text: /**
    markdeep.js
    Version 0.13
  
    Copyright 2015-2016, Morgan McGuire, http://casual-effects.com
    All rights reserved.
  
    -------------------------------------------------------------
  
    See http://casual-effects.com/markdeep for documentation on how to
    use this script make your plain text documents render beautifully
    in web browsers.
  
    Markdeep was created by Morgan McGuire. It extends the work of:
  
     - John Gruber's original Markdown
     - Ben Hollis' Maruku Markdown dialect
     - Michel Fortin's Markdown Extras dialect
     - Ivan Sagalaev's highlight.js
     - Contributors to the above open source projects
  
    -------------------------------------------------------------
   
    You may use, extend, and redistribute this code under the terms of
    the BSD license at https://opensource.org/licenses/BSD-2-Clause.
  
    Contains highlight.js 9.5.0 (https://github.com/isagalaev/highlight.js) by Ivan
    Sagalaev, which is used for code highlighting. (BSD 3-clause license)
  */
  /**See http://casual-effects.com/markdeep for @license and documentation.
  markdeep.min.js (C) 2016 Morgan McGuire 
  highlight.min.js  (C) 2016 Ivan Sagalaev https://highlightjs.org/*/
  (function() {
  'use strict';
  
  // For minification. This is admittedly scary.
  var _ = String.prototype;
  _.rp = _.replace;
  _.ss = _.substring;
  
  // Regular expression version of String.indexOf
  _.regexIndexOf = function(regex, startpos) {
      var i = this.ss(startpos || 0).search(regex);
      return (i >= 0) ? (i + (startpos || 0)) : i;
  }
  
  /** Enable for debugging to view character bounds in diagrams */
  var DEBUG_SHOW_GRID = false;
  
  /** Overlay the non-empty characters of the original source in diagrams */
  var DEBUG_SHOW_SOURCE = DEBUG_SHOW_GRID;
  
  /** Use to suppress passing through text in diagrams */
  var DEBUG_HIDE_PASSTHROUGH = DEBUG_SHOW_SOURCE;
  
  /** In pixels of lines in diagrams */
  var STROKE_WIDTH = 2;
  
  /** A box of these denotes a diagram */
  var DIAGRAM_MARKER = '*';
  
  // http://stackoverflow.com/questions/1877475/repeat-character-n-times
  var DIAGRAM_START = Array(5 + 1).join(DIAGRAM_MARKER);
  
  /** attribs are optional */
  function entag(tag, content, attribs) {
      return '<' + tag + (attribs ? ' ' + attribs : '') + '>' + content + '</' + tag + '>';
  }
  
  
  function measureFontSize(fontStack) {
      var canvas = document.createElement('canvas');
      var ctx = canvas.getContext('2d');
      ctx.font = '10pt ' + fontStack;
      return ctx.measureText("M").width;
  }
  
  
  var codeFontStack = "Menlo,\'Lucida Console\',monospace";
  var codeFontSize  = 105.1316178 / measureFontSize(codeFontStack) + 'px';
  
  var BODY_STYLESHEET = entag('style', 'body{max-width:680px;' +
      'margin:auto;' +
      'padding:20px;' +
      'text-align:justify;' +
      'line-height:140%; ' +
      '-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-smoothing:antialiased;' +
      'color:#222;' +
      'font-family:Palatino,Georgia,"Times New Roman",serif}');
  
  /** You can embed your own stylesheet AFTER the <script> tags in your
      file to override these defaults. */
  var STYLESHEET = entag('style',
      'body{' +
      'counter-reset: h1 h2 h3 h4 h5 h6' +
      '}' +
                         
      '.md code,pre{' +
      'font-family:' + codeFontStack + ';' +
      'font-size:' + codeFontSize + ';' +
      'line-height:140%' + 
      '}' +
  
      '.md div.title{' +
      'font-size:26px;' +
      'font-weight:800;' +
      'line-height:120%;' +
      'text-align:center' +
      '}' +
  
      '.md div.afterTitles{height:10px}' +
  
      '.md div.subtitle{' +
      'text-align:center' +
      '}' +
      '.md .image{display:inline-block}' +
      '.md div.imagecaption,.md div.tablecaption,.md div.listingcaption{' +
      'margin:0.2em 0 10px;' +
      'font-style:italic' +
      '}' +
  
      '.md div.imagecaption{' +
      'margin-bottom:0' +
      '}' +
  
      '.md img{' +
      'max-width:100%' +
      '}' +
  
       // Justification tends to handle URLs and code blocks poorly
       // when inside of a bullet, so disable it there
      'li{text-align:left};' +
  
       // Force captions on line listings down close and then center them
      '.md div.tilde{' +
      'margin:20px 0 -10px;' +
      'text-align:center' + 
      '}' +
  
      '.md blockquote.fancyquote{' + 
      'margin:25px 0 25px;' +
      'text-align:left;' +
      'line-height:160%' +
      '}' +
  
      '.md blockquote.fancyquote::before{' +
      'content:"\u201C";' +
      'color:#DDD;' +
      'font-family:Times New Roman;' +
      'font-size:45px;' +
      'line-height:0;' +
      'margin-right:6px;' +
      'vertical-align:-0.3em' +
      '}' +
  
      '.md span.fancyquote{' +
      'font-size:118%;' +
      'color:#777;' +
      'font-style:italic' +
      '}' +
  
      '.md span.fancyquote::after{' +
      'content:"\u201D";' +
      'font-style:normal;' +
      'color:#DDD;' +
      'font-family:Times New Roman;' +
      'font-size:45px;' +
      'line-height:0;' +
      'margin-left:6px;' +
      'vertical-align:-0.3em' +
      '}' +
  
      '.md blockquote.fancyquote .author{' +
      'width:100%;' +
      'margin-top:10px;' + 
      'display:inline-block;' +
      'text-align:right' +
      '}' +
  
      '.md small{font-size:60%}' +
  
      '.md div.title,contents,.md .tocHeader,h1,h2,h3,h4,h5,h6,.md .shortTOC,.md .mediumTOC,.nonumberh1,.nonumberh2,.nonumberh3,.nonumberh4,.nonumberh5,.nonumberh6{' +
      'font-family:Verdana,Helvetica,Arial,sans-serif;' +
      'margin:13.4px 0 13.4px;' +
      'padding:15px 0 3px;' +
      'border-top:none;' +
      'clear:both' +
      '}' +
  
      '.md svg.diagram{' +
      'display:block;' +
      'font-family:' + codeFontStack + ';' +
      'font-size:' + codeFontSize + ';' +
      'text-align:center;' +
      'stroke-linecap:round;' +
      'stroke-width:' + STROKE_WIDTH + 'px;'+
      'stroke:#000;' + 
      'fill:#000' +
      '}' +
  
      '.md svg.diagram .opendot{' +
      'fill:#FFF' +
      '}' +
  
      '.md svg.diagram text{' +
      'stroke:none' +
      '}' +
  
      '.md a:link.url{font-family:Georgia,Palatino,\'Times New Roman\'}' +
  
      'h1,.tocHeader,.nonumberh1{' +
      'border-bottom:3px solid;' +
      'font-size:20px;' +
      'font-weight:bold;' +
      '}' +
  
      'h1,.nonumberh1{' +
      'counter-reset: h2 h3 h4 h5 h6' +
      '}' +
  
      'h2,.nonumberh2{' +
      'counter-reset: h3 h4 h5 h6;' +
      'border-bottom:2px solid #999;' +
      'color:#555;' +
      'font-size:18px;' +
      '}' +
  
      'h3,h4,h5,h6,.nonumberh3,.nonumberh4,.nonumberh5,.nonumberh6{' +
      'font-family:Helvetica,Arial,sans-serif;' +
      'color:#555;' +
      'font-size:16px;' +
      '}' +
  
