text: // This file was generated by libdot/bin/concat.sh.
  // It has been marked read-only for your safety.  Rather
  // than edit it directly, please modify one of these source
  // files...
  //
  // libdot/js/lib.js
  // libdot/js/lib_colors.js
  // libdot/js/lib_f.js
  // libdot/js/lib_message_manager.js
  // libdot/js/lib_preference_manager.js
  // libdot/js/lib_resource.js
  // libdot/js/lib_storage.js
  // libdot/js/lib_storage_chrome.js
  // libdot/js/lib_storage_local.js
  // libdot/js/lib_storage_memory.js
  // libdot/js/lib_test_manager.js
  // libdot/js/lib_utf8.js
  // libdot/js/lib_wc.js
  // hterm/js/hterm.js
  // hterm/js/hterm_frame.js
  // hterm/js/hterm_keyboard.js
  // hterm/js/hterm_keyboard_bindings.js
  // hterm/js/hterm_keyboard_keymap.js
  // hterm/js/hterm_keyboard_keypattern.js
  // hterm/js/hterm_options.js
  // hterm/js/hterm_parser.js
  // hterm/js/hterm_parser_identifiers.js
  // hterm/js/hterm_preference_manager.js
  // hterm/js/hterm_pubsub.js
  // hterm/js/hterm_screen.js
  // hterm/js/hterm_scrollport.js
  // hterm/js/hterm_terminal.js
  // hterm/js/hterm_terminal_io.js
  // hterm/js/hterm_text_attributes.js
  // hterm/js/hterm_vt.js
  // hterm/js/hterm_vt_character_map.js
  //
  
  // SOURCE FILE: libdot/js/lib.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  if (typeof lib != 'undefined')
    throw new Error('Global "lib" object already exists.');
  
  var lib = {};
  
  /**
   * Map of "dependency" to ["source", ...].
   *
   * Each dependency is a object name, like "lib.fs", "source" is the url that
   * depdends on the object.
   */
  lib.runtimeDependencies_ = {};
  
  /**
   * List of functions that need to be invoked during library initialization.
   *
   * Each element in the initCallbacks_ array is itself a two-element array.
   * Element 0 is a short string describing the owner of the init routine, useful
   * for debugging.  Element 1 is the callback function.
   */
  lib.initCallbacks_ = [];
  
  /**
   * Records a runtime dependency.
   *
   * This can be useful when you want to express a run-time dependency at
   * compile time.  It is not intended to be a full-fledged library system or
   * dependency tracker.  It's just there to make it possible to debug the
   * deps without running all the code.
   *
   * Object names are specified as strings.  For example...
   *
   *     lib.rtdep('lib.colors', 'lib.PreferenceManager');
   *
   * Object names need not be rooted by 'lib'.  You may use this to declare a
   * dependency on any object.
   *
   * The client program may call lib.ensureRuntimeDependencies() at startup in
   * order to ensure that all runtime dependencies have been met.
   *
   * @param {string} var_args One or more objects specified as strings.
   */
  lib.rtdep = function(var_args) {
    var source;
  
    try {
      throw new Error();
    } catch (ex) {
      var stackArray = ex.stack.split('\n');
      // In Safari, the resulting stackArray will only have 2 elements and the
      // individual strings are formatted differently.
      if (stackArray.length >= 3) {
        source = stackArray[2].replace(/^\s*at\s+/, '');
      } else {
        source = stackArray[1].replace(/^\s*global code@/, '');
      }
    }
  
    for (var i = 0; i < arguments.length; i++) {
      var path = arguments[i];
      if (path instanceof Array) {
        lib.rtdep.apply(lib, path);
      } else {
        var ary = this.runtimeDependencies_[path];
        if (!ary)
          ary = this.runtimeDependencies_[path] = [];
        ary.push(source);
      }
    }
  };
  
  /**
   * Ensures that all runtime dependencies are met, or an exception is thrown.
   *
   * Every unmet runtime dependency will be logged to the JS console.  If at
   * least one dependency is unmet this will raise an exception.
   */
  lib.ensureRuntimeDependencies_ = function() {
    var passed = true;
  
    for (var path in lib.runtimeDependencies_) {
      var sourceList = lib.runtimeDependencies_[path];
      var names = path.split('.');
  
      // In a document context 'window' is the global object.  In a worker it's
      // called 'self'.
      var obj = (window || self);
      for (var i = 0; i < names.length; i++) {
        if (!(names[i] in obj)) {
          console.warn('Missing "' + path + '" is needed by', sourceList);
          passed = false;
          break;
        }
  
        obj = obj[names[i]];
      }
    }
  
    if (!passed)
      throw new Error('Failed runtime dependency check');
  };
  
  /**
   * Register an initialization function.
   *
   * The initialization functions are invoked in registration order when
   * lib.init() is invoked.  Each function will receive a single parameter, which
   * is a function to be invoked when it completes its part of the initialization.
   *
   * @param {string} name A short descriptive name of the init routine useful for
   *     debugging.
   * @param {function(function)} callback The initialization function to register.
   * @return {function} The callback parameter.
   */
  lib.registerInit = function(name, callback) {
    lib.initCallbacks_.push([name, callback]);
    return callback;
  };
  
  /**
   * Initialize the library.
   *
   * This will ensure that all registered runtime dependencies are met, and
   * invoke any registered initialization functions.
   *
   * Initialization is asynchronous.  The library is not ready for use until
   * the onInit function is invoked.
   *
   * @param {function()} onInit The function to invoke when initialization is
   *     complete.
   * @param {function(*)} opt_logFunction An optional function to send
   *     initialization related log messages to.
   */
  lib.init = function(onInit, opt_logFunction) {
    var ary = lib.initCallbacks_;
  
    var initNext = function() {
      if (ary.length) {
        var rec = ary.shift();
        if (opt_logFunction)
          opt_logFunction('init: ' + rec[0]);
        rec[1](lib.f.alarm(initNext));
      } else {
        onInit();
      }
    };
  
    if (typeof onInit != 'function')
      throw new Error('Missing or invalid argument: onInit');
  
    lib.ensureRuntimeDependencies_();
  
    setTimeout(initNext, 0);
  };
  // SOURCE FILE: libdot/js/lib_colors.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  /**
   * Namespace for color utilities.
   */
  lib.colors = {};
  
  /**
   * First, some canned regular expressions we're going to use in this file.
   *
   *
   *                              BRACE YOURSELF
   *
   *                                 ,~~~~.
   *                                 |>_< ~~
   *                                3`---'-/.
   *                                3:::::\v\
   *                               =o=:::::\,\
   *                                | :::::\,,\
   *
   *                        THE REGULAR EXPRESSIONS
   *                               ARE COMING.
   *
   * There's no way to break long RE literals in JavaScript.  Fix that why don't
   * you?  Oh, and also there's no way to write a string that doesn't interpret
   * escapes.
   *
   * Instead, we stoop to this .replace() trick.
   */
  lib.colors.re_ = {
    // CSS hex color, #RGB.
    hex16: /#([a-f0-9])([a-f0-9])([a-f0-9])/i,
  
    // CSS hex color, #RRGGBB.
    hex24: /#([a-f0-9]{2})([a-f0-9]{2})([a-f0-9]{2})/i,
  
    // CSS rgb color, rgb(rrr,ggg,bbb).
    rgb: new RegExp(
        ('^/s*rgb/s*/(/s*(/d{1,3})/s*,/s*(/d{1,3})/s*,' +
         '/s*(/d{1,3})/s*/)/s*$'
         ).replace(/\//g, '\\'), 'i'),
  
    // CSS rgb color, rgb(rrr,ggg,bbb,aaa).
    rgba: new RegExp(
        ('^/s*rgba/s*' +
         '/(/s*(/d{1,3})/s*,/s*(/d{1,3})/s*,/s*(/d{1,3})/s*' +
         '(?:,/s*(/d+(?:/./d+)?)/s*)/)/s*$'
         ).replace(/\//g, '\\'), 'i'),
  
    // Either RGB or RGBA.
    rgbx: new RegExp(
        ('^/s*rgba?/s*' +
         '/(/s*(/d{1,3})/s*,/s*(/d{1,3})/s*,/s*(/d{1,3})/s*' +
         '(?:,/s*(/d+(?:/./d+)?)/s*)?/)/s*$'
         ).replace(/\//g, '\\'), 'i'),
  
    // An X11 "rgb:ddd/ddd/ddd" value.
    x11rgb: /^\s*rgb:([a-f0-9]{1,4})\/([a-f0-9]{1,4})\/([a-f0-9]{1,4})\s*$/i,
  
    // English color name.
    name: /[a-z][a-z0-9\s]+/,
  };
  
  /**
   * Convert a CSS rgb(ddd,ddd,ddd) color value into an X11 color value.
   *
   * Other CSS color values are ignored to ensure sanitary data handling.
   *
   * Each 'ddd' component is a one byte value specified in decimal.
   *
   * @param {string} value The CSS color value to convert.
   * @return {string} The X11 color value or null if the value could not be
   *     converted.
   */
  lib.colors.rgbToX11 = function(value) {
    function scale(v) {
      v = (Math.min(v, 255) * 257).toString(16);
      while (v.length < 4)
        v = '0' + v;
  
      return v;
    }
  
    var ary = value.match(lib.colors.re_.rgbx);
    if (!ary)
      return null;
  
    return 'rgb:' + scale(ary[1]) + '/' + scale(ary[2]) + '/' + scale(ary[3]);
  };
  
  /**
   * Convert an X11 color value into an CSS rgb(...) color value.
   *
   * The X11 value may be an X11 color name, or an RGB value of the form
   * rgb:hhhh/hhhh/hhhh.  If a component value is less than 4 digits it is
   * padded out to 4, then scaled down to fit in a single byte.
   *
   * @param {string} value The X11 color value to convert.
   * @return {string} The CSS color value or null if the value could not be
   *     converted.
   */
  lib.colors.x11ToCSS = function(v) {
    function scale(v) {
      // Pad out values with less than four digits.  This padding (probably)
      // matches xterm.  It's difficult to say for sure since xterm seems to
      // arrive at a padded value and then perform some combination of
      // gamma correction, color space tranformation, and quantization.
  
      if (v.length == 1) {
        // Single digits pad out to four by repeating the character.  "f" becomes
        // "ffff".  Scaling down a hex value of this pattern by 257 is the same
        // as cutting off one byte.  We skip the middle step and just double
        // the character.
        return parseInt(v + v, 16);
      }
  
      if (v.length == 2) {
        // Similar deal here.  X11 pads two digit values by repeating the
        // byte (or scale up by 257).  Since we're going to scale it back
        // down anyway, we can just return the original value.
        return parseInt(v, 16);
      }
  
      if (v.length == 3) {
        // Three digit values seem to be padded by repeating the final digit.
        // e.g. 10f becomes 10ff.
        v = v + v.substr(2);
      }
  
      // Scale down the 2 byte value.
      return Math.round(parseInt(v, 16) / 257);
    }
  
    var ary = v.match(lib.colors.re_.x11rgb);
    if (!ary)
      return lib.colors.nameToRGB(v);
  
    ary.splice(0, 1);
    return lib.colors.arrayToRGBA(ary.map(scale));
  };
  
  /**
   * Converts one or more CSS '#RRGGBB' color values into their rgb(...)
   * form.
   *
   * Arrays are converted in place. If a value cannot be converted, it is
   * replaced with null.
   *
   * @param {string|Array.<string>} A single RGB value or array of RGB values to
   *     convert.
   * @return {string|Array.<string>} The converted value or values.
   */
  lib.colors.hexToRGB = function(arg) {
    function convert(hex) {
      var re = (hex.length == 4) ?
          lib.colors.re_.hex16 : lib.colors.re_.hex24;
      var ary = hex.match(re)
      if (!ary)
        return null;
  
      return 'rgb(' + parseInt(ary[1], 16) + ', ' +
          parseInt(ary[2], 16) + ', ' +
          parseInt(ary[3], 16) + ')';
    }
  
    if (arg instanceof Array) {
      for (var i = 0; i < arg.length; i++) {
        arg[i] = convert(arg[i]);
      }
    } else {
      arg = convert(arg);
    }
  
    return arg;
  };
  
  /**
   * Converts one or more CSS rgb(...) forms into their '#RRGGBB' color values.
   *
   * If given an rgba(...) form, the alpha field is thrown away.
   *
   * Arrays are converted in place. If a value cannot be converted, it is
   * replaced with null.
   *
   * @param {string|Array.<string>} A single rgb(...) value or array of rgb(...)
   *     values to convert.
   * @return {string|Array.<string>} The converted value or values.
   */
  lib.colors.rgbToHex = function(arg) {
    function convert(rgb) {
      var ary = lib.colors.crackRGB(rgb);
      return '#' + lib.f.zpad(((parseInt(ary[0]) << 16) |
                               (parseInt(ary[1]) <<  8) |
                               (parseInt(ary[2]) <<  0)).toString(16), 6);
    }
  
    if (arg instanceof Array) {
      for (var i = 0; i < arg.length; i++) {
        arg[i] = convert(arg[i]);
      }
    } else {
      arg = convert(arg);
    }
  
    return arg;
  };
  
  /**
   * Take any valid css color definition and turn it into an rgb or rgba value.
   *
   * Returns null if the value could not be normalized.
   */
  lib.colors.normalizeCSS = function(def) {
    if (def.substr(0, 1) == '#')
      return lib.colors.hexToRGB(def);
  
    if (lib.colors.re_.rgbx.test(def))
      return def;
  
    return lib.colors.nameToRGB(def);
  };
  
  /**
   * Convert a 3 or 4 element array into an rgba(...) string.
   */
  lib.colors.arrayToRGBA = function(ary) {
    var alpha = (ary.length > 3) ? ary[3] : 1;
    return 'rgba(' + ary[0] + ', ' + ary[1] + ', ' + ary[2] + ', ' + alpha + ')';
  };
  
  /**
   * Overwrite the alpha channel of an rgb/rgba color.
   */
  lib.colors.setAlpha = function(rgb, alpha) {
    var ary = lib.colors.crackRGB(rgb);
    ary[3] = alpha;
    return lib.colors.arrayToRGBA(ary);
  };
  
  /**
   * Mix a percentage of a tint color into a base color.
   */
  lib.colors.mix = function(base, tint, percent) {
    var ary1 = lib.colors.crackRGB(base);
    var ary2 = lib.colors.crackRGB(tint);
  
    for (var i = 0; i < 4; ++i) {
      var diff = ary2[i] - ary1[i];
      ary1[i] = Math.round(parseInt(ary1[i]) + diff * percent);
    }
  
    return lib.colors.arrayToRGBA(ary1);
  };
  
  /**
   * Split an rgb/rgba color into an array of its components.
   *
   * On success, a 4 element array will be returned.  For rgb values, the alpha
   * will be set to 1.
   */
  lib.colors.crackRGB = function(color) {
    if (color.substr(0, 4) == 'rgba') {
      var ary = color.match(lib.colors.re_.rgba);
      if (ary) {
        ary.shift();
        return ary;
      }
    } else {
      var ary = color.match(lib.colors.re_.rgb);
      if (ary) {
        ary.shift();
        ary.push(1);
        return ary;
      }
    }
  
    console.error('Couldn\'t crack: ' + color);
    return null;
  };
  
  /**
   * Convert an X11 color name into a CSS rgb(...) value.
   *
   * Names are stripped of spaces and converted to lowercase.  If the name is
   * unknown, null is returned.
   *
   * This list of color name to RGB mapping is derived from the stock X11
   * rgb.txt file.
   *
   * @param {string} name The color name to convert.
   * @return {string} The corresponding CSS rgb(...) value.
   */
  lib.colors.nameToRGB = function(name) {
    if (name in lib.colors.colorNames)
      return lib.colors.colorNames[name];
  
    name = name.toLowerCase();
    if (name in lib.colors.colorNames)
      return lib.colors.colorNames[name];
  
    name = name.replace(/\s+/g, '');
    if (name in lib.colors.colorNames)
      return lib.colors.colorNames[name];
  
    return null;
  };
  
  /**
   * The stock color palette.
   */
  lib.colors.stockColorPalette = lib.colors.hexToRGB
    ([// The "ANSI 16"...
      '#000000', '#CC0000', '#4E9A06', '#C4A000',
      '#3465A4', '#75507B', '#06989A', '#D3D7CF',
      '#555753', '#EF2929', '#00BA13', '#FCE94F',
      '#729FCF', '#F200CB', '#00B5BD', '#EEEEEC',
  
      // The 6x6 color cubes...
      '#000000', '#00005F', '#000087', '#0000AF', '#0000D7', '#0000FF',
      '#005F00', '#005F5F', '#005F87', '#005FAF', '#005FD7', '#005FFF',
      '#008700', '#00875F', '#008787', '#0087AF', '#0087D7', '#0087FF',
      '#00AF00', '#00AF5F', '#00AF87', '#00AFAF', '#00AFD7', '#00AFFF',
      '#00D700', '#00D75F', '#00D787', '#00D7AF', '#00D7D7', '#00D7FF',
      '#00FF00', '#00FF5F', '#00FF87', '#00FFAF', '#00FFD7', '#00FFFF',
  
      '#5F0000', '#5F005F', '#5F0087', '#5F00AF', '#5F00D7', '#5F00FF',
      '#5F5F00', '#5F5F5F', '#5F5F87', '#5F5FAF', '#5F5FD7', '#5F5FFF',
      '#5F8700', '#5F875F', '#5F8787', '#5F87AF', '#5F87D7', '#5F87FF',
      '#5FAF00', '#5FAF5F', '#5FAF87', '#5FAFAF', '#5FAFD7', '#5FAFFF',
      '#5FD700', '#5FD75F', '#5FD787', '#5FD7AF', '#5FD7D7', '#5FD7FF',
      '#5FFF00', '#5FFF5F', '#5FFF87', '#5FFFAF', '#5FFFD7', '#5FFFFF',
  
      '#870000', '#87005F', '#870087', '#8700AF', '#8700D7', '#8700FF',
      '#875F00', '#875F5F', '#875F87', '#875FAF', '#875FD7', '#875FFF',
      '#878700', '#87875F', '#878787', '#8787AF', '#8787D7', '#8787FF',
      '#87AF00', '#87AF5F', '#87AF87', '#87AFAF', '#87AFD7', '#87AFFF',
      '#87D700', '#87D75F', '#87D787', '#87D7AF', '#87D7D7', '#87D7FF',
      '#87FF00', '#87FF5F', '#87FF87', '#87FFAF', '#87FFD7', '#87FFFF',
  
      '#AF0000', '#AF005F', '#AF0087', '#AF00AF', '#AF00D7', '#AF00FF',
      '#AF5F00', '#AF5F5F', '#AF5F87', '#AF5FAF', '#AF5FD7', '#AF5FFF',
      '#AF8700', '#AF875F', '#AF8787', '#AF87AF', '#AF87D7', '#AF87FF',
      '#AFAF00', '#AFAF5F', '#AFAF87', '#AFAFAF', '#AFAFD7', '#AFAFFF',
      '#AFD700', '#AFD75F', '#AFD787', '#AFD7AF', '#AFD7D7', '#AFD7FF',
      '#AFFF00', '#AFFF5F', '#AFFF87', '#AFFFAF', '#AFFFD7', '#AFFFFF',
  
      '#D70000', '#D7005F', '#D70087', '#D700AF', '#D700D7', '#D700FF',
      '#D75F00', '#D75F5F', '#D75F87', '#D75FAF', '#D75FD7', '#D75FFF',
      '#D78700', '#D7875F', '#D78787', '#D787AF', '#D787D7', '#D787FF',
      '#D7AF00', '#D7AF5F', '#D7AF87', '#D7AFAF', '#D7AFD7', '#D7AFFF',
      '#D7D700', '#D7D75F', '#D7D787', '#D7D7AF', '#D7D7D7', '#D7D7FF',
      '#D7FF00', '#D7FF5F', '#D7FF87', '#D7FFAF', '#D7FFD7', '#D7FFFF',
  
      '#FF0000', '#FF005F', '#FF0087', '#FF00AF', '#FF00D7', '#FF00FF',
      '#FF5F00', '#FF5F5F', '#FF5F87', '#FF5FAF', '#FF5FD7', '#FF5FFF',
      '#FF8700', '#FF875F', '#FF8787', '#FF87AF', '#FF87D7', '#FF87FF',
      '#FFAF00', '#FFAF5F', '#FFAF87', '#FFAFAF', '#FFAFD7', '#FFAFFF',
      '#FFD700', '#FFD75F', '#FFD787', '#FFD7AF', '#FFD7D7', '#FFD7FF',
      '#FFFF00', '#FFFF5F', '#FFFF87', '#FFFFAF', '#FFFFD7', '#FFFFFF',
  
      // The greyscale ramp...
      '#080808', '#121212', '#1C1C1C', '#262626', '#303030', '#3A3A3A',
      '#444444', '#4E4E4E', '#585858', '#626262', '#6C6C6C', '#767676',
      '#808080', '#8A8A8A', '#949494', '#9E9E9E', '#A8A8A8', '#B2B2B2',
      '#BCBCBC', '#C6C6C6', '#D0D0D0', '#DADADA', '#E4E4E4', '#EEEEEE'
     ]);
  
  /**
   * The current color palette, possibly with user changes.
   */
  lib.colors.colorPalette = lib.colors.stockColorPalette;
  
  /**
   * Named colors according to the stock X11 rgb.txt file.
   */
  lib.colors.colorNames = {
    "aliceblue": "rgb(240, 248, 255)",
    "antiquewhite": "rgb(250, 235, 215)",
    "antiquewhite1": "rgb(255, 239, 219)",
    "antiquewhite2": "rgb(238, 223, 204)",
    "antiquewhite3": "rgb(205, 192, 176)",
    "antiquewhite4": "rgb(139, 131, 120)",
    "aquamarine": "rgb(127, 255, 212)",
    "aquamarine1": "rgb(127, 255, 212)",
    "aquamarine2": "rgb(118, 238, 198)",
    "aquamarine3": "rgb(102, 205, 170)",
    "aquamarine4": "rgb(69, 139, 116)",
    "azure": "rgb(240, 255, 255)",
    "azure1": "rgb(240, 255, 255)",
    "azure2": "rgb(224, 238, 238)",
    "azure3": "rgb(193, 205, 205)",
    "azure4": "rgb(131, 139, 139)",
    "beige": "rgb(245, 245, 220)",
    "bisque": "rgb(255, 228, 196)",
    "bisque1": "rgb(255, 228, 196)",
    "bisque2": "rgb(238, 213, 183)",
    "bisque3": "rgb(205, 183, 158)",
    "bisque4": "rgb(139, 125, 107)",
    "black": "rgb(0, 0, 0)",
    "blanchedalmond": "rgb(255, 235, 205)",
    "blue": "rgb(0, 0, 255)",
    "blue1": "rgb(0, 0, 255)",
    "blue2": "rgb(0, 0, 238)",
    "blue3": "rgb(0, 0, 205)",
    "blue4": "rgb(0, 0, 139)",
    "blueviolet": "rgb(138, 43, 226)",
    "brown": "rgb(165, 42, 42)",
    "brown1": "rgb(255, 64, 64)",
    "brown2": "rgb(238, 59, 59)",
    "brown3": "rgb(205, 51, 51)",
    "brown4": "rgb(139, 35, 35)",
    "burlywood": "rgb(222, 184, 135)",
    "burlywood1": "rgb(255, 211, 155)",
    "burlywood2": "rgb(238, 197, 145)",
    "burlywood3": "rgb(205, 170, 125)",
    "burlywood4": "rgb(139, 115, 85)",
    "cadetblue": "rgb(95, 158, 160)",
    "cadetblue1": "rgb(152, 245, 255)",
    "cadetblue2": "rgb(142, 229, 238)",
    "cadetblue3": "rgb(122, 197, 205)",
    "cadetblue4": "rgb(83, 134, 139)",
    "chartreuse": "rgb(127, 255, 0)",
    "chartreuse1": "rgb(127, 255, 0)",
    "chartreuse2": "rgb(118, 238, 0)",
    "chartreuse3": "rgb(102, 205, 0)",
    "chartreuse4": "rgb(69, 139, 0)",
    "chocolate": "rgb(210, 105, 30)",
    "chocolate1": "rgb(255, 127, 36)",
    "chocolate2": "rgb(238, 118, 33)",
    "chocolate3": "rgb(205, 102, 29)",
    "chocolate4": "rgb(139, 69, 19)",
    "coral": "rgb(255, 127, 80)",
    "coral1": "rgb(255, 114, 86)",
    "coral2": "rgb(238, 106, 80)",
    "coral3": "rgb(205, 91, 69)",
    "coral4": "rgb(139, 62, 47)",
    "cornflowerblue": "rgb(100, 149, 237)",
    "cornsilk": "rgb(255, 248, 220)",
    "cornsilk1": "rgb(255, 248, 220)",
    "cornsilk2": "rgb(238, 232, 205)",
    "cornsilk3": "rgb(205, 200, 177)",
    "cornsilk4": "rgb(139, 136, 120)",
    "cyan": "rgb(0, 255, 255)",
    "cyan1": "rgb(0, 255, 255)",
    "cyan2": "rgb(0, 238, 238)",
    "cyan3": "rgb(0, 205, 205)",
    "cyan4": "rgb(0, 139, 139)",
    "darkblue": "rgb(0, 0, 139)",
    "darkcyan": "rgb(0, 139, 139)",
    "darkgoldenrod": "rgb(184, 134, 11)",
    "darkgoldenrod1": "rgb(255, 185, 15)",
    "darkgoldenrod2": "rgb(238, 173, 14)",
    "darkgoldenrod3": "rgb(205, 149, 12)",
    "darkgoldenrod4": "rgb(139, 101, 8)",
    "darkgray": "rgb(169, 169, 169)",
    "darkgreen": "rgb(0, 100, 0)",
    "darkgrey": "rgb(169, 169, 169)",
    "darkkhaki": "rgb(189, 183, 107)",
    "darkmagenta": "rgb(139, 0, 139)",
    "darkolivegreen": "rgb(85, 107, 47)",
    "darkolivegreen1": "rgb(202, 255, 112)",
    "darkolivegreen2": "rgb(188, 238, 104)",
    "darkolivegreen3": "rgb(162, 205, 90)",
    "darkolivegreen4": "rgb(110, 139, 61)",
    "darkorange": "rgb(255, 140, 0)",
    "darkorange1": "rgb(255, 127, 0)",
    "darkorange2": "rgb(238, 118, 0)",
    "darkorange3": "rgb(205, 102, 0)",
    "darkorange4": "rgb(139, 69, 0)",
    "darkorchid": "rgb(153, 50, 204)",
    "darkorchid1": "rgb(191, 62, 255)",
    "darkorchid2": "rgb(178, 58, 238)",
    "darkorchid3": "rgb(154, 50, 205)",
    "darkorchid4": "rgb(104, 34, 139)",
    "darkred": "rgb(139, 0, 0)",
    "darksalmon": "rgb(233, 150, 122)",
    "darkseagreen": "rgb(143, 188, 143)",
    "darkseagreen1": "rgb(193, 255, 193)",
    "darkseagreen2": "rgb(180, 238, 180)",
    "darkseagreen3": "rgb(155, 205, 155)",
    "darkseagreen4": "rgb(105, 139, 105)",
    "darkslateblue": "rgb(72, 61, 139)",
    "darkslategray": "rgb(47, 79, 79)",
    "darkslategray1": "rgb(151, 255, 255)",
    "darkslategray2": "rgb(141, 238, 238)",
    "darkslategray3": "rgb(121, 205, 205)",
    "darkslategray4": "rgb(82, 139, 139)",
    "darkslategrey": "rgb(47, 79, 79)",
    "darkturquoise": "rgb(0, 206, 209)",
    "darkviolet": "rgb(148, 0, 211)",
    "debianred": "rgb(215, 7, 81)",
    "deeppink": "rgb(255, 20, 147)",
    "deeppink1": "rgb(255, 20, 147)",
    "deeppink2": "rgb(238, 18, 137)",
    "deeppink3": "rgb(205, 16, 118)",
    "deeppink4": "rgb(139, 10, 80)",
    "deepskyblue": "rgb(0, 191, 255)",
    "deepskyblue1": "rgb(0, 191, 255)",
    "deepskyblue2": "rgb(0, 178, 238)",
    "deepskyblue3": "rgb(0, 154, 205)",
    "deepskyblue4": "rgb(0, 104, 139)",
    "dimgray": "rgb(105, 105, 105)",
    "dimgrey": "rgb(105, 105, 105)",
    "dodgerblue": "rgb(30, 144, 255)",
    "dodgerblue1": "rgb(30, 144, 255)",
    "dodgerblue2": "rgb(28, 134, 238)",
    "dodgerblue3": "rgb(24, 116, 205)",
    "dodgerblue4": "rgb(16, 78, 139)",
    "firebrick": "rgb(178, 34, 34)",
    "firebrick1": "rgb(255, 48, 48)",
    "firebrick2": "rgb(238, 44, 44)",
    "firebrick3": "rgb(205, 38, 38)",
    "firebrick4": "rgb(139, 26, 26)",
    "floralwhite": "rgb(255, 250, 240)",
    "forestgreen": "rgb(34, 139, 34)",
    "gainsboro": "rgb(220, 220, 220)",
    "ghostwhite": "rgb(248, 248, 255)",
    "gold": "rgb(255, 215, 0)",
    "gold1": "rgb(255, 215, 0)",
    "gold2": "rgb(238, 201, 0)",
    "gold3": "rgb(205, 173, 0)",
    "gold4": "rgb(139, 117, 0)",
    "goldenrod": "rgb(218, 165, 32)",
    "goldenrod1": "rgb(255, 193, 37)",
    "goldenrod2": "rgb(238, 180, 34)",
    "goldenrod3": "rgb(205, 155, 29)",
    "goldenrod4": "rgb(139, 105, 20)",
    "gray": "rgb(190, 190, 190)",
    "gray0": "rgb(0, 0, 0)",
    "gray1": "rgb(3, 3, 3)",
    "gray10": "rgb(26, 26, 26)",
    "gray100": "rgb(255, 255, 255)",
    "gray11": "rgb(28, 28, 28)",
    "gray12": "rgb(31, 31, 31)",
    "gray13": "rgb(33, 33, 33)",
    "gray14": "rgb(36, 36, 36)",
    "gray15": "rgb(38, 38, 38)",
    "gray16": "rgb(41, 41, 41)",
    "gray17": "rgb(43, 43, 43)",
    "gray18": "rgb(46, 46, 46)",
    "gray19": "rgb(48, 48, 48)",
    "gray2": "rgb(5, 5, 5)",
    "gray20": "rgb(51, 51, 51)",
    "gray21": "rgb(54, 54, 54)",
    "gray22": "rgb(56, 56, 56)",
    "gray23": "rgb(59, 59, 59)",
    "gray24": "rgb(61, 61, 61)",
    "gray25": "rgb(64, 64, 64)",
    "gray26": "rgb(66, 66, 66)",
    "gray27": "rgb(69, 69, 69)",
    "gray28": "rgb(71, 71, 71)",
    "gray29": "rgb(74, 74, 74)",
    "gray3": "rgb(8, 8, 8)",
    "gray30": "rgb(77, 77, 77)",
    "gray31": "rgb(79, 79, 79)",
    "gray32": "rgb(82, 82, 82)",
    "gray33": "rgb(84, 84, 84)",
    "gray34": "rgb(87, 87, 87)",
    "gray35": "rgb(89, 89, 89)",
    "gray36": "rgb(92, 92, 92)",
    "gray37": "rgb(94, 94, 94)",
    "gray38": "rgb(97, 97, 97)",
    "gray39": "rgb(99, 99, 99)",
    "gray4": "rgb(10, 10, 10)",
    "gray40": "rgb(102, 102, 102)",
    "gray41": "rgb(105, 105, 105)",
    "gray42": "rgb(107, 107, 107)",
    "gray43": "rgb(110, 110, 110)",
    "gray44": "rgb(112, 112, 112)",
    "gray45": "rgb(115, 115, 115)",
    "gray46": "rgb(117, 117, 117)",
    "gray47": "rgb(120, 120, 120)",
    "gray48": "rgb(122, 122, 122)",
    "gray49": "rgb(125, 125, 125)",
    "gray5": "rgb(13, 13, 13)",
    "gray50": "rgb(127, 127, 127)",
    "gray51": "rgb(130, 130, 130)",
    "gray52": "rgb(133, 133, 133)",
    "gray53": "rgb(135, 135, 135)",
    "gray54": "rgb(138, 138, 138)",
    "gray55": "rgb(140, 140, 140)",
    "gray56": "rgb(143, 143, 143)",
    "gray57": "rgb(145, 145, 145)",
    "gray58": "rgb(148, 148, 148)",
    "gray59": "rgb(150, 150, 150)",
    "gray6": "rgb(15, 15, 15)",
    "gray60": "rgb(153, 153, 153)",
    "gray61": "rgb(156, 156, 156)",
    "gray62": "rgb(158, 158, 158)",
    "gray63": "rgb(161, 161, 161)",
    "gray64": "rgb(163, 163, 163)",
    "gray65": "rgb(166, 166, 166)",
    "gray66": "rgb(168, 168, 168)",
    "gray67": "rgb(171, 171, 171)",
    "gray68": "rgb(173, 173, 173)",
    "gray69": "rgb(176, 176, 176)",
    "gray7": "rgb(18, 18, 18)",
    "gray70": "rgb(179, 179, 179)",
    "gray71": "rgb(181, 181, 181)",
    "gray72": "rgb(184, 184, 184)",
    "gray73": "rgb(186, 186, 186)",
    "gray74": "rgb(189, 189, 189)",
    "gray75": "rgb(191, 191, 191)",
    "gray76": "rgb(194, 194, 194)",
    "gray77": "rgb(196, 196, 196)",
    "gray78": "rgb(199, 199, 199)",
    "gray79": "rgb(201, 201, 201)",
    "gray8": "rgb(20, 20, 20)",
    "gray80": "rgb(204, 204, 204)",
    "gray81": "rgb(207, 207, 207)",
    "gray82": "rgb(209, 209, 209)",
    "gray83": "rgb(212, 212, 212)",
    "gray84": "rgb(214, 214, 214)",
    "gray85": "rgb(217, 217, 217)",
    "gray86": "rgb(219, 219, 219)",
    "gray87": "rgb(222, 222, 222)",
    "gray88": "rgb(224, 224, 224)",
    "gray89": "rgb(227, 227, 227)",
    "gray9": "rgb(23, 23, 23)",
    "gray90": "rgb(229, 229, 229)",
    "gray91": "rgb(232, 232, 232)",
    "gray92": "rgb(235, 235, 235)",
    "gray93": "rgb(237, 237, 237)",
    "gray94": "rgb(240, 240, 240)",
    "gray95": "rgb(242, 242, 242)",
    "gray96": "rgb(245, 245, 245)",
    "gray97": "rgb(247, 247, 247)",
    "gray98": "rgb(250, 250, 250)",
    "gray99": "rgb(252, 252, 252)",
    "green": "rgb(0, 255, 0)",
    "green1": "rgb(0, 255, 0)",
    "green2": "rgb(0, 238, 0)",
    "green3": "rgb(0, 205, 0)",
    "green4": "rgb(0, 139, 0)",
    "greenyellow": "rgb(173, 255, 47)",
    "grey": "rgb(190, 190, 190)",
    "grey0": "rgb(0, 0, 0)",
    "grey1": "rgb(3, 3, 3)",
    "grey10": "rgb(26, 26, 26)",
    "grey100": "rgb(255, 255, 255)",
    "grey11": "rgb(28, 28, 28)",
    "grey12": "rgb(31, 31, 31)",
    "grey13": "rgb(33, 33, 33)",
    "grey14": "rgb(36, 36, 36)",
    "grey15": "rgb(38, 38, 38)",
    "grey16": "rgb(41, 41, 41)",
    "grey17": "rgb(43, 43, 43)",
    "grey18": "rgb(46, 46, 46)",
    "grey19": "rgb(48, 48, 48)",
    "grey2": "rgb(5, 5, 5)",
    "grey20": "rgb(51, 51, 51)",
    "grey21": "rgb(54, 54, 54)",
    "grey22": "rgb(56, 56, 56)",
    "grey23": "rgb(59, 59, 59)",
    "grey24": "rgb(61, 61, 61)",
    "grey25": "rgb(64, 64, 64)",
    "grey26": "rgb(66, 66, 66)",
    "grey27": "rgb(69, 69, 69)",
    "grey28": "rgb(71, 71, 71)",
    "grey29": "rgb(74, 74, 74)",
    "grey3": "rgb(8, 8, 8)",
    "grey30": "rgb(77, 77, 77)",
    "grey31": "rgb(79, 79, 79)",
    "grey32": "rgb(82, 82, 82)",
    "grey33": "rgb(84, 84, 84)",
    "grey34": "rgb(87, 87, 87)",
    "grey35": "rgb(89, 89, 89)",
    "grey36": "rgb(92, 92, 92)",
    "grey37": "rgb(94, 94, 94)",
    "grey38": "rgb(97, 97, 97)",
    "grey39": "rgb(99, 99, 99)",
    "grey4": "rgb(10, 10, 10)",
    "grey40": "rgb(102, 102, 102)",
    "grey41": "rgb(105, 105, 105)",
    "grey42": "rgb(107, 107, 107)",
    "grey43": "rgb(110, 110, 110)",
    "grey44": "rgb(112, 112, 112)",
    "grey45": "rgb(115, 115, 115)",
    "grey46": "rgb(117, 117, 117)",
    "grey47": "rgb(120, 120, 120)",
    "grey48": "rgb(122, 122, 122)",
    "grey49": "rgb(125, 125, 125)",
    "grey5": "rgb(13, 13, 13)",
    "grey50": "rgb(127, 127, 127)",
    "grey51": "rgb(130, 130, 130)",
    "grey52": "rgb(133, 133, 133)",
    "grey53": "rgb(135, 135, 135)",
    "grey54": "rgb(138, 138, 138)",
    "grey55": "rgb(140, 140, 140)",
    "grey56": "rgb(143, 143, 143)",
    "grey57": "rgb(145, 145, 145)",
    "grey58": "rgb(148, 148, 148)",
    "grey59": "rgb(150, 150, 150)",
    "grey6": "rgb(15, 15, 15)",
    "grey60": "rgb(153, 153, 153)",
    "grey61": "rgb(156, 156, 156)",
    "grey62": "rgb(158, 158, 158)",
    "grey63": "rgb(161, 161, 161)",
    "grey64": "rgb(163, 163, 163)",
    "grey65": "rgb(166, 166, 166)",
    "grey66": "rgb(168, 168, 168)",
    "grey67": "rgb(171, 171, 171)",
    "grey68": "rgb(173, 173, 173)",
    "grey69": "rgb(176, 176, 176)",
    "grey7": "rgb(18, 18, 18)",
    "grey70": "rgb(179, 179, 179)",
    "grey71": "rgb(181, 181, 181)",
    "grey72": "rgb(184, 184, 184)",
    "grey73": "rgb(186, 186, 186)",
    "grey74": "rgb(189, 189, 189)",
    "grey75": "rgb(191, 191, 191)",
    "grey76": "rgb(194, 194, 194)",
    "grey77": "rgb(196, 196, 196)",
    "grey78": "rgb(199, 199, 199)",
    "grey79": "rgb(201, 201, 201)",
    "grey8": "rgb(20, 20, 20)",
    "grey80": "rgb(204, 204, 204)",
    "grey81": "rgb(207, 207, 207)",
    "grey82": "rgb(209, 209, 209)",
    "grey83": "rgb(212, 212, 212)",
    "grey84": "rgb(214, 214, 214)",
    "grey85": "rgb(217, 217, 217)",
    "grey86": "rgb(219, 219, 219)",
    "grey87": "rgb(222, 222, 222)",
    "grey88": "rgb(224, 224, 224)",
    "grey89": "rgb(227, 227, 227)",
    "grey9": "rgb(23, 23, 23)",
    "grey90": "rgb(229, 229, 229)",
    "grey91": "rgb(232, 232, 232)",
    "grey92": "rgb(235, 235, 235)",
    "grey93": "rgb(237, 237, 237)",
    "grey94": "rgb(240, 240, 240)",
    "grey95": "rgb(242, 242, 242)",
    "grey96": "rgb(245, 245, 245)",
    "grey97": "rgb(247, 247, 247)",
    "grey98": "rgb(250, 250, 250)",
    "grey99": "rgb(252, 252, 252)",
    "honeydew": "rgb(240, 255, 240)",
    "honeydew1": "rgb(240, 255, 240)",
    "honeydew2": "rgb(224, 238, 224)",
    "honeydew3": "rgb(193, 205, 193)",
    "honeydew4": "rgb(131, 139, 131)",
    "hotpink": "rgb(255, 105, 180)",
    "hotpink1": "rgb(255, 110, 180)",
    "hotpink2": "rgb(238, 106, 167)",
    "hotpink3": "rgb(205, 96, 144)",
    "hotpink4": "rgb(139, 58, 98)",
    "indianred": "rgb(205, 92, 92)",
    "indianred1": "rgb(255, 106, 106)",
    "indianred2": "rgb(238, 99, 99)",
    "indianred3": "rgb(205, 85, 85)",
    "indianred4": "rgb(139, 58, 58)",
    "ivory": "rgb(255, 255, 240)",
    "ivory1": "rgb(255, 255, 240)",
    "ivory2": "rgb(238, 238, 224)",
    "ivory3": "rgb(205, 205, 193)",
    "ivory4": "rgb(139, 139, 131)",
    "khaki": "rgb(240, 230, 140)",
    "khaki1": "rgb(255, 246, 143)",
    "khaki2": "rgb(238, 230, 133)",
    "khaki3": "rgb(205, 198, 115)",
    "khaki4": "rgb(139, 134, 78)",
    "lavender": "rgb(230, 230, 250)",
    "lavenderblush": "rgb(255, 240, 245)",
    "lavenderblush1": "rgb(255, 240, 245)",
    "lavenderblush2": "rgb(238, 224, 229)",
    "lavenderblush3": "rgb(205, 193, 197)",
    "lavenderblush4": "rgb(139, 131, 134)",
    "lawngreen": "rgb(124, 252, 0)",
    "lemonchiffon": "rgb(255, 250, 205)",
    "lemonchiffon1": "rgb(255, 250, 205)",
    "lemonchiffon2": "rgb(238, 233, 191)",
    "lemonchiffon3": "rgb(205, 201, 165)",
    "lemonchiffon4": "rgb(139, 137, 112)",
    "lightblue": "rgb(173, 216, 230)",
    "lightblue1": "rgb(191, 239, 255)",
    "lightblue2": "rgb(178, 223, 238)",
    "lightblue3": "rgb(154, 192, 205)",
    "lightblue4": "rgb(104, 131, 139)",
    "lightcoral": "rgb(240, 128, 128)",
    "lightcyan": "rgb(224, 255, 255)",
    "lightcyan1": "rgb(224, 255, 255)",
    "lightcyan2": "rgb(209, 238, 238)",
    "lightcyan3": "rgb(180, 205, 205)",
    "lightcyan4": "rgb(122, 139, 139)",
    "lightgoldenrod": "rgb(238, 221, 130)",
    "lightgoldenrod1": "rgb(255, 236, 139)",
    "lightgoldenrod2": "rgb(238, 220, 130)",
    "lightgoldenrod3": "rgb(205, 190, 112)",
    "lightgoldenrod4": "rgb(139, 129, 76)",
    "lightgoldenrodyellow": "rgb(250, 250, 210)",
    "lightgray": "rgb(211, 211, 211)",
    "lightgreen": "rgb(144, 238, 144)",
    "lightgrey": "rgb(211, 211, 211)",
    "lightpink": "rgb(255, 182, 193)",
    "lightpink1": "rgb(255, 174, 185)",
    "lightpink2": "rgb(238, 162, 173)",
    "lightpink3": "rgb(205, 140, 149)",
    "lightpink4": "rgb(139, 95, 101)",
    "lightsalmon": "rgb(255, 160, 122)",
    "lightsalmon1": "rgb(255, 160, 122)",
    "lightsalmon2": "rgb(238, 149, 114)",
    "lightsalmon3": "rgb(205, 129, 98)",
    "lightsalmon4": "rgb(139, 87, 66)",
    "lightseagreen": "rgb(32, 178, 170)",
    "lightskyblue": "rgb(135, 206, 250)",
    "lightskyblue1": "rgb(176, 226, 255)",
    "lightskyblue2": "rgb(164, 211, 238)",
    "lightskyblue3": "rgb(141, 182, 205)",
    "lightskyblue4": "rgb(96, 123, 139)",
    "lightslateblue": "rgb(132, 112, 255)",
    "lightslategray": "rgb(119, 136, 153)",
    "lightslategrey": "rgb(119, 136, 153)",
    "lightsteelblue": "rgb(176, 196, 222)",
    "lightsteelblue1": "rgb(202, 225, 255)",
    "lightsteelblue2": "rgb(188, 210, 238)",
    "lightsteelblue3": "rgb(162, 181, 205)",
    "lightsteelblue4": "rgb(110, 123, 139)",
    "lightyellow": "rgb(255, 255, 224)",
    "lightyellow1": "rgb(255, 255, 224)",
    "lightyellow2": "rgb(238, 238, 209)",
    "lightyellow3": "rgb(205, 205, 180)",
    "lightyellow4": "rgb(139, 139, 122)",
    "limegreen": "rgb(50, 205, 50)",
    "linen": "rgb(250, 240, 230)",
    "magenta": "rgb(255, 0, 255)",
    "magenta1": "rgb(255, 0, 255)",
    "magenta2": "rgb(238, 0, 238)",
    "magenta3": "rgb(205, 0, 205)",
    "magenta4": "rgb(139, 0, 139)",
    "maroon": "rgb(176, 48, 96)",
    "maroon1": "rgb(255, 52, 179)",
    "maroon2": "rgb(238, 48, 167)",
    "maroon3": "rgb(205, 41, 144)",
    "maroon4": "rgb(139, 28, 98)",
    "mediumaquamarine": "rgb(102, 205, 170)",
    "mediumblue": "rgb(0, 0, 205)",
    "mediumorchid": "rgb(186, 85, 211)",
    "mediumorchid1": "rgb(224, 102, 255)",
    "mediumorchid2": "rgb(209, 95, 238)",
    "mediumorchid3": "rgb(180, 82, 205)",
    "mediumorchid4": "rgb(122, 55, 139)",
    "mediumpurple": "rgb(147, 112, 219)",
    "mediumpurple1": "rgb(171, 130, 255)",
    "mediumpurple2": "rgb(159, 121, 238)",
    "mediumpurple3": "rgb(137, 104, 205)",
    "mediumpurple4": "rgb(93, 71, 139)",
    "mediumseagreen": "rgb(60, 179, 113)",
    "mediumslateblue": "rgb(123, 104, 238)",
    "mediumspringgreen": "rgb(0, 250, 154)",
    "mediumturquoise": "rgb(72, 209, 204)",
    "mediumvioletred": "rgb(199, 21, 133)",
    "midnightblue": "rgb(25, 25, 112)",
    "mintcream": "rgb(245, 255, 250)",
    "mistyrose": "rgb(255, 228, 225)",
    "mistyrose1": "rgb(255, 228, 225)",
    "mistyrose2": "rgb(238, 213, 210)",
    "mistyrose3": "rgb(205, 183, 181)",
    "mistyrose4": "rgb(139, 125, 123)",
    "moccasin": "rgb(255, 228, 181)",
    "navajowhite": "rgb(255, 222, 173)",
    "navajowhite1": "rgb(255, 222, 173)",
    "navajowhite2": "rgb(238, 207, 161)",
    "navajowhite3": "rgb(205, 179, 139)",
    "navajowhite4": "rgb(139, 121, 94)",
    "navy": "rgb(0, 0, 128)",
    "navyblue": "rgb(0, 0, 128)",
    "oldlace": "rgb(253, 245, 230)",
    "olivedrab": "rgb(107, 142, 35)",
    "olivedrab1": "rgb(192, 255, 62)",
    "olivedrab2": "rgb(179, 238, 58)",
    "olivedrab3": "rgb(154, 205, 50)",
    "olivedrab4": "rgb(105, 139, 34)",
    "orange": "rgb(255, 165, 0)",
    "orange1": "rgb(255, 165, 0)",
    "orange2": "rgb(238, 154, 0)",
    "orange3": "rgb(205, 133, 0)",
    "orange4": "rgb(139, 90, 0)",
    "orangered": "rgb(255, 69, 0)",
    "orangered1": "rgb(255, 69, 0)",
    "orangered2": "rgb(238, 64, 0)",
    "orangered3": "rgb(205, 55, 0)",
    "orangered4": "rgb(139, 37, 0)",
    "orchid": "rgb(218, 112, 214)",
    "orchid1": "rgb(255, 131, 250)",
    "orchid2": "rgb(238, 122, 233)",
    "orchid3": "rgb(205, 105, 201)",
    "orchid4": "rgb(139, 71, 137)",
    "palegoldenrod": "rgb(238, 232, 170)",
    "palegreen": "rgb(152, 251, 152)",
    "palegreen1": "rgb(154, 255, 154)",
    "palegreen2": "rgb(144, 238, 144)",
    "palegreen3": "rgb(124, 205, 124)",
    "palegreen4": "rgb(84, 139, 84)",
    "paleturquoise": "rgb(175, 238, 238)",
    "paleturquoise1": "rgb(187, 255, 255)",
    "paleturquoise2": "rgb(174, 238, 238)",
    "paleturquoise3": "rgb(150, 205, 205)",
    "paleturquoise4": "rgb(102, 139, 139)",
    "palevioletred": "rgb(219, 112, 147)",
    "palevioletred1": "rgb(255, 130, 171)",
    "palevioletred2": "rgb(238, 121, 159)",
    "palevioletred3": "rgb(205, 104, 137)",
    "palevioletred4": "rgb(139, 71, 93)",
    "papayawhip": "rgb(255, 239, 213)",
    "peachpuff": "rgb(255, 218, 185)",
    "peachpuff1": "rgb(255, 218, 185)",
    "peachpuff2": "rgb(238, 203, 173)",
    "peachpuff3": "rgb(205, 175, 149)",
    "peachpuff4": "rgb(139, 119, 101)",
    "peru": "rgb(205, 133, 63)",
    "pink": "rgb(255, 192, 203)",
    "pink1": "rgb(255, 181, 197)",
    "pink2": "rgb(238, 169, 184)",
    "pink3": "rgb(205, 145, 158)",
    "pink4": "rgb(139, 99, 108)",
    "plum": "rgb(221, 160, 221)",
    "plum1": "rgb(255, 187, 255)",
    "plum2": "rgb(238, 174, 238)",
    "plum3": "rgb(205, 150, 205)",
    "plum4": "rgb(139, 102, 139)",
    "powderblue": "rgb(176, 224, 230)",
    "purple": "rgb(160, 32, 240)",
    "purple1": "rgb(155, 48, 255)",
    "purple2": "rgb(145, 44, 238)",
    "purple3": "rgb(125, 38, 205)",
    "purple4": "rgb(85, 26, 139)",
    "red": "rgb(255, 0, 0)",
    "red1": "rgb(255, 0, 0)",
    "red2": "rgb(238, 0, 0)",
    "red3": "rgb(205, 0, 0)",
    "red4": "rgb(139, 0, 0)",
    "rosybrown": "rgb(188, 143, 143)",
    "rosybrown1": "rgb(255, 193, 193)",
    "rosybrown2": "rgb(238, 180, 180)",
    "rosybrown3": "rgb(205, 155, 155)",
    "rosybrown4": "rgb(139, 105, 105)",
    "royalblue": "rgb(65, 105, 225)",
    "royalblue1": "rgb(72, 118, 255)",
    "royalblue2": "rgb(67, 110, 238)",
    "royalblue3": "rgb(58, 95, 205)",
    "royalblue4": "rgb(39, 64, 139)",
    "saddlebrown": "rgb(139, 69, 19)",
    "salmon": "rgb(250, 128, 114)",
    "salmon1": "rgb(255, 140, 105)",
    "salmon2": "rgb(238, 130, 98)",
    "salmon3": "rgb(205, 112, 84)",
    "salmon4": "rgb(139, 76, 57)",
    "sandybrown": "rgb(244, 164, 96)",
    "seagreen": "rgb(46, 139, 87)",
    "seagreen1": "rgb(84, 255, 159)",
    "seagreen2": "rgb(78, 238, 148)",
    "seagreen3": "rgb(67, 205, 128)",
    "seagreen4": "rgb(46, 139, 87)",
    "seashell": "rgb(255, 245, 238)",
    "seashell1": "rgb(255, 245, 238)",
    "seashell2": "rgb(238, 229, 222)",
    "seashell3": "rgb(205, 197, 191)",
    "seashell4": "rgb(139, 134, 130)",
    "sienna": "rgb(160, 82, 45)",
    "sienna1": "rgb(255, 130, 71)",
    "sienna2": "rgb(238, 121, 66)",
    "sienna3": "rgb(205, 104, 57)",
    "sienna4": "rgb(139, 71, 38)",
    "skyblue": "rgb(135, 206, 235)",
    "skyblue1": "rgb(135, 206, 255)",
    "skyblue2": "rgb(126, 192, 238)",
    "skyblue3": "rgb(108, 166, 205)",
    "skyblue4": "rgb(74, 112, 139)",
    "slateblue": "rgb(106, 90, 205)",
    "slateblue1": "rgb(131, 111, 255)",
    "slateblue2": "rgb(122, 103, 238)",
    "slateblue3": "rgb(105, 89, 205)",
    "slateblue4": "rgb(71, 60, 139)",
    "slategray": "rgb(112, 128, 144)",
    "slategray1": "rgb(198, 226, 255)",
    "slategray2": "rgb(185, 211, 238)",
    "slategray3": "rgb(159, 182, 205)",
    "slategray4": "rgb(108, 123, 139)",
    "slategrey": "rgb(112, 128, 144)",
    "snow": "rgb(255, 250, 250)",
    "snow1": "rgb(255, 250, 250)",
    "snow2": "rgb(238, 233, 233)",
    "snow3": "rgb(205, 201, 201)",
    "snow4": "rgb(139, 137, 137)",
    "springgreen": "rgb(0, 255, 127)",
    "springgreen1": "rgb(0, 255, 127)",
    "springgreen2": "rgb(0, 238, 118)",
    "springgreen3": "rgb(0, 205, 102)",
    "springgreen4": "rgb(0, 139, 69)",
    "steelblue": "rgb(70, 130, 180)",
    "steelblue1": "rgb(99, 184, 255)",
    "steelblue2": "rgb(92, 172, 238)",
    "steelblue3": "rgb(79, 148, 205)",
    "steelblue4": "rgb(54, 100, 139)",
    "tan": "rgb(210, 180, 140)",
    "tan1": "rgb(255, 165, 79)",
    "tan2": "rgb(238, 154, 73)",
    "tan3": "rgb(205, 133, 63)",
    "tan4": "rgb(139, 90, 43)",
    "thistle": "rgb(216, 191, 216)",
    "thistle1": "rgb(255, 225, 255)",
    "thistle2": "rgb(238, 210, 238)",
    "thistle3": "rgb(205, 181, 205)",
    "thistle4": "rgb(139, 123, 139)",
    "tomato": "rgb(255, 99, 71)",
    "tomato1": "rgb(255, 99, 71)",
    "tomato2": "rgb(238, 92, 66)",
    "tomato3": "rgb(205, 79, 57)",
    "tomato4": "rgb(139, 54, 38)",
    "turquoise": "rgb(64, 224, 208)",
    "turquoise1": "rgb(0, 245, 255)",
    "turquoise2": "rgb(0, 229, 238)",
    "turquoise3": "rgb(0, 197, 205)",
    "turquoise4": "rgb(0, 134, 139)",
    "violet": "rgb(238, 130, 238)",
    "violetred": "rgb(208, 32, 144)",
    "violetred1": "rgb(255, 62, 150)",
    "violetred2": "rgb(238, 58, 140)",
    "violetred3": "rgb(205, 50, 120)",
    "violetred4": "rgb(139, 34, 82)",
    "wheat": "rgb(245, 222, 179)",
    "wheat1": "rgb(255, 231, 186)",
    "wheat2": "rgb(238, 216, 174)",
    "wheat3": "rgb(205, 186, 150)",
    "wheat4": "rgb(139, 126, 102)",
    "white": "rgb(255, 255, 255)",
    "whitesmoke": "rgb(245, 245, 245)",
    "yellow": "rgb(255, 255, 0)",
    "yellow1": "rgb(255, 255, 0)",
    "yellow2": "rgb(238, 238, 0)",
    "yellow3": "rgb(205, 205, 0)",
    "yellow4": "rgb(139, 139, 0)",
    "yellowgreen": "rgb(154, 205, 50)"
  };
  // SOURCE FILE: libdot/js/lib_f.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  /**
   * Grab bag of utility functions.
   */
  lib.f = {};
  
  /**
   * Replace variable references in a string.
   *
   * Variables are of the form %FUNCTION(VARNAME).  FUNCTION is an optional
   * escape function to apply to the value.
   *
   * For example
   *   lib.f.replaceVars("%(greeting), %encodeURIComponent(name)",
   *                     { greeting: "Hello",
   *                       name: "Google+" });
   *
   * Will result in "Hello, Google%2B".
   */
  lib.f.replaceVars = function(str, vars) {
    return str.replace(/%([a-z]*)\(([^\)]+)\)/gi, function(match, fn, varname) {
        if (typeof vars[varname] == 'undefined')
          throw 'Unknown variable: ' + varname;
  
        var rv = vars[varname];
  
        if (fn in lib.f.replaceVars.functions) {
          rv = lib.f.replaceVars.functions[fn](rv);
        } else if (fn) {
          throw 'Unknown escape function: ' + fn;
        }
  
        return rv;
      });
  };
  
  /**
   * Functions that can be used with replaceVars.
   *
   * Clients can add to this list to extend lib.f.replaceVars().
   */
  lib.f.replaceVars.functions = {
    encodeURI: encodeURI,
    encodeURIComponent: encodeURIComponent,
    escapeHTML: function(str) {
      var map = {
        '<': '&lt;',
        '>': '&gt;',
        '&': '&amp;',
        '"': '&quot;',
        "'": '&#39;'
      };
  
      return str.replace(/[<>&\"\']/g, function(m) { return map[m] });
    }
  };
  
  /**
   * Get the list of accepted UI languages.
   *
   * @param {function(Array)} callback Function to invoke with the results.  The
   *     parameter is a list of locale names.
   */
  lib.f.getAcceptLanguages = function(callback) {
    if (window.chrome && chrome.i18n) {
      chrome.i18n.getAcceptLanguages(callback);
    } else {
      setTimeout(function() {
          callback([navigator.language.replace(/-/g, '_')]);
        }, 0);
    }
  };
  
  /**
   * Parse a query string into a hash.
   *
   * This takes a url query string in the form 'name1=value&name2=value' and
   * converts it into an object of the form { name1: 'value', name2: 'value' }.
   * If a given name appears multiple times in the query string, only the
   * last value will appear in the result.
   *
   * Names and values are passed through decodeURIComponent before being added
   * to the result object.
   *
   * @param {string} queryString The string to parse.  If it starts with a
   *     leading '?', the '?' will be ignored.
   */
  lib.f.parseQuery = function(queryString) {
    if (queryString.substr(0, 1) == '?')
      queryString = queryString.substr(1);
  
    var rv = {};
  
    var pairs = queryString.split('&');
    for (var i = 0; i < pairs.length; i++) {
      var pair = pairs[i].split('=');
      rv[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);
    }
  
    return rv;
  };
  
  lib.f.getURL = function(path) {
    if (window.chrome && chrome.runtime && chrome.runtime.getURL)
      return chrome.runtime.getURL(path);
  
    return path;
  };
  
  /**
   * Clamp a given integer to a specified range.
   *
   * @param {integer} v The value to be clamped.
   * @param {integer} min The minimum acceptable value.
   * @param {integer} max The maximum acceptable value.
   */
  lib.f.clamp = function(v, min, max) {
    if (v < min)
      return min;
    if (v > max)
      return max;
    return v;
  };
  
  /**
   * Left pad a string to a given length using a given character.
   *
   * @param {string} str The string to pad.
   * @param {integer} length The desired length.
   * @param {string} opt_ch The optional padding character, defaults to ' '.
   * @return {string} The padded string.
   */
  lib.f.lpad = function(str, length, opt_ch) {
    str = String(str);
    opt_ch = opt_ch || ' ';
  
    while (str.length < length)
      str = opt_ch + str;
  
    return str;
  };
  
  /**
   * Left pad a number to a given length with leading zeros.
   *
   * @param {string|integer} number The number to pad.
   * @param {integer} length The desired length.
   * @return {string} The padded number as a string.
   */
  lib.f.zpad = function(number, length) {
    return lib.f.lpad(number, length, '0');
  };
  
  /**
   * Return a string containing a given number of space characters.
   *
   * This method maintains a static cache of the largest amount of whitespace
   * ever requested.  It shouldn't be used to generate an insanely huge amount of
   * whitespace.
   *
   * @param {integer} length The desired amount of whitespace.
   * @param {string} A string of spaces of the requested length.
   */
  lib.f.getWhitespace = function(length) {
    if (length == 0)
      return '';
  
    var f = this.getWhitespace;
    if (!f.whitespace)
      f.whitespace = '          ';
  
    while (length > f.whitespace.length) {
      f.whitespace += f.whitespace;
    }
  
    return f.whitespace.substr(0, length);
  };
  
   /**
   * Ensure that a function is called within a certain time limit.
   *
   * Simple usage looks like this...
   *
   *  lib.registerInit(lib.f.alarm(onInit));
   *
   * This will log a warning to the console if onInit() is not invoked within
   * 5 seconds.
   *
   * If you're performing some operation that may take longer than 5 seconds you
   * can pass a duration in milliseconds as the optional second parameter.
   *
   * If you pass a string identifier instead of a callback function, you'll get a
   * wrapper generator rather than a single wrapper.  Each call to the
   * generator will return a wrapped version of the callback wired to
   * a shared timeout.  This is for cases where you want to ensure that at least
   * one of a set of callbacks is invoked before a timeout expires.
   *
   *   var alarm = lib.f.alarm('fetch object');
   *   lib.foo.fetchObject(alarm(onSuccess), alarm(onFailure));
   *
   * @param {function(*)} callback The function to wrap in an alarm.
   * @param {int} opt_ms Optional number of milliseconds to wait before raising
   *     an alarm.  Default is 5000 (5 seconds).
   * @return {function} If callback is a function then the return value will be
   *     the wrapped callback.  If callback is a string then the return value will
   *     be a function that generates new wrapped callbacks.
   */
  lib.f.alarm = function(callback, opt_ms) {
    var ms = opt_ms || 5 * 1000;
    var stack = lib.f.getStack(1);
  
    return (function() {
      // This outer function is called immediately.  It's here to capture a new
      // scope for the timeout variable.
  
