text: /* ***** BEGIN LICENSE BLOCK *****
   * Distributed under the BSD license:
   *
   * Copyright (c) 2010, Ajax.org B.V.
   * All rights reserved.
   * 
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *     * Redistributions of source code must retain the above copyright
   *       notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above copyright
   *       notice, this list of conditions and the following disclaimer in the
   *       documentation and/or other materials provided with the distribution.
   *     * Neither the name of Ajax.org B.V. nor the
   *       names of its contributors may be used to endorse or promote products
   *       derived from this software without specific prior written permission.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
   * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * ***** END LICENSE BLOCK ***** */
   
  define(function(require, exports, module) {
  
  "never use strict";
  
  var lang = require("../../lib/lang");
  var util = require("./maps/util");
  var motions = require("./maps/motions");
  var operators = require("./maps/operators");
  var alias = require("./maps/aliases");
  var registers = require("./registers");
  
  var NUMBER = 1;
  var OPERATOR = 2;
  var MOTION = 3;
  var ACTION = 4;
  var HMARGIN = 8; // Minimum amount of line separation between margins;
  
  var repeat = function repeat(fn, count, args) {
      while (0 < count--)
          fn.apply(this, args);
  };
  
  var ensureScrollMargin = function(editor) {
      var renderer = editor.renderer;
      var pos = renderer.$cursorLayer.getPixelPosition();
  
      var top = pos.top;
  
      var margin = HMARGIN * renderer.layerConfig.lineHeight;
      if (2 * margin > renderer.$size.scrollerHeight)
          margin = renderer.$size.scrollerHeight / 2;
  
      if (renderer.scrollTop > top - margin) {
          renderer.session.setScrollTop(top - margin);
      }
  
      if (renderer.scrollTop + renderer.$size.scrollerHeight < top + margin + renderer.lineHeight) {
          renderer.session.setScrollTop(top + margin + renderer.lineHeight - renderer.$size.scrollerHeight);
      }
  };
  
  var actions = exports.actions = {
      "z": {
          param: true,
          fn: function(editor, range, count, param) {
              switch (param) {
                  case "z":
                      editor.renderer.alignCursor(null, 0.5);
                      break;
                  case "t":
                      editor.renderer.alignCursor(null, 0);
                      break;
                  case "b":
                      editor.renderer.alignCursor(null, 1);
                      break;
                  case "c":
                      editor.session.onFoldWidgetClick(range.start.row, {domEvent:{target :{}}});
                      break;
                  case "o":
                      editor.session.onFoldWidgetClick(range.start.row, {domEvent:{target :{}}});
                      break;
                  case "C":
                      editor.session.foldAll();
                      break;
                  case "O":
                      editor.session.unfold();
                      break;
              }
          }
      },
      "r": {
          param: true,
          fn: function(editor, range, count, param) {
              if (param && param.length) {
                  if (param.length > 1)
                      param = param == "return" ? "\n" : param == "tab" ? "\t" : param;
                  repeat(function() { editor.insert(param); }, count || 1);
                  editor.navigateLeft();
              }
          }
      },
      "R": {
          fn: function(editor, range, count, param) {
              util.insertMode(editor);
              editor.setOverwrite(true);
          }
      },
      "~": {
          fn: function(editor, range, count) {
              repeat(function() {
                  var range = editor.selection.getRange();
                  if (range.isEmpty())
                      range.end.column++;
                  var text = editor.session.getTextRange(range);
                  var toggled = text.toUpperCase();
                  if (toggled == text)
                      editor.navigateRight();
                  else
                      editor.session.replace(range, toggled);
              }, count || 1);
          }
      },
      "*": {
          fn: function(editor, range, count, param) {
              editor.selection.selectWord();
              editor.findNext();
              ensureScrollMargin(editor);
              var r = editor.selection.getRange();
              editor.selection.setSelectionRange(r, true);
          }
      },
      "#": {
          fn: function(editor, range, count, param) {
              editor.selection.selectWord();
              editor.findPrevious();
              ensureScrollMargin(editor);
              var r = editor.selection.getRange();
              editor.selection.setSelectionRange(r, true);
          }
      },
      "m": {
          param: true,
          fn: function(editor, range, count, param) {
              var s =  editor.session;
              var markers = s.vimMarkers || (s.vimMarkers = {});
              var c = editor.getCursorPosition();
              if (!markers[param]) {
                  markers[param] = editor.session.doc.createAnchor(c);
              }
              markers[param].setPosition(c.row, c.column, true);
          }
      },
      "n": {
          fn: function(editor, range, count, param) {
              var options = editor.getLastSearchOptions();
              options.backwards = false;
  