      'h3{counter-reset:h4 h5 h6}' +
      'h4{counter-reset:h5 h6}' +
      'h5{counter-reset:h6}' +
  
      '.md table{' +
      'border-collapse:collapse;' +
      'line-height:140%' +
      '}' +
  
      '.md table.table{' +
      'margin:auto' +
      '}' +
  
      '.md table.calendar{' +
      'width:100%;' +
      'margin:auto;' +
      'font-size:11px;' +
      'font-family:Helvetica,Arial,sans-serif' +
      '}' +
  
      '.md table.calendar th{' +
      'font-size:16px' +
      '}' +
  
      '.md .today{' +
      'background:#ECF8FA' +
      '}' +
  
      '.md .calendar .parenthesized{' +
      'color:#999;' + 
      'font-style:italic' +
      '}' +
  
      '.md div.tablecaption{' +
      'text-align:center' +
      '}' +
  
      '.md table.table th{' +
      'color:#FFF;' +
      'background-color:#AAA;' +
      'border:1px solid #888;' +
       // top right bottom left
      'padding:8px 15px 8px 15px' +
      '}' +
  
      '.md table.table td{' +
       // top right bottom left
      'padding:5px 15px 5px 15px;' +
      'border:1px solid #888' +
      '}' +
  
      '.md table.table tr:nth-child(even){'+
      'background:#EEE' +
      '}' +
  
      '.md pre.tilde{' +
      'border-top: 1px solid #CCC;' + 
      'border-bottom: 1px solid #CCC;' + 
      'padding: 5px 0 5px 20px;' +
      'margin:0 0 30px 0;' +
      'background:#FCFCFC' +
      '}' +
  
      '.md a:link, .md a:visited{color:#38A;text-decoration:none}' +
      '.md a:hover{text-decoration:underline}' +
  
      '.md dt{' +
      'font-weight:700' +
      '}' +
  
      // Don't pad the bottom of definitions in tables
      'dl>.md dd{' +
      'padding:0 0 18px' +
      '}' +
  
       // Extra space around terse definition lists
      '.md dl>table{' +
      'margin:35px 0 30px' + 
      '}' +
  
      '.md code{' +
      'white-space:pre' +
      '}' +
  
      '.md .endnote{' +
      'font-size:13px;' +
      'line-height:15px;' +
      'padding-left:10px;' +
      'text-indent:-10px' +
      '}' +
  
      '.md .bib{' +
      'padding-left:80px;' +
      'text-indent:-80px;' +
      'text-align:left' +
      '}' +
  
      '.markdeepFooter{font-size:9px;text-align:right;padding-top:80px;color:#999}' +
  
      '.md .mediumTOC{float:right;font-size:12px;line-height:15px;border-left:1px solid #CCC;padding-left:15px;margin:15px 0px 15px 25px}' +
  
      '.md .mediumTOC .level1{font-weight:600}' +
  
      '.md .longTOC .level1{font-weight:600;display:block;padding-top:12px;margin:0 0 -20px}' +
       
      '.md .shortTOC{text-align:center;font-weight:bold;margin-top:15px;font-size:14px}');
  
  var MARKDEEP_LINE = '<!-- Markdeep: --><style class="fallback">body{visibility:hidden;white-space:pre;font-family:monospace}</style><script src="markdeep.min.js"></script><script src="https://casual-effects.com/markdeep/latest/markdeep.min.js"></script><script>window.alreadyProcessedMarkdeep||(document.body.style.visibility="visible")</script>';
  
  var MARKDEEP_FOOTER = '<div class="markdeepFooter"><i>formatted by <a href="http://casual-effects.com/markdeep" style="color:#999">Markdeep&nbsp;&nbsp;&nbsp;</a></i><div style="display:inline-block;font-size:13px;font-family:\'Times New Roman\',serif;vertical-align:middle;transform:translate(-3px,-1px)rotate(135deg);">&#x2712;</div></div>';
  
  // Language options:
  var FRENCH = {
      keyword: {
          table:     'tableau',
          figure:    'figure',
          listing:   'liste',
          diagram:   'diagramme',
  
          sec:       'sec',
          section:   'section',
          subsection: 'paragraphe',
  
          Monday:    'lundi',
          Tuesday:   'mardi',
          Wednesday: 'mercredi',
          Thursday:  'jeudi',
          Friday:    'vendredi',
          Saturday:  'samedi',
          Sunday:    'dimanche',
  
          January:   'Janvier',
          February:  'Février',
          March:     'Mars',
          April:     'Avril',
          May:       'Mai',
          June:      'Juin', 
          July:      'Julliet',
          August:    'Août', 
          September: 'Septembre', 
          October:   'Octobre', 
          November:  'Novembre',
          December:  'Décembre',
  
          jan: 'janv',
          feb: 'févr',
          mar: 'mars',
          apr: 'avril',
          may: 'mai',
          jun: 'juin',
          jul: 'juil',
          aug: 'août',
          sep: 'sept',
          oct: 'oct',
          nov: 'nov',
          dec: 'déc'
      }
  };
  
  // Translated by Zdravko Velinov
  var BULGARIAN = {
      keyword: {
          table:     'таблица',
          figure:    'фигура',
          listing:   'списък',
          diagram:   'диаграма',
  
          sec:       'сек',
          section:   'раздел',
          subsection: 'подраздел',
  
          Monday:    'понеделник',
          Tuesday:   'вторник',
          Wednesday: 'сряда',
          Thursday:  'четвъртък',
          Friday:    'петък',
          Saturday:  'събота',
          Sunday:    'неделя',
  
          January:   'януари',
          February:  'февруари',
          March:     'март',
          April:     'април',
          May:       'май',
          June:      'юни', 
          July:      'юли',
          August:    'август', 
          September: 'септември', 
          October:   'октомври', 
          November:  'ноември',
          December:  'декември',
  
          jan: 'ян',
          feb: 'февр',
          mar: 'март',
          apr: 'апр',
          may: 'май',
          jun: 'юни',
          jul: 'юли',
          aug: 'авг',
          sep: 'септ',
          oct: 'окт',
          nov: 'ноем',
          dec: 'дек'
      }
  };
  
  
  var RUSSIAN = {
      keyword: {
          table:     'таблица',
          figure:    'рисунок',
          listing:   'листинг',
          diagram:   'диаграмма',
  
          sec:       'сек',
          section:   'раздел',
          subsection: 'подраздел',
  
          Monday:    'понедельник',
          Tuesday:   'вторник',
          Wednesday: 'среда',
          Thursday:  'четверг',
          Friday:    'пятница',
          Saturday:  'суббота',
          Sunday:    'воскресенье',
  
          January:   'январьr',
          February:  'февраль',
          March:     'март',
          April:     'апрель',
          May:       'май',
          June:      'июнь', 
          July:      'июль',
          August:    'август', 
          September: 'сентябрь', 
          October:   'октябрь', 
          November:  'ноябрь',
          December:  'декабрь',
  
          jan: 'янв',
          feb: 'февр',
          mar: 'март',
          apr: 'апр',
          may: 'май',
          jun: 'июнь',
          jul: 'июль',
          aug: 'авг',
          sep: 'сент',
          oct: 'окт',
          nov: 'ноябрь',
          dec: 'дек'
      }
  };
  
  
  var DEFAULT_OPTIONS = {
      mode:       'markdeep',
      detectMath: true,
      lang:       {keyword:{}}, // English
      tocStyle:   'auto',
      hideEmptyWeekends: true
  };
  
  var LANG_TABLE = {
      ru: RUSSIAN,
      fr: FRENCH,
      bg: BULGARIAN
  // Awaiting localization by a native speaker:
  //    de: GERMAN,
  //    es: SPANISH
  //    ...
  };
  