      // The 'timeout' variable is shared by this timeout function, and the
      // callback wrapper.
      var timeout = setTimeout(function() {
        var name = (typeof callback == 'string') ? name : callback.name;
        name = name ? (': ' + name) : '';
        console.warn('lib.f.alarm: timeout expired: ' + (ms / 1000) + 's' + name);
        console.log(stack);
        timeout = null;
      }, ms);
  
      var wrapperGenerator = function(callback) {
        return function() {
          if (timeout) {
            clearTimeout(timeout);
            timeout = null;
          }
  
          return callback.apply(null, arguments);
        }
      };
  
      if (typeof callback == 'string')
        return wrapperGenerator;
  
      return wrapperGenerator(callback);
    })();
  };
  
  /**
   * Return the current call stack after skipping a given number of frames.
   *
   * This method is intended to be used for debugging only.  It returns an
   * Object instead of an Array, because the console stringifies arrays by
   * default and that's not what we want.
   *
   * A typical call might look like...
   *
   *    console.log('Something wicked this way came', lib.f.getStack());
   *    //                         Notice the comma ^
   *
   * This would print the message to the js console, followed by an object
   * which can be clicked to reveal the stack.
   *
   * @param {number} opt_ignoreFrames The optional number of stack frames to
   *     ignore.  The actual 'getStack' call is always ignored.
   */
  lib.f.getStack = function(opt_ignoreFrames) {
    var ignoreFrames = opt_ignoreFrames ? opt_ignoreFrames + 2 : 2;
  
    var stackArray;
  
    try {
      throw new Error();
    } catch (ex) {
      stackArray = ex.stack.split('\n');
    }
  
    var stackObject = {};
    for (var i = ignoreFrames; i < stackArray.length; i++) {
      stackObject[i - ignoreFrames] = stackArray[i].replace(/^\s*at\s+/, '');
    }
  
    return stackObject;
  };
  
  /**
   * Divides the two numbers and floors the results, unless the remainder is less
   * than an incredibly small value, in which case it returns the ceiling.
   * This is useful when the number are truncated approximations of longer
   * values, and so doing division with these numbers yields a result incredibly
   * close to a whole number.
   *
   * @param {number} numerator
   * @param {number} denominator
   * @return {number}
   */
  lib.f.smartFloorDivide = function(numerator,  denominator) {
    var val = numerator / denominator;
    var ceiling = Math.ceil(val);
    if (ceiling - val < .0001) {
      return ceiling;
    } else {
      return Math.floor(val);
    }
  };
  // SOURCE FILE: libdot/js/lib_message_manager.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  /**
   * MessageManager class handles internationalized strings.
   *
   * Note: chrome.i18n isn't sufficient because...
   *     1. There's a bug in chrome that makes it unavailable in iframes:
   *        http://crbug.com/130200
   *     2. The client code may not be packaged in a Chrome extension.
   *     3. The client code may be part of a library packaged in a third-party
   *        Chrome extension.
   *
   * @param {Array} languages List of languages to load, in the order they
   *     should be loaded.  Newer messages replace older ones.  'en' is
   *     automatically added as the first language if it is not already present.
   */
  lib.MessageManager = function(languages) {
    this.languages_ = languages.map(
        function(el) { return el.replace(/-/g, '_') });
  
    if (this.languages_.indexOf('en') == -1)
      this.languages_.unshift('en');
  
    this.messages = {};
  };
  
  /**
   * Add message definitions to the message manager.
   *
   * This takes an object of the same format of a Chrome messages.json file.  See
   * <http://code.google.com/chrome/extensions/i18n-messages.html>.
   */
  lib.MessageManager.prototype.addMessages = function(defs) {
    for (var key in defs) {
      var def = defs[key];
  
      if (!def.placeholders) {
        this.messages[key] = def.message;
      } else {
        // Replace "$NAME$" placeholders with "$1", etc.
        this.messages[key] = def.message.replace(
            /\$([a-z][^\s\$]+)\$/ig,
            function(m, name) {
              return defs[key].placeholders[name.toLowerCase()].content;
            });
      }
    }
  };
  
  /**
   * Load the first available language message bundle.
   *
   * @param {string} pattern A url pattern containing a "$1" where the locale
   *     name should go.
   * @param {function(Array,Array)} onComplete Function to be called when loading
   *     is complete.  The two arrays are the list of successful and failed
   *     locale names.  If the first parameter is length 0, no locales were
   *     loaded.
   */
  lib.MessageManager.prototype.findAndLoadMessages = function(
      pattern, onComplete) {
    var languages = this.languages_.concat();
    var loaded = [];
    var failed = [];
  
    function onLanguageComplete(state) {
      if (state) {
        loaded = languages.shift();
      } else {
        failed = languages.shift();
      }
  
      if (languages.length) {
        tryNextLanguage();
      } else {
        onComplete(loaded, failed);
      }
    }
  
    var tryNextLanguage = function() {
      this.loadMessages(this.replaceReferences(pattern, languages),
                        onLanguageComplete.bind(this, true),
                        onLanguageComplete.bind(this, false));
    }.bind(this);
  
    tryNextLanguage();
  };
  
  /**
   * Load messages from a messages.json file.
   */
  lib.MessageManager.prototype.loadMessages = function(
      url, onSuccess, opt_onError) {
    var xhr = new XMLHttpRequest();
  
    xhr.onloadend = function() {
      if (xhr.status != 200) {
        if (opt_onError)
          opt_onError(xhr.status);
  
        return;
      }
  
      this.addMessages(JSON.parse(xhr.responseText));
      onSuccess();
    }.bind(this);
  
    xhr.open('GET', url);
    xhr.send();
  };
  
  /**
   * Replace $1...$n references with the elements of the args array.
   *
   * @param {string} msg String containing the message and argument references.
   * @param {Array} args Array containing the argument values.
   */
  lib.MessageManager.replaceReferences = function(msg, args) {
    return msg.replace(/\$(\d+)/g, function (m, index) {
        return args[index - 1];
      });
  };
  
  /**
   * Per-instance copy of replaceReferences.
   */
  lib.MessageManager.prototype.replaceReferences =
      lib.MessageManager.replaceReferences;
  
  /**
   * Get a message by name, optionally replacing arguments too.
   *
   * @param {string} msgname String containing the name of the message to get.
   * @param {Array} opt_args Optional array containing the argument values.
   * @param {string} opt_default Optional value to return if the msgname is not
   *     found.  Returns the message name by default.
   */
  lib.MessageManager.prototype.get = function(msgname, opt_args, opt_default) {
    var message;
  
    if (msgname in this.messages) {
      message = this.messages[msgname];
  
    } else {
      if (window.chrome.i18n)
        message = chrome.i18n.getMessage(msgname);
  
      if (!message) {
        console.warn('Unknown message: ' + msgname);
        return (typeof opt_default == 'undefined') ? msgname : opt_default;
      }
    }
  
    if (!opt_args)
      return message;
  
    if (!(opt_args instanceof Array))
      opt_args = [opt_args];
  
    return this.replaceReferences(message, opt_args);
  };
  
  /**
   * Process all of the "i18n" html attributes found in a given dom fragment.
   *
   * Each i18n attribute should contain a JSON object.  The keys are taken to
   * be attribute names, and the values are message names.
   *
   * If the JSON object has a "_" (underscore) key, it's value is used as the
   * textContent of the element.
   *
   * Message names can refer to other attributes on the same element with by
   * prefixing with a dollar sign.  For example...
   *
   *   <button id='send-button'
   *           i18n='{"aria-label": "$id", "_": "SEND_BUTTON_LABEL"}'
   *           ></button>
   *
   * The aria-label message name will be computed as "SEND_BUTTON_ARIA_LABEL".
   * Notice that the "id" attribute was appended to the target attribute, and
   * the result converted to UPPER_AND_UNDER style.
   */
  lib.MessageManager.prototype.processI18nAttributes = function(dom) {
    // Convert the "lower-and-dashes" attribute names into
    // "UPPER_AND_UNDER" style.
    function thunk(str) { return str.replace(/-/g, '_').toUpperCase() }
  
    var nodes = dom.querySelectorAll('[i18n]');
  
    for (var i = 0; i < nodes.length; i++) {
      var node = nodes[i];
      var i18n = node.getAttribute('i18n');
  
      if (!i18n)
        continue;
  
      try {
        i18n = JSON.parse(i18n);
      } catch (ex) {
        console.error('Can\'t parse ' + node.tagName + '#' + node.id + ': ' +
                      i18n);
        throw ex;
      }
  
      for (var key in i18n) {
        var msgname = i18n[key];
        if (msgname.substr(0, 1) == '$')
          msgname = thunk(node.getAttribute(msgname.substr(1)) + '_' + key);
  
        var msg = this.get(msgname);
        if (key == '_') {
          node.textContent = msg;
        } else {
          node.setAttribute(key, msg);
        }
      }
    }
  };
  // SOURCE FILE: libdot/js/lib_preference_manager.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  /**
   * Constructor for lib.PreferenceManager objects.
   *
   * These objects deal with persisting changes to stable storage and notifying
   * consumers when preferences change.
   *
   * It is intended that the backing store could be something other than HTML5
   * storage, but there aren't any use cases at the moment.  In the future there
   * may be a chrome api to store sync-able name/value pairs, and we'd want
   * that.
   *
   * @param {lib.Storage.*} storage The storage object to use as a backing
   *     store.
   * @param {string} opt_prefix The optional prefix to be used for all preference
   *     names.  The '/' character should be used to separate levels of heirarchy,
   *     if you're going to have that kind of thing.  If provided, the prefix
   *     should start with a '/'.  If not provided, it defaults to '/'.
   */
  lib.PreferenceManager = function(storage, opt_prefix) {
    this.storage = storage;
    this.storageObserver_ = this.onStorageChange_.bind(this);
  
    this.isActive_ = false;
    this.activate();
  
    this.trace = false;
  
    var prefix = opt_prefix || '/';
    if (prefix.substr(prefix.length - 1) != '/')
      prefix += '/';
  
    this.prefix = prefix;
  
    this.prefRecords_ = {};
    this.globalObservers_ = [];
  
    this.childFactories_ = {};
  
    // Map of list-name to {map of child pref managers}
    // As in...
    //
    //  this.childLists_ = {
    //    'profile-ids': {
    //      'one': PreferenceManager,
    //      'two': PreferenceManager,
    //      ...
    //    },
    //
    //    'frob-ids': {
    //      ...
    //    }
    //  }
    this.childLists_ = {};
  };
  
  /**
   * Used internally to indicate that the current value of the preference should
   * be taken from the default value defined with the preference.
   *
   * Equality tests against this value MUST use '===' or '!==' to be accurate.
   */
  lib.PreferenceManager.prototype.DEFAULT_VALUE = new String('DEFAULT');
  
  /**
   * An individual preference.
   *
   * These objects are managed by the PreferenceManager, you shoudn't need to
   * handle them directly.
   */
  lib.PreferenceManager.Record = function(name, defaultValue) {
    this.name = name;
    this.defaultValue = defaultValue;
    this.currentValue = this.DEFAULT_VALUE;
    this.observers = [];
  };
  
  /**
   * A local copy of the DEFAULT_VALUE constant to make it less verbose.
   */
  lib.PreferenceManager.Record.prototype.DEFAULT_VALUE =
      lib.PreferenceManager.prototype.DEFAULT_VALUE;
  
  /**
   * Register a callback to be invoked when this preference changes.
   *
   * @param {function(value, string, lib.PreferenceManager} observer The function
   *     to invoke.  It will receive the new value, the name of the preference,
   *     and a reference to the PreferenceManager as parameters.
   */
  lib.PreferenceManager.Record.prototype.addObserver = function(observer) {
    this.observers.push(observer);
  };
  
  /**
   * Unregister an observer callback.
   *
   * @param {function} observer A previously registered callback.
   */
  lib.PreferenceManager.Record.prototype.removeObserver = function(observer) {
    var i = this.observers.indexOf(observer);
    if (i >= 0)
      this.observers.splice(i, 1);
  };
  
  /**
   * Fetch the value of this preference.
   */
  lib.PreferenceManager.Record.prototype.get = function() {
    if (this.currentValue === this.DEFAULT_VALUE) {
      if (/^(string|number)$/.test(typeof this.defaultValue))
        return this.defaultValue;
  
      if (typeof this.defaultValue == 'object') {
        // We want to return a COPY of the default value so that users can
        // modify the array or object without changing the default value.
        return JSON.parse(JSON.stringify(this.defaultValue));
      }
  
      return this.defaultValue;
    }
  
    return this.currentValue;
  };
  
  /**
   * Stop this preference manager from tracking storage changes.
   *
   * Call this if you're going to swap out one preference manager for another so
   * that you don't get notified about irrelevant changes.
   */
  lib.PreferenceManager.prototype.deactivate = function() {
    if (!this.isActive_)
      throw new Error('Not activated');
  
    this.isActive_ = false;
    this.storage.removeObserver(this.storageObserver_);
  };
  
  /**
   * Start tracking storage changes.
   *
   * If you previously deactivated this preference manager, you can reactivate it
   * with this method.  You don't need to call this at initialization time, as
   * it's automatically called as part of the constructor.
   */
  lib.PreferenceManager.prototype.activate = function() {
    if (this.isActive_)
      throw new Error('Already activated');
  
    this.isActive_ = true;
    this.storage.addObserver(this.storageObserver_);
  };
  
  /**
   * Read the backing storage for these preferences.
   *
   * You should do this once at initialization time to prime the local cache
   * of preference values.  The preference manager will monitor the backing
   * storage for changes, so you should not need to call this more than once.
   *
   * This function recursively reads storage for all child preference managers as
   * well.
   *
   * This function is asynchronous, if you need to read preference values, you
   * *must* wait for the callback.
   *
   * @param {function()} opt_callback Optional function to invoke when the read
   *     has completed.
   */
  lib.PreferenceManager.prototype.readStorage = function(opt_callback) {
    var pendingChildren = 0;
  
    function onChildComplete() {
      if (--pendingChildren == 0 && opt_callback)
        opt_callback();
    }
  
    var keys = Object.keys(this.prefRecords_).map(
        function(el) { return this.prefix + el }.bind(this));
  
    if (this.trace)
      console.log('Preferences read: ' + this.prefix);
  
    this.storage.getItems(keys, function(items) {
        var prefixLength = this.prefix.length;
  
        for (var key in items) {
          var value = items[key];
          var name = key.substr(prefixLength);
          var needSync = (name in this.childLists_ &&
                          (JSON.stringify(value) !=
                           JSON.stringify(this.prefRecords_[name].currentValue)));
  
          this.prefRecords_[name].currentValue = value;
  
          if (needSync) {
            pendingChildren++;
            this.syncChildList(name, onChildComplete);
          }
        }
  
        if (pendingChildren == 0 && opt_callback)
          setTimeout(opt_callback);
      }.bind(this));
  };
  
  /**
   * Define a preference.
   *
   * This registers a name, default value, and onChange handler for a preference.
   *
   * @param {string} name The name of the preference.  This will be prefixed by
   *     the prefix of this PreferenceManager before written to local storage.
   * @param {string|number|boolean|Object|Array|null} value The default value of
   *     this preference.  Anything that can be represented in JSON is a valid
   *     default value.
   * @param {function(value, string, lib.PreferenceManager} opt_observer A
   *     function to invoke when the preference changes.  It will receive the new
   *     value, the name of the preference, and a reference to the
   *     PreferenceManager as parameters.
   */
  lib.PreferenceManager.prototype.definePreference = function(
      name, value, opt_onChange) {
  
    var record = this.prefRecords_[name];
    if (record) {
      this.changeDefault(name, value);
    } else {
      record = this.prefRecords_[name] =
          new lib.PreferenceManager.Record(name, value);
    }
  
    if (opt_onChange)
      record.addObserver(opt_onChange);
  };
  
  /**
   * Define multiple preferences with a single function call.
   *
   * @param {Array} defaults An array of 3-element arrays.  Each three element
   *     array should contain the [key, value, onChange] parameters for a
   *     preference.
   */
  lib.PreferenceManager.prototype.definePreferences = function(defaults) {
    for (var i = 0; i < defaults.length; i++) {
      this.definePreference(defaults[i][0], defaults[i][1], defaults[i][2]);
    }
  };
  
  /**
   * Define an ordered list of child preferences.
   *
   * Child preferences are different from just storing an array of JSON objects
   * in that each child is an instance of a preference manager.  This means you
   * can observe changes to individual child preferences, and get some validation
   * that you're not reading or writing to an undefined child preference value.
   *
   * @param {string} listName A name for the list of children.  This must be
   *     unique in this preference manager.  The listName will become a
   *     preference on this PreferenceManager used to store the ordered list of
   *     child ids.  It is also used in get/add/remove operations to identify the
   *     list of children to operate on.
   * @param {function} childFactory A function that will be used to generate
   *     instances of these childred.  The factory function will receive the
   *     parent lib.PreferenceManager object and a unique id for the new child
   *     preferences.
   */
  lib.PreferenceManager.prototype.defineChildren = function(
      listName, childFactory) {
  
    // Define a preference to hold the ordered list of child ids.
    this.definePreference(listName, [],
                          this.onChildListChange_.bind(this, listName));
    this.childFactories_[listName] = childFactory;
    this.childLists_[listName] = {};
  };
  
  /**
   * Register to observe preference changes.
   *
   * @param {Function} global A callback that will happen for every preference.
   *     Pass null if you don't need one.
   * @param {Object} map A map of preference specific callbacks.  Pass null if
   *     you don't need any.
   */
  lib.PreferenceManager.prototype.addObservers = function(global, map) {
    if (global && typeof global != 'function')
      throw new Error('Invalid param: globals');
  
    if (global)
      this.globalObservers_.push(global);
  
    if (!map)
      return;
  
    for (var name in map) {
      if (!(name in this.prefRecords_))
        throw new Error('Unknown preference: ' + name);
  
      this.prefRecords_[name].addObserver(map[name]);
    }
  };
  
  /**
   * Dispatch the change observers for all known preferences.
   *
   * It may be useful to call this after readStorage completes, in order to
   * get application state in sync with user preferences.
   *
   * This can be used if you've changed a preference manager out from under
   * a live object, for example when switching to a different prefix.
   */
  lib.PreferenceManager.prototype.notifyAll = function() {
    for (var name in this.prefRecords_) {
      this.notifyChange_(name);
    }
  };
  
  /**
   * Notify the change observers for a given preference.
   *
   * @param {string} name The name of the preference that changed.
   */
  lib.PreferenceManager.prototype.notifyChange_ = function(name) {
    var record = this.prefRecords_[name];
    if (!record)
      throw new Error('Unknown preference: ' + name);
  
    var currentValue = record.get();
  
    for (var i = 0; i < this.globalObservers_.length; i++)
      this.globalObservers_[i](name, currentValue);
  
    for (var i = 0; i < record.observers.length; i++) {
      record.observers[i](currentValue, name, this);
    }
  };
  
  /**
   * Create a new child PreferenceManager for the given child list.
   *
   * The optional hint parameter is an opaque prefix added to the auto-generated
   * unique id for this child.  Your child factory can parse out the prefix
   * and use it.
   *
   * @param {string} listName The child list to create the new instance from.
   * @param {string} opt_hint Optional hint to include in the child id.
   * @param {string} opt_id Optional id to override the generated id.
   */
  lib.PreferenceManager.prototype.createChild = function(listName, opt_hint,
                                                         opt_id) {
    var ids = this.get(listName);
    var id;
  
    if (opt_id) {
      id = opt_id;
      if (ids.indexOf(id) != -1)
        throw new Error('Duplicate child: ' + listName + ': ' + id);
  
    } else {
      // Pick a random, unique 4-digit hex identifier for the new profile.
      while (!id || ids.indexOf(id) != -1) {
        id = Math.floor(Math.random() * 0xffff + 1).toString(16);
        id = lib.f.zpad(id, 4);
        if (opt_hint)
          id = opt_hint + ':' + id;
      }
    }
  
    var childManager = this.childFactories_[listName](this, id);
    childManager.trace = this.trace;
    childManager.resetAll();
  
    this.childLists_[listName][id] = childManager;
  
    ids.push(id);
    this.set(listName, ids);
  
    return childManager;
  };
  
  /**
   * Remove a child preferences instance.
   *
   * Removes a child preference manager and clears any preferences stored in it.
   *
   * @param {string} listName The name of the child list containing the child to
   *     remove.
   * @param {string} id The child ID.
   */
  lib.PreferenceManager.prototype.removeChild = function(listName, id) {
    var prefs = this.getChild(listName, id);
    prefs.resetAll();
  
    var ids = this.get(listName);
    var i = ids.indexOf(id);
    if (i != -1) {
      ids.splice(i, 1);
      this.set(listName, ids);
    }
  
    delete this.childLists_[listName][id];
  };
  
  /**
   * Return a child PreferenceManager instance for a given id.
   *
   * If the child list or child id is not known this will return the specified
   * default value or throw an exception if no default value is provided.
   *
   * @param {string} listName The child list to look in.
   * @param {string} id The child ID.
   * @param {*} opt_default The optional default value to return if the child
   *     is not found.
   */
  lib.PreferenceManager.prototype.getChild = function(listName, id, opt_default) {
    if (!(listName in this.childLists_))
      throw new Error('Unknown child list: ' + listName);
  
    var childList = this.childLists_[listName];
    if (!(id in childList)) {
      if (typeof opt_default == 'undefined')
        throw new Error('Unknown "' + listName + '" child: ' + id);
  
      return opt_default;
    }
  
    return childList[id];
  };
  
  /**
   * Calculate the difference between two lists of child ids.
   *
   * Given two arrays of child ids, this function will return an object
   * with "added", "removed", and "common" properties.  Each property is
   * a map of child-id to `true`.  For example, given...
   *
   *    a = ['child-x', 'child-y']
   *    b = ['child-y']
   *
   *    diffChildLists(a, b) =>
   *      { added: { 'child-x': true }, removed: {}, common: { 'child-y': true } }
   *
   * The added/removed properties assume that `a` is the current list.
   *
   * @param {Array[string]} a The most recent list of child ids.
   * @param {Array[string]} b An older list of child ids.
   * @return {Object} An object with added/removed/common properties.
   */
  lib.PreferenceManager.diffChildLists = function(a, b) {
    var rv = {
      added: {},
      removed: {},
      common: {},
    };
  
    for (var i = 0; i < a.length; i++) {
      if (b.indexOf(a[i]) != -1) {
        rv.common[a[i]] = true;
      } else {
        rv.added[a[i]] = true;
      }
    }
  
    for (var i = 0; i < b.length; i++) {
      if ((b[i] in rv.added) || (b[i] in rv.common))
        continue;
  
      rv.removed[b[i]] = true;
    }
  
    return rv;
  };
  
  /**
   * Synchronize a list of child PreferenceManagers instances with the current
   * list stored in prefs.
   *
   * This will instantiate any missing managers and read current preference values
   * from storage.  Any active managers that no longer appear in preferences will
   * be deleted.
   *
   * @param {string} listName The child list to synchronize.
   * @param {function()} opt_callback Optional function to invoke when the sync
   *     is complete.
   */
  lib.PreferenceManager.prototype.syncChildList = function(
      listName, opt_callback) {
  
    var pendingChildren = 0;
    function onChildStorage() {
      if (--pendingChildren == 0 && opt_callback)
        opt_callback();
    }
  
    // The list of child ids that we *should* have a manager for.
    var currentIds = this.get(listName);
  
    // The known managers at the start of the sync.  Any manager still in this
    // list at the end should be discarded.
    var oldIds = Object.keys(this.childLists_[listName]);
  
    var rv = lib.PreferenceManager.diffChildLists(currentIds, oldIds);
  
    for (var i = 0; i < currentIds.length; i++) {
      var id = currentIds[i];
  
      var managerIndex = oldIds.indexOf(id);
      if (managerIndex >= 0)
        oldIds.splice(managerIndex, 1);
  
      if (!this.childLists_[listName][id]) {
        var childManager = this.childFactories_[listName](this, id);
        if (!childManager) {
          console.warn('Unable to restore child: ' + listName + ': ' + id);
          continue;
        }
  
        childManager.trace = this.trace;
        this.childLists_[listName][id] = childManager;
        pendingChildren++;
        childManager.readStorage(onChildStorage);
      }
    }
  
    for (var i = 0; i < oldIds.length; i++) {
      delete this.childLists_[listName][oldIds[i]];
    }
  
    if (!pendingChildren && opt_callback)
      setTimeout(opt_callback);
  };
  
  /**
   * Reset a preference to its default state.
   *
   * This will dispatch the onChange handler if the preference value actually
   * changes.
   *
   * @param {string} name The preference to reset.
   */
  lib.PreferenceManager.prototype.reset = function(name) {
    var record = this.prefRecords_[name];
    if (!record)
      throw new Error('Unknown preference: ' + name);
  
    this.storage.removeItem(this.prefix + name);
  
    if (record.currentValue !== this.DEFAULT_VALUE) {
      record.currentValue = this.DEFAULT_VALUE;
      this.notifyChange_(name);
    }
  };
  
  /**
   * Reset all preferences back to their default state.
   */
  lib.PreferenceManager.prototype.resetAll = function() {
    var changed = [];
  
    for (var listName in this.childLists_) {
      var childList = this.childLists_[listName];
      for (var id in childList) {
        childList[id].resetAll();
      }
    }
  
    for (var name in this.prefRecords_) {
      if (this.prefRecords_[name].currentValue !== this.DEFAULT_VALUE) {
        this.prefRecords_[name].currentValue = this.DEFAULT_VALUE;
        changed.push(name);
      }
    }
  
    var keys = Object.keys(this.prefRecords_).map(function(el) {
        return this.prefix + el;
    }.bind(this));
  
    this.storage.removeItems(keys);
  
    changed.forEach(this.notifyChange_.bind(this));
  };
  
  /**
   * Return true if two values should be considered not-equal.
   *
   * If both values are the same scalar type and compare equal this function
   * returns false (no difference), otherwise return true.
   *
   * This is used in places where we want to check if a preference has changed.
   * Rather than take the time to compare complex values we just consider them
   * to always be different.
   *
   * @param {*} a A value to compare.
   * @param {*} b A value to compare.
   */
  lib.PreferenceManager.prototype.diff = function(a, b) {
    // If the types are different, or the type is not a simple primitive one.
    if ((typeof a) !== (typeof b) ||
        !(/^(undefined|boolean|number|string)$/.test(typeof a))) {
      return true;
    }
  
    return a !== b;
  };
  
  /**
   * Change the default value of a preference.
   *
   * This is useful when subclassing preference managers.
   *
   * The function does not alter the current value of the preference, unless
   * it has the old default value.  When that happens, the change observers
   * will be notified.
   *
   * @param {string} name The name of the parameter to change.
   * @param {*} newValue The new default value for the preference.
   */
  lib.PreferenceManager.prototype.changeDefault = function(name, newValue) {
    var record = this.prefRecords_[name];
    if (!record)
      throw new Error('Unknown preference: ' + name);
  
    if (!this.diff(record.defaultValue, newValue)) {
      // Default value hasn't changed.
      return;
    }
  
    if (record.currentValue !== this.DEFAULT_VALUE) {
      // This pref has a specific value, just change the default and we're done.
      record.defaultValue = newValue;
      return;
    }
  
    record.defaultValue = newValue;
  
    this.notifyChange_(name);
  };
  
  /**
   * Change the default value of multiple preferences.
   *
   * @param {Object} map A map of name -> value pairs specifying the new default
   *     values.
   */
  lib.PreferenceManager.prototype.changeDefaults = function(map) {
    for (var key in map) {
      this.changeDefault(key, map[key]);
    }
  };
  
  /**
   * Set a preference to a specific value.
   *
   * This will dispatch the onChange handler if the preference value actually
   * changes.
   *
   * @param {string} key The preference to set.
   * @param {*} value The value to set.  Anything that can be represented in
   *     JSON is a valid value.
   */
  lib.PreferenceManager.prototype.set = function(name, newValue) {
    var record = this.prefRecords_[name];
    if (!record)
      throw new Error('Unknown preference: ' + name);
  
    var oldValue = record.get();
  
    if (!this.diff(oldValue, newValue))
      return;
  
    if (this.diff(record.defaultValue, newValue)) {
      record.currentValue = newValue;
      this.storage.setItem(this.prefix + name, newValue);
    } else {
      record.currentValue = this.DEFAULT_VALUE;
      this.storage.removeItem(this.prefix + name);
    }
  
    // We need to manually send out the notification on this instance.  If we
    // The storage event won't fire a notification because we've already changed
    // the currentValue, so it won't see a difference.  If we delayed changing
    // currentValue until the storage event, a pref read immediately after a write
    // would return the previous value.
    //
    // The notification is in a timeout so clients don't accidentally depend on
    // a synchronous notification.
    setTimeout(this.notifyChange_.bind(this, name), 0);
  };
  
  /**
   * Get the value of a preference.
   *
   * @param {string} key The preference to get.
   */
  lib.PreferenceManager.prototype.get = function(name) {
    var record = this.prefRecords_[name];
    if (!record)
      throw new Error('Unknown preference: ' + name);
  
    return record.get();
  };
  
  /**
   * Return all non-default preferences as a JSON onject.
   *
   * This includes any nested preference managers as well.
   */
  lib.PreferenceManager.prototype.exportAsJson = function() {
    var rv = {};
  
    for (var name in this.prefRecords_) {
      if (name in this.childLists_) {
        rv[name] = [];
        var childIds = this.get(name);
        for (var i = 0; i < childIds.length; i++) {
          var id = childIds[i];
          rv[name].push({id: id, json: this.getChild(name, id).exportAsJson()});
        }
  
      } else {
        var record = this.prefRecords_[name];
        if (record.currentValue != this.DEFAULT_VALUE)
          rv[name] = record.currentValue;
      }
    }
  
    return rv;
  };
  
  /**
   * Import a JSON blob of preferences previously generated with exportAsJson.
   *
   * This will create nested preference managers as well.
   */
  lib.PreferenceManager.prototype.importFromJson = function(json) {
    for (var name in json) {
      if (name in this.childLists_) {
        var childList = json[name];
        for (var i = 0; i < childList.length; i++) {
          var id = childList[i].id;
  
          var childPrefManager = this.childLists_[name][id];
          if (!childPrefManager)
            childPrefManager = this.createChild(name, null, id);
  
          childPrefManager.importFromJson(childList[i].json);
        }
  
      } else {
        this.set(name, json[name]);
      }
    }
  };
  
  /**
   * Called when one of the child list preferences changes.
   */
  lib.PreferenceManager.prototype.onChildListChange_ = function(listName) {
    this.syncChildList(listName);
  };
  
  /**
   * Called when a key in the storage changes.
   */
  lib.PreferenceManager.prototype.onStorageChange_ = function(map) {
    for (var key in map) {
      if (this.prefix) {
        if (key.lastIndexOf(this.prefix, 0) != 0)
          continue;
      }
  
      var name = key.substr(this.prefix.length);
  
      if (!(name in this.prefRecords_)) {
        // Sometimes we'll get notified about prefs that are no longer defined.
        continue;
      }
  
      var record = this.prefRecords_[name];
  
      var newValue = map[key].newValue;
      var currentValue = record.currentValue;
      if (currentValue === record.DEFAULT_VALUE)
        currentValue = (void 0);
  
      if (this.diff(currentValue, newValue)) {
        if (typeof newValue == 'undefined') {
          record.currentValue = record.DEFAULT_VALUE;
        } else {
          record.currentValue = newValue;
        }
  
        this.notifyChange_(name);
      }
    }
  };
  // SOURCE FILE: libdot/js/lib_resource.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  /**
   * Storage for canned resources.
   *
   * These are usually non-JavaScript things that are collected during a build
   * step and converted into a series of 'lib.resource.add(...)' calls.  See
   * the "@resource" directive from libdot/bin/concat.sh for the canonical use
   * case.
   *
   * This is global storage, so you should prefix your resource names to avoid
   * collisions.
   */
  lib.resource = {
    resources_: {}
  };
  
  /**
   * Add a resource.
   *
   * @param {string} name A name for the resource.  You should prefix this to
   *   avoid collisions with resources from a shared library.
   * @param {string} type A mime type for the resource, or "raw" if not
   *   applicable.
   * @param {*} data The value of the resource.
   */
  lib.resource.add = function(name, type, data) {
    lib.resource.resources_[name] = {
      type: type,
      name: name,
      data: data
    };
  };
  
  /**
   * Retrieve a resource record.
   *
   * The resource data is stored on the "data" property of the returned object.
   *
   * @param {string} name The name of the resource to get.
   * @param {*} opt_defaultValue The optional value to return if the resource is
   *   not defined.
   * @return {object} An object with "type", "name", and "data" properties.
   */
  lib.resource.get = function(name, opt_defaultValue) {
    if (!(name in lib.resource.resources_)) {
      if (typeof opt_defaultValue == 'undefined')
        throw 'Unknown resource: ' + name;
  
      return opt_defaultValue;
    }
  
    return lib.resource.resources_[name];
  };
  
  /**
   * Retrieve resource data.
   *
   * @param {string} name The name of the resource to get.
   * @param {*} opt_defaultValue The optional value to return if the resource is
   *   not defined.
   * @return {*} The resource data.
   */
  lib.resource.getData = function(name, opt_defaultValue) {
    if (!(name in lib.resource.resources_)) {
      if (typeof opt_defaultValue == 'undefined')
        throw 'Unknown resource: ' + name;
  
      return opt_defaultValue;
    }
  
    return lib.resource.resources_[name].data;
  };
  
  /**
   * Retrieve resource as a data: url.
   *
   * @param {string} name The name of the resource to get.
   * @param {*} opt_defaultValue The optional value to return if the resource is
   *   not defined.
   * @return {*} A data: url encoded version of the resource.
   */
  lib.resource.getDataUrl = function(name, opt_defaultValue) {
    var resource = lib.resource.get(name, opt_defaultValue);
    return 'data:' + resource.type + ',' + resource.data;
  };
  // SOURCE FILE: libdot/js/lib_storage.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  /**
   * Namespace for implementations of persistent, possibly cloud-backed
   * storage.
   */
  lib.Storage = new Object();
  // SOURCE FILE: libdot/js/lib_storage_chrome.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  /**
   * chrome.storage based class with an async interface that is interchangeable
   * with other lib.Storage.* implementations.
   */
  lib.Storage.Chrome = function(storage) {
    this.storage_ = storage;
    this.observers_ = [];
  
    chrome.storage.onChanged.addListener(this.onChanged_.bind(this));
  };
  
  /**
   * Called by the storage implementation when the storage is modified.
   */
  lib.Storage.Chrome.prototype.onChanged_ = function(changes, areaname) {
    if (chrome.storage[areaname] != this.storage_)
      return;
  
    for (var i = 0; i < this.observers_.length; i++) {
      this.observers_[i](changes);
    }
  };
  
  /**
   * Register a function to observe storage changes.
   *
   * @param {function(map)} callback The function to invoke when the storage
   *     changes.
   */
  lib.Storage.Chrome.prototype.addObserver = function(callback) {
    this.observers_.push(callback);
  };
  
  /**
   * Unregister a change observer.
   *
   * @param {function} observer A previously registered callback.
   */
  lib.Storage.Chrome.prototype.removeObserver = function(callback) {
    var i = this.observers_.indexOf(callback);
    if (i != -1)
      this.observers_.splice(i, 1);
  };
  
  /**
   * Delete everything in this storage.
   *
   * @param {function(map)} callback The function to invoke when the delete
   *     has completed.
   */
  lib.Storage.Chrome.prototype.clear = function(opt_callback) {
    this.storage_.clear();
  
    if (opt_callback)
      setTimeout(opt_callback, 0);
  };
  
  /**
   * Return the current value of a storage item.
   *
   * @param {string} key The key to look up.
   * @param {function(value) callback The function to invoke when the value has
   *     been retrieved.
   */
  lib.Storage.Chrome.prototype.getItem = function(key, callback) {
    this.storage_.get(key, callback);
  };
  /**
   * Fetch the values of multiple storage items.
   *
   * @param {Array} keys The keys to look up.
   * @param {function(map) callback The function to invoke when the values have
   *     been retrieved.
   */
  
  lib.Storage.Chrome.prototype.getItems = function(keys, callback) {
    this.storage_.get(keys, callback);
  };
  
  /**
   * Set a value in storage.
   *
   * @param {string} key The key for the value to be stored.
   * @param {*} value The value to be stored.  Anything that can be serialized
   *     with JSON is acceptable.
   * @param {function()} opt_callback Optional function to invoke when the
   *     set is complete.  You don't have to wait for the set to complete in order
   *     to read the value, since the local cache is updated synchronously.
   */
  lib.Storage.Chrome.prototype.setItem = function(key, value, opt_callback) {
    var obj = {};
    obj[key] = value;
    this.storage_.set(obj, opt_callback);
  };
  
  /**
   * Set multiple values in storage.
   *
   * @param {Object} map A map of key/values to set in storage.
   * @param {function()} opt_callback Optional function to invoke when the
   *     set is complete.  You don't have to wait for the set to complete in order
   *     to read the value, since the local cache is updated synchronously.
   */
  lib.Storage.Chrome.prototype.setItems = function(obj, opt_callback) {
    this.storage_.set(obj, opt_callback);
  };
  
  /**
   * Remove an item from storage.
   *
   * @param {string} key The key to be removed.
   * @param {function()} opt_callback Optional function to invoke when the
   *     remove is complete.  You don't have to wait for the set to complete in
   *     order to read the value, since the local cache is updated synchronously.
   */
  lib.Storage.Chrome.prototype.removeItem = function(key, opt_callback) {
    this.storage_.remove(key, opt_callback);
  };
  
  /**
   * Remove multiple items from storage.
   *
   * @param {Array} keys The keys to be removed.
   * @param {function()} opt_callback Optional function to invoke when the
   *     remove is complete.  You don't have to wait for the set to complete in
   *     order to read the value, since the local cache is updated synchronously.
   */
  lib.Storage.Chrome.prototype.removeItems = function(keys, opt_callback) {
    this.storage_.remove(keys, opt_callback);
  };
  // SOURCE FILE: libdot/js/lib_storage_local.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  /**
   * window.localStorage based class with an async interface that is
   * interchangeable with other lib.Storage.* implementations.
   */
  lib.Storage.Local = function() {
    this.observers_ = [];
    this.storage_ = window.localStorage;
    window.addEventListener('storage', this.onStorage_.bind(this));
  };
  
  /**
   * Called by the storage implementation when the storage is modified.
   */
  lib.Storage.Local.prototype.onStorage_ = function(e) {
    if (e.storageArea != this.storage_)
      return;
  
    // IE throws an exception if JSON.parse is given an empty string.
    var prevValue = e.oldValue ? JSON.parse(e.oldValue) : "";
    var curValue = e.newValue ? JSON.parse(e.newValue) : "";
    var o = {};
    o[e.key] = {
      oldValue: prevValue,
      newValue: curValue
    };
  
    for (var i = 0; i < this.observers_.length; i++) {
      this.observers_[i](o);
    }
  };
  
  /**
   * Register a function to observe storage changes.
   *
   * @param {function(map)} callback The function to invoke when the storage
   *     changes.
   */
  lib.Storage.Local.prototype.addObserver = function(callback) {
    this.observers_.push(callback);
  };
  
  /**
   * Unregister a change observer.
   *
   * @param {function} observer A previously registered callback.
   */
  lib.Storage.Local.prototype.removeObserver = function(callback) {
    var i = this.observers_.indexOf(callback);
    if (i != -1)
      this.observers_.splice(i, 1);
  };
  
  /**
   * Delete everything in this storage.
   *
   * @param {function(map)} callback The function to invoke when the delete
   *     has completed.
   */
  lib.Storage.Local.prototype.clear = function(opt_callback) {
    this.storage_.clear();
  
    if (opt_callback)
      setTimeout(opt_callback, 0);
  };
  
  /**
   * Return the current value of a storage item.
   *
   * @param {string} key The key to look up.
   * @param {function(value) callback The function to invoke when the value has
   *     been retrieved.
   */
  lib.Storage.Local.prototype.getItem = function(key, callback) {
    var value = this.storage_.getItem(key);
  
    if (typeof value == 'string') {
      try {
        value = JSON.parse(value);
      } catch (e) {
        // If we can't parse the value, just return it unparsed.
      }
    }
  
    setTimeout(callback.bind(null, value), 0);
  };
  
  /**
   * Fetch the values of multiple storage items.
   *
   * @param {Array} keys The keys to look up.
   * @param {function(map) callback The function to invoke when the values have
   *     been retrieved.
   */
  lib.Storage.Local.prototype.getItems = function(keys, callback) {
    var rv = {};
  
    for (var i = keys.length - 1; i >= 0; i--) {
      var key = keys[i];
      var value = this.storage_.getItem(key);
      if (typeof value == 'string') {
        try {
          rv[key] = JSON.parse(value);
        } catch (e) {
          // If we can't parse the value, just return it unparsed.
          rv[key] = value;
        }
      } else {
        keys.splice(i, 1);
      }
    }
  
    setTimeout(callback.bind(null, rv), 0);
  };
  
  /**
   * Set a value in storage.
   *
   * @param {string} key The key for the value to be stored.
   * @param {*} value The value to be stored.  Anything that can be serialized
   *     with JSON is acceptable.
   * @param {function()} opt_callback Optional function to invoke when the
   *     set is complete.  You don't have to wait for the set to complete in order
   *     to read the value, since the local cache is updated synchronously.
   */
  lib.Storage.Local.prototype.setItem = function(key, value, opt_callback) {
    this.storage_.setItem(key, JSON.stringify(value));
  
    if (opt_callback)
    setTimeout(opt_callback, 0);
  };
  
  /**
   * Set multiple values in storage.
   *
   * @param {Object} map A map of key/values to set in storage.
   * @param {function()} opt_callback Optional function to invoke when the
   *     set is complete.  You don't have to wait for the set to complete in order
   *     to read the value, since the local cache is updated synchronously.
   */
  lib.Storage.Local.prototype.setItems = function(obj, opt_callback) {
    for (var key in obj) {
      this.storage_.setItem(key, JSON.stringify(obj[key]));
    }
  
    if (opt_callback)
    setTimeout(opt_callback, 0);
  };
  
  /**
   * Remove an item from storage.
   *
   * @param {string} key The key to be removed.
   * @param {function()} opt_callback Optional function to invoke when the
   *     remove is complete.  You don't have to wait for the set to complete in
   *     order to read the value, since the local cache is updated synchronously.
   */
  lib.Storage.Local.prototype.removeItem = function(key, opt_callback) {
    this.storage_.removeItem(key);
  
    if (opt_callback)
    setTimeout(opt_callback, 0);
  };
  
  /**
   * Remove multiple items from storage.
   *
   * @param {Array} keys The keys to be removed.
   * @param {function()} opt_callback Optional function to invoke when the
   *     remove is complete.  You don't have to wait for the set to complete in
   *     order to read the value, since the local cache is updated synchronously.
   */
  lib.Storage.Local.prototype.removeItems = function(ary, opt_callback) {
    for (var i = 0; i < ary.length; i++) {
      this.storage_.removeItem(ary[i]);
    }
  
    if (opt_callback)
    setTimeout(opt_callback, 0);
  };
  // SOURCE FILE: libdot/js/lib_storage_memory.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  /**
   * In-memory storage class with an async interface that is interchangeable with
   * other lib.Storage.* implementations.
   */
  lib.Storage.Memory = function() {
    this.observers_ = [];
    this.storage_ = {};
  };
  
  /**
   * Register a function to observe storage changes.
   *
   * @param {function(map)} callback The function to invoke when the storage
   *     changes.
   */
  lib.Storage.Memory.prototype.addObserver = function(callback) {
    this.observers_.push(callback);
  };
  
  /**
   * Unregister a change observer.
   *
   * @param {function} observer A previously registered callback.
   */
  lib.Storage.Memory.prototype.removeObserver = function(callback) {
    var i = this.observers_.indexOf(callback);
    if (i != -1)
      this.observers_.splice(i, 1);
  };
  
  /**
   * Delete everything in this storage.
   *
   * @param {function(map)} callback The function to invoke when the delete
   *     has completed.
   */
  lib.Storage.Memory.prototype.clear = function(opt_callback) {
    var e = {};
    for (var key in this.storage_) {
      e[key] = {oldValue: this.storage_[key], newValue: (void 0)};
    }
  
    this.storage_ = {};
  
    setTimeout(function() {
      for (var i = 0; i < this.observers_.length; i++) {
        this.observers_[i](e);
      }
    }.bind(this), 0);
  
    if (opt_callback)
      setTimeout(opt_callback, 0);
  };
  
  /**
   * Return the current value of a storage item.
   *
   * @param {string} key The key to look up.
   * @param {function(value) callback The function to invoke when the value has
   *     been retrieved.
   */
  lib.Storage.Memory.prototype.getItem = function(key, callback) {
    var value = this.storage_[key];
  
    if (typeof value == 'string') {
      try {
        value = JSON.parse(value);
      } catch (e) {
        // If we can't parse the value, just return it unparsed.
      }
    }
  
    setTimeout(callback.bind(null, value), 0);
  };
  
  /**
   * Fetch the values of multiple storage items.
   *
   * @param {Array} keys The keys to look up.
   * @param {function(map) callback The function to invoke when the values have
   *     been retrieved.
   */
  lib.Storage.Memory.prototype.getItems = function(keys, callback) {
    var rv = {};
  
    for (var i = keys.length - 1; i >= 0; i--) {
      var key = keys[i];
      var value = this.storage_[key];
      if (typeof value == 'string') {
        try {
          rv[key] = JSON.parse(value);
        } catch (e) {
          // If we can't parse the value, just return it unparsed.
          rv[key] = value;
        }
      } else {
        keys.splice(i, 1);
      }
    }
  
    setTimeout(callback.bind(null, rv), 0);
  };
  
  /**
   * Set a value in storage.
   *
   * @param {string} key The key for the value to be stored.
   * @param {*} value The value to be stored.  Anything that can be serialized
   *     with JSON is acceptable.
   * @param {function()} opt_callback Optional function to invoke when the
   *     set is complete.  You don't have to wait for the set to complete in order
   *     to read the value, since the local cache is updated synchronously.
   */
  lib.Storage.Memory.prototype.setItem = function(key, value, opt_callback) {
    var oldValue = this.storage_[key];
    this.storage_[key] = JSON.stringify(value);
  
    var e = {};
    e[key] = {oldValue: oldValue, newValue: value};
  
    setTimeout(function() {
      for (var i = 0; i < this.observers_.length; i++) {
        this.observers_[i](e);
      }
    }.bind(this), 0);
  
    if (opt_callback)
    setTimeout(opt_callback, 0);
  };
  
  /**
   * Set multiple values in storage.
   *
   * @param {Object} map A map of key/values to set in storage.
   * @param {function()} opt_callback Optional function to invoke when the
   *     set is complete.  You don't have to wait for the set to complete in order
   *     to read the value, since the local cache is updated synchronously.
   */
  lib.Storage.Memory.prototype.setItems = function(obj, opt_callback) {
    var e = {};
  
    for (var key in obj) {
      e[key] = {oldValue: this.storage_[key], newValue: obj[key]};
      this.storage_[key] = JSON.stringify(obj[key]);
    }
  
    setTimeout(function() {
      for (var i = 0; i < this.observers_.length; i++) {
        this.observers_[i](e);
      }
    }.bind(this));
  
    if (opt_callback)
    setTimeout(opt_callback, 0);
  };
  
  /**
   * Remove an item from storage.
   *
   * @param {string} key The key to be removed.
   * @param {function()} opt_callback Optional function to invoke when the
   *     remove is complete.  You don't have to wait for the set to complete in
   *     order to read the value, since the local cache is updated synchronously.
   */
  lib.Storage.Memory.prototype.removeItem = function(key, opt_callback) {
    delete this.storage_[key];
  
    if (opt_callback)
    setTimeout(opt_callback, 0);
  };
  
  /**
   * Remove multiple items from storage.
   *
   * @param {Array} keys The keys to be removed.
   * @param {function()} opt_callback Optional function to invoke when the
   *     remove is complete.  You don't have to wait for the set to complete in
   *     order to read the value, since the local cache is updated synchronously.
   */
  lib.Storage.Memory.prototype.removeItems = function(ary, opt_callback) {
    for (var i = 0; i < ary.length; i++) {
      delete this.storage_[ary[i]];
    }
  
    if (opt_callback)
    setTimeout(opt_callback, 0);
  };
  // SOURCE FILE: libdot/js/lib_test_manager.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  /**
   * @fileoverview JavaScript unit testing framework for synchronous and
   *     asynchronous tests.
   *
   * This file contains the lib.TestManager and related classes.  At the moment
   * it's all collected in a single file since it's reasonably small
   * (=~1k lines), and it's a lot easier to include one file into your test
   * harness than it is to include seven.
   *
   * The following classes are defined...
   *
   *   lib.TestManager - The root class and entrypoint for creating test runs.
   *   lib.TestManager.Log - Logging service.
   *   lib.TestManager.Suite - A collection of tests.
   *   lib.TestManager.Test - A single test.
   *   lib.TestManager.TestRun - Manages the execution of a set of tests.
   *   lib.TestManager.Result - A single test result.
   */
  
  /**
   * Root object in the unit test heirarchy, and keeper of the log object.
   *
   * @param {lib.TestManager.Log} opt_log Optional lib.TestManager.Log object.
   *     Logs to the JavaScript console if ommitted.
   */
  lib.TestManager = function(opt_log) {
    this.log = opt_log || new lib.TestManager.Log();
  }
  
  /**
   * Create a new test run object for this test manager.
   *
   * @param {Object} opt_cx An object to be passed to test suite setup(),
   *     preamble(), and test cases during this test run.  This object is opaque
   *     to lib.TestManager.* code.  It's entirely up to the test suite what it's
   *     used for.
   */
  lib.TestManager.prototype.createTestRun = function(opt_cx) {
    return new lib.TestManager.TestRun(this, opt_cx);
  };
  
  /**
   * Called when a test run associated with this test manager completes.
   *
   * Clients may override this to call an appropriate function.
   */
  lib.TestManager.prototype.onTestRunComplete = function(testRun) {};
  
  /**
   * Destination for test case output.
   *
   * @param {function(string)} opt_logFunction Optional function to call to
   *     write a string to the log.  If ommitted, console.log is used.
   */
  lib.TestManager.Log = function(opt_logFunction) {
    this.logFunction_ = opt_logFunction || function(s) { console.log(s) };
    this.pending_ = '';
    this.prefix_ = '';
    this.prefixStack_ = [];
  };
  
  /**
   * Add a prefix to log messages.
   *
   * This only affects log messages that are added after the prefix is pushed.
   *
   * @param {string} str The prefix to prepend to future log messages.
   */
  lib.TestManager.Log.prototype.pushPrefix = function(str) {
    this.prefixStack_.push(str);
    this.prefix_ = this.prefixStack_.join('');
  };
  
  /**
   * Remove the most recently added message prefix.
   */
  lib.TestManager.Log.prototype.popPrefix = function() {
    this.prefixStack_.pop();
    this.prefix_ = this.prefixStack_.join('');
  };
  
  /**
   * Queue up a string to print to the log.
   *
   * If a line is already pending, this string is added to it.
   *
   * The string is not actually printed to the log until flush() or println()
   * is called.  The following call sequence will result in TWO lines in the
   * log...
   *
   *   log.print('hello');
   *   log.print(' ');
   *   log.println('world');
   *
   * While a typical stream-like thing would result in 'hello world\n', this one
   * results in 'hello \nworld\n'.
   *
   * @param {string} str The string to add to the log.
   */
  lib.TestManager.Log.prototype.print = function(str) {
    if (this.pending_) {
      this.pending_ += str;
    } else {
      this.pending_ = this.prefix_ + str;
    }
  };
  
  /**
   * Print a line to the log and flush it immediately.
   *
   * @param {string} str The string to add to the log.
   */
  lib.TestManager.Log.prototype.println = function(str) {
    if (this.pending_)
      this.flush();
  
    this.logFunction_(this.prefix_ + str);
  };
  
  /**
   * Flush any pending log message.
   */
  lib.TestManager.Log.prototype.flush = function() {
    if (!this.pending_)
      return;
  
    this.logFunction_(this.pending_);
    this.pending_ = '';
  };
  
  /**
   * Returns a new constructor function that will inherit from
   * lib.TestManager.Suite.
   *
   * Use this function to create a new test suite subclass.  It will return a
   * properly initialized constructor function for the subclass.  You can then
   * override the setup() and preamble() methods if necessary and add test cases
   * to the subclass.
   *
   *   var MyTests = new lib.TestManager.Suite('MyTests');
   *
   *   MyTests.prototype.setup = function(cx) {
   *     // Sets this.size to cx.size if it exists, or the default value of 10
   *     // if not.
   *     this.setDefault(cx, {size: 10});
   *   };
   *
   *   MyTests.prototype.preamble = function(result, cx) {
   *     // Some tests (even successful ones) may side-effect this list, so
   *     // recreate it before every test.
   *     this.list = [];
   *     for (var i = 0; i < this.size; i++) {
   *       this.list[i] = i;
   *     }
   *   };
   *
   *   // Basic synchronous test case.
   *   MyTests.addTest('pop-length', function(result, cx) {
   *       this.list.pop();
   *
   *       // If this assertion fails, the testcase will stop here.
   *       result.assertEQ(this.list.length, this.size - 1);
   *
   *       // A test must indicate it has passed by calling this method.
   *       result.pass();
   *     });
   *
   *   // Sample asynchronous test case.
   *   MyTests.addTest('async-pop-length', function(result, cx) {
   *       var self = this;
   *
   *       var callback = function() {
   *           result.assertEQ(self.list.length, self.size - 1);
   *           result.pass();
   *       };
   *
   *       // Wait 100ms to check the array length for the sake of this example.
   *       setTimeout(callback, 100);
   *
   *       this.list.pop();
   *
   *       // Indicate that this test needs another 200ms to complete.
   *       // If the test does not report pass/fail by then, it is considered to
   *       // have timed out.
   *       result.requestTime(200);
   *     });
   *
   *   ...
   *
   * @param {string} suiteName The name of the test suite.
   */
  lib.TestManager.Suite = function(suiteName) {
    function ctor(testManager, cx) {
      this.testManager_ = testManager;
      this.suiteName = suiteName;
  
      this.setup(cx);
    }
  
    ctor.suiteName = suiteName;
    ctor.addTest = lib.TestManager.Suite.addTest;
    ctor.disableTest = lib.TestManager.Suite.disableTest;
    ctor.getTest = lib.TestManager.Suite.getTest;
    ctor.getTestList = lib.TestManager.Suite.getTestList;
    ctor.testList_ = [];
    ctor.testMap_ = {};
    ctor.prototype = { __proto__: lib.TestManager.Suite.prototype };
  
    lib.TestManager.Suite.subclasses.push(ctor);
  
    return ctor;
  };
  
  /**
   * List of lib.TestManager.Suite subclasses, in the order they were defined.
   */
  lib.TestManager.Suite.subclasses = [];
  
  /**
   * Add a test to a lib.TestManager.Suite.
   *
   * This method is copied to new subclasses when they are created.
   */
  lib.TestManager.Suite.addTest = function(testName, testFunction) {
    if (testName in this.testMap_)
      throw 'Duplicate test name: ' + testName;
  
    var test = new lib.TestManager.Test(this, testName, testFunction);
    this.testMap_[testName] = test;
    this.testList_.push(test);
  };
  
  /**
   * Defines a disabled test.
   */
  lib.TestManager.Suite.disableTest = function(testName, testFunction) {
    if (testName in this.testMap_)
      throw 'Duplicate test name: ' + testName;
  
    var test = new lib.TestManager.Test(this, testName, testFunction);
    console.log('Disabled test: ' + test.fullName);
  };
  
  /**
   * Get a lib.TestManager.Test instance by name.
   *
   * This method is copied to new subclasses when they are created.
   *
   * @param {string} testName The name of the desired test.
   * @return {lib.TestManager.Test} The requested test, or undefined if it was not
   *     found.
   */
  lib.TestManager.Suite.getTest = function(testName) {
    return this.testMap_[testName];
  };
  
  /**
   * Get an array of lib.TestManager.Tests associated with this Suite.
   *
   * This method is copied to new subclasses when they are created.
   */
  lib.TestManager.Suite.getTestList = function() {
    return this.testList_;
  };
  
  /**
   * Set properties on a test suite instance, pulling the property value from
   * the context if it exists and from the defaults dictionary if not.
   *
   * This is intended to be used in your test suite's setup() method to
   * define parameters for the test suite which may be overridden through the
   * context object.  For example...
   *
   *   MySuite.prototype.setup = function(cx) {
   *     this.setDefaults(cx, {size: 10});
   *   };
   *
   * If the context object has a 'size' property then this.size will be set to
   * the value of cx.size, otherwise this.size will get a default value of 10.
   *
   * @param {Object} cx The context object for a test run.
   * @param {Object} defaults An object containing name/value pairs to set on
   *     this test suite instance.  The value listed here will be used if the
   *     name is not defined on the context object.
   */
  lib.TestManager.Suite.prototype.setDefaults = function(cx, defaults) {
    for (var k in defaults) {
      this[k] = (k in cx) ? cx[k] : defaults[k];
    }
  };
  
  /**
   * Subclassable method called to set up the test suite.
   *
   * The default implementation of this method is a no-op.  If your test suite
   * requires some kind of suite-wide setup, this is the place to do it.
   *
   * It's fine to store state on the test suite instance, that state will be
   * accessible to all tests in the suite.  If any test case fails, the entire
   * test suite object will be discarded and a new one will be created for
   * the remaining tests.
   *
   * Any side effects outside of this test suite instance must be idempotent.
   * For example, if you're adding DOM nodes to a document, make sure to first
   * test that they're not already there.  If they are, remove them rather than
   * reuse them.  You should not count on their state, since they were probably
   * left behind by a failed testcase.
   *
   * Any exception here will abort the remainder of the test run.
   *
   * @param {Object} cx The context object for a test run.
   */
  lib.TestManager.Suite.prototype.setup = function(cx) {};
  
  /**
   * Subclassable method called to do pre-test set up.
   *
   * The default implementation of this method is a no-op.  If your test suite
   * requires some kind of pre-test setup, this is the place to do it.
   *
   * This can be used to avoid a bunch of boilerplate setup/teardown code in
   * this suite's testcases.
   *
   * Any exception here will abort the remainder of the test run.
   *
   * @param {lib.TestManager.Result} result The result object for the upcoming
   *     test.
   * @param {Object} cx The context object for a test run.
   */
  lib.TestManager.Suite.prototype.preamble = function(result, cx) {};
  
  /**
   * Subclassable method called to do post-test tear-down.
   *
   * The default implementation of this method is a no-op.  If your test suite
   * requires some kind of pre-test setup, this is the place to do it.
   *
   * This can be used to avoid a bunch of boilerplate setup/teardown code in
   * this suite's testcases.
   *
   * Any exception here will abort the remainder of the test run.
   *
   * @param {lib.TestManager.Result} result The result object for the upcoming
   *     test.
   * @param {Object} cx The context object for a test run.
   */
  lib.TestManager.Suite.prototype.postamble = function(result, cx) {};
  
  /**
   * Object representing a single test in a test suite.
   *
   * These are created as part of the lib.TestManager.Suite.addTest() method.
   * You should never have to construct one by hand.
   *
   * @param {lib.TestManager.Suite} suiteClass The test suite class containing
   *     this test.
   * @param {string} testName The local name of this test case, not including the
   *     test suite name.
   * @param {function(lib.TestManager.Result, Object)} testFunction The function
   *     to invoke for this test case.  This is passed a Result instance and the
   *     context object associated with the test run.
   *
   */
  lib.TestManager.Test = function(suiteClass, testName, testFunction) {
    /**
     * The test suite class containing this function.
     */
    this.suiteClass = suiteClass;
  
    /**
     * The local name of this test, not including the test suite name.
     */
    this.testName = testName;
  
    /**
     * The global name of this test, including the test suite name.
     */
    this.fullName = suiteClass.suiteName + '[' + testName + ']';
  
    // The function to call for this test.
    this.testFunction_ = testFunction;
  };
  
  /**
   * Execute this test.
   *
   * This is called by a lib.TestManager.Result instance, as part of a
   * lib.TestManager.TestRun.  You should not call it by hand.
   *
   * @param {lib.TestManager.Result} result The result object for the test.
   */
  lib.TestManager.Test.prototype.run = function(result) {
    try {
      // Tests are applied to the parent lib.TestManager.Suite subclass.
      this.testFunction_.apply(result.suite,
                               [result, result.testRun.cx]);
    } catch (ex) {
      if (ex instanceof lib.TestManager.Result.TestComplete)
        return;
  
      result.println('Test raised an exception: ' + ex);
  
      if (ex.stack) {
        if (ex.stack instanceof Array) {
          result.println(ex.stack.join('\n'));
        } else {
          result.println(ex.stack);
        }
      }
  
      result.completeTest_(result.FAILED, false);
    }
  };
  
  /**
   * Used to choose a set of tests and run them.
   *
   * It's slightly more convenient to construct one of these from
   * lib.TestManager.prototype.createTestRun().
   *
   * @param {lib.TestManager} testManager The testManager associated with this
   *     TestRun.
   * @param {Object} cx A context to be passed into the tests.  This can be used
   *     to set parameters for the test suite or individual test cases.
   */
  lib.TestManager.TestRun = function(testManager, cx) {
    /**
     * The associated lib.TestManager instance.
     */
    this.testManager = testManager;
  
    /**
     * Shortcut to the lib.TestManager's log.
     */
    this.log = testManager.log;
  
    /**
     * The test run context.  It's entirely up to the test suite and test cases
     * how this is used.  It is opaque to lib.TestManager.* classes.
     */
    this.cx = cx || {};
  
    /**
     * The list of test cases that encountered failures.
     */
    this.failures = [];
  
    /**
     * The list of test cases that passed.
     */
    this.passes = [];
  
    /**
     * The time the test run started, or null if it hasn't been started yet.
     */
    this.startDate = null;
  
    /**
     * The time in milliseconds that the test run took to complete, or null if
     * it hasn't completed yet.
     */
    this.duration = null;
  
    /**
     * The most recent result object, or null if the test run hasn't started
     * yet.  In order to detect late failures, this is not cleared when the test
     * completes.
     */
    this.currentResult = null;
  
    /**
     * Number of maximum failures.  The test run will stop when this number is
     * reached.  If 0 or ommitted, the entire set of selected tests is run, even
     * if some fail.
     */
    this.maxFailures = 0;
  
    /**
     * True if this test run ended early because of an unexpected condition.
     */
    this.panic = false;
  
    // List of pending test cases.
    this.testQueue_ = [];
  
  };
  
  /**
   * This value can be passed to select() to indicate that all tests should
   * be selected.
   */
  lib.TestManager.TestRun.prototype.ALL_TESTS = new String('<all-tests>');
  
  /**
   * Add a single test to the test run.
   */
  lib.TestManager.TestRun.prototype.selectTest = function(test) {
    this.testQueue_.push(test);
  };
  
  lib.TestManager.TestRun.prototype.selectSuite = function(
      suiteClass, opt_pattern) {
    var pattern = opt_pattern || this.ALL_TESTS;
    var selectCount = 0;
    var testList = suiteClass.getTestList();
  
    for (var j = 0; j < testList.length; j++) {
      var test = testList[j];
      // Note that we're using "!==" rather than "!=" so that we're matching
      // the ALL_TESTS String object, rather than the contents of the string.
      if (pattern !== this.ALL_TESTS) {
        if (pattern instanceof RegExp) {
          if (!pattern.test(test.testName))
            continue;
        } else if (test.testName != pattern) {
          continue;
        }
      }
  
      this.selectTest(test);
      selectCount++;
    }
  
    return selectCount;
  };
  
  /**
   * Selects one or more tests to gather results for.
   *
   * Selecting the same test more than once is allowed.
   *
   * @param {string|RegExp} pattern Pattern used to select tests.
   *     If TestRun.prototype.ALL_TESTS, all tests are selected.
   *     If a string, only the test that exactly matches is selected.
   *     If a RegExp, only tests matching the RegExp are added.
   *
   * @return {int} The number of additional tests that have been selected into
   *     this TestRun.
   */
  lib.TestManager.TestRun.prototype.selectPattern = function(pattern) {
    var selectCount = 0;
  
    for (var i = 0; i < lib.TestManager.Suite.subclasses.length; i++) {
      selectCount += this.selectSuite(lib.TestManager.Suite.subclasses[i],
                                      pattern);
    }
  
    if (!selectCount) {
      this.log.println('No tests matched selection criteria: ' + pattern);
    }
  
    return selectCount;
  };
  
  /**
   * Hooked up to window.onerror during a test run in order to catch exceptions
   * that would otherwise go uncaught.
   */
  lib.TestManager.TestRun.prototype.onUncaughtException_ = function(
      message, file, line) {
  
    if (message.indexOf('Uncaught lib.TestManager.Result.TestComplete') == 0 ||
        message.indexOf('status: passed') != -1) {
      // This is a result.pass() or result.fail() call from a callback.  We're
      // already going to deal with it as part of the completeTest_() call
      // that raised it.  We can safely squelch this error message.
      return true;
    }
  
    if (!this.currentResult)
      return;
  
    if (message == 'Uncaught ' + this.currentResult.expectedErrorMessage_) {
      // Test cases may need to raise an unhandled exception as part of the test.
      return;
    }
  
    var when = 'during';
  
    if (this.currentResult.status != this.currentResult.PENDING)
      when = 'after';
  
    this.log.println('Uncaught exception ' + when + ' test case: ' +
                     this.currentResult.test.fullName);
    this.log.println(message + ', ' + file + ':' + line);
  
    this.currentResult.completeTest_(this.currentResult.FAILED, false);
  
    return false;
  };
  
  /**
   * Called to when this test run has completed.
   *
   * This method typically re-runs itself asynchronously, in order to let the
   * DOM stabilize and short-term timeouts to complete before declaring the
   * test run complete.
   *
   * @param {boolean} opt_skipTimeout If true, the timeout is skipped and the
   *     test run is completed immediately.  This should only be used from within
   *     this function.
   */
  lib.TestManager.TestRun.prototype.onTestRunComplete_ = function(
      opt_skipTimeout) {
    if (!opt_skipTimeout) {
      // The final test may have left a lingering setTimeout(..., 0), or maybe
      // poked at the DOM in a way that will trigger a event to fire at the end
      // of this stack, so we give things a chance to settle down before our
      // final cleanup...
      setTimeout(this.onTestRunComplete_.bind(this), 0, true);
      return;
    }
  
    this.duration = (new Date()) - this.startDate;
  
    this.log.popPrefix();
    this.log.println('} ' + this.passes.length + ' passed, ' +
                     this.failures.length + ' failed, '  +
                     this.msToSeconds_(this.duration));
    this.log.println('');
  
    this.summarize();
  
    window.onerror = null;
  
    this.testManager.onTestRunComplete(this);
  };
  
  /**
   * Called by the lib.TestManager.Result object when a test completes.
   *
   * @param {lib.TestManager.Result} result The result object which has just
   *     completed.
   */
  lib.TestManager.TestRun.prototype.onResultComplete = function(result) {
    try {
      result.suite.postamble();
    } catch (ex) {
      this.log.println('Unexpected exception in postamble: ' +
                       (ex.stack ? ex.stack : ex));
      this.panic = true;
    }
  
    this.log.popPrefix();
    this.log.print('} ' + result.status + ', ' +
                   this.msToSeconds_(result.duration));
    this.log.flush();
  
    if (result.status == result.FAILED) {
      this.failures.push(result);
      this.currentSuite = null;
    } else if (result.status == result.PASSED) {
      this.passes.push(result);
    } else {
      this.log.println('Unknown result status: ' + result.test.fullName + ': ' +
                       result.status);
      return this.panic = true;
    }
  
    this.runNextTest_();
  };
  
  /**
   * Called by the lib.TestManager.Result object when a test which has already
   * completed reports another completion.
   *
   * This is usually indicative of a buggy testcase.  It is probably reporting a
   * result on exit and then again from an asynchronous callback.
   *
   * It may also be the case that the last act of the testcase causes a DOM change
   * which triggers some event to run after the test returns.  If the event
   * handler reports a failure or raises an uncaught exception, the test will
   * fail even though it has already completed.
   *
   * In any case, re-completing a test ALWAYS moves it into the failure pile.
   *
   * @param {lib.TestManager.Result} result The result object which has just
   *     completed.
   * @param {string} lateStatus The status that the test attempted to record this
   *     time around.
   */
  lib.TestManager.TestRun.prototype.onResultReComplete = function(
      result, lateStatus) {
    this.log.println('Late complete for test: ' + result.test.fullName + ': ' +
                     lateStatus);
  
    // Consider any late completion a failure, even if it's a double-pass, since
    // it's a misuse of the testing API.
    var index = this.passes.indexOf(result);
    if (index >= 0) {
      this.passes.splice(index, 1);
      this.failures.push(result);
    }
  };
  
  /**
   * Run the next test in the queue.
   */
  lib.TestManager.TestRun.prototype.runNextTest_ = function() {
    if (this.panic || !this.testQueue_.length)
      return this.onTestRunComplete_();
  
    if (this.maxFailures && this.failures.length >= this.maxFailures) {
      this.log.println('Maximum failure count reached, aborting test run.');
      return this.onTestRunComplete_();
    }
  
    // Peek at the top test first.  We remove it later just before it's about
    // to run, so that we don't disturb the incomplete test count in the
    // event that we fail before running it.
    var test = this.testQueue_[0];
    var suite = this.currentResult ? this.currentResult.suite : null;
  
    try {
      if (!suite || !(suite instanceof test.suiteClass)) {
        this.log.println('Initializing suite: ' + test.suiteClass.suiteName);
        suite = new test.suiteClass(this.testManager, this.cx);
      }
    } catch (ex) {
      // If test suite setup fails we're not even going to try to run the tests.
      this.log.println('Exception during setup: ' + (ex.stack ? ex.stack : ex));
      this.panic = true;
      this.onTestRunComplete_();
      return;
    }
  
    try {
      this.log.print('Test: ' + test.fullName + ' {');
      this.log.pushPrefix('  ');
  
      this.currentResult = new lib.TestManager.Result(this, suite, test);
      suite.preamble(this.currentResult, this.cx);
  
      this.testQueue_.shift();
    } catch (ex) {
      this.log.println('Unexpected exception during test preamble: ' +
                       (ex.stack ? ex.stack : ex));
      this.log.popPrefix();
      this.log.println('}');
  
      this.panic = true;
      this.onTestRunComplete_();
      return;
    }
  
    try {
      this.currentResult.run();
    } catch (ex) {
      // Result.run() should catch test exceptions and turn them into failures.
      // If we got here, it means there is trouble in the testing framework.
      this.log.println('Unexpected exception during test run: ' +
                       (ex.stack ? ex.stack : ex));
      this.panic = true;
    }
  };
  
  /**
   * Run the selected list of tests.
   *
   * Some tests may need to run asynchronously, so you cannot assume the run is
   * complete when this function returns.  Instead, pass in a function to be
   * called back when the run has completed.
   *
   * This function will log the results of the test run as they happen into the
   * log defined by the associated lib.TestManager.  By default this is
   * console.log, which can be viewed in the JavaScript console of most browsers.
   *
   * The browser state is determined by the last test to run.  We intentionally
   * don't do any cleanup so that you can inspect the state of a failed test, or
   * leave the browser ready for manual testing.
   *
   * Any failures in lib.TestManager.* code or test suite setup or test case
   * preamble will cause the test run to abort.
   */
  lib.TestManager.TestRun.prototype.run = function() {
    this.log.println('Running ' + this.testQueue_.length + ' test(s) {');
    this.log.pushPrefix('  ');
  
    window.onerror = this.onUncaughtException_.bind(this);
    this.startDate = new Date();
    this.runNextTest_();
  };
  
  /**
   * Format milliseconds as fractional seconds.
   */
  lib.TestManager.TestRun.prototype.msToSeconds_ = function(ms) {
    var secs = (ms / 1000).toFixed(2);
    return secs + 's';
  };
  
  /**
   * Log the current result summary.
   */
  lib.TestManager.TestRun.prototype.summarize = function() {
    if (this.failures.length) {
      for (var i = 0; i < this.failures.length; i++) {
        this.log.println('FAILED: ' + this.failures[i].test.fullName);
      }
    }
  
    if (this.testQueue_.length) {
      this.log.println('Test run incomplete: ' + this.testQueue_.length +
                       ' test(s) were not run.');
    }
  };
  
  /**
   * Record of the result of a single test.
   *
   * These are constructed during a test run, you shouldn't have to make one
   * on your own.
   *
   * An instance of this class is passed in to each test function.  It can be
   * used to add messages to the test log, to record a test pass/fail state, to
   * test assertions, or to create exception-proof wrappers for callback
   * functions.
   *
   * @param {lib.TestManager.TestRun} testRun The TestRun instance associated with
   *     this result.
   * @param {lib.TestManager.Suit} suite The Suite containing the test we're
   *     collecting this result for.
   * @param {lib.TestManager.Test} test The test we're collecting this result for.
   */
  lib.TestManager.Result = function(testRun, suite, test) {
    /**
     * The TestRun instance associated with this result.
     */
    this.testRun = testRun;
  
    /**
     * The Suite containing the test we're collecting this result for.
     */
    this.suite = suite;
  
    /**
     * The test we're collecting this result for.
     */
    this.test = test;
  
    /**
     * The time we started to collect this result, or null if we haven't started.
     */
    this.startDate = null;
  
    /**
     * The time in milliseconds that the test took to complete, or null if
     * it hasn't completed yet.
     */
    this.duration = null;
  
    /**
     * The current status of this test result.
     */
    this.status = this.PENDING;
  
    // An error message that the test case is expected to generate.
    this.expectedErrorMessage_ = null;
  };
  
  /**
   * Possible values for this.status.
   */
  lib.TestManager.Result.prototype.PENDING = 'pending';
  lib.TestManager.Result.prototype.FAILED  = 'FAILED';
  lib.TestManager.Result.prototype.PASSED  = 'passed';
  
  /**
   * Exception thrown when a test completes (pass or fail), to ensure no more of
   * the test is run.
   */
  lib.TestManager.Result.TestComplete = function(result) {
    this.result = result;
  };
  
  lib.TestManager.Result.TestComplete.prototype.toString = function() {
    return 'lib.TestManager.Result.TestComplete: ' + this.result.test.fullName +
        ', status: ' + this.result.status;
  }
  
  /**
   * Start the test associated with this result.
   */
  lib.TestManager.Result.prototype.run = function() {
    var self = this;
  
    this.startDate = new Date();
    this.test.run(this);
  
    if (this.status == this.PENDING && !this.timeout_) {
      this.println('Test did not return a value and did not request more time.');
      this.completeTest_(this.FAILED, false);
    }
  };
  
  /**
   * Unhandled error message this test expects to generate.
   *
   * This must be the exact string that would appear in the JavaScript console,
   * minus the 'Uncaught ' prefix.
   *
   * The test case does *not* automatically fail if the error message is not
   * encountered.
   */
  lib.TestManager.Result.prototype.expectErrorMessage = function(str) {
    this.expectedErrorMessage_ = str;
  };
  
  /**
   * Function called when a test times out.
   */
  lib.TestManager.Result.prototype.onTimeout_ = function() {
    this.timeout_ = null;
  
    if (this.status != this.PENDING)
      return;
  
    this.println('Test timed out.');
    this.completeTest_(this.FAILED, false);
  };
  
  /**
   * Indicate that a test case needs more time to complete.
   *
   * Before a test case returns it must report a pass/fail result, or request more
   * time to do so.
   *
   * If a test does not report pass/fail before the time expires it will
   * be reported as a timeout failure.  Any late pass/fails will be noted in the
   * test log, but will not affect the final result of the test.
   *
   * Test cases may call requestTime more than once.  If you have a few layers
   * of asynchronous API to go through, you should call this once per layer with
   * an estimate of how long each callback will take to complete.
   *
   * @param {int} ms Number of milliseconds requested.
   */
  lib.TestManager.Result.prototype.requestTime = function(ms) {
    if (this.timeout_)
      clearTimeout(this.timeout_);
  
    this.timeout_ = setTimeout(this.onTimeout_.bind(this), ms);
  };
  