              editor.selection.moveCursorRight();
              editor.selection.clearSelection();
              editor.findNext(options);
  
              ensureScrollMargin(editor);
              var r = editor.selection.getRange();
              r.end.row = r.start.row;
              r.end.column = r.start.column;
              editor.selection.setSelectionRange(r, true);
          }
      },
      "N": {
          fn: function(editor, range, count, param) {
              var options = editor.getLastSearchOptions();
              options.backwards = true;
  
              editor.findPrevious(options);
              ensureScrollMargin(editor);
              var r = editor.selection.getRange();
              r.end.row = r.start.row;
              r.end.column = r.start.column;
              editor.selection.setSelectionRange(r, true);
          }
      },
      "v": {
          fn: function(editor, range, count, param) {
              editor.selection.selectRight();
              util.visualMode(editor, false);
          },
          acceptsMotion: true
      },
      "V": {
          fn: function(editor, range, count, param) {
              //editor.selection.selectLine();
              //editor.selection.selectLeft();
              var row = editor.getCursorPosition().row;
              editor.selection.moveTo(row, 0);
              editor.selection.selectLineEnd();
              editor.selection.visualLineStart = row;
  
              util.visualMode(editor, true);
          },
          acceptsMotion: true
      },
      "Y": {
          fn: function(editor, range, count, param) {
              util.copyLine(editor);
          }
      },
      "p": {
          fn: function(editor, range, count, param) {
              var defaultReg = registers._default;
  
              editor.setOverwrite(false);
              if (defaultReg.isLine) {
                  var pos = editor.getCursorPosition();
                  pos.column = editor.session.getLine(pos.row).length;
                  var text = lang.stringRepeat("\n" + defaultReg.text, count || 1);
                  editor.session.insert(pos, text);
                  editor.moveCursorTo(pos.row + 1, 0);
              }
              else {
                  editor.navigateRight();
                  editor.insert(lang.stringRepeat(defaultReg.text, count || 1));
                  editor.navigateLeft();
              }
              editor.setOverwrite(true);
              editor.selection.clearSelection();
          }
      },
      "P": {
          fn: function(editor, range, count, param) {
              var defaultReg = registers._default;
              editor.setOverwrite(false);
  
              if (defaultReg.isLine) {
                  var pos = editor.getCursorPosition();
                  pos.column = 0;
                  var text = lang.stringRepeat(defaultReg.text + "\n", count || 1);
                  editor.session.insert(pos, text);
                  editor.moveCursorToPosition(pos);
              }
              else {
                  editor.insert(lang.stringRepeat(defaultReg.text, count || 1));
              }
              editor.setOverwrite(true);
              editor.selection.clearSelection();
          }
      },
      "J": {
          fn: function(editor, range, count, param) {
              var session = editor.session;
              range = editor.getSelectionRange();
              var pos = {row: range.start.row, column: range.start.column};
              count = count || range.end.row - range.start.row;
              var maxRow = Math.min(pos.row + (count || 1), session.getLength() - 1);
  
              range.start.column = session.getLine(pos.row).length;
              range.end.column = session.getLine(maxRow).length;
              range.end.row = maxRow;
  
              var text = "";
              for (var i = pos.row; i < maxRow; i++) {
                  var nextLine = session.getLine(i + 1);
                  text += " " + /^\s*(.*)$/.exec(nextLine)[1] || "";
              }
  