  [].slice.call(document.getElementsByTagName('meta')).forEach(function(elt) {
      var att = elt.getAttribute('lang');
      if (att) {
          var lang = LANG_TABLE[att];
          if (lang) {
              DEFAULT_OPTIONS.lang = lang;
          }
      }
  });
  
  
  var max = Math.max;
  var min = Math.min;
  var abs = Math.abs;
  var sign = Math.sign || function (x) {
      return ( +x === x ) ? ((x === 0) ? x : (x > 0) ? 1 : -1) : NaN;
  };
  
  /** Get an option, or return the corresponding value from DEFAULT_OPTIONS */
  function option(key) {
      if (window.markdeepOptions && (window.markdeepOptions[key] !== undefined)) {
          return window.markdeepOptions[key];
      } else if (DEFAULT_OPTIONS[key] !== undefined) {
          return DEFAULT_OPTIONS[key];
      } else {
          console.warn('Illegal option: "' + key + '"');
          return undefined;
      }
  }
  
  
  // Returns the localized version of word, defaulting to the word itself
  function keyword(word) {
      return option('lang').keyword[word] || word;
  }
  
  /** Converts <>&" to their HTML escape sequences */
  function escapeHTMLEntities(str) {
      return String(str).rp(/&/g, '&amp;').rp(/</g, '&lt;').rp(/>/g, '&gt;').rp(/"/g, '&quot;');
  }
  
  /** Restores the original source string's '<' and '>' as entered in
      the document, before the browser processed it as HTML. There is no
      way in an HTML document to distinguish an entity that was entered
      as an entity.
  */
  function unescapeHTMLEntities(str) {
      // Process &amp; last so that we don't recursively unescape
      // escaped escape sequences.
      return str.
          rp(/&lt;/g, '<').
          rp(/&gt;/g, '>').
          rp(/&quot;/g, '"').
          rp(/&#39;/g, "'").
          rp(/&ndash;/g, '--').
          rp(/&mdash;/g, '---').
          rp(/&amp;/g, '&');
  }
  
  
  function removeHTMLTags(str) {
      return str.rp(/<.*?>/g, '');
  }
  
  
  /** Turn the argument into a legal URL anchor */
  function mangle(text) {
      return encodeURI(text.rp(/\s/g, '').toLowerCase());
  }
  
  /** Creates a style sheet containing elements like:
  
    hn::before { 
      content: counter(h1) "." counter(h2) "." ... counter(hn) " "; 
      counter-increment: hn; 
     } 
  */
  function sectionNumberingStylesheet() {
      var s = '';
  
      for (var i = 1; i <= 6; ++i) {
          s += 'h' + i + '::before {\ncontent:';
          for (var j = 1; j <= i; ++j) {
              s += 'counter(h' + j + ') "' + ((j < i) ? '.' : ' ') + '"';
          }
          s += ';\ncounter-increment: h' + i + ';margin-right:10px}';
      }
  
      return entag('style', s);
  }
  
  /**
     \param node  A node from an HTML DOM
  
     \return A String that is a very good reconstruction of what the
     original source looked like before the browser tried to correct
     it to legal HTML.
   */
  function nodeToMarkdeepSource(node, leaveEscapes) {
      var source = node.innerHTML;
  
      // Markdown uses <john@bar.com> e-mail syntax, which HTML parsing
      // will try to close by inserting the matching close tags at the end of the
      // document. Remove anything that looks like that and comes *after*
      // the first fallback style.
      source = source.rp(/(?:<style class="fallback">[\s\S]*?<\/style>[\s\S]*)<\/\S+@\S+\.\S+?>/gim, '');
      
      // Remove artificially inserted close tags
      source = source.rp(/<\/h?ttps?:.*>/gi, '');
      
      // Now try to fix the URLs themselves, which will be 
      // transformed like this: <http: casual-effects.com="" markdeep="">
      source = source.rp(/<(https?): (.*?)>/gi, function (match, protocol, list) {
  
          // Remove any quotes--they wouldn't have been legal in the URL anyway
          var s = '<' + protocol + '://' + list.rp(/=""\s/g, '/');
  
          if (s.ss(s.length - 3) === '=""') {
              s = s.ss(0, s.length - 3);
          }
  
          // Remove any lingering quotes (since they
          // wouldn't have been legal in the URL)
          s = s.rp(/"/g, '');
  
          return s + '>';
      });
  
      // Remove the "fallback" style tags
      source = source.rp(/<style class=["']fallback["']>.*?<\/style>/gmi, '');
  
      source = unescapeHTMLEntities(source);
  
      return source;
  }
  
  
  /** Extracts one diagram from a Markdown string.
  
      Returns {beforeString, diagramString, alignmentHint, afterString}
      diagramString will be empty if nothing was found. The
      DIAGRAM_MARKER is stripped from the diagramString. 
  
      alignmentHint may be:
      floatleft  
      floatright
      center
      flushleft
  
      diagramString does not include the marker characters. 
      If there is a caption, it will appear in the afterString and not be parsed.
  */
  function extractDiagram(sourceString) {
      function advance() {
          nextLineBeginning = sourceString.indexOf('\n', lineBeginning) + 1;
          textOnLeft  = textOnLeft  || /\S/.test(sourceString.ss(lineBeginning, lineBeginning + xMin));
          textOnRight = textOnRight || /\S/.test(sourceString.ss(lineBeginning + xMax + 1, nextLineBeginning));
      }
  
      var noDiagramResult = {beforeString: sourceString, diagramString: '', alignmentHint: '', afterString: ''};
  
      // Search sourceString for the first rectangle of enclosed
      // DIAGRAM_MARKER characters at least DIAGRAM_START.length wide
      for (var i = sourceString.indexOf(DIAGRAM_START);
           i >= 0; 
           i = sourceString.indexOf(DIAGRAM_START, i + DIAGRAM_START.length)) {
  
          // Is this a diagram? Try following it around
          
          // Look backwards to find the beginning of the line (or of the string)
          // and measure the start character relative to it
          var lineBeginning = max(0, sourceString.lastIndexOf('\n', i)) + 1;
          var xMin = i - lineBeginning;
          
          // Find the first non-diagram character...or the end of the string
          var j;
          for (j = i + DIAGRAM_START.length; sourceString[j] === DIAGRAM_MARKER; ++j) {}
          var xMax = j - lineBeginning - 1;
          
          // We have a potential hit. Start accumulating a result. If there was anything
          // between the newline and the diagram, move it to the after string for proper alignment.
          var result = {
              beforeString: sourceString.ss(0, lineBeginning), 
              diagramString: '',
              alignmentHint: 'center', 
              afterString: sourceString.ss(lineBeginning, i).rp(/[ \t]+$/, ' ')
          };
  
          var nextLineBeginning = 0;
          var textOnLeft = false, textOnRight = false;
  
          advance();
                                      
          // Now, see if the pattern repeats on subsequent lines
          for (var good = true, previousEnding = j; good; ) {
              // Find the next line
              lineBeginning = nextLineBeginning;
              advance();
              if (lineBeginning === 0) {
                  // Hit the end of the string before the end of the pattern
                  return noDiagramResult; 
              }
              
              if (textOnLeft) {
                  // Even if there is text on *both* sides
                  result.alignmentHint = 'floatright';
              } else if (textOnRight) {
                  result.alignmentHint = 'floatleft';
              }
              
              // See if there are markers at the correct locations on the next line
              if ((sourceString[lineBeginning + xMin] === DIAGRAM_MARKER) && 
                  (sourceString[lineBeginning + xMax] === DIAGRAM_MARKER)) {
  