  /**
   * Report the completion of a test.
   *
   * @param {string} status The status of the test case.
   * @param {boolean} opt_throw Optional boolean indicating whether or not
   *     to throw the TestComplete exception.
   */
  lib.TestManager.Result.prototype.completeTest_ = function(status, opt_throw) {
    if (this.status == this.PENDING) {
      this.duration = (new Date()) - this.startDate;
      this.status = status;
  
      this.testRun.onResultComplete(this);
    } else {
      this.testRun.onResultReComplete(this, status);
    }
  
    if (arguments.length < 2 || opt_throw)
      throw new lib.TestManager.Result.TestComplete(this);
  };
  
  /**
   * Assert that an actual value is exactly equal to the expected value.
   *
   * This uses the JavaScript '===' operator in order to avoid type coercion.
   *
   * If the assertion fails, the test is marked as a failure and a TestCompleted
   * exception is thrown.
   *
   * @param {*} actual The actual measured value.
   * @param {*} expected The value expected.
   * @param {string} opt_name An optional name used to identify this
   *     assertion in the test log.  If ommitted it will be the file:line
   *     of the caller.
   */
  lib.TestManager.Result.prototype.assertEQ = function(
      actual, expected, opt_name) {
    // Utility function to pretty up the log.
    function format(value) {
      if (typeof value == 'number')
        return value;
  
      var str = String(value);
      var ary = str.split('\n').map(function (e) { return JSON.stringify(e) });
      if (ary.length > 1) {
        // If the string has newlines, start it off on its own line so that
        // it's easier to compare against another string with newlines.
        return '\n' + ary.join('\n');
      } else {
        return ary.join('\n');
      }
    }
  
    if (actual === expected)
      return;
  
    var name = opt_name ? '[' + opt_name + ']' : '';
  
    this.fail('assertEQ' + name + ': ' + this.getCallerLocation_(1) + ': ' +
              format(actual) + ' !== ' + format(expected));
  };
  
  /**
   * Assert that a value is true.
   *
   * This uses the JavaScript '===' operator in order to avoid type coercion.
   * The must be the boolean value `true`, not just some "truish" value.
   *
   * If the assertion fails, the test is marked as a failure and a TestCompleted
   * exception is thrown.
   *
   * @param {boolean} actual The actual measured value.
   * @param {string} opt_name An optional name used to identify this
   *     assertion in the test log.  If ommitted it will be the file:line
   *     of the caller.
   */
  lib.TestManager.Result.prototype.assert = function(actual, opt_name) {
    if (actual === true)
      return;
  
    var name = opt_name ? '[' + opt_name + ']' : '';
  
    this.fail('assert' + name + ': ' + this.getCallerLocation_(1) + ': ' +
              String(actual));
  };
  
  /**
   * Return the filename:line of a calling stack frame.
   *
   * This uses a dirty hack.  It throws an exception, catches it, and examines
   * the stack property of the caught exception.
   *
   * @param {int} frameIndex The stack frame to return.  0 is the frame that
   *     called this method, 1 is its caller, and so on.
   * @return {string} A string of the format "filename:linenumber".
   */
  lib.TestManager.Result.prototype.getCallerLocation_ = function(frameIndex) {
    try {
      throw new Error();
    } catch (ex) {
      var frame = ex.stack.split('\n')[frameIndex + 2];
      var ary = frame.match(/([^/]+:\d+):\d+\)?$/);
      return ary ? ary[1] : '???';
    }
  };
  
  /**
   * Write a message to the result log.
   */
  lib.TestManager.Result.prototype.println = function(message) {
    this.testRun.log.println(message);
  };
  
  /**
   * Mark a failed test and exit out of the rest of the test.
   *
   * This will throw a TestCompleted exception, causing the current test to stop.
   *
   * @param {string} opt_message Optional message to add to the log.
   */
  lib.TestManager.Result.prototype.fail = function(opt_message) {
    if (arguments.length)
      this.println(opt_message);
  
    this.completeTest_(this.FAILED, true);
  };
  
  /**
   * Mark a passed test and exit out of the rest of the test.
   *
   * This will throw a TestCompleted exception, causing the current test to stop.
   */
  lib.TestManager.Result.prototype.pass = function() {
    this.completeTest_(this.PASSED, true);
  };
  // SOURCE FILE: libdot/js/lib_utf8.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  // TODO(davidben): When the string encoding API is implemented,
  // replace this with the native in-browser implementation.
  //
  // http://wiki.whatwg.org/wiki/StringEncoding
  // http://dvcs.w3.org/hg/encoding/raw-file/tip/Overview.html
  
  /**
   * A stateful UTF-8 decoder.
   */
  lib.UTF8Decoder = function() {
    // The number of bytes left in the current sequence.
    this.bytesLeft = 0;
    // The in-progress code point being decoded, if bytesLeft > 0.
    this.codePoint = 0;
    // The lower bound on the final code point, if bytesLeft > 0.
    this.lowerBound = 0;
  };
  
  /**
   * Decodes a some UTF-8 data, taking into account state from previous
   * data streamed through the encoder.
   *
   * @param {String} str data to decode, represented as a JavaScript
   *     String with each code unit representing a byte between 0x00 to
   *     0xFF.
   * @return {String} The data decoded into a JavaScript UTF-16 string.
   */
  lib.UTF8Decoder.prototype.decode = function(str) {
    var ret = '';
    for (var i = 0; i < str.length; i++) {
      var c = str.charCodeAt(i);
      if (this.bytesLeft == 0) {
        if (c <= 0x7F) {
          ret += str.charAt(i);
        } else if (0xC0 <= c && c <= 0xDF) {
          this.codePoint = c - 0xC0;
          this.bytesLeft = 1;
          this.lowerBound = 0x80;
        } else if (0xE0 <= c && c <= 0xEF) {
          this.codePoint = c - 0xE0;
          this.bytesLeft = 2;
          this.lowerBound = 0x800;
        } else if (0xF0 <= c && c <= 0xF7) {
          this.codePoint = c - 0xF0;
          this.bytesLeft = 3;
          this.lowerBound = 0x10000;
        } else if (0xF8 <= c && c <= 0xFB) {
          this.codePoint = c - 0xF8;
          this.bytesLeft = 4;
          this.lowerBound = 0x200000;
        } else if (0xFC <= c && c <= 0xFD) {
          this.codePoint = c - 0xFC;
          this.bytesLeft = 5;
          this.lowerBound = 0x4000000;
        } else {
          ret += '\ufffd';
        }
      } else {
        if (0x80 <= c && c <= 0xBF) {
          this.bytesLeft--;
          this.codePoint = (this.codePoint << 6) + (c - 0x80);
          if (this.bytesLeft == 0) {
            // Got a full sequence. Check if it's within bounds and
            // filter out surrogate pairs.
            var codePoint = this.codePoint;
            if (codePoint < this.lowerBound
                || (0xD800 <= codePoint && codePoint <= 0xDFFF)
                || codePoint > 0x10FFFF) {
              ret += '\ufffd';
            } else {
              // Encode as UTF-16 in the output.
              if (codePoint < 0x10000) {
                ret += String.fromCharCode(codePoint);
              } else {
                // Surrogate pair.
                codePoint -= 0x10000;
                ret += String.fromCharCode(
                  0xD800 + ((codePoint >>> 10) & 0x3FF),
                  0xDC00 + (codePoint & 0x3FF));
              }
            }
          }
        } else {
          // Too few bytes in multi-byte sequence. Rewind stream so we
          // don't lose the next byte.
          ret += '\ufffd';
          this.bytesLeft = 0;
          i--;
        }
      }
    }
    return ret;
  };
  
  /**
   * Decodes UTF-8 data. This is a convenience function for when all the
   * data is already known.
   *
   * @param {String} str data to decode, represented as a JavaScript
   *     String with each code unit representing a byte between 0x00 to
   *     0xFF.
   * @return {String} The data decoded into a JavaScript UTF-16 string.
   */
  lib.decodeUTF8 = function(utf8) {
    return (new lib.UTF8Decoder()).decode(utf8);
  };
  
  /**
   * Encodes a UTF-16 string into UTF-8.
   *
   * TODO(davidben): Do we need a stateful version of this that can
   * handle a surrogate pair split in two calls? What happens if a
   * keypress event would have contained a character outside the BMP?
   *
   * @param {String} str The string to encode.
   * @return {String} The string encoded as UTF-8, as a JavaScript
   *     string with bytes represented as code units from 0x00 to 0xFF.
   */
  lib.encodeUTF8 = function(str) {
    var ret = '';
    for (var i = 0; i < str.length; i++) {
      // Get a unicode code point out of str.
      var c = str.charCodeAt(i);
      if (0xDC00 <= c && c <= 0xDFFF) {
        c = 0xFFFD;
      } else if (0xD800 <= c && c <= 0xDBFF) {
        if (i+1 < str.length) {
          var d = str.charCodeAt(i+1);
          if (0xDC00 <= d && d <= 0xDFFF) {
            // Swallow a surrogate pair.
            c = 0x10000 + ((c & 0x3FF) << 10) + (d & 0x3FF);
            i++;
          } else {
            c = 0xFFFD;
          }
        } else {
          c = 0xFFFD;
        }
      }
  
      // Encode c in UTF-8.
      var bytesLeft;
      if (c <= 0x7F) {
        ret += str.charAt(i);
        continue;
      } else if (c <= 0x7FF) {
        ret += String.fromCharCode(0xC0 | (c >>> 6));
        bytesLeft = 1;
      } else if (c <= 0xFFFF) {
        ret += String.fromCharCode(0xE0 | (c >>> 12));
        bytesLeft = 2;
      } else /* if (c <= 0x10FFFF) */ {
        ret += String.fromCharCode(0xF0 | (c >>> 18));
        bytesLeft = 3;
      }
  
      while (bytesLeft > 0) {
        bytesLeft--;
        ret += String.fromCharCode(0x80 | ((c >>> (6 * bytesLeft)) & 0x3F));
      }
    }
    return ret;
  };
  // SOURCE FILE: libdot/js/lib_wc.js
  // Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
  // Use of lib.wc source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  /**
   * This JavaScript library is ported from the wcwidth.js module of node.js.
   * The original implementation can be found at:
   * https://npmjs.org/package/wcwidth.js
   */
  
  /**
   * JavaScript porting of Markus Kuhn's wcwidth() implementation
   *
   * The following explanation comes from the original C implementation:
   *
   * This is an implementation of wcwidth() and wcswidth() (defined in
   * IEEE Std 1002.1-2001) for Unicode.
   *
   * http://www.opengroup.org/onlinepubs/007904975/functions/wcwidth.html
   * http://www.opengroup.org/onlinepubs/007904975/functions/wcswidth.html
   *
   * In fixed-width output devices, Latin characters all occupy a single
   * "cell" position of equal width, whereas ideographic CJK characters
   * occupy two such cells. Interoperability between terminal-line
   * applications and (teletype-style) character terminals using the
   * UTF-8 encoding requires agreement on which character should advance
   * the cursor by how many cell positions. No established formal
   * standards exist at present on which Unicode character shall occupy
   * how many cell positions on character terminals. These routines are
   * a first attempt of defining such behavior based on simple rules
   * applied to data provided by the Unicode Consortium.
   *
   * For some graphical characters, the Unicode standard explicitly
   * defines a character-cell width via the definition of the East Asian
   * FullWidth (F), Wide (W), Half-width (H), and Narrow (Na) classes.
   * In all these cases, there is no ambiguity about which width a
   * terminal shall use. For characters in the East Asian Ambiguous (A)
   * class, the width choice depends purely on a preference of backward
   * compatibility with either historic CJK or Western practice.
   * Choosing single-width for these characters is easy to justify as
   * the appropriate long-term solution, as the CJK practice of
   * displaying these characters as double-width comes from historic
   * implementation simplicity (8-bit encoded characters were displayed
   * single-width and 16-bit ones double-width, even for Greek,
   * Cyrillic, etc.) and not any typographic considerations.
   *
   * Much less clear is the choice of width for the Not East Asian
   * (Neutral) class. Existing practice does not dictate a width for any
   * of these characters. It would nevertheless make sense
   * typographically to allocate two character cells to characters such
   * as for instance EM SPACE or VOLUME INTEGRAL, which cannot be
   * represented adequately with a single-width glyph. The following
   * routines at present merely assign a single-cell width to all
   * neutral characters, in the interest of simplicity. This is not
   * entirely satisfactory and should be reconsidered before
   * establishing a formal standard in lib.wc area. At the moment, the
   * decision which Not East Asian (Neutral) characters should be
   * represented by double-width glyphs cannot yet be answered by
   * applying a simple rule from the Unicode database content. Setting
   * up a proper standard for the behavior of UTF-8 character terminals
   * will require a careful analysis not only of each Unicode character,
   * but also of each presentation form, something the author of these
   * routines has avoided to do so far.
   *
   * http://www.unicode.org/unicode/reports/tr11/
   *
   * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
   *
   * Permission to use, copy, modify, and distribute lib.wc software
   * for any purpose and without fee is hereby granted. The author
   * disclaims all warranties with regard to lib.wc software.
   *
   * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
   */
  
  /**
   * The following function defines the column width of an ISO 10646 character
   * as follows:
   *
   *  - The null character (U+0000) has a column width of 0.
   *  - Other C0/C1 control characters and DEL will lead to a return value of -1.
   *  - Non-spacing and enclosing combining characters (general category code Mn
   *    or Me in the Unicode database) have a column width of 0.
   *  - SOFT HYPHEN (U+00AD) has a column width of 1.
   *  - Other format characters (general category code Cf in the Unicode database)
   *    and ZERO WIDTH SPACE (U+200B) have a column width of 0.
   *  - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF) have a
   *    column width of 0.
   *  - Spacing characters in the East Asian Wide (W) or East Asian Full-width (F)
   *    category as defined in Unicode Technical Report #11 have a column width of
   *    2.
   *  - East Asian Ambigous characters are taken into account if
   *    regardCjkAmbiguous flag is enabled. They have a column width of 2.
   *  - All remaining characters (including all printable ISO 8859-1 and WGL4
   *    characters, Unicode control characters, etc.) have a column width of 1.
   *
   * This implementation assumes that characters are encoded in ISO 10646.
   */
  
  /**
   * This library relies on the use of codePointAt, which is not supported in
   * all browsers. Polyfil if not.  See
   * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/codePointAt#Polyfill
   */
  if (!String.prototype.codePointAt) {
    (function() {
      'use strict'; // needed to support `apply`/`call` with `undefined`/`null`
      var codePointAt = function(position) {
        if (this == null) {
          throw TypeError();
        }
        var string = String(this);
        var size = string.length;
        // `ToInteger`
        var index = position ? Number(position) : 0;
        if (index != index) { // better `isNaN`
          index = 0;
        }
        // Account for out-of-bounds indices:
        if (index < 0 || index >= size) {
          return undefined;
        }
        // Get the first code unit
        var first = string.charCodeAt(index);
        var second;
        if ( // check if it’s the start of a surrogate pair
          first >= 0xD800 && first <= 0xDBFF && // high surrogate
          size > index + 1 // there is a next code unit
        ) {
          second = string.charCodeAt(index + 1);
          if (second >= 0xDC00 && second <= 0xDFFF) { // low surrogate
            // http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
            return (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
          }
        }
        return first;
      };
      if (Object.defineProperty) {
        Object.defineProperty(String.prototype, 'codePointAt', {
          'value': codePointAt,
          'configurable': true,
          'writable': true
        });
      } else {
        String.prototype.codePointAt = codePointAt;
      }
    }());
  }
  
  lib.wc = {};
  
  // Width of a nul character.
  lib.wc.nulWidth = 0;
  
  // Width of a control charater.
  lib.wc.controlWidth = 0;
  
  // Flag whether to consider East Asian Ambiguous characters.
  lib.wc.regardCjkAmbiguous = false;
  
  // Width of an East Asian Ambiguous character.
  lib.wc.cjkAmbiguousWidth = 2;
  
  // Sorted list of non-overlapping intervals of non-spacing characters
  // generated by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c"
  lib.wc.combining = [
      [ 0x0300, 0x036F ], [ 0x0483, 0x0486 ], [ 0x0488, 0x0489 ],
      [ 0x0591, 0x05BD ], [ 0x05BF, 0x05BF ], [ 0x05C1, 0x05C2 ],
      [ 0x05C4, 0x05C5 ], [ 0x05C7, 0x05C7 ], [ 0x0600, 0x0603 ],
      [ 0x0610, 0x0615 ], [ 0x064B, 0x065E ], [ 0x0670, 0x0670 ],
      [ 0x06D6, 0x06E4 ], [ 0x06E7, 0x06E8 ], [ 0x06EA, 0x06ED ],
      [ 0x070F, 0x070F ], [ 0x0711, 0x0711 ], [ 0x0730, 0x074A ],
      [ 0x07A6, 0x07B0 ], [ 0x07EB, 0x07F3 ], [ 0x0901, 0x0902 ],
      [ 0x093C, 0x093C ], [ 0x0941, 0x0948 ], [ 0x094D, 0x094D ],
      [ 0x0951, 0x0954 ], [ 0x0962, 0x0963 ], [ 0x0981, 0x0981 ],
      [ 0x09BC, 0x09BC ], [ 0x09C1, 0x09C4 ], [ 0x09CD, 0x09CD ],
      [ 0x09E2, 0x09E3 ], [ 0x0A01, 0x0A02 ], [ 0x0A3C, 0x0A3C ],
      [ 0x0A41, 0x0A42 ], [ 0x0A47, 0x0A48 ], [ 0x0A4B, 0x0A4D ],
      [ 0x0A70, 0x0A71 ], [ 0x0A81, 0x0A82 ], [ 0x0ABC, 0x0ABC ],
      [ 0x0AC1, 0x0AC5 ], [ 0x0AC7, 0x0AC8 ], [ 0x0ACD, 0x0ACD ],
      [ 0x0AE2, 0x0AE3 ], [ 0x0B01, 0x0B01 ], [ 0x0B3C, 0x0B3C ],
      [ 0x0B3F, 0x0B3F ], [ 0x0B41, 0x0B43 ], [ 0x0B4D, 0x0B4D ],
      [ 0x0B56, 0x0B56 ], [ 0x0B82, 0x0B82 ], [ 0x0BC0, 0x0BC0 ],
      [ 0x0BCD, 0x0BCD ], [ 0x0C3E, 0x0C40 ], [ 0x0C46, 0x0C48 ],
      [ 0x0C4A, 0x0C4D ], [ 0x0C55, 0x0C56 ], [ 0x0CBC, 0x0CBC ],
      [ 0x0CBF, 0x0CBF ], [ 0x0CC6, 0x0CC6 ], [ 0x0CCC, 0x0CCD ],
      [ 0x0CE2, 0x0CE3 ], [ 0x0D41, 0x0D43 ], [ 0x0D4D, 0x0D4D ],
      [ 0x0DCA, 0x0DCA ], [ 0x0DD2, 0x0DD4 ], [ 0x0DD6, 0x0DD6 ],
      [ 0x0E31, 0x0E31 ], [ 0x0E34, 0x0E3A ], [ 0x0E47, 0x0E4E ],
      [ 0x0EB1, 0x0EB1 ], [ 0x0EB4, 0x0EB9 ], [ 0x0EBB, 0x0EBC ],
      [ 0x0EC8, 0x0ECD ], [ 0x0F18, 0x0F19 ], [ 0x0F35, 0x0F35 ],
      [ 0x0F37, 0x0F37 ], [ 0x0F39, 0x0F39 ], [ 0x0F71, 0x0F7E ],
      [ 0x0F80, 0x0F84 ], [ 0x0F86, 0x0F87 ], [ 0x0F90, 0x0F97 ],
      [ 0x0F99, 0x0FBC ], [ 0x0FC6, 0x0FC6 ], [ 0x102D, 0x1030 ],
      [ 0x1032, 0x1032 ], [ 0x1036, 0x1037 ], [ 0x1039, 0x1039 ],
      [ 0x1058, 0x1059 ], [ 0x1160, 0x11FF ], [ 0x135F, 0x135F ],
      [ 0x1712, 0x1714 ], [ 0x1732, 0x1734 ], [ 0x1752, 0x1753 ],
      [ 0x1772, 0x1773 ], [ 0x17B4, 0x17B5 ], [ 0x17B7, 0x17BD ],
      [ 0x17C6, 0x17C6 ], [ 0x17C9, 0x17D3 ], [ 0x17DD, 0x17DD ],
      [ 0x180B, 0x180D ], [ 0x18A9, 0x18A9 ], [ 0x1920, 0x1922 ],
      [ 0x1927, 0x1928 ], [ 0x1932, 0x1932 ], [ 0x1939, 0x193B ],
      [ 0x1A17, 0x1A18 ], [ 0x1B00, 0x1B03 ], [ 0x1B34, 0x1B34 ],
      [ 0x1B36, 0x1B3A ], [ 0x1B3C, 0x1B3C ], [ 0x1B42, 0x1B42 ],
      [ 0x1B6B, 0x1B73 ], [ 0x1DC0, 0x1DCA ], [ 0x1DFE, 0x1DFF ],
      [ 0x200B, 0x200F ], [ 0x202A, 0x202E ], [ 0x2060, 0x2063 ],
      [ 0x206A, 0x206F ], [ 0x20D0, 0x20EF ], [ 0x302A, 0x302F ],
      [ 0x3099, 0x309A ], [ 0xA806, 0xA806 ], [ 0xA80B, 0xA80B ],
      [ 0xA825, 0xA826 ], [ 0xFB1E, 0xFB1E ], [ 0xFE00, 0xFE0F ],
      [ 0xFE20, 0xFE23 ], [ 0xFEFF, 0xFEFF ], [ 0xFFF9, 0xFFFB ],
      [ 0x10A01, 0x10A03 ], [ 0x10A05, 0x10A06 ], [ 0x10A0C, 0x10A0F ],
      [ 0x10A38, 0x10A3A ], [ 0x10A3F, 0x10A3F ], [ 0x1D167, 0x1D169 ],
      [ 0x1D173, 0x1D182 ], [ 0x1D185, 0x1D18B ], [ 0x1D1AA, 0x1D1AD ],
      [ 0x1D242, 0x1D244 ], [ 0xE0001, 0xE0001 ], [ 0xE0020, 0xE007F ],
      [ 0xE0100, 0xE01EF ]
  ];
  
  // Sorted list of non-overlapping intervals of East Asian Ambiguous characters
  // generated by "uniset +WIDTH-A -cat=Me -cat=Mn -cat=Cf c"
  lib.wc.ambiguous = [
      [ 0x00A1, 0x00A1 ], [ 0x00A4, 0x00A4 ], [ 0x00A7, 0x00A8 ],
      [ 0x00AA, 0x00AA ], [ 0x00AE, 0x00AE ], [ 0x00B0, 0x00B4 ],
      [ 0x00B6, 0x00BA ], [ 0x00BC, 0x00BF ], [ 0x00C6, 0x00C6 ],
      [ 0x00D0, 0x00D0 ], [ 0x00D7, 0x00D8 ], [ 0x00DE, 0x00E1 ],
      [ 0x00E6, 0x00E6 ], [ 0x00E8, 0x00EA ], [ 0x00EC, 0x00ED ],
      [ 0x00F0, 0x00F0 ], [ 0x00F2, 0x00F3 ], [ 0x00F7, 0x00FA ],
      [ 0x00FC, 0x00FC ], [ 0x00FE, 0x00FE ], [ 0x0101, 0x0101 ],
      [ 0x0111, 0x0111 ], [ 0x0113, 0x0113 ], [ 0x011B, 0x011B ],
      [ 0x0126, 0x0127 ], [ 0x012B, 0x012B ], [ 0x0131, 0x0133 ],
      [ 0x0138, 0x0138 ], [ 0x013F, 0x0142 ], [ 0x0144, 0x0144 ],
      [ 0x0148, 0x014B ], [ 0x014D, 0x014D ], [ 0x0152, 0x0153 ],
      [ 0x0166, 0x0167 ], [ 0x016B, 0x016B ], [ 0x01CE, 0x01CE ],
      [ 0x01D0, 0x01D0 ], [ 0x01D2, 0x01D2 ], [ 0x01D4, 0x01D4 ],
      [ 0x01D6, 0x01D6 ], [ 0x01D8, 0x01D8 ], [ 0x01DA, 0x01DA ],
      [ 0x01DC, 0x01DC ], [ 0x0251, 0x0251 ], [ 0x0261, 0x0261 ],
      [ 0x02C4, 0x02C4 ], [ 0x02C7, 0x02C7 ], [ 0x02C9, 0x02CB ],
      [ 0x02CD, 0x02CD ], [ 0x02D0, 0x02D0 ], [ 0x02D8, 0x02DB ],
      [ 0x02DD, 0x02DD ], [ 0x02DF, 0x02DF ], [ 0x0391, 0x03A1 ],
      [ 0x03A3, 0x03A9 ], [ 0x03B1, 0x03C1 ], [ 0x03C3, 0x03C9 ],
      [ 0x0401, 0x0401 ], [ 0x0410, 0x044F ], [ 0x0451, 0x0451 ],
      [ 0x2010, 0x2010 ], [ 0x2013, 0x2016 ], [ 0x2018, 0x2019 ],
      [ 0x201C, 0x201D ], [ 0x2020, 0x2022 ], [ 0x2024, 0x2027 ],
      [ 0x2030, 0x2030 ], [ 0x2032, 0x2033 ], [ 0x2035, 0x2035 ],
      [ 0x203B, 0x203B ], [ 0x203E, 0x203E ], [ 0x2074, 0x2074 ],
      [ 0x207F, 0x207F ], [ 0x2081, 0x2084 ], [ 0x20AC, 0x20AC ],
      [ 0x2103, 0x2103 ], [ 0x2105, 0x2105 ], [ 0x2109, 0x2109 ],
      [ 0x2113, 0x2113 ], [ 0x2116, 0x2116 ], [ 0x2121, 0x2122 ],
      [ 0x2126, 0x2126 ], [ 0x212B, 0x212B ], [ 0x2153, 0x2154 ],
      [ 0x215B, 0x215E ], [ 0x2160, 0x216B ], [ 0x2170, 0x2179 ],
      [ 0x2190, 0x2199 ], [ 0x21B8, 0x21B9 ], [ 0x21D2, 0x21D2 ],
      [ 0x21D4, 0x21D4 ], [ 0x21E7, 0x21E7 ], [ 0x2200, 0x2200 ],
      [ 0x2202, 0x2203 ], [ 0x2207, 0x2208 ], [ 0x220B, 0x220B ],
      [ 0x220F, 0x220F ], [ 0x2211, 0x2211 ], [ 0x2215, 0x2215 ],
      [ 0x221A, 0x221A ], [ 0x221D, 0x2220 ], [ 0x2223, 0x2223 ],
      [ 0x2225, 0x2225 ], [ 0x2227, 0x222C ], [ 0x222E, 0x222E ],
      [ 0x2234, 0x2237 ], [ 0x223C, 0x223D ], [ 0x2248, 0x2248 ],
      [ 0x224C, 0x224C ], [ 0x2252, 0x2252 ], [ 0x2260, 0x2261 ],
      [ 0x2264, 0x2267 ], [ 0x226A, 0x226B ], [ 0x226E, 0x226F ],
      [ 0x2282, 0x2283 ], [ 0x2286, 0x2287 ], [ 0x2295, 0x2295 ],
      [ 0x2299, 0x2299 ], [ 0x22A5, 0x22A5 ], [ 0x22BF, 0x22BF ],
      [ 0x2312, 0x2312 ], [ 0x2460, 0x24E9 ], [ 0x24EB, 0x254B ],
      [ 0x2550, 0x2573 ], [ 0x2580, 0x258F ], [ 0x2592, 0x2595 ],
      [ 0x25A0, 0x25A1 ], [ 0x25A3, 0x25A9 ], [ 0x25B2, 0x25B3 ],
      [ 0x25B6, 0x25B7 ], [ 0x25BC, 0x25BD ], [ 0x25C0, 0x25C1 ],
      [ 0x25C6, 0x25C8 ], [ 0x25CB, 0x25CB ], [ 0x25CE, 0x25D1 ],
      [ 0x25E2, 0x25E5 ], [ 0x25EF, 0x25EF ], [ 0x2605, 0x2606 ],
      [ 0x2609, 0x2609 ], [ 0x260E, 0x260F ], [ 0x2614, 0x2615 ],
      [ 0x261C, 0x261C ], [ 0x261E, 0x261E ], [ 0x2640, 0x2640 ],
      [ 0x2642, 0x2642 ], [ 0x2660, 0x2661 ], [ 0x2663, 0x2665 ],
      [ 0x2667, 0x266A ], [ 0x266C, 0x266D ], [ 0x266F, 0x266F ],
      [ 0x273D, 0x273D ], [ 0x2776, 0x277F ], [ 0xE000, 0xF8FF ],
      [ 0xFFFD, 0xFFFD ], [ 0xF0000, 0xFFFFD ], [ 0x100000, 0x10FFFD ]
  ];
  
  /**
   * Binary search to check if the given unicode character is a space character.
   *
   * @param {interger} ucs A unicode character code.
   *
   * @return {boolean} True if the given character is a space character; false
   *     otherwise.
   */
  lib.wc.isSpace = function(ucs) {
    // Auxiliary function for binary search in interval table.
    var min = 0, max = lib.wc.combining.length - 1;
    var mid;
  
    if (ucs < lib.wc.combining[0][0] || ucs > lib.wc.combining[max][1])
      return false;
    while (max >= min) {
      mid = Math.floor((min + max) / 2);
      if (ucs > lib.wc.combining[mid][1]) {
        min = mid + 1;
      } else if (ucs < lib.wc.combining[mid][0]) {
        max = mid - 1;
      } else {
        return true;
      }
    }
  
    return false;
  };
  
  /**
   * Auxiliary function for checking if the given unicode character is a East
   * Asian Ambiguous character.
   *
   * @param {interger} ucs A unicode character code.
   *
   * @return {boolean} True if the given character is a East Asian Ambiguous
   * character.
   */
  lib.wc.isCjkAmbiguous = function(ucs) {
    var min = 0, max = lib.wc.ambiguous.length - 1;
    var mid;
  
    if (ucs < lib.wc.ambiguous[0][0] || ucs > lib.wc.ambiguous[max][1])
      return false;
    while (max >= min) {
      mid = Math.floor((min + max) / 2);
      if (ucs > lib.wc.ambiguous[mid][1]) {
        min = mid + 1;
      } else if (ucs < lib.wc.ambiguous[mid][0]) {
        max = mid - 1;
      } else {
        return true;
      }
    }
  
    return false;
  };
  
  /**
   * Determine the column width of the given character.
   *
   * @param {integer} ucs A unicode character code.
   *
   * @return {integer} The column width of the given character.
   */
  lib.wc.charWidth = function(ucs) {
    if (lib.wc.regardCjkAmbiguous) {
      return lib.wc.charWidthRegardAmbiguous(ucs);
    } else {
      return lib.wc.charWidthDisregardAmbiguous(ucs);
    }
  };
  
  /**
   * Determine the column width of the given character without considering East
   * Asian Ambiguous characters.
   *
   * @param {integer} ucs A unicode character code.
   *
   * @return {integer} The column width of the given character.
   */
  lib.wc.charWidthDisregardAmbiguous = function(ucs) {
    // Test for 8-bit control characters.
    if (ucs === 0)
      return lib.wc.nulWidth;
    if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0))
      return lib.wc.controlWidth;
  
    // Optimize for ASCII characters.
    if (ucs < 0x7f)
      return 1;
  
    // Binary search in table of non-spacing characters.
    if (lib.wc.isSpace(ucs))
      return 0;
  
    // If we arrive here, ucs is not a combining or C0/C1 control character.
    return 1 +
      (ucs >= 0x1100 &&
       (ucs <= 0x115f ||             // Hangul Jamo init. consonants
        ucs == 0x2329 || ucs == 0x232a ||
        (ucs >= 0x2e80 && ucs <= 0xa4cf &&
         ucs != 0x303f) ||           // CJK ... Yi
        (ucs >= 0xac00 && ucs <= 0xd7a3) ||  // Hangul Syllables
        (ucs >= 0xf900 && ucs <= 0xfaff) ||  // CJK Compatibility Ideographs
        (ucs >= 0xfe10 && ucs <= 0xfe19) ||  // Vertical forms
        (ucs >= 0xfe30 && ucs <= 0xfe6f) ||  // CJK Compatibility Forms
        (ucs >= 0xff00 && ucs <= 0xff60) ||  // Fullwidth Forms
        (ucs >= 0xffe0 && ucs <= 0xffe6) ||
        (ucs >= 0x20000 && ucs <= 0x2fffd) ||
        (ucs >= 0x30000 && ucs <= 0x3fffd)));
    // TODO: emoji characters usually require space for wide characters although
    // East Asian width spec says nothing. Should we add special cases for them?
  };
  
  /**
   * Determine the column width of the given character considering East Asian
   * Ambiguous characters.
   *
   * @param {integer} ucs A unicode character code.
   *
   * @return {integer} The column width of the given character.
   */
  lib.wc.charWidthRegardAmbiguous = function(ucs) {
    if (lib.wc.isCjkAmbiguous(ucs))
      return lib.wc.cjkAmbiguousWidth;
  
    return lib.wc.charWidthDisregardAmbiguous(ucs);
  };
  
  /**
   * Determine the column width of the given string.
   *
   * @param {string} str A string.
   *
   * @return {integer} The column width of the given string.
   */
  lib.wc.strWidth = function(str) {
    var width, rv = 0;
  
    for (var i = 0; i < str.length;) {
      var codePoint = str.codePointAt(i);
      width = lib.wc.charWidth(codePoint);
      if (width < 0)
        return -1;
      rv += width;
      i += (codePoint <= 0xffff) ? 1 : 2;
    }
  
    return rv;
  };
  
  /**
   * Get the substring at the given column offset of the given column width.
   *
   * @param {string} str The string to get substring from.
   * @param {integer} start The starting column offset to get substring.
   * @param {integer} opt_width The column width of the substring.
   *
   * @return {string} The substring.
   */
  lib.wc.substr = function(str, start, opt_width) {
    var startIndex, endIndex, width;
  
    for (startIndex = 0, width = 0; startIndex < str.length; startIndex++) {
      width += lib.wc.charWidth(str.charCodeAt(startIndex));
      if (width > start)
        break;
    }
  
    if (opt_width != undefined) {
      for (endIndex = startIndex, width = 0;
           endIndex < str.length && width < opt_width;
           width += lib.wc.charWidth(str.charCodeAt(endIndex)), endIndex++);
      if (width > opt_width)
        endIndex--;
      return str.substring(startIndex, endIndex);
    }
  
    return str.substr(startIndex);
  };
  
  /**
   * Get substring at the given start and end column offset.
   *
   * @param {string} str The string to get substring from.
   * @param {integer} start The starting column offset.
   * @param {integer} end The ending column offset.
   *
   * @return {string} The substring.
   */
  lib.wc.substring = function(str, start, end) {
    return lib.wc.substr(str, start, end - start);
  };
  lib.resource.add('libdot/changelog/version', 'text/plain',
  '1.9' +
  ''
  );
  
  lib.resource.add('libdot/changelog/date', 'text/plain',
  '2014-05-27' +
  ''
  );
  
  // SOURCE FILE: hterm/js/hterm.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  lib.rtdep('lib.Storage');
  
  /**
   * @fileoverview Declares the hterm.* namespace and some basic shared utilities
   * that are too small to deserve dedicated files.
   */
  var hterm = {};
  
  /**
   * The type of window hosting hterm.
   *
   * This is set as part of hterm.init().  The value is invalid until
   * initialization completes.
   */
  hterm.windowType = null;
  
  /**
   * Warning message to display in the terminal when browser zoom is enabled.
   *
   * You can replace it with your own localized message.
   */
  hterm.zoomWarningMessage = 'ZOOM != 100%';
  
  /**
   * Brief overlay message displayed when text is copied to the clipboard.
   *
   * By default it is the unicode BLACK SCISSORS character, but you can
   * replace it with your own localized message.
   *
   * This is only displayed when the 'enable-clipboard-notice' preference
   * is enabled.
   */
  hterm.notifyCopyMessage = '\u2702';
  
  
  /**
   * Text shown in a desktop notification for the terminal
   * bell.  \u226a is a unicode EIGHTH NOTE, %(title) will
   * be replaced by the terminal title.
   */
  hterm.desktopNotificationTitle = '\u266A %(title) \u266A';
  
  /**
   * List of known hterm test suites.
   *
   * A test harness should ensure that they all exist before running.
   */
  hterm.testDeps = ['hterm.ScrollPort.Tests', 'hterm.Screen.Tests',
                    'hterm.Terminal.Tests', 'hterm.VT.Tests',
                    'hterm.VT.CannedTests'];
  
  /**
   * The hterm init function, registered with lib.registerInit().
   *
   * This is called during lib.init().
   *
   * @param {function} onInit The function lib.init() wants us to invoke when
   *     initialization is complete.
   */
  lib.registerInit('hterm', function(onInit) {
    function onWindow(window) {
      hterm.windowType = window.type;
      setTimeout(onInit, 0);
    }
  
    function onTab(tab) {
      if (tab && window.chrome) {
        chrome.windows.get(tab.windowId, null, onWindow);
      } else {
        // TODO(rginda): This is where we end up for a v1 app's background page.
        // Maybe windowType = 'none' would be more appropriate, or something.
        hterm.windowType = 'normal';
        setTimeout(onInit, 0);
      }
    }
  
    if (!hterm.defaultStorage) {
      var ary = navigator.userAgent.match(/\sChrome\/(\d\d)/);
      var version = ary ? parseInt(ary[1]) : -1;
      if (window.chrome && chrome.storage && chrome.storage.sync &&
          version > 21) {
        hterm.defaultStorage = new lib.Storage.Chrome(chrome.storage.sync);
      } else {
        hterm.defaultStorage = new lib.Storage.Local();
      }
    }
  
    // The chrome.tabs API is not supported in packaged apps, and detecting if
    // you're a packaged app is a little awkward.
    var isPackagedApp = false;
    if (window.chrome && chrome.runtime && chrome.runtime.getManifest) {
      var manifest = chrome.runtime.getManifest();
      var isPackagedApp = manifest.app && manifest.app.background;
    }
  
    if (isPackagedApp) {
      // Packaged apps are never displayed in browser tabs.
      setTimeout(onWindow.bind(null, {type: 'popup'}), 0);
    } else {
      if (window.chrome && chrome.tabs) {
        // The getCurrent method gets the tab that is "currently running", not the
        // topmost or focused tab.
        chrome.tabs.getCurrent(onTab);
      } else {
        setTimeout(onWindow.bind(null, {type: 'normal'}), 0);
      }
    }
  });
  
  /**
   * Return decimal { width, height } for a given dom node.
   */
  hterm.getClientSize = function(dom) {
    return dom.getBoundingClientRect();
  };
  
  /**
   * Return decimal width for a given dom node.
   */
  hterm.getClientWidth = function(dom) {
    return dom.getBoundingClientRect().width;
  };
  
  /**
   * Return decimal height for a given dom node.
   */
  hterm.getClientHeight = function(dom) {
    return dom.getBoundingClientRect().height;
  };
  
  /**
   * Copy the current selection to the system clipboard.
   *
   * @param {HTMLDocument} The document with the selection to copy.
   */
  hterm.copySelectionToClipboard = function(document) {
    try {
      document.execCommand('copy');
    } catch (firefoxException) {
      // Ignore this. FF throws an exception if there was an error, even though
      // the spec says just return false.
    }
  };
  
  /**
   * Paste the system clipboard into the element with focus.
   *
   * @param {HTMLDocument} The document to paste into.
   */
  hterm.pasteFromClipboard = function(document) {
    try {
      document.execCommand('paste');
    } catch (firefoxException) {
      // Ignore this. FF throws an exception if there was an error, even though
      // the spec says just return false.
    }
  };
  
  /**
   * Constructor for a hterm.Size record.
   *
   * Instances of this class have public read/write members for width and height.
   *
   * @param {integer} width The width of this record.
   * @param {integer} height The height of this record.
   */
  hterm.Size = function(width, height) {
    this.width = width;
    this.height = height;
  };
  
  /**
   * Adjust the width and height of this record.
   *
   * @param {integer} width The new width of this record.
   * @param {integer} height The new height of this record.
   */
  hterm.Size.prototype.resize = function(width, height) {
    this.width = width;
    this.height = height;
  };
  
  /**
   * Return a copy of this record.
   *
   * @return {hterm.Size} A new hterm.Size instance with the same width and
   * height.
   */
  hterm.Size.prototype.clone = function() {
    return new hterm.Size(this.width, this.height);
  };
  
  /**
   * Set the height and width of this instance based on another hterm.Size.
   *
   * @param {hterm.Size} that The object to copy from.
   */
  hterm.Size.prototype.setTo = function(that) {
    this.width = that.width;
    this.height = that.height;
  };
  
  /**
   * Test if another hterm.Size instance is equal to this one.
   *
   * @param {hterm.Size} that The other hterm.Size instance.
   * @return {boolen} True if both instances have the same width/height, false
   *     otherwise.
   */
  hterm.Size.prototype.equals = function(that) {
    return this.width == that.width && this.height == that.height;
  };
  
  /**
   * Return a string representation of this instance.
   *
   * @return {string} A string that identifies the width and height of this
   *     instance.
   */
  hterm.Size.prototype.toString = function() {
    return '[hterm.Size: ' + this.width + ', ' + this.height + ']';
  };
  
  /**
   * Constructor for a hterm.RowCol record.
   *
   * Instances of this class have public read/write members for row and column.
   *
   * This class includes an 'overflow' bit which is use to indicate that the an
   * attempt has been made to move the cursor column passed the end of the
   * screen.  When this happens we leave the cursor column set to the last column
   * of the screen but set the overflow bit.  In this state cursor movement
   * happens normally, but any attempt to print new characters causes a cr/lf
   * first.
   *
   * @param {integer} row The row of this record.
   * @param {integer} column The column of this record.
   * @param {boolean} opt_overflow Optional boolean indicating that the RowCol
   *     has overflowed.
   */
  hterm.RowCol = function(row, column, opt_overflow) {
    this.row = row;
    this.column = column;
    this.overflow = !!opt_overflow;
  };
  
  /**
   * Adjust the row and column of this record.
   *
   * @param {integer} row The new row of this record.
   * @param {integer} column The new column of this record.
   * @param {boolean} opt_overflow Optional boolean indicating that the RowCol
   *     has overflowed.
   */
  hterm.RowCol.prototype.move = function(row, column, opt_overflow) {
    this.row = row;
    this.column = column;
    this.overflow = !!opt_overflow;
  };
  
  /**
   * Return a copy of this record.
   *
   * @return {hterm.RowCol} A new hterm.RowCol instance with the same row and
   * column.
   */
  hterm.RowCol.prototype.clone = function() {
    return new hterm.RowCol(this.row, this.column, this.overflow);
  };
  
  /**
   * Set the row and column of this instance based on another hterm.RowCol.
   *
   * @param {hterm.RowCol} that The object to copy from.
   */
  hterm.RowCol.prototype.setTo = function(that) {
    this.row = that.row;
    this.column = that.column;
    this.overflow = that.overflow;
  };
  
  /**
   * Test if another hterm.RowCol instance is equal to this one.
   *
   * @param {hterm.RowCol} that The other hterm.RowCol instance.
   * @return {boolen} True if both instances have the same row/column, false
   *     otherwise.
   */
  hterm.RowCol.prototype.equals = function(that) {
    return (this.row == that.row && this.column == that.column &&
            this.overflow == that.overflow);
  };
  
  /**
   * Return a string representation of this instance.
   *
   * @return {string} A string that identifies the row and column of this
   *     instance.
   */
  hterm.RowCol.prototype.toString = function() {
    return ('[hterm.RowCol: ' + this.row + ', ' + this.column + ', ' +
            this.overflow + ']');
  };
  // SOURCE FILE: hterm/js/hterm_frame.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  lib.rtdep('lib.f');
  
  /**
   * First draft of the interface between the terminal and a third party dialog.
   *
   * This is rough.  It's just the terminal->dialog layer.  To complete things
   * we'll also need a command->terminal layer.  That will have to facilitate
   * command->terminal->dialog or direct command->dialog communication.
   *
   * I imagine this class will change significantly when that happens.
   */
  
  /**
   * Construct a new frame for the given terminal.
   *
   * @param terminal {hterm.Terminal} The parent terminal object.
   * @param url {String} The url to load in the frame.
   * @param opt_options {Object} Optional options for the frame.  Not implemented.
   */
  hterm.Frame = function(terminal, url, opt_options) {
    this.terminal_ = terminal;
    this.div_ = terminal.div_;
    this.url = url;
    this.options = opt_options || {};
    this.iframe_ = null;
    this.container_ = null;
    this.messageChannel_ = null;
  };
  
  /**
   * Handle messages from the iframe.
   */
  hterm.Frame.prototype.onMessage_ = function(e) {
    if (e.data.name != 'ipc-init-ok') {
      console.log('Unknown message from frame:', e.data);
      return;
    }
  
    this.sendTerminalInfo_();
    this.messageChannel_.port1.onmessage = this.onMessage.bind(this);
    this.onLoad();
  };
  
  /**
   * Clients could override this, I guess.
   *
   * It doesn't support multiple listeners, but I'm not sure that would make sense
   * here.  It's probably better to speak directly to our parents.
   */
  hterm.Frame.prototype.onMessage = function() {};
  
  /**
   * Handle iframe onLoad event.
   */
  hterm.Frame.prototype.onLoad_ = function() {
    this.messageChannel_ = new MessageChannel();
    this.messageChannel_.port1.onmessage = this.onMessage_.bind(this);
    this.messageChannel_.port1.start();
    this.iframe_.contentWindow.postMessage(
        {name: 'ipc-init', argv: [{messagePort: this.messageChannel_.port2}]},
        [this.messageChannel_.port2], this.url);
  };
  
  /**
   * Clients may override this.
   */
  hterm.Frame.prototype.onLoad = function() {};
  
  /**
   * Sends the terminal-info message to the iframe.
   */
  hterm.Frame.prototype.sendTerminalInfo_ = function() {
    lib.f.getAcceptLanguages(function(languages) {
        this.postMessage('terminal-info', [{
           acceptLanguages: languages,
           foregroundColor: this.terminal_.getForegroundColor(),
           backgroundColor: this.terminal_.getBackgroundColor(),
           cursorColor: this.terminal_.getCursorColor(),
           fontSize: this.terminal_.getFontSize(),
           fontFamily: this.terminal_.getFontFamily(),
           baseURL: lib.f.getURL('/')
            }]
          );
      }.bind(this));
  };
  
  /**
   * User clicked the close button on the frame decoration.
   */
  hterm.Frame.prototype.onCloseClicked_ = function() {
    this.close();
  };
  
  /**
   * Close this frame.
   */
  hterm.Frame.prototype.close = function() {
    if (!this.container_ || !this.container_.parentNode)
        return;
  
    this.container_.parentNode.removeChild(this.container_);
    this.onClose();
  };
  
  
  /**
   * Clients may override this.
   */
  hterm.Frame.prototype.onClose = function() {};
  
  /**
   * Send a message to the iframe.
   */
  hterm.Frame.prototype.postMessage = function(name, argv) {
    if (!this.messageChannel_)
      throw new Error('Message channel is not set up.');
  
    this.messageChannel_.port1.postMessage({name: name, argv: argv});
  };
  
  /**
   * Show the UI for this frame.
   *
   * The iframe src is not loaded until this method is called.
   */
  hterm.Frame.prototype.show = function() {
    var self = this;
  
    function opt(name, defaultValue) {
      if (name in self.options)
        return self.options[name];
  
      return defaultValue;
    }
  
    var self = this;
  
    if (this.container_ && this.container_.parentNode) {
      console.error('Frame already visible');
      return;
    }
  
    var headerHeight = '16px';
  
    var divSize = hterm.getClientSize(this.div_);
  
    var width = opt('width', 640);
    var height = opt('height', 480);
    var left = (divSize.width - width) / 2;
    var top = (divSize.height - height) / 2;
  
    var document = this.terminal_.document_;
  
    var container = this.container_ = document.createElement('div');
    container.style.cssText = (
        'position: absolute;' +
        'display: -webkit-flex;' +
        '-webkit-flex-direction: column;' +
        'top: 10%;' +
        'left: 4%;' +
        'width: 90%;' +
        'height: 80%;' +
        'box-shadow: 0 0 2px ' + this.terminal_.getForegroundColor() + ';' +
        'border: 2px ' + this.terminal_.getForegroundColor() + ' solid;');
  
    var header = document.createElement('div');
    header.style.cssText = (
        'display: -webkit-flex;' +
        '-webkit-justify-content: flex-end;' +
        'height: ' + headerHeight + ';' +
        'background-color: ' + this.terminal_.getForegroundColor() + ';' +
        'color: ' + this.terminal_.getBackgroundColor() + ';' +
        'font-size: 16px;' +
        'font-family: ' + this.terminal_.getFontFamily());
    container.appendChild(header);
  
    if (false) {
      // No use for the close button.
      var button = document.createElement('div');
      button.setAttribute('role', 'button');
      button.style.cssText = (
          'margin-top: -3px;' +
          'margin-right: 3px;' +
          'cursor: pointer;');
      button.textContent = '\u2a2f';
      button.addEventListener('click', this.onCloseClicked_.bind(this));
      header.appendChild(button);
    }
  
    var iframe = this.iframe_ = document.createElement('iframe');
    iframe.onload = this.onLoad_.bind(this);
    iframe.style.cssText = (
        'display: -webkit-flex;' +
        '-webkit-flex: 1;' +
        'width: 100%');
    iframe.setAttribute('src', this.url);
    iframe.setAttribute('seamless', true);
    container.appendChild(iframe);
  
    this.div_.appendChild(container);
  };
  // SOURCE FILE: hterm/js/hterm_keyboard.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  lib.rtdep('hterm.Keyboard.KeyMap');
  
  /**
   * Keyboard handler.
   *
   * Consumes onKey* events and invokes onVTKeystroke on the associated
   * hterm.Terminal object.
   *
   * See also: [XTERM] as referenced in vt.js.
   *
   * @param {hterm.Terminal} The Terminal object associated with this keyboard.
   */
  hterm.Keyboard = function(terminal) {
    // The parent vt interpreter.
    this.terminal = terminal;
  
    // The element we're currently capturing keyboard events for.
    this.keyboardElement_ = null;
  
    // The event handlers we are interested in, and their bound callbacks, saved
    // so they can be uninstalled with removeEventListener, when required.
    this.handlers_ = [
        ['blur', this.onBlur_.bind(this)],
        ['keydown', this.onKeyDown_.bind(this)],
        ['keypress', this.onKeyPress_.bind(this)],
        ['keyup', this.onKeyUp_.bind(this)],
        ['textInput', this.onTextInput_.bind(this)]
    ];
  
    /**
     * The current key map.
     */
    this.keyMap = new hterm.Keyboard.KeyMap(this);
  
    this.bindings = new hterm.Keyboard.Bindings(this);
  
    /**
     * none: Disable any AltGr related munging.
     * ctrl-alt: Assume Ctrl+Alt means AltGr.
     * left-alt: Assume left Alt means AltGr.
     * right-alt: Assume right Alt means AltGr.
     */
    this.altGrMode = 'none';
  
    /**
     * If true, Shift-Insert will fall through to the browser as a paste.
     * If false, the keystroke will be sent to the host.
     */
    this.shiftInsertPaste = true;
  
    /**
     * If true, home/end will control the terminal scrollbar and shift home/end
     * will send the VT keycodes.  If false then home/end sends VT codes and
     * shift home/end scrolls.
     */
    this.homeKeysScroll = false;
  
    /**
     * Same as above, except for page up/page down.
     */
    this.pageKeysScroll = false;
  
    /**
     * If true, Ctrl-Plus/Minus/Zero controls zoom.
     * If false, Ctrl-Shift-Plus/Minus/Zero controls zoom, Ctrl-Minus sends ^_,
     * Ctrl-Plus/Zero do nothing.
     */
    this.ctrlPlusMinusZeroZoom = true;
  
    /**
     * Ctrl+C copies if true, sends ^C to host if false.
     * Ctrl+Shift+C sends ^C to host if true, copies if false.
     */
    this.ctrlCCopy = false;
  
    /**
     * Ctrl+V pastes if true, sends ^V to host if false.
     * Ctrl+Shift+V sends ^V to host if true, pastes if false.
     */
    this.ctrlVPaste = false;
  
    /**
     * Enable/disable application keypad.
     *
     * This changes the way numeric keys are sent from the keyboard.
     */
    this.applicationKeypad = false;
  
    /**
     * Enable/disable the application cursor mode.
     *
     * This changes the way cursor keys are sent from the keyboard.
     */
    this.applicationCursor = false;
  
    /**
     * If true, the backspace should send BS ('\x08', aka ^H).  Otherwise
     * the backspace key should send '\x7f'.
     */
    this.backspaceSendsBackspace = false;
  
    /**
     * The encoding method for data sent to the host.
     */
    this.characterEncoding = 'utf-8';
  
    /**
     * Set whether the meta key sends a leading escape or not.
     */
    this.metaSendsEscape = true;
  
    /**
     * Set whether meta-V gets passed to host.
     */
    this.passMetaV = true;
  
    /**
     * Controls how the alt key is handled.
     *
     *  escape....... Send an ESC prefix.
     *  8-bit........ Add 128 to the unshifted character as in xterm.
     *  browser-key.. Wait for the keypress event and see what the browser says.
     *                (This won't work well on platforms where the browser
     *                 performs a default action for some alt sequences.)
     *
     * This setting only matters when alt is distinct from meta (altIsMeta is
     * false.)
     */
    this.altSendsWhat = 'escape';
  
    /**
     * Set whether the alt key acts as a meta key, instead of producing 8-bit
     * characters.
     *
     * True to enable, false to disable, null to autodetect based on platform.
     */
    this.altIsMeta = false;
  
    /**
     * If true, tries to detect DEL key events that are from alt-backspace on
     * Chrome OS vs from a true DEL key press.
     *
     * Background: At the time of writing, on Chrome OS, alt-backspace is mapped
     * to DEL. Some users may be happy with this, but others may be frustrated
     * that it's impossible to do meta-backspace. If the user enables this pref,
     * we use a trick to tell a true DEL keypress from alt-backspace: on
     * alt-backspace, we will see the alt key go down, then get a DEL keystroke
     * that indicates that alt is not pressed. See http://crbug.com/174410 .
     */
    this.altBackspaceIsMetaBackspace = false;
  
    /**
     * Used to keep track of the current alt-key state, which is necessary for
     * the altBackspaceIsMetaBackspace preference above and for the altGrMode
     * preference.  This is a bitmap with where bit positions correspond to the
     * "location" property of the key event.
     */
    this.altKeyPressed = 0;
  
    /**
     * If true, Chrome OS media keys will be mapped to their F-key equivalent.
     * E.g. "Back" will be mapped to F1. If false, Chrome will handle the keys.
     */
    this.mediaKeysAreFKeys = false;
  
    /**
     * Holds the previous setting of altSendsWhat when DECSET 1039 is used. When
     * DECRST 1039 is used, altSendsWhat is changed back to this and this is
     * nulled out.
     */
    this.previousAltSendsWhat_ = null;
  };
  
  /**
   * Special handling for keyCodes in a keyboard layout.
   */
  hterm.Keyboard.KeyActions = {
    /**
     * Call preventDefault and stopPropagation for this key event and nothing
     * else.
     */
    CANCEL: new String('CANCEL'),
  
    /**
     * This performs the default terminal action for the key.  If used in the
     * 'normal' action and the the keystroke represents a printable key, the
     * character will be sent to the host.  If used in one of the modifier
     * actions, the terminal will perform the normal action after (possibly)
     * altering it.
     *
     *  - If the normal sequence starts with CSI, the sequence will be adjusted
     *    to include the modifier parameter as described in [XTERM] in the final
     *    table of the "PC-Style Function Keys" section.
     *
     *  - If the control key is down and the key represents a printable character,
     *    and the uppercase version of the unshifted keycap is between
     *    64 (ASCII '@') and 95 (ASCII '_'), then the uppercase version of the
     *    unshifted keycap minus 64 is sent.  This makes '^@' send '\x00' and
     *    '^_' send '\x1f'.  (Note that one higher that 0x1f is 0x20, which is
     *    the first printable ASCII value.)
     *
     *  - If the alt key is down and the key represents a printable character then
     *    the value of the character is shifted up by 128.
     *
     *  - If meta is down and configured to send an escape, '\x1b' will be sent
     *    before the normal action is performed.
     */
    DEFAULT: new String('DEFAULT'),
  
    /**
     * Causes the terminal to opt out of handling the key event, instead letting
     * the browser deal with it.
     */
    PASS: new String('PASS'),
  
    /**
     * Insert the first or second character of the keyCap, based on e.shiftKey.
     * The key will be handled in onKeyDown, and e.preventDefault() will be
     * called.
     *
     * It is useful for a modified key action, where it essentially strips the
     * modifier while preventing the browser from reacting to the key.
     */
    STRIP: new String('STRIP')
  };
  
  /**
   * Encode a string according to the 'send-encoding' preference.
   */
  hterm.Keyboard.prototype.encode = function(str) {
    if (this.characterEncoding == 'utf-8')
      return this.terminal.vt.encodeUTF8(str);
  
    return str;
  };
  
  /**
   * Capture keyboard events sent to the associated element.
   *
   * This enables the keyboard.  Captured events are consumed by this class
   * and will not perform their default action or bubble to other elements.
   *
   * Passing a null element will uninstall the keyboard handlers.
   *
   * @param {HTMLElement} element The element whose events should be captured, or
   *     null to disable the keyboard.
   */
  hterm.Keyboard.prototype.installKeyboard = function(element) {
    if (element == this.keyboardElement_)
      return;
  
    if (element && this.keyboardElement_)
      this.installKeyboard(null);
  
    for (var i = 0; i < this.handlers_.length; i++) {
      var handler = this.handlers_[i];
      if (element) {
        element.addEventListener(handler[0], handler[1]);
      } else {
        this.keyboardElement_.removeEventListener(handler[0], handler[1]);
      }
    }
  
    this.keyboardElement_ = element;
  };
  
  /**
   * Disable keyboard event capture.
   *
   * This will allow the browser to process key events normally.
   */
  hterm.Keyboard.prototype.uninstallKeyboard = function() {
    this.installKeyboard(null);
  };
  
  /**
   * Handle onTextInput events.
   *
   * We're not actually supposed to get these, but we do on the Mac in the case
   * where a third party app sends synthetic keystrokes to Chrome.
   */
  hterm.Keyboard.prototype.onTextInput_ = function(e) {
    if (!e.data)
      return;
  
    e.data.split('').forEach(this.terminal.onVTKeystroke.bind(this.terminal));
  };
  
  /**
   * Handle onKeyPress events.
   */
  hterm.Keyboard.prototype.onKeyPress_ = function(e) {
    var code;
  
    var key = String.fromCharCode(e.which);
    var lowerKey = key.toLowerCase();
    if ((e.ctrlKey || e.metaKey) && (lowerKey == 'c' || lowerKey == 'v')) {
      // On FF the key press (not key down) event gets fired for copy/paste.
      // Let it fall through for the default browser behaviour.
      return;
    }
  
    if (e.altKey && this.altSendsWhat == 'browser-key' && e.charCode == 0) {
      // If we got here because we were expecting the browser to handle an
      // alt sequence but it didn't do it, then we might be on an OS without
      // an enabled IME system.  In that case we fall back to xterm-like
      // behavior.
      //
      // This happens here only as a fallback.  Typically these platforms should
      // set altSendsWhat to either 'escape' or '8-bit'.
      var ch = String.fromCharCode(e.keyCode);
      if (!e.shiftKey)
        ch = ch.toLowerCase();
      code = ch.charCodeAt(0) + 128;
  
    } else if (e.charCode >= 32) {
      ch = e.charCode;
    }
  
    if (ch)
      this.terminal.onVTKeystroke(String.fromCharCode(ch));
  
    e.preventDefault();
    e.stopPropagation();
  };
  
  /**
   * Prevent default handling for non-ctrl-shifted event.
   *
   * When combined with Chrome permission 'app.window.fullscreen.overrideEsc',
   * and called for both key down and key up events,
   * the ESC key remains usable within fullscreen Chrome app windows.
   */
  hterm.Keyboard.prototype.preventChromeAppNonCtrlShiftDefault_ = function(e) {
    if (!window.chrome || !window.chrome.app || !window.chrome.app.window)
      return;
    if (!e.ctrlKey || !e.shiftKey)
      e.preventDefault();
  };
  
  hterm.Keyboard.prototype.onBlur_ = function(e) {
    this.altKeyPressed = 0;
  };
  
  hterm.Keyboard.prototype.onKeyUp_ = function(e) {
    if (e.keyCode == 18)
      this.altKeyPressed = this.altKeyPressed & ~(1 << (e.location - 1));
  
    if (e.keyCode == 27)
      this.preventChromeAppNonCtrlShiftDefault_(e);
  };
  
  /**
   * Handle onKeyDown events.
   */
  hterm.Keyboard.prototype.onKeyDown_ = function(e) {
    if (e.keyCode == 18)
      this.altKeyPressed = this.altKeyPressed | (1 << (e.location - 1));
  
    if (e.keyCode == 27)
      this.preventChromeAppNonCtrlShiftDefault_(e);
  
    var keyDef = this.keyMap.keyDefs[e.keyCode];
    if (!keyDef) {
      console.warn('No definition for keyCode: ' + e.keyCode);
      return;
    }
  
    // The type of action we're going to use.
    var resolvedActionType = null;
  
    var self = this;
    function getAction(name) {
      // Get the key action for the given action name.  If the action is a
      // function, dispatch it.  If the action defers to the normal action,
      // resolve that instead.
  
      resolvedActionType = name;
  
      var action = keyDef[name];
      if (typeof action == 'function')
        action = action.apply(self.keyMap, [e, keyDef]);
  
      if (action === DEFAULT && name != 'normal')
        action = getAction('normal');
  
      return action;
    }
  
    // Note that we use the triple-equals ('===') operator to test equality for
    // these constants, in order to distingush usage of the constant from usage
    // of a literal string that happens to contain the same bytes.
    var CANCEL = hterm.Keyboard.KeyActions.CANCEL;
    var DEFAULT = hterm.Keyboard.KeyActions.DEFAULT;
    var PASS = hterm.Keyboard.KeyActions.PASS;
    var STRIP = hterm.Keyboard.KeyActions.STRIP;
  
    var control = e.ctrlKey;
    var alt = this.altIsMeta ? false : e.altKey;
    var meta = this.altIsMeta ? (e.altKey || e.metaKey) : e.metaKey;
  
    // In the key-map, we surround the keyCap for non-printables in "[...]"
    var isPrintable = !(/^\[\w+\]$/.test(keyDef.keyCap));
  
    switch (this.altGrMode) {
      case 'ctrl-alt':
      if (isPrintable && control && alt) {
        // ctrl-alt-printable means altGr.  We clear out the control and
        // alt modifiers and wait to see the charCode in the keydown event.
        control = false;
        alt = false;
      }
      break;
  
      case 'right-alt':
      if (isPrintable && (this.terminal.keyboard.altKeyPressed & 2)) {
        control = false;
        alt = false;
      }
      break;
  
      case 'left-alt':
      if (isPrintable && (this.terminal.keyboard.altKeyPressed & 1)) {
        control = false;
        alt = false;
      }
      break;
    }
  
    var action;
  
    if (control) {
      action = getAction('control');
    } else if (alt) {
      action = getAction('alt');
    } else if (meta) {
      action = getAction('meta');
    } else {
      action = getAction('normal');
    }
  
    // If e.maskShiftKey was set (during getAction) it means the shift key is
    // already accounted for in the action, and we should not act on it any
    // further. This is currently only used for Ctrl-Shift-Tab, which should send
    // "CSI Z", not "CSI 1 ; 2 Z".
    var shift = !e.maskShiftKey && e.shiftKey;
  
    var keyDown = {
      keyCode: e.keyCode,
      shift: e.shiftKey, // not `var shift` from above.
      ctrl: control,
      alt: alt,
      meta: meta
    };
  
    var binding = this.bindings.getBinding(keyDown);
  
    if (binding) {
      // Clear out the modifier bits so we don't try to munge the sequence
      // further.
      shift = control = alt = meta = false;
      resolvedActionType = 'normal';
      action = binding.action;
  
      if (typeof action == 'function')
        action = action.call(this, this.terminal, keyDown);
    }
  
    if (alt && this.altSendsWhat == 'browser-key' && action == DEFAULT) {
      // When altSendsWhat is 'browser-key', we wait for the keypress event.
      // In keypress, the browser should have set the event.charCode to the
      // appropriate character.
      // TODO(rginda): Character compositions will need some black magic.
      action = PASS;
    }
  
    if (action === PASS || (action === DEFAULT && !(control || alt || meta))) {
      // If this key is supposed to be handled by the browser, or it is an
      // unmodified key with the default action, then exit this event handler.
      // If it's an unmodified key, it'll be handled in onKeyPress where we
      // can tell for sure which ASCII code to insert.
      //
      // This block needs to come before the STRIP test, otherwise we'll strip
      // the modifier and think it's ok to let the browser handle the keypress.
      // The browser won't know we're trying to ignore the modifiers and might
      // perform some default action.
      return;
    }
  
    if (action === STRIP) {
      alt = control = false;
      action = keyDef.normal;
      if (typeof action == 'function')
        action = action.apply(this.keyMap, [e, keyDef]);
  
      if (action == DEFAULT && keyDef.keyCap.length == 2)
        action = keyDef.keyCap.substr((shift ? 1 : 0), 1);
    }
  
    e.preventDefault();
    e.stopPropagation();
  
    if (action === CANCEL)
      return;
  
    if (action !== DEFAULT && typeof action != 'string') {
      console.warn('Invalid action: ' + JSON.stringify(action));
      return;
    }
  
    // Strip the modifier that is associated with the action, since we assume that
    // modifier has already been accounted for in the action.
    if (resolvedActionType == 'control') {
      control = false;
    } else if (resolvedActionType == 'alt') {
      alt = false;
    } else if (resolvedActionType == 'meta') {
      meta = false;
    }
  
    if (action.substr(0, 2) == '\x1b[' && (alt || control || shift)) {
      // The action is an escape sequence that and it was triggered in the
      // presence of a keyboard modifier, we may need to alter the action to
      // include the modifier before sending it.
  
      var mod;
  
      if (shift && !(alt || control)) {
        mod = ';2';
      } else if (alt && !(shift || control)) {
        mod = ';3';
      } else if (shift && alt && !control) {
        mod = ';4';
      } else if (control && !(shift || alt)) {
        mod = ';5';
      } else if (shift && control && !alt) {
        mod = ';6';
      } else if (alt && control && !shift) {
        mod = ';7';
      } else if (shift && alt && control) {
        mod = ';8';
      }
  
      if (action.length == 3) {
        // Some of the CSI sequences have zero parameters unless modified.
        action = '\x1b[1' + mod + action.substr(2, 1);
      } else {
        // Others always have at least one parameter.
        action = action.substr(0, action.length - 1) + mod +
            action.substr(action.length - 1);
      }
  
    } else {
      if (action === DEFAULT) {
        action = keyDef.keyCap.substr((shift ? 1 : 0), 1);
  
        if (control) {
          var unshifted = keyDef.keyCap.substr(0, 1);
          var code = unshifted.charCodeAt(0);
          if (code >= 64 && code <= 95) {
            action = String.fromCharCode(code - 64);
          }
        }
      }
  
      if (alt && this.altSendsWhat == '8-bit' && action.length == 1) {
        var code = action.charCodeAt(0) + 128;
        action = String.fromCharCode(code);
      }
  
      // We respect alt/metaSendsEscape even if the keymap action was a literal
      // string.  Otherwise, every overridden alt/meta action would have to
      // check alt/metaSendsEscape.
      if ((alt && this.altSendsWhat == 'escape') ||
          (meta && this.metaSendsEscape)) {
        action = '\x1b' + action;
      }
    }
  
    this.terminal.onVTKeystroke(action);
  };
  // SOURCE FILE: hterm/js/hterm_keyboard_bindings.js
  // Copyright (c) 2015 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  /**
   * A mapping from hterm.Keyboard.KeyPattern to an action.
   *
   * TODO(rginda): For now this bindings code is only used for user overrides.
   * hterm.Keyboard.KeyMap still handles all of the built-in key mappings.
   * It'd be nice if we migrated that over to be hterm.Keyboard.Bindings based.
   */
  hterm.Keyboard.Bindings = function() {
    this.bindings_ = {};
  };
  
  /**
   * Remove all bindings.
   */
  hterm.Keyboard.Bindings.prototype.clear = function () {
    this.bindings_ = {};
  };
  
  /**
   * Add a new binding.
   *
   * If a binding for the keyPattern already exists it will be overridden.
   *
   * More specific keyPatterns take precedence over those with wildcards.  Given
   * bindings for "Ctrl-A" and "Ctrl-*-A", and a "Ctrl-A" keydown, the "Ctrl-A"
   * binding will match even if "Ctrl-*-A" was created last.
   *
   * @param {hterm.Keyboard.KeyPattern} keyPattern
   * @param {string|function|hterm.Keyboard.KeyAction} action
   */
  hterm.Keyboard.Bindings.prototype.addBinding = function(keyPattern, action) {
    var binding = null;
    var list = this.bindings_[keyPattern.keyCode];
    if (list) {
      for (var i = 0; i < list.length; i++) {
        if (list[i].keyPattern.matchKeyPattern(keyPattern)) {
          binding = list[i];
          break;
        }
      }
    }
  
    if (binding) {
      binding.action = action;
    } else {
      binding = {keyPattern: keyPattern, action: action};
  
      if (!list) {
        this.bindings_[keyPattern.keyCode] = [binding];
      } else {
        this.bindings_[keyPattern.keyCode].push(binding);
  
        list.sort(function(a, b) {
          return hterm.Keyboard.KeyPattern.sortCompare(
              a.keyPattern, b.keyPattern);
        });
      }
    }
  };
  