              session.replace(range, text);
              editor.moveCursorTo(pos.row, pos.column);
          }
      },
      "u": {
          fn: function(editor, range, count, param) {
              count = parseInt(count || 1, 10);
              for (var i = 0; i < count; i++) {
                  editor.undo();
              }
              editor.selection.clearSelection();
          }
      },
      "ctrl-r": {
          fn: function(editor, range, count, param) {
              count = parseInt(count || 1, 10);
              for (var i = 0; i < count; i++) {
                  editor.redo();
              }
              editor.selection.clearSelection();
          }
      },
      ":": {
          fn: function(editor, range, count, param) {
              var val = ":";
              if (count > 1)
                  val = ".,.+" + count + val;
              if (editor.showCommandLine)
                  editor.showCommandLine(val);
          }
      },
      "/": {
          fn: function(editor, range, count, param) {
              if (editor.showCommandLine)
                  editor.showCommandLine("/");
          }
      },
      "?": {
          fn: function(editor, range, count, param) {
              if (editor.showCommandLine)
                  editor.showCommandLine("?");
          }
      },
      ".": {
          fn: function(editor, range, count, param) {
              util.onInsertReplaySequence = inputBuffer.lastInsertCommands;
              var previous = inputBuffer.previous;
              if (previous) // If there is a previous action
                  inputBuffer.exec(editor, previous.action, previous.param);
          }
      },
      "ctrl-x": {
          fn: function(editor, range, count, param) {
              editor.modifyNumber(-(count || 1));
          }
      },
      "ctrl-a": {
          fn: function(editor, range, count, param) {
              editor.modifyNumber(count || 1);
          }
      }
  };
  
  var inputBuffer = exports.inputBuffer = {
      accepting: [NUMBER, OPERATOR, MOTION, ACTION],
      currentCmd: null,
      //currentMode: 0,
      currentCount: "",
      status: "",
  
      // Types
      operator: null,
      motion: null,
  
      lastInsertCommands: [],
  
      push: function(editor, ch, keyId) {
          var status = this.status;
          var isKeyHandled = true;
          this.idle = false;
          var wObj = this.waitingForParam;
          if (/^numpad\d+$/i.test(ch))
              ch = ch.substr(6);
              
          if (wObj) {
              this.exec(editor, wObj, ch);
          }
          // If input is a number (that doesn't start with 0)
          else if (!(ch === "0" && !this.currentCount.length) &&
              (/^\d+$/.test(ch) && this.isAccepting(NUMBER))) {
              // Assuming that ch is always of type String, and not Number
              this.currentCount += ch;
              this.currentCmd = NUMBER;
              this.accepting = [NUMBER, OPERATOR, MOTION, ACTION];
          }
          else if (!this.operator && this.isAccepting(OPERATOR) && operators[ch]) {
              this.operator = {
                  ch: ch,
                  count: this.getCount()
              };
              this.currentCmd = OPERATOR;
              this.accepting = [NUMBER, MOTION, ACTION];
              this.exec(editor, { operator: this.operator });
          }
          else if (motions[ch] && this.isAccepting(MOTION)) {
              this.currentCmd = MOTION;
  
              var ctx = {
                  operator: this.operator,
                  motion: {
                      ch: ch,
                      count: this.getCount()
                  }
              };
  
              if (motions[ch].param)
                  this.waitForParam(ctx);
              else
                  this.exec(editor, ctx);
          }
          else if (alias[ch] && this.isAccepting(MOTION)) {
              alias[ch].operator.count = this.getCount();
              this.exec(editor, alias[ch]);
          }
          else if (actions[ch] && this.isAccepting(ACTION)) {
              var actionObj = {
                  action: {
                      fn: actions[ch].fn,
                      count: this.getCount()
                  }
              };
  
              if (actions[ch].param) {
                  this.waitForParam(actionObj);
              }
              else {
                  this.exec(editor, actionObj);
              }
  
              if (actions[ch].acceptsMotion)
                  this.idle = false;
          }
          else if (this.operator) {
              this.operator.count = this.getCount();
              this.exec(editor, { operator: this.operator }, ch);
          }
          else {
              isKeyHandled = ch.length == 1;
              this.reset();
          }
          
          if (this.waitingForParam || this.motion || this.operator) {
              this.status += ch;
          } else if (this.currentCount) {
              this.status = this.currentCount;
          } else if (this.status) {
              this.status = "";
          }
          if (this.status != status)
              editor._emit("changeStatus");
          return isKeyHandled;
      },
  
      waitForParam: function(cmd) {
          this.waitingForParam = cmd;
      },
  
      getCount: function() {
          var count = this.currentCount;
          this.currentCount = "";
          return count && parseInt(count, 10);
      },
  
      exec: function(editor, action, param) {
          var m = action.motion;
          var o = action.operator;
          var a = action.action;
  
          if (!param)
              param = action.param;
  
          if (o) {
              this.previous = {
                  action: action,
                  param: param
              };
          }
  
          if (o && !editor.selection.isEmpty()) {
              if (operators[o.ch].selFn) {
                  operators[o.ch].selFn(editor, editor.getSelectionRange(), o.count, param);
                  this.reset();
              }
              return;
          }
  