                  // See if there's a complete line of DIAGRAM_MARKER, which would end the diagram
                  for (var x = xMin; (x < xMax) && (sourceString[lineBeginning + x] === DIAGRAM_MARKER); ++x) {}
             
                  var begin = lineBeginning + xMin;
                  var end   = lineBeginning + xMax;
  
                  // Trim any excess whitespace caused by our truncation because Markdown will
                  // interpret that as fixed-formatted lines
                  result.afterString += sourceString.ss(previousEnding, begin).rp(/^[ \t]*[ \t]/, ' ').rp(/[ \t][ \t]*$/, ' ');
                  if (x === xMax) {
                      // We found the last row. Put everything else into
                      // the afterString and return the result.
                  
                      result.afterString += sourceString.ss(lineBeginning + xMax + 1);
                      return result;
                  } else {
                      // A line of a diagram. Extract everything before
                      // the diagram line started into the string of
                      // content to be placed after the diagram in the
                      // final HTML
                      result.diagramString += sourceString.ss(begin + 1, end) + '\n';
                      previousEnding = end + 1;
                  }
              } else {
                  // Found an incorrectly delimited line. Abort
                  // processing of this potential diagram, which is now
                  // known to NOT be a diagram after all.
                  good = false;
              }
          } // Iterate over verticals in the potential box
      } // Search for the start
  
      return noDiagramResult;
  }
  
  /** 
      Find the specified delimiterRegExp used as a quote (e.g., *foo*)
      and replace it with the HTML tag and optional attributes.
  */
  function replaceMatched(string, delimiterRegExp, tag, attribs) {
      var delimiter = delimiterRegExp.source;
      var flanking = '[^ \\t\\n' + delimiter + ']';
      var pattern  = '(' + delimiter + ')' +
          '(' + flanking + '.*?(\\n.+?)*?)' + 
          delimiter + '(?![A-Za-z0-9])';
  
      return string.rp(new RegExp(pattern, 'g'), 
                            '<' + tag + (attribs ? ' ' + attribs : '') +
                            '>$2</' + tag + '>');
  }
      
  /** Maruku ("github")-style table processing */
  function replaceTables(s, protect) {
      var TABLE_ROW       = /(?:\n\|?[ \t\S]+?(?:\|[ \t\S]+?)+\|?(?=\n))/.source;
      var TABLE_SEPARATOR = /\n\|? *\:?-+\:?(?: *\| *\:?-+\:?)+ *\|?(?=\n)/.source;
      var TABLE_CAPTION   = /\n[ \t]*\[[^\n\|]+\][ \t]*(?=\n)/.source;
      var TABLE_REGEXP    = new RegExp(TABLE_ROW + TABLE_SEPARATOR + TABLE_ROW + '+(' + TABLE_CAPTION + ')?', 'g');
  
      function trimTableRowEnds(row) {
          return row.trim().rp(/^\||\|$/g, '');
      }
      
      s = s.rp(TABLE_REGEXP, function (match) {
          // Found a table, actually parse it by rows
          var rowArray = match.split('\n');
          
          var result = '';
          
          // Skip the bogus leading row
          var startRow = (rowArray[0] === '') ? 1 : 0;
  
          var caption = rowArray[rowArray.length - 1].trim();
  
          if ((caption.length > 3) && (caption[0] === '[') && (caption[caption.length - 1] === ']')) {
              // Remove the caption from the row array
              rowArray.pop();
              caption = caption.ss(1, caption.length - 1);
          } else {
              caption = undefined;
          }
  
          // Parse the separator row for left/center/right-indicating colons
          var columnStyle = [];
          trimTableRowEnds(rowArray[startRow + 1]).rp(/:?-+:?/g, function (match) {
              var left = (match[0] === ':');
              var right = (match[match.length - 1] === ':');
              columnStyle.push(protect(' style="text-align:' + ((left && right) ? 'center' : (right ? 'right' : 'left')) + '"'));
          });
          
          var tag = 'th';
          for (var r = startRow; r < rowArray.length; ++r) {
              // Remove leading and trailing whitespace and column delimiters
              var row = trimTableRowEnds(rowArray[r].trim());
              
              var i = 0;
              result += entag('tr', '<' + tag + columnStyle[0] + '>' + 
                              row.rp(/\|/g, function () {
                                  ++i;
                                  return '</' + tag + '><' + tag + columnStyle[i] + '>';
                              }) + '</' + tag + '>') + '\n';
              
              // Skip the header-separator row
              if (r == startRow) { 
                  ++r; 
                  tag = 'td';
              }
          }
          
          result = entag('table', result, protect('class="table"'));
  
          if (caption) {
              result = entag('div', caption, protect('class="tablecaption"')) + result;
          }
  
          return result;
      });
  
      return s;
  }
  
  
  function replaceLists(s, protect) {
      // Identify list blocks:
      // Blank line or line ending in colon, line that starts with 1.,*,+, or -,
      // and then any number of lines until another blank line
      var BLANK_LINES = /^\s*\n/.source;
      
      // Preceding line ending in a colon
      var PREFIX     = /[:,]\s*\n/.source;
      var LIST_BLOCK_REGEXP = 
          new RegExp('(' + PREFIX + '|' + BLANK_LINES + ')' +
                     /((?:[ \t]*(?:\d+\.|-|\+|\*)(?:[ \t]+.+\n\n?)+)+)/.source, 'gm');
  
      var keepGoing = true;
  
      var ATTRIBS = {'+': protect('class="plus"'), '-': protect('class="minus"'), '*': protect('class="asterisk"')};
      var NUMBER_ATTRIBS = protect('class="number"');
  
      // Sometimes the list regexp grabs too much because subsequent
      // lines are indented *less* than the first line. So, if that case
      // is found, re-run the regexp.
      while (keepGoing) {
          keepGoing = false;
          s = s.rp(LIST_BLOCK_REGEXP, function (match, prefix, block) {
              var result = prefix;
              
              // Contains {indentLevel, tag}
              var stack = [];
              var current = {indentLevel: -1};
              
              /* function logStack(stack) {
                 var s = '[';
                 stack.forEach(function(v) { s += v.indentLevel + ', '; });
                 console.log(s.ss(0, s.length - 2) + ']');
                 } */
              
              block.split('\n').forEach(function (line) {
                  var trimmed     = line.rp(/^\s*/, '');
                  
                  var indentLevel = line.length - trimmed.length;
                  
                  // Add a CSS class based on the type of list bullet
                  var attribs = ATTRIBS[trimmed[0]];
                  var isUnordered = !! attribs; // attribs !== undefined
                  attribs = attribs || NUMBER_ATTRIBS;
                  var isOrdered   = /^\d+\.[ \t]/.test(trimmed);
  
                  // If not ordered or unordered, we're just looking at a blank line
                  
                  if (! current) {
                      // Went above top-level indent
                      result += '\n' + line;
                  } else if (! isOrdered && ! isUnordered) {
                      // Continued line
                      result += '\n' + current.indentChars + line;
                  } else {
                      if (indentLevel !== current.indentLevel) {
                          // Enter or leave indentation level
                          if ((current.indentLevel !== -1) && (indentLevel < current.indentLevel)) {
                              while (current && (indentLevel < current.indentLevel)) {
                                  stack.pop();
                                  // End the current list and decrease indentation
                                  result += '</li></' + current.tag + '>';
                                  current = stack[stack.length - 1];
                              }
                          } else {
                              // Start a new list that is more indented
                              current = {indentLevel: indentLevel,
                                         tag:         isOrdered ? 'ol' : 'ul',
                                         indentChars: line.ss(0, indentLevel)};
                              stack.push(current);
                              result += '<' + current.tag + '>';
                          }
                      } else if (current.indentLevel !== -1) {
                          // End previous list item, if there was one
                          result += '</li>';
                      } // Indent level changed
                      
                      if (current) {
                          // Add the list item
                          result += '\n' + current.indentChars + '<li ' + attribs + '>' + trimmed.rp(/^(\d+\.|-|\+|\*) /, '');
                      } else {
                          // Just reached something that is *less* indented than the root--
                          // copy forward and then re-process that list
                          result += '\n' + line;
                          keepGoing = true;
                      }
                  }
              }); // For each line
  
              // Finish the last item and anything else on the stack (if needed)
              for (current = stack.pop(); current; current = stack.pop()) {
                  result += '</li></' + current.tag + '>\n';
              }
         
              return result;
          });
      } // while keep going
  
      return s;
  }
  
  
  /** 
      Identifies schedule lists, which look like:
  
    date: title
      events
  
    Where date must contain a day, month, and four-number year and may
    also contain a day of the week.  Note that the date must not be
    indented and the events must be indented.
  