  /**
   * Add multiple bindings at a time using a map of {string: string, ...}
   *
   * This uses hterm.Parser to parse the maps key into KeyPatterns, and the
   * map values into {string|function|KeyAction}.
   *
   * @param {Object} map
   */
  hterm.Keyboard.Bindings.prototype.addBindings = function(map) {
    var p = new hterm.Parser();
  
    for (var key in map) {
      p.reset(key);
      var sequence;
  
      try {
        sequence = p.parseKeySequence();
      } catch (ex) {
        console.error(ex);
        continue;
      }
  
      if (!p.isComplete()) {
        console.error(p.error('Expected end of sequence: ' + sequence));
        continue;
      }
  
      p.reset(map[key]);
      var action;
  
      try {
        action = p.parseKeyAction();
      } catch (ex) {
        console.error(ex);
        continue;
      }
  
      if (!p.isComplete()) {
        console.error(p.error('Expected end of sequence: ' + sequence));
        continue;
      }
  
      this.addBinding(new hterm.Keyboard.KeyPattern(sequence), action);
    }
  };
  
  /**
   * Return the binding that is the best match for the given keyDown record,
   * or null if there is no match.
   *
   * @param {Object} keyDown An object with a keyCode property and zero or
   *   more boolean properties representing key modifiers.  These property names
   *   must match those defined in hterm.Keyboard.KeyPattern.modifiers.
   */
  hterm.Keyboard.Bindings.prototype.getBinding = function(keyDown) {
    var list = this.bindings_[keyDown.keyCode];
    if (!list)
      return null;
  
    for (var i = 0; i < list.length; i++) {
      var binding = list[i];
      if (binding.keyPattern.matchKeyDown(keyDown))
        return binding;
    }
  
    return null;
  };
  // SOURCE FILE: hterm/js/hterm_keyboard_keymap.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  lib.rtdep('hterm.Keyboard.KeyActions');
  
  /**
   * The default key map for hterm.
   *
   * Contains a mapping of keyCodes to keyDefs (aka key definitions).  The key
   * definition tells the hterm.Keyboard class how to handle keycodes.
   *
   * This should work for most cases, as the printable characters get handled
   * in the keypress event.  In that case, even if the keycap is wrong in the
   * key map, the correct character should be sent.
   *
   * Different layouts, such as Dvorak should work with this keymap, as those
   * layouts typically move keycodes around on the keyboard without disturbing
   * the actual keycaps.
   *
   * There may be issues with control keys on non-US keyboards or with keyboards
   * that very significantly from the expectations here, in which case we may
   * have to invent new key maps.
   *
   * The sequences defined in this key map come from [XTERM] as referenced in
   * vt.js, starting with the section titled "Alt and Meta Keys".
   */
  hterm.Keyboard.KeyMap = function(keyboard) {
    this.keyboard = keyboard;
    this.keyDefs = {};
    this.reset();
  };
  
  /**
   * Add a single key definition.
   *
   * The definition is a hash containing the following keys: 'keyCap', 'normal',
   * 'control', and 'alt'.
   *
   *  - keyCap is a string identifying the key.  For printable
   *    keys, the key cap should be exactly two characters, starting with the
   *    unshifted version.  For example, 'aA', 'bB', '1!' and '=+'.  For
   *    non-printable the key cap should be surrounded in square braces, as in
   *    '[INS]', '[LEFT]'.  By convention, non-printable keycaps are in uppercase
   *    but this is not a strict requirement.
   *
   *  - Normal is the action that should be performed when they key is pressed
   *    in the absence of any modifier.  See below for the supported actions.
   *
   *  - Control is the action that should be performed when they key is pressed
   *    along with the control modifier.  See below for the supported actions.
   *
   *  - Alt is the action that should be performed when they key is pressed
   *    along with the alt modifier.  See below for the supported actions.
   *
   *  - Meta is the action that should be performed when they key is pressed
   *    along with the meta modifier.  See below for the supported actions.
   *
   * Actions can be one of the hterm.Keyboard.KeyActions as documented below,
   * a literal string, or an array.  If the action is a literal string then
   * the string is sent directly to the host.  If the action is an array it
   * is taken to be an escape sequence that may be altered by modifier keys.
   * The second-to-last element of the array will be overwritten with the
   * state of the modifier keys, as specified in the final table of "PC-Style
   * Function Keys" from [XTERM].
   */
  hterm.Keyboard.KeyMap.prototype.addKeyDef = function(keyCode, def) {
    if (keyCode in this.keyDefs)
      console.warn('Duplicate keyCode: ' + keyCode);
  
    this.keyDefs[keyCode] = def;
  };
  
  /**
   * Add mutiple key definitions in a single call.
   *
   * This function takes the key definitions as variable argument list.  Each
   * argument is the key definition specified as an array.
   *
   * (If the function took everything as one big hash we couldn't detect
   * duplicates, and there would be a lot more typing involved.)
   *
   * Each key definition should have 6 elements: (keyCode, keyCap, normal action,
   * control action, alt action and meta action).  See KeyMap.addKeyDef for the
   * meaning of these elements.
   */
  hterm.Keyboard.KeyMap.prototype.addKeyDefs = function(var_args) {
    for (var i = 0; i < arguments.length; i++) {
      this.addKeyDef(arguments[i][0],
                     { keyCap: arguments[i][1],
                       normal: arguments[i][2],
                       control: arguments[i][3],
                       alt: arguments[i][4],
                       meta: arguments[i][5]
                     });
    }
  };
  
  /**
   * Set up the default state for this keymap.
   */
  hterm.Keyboard.KeyMap.prototype.reset = function() {
    this.keyDefs = {};
  
    var self = this;
  
    // This function is used by the "macro" functions below.  It makes it
    // possible to use the call() macro as an argument to any other macro.
    function resolve(action, e, k) {
      if (typeof action == 'function')
        return action.apply(self, [e, k]);
  
      return action;
    }
  
    // If not application keypad a, else b.  The keys that care about
    // application keypad ignore it when the key is modified.
    function ak(a, b) {
      return function(e, k) {
        var action = (e.shiftKey || e.ctrlKey || e.altKey || e.metaKey ||
                      !self.keyboard.applicationKeypad) ? a : b;
        return resolve(action, e, k);
      };
    }
  
    // If mod or not application cursor a, else b.  The keys that care about
    // application cursor ignore it when the key is modified.
    function ac(a, b) {
      return function(e, k) {
        var action = (e.shiftKey || e.ctrlKey || e.altKey || e.metaKey ||
                      !self.keyboard.applicationCursor) ? a : b;
        return resolve(action, e, k);
      };
    }
  
    // If not backspace-sends-backspace keypad a, else b.
    function bs(a, b) {
      return function(e, k) {
        var action = !self.keyboard.backspaceSendsBackspace ? a : b;
        return resolve(action, e, k);
      };
    }
  
    // If not e.shiftKey a, else b.
    function sh(a, b) {
      return function(e, k) {
        var action = !e.shiftKey ? a : b;
        e.maskShiftKey = true;
        return resolve(action, e, k);
      };
    }
  
    // If not e.altKey a, else b.
    function alt(a, b) {
      return function(e, k) {
        var action = !e.altKey ? a : b;
        return resolve(action, e, k);
      };
    }
  
    // If no modifiers a, else b.
    function mod(a, b) {
      return function(e, k) {
        var action = !(e.shiftKey || e.ctrlKey || e.altKey || e.metaKey) ? a : b;
        return resolve(action, e, k);
      };
    }
  
    // Compute a control character for a given character.
    function ctl(ch) { return String.fromCharCode(ch.charCodeAt(0) - 64) }
  
    // Call a method on the keymap instance.
    function c(m) { return function (e, k) { return this[m](e, k) } }
  
    // Ignore if not trapping media keys.
    function med(fn) {
      return function(e, k) {
        if (!self.keyboard.mediaKeysAreFKeys) {
          // Block Back, Forward, and Reload keys to avoid navigating away from
          // the current page.
          return (e.keyCode == 166 || e.keyCode == 167 || e.keyCode == 168) ?
              hterm.Keyboard.KeyActions.CANCEL :
              hterm.Keyboard.KeyActions.PASS;
        }
        return resolve(fn, e, k);
      };
    }
  
    var ESC = '\x1b';
    var CSI = '\x1b[';
    var SS3 = '\x1bO';
  
    var CANCEL = hterm.Keyboard.KeyActions.CANCEL;
    var DEFAULT = hterm.Keyboard.KeyActions.DEFAULT;
    var PASS = hterm.Keyboard.KeyActions.PASS;
    var STRIP = hterm.Keyboard.KeyActions.STRIP;
  
    this.addKeyDefs(
      // These fields are: [keycode, keycap, normal, control, alt, meta]
  
      // The browser sends the keycode 0 for some keys.  We'll just assume it's
      // going to do the right thing by default for those keys.
      [0,   '[UNKNOWN]', PASS, PASS, PASS, PASS],
  
      // First row.
      [27,  '[ESC]', ESC,                       DEFAULT, DEFAULT,     DEFAULT],
      [112, '[F1]',  mod(SS3 + 'P', CSI + 'P'), DEFAULT, CSI + "23~", DEFAULT],
      [113, '[F2]',  mod(SS3 + 'Q', CSI + 'Q'), DEFAULT, CSI + "24~", DEFAULT],
      [114, '[F3]',  mod(SS3 + 'R', CSI + 'R'), DEFAULT, CSI + "25~", DEFAULT],
      [115, '[F4]',  mod(SS3 + 'S', CSI + 'S'), DEFAULT, CSI + "26~", DEFAULT],
      [116, '[F5]',  CSI + '15~',               DEFAULT, CSI + "28~", DEFAULT],
      [117, '[F6]',  CSI + '17~',               DEFAULT, CSI + "29~", DEFAULT],
      [118, '[F7]',  CSI + '18~',               DEFAULT, CSI + "31~", DEFAULT],
      [119, '[F8]',  CSI + '19~',               DEFAULT, CSI + "32~", DEFAULT],
      [120, '[F9]',  CSI + '20~',               DEFAULT, CSI + "33~", DEFAULT],
      [121, '[F10]', CSI + '21~',               DEFAULT, CSI + "34~", DEFAULT],
      [122, '[F11]', CSI + '23~',               DEFAULT, CSI + "42~", DEFAULT],
      [123, '[F12]', CSI + '24~',               DEFAULT, CSI + "43~", DEFAULT],
  
      // Second row.
      [192, '`~', DEFAULT, sh(ctl('@'), ctl('^')),     DEFAULT,           PASS],
      [49,  '1!', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
      [50,  '2@', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
      [51,  '3#', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
      [52,  '4$', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
      [53,  '5%', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
      [54,  '6^', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
      [55,  '7&', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
      [56,  '8*', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
      [57,  '9(', DEFAULT, c('onCtrlNum_'),    c('onAltNum_'), c('onMetaNum_')],
      [48,  '0)', DEFAULT, c('onPlusMinusZero_'),c('onAltNum_'),c('onPlusMinusZero_')],
      [189, '-_', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
      [187, '=+', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
      // Firefox -_ and =+
      [173, '-_', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
      [61, '=+', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
      // Firefox Italian +*
      [171, '+*', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
  
      [8,   '[BKSP]', bs('\x7f', '\b'), bs('\b', '\x7f'), DEFAULT,     DEFAULT],
  
      // Third row.
      [9,   '[TAB]', sh('\t', CSI + 'Z'), STRIP,     PASS,    DEFAULT],
      [81,  'qQ',    DEFAULT,             ctl('Q'),  DEFAULT, DEFAULT],
      [87,  'wW',    DEFAULT,             ctl('W'),  DEFAULT, DEFAULT],
      [69,  'eE',    DEFAULT,             ctl('E'),  DEFAULT, DEFAULT],
      [82,  'rR',    DEFAULT,             ctl('R'),  DEFAULT, DEFAULT],
      [84,  'tT',    DEFAULT,             ctl('T'),  DEFAULT, DEFAULT],
      [89,  'yY',    DEFAULT,             ctl('Y'),  DEFAULT, DEFAULT],
      [85,  'uU',    DEFAULT,             ctl('U'),  DEFAULT, DEFAULT],
      [73,  'iI',    DEFAULT,             ctl('I'),  DEFAULT, DEFAULT],
      [79,  'oO',    DEFAULT,             ctl('O'),  DEFAULT, DEFAULT],
      [80,  'pP',    DEFAULT,             ctl('P'),  DEFAULT, DEFAULT],
      [219, '[{',    DEFAULT,             ctl('['),  DEFAULT, DEFAULT],
      [221, ']}',    DEFAULT,             ctl(']'),  DEFAULT, DEFAULT],
      [220, '\\|',   DEFAULT,             ctl('\\'), DEFAULT, DEFAULT],
  
      // Fourth row. (We let Ctrl-Shift-J pass for Chrome DevTools.)
      [20,  '[CAPS]',  PASS,    PASS,                           PASS,    DEFAULT],
      [65,  'aA',      DEFAULT, ctl('A'),                       DEFAULT, DEFAULT],
      [83,  'sS',      DEFAULT, ctl('S'),                       DEFAULT, DEFAULT],
      [68,  'dD',      DEFAULT, ctl('D'),                       DEFAULT, DEFAULT],
      [70,  'fF',      DEFAULT, ctl('F'),                       DEFAULT, DEFAULT],
      [71,  'gG',      DEFAULT, ctl('G'),                       DEFAULT, DEFAULT],
      [72,  'hH',      DEFAULT, ctl('H'),                       DEFAULT, DEFAULT],
      [74,  'jJ',      DEFAULT, sh(ctl('J'), PASS),             DEFAULT, DEFAULT],
      [75,  'kK',      DEFAULT, sh(ctl('K'), c('onClear_')),    DEFAULT, DEFAULT],
      [76,  'lL',      DEFAULT, sh(ctl('L'), PASS),             DEFAULT, DEFAULT],
      [186, ';:',      DEFAULT, STRIP,                          DEFAULT, DEFAULT],
      [222, '\'"',     DEFAULT, STRIP,                          DEFAULT, DEFAULT],
      [13,  '[ENTER]', '\r',    CANCEL,                         CANCEL,  DEFAULT],
  
      // Fifth row.  This includes the copy/paste shortcuts.  On some
      // platforms it's Ctrl-C/V, on others it's Meta-C/V.  We assume either
      // Ctrl-C/Meta-C should pass to the browser when there is a selection,
      // and Ctrl-Shift-V/Meta-*-V should always pass to the browser (since
      // these seem to be recognized as paste too).
      [16,  '[SHIFT]', PASS, PASS,                   PASS,    DEFAULT],
      [90,  'zZ',   DEFAULT, ctl('Z'),               DEFAULT, DEFAULT],
      [88,  'xX',   DEFAULT, ctl('X'),               DEFAULT, DEFAULT],
      [67,  'cC',   DEFAULT, c('onCtrlC_'),          DEFAULT, c('onMetaC_')],
      [86,  'vV',   DEFAULT, c('onCtrlV_'),          DEFAULT, c('onMetaV_')],
      [66,  'bB',   DEFAULT, sh(ctl('B'), PASS),     DEFAULT, sh(DEFAULT, PASS)],
      [78,  'nN',   DEFAULT, c('onCtrlN_'),          DEFAULT, c('onMetaN_')],
      [77,  'mM',   DEFAULT, ctl('M'),               DEFAULT, DEFAULT],
      [188, ',<',   DEFAULT, alt(STRIP, PASS),       DEFAULT, DEFAULT],
      [190, '.>',   DEFAULT, alt(STRIP, PASS),       DEFAULT, DEFAULT],
      [191, '/?',   DEFAULT, sh(ctl('_'), ctl('?')), DEFAULT, DEFAULT],
  
      // Sixth and final row.
      [17,  '[CTRL]',  PASS,    PASS,     PASS,    PASS],
      [18,  '[ALT]',   PASS,    PASS,     PASS,    PASS],
      [91,  '[LAPL]',  PASS,    PASS,     PASS,    PASS],
      [32,  ' ',       DEFAULT, ctl('@'), DEFAULT, DEFAULT],
      [92,  '[RAPL]',  PASS,    PASS,     PASS,    PASS],
      [93,  '[RMENU]', PASS,    PASS,     PASS,    PASS],
  
      // These things.
      [42,  '[PRTSCR]', PASS, PASS, PASS, PASS],
      [145, '[SCRLK]',  PASS, PASS, PASS, PASS],
      [19,  '[BREAK]',  PASS, PASS, PASS, PASS],
  
      // The block of six keys above the arrows.
      [45,  '[INSERT]', c('onKeyInsert_'),   DEFAULT, DEFAULT, DEFAULT],
      [36,  '[HOME]',   c('onKeyHome_'),     DEFAULT, DEFAULT, DEFAULT],
      [33,  '[PGUP]',   c('onKeyPageUp_'),   DEFAULT, DEFAULT, DEFAULT],
      [46,  '[DEL]',    c('onKeyDel_'),      DEFAULT, DEFAULT, DEFAULT],
      [35,  '[END]',    c('onKeyEnd_'),      DEFAULT, DEFAULT, DEFAULT],
      [34,  '[PGDOWN]', c('onKeyPageDown_'), DEFAULT, DEFAULT, DEFAULT],
  
      // Arrow keys.  When unmodified they respect the application cursor state,
      // otherwise they always send the CSI codes.
      [38, '[UP]',    ac(CSI + 'A', SS3 + 'A'), DEFAULT, DEFAULT, DEFAULT],
      [40, '[DOWN]',  ac(CSI + 'B', SS3 + 'B'), DEFAULT, DEFAULT, DEFAULT],
      [39, '[RIGHT]', ac(CSI + 'C', SS3 + 'C'), DEFAULT, DEFAULT, DEFAULT],
      [37, '[LEFT]',  ac(CSI + 'D', SS3 + 'D'), DEFAULT, DEFAULT, DEFAULT],
  
      [144, '[NUMLOCK]', PASS, PASS, PASS, PASS],
  
      // With numlock off, the keypad generates the same key codes as the arrows
      // and 'block of six' for some keys, and null key codes for the rest.
  
      // Keypad with numlock on generates unique key codes...
      [96,  '[KP0]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
      [97,  '[KP1]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
      [98,  '[KP2]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
      [99,  '[KP3]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
      [100, '[KP4]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
      [101, '[KP5]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
      [102, '[KP6]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
      [103, '[KP7]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
      [104, '[KP8]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
      [105, '[KP9]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
      [107, '[KP+]', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
      [109, '[KP-]', DEFAULT, c('onPlusMinusZero_'), DEFAULT, c('onPlusMinusZero_')],
      [106, '[KP*]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
      [111, '[KP/]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
      [110, '[KP.]', DEFAULT, DEFAULT, DEFAULT, DEFAULT],
  
      // Chrome OS keyboard top row.
      [166, '[BACK]',   med(mod(SS3+'P', CSI+'P')), DEFAULT, CSI+"23~", DEFAULT],
      [167, '[FWD]',    med(mod(SS3+'Q', CSI+'Q')), DEFAULT, CSI+"24~", DEFAULT],
      [168, '[RELOAD]', med(mod(SS3+'R', CSI+'R')), DEFAULT, CSI+"25~", DEFAULT],
      [183, '[FSCR]',   med(mod(SS3+'S', CSI+'S')), DEFAULT, CSI+"26~", DEFAULT],
      [182, '[WINS]',   med(CSI + '15~'),           DEFAULT, CSI+"28~", DEFAULT],
      [216, '[BRIT-]',  med(CSI + '17~'),           DEFAULT, CSI+"29~", DEFAULT],
      [217, '[BRIT+]',  med(CSI + '18~'),           DEFAULT, CSI+"31~", DEFAULT]
  
      // 173 [MUTE], 174 [VOL-] and 175 [VOL+] are trapped by the Chrome OS
      // window manager, so we'll never see them. Note that 173 is also
      // Firefox's -_ keycode.
    );
  };
  
  /**
   * Either allow the paste or send a key sequence.
   */
  hterm.Keyboard.KeyMap.prototype.onKeyInsert_ = function(e) {
    if (this.keyboard.shiftInsertPaste && e.shiftKey)
      return hterm.Keyboard.KeyActions.PASS;
  
    return '\x1b[2~';
  };
  
  /**
   * Either scroll the scrollback buffer or send a key sequence.
   */
  hterm.Keyboard.KeyMap.prototype.onKeyHome_ = function(e) {
    if (!this.keyboard.homeKeysScroll ^ e.shiftKey) {
      if ((e.altey || e.ctrlKey || e.shiftKey) ||
          !this.keyboard.applicationCursor) {
        return '\x1b[H';
      }
  
      return '\x1bOH';
    }
  
    this.keyboard.terminal.scrollHome();
    return hterm.Keyboard.KeyActions.CANCEL;
  };
  
  /**
   * Either scroll the scrollback buffer or send a key sequence.
   */
  hterm.Keyboard.KeyMap.prototype.onKeyEnd_ = function(e) {
    if (!this.keyboard.homeKeysScroll ^ e.shiftKey) {
      if ((e.altKey || e.ctrlKey || e.shiftKey) ||
          !this.keyboard.applicationCursor) {
        return '\x1b[F';
      }
  
      return '\x1bOF';
    }
  
    this.keyboard.terminal.scrollEnd();
    return hterm.Keyboard.KeyActions.CANCEL;
  };
  
  /**
   * Either scroll the scrollback buffer or send a key sequence.
   */
  hterm.Keyboard.KeyMap.prototype.onKeyPageUp_ = function(e) {
    if (!this.keyboard.pageKeysScroll ^ e.shiftKey)
      return '\x1b[5~';
  
    this.keyboard.terminal.scrollPageUp();
    return hterm.Keyboard.KeyActions.CANCEL;
  };
  
  /**
   * Either send a true DEL, or sub in meta-backspace.
   *
   * On Chrome OS, if we know the alt key is down, but we get a DEL event that
   * claims that the alt key is not pressed, we know the DEL was a synthetic
   * one from a user that hit alt-backspace. Based on a user pref, we can sub
   * in meta-backspace in this case.
   */
  hterm.Keyboard.KeyMap.prototype.onKeyDel_ = function(e) {
    if (this.keyboard.altBackspaceIsMetaBackspace &&
        this.keyboard.altKeyPressed && !e.altKey)
      return '\x1b\x7f';
    return '\x1b[3~';
  };
  
  /**
   * Either scroll the scrollback buffer or send a key sequence.
   */
  hterm.Keyboard.KeyMap.prototype.onKeyPageDown_ = function(e) {
    if (!this.keyboard.pageKeysScroll ^ e.shiftKey)
      return '\x1b[6~';
  
    this.keyboard.terminal.scrollPageDown();
    return hterm.Keyboard.KeyActions.CANCEL;
  };
  
  /**
   * Clear the primary/alternate screens and the scrollback buffer.
   */
  hterm.Keyboard.KeyMap.prototype.onClear_ = function(e, keyDef) {
    this.keyboard.terminal.wipeContents();
    return hterm.Keyboard.KeyActions.CANCEL;
  };
  
  /**
   * Either pass Ctrl-1..9 to the browser or send them to the host.
   *
   * Note that Ctrl-1 and Ctrl-9 don't actually have special sequences mapped
   * to them in xterm or gnome-terminal.  The range is really Ctrl-2..8, but
   * we handle 1..9 since Chrome treats the whole range special.
   */
  hterm.Keyboard.KeyMap.prototype.onCtrlNum_ = function(e, keyDef) {
    // Compute a control character for a given character.
    function ctl(ch) { return String.fromCharCode(ch.charCodeAt(0) - 64) }
  
    if (this.keyboard.terminal.passCtrlNumber && !e.shiftKey)
      return hterm.Keyboard.KeyActions.PASS;
  
    switch (keyDef.keyCap.substr(0, 1)) {
      case '1': return '1';
      case '2': return ctl('@');
      case '3': return ctl('[');
      case '4': return ctl('\\');
      case '5': return ctl(']');
      case '6': return ctl('^');
      case '7': return ctl('_');
      case '8': return '\x7f';
      case '9': return '9';
    }
  };
  
  /**
   * Either pass Alt-1..9 to the browser or send them to the host.
   */
  hterm.Keyboard.KeyMap.prototype.onAltNum_ = function(e, keyDef) {
    if (this.keyboard.terminal.passAltNumber && !e.shiftKey)
      return hterm.Keyboard.KeyActions.PASS;
  
    return hterm.Keyboard.KeyActions.DEFAULT;
  };
  
  /**
   * Either pass Meta-1..9 to the browser or send them to the host.
   */
  hterm.Keyboard.KeyMap.prototype.onMetaNum_ = function(e, keyDef) {
    if (this.keyboard.terminal.passMetaNumber && !e.shiftKey)
      return hterm.Keyboard.KeyActions.PASS;
  
    return hterm.Keyboard.KeyActions.DEFAULT;
  };
  
  /**
   * Either send a ^C or interpret the keystroke as a copy command.
   */
  hterm.Keyboard.KeyMap.prototype.onCtrlC_ = function(e, keyDef) {
    var selection = this.keyboard.terminal.getDocument().getSelection();
  
    if (!selection.isCollapsed) {
      if (this.keyboard.ctrlCCopy && !e.shiftKey) {
        // Ctrl-C should copy if there is a selection, send ^C otherwise.
        // Perform the copy by letting the browser handle Ctrl-C.  On most
        // browsers, this is the *only* way to place text on the clipboard from
        // the 'drive-by' web.
        if (this.keyboard.terminal.clearSelectionAfterCopy) {
          setTimeout(selection.collapseToEnd.bind(selection), 50);
        }
        return hterm.Keyboard.KeyActions.PASS;
      }
  
      if (!this.keyboard.ctrlCCopy && e.shiftKey) {
        // Ctrl-Shift-C should copy if there is a selection, send ^C otherwise.
        // Perform the copy manually.  This only works in situations where
        // document.execCommand('copy') is allowed.
        if (this.keyboard.terminal.clearSelectionAfterCopy) {
          setTimeout(selection.collapseToEnd.bind(selection), 50);
        }
        this.keyboard.terminal.copySelectionToClipboard();
        return hterm.Keyboard.KeyActions.CANCEL;
      }
    }
  
    return '\x03';
  };
  
  /**
   * Either send a ^N or open a new window to the same location.
   */
  hterm.Keyboard.KeyMap.prototype.onCtrlN_ = function(e, keyDef) {
    if (e.shiftKey) {
      window.open(document.location.href, '',
                  'chrome=no,close=yes,resize=yes,scrollbars=yes,' +
                  'minimizable=yes,width=' + window.innerWidth +
                  ',height=' + window.innerHeight);
      return hterm.Keyboard.KeyActions.CANCEL;
    }
  
    return '\x0e';
  };
  
  /**
   * Either send a ^V or allow the browser to interpret the keystroke as a paste
   * command.
   *
   * The default behavior is to paste if the user presses Ctrl-Shift-V, and send
   * a ^V if the user presses Ctrl-V. This can be flipped with the
   * 'ctrl-v-paste' preference.
   */
  hterm.Keyboard.KeyMap.prototype.onCtrlV_ = function(e, keyDef) {
    if ((!e.shiftKey && this.keyboard.ctrlVPaste) ||
        (e.shiftKey && !this.keyboard.ctrlVPaste)) {
      return hterm.Keyboard.KeyActions.PASS;
    }
  
    return '\x16';
  };
  
  /**
   * Either the default action or open a new window to the same location.
   */
  hterm.Keyboard.KeyMap.prototype.onMetaN_ = function(e, keyDef) {
    if (e.shiftKey) {
      window.open(document.location.href, '',
                  'chrome=no,close=yes,resize=yes,scrollbars=yes,' +
                  'minimizable=yes,width=' + window.outerWidth +
                  ',height=' + window.outerHeight);
      return hterm.Keyboard.KeyActions.CANCEL;
    }
  
    return hterm.Keyboard.KeyActions.DEFAULT;
  };
  
  /**
   * Either send a Meta-C or allow the browser to interpret the keystroke as a
   * copy command.
   *
   * If there is no selection, or if the user presses Meta-Shift-C, then we'll
   * transmit an '\x1b' (if metaSendsEscape is on) followed by 'c' or 'C'.
   *
   * If there is a selection, we defer to the browser.  In this case we clear out
   * the selection so the user knows we heard them, and also to give them a
   * chance to send a Meta-C by just hitting the key again.
   */
  hterm.Keyboard.KeyMap.prototype.onMetaC_ = function(e, keyDef) {
    var document = this.keyboard.terminal.getDocument();
    if (e.shiftKey || document.getSelection().isCollapsed) {
      // If the shift key is being held, or there is no document selection, send
      // a Meta-C.  The keyboard code will add the ESC if metaSendsEscape is true,
      // we just have to decide between 'c' and 'C'.
      return keyDef.keyCap.substr(e.shiftKey ? 1 : 0, 1);
    }
  
    // Otherwise let the browser handle it as a copy command.
    if (this.keyboard.terminal.clearSelectionAfterCopy) {
      setTimeout(function() { document.getSelection().collapseToEnd() }, 50);
    }
    return hterm.Keyboard.KeyActions.PASS;
  };
  
  /**
   * Either PASS or DEFAULT Meta-V, depending on preference.
   *
   * Always PASS Meta-Shift-V to allow browser to interpret the keystroke as
   * a paste command.
   */
  hterm.Keyboard.KeyMap.prototype.onMetaV_ = function(e, keyDef) {
    if (e.shiftKey)
      return hterm.Keyboard.KeyActions.PASS;
  
    return this.keyboard.passMetaV ?
        hterm.Keyboard.KeyActions.PASS :
        hterm.Keyboard.KeyActions.DEFAULT;
  };
  
  /**
   * Handle font zooming.
   *
   * The browser's built-in zoom has a bit of an issue at certain zoom levels.
   * At some magnifications, the measured height of a row of text differs from
   * the height that was explicitly set.
   *
   * We override the browser zoom keys to change the ScrollPort's font size to
   * avoid the issue.
   */
  hterm.Keyboard.KeyMap.prototype.onPlusMinusZero_ = function(e, keyDef) {
    if (!(this.keyboard.ctrlPlusMinusZeroZoom ^ e.shiftKey)) {
      // If ctrl-PMZ controls zoom and the shift key is pressed, or
      // ctrl-shift-PMZ controls zoom and this shift key is not pressed,
      // then we want to send the control code instead of affecting zoom.
      if (keyDef.keyCap == '-_')
        return '\x1f';  // ^_
  
      // Only ^_ is valid, the other sequences have no meaning.
      return hterm.Keyboard.KeyActions.CANCEL;
    }
  
    if (this.keyboard.terminal.getZoomFactor() != 1) {
      // If we're not at 1:1 zoom factor, let the Ctrl +/-/0 keys control the
      // browser zoom, so it's easier to for the user to get back to 100%.
      return hterm.Keyboard.KeyActions.PASS;
    }
  
    var cap = keyDef.keyCap.substr(0, 1);
    if (cap == '0') {
        this.keyboard.terminal.setFontSize(0);
    } else {
      var size = this.keyboard.terminal.getFontSize();
  
      if (cap == '-' || keyDef.keyCap == '[KP-]') {
        size -= 1;
      } else {
        size += 1;
      }
  
      this.keyboard.terminal.setFontSize(size);
    }
  
    return hterm.Keyboard.KeyActions.CANCEL;
  };
  // SOURCE FILE: hterm/js/hterm_keyboard_keypattern.js
  // Copyright (c) 2015 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  /**
   * A record of modifier bits and keycode used to define a key binding.
   *
   * The modifier names are enumerated in the static KeyPattern.modifiers
   * property below.  Each modifier can be true, false, or "*".  True means
   * the modifier key must be present, false means it must not, and "*" means
   * it doesn't matter.
   */
  hterm.Keyboard.KeyPattern = function(spec) {
    this.wildcardCount = 0;
    this.keyCode = spec.keyCode;
  
    hterm.Keyboard.KeyPattern.modifiers.forEach(function(mod) {
      this[mod] = spec[mod] || false;
      if (this[mod] == '*')
        this.wildcardCount++;
    }.bind(this));
  };
  
  /**
   * Valid modifier names.
   */
  hterm.Keyboard.KeyPattern.modifiers = [
    'shift', 'ctrl', 'alt', 'meta'
  ];
  
  /**
   * A compare callback for Array.prototype.sort().
   *
   * The bindings code wants to be sure to search through the strictest key
   * patterns first, so that loosely defined patterns have a lower priority than
   * exact patterns.
   *
   * @param {hterm.Keyboard.KeyPattern} a
   * @param {hterm.Keyboard.KeyPattern} b
   */
  hterm.Keyboard.KeyPattern.sortCompare = function(a, b) {
    if (a.wildcardCount < b.wildcardCount)
      return -1;
  
    if (a.wildcardCount > b.wildcardCount)
      return 1;
  
    return 0;
  };
  
  /**
   * Private method used to match this key pattern against other key patterns
   * or key down events.
   *
   * @param {Object} The object to match.
   * @param {boolean} True if we should ignore wildcards.  Useful when you want
   *   to perform and exact match against another key pattern.
   */
  hterm.Keyboard.KeyPattern.prototype.match_ = function(obj, exactMatch) {
    if (this.keyCode != obj.keyCode)
      return false;
  
    var rv = true;
  
    hterm.Keyboard.KeyPattern.modifiers.forEach(function(mod) {
      var modValue = (mod in obj) ? obj[mod] : false;
      if (!rv || (!exactMatch && this[mod] == '*') || this[mod] == modValue)
        return;
  
      rv = false;
    }.bind(this));
  
    return rv;
  };
  
  /**
   * Return true if the given keyDown object is a match for this key pattern.
   *
   * @param {Object} keyDown An object with a keyCode property and zero or
   *   more boolean properties representing key modifiers.  These property names
   *   must match those defined in hterm.Keyboard.KeyPattern.modifiers.
   */
  hterm.Keyboard.KeyPattern.prototype.matchKeyDown = function(keyDown) {
    return this.match_(keyDown, false);
  };
  
  /**
   * Return true if the given hterm.Keyboard.KeyPattern is exactly the same as
   * this one.
   *
   * @param {hterm.Keyboard.KeyPattern}
   */
  hterm.Keyboard.KeyPattern.prototype.matchKeyPattern = function(keyPattern) {
    return this.match_(keyPattern, true);
  };
  // SOURCE FILE: hterm/js/hterm_options.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  /**
   * @fileoverview This file implements the hterm.Options class,
   * which stores current operating conditions for the terminal.  This object is
   * used instead of a series of parameters to allow saving/restoring of cursor
   * conditions easily, and to provide an easy place for common configuration
   * options.
   *
   * Original code by Cory Maccarrone.
   */
  
  /**
   * Constructor for the hterm.Options class, optionally acting as a copy
   * constructor.
   *
   * The defaults are as defined in http://www.vt100.net/docs/vt510-rm/DECSTR
   * except that we enable autowrap (wraparound) by defaut since that seems to
   * be what xterm does.
   *
   * @param {hterm.Options=} opt_copy Optional instance to copy.
   * @constructor
   */
  hterm.Options = function(opt_copy) {
    // All attributes in this class are public to allow easy access by the
    // terminal.
  
    this.wraparound = opt_copy ? opt_copy.wraparound : true;
    this.reverseWraparound = opt_copy ? opt_copy.reverseWraparound : false;
    this.originMode = opt_copy ? opt_copy.originMode : false;
    this.autoCarriageReturn = opt_copy ? opt_copy.autoCarriageReturn : false;
    this.cursorVisible = opt_copy ? opt_copy.cursorVisible : false;
    this.cursorBlink = opt_copy ? opt_copy.cursorBlink : false;
    this.insertMode = opt_copy ? opt_copy.insertMode : false;
    this.reverseVideo = opt_copy ? opt_copy.reverseVideo : false;
    this.bracketedPaste = opt_copy ? opt_copy.bracketedPaste : false;
  };
  // SOURCE FILE: hterm/js/hterm_parser.js
  // Copyright (c) 2015 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  lib.rtdep('hterm.Keyboard.KeyActions');
  
  /**
   * @constructor
   * Parses the key definition syntax used for user keyboard customizations.
   */
  hterm.Parser = function() {
    /**
     * @type {string} The source string.
     */
    this.source = '';
  
    /**
     * @type {number} The current position.
     */
    this.pos = 0;
  
    /**
     * @type {string?} The character at the current position.
     */
    this.ch = null;
  };
  
  hterm.Parser.prototype.error = function(message) {
    return new Error('Parse error at ' + this.pos + ': ' + message);
  };
  
  hterm.Parser.prototype.isComplete = function() {
    return this.pos == this.source.length;
  };
  
  hterm.Parser.prototype.reset = function(source, opt_pos) {
    this.source = source;
    this.pos = opt_pos || 0;
    this.ch = source.substr(0, 1);
  };
  
  /**
   * Parse a key sequence.
   *
   * A key sequence is zero or more of the key modifiers defined in
   * hterm.Parser.identifiers.modifierKeys followed by a key code.  Key
   * codes can be an integer or an identifier from
   * hterm.Parser.identifiers.keyCodes.  Modifiers and keyCodes should be joined
   * by the dash character.
   *
   * An asterisk "*" can be used to indicate that the unspecified modifiers
   * are optional.
   *
   * For example:
   *   A: Matches only an unmodified "A" character.
   *   65: Same as above.
   *   0x41: Same as above.
   *   Ctrl-A: Matches only Ctrl-A.
   *   Ctrl-65: Same as above.
   *   Ctrl-0x41: Same as above.
   *   Ctrl-Shift-A: Matches only Ctrl-Shift-A.
   *   Ctrl-*-A: Matches Ctrl-A, as well as any other key sequence that includes
   *     at least the Ctrl and A keys.
   *
   * @return {Object} An object with shift, ctrl, alt, meta, keyCode
   *   properties.
   */
  hterm.Parser.prototype.parseKeySequence = function() {
    var rv = {
      keyCode: null
    };
  
    for (var k in hterm.Parser.identifiers.modifierKeys) {
      rv[hterm.Parser.identifiers.modifierKeys[k]] = false;
    }
  
    while (this.pos < this.source.length) {
      this.skipSpace();
  
      var token = this.parseToken();
      if (token.type == 'integer') {
        rv.keyCode = token.value;
  
      } else if (token.type == 'identifier') {
        if (token.value in hterm.Parser.identifiers.modifierKeys) {
          var mod = hterm.Parser.identifiers.modifierKeys[token.value];
          if (rv[mod] && rv[mod] != '*')
            throw this.error('Duplicate modifier: ' + token.value);
          rv[mod] = true;
  
        } else if (token.value in hterm.Parser.identifiers.keyCodes) {
          rv.keyCode = hterm.Parser.identifiers.keyCodes[token.value];
  
        } else {
          throw this.error('Unknown key: ' + token.value);
        }
  
      } else if (token.type == 'symbol') {
        if (token.value == '*') {
          for (var id in hterm.Parser.identifiers.modifierKeys) {
            var p = hterm.Parser.identifiers.modifierKeys[id];
            if (!rv[p])
              rv[p] =  '*';
          }
        } else {
          throw this.error('Unexpected symbol: ' + token.value);
        }
      } else {
        throw this.error('Expected integer or identifier');
      }
  
      this.skipSpace();
  
      if (this.ch != '-')
        break;
  
      if (rv.keyCode != null)
        throw this.error('Extra definition after target key');
  
      this.advance(1);
    }
  
    if (rv.keyCode == null)
      throw this.error('Missing target key');
  
    return rv;
  };
  
  hterm.Parser.prototype.parseKeyAction = function() {
    this.skipSpace();
  
    var token = this.parseToken();
  
    if (token.type == 'string')
      return token.value;
  
    if (token.type == 'identifier') {
      if (token.value in hterm.Parser.identifiers.actions)
        return hterm.Parser.identifiers.actions[token.value];
  
      throw this.error('Unknown key action: ' + token.value);
    }
  
    throw this.error('Expected string or identifier');
  
  };
  
  hterm.Parser.prototype.peekString = function() {
    return this.ch == '\'' || this.ch == '"';
  };
  
  hterm.Parser.prototype.peekIdentifier = function() {
    return this.ch.match(/[a-z_]/i);
  };
  
  hterm.Parser.prototype.peekInteger = function() {
    return this.ch.match(/[0-9]/);
  };
  
  hterm.Parser.prototype.parseToken = function() {
    if (this.ch == '*') {
      var rv = {type: 'symbol', value: this.ch};
      this.advance(1);
      return rv;
    }
  
    if (this.peekIdentifier())
      return {type: 'identifier', value: this.parseIdentifier()};
  
    if (this.peekString())
      return {type: 'string', value: this.parseString()};
  
    if (this.peekInteger())
      return {type: 'integer', value: this.parseInteger()};
  
  
    throw this.error('Unexpected token');
  };
  
  hterm.Parser.prototype.parseIdentifier = function() {
    if (!this.peekIdentifier())
      throw this.error('Expected identifier');
  
    return this.parsePattern(/[a-z0-9_]+/ig);
  };
  
  hterm.Parser.prototype.parseInteger = function() {
    var base = 10;
  
    if (this.ch == '0' && this.pos < this.source.length - 1 &&
        this.source.substr(this.pos + 1, 1) == 'x') {
      return parseInt(this.parsePattern(/0x[0-9a-f]+/gi));
    }
  
    return parseInt(this.parsePattern(/\d+/g));
  };
  
  /**
   * Parse a single or double quoted string.
   *
   * The current position should point at the initial quote character.  Single
   * quoted strings will be treated literally, double quoted will process escapes.
   *
   * TODO(rginda): Variable interpolation.
   *
   * @param {ParseState} parseState
   * @param {string} quote A single or double-quote character.
   * @return {string}
   */
  hterm.Parser.prototype.parseString = function() {
    var result = '';
  
    var quote = this.ch;
    if (quote != '"' && quote != '\'')
      throw this.error('String expected');
  
    this.advance(1);
  
    var re = new RegExp('[\\\\' + quote + ']', 'g');
  
    while (this.pos < this.source.length) {
      re.lastIndex = this.pos;
      if (!re.exec(this.source))
        throw this.error('Unterminated string literal');
  
      result += this.source.substring(this.pos, re.lastIndex - 1);
  
      this.advance(re.lastIndex - this.pos - 1);
  
      if (quote == '"' && this.ch == '\\') {
        this.advance(1);
        result += this.parseEscape();
        continue;
      }
  
      if (quote == '\'' && this.ch == '\\') {
        result += this.ch;
        this.advance(1);
        continue;
      }
  
      if (this.ch == quote) {
        this.advance(1);
        return result;
      }
    }
  
    throw this.error('Unterminated string literal');
  };
  
  
  /**
   * Parse an escape code from the current position (which should point to
   * the first character AFTER the leading backslash.)
   *
   * @return {string}
   */
  hterm.Parser.prototype.parseEscape = function() {
    var map = {
      '"': '"',
      '\'': '\'',
      '\\': '\\',
      'a': '\x07',
      'b': '\x08',
      'e': '\x1b',
      'f': '\x0c',
      'n': '\x0a',
      'r': '\x0d',
      't': '\x09',
      'v': '\x0b',
      'x': function() {
        var value = this.parsePattern(/[a-z0-9]{2}/ig);
        return String.fromCharCode(parseInt(value, 16));
      },
      'u': function() {
        var value = this.parsePattern(/[a-z0-9]{4}/ig);
        return String.fromCharCode(parseInt(value, 16));
      }
    };
  
    if (!(this.ch in map))
      throw this.error('Unknown escape: ' + this.ch);
  
    var value = map[this.ch];
    this.advance(1);
  
    if (typeof value == 'function')
      value = value.call(this);
  
    return value;
  };
  
  /**
   * Parse the given pattern starting from the current position.
   *
   * @param {RegExp} pattern A pattern representing the characters to span.  MUST
   *   include the "global" RegExp flag.
   * @return {string}
   */
  hterm.Parser.prototype.parsePattern = function(pattern) {
    if (!pattern.global)
      throw this.error('Internal error: Span patterns must be global');
  
    pattern.lastIndex = this.pos;
    var ary = pattern.exec(this.source);
  
    if (!ary || pattern.lastIndex - ary[0].length != this.pos)
      throw this.error('Expected match for: ' + pattern);
  
    this.pos = pattern.lastIndex - 1;
    this.advance(1);
  
    return ary[0];
  };
  
  
  /**
   * Advance the current position.
   *
   * @param {number} count
   */
  hterm.Parser.prototype.advance = function(count) {
    this.pos += count;
    this.ch = this.source.substr(this.pos, 1);
  };
  
  /**
   * @param {string=} opt_expect A list of valid non-whitespace characters to
   *   terminate on.
   * @return {void}
   */
  hterm.Parser.prototype.skipSpace = function(opt_expect) {
    if (!/\s/.test(this.ch))
      return;
  
    var re = /\s+/gm;
    re.lastIndex = this.pos;
  
    var source = this.source;
    if (re.exec(source))
      this.pos = re.lastIndex;
  
    this.ch = this.source.substr(this.pos, 1);
  
    if (opt_expect) {
      if (this.ch.indexOf(opt_expect) == -1) {
        throw this.error('Expected one of ' + opt_expect + ', found: ' +
            this.ch);
      }
    }
  };
  // SOURCE FILE: hterm/js/hterm_parser_identifiers.js
  // Copyright (c) 2015 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  /**
   * Collections of identifier for hterm.Parser.
   */
  hterm.Parser.identifiers = {};
  
  hterm.Parser.identifiers.modifierKeys = {
    Shift: 'shift',
    Ctrl: 'ctrl',
    Alt: 'alt',
    Meta: 'meta'
  };
  
  /**
   * Key codes useful when defining key sequences.
   *
   * Punctuation is mostly left out of this list because they can move around
   * based on keyboard locale and browser.
   *
   * In a key sequence like "Ctrl-ESC", the ESC comes from this list of
   * identifiers.  It is equivalent to "Ctrl-27" and "Ctrl-0x1b".
   */
  hterm.Parser.identifiers.keyCodes = {
    // Top row.
    ESC: 27,
    F1: 112,
    F2: 113,
    F3: 114,
    F4: 115,
    F5: 116,
    F6: 117,
    F7: 118,
    F8: 119,
    F9: 120,
    F10: 121,
    F11: 122,
    F12: 123,
  
    // Row two.
    ONE: 49,
    TWO: 50,
    THREE: 51,
    FOUR: 52,
    FIVE: 53,
    SIX: 54,
    SEVEN: 55,
    EIGHT: 56,
    NINE: 57,
    ZERO: 48,
    BACKSPACE: 8,
  
    // Row three.
    TAB: 9,
    Q: 81,
    W: 87,
    E: 69,
    R: 82,
    T: 84,
    Y: 89,
    U: 85,
    I: 73,
    O: 79,
    P: 80,
  
    // Row four.
    CAPSLOCK: 20,
    A: 65,
    S: 83,
    D: 68,
    F: 70,
    G: 71,
    H: 72,
    J: 74,
    K: 75,
    L: 76,
    ENTER: 13,
  
    // Row five.
    Z: 90,
    X: 88,
    C: 67,
    V: 86,
    B: 66,
    N: 78,
    M: 77,
  
    // Etc.
    SPACE: 32,
    PRINT_SCREEN: 42,
    SCROLL_LOCK: 145,
    BREAK: 19,
    INSERT: 45,
    HOME: 36,
    PGUP: 33,
    DEL: 46,
    END: 35,
    PGDOWN: 34,
    UP: 38,
    DOWN: 40,
    RIGHT: 39,
    LEFT: 37,
    NUMLOCK: 144,
  
    // Keypad
    KP0: 96,
    KP1: 97,
    KP2: 98,
    KP3: 99,
    KP4: 100,
    KP5: 101,
    KP6: 102,
    KP7: 103,
    KP8: 104,
    KP9: 105,
    KP_PLUS: 107,
    KP_MINUS: 109,
    KP_STAR: 106,
    KP_DIVIDE: 111,
    KP_DECIMAL: 110,
  
    // Chrome OS media keys
    NAVIGATE_BACK: 166,
    NAVIGATE_FORWARD: 167,
    RELOAD: 168,
    FULL_SCREEN: 183,
    WINDOW_OVERVIEW: 182,
    BRIGHTNESS_UP: 216,
    BRIGHTNESS_DOWN: 217
  };
  
  /**
   * Identifiers for use in key actions.
   */
  hterm.Parser.identifiers.actions = {
    /**
     * Prevent the browser and operating system from handling the event.
     */
    CANCEL: hterm.Keyboard.KeyActions.CANCEL,
  
    /**
     * Wait for a "keypress" event, send the keypress charCode to the host.
     */
    DEFAULT: hterm.Keyboard.KeyActions.DEFAULT,
  
    /**
     * Let the browser or operating system handle the key.
     */
    PASS: hterm.Keyboard.KeyActions.PASS,
  
    /**
     * Scroll the terminal one page up.
     */
    scrollPageUp: function(terminal) {
      terminal.scrollPageUp();
      return hterm.Keyboard.KeyActions.CANCEL;
    },
  
    /**
     * Scroll the terminal one page down.
     */
    scrollPageDown: function(terminal) {
      terminal.scrollPageDown();
      return hterm.Keyboard.KeyActions.CANCEL;
    },
  
    /**
     * Scroll the terminal to the top.
     */
    scrollToTop: function(terminal) {
      terminal.scrollEnd();
      return hterm.Keyboard.KeyActions.CANCEL;
    },
  
    /**
     * Scroll the terminal to the bottom.
     */
    scrollToBottom: function(terminal) {
      terminal.scrollEnd();
      return hterm.Keyboard.KeyActions.CANCEL;
    },
  
    /**
     * Clear the terminal and scrollback buffer.
     */
    clearScrollback: function(terminal) {
      terminal.wipeContents();
      return hterm.Keyboard.KeyActions.CANCEL;
    }
  };
  // SOURCE FILE: hterm/js/hterm_preference_manager.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  lib.rtdep('lib.f', 'lib.Storage');
  
  /**
   * PreferenceManager subclass managing global NaSSH preferences.
   *
   * This is currently just an ordered list of known connection profiles.
   */
  hterm.PreferenceManager = function(profileId) {
    lib.PreferenceManager.call(this, hterm.defaultStorage,
                               '/hterm/profiles/' + profileId);
    var defs = hterm.PreferenceManager.defaultPreferences;
    Object.keys(defs).forEach(function(key) {
      this.definePreference(key, defs[key][1]);
    }.bind(this));
  };
  
  hterm.PreferenceManager.categories = {};
  hterm.PreferenceManager.categories.Keyboard = 'Keyboard';
  hterm.PreferenceManager.categories.Appearance = 'Appearance';
  hterm.PreferenceManager.categories.CopyPaste = 'CopyPaste';
  hterm.PreferenceManager.categories.Sounds = 'Sounds';
  hterm.PreferenceManager.categories.Scrolling = 'Scrolling';
  hterm.PreferenceManager.categories.Encoding = 'Encoding';
  hterm.PreferenceManager.categories.Miscellaneous = 'Miscellaneous';
  
  /**
   * List of categories, ordered by display order (top to bottom)
   */
  hterm.PreferenceManager.categoryDefinitions = [
    { id: hterm.PreferenceManager.categories.Appearance,
      text: 'Appearance (fonts, colors, images)'},
    { id: hterm.PreferenceManager.categories.CopyPaste,
      text: 'Copy & Paste'},
    { id: hterm.PreferenceManager.categories.Encoding,
      text: 'Encoding'},
    { id: hterm.PreferenceManager.categories.Keyboard,
      text: 'Keyboard'},
    { id: hterm.PreferenceManager.categories.Scrolling,
      text: 'Scrolling'},
    { id: hterm.PreferenceManager.categories.Sounds,
      text: 'Sounds'},
    { id: hterm.PreferenceManager.categories.Miscellaneous,
      text: 'Misc.'}
  ];
  
  
  hterm.PreferenceManager.defaultPreferences = {
    'alt-gr-mode':
    [hterm.PreferenceManager.categories.Keyboard, null,
     [null, 'none', 'ctrl-alt', 'left-alt', 'right-alt'],
     'Select an AltGr detection hack^Wheuristic.\n' +
     '\n' +
     '\'null\': Autodetect based on navigator.language:\n' +
     '      \'en-us\' => \'none\', else => \'right-alt\'\n' +
     '\'none\': Disable any AltGr related munging.\n' +
     '\'ctrl-alt\': Assume Ctrl+Alt means AltGr.\n' +
     '\'left-alt\': Assume left Alt means AltGr.\n' +
     '\'right-alt\': Assume right Alt means AltGr.\n'],
  
    'alt-backspace-is-meta-backspace':
    [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
     'If set, undoes the Chrome OS Alt-Backspace->DEL remap, so that ' +
     'alt-backspace indeed is alt-backspace.'],
  
    'alt-is-meta':
    [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
     'Set whether the alt key acts as a meta key or as a distinct alt key.'],
  
    'alt-sends-what':
    [hterm.PreferenceManager.categories.Keyboard, 'escape',
     ['escape', '8-bit', 'browser-key'],
     'Controls how the alt key is handled.\n' +
     '\n' +
     '  escape....... Send an ESC prefix.\n' +
     '  8-bit........ Add 128 to the unshifted character as in xterm.\n' +
     '  browser-key.. Wait for the keypress event and see what the browser \n' +
     '                says.  (This won\'t work well on platforms where the \n' +
     '                browser performs a default action for some alt sequences.)'
    ],
  
    'audible-bell-sound':
    [hterm.PreferenceManager.categories.Sounds, 'lib-resource:hterm/audio/bell',
     'url',
     'URL of the terminal bell sound.  Empty string for no audible bell.'],
  
    'desktop-notification-bell':
    [hterm.PreferenceManager.categories.Sounds, false, 'bool',
     'If true, terminal bells in the background will create a Web ' +
     'Notification. http://www.w3.org/TR/notifications/\n' +
     '\n'+
     'Displaying notifications requires permission from the user. When this ' +
     'option is set to true, hterm will attempt to ask the user for permission ' +
     'if necessary. Note browsers may not show this permission request if it ' +
     'did not originate from a user action.\n' +
     '\n' +
     'Chrome extensions with the "notifications" permission have permission to ' +
     'display notifications.'],
  
    'background-color':
    [hterm.PreferenceManager.categories.Appearance, 'rgb(16, 16, 16)', 'color',
     'The background color for text with no other color attributes.'],
  
    'background-image':
    [hterm.PreferenceManager.categories.Appearance, '', 'string',
     'CSS value of the background image.  Empty string for no image.\n' +
     '\n' +
     'For example:\n' +
     '  url(https://goo.gl/anedTK)\n' +
     '  linear-gradient(top bottom, blue, red)'],
  
    'background-size':
    [hterm.PreferenceManager.categories.Appearance, '', 'string',
     'CSS value of the background image size.  Defaults to none.'],
  
    'background-position':
    [hterm.PreferenceManager.categories.Appearance, '', 'string',
     'CSS value of the background image position.\n' +
     '\n' +
     'For example:\n' +
     '  10% 10%\n' +
     '  center'],
  
    'backspace-sends-backspace':
    [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
     'If true, the backspace should send BS (\'\\x08\', aka ^H).  Otherwise ' +
     'the backspace key should send \'\\x7f\'.'],
  
    'character-map-overrides':
    [hterm.PreferenceManager.categories.Appearance, null, 'value',
      'This is specified as an object. It is a sparse array, where each '  +
      'property is the character set code and the value is an object that is ' +
      'a sparse array itself. In that sparse array, each property is the ' +
      'received character and the value is the displayed character.\n' +
      '\n' +
      'For example:\n' +
      '  {"0":{"+":"\\u2192",",":"\\u2190","-":"\\u2191",".":"\\u2193", ' +
      '"0":"\\u2588"}}'
    ],
  
    'close-on-exit':
    [hterm.PreferenceManager.categories.Miscellaneous, true, 'bool',
     'Whether or not to close the window when the command exits.'],
  
    'cursor-blink':
    [hterm.PreferenceManager.categories.Appearance, false, 'bool',
     'Whether or not to blink the cursor by default.'],
  
    'cursor-blink-cycle':
    [hterm.PreferenceManager.categories.Appearance, [1000, 500], 'value',
     'The cursor blink rate in milliseconds.\n' +
     '\n' +
     'A two element array, the first of which is how long the cursor should be ' +
     'on, second is how long it should be off.'],
  
    'cursor-color':
    [hterm.PreferenceManager.categories.Appearance, 'rgba(255, 0, 0, 0.5)',
     'color',
     'The color of the visible cursor.'],
  
    'color-palette-overrides':
    [hterm.PreferenceManager.categories.Appearance, null, 'value',
     'Override colors in the default palette.\n' +
     '\n' +
     'This can be specified as an array or an object.  If specified as an ' +
     'object it is assumed to be a sparse array, where each property ' +
     'is a numeric index into the color palette.\n' +
     '\n' +
     'Values can be specified as almost any css color value.  This ' +
     'includes #RGB, #RRGGBB, rgb(...), rgba(...), and any color names ' +
     'that are also part of the stock X11 rgb.txt file.\n' +
     '\n' +
     'You can use \'null\' to specify that the default value should be not ' +
     'be changed.  This is useful for skipping a small number of indicies ' +
     'when the value is specified as an array.'],
  
    'copy-on-select':
    [hterm.PreferenceManager.categories.CopyPaste, true, 'bool',
     'Automatically copy mouse selection to the clipboard.'],
  
    'use-default-window-copy':
    [hterm.PreferenceManager.categories.CopyPaste, true, 'bool',
     'Whether to use the default window copy behaviour'],
  
    'clear-selection-after-copy':
    [hterm.PreferenceManager.categories.CopyPaste, true, 'bool',
     'Whether to clear the selection after copying.'],
  
    'ctrl-plus-minus-zero-zoom':
    [hterm.PreferenceManager.categories.Keyboard, true, 'bool',
     'If true, Ctrl-Plus/Minus/Zero controls zoom.\n' +
     'If false, Ctrl-Shift-Plus/Minus/Zero controls zoom, Ctrl-Minus sends ^_, ' +
     'Ctrl-Plus/Zero do nothing.'],
  
    'ctrl-c-copy':
    [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
     'Ctrl+C copies if true, send ^C to host if false.\n' +
     'Ctrl+Shift+C sends ^C to host if true, copies if false.'],
  
    'ctrl-v-paste':
    [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
     'Ctrl+V pastes if true, send ^V to host if false.\n' +
     'Ctrl+Shift+V sends ^V to host if true, pastes if false.'],
  
    'east-asian-ambiguous-as-two-column':
    [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
     'Set whether East Asian Ambiguous characters have two column width.'],
  
    'enable-8-bit-control':
    [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
     'True to enable 8-bit control characters, false to ignore them.\n' +
     '\n' +
     'We\'ll respect the two-byte versions of these control characters ' +
     'regardless of this setting.'],
  
    'enable-bold':
    [hterm.PreferenceManager.categories.Appearance, null, 'tristate',
     'True if we should use bold weight font for text with the bold/bright ' +
     'attribute.  False to use the normal weight font.  Null to autodetect.'],
  
    'enable-bold-as-bright':
    [hterm.PreferenceManager.categories.Appearance, true, 'bool',
     'True if we should use bright colors (8-15 on a 16 color palette) ' +
     'for any text with the bold attribute.  False otherwise.'],
  
    'enable-clipboard-notice':
    [hterm.PreferenceManager.categories.CopyPaste, true, 'bool',
     'Show a message in the terminal when the host writes to the clipboard.'],
  
    'enable-clipboard-write':
    [hterm.PreferenceManager.categories.CopyPaste, true, 'bool',
     'Allow the host to write directly to the system clipboard.'],
  
    'enable-dec12':
    [hterm.PreferenceManager.categories.Miscellaneous, false, 'bool',
     'Respect the host\'s attempt to change the cursor blink status using ' +
     'DEC Private Mode 12.'],
  
    'environment':
    [hterm.PreferenceManager.categories.Miscellaneous, {'TERM': 'xterm-256color'},
     'value',
     'The default environment variables, as an object.'],
  
    'font-family':
    [hterm.PreferenceManager.categories.Appearance,
     '"DejaVu Sans Mono", "Everson Mono", FreeMono, "Menlo", "Terminal", ' +
     'monospace', 'string',
     'Default font family for the terminal text.'],
  
    'font-size':
    [hterm.PreferenceManager.categories.Appearance, 15, 'int',
     'The default font size in pixels.'],
  
    'font-smoothing':
    [hterm.PreferenceManager.categories.Appearance, 'antialiased', 'string',
     'CSS font-smoothing property.'],
  
    'foreground-color':
    [hterm.PreferenceManager.categories.Appearance, 'rgb(240, 240, 240)', 'color',
     'The foreground color for text with no other color attributes.'],
  
    'home-keys-scroll':
    [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
     'If true, home/end will control the terminal scrollbar and shift home/end ' +
     'will send the VT keycodes.  If false then home/end sends VT codes and ' +
     'shift home/end scrolls.'],
  
    'keybindings':
    [hterm.PreferenceManager.categories.Keyboard, null, 'value',
     'A map of key sequence to key actions.  Key sequences include zero or ' +
     'more modifier keys followed by a key code.  Key codes can be decimal or ' +
     'hexadecimal numbers, or a key identifier.  Key actions can be specified ' +
     'a string to send to the host, or an action identifier.  For a full ' +
     'list of key code and action identifiers, see https://goo.gl/8AoD09.' +
     '\n' +
     '\n' +
     'Sample keybindings:\n' +
     '{ "Ctrl-Alt-K": "clearScrollback",\n' +
     '  "Ctrl-Shift-L": "PASS",\n' +
     '  "Ctrl-H": "\'HELLO\\n\'"\n' +
     '}'],
  
    'max-string-sequence':
    [hterm.PreferenceManager.categories.Encoding, 100000, 'int',
     'Max length of a DCS, OSC, PM, or APS sequence before we give up and ' +
     'ignore the code.'],
  
    'media-keys-are-fkeys':
    [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
     'If true, convert media keys to their Fkey equivalent. If false, let ' +
     'the browser handle the keys.'],
  
    'meta-sends-escape':
    [hterm.PreferenceManager.categories.Keyboard, true, 'bool',
     'Set whether the meta key sends a leading escape or not.'],
  
    'mouse-paste-button':
    [hterm.PreferenceManager.categories.CopyPaste, null,
     [null, 0, 1, 2, 3, 4, 5, 6],
     'Mouse paste button, or null to autodetect.\n' +
     '\n' +
     'For autodetect, we\'ll try to enable middle button paste for non-X11 ' +
     'platforms.  On X11 we move it to button 3.'],
  
    'page-keys-scroll':
    [hterm.PreferenceManager.categories.Keyboard, false, 'bool',
     'If true, page up/down will control the terminal scrollbar and shift ' +
     'page up/down will send the VT keycodes.  If false then page up/down ' +
     'sends VT codes and shift page up/down scrolls.'],
  
    'pass-alt-number':
    [hterm.PreferenceManager.categories.Keyboard, null, 'tristate',
     'Set whether we should pass Alt-1..9 to the browser.\n' +
     '\n' +
     'This is handy when running hterm in a browser tab, so that you don\'t ' +
     'lose Chrome\'s "switch to tab" keyboard accelerators.  When not running ' +
     'in a tab it\'s better to send these keys to the host so they can be ' +
     'used in vim or emacs.\n' +
     '\n' +
     'If true, Alt-1..9 will be handled by the browser.  If false, Alt-1..9 ' +
     'will be sent to the host.  If null, autodetect based on browser platform ' +
     'and window type.'],
  
    'pass-ctrl-number':
    [hterm.PreferenceManager.categories.Keyboard, null, 'tristate',
     'Set whether we should pass Ctrl-1..9 to the browser.\n' +
     '\n' +
     'This is handy when running hterm in a browser tab, so that you don\'t ' +
     'lose Chrome\'s "switch to tab" keyboard accelerators.  When not running ' +
     'in a tab it\'s better to send these keys to the host so they can be ' +
     'used in vim or emacs.\n' +
     '\n' +
     'If true, Ctrl-1..9 will be handled by the browser.  If false, Ctrl-1..9 ' +
     'will be sent to the host.  If null, autodetect based on browser platform ' +
     'and window type.'],
  
     'pass-meta-number':
    [hterm.PreferenceManager.categories.Keyboard, null, 'tristate',
     'Set whether we should pass Meta-1..9 to the browser.\n' +
     '\n' +
     'This is handy when running hterm in a browser tab, so that you don\'t ' +
     'lose Chrome\'s "switch to tab" keyboard accelerators.  When not running ' +
     'in a tab it\'s better to send these keys to the host so they can be ' +
     'used in vim or emacs.\n' +
     '\n' +
     'If true, Meta-1..9 will be handled by the browser.  If false, Meta-1..9 ' +
     'will be sent to the host.  If null, autodetect based on browser platform ' +
     'and window type.'],
  
    'pass-meta-v':
    [hterm.PreferenceManager.categories.Keyboard, true, 'bool',
     'Set whether meta-V gets passed to host.'],
  
    'receive-encoding':
    [hterm.PreferenceManager.categories.Encoding, 'utf-8', ['utf-8', 'raw'],
     'Set the expected encoding for data received from the host.\n' +
     '\n' +
     'Valid values are \'utf-8\' and \'raw\'.'],
  
    'scroll-on-keystroke':
    [hterm.PreferenceManager.categories.Scrolling, true, 'bool',
     'If true, scroll to the bottom on any keystroke.'],
  
    'scroll-on-output':
    [hterm.PreferenceManager.categories.Scrolling, false, 'bool',
     'If true, scroll to the bottom on terminal output.'],
  
    'scrollbar-visible':
    [hterm.PreferenceManager.categories.Scrolling, true, 'bool',
     'The vertical scrollbar mode.'],
  
    'scroll-wheel-move-multiplier':
    [hterm.PreferenceManager.categories.Scrolling, 1, 'int',
     'The multiplier for the pixel delta in mousewheel event caused by the ' +
     'scroll wheel. Alters how fast the page scrolls.'],
  
    'send-encoding':
    [hterm.PreferenceManager.categories.Encoding, 'utf-8', ['utf-8', 'raw'],
     'Set the encoding for data sent to host.'],
  
    'shift-insert-paste':
    [hterm.PreferenceManager.categories.Keyboard, true, 'bool',
     'Shift + Insert pastes if true, sent to host if false.'],
  
    'user-css':
    [hterm.PreferenceManager.categories.Appearance, '', 'url',
     'URL of user stylesheet to include in the terminal document.']
  };
  
  hterm.PreferenceManager.prototype = {
    __proto__: lib.PreferenceManager.prototype
  };
  // SOURCE FILE: hterm/js/hterm_pubsub.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  /**
   * Utility class used to add publish/subscribe/unsubscribe functionality to
   * an existing object.
   */
  hterm.PubSub = function() {
    this.observers_ = {};
  };
  
  /**
   * Add publish, subscribe, and unsubscribe methods to an existing object.
   *
   * No other properties of the object are touched, so there is no need to
   * worry about clashing private properties.
   *
   * @param {Object} obj The object to add this behavior to.
   */
  hterm.PubSub.addBehavior = function(obj) {
    var pubsub = new hterm.PubSub();
    for (var m in hterm.PubSub.prototype) {
      obj[m] = hterm.PubSub.prototype[m].bind(pubsub);
    }
  };
  
  /**
   * Subscribe to be notified of messages about a subject.
   *
   * @param {string} subject The subject to subscribe to.
   * @param {function(Object)} callback The function to invoke for notifications.
   */
  hterm.PubSub.prototype.subscribe = function(subject, callback) {
    if (!(subject in this.observers_))
      this.observers_[subject] = [];
  
    this.observers_[subject].push(callback);
  };
  
  /**
   * Unsubscribe from a subject.
   *
   * @param {string} subject The subject to unsubscribe from.
   * @param {function(Object)} callback A callback previously registered via
   *     subscribe().
   */
  hterm.PubSub.prototype.unsubscribe = function(subject, callback) {
    var list = this.observers_[subject];
    if (!list)
      throw 'Invalid subject: ' + subject;
  
    var i = list.indexOf(callback);
    if (i < 0)
      throw 'Not subscribed: ' + subject;
  
    list.splice(i, 1);
  };
  
  /**
   * Publish a message about a subject.
   *
   * Subscribers (and the optional final callback) are invoked asynchronously.
   * This method will return before anyone is actually notified.
   *
   * @param {string} subject The subject to publish about.
   * @param {Object} e An arbitrary object associated with this notification.
   * @param {function(Object)} opt_lastCallback An optional function to call after
   *     all subscribers have been notified.
   */
  hterm.PubSub.prototype.publish = function(subject, e, opt_lastCallback) {
    function notifyList(i) {
      // Set this timeout before invoking the callback, so we don't have to
      // concern ourselves with exceptions.
      if (i < list.length - 1)
        setTimeout(notifyList, 0, i + 1);
  
      list[i](e);
    }
  
    var list = this.observers_[subject];
    if (list) {
      // Copy the list, in case it changes while we're notifying.
      list = [].concat(list);
    }
  
    if (opt_lastCallback) {
      if (list) {
        list.push(opt_lastCallback);
      } else {
        list = [opt_lastCallback];
      }
    }
  
    if (list)
      setTimeout(notifyList, 0, 0);
  };
  // SOURCE FILE: hterm/js/hterm_screen.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  lib.rtdep('lib.f', 'lib.wc',
            'hterm.RowCol', 'hterm.Size', 'hterm.TextAttributes');
  