          // There is an operator, but no motion or action. We try to pass the
          // current ch to the operator to see if it responds to it (an example
          // of this is the 'dd' operator).
          else if (!m && !a && o && param) {
              operators[o.ch].fn(editor, null, o.count, param);
              this.reset();
          }
          else if (m) {
              var run = function(fn) {
                  if (fn && typeof fn === "function") { // There should always be a motion
                      if (m.count && !motionObj.handlesCount)
                          repeat(fn, m.count, [editor, null, m.count, param]);
                      else
                          fn(editor, null, m.count, param);
                  }
              };
  
              var motionObj = motions[m.ch];
              var selectable = motionObj.sel;
  
              if (!o) {
                  if ((util.onVisualMode || util.onVisualLineMode) && selectable)
                      run(motionObj.sel);
                  else
                      run(motionObj.nav);
              }
              else if (selectable) {
                  repeat(function() {
                      run(motionObj.sel);
                      operators[o.ch].fn(editor, editor.getSelectionRange(), o.count, param);
                  }, o.count || 1);
              }
              this.reset();
          }
          else if (a) {
              a.fn(editor, editor.getSelectionRange(), a.count, param);
              this.reset();
          }
          handleCursorMove(editor);
      },
  
      isAccepting: function(type) {
          return this.accepting.indexOf(type) !== -1;
      },
  
      reset: function() {
          this.operator = null;
          this.motion = null;
          this.currentCount = "";
          this.status = "";
          this.accepting = [NUMBER, OPERATOR, MOTION, ACTION];
          this.idle = true;
          this.waitingForParam = null;
      }
  };
  
  function setPreviousCommand(fn) {
      inputBuffer.previous = { action: { action: { fn: fn } } };
  }
  
  exports.coreCommands = {
      start: {
          exec: function start(editor) {
              util.insertMode(editor);
              setPreviousCommand(start);
          }
      },
      startBeginning: {
          exec: function startBeginning(editor) {
              editor.navigateLineStart();
              util.insertMode(editor);
              setPreviousCommand(startBeginning);
          }
      },
      // Stop Insert mode as soon as possible. Works like typing <Esc> in
      // insert mode.
      stop: {
          exec: function stop(editor) {
              inputBuffer.reset();
              util.onVisualMode = false;
              util.onVisualLineMode = false;
              inputBuffer.lastInsertCommands = util.normalMode(editor);
          }
      },
      append: {
          exec: function append(editor) {
              var pos = editor.getCursorPosition();
              var lineLen = editor.session.getLine(pos.row).length;
              if (lineLen)
                  editor.navigateRight();
              util.insertMode(editor);
              setPreviousCommand(append);
          }
      },
      appendEnd: {
          exec: function appendEnd(editor) {
              editor.navigateLineEnd();
              util.insertMode(editor);
              setPreviousCommand(appendEnd);
          }
      }
  };
  
  var handleCursorMove = exports.onCursorMove = function(editor, e) {
      if (util.currentMode === 'insert' || handleCursorMove.running)
          return;
      else if(!editor.selection.isEmpty()) {
          handleCursorMove.running = true;
          if (util.onVisualLineMode) {
              var originRow = editor.selection.visualLineStart;
              var cursorRow = editor.getCursorPosition().row;
              if(originRow <= cursorRow) {
                  var endLine = editor.session.getLine(cursorRow);
                  editor.selection.moveTo(originRow, 0);
                  editor.selection.selectTo(cursorRow, endLine.length);
              } else {
                  var endLine = editor.session.getLine(originRow);
                  editor.selection.moveTo(originRow, endLine.length);
                  editor.selection.selectTo(cursorRow, 0);
              }
          }
          handleCursorMove.running = false;
          return;
      }
      else {
          if (e && (util.onVisualLineMode || util.onVisualMode)) {
              editor.selection.clearSelection();
              util.normalMode(editor);
          }
  
          handleCursorMove.running = true;
          var pos = editor.getCursorPosition();
          var lineLen = editor.session.getLine(pos.row).length;
  
          if (lineLen && pos.column === lineLen)
              editor.navigateLeft();
          handleCursorMove.running = false;
      }
  };
  });
  