    Multiple events per date are permitted.
  */
  function replaceScheduleLists(str, protect) {
      // Must open with something other than indentation or a list
      // marker.  There must be a four-digit number somewhere on the
      // line. Exclude lines that begin with an HTML tag...this will
      // avoid parsing headers that have dates in them.
      var BEGINNING = /^(?:[^\|<>\s-\+\*\d].*[12]\d{3}(?!\d).*?|(?:[12]\d{3}(?!\.).*\d.*?)|(?:\d{1,3}(?!\.).*[12]\d{3}(?!\d).*?))/.source;
  
      // There must be at least one more number in a date, a colon, and then some more text
      var DATE_AND_TITLE = '(' + BEGINNING + '):' + /[ \t]+([^ \t\n].*)\n/.source;
  
      // The body of the schedule item. It may begin with a blank line and contain
      // multiple paragraphs separated by blank lines...as long as there is indenting
      var EVENTS = /(?:[ \t]*\n)?((?:[ \t]+.+\n(?:[ \t]*\n){0,3})*)/.source;
      var ENTRY = DATE_AND_TITLE + EVENTS;
  
      var ENTRY_REGEXP = new RegExp(ENTRY, 'gm');
  
      var rowAttribs = protect('valign="top"');
      var dateTDAttribs = protect('style="width:100px;padding-right:15px" rowspan="2"');
      var eventTDAttribs = protect('style="padding-bottom:25px"');
  
      var DAY_NAME   = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'].map(keyword);
      var MONTH_NAME = ['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug', 'sep', 'oct', 'nov', 'dec'].map(keyword);
      var MONTH_NAME_LIST = MONTH_NAME.join('|');
      var MONTH_FULL_NAME = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'].map(keyword);
  
      // Used to mark the center of each day. Not close to midnight to avoid daylight
      // savings problems.
      var standardHour = 9;
  
      try {
          var scheduleNumber = 0;
          str = 
              str.rp(new RegExp('(' + ENTRY + '){2,}', 'gm'),
                     function (schedule) {
                         ++scheduleNumber;
  
                         // Each entry has the form {date:date, title:string, text:string}
                         var entryArray = [];
  
                         // Now parse the schedule into individual day entries
  
                         var anyWeekendEvents = false;
  
                         schedule.rp(ENTRY_REGEXP,
                                     function (entry, date, title, events) {
                                         // Remove the day from the date (we'll reconstruct it below). This is actually unnecessary, since we
                                         // explicitly compute the value anyway and the parser is robust to extra characters, but it aides
                                         // in debugging.
                                         // 
                                         // date = date.rp(/(?:(?:sun|mon|tues|wednes|thurs|fri|satur)day|(?:sun|mon|tue|wed|thu|fri|sat)\.?|(?:su|mo|tu|we|th|fr|sa)),?/gi, '');
                                         
                                         // Parse the date. The Javascript Date class's parser is useless because it
                                         // is locale dependent, so we do this with a regexp.
                                         
                                         var year = '', month = '', day = '', parenthesized = false;
  
                                         date = date.trim();
  
                                         if ((date[0] === '(') && (date.slice(-1) === ')')) {
                                             // This is a parenthesized entry
                                             date = date.slice(1, -1);
                                             parenthesized = true;
                                         }
  
                                         // DD MM YYYY
                                         var match = date.match(RegExp('([0123]?\\d)\\D+([01]?\\d|' + MONTH_NAME_LIST + ')\\D+([12]\\d{3})', 'i'));
                                         
                                         if (match) {
                                             day = match[1]; month = match[2]; year = match[3];
                                         } else {
                                             // YYYY MM DD
                                             match = date.match(RegExp('([12]\\d{3})\\D+([01]?\\d|' + MONTH_NAME_LIST + ')\\D+([0123]?\\d)', 'i')); 
                                             if (match) {
                                                 day = match[3]; month = match[2]; year = match[1];
                                             } else {
                                                 // monthname day year
                                                 match = date.match(RegExp('(' + MONTH_NAME_LIST + ')\\D+([0123]?\\d)\\D+([12]\\d{3})', 'i'));
                                                 if (match) {
                                                     day = match[2]; month = match[1]; year = match[3];
                                                 } else {
                                                     throw "Could not parse date";
                                                 }
                                             }
                                         }
                                         
                                         // Reconstruct standardized date format
                                         date = day + ' ' + month + ' ' + year;
                                         
                                         // Detect the month
                                         var monthNumber = parseInt(month) - 1;
                                         if (isNaN(monthNumber)) {
                                             monthNumber = MONTH_NAME.indexOf(month.toLowerCase());
                                         }
                                         
                                         var dateVal = new Date(Date.UTC(parseInt(year), monthNumber, parseInt(day), standardHour));
                                         // Reconstruct the day of the week
                                         var dayOfWeek = dateVal.getUTCDay();
                                         date = DAY_NAME[dayOfWeek] + '<br/>' + date;
                                         
                                         anyWeekendEvents = anyWeekendEvents || (dayOfWeek === 0) || (dayOfWeek === 6);
  
                                         entryArray.push({date: dateVal, 
                                                          title: title,
                                                          sourceOrder: entryArray.length,
                                                          parenthesized: parenthesized,
  
                                                          // Don't show text if parenthesized with no body
                                                          text: parenthesized ? '' :
                                                          entag('tr',
                                                                      entag('td', 
                                                                            '<a ' + protect('name="schedule' + scheduleNumber + '_' + dateVal.getUTCFullYear() + '-' + (dateVal.getUTCMonth() + 1) + '-' + dateVal.getUTCDate() + '"') + '></a>' +
                                                                            date, dateTDAttribs) + 
                                                                      entag('td', entag('b', title)), rowAttribs) + 
                                                          entag('tr', entag('td', '\n\n' + events, eventTDAttribs), rowAttribs)});
                                        
                                         return '';
                                     });
                         
                         // Sort by date
                         entryArray.sort(function (a, b) {
                             // Javascript's sort is not specified to be
                             // stable, so we have to preserve
                             // sourceOrder in ties.
                             var ta = a.date.getTime();
                             var tb = b.date.getTime();
                             return (ta === tb) ? (a.sourceOrder - b.sourceOrder) : (ta - tb);
                         });
  
                         var MILLISECONDS_PER_DAY = 1000 * 60 * 60 * 24;
  
                         // May be slightly off due to daylight savings time
                         var approximateDaySpan = (entryArray[entryArray.length - 1].date.getTime() - entryArray[0].date.getTime()) / MILLISECONDS_PER_DAY;
                         
                         var today = new Date();
                         // Move back to midnight
                         today = new Date(Date.UTC(today.getUTCFullYear(), today.getUTCMonth(), today.getUTCDate(), standardHour));
  