  /**
   * @fileoverview This class represents a single terminal screen full of text.
   *
   * It maintains the current cursor position and has basic methods for text
   * insert and overwrite, and adding or removing rows from the screen.
   *
   * This class has no knowledge of the scrollback buffer.
   *
   * The number of rows on the screen is determined only by the number of rows
   * that the caller inserts into the screen.  If a caller wants to ensure a
   * constant number of rows on the screen, it's their responsibility to remove a
   * row for each row inserted.
   *
   * The screen width, in contrast, is enforced locally.
   *
   *
   * In practice...
   * - The hterm.Terminal class holds two hterm.Screen instances.  One for the
   * primary screen and one for the alternate screen.
   *
   * - The html.Screen class only cares that rows are HTMLElements.  In the
   * larger context of hterm, however, the rows happen to be displayed by an
   * hterm.ScrollPort and have to follow a few rules as a result.  Each
   * row must be rooted by the custom HTML tag 'x-row', and each must have a
   * rowIndex property that corresponds to the index of the row in the context
   * of the scrollback buffer.  These invariants are enforced by hterm.Terminal
   * because that is the class using the hterm.Screen in the context of an
   * hterm.ScrollPort.
   */
  
  /**
   * Create a new screen instance.
   *
   * The screen initially has no rows and a maximum column count of 0.
   *
   * @param {integer} opt_columnCount The maximum number of columns for this
   *    screen.  See insertString() and overwriteString() for information about
   *    what happens when too many characters are added too a row.  Defaults to
   *    0 if not provided.
   */
  hterm.Screen = function(opt_columnCount) {
    /**
     * Public, read-only access to the rows in this screen.
     */
    this.rowsArray = [];
  
    // The max column width for this screen.
    this.columnCount_ = opt_columnCount || 80;
  
    // The current color, bold, underline and blink attributes.
    this.textAttributes = new hterm.TextAttributes(window.document);
  
    // Current zero-based cursor coordinates.
    this.cursorPosition = new hterm.RowCol(0, 0);
  
    // The node containing the row that the cursor is positioned on.
    this.cursorRowNode_ = null;
  
    // The node containing the span of text that the cursor is positioned on.
    this.cursorNode_ = null;
  
    // The offset in column width into cursorNode_ where the cursor is positioned.
    this.cursorOffset_ = null;
  };
  
  /**
   * Return the screen size as an hterm.Size object.
   *
   * @return {hterm.Size} hterm.Size object representing the current number
   *     of rows and columns in this screen.
   */
  hterm.Screen.prototype.getSize = function() {
    return new hterm.Size(this.columnCount_, this.rowsArray.length);
  };
  
  /**
   * Return the current number of rows in this screen.
   *
   * @return {integer} The number of rows in this screen.
   */
  hterm.Screen.prototype.getHeight = function() {
    return this.rowsArray.length;
  };
  
  /**
   * Return the current number of columns in this screen.
   *
   * @return {integer} The number of columns in this screen.
   */
  hterm.Screen.prototype.getWidth = function() {
    return this.columnCount_;
  };
  
  /**
   * Set the maximum number of columns per row.
   *
   * @param {integer} count The maximum number of columns per row.
   */
  hterm.Screen.prototype.setColumnCount = function(count) {
    this.columnCount_ = count;
  
    if (this.cursorPosition.column >= count)
      this.setCursorPosition(this.cursorPosition.row, count - 1);
  };
  
  /**
   * Remove the first row from the screen and return it.
   *
   * @return {HTMLElement} The first row in this screen.
   */
  hterm.Screen.prototype.shiftRow = function() {
    return this.shiftRows(1)[0];
  };
  
  /**
   * Remove rows from the top of the screen and return them as an array.
   *
   * @param {integer} count The number of rows to remove.
   * @return {Array.<HTMLElement>} The selected rows.
   */
  hterm.Screen.prototype.shiftRows = function(count) {
    return this.rowsArray.splice(0, count);
  };
  
  /**
   * Insert a row at the top of the screen.
   *
   * @param {HTMLElement} The row to insert.
   */
  hterm.Screen.prototype.unshiftRow = function(row) {
    this.rowsArray.splice(0, 0, row);
  };
  
  /**
   * Insert rows at the top of the screen.
   *
   * @param {Array.<HTMLElement>} The rows to insert.
   */
  hterm.Screen.prototype.unshiftRows = function(rows) {
    this.rowsArray.unshift.apply(this.rowsArray, rows);
  };
  
  /**
   * Remove the last row from the screen and return it.
   *
   * @return {HTMLElement} The last row in this screen.
   */
  hterm.Screen.prototype.popRow = function() {
    return this.popRows(1)[0];
  };
  
  /**
   * Remove rows from the bottom of the screen and return them as an array.
   *
   * @param {integer} count The number of rows to remove.
   * @return {Array.<HTMLElement>} The selected rows.
   */
  hterm.Screen.prototype.popRows = function(count) {
    return this.rowsArray.splice(this.rowsArray.length - count, count);
  };
  
  /**
   * Insert a row at the bottom of the screen.
   *
   * @param {HTMLElement} The row to insert.
   */
  hterm.Screen.prototype.pushRow = function(row) {
    this.rowsArray.push(row);
  };
  
  /**
   * Insert rows at the bottom of the screen.
   *
   * @param {Array.<HTMLElement>} The rows to insert.
   */
  hterm.Screen.prototype.pushRows = function(rows) {
    rows.push.apply(this.rowsArray, rows);
  };
  
  /**
   * Insert a row at the specified column of the screen.
   *
   * @param {HTMLElement} The row to insert.
   */
  hterm.Screen.prototype.insertRow = function(index, row) {
    this.rowsArray.splice(index, 0, row);
  };
  
  /**
   * Insert rows at the specified column of the screen.
   *
   * @param {Array.<HTMLElement>} The rows to insert.
   */
  hterm.Screen.prototype.insertRows = function(index, rows) {
    for (var i = 0; i < rows.length; i++) {
      this.rowsArray.splice(index + i, 0, rows[i]);
    }
  };
  
  /**
   * Remove a last row from the specified column of the screen and return it.
   *
   * @return {HTMLElement} The selected row.
   */
  hterm.Screen.prototype.removeRow = function(index) {
    return this.rowsArray.splice(index, 1)[0];
  };
  
  /**
   * Remove rows from the bottom of the screen and return them as an array.
   *
   * @param {integer} count The number of rows to remove.
   * @return {Array.<HTMLElement>} The selected rows.
   */
  hterm.Screen.prototype.removeRows = function(index, count) {
    return this.rowsArray.splice(index, count);
  };
  
  /**
   * Invalidate the current cursor position.
   *
   * This sets this.cursorPosition to (0, 0) and clears out some internal
   * data.
   *
   * Attempting to insert or overwrite text while the cursor position is invalid
   * will raise an obscure exception.
   */
  hterm.Screen.prototype.invalidateCursorPosition = function() {
    this.cursorPosition.move(0, 0);
    this.cursorRowNode_ = null;
    this.cursorNode_ = null;
    this.cursorOffset_ = null;
  };
  
  /**
   * Clear the contents of the cursor row.
   */
  hterm.Screen.prototype.clearCursorRow = function() {
    this.cursorRowNode_.innerHTML = '';
    this.cursorRowNode_.removeAttribute('line-overflow');
    this.cursorOffset_ = 0;
    this.cursorPosition.column = 0;
    this.cursorPosition.overflow = false;
  
    var text;
    if (this.textAttributes.isDefault()) {
      text = '';
    } else {
      text = lib.f.getWhitespace(this.columnCount_);
    }
  
    // We shouldn't honour inverse colors when clearing an area, to match
    // xterm's back color erase behaviour.
    var inverse = this.textAttributes.inverse;
    this.textAttributes.inverse = false;
    this.textAttributes.syncColors();
  
    var node = this.textAttributes.createContainer(text);
    this.cursorRowNode_.appendChild(node);
    this.cursorNode_ = node;
  
    this.textAttributes.inverse = inverse;
    this.textAttributes.syncColors();
  };
  
  /**
   * Mark the current row as having overflowed to the next line.
   *
   * The line overflow state is used when converting a range of rows into text.
   * It makes it possible to recombine two or more overflow terminal rows into
   * a single line.
   *
   * This is distinct from the cursor being in the overflow state.  Cursor
   * overflow indicates that printing at the cursor position will commit a
   * line overflow, unless it is preceded by a repositioning of the cursor
   * to a non-overflow state.
   */
  hterm.Screen.prototype.commitLineOverflow = function() {
    this.cursorRowNode_.setAttribute('line-overflow', true);
  };
  
  /**
   * Relocate the cursor to a give row and column.
   *
   * @param {integer} row The zero based row.
   * @param {integer} column The zero based column.
   */
  hterm.Screen.prototype.setCursorPosition = function(row, column) {
    if (!this.rowsArray.length) {
      console.warn('Attempt to set cursor position on empty screen.');
      return;
    }
  
    if (row >= this.rowsArray.length) {
      console.error('Row out of bounds: ' + row);
      row = this.rowsArray.length - 1;
    } else if (row < 0) {
      console.error('Row out of bounds: ' + row);
      row = 0;
    }
  
    if (column >= this.columnCount_) {
      console.error('Column out of bounds: ' + column);
      column = this.columnCount_ - 1;
    } else if (column < 0) {
      console.error('Column out of bounds: ' + column);
      column = 0;
    }
  
    this.cursorPosition.overflow = false;
  
    var rowNode = this.rowsArray[row];
    var node = rowNode.firstChild;
  
    if (!node) {
      node = rowNode.ownerDocument.createTextNode('');
      rowNode.appendChild(node);
    }
  
    var currentColumn = 0;
  
    if (rowNode == this.cursorRowNode_) {
      if (column >= this.cursorPosition.column - this.cursorOffset_) {
        node = this.cursorNode_;
        currentColumn = this.cursorPosition.column - this.cursorOffset_;
      }
    } else {
      this.cursorRowNode_ = rowNode;
    }
  
    this.cursorPosition.move(row, column);
  
    while (node) {
      var offset = column - currentColumn;
      var width = hterm.TextAttributes.nodeWidth(node);
      if (!node.nextSibling || width > offset) {
        this.cursorNode_ = node;
        this.cursorOffset_ = offset;
        return;
      }
  
      currentColumn += width;
      node = node.nextSibling;
    }
  };
  
  /**
   * Set the provided selection object to be a caret selection at the current
   * cursor position.
   */
  hterm.Screen.prototype.syncSelectionCaret = function(selection) {
    try {
      selection.collapse(this.cursorNode_, this.cursorOffset_);
    } catch (firefoxIgnoredException) {
      // FF can throw an exception if the range is off, rather than just not
      // performing the collapse.
    }
  };
  
  /**
   * Split a single node into two nodes at the given offset.
   *
   * For example:
   * Given the DOM fragment '<div><span>Hello World</span></div>', call splitNode_
   * passing the span and an offset of 6.  This would modifiy the fragment to
   * become: '<div><span>Hello </span><span>World</span></div>'.  If the span
   * had any attributes they would have been copied to the new span as well.
   *
   * The to-be-split node must have a container, so that the new node can be
   * placed next to it.
   *
   * @param {HTMLNode} node The node to split.
   * @param {integer} offset The offset into the node where the split should
   *     occur.
   */
  hterm.Screen.prototype.splitNode_ = function(node, offset) {
    var afterNode = node.cloneNode(false);
  
    var textContent = node.textContent;
    node.textContent = hterm.TextAttributes.nodeSubstr(node, 0, offset);
    afterNode.textContent = lib.wc.substr(textContent, offset);
  
    if (afterNode.textContent)
      node.parentNode.insertBefore(afterNode, node.nextSibling);
    if (!node.textContent)
      node.parentNode.removeChild(node);
  };
  
  /**
   * Ensure that text is clipped and the cursor is clamped to the column count.
   */
  hterm.Screen.prototype.maybeClipCurrentRow = function() {
    var width = hterm.TextAttributes.nodeWidth(this.cursorRowNode_);
  
    if (width <= this.columnCount_) {
      // Current row does not need clipping, but may need clamping.
      if (this.cursorPosition.column >= this.columnCount_) {
        this.setCursorPosition(this.cursorPosition.row, this.columnCount_ - 1);
        this.cursorPosition.overflow = true;
      }
  
      return;
    }
  
    // Save off the current column so we can maybe restore it later.
    var currentColumn = this.cursorPosition.column;
  
    // Move the cursor to the final column.
    this.setCursorPosition(this.cursorPosition.row, this.columnCount_ - 1);
  
    // Remove any text that partially overflows.
    width = hterm.TextAttributes.nodeWidth(this.cursorNode_);
  
    if (this.cursorOffset_ < width - 1) {
      this.cursorNode_.textContent = hterm.TextAttributes.nodeSubstr(
          this.cursorNode_, 0, this.cursorOffset_ + 1);
    }
  
    // Remove all nodes after the cursor.
    var rowNode = this.cursorRowNode_;
    var node = this.cursorNode_.nextSibling;
  
    while (node) {
      rowNode.removeChild(node);
      node = this.cursorNode_.nextSibling;
    }
  
    if (currentColumn < this.columnCount_) {
      // If the cursor was within the screen before we started then restore its
      // position.
      this.setCursorPosition(this.cursorPosition.row, currentColumn);
    } else {
      // Otherwise leave it at the the last column in the overflow state.
      this.cursorPosition.overflow = true;
    }
  };
  
  /**
   * Insert a string at the current character position using the current
   * text attributes.
   *
   * You must call maybeClipCurrentRow() after in order to clip overflowed
   * text and clamp the cursor.
   *
   * It is also up to the caller to properly maintain the line overflow state
   * using hterm.Screen..commitLineOverflow().
   */
  hterm.Screen.prototype.insertString = function(str) {
    var cursorNode = this.cursorNode_;
    var cursorNodeText = cursorNode.textContent;
  
    this.cursorRowNode_.removeAttribute('line-overflow');
  
    // We may alter the width of the string by prepending some missing
    // whitespaces, so we need to record the string width ahead of time.
    var strWidth = lib.wc.strWidth(str);
  
    // No matter what, before this function exits the cursor column will have
    // moved this much.
    this.cursorPosition.column += strWidth;
  
    // Local cache of the cursor offset.
    var offset = this.cursorOffset_;
  
    // Reverse offset is the offset measured from the end of the string.
    // Zero implies that the cursor is at the end of the cursor node.
    var reverseOffset = hterm.TextAttributes.nodeWidth(cursorNode) - offset;
  
    if (reverseOffset < 0) {
      // A negative reverse offset means the cursor is positioned past the end
      // of the characters on this line.  We'll need to insert the missing
      // whitespace.
      var ws = lib.f.getWhitespace(-reverseOffset);
  
      // This whitespace should be completely unstyled.  Underline, background
      // color, and strikethrough would be visible on whitespace, so we can't use
      // one of those spans to hold the text.
      if (!(this.textAttributes.underline ||
            this.textAttributes.strikethrough ||
            this.textAttributes.background ||
            this.textAttributes.wcNode ||
            this.textAttributes.tileData != null)) {
        // Best case scenario, we can just pretend the spaces were part of the
        // original string.
        str = ws + str;
      } else if (cursorNode.nodeType == 3 ||
                 !(cursorNode.wcNode ||
                   cursorNode.tileNode ||
                   cursorNode.style.textDecoration ||
                   cursorNode.style.backgroundColor)) {
        // Second best case, the current node is able to hold the whitespace.
        cursorNode.textContent = (cursorNodeText += ws);
      } else {
        // Worst case, we have to create a new node to hold the whitespace.
        var wsNode = cursorNode.ownerDocument.createTextNode(ws);
        this.cursorRowNode_.insertBefore(wsNode, cursorNode.nextSibling);
        this.cursorNode_ = cursorNode = wsNode;
        this.cursorOffset_ = offset = -reverseOffset;
        cursorNodeText = ws;
      }
  
      // We now know for sure that we're at the last character of the cursor node.
      reverseOffset = 0;
    }
  
    if (this.textAttributes.matchesContainer(cursorNode)) {
      // The new text can be placed directly in the cursor node.
      if (reverseOffset == 0) {
        cursorNode.textContent = cursorNodeText + str;
      } else if (offset == 0) {
        cursorNode.textContent = str + cursorNodeText;
      } else {
        cursorNode.textContent =
            hterm.TextAttributes.nodeSubstr(cursorNode, 0, offset) +
            str + hterm.TextAttributes.nodeSubstr(cursorNode, offset);
      }
  
      this.cursorOffset_ += strWidth;
      return;
    }
  
    // The cursor node is the wrong style for the new text.  If we're at the
    // beginning or end of the cursor node, then the adjacent node is also a
    // potential candidate.
  
    if (offset == 0) {
      // At the beginning of the cursor node, the check the previous sibling.
      var previousSibling = cursorNode.previousSibling;
      if (previousSibling &&
          this.textAttributes.matchesContainer(previousSibling)) {
        previousSibling.textContent += str;
        this.cursorNode_ = previousSibling;
        this.cursorOffset_ = lib.wc.strWidth(previousSibling.textContent);
        return;
      }
  
      var newNode = this.textAttributes.createContainer(str);
      this.cursorRowNode_.insertBefore(newNode, cursorNode);
      this.cursorNode_ = newNode;
      this.cursorOffset_ = strWidth;
      return;
    }
  
    if (reverseOffset == 0) {
      // At the end of the cursor node, the check the next sibling.
      var nextSibling = cursorNode.nextSibling;
      if (nextSibling &&
          this.textAttributes.matchesContainer(nextSibling)) {
        nextSibling.textContent = str + nextSibling.textContent;
        this.cursorNode_ = nextSibling;
        this.cursorOffset_ = lib.wc.strWidth(str);
        return;
      }
  
      var newNode = this.textAttributes.createContainer(str);
      this.cursorRowNode_.insertBefore(newNode, nextSibling);
      this.cursorNode_ = newNode;
      // We specifically need to include any missing whitespace here, since it's
      // going in a new node.
      this.cursorOffset_ = hterm.TextAttributes.nodeWidth(newNode);
      return;
    }
  
    // Worst case, we're somewhere in the middle of the cursor node.  We'll
    // have to split it into two nodes and insert our new container in between.
    this.splitNode_(cursorNode, offset);
    var newNode = this.textAttributes.createContainer(str);
    this.cursorRowNode_.insertBefore(newNode, cursorNode.nextSibling);
    this.cursorNode_ = newNode;
    this.cursorOffset_ = strWidth;
  };
  
  /**
   * Overwrite the text at the current cursor position.
   *
   * You must call maybeClipCurrentRow() after in order to clip overflowed
   * text and clamp the cursor.
   *
   * It is also up to the caller to properly maintain the line overflow state
   * using hterm.Screen..commitLineOverflow().
   */
  hterm.Screen.prototype.overwriteString = function(str) {
    var maxLength = this.columnCount_ - this.cursorPosition.column;
    if (!maxLength)
      return [str];
  
    var width = lib.wc.strWidth(str);
    if (this.textAttributes.matchesContainer(this.cursorNode_) &&
        this.cursorNode_.textContent.substr(this.cursorOffset_) == str) {
      // This overwrite would be a no-op, just move the cursor and return.
      this.cursorOffset_ += width;
      this.cursorPosition.column += width;
      return;
    }
  
    this.deleteChars(Math.min(width, maxLength));
    this.insertString(str);
  };
  
  /**
   * Forward-delete one or more characters at the current cursor position.
   *
   * Text to the right of the deleted characters is shifted left.  Only affects
   * characters on the same row as the cursor.
   *
   * @param {integer} count The column width of characters to delete.  This is
   *     clamped to the column width minus the cursor column.
   * @return {integer} The column width of the characters actually deleted.
   */
  hterm.Screen.prototype.deleteChars = function(count) {
    var node = this.cursorNode_;
    var offset = this.cursorOffset_;
  
    var currentCursorColumn = this.cursorPosition.column;
    count = Math.min(count, this.columnCount_ - currentCursorColumn);
    if (!count)
      return 0;
  
    var rv = count;
    var startLength, endLength;
  
    while (node && count) {
      startLength = hterm.TextAttributes.nodeWidth(node);
      node.textContent = hterm.TextAttributes.nodeSubstr(node, 0, offset) +
          hterm.TextAttributes.nodeSubstr(node, offset + count);
      endLength = hterm.TextAttributes.nodeWidth(node);
      count -= startLength - endLength;
      if (offset < startLength && endLength && startLength == endLength) {
        // No characters were deleted when there should be.  We're probably trying
        // to delete one column width from a wide character node.  We remove the
        // wide character node here and replace it with a single space.
        var spaceNode = this.textAttributes.createContainer(' ');
        node.parentNode.insertBefore(spaceNode, node.nextSibling);
        node.textContent = '';
        endLength = 0;
        count -= 1;
      }
  
      var nextNode = node.nextSibling;
      if (endLength == 0 && node != this.cursorNode_) {
        node.parentNode.removeChild(node);
      }
      node = nextNode;
      offset = 0;
    }
  
    // Remove this.cursorNode_ if it is an empty non-text node.
    if (this.cursorNode_.nodeType != 3 && !this.cursorNode_.textContent) {
      var cursorNode = this.cursorNode_;
      if (cursorNode.previousSibling) {
        this.cursorNode_ = cursorNode.previousSibling;
        this.cursorOffset_ = hterm.TextAttributes.nodeWidth(
            cursorNode.previousSibling);
      } else if (cursorNode.nextSibling) {
        this.cursorNode_ = cursorNode.nextSibling;
        this.cursorOffset_ = 0;
      } else {
        var emptyNode = this.cursorRowNode_.ownerDocument.createTextNode('');
        this.cursorRowNode_.appendChild(emptyNode);
        this.cursorNode_ = emptyNode;
        this.cursorOffset_ = 0;
      }
      this.cursorRowNode_.removeChild(cursorNode);
    }
  
    return rv;
  };
  
  /**
   * Finds first X-ROW of a line containing specified X-ROW.
   * Used to support line overflow.
   *
   * @param {Node} row X-ROW to begin search for first row of line.
   * @return {Node} The X-ROW that is at the beginning of the line.
   **/
  hterm.Screen.prototype.getLineStartRow_ = function(row) {
    while (row.previousSibling &&
           row.previousSibling.hasAttribute('line-overflow')) {
      row = row.previousSibling;
    }
    return row;
  };
  
  /**
   * Gets text of a line beginning with row.
   * Supports line overflow.
   *
   * @param {Node} row First X-ROW of line.
   * @return {string} Text content of line.
   **/
  hterm.Screen.prototype.getLineText_ = function(row) {
    var rowText = "";
    while (row) {
      rowText += row.textContent;
      if (row.hasAttribute('line-overflow')) {
        row = row.nextSibling;
      } else {
        break;
      }
    }
    return rowText;
  };
  
  /**
   * Returns X-ROW that is ancestor of the node.
   *
   * @param {Node} node Node to get X-ROW ancestor for.
   * @return {Node} X-ROW ancestor of node, or null if not found.
   **/
  hterm.Screen.prototype.getXRowAncestor_ = function(node) {
    while (node) {
      if (node.nodeName === 'X-ROW')
        break;
      node = node.parentNode;
    }
    return node;
  };
  
  /**
   * Returns position within line of character at offset within node.
   * Supports line overflow.
   *
   * @param {Node} row X-ROW at beginning of line.
   * @param {Node} node Node to get position of.
   * @param {integer} offset Offset into node.
   *
   * @return {integer} Position within line of character at offset within node.
   **/
  hterm.Screen.prototype.getPositionWithOverflow_ = function(row, node, offset) {
    if (!node)
      return -1;
    var ancestorRow = this.getXRowAncestor_(node);
    if (!ancestorRow)
      return -1;
    var position = 0;
    while (ancestorRow != row) {
      position += hterm.TextAttributes.nodeWidth(row);
      if (row.hasAttribute('line-overflow') && row.nextSibling) {
        row = row.nextSibling;
      } else {
        return -1;
      }
    }
    return position + this.getPositionWithinRow_(row, node, offset);
  };
  
  /**
   * Returns position within row of character at offset within node.
   * Does not support line overflow.
   *
   * @param {Node} row X-ROW to get position within.
   * @param {Node} node Node to get position for.
   * @param {integer} offset Offset within node to get position for.
   * @return {integer} Position within row of character at offset within node.
   **/
  hterm.Screen.prototype.getPositionWithinRow_ = function(row, node, offset) {
    if (node.parentNode != row) {
      return this.getPositionWithinRow_(node.parentNode, node, offset) +
             this.getPositionWithinRow_(row, node.parentNode, 0);
    }
    var position = 0;
    for (var i = 0; i < row.childNodes.length; i++) {
      var currentNode = row.childNodes[i];
      if (currentNode == node)
        return position + offset;
      position += hterm.TextAttributes.nodeWidth(currentNode);
    }
    return -1;
  };
  
  /**
   * Returns the node and offset corresponding to position within line.
   * Supports line overflow.
   *
   * @param {Node} row X-ROW at beginning of line.
   * @param {integer} position Position within line to retrieve node and offset.
   * @return {Array} Two element array containing node and offset respectively.
   **/
  hterm.Screen.prototype.getNodeAndOffsetWithOverflow_ = function(row, position) {
    while (row && position > hterm.TextAttributes.nodeWidth(row)) {
      if (row.hasAttribute('line-overflow') && row.nextSibling) {
        position -= hterm.TextAttributes.nodeWidth(row);
        row = row.nextSibling;
      } else {
        return -1;
      }
    }
    return this.getNodeAndOffsetWithinRow_(row, position);
  };
  
  /**
   * Returns the node and offset corresponding to position within row.
   * Does not support line overflow.
   *
   * @param {Node} row X-ROW to get position within.
   * @param {integer} position Position within row to retrieve node and offset.
   * @return {Array} Two element array containing node and offset respectively.
   **/
  hterm.Screen.prototype.getNodeAndOffsetWithinRow_ = function(row, position) {
    for (var i = 0; i < row.childNodes.length; i++) {
      var node = row.childNodes[i];
      var nodeTextWidth = hterm.TextAttributes.nodeWidth(node);
      if (position <= nodeTextWidth) {
        if (node.nodeName === 'SPAN') {
          /** Drill down to node contained by SPAN. **/
          return this.getNodeAndOffsetWithinRow_(node, position);
        } else {
          return [node, position];
        }
      }
      position -= nodeTextWidth;
    }
    return null;
  };
  
  /**
   * Returns the node and offset corresponding to position within line.
   * Supports line overflow.
   *
   * @param {Node} row X-ROW at beginning of line.
   * @param {integer} start Start position of range within line.
   * @param {integer} end End position of range within line.
   * @param {Range} range Range to modify.
   **/
  hterm.Screen.prototype.setRange_ = function(row, start, end, range) {
    var startNodeAndOffset = this.getNodeAndOffsetWithOverflow_(row, start);
    if (startNodeAndOffset == null)
      return;
    var endNodeAndOffset = this.getNodeAndOffsetWithOverflow_(row, end);
    if (endNodeAndOffset == null)
      return;
    range.setStart(startNodeAndOffset[0], startNodeAndOffset[1]);
    range.setEnd(endNodeAndOffset[0], endNodeAndOffset[1]);
  };
  
  /**
   * Expands selection to surround URLs.
   *
   * @param {Selection} selection Selection to expand.
   **/
  hterm.Screen.prototype.expandSelection = function(selection) {
    if (!selection)
      return;
  
    var range = selection.getRangeAt(0);
    if (!range || range.toString().match(/\s/))
      return;
  
    var row = this.getLineStartRow_(this.getXRowAncestor_(range.startContainer));
    if (!row)
      return;
  
    var startPosition = this.getPositionWithOverflow_(row,
                                                      range.startContainer,
                                                      range.startOffset);
    if (startPosition == -1)
      return;
    var endPosition = this.getPositionWithOverflow_(row,
                                                    range.endContainer,
                                                    range.endOffset);
    if (endPosition == -1)
      return;
  
    // Matches can start with '~' or '.', since paths frequently do.
    var leftMatch   = '[^\\s\\[\\](){}<>"\'\\^!@#$%&*,;:`]';
    var rightMatch  = '[^\\s\\[\\](){}<>"\'\\^!@#$%&*,;:~.`]';
    var insideMatch = '[^\\s\\[\\](){}<>"\'\\^]*';
  
    //Move start to the left.
    var rowText = this.getLineText_(row);
    var lineUpToRange = lib.wc.substring(rowText, 0, endPosition);
    var leftRegularExpression = new RegExp(leftMatch + insideMatch + "$");
    var expandedStart = lineUpToRange.search(leftRegularExpression);
    if (expandedStart == -1 || expandedStart > startPosition)
      return;
  
    //Move end to the right.
    var lineFromRange = lib.wc.substring(rowText, startPosition,
                                         lib.wc.strWidth(rowText));
    var rightRegularExpression = new RegExp("^" + insideMatch + rightMatch);
    var found = lineFromRange.match(rightRegularExpression);
    if (!found)
      return;
    var expandedEnd = startPosition + lib.wc.strWidth(found[0]);
    if (expandedEnd == -1 || expandedEnd < endPosition)
      return;
  
    this.setRange_(row, expandedStart, expandedEnd, range);
    selection.addRange(range);
  };
  // SOURCE FILE: hterm/js/hterm_scrollport.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  lib.rtdep('lib.f', 'hterm.PubSub', 'hterm.Size');
  
  /**
   * A 'viewport' view of fixed-height rows with support for selection and
   * copy-to-clipboard.
   *
   * 'Viewport' in this case means that only the visible rows are in the DOM.
   * If the rowProvider has 100,000 rows, but the ScrollPort is only 25 rows
   * tall, then only 25 dom nodes are created.  The ScrollPort will ask the
   * RowProvider to create new visible rows on demand as they are scrolled in
   * to the visible area.
   *
   * This viewport is designed so that select and copy-to-clipboard still works,
   * even when all or part of the selection is scrolled off screen.
   *
   * Note that the X11 mouse clipboard does not work properly when all or part
   * of the selection is off screen.  It would be difficult to fix this without
   * adding significant overhead to pathologically large selection cases.
   *
   * The RowProvider should return rows rooted by the custom tag name 'x-row'.
   * This ensures that we can quickly assign the correct display height
   * to the rows with css.
   *
   * @param {RowProvider} rowProvider An object capable of providing rows as
   *     raw text or row nodes.
   */
  hterm.ScrollPort = function(rowProvider) {
    hterm.PubSub.addBehavior(this);
  
    this.rowProvider_ = rowProvider;
  
    // SWAG the character size until we can measure it.
    this.characterSize = new hterm.Size(10, 10);
  
    // DOM node used for character measurement.
    this.ruler_ = null;
  
    this.selection = new hterm.ScrollPort.Selection(this);
  
    // A map of rowIndex => rowNode for each row that is drawn as part of a
    // pending redraw_() call.  Null if there is no pending redraw_ call.
    this.currentRowNodeCache_ = null;
  
    // A map of rowIndex => rowNode for each row that was drawn as part of the
    // previous redraw_() call.
    this.previousRowNodeCache_ = {};
  
    // Used during scroll events to detect when the underlying cause is a resize.
    this.lastScreenWidth_ = null;
    this.lastScreenHeight_ = null;
  
    // True if the user should be allowed to select text in the terminal.
    // This is disabled when the host requests mouse drag events so that we don't
    // end up with two notions of selection.
    this.selectionEnabled_ = true;
  
    // The last row count returned by the row provider, re-populated during
    // syncScrollHeight().
    this.lastRowCount_ = 0;
  
    // The scroll wheel pixel delta multiplier to increase/descrease
    // the scroll speed of mouse wheel events. See: http://goo.gl/sXelnq
    this.scrollWheelMultiplier_ = 1;
  
    /**
     * True if the last scroll caused the scrollport to show the final row.
     */
    this.isScrolledEnd = true;
  
    // The css rule that we use to control the height of a row.
    this.xrowCssRule_ = null;
  
    /**
     * A guess at the current scrollbar width, fixed in resize().
     */
    this.currentScrollbarWidthPx = 16;
  
    /**
     * Whether the ctrl-v key on the screen should paste.
     */
    this.ctrlVPaste = false;
  
    this.div_ = null;
    this.document_ = null;
  
    // Collection of active timeout handles.
    this.timeouts_ = {};
  
    this.observers_ = {};
  
    this.DEBUG_ = false;
  }
  
  /**
   * Proxy for the native selection object which understands how to walk up the
   * DOM to find the containing row node and sort out which comes first.
   *
   * @param {hterm.ScrollPort} scrollPort The parent hterm.ScrollPort instance.
   */
  hterm.ScrollPort.Selection = function(scrollPort) {
    this.scrollPort_ = scrollPort;
  
    /**
     * The row containing the start of the selection.
     *
     * This may be partially or fully selected.  It may be the selection anchor
     * or the focus, but its rowIndex is guaranteed to be less-than-or-equal-to
     * that of the endRow.
     *
     * If only one row is selected then startRow == endRow.  If there is no
     * selection or the selection is collapsed then startRow == null.
     */
    this.startRow = null;
  
    /**
     * The row containing the end of the selection.
     *
     * This may be partially or fully selected.  It may be the selection anchor
     * or the focus, but its rowIndex is guaranteed to be greater-than-or-equal-to
     * that of the startRow.
     *
     * If only one row is selected then startRow == endRow.  If there is no
     * selection or the selection is collapsed then startRow == null.
     */
    this.endRow = null;
  
    /**
     * True if startRow != endRow.
     */
    this.isMultiline = null;
  
    /**
     * True if the selection is just a point rather than a range.
     */
    this.isCollapsed = null;
  };
  
  /**
   * Given a list of DOM nodes and a container, return the DOM node that
   * is first according to a depth-first search.
   *
   * Returns null if none of the children are found.
   */
  hterm.ScrollPort.Selection.prototype.findFirstChild = function(
      parent, childAry) {
    var node = parent.firstChild;
  
    while (node) {
      if (childAry.indexOf(node) != -1)
        return node;
  
      if (node.childNodes.length) {
        var rv = this.findFirstChild(node, childAry);
        if (rv)
          return rv;
      }
  
      node = node.nextSibling;
    }
  
    return null;
  };
  
  /**
   * Synchronize this object with the current DOM selection.
   *
   * This is a one-way synchronization, the DOM selection is copied to this
   * object, not the other way around.
   */
  hterm.ScrollPort.Selection.prototype.sync = function() {
    var self = this;
  
    // The dom selection object has no way to tell which nodes come first in
    // the document, so we have to figure that out.
    //
    // This function is used when we detect that the "anchor" node is first.
    function anchorFirst() {
      self.startRow = anchorRow;
      self.startNode = selection.anchorNode;
      self.startOffset = selection.anchorOffset;
      self.endRow = focusRow;
      self.endNode = selection.focusNode;
      self.endOffset = selection.focusOffset;
    }
  
    // This function is used when we detect that the "focus" node is first.
    function focusFirst() {
      self.startRow = focusRow;
      self.startNode = selection.focusNode;
      self.startOffset = selection.focusOffset;
      self.endRow = anchorRow;
      self.endNode = selection.anchorNode;
      self.endOffset = selection.anchorOffset;
    }
  
    var selection = this.scrollPort_.getDocument().getSelection();
  
    this.startRow = null;
    this.endRow = null;
    this.isMultiline = null;
    this.isCollapsed = !selection || selection.isCollapsed;
  
    if (this.isCollapsed)
      return;
  
    var anchorRow = selection.anchorNode;
    while (anchorRow && !('rowIndex' in anchorRow)) {
      anchorRow = anchorRow.parentNode;
    }
  
    if (!anchorRow) {
      console.error('Selection anchor is not rooted in a row node: ' +
                    selection.anchorNode.nodeName);
      return;
    }
  
    var focusRow = selection.focusNode;
    while (focusRow && !('rowIndex' in focusRow)) {
      focusRow = focusRow.parentNode;
    }
  
    if (!focusRow) {
      console.error('Selection focus is not rooted in a row node: ' +
                    selection.focusNode.nodeName);
      return;
    }
  
    if (anchorRow.rowIndex < focusRow.rowIndex) {
      anchorFirst();
  
    } else if (anchorRow.rowIndex > focusRow.rowIndex) {
      focusFirst();
  
    } else if (selection.focusNode == selection.anchorNode) {
      if (selection.anchorOffset < selection.focusOffset) {
        anchorFirst();
      } else {
        focusFirst();
      }
  
    } else {
      // The selection starts and ends in the same row, but isn't contained all
      // in a single node.
      var firstNode = this.findFirstChild(
          anchorRow, [selection.anchorNode, selection.focusNode]);
  
      if (!firstNode)
        throw new Error('Unexpected error syncing selection.');
  
      if (firstNode == selection.anchorNode) {
        anchorFirst();
      } else {
        focusFirst();
      }
    }
  
    this.isMultiline = anchorRow.rowIndex != focusRow.rowIndex;
  };
  
  
  /**
   * Turn a div into this hterm.ScrollPort.
   */
  hterm.ScrollPort.prototype.decorate = function(div) {
    this.div_ = div;
  
    this.iframe_ = div.ownerDocument.createElement('iframe');
    this.iframe_.style.cssText = (
        'border: 0;' +
        'height: 100%;' +
        'position: absolute;' +
        'width: 100%');
  
    // Set the iframe src to # in FF.  Otherwise when the frame's
    // load event fires in FF it clears out the content of the iframe.
    if ('mozInnerScreenX' in window)  // detect a FF only property
      this.iframe_.src = '#';
  
    div.appendChild(this.iframe_);
  
    this.iframe_.contentWindow.addEventListener('resize',
                                                this.onResize_.bind(this));
  
    var doc = this.document_ = this.iframe_.contentDocument;
    doc.body.style.cssText = (
        'margin: 0px;' +
        'padding: 0px;' +
        'height: 100%;' +
        'width: 100%;' +
        'overflow: hidden;' +
        'cursor: text;' +
        '-webkit-user-select: none;' +
        '-moz-user-select: none;');
  
    var style = doc.createElement('style');
    style.textContent = 'x-row {}';
    doc.head.appendChild(style);
  
    this.xrowCssRule_ = doc.styleSheets[0].cssRules[0];
    this.xrowCssRule_.style.display = 'block';
  
    this.userCssLink_ = doc.createElement('link');
    this.userCssLink_.setAttribute('rel', 'stylesheet');
  
    // TODO(rginda): Sorry, this 'screen_' isn't the same thing as hterm.Screen
    // from screen.js.  I need to pick a better name for one of them to avoid
    // the collision.
    this.screen_ = doc.createElement('x-screen');
    this.screen_.setAttribute('role', 'textbox');
    this.screen_.setAttribute('tabindex', '-1');
    this.screen_.style.cssText = (
        'display: block;' +
        'font-family: monospace;' +
        'font-size: 15px;' +
        'height: 100%;' +
        'overflow-y: scroll; overflow-x: hidden;' +
        'white-space: pre;' +
        'width: 100%;' +
        'outline: none !important');
  
    doc.body.appendChild(this.screen_);
  
    this.screen_.addEventListener('scroll', this.onScroll_.bind(this));
    this.screen_.addEventListener('mousewheel', this.onScrollWheel_.bind(this));
    this.screen_.addEventListener(
        'DOMMouseScroll', this.onScrollWheel_.bind(this));
    this.screen_.addEventListener('copy', this.onCopy_.bind(this));
    this.screen_.addEventListener('paste', this.onPaste_.bind(this));
  
    doc.body.addEventListener('keydown', this.onBodyKeyDown_.bind(this));
  
    // This is the main container for the fixed rows.
    this.rowNodes_ = doc.createElement('div');
    this.rowNodes_.style.cssText = (
        'display: block;' +
        'position: fixed;' +
        'overflow: hidden;' +
        '-webkit-user-select: text;' +
        '-moz-user-select: text;');
    this.screen_.appendChild(this.rowNodes_);
  
    // Two nodes to hold offscreen text during the copy event.
    this.topSelectBag_ = doc.createElement('x-select-bag');
    this.topSelectBag_.style.cssText = (
        'display: block;' +
        'overflow: hidden;' +
        'white-space: pre;');
  
    this.bottomSelectBag_ = this.topSelectBag_.cloneNode();
  
    // Nodes above the top fold and below the bottom fold are hidden.  They are
    // only used to hold rows that are part of the selection but are currently
    // scrolled off the top or bottom of the visible range.
    this.topFold_ = doc.createElement('x-fold');
    this.topFold_.style.cssText = 'display: block;';
    this.rowNodes_.appendChild(this.topFold_);
  
    this.bottomFold_ = this.topFold_.cloneNode();
    this.rowNodes_.appendChild(this.bottomFold_);
  
    // This hidden div accounts for the vertical space that would be consumed by
    // all the rows in the buffer if they were visible.  It's what causes the
    // scrollbar to appear on the 'x-screen', and it moves within the screen when
    // the scrollbar is moved.
    //
    // It is set 'visibility: hidden' to keep the browser from trying to include
    // it in the selection when a user 'drag selects' upwards (drag the mouse to
    // select and scroll at the same time).  Without this, the selection gets
    // out of whack.
    this.scrollArea_ = doc.createElement('div');
    this.scrollArea_.style.cssText = 'visibility: hidden';
    this.screen_.appendChild(this.scrollArea_);
  
    // This svg element is used to detect when the browser is zoomed.  It must be
    // placed in the outermost document for currentScale to be correct.
    // TODO(rginda): This means that hterm nested in an iframe will not correctly
    // detect browser zoom level.  We should come up with a better solution.
    this.svg_ = this.div_.ownerDocument.createElementNS(
        'http://www.w3.org/2000/svg', 'svg');
    this.svg_.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
    this.svg_.setAttribute('version', '1.1');
    this.svg_.style.cssText = (
        'position: absolute;' +
        'top: 0;' +
        'left: 0;' +
        'visibility: hidden');
  
  
    // We send focus to this element just before a paste happens, so we can
    // capture the pasted text and forward it on to someone who cares.
    this.pasteTarget_ = doc.createElement('textarea');
    this.pasteTarget_.setAttribute('tabindex', '-1');
    this.pasteTarget_.style.cssText = (
      'position: absolute;' +
      'height: 1px;' +
      'width: 1px;' +
      'left: 0px; ' +
      'bottom: 0px;' +
      'opacity: 0');
    this.pasteTarget_.contentEditable = true;
  
    this.screen_.appendChild(this.pasteTarget_);
    this.pasteTarget_.addEventListener(
        'textInput', this.handlePasteTargetTextInput_.bind(this));
  
    this.resize();
  };
  
  /**
   * Select the font-family and font-smoothing for this scrollport.
   *
   * @param {string} fontFamily Value of the CSS 'font-family' to use for this
   *     scrollport.  Should be a monospace font.
   * @param {string} opt_smoothing Optional value for '-webkit-font-smoothing'.
   *     Defaults to an empty string if not specified.
   */
  hterm.ScrollPort.prototype.setFontFamily = function(fontFamily, opt_smoothing) {
    this.screen_.style.fontFamily = fontFamily;
    if (opt_smoothing) {
      this.screen_.style.webkitFontSmoothing = opt_smoothing;
    } else {
      this.screen_.style.webkitFontSmoothing = '';
    }
  
    this.syncCharacterSize();
  };
  
  hterm.ScrollPort.prototype.getFontFamily = function() {
    return this.screen_.style.fontFamily;
  };
  
  /**
   * Set a custom stylesheet to include in the scrollport.
   *
   * Defaults to null, meaning no custom css is loaded.  Set it back to null or
   * the empty string to remove a previously applied custom css.
   */
  hterm.ScrollPort.prototype.setUserCss = function(url) {
    if (url) {
      this.userCssLink_.setAttribute('href', url);
  
      if (!this.userCssLink_.parentNode)
        this.document_.head.appendChild(this.userCssLink_);
    } else if (this.userCssLink_.parentNode) {
      this.document_.head.removeChild(this.userCssLink_);
    }
  };
  
  hterm.ScrollPort.prototype.focus = function() {
    this.iframe_.focus();
    this.screen_.focus();
  };
  
  hterm.ScrollPort.prototype.getForegroundColor = function() {
    return this.screen_.style.color;
  };
  
  hterm.ScrollPort.prototype.setForegroundColor = function(color) {
    this.screen_.style.color = color;
  };
  
  hterm.ScrollPort.prototype.getBackgroundColor = function() {
    return this.screen_.style.backgroundColor;
  };
  
  hterm.ScrollPort.prototype.setBackgroundColor = function(color) {
    this.screen_.style.backgroundColor = color;
  };
  
  hterm.ScrollPort.prototype.setBackgroundImage = function(image) {
    this.screen_.style.backgroundImage = image;
  };
  
  hterm.ScrollPort.prototype.setBackgroundSize = function(size) {
    this.screen_.style.backgroundSize = size;
  };
  
  hterm.ScrollPort.prototype.setBackgroundPosition = function(position) {
    this.screen_.style.backgroundPosition = position;
  };
  
  hterm.ScrollPort.prototype.setCtrlVPaste = function(ctrlVPaste) {
    this.ctrlVPaste = ctrlVPaste;
  };
  
  /**
   * Get the usable size of the scrollport screen.
   *
   * The width will not include the scrollbar width.
   */
  hterm.ScrollPort.prototype.getScreenSize = function() {
    var size = hterm.getClientSize(this.screen_);
    return {
      height: size.height,
      width: size.width - this.currentScrollbarWidthPx
    };
  };
  
  /**
   * Get the usable width of the scrollport screen.
   *
   * This the widget width minus scrollbar width.
   */
  hterm.ScrollPort.prototype.getScreenWidth = function() {
    return this.getScreenSize().width ;
  };
  
  /**
   * Get the usable height of the scrollport screen.
   */
  hterm.ScrollPort.prototype.getScreenHeight = function() {
    return this.getScreenSize().height;
  };
  
  /**
   * Return the document that holds the visible rows of this hterm.ScrollPort.
   */
  hterm.ScrollPort.prototype.getDocument = function() {
    return this.document_;
  };
  
  /**
   * Returns the x-screen element that holds the rows of this hterm.ScrollPort.
   */
  hterm.ScrollPort.prototype.getScreenNode = function() {
    return this.screen_;
  };
  
  /**
   * Clear out any cached rowNodes.
   */
  hterm.ScrollPort.prototype.resetCache = function() {
    this.currentRowNodeCache_ = null;
    this.previousRowNodeCache_ = {};
  };
  
  /**
   * Change the current rowProvider.
   *
   * This will clear the row cache and cause a redraw.
   *
   * @param {Object} rowProvider An object capable of providing the rows
   *     in this hterm.ScrollPort.
   */
  hterm.ScrollPort.prototype.setRowProvider = function(rowProvider) {
    this.resetCache();
    this.rowProvider_ = rowProvider;
    this.scheduleRedraw();
  };
  
  /**
   * Inform the ScrollPort that the root DOM nodes for some or all of the visible
   * rows are no longer valid.
   *
   * Specifically, this should be called if this.rowProvider_.getRowNode() now
   * returns an entirely different node than it did before.  It does not
   * need to be called if the content of a row node is the only thing that
   * changed.
   *
   * This skips some of the overhead of a full redraw, but should not be used
   * in cases where the scrollport has been scrolled, or when the row count has
   * changed.
   */
  hterm.ScrollPort.prototype.invalidate = function() {
    var node = this.topFold_.nextSibling;
    while (node != this.bottomFold_) {
      var nextSibling = node.nextSibling;
      node.parentElement.removeChild(node);
      node = nextSibling;
    }
  
    this.previousRowNodeCache_ = null;
    var topRowIndex = this.getTopRowIndex();
    var bottomRowIndex = this.getBottomRowIndex(topRowIndex);
  
    this.drawVisibleRows_(topRowIndex, bottomRowIndex);
  };
  
  hterm.ScrollPort.prototype.scheduleInvalidate = function() {
    if (this.timeouts_.invalidate)
      return;
  
    var self = this;
    this.timeouts_.invalidate = setTimeout(function () {
        delete self.timeouts_.invalidate;
        self.invalidate();
      }, 0);
  };
  
  /**
   * Set the font size of the ScrollPort.
   */
  hterm.ScrollPort.prototype.setFontSize = function(px) {
    this.screen_.style.fontSize = px + 'px';
    this.syncCharacterSize();
  };
  
  /**
   * Return the current font size of the ScrollPort.
   */
  hterm.ScrollPort.prototype.getFontSize = function() {
    return parseInt(this.screen_.style.fontSize);
  };
  
  /**
   * Measure the size of a single character in pixels.
   *
   * @param {string} opt_weight The font weight to measure, or 'normal' if
   *     omitted.
   * @return {hterm.Size} A new hterm.Size object.
   */
  hterm.ScrollPort.prototype.measureCharacterSize = function(opt_weight) {
    if (!this.ruler_) {
      this.ruler_ = this.document_.createElement('div');
      this.ruler_.style.cssText = (
          'position: absolute;' +
          'top: 0;' +
          'left: 0;' +
          'visibility: hidden;' +
          'height: auto !important;' +
          'width: auto !important;');
  
      // We need to put the text in a span to make the size calculation
      // work properly in Firefox
      this.rulerSpan_ = this.document_.createElement('span');
      this.rulerSpan_.textContent = ('XXXXXXXXXXXXXXXXXXXX' +
                                     'XXXXXXXXXXXXXXXXXXXX' +
                                     'XXXXXXXXXXXXXXXXXXXX' +
                                     'XXXXXXXXXXXXXXXXXXXX' +
                                     'XXXXXXXXXXXXXXXXXXXX');
      this.ruler_.appendChild(this.rulerSpan_);
  
      this.rulerBaseline_ = this.document_.createElement('span');
      // We want to collapse it on the baseline
      this.rulerBaseline_.style.fontSize = '0px';
      this.rulerBaseline_.textContent = 'X';
    }
  
    this.rulerSpan_.style.fontWeight = opt_weight || '';
  
    this.rowNodes_.appendChild(this.ruler_);
    var rulerSize = hterm.getClientSize(this.rulerSpan_);
  
    var size = new hterm.Size(rulerSize.width / this.ruler_.textContent.length,
                              rulerSize.height);
  
    this.ruler_.appendChild(this.rulerBaseline_);
    size.baseline = this.rulerBaseline_.offsetTop;
    this.ruler_.removeChild(this.rulerBaseline_);
  
    this.rowNodes_.removeChild(this.ruler_);
  
    this.div_.ownerDocument.body.appendChild(this.svg_);
    size.zoomFactor = this.svg_.currentScale;
    this.div_.ownerDocument.body.removeChild(this.svg_);
  
    return size;
  };
  
  /**
   * Synchronize the character size.
   *
   * This will re-measure the current character size and adjust the height
   * of an x-row to match.
   */
  hterm.ScrollPort.prototype.syncCharacterSize = function() {
    this.characterSize = this.measureCharacterSize();
  
    var lineHeight = this.characterSize.height + 'px';
    this.xrowCssRule_.style.height = lineHeight;
    this.topSelectBag_.style.height = lineHeight;
    this.bottomSelectBag_.style.height = lineHeight;
  
    this.resize();
  
    if (this.DEBUG_) {
      // When we're debugging we add padding to the body so that the offscreen
      // elements are visible.
      this.document_.body.style.paddingTop =
          this.document_.body.style.paddingBottom =
          3 * this.characterSize.height + 'px';
    }
  };
  
  /**
   * Reset dimensions and visible row count to account for a change in the
   * dimensions of the 'x-screen'.
   */
  hterm.ScrollPort.prototype.resize = function() {
    this.currentScrollbarWidthPx = hterm.getClientWidth(this.screen_) -
      this.screen_.clientWidth;
  
    this.syncScrollHeight();
    this.syncRowNodesDimensions_();
  
    var self = this;
    this.publish(
        'resize', { scrollPort: this },
        function() {
          self.scrollRowToBottom(self.rowProvider_.getRowCount());
          self.scheduleRedraw();
        });
  };
  
  /**
   * Set the position and size of the row nodes element.
   */
  hterm.ScrollPort.prototype.syncRowNodesDimensions_ = function() {
    var screenSize = this.getScreenSize();
    this.lastScreenWidth_ = screenSize.width;
    this.lastScreenHeight_ = screenSize.height;
  
    // We don't want to show a partial row because it would be distracting
    // in a terminal, so we floor any fractional row count.
    this.visibleRowCount = lib.f.smartFloorDivide(
        screenSize.height, this.characterSize.height);
  
    // Then compute the height of our integral number of rows.
    var visibleRowsHeight = this.visibleRowCount * this.characterSize.height;
  
    // Then the difference between the screen height and total row height needs to
    // be made up for as top margin.  We need to record this value so it
    // can be used later to determine the topRowIndex.
    this.visibleRowTopMargin = 0;
    this.visibleRowBottomMargin = screenSize.height - visibleRowsHeight;
  
    this.topFold_.style.marginBottom = this.visibleRowTopMargin + 'px';
  
  
    var topFoldOffset = 0;
    var node = this.topFold_.previousSibling;
    while (node) {
      topFoldOffset += hterm.getClientHeight(node);
      node = node.previousSibling;
    }
  
    // Set the dimensions of the visible rows container.
    this.rowNodes_.style.width = screenSize.width + 'px';
    this.rowNodes_.style.height = visibleRowsHeight + topFoldOffset + 'px';
    this.rowNodes_.style.left = this.screen_.offsetLeft + 'px';
    this.rowNodes_.style.top = this.screen_.offsetTop - topFoldOffset + 'px';
  };
  
  hterm.ScrollPort.prototype.syncScrollHeight = function() {
    // Resize the scroll area to appear as though it contains every row.
    this.lastRowCount_ = this.rowProvider_.getRowCount();
    this.scrollArea_.style.height = (this.characterSize.height *
                                     this.lastRowCount_ +
                                     this.visibleRowTopMargin +
                                     this.visibleRowBottomMargin +
                                     'px');
  };
  
  /**
   * Schedule a redraw to happen asynchronously.
   *
   * If this method is called multiple times before the redraw has a chance to
   * run only one redraw occurs.
   */
  hterm.ScrollPort.prototype.scheduleRedraw = function() {
    if (this.timeouts_.redraw)
      return;
  
    var self = this;
    this.timeouts_.redraw = setTimeout(function () {
        delete self.timeouts_.redraw;
        self.redraw_();
      }, 0);
  };
  
  /**
   * Redraw the current hterm.ScrollPort based on the current scrollbar position.
   *
   * When redrawing, we are careful to make sure that the rows that start or end
   * the current selection are not touched in any way.  Doing so would disturb
   * the selection, and cleaning up after that would cause flashes at best and
   * incorrect selection at worst.  Instead, we modify the DOM around these nodes.
   * We even stash the selection start/end outside of the visible area if
   * they are not supposed to be visible in the hterm.ScrollPort.
   */
  hterm.ScrollPort.prototype.redraw_ = function() {
    this.resetSelectBags_();
    this.selection.sync();
  
    this.syncScrollHeight();
  
    this.currentRowNodeCache_ = {};
  
    var topRowIndex = this.getTopRowIndex();
    var bottomRowIndex = this.getBottomRowIndex(topRowIndex);
  
    this.drawTopFold_(topRowIndex);
    this.drawBottomFold_(bottomRowIndex);
    this.drawVisibleRows_(topRowIndex, bottomRowIndex);
  
    this.syncRowNodesDimensions_();
  
    this.previousRowNodeCache_ = this.currentRowNodeCache_;
    this.currentRowNodeCache_ = null;
  
    this.isScrolledEnd = (
      this.getTopRowIndex() + this.visibleRowCount >= this.lastRowCount_);
  };
  
  /**
   * Ensure that the nodes above the top fold are as they should be.
   *
   * If the selection start and/or end nodes are above the visible range
   * of this hterm.ScrollPort then the dom will be adjusted so that they appear
   * before the top fold (the first x-fold element, aka this.topFold).
   *
   * If not, the top fold will be the first element.
   *
   * It is critical that this method does not move the selection nodes.  Doing
   * so would clear the current selection.  Instead, the rest of the DOM is
   * adjusted around them.
   */
  hterm.ScrollPort.prototype.drawTopFold_ = function(topRowIndex) {
    if (!this.selection.startRow ||
        this.selection.startRow.rowIndex >= topRowIndex) {
      // Selection is entirely below the top fold, just make sure the fold is
      // the first child.
      if (this.rowNodes_.firstChild != this.topFold_)
        this.rowNodes_.insertBefore(this.topFold_, this.rowNodes_.firstChild);
  
      return;
    }
  
    if (!this.selection.isMultiline ||
        this.selection.endRow.rowIndex >= topRowIndex) {
      // Only the startRow is above the fold.
      if (this.selection.startRow.nextSibling != this.topFold_)
        this.rowNodes_.insertBefore(this.topFold_,
                                    this.selection.startRow.nextSibling);
    } else {
      // Both rows are above the fold.
      if (this.selection.endRow.nextSibling != this.topFold_) {
        this.rowNodes_.insertBefore(this.topFold_,
                                    this.selection.endRow.nextSibling);
      }
  
      // Trim any intermediate lines.
      while (this.selection.startRow.nextSibling !=
             this.selection.endRow) {
        this.rowNodes_.removeChild(this.selection.startRow.nextSibling);
      }
    }
  
    while(this.rowNodes_.firstChild != this.selection.startRow) {
      this.rowNodes_.removeChild(this.rowNodes_.firstChild);
    }
  };
  
  /**
   * Ensure that the nodes below the bottom fold are as they should be.
   *
   * If the selection start and/or end nodes are below the visible range
   * of this hterm.ScrollPort then the dom will be adjusted so that they appear
   * after the bottom fold (the second x-fold element, aka this.bottomFold).
   *
   * If not, the bottom fold will be the last element.
   *
   * It is critical that this method does not move the selection nodes.  Doing
   * so would clear the current selection.  Instead, the rest of the DOM is
   * adjusted around them.
   */
  hterm.ScrollPort.prototype.drawBottomFold_ = function(bottomRowIndex) {
    if (!this.selection.endRow ||
        this.selection.endRow.rowIndex <= bottomRowIndex) {
      // Selection is entirely above the bottom fold, just make sure the fold is
      // the last child.
      if (this.rowNodes_.lastChild != this.bottomFold_)
        this.rowNodes_.appendChild(this.bottomFold_);
  
      return;
    }
  
    if (!this.selection.isMultiline ||
        this.selection.startRow.rowIndex <= bottomRowIndex) {
      // Only the endRow is below the fold.
      if (this.bottomFold_.nextSibling != this.selection.endRow)
        this.rowNodes_.insertBefore(this.bottomFold_,
                                    this.selection.endRow);
    } else {
      // Both rows are below the fold.
      if (this.bottomFold_.nextSibling != this.selection.startRow) {
        this.rowNodes_.insertBefore(this.bottomFold_,
                                    this.selection.startRow);
      }
  
      // Trim any intermediate lines.
      while (this.selection.startRow.nextSibling !=
             this.selection.endRow) {
        this.rowNodes_.removeChild(this.selection.startRow.nextSibling);
      }
    }
  
    while(this.rowNodes_.lastChild != this.selection.endRow) {
      this.rowNodes_.removeChild(this.rowNodes_.lastChild);
    }
  };
  
  /**
   * Ensure that the rows between the top and bottom folds are as they should be.
   *
   * This method assumes that drawTopFold_() and drawBottomFold_() have already
   * run, and that they have left any visible selection row (selection start
   * or selection end) between the folds.
   *
   * It recycles DOM nodes from the previous redraw where possible, but will ask
   * the rowSource to make new nodes if necessary.
   *
   * It is critical that this method does not move the selection nodes.  Doing
   * so would clear the current selection.  Instead, the rest of the DOM is
   * adjusted around them.
   */
  hterm.ScrollPort.prototype.drawVisibleRows_ = function(
      topRowIndex, bottomRowIndex) {
    var self = this;
  
    // Keep removing nodes, starting with currentNode, until we encounter
    // targetNode.  Throws on failure.
    function removeUntilNode(currentNode, targetNode) {
      while (currentNode != targetNode) {
        if (!currentNode)
          throw 'Did not encounter target node';
  
        if (currentNode == self.bottomFold_)
          throw 'Encountered bottom fold before target node';
  
        var deadNode = currentNode;
        currentNode = currentNode.nextSibling;
        deadNode.parentNode.removeChild(deadNode);
      }
    }
  
    // Shorthand for things we're going to use a lot.
    var selectionStartRow = this.selection.startRow;
    var selectionEndRow = this.selection.endRow;
    var bottomFold = this.bottomFold_;
  
    // The node we're examining during the current iteration.
    var node = this.topFold_.nextSibling;
  
    var targetDrawCount = Math.min(this.visibleRowCount,
                                   this.rowProvider_.getRowCount());
  
    for (var drawCount = 0; drawCount < targetDrawCount; drawCount++) {
      var rowIndex = topRowIndex + drawCount;
  
      if (node == bottomFold) {
        // We've hit the bottom fold, we need to insert a new row.
        var newNode = this.fetchRowNode_(rowIndex);
        if (!newNode) {
          console.log("Couldn't fetch row index: " + rowIndex);
          break;
        }
  
        this.rowNodes_.insertBefore(newNode, node);
        continue;
      }
  
      if (node.rowIndex == rowIndex) {
        // This node is in the right place, move along.
        node = node.nextSibling;
        continue;
      }
  
      if (selectionStartRow && selectionStartRow.rowIndex == rowIndex) {
        // The selection start row is supposed to be here, remove nodes until
        // we find it.
        removeUntilNode(node, selectionStartRow);
        node = selectionStartRow.nextSibling;
        continue;
      }
  
      if (selectionEndRow && selectionEndRow.rowIndex == rowIndex) {
        // The selection end row is supposed to be here, remove nodes until
        // we find it.
        removeUntilNode(node, selectionEndRow);
        node = selectionEndRow.nextSibling;
        continue;
      }
  
      if (node == selectionStartRow || node == selectionEndRow) {
        // We encountered the start/end of the selection, but we don't want it
        // yet.  Insert a new row instead.
        var newNode = this.fetchRowNode_(rowIndex);
        if (!newNode) {
          console.log("Couldn't fetch row index: " + rowIndex);
          break;
        }
  
        this.rowNodes_.insertBefore(newNode, node);
        continue;
      }
  
      // There is nothing special about this node, but it's in our way.  Replace
      // it with the node that should be here.
      var newNode = this.fetchRowNode_(rowIndex);
      if (!newNode) {
        console.log("Couldn't fetch row index: " + rowIndex);
        break;
      }
  
      if (node == newNode) {
        node = node.nextSibling;
        continue;
      }
  
      this.rowNodes_.insertBefore(newNode, node);
      if (!newNode.nextSibling)
        debugger;
      this.rowNodes_.removeChild(node);
      node = newNode.nextSibling;
    }
  
    if (node != this.bottomFold_)
      removeUntilNode(node, bottomFold);
  };
  
  /**
   * Empty out both select bags and remove them from the document.
   *
   * These nodes hold the text between the start and end of the selection
   * when that text is otherwise off screen.  They are filled out in the
   * onCopy_ event.
   */
  hterm.ScrollPort.prototype.resetSelectBags_ = function() {
    if (this.topSelectBag_.parentNode) {
      this.topSelectBag_.textContent = '';
      this.topSelectBag_.parentNode.removeChild(this.topSelectBag_);
    }
  
    if (this.bottomSelectBag_.parentNode) {
      this.bottomSelectBag_.textContent = '';
      this.bottomSelectBag_.parentNode.removeChild(this.bottomSelectBag_);
    }
  };
  
  /**
   * Place a row node in the cache of visible nodes.
   *
   * This method may only be used during a redraw_.
   */
  hterm.ScrollPort.prototype.cacheRowNode_ = function(rowNode) {
    this.currentRowNodeCache_[rowNode.rowIndex] = rowNode;
  };
  
  /**
   * Fetch the row node for the given index.
   *
   * This will return a node from the cache if possible, or will request one
   * from the RowProvider if not.
   *
   * If a redraw_ is in progress the row will be added to the current cache.
   */
  hterm.ScrollPort.prototype.fetchRowNode_ = function(rowIndex) {
    var node;
  
    if (this.previousRowNodeCache_ && rowIndex in this.previousRowNodeCache_) {
      node = this.previousRowNodeCache_[rowIndex];
    } else {
      node = this.rowProvider_.getRowNode(rowIndex);
    }
  
    if (this.currentRowNodeCache_)
      this.cacheRowNode_(node);
  
    return node;
  };
  
  /**
   * Select all rows in the viewport.
   */
  hterm.ScrollPort.prototype.selectAll = function() {
    var firstRow;
  
    if (this.topFold_.nextSibling.rowIndex != 0) {
      while (this.topFold_.previousSibling) {
        this.rowNodes_.removeChild(this.topFold_.previousSibling);
      }
  
      firstRow = this.fetchRowNode_(0);
      this.rowNodes_.insertBefore(firstRow, this.topFold_);
      this.syncRowNodesDimensions_();
    } else {
      firstRow = this.topFold_.nextSibling;
    }
  
    var lastRowIndex = this.rowProvider_.getRowCount() - 1;
    var lastRow;
  
    if (this.bottomFold_.previousSibling.rowIndex != lastRowIndex) {
      while (this.bottomFold_.nextSibling) {
        this.rowNodes_.removeChild(this.bottomFold_.nextSibling);
      }
  
      lastRow = this.fetchRowNode_(lastRowIndex);
      this.rowNodes_.appendChild(lastRow);
    } else {
      lastRow = this.bottomFold_.previousSibling.rowIndex;
    }
  
    var selection = this.document_.getSelection();
    selection.collapse(firstRow, 0);
    selection.extend(lastRow, lastRow.childNodes.length);
  
    this.selection.sync();
  };
  
  /**
   * Return the maximum scroll position in pixels.
   */
  hterm.ScrollPort.prototype.getScrollMax_ = function(e) {
    return (hterm.getClientHeight(this.scrollArea_) +
            this.visibleRowTopMargin + this.visibleRowBottomMargin -
            hterm.getClientHeight(this.screen_));
  };
  
  /**
   * Scroll the given rowIndex to the top of the hterm.ScrollPort.
   *
   * @param {integer} rowIndex Index of the target row.
   */
  hterm.ScrollPort.prototype.scrollRowToTop = function(rowIndex) {
    this.syncScrollHeight();
  
    this.isScrolledEnd = (
      rowIndex + this.visibleRowCount >= this.lastRowCount_);
  
    var scrollTop = rowIndex * this.characterSize.height +
        this.visibleRowTopMargin;
  
    var scrollMax = this.getScrollMax_();
    if (scrollTop > scrollMax)
      scrollTop = scrollMax;
  
    if (this.screen_.scrollTop == scrollTop)
      return;
  
    this.screen_.scrollTop = scrollTop;
    this.scheduleRedraw();
  };
  
  /**
   * Scroll the given rowIndex to the bottom of the hterm.ScrollPort.
   *
   * @param {integer} rowIndex Index of the target row.
   */
  hterm.ScrollPort.prototype.scrollRowToBottom = function(rowIndex) {
    this.syncScrollHeight();
  
    this.isScrolledEnd = (
      rowIndex + this.visibleRowCount >= this.lastRowCount_);
  
    var scrollTop = rowIndex * this.characterSize.height +
        this.visibleRowTopMargin + this.visibleRowBottomMargin;
    scrollTop -= this.visibleRowCount * this.characterSize.height;
  
    if (scrollTop < 0)
      scrollTop = 0;
  
    if (this.screen_.scrollTop == scrollTop)
      return;
  
    this.screen_.scrollTop = scrollTop;
  };
  
  /**
   * Return the row index of the first visible row.
   *
   * This is based on the scroll position.  If a redraw_ is in progress this
   * returns the row that *should* be at the top.
   */
  hterm.ScrollPort.prototype.getTopRowIndex = function() {
    return lib.f.smartFloorDivide(
        this.screen_.scrollTop, this.characterSize.height);
  };
  
  /**
   * Return the row index of the last visible row.
   *
   * This is based on the scroll position.  If a redraw_ is in progress this
   * returns the row that *should* be at the bottom.
   */
  hterm.ScrollPort.prototype.getBottomRowIndex = function(topRowIndex) {
    return topRowIndex + this.visibleRowCount - 1;
  };
  
  /**
   * Handler for scroll events.
   *
   * The onScroll event fires when scrollArea's scrollTop property changes.  This
   * may be due to the user manually move the scrollbar, or a programmatic change.
   */
  hterm.ScrollPort.prototype.onScroll_ = function(e) {
    var screenSize = this.getScreenSize();
    if (screenSize.width != this.lastScreenWidth_ ||
        screenSize.height != this.lastScreenHeight_) {
      // This event may also fire during a resize (but before the resize event!).
      // This happens when the browser moves the scrollbar as part of the resize.
      // In these cases, we want to ignore the scroll event and let onResize
      // handle things.  If we don't, then we end up scrolling to the wrong
      // position after a resize.
      this.resize();
      return;
    }
  
    this.redraw_();
    this.publish('scroll', { scrollPort: this });
  };
  
  /**
   * Clients can override this if they want to hear scrollwheel events.
   *
   * Clients may call event.preventDefault() if they want to keep the scrollport
   * from also handling the events.
   */
  hterm.ScrollPort.prototype.onScrollWheel = function(e) {};
  
  /**
   * Handler for scroll-wheel events.
   *
   * The onScrollWheel event fires when the user moves their scrollwheel over this
   * hterm.ScrollPort.  Because the frontmost element in the hterm.ScrollPort is
   * a fixed position DIV, the scroll wheel does nothing by default.  Instead, we
   * have to handle it manually.
   */
  hterm.ScrollPort.prototype.onScrollWheel_ = function(e) {
    this.onScrollWheel(e);
  
    if (e.defaultPrevented)
      return;
  