                         var calendar = '';
                         // Make a calendar view with links, if suitable
                         if ((approximateDaySpan > 14) && (approximateDaySpan / entryArray.length < 16)) {
                             var DAY_HEADER_ATTRIBS = protect('colspan="2" width="14%" style="padding-top:5px;text-align:center;font-style:italic"');
                             var DATE_ATTRIBS       = protect('width="1%" height="30px" style="text-align:right;border:1px solid #EEE;border-right:none;"');
                             var FADED_ATTRIBS      = protect('width="1%" height="30px" style="color:#BBB;text-align:right;"');
                             var ENTRY_ATTRIBS      = protect('width="14%" style="border:1px solid #EEE;border-left:none;"');
                             var PARENTHESIZED_ATTRIBS = protect('class="parenthesized"');
  
                             // Find the first day of the first month
                             var date = entryArray[0].date;
                             var index = 0;
  
                             var hideWeekends = ! anyWeekendEvents && option('hideEmptyWeekends');
                             var showDate = hideWeekends ? function(date) { return (date.getUTCDay() > 0) && (date.getUTCDay() < 6);} : function() { return true; };
                             
                             var sameDay = function (d1, d2) {
                                 // Account for daylight savings time
                                 return (abs(d1.getTime() - d2.getTime()) < MILLISECONDS_PER_DAY / 2);
                             }
  
                             // Go to the first of the month
                             date = new Date(date.getUTCFullYear(), date.getUTCMonth(), 1, standardHour);
  
                             while (date.getTime() < entryArray[entryArray.length - 1].date.getTime()) {
  
                                 // Create the calendar header
                                 calendar += '<table ' + protect('class="calendar"') + '>\n' +
                                     entag('tr', entag('th', MONTH_FULL_NAME[date.getUTCMonth()] + ' ' + date.getUTCFullYear(), protect('colspan="14"'))) + '<tr>';
                                 
                                 (hideWeekends ? DAY_NAME.slice(1, 6) : DAY_NAME).forEach(function (name) {
                                     calendar += entag('td', name, DAY_HEADER_ATTRIBS);
                                 });
                                 calendar += '</tr>';
                                 
                                 // Go back into the previous month to reach a Sunday. Check the time at noon
                                 // to avoid problems with daylight saving time occuring early in the morning
                                 while (date.getUTCDay() !== 0) { 
                                     date = new Date(date.getTime() - MILLISECONDS_PER_DAY); 
                                 }
                                 
                                 // Insert the days from the previous month
                                 if (date.getDate() !== 1) {
                                     calendar += '<tr ' + rowAttribs + '>';
                                     while (date.getDate() !== 1) {
                                         if (showDate(date)) { calendar += '<td ' + FADED_ATTRIBS + '>' + date.getUTCDate() + '</td><td>&nbsp;</td>'; }
                                         date = new Date(date.getTime() + MILLISECONDS_PER_DAY);
                                     }
                                 }
  
                                 // Run until the end of the month
                                 do {
                                     if (date.getUTCDay() === 0) {
                                         // Sunday, start a row
                                         calendar += '<tr ' + rowAttribs + '>';
                                     }
                                     
                                     if (showDate(date)) {
                                         var attribs = '';
                                         if (sameDay(date, today)) {
                                             attribs = protect('class="today"');
                                         }
                                         
                                         // Insert links as needed from entries
                                         var contents = '';
                                         
                                         for (var entry = entryArray[index]; entry && sameDay(entry.date, date); ++index, entry = entryArray[index]) {
                                             if (contents) { contents += '<br/>'; }
                                             if (entry.parenthesized) {
                                                 // Parenthesized with no body, no need for a link
                                                 contents += entag('span', entry.title, PARENTHESIZED_ATTRIBS);
                                             } else {
                                                 contents += entag('a', entry.title, protect('href="#schedule' + scheduleNumber + '_' + date.getUTCFullYear() + '-' + (date.getUTCMonth() + 1) + '-' + date.getUTCDate() + '"'));
                                             }
                                         }
                                         
                                         if (contents) {
                                             calendar += entag('td', entag('b', date.getUTCDate()), DATE_ATTRIBS + attribs) + entag('td', contents, ENTRY_ATTRIBS + attribs);
                                         } else {
                                             calendar += '<td ' + DATE_ATTRIBS + attribs + '></a>' + date.getUTCDate() + '</td><td ' + ENTRY_ATTRIBS + attribs + '> &nbsp; </td>';
                                         }
                                     }                                   
  
                                     if (date.getUTCDay() === 6) {
                                         // Saturday, end a row
                                         calendar += '</tr>';
                                     }
                                     
                                     // Go to (approximately) the next day
                                     date = new Date(date.getTime() + MILLISECONDS_PER_DAY);
                                 } while (date.getUTCDate() > 1);
  
                                 // Finish out the week after the end of the month
                                 if (date.getUTCDay() !== 0) {
                                     while (date.getUTCDay() !== 0) {
                                         if (showDate(date)) { calendar += '<td ' + FADED_ATTRIBS + '>' + date.getUTCDate() + '</td><td>&nbsp</td>'; }
                                         date = new Date(date.getTime() + MILLISECONDS_PER_DAY);
                                     }
                                     
                                     calendar += '</tr>';
                                 }
  
                                 calendar += '</table><br/>\n';
  
                                 // Go to the first of the (new) month
                                 date = new Date(Date.UTC(date.getUTCFullYear(), date.getUTCMonth(), 1, standardHour));
                                 
                             } // Until all days covered
                         } // if add calendar
  
                         // Construct the schedule
                         schedule = '';
                         entryArray.forEach(function (entry) {
                             schedule += entry.text;
                         });
  
                         return calendar + entag('table', schedule, protect('class="schedule"')) + '\n\n';
                     });
      } catch (ignore) {
          // Maybe this wasn't a schedule after all, since we couldn't parse a date
          console.log(ignore);
      }
  
      return str;
  }
  
  
  /**
   Term
   :     description, which might be multiple 
         lines and include blanks.
  
   Next Term
  
  becomes
  
  <dl>
    <dt>Term</dt>
    <dd> description, which might be multiple 
         lines and include blanks.</dd>
    <dt>Next Term</dt>
  </dl>
  
  ... unless it is very short, in which case it becomes a table.
  
  */
  function replaceDefinitionLists(s, protect) {
      var TERM       = /^.+\n:(?=[ \t])/.source;
  
      // Definition can contain multiple paragraphs
      var DEFINITION = '(\s*\n|[: \t].+\n)+';
  
      s = s.rp(new RegExp('(' + TERM + DEFINITION + ')+', 'gm'),
               function (block) {
                   
                   var list = [];
  
                   // Parse the block
                   var currentEntry = null;
   
                   block.split('\n').forEach(function (line, i) {
                       // What kind of line is this?
                       if (line.trim().length === 0) {
                           if (currentEntry) {
                               // Empty line
                               currentEntry.definition += '\n';
                           }
                       } else if (! /\s/.test(line[0]) && (line[0] !== ':')) {
                           currentEntry = {term: line, definition: ''};
                           list.push(currentEntry);
                       } else {
                           // Add the line to the current definition, stripping any single leading ':'
                           if (line[0] === ':') { line = ' ' + line.ss(1); }
                           currentEntry.definition += line + '\n';
                       }
                   });
  
                   var longestDefinition = 0;
                   list.forEach(function (entry) {
                       if (/\n\s*\n/.test(entry.definition.trim())) {
                           // This definition contains multiple paragraphs. Force it into long mode
                           longestDefinition = Infinity;
                       } else {
                           // Normal case
                           longestDefinition = max(longestDefinition, unescapeHTMLEntities(removeHTMLTags(entry.definition)).length);
                       }
                   });
  
                   var result = '';
                   if (longestDefinition < 128) {
                       var rowAttribs = protect('valign=top');
                       // This list has short definitions. Format it as a table
                       list.forEach(function (entry) {
                           result += entag('tr',
                                           entag('td', entag('dt', entry.term)) + 
                                           entag('td', entag('dd', entry.definition)), 
                                           rowAttribs);
                       });
                       result = entag('table', result);
  
                   } else {
                       list.forEach(function (entry) {
                           // Leave *two* blanks at the start of a
                           // definition so that subsequent processing
                           // can detect block formatting within it.
                           result += entag('dt', entry.term) + entag('dd', '\n\n' + entry.definition);
                       });
                   }
  
                   return entag('dl', result);
  
               });
  
      return s;
  }
  
  
  /** Inserts a table of contents in the document and then returns
      [string, table], where the table maps strings to levels. */
  function insertTableOfContents(s, protect) {
  
      // Gather headers for table of contents (TOC). We
      // accumulate a long and short TOC and then choose which
      // to insert at the end.
      var fullTOC = '';
      var shortTOC = '';
      
      // headerCounter[i] is the current counter for header level (i - 1)
      var headerCounter = [0];
      var currentLevel = 0;
      var numAboveLevel1 = 0;
  
      var table = {};
      s = s.rp(/<h([1-6])>(.*?)<\/h\1>/gi, function (header, level, text) {
          level = parseInt(level)
          text = text.trim();
          // If becoming more nested:
          for (var i = currentLevel; i < level; ++i) { headerCounter[i] = 0; }
          
          // If becoming less nested:
          headerCounter.splice(level, currentLevel - level);
          currentLevel = level;
          
          ++headerCounter[currentLevel - 1];
          
          // Generate a unique name for this element
          var number = headerCounter.join('.');
          var name = 'toc' + number;
  
          table[removeHTMLTags(text).trim().toLowerCase()] = number;
  
          // Only insert for the first three levels
          if (level <= 3) {
              // Indent and append (the Array() call generates spaces)
              fullTOC += Array(level).join('&nbsp;&nbsp;') + '<a href="#' + name + '" class="level' + level + '">' + number + '&nbsp; ' + text + '</a><br/>\n';
              
              if (level === 1) {
                  shortTOC += ' &middot; <a href="#' + name + '">' + text + '</a>';
              } else {
                  ++numAboveLevel1;
              }
          }
          
          return entag('a', '', protect('name="' + name + '"')) + header;
      });
  
      if (shortTOC.length > 0) {
          // Strip the leading " &middot; "
          shortTOC = shortTOC.ss(10);
      }
      
      var numLevel1 = headerCounter[0];
      var numHeaders = numLevel1 + numAboveLevel1;
  
      // The location of the first header is indicative of the length of
      // the abstract...as well as where we insert. The first header may be accompanied by
      // <a name> tags, which we want to appear before.
      var firstHeaderLocation = s.regexIndexOf(/((<a\s+\S+><\/a>)\s*)*<h1>/i);
  
      if (firstHeaderLocation === -1) { firstHeaderLocation = 0; }
  
      var AFTER_TITLES = '<div class="afterTitles"><\/div>';
      var insertLocation = s.indexOf(AFTER_TITLES);
      if (insertLocation === -1) {
          insertLocation = 0;
      } else {
          insertLocation += AFTER_TITLES.length;
      }
  
  
      // Which TOC style should we use?
      var tocStyle = option('tocStyle');
  
      var TOC = '';
      if ((tocStyle === 'auto') || (tocStyle === '')) {
          if (((numHeaders < 4) && (numLevel1 <= 1)) || (s.length < 2048)) {
              // No TOC; this document is really short
              tocStyle = 'none';
          } else if ((numLevel1 < 7) && (numHeaders / numLevel1 < 2.5)) {
              // We can use the short TOC
              tocStyle = 'short';
          } else if ((firstHeaderLocation === -1) || (firstHeaderLocation / 55 > numHeaders)) {
              // The abstract is long enough to float alongside, and there
              // are not too many levels.        
              // Insert the medium-length TOC floating
              tocStyle = 'medium';
          } else {
              // This is a long table of contents or a short abstract
              // Insert a long toc...right before the first header
              tocStyle = 'long';
          }
      }
  
      switch (tocStyle) {
      case 'none':
      case '':
          break;
  
      case 'short':
          TOC = '<div class="shortTOC">' + shortTOC + '</div>';
          break;
  
      case 'medium':
          TOC = '<div class="mediumTOC"><center><b>Contents</b></center><p>' + fullTOC + '</p></div>';
          break;
  
      case 'long':
          insertLocation = firstHeaderLocation;
          TOC = '<div class="longTOC"><div class="tocHeader">Contents</div><p>' + fullTOC + '</p></div>';
          break;
  
      default:
          console.log('markdeepOptions.tocStyle = "' + tocStyle + '" specified in your document is not a legal value');
      }
  
      s = s.ss(0, insertLocation) + TOC + s.ss(insertLocation);
  
      return [s, table];
  }
  
  
  function escapeRegExpCharacters(str) {
      return str.rp(/([\.\[\]\(\)\*\+\?\^\$\\\{\}\|])/g, '\\$1');
  }
  
  
  /** Returns true if there are at least two newlines in each of the arguments */
  function isolated(preSpaces, postSpaces) {
      if (preSpaces && postSpaces) {
          preSpaces  = preSpaces.match(/\n/g);
          postSpaces = postSpaces.match(/\n/g);
          return preSpaces && (preSpaces.length > 1) && postSpaces && (postSpaces.length > 1);
      } else {
          return false;
      }
  }
  
  
  /**
      Performs Markdeep processing on str, which must be a string or a
      DOM element.  Returns a string that is the HTML to display for the
      body. The result does not include the header: Markdeep stylesheet
      and script tags for including a math library, or the Markdeep
      signature footer.
  
      Optional argument elementMode defaults to true. This avoids turning a bold first word into a 
      title or introducing a table of contents. Section captions are unaffected by this argument.
      Set elementMode = false if processing a whole document instead of an internal node.
  
   */
  function markdeepToHTML(str, elementMode) {
      // Map names to the number used for end notes, in the order
      // encountered in the text.
      var endNoteTable = {}, endNoteCount = 0;
  
      // Reference links
      var referenceLinkTable = {};
  
      // In the private use area
      var PROTECT_CHARACTER = '\ue010';
      var PROTECT_RADIX     = 36;
      var protectedStringArray = [];
  
      // Gives 1.7M possible sequences in base 36
      var PROTECT_DIGITS    = 4;
  
      var PROTECT_REGEXP    = RegExp(PROTECT_CHARACTER + '[0-9a-z]{' + PROTECT_DIGITS + ',' + PROTECT_DIGITS + '}', 'g');
  
      /** Given an arbitrary string, returns an escaped identifier
          string to temporarily replace it with to prevent Markdeep from
          processing the contents. See expose() */
      function protect(s) {
          var i = (protectedStringArray.push(s) - 1).toString(PROTECT_RADIX);
  
          while (i.length < PROTECT_DIGITS) {
              i = '0' + i;
          }
  
          return PROTECT_CHARACTER + i;
      }
  
      /** Given the escaped identifier string from protect(), returns
          the orginal string. */
      function expose(i) {
          // Strip the escape character and parse, then look up in the
          // dictionary.
          var i = parseInt(i.ss(1), PROTECT_RADIX);
          return protectedStringArray[i];
      }
  