    // In FF, the event is DOMMouseScroll and puts the scroll pixel delta in the
    // 'detail' field of the event.  It also flips the mapping of which direction
    // a negative number means in the scroll.
    var delta = e.type == 'DOMMouseScroll' ? (-1 * e.detail) : e.wheelDeltaY;
    delta *= this.scrollWheelMultiplier_;
  
    var top = this.screen_.scrollTop - delta;
    if (top < 0)
      top = 0;
  
    var scrollMax = this.getScrollMax_();
    if (top > scrollMax)
      top = scrollMax;
  
    if (top != this.screen_.scrollTop) {
      // Moving scrollTop causes a scroll event, which triggers the redraw.
      this.screen_.scrollTop = top;
  
      // Only preventDefault when we've actually scrolled.  If there's nothing
      // to scroll we want to pass the event through so Chrome can detect the
      // overscroll.
      e.preventDefault();
    }
  };
  
  /**
   * Handler for resize events.
   *
   * The browser will resize us such that the top row stays at the top, but we
   * prefer to the bottom row to stay at the bottom.
   */
  hterm.ScrollPort.prototype.onResize_ = function(e) {
    // Re-measure, since onResize also happens for browser zoom changes.
    this.syncCharacterSize();
    this.resize();
  };
  
  /**
   * Clients can override this if they want to hear copy events.
   *
   * Clients may call event.preventDefault() if they want to keep the scrollport
   * from also handling the events.
   */
  hterm.ScrollPort.prototype.onCopy = function(e) { };
  
  /**
   * Handler for copy-to-clipboard events.
   *
   * If some or all of the selected rows are off screen we may need to fill in
   * the rows between selection start and selection end.  This handler determines
   * if we're missing some of the selected text, and if so populates one or both
   * of the "select bags" with the missing text.
   */
  hterm.ScrollPort.prototype.onCopy_ = function(e) {
    this.onCopy(e);
  
    if (e.defaultPrevented)
      return;
  
    this.resetSelectBags_();
    this.selection.sync();
  
    if (!this.selection.startRow ||
        this.selection.endRow.rowIndex - this.selection.startRow.rowIndex < 2) {
      return;
    }
  
    var topRowIndex = this.getTopRowIndex();
    var bottomRowIndex = this.getBottomRowIndex(topRowIndex);
  
    if (this.selection.startRow.rowIndex < topRowIndex) {
      // Start of selection is above the top fold.
      var endBackfillIndex;
  
      if (this.selection.endRow.rowIndex < topRowIndex) {
        // Entire selection is above the top fold.
        endBackfillIndex = this.selection.endRow.rowIndex;
      } else {
        // Selection extends below the top fold.
        endBackfillIndex = this.topFold_.nextSibling.rowIndex;
      }
  
      this.topSelectBag_.textContent = this.rowProvider_.getRowsText(
          this.selection.startRow.rowIndex + 1, endBackfillIndex);
      this.rowNodes_.insertBefore(this.topSelectBag_,
                                  this.selection.startRow.nextSibling);
      this.syncRowNodesDimensions_();
    }
  
    if (this.selection.endRow.rowIndex > bottomRowIndex) {
      // Selection ends below the bottom fold.
      var startBackfillIndex;
  
      if (this.selection.startRow.rowIndex > bottomRowIndex) {
        // Entire selection is below the bottom fold.
        startBackfillIndex = this.selection.startRow.rowIndex + 1;
      } else {
        // Selection starts above the bottom fold.
        startBackfillIndex = this.bottomFold_.previousSibling.rowIndex + 1;
      }
  
      this.bottomSelectBag_.textContent = this.rowProvider_.getRowsText(
          startBackfillIndex, this.selection.endRow.rowIndex);
      this.rowNodes_.insertBefore(this.bottomSelectBag_, this.selection.endRow);
    }
  };
  
  /**
   * Focuses on the paste target on a ctrl-v keydown event, as in
   * FF a content editable element must be focused before the paste event.
   */
  hterm.ScrollPort.prototype.onBodyKeyDown_ = function(e) {
    if (!this.ctrlVPaste)
      return;
  
    var key = String.fromCharCode(e.which);
    var lowerKey = key.toLowerCase();
    if ((e.ctrlKey || e.metaKey) && lowerKey == "v")
      this.pasteTarget_.focus();
  };
  
  /**
   * Handle a paste event on the the ScrollPort's screen element.
   */
  hterm.ScrollPort.prototype.onPaste_ = function(e) {
    this.pasteTarget_.focus();
  
    var self = this;
    setTimeout(function() {
        self.publish('paste', { text: self.pasteTarget_.value });
        self.pasteTarget_.value = '';
        self.screen_.focus();
      }, 0);
  };
  
  /**
   * Handles a textInput event on the paste target. Stops this from
   * propagating as we want this to be handled in the onPaste_ method.
   */
  hterm.ScrollPort.prototype.handlePasteTargetTextInput_ = function(e) {
    e.stopPropagation();
  };
  
  /**
   * Set the vertical scrollbar mode of the ScrollPort.
   */
  hterm.ScrollPort.prototype.setScrollbarVisible = function(state) {
    this.screen_.style.overflowY = state ? 'scroll' : 'hidden';
  };
  
  /**
   * Set scroll wheel multiplier. This alters how much the screen scrolls on
   * mouse wheel events.
   */
  hterm.ScrollPort.prototype.setScrollWheelMoveMultipler = function(multiplier) {
    this.scrollWheelMultiplier_ = multiplier;
  };
  // SOURCE FILE: hterm/js/hterm_terminal.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  lib.rtdep('lib.colors', 'lib.PreferenceManager', 'lib.resource', 'lib.wc',
            'lib.f', 'hterm.Keyboard', 'hterm.Options', 'hterm.PreferenceManager',
            'hterm.Screen', 'hterm.ScrollPort', 'hterm.Size',
            'hterm.TextAttributes', 'hterm.VT');
  
  /**
   * Constructor for the Terminal class.
   *
   * A Terminal pulls together the hterm.ScrollPort, hterm.Screen and hterm.VT100
   * classes to provide the complete terminal functionality.
   *
   * There are a number of lower-level Terminal methods that can be called
   * directly to manipulate the cursor, text, scroll region, and other terminal
   * attributes.  However, the primary method is interpret(), which parses VT
   * escape sequences and invokes the appropriate Terminal methods.
   *
   * This class was heavily influenced by Cory Maccarrone's Framebuffer class.
   *
   * TODO(rginda): Eventually we're going to need to support characters which are
   * displayed twice as wide as standard latin characters.  This is to support
   * CJK (and possibly other character sets).
   *
   * @param {string} opt_profileId Optional preference profile name.  If not
   *     provided, defaults to 'default'.
   */
  hterm.Terminal = function(opt_profileId) {
    this.profileId_ = null;
  
    // Two screen instances.
    this.primaryScreen_ = new hterm.Screen();
    this.alternateScreen_ = new hterm.Screen();
  
    // The "current" screen.
    this.screen_ = this.primaryScreen_;
  
    // The local notion of the screen size.  ScreenBuffers also have a size which
    // indicates their present size.  During size changes, the two may disagree.
    // Also, the inactive screen's size is not altered until it is made the active
    // screen.
    this.screenSize = new hterm.Size(0, 0);
  
    // The scroll port we'll be using to display the visible rows.
    this.scrollPort_ = new hterm.ScrollPort(this);
    this.scrollPort_.subscribe('resize', this.onResize_.bind(this));
    this.scrollPort_.subscribe('scroll', this.onScroll_.bind(this));
    this.scrollPort_.subscribe('paste', this.onPaste_.bind(this));
    this.scrollPort_.onCopy = this.onCopy_.bind(this);
  
    // The div that contains this terminal.
    this.div_ = null;
  
    // The document that contains the scrollPort.  Defaulted to the global
    // document here so that the terminal is functional even if it hasn't been
    // inserted into a document yet, but re-set in decorate().
    this.document_ = window.document;
  
    // The rows that have scrolled off screen and are no longer addressable.
    this.scrollbackRows_ = [];
  
    // Saved tab stops.
    this.tabStops_ = [];
  
    // Keep track of whether default tab stops have been erased; after a TBC
    // clears all tab stops, defaults aren't restored on resize until a reset.
    this.defaultTabStops = true;
  
    // The VT's notion of the top and bottom rows.  Used during some VT
    // cursor positioning and scrolling commands.
    this.vtScrollTop_ = null;
    this.vtScrollBottom_ = null;
  
    // The DIV element for the visible cursor.
    this.cursorNode_ = null;
  
    // The current cursor shape of the terminal.
    this.cursorShape_ = hterm.Terminal.cursorShape.BLOCK;
  
    // The current color of the cursor.
    this.cursorColor_ = null;
  
    // Cursor blink on/off cycle in ms, overwritten by prefs once they're loaded.
    this.cursorBlinkCycle_ = [100, 100];
  
    // Pre-bound onCursorBlink_ handler, so we don't have to do this for each
    // cursor on/off servicing.
    this.myOnCursorBlink_ = this.onCursorBlink_.bind(this);
  
    // These prefs are cached so we don't have to read from local storage with
    // each output and keystroke.  They are initialized by the preference manager.
    this.backgroundColor_ = null;
    this.foregroundColor_ = null;
    this.scrollOnOutput_ = null;
    this.scrollOnKeystroke_ = null;
  
    // True if we should override mouse event reporting to allow local selection.
    this.defeatMouseReports_ = false;
  
    // Terminal bell sound.
    this.bellAudio_ = this.document_.createElement('audio');
    this.bellAudio_.setAttribute('preload', 'auto');
  
    // All terminal bell notifications that have been generated (not necessarily
    // shown).
    this.bellNotificationList_ = [];
  
    // Whether we have permission to display notifications.
    this.desktopNotificationBell_ = false;
  
    // Cursor position and attributes saved with DECSC.
    this.savedOptions_ = {};
  
    // The current mode bits for the terminal.
    this.options_ = new hterm.Options();
  
    // Timeouts we might need to clear.
    this.timeouts_ = {};
  
    // The VT escape sequence interpreter.
    this.vt = new hterm.VT(this);
  
    // The keyboard hander.
    this.keyboard = new hterm.Keyboard(this);
  
    // General IO interface that can be given to third parties without exposing
    // the entire terminal object.
    this.io = new hterm.Terminal.IO(this);
  
    // True if mouse-click-drag should scroll the terminal.
    this.enableMouseDragScroll = true;
  
    this.copyOnSelect = null;
    this.mousePasteButton = null;
  
    // Whether to use the default window copy behaviour.
    this.useDefaultWindowCopy = false;
  
    this.clearSelectionAfterCopy = true;
  
    this.realizeSize_(80, 24);
    this.setDefaultTabStops();
  
    this.setProfile(opt_profileId || 'default',
                    function() { this.onTerminalReady() }.bind(this));
  };
  
  /**
   * Possible cursor shapes.
   */
  hterm.Terminal.cursorShape = {
    BLOCK: 'BLOCK',
    BEAM: 'BEAM',
    UNDERLINE: 'UNDERLINE'
  };
  
  /**
   * Clients should override this to be notified when the terminal is ready
   * for use.
   *
   * The terminal initialization is asynchronous, and shouldn't be used before
   * this method is called.
   */
  hterm.Terminal.prototype.onTerminalReady = function() { };
  
  /**
   * Default tab with of 8 to match xterm.
   */
  hterm.Terminal.prototype.tabWidth = 8;
  
  /**
   * Select a preference profile.
   *
   * This will load the terminal preferences for the given profile name and
   * associate subsequent preference changes with the new preference profile.
   *
   * @param {string} newName The name of the preference profile.  Forward slash
   *     characters will be removed from the name.
   * @param {function} opt_callback Optional callback to invoke when the profile
   *     transition is complete.
   */
  hterm.Terminal.prototype.setProfile = function(profileId, opt_callback) {
    this.profileId_ = profileId.replace(/\//g, '');
  
    var terminal = this;
  
    if (this.prefs_)
      this.prefs_.deactivate();
  
    this.prefs_ = new hterm.PreferenceManager(this.profileId_);
    this.prefs_.addObservers(null, {
      'alt-gr-mode': function(v) {
        if (v == null) {
          if (navigator.language.toLowerCase() == 'en-us') {
            v = 'none';
          } else {
            v = 'right-alt';
          }
        } else if (typeof v == 'string') {
          v = v.toLowerCase();
        } else {
          v = 'none';
        }
  
        if (!/^(none|ctrl-alt|left-alt|right-alt)$/.test(v))
          v = 'none';
  
        terminal.keyboard.altGrMode = v;
      },
  
      'alt-backspace-is-meta-backspace': function(v) {
        terminal.keyboard.altBackspaceIsMetaBackspace = v;
      },
  
      'alt-is-meta': function(v) {
        terminal.keyboard.altIsMeta = v;
      },
  
      'alt-sends-what': function(v) {
        if (!/^(escape|8-bit|browser-key)$/.test(v))
          v = 'escape';
  
        terminal.keyboard.altSendsWhat = v;
      },
  
      'audible-bell-sound': function(v) {
        var ary = v.match(/^lib-resource:(\S+)/);
        if (ary) {
          terminal.bellAudio_.setAttribute('src',
                                           lib.resource.getDataUrl(ary[1]));
        } else {
          terminal.bellAudio_.setAttribute('src', v);
        }
      },
  
      'desktop-notification-bell': function(v) {
        if (v && Notification) {
          terminal.desktopNotificationBell_ =
              Notification.permission === 'granted';
          if (!terminal.desktopNotificationBell_) {
            // Note: We don't call Notification.requestPermission here because
            // Chrome requires the call be the result of a user action (such as an
            // onclick handler), and pref listeners are run asynchronously.
            //
            // A way of working around this would be to display a dialog in the
            // terminal with a "click-to-request-permission" button.
            console.warn('desktop-notification-bell is true but we do not have ' +
                         'permission to display notifications.');
          }
        } else {
          terminal.desktopNotificationBell_ = false;
        }
      },
  
      'background-color': function(v) {
        terminal.setBackgroundColor(v);
      },
  
      'background-image': function(v) {
        terminal.scrollPort_.setBackgroundImage(v);
      },
  
      'background-size': function(v) {
        terminal.scrollPort_.setBackgroundSize(v);
      },
  
      'background-position': function(v) {
        terminal.scrollPort_.setBackgroundPosition(v);
      },
  
      'backspace-sends-backspace': function(v) {
        terminal.keyboard.backspaceSendsBackspace = v;
      },
  
      'character-map-overrides': function(v) {
        if (!(v == null || v instanceof Object)) {
          console.warn('Preference character-map-modifications is not an ' +
                       'object: ' + v);
          return;
        }
  
        for (var code in v) {
          var glmap = hterm.VT.CharacterMap.maps[code].glmap;
          for (var received in v[code]) {
            glmap[received] = v[code][received];
          }
          hterm.VT.CharacterMap.maps[code].reset(glmap);
        }
      },
  
      'cursor-blink': function(v) {
        terminal.setCursorBlink(!!v);
      },
  
      'cursor-blink-cycle': function(v) {
          if (v instanceof Array &&
              typeof v[0] == 'number' &&
              typeof v[1] == 'number') {
            terminal.cursorBlinkCycle_ = v;
          } else if (typeof v == 'number') {
            terminal.cursorBlinkCycle_ = [v, v];
          } else {
            // Fast blink indicates an error.
            terminal.cursorBlinkCycle_ = [100, 100];
          }
      },
  
      'cursor-color': function(v) {
        terminal.setCursorColor(v);
      },
  
      'color-palette-overrides': function(v) {
        if (!(v == null || v instanceof Object || v instanceof Array)) {
          console.warn('Preference color-palette-overrides is not an array or ' +
                       'object: ' + v);
          return;
        }
  
        lib.colors.colorPalette = lib.colors.stockColorPalette.concat();
  
        if (v) {
          for (var key in v) {
            var i = parseInt(key);
            if (isNaN(i) || i < 0 || i > 255) {
              console.log('Invalid value in palette: ' + key + ': ' + v[key]);
              continue;
            }
  
            if (v[i]) {
              var rgb = lib.colors.normalizeCSS(v[i]);
              if (rgb)
                lib.colors.colorPalette[i] = rgb;
            }
          }
        }
  
        terminal.primaryScreen_.textAttributes.resetColorPalette()
        terminal.alternateScreen_.textAttributes.resetColorPalette();
      },
  
      'copy-on-select': function(v) {
        terminal.copyOnSelect = !!v;
      },
  
      'use-default-window-copy': function(v) {
        terminal.useDefaultWindowCopy = !!v;
      },
  
      'clear-selection-after-copy': function(v) {
        terminal.clearSelectionAfterCopy = !!v;
      },
  
      'ctrl-plus-minus-zero-zoom': function(v) {
        terminal.keyboard.ctrlPlusMinusZeroZoom = v;
      },
  
      'ctrl-c-copy': function(v) {
        terminal.keyboard.ctrlCCopy = v;
      },
  
      'ctrl-v-paste': function(v) {
        terminal.keyboard.ctrlVPaste = v;
        terminal.scrollPort_.setCtrlVPaste(v);
      },
  
      'east-asian-ambiguous-as-two-column': function(v) {
        lib.wc.regardCjkAmbiguous = v;
      },
  
      'enable-8-bit-control': function(v) {
        terminal.vt.enable8BitControl = !!v;
      },
  
      'enable-bold': function(v) {
        terminal.syncBoldSafeState();
      },
  
      'enable-bold-as-bright': function(v) {
        terminal.primaryScreen_.textAttributes.enableBoldAsBright = !!v;
        terminal.alternateScreen_.textAttributes.enableBoldAsBright = !!v;
      },
  
      'enable-clipboard-write': function(v) {
        terminal.vt.enableClipboardWrite = !!v;
      },
  
      'enable-dec12': function(v) {
        terminal.vt.enableDec12 = !!v;
      },
  
      'font-family': function(v) {
        terminal.syncFontFamily();
      },
  
      'font-size': function(v) {
        terminal.setFontSize(v);
      },
  
      'font-smoothing': function(v) {
        terminal.syncFontFamily();
      },
  
      'foreground-color': function(v) {
        terminal.setForegroundColor(v);
      },
  
      'home-keys-scroll': function(v) {
        terminal.keyboard.homeKeysScroll = v;
      },
  
      'keybindings': function(v) {
        terminal.keyboard.bindings.clear();
  
        if (!v)
          return;
  
        if (!(v instanceof Object)) {
          console.error('Error in keybindings preference: Expected object');
          return;
        }
  
        try {
          terminal.keyboard.bindings.addBindings(v);
        } catch (ex) {
          console.error('Error in keybindings preference: ' + ex);
        }
      },
  
      'max-string-sequence': function(v) {
        terminal.vt.maxStringSequence = v;
      },
  
      'media-keys-are-fkeys': function(v) {
        terminal.keyboard.mediaKeysAreFKeys = v;
      },
  
      'meta-sends-escape': function(v) {
        terminal.keyboard.metaSendsEscape = v;
      },
  
      'mouse-paste-button': function(v) {
        terminal.syncMousePasteButton();
      },
  
      'page-keys-scroll': function(v) {
        terminal.keyboard.pageKeysScroll = v;
      },
  
      'pass-alt-number': function(v) {
        if (v == null) {
          var osx = window.navigator.userAgent.match(/Mac OS X/);
  
          // Let Alt-1..9 pass to the browser (to control tab switching) on
          // non-OS X systems, or if hterm is not opened in an app window.
          v = (!osx && hterm.windowType != 'popup');
        }
  
        terminal.passAltNumber = v;
      },
  
      'pass-ctrl-number': function(v) {
        if (v == null) {
          var osx = window.navigator.userAgent.match(/Mac OS X/);
  
          // Let Ctrl-1..9 pass to the browser (to control tab switching) on
          // non-OS X systems, or if hterm is not opened in an app window.
          v = (!osx && hterm.windowType != 'popup');
        }
  
        terminal.passCtrlNumber = v;
      },
  
      'pass-meta-number': function(v) {
        if (v == null) {
          var osx = window.navigator.userAgent.match(/Mac OS X/);
  
          // Let Meta-1..9 pass to the browser (to control tab switching) on
          // OS X systems, or if hterm is not opened in an app window.
          v = (osx && hterm.windowType != 'popup');
        }
  
        terminal.passMetaNumber = v;
      },
  
      'pass-meta-v': function(v) {
        terminal.keyboard.passMetaV = v;
      },
  
      'receive-encoding': function(v) {
         if (!(/^(utf-8|raw)$/).test(v)) {
           console.warn('Invalid value for "receive-encoding": ' + v);
           v = 'utf-8';
         }
  
         terminal.vt.characterEncoding = v;
      },
  
      'scroll-on-keystroke': function(v) {
        terminal.scrollOnKeystroke_ = v;
      },
  
      'scroll-on-output': function(v) {
        terminal.scrollOnOutput_ = v;
      },
  
      'scrollbar-visible': function(v) {
        terminal.setScrollbarVisible(v);
      },
  
      'scroll-wheel-move-multiplier': function(v) {
        terminal.setScrollWheelMoveMultipler(v);
      },
  
      'send-encoding': function(v) {
         if (!(/^(utf-8|raw)$/).test(v)) {
           console.warn('Invalid value for "send-encoding": ' + v);
           v = 'utf-8';
         }
  
         terminal.keyboard.characterEncoding = v;
      },
  
      'shift-insert-paste': function(v) {
        terminal.keyboard.shiftInsertPaste = v;
      },
  
      'user-css': function(v) {
        terminal.scrollPort_.setUserCss(v);
      }
    });
  
    this.prefs_.readStorage(function() {
      this.prefs_.notifyAll();
  
      if (opt_callback)
        opt_callback();
    }.bind(this));
  };
  
  
  /**
   * Returns the preferences manager used for configuring this terminal.
   */
  hterm.Terminal.prototype.getPrefs = function() {
    return this.prefs_;
  };
  
  /**
   * Enable or disable bracketed paste mode.
   */
  hterm.Terminal.prototype.setBracketedPaste = function(state) {
    this.options_.bracketedPaste = state;
  };
  
  /**
   * Set the color for the cursor.
   *
   * If you want this setting to persist, set it through prefs_, rather than
   * with this method.
   */
  hterm.Terminal.prototype.setCursorColor = function(color) {
    this.cursorColor_ = color;
    this.cursorNode_.style.backgroundColor = color;
    this.cursorNode_.style.borderColor = color;
  };
  
  /**
   * Return the current cursor color as a string.
   */
  hterm.Terminal.prototype.getCursorColor = function() {
    return this.cursorColor_;
  };
  
  /**
   * Enable or disable mouse based text selection in the terminal.
   */
  hterm.Terminal.prototype.setSelectionEnabled = function(state) {
    this.enableMouseDragScroll = state;
  };
  
  /**
   * Set the background color.
   *
   * If you want this setting to persist, set it through prefs_, rather than
   * with this method.
   */
  hterm.Terminal.prototype.setBackgroundColor = function(color) {
    this.backgroundColor_ = lib.colors.normalizeCSS(color);
    this.primaryScreen_.textAttributes.setDefaults(
        this.foregroundColor_, this.backgroundColor_);
    this.alternateScreen_.textAttributes.setDefaults(
        this.foregroundColor_, this.backgroundColor_);
    this.scrollPort_.setBackgroundColor(color);
  };
  
  /**
   * Return the current terminal background color.
   *
   * Intended for use by other classes, so we don't have to expose the entire
   * prefs_ object.
   */
  hterm.Terminal.prototype.getBackgroundColor = function() {
    return this.backgroundColor_;
  };
  
  /**
   * Set the foreground color.
   *
   * If you want this setting to persist, set it through prefs_, rather than
   * with this method.
   */
  hterm.Terminal.prototype.setForegroundColor = function(color) {
    this.foregroundColor_ = lib.colors.normalizeCSS(color);
    this.primaryScreen_.textAttributes.setDefaults(
        this.foregroundColor_, this.backgroundColor_);
    this.alternateScreen_.textAttributes.setDefaults(
        this.foregroundColor_, this.backgroundColor_);
    this.scrollPort_.setForegroundColor(color);
  };
  
  /**
   * Return the current terminal foreground color.
   *
   * Intended for use by other classes, so we don't have to expose the entire
   * prefs_ object.
   */
  hterm.Terminal.prototype.getForegroundColor = function() {
    return this.foregroundColor_;
  };
  
  /**
   * Create a new instance of a terminal command and run it with a given
   * argument string.
   *
   * @param {function} commandClass The constructor for a terminal command.
   * @param {string} argString The argument string to pass to the command.
   */
  hterm.Terminal.prototype.runCommandClass = function(commandClass, argString) {
    var environment = this.prefs_.get('environment');
    if (typeof environment != 'object' || environment == null)
      environment = {};
  
    var self = this;
    this.command = new commandClass(
        { argString: argString || '',
          io: this.io.push(),
          environment: environment,
          onExit: function(code) {
            self.io.pop();
            self.uninstallKeyboard();
            if (self.prefs_.get('close-on-exit'))
                window.close();
          }
        });
  
    this.installKeyboard();
    this.command.run();
  };
  
  /**
   * Returns true if the current screen is the primary screen, false otherwise.
   */
  hterm.Terminal.prototype.isPrimaryScreen = function() {
    return this.screen_ == this.primaryScreen_;
  };
  
  /**
   * Install the keyboard handler for this terminal.
   *
   * This will prevent the browser from seeing any keystrokes sent to the
   * terminal.
   */
  hterm.Terminal.prototype.installKeyboard = function() {
    this.keyboard.installKeyboard(this.scrollPort_.getDocument().body);
  }
  
  /**
   * Uninstall the keyboard handler for this terminal.
   */
  hterm.Terminal.prototype.uninstallKeyboard = function() {
    this.keyboard.installKeyboard(null);
  }
  
  /**
   * Set the font size for this terminal.
   *
   * Call setFontSize(0) to reset to the default font size.
   *
   * This function does not modify the font-size preference.
   *
   * @param {number} px The desired font size, in pixels.
   */
  hterm.Terminal.prototype.setFontSize = function(px) {
    if (px === 0)
      px = this.prefs_.get('font-size');
  
    this.scrollPort_.setFontSize(px);
    if (this.wcCssRule_) {
      this.wcCssRule_.style.width = this.scrollPort_.characterSize.width * 2 +
          'px';
    }
  };
  
  /**
   * Get the current font size.
   */
  hterm.Terminal.prototype.getFontSize = function() {
    return this.scrollPort_.getFontSize();
  };
  
  /**
   * Get the current font family.
   */
  hterm.Terminal.prototype.getFontFamily = function() {
    return this.scrollPort_.getFontFamily();
  };
  
  /**
   * Set the CSS "font-family" for this terminal.
   */
  hterm.Terminal.prototype.syncFontFamily = function() {
    this.scrollPort_.setFontFamily(this.prefs_.get('font-family'),
                                   this.prefs_.get('font-smoothing'));
    this.syncBoldSafeState();
  };
  
  /**
   * Set this.mousePasteButton based on the mouse-paste-button pref,
   * autodetecting if necessary.
   */
  hterm.Terminal.prototype.syncMousePasteButton = function() {
    var button = this.prefs_.get('mouse-paste-button');
    if (typeof button == 'number') {
      this.mousePasteButton = button;
      return;
    }
  
    var ary = navigator.userAgent.match(/\(X11;\s+(\S+)/);
    if (!ary || ary[2] == 'CrOS') {
      this.mousePasteButton = 2;
    } else {
      this.mousePasteButton = 3;
    }
  };
  
  /**
   * Enable or disable bold based on the enable-bold pref, autodetecting if
   * necessary.
   */
  hterm.Terminal.prototype.syncBoldSafeState = function() {
    var enableBold = this.prefs_.get('enable-bold');
    if (enableBold !== null) {
      this.primaryScreen_.textAttributes.enableBold = enableBold;
      this.alternateScreen_.textAttributes.enableBold = enableBold;
      return;
    }
  
    var normalSize = this.scrollPort_.measureCharacterSize();
    var boldSize = this.scrollPort_.measureCharacterSize('bold');
  
    var isBoldSafe = normalSize.equals(boldSize);
    if (!isBoldSafe) {
      console.warn('Bold characters disabled: Size of bold weight differs ' +
                   'from normal.  Font family is: ' +
                   this.scrollPort_.getFontFamily());
    }
  
    this.primaryScreen_.textAttributes.enableBold = isBoldSafe;
    this.alternateScreen_.textAttributes.enableBold = isBoldSafe;
  };
  
  /**
   * Return a copy of the current cursor position.
   *
   * @return {hterm.RowCol} The RowCol object representing the current position.
   */
  hterm.Terminal.prototype.saveCursor = function() {
    return this.screen_.cursorPosition.clone();
  };
  
  hterm.Terminal.prototype.getTextAttributes = function() {
    return this.screen_.textAttributes;
  };
  
  hterm.Terminal.prototype.setTextAttributes = function(textAttributes) {
    this.screen_.textAttributes = textAttributes;
  };
  
  /**
   * Return the current browser zoom factor applied to the terminal.
   *
   * @return {number} The current browser zoom factor.
   */
  hterm.Terminal.prototype.getZoomFactor = function() {
    return this.scrollPort_.characterSize.zoomFactor;
  };
  
  /**
   * Change the title of this terminal's window.
   */
  hterm.Terminal.prototype.setWindowTitle = function(title) {
    window.document.title = title;
  };
  
  /**
   * Restore a previously saved cursor position.
   *
   * @param {hterm.RowCol} cursor The position to restore.
   */
  hterm.Terminal.prototype.restoreCursor = function(cursor) {
    var row = lib.f.clamp(cursor.row, 0, this.screenSize.height - 1);
    var column = lib.f.clamp(cursor.column, 0, this.screenSize.width - 1);
    this.screen_.setCursorPosition(row, column);
    if (cursor.column > column ||
        cursor.column == column && cursor.overflow) {
      this.screen_.cursorPosition.overflow = true;
    }
  };
  
  /**
   * Clear the cursor's overflow flag.
   */
  hterm.Terminal.prototype.clearCursorOverflow = function() {
    this.screen_.cursorPosition.overflow = false;
  };
  
  /**
   * Sets the cursor shape
   */
  hterm.Terminal.prototype.setCursorShape = function(shape) {
    this.cursorShape_ = shape;
    this.restyleCursor_();
  }
  
  /**
   * Get the cursor shape
   */
  hterm.Terminal.prototype.getCursorShape = function() {
    return this.cursorShape_;
  }
  
  /**
   * Set the width of the terminal, resizing the UI to match.
   */
  hterm.Terminal.prototype.setWidth = function(columnCount) {
    if (columnCount == null) {
      this.div_.style.width = '100%';
      return;
    }
  
    this.div_.style.width = Math.ceil(
        this.scrollPort_.characterSize.width *
        columnCount + this.scrollPort_.currentScrollbarWidthPx) + 'px';
    this.realizeSize_(columnCount, this.screenSize.height);
    this.scheduleSyncCursorPosition_();
  };
  
  /**
   * Set the height of the terminal, resizing the UI to match.
   */
  hterm.Terminal.prototype.setHeight = function(rowCount) {
    if (rowCount == null) {
      this.div_.style.height = '100%';
      return;
    }
  
    this.div_.style.height =
        this.scrollPort_.characterSize.height * rowCount + 'px';
    this.realizeSize_(this.screenSize.width, rowCount);
    this.scheduleSyncCursorPosition_();
  };
  
  /**
   * Deal with terminal size changes.
   *
   */
  hterm.Terminal.prototype.realizeSize_ = function(columnCount, rowCount) {
    if (columnCount != this.screenSize.width)
      this.realizeWidth_(columnCount);
  
    if (rowCount != this.screenSize.height)
      this.realizeHeight_(rowCount);
  
    // Send new terminal size to plugin.
    this.io.onTerminalResize_(columnCount, rowCount);
  };
  
  /**
   * Deal with terminal width changes.
   *
   * This function does what needs to be done when the terminal width changes
   * out from under us.  It happens here rather than in onResize_() because this
   * code may need to run synchronously to handle programmatic changes of
   * terminal width.
   *
   * Relying on the browser to send us an async resize event means we may not be
   * in the correct state yet when the next escape sequence hits.
   */
  hterm.Terminal.prototype.realizeWidth_ = function(columnCount) {
    if (columnCount <= 0)
      throw new Error('Attempt to realize bad width: ' + columnCount);
  
    var deltaColumns = columnCount - this.screen_.getWidth();
  
    this.screenSize.width = columnCount;
    this.screen_.setColumnCount(columnCount);
  
    if (deltaColumns > 0) {
      if (this.defaultTabStops)
        this.setDefaultTabStops(this.screenSize.width - deltaColumns);
    } else {
      for (var i = this.tabStops_.length - 1; i >= 0; i--) {
        if (this.tabStops_[i] < columnCount)
          break;
  
        this.tabStops_.pop();
      }
    }
  
    this.screen_.setColumnCount(this.screenSize.width);
  };
  
  /**
   * Deal with terminal height changes.
   *
   * This function does what needs to be done when the terminal height changes
   * out from under us.  It happens here rather than in onResize_() because this
   * code may need to run synchronously to handle programmatic changes of
   * terminal height.
   *
   * Relying on the browser to send us an async resize event means we may not be
   * in the correct state yet when the next escape sequence hits.
   */
  hterm.Terminal.prototype.realizeHeight_ = function(rowCount) {
    if (rowCount <= 0)
      throw new Error('Attempt to realize bad height: ' + rowCount);
  
    var deltaRows = rowCount - this.screen_.getHeight();
  
    this.screenSize.height = rowCount;
  
    var cursor = this.saveCursor();
  
    if (deltaRows < 0) {
      // Screen got smaller.
      deltaRows *= -1;
      while (deltaRows) {
        var lastRow = this.getRowCount() - 1;
        if (lastRow - this.scrollbackRows_.length == cursor.row)
          break;
  
        if (this.getRowText(lastRow))
          break;
  
        this.screen_.popRow();
        deltaRows--;
      }
  
      var ary = this.screen_.shiftRows(deltaRows);
      this.scrollbackRows_.push.apply(this.scrollbackRows_, ary);
  
      // We just removed rows from the top of the screen, we need to update
      // the cursor to match.
      cursor.row = Math.max(cursor.row - deltaRows, 0);
    } else if (deltaRows > 0) {
      // Screen got larger.
  
      if (deltaRows <= this.scrollbackRows_.length) {
        var scrollbackCount = Math.min(deltaRows, this.scrollbackRows_.length);
        var rows = this.scrollbackRows_.splice(
            this.scrollbackRows_.length - scrollbackCount, scrollbackCount);
        this.screen_.unshiftRows(rows);
        deltaRows -= scrollbackCount;
        cursor.row += scrollbackCount;
      }
  
      if (deltaRows)
        this.appendRows_(deltaRows);
    }
  
    this.setVTScrollRegion(null, null);
    this.restoreCursor(cursor);
  };
  
  /**
   * Scroll the terminal to the top of the scrollback buffer.
   */
  hterm.Terminal.prototype.scrollHome = function() {
    this.scrollPort_.scrollRowToTop(0);
  };
  
  /**
   * Scroll the terminal to the end.
   */
  hterm.Terminal.prototype.scrollEnd = function() {
    this.scrollPort_.scrollRowToBottom(this.getRowCount());
  };
  
  /**
   * Scroll the terminal one page up (minus one line) relative to the current
   * position.
   */
  hterm.Terminal.prototype.scrollPageUp = function() {
    var i = this.scrollPort_.getTopRowIndex();
    this.scrollPort_.scrollRowToTop(i - this.screenSize.height + 1);
  };
  
  /**
   * Scroll the terminal one page down (minus one line) relative to the current
   * position.
   */
  hterm.Terminal.prototype.scrollPageDown = function() {
    var i = this.scrollPort_.getTopRowIndex();
    this.scrollPort_.scrollRowToTop(i + this.screenSize.height - 1);
  };
  
  /**
   * Clear primary screen, secondary screen, and the scrollback buffer.
   */
  hterm.Terminal.prototype.wipeContents = function() {
    this.scrollbackRows_.length = 0;
    this.scrollPort_.resetCache();
  
    [this.primaryScreen_, this.alternateScreen_].forEach(function(screen) {
      var bottom = screen.getHeight();
      if (bottom > 0) {
        this.renumberRows_(0, bottom);
        this.clearHome(screen);
      }
    }.bind(this));
  
    this.syncCursorPosition_();
    this.scrollPort_.invalidate();
  };
  
  /**
   * Full terminal reset.
   */
  hterm.Terminal.prototype.reset = function() {
    this.clearAllTabStops();
    this.setDefaultTabStops();
  
    this.clearHome(this.primaryScreen_);
    this.primaryScreen_.textAttributes.reset();
  
    this.clearHome(this.alternateScreen_);
    this.alternateScreen_.textAttributes.reset();
  
    this.setCursorBlink(!!this.prefs_.get('cursor-blink'));
  
    this.vt.reset();
  
    this.softReset();
  };
  
  /**
   * Soft terminal reset.
   *
   * Perform a soft reset to the default values listed in
   * http://www.vt100.net/docs/vt510-rm/DECSTR#T5-9
   */
  hterm.Terminal.prototype.softReset = function() {
    // Reset terminal options to their default values.
    this.options_ = new hterm.Options();
  
    // We show the cursor on soft reset but do not alter the blink state.
    this.options_.cursorBlink = !!this.timeouts_.cursorBlink;
  
    // Xterm also resets the color palette on soft reset, even though it doesn't
    // seem to be documented anywhere.
    this.primaryScreen_.textAttributes.resetColorPalette();
    this.alternateScreen_.textAttributes.resetColorPalette();
  
    // The xterm man page explicitly says this will happen on soft reset.
    this.setVTScrollRegion(null, null);
  
    // Xterm also shows the cursor on soft reset, but does not alter the blink
    // state.
    this.setCursorVisible(true);
  };
  
  /**
   * Move the cursor forward to the next tab stop, or to the last column
   * if no more tab stops are set.
   */
  hterm.Terminal.prototype.forwardTabStop = function() {
    var column = this.screen_.cursorPosition.column;
  
    for (var i = 0; i < this.tabStops_.length; i++) {
      if (this.tabStops_[i] > column) {
        this.setCursorColumn(this.tabStops_[i]);
        return;
      }
    }
  
    // xterm does not clear the overflow flag on HT or CHT.
    var overflow = this.screen_.cursorPosition.overflow;
    this.setCursorColumn(this.screenSize.width - 1);
    this.screen_.cursorPosition.overflow = overflow;
  };
  
  /**
   * Move the cursor backward to the previous tab stop, or to the first column
   * if no previous tab stops are set.
   */
  hterm.Terminal.prototype.backwardTabStop = function() {
    var column = this.screen_.cursorPosition.column;
  
    for (var i = this.tabStops_.length - 1; i >= 0; i--) {
      if (this.tabStops_[i] < column) {
        this.setCursorColumn(this.tabStops_[i]);
        return;
      }
    }
  
    this.setCursorColumn(1);
  };
  
  /**
   * Set a tab stop at the given column.
   *
   * @param {int} column Zero based column.
   */
  hterm.Terminal.prototype.setTabStop = function(column) {
    for (var i = this.tabStops_.length - 1; i >= 0; i--) {
      if (this.tabStops_[i] == column)
        return;
  
      if (this.tabStops_[i] < column) {
        this.tabStops_.splice(i + 1, 0, column);
        return;
      }
    }
  
    this.tabStops_.splice(0, 0, column);
  };
  
  /**
   * Clear the tab stop at the current cursor position.
   *
   * No effect if there is no tab stop at the current cursor position.
   */
  hterm.Terminal.prototype.clearTabStopAtCursor = function() {
    var column = this.screen_.cursorPosition.column;
  
    var i = this.tabStops_.indexOf(column);
    if (i == -1)
      return;
  
    this.tabStops_.splice(i, 1);
  };
  
  /**
   * Clear all tab stops.
   */
  hterm.Terminal.prototype.clearAllTabStops = function() {
    this.tabStops_.length = 0;
    this.defaultTabStops = false;
  };
  
  /**
   * Set up the default tab stops, starting from a given column.
   *
   * This sets a tabstop every (column % this.tabWidth) column, starting
   * from the specified column, or 0 if no column is provided.  It also flags
   * future resizes to set them up.
   *
   * This does not clear the existing tab stops first, use clearAllTabStops
   * for that.
   *
   * @param {int} opt_start Optional starting zero based starting column, useful
   *     for filling out missing tab stops when the terminal is resized.
   */
  hterm.Terminal.prototype.setDefaultTabStops = function(opt_start) {
    var start = opt_start || 0;
    var w = this.tabWidth;
    // Round start up to a default tab stop.
    start = start - 1 - ((start - 1) % w) + w;
    for (var i = start; i < this.screenSize.width; i += w) {
      this.setTabStop(i);
    }
  
    this.defaultTabStops = true;
  };
  
  /**
   * Interpret a sequence of characters.
   *
   * Incomplete escape sequences are buffered until the next call.
   *
   * @param {string} str Sequence of characters to interpret or pass through.
   */
  hterm.Terminal.prototype.interpret = function(str) {
    this.vt.interpret(str);
    this.scheduleSyncCursorPosition_();
  };
  
  /**
   * Take over the given DIV for use as the terminal display.
   *
   * @param {HTMLDivElement} div The div to use as the terminal display.
   */
  hterm.Terminal.prototype.decorate = function(div) {
    this.div_ = div;
  
    this.scrollPort_.decorate(div);
    this.scrollPort_.setBackgroundImage(this.prefs_.get('background-image'));
    this.scrollPort_.setBackgroundSize(this.prefs_.get('background-size'));
    this.scrollPort_.setBackgroundPosition(
        this.prefs_.get('background-position'));
    this.scrollPort_.setUserCss(this.prefs_.get('user-css'));
  
    this.div_.focus = this.focus.bind(this);
  
    this.setFontSize(this.prefs_.get('font-size'));
    this.syncFontFamily();
  
    this.setScrollbarVisible(this.prefs_.get('scrollbar-visible'));
    this.setScrollWheelMoveMultipler(
        this.prefs_.get('scroll-wheel-move-multiplier'));
  
    this.document_ = this.scrollPort_.getDocument();
  
    this.document_.body.oncontextmenu = function() { return false };
  
    var onMouse = this.onMouse_.bind(this);
    var screenNode = this.scrollPort_.getScreenNode();
    screenNode.addEventListener('mousedown', onMouse);
    screenNode.addEventListener('mouseup', onMouse);
    screenNode.addEventListener('mousemove', onMouse);
    this.scrollPort_.onScrollWheel = onMouse;
  
  //  screenNode.addEventListener(
  //      'focus', this.onFocusChange_.bind(this, true));
  //  // Listen for mousedown events on the screenNode as in FF the focus
  //  // events don't bubble.
  //  screenNode.addEventListener('mousedown', function() {
  //    setTimeout(this.onFocusChange_.bind(this, true));
  //  }.bind(this));
  //
  //  screenNode.addEventListener(
  //      'blur', this.onFocusChange_.bind(this, false));
  
    var style = this.document_.createElement('style');
    style.textContent =
        ('.cursor-node[focus="false"] {' +
         '  box-sizing: border-box;' +
         '  background-color: transparent !important;' +
         '  border-width: 2px;' +
         '  border-style: solid;' +
         '}' +
         '.wc-node {' +
         '  display: inline-block;' +
         '  text-align: center;' +
         '  width: ' + this.scrollPort_.characterSize.width * 2 + 'px;' +
         '}');
    this.document_.head.appendChild(style);
  
    var styleSheets = this.document_.styleSheets;
    var cssRules = styleSheets[styleSheets.length - 1].cssRules;
    this.wcCssRule_ = cssRules[cssRules.length - 1];
  
    this.cursorNode_ = this.document_.createElement('div');
    this.cursorNode_.className = 'cursor-node';
    this.cursorNode_.style.cssText =
        ('position: absolute;' +
         'top: -99px;' +
         'display: block;' +
         'width: ' + this.scrollPort_.characterSize.width + 'px;' +
         'height: ' + this.scrollPort_.characterSize.height + 'px;' +
         '-webkit-transition: opacity, background-color 100ms linear;' +
         '-moz-transition: opacity, background-color 100ms linear;');
  
    this.setCursorColor(this.prefs_.get('cursor-color'));
    this.setCursorBlink(!!this.prefs_.get('cursor-blink'));
    this.restyleCursor_();
  
    this.document_.body.appendChild(this.cursorNode_);
  
    // When 'enableMouseDragScroll' is off we reposition this element directly
    // under the mouse cursor after a click.  This makes Chrome associate
    // subsequent mousemove events with the scroll-blocker.  Since the
    // scroll-blocker is a peer (not a child) of the scrollport, the mousemove
    // events do not cause the scrollport to scroll.
    //
    // It's a hack, but it's the cleanest way I could find.
    this.scrollBlockerNode_ = this.document_.createElement('div');
    this.scrollBlockerNode_.style.cssText =
        ('position: absolute;' +
         'top: -99px;' +
         'display: block;' +
         'width: 10px;' +
         'height: 10px;');
    this.document_.body.appendChild(this.scrollBlockerNode_);
  
    var onMouse = this.onMouse_.bind(this);
    this.scrollPort_.onScrollWheel = onMouse;
    ['mousedown', 'mouseup', 'mousemove', 'click', 'dblclick',
     ].forEach(function(event) {
         this.scrollBlockerNode_.addEventListener(event, onMouse);
         this.cursorNode_.addEventListener(event, onMouse);
         this.document_.addEventListener(event, onMouse);
       }.bind(this));
  
    this.cursorNode_.addEventListener('mousedown', function() {
        setTimeout(this.focus.bind(this));
      }.bind(this));
  
    this.setReverseVideo(false);
  
    this.scrollPort_.focus();
    this.scrollPort_.scheduleRedraw();
  };
  
  /**
   * Return the HTML document that contains the terminal DOM nodes.
   */
  hterm.Terminal.prototype.getDocument = function() {
    return this.document_;
  };
  
  /**
   * Focus the terminal.
   */
  hterm.Terminal.prototype.focus = function() {
    this.scrollPort_.focus();
  };
  
  /**
   * Return the HTML Element for a given row index.
   *
   * This is a method from the RowProvider interface.  The ScrollPort uses
   * it to fetch rows on demand as they are scrolled into view.
   *
   * TODO(rginda): Consider saving scrollback rows as (HTML source, text content)
   * pairs to conserve memory.
   *
   * @param {integer} index The zero-based row index, measured relative to the
   *     start of the scrollback buffer.  On-screen rows will always have the
   *     largest indicies.
   * @return {HTMLElement} The 'x-row' element containing for the requested row.
   */
  hterm.Terminal.prototype.getRowNode = function(index) {
    if (index < this.scrollbackRows_.length)
      return this.scrollbackRows_[index];
  
    var screenIndex = index - this.scrollbackRows_.length;
    return this.screen_.rowsArray[screenIndex];
  };
  
  /**
   * Return the text content for a given range of rows.
   *
   * This is a method from the RowProvider interface.  The ScrollPort uses
   * it to fetch text content on demand when the user attempts to copy their
   * selection to the clipboard.
   *
   * @param {integer} start The zero-based row index to start from, measured
   *     relative to the start of the scrollback buffer.  On-screen rows will
   *     always have the largest indicies.
   * @param {integer} end The zero-based row index to end on, measured
   *     relative to the start of the scrollback buffer.
   * @return {string} A single string containing the text value of the range of
   *     rows.  Lines will be newline delimited, with no trailing newline.
   */
  hterm.Terminal.prototype.getRowsText = function(start, end) {
    var ary = [];
    for (var i = start; i < end; i++) {
      var node = this.getRowNode(i);
      ary.push(node.textContent);
      if (i < end - 1 && !node.getAttribute('line-overflow'))
        ary.push('\n');
    }
  
    return ary.join('');
  };
  
  /**
   * Return the text content for a given row.
   *
   * This is a method from the RowProvider interface.  The ScrollPort uses
   * it to fetch text content on demand when the user attempts to copy their
   * selection to the clipboard.
   *
   * @param {integer} index The zero-based row index to return, measured
   *     relative to the start of the scrollback buffer.  On-screen rows will
   *     always have the largest indicies.
   * @return {string} A string containing the text value of the selected row.
   */
  hterm.Terminal.prototype.getRowText = function(index) {
    var node = this.getRowNode(index);
    return node.textContent;
  };
  
  /**
   * Return the total number of rows in the addressable screen and in the
   * scrollback buffer of this terminal.
   *
   * This is a method from the RowProvider interface.  The ScrollPort uses
   * it to compute the size of the scrollbar.
   *
   * @return {integer} The number of rows in this terminal.
   */
  hterm.Terminal.prototype.getRowCount = function() {
    return this.scrollbackRows_.length + this.screen_.rowsArray.length;
  };
  
  /**
   * Create DOM nodes for new rows and append them to the end of the terminal.
   *
   * This is the only correct way to add a new DOM node for a row.  Notice that
   * the new row is appended to the bottom of the list of rows, and does not
   * require renumbering (of the rowIndex property) of previous rows.
   *
   * If you think you want a new blank row somewhere in the middle of the
   * terminal, look into moveRows_().
   *
   * This method does not pay attention to vtScrollTop/Bottom, since you should
   * be using moveRows() in cases where they would matter.
   *
   * The cursor will be positioned at column 0 of the first inserted line.
   */
  hterm.Terminal.prototype.appendRows_ = function(count) {
    var cursorRow = this.screen_.rowsArray.length;
    var offset = this.scrollbackRows_.length + cursorRow;
    for (var i = 0; i < count; i++) {
      var row = this.document_.createElement('x-row');
      row.appendChild(this.document_.createTextNode(''));
      row.rowIndex = offset + i;
      this.screen_.pushRow(row);
    }
  
    var extraRows = this.screen_.rowsArray.length - this.screenSize.height;
    if (extraRows > 0) {
      var ary = this.screen_.shiftRows(extraRows);
      Array.prototype.push.apply(this.scrollbackRows_, ary);
      if (this.scrollPort_.isScrolledEnd)
        this.scheduleScrollDown_();
    }
  
    if (cursorRow >= this.screen_.rowsArray.length)
      cursorRow = this.screen_.rowsArray.length - 1;
  
    this.setAbsoluteCursorPosition(cursorRow, 0);
  };
  
  /**
   * Relocate rows from one part of the addressable screen to another.
   *
   * This is used to recycle rows during VT scrolls (those which are driven
   * by VT commands, rather than by the user manipulating the scrollbar.)
   *
   * In this case, the blank lines scrolled into the scroll region are made of
   * the nodes we scrolled off.  These have their rowIndex properties carefully
   * renumbered so as not to confuse the ScrollPort.
   */
  hterm.Terminal.prototype.moveRows_ = function(fromIndex, count, toIndex) {
    var ary = this.screen_.removeRows(fromIndex, count);
    this.screen_.insertRows(toIndex, ary);
  
    var start, end;
    if (fromIndex < toIndex) {
      start = fromIndex;
      end = toIndex + count;
    } else {
      start = toIndex;
      end = fromIndex + count;
    }
  
    this.renumberRows_(start, end);
    this.scrollPort_.scheduleInvalidate();
  };
  
  /**
   * Renumber the rowIndex property of the given range of rows.
   *
   * The start and end indicies are relative to the screen, not the scrollback.
   * Rows in the scrollback buffer cannot be renumbered.  Since they are not
   * addressable (you can't delete them, scroll them, etc), you should have
   * no need to renumber scrollback rows.
   */
  hterm.Terminal.prototype.renumberRows_ = function(start, end, opt_screen) {
    var screen = opt_screen || this.screen_;
  
    var offset = this.scrollbackRows_.length;
    for (var i = start; i < end; i++) {
      screen.rowsArray[i].rowIndex = offset + i;
    }
  };
  
  /**
   * Print a string to the terminal.
   *
   * This respects the current insert and wraparound modes.  It will add new lines
   * to the end of the terminal, scrolling off the top into the scrollback buffer
   * if necessary.
   *
   * The string is *not* parsed for escape codes.  Use the interpret() method if
   * that's what you're after.
   *
   * @param{string} str The string to print.
   */
  hterm.Terminal.prototype.print = function(str) {
    var startOffset = 0;
  
    var strWidth = lib.wc.strWidth(str);
  
    while (startOffset < strWidth) {
      if (this.options_.wraparound && this.screen_.cursorPosition.overflow) {
        this.screen_.commitLineOverflow();
        this.newLine();
      }
  
      var count = strWidth - startOffset;
      var didOverflow = false;
      var substr;
  
      if (this.screen_.cursorPosition.column + count >= this.screenSize.width) {
        didOverflow = true;
        count = this.screenSize.width - this.screen_.cursorPosition.column;
      }
  
      if (didOverflow && !this.options_.wraparound) {
        // If the string overflowed the line but wraparound is off, then the
        // last printed character should be the last of the string.
        // TODO: This will add to our problems with multibyte UTF-16 characters.
        substr = lib.wc.substr(str, startOffset, count - 1) +
            lib.wc.substr(str, strWidth - 1);
        count = strWidth;
      } else {
        substr = lib.wc.substr(str, startOffset, count);
      }
  
      var tokens = hterm.TextAttributes.splitWidecharString(substr);
      for (var i = 0; i < tokens.length; i++) {
        if (tokens[i].wcNode)
          this.screen_.textAttributes.wcNode = true;
  
        if (this.options_.insertMode) {
            this.screen_.insertString(tokens[i].str);
        } else {
          this.screen_.overwriteString(tokens[i].str);
        }
        this.screen_.textAttributes.wcNode = false;
      }
  
      this.screen_.maybeClipCurrentRow();
      startOffset += count;
    }
  
    this.scheduleSyncCursorPosition_();
  
    if (this.scrollOnOutput_)
      this.scrollPort_.scrollRowToBottom(this.getRowCount());
  };
  
  /**
   * Set the VT scroll region.
   *
   * This also resets the cursor position to the absolute (0, 0) position, since
   * that's what xterm appears to do.
   *
   * Setting the scroll region to the full height of the terminal will clear
   * the scroll region.  This is *NOT* what most terminals do.  We're explicitly
   * going "off-spec" here because it makes `screen` and `tmux` overflow into the
   * local scrollback buffer, which means the scrollbars and shift-pgup/pgdn
   * continue to work as most users would expect.
   *
   * @param {integer} scrollTop The zero-based top of the scroll region.
   * @param {integer} scrollBottom The zero-based bottom of the scroll region,
   *     inclusive.
   */
  hterm.Terminal.prototype.setVTScrollRegion = function(scrollTop, scrollBottom) {
    if (scrollTop == 0 && scrollBottom == this.screenSize.height - 1) {
      this.vtScrollTop_ = null;
      this.vtScrollBottom_ = null;
    } else {
      this.vtScrollTop_ = scrollTop;
      this.vtScrollBottom_ = scrollBottom;
    }
  };
  
  /**
   * Return the top row index according to the VT.
   *
   * This will return 0 unless the terminal has been told to restrict scrolling
   * to some lower row.  It is used for some VT cursor positioning and scrolling
   * commands.
   *
   * @return {integer} The topmost row in the terminal's scroll region.
   */
  hterm.Terminal.prototype.getVTScrollTop = function() {
    if (this.vtScrollTop_ != null)
      return this.vtScrollTop_;
  
    return 0;
  };
  
  /**
   * Return the bottom row index according to the VT.
   *
   * This will return the height of the terminal unless the it has been told to
   * restrict scrolling to some higher row.  It is used for some VT cursor
   * positioning and scrolling commands.
   *
   * @return {integer} The bottommost row in the terminal's scroll region.
   */
  hterm.Terminal.prototype.getVTScrollBottom = function() {
    if (this.vtScrollBottom_ != null)
      return this.vtScrollBottom_;
  
    return this.screenSize.height - 1;
  }
  
  /**
   * Process a '\n' character.
   *
   * If the cursor is on the final row of the terminal this will append a new
   * blank row to the screen and scroll the topmost row into the scrollback
   * buffer.
   *
   * Otherwise, this moves the cursor to column zero of the next row.
   */
  hterm.Terminal.prototype.newLine = function() {
    var cursorAtEndOfScreen = (this.screen_.cursorPosition.row ==
                               this.screen_.rowsArray.length - 1);
  
    if (this.vtScrollBottom_ != null) {
      // A VT Scroll region is active, we never append new rows.
      if (this.screen_.cursorPosition.row == this.vtScrollBottom_) {
        // We're at the end of the VT Scroll Region, perform a VT scroll.
        this.vtScrollUp(1);
        this.setAbsoluteCursorPosition(this.screen_.cursorPosition.row, 0);
      } else if (cursorAtEndOfScreen) {
        // We're at the end of the screen, the only thing to do is put the
        // cursor to column 0.
        this.setAbsoluteCursorPosition(this.screen_.cursorPosition.row, 0);
      } else {
        // Anywhere else, advance the cursor row, and reset the column.
        this.setAbsoluteCursorPosition(this.screen_.cursorPosition.row + 1, 0);
      }
    } else if (cursorAtEndOfScreen) {
      // We're at the end of the screen.  Append a new row to the terminal,
      // shifting the top row into the scrollback.
      this.appendRows_(1);
    } else {
      // Anywhere else in the screen just moves the cursor.
      this.setAbsoluteCursorPosition(this.screen_.cursorPosition.row + 1, 0);
    }
  };
  
  /**
   * Like newLine(), except maintain the cursor column.
   */
  hterm.Terminal.prototype.lineFeed = function() {
    var column = this.screen_.cursorPosition.column;
    this.newLine();
    this.setCursorColumn(column);
  };
  
  /**
   * If autoCarriageReturn is set then newLine(), else lineFeed().
   */
  hterm.Terminal.prototype.formFeed = function() {
    if (this.options_.autoCarriageReturn) {
      this.newLine();
    } else {
      this.lineFeed();
    }
  };
  
  /**
   * Move the cursor up one row, possibly inserting a blank line.
   *
   * The cursor column is not changed.
   */
  hterm.Terminal.prototype.reverseLineFeed = function() {
    var scrollTop = this.getVTScrollTop();
    var currentRow = this.screen_.cursorPosition.row;
  
    if (currentRow == scrollTop) {
      this.insertLines(1);
    } else {
      this.setAbsoluteCursorRow(currentRow - 1);
    }
  };
  
  /**
   * Replace all characters to the left of the current cursor with the space
   * character.
   *
   * TODO(rginda): This should probably *remove* the characters (not just replace
   * with a space) if there are no characters at or beyond the current cursor
   * position.
   */
  hterm.Terminal.prototype.eraseToLeft = function() {
    var cursor = this.saveCursor();
    this.setCursorColumn(0);
    this.screen_.overwriteString(lib.f.getWhitespace(cursor.column + 1));
    this.restoreCursor(cursor);
  };
  
  /**
   * Erase a given number of characters to the right of the cursor.
   *
   * The cursor position is unchanged.
   *
   * If the current background color is not the default background color this
   * will insert spaces rather than delete.  This is unfortunate because the
   * trailing space will affect text selection, but it's difficult to come up
   * with a way to style empty space that wouldn't trip up the hterm.Screen
   * code.
   *
   * eraseToRight is ignored in the presence of a cursor overflow.  This deviates
   * from xterm, but agrees with gnome-terminal and konsole, xfce4-terminal.  See
   * crbug.com/232390 for details.
   */
  hterm.Terminal.prototype.eraseToRight = function(opt_count) {
    if (this.screen_.cursorPosition.overflow)
      return;
  
    var maxCount = this.screenSize.width - this.screen_.cursorPosition.column;
    var count = opt_count ? Math.min(opt_count, maxCount) : maxCount;
  
    if (this.screen_.textAttributes.background ===
        this.screen_.textAttributes.DEFAULT_COLOR) {
      var cursorRow = this.screen_.rowsArray[this.screen_.cursorPosition.row];
      if (hterm.TextAttributes.nodeWidth(cursorRow) <=
          this.screen_.cursorPosition.column + count) {
        this.screen_.deleteChars(count);
        this.clearCursorOverflow();
        return;
      }
    }
  
    var cursor = this.saveCursor();
    this.screen_.overwriteString(lib.f.getWhitespace(count));
    this.restoreCursor(cursor);
    this.clearCursorOverflow();
  };
  
  /**
   * Erase the current line.
   *
   * The cursor position is unchanged.
   */
  hterm.Terminal.prototype.eraseLine = function() {
    var cursor = this.saveCursor();
    this.screen_.clearCursorRow();
    this.restoreCursor(cursor);
    this.clearCursorOverflow();
  };
  
  /**
   * Erase all characters from the start of the screen to the current cursor
   * position, regardless of scroll region.
   *
   * The cursor position is unchanged.
   */
  hterm.Terminal.prototype.eraseAbove = function() {
    var cursor = this.saveCursor();
  
    this.eraseToLeft();
  
    for (var i = 0; i < cursor.row; i++) {
      this.setAbsoluteCursorPosition(i, 0);
      this.screen_.clearCursorRow();
    }
  
    this.restoreCursor(cursor);
    this.clearCursorOverflow();
  };
  
  /**
   * Erase all characters from the current cursor position to the end of the
   * screen, regardless of scroll region.
   *
   * The cursor position is unchanged.
   */
  hterm.Terminal.prototype.eraseBelow = function() {
    var cursor = this.saveCursor();
  
    this.eraseToRight();
  
    var bottom = this.screenSize.height - 1;
    for (var i = cursor.row + 1; i <= bottom; i++) {
      this.setAbsoluteCursorPosition(i, 0);
      this.screen_.clearCursorRow();
    }
  
    this.restoreCursor(cursor);
    this.clearCursorOverflow();
  };
  
  /**
   * Fill the terminal with a given character.
   *
   * This methods does not respect the VT scroll region.
   *
   * @param {string} ch The character to use for the fill.
   */
  hterm.Terminal.prototype.fill = function(ch) {
    var cursor = this.saveCursor();
  
    this.setAbsoluteCursorPosition(0, 0);
    for (var row = 0; row < this.screenSize.height; row++) {
      for (var col = 0; col < this.screenSize.width; col++) {
        this.setAbsoluteCursorPosition(row, col);
        this.screen_.overwriteString(ch);
      }
    }
  
    this.restoreCursor(cursor);
  };
  
  /**
   * Erase the entire display and leave the cursor at (0, 0).
   *
   * This does not respect the scroll region.
   *
   * @param {hterm.Screen} opt_screen Optional screen to operate on.  Defaults
   *     to the current screen.
   */
  hterm.Terminal.prototype.clearHome = function(opt_screen) {
    var screen = opt_screen || this.screen_;
    var bottom = screen.getHeight();
  
    if (bottom == 0) {
      // Empty screen, nothing to do.
      return;
    }
  
    for (var i = 0; i < bottom; i++) {
      screen.setCursorPosition(i, 0);
      screen.clearCursorRow();
    }
  
    screen.setCursorPosition(0, 0);
  };
  
  /**
   * Erase the entire display without changing the cursor position.
   *
   * The cursor position is unchanged.  This does not respect the scroll
   * region.
   *
   * @param {hterm.Screen} opt_screen Optional screen to operate on.  Defaults
   *     to the current screen.
   */
  hterm.Terminal.prototype.clear = function(opt_screen) {
    var screen = opt_screen || this.screen_;
    var cursor = screen.cursorPosition.clone();
    this.clearHome(screen);
    screen.setCursorPosition(cursor.row, cursor.column);
  };
  
  /**
   * VT command to insert lines at the current cursor row.
   *
   * This respects the current scroll region.  Rows pushed off the bottom are
   * lost (they won't show up in the scrollback buffer).
   *
   * @param {integer} count The number of lines to insert.
   */
  hterm.Terminal.prototype.insertLines = function(count) {
    var cursorRow = this.screen_.cursorPosition.row;
  
    var bottom = this.getVTScrollBottom();
    count = Math.min(count, bottom - cursorRow);
  
    // The moveCount is the number of rows we need to relocate to make room for
    // the new row(s).  The count is the distance to move them.
    var moveCount = bottom - cursorRow - count + 1;
    if (moveCount)
      this.moveRows_(cursorRow, moveCount, cursorRow + count);
  
    for (var i = count - 1; i >= 0; i--) {
      this.setAbsoluteCursorPosition(cursorRow + i, 0);
      this.screen_.clearCursorRow();
    }
  };
  
  /**
   * VT command to delete lines at the current cursor row.
   *
   * New rows are added to the bottom of scroll region to take their place.  New
   * rows are strictly there to take up space and have no content or style.
   */
  hterm.Terminal.prototype.deleteLines = function(count) {
    var cursor = this.saveCursor();
  
    var top = cursor.row;
    var bottom = this.getVTScrollBottom();
  
    var maxCount = bottom - top + 1;
    count = Math.min(count, maxCount);
  
    var moveStart = bottom - count + 1;
    if (count != maxCount)
      this.moveRows_(top, count, moveStart);
  
    for (var i = 0; i < count; i++) {
      this.setAbsoluteCursorPosition(moveStart + i, 0);
      this.screen_.clearCursorRow();
    }
  
    this.restoreCursor(cursor);
    this.clearCursorOverflow();
  };
  
  /**
   * Inserts the given number of spaces at the current cursor position.
   *
   * The cursor position is not changed.
   */
  hterm.Terminal.prototype.insertSpace = function(count) {
    var cursor = this.saveCursor();
  
    var ws = lib.f.getWhitespace(count || 1);
    this.screen_.insertString(ws);
    this.screen_.maybeClipCurrentRow();
  
    this.restoreCursor(cursor);
    this.clearCursorOverflow();
  };
  
  /**
   * Forward-delete the specified number of characters starting at the cursor
   * position.
   *
   * @param {integer} count The number of characters to delete.
   */
  hterm.Terminal.prototype.deleteChars = function(count) {
    var deleted = this.screen_.deleteChars(count);
    if (deleted && !this.screen_.textAttributes.isDefault()) {
      var cursor = this.saveCursor();
      this.setCursorColumn(this.screenSize.width - deleted);
      this.screen_.insertString(lib.f.getWhitespace(deleted));
      this.restoreCursor(cursor);
    }
  
    this.clearCursorOverflow();
  };
  
  /**
   * Shift rows in the scroll region upwards by a given number of lines.
   *
   * New rows are inserted at the bottom of the scroll region to fill the
   * vacated rows.  The new rows not filled out with the current text attributes.
   *
   * This function does not affect the scrollback rows at all.  Rows shifted
   * off the top are lost.
   *
   * The cursor position is not altered.
   *
   * @param {integer} count The number of rows to scroll.
   */
  hterm.Terminal.prototype.vtScrollUp = function(count) {
    var cursor = this.saveCursor();
  
    this.setAbsoluteCursorRow(this.getVTScrollTop());
    this.deleteLines(count);
  
    this.restoreCursor(cursor);
  };
  
  /**
   * Shift rows below the cursor down by a given number of lines.
   *
   * This function respects the current scroll region.
   *
   * New rows are inserted at the top of the scroll region to fill the
   * vacated rows.  The new rows not filled out with the current text attributes.
   *
   * This function does not affect the scrollback rows at all.  Rows shifted
   * off the bottom are lost.
   *
   * @param {integer} count The number of rows to scroll.
   */
  hterm.Terminal.prototype.vtScrollDown = function(opt_count) {
    var cursor = this.saveCursor();
  
    this.setAbsoluteCursorPosition(this.getVTScrollTop(), 0);
    this.insertLines(opt_count);
  
    this.restoreCursor(cursor);
  };
  
  
  /**
   * Set the cursor position.
   *
   * The cursor row is relative to the scroll region if the terminal has
   * 'origin mode' enabled, or relative to the addressable screen otherwise.
   *
   * @param {integer} row The new zero-based cursor row.
   * @param {integer} row The new zero-based cursor column.
   */
  hterm.Terminal.prototype.setCursorPosition = function(row, column) {
    if (this.options_.originMode) {
      this.setRelativeCursorPosition(row, column);
    } else {
      this.setAbsoluteCursorPosition(row, column);
    }
  };
  
  hterm.Terminal.prototype.setRelativeCursorPosition = function(row, column) {
    var scrollTop = this.getVTScrollTop();
    row = lib.f.clamp(row + scrollTop, scrollTop, this.getVTScrollBottom());
    column = lib.f.clamp(column, 0, this.screenSize.width - 1);
    this.screen_.setCursorPosition(row, column);
  };
  
  hterm.Terminal.prototype.setAbsoluteCursorPosition = function(row, column) {
    row = lib.f.clamp(row, 0, this.screenSize.height - 1);
    column = lib.f.clamp(column, 0, this.screenSize.width - 1);
    this.screen_.setCursorPosition(row, column);
  };
  
  /**
   * Set the cursor column.
   *
   * @param {integer} column The new zero-based cursor column.
   */
  hterm.Terminal.prototype.setCursorColumn = function(column) {
    this.setAbsoluteCursorPosition(this.screen_.cursorPosition.row, column);
  };
  
  /**
   * Return the cursor column.
   *
   * @return {integer} The zero-based cursor column.
   */
  hterm.Terminal.prototype.getCursorColumn = function() {
    return this.screen_.cursorPosition.column;
  };
  
  /**
   * Set the cursor row.
   *
   * The cursor row is relative to the scroll region if the terminal has
   * 'origin mode' enabled, or relative to the addressable screen otherwise.
   *
   * @param {integer} row The new cursor row.
   */
  hterm.Terminal.prototype.setAbsoluteCursorRow = function(row) {
    this.setAbsoluteCursorPosition(row, this.screen_.cursorPosition.column);
  };
  
  /**
   * Return the cursor row.
   *
   * @return {integer} The zero-based cursor row.
   */
  hterm.Terminal.prototype.getCursorRow = function(row) {
    return this.screen_.cursorPosition.row;
  };
  