      /** First-class function to pass to String.replace to protect a
          sequence defined by a regular expression. */
      function protector(match, protectee) {
          return protect(protectee);
      }
  
      function protectorWithPrefix(match, prefix, protectee) {
          return prefix + protect(protectee);
      }
  
      function makeHeaderFunc(level) {
          return function (match, header) {
              return '\n<a ' + protect('name="' + mangle(removeHTMLTags(header)) + '"') + 
                  '></a>' + entag('h' + level, header) + '\n\n';
          }
      }
  
      if (elementMode === undefined) { 
          elementMode = true;
      }
      
      if (str.innerHTML !== undefined) {
          str = str.innerHTML;
      }
  
      // Replace pre-formatted script tags that are used to protect
      // less-than signs, e.g., in std::vector<Value>
      str = str.rp(/<script\s+type\s*=\s*['"]preformatted['"]\s*>([\s\S]*?)<\/script>/gi, '$1');
  
      function replaceDiagrams(str) {
          var result = extractDiagram(str);
          if (result.diagramString) {
              var CAPTION_REGEXP = /^\n*[ \t]*\[[^\n]+\][ \t]*(?=\n)/;
              //console.log(result.afterString.match(CAPTION_REGEXP));
              result.afterString = result.afterString.rp(CAPTION_REGEXP, function (caption) {
                  // Strip whitespace and enclosing brackets from the caption
                  caption = caption.trim();
                  caption = caption.ss(1, caption.length - 1);
                
                  return entag('center', entag('div', caption, protect('class="imagecaption"')));
              });
  
              var diagramSVG = diagramToSVG(result.diagramString, result.alignmentHint);
              return result.beforeString +
                  diagramSVG + '\n' +
                  replaceDiagrams(result.afterString);
          } else {
              return str;
          }
      }
  
      // Prefix a newline so that blocks beginning at the top of the
      // document are processed correctly
      str = '\n\n' + str;
  
      // CODE FENCES, with styles. Do this before other
      // processing so that their code is protected from further
      // Markdown processing
      var stylizeFence = function (cssClass, symbol) {
          var pattern = new RegExp('\n' + symbol + '{3,}(.*)\n([\\s\\S]+?)\n' + symbol + '{3,}\n([ \t]*\\[.*\\])?', 'g');
          str = str.rp(pattern, function(match, lang, sourceCode, caption) {
              var result = '\n';
              if (caption) {
                  caption = caption.trim();
                  result += '<div ' + protect('class="listingcaption ' + cssClass + '"') + '>' + caption.ss(1, caption.length - 1) + '</div>\n';
              }
              lang = lang ? lang.trim() : lang;
              lang = lang ? [lang] : undefined;
              var highlighted = hljs.highlightAuto(sourceCode, lang);
              return result + protect(entag('pre', entag('code', highlighted.value), 'class="listing ' + cssClass + '"')) + '\n';
          });
      };
      
      stylizeFence('tilde', '~');
      stylizeFence('backtick', '`');
  
      // Protect raw <CODE> content
      str = str.rp(/(<code\b.*?<\/code>)/gi, protector);
      
      str = replaceDiagrams(str);
  
      // Protect SVG blocks (including the ones we just inserted)
      str = str.rp(/<svg( .*?)?>([\s\S]*?)<\/svg>/gi, function (match, attribs, body) {
          return '<svg' + protect(attribs) + '>' + protect(body) + '</svg>';
      });
  
      // Protect STYLE blocks
      str = str.rp(/<style>([\s\S]*?)<\/style>/gi, function (match, body) {
          return entag('style', protect(body));
      });
  
      // Protect the very special case of img tags with newlines and
      // breaks in them AND mismatched angle brackets. This happens for
      // gravizo graphs.
      str = str.rp(/<img\s+src=(["'])[\s\S]*?\1\s*>/gi, function (match, quote) {
          // Strip the "<img " and ">", and then protect:
          return "<img " + protect(match.ss(5, match.length - 1)) + ">";
      });
  
      // INLINE CODE: Surrounded in back ticks on a single line.  Do
      // this before any other processing to protect code blocks
      // from further interference. Don't process back ticks inside
      // of code fences. Allow a single newline, but not wrapping
      // further because that might just pick up quotes used as other
      // punctuation across lines. Explicitly exclude cases where the second
      // quote immediately preceeds a number, e.g., the old `97
      str = str.rp(/(`)(.+?(?:\n.+?)?)`(?!\d)/g, entag('code', '$2'));
  
      // CODE: Escape angle brackets inside code blocks (including the
      // ones we just introduced), and then protect the blocks
      // themselves
      str = str.rp(/(<code(?: .*?)?>)([\s\S]*?)<\/code>/gi, function (match, open, inlineCode) {
          return protect(open + escapeHTMLEntities(inlineCode) + '</code>');
      });
  
      // PRE: Protect pre blocks
      str = str.rp(/(<pre\b[\s\S]*?<\/pre>)/gi, protector);
  
      // Protect raw HTML attributes from processing
      str = str.rp(/(<\w[^ \n<>]*?[ \t]+)(.*?)(?=\/?>)/g, protectorWithPrefix);
  
      // Temporarily hide $$ MathJax LaTeX blocks from Markdown processing (this must
      // come before single $ block detection below)
      str = str.rp(/(\$\$[\s\S]+?\$\$)/g, protector);
  
      // Convert LaTeX $ ... $ to MathJax, but verify that this
      // actually looks like math and not just dollar
      // signs. Don't rp double-dollar signs. Do this only
      // outside of protected blocks.
      //
      // Literally: find a non-dollar sign, non-number followed
      // by a dollar sign and a space.  Then, find any number of
      // characters until the same pattern reversed, allowing
      // one punctuation character before the final space. We're
      // trying to exclude things like Canadian 1$ and US $1
      // triggering math mode.
  
      str = str.rp(/((?:[^\w\d]))\$([ \t][^\$]+?[ \t])\$(?![\w\d])/g, '$1\\($2\\)');
  
      // Also allow LaTeX of the form $...$ if the close tag is not US$
      // and there are spaces outside of the dollar signs.
      //
      // Test: " $3 or US$2 and 3$, $x$ $y + \n 2x$ or ($z$) $k$. or $2 or $2".match(pattern) = 
      // ["$x$", "$y +  2x$", "$z$", "$k$"];
      str = str.rp(/((?:[^\w\d]))\$(\S(?:[^\$]*?\S(?!US))??)\$(?![\w\d])/g, '$1\\($2\\)');
  
      // Temporarily hide MathJax LaTeX blocks from Markdown processing
      str = str.rp(/(\\\([\s\S]+?\\\))/g, protector);
      str = str.rp(/(\\begin\{equation\}[\s\S]*?\\end\{equation\})/g, protector);
      str = str.rp(/(\\begin\{eqnarray\}[\s\S]*?\\end\{eqnarray\})/g, protector);
      str = str.rp(/(\\begin\{equation\*\}[\s\S]*?\\end\{equation\*\})/g, protector);
  
      // Setext-style H1: Text with ======== right under it
      str = str.rp(/(?:^|\n)(.+?)\n[ \t]*={3,}[ \t]*\n/g, makeHeaderFunc(1));
      
      // Setext-style H2: Text with -------- right under it
      str = str.rp(/(?:^|\n)(.+?)\n[ \t]*-{3,}[ \t]*\n/g, makeHeaderFunc(2));
  
      // ATX-style headers:
      for (var i = 6; i > 0; --i) {
          str = str.rp(new RegExp(/^[ \t]*/.source + '#{' + i + ',' + i +'}(?:[ \t])([^\n#]+)#*[ \t]*\n', 'gm'), 
                   makeHeaderFunc(i));
  
          str = str.rp(new RegExp(/^[ \t]*/.source + '\\(#{' + i + ',' + i +