  /**
   * Request that the ScrollPort redraw itself soon.
   *
   * The redraw will happen asynchronously, soon after the call stack winds down.
   * Multiple calls will be coalesced into a single redraw.
   */
  hterm.Terminal.prototype.scheduleRedraw_ = function() {
    if (this.timeouts_.redraw)
      return;
  
    var self = this;
    this.timeouts_.redraw = setTimeout(function() {
        delete self.timeouts_.redraw;
        self.scrollPort_.redraw_();
      }, 0);
  };
  
  /**
   * Request that the ScrollPort be scrolled to the bottom.
   *
   * The scroll will happen asynchronously, soon after the call stack winds down.
   * Multiple calls will be coalesced into a single scroll.
   *
   * This affects the scrollbar position of the ScrollPort, and has nothing to
   * do with the VT scroll commands.
   */
  hterm.Terminal.prototype.scheduleScrollDown_ = function() {
    if (this.timeouts_.scrollDown)
      return;
  
    var self = this;
    this.timeouts_.scrollDown = setTimeout(function() {
        delete self.timeouts_.scrollDown;
        self.scrollPort_.scrollRowToBottom(self.getRowCount());
      }, 10);
  };
  
  /**
   * Move the cursor up a specified number of rows.
   *
   * @param {integer} count The number of rows to move the cursor.
   */
  hterm.Terminal.prototype.cursorUp = function(count) {
    return this.cursorDown(-(count || 1));
  };
  
  /**
   * Move the cursor down a specified number of rows.
   *
   * @param {integer} count The number of rows to move the cursor.
   */
  hterm.Terminal.prototype.cursorDown = function(count) {
    count = count || 1;
    var minHeight = (this.options_.originMode ? this.getVTScrollTop() : 0);
    var maxHeight = (this.options_.originMode ? this.getVTScrollBottom() :
                     this.screenSize.height - 1);
  
    var row = lib.f.clamp(this.screen_.cursorPosition.row + count,
                          minHeight, maxHeight);
    this.setAbsoluteCursorRow(row);
  };
  
  /**
   * Move the cursor left a specified number of columns.
   *
   * If reverse wraparound mode is enabled and the previous row wrapped into
   * the current row then we back up through the wraparound as well.
   *
   * @param {integer} count The number of columns to move the cursor.
   */
  hterm.Terminal.prototype.cursorLeft = function(count) {
    count = count || 1;
  
    if (count < 1)
      return;
  
    var currentColumn = this.screen_.cursorPosition.column;
    if (this.options_.reverseWraparound) {
      if (this.screen_.cursorPosition.overflow) {
        // If this cursor is in the right margin, consume one count to get it
        // back to the last column.  This only applies when we're in reverse
        // wraparound mode.
        count--;
        this.clearCursorOverflow();
  
        if (!count)
          return;
      }
  
      var newRow = this.screen_.cursorPosition.row;
      var newColumn = currentColumn - count;
      if (newColumn < 0) {
        newRow = newRow - Math.floor(count / this.screenSize.width) - 1;
        if (newRow < 0) {
          // xterm also wraps from row 0 to the last row.
          newRow = this.screenSize.height + newRow % this.screenSize.height;
        }
        newColumn = this.screenSize.width + newColumn % this.screenSize.width;
      }
  
      this.setCursorPosition(Math.max(newRow, 0), newColumn);
  
    } else {
      var newColumn = Math.max(currentColumn - count, 0);
      this.setCursorColumn(newColumn);
    }
  };
  
  /**
   * Move the cursor right a specified number of columns.
   *
   * @param {integer} count The number of columns to move the cursor.
   */
  hterm.Terminal.prototype.cursorRight = function(count) {
    count = count || 1;
  
    if (count < 1)
      return;
  
    var column = lib.f.clamp(this.screen_.cursorPosition.column + count,
                             0, this.screenSize.width - 1);
    this.setCursorColumn(column);
  };
  
  /**
   * Reverse the foreground and background colors of the terminal.
   *
   * This only affects text that was drawn with no attributes.
   *
   * TODO(rginda): Test xterm to see if reverse is respected for text that has
   * been drawn with attributes that happen to coincide with the default
   * 'no-attribute' colors.  My guess is probably not.
   */
  hterm.Terminal.prototype.setReverseVideo = function(state) {
    this.options_.reverseVideo = state;
    if (state) {
      this.scrollPort_.setForegroundColor(this.prefs_.get('background-color'));
      this.scrollPort_.setBackgroundColor(this.prefs_.get('foreground-color'));
    } else {
      this.scrollPort_.setForegroundColor(this.prefs_.get('foreground-color'));
      this.scrollPort_.setBackgroundColor(this.prefs_.get('background-color'));
    }
  };
  
  /**
   * Ring the terminal bell.
   *
   * This will not play the bell audio more than once per second.
   */
  hterm.Terminal.prototype.ringBell = function() {
    this.cursorNode_.style.backgroundColor =
        this.scrollPort_.getForegroundColor();
  
    var self = this;
    setTimeout(function() {
        self.cursorNode_.style.backgroundColor = self.prefs_.get('cursor-color');
      }, 200);
  
    // bellSquelchTimeout_ affects both audio and notification bells.
    if (this.bellSquelchTimeout_)
      return;
  
    if (this.bellAudio_.getAttribute('src')) {
      this.bellAudio_.play();
      this.bellSequelchTimeout_ = setTimeout(function() {
          delete this.bellSquelchTimeout_;
        }.bind(this), 500);
    } else {
      delete this.bellSquelchTimeout_;
    }
  
    if (this.desktopNotificationBell_ && !this.document_.hasFocus()) {
      var n = new Notification(
          lib.f.replaceVars(hterm.desktopNotificationTitle,
                            {'title': window.document.title || 'hterm'}));
      this.bellNotificationList_.push(n);
      // TODO: Should we try to raise the window here?
      n.onclick = function() { self.closeBellNotifications_(); };
    }
  };
  
  /**
   * Set the origin mode bit.
   *
   * If origin mode is on, certain VT cursor and scrolling commands measure their
   * row parameter relative to the VT scroll region.  Otherwise, row 0 corresponds
   * to the top of the addressable screen.
   *
   * Defaults to off.
   *
   * @param {boolean} state True to set origin mode, false to unset.
   */
  hterm.Terminal.prototype.setOriginMode = function(state) {
    this.options_.originMode = state;
    this.setCursorPosition(0, 0);
  };
  
  /**
   * Set the insert mode bit.
   *
   * If insert mode is on, existing text beyond the cursor position will be
   * shifted right to make room for new text.  Otherwise, new text overwrites
   * any existing text.
   *
   * Defaults to off.
   *
   * @param {boolean} state True to set insert mode, false to unset.
   */
  hterm.Terminal.prototype.setInsertMode = function(state) {
    this.options_.insertMode = state;
  };
  
  /**
   * Set the auto carriage return bit.
   *
   * If auto carriage return is on then a formfeed character is interpreted
   * as a newline, otherwise it's the same as a linefeed.  The difference boils
   * down to whether or not the cursor column is reset.
   */
  hterm.Terminal.prototype.setAutoCarriageReturn = function(state) {
    this.options_.autoCarriageReturn = state;
  };
  
  /**
   * Set the wraparound mode bit.
   *
   * If wraparound mode is on, certain VT commands will allow the cursor to wrap
   * to the start of the following row.  Otherwise, the cursor is clamped to the
   * end of the screen and attempts to write past it are ignored.
   *
   * Defaults to on.
   *
   * @param {boolean} state True to set wraparound mode, false to unset.
   */
  hterm.Terminal.prototype.setWraparound = function(state) {
    this.options_.wraparound = state;
  };
  
  /**
   * Set the reverse-wraparound mode bit.
   *
   * If wraparound mode is off, certain VT commands will allow the cursor to wrap
   * to the end of the previous row.  Otherwise, the cursor is clamped to column
   * 0.
   *
   * Defaults to off.
   *
   * @param {boolean} state True to set reverse-wraparound mode, false to unset.
   */
  hterm.Terminal.prototype.setReverseWraparound = function(state) {
    this.options_.reverseWraparound = state;
  };
  
  /**
   * Selects between the primary and alternate screens.
   *
   * If alternate mode is on, the alternate screen is active.  Otherwise the
   * primary screen is active.
   *
   * Swapping screens has no effect on the scrollback buffer.
   *
   * Each screen maintains its own cursor position.
   *
   * Defaults to off.
   *
   * @param {boolean} state True to set alternate mode, false to unset.
   */
  hterm.Terminal.prototype.setAlternateMode = function(state) {
    var cursor = this.saveCursor();
    this.screen_ = state ? this.alternateScreen_ : this.primaryScreen_;
  
    if (this.screen_.rowsArray.length &&
        this.screen_.rowsArray[0].rowIndex != this.scrollbackRows_.length) {
      // If the screen changed sizes while we were away, our rowIndexes may
      // be incorrect.
      var offset = this.scrollbackRows_.length;
      var ary = this.screen_.rowsArray;
      for (var i = 0; i < ary.length; i++) {
        ary[i].rowIndex = offset + i;
      }
    }
  
    this.realizeWidth_(this.screenSize.width);
    this.realizeHeight_(this.screenSize.height);
    this.scrollPort_.syncScrollHeight();
    this.scrollPort_.invalidate();
  
    this.restoreCursor(cursor);
    this.scrollPort_.resize();
  };
  
  /**
   * Set the cursor-blink mode bit.
   *
   * If cursor-blink is on, the cursor will blink when it is visible.  Otherwise
   * a visible cursor does not blink.
   *
   * You should make sure to turn blinking off if you're going to dispose of a
   * terminal, otherwise you'll leak a timeout.
   *
   * Defaults to on.
   *
   * @param {boolean} state True to set cursor-blink mode, false to unset.
   */
  hterm.Terminal.prototype.setCursorBlink = function(state) {
    this.options_.cursorBlink = state;
  
    if (!state && this.timeouts_.cursorBlink) {
      clearTimeout(this.timeouts_.cursorBlink);
      delete this.timeouts_.cursorBlink;
    }
  
    if (this.options_.cursorVisible)
      this.setCursorVisible(true);
  };
  
  /**
   * Set the cursor-visible mode bit.
   *
   * If cursor-visible is on, the cursor will be visible.  Otherwise it will not.
   *
   * Defaults to on.
   *
   * @param {boolean} state True to set cursor-visible mode, false to unset.
   */
  hterm.Terminal.prototype.setCursorVisible = function(state) {
    this.options_.cursorVisible = state;
  
    if (!state) {
      if (this.timeouts_.cursorBlink) {
        clearTimeout(this.timeouts_.cursorBlink);
        delete this.timeouts_.cursorBlink;
      }
      this.cursorNode_.style.opacity = '0';
      return;
    }
  
    this.syncCursorPosition_();
  
    this.cursorNode_.style.opacity = '1';
  
    if (this.options_.cursorBlink) {
      if (this.timeouts_.cursorBlink)
        return;
  
      this.onCursorBlink_();
    } else {
      if (this.timeouts_.cursorBlink) {
        clearTimeout(this.timeouts_.cursorBlink);
        delete this.timeouts_.cursorBlink;
      }
    }
  };
  
  /**
   * Synchronizes the visible cursor and document selection with the current
   * cursor coordinates.
   */
  hterm.Terminal.prototype.syncCursorPosition_ = function() {
    var topRowIndex = this.scrollPort_.getTopRowIndex();
    var bottomRowIndex = this.scrollPort_.getBottomRowIndex(topRowIndex);
    var cursorRowIndex = this.scrollbackRows_.length +
        this.screen_.cursorPosition.row;
  
    if (cursorRowIndex > bottomRowIndex) {
      // Cursor is scrolled off screen, move it outside of the visible area.
      this.cursorNode_.style.top = -this.scrollPort_.characterSize.height + 'px';
      return;
    }
  
    if (this.options_.cursorVisible &&
        this.cursorNode_.style.display == 'none') {
      // Re-display the terminal cursor if it was hidden by the mouse cursor.
      this.cursorNode_.style.display = '';
    }
  
  
    this.cursorNode_.style.top = this.scrollPort_.visibleRowTopMargin +
        this.scrollPort_.characterSize.height * (cursorRowIndex - topRowIndex) +
        'px';
    this.cursorNode_.style.left = this.scrollPort_.characterSize.width *
        this.screen_.cursorPosition.column + 'px';
  
    this.cursorNode_.setAttribute('title',
                                  '(' + this.screen_.cursorPosition.row +
                                  ', ' + this.screen_.cursorPosition.column +
                                  ')');
  
    // Update the caret for a11y purposes.
    var selection = this.document_.getSelection();
    if (selection && selection.isCollapsed)
      this.screen_.syncSelectionCaret(selection);
  };
  
  /**
   * Adjusts the style of this.cursorNode_ according to the current cursor shape
   * and character cell dimensions.
   */
  hterm.Terminal.prototype.restyleCursor_ = function() {
    var shape = this.cursorShape_;
  
    if (this.cursorNode_.getAttribute('focus') == 'false') {
      // Always show a block cursor when unfocused.
      shape = hterm.Terminal.cursorShape.BLOCK;
    }
  
    var style = this.cursorNode_.style;
  
    style.width = this.scrollPort_.characterSize.width + 'px';
  
    switch (shape) {
      case hterm.Terminal.cursorShape.BEAM:
        style.height = this.scrollPort_.characterSize.height + 'px';
        style.backgroundColor = 'transparent';
        style.borderBottomStyle = null;
        style.borderLeftStyle = 'solid';
        break;
  
      case hterm.Terminal.cursorShape.UNDERLINE:
        style.height = this.scrollPort_.characterSize.baseline + 'px';
        style.backgroundColor = 'transparent';
        style.borderBottomStyle = 'solid';
        // correct the size to put it exactly at the baseline
        style.borderLeftStyle = null;
        break;
  
      default:
        style.height = this.scrollPort_.characterSize.height + 'px';
        style.backgroundColor = this.cursorColor_;
        style.borderBottomStyle = null;
        style.borderLeftStyle = null;
        break;
    }
  };
  
  /**
   * Synchronizes the visible cursor with the current cursor coordinates.
   *
   * The sync will happen asynchronously, soon after the call stack winds down.
   * Multiple calls will be coalesced into a single sync.
   */
  hterm.Terminal.prototype.scheduleSyncCursorPosition_ = function() {
    if (this.timeouts_.syncCursor)
      return;
  
    var self = this;
    this.timeouts_.syncCursor = setTimeout(function() {
        self.syncCursorPosition_();
        delete self.timeouts_.syncCursor;
      }, 0);
  };
  
  /**
   * Show or hide the zoom warning.
   *
   * The zoom warning is a message warning the user that their browser zoom must
   * be set to 100% in order for hterm to function properly.
   *
   * @param {boolean} state True to show the message, false to hide it.
   */
  hterm.Terminal.prototype.showZoomWarning_ = function(state) {
    if (!this.zoomWarningNode_) {
      if (!state)
        return;
  
      this.zoomWarningNode_ = this.document_.createElement('div');
      this.zoomWarningNode_.style.cssText = (
          'color: black;' +
          'background-color: #ff2222;' +
          'font-size: large;' +
          'border-radius: 8px;' +
          'opacity: 0.75;' +
          'padding: 0.2em 0.5em 0.2em 0.5em;' +
          'top: 0.5em;' +
          'right: 1.2em;' +
          'position: absolute;' +
          '-webkit-text-size-adjust: none;' +
          '-webkit-user-select: none;' +
          '-moz-text-size-adjust: none;' +
          '-moz-user-select: none;');
    }
  
    this.zoomWarningNode_.textContent = lib.MessageManager.replaceReferences(
        hterm.zoomWarningMessage,
        [parseInt(this.scrollPort_.characterSize.zoomFactor * 100)]);
  
    this.zoomWarningNode_.style.fontFamily = this.prefs_.get('font-family');
  
    if (state) {
      if (!this.zoomWarningNode_.parentNode)
        this.div_.parentNode.appendChild(this.zoomWarningNode_);
    } else if (this.zoomWarningNode_.parentNode) {
      this.zoomWarningNode_.parentNode.removeChild(this.zoomWarningNode_);
    }
  };
  
  /**
   * Show the terminal overlay for a given amount of time.
   *
   * The terminal overlay appears in inverse video in a large font, centered
   * over the terminal.  You should probably keep the overlay message brief,
   * since it's in a large font and you probably aren't going to check the size
   * of the terminal first.
   *
   * @param {string} msg The text (not HTML) message to display in the overlay.
   * @param {number} opt_timeout The amount of time to wait before fading out
   *     the overlay.  Defaults to 1.5 seconds.  Pass null to have the overlay
   *     stay up forever (or until the next overlay).
   */
  hterm.Terminal.prototype.showOverlay = function(msg, opt_timeout) {
    if (!this.overlayNode_) {
      if (!this.div_)
        return;
  
      this.overlayNode_ = this.document_.createElement('div');
      this.overlayNode_.style.cssText = (
          'border-radius: 15px;' +
          'font-size: xx-large;' +
          'opacity: 0.75;' +
          'padding: 0.2em 0.5em 0.2em 0.5em;' +
          'position: absolute;' +
          '-webkit-user-select: none;' +
          '-webkit-transition: opacity 180ms ease-in;' +
          '-moz-user-select: none;' +
          '-moz-transition: opacity 180ms ease-in;');
  
      this.overlayNode_.addEventListener('mousedown', function(e) {
        e.preventDefault();
        e.stopPropagation();
      }, true);
    }
  
    this.overlayNode_.style.color = this.prefs_.get('background-color');
    this.overlayNode_.style.backgroundColor = this.prefs_.get('foreground-color');
    this.overlayNode_.style.fontFamily = this.prefs_.get('font-family');
  
    this.overlayNode_.textContent = msg;
    this.overlayNode_.style.opacity = '0.75';
  
    if (!this.overlayNode_.parentNode)
      this.div_.appendChild(this.overlayNode_);
  
    var divSize = hterm.getClientSize(this.div_);
    var overlaySize = hterm.getClientSize(this.overlayNode_);
  
    this.overlayNode_.style.top =
        (divSize.height - overlaySize.height) / 2 + 'px';
    this.overlayNode_.style.left = (divSize.width - overlaySize.width -
        this.scrollPort_.currentScrollbarWidthPx) / 2 + 'px';
  
    var self = this;
  
    if (this.overlayTimeout_)
      clearTimeout(this.overlayTimeout_);
  
    if (opt_timeout === null)
      return;
  
    this.overlayTimeout_ = setTimeout(function() {
        self.overlayNode_.style.opacity = '0';
        self.overlayTimeout_ = setTimeout(function() {
            if (self.overlayNode_.parentNode)
              self.overlayNode_.parentNode.removeChild(self.overlayNode_);
            self.overlayTimeout_ = null;
            self.overlayNode_.style.opacity = '0.75';
          }, 200);
      }, opt_timeout || 1500);
  };
  
  /**
   * Paste from the system clipboard to the terminal.
   */
  hterm.Terminal.prototype.paste = function() {
    hterm.pasteFromClipboard(this.document_);
  };
  
  /**
   * Copy a string to the system clipboard.
   *
   * Note: If there is a selected range in the terminal, it'll be cleared.
   */
  hterm.Terminal.prototype.copyStringToClipboard = function(str) {
    if (this.prefs_.get('enable-clipboard-notice'))
      setTimeout(this.showOverlay.bind(this, hterm.notifyCopyMessage, 500), 200);
  
    var copySource = this.document_.createElement('pre');
    copySource.textContent = str;
    copySource.style.cssText = (
        '-webkit-user-select: text;' +
        '-moz-user-select: text;' +
        'position: absolute;' +
        'top: -99px');
  
    this.document_.body.appendChild(copySource);
  
    var selection = this.document_.getSelection();
    var anchorNode = selection.anchorNode;
    var anchorOffset = selection.anchorOffset;
    var focusNode = selection.focusNode;
    var focusOffset = selection.focusOffset;
  
    selection.selectAllChildren(copySource);
  
    hterm.copySelectionToClipboard(this.document_);
  
    // IE doesn't support selection.extend. This means that the selection
    // won't return on IE.
    if (selection.extend) {
      selection.collapse(anchorNode, anchorOffset);
      selection.extend(focusNode, focusOffset);
    }
  
    copySource.parentNode.removeChild(copySource);
  };
  
  hterm.Terminal.prototype.getSelectionText = function() {
    var selection = this.scrollPort_.selection;
    selection.sync();
  
    if (selection.isCollapsed)
      return null;
  
  
    // Start offset measures from the beginning of the line.
    var startOffset = selection.startOffset;
    var node = selection.startNode;
  
    if (node.nodeName != 'X-ROW') {
      // If the selection doesn't start on an x-row node, then it must be
      // somewhere inside the x-row.  Add any characters from previous siblings
      // into the start offset.
  
      if (node.nodeName == '#text' && node.parentNode.nodeName == 'SPAN') {
        // If node is the text node in a styled span, move up to the span node.
        node = node.parentNode;
      }
  
      while (node.previousSibling) {
        node = node.previousSibling;
        startOffset += hterm.TextAttributes.nodeWidth(node);
      }
    }
  
    // End offset measures from the end of the line.
    var endOffset = (hterm.TextAttributes.nodeWidth(selection.endNode) -
                     selection.endOffset);
    var node = selection.endNode;
  
    if (node.nodeName != 'X-ROW') {
      // If the selection doesn't end on an x-row node, then it must be
      // somewhere inside the x-row.  Add any characters from following siblings
      // into the end offset.
  
      if (node.nodeName == '#text' && node.parentNode.nodeName == 'SPAN') {
        // If node is the text node in a styled span, move up to the span node.
        node = node.parentNode;
      }
  
      while (node.nextSibling) {
        node = node.nextSibling;
        endOffset += hterm.TextAttributes.nodeWidth(node);
      }
    }
  
    var rv = this.getRowsText(selection.startRow.rowIndex,
                              selection.endRow.rowIndex + 1);
    return lib.wc.substring(rv, startOffset, lib.wc.strWidth(rv) - endOffset);
  };
  
  /**
   * Copy the current selection to the system clipboard, then clear it after a
   * short delay.
   */
  hterm.Terminal.prototype.copySelectionToClipboard = function() {
    var text = this.getSelectionText();
    if (text != null)
      this.copyStringToClipboard(text);
  };
  
  hterm.Terminal.prototype.overlaySize = function() {
    this.showOverlay(this.screenSize.width + 'x' + this.screenSize.height);
  };
  
  /**
   * Invoked by hterm.Terminal.Keyboard when a VT keystroke is detected.
   *
   * @param {string} string The VT string representing the keystroke, in UTF-16.
   */
  hterm.Terminal.prototype.onVTKeystroke = function(string) {
    if (this.scrollOnKeystroke_)
      this.scrollPort_.scrollRowToBottom(this.getRowCount());
  
    this.io.onVTKeystroke(this.keyboard.encode(string));
  };
  
  /**
   * Add the terminalRow and terminalColumn properties to mouse events and
   * then forward on to onMouse().
   *
   * The terminalRow and terminalColumn properties contain the (row, column)
   * coordinates for the mouse event.
   */
  hterm.Terminal.prototype.onMouse_ = function(e) {
    if (e.processedByTerminalHandler_) {
      // We register our event handlers on the document, as well as the cursor
      // and the scroll blocker.  Mouse events that occur on the cursor or
      // scroll blocker will also appear on the document, but we don't want to
      // process them twice.
      //
      // We can't just prevent bubbling because that has other side effects, so
      // we decorate the event object with this property instead.
      return;
    }
  
    var reportMouseEvents = (!this.defeatMouseReports_ &&
        this.vt.mouseReport != this.vt.MOUSE_REPORT_DISABLED);
  
    e.processedByTerminalHandler_ = true;
  
    // One based row/column stored on the mouse event.
    e.terminalRow = parseInt((e.clientY - this.scrollPort_.visibleRowTopMargin) /
                             this.scrollPort_.characterSize.height) + 1;
    e.terminalColumn = parseInt(e.clientX /
                                this.scrollPort_.characterSize.width) + 1;
  
    if (e.type == 'mousedown' && e.terminalColumn > this.screenSize.width) {
      // Mousedown in the scrollbar area.
      return;
    }
  
    if (this.options_.cursorVisible && !reportMouseEvents) {
      // If the cursor is visible and we're not sending mouse events to the
      // host app, then we want to hide the terminal cursor when the mouse
      // cursor is over top.  This keeps the terminal cursor from interfering
      // with local text selection.
      if (e.terminalRow - 1 == this.screen_.cursorPosition.row &&
          e.terminalColumn - 1 == this.screen_.cursorPosition.column) {
        this.cursorNode_.style.display = 'none';
      } else if (this.cursorNode_.style.display == 'none') {
        this.cursorNode_.style.display = '';
      }
    }
  
    if (e.type == 'mousedown') {
      if (e.altKey || !reportMouseEvents) {
        // If VT mouse reporting is disabled, or has been defeated with
        // alt-mousedown, then the mouse will act on the local selection.
        this.defeatMouseReports_ = true;
        this.setSelectionEnabled(true);
      } else {
        // Otherwise we defer ownership of the mouse to the VT.
        this.defeatMouseReports_ = false;
        this.document_.getSelection().collapseToEnd();
        this.setSelectionEnabled(false);
        e.preventDefault();
      }
    }
  
    if (!reportMouseEvents) {
      if (e.type == 'dblclick') {
        this.screen_.expandSelection(this.document_.getSelection());
        hterm.copySelectionToClipboard(this.document_);
      }
  
      if (e.type == 'mousedown' && e.which == this.mousePasteButton)
        this.paste();
  
      if (e.type == 'mouseup' && e.which == 1 && this.copyOnSelect &&
          !this.document_.getSelection().isCollapsed) {
        hterm.copySelectionToClipboard(this.document_);
      }
  
      if ((e.type == 'mousemove' || e.type == 'mouseup') &&
          this.scrollBlockerNode_.engaged) {
        // Disengage the scroll-blocker after one of these events.
        this.scrollBlockerNode_.engaged = false;
        this.scrollBlockerNode_.style.top = '-99px';
      }
  
    } else /* if (this.reportMouseEvents) */ {
      if (!this.scrollBlockerNode_.engaged) {
        if (e.type == 'mousedown') {
          // Move the scroll-blocker into place if we want to keep the scrollport
          // from scrolling.
          this.scrollBlockerNode_.engaged = true;
          this.scrollBlockerNode_.style.top = (e.clientY - 5) + 'px';
          this.scrollBlockerNode_.style.left = (e.clientX - 5) + 'px';
        } else if (e.type == 'mousemove') {
          // Oh.  This means that drag-scroll was disabled AFTER the mouse down,
          // in which case it's too late to engage the scroll-blocker.
          this.document_.getSelection().collapseToEnd();
          e.preventDefault();
        }
      }
  
      this.onMouse(e);
    }
  
    if (e.type == 'mouseup' && this.document_.getSelection().isCollapsed) {
      // Restore this on mouseup in case it was temporarily defeated with a
      // alt-mousedown.  Only do this when the selection is empty so that
      // we don't immediately kill the users selection.
      this.defeatMouseReports_ = false;
    }
  };
  
  /**
   * Clients should override this if they care to know about mouse events.
   *
   * The event parameter will be a normal DOM mouse click event with additional
   * 'terminalRow' and 'terminalColumn' properties.
   */
  hterm.Terminal.prototype.onMouse = function(e) { };
  
  /**
   * React when focus changes.
   */
  hterm.Terminal.prototype.onFocusChange_ = function(focused) {
                                        console.log(focused);
    this.cursorNode_.setAttribute('focus', focused);
    this.restyleCursor_();
    if (focused === true)
      this.closeBellNotifications_();
  };
  
  /**
   * React when the ScrollPort is scrolled.
   */
  hterm.Terminal.prototype.onScroll_ = function() {
    this.scheduleSyncCursorPosition_();
  };
  
  /**
   * React when text is pasted into the scrollPort.
   */
  hterm.Terminal.prototype.onPaste_ = function(e) {
    var data = e.text.replace(/\n/mg, '\r');
    data = this.keyboard.encode(data);
    if (this.options_.bracketedPaste)
      data = '\x1b[200~' + data + '\x1b[201~';
  
    this.io.sendString(data);
  };
  
  /**
   * React when the user tries to copy from the scrollPort.
   */
  hterm.Terminal.prototype.onCopy_ = function(e) {
    if (!this.useDefaultWindowCopy) {
      e.preventDefault();
      setTimeout(this.copySelectionToClipboard.bind(this), 0);
    }
  };
  
  /**
   * React when the ScrollPort is resized.
   *
   * Note: This function should not directly contain code that alters the internal
   * state of the terminal.  That kind of code belongs in realizeWidth or
   * realizeHeight, so that it can be executed synchronously in the case of a
   * programmatic width change.
   */
  hterm.Terminal.prototype.onResize_ = function() {
    var columnCount = Math.floor(this.scrollPort_.getScreenWidth() /
                                 this.scrollPort_.characterSize.width) || 0;
    var rowCount = lib.f.smartFloorDivide(this.scrollPort_.getScreenHeight(),
                              this.scrollPort_.characterSize.height) || 0;
  
    if (columnCount <= 0 || rowCount <= 0) {
      // We avoid these situations since they happen sometimes when the terminal
      // gets removed from the document or during the initial load, and we can't
      // deal with that.
      // This can also happen if called before the scrollPort calculates the
      // character size, meaning we dived by 0 above and default to 0 values.
      return;
    }
  
    var isNewSize = (columnCount != this.screenSize.width ||
                     rowCount != this.screenSize.height);
  
    // We do this even if the size didn't change, just to be sure everything is
    // in sync.
    this.realizeSize_(columnCount, rowCount);
    this.showZoomWarning_(this.scrollPort_.characterSize.zoomFactor != 1);
  
    //if (isNewSize)
    //  this.overlaySize();
  
    this.restyleCursor_();
    this.scheduleSyncCursorPosition_();
  };
  
  /**
   * Service the cursor blink timeout.
   */
  hterm.Terminal.prototype.onCursorBlink_ = function() {
    if (!this.options_.cursorBlink) {
      delete this.timeouts_.cursorBlink;
      return;
    }
  
    if (this.cursorNode_.getAttribute('focus') == 'false' ||
        this.cursorNode_.style.opacity == '0') {
      this.cursorNode_.style.opacity = '1';
      this.timeouts_.cursorBlink = setTimeout(this.myOnCursorBlink_,
                                              this.cursorBlinkCycle_[0]);
    } else {
      this.cursorNode_.style.opacity = '0';
      this.timeouts_.cursorBlink = setTimeout(this.myOnCursorBlink_,
                                              this.cursorBlinkCycle_[1]);
    }
  };
  
  /**
   * Set the scrollbar-visible mode bit.
   *
   * If scrollbar-visible is on, the vertical scrollbar will be visible.
   * Otherwise it will not.
   *
   * Defaults to on.
   *
   * @param {boolean} state True to set scrollbar-visible mode, false to unset.
   */
  hterm.Terminal.prototype.setScrollbarVisible = function(state) {
    this.scrollPort_.setScrollbarVisible(state);
  };
  
  /**
   * Set the scroll wheel move multiplier.  This will affect how fast the page
   * scrolls on mousewheel events.
   *
   * Defaults to 1.
   *
   * @param {number} multiplier.
   */
  hterm.Terminal.prototype.setScrollWheelMoveMultipler = function(multiplier) {
    this.scrollPort_.setScrollWheelMoveMultipler(multiplier);
  };
  
  /**
   * Close all web notifications created by terminal bells.
   */
  hterm.Terminal.prototype.closeBellNotifications_ = function() {
    this.bellNotificationList_.forEach(function(n) {
        n.close();
      });
    this.bellNotificationList_.length = 0;
  };
  // SOURCE FILE: hterm/js/hterm_terminal_io.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  lib.rtdep('lib.encodeUTF8');
  
  /**
   * Input/Output interface used by commands to communicate with the terminal.
   *
   * Commands like `nassh` and `crosh` receive an instance of this class as
   * part of their argv object.  This allows them to write to and read from the
   * terminal without exposing them to an entire hterm.Terminal instance.
   *
   * The active command must override the onVTKeystroke() and sendString() methods
   * of this class in order to receive keystrokes and send output to the correct
   * destination.
   *
   * Isolating commands from the terminal provides the following benefits:
   * - Provides a mechanism to save and restore onVTKeystroke and sendString
   *   handlers when invoking subcommands (see the push() and pop() methods).
   * - The isolation makes it easier to make changes in Terminal and supporting
   *   classes without affecting commands.
   * - In The Future commands may run in web workers where they would only be able
   *   to talk to a Terminal instance through an IPC mechanism.
   *
   * @param {hterm.Terminal}
   */
  hterm.Terminal.IO = function(terminal) {
    this.terminal_ = terminal;
  
    // The IO object to restore on IO.pop().
    this.previousIO_ = null;
  };
  
  /**
   * Show the terminal overlay for a given amount of time.
   *
   * The terminal overlay appears in inverse video in a large font, centered
   * over the terminal.  You should probably keep the overlay message brief,
   * since it's in a large font and you probably aren't going to check the size
   * of the terminal first.
   *
   * @param {string} msg The text (not HTML) message to display in the overlay.
   * @param {number} opt_timeout The amount of time to wait before fading out
   *     the overlay.  Defaults to 1.5 seconds.  Pass null to have the overlay
   *     stay up forever (or until the next overlay).
   */
  hterm.Terminal.IO.prototype.showOverlay = function(message, opt_timeout) {
    this.terminal_.showOverlay(message, opt_timeout);
  };
  
  /**
   * Open an frame in the current terminal window, pointed to the specified
   * url.
   *
   * Eventually we'll probably need size/position/decoration options.
   * The user should also be able to move/resize the frame.
   *
   * @param {string} url The URL to load in the frame.
   * @param {Object} opt_options Optional frame options.  Not implemented.
   */
  hterm.Terminal.IO.prototype.createFrame = function(url, opt_options) {
    return new hterm.Frame(this.terminal_, url, opt_options);
  };
  
  /**
   * Change the preference profile for the terminal.
   *
   * @param profileName {string} The name of the preference profile to activate.
   */
  hterm.Terminal.IO.prototype.setTerminalProfile = function(profileName) {
    this.terminal_.setProfile(profileName);
  };
  
  /**
   * Create a new hterm.Terminal.IO instance and make it active on the Terminal
   * object associated with this instance.
   *
   * This is used to pass control of the terminal IO off to a subcommand.  The
   * IO.pop() method can be used to restore control when the subcommand completes.
   */
  hterm.Terminal.IO.prototype.push = function() {
    var io = new hterm.Terminal.IO(this.terminal_);
    io.keyboardCaptured_ = this.keyboardCaptured_;
  
    io.columnCount = this.columnCount;
    io.rowCount = this.rowCount;
  
    io.previousIO_ = this.terminal_.io;
    this.terminal_.io = io;
  
    return io;
  };
  
  /**
   * Restore the Terminal's previous IO object.
   */
  hterm.Terminal.IO.prototype.pop = function() {
    this.terminal_.io = this.previousIO_;
  };
  
  /**
   * Called when data needs to be sent to the current command.
   *
   * Clients should override this to receive notification of pending data.
   *
   * @param {string} string The data to send.
   */
  hterm.Terminal.IO.prototype.sendString = function(string) {
    // Override this.
    console.log('Unhandled sendString: ' + string);
  };
  
  /**
   * Called when a terminal keystroke is detected.
   *
   * Clients should override this to receive notification of keystrokes.
   *
   * The keystroke data will be encoded according to the 'send-encoding'
   * preference.
   *
   * @param {string} string The VT key sequence.
   */
  hterm.Terminal.IO.prototype.onVTKeystroke = function(string) {
    // Override this.
    console.log('Unobserverd VT keystroke: ' + JSON.stringify(string));
  };
  
  hterm.Terminal.IO.prototype.onTerminalResize_ = function(width, height) {
    var obj = this;
    while (obj) {
      obj.columnCount = width;
      obj.rowCount = height;
      obj = obj.previousIO_;
    }
  
    this.onTerminalResize(width, height);
  };
  
  /**
   * Called when terminal size is changed.
   *
   * Clients should override this to receive notification of resize.
   *
   * @param {string|integer} terminal width.
   * @param {string|integer} terminal height.
   */
  hterm.Terminal.IO.prototype.onTerminalResize = function(width, height) {
    // Override this.
  };
  
  /**
   * Write a UTF-8 encoded byte string to the terminal.
   *
   * @param {string} string The UTF-8 encoded string to print.
   */
  hterm.Terminal.IO.prototype.writeUTF8 = function(string) {
    if (this.terminal_.io != this)
      throw 'Attempt to print from inactive IO object.';
  
    this.terminal_.interpret(string);
  };
  
  /**
   * Write a UTF-8 encoded byte string to the terminal followed by crlf.
   *
   * @param {string} string The UTF-8 encoded string to print.
   */
  hterm.Terminal.IO.prototype.writelnUTF8 = function(string) {
    if (this.terminal_.io != this)
      throw 'Attempt to print from inactive IO object.';
  
    this.terminal_.interpret(string + '\r\n');
  };
  
  /**
   * Write a UTF-16 JavaScript string to the terminal.
   *
   * @param {string} string The string to print.
   */
  hterm.Terminal.IO.prototype.print =
  hterm.Terminal.IO.prototype.writeUTF16 = function(string) {
    this.writeUTF8(lib.encodeUTF8(string));
  };
  
  /**
   * Print a UTF-16 JavaScript string to the terminal followed by a newline.
   *
   * @param {string} string The string to print.
   */
  hterm.Terminal.IO.prototype.println =
  hterm.Terminal.IO.prototype.writelnUTF16 = function(string) {
    this.writelnUTF8(lib.encodeUTF8(string));
  };
  // SOURCE FILE: hterm/js/hterm_text_attributes.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  lib.rtdep('lib.colors');
  
  /**
   * Constructor for TextAttribute objects.
   *
   * These objects manage a set of text attributes such as foreground/
   * background color, bold, faint, italic, blink, underline, and strikethrough.
   *
   * TextAttribute instances can be used to construct a DOM container implementing
   * the current attributes, or to test an existing DOM container for
   * compatibility with the current attributes.
   *
   * @constructor
   * @param {HTMLDocument} document The parent document to use when creating
   *     new DOM containers.
   */
  hterm.TextAttributes = function(document) {
    this.document_ = document;
    // These variables contain the source of the color as either:
    // SRC_DEFAULT  (use context default)
    // SRC_RGB      (specified in 'rgb( r, g, b)' form)
    // number       (representing the index from color palette to use)
    this.foregroundSource = this.SRC_DEFAULT;
    this.backgroundSource = this.SRC_DEFAULT;
  
    // These properties cache the value in the color table, but foregroundSource
    // and backgroundSource contain the canonical values.
    this.foreground = this.DEFAULT_COLOR;
    this.background = this.DEFAULT_COLOR;
  
    this.defaultForeground = 'rgb(255, 255, 255)';
    this.defaultBackground = 'rgb(0, 0, 0)';
  
    this.bold = false;
    this.faint = false;
    this.italic = false;
    this.blink = false;
    this.underline = false;
    this.strikethrough = false;
    this.inverse = false;
    this.invisible = false;
    this.wcNode = false;
    this.tileData = null;
  
    this.colorPalette = null;
    this.resetColorPalette();
  };
  
  /**
   * If false, we ignore the bold attribute.
   *
   * This is used for fonts that have a bold version that is a different size
   * than the normal weight version.
   */
  hterm.TextAttributes.prototype.enableBold = true;
  
  /**
   * If true, use bright colors (if available) for bold text.
   *
   * This setting is independent of the enableBold setting.
   */
  hterm.TextAttributes.prototype.enableBoldAsBright = true;
  
  /**
   * A sentinel constant meaning "whatever the default color is in this context".
   */
  hterm.TextAttributes.prototype.DEFAULT_COLOR = new String('');
  
  /**
   * A constant string used to specify that source color is context default.
   */
  hterm.TextAttributes.prototype.SRC_DEFAULT = 'default';
  
  
  /**
   * A constant string used to specify that the source of a color is a valid
   * rgb( r, g, b) specifier.
   */
  hterm.TextAttributes.prototype.SRC_RGB = 'rgb';
  
  /**
   * The document object which should own the DOM nodes created by this instance.
   *
   * @param {HTMLDocument} document The parent document.
   */
  hterm.TextAttributes.prototype.setDocument = function(document) {
    this.document_ = document;
  };
  
  /**
   * Create a deep copy of this object.
   *
   * @return {hterm.TextAttributes} A deep copy of this object.
   */
  hterm.TextAttributes.prototype.clone = function() {
    var rv = new hterm.TextAttributes(null);
  
    for (var key in this) {
      rv[key] = this[key];
    }
  
    rv.colorPalette = this.colorPalette.concat();
    return rv;
  };
  
  /**
   * Reset the current set of attributes.
   *
   * This does not affect the palette.  Use resetColorPalette() for that.
   * It also doesn't affect the tile data, it's not meant to.
   */
  hterm.TextAttributes.prototype.reset = function() {
    this.foregroundSource = this.SRC_DEFAULT;
    this.backgroundSource = this.SRC_DEFAULT;
    this.foreground = this.DEFAULT_COLOR;
    this.background = this.DEFAULT_COLOR;
    this.bold = false;
    this.faint = false;
    this.italic = false;
    this.blink = false;
    this.underline = false;
    this.strikethrough = false;
    this.inverse = false;
    this.invisible = false;
    this.wcNode = false;
  };
  
  /**
   * Reset the color palette to the default state.
   */
  hterm.TextAttributes.prototype.resetColorPalette = function() {
    this.colorPalette = lib.colors.colorPalette.concat();
    this.syncColors();
  };
  
  /**
   * Test if the current attributes describe unstyled text.
   *
   * @return {boolean} True if the current attributes describe unstyled text.
   */
  hterm.TextAttributes.prototype.isDefault = function() {
    return (this.foregroundSource == this.SRC_DEFAULT &&
            this.backgroundSource == this.SRC_DEFAULT &&
            !this.bold &&
            !this.faint &&
            !this.italic &&
            !this.blink &&
            !this.underline &&
            !this.strikethrough &&
            !this.inverse &&
            !this.invisible &&
            !this.wcNode &&
            this.tileData == null);
  };
  
  /**
   * Create a DOM container (a span or a text node) with a style to match the
   * current set of attributes.
   *
   * This method will create a plain text node if the text is unstyled, or
   * an HTML span if the text is styled.  Due to lack of monospace wide character
   * fonts on certain systems (e.g. Chrome OS), we need to put each wide character
   * in a span of CSS class '.wc-node' which has double column width.
   * Each vt_tiledata tile is also represented by a span with a single
   * character, with CSS classes '.tile' and '.tile_<glyph number>'.
   *
   * @param {string} opt_textContent Optional text content for the new container.
   * @return {HTMLNode} An HTML span or text nodes styled to match the current
   *     attributes.
   */
  hterm.TextAttributes.prototype.createContainer = function(opt_textContent) {
    if (this.isDefault())
      return this.document_.createTextNode(opt_textContent);
  
    var span = this.document_.createElement('span');
    var style = span.style;
  
    if (this.foreground != this.DEFAULT_COLOR)
      style.color = this.foreground;
  
    if (this.background != this.DEFAULT_COLOR)
      style.backgroundColor = this.background;
  
    if (this.enableBold && this.bold)
      style.fontWeight = 'bold';
  
    if (this.faint)
      span.faint = true;
  
    if (this.italic)
      style.fontStyle = 'italic';
  
    if (this.blink)
      style.fontStyle = 'italic';
  
    var textDecoration = '';
    if (this.underline) {
      textDecoration += ' underline';
      span.underline = true;
    }
    if (this.strikethrough) {
      textDecoration += ' line-through';
      span.strikethrough = true;
    }
    if (textDecoration) {
      style.textDecoration = textDecoration;
    }
  
    if (this.wcNode) {
      span.className = 'wc-node';
      span.wcNode = true;
    }
  
    if (this.tileData != null) {
      // This could be a wcNode too, so we add to the className here.
      span.className += ' tile tile_' + this.tileData;
      span.tileNode = true;
    }
  
    if (opt_textContent)
      span.textContent = opt_textContent;
  
    return span;
  };
  
  /**
   * Tests if the provided object (string, span or text node) has the same
   * style as this TextAttributes instance.
   *
   * This indicates that text with these attributes could be inserted directly
   * into the target DOM node.
   *
   * For the purposes of this method, a string is considered a text node.
   *
   * @param {string|HTMLNode} obj The object to test.
   * @return {boolean} True if the provided container has the same style as
   *     this attributes instance.
   */
  hterm.TextAttributes.prototype.matchesContainer = function(obj) {
    if (typeof obj == 'string' || obj.nodeType == 3)
      return this.isDefault();
  
    var style = obj.style;
  
    // We don't want to put multiple characters in a wcNode or a tile.
    // See the comments in createContainer.
    return (!(this.wcNode || obj.wcNode) &&
            !(this.tileData != null || obj.tileNode) &&
            this.foreground == style.color &&
            this.background == style.backgroundColor &&
            (this.enableBold && this.bold) == !!style.fontWeight &&
            (this.blink || this.italic) == !!style.fontStyle &&
            !!this.underline == !!obj.underline &&
            !!this.strikethrough == !!obj.strikethrough);
  };
  
  hterm.TextAttributes.prototype.setDefaults = function(foreground, background) {
    this.defaultForeground = foreground;
    this.defaultBackground = background;
  
    this.syncColors();
  };
  
  /**
   * Updates foreground and background properties based on current indices and
   * other state.
   *
   * @param {string} terminalForeground The terminal foreground color for use as
   *     inverse text background.
   * @param {string} terminalBackground The terminal background color for use as
   *     inverse text foreground.
   *
   */
  hterm.TextAttributes.prototype.syncColors = function() {
    function getBrightIndex(i) {
      if (i < 8) {
        // If the color is from the lower half of the ANSI 16, add 8.
        return i + 8;
      }
  
      // If it's not from the 16 color palette, ignore bold requests.  This
      // matches the behavior of gnome-terminal.
      return i;
    }
  
    var foregroundSource = this.foregroundSource;
    var backgroundSource = this.backgroundSource;
    var defaultForeground = this.DEFAULT_COLOR;
    var defaultBackground = this.DEFAULT_COLOR;
  
    if (this.inverse) {
      foregroundSource = this.backgroundSource;
      backgroundSource = this.foregroundSource;
      // We can't inherit the container's color anymore.
      defaultForeground = this.defaultBackground;
      defaultBackground = this.defaultForeground;
    }
  
    if (this.enableBoldAsBright && this.bold) {
      if (foregroundSource != this.SRC_DEFAULT &&
          foregroundSource != this.SRC_RGB) {
        foregroundSource = getBrightIndex(foregroundSource);
      }
    }
  
    if (this.invisible) {
      foregroundSource = backgroundSource;
      defaultForeground = this.defaultBackground;
    }
  
    // Set fore/background colors unless already specified in rgb(r, g, b) form.
    if (foregroundSource != this.SRC_RGB) {
      this.foreground = ((foregroundSource == this.SRC_DEFAULT) ?
                         defaultForeground : this.colorPalette[foregroundSource]);
    }
  
    if (this.faint && !this.invisible) {
      var colorToMakeFaint = ((this.foreground == this.DEFAULT_COLOR) ?
                              this.defaultForeground : this.foreground);
      this.foreground = lib.colors.mix(colorToMakeFaint, 'rgb(0, 0, 0)', 0.3333);
    }
  
    if (backgroundSource != this.SRC_RGB) {
      this.background = ((backgroundSource == this.SRC_DEFAULT) ?
                         defaultBackground : this.colorPalette[backgroundSource]);
    }
  };
  
  /**
   * Static method used to test if the provided objects (strings, spans or
   * text nodes) have the same style.
   *
   * For the purposes of this method, a string is considered a text node.
   *
   * @param {string|HTMLNode} obj1 An object to test.
   * @param {string|HTMLNode} obj2 Another object to test.
   * @return {boolean} True if the containers have the same style.
   */
  hterm.TextAttributes.containersMatch = function(obj1, obj2) {
    if (typeof obj1 == 'string')
      return hterm.TextAttributes.containerIsDefault(obj2);
  
    if (obj1.nodeType != obj2.nodeType)
      return false;
  
    if (obj1.nodeType == 3)
      return true;
  
    var style1 = obj1.style;
    var style2 = obj2.style;
  
    return (style1.color == style2.color &&
            style1.backgroundColor == style2.backgroundColor &&
            style1.fontWeight == style2.fontWeight &&
            style1.fontStyle == style2.fontStyle &&
            style1.textDecoration == style2.textDecoration);
  };
  
  /**
   * Static method to test if a given DOM container represents unstyled text.
   *
   * For the purposes of this method, a string is considered a text node.
   *
   * @param {string|HTMLNode} obj1 An object to test.
   * @return {boolean} True if the object is unstyled.
   */
  hterm.TextAttributes.containerIsDefault = function(obj) {
    return typeof obj == 'string'  || obj.nodeType == 3;
  };
  
  /**
   * Static method to get the column width of a node's textContent.
   *
   * @param {HTMLElement} node The HTML element to get the width of textContent
   *     from.
   * @return {integer} The column width of the node's textContent.
   */
  hterm.TextAttributes.nodeWidth = function(node) {
    if (node.wcNode) {
      return lib.wc.strWidth(node.textContent);
    } else {
      return node.textContent.length;
    }
  }
  
  /**
   * Static method to get the substr of a node's textContent.  The start index
   * and substr width are computed in column width.
   *
   * @param {HTMLElement} node The HTML element to get the substr of textContent
   *     from.
   * @param {integer} start The starting offset in column width.
   * @param {integer} width The width to capture in column width.
   * @return {integer} The extracted substr of the node's textContent.
   */
  hterm.TextAttributes.nodeSubstr = function(node, start, width) {
    if (node.wcNode) {
      return lib.wc.substr(node.textContent, start, width);
    } else {
      return node.textContent.substr(start, width);
    }
  }
  
  /**
   * Static method to get the substring based of a node's textContent.  The
   * start index of end index are computed in column width.
   *
   * @param {HTMLElement} node The HTML element to get the substr of textContent
   *     from.
   * @param {integer} start The starting offset in column width.
   * @param {integer} end The ending offset in column width.
   * @return {integer} The extracted substring of the node's textContent.
   */
  hterm.TextAttributes.nodeSubstring = function(node, start, end) {
    if (node.wcNode) {
      return lib.wc.substring(node.textContent, start, end);
    } else {
      return node.textContent.substring(start, end);
    }
  }
  
  /**
   * Static method to split a string into contiguous runs of single-width
   * characters and runs of double-width characters.
   *
   * @param {string} str The string to split.
   * @return {Array} An array of objects that contain substrings of str, where
   *     each substring is either a contiguous runs of single-width characters
   *     or a double-width character.  For object that contains a double-width
   *     character, its wcNode property is set to true.
   */
  hterm.TextAttributes.splitWidecharString = function(str) {
    var rv = [];
    var base = 0, length = 0;
  
    for (var i = 0; i < str.length;) {
      var c = str.codePointAt(i);
      var increment = (c <= 0xffff) ? 1 : 2;
      if (c < 128 || lib.wc.charWidth(c) == 1) {
        length += increment;
      } else {
        if (length) {
          rv.push({str: str.substr(base, length)});
        }
        rv.push({str: str.substr(i, increment), wcNode: true});
        base = i + increment;
        length = 0;
      }
      i += increment;
    }
  
    if (length)
      rv.push({str: str.substr(base, length)});
  
    return rv;
  }
  // SOURCE FILE: hterm/js/hterm_vt.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  lib.rtdep('lib.colors', 'lib.f', 'lib.UTF8Decoder',
            'hterm.VT.CharacterMap');
  
  /**
   * Constructor for the VT escape sequence interpreter.
   *
   * The interpreter operates on a terminal object capable of performing cursor
   * move operations, painting characters, etc.
   *
   * This interpreter is intended to be compatible with xterm, though it
   * ignores some of the more esoteric escape sequences.
   *
   * Some sequences are marked "Will not implement", meaning that they aren't
   * considered relevant to hterm and will probably never be implemented.
   *
   * Others are marked "Not currently implemented", meaning that they are lower
   * priority items that may be useful to implement at some point.
   *
   * See also:
   *   [VT100] VT100 User Guide
   *           http://vt100.net/docs/vt100-ug/chapter3.html
   *   [VT510] VT510 Video Terminal Programmer Information
   *           http://vt100.net/docs/vt510-rm/contents
   *   [XTERM] Xterm Control Sequences
   *           http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
   *   [CTRL]  Wikipedia: C0 and C1 Control Codes
   *           http://en.wikipedia.org/wiki/C0_and_C1_control_codes
   *   [CSI]   Wikipedia: ANSI Escape Code
   *           http://en.wikipedia.org/wiki/Control_Sequence_Introducer
   *   man 5 terminfo, man infocmp, infocmp -L xterm-new
   *
   * @param {hterm.Terminal} terminal Terminal to use with the interpreter.
   */
  hterm.VT = function(terminal) {
    /**
     * The display terminal object associated with this virtual terminal.
     */
    this.terminal = terminal;
  
    terminal.onMouse = this.onTerminalMouse_.bind(this);
    this.mouseReport = this.MOUSE_REPORT_DISABLED;
  
    // Parse state left over from the last parse.  You should use the parseState
    // instance passed into your parse routine, rather than reading
    // this.parseState_ directly.
    this.parseState_ = new hterm.VT.ParseState(this.parseUnknown_);
  
    // Any "leading modifiers" for the escape sequence, such as '?', ' ', or the
    // other modifiers handled in this.parseCSI_.
    this.leadingModifier_ = '';
  
    // Any "trailing modifiers".  Same character set as a leading modifier,
    // except these are found after the numeric arguments.
    this.trailingModifier_ = '';
  
    // Whether or not to respect the escape codes for setting terminal width.
    this.allowColumnWidthChanges_ = false;
  
    // The amount of time we're willing to wait for the end of an OSC sequence.
    this.oscTimeLimit_ = 20000;
  
    // Construct a regular expression to match the known one-byte control chars.
    // This is used in parseUnknown_ to quickly scan a string for the next
    // control character.
    var cc1 = Object.keys(hterm.VT.CC1).map(
        function(e) {
          return '\\x' + lib.f.zpad(e.charCodeAt().toString(16), 2)
        }).join('');
    this.cc1Pattern_ = new RegExp('[' + cc1 + ']');
  
    // Decoder to maintain UTF-8 decode state.
    this.utf8Decoder_ = new lib.UTF8Decoder();
  
    /**
     * Whether to accept the 8-bit control characters.
     *
     * An 8-bit control character is one with the eighth bit set.  These
     * didn't work on 7-bit terminals so they all have two byte equivalents.
     * Most hosts still only use the two-byte versions.
     *
     * We ignore 8-bit control codes by default.  This is in order to avoid
     * issues with "accidental" usage of codes that need to be terminated.
     * The "accident" usually involves cat'ing binary data.
     */
    this.enable8BitControl = false;
  
    /**
     * Whether to allow the OSC 52 sequence to write to the system clipboard.
     */
    this.enableClipboardWrite = true;
  
    /**
     * Respect the host's attempt to change the cursor blink status using
     * the DEC Private mode 12.
     */
    this.enableDec12 = false;
  
    /**
     * The expected encoding method for data received from the host.
     */
    this.characterEncoding = 'utf-8';
  
    /**
     * Max length of an unterminated DCS, OSC, PM or APC sequence before we give
     * up and ignore the code.
     *
     * These all end with a String Terminator (ST, '\x9c', ESC '\\') or
     * (BEL, '\x07') character, hence the "string sequence" moniker.
     */
    this.maxStringSequence = 1024;
  
    /**
     * If true, emit warnings when we encounter a control character or escape
     * sequence that we don't recognize or explicitly ignore.
     */
    this.warnUnimplemented = true;
  
    /**
     * The default G0...G3 character maps.
     */
    this.G0 = hterm.VT.CharacterMap.maps['B'];
    this.G1 = hterm.VT.CharacterMap.maps['0'];
    this.G2 = hterm.VT.CharacterMap.maps['B'];
    this.G3 = hterm.VT.CharacterMap.maps['B'];
  
    /**
     * The 7-bit visible character set.
     *
     * This is a mapping from inbound data to display glyph.  The GL set
     * contains the 94 bytes from 0x21 to 0x7e.
     *
     * The default GL set is 'B', US ASCII.
     */
    this.GL = 'G0';
  
    /**
     * The 8-bit visible character set.
     *
     * This is a mapping from inbound data to display glyph.  The GR set
     * contains the 94 bytes from 0xa1 to 0xfe.
     */
    this.GR = 'G0';
  
    // Saved state used in DECSC.
    //
    // This is a place to store a copy VT state, it is *not* the active state.
    this.savedState_ = new hterm.VT.CursorState(this);
  };
  
  /**
   * No mouse events.
   */
  hterm.VT.prototype.MOUSE_REPORT_DISABLED = 0;
  
  /**
   * DECSET mode 1000.
   *
   * Report mouse down/up events only.
   */
  hterm.VT.prototype.MOUSE_REPORT_CLICK = 1;
  
  /**
   * DECSET mode 1002.
   *
   * Report mouse down/up and movement while a button is down.
   */
  hterm.VT.prototype.MOUSE_REPORT_DRAG = 3;
  
  /**
   * ParseState constructor.
   *
   * This object tracks the current state of the parse.  It has fields for the
   * current buffer, position in the buffer, and the parse function.
   *
   * @param {function} defaultFunc The default parser function.
   * @param {string} opt_buf Optional string to use as the current buffer.
   */
  hterm.VT.ParseState = function(defaultFunction, opt_buf) {
    this.defaultFunction = defaultFunction;
    this.buf = opt_buf || null;
    this.pos = 0;
    this.func = defaultFunction;
    this.args = [];
  };
  
  /**
   * Reset the parser function, buffer, and position.
   */
  hterm.VT.ParseState.prototype.reset = function(opt_buf) {
    this.resetParseFunction();
    this.resetBuf(opt_buf || '');
    this.resetArguments();
  };
  
  /**
   * Reset the parser function only.
   */
  hterm.VT.ParseState.prototype.resetParseFunction = function() {
    this.func = this.defaultFunction;
  };
  
  /**
   * Reset the buffer and position only.
   *
   * @param {string} buf Optional new value for buf, defaults to null.
   */
  hterm.VT.ParseState.prototype.resetBuf = function(opt_buf) {
    this.buf = (typeof opt_buf == 'string') ? opt_buf : null;
    this.pos = 0;
  };
  
  /**
   * Reset the arguments list only.
   *
   * @param {string} opt_arg_zero Optional initial value for args[0].
   */
  hterm.VT.ParseState.prototype.resetArguments = function(opt_arg_zero) {
    this.args.length = 0;
    if (typeof opt_arg_zero != 'undefined')
      this.args[0] = opt_arg_zero;
  };
  
  /**
   * Get an argument as an integer.
   *
   * @param {number} argnum The argument number to retreive.
   */
  hterm.VT.ParseState.prototype.iarg = function(argnum, defaultValue) {
    var str = this.args[argnum];
    if (str) {
      var ret = parseInt(str, 10);
      // An argument of zero is treated as the default value.
      if (ret == 0)
        ret = defaultValue;
      return ret;
    }
    return defaultValue;
  };
  
  /**
   * Advance the parse postion.
   *
   * @param {integer} count The number of bytes to advance.
   */
  hterm.VT.ParseState.prototype.advance = function(count) {
    this.pos += count;
  };
  
  /**
   * Return the remaining portion of the buffer without affecting the parse
   * position.
   *
   * @return {string} The remaining portion of the buffer.
   */
  hterm.VT.ParseState.prototype.peekRemainingBuf = function() {
    return this.buf.substr(this.pos);
  };
  
  /**
   * Return the next single character in the buffer without affecting the parse
   * position.
   *
   * @return {string} The next character in the buffer.
   */
  hterm.VT.ParseState.prototype.peekChar = function() {
    return this.buf.substr(this.pos, 1);
  };
  
  /**
   * Return the next single character in the buffer and advance the parse
   * position one byte.
   *
   * @return {string} The next character in the buffer.
   */
  hterm.VT.ParseState.prototype.consumeChar = function() {
    return this.buf.substr(this.pos++, 1);
  };
  
  /**
   * Return true if the buffer is empty, or the position is past the end.
   */
  hterm.VT.ParseState.prototype.isComplete = function() {
    return this.buf == null || this.buf.length <= this.pos;
  };
  
  hterm.VT.CursorState = function(vt) {
    this.vt_ = vt;
    this.save();
  };
  
  hterm.VT.CursorState.prototype.save = function() {
    this.cursor = this.vt_.terminal.saveCursor();
  
    this.textAttributes = this.vt_.terminal.getTextAttributes().clone();
  
    this.GL = this.vt_.GL;
    this.GR = this.vt_.GR;
  
    this.G0 = this.vt_.G0;
    this.G1 = this.vt_.G1;
    this.G2 = this.vt_.G2;
    this.G3 = this.vt_.G3;
  };
  
  hterm.VT.CursorState.prototype.restore = function() {
    this.vt_.terminal.restoreCursor(this.cursor);
  
    this.vt_.terminal.setTextAttributes(this.textAttributes.clone());
  
    this.vt_.GL = this.GL;
    this.vt_.GR = this.GR;
  
    this.vt_.G0 = this.G0;
    this.vt_.G1 = this.G1;
    this.vt_.G2 = this.G2;
    this.vt_.G3 = this.G3;
  };
  
  hterm.VT.prototype.reset = function() {
    this.G0 = hterm.VT.CharacterMap.maps['B'];
    this.G1 = hterm.VT.CharacterMap.maps['0'];
    this.G2 = hterm.VT.CharacterMap.maps['B'];
    this.G3 = hterm.VT.CharacterMap.maps['B'];
  
    this.GL = 'G0';
    this.GR = 'G0';
  
    this.savedState_ = new hterm.VT.CursorState(this);
  
    this.mouseReport = this.MOUSE_REPORT_DISABLED;
  };
  
  /**
   * Handle terminal mouse events.
   *
   * See the "Mouse Tracking" section of [xterm].
   */
  hterm.VT.prototype.onTerminalMouse_ = function(e) {
    if (this.mouseReport == this.MOUSE_REPORT_DISABLED)
      return;
  
    // Temporary storage for our response.
    var response;
  
    // Modifier key state.
    var mod = 0;
    if (e.shiftKey)
      mod |= 4;
    if (e.metaKey || (this.terminal.keyboard.altIsMeta && e.altKey))
      mod |= 8;
    if (e.ctrlKey)
      mod |= 16;
  
    // TODO(rginda): We should also support mode 1005 and/or 1006 to extend the
    // coordinate space.  Though, after poking around just a little, I wasn't
    // able to get vi or emacs to use either of these modes.
    var x = String.fromCharCode(lib.f.clamp(e.terminalColumn + 32, 32, 255));
    var y = String.fromCharCode(lib.f.clamp(e.terminalRow + 32, 32, 255));
  
    switch (e.type) {
      case 'mousewheel':
        // Mouse wheel is treated as button 1 or 2 plus an additional 64.
        b = ((e.wheelDeltaY > 0) ? 0 : 1) + 96;
        b |= mod;
        response = '\x1b[M' + String.fromCharCode(b) + x + y;
  
        // Keep the terminal from scrolling.
        e.preventDefault();
        break;
  
      case 'mousedown':
        // Buttons are encoded as button number plus 32.
        var b = Math.min(e.which - 1, 2) + 32;
  
        // And mix in the modifier keys.
        b |= mod;
  
        response = '\x1b[M' + String.fromCharCode(b) + x + y;
        break;
  
      case 'mouseup':
        // Mouse up has no indication of which button was released.
        response = '\x1b[M\x23' + x + y;
        break;
  
      case 'mousemove':
        if (this.mouseReport == this.MOUSE_REPORT_DRAG && e.which) {
          // Standard button bits.
          b = 32 + Math.min(e.which - 1, 2);
  
          // Add 32 to indicate mouse motion.
          b += 32;
  
          // And mix in the modifier keys.
          b |= mod;
  
          response = '\x1b[M' + String.fromCharCode(b) + x + y;
        }
  
        break;
  
      case 'click':
      case 'dblclick':
        break;
  
      default:
        console.error('Unknown mouse event: ' + e.type, e);
        break;
    }
  
    if (response)
      this.terminal.io.sendString(response);
  };
  
  /**
   * Interpret a string of characters, displaying the results on the associated
   * terminal object.
   *
   * The buffer will be decoded according to the 'receive-encoding' preference.
   */
  hterm.VT.prototype.interpret = function(buf) {
    this.parseState_.resetBuf(this.decode(buf));
  
    while (!this.parseState_.isComplete()) {
      var func = this.parseState_.func;
      var pos = this.parseState_.pos;
      var buf = this.parseState_.buf;
  
      this.parseState_.func.call(this, this.parseState_);
  
      if (this.parseState_.func == func && this.parseState_.pos == pos &&
          this.parseState_.buf == buf) {
        throw 'Parser did not alter the state!';
      }
    }
  };
  
  /**
   * Decode a string according to the 'receive-encoding' preference.
   */
  hterm.VT.prototype.decode = function(str) {
    if (this.characterEncoding == 'utf-8')
      return this.decodeUTF8(str);
  
    return str;
  };
  
  /**
   * Encode a UTF-16 string as UTF-8.
   *
   * See also: http://en.wikipedia.org/wiki/UTF-16
   */
  hterm.VT.prototype.encodeUTF8 = function(str) {
    return lib.encodeUTF8(str);
  };
  
  /**
   * Decode a UTF-8 string into UTF-16.
   */
  hterm.VT.prototype.decodeUTF8 = function(str) {
    return this.utf8Decoder_.decode(str);
  };
  
  /**
   * The default parse function.
   *
   * This will scan the string for the first 1-byte control character (C0/C1
   * characters from [CTRL]).  Any plain text coming before the code will be
   * printed to the terminal, then the control character will be dispatched.
   */
  hterm.VT.prototype.parseUnknown_ = function(parseState) {
    var self = this;
  
    function print(str) {
      if (self[self.GL].GL)
        str = self[self.GL].GL(str);
  
      if (self[self.GR].GR)
        str = self[self.GR].GR(str);
  
      self.terminal.print(str);
    };
  
    // Search for the next contiguous block of plain text.
    var buf = parseState.peekRemainingBuf();
    var nextControl = buf.search(this.cc1Pattern_);
  
    if (nextControl == 0) {
      // We've stumbled right into a control character.
      this.dispatch('CC1', buf.substr(0, 1), parseState);
      parseState.advance(1);
      return;
    }
  
    if (nextControl == -1) {
      // There are no control characters in this string.
      print(buf);
      parseState.reset();
      return;
    }
  
    print(buf.substr(0, nextControl));
    this.dispatch('CC1', buf.substr(nextControl, 1), parseState);
    parseState.advance(nextControl + 1);
  };
  
  /**
   * Parse a Control Sequence Introducer code and dispatch it.
   *
   * See [CSI] for some useful information about these codes.
   */
  hterm.VT.prototype.parseCSI_ = function(parseState) {
    var ch = parseState.peekChar();
    var args = parseState.args;
  
    if (ch >= '@' && ch <= '~') {
      // This is the final character.
      this.dispatch('CSI', this.leadingModifier_ + this.trailingModifier_ + ch,
                    parseState);
      parseState.resetParseFunction();
  
    } else if (ch == ';') {
      // Parameter delimeter.
      if (this.trailingModifier_) {
        // Parameter delimiter after the trailing modifier.  That's a paddlin'.
        parseState.resetParseFunction();
  
      } else {
        if (!args.length) {
          // They omitted the first param, we need to supply it.
          args.push('');
        }
  
        args.push('');
      }
  
    } else if (ch >= '0' && ch <= '9') {
      // Next byte in the current parameter.
  
      if (this.trailingModifier_) {
        // Numeric parameter after the trailing modifier.  That's a paddlin'.
        parseState.resetParseFunction();
      } else {
        if (!args.length) {
          args[0] = ch;
        } else {
          args[args.length - 1] += ch;
        }
      }
  
    } else if (ch >= ' ' && ch <= '?' && ch != ':') {
      // Modifier character.
      if (!args.length) {
        this.leadingModifier_ += ch;
      } else {
        this.trailingModifier_ += ch;
      }
  
    } else if (this.cc1Pattern_.test(ch)) {
      // Control character.
      this.dispatch('CC1', ch, parseState);
  
    } else {
      // Unexpected character in sequence, bail out.
      parseState.resetParseFunction();
    }
  
    parseState.advance(1);
  };
  
  /**
   * Skip over the string until the next String Terminator (ST, 'ESC \') or
   * Bell (BEL, '\x07').
   *
   * The string is accumulated in parseState.args[0].  Make sure to reset the
   * arguments (with parseState.resetArguments) before starting the parse.
   *
   * You can detect that parsing in complete by checking that the parse
   * function has changed back to the default parse function.
   *
   * If we encounter more than maxStringSequence characters, we send back
   * the unterminated sequence to be re-parsed with the default parser function.
   *
   * @return {boolean} If true, parsing is ongoing or complete.  If false, we've
   *     exceeded the max string sequence.
   */
  hterm.VT.prototype.parseUntilStringTerminator_ = function(parseState) {
    var buf = parseState.peekRemainingBuf();
    var nextTerminator = buf.search(/(\x1b\\|\x07)/);
    var args = parseState.args;
  
    if (!args.length) {
      args[0] = '';
      args[1] = new Date();
    }
  
    if (nextTerminator == -1) {
      // No terminator here, have to wait for the next string.
  
      args[0] += buf;
  
      var abortReason;
  
      if (args[0].length > this.maxStringSequence)
        abortReason = 'too long: ' + args[0].length;
  
      if (args[0].indexOf('\x1b') != -1)
        abortReason = 'embedded escape: ' + args[0].indexOf('\x1b');
  
      if (new Date() - args[1] > this.oscTimeLimit_)
        abortReason = 'timeout expired: ' + new Date() - args[1];
  
      if (abortReason) {
        console.log('parseUntilStringTerminator_: aborting: ' + abortReason,
                    args[0]);
        parseState.reset(args[0]);
        return false;
      }
  
      parseState.advance(buf.length);
      return true;
    }
  
    if (args[0].length + nextTerminator > this.maxStringSequence) {
      // We found the end of the sequence, but we still think it's too long.
      parseState.reset(args[0] + buf);
      return false;
    }
  
    args[0] += buf.substr(0, nextTerminator);
  
    parseState.resetParseFunction();
    parseState.advance(nextTerminator +
                       (buf.substr(nextTerminator, 1) == '\x1b' ? 2 : 1));
  
    return true;
  };
  
  /**
   * Dispatch to the function that handles a given CC1, ESC, or CSI or VT52 code.
   */
  hterm.VT.prototype.dispatch = function(type, code, parseState) {
    var handler = hterm.VT[type][code];
    if (!handler) {
      if (this.warnUnimplemented)
        console.warn('Unknown ' + type + ' code: ' + JSON.stringify(code));
      return;
    }
  
    if (handler == hterm.VT.ignore) {
      if (this.warnUnimplemented)
        console.warn('Ignored ' + type + ' code: ' + JSON.stringify(code));
      return;
    }
  
    if (type == 'CC1' && code > '\x7f' && !this.enable8BitControl) {
      // It's kind of a hack to put this here, but...
      //
      // If we're dispatching a 'CC1' code, and it's got the eighth bit set,
      // but we're not supposed to handle 8-bit codes?  Just ignore it.
      //
      // This prevents an errant (DCS, '\x90'), (OSC, '\x9d'), (PM, '\x9e') or
      // (APC, '\x9f') from locking up the terminal waiting for its expected
      // (ST, '\x9c') or (BEL, '\x07').
      console.warn('Ignoring 8-bit control code: 0x' +
                   code.charCodeAt(0).toString(16));
      return;
    }
  
    handler.apply(this, [parseState, code]);
  };
  
  /**
   * Set one of the ANSI defined terminal mode bits.
   *
   * Invoked in response to SM/RM.
   *
   * Expected values for code:
   *   2 - Keyboard Action Mode (AM).  Will not implement.
   *   4 - Insert Mode (IRM).
   *   12 - Send/receive (SRM).  Will not implement.
   *   20 - Automatic Newline (LNM).
   *
   * Unexpected and unimplemented values are silently ignored.
   */
  hterm.VT.prototype.setANSIMode = function(code, state) {
    if (code == '4') {
      this.terminal.setInsertMode(state);
    } else if (code == '20') {
      this.terminal.setAutoCarriageReturn(state);
    } else if (this.warnUnimplemented) {
      console.warn('Unimplemented ANSI Mode: ' + code);
    }
  };
  
  /**
   * Set or reset one of the DEC Private modes.
   *
   * Invoked in response to DECSET/DECRST.
   *
   * Expected values for code:
   *      1 - Application Cursor Keys (DECCKM).
   *      2 - [!] Designate USASCII for character sets G0-G3 (DECANM), and set
   *          VT100 mode.
   *      3 - 132 Column Mode (DECCOLM).
   *      4 - [x] Smooth (Slow) Scroll (DECSCLM).
   *      5 - Reverse Video (DECSCNM).
   *      6 - Origin Mode (DECOM).
   *      7 - Wraparound Mode (DECAWM).
   *      8 - [x] Auto-repeat Keys (DECARM).
   *      9 - [!] Send Mouse X & Y on button press.
   *     10 - [x] Show toolbar (rxvt).
   *     12 - Start Blinking Cursor (att610).
   *     18 - [!] Print form feed (DECPFF).
   *     19 - [x] Set print extent to full screen (DECPEX).
   *     25 - Show Cursor (DECTCEM).
   *     30 - [!] Show scrollbar (rxvt).
   *     35 - [x] Enable font-shifting functions (rxvt).
   *     38 - [x] Enter Tektronix Mode (DECTEK).
   *     40 - Allow 80 - 132 Mode.
   *     41 - [!] more(1) fix (see curses resource).
   *     42 - [!] Enable Nation Replacement Character sets (DECNRCM).
   *     44 - [!] Turn On Margin Bell.
   *     45 - Reverse-wraparound Mode.
   *     46 - [x] Start Logging.
   *     47 - [!] Use Alternate Screen Buffer.
   *     66 - [!] Application keypad (DECNKM).
   *     67 - Backarrow key sends backspace (DECBKM).
   *   1000 - Send Mouse X & Y on button press and release.  (MOUSE_REPORT_CLICK)
   *   1001 - [!] Use Hilite Mouse Tracking.
   *   1002 - Use Cell Motion Mouse Tracking.  (MOUSE_REPORT_DRAG)
   *   1003 - [!] Use All Motion Mouse Tracking.
   *   1004 - [!] Send FocusIn/FocusOut events.
   *   1005 - [!] Enable Extended Mouse Mode.
   *   1010 - Scroll to bottom on tty output (rxvt).
   *   1011 - Scroll to bottom on key press (rxvt).
   *   1034 - [x] Interpret "meta" key, sets eighth bit.
   *   1035 - [x] Enable special modifiers for Alt and NumLock keys.
   *   1036 - Send ESC when Meta modifies a key.
   *   1037 - [!] Send DEL from the editing-keypad Delete key.
   *   1039 - Send ESC when Alt modifies a key.
   *   1040 - [x] Keep selection even if not highlighted.
   *   1041 - [x] Use the CLIPBOARD selection.
   *   1042 - [!] Enable Urgency window manager hint when Control-G is received.
   *   1043 - [!] Enable raising of the window when Control-G is received.
   *   1047 - [!] Use Alternate Screen Buffer.
   *   1048 - Save cursor as in DECSC.
   *   1049 - Save cursor as in DECSC and use Alternate Screen Buffer, clearing
   *          it first. (This may be disabled by the titeInhibit resource). This
   *          combines the effects of the 1047 and 1048 modes. Use this with
   *          terminfo-based applications rather than the 47 mode.
   *   1050 - [!] Set terminfo/termcap function-key mode.
   *   1051 - [x] Set Sun function-key mode.
   *   1052 - [x] Set HP function-key mode.
   *   1053 - [x] Set SCO function-key mode.
   *   1060 - [x] Set legacy keyboard emulation (X11R6).
   *   1061 - [!] Set VT220 keyboard emulation.
   *   2004 - Set bracketed paste mode.
   *
   * [!] - Not currently implemented, may be in the future.
   * [x] - Will not implement.
   */
  hterm.VT.prototype.setDECMode = function(code, state) {
    switch (code) {
      case '1':  // DECCKM
        this.terminal.keyboard.applicationCursor = state;
        break;
  
      case '3':  // DECCOLM
        if (this.allowColumnWidthChanges_) {
          this.terminal.setWidth(state ? 132 : 80);
  
          this.terminal.clearHome();
          this.terminal.setVTScrollRegion(null, null);
        }
        break;
  
      case '5':  // DECSCNM
        this.terminal.setReverseVideo(state);
        break;
  
      case '6':  // DECOM
        this.terminal.setOriginMode(state);
        break;
  
      case '7':  // DECAWM
        this.terminal.setWraparound(state);
        break;
  
      case '12':  // att610
        if (this.enableDec12)
          this.terminal.setCursorBlink(state);
        break;
  
      case '25':  // DECTCEM
        this.terminal.setCursorVisible(state);
        break;
  
      case '40':  // no-spec
        this.terminal.allowColumnWidthChanges_ = state;
        break;
  
      case '45':  // no-spec
        this.terminal.setReverseWraparound(state);
        break;
  
      case '67':  // DECBKM
        this.terminal.keyboard.backspaceSendsBackspace = state;
        break;
  
      case '1000':  // Report on mouse clicks only.
        this.mouseReport = (
            state ? this.MOUSE_REPORT_CLICK : this.MOUSE_REPORT_DISABLED);
        break;
  
      case '1002':  // Report on mouse clicks and drags
        this.mouseReport = (
            state ? this.MOUSE_REPORT_DRAG : this.MOUSE_REPORT_DISABLED);
        break;
  
      case '1010':  // rxvt
        this.terminal.scrollOnOutput = state;
        break;
  
      case '1011':  // rxvt
        this.terminal.scrollOnKeystroke = state;
        break;
  
      case '1036':  // no-spec
        this.terminal.keyboard.metaSendsEscape = state;
        break;
  
      case '1039':  // no-spec
        if (state) {
          if (!this.terminal.keyboard.previousAltSendsWhat_) {
            this.terminal.keyboard.previousAltSendsWhat_ =
                this.terminal.keyboard.altSendsWhat;
            this.terminal.keyboard.altSendsWhat = 'escape';
          }
        } else if (this.terminal.keyboard.previousAltSendsWhat_) {
          this.terminal.keyboard.altSendsWhat =
              this.terminal.keyboard.previousAltSendsWhat_;
          this.terminal.keyboard.previousAltSendsWhat_ = null;
        }
        break;
  
      case '47':
      case '1047':  // no-spec
        this.terminal.setAlternateMode(state);
        break;
  
      case '1048':  // Save cursor as in DECSC.
        this.savedState_.save();
  
      case '1049':  // 1047 + 1048 + clear.
        if (state) {
          this.savedState_.save();
          this.terminal.setAlternateMode(state);
          this.terminal.clear();
        } else {
          this.terminal.setAlternateMode(state);
          this.savedState_.restore();
        }
  
        break;
  
      case '2004':  // Bracketed paste mode.
        this.terminal.setBracketedPaste(state);
        break;
  
      default:
        if (this.warnUnimplemented)
          console.warn('Unimplemented DEC Private Mode: ' + code);
        break;
    }
  };
  
  /**
   * Function shared by control characters and escape sequences that are
   * ignored.
   */
  hterm.VT.ignore = function() {};
  
  /**
   * Collection of control characters expressed in a single byte.
   *
   * This includes the characters from the C0 and C1 sets (see [CTRL]) that we
   * care about.  Two byte versions of the C1 codes are defined in the
   * hterm.VT.ESC collection.
   *
   * The 'CC1' mnemonic here refers to the fact that these are one-byte Control
   * Codes.  It's only used in this source file and not defined in any of the
   * referenced documents.
   */
  hterm.VT.CC1 = {};
  
  /**
   * Collection of two-byte and three-byte sequences starting with ESC.
   */
  hterm.VT.ESC = {};
  
  /**
   * Collection of CSI (Control Sequence Introducer) sequences.
   *
   * These sequences begin with 'ESC [', and may take zero or more arguments.
   */
  hterm.VT.CSI = {};
  
  /**
   * Collection of OSC (Operating System Control) sequences.
   *
   * These sequences begin with 'ESC ]', followed by a function number and a
   * string terminated by either ST or BEL.
   */
  hterm.VT.OSC = {};
  
  /**
   * Collection of VT52 sequences.
   *
   * When in VT52 mode, other sequences are disabled.
   */
  hterm.VT.VT52 = {};
  
  /**
   * Null (NUL).
   *
   * Silently ignored.
   */
  hterm.VT.CC1['\x00'] = function () {};
  
  /**
   * Enquiry (ENQ).
   *
   * Transmit answerback message.
   *
   * The default answerback message in xterm is an empty string, so we just
   * ignore this.
   */
  hterm.VT.CC1['\x05'] = hterm.VT.ignore;
  
  /**
   * Ring Bell (BEL).
   */
  hterm.VT.CC1['\x07'] = function() {
    this.terminal.ringBell();
  };
  
  /**
   * Backspace (BS).
   *
   * Move the cursor to the left one character position, unless it is at the
   * left margin, in which case no action occurs.
   */
  hterm.VT.CC1['\x08'] = function() {
    this.terminal.cursorLeft(1);
  };
  
  /**
   * Horizontal Tab (HT).
   *
   * Move the cursor to the next tab stop, or to the right margin if no further
   * tab stops are present on the line.
   */
  hterm.VT.CC1['\x09'] = function() {
    this.terminal.forwardTabStop();
  };
  
  /**
   * Line Feed (LF).
   *
   * This code causes a line feed or a new line operation.  See Automatic
   * Newline (LNM).
   */
  hterm.VT.CC1['\x0a'] = function() {
    this.terminal.formFeed();
  };
  
  /**
   * Vertical Tab (VT).
   *
   * Interpreted as LF.
   */
  hterm.VT.CC1['\x0b'] = hterm.VT.CC1['\x0a'];
  
  /**
   * Form Feed (FF).
   *
   * Interpreted as LF.
   */
  hterm.VT.CC1['\x0c'] = function() {
    this.terminal.formFeed();
  };
  
  /**
   * Carriage Return (CR).
   *
   * Move cursor to the left margin on the current line.
   */
  hterm.VT.CC1['\x0d'] = function() {
    this.terminal.setCursorColumn(0);
  };
  
  /**
   * Shift Out (SO), aka Lock Shift 0 (LS1).
   *
   * Invoke G1 character set in GL.
   */
  hterm.VT.CC1['\x0e'] = function() {
    this.GL = 'G1';
  };
  
  /**
   * Shift In (SI), aka Lock Shift 0 (LS0).
   *
   * Invoke G0 character set in GL.
   */
  hterm.VT.CC1['\x0f'] = function() {
    this.GL = 'G0';
  };
  
  /**
   * Transmit On (XON).
   *
   * Not currently implemented.
   *
   * TODO(rginda): Implement?
   */
  hterm.VT.CC1['\x11'] = hterm.VT.ignore;
  
  /**
   * Transmit Off (XOFF).
   *
   * Not currently implemented.
   *
   * TODO(rginda): Implement?
   */
  hterm.VT.CC1['\x13'] = hterm.VT.ignore;
  
  /**
   * Cancel (CAN).
   *
   * If sent during a control sequence, the sequence is immediately terminated
   * and not executed.
   *
   * It also causes the error character to be displayed.
   */
  hterm.VT.CC1['\x18'] = function(parseState) {
    // If we've shifted in the G1 character set, shift it back out to
    // the default character set.
    if (this.GL == 'G1') {
      this.GL = 'G0';
    }
    parseState.resetParseFunction();
    this.terminal.print('?');
  };
  
  /**
   * Substitute (SUB).
   *
   * Interpreted as CAN.
   */
  hterm.VT.CC1['\x1a'] = hterm.VT.CC1['\x18'];
  
  /**
   * Escape (ESC).
   */
  hterm.VT.CC1['\x1b'] = function(parseState) {
    function parseESC(parseState) {
      var ch = parseState.consumeChar();
  
      if (ch == '\x1b')
        return;
  
      this.dispatch('ESC', ch, parseState);
  
      if (parseState.func == parseESC)
        parseState.resetParseFunction();
    };
  
    parseState.func = parseESC;
  };
  
  /**
   * Delete (DEL).
   */
  hterm.VT.CC1['\x7f'] = hterm.VT.ignore;
  
  // 8 bit control characters and their two byte equivalents, below...
  
  /**
   * Index (IND).
   *
   * Like newline, only keep the X position
   */
  hterm.VT.CC1['\x84'] =
  hterm.VT.ESC['D'] = function() {
    this.terminal.lineFeed();
  };
  
  /**
   * Next Line (NEL).
   *
   * Like newline, but doesn't add lines.
   */
  hterm.VT.CC1['\x85'] =
  hterm.VT.ESC['E'] = function() {
    this.terminal.setCursorColumn(0);
    this.terminal.cursorDown(1);
  };
  
  /**
   * Horizontal Tabulation Set (HTS).
   */
  hterm.VT.CC1['\x88'] =
  hterm.VT.ESC['H'] = function() {
    this.terminal.setTabStop(this.terminal.getCursorColumn());
  };
  
  /**
   * Reverse Index (RI).
   *
   * Move up one line.
   */
  hterm.VT.CC1['\x8d'] =
  hterm.VT.ESC['M'] = function() {
    this.terminal.reverseLineFeed();
  };
  
  /**
   * Single Shift 2 (SS2).
   *
   * Select of G2 Character Set for the next character only.
   *
   * Not currently implemented.
   */
  hterm.VT.CC1['\x8e'] =
  hterm.VT.ESC['N'] = hterm.VT.ignore;
  
  /**
   * Single Shift 3 (SS3).
   *
   * Select of G3 Character Set for the next character only.
   *
   * Not currently implemented.
   */
  hterm.VT.CC1['\x8f'] =
  hterm.VT.ESC['O'] = hterm.VT.ignore;
  
  /**
   * Device Control String (DCS).
   *
   * Indicate a DCS sequence.  See Device-Control functions in [XTERM].
   * Not currently implemented.
   *
   * TODO(rginda): Consider implementing DECRQSS, the rest don't seem applicable.
   */
  hterm.VT.CC1['\x90'] =
  hterm.VT.ESC['P'] = function(parseState) {
    parseState.resetArguments();
    parseState.func = this.parseUntilStringTerminator_;
  };
  
  /**
   * Start of Protected Area (SPA).
   *
   * Will not implement.
   */
  hterm.VT.CC1['\x96'] =
  hterm.VT.ESC['V'] = hterm.VT.ignore;
  
  /**
   * End of Protected Area (EPA).
   *
   * Will not implement.
   */
  hterm.VT.CC1['\x97'] =
  hterm.VT.ESC['W'] = hterm.VT.ignore;
  
  /**
   * Start of String (SOS).
   *
   * Will not implement.
   */
  hterm.VT.CC1['\x98'] =
  hterm.VT.ESC['X'] = hterm.VT.ignore;
  
  /**
   * Single Character Introducer (SCI, also DECID).
   *
   * Return Terminal ID.  Obsolete form of 'ESC [ c' (DA).
   */
  hterm.VT.CC1['\x9a'] =
  hterm.VT.ESC['Z'] = function() {
    this.terminal.io.sendString('\x1b[?1;2c');
  };
  
  /**
   * Control Sequence Introducer (CSI).
   *
   * The lead into most escape sequences.  See [CSI].
   */
  hterm.VT.CC1['\x9b'] =
  hterm.VT.ESC['['] = function(parseState) {
    parseState.resetArguments();
    this.leadingModifier_ = '';
    this.trailingModifier_ = '';
    parseState.func = this.parseCSI_;
  };
  
  /**
   * String Terminator (ST).
   *
   * Used to terminate DCS/OSC/PM/APC commands which may take string arguments.
   *
   * We don't directly handle it here, as it's only used to terminate other
   * sequences.  See the 'parseUntilStringTerminator_' method.
   */
  hterm.VT.CC1['\x9c'] =
  hterm.VT.ESC['\\'] = hterm.VT.ignore;
  
  /**
   * Operating System Command (OSC).
   *
   * Commands relating to the operating system.
   */
  hterm.VT.CC1['\x9d'] =
  hterm.VT.ESC[']'] = function(parseState) {
    parseState.resetArguments();
  
    function parseOSC(parseState) {
      if (!this.parseUntilStringTerminator_(parseState)) {
        // The string sequence was too long.
        return;
      }
  
      if (parseState.func == parseOSC) {
        // We're not done parsing the string yet.
        return;
      }
  
      // We're done.
      var ary = parseState.args[0].match(/^(\d+);(.*)$/);
      if (ary) {
        parseState.args[0] = ary[2];
        this.dispatch('OSC', ary[1], parseState);
      } else {
        console.warn('Invalid OSC: ' + JSON.stringify(parseState.args[0]));
      }
    };
  
    parseState.func = parseOSC;
  };
  
  /**
   * Privacy Message (PM).
   *
   * Will not implement.
   */
  hterm.VT.CC1['\x9e'] =
  hterm.VT.ESC['^'] = function(parseState) {
    parseState.resetArguments();
    parseState.func = this.parseUntilStringTerminator_;
  };
  
  /**
   * Application Program Control (APC).
   *
   * Will not implement.
   */
  hterm.VT.CC1['\x9f'] =
  hterm.VT.ESC['_'] = function(parseState) {
    parseState.resetArguments();
    parseState.func = this.parseUntilStringTerminator_;
  };
  
  /**
   * ESC \x20 - Unclear to me where these originated, possibly in xterm.
   *
   * Not currently implemented:
   *   ESC \x20 F - Select 7 bit escape codes in responses (S7C1T).
   *   ESC \x20 G - Select 8 bit escape codes in responses (S8C1T).
   *                NB: We currently assume S7C1T always.
   *
   * Will not implement:
   *   ESC \x20 L - Set ANSI conformance level 1.
   *   ESC \x20 M - Set ANSI conformance level 2.
   *   ESC \x20 N - Set ANSI conformance level 3.
   */
  hterm.VT.ESC['\x20'] = function(parseState) {
    parseState.func = function(parseState) {
      var ch = parseState.consumeChar();
      if (this.warnUnimplemented)
        console.warn('Unimplemented sequence: ESC 0x20 ' + ch);
      parseState.resetParseFunction();
    };
  };
  
  /**
   * DEC 'ESC #' sequences.
   *
   * Handled:
   *   ESC # 8 - DEC Screen Alignment Test (DECALN).
   *             Fills the terminal with 'E's.  Used liberally by vttest.
   *
   * Ignored:
   *   ESC # 3 - DEC double-height line, top half (DECDHL).
   *   ESC # 4 - DEC double-height line, bottom half (DECDHL).
   *   ESC # 5 - DEC single-width line (DECSWL).
   *   ESC # 6 - DEC double-width line (DECDWL).
   */
  hterm.VT.ESC['#'] = function(parseState) {
    parseState.func = function(parseState) {
      var ch = parseState.consumeChar();
      if (ch == '8')
        this.terminal.fill('E');
  
      parseState.resetParseFunction();
    };
  };
  
  /**
   * 'ESC %' sequences, character set control.  Not currently implemented.
   *
   * To be implemented (currently ignored):
   *   ESC % @ - Set ISO 8859-1 character set.
   *   ESC % G - Set UTF-8 character set.
   *
   * All other ESC # sequences are echoed to the terminal.
   *
   * TODO(rginda): Implement.
   */
  hterm.VT.ESC['%'] = function(parseState) {
    parseState.func = function(parseState) {
      var ch = parseState.consumeChar();
      if (ch != '@' && ch != 'G' && this.warnUnimplemented)
        console.warn('Unknown ESC % argument: ' + JSON.stringify(ch));
      parseState.resetParseFunction();
    };
  };
  
  /**
   * Character Set Selection (SCS).
   *
   *   ESC ( Ps - Set G0 character set (VT100).
   *   ESC ) Ps - Set G1 character set (VT220).
   *   ESC * Ps - Set G2 character set (VT220).
   *   ESC + Ps - Set G3 character set (VT220).
   *   ESC - Ps - Set G1 character set (VT300).
   *   ESC . Ps - Set G2 character set (VT300).
   *   ESC / Ps - Set G3 character set (VT300).
   *
   * Values for Ps are:
   *   0 - DEC Special Character and Line Drawing Set.
   *   A - United Kingdom (UK).
   *   B - United States (USASCII).
   *   4 - Dutch.
   *   C or 5 - Finnish.
   *   R - French.
   *   Q - French Canadian.
   *   K - German.
   *   Y - Italian.
   *   E or 6 - Norwegian/Danish.
   *   Z - Spanish.
   *   H or 7 - Swedish.
   *   = - Swiss.
   *
   * All other sequences are echoed to the terminal.
   *
   * TODO(rginda): Implement.
   */
  hterm.VT.ESC['('] =
  hterm.VT.ESC[')'] =
  hterm.VT.ESC['*'] =
  hterm.VT.ESC['+'] =
  hterm.VT.ESC['-'] =
  hterm.VT.ESC['.'] =
  hterm.VT.ESC['/'] = function(parseState, code) {
    parseState.func = function(parseState) {
      var ch = parseState.consumeChar();
      if (ch == '\x1b') {
        parseState.resetParseFunction();
        parseState.func();
        return;
      }
  
      if (ch in hterm.VT.CharacterMap.maps) {
        if (code == '(') {
          this.G0 = hterm.VT.CharacterMap.maps[ch];
        } else if (code == ')' || code == '-') {
          this.G1 = hterm.VT.CharacterMap.maps[ch];
        } else if (code == '*' || code == '.') {
          this.G2 = hterm.VT.CharacterMap.maps[ch];
        } else if (code == '+' || code == '/') {
          this.G3 = hterm.VT.CharacterMap.maps[ch];
        }
      } else if (this.warnUnimplemented) {
        console.log('Invalid character set for "' + code + '": ' + ch);
      }
  
      parseState.resetParseFunction();
    };
  };
  
  /**
   * Back Index (DECBI).
   *
   * VT420 and up.  Not currently implemented.
   */
  hterm.VT.ESC['6'] = hterm.VT.ignore;
  
  /**
   * Save Cursor (DECSC).
   */
  hterm.VT.ESC['7'] = function() {
    this.savedState_.save();
  };
  
  /**
   * Restore Cursor (DECSC).
   */
  hterm.VT.ESC['8'] = function() {
    this.savedState_.restore();
  };
  
  /**
   * Forward Index (DECFI).
   *
   * VT210 and up.  Not currently implemented.
   */
  hterm.VT.ESC['9'] = hterm.VT.ignore;
  
  /**
   * Application keypad (DECPAM).
   */
  hterm.VT.ESC['='] = function() {
    this.terminal.keyboard.applicationKeypad = true;
  };
  
  /**
   * Normal keypad (DECPNM).
   */
  hterm.VT.ESC['>'] = function() {
    this.terminal.keyboard.applicationKeypad = false;
  };
  
  /**
   * Cursor to lower left corner of screen.
   *
   * Will not implement.
   *
   * This is only recognized by xterm when the hpLowerleftBugCompat resource is
   * set.
   */
  hterm.VT.ESC['F'] = hterm.VT.ignore;
  
  /**
   * Full Reset (RIS).
   */
  hterm.VT.ESC['c'] = function() {
    this.reset();
    this.terminal.reset();
  };
  
  /**
   * Memory lock/unlock.
   *
   * Will not implement.
   */
  hterm.VT.ESC['l'] =
  hterm.VT.ESC['m'] = hterm.VT.ignore;
  
  /**
   * Lock Shift 2 (LS2)
   *
   * Invoke the G2 Character Set as GL.
   */
  hterm.VT.ESC['n'] = function() {
    this.GL = 'G2';
  };
  
  /**
   * Lock Shift 3 (LS3)
   *
   * Invoke the G3 Character Set as GL.
   */
  hterm.VT.ESC['o'] = function() {
    this.GL = 'G3';
  };
  
  /**
   * Lock Shift 2, Right (LS3R)
   *
   * Invoke the G3 Character Set as GR.
   */
  hterm.VT.ESC['|'] = function() {
    this.GR = 'G3';
  };
  
  /**
   * Lock Shift 2, Right (LS2R)
   *
   * Invoke the G2 Character Set as GR.
   */
  hterm.VT.ESC['}'] = function() {
    this.GR = 'G2';
  };
  
  /**
   * Lock Shift 1, Right (LS1R)
   *
   * Invoke the G1 Character Set as GR.
   */
  hterm.VT.ESC['~'] = function() {
    this.GR = 'G1';
  };
  
  /**
   * Change icon name and window title.
   *
   * We only change the window title.
   */
  hterm.VT.OSC['0'] = function(parseState) {
    this.terminal.setWindowTitle(parseState.args[0]);
  };
  
  /**
   * Change window title.
   */
  hterm.VT.OSC['2'] = hterm.VT.OSC['0'];
  
  /**
   * Set/read color palette.
   */
  hterm.VT.OSC['4'] = function(parseState) {
    // Args come in as a single 'index1;rgb1 ... ;indexN;rgbN' string.
    // We split on the semicolon and iterate through the pairs.
    var args = parseState.args[0].split(';');
  
    var pairCount = parseInt(args.length / 2);
    var colorPalette = this.terminal.getTextAttributes().colorPalette;
    var responseArray = [];
  
    for (var pairNumber = 0; pairNumber < pairCount; ++pairNumber) {
      var colorIndex = parseInt(args[pairNumber * 2]);
      var colorValue = args[pairNumber * 2 + 1];
  
      if (colorIndex >= colorPalette.length)
        continue;
  
      if (colorValue == '?') {
        // '?' means we should report back the current color value.
        colorValue = lib.colors.rgbToX11(colorPalette[colorIndex]);
        if (colorValue)
          responseArray.push(colorIndex + ';' + colorValue);
  
        continue;
      }
  
      colorValue = lib.colors.x11ToCSS(colorValue);
      if (colorValue)
        colorPalette[colorIndex] = colorValue;
    }
  
    if (responseArray.length)
      this.terminal.io.sendString('\x1b]4;' + responseArray.join(';') + '\x07');
  };
  
  /**
   * Set the cursor shape.
   *
   * Parameter is expected to be in the form "CursorShape=number", where number is
   * one of:
   *
   *   0 - Block
   *   1 - I-Beam
   *   2 - Underline
   *
   * This is a bit of a de-facto standard supported by iTerm 2 and Konsole.  See
   * also: DECSCUSR.
   *
   * Invalid numbers will restore the cursor to the block shape.
   */
  hterm.VT.OSC['50'] = function(parseState) {
    var args = parseState.args[0].match(/CursorShape=(.)/i);
    if (!args) {
      console.warn('Could not parse OSC 50 args: ' + parseState.args[0]);
      return;
    }
  
    switch (args[1]) {
      case '1':
        this.terminal.setCursorShape(hterm.Terminal.cursorShape.BEAM);
        break;
  
      case '2':
        this.terminal.setCursorShape(hterm.Terminal.cursorShape.UNDERLINE);
        break;
  
      default:
        this.terminal.setCursorShape(hterm.Terminal.cursorShape.BLOCK);
    }
  };
  
  /**
   * Set/read system clipboard.
   *
   * Read is not implemented due to security considerations.  A remote app
   * that is able to both write and read to the clipboard could essentially
   * take over your session.
   *
   * The clipboard data will be decoded according to the 'receive-encoding'
   * preference.
   */
  hterm.VT.OSC['52'] = function(parseState) {
    // Args come in as a single 'clipboard;b64-data' string.  The clipboard
    // parameter is used to select which of the X clipboards to address.  Since
    // we're not integrating with X, we treat them all the same.
    var args = parseState.args[0].match(/^[cps01234567]*;(.*)/);
    if (!args)
      return;
  
    var data = window.atob(args[1]);
    if (data)
      this.terminal.copyStringToClipboard(this.decode(data));
  };
  
  /**
   * Insert (blank) characters (ICH).
   */
  hterm.VT.CSI['@'] = function(parseState) {
    this.terminal.insertSpace(parseState.iarg(0, 1));
  };
  
  /**
   * Cursor Up (CUU).
   */
  hterm.VT.CSI['A'] = function(parseState) {
    this.terminal.cursorUp(parseState.iarg(0, 1));
  };
  
  /**
   * Cursor Down (CUD).
   */
  hterm.VT.CSI['B'] = function(parseState) {
    this.terminal.cursorDown(parseState.iarg(0, 1));
  };
  
  /**
   * Cursor Forward (CUF).
   */
  hterm.VT.CSI['C'] = function(parseState) {
    this.terminal.cursorRight(parseState.iarg(0, 1));
  };
  
  /**
   * Cursor Backward (CUB).
   */
  hterm.VT.CSI['D'] = function(parseState) {
    this.terminal.cursorLeft(parseState.iarg(0, 1));
  };
  
  /**
   * Cursor Next Line (CNL).
   *
   * This is like Cursor Down, except the cursor moves to the beginning of the
   * line as well.
   */
  hterm.VT.CSI['E'] = function(parseState) {
    this.terminal.cursorDown(parseState.iarg(0, 1));
    this.terminal.setCursorColumn(0);
  };
  
  /**
   * Cursor Preceding Line (CPL).
   *
   * This is like Cursor Up, except the cursor moves to the beginning of the
   * line as well.
   */
  hterm.VT.CSI['F'] = function(parseState) {
    this.terminal.cursorUp(parseState.iarg(0, 1));
    this.terminal.setCursorColumn(0);
  };
  
  /**
   * Cursor Character Absolute (CHA).
   */
  hterm.VT.CSI['G'] = function(parseState) {
    this.terminal.setCursorColumn(parseState.iarg(0, 1) - 1);
  };
  
  /**
   * Cursor Position (CUP).
   */
  hterm.VT.CSI['H'] = function(parseState) {
    this.terminal.setCursorPosition(parseState.iarg(0, 1) - 1,
                                    parseState.iarg(1, 1) - 1);
  };
  
  /**
   * Cursor Forward Tabulation (CHT).
   */
  hterm.VT.CSI['I'] = function(parseState) {
    var count = parseState.iarg(0, 1);
    count = lib.f.clamp(count, 1, this.terminal.screenSize.width);
    for (var i = 0; i < count; i++) {
      this.terminal.forwardTabStop();
    }
  };
  
  /**
   * Erase in Display (ED, DECSED).
   */
  hterm.VT.CSI['J'] =
  hterm.VT.CSI['?J'] = function(parseState, code) {
    var arg = parseState.args[0];
  
    if (!arg || arg == '0') {
        this.terminal.eraseBelow();
    } else if (arg == '1') {
      this.terminal.eraseAbove();
    } else if (arg == '2') {
      this.terminal.clear();
    } else if (arg == '3') {
      // The xterm docs say this means "Erase saved lines", but we'll just clear
      // the display since killing the scrollback seems rude.
      this.terminal.clear();
    }
  };
  
  /**
   * Erase in line (EL, DECSEL).
   */
  hterm.VT.CSI['K'] =
  hterm.VT.CSI['?K'] = function(parseState, code) {
    var arg = parseState.args[0];
  
    if (!arg || arg == '0') {
      this.terminal.eraseToRight();
    } else if (arg == '1'){
      this.terminal.eraseToLeft();
    } else if (arg == '2') {
      this.terminal.eraseLine();
    }
  };
  
  /**
   * Insert Lines (IL).
   */
  hterm.VT.CSI['L'] = function(parseState) {
    this.terminal.insertLines(parseState.iarg(0, 1));
  };
  
  /**
   * Delete Lines (DL).
   */
  hterm.VT.CSI['M'] = function(parseState) {
    this.terminal.deleteLines(parseState.iarg(0, 1));
  };
  
  /**
   * Delete Characters (DCH).
   *
   * This command shifts the line contents left, starting at the cursor position.
   */
  hterm.VT.CSI['P'] = function(parseState) {
    this.terminal.deleteChars(parseState.iarg(0, 1));
  };
  
  /**
   * Scroll Up (SU).
   */
  hterm.VT.CSI['S'] = function(parseState) {
    this.terminal.vtScrollUp(parseState.iarg(0, 1));
  };
  
  /**
   * Scroll Down (SD).
   * Also 'Initiate highlight mouse tracking'.  Will not implement this part.
   */
  hterm.VT.CSI['T'] = function(parseState) {
    if (parseState.args.length <= 1)
      this.terminal.vtScrollDown(parseState.iarg(0, 1));
  };
  
  /**
   * Reset one or more features of the title modes to the default value.
   *
   *   ESC [ > Ps T
   *
   * Normally, "reset" disables the feature. It is possible to disable the
   * ability to reset features by compiling a different default for the title
   * modes into xterm.
   *
   * Ps values:
   *   0 - Do not set window/icon labels using hexadecimal.
   *   1 - Do not query window/icon labels using hexadecimal.
   *   2 - Do not set window/icon labels using UTF-8.
   *   3 - Do not query window/icon labels using UTF-8.
   *
   * Will not implement.
   */
  hterm.VT.CSI['>T'] = hterm.VT.ignore;
  
  /**
   * Erase Characters (ECH).
   */
  hterm.VT.CSI['X'] = function(parseState) {
    this.terminal.eraseToRight(parseState.iarg(0, 1));
  };
  
  /**
   * Cursor Backward Tabulation (CBT).
   */
  hterm.VT.CSI['Z'] = function(parseState) {
    var count = parseState.iarg(0, 1);
    count = lib.f.clamp(count, 1, this.terminal.screenSize.width);
    for (var i = 0; i < count; i++) {
      this.terminal.backwardTabStop();
    }
  };
  
  /**
   * Character Position Absolute (HPA).
   */
  hterm.VT.CSI['`'] = function(parseState) {
    this.terminal.setCursorColumn(parseState.iarg(0, 1) - 1);
  };
  
  /**
   * Repeat the preceding graphic character.
   *
   * Not currently implemented.
   */
  hterm.VT.CSI['b'] = hterm.VT.ignore;
  
  /**
   * Send Device Attributes (Primary DA).
   *
   * TODO(rginda): This is hardcoded to send back 'VT100 with Advanced Video
   * Option', but it may be more correct to send a VT220 response once
   * we fill out the 'Not currently implemented' parts.
   */
  hterm.VT.CSI['c'] = function(parseState) {
    if (!parseState.args[0] || parseState.args[0] == '0') {
      this.terminal.io.sendString('\x1b[?1;2c');
    }
  };
  
  /**
   * Send Device Attributes (Secondary DA).
   *
   * TODO(rginda): This is hardcoded to send back 'VT100' but it may be more
   * correct to send a VT220 response once we fill out more 'Not currently
   * implemented' parts.
   */
  hterm.VT.CSI['>c'] = function(parseState) {
    this.terminal.io.sendString('\x1b[>0;256;0c');
  };
  
  /**
   * Line Position Absolute (VPA).
   */
  hterm.VT.CSI['d'] = function(parseState) {
    this.terminal.setAbsoluteCursorRow(parseState.iarg(0, 1) - 1);
  };
  
  /**
   * Horizontal and Vertical Position (HVP).
   *
   * Same as Cursor Position (CUP).
   */
  hterm.VT.CSI['f'] = hterm.VT.CSI['H'];
  
  /**
   * Tab Clear (TBC).
   */
  hterm.VT.CSI['g'] = function(parseState) {
    if (!parseState.args[0] || parseState.args[0] == '0') {
      // Clear tab stop at cursor.
      this.terminal.clearTabStopAtCursor(false);
    } else if (parseState.args[0] == '3') {
      // Clear all tab stops.
      this.terminal.clearAllTabStops();
    }
  };
  
  /**
   * Set Mode (SM).
   */
  hterm.VT.CSI['h'] = function(parseState) {
    for (var i = 0; i < parseState.args.length; i++) {
      this.setANSIMode(parseState.args[i], true);
    }
  };
  
  /**
   * DEC Private Mode Set (DECSET).
   */
  hterm.VT.CSI['?h'] = function(parseState) {
    for (var i = 0; i < parseState.args.length; i++) {
      this.setDECMode(parseState.args[i], true);
    }
  };
  
  /**
   * Media Copy (MC).
   * Media Copy (MC, DEC Specific).
   *
   * These commands control the printer.  Will not implement.
   */
  hterm.VT.CSI['i'] =
  hterm.VT.CSI['?i'] = hterm.VT.ignore;
  
  /**
   * Reset Mode (RM).
   */
  hterm.VT.CSI['l'] = function(parseState) {
    for (var i = 0; i < parseState.args.length; i++) {
      this.setANSIMode(parseState.args[i], false);
    }
  };
  
  /**
   * DEC Private Mode Reset (DECRST).
   */
  hterm.VT.CSI['?l'] = function(parseState) {
    for (var i = 0; i < parseState.args.length; i++) {
      this.setDECMode(parseState.args[i], false);
    }
  };
  
  /**
   * Character Attributes (SGR).
   *
   * Iterate through the list of arguments, applying the following attribute
   * changes based on the argument value...
   *
   *    0 Normal (default).
   *    1 Bold.
   *    2 Faint.
   *    3 Italic (non-xterm).
   *    4 Underlined.
   *    5 Blink (appears as Bold).
   *    7 Inverse.
   *    8 Invisible, i.e., hidden (VT300).
   *    9 Crossed out (ECMA-48).
   *   22 Normal (neither bold nor faint).
   *   23 Not italic (non-xterm).
   *   24 Not underlined.
   *   25 Steady (not blinking).
   *   27 Positive (not inverse).
   *   28 Visible, i.e., not hidden (VT300).
   *   29 Not crossed out (ECMA-48).
   *   30 Set foreground color to Black.
   *   31 Set foreground color to Red.
   *   32 Set foreground color to Green.
   *   33 Set foreground color to Yellow.
   *   34 Set foreground color to Blue.
   *   35 Set foreground color to Magenta.
   *   36 Set foreground color to Cyan.
   *   37 Set foreground color to White.
   *   39 Set foreground color to default (original).
   *   40 Set background color to Black.
   *   41 Set background color to Red.
   *   42 Set background color to Green.
   *   43 Set background color to Yellow.
   *   44 Set background color to Blue.
   *   45 Set background color to Magenta.
   *   46 Set background color to Cyan.
   *   47 Set background color to White.
   *   49 Set background color to default (original)
   *
   * Non-xterm (italic) codes have mixed support, but are supported by both
   * gnome-terminal and rxvt and are recognized as CSI codes on Wikipedia
   * (http://en.wikipedia.org/wiki/ANSI_escape_code).
   *
   * For 16-color support, the following apply.
   *
   *   90 Set foreground color to Bright Black.
   *   91 Set foreground color to Bright Red.
   *   92 Set foreground color to Bright Green.
   *   93 Set foreground color to Bright Yellow.
   *   94 Set foreground color to Bright Blue.
   *   95 Set foreground color to Bright Magenta.
   *   96 Set foreground color to Bright Cyan.
   *   97 Set foreground color to Bright White.
   *  100 Set background color to Bright Black.
   *  101 Set background color to Bright Red.
   *  102 Set background color to Bright Green.
   *  103 Set background color to Bright Yellow.
   *  104 Set background color to Bright Blue.
   *  105 Set background color to Bright Magenta.
   *  106 Set background color to Bright Cyan.
   *  107 Set background color to Bright White.
   *
   * For 88- or 256-color support, the following apply.
   *  38 ; 5 ; P Set foreground color to P.
   *  48 ; 5 ; P Set background color to P.
   *
   *  For true color (24-bit) support, the following apply.
   *  38 ; 2 ; R ; G ; B Set foreground color to rgb(R, G, B)
   *  48 ; 2 ; R ; G ; B Set background color to rgb(R, G, B)
   *
   * Note that most terminals consider "bold" to be "bold and bright".  In
   * some documents the bold state is even referred to as bright.  We interpret
   * bold as bold-bright here too, but only when the "bold" setting comes before
   * the color selection.
   */
  hterm.VT.CSI['m'] = function(parseState) {
    function get256(i) {
      if (parseState.args.length < i + 2 || parseState.args[i + 1] != '5')
        return null;
  
      return parseState.iarg(i + 2, 0);
    }
  
    function getTrueColor(i) {
      if (parseState.args.length < i + 5 || parseState.args[i + 1] != '2')
        return null;
      var r = parseState.iarg(i + 2, 0);
      var g = parseState.iarg(i + 3, 0);
      var b = parseState.iarg(i + 4, 0);
  
      return 'rgb(' + r + ' ,' + g + ' ,' + b + ')';
    }
  
    var attrs = this.terminal.getTextAttributes();
  
    if (!parseState.args.length) {
      attrs.reset();
      return;
    }
  
    for (var i = 0; i < parseState.args.length; i++) {
      var arg = parseState.iarg(i, 0);
  
      if (arg < 30) {
        if (arg == 0) {
          attrs.reset();
        } else if (arg == 1) {
          attrs.bold = true;
        } else if (arg == 2) {
          attrs.faint = true;
        } else if (arg == 3) {
          attrs.italic = true;
        } else if (arg == 4) {
          attrs.underline = true;
        } else if (arg == 5) {
          attrs.blink = true;
        } else if (arg == 7) {  // Inverse.
          attrs.inverse = true;
        } else if (arg == 8) {  // Invisible.
          attrs.invisible = true;
        } else if (arg == 9) {
          attrs.strikethrough = true;
        } else if (arg == 22) {
          attrs.bold = false;
          attrs.faint = false;
        } else if (arg == 23) {
          attrs.italic = false;
        } else if (arg == 24) {
          attrs.underline = false;
        } else if (arg == 25) {
          attrs.blink = false;
        } else if (arg == 27) {
          attrs.inverse = false;
        } else if (arg == 28) {
          attrs.invisible = false;
        } else if (arg == 29) {
          attrs.strikethrough = false;
        }
  
      } else if (arg < 50) {
        // Select fore/background color from bottom half of 16 color palette
        // or from the 256 color palette or alternative specify color in fully
        // qualified rgb(r, g, b) form.
        if (arg < 38) {
          attrs.foregroundSource = arg - 30;
  
        } else if (arg == 38) {
          // First check for true color definition
          var trueColor = getTrueColor(i);
          if (trueColor != null) {
            attrs.foregroundSource = attrs.SRC_RGB;
            attrs.foreground = trueColor;
  
            i += 5;
          } else {
            // Check for 256 color
            var c = get256(i);
            if (c == null)
              break;
  
            i += 2;
  
            if (c >= attrs.colorPalette.length)
              continue;
  
            attrs.foregroundSource = c;
          }
  
        } else if (arg == 39) {
          attrs.foregroundSource = attrs.SRC_DEFAULT;
  
        } else if (arg < 48) {
          attrs.backgroundSource = arg - 40;
  
        } else if (arg == 48) {
          // First check for true color definition
          var trueColor = getTrueColor(i);
          if (trueColor != null) {
            attrs.backgroundSource = attrs.SRC_RGB;
            attrs.background = trueColor;
  
            i += 5;
          } else {
            // Check for 256 color
            var c = get256(i);
            if (c == null)
              break;
  
            i += 2;
  
            if (c >= attrs.colorPalette.length)
              continue;
  
            attrs.backgroundSource = c;
          }
        } else {
          attrs.backgroundSource = attrs.SRC_DEFAULT;
        }
  
      } else if (arg >= 90 && arg <= 97) {
        attrs.foregroundSource = arg - 90 + 8;
  
      } else if (arg >= 100 && arg <= 107) {
        attrs.backgroundSource = arg - 100 + 8;
      }
    }
  
    attrs.setDefaults(this.terminal.getForegroundColor(),
                      this.terminal.getBackgroundColor());
  };
  
  /**
   * Set xterm-specific keyboard modes.
   *
   * Will not implement.
   */
  hterm.VT.CSI['>m'] = hterm.VT.ignore;
  
  /**
   * Device Status Report (DSR, DEC Specific).
   *
   * 5 - Status Report. Result (OK) is CSI 0 n
   * 6 - Report Cursor Position (CPR) [row;column]. Result is CSI r ; c R
   */
  hterm.VT.CSI['n'] = function(parseState) {
    if (parseState.args[0] == '5') {
      this.terminal.io.sendString('\x1b0n');
    } else if (parseState.args[0] == '6') {
      var row = this.terminal.getCursorRow() + 1;
      var col = this.terminal.getCursorColumn() + 1;
      this.terminal.io.sendString('\x1b[' + row + ';' + col + 'R');
    }
  };
  
  /**
   * Disable modifiers which may be enabled via CSI['>m'].
   *
   * Will not implement.
   */
  hterm.VT.CSI['>n'] = hterm.VT.ignore;
  
  /**
   * Device Status Report (DSR, DEC Specific).
   *
   * 6  - Report Cursor Position (CPR) [row;column] as CSI ? r ; c R
   * 15 - Report Printer status as CSI ? 1 0 n (ready) or
   *      CSI ? 1 1 n (not ready).
   * 25 - Report UDK status as CSI ? 2 0 n (unlocked) or CSI ? 2 1 n (locked).
   * 26 - Report Keyboard status as CSI ? 2 7 ; 1 ; 0 ; 0 n (North American).
   *      The last two parameters apply to VT400 & up, and denote keyboard ready
   *      and LK01 respectively.
   * 53 - Report Locator status as CSI ? 5 3 n Locator available, if compiled-in,
   *      or CSI ? 5 0 n No Locator, if not.
   */
  hterm.VT.CSI['?n'] = function(parseState) {
    if (parseState.args[0] == '6') {
      var row = this.terminal.getCursorRow() + 1;
      var col = this.terminal.getCursorColumn() + 1;
      this.terminal.io.sendString('\x1b[' + row + ';' + col + 'R');
    } else if (parseState.args[0] == '15') {
      this.terminal.io.sendString('\x1b[?11n');
    } else if (parseState.args[0] == '25') {
      this.terminal.io.sendString('\x1b[?21n');
    } else if (parseState.args[0] == '26') {
      this.terminal.io.sendString('\x1b[?12;1;0;0n');
    } else if (parseState.args[0] == '53') {
      this.terminal.io.sendString('\x1b[?50n');
    }
  };
  
  /**
   * This is used by xterm to decide whether to hide the pointer cursor as the
   * user types.
   *
   * Valid values for the parameter:
   *   0 - Never hide the pointer.
   *   1 - Hide if the mouse tracking mode is not enabled.
   *   2 - Always hide the pointer.
   *
   * If no parameter is given, xterm uses the default, which is 1.
   *
   * Not currently implemented.
   */
  hterm.VT.CSI['>p'] = hterm.VT.ignore;
  
  /**
   * Soft terminal reset (DECSTR).
   */
  hterm.VT.CSI['!p'] = function() {
    this.reset();
    this.terminal.softReset();
  };
  
  /**
   * Request ANSI Mode (DECRQM).
   *
   * Not currently implemented.
   */
  hterm.VT.CSI['$p'] = hterm.VT.ignore;
  hterm.VT.CSI['?$p'] = hterm.VT.ignore;
  
  /**
   * Set conformance level (DECSCL).
   *
   * Not currently implemented.
   */
  hterm.VT.CSI['"p'] = hterm.VT.ignore;
  
  /**
   * Load LEDs (DECLL).
   *
   * Not currently implemented.  Could be implemented as virtual LEDs overlaying
   * the terminal if anyone cares.
   */
  hterm.VT.CSI['q'] = hterm.VT.ignore;
  
  /**
   * Set cursor style (DECSCUSR, VT520).
   *
   *   0 - Blinking block.
   *   1 - Blinking block (default).
   *   2 - Steady block.
   *   3 - Blinking underline.
   *   4 - Steady underline.
   */
  hterm.VT.CSI[' q'] = function(parseState) {
    var arg = parseState.args[0];
  
    if (arg == '0' || arg == '1') {
      this.terminal.setCursorShape(hterm.Terminal.cursorShape.BLOCK);
      this.terminal.setCursorBlink(true);
    } else if (arg == '2') {
      this.terminal.setCursorShape(hterm.Terminal.cursorShape.BLOCK);
      this.terminal.setCursorBlink(false);
    } else if (arg == '3') {
      this.terminal.setCursorShape(hterm.Terminal.cursorShape.UNDERLINE);
      this.terminal.setCursorBlink(true);
    } else if (arg == '4') {
      this.terminal.setCursorShape(hterm.Terminal.cursorShape.UNDERLINE);
      this.terminal.setCursorBlink(false);
    } else {
      console.warn('Unknown cursor style: ' + arg);
    }
  };
  
  /**
   * Select character protection attribute (DECSCA).
   *
   * Will not implement.
   */
  hterm.VT.CSI['"q'] = hterm.VT.ignore;
  
  /**
   * Set Scrolling Region (DECSTBM).
   */
  hterm.VT.CSI['r'] = function(parseState) {
    var args = parseState.args;
    var scrollTop = args[0] ? parseInt(args[0], 10) -1 : null;
    var scrollBottom = args[1] ? parseInt(args[1], 10) - 1 : null;
    this.terminal.setVTScrollRegion(scrollTop, scrollBottom);
    this.terminal.setCursorPosition(0, 0);
  };
  
  /**
   * Restore DEC Private Mode Values.
   *
   * Will not implement.
   */
  hterm.VT.CSI['?r'] = hterm.VT.ignore;
  
  /**
   * Change Attributes in Rectangular Area (DECCARA)
   *
   * Will not implement.
   */
  hterm.VT.CSI['$r'] = hterm.VT.ignore;
  
  /**
   * Save cursor (ANSI.SYS)
   */
  hterm.VT.CSI['s'] = function() {
    this.savedState_.save();
  };
  
  /**
   * Save DEC Private Mode Values.
   *
   * Will not implement.
   */
  hterm.VT.CSI['?s'] = hterm.VT.ignore;
  
  /**
   * Window manipulation (from dtterm, as well as extensions).
   *
   * Will not implement.
   */
  hterm.VT.CSI['t'] = hterm.VT.ignore;
  
  /**
   * Reverse Attributes in Rectangular Area (DECRARA).
   *
   * Will not implement.
   */
  hterm.VT.CSI['$t'] = hterm.VT.ignore;
  
  /**
   * Set one or more features of the title modes.
   *
   * Will not implement.
   */
  hterm.VT.CSI['>t'] = hterm.VT.ignore;
  
  /**
   * Set warning-bell volume (DECSWBV, VT520).
   *
   * Will not implement.
   */
  hterm.VT.CSI[' t'] = hterm.VT.ignore;
  
  /**
   * Restore cursor (ANSI.SYS).
   */
  hterm.VT.CSI['u'] = function() {
    this.savedState_.restore();
  };
  
  /**
   * Set margin-bell volume (DECSMBV, VT520).
   *
   * Will not implement.
   */
  hterm.VT.CSI[' u'] = hterm.VT.ignore;
  
  /**
   * Copy Rectangular Area (DECCRA, VT400 and up).
   *
   * Will not implement.
   */
  hterm.VT.CSI['$v'] = hterm.VT.ignore;
  
  /**
   * Enable Filter Rectangle (DECEFR).
   *
   * Will not implement.
   */
  hterm.VT.CSI['\'w'] = hterm.VT.ignore;
  
  /**
   * Request Terminal Parameters (DECREQTPARM).
   *
   * Not currently implemented.
   */
  hterm.VT.CSI['x'] = hterm.VT.ignore;
  
  /**
   * Select Attribute Change Extent (DECSACE).
   *
   * Will not implement.
   */
  hterm.VT.CSI['*x'] = hterm.VT.ignore;
  
  /**
   * Fill Rectangular Area (DECFRA), VT420 and up.
   *
   * Will not implement.
   */
  hterm.VT.CSI['$x'] = hterm.VT.ignore;
  
  /**
   * vt_tiledata (as used by NAOhack and UnNetHack)
   * (see http://nethackwiki.com/wiki/Vt_tiledata for more info)
   *
   * Implemented as far as we care (start a glyph and end a glyph).
   */
  hterm.VT.CSI['z'] = function(parseState) {
    if (parseState.args.length < 1)
      return;
    var arg = parseState.args[0];
    if (arg == '0') {
      // Start a glyph (one parameter, the glyph number).
      if (parseState.args.length < 2)
        return;
      this.terminal.getTextAttributes().tileData = parseState.args[1];
    } else if (arg == '1') {
      // End a glyph.
      this.terminal.getTextAttributes().tileData = null;
    }
  };
  
  /**
   * Enable Locator Reporting (DECELR).
   *
   * Not currently implemented.
   */
  hterm.VT.CSI['\'z'] = hterm.VT.ignore;
  
  /**
   * Erase Rectangular Area (DECERA), VT400 and up.
   *
   * Will not implement.
   */
  hterm.VT.CSI['$z'] = hterm.VT.ignore;
  
  /**
   * Select Locator Events (DECSLE).
   *
   * Not currently implemented.
   */
  hterm.VT.CSI['\'{'] = hterm.VT.ignore;
  
  /**
   * Request Locator Position (DECRQLP).
   *
   * Not currently implemented.
   */
  hterm.VT.CSI['\'|'] = hterm.VT.ignore;
  
  /**
   * Insert Columns (DECIC), VT420 and up.
   *
   * Will not implement.
   */
  hterm.VT.CSI[' }'] = hterm.VT.ignore;
  
  /**
   * Delete P s Columns (DECDC), VT420 and up.
   *
   * Will not implement.
   */
  hterm.VT.CSI[' ~'] = hterm.VT.ignore;
  // SOURCE FILE: hterm/js/hterm_vt_character_map.js
  // Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  'use strict';
  
  lib.rtdep('lib.f');
  
  /**
   * Character map object.
   *
   * @param {object} The GL mapping from input characters to output characters.
   *     The GR mapping will be automatically created.
   */
  hterm.VT.CharacterMap = function(name, glmap) {
    /**
     * Short name for this character set, useful for debugging.
     */
    this.name = name;
  
    /**
     * The function to call to when this map is installed in GL.
     */
    this.GL = null;
  
    /**
     * The function to call to when this map is installed in GR.
     */
    this.GR = null;
  
    if (glmap)
      this.reset(glmap);
  };
  
  /**
   * @param {object} The GL mapping from input characters to output characters.
   *     The GR mapping will be automatically created.
   */
  hterm.VT.CharacterMap.prototype.reset = function(glmap) {
    // Set the the GL mapping.
    this.glmap = glmap;
  
    var glkeys = Object.keys(this.glmap).map(function(key) {
        return '\\x' + lib.f.zpad(key.charCodeAt(0).toString(16));
      });
  
    this.glre = new RegExp('[' + glkeys.join('') + ']', 'g');
  
    // Compute the GR mapping.
    // This is the same as GL except all keys have their MSB set.
    this.grmap = {};
  
    glkeys.forEach(function(glkey) {
        var grkey = String.fromCharCode(glkey.charCodeAt(0) & 0x80);
        this.grmap[grkey] = this.glmap[glkey];
      }.bind(this));
  
    var grkeys = Object.keys(this.grmap).map(function(key) {
        return '\\x' + lib.f.zpad(key.charCodeAt(0).toString(16), 2);
      });
  
    this.grre = new RegExp('[' + grkeys.join('') + ']', 'g');
  
    this.GL = function(str) {
      return str.replace(this.glre,
                         function(ch) { return this.glmap[ch] }.bind(this));
    }.bind(this);
  
    this.GR = function(str) {
      return str.replace(this.grre,
                         function(ch) { return this.grmap[ch] }.bind(this));
    }.bind(this);
  };
  
  /**
   * Mapping from received to display character, used depending on the active
   * VT character set.
   */
  hterm.VT.CharacterMap.maps = {};
  
  /**
   * VT100 Graphic character map.
   * http://vt100.net/docs/vt220-rm/table2-4.html
   */
  hterm.VT.CharacterMap.maps['0'] = new hterm.VT.CharacterMap(
      'graphic', {
        '\x60':'\u25c6',  // ` -> diamond
        '\x61':'\u2592',  // a -> grey-box
        '\x62':'\u2409',  // b -> h/t
        '\x63':'\u240c',  // c -> f/f
        '\x64':'\u240d',  // d -> c/r
        '\x65':'\u240a',  // e -> l/f
        '\x66':'\u00b0',  // f -> degree
        '\x67':'\u00b1',  // g -> +/-
        '\x68':'\u2424',  // h -> n/l
        '\x69':'\u240b',  // i -> v/t
        '\x6a':'\u2518',  // j -> bottom-right
        '\x6b':'\u2510',  // k -> top-right
        '\x6c':'\u250c',  // l -> top-left
        '\x6d':'\u2514',  // m -> bottom-left
        '\x6e':'\u253c',  // n -> line-cross
        '\x6f':'\u23ba',  // o -> scan1
        '\x70':'\u23bb',  // p -> scan3
        '\x71':'\u2500',  // q -> scan5
        '\x72':'\u23bc',  // r -> scan7
        '\x73':'\u23bd',  // s -> scan9
        '\x74':'\u251c',  // t -> left-tee
        '\x75':'\u2524',  // u -> right-tee
        '\x76':'\u2534',  // v -> bottom-tee
        '\x77':'\u252c',  // w -> top-tee
        '\x78':'\u2502',  // x -> vertical-line
        '\x79':'\u2264',  // y -> less-equal
        '\x7a':'\u2265',  // z -> greater-equal
        '\x7b':'\u03c0',  // { -> pi
        '\x7c':'\u2260',  // | -> not-equal
        '\x7d':'\u00a3',  // } -> british-pound
        '\x7e':'\u00b7',  // ~ -> dot
      });
  
  /**
   * British character map.
   * http://vt100.net/docs/vt220-rm/table2-5.html
   */
  hterm.VT.CharacterMap.maps['A'] = new hterm.VT.CharacterMap(
      'british', {
        '\x23': '\u00a3',  // # -> british-pound
      });
  
  /**
   * US ASCII map, no changes.
   */
  hterm.VT.CharacterMap.maps['B'] = new hterm.VT.CharacterMap(
      'us', null);
  
  /**
   * Dutch character map.
   * http://vt100.net/docs/vt220-rm/table2-6.html
   */
  hterm.VT.CharacterMap.maps['4'] = new hterm.VT.CharacterMap(
      'dutch', {
        '\x23': '\u00a3',  // # -> british-pound
  
        '\x40': '\u00be',  // @ -> 3/4
  
        '\x5b': '\u0132',  // [ -> 'ij' ligature (xterm goes with \u00ff?)
        '\x5c': '\u00bd',  // \ -> 1/2
        '\x5d': '\u007c',  // ] -> vertical bar
  
        '\x7b': '\u00a8',  // { -> two dots
        '\x7c': '\u0066',  // | -> f
        '\x7d': '\u00bc',  // } -> 1/4
        '\x7e': '\u00b4',  // ~ -> acute
      });
  
  /**
   * Finnish character map.
   * http://vt100.net/docs/vt220-rm/table2-7.html
   */
  hterm.VT.CharacterMap.maps['C'] =
  hterm.VT.CharacterMap.maps['5'] = new hterm.VT.CharacterMap(
      'finnish', {
        '\x5b': '\u00c4',  // [ -> 'A' umlaut
        '\x5c': '\u00d6',  // \ -> 'O' umlaut
        '\x5d': '\u00c5',  // ] -> 'A' ring
        '\x5e': '\u00dc',  // ~ -> 'u' umlaut
  
        '\x60': '\u00e9',  // ` -> 'e' acute
  
        '\x7b': '\u00e4',  // { -> 'a' umlaut
        '\x7c': '\u00f6',  // | -> 'o' umlaut
        '\x7d': '\u00e5',  // } -> 'a' ring
        '\x7e': '\u00fc',  // ~ -> 'u' umlaut
      });
  
  /**
   * French character map.
   * http://vt100.net/docs/vt220-rm/table2-8.html
   */
  hterm.VT.CharacterMap.maps['R'] = new hterm.VT.CharacterMap(
      'french', {
        '\x23': '\u00a3',  // # -> british-pound
  
        '\x40': '\u00e0',  // @ -> 'a' grave
  
        '\x5b': '\u00b0',  // [ -> ring
        '\x5c': '\u00e7',  // \ -> 'c' cedilla
        '\x5d': '\u00a7',  // ] -> section symbol (double s)
  
        '\x7b': '\u00e9',  // { -> 'e' acute
        '\x7c': '\u00f9',  // | -> 'u' grave
        '\x7d': '\u00e8',  // } -> 'e' grave
        '\x7e': '\u00a8',  // ~ -> umlaut
      });
  
  /**
   * French Canadian character map.
   * http://vt100.net/docs/vt220-rm/table2-9.html
   */
  hterm.VT.CharacterMap.maps['Q'] = new hterm.VT.CharacterMap(
      'french canadian', {
        '\x40': '\u00e0',  // @ -> 'a' grave
  
        '\x5b': '\u00e2',  // [ -> 'a' circumflex
        '\x5c': '\u00e7',  // \ -> 'c' cedilla
        '\x5d': '\u00ea',  // ] -> 'e' circumflex
        '\x5e': '\u00ee',  // ^ -> 'i' circumflex
  
        '\x60': '\u00f4',  // ` -> 'o' circumflex
  
        '\x7b': '\u00e9',  // { -> 'e' acute
        '\x7c': '\u00f9',  // | -> 'u' grave
        '\x7d': '\u00e8',  // } -> 'e' grave
        '\x7e': '\u00fb',  // ~ -> 'u' circumflex
      });
  
  /**
   * German character map.
   * http://vt100.net/docs/vt220-rm/table2-10.html
   */
  hterm.VT.CharacterMap.maps['K'] = new hterm.VT.CharacterMap(
      'german', {
        '\x40': '\u00a7',  // @ -> section symbol (double s)
  
        '\x5b': '\u00c4',  // [ -> 'A' umlaut
        '\x5c': '\u00d6',  // \ -> 'O' umlaut
        '\x5d': '\u00dc',  // ] -> 'U' umlaut
  
        '\x7b': '\u00e4',  // { -> 'a' umlaut
        '\x7c': '\u00f6',  // | -> 'o' umlaut
        '\x7d': '\u00fc',  // } -> 'u' umlaut
        '\x7e': '\u00df',  // ~ -> eszett
      });
  
  /**
   * Italian character map.
   * http://vt100.net/docs/vt220-rm/table2-11.html
   */
  hterm.VT.CharacterMap.maps['Y'] = new hterm.VT.CharacterMap(
      'italian', {
        '\x23': '\u00a3',  // # -> british-pound
  
        '\x40': '\u00a7',  // @ -> section symbol (double s)
  
        '\x5b': '\u00b0',  // [ -> ring
        '\x5c': '\u00e7',  // \ -> 'c' cedilla
        '\x5d': '\u00e9',  // ] -> 'e' acute
  
        '\x60': '\u00f9',  // ` -> 'u' grave
  
        '\x7b': '\u00e0',  // { -> 'a' grave
        '\x7c': '\u00f2',  // | -> 'o' grave
        '\x7d': '\u00e8',  // } -> 'e' grave
        '\x7e': '\u00ec',  // ~ -> 'i' grave
      });
  
  /**
   * Norwegian/Danish character map.
   * http://vt100.net/docs/vt220-rm/table2-12.html
   */
  hterm.VT.CharacterMap.maps['E'] =
  hterm.VT.CharacterMap.maps['6'] = new hterm.VT.CharacterMap(
      'norwegian/danish', {
        '\x40': '\u00c4',  // @ -> 'A' umlaut
  
        '\x5b': '\u00c6',  // [ -> 'AE' ligature
        '\x5c': '\u00d8',  // \ -> 'O' stroke
        '\x5d': '\u00c5',  // ] -> 'A' ring
        '\x5e': '\u00dc',  // ^ -> 'U' umlaut
  
        '\x60': '\u00e4',  // ` -> 'a' umlaut
  
        '\x7b': '\u00e6',  // { -> 'ae' ligature
        '\x7c': '\u00f8',  // | -> 'o' stroke
        '\x7d': '\u00e5',  // } -> 'a' ring
        '\x7e': '\u00fc',  // ~ -> 'u' umlaut
      });
  
  /**
   * Spanish character map.
   * http://vt100.net/docs/vt220-rm/table2-13.html
   */
  hterm.VT.CharacterMap.maps['Z'] = new hterm.VT.CharacterMap(
      'spanish', {
        '\x23': '\u00a3',  // # -> british-pound
  
        '\x40': '\u00a7',  // @ -> section symbol (double s)
  
        '\x5b': '\u00a1',  // [ -> '!' inverted
        '\x5c': '\u00d1',  // \ -> 'N' tilde
        '\x5d': '\u00bf',  // ] -> '?' inverted
  
        '\x7b': '\u00b0',  // { -> ring
        '\x7c': '\u00f1',  // | -> 'n' tilde
        '\x7d': '\u00e7',  // } -> 'c' cedilla
      });
  
  /**
   * Swedish character map.
   * http://vt100.net/docs/vt220-rm/table2-14.html
   */
  hterm.VT.CharacterMap.maps['7'] =
  hterm.VT.CharacterMap.maps['H'] = new hterm.VT.CharacterMap(
      'swedish', {
        '\x40': '\u00c9',  // @ -> 'E' acute
  
        '\x5b': '\u00c4',  // [ -> 'A' umlaut
        '\x5c': '\u00d6',  // \ -> 'O' umlaut
        '\x5d': '\u00c5',  // ] -> 'A' ring
        '\x5e': '\u00dc',  // ^ -> 'U' umlaut
  
        '\x60': '\u00e9',  // ` -> 'e' acute
  
        '\x7b': '\u00e4',  // { -> 'a' umlaut
        '\x7c': '\u00f6',  // | -> 'o' umlaut
        '\x7d': '\u00e5',  // } -> 'a' ring
        '\x7e': '\u00fc',  // ~ -> 'u' umlaut
      });
  
  /**
   * Swiss character map.
   * http://vt100.net/docs/vt220-rm/table2-15.html
   */
  hterm.VT.CharacterMap.maps['='] = new hterm.VT.CharacterMap(
      'swiss', {
        '\x23': '\u00f9',  // # -> 'u' grave
  
        '\x40': '\u00e0',  // @ -> 'a' grave
  
        '\x5b': '\u00e9',  // [ -> 'e' acute
        '\x5c': '\u00e7',  // \ -> 'c' cedilla
        '\x5d': '\u00ea',  // ] -> 'e' circumflex
        '\x5e': '\u00ee',  // ^ -> 'i' circumflex
        '\x5f': '\u00e8',  // _ -> 'e' grave
  
        '\x60': '\u00f4',  // ` -> 'o' circumflex
  
        '\x7b': '\u00e4',  // { -> 'a' umlaut
        '\x7c': '\u00f6',  // | -> 'o' umlaut
        '\x7d': '\u00fc',  // } -> 'u' umlaut
        '\x7e': '\u00fb',  // ~ -> 'u' circumflex
      });
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  ''
  );
  
  lib.resource.add('hterm/concat/date', 'text/plain',
  'Tue, 05 Apr 2016 11:19:45 +0000' +
  ''
  );
  
  lib.resource.add('hterm/changelog/version', 'text/plain',
  '1.56' +
  ''
  );
  
  lib.resource.add('hterm/changelog/date', 'text/plain',
  '2015-06-16' +
  ''
  );
  
  lib.resource.add('hterm/git/HEAD', 'text/plain',
  'bc212762663b9070c5f728cf29f82b4422a0a192' +
  ''
  );
  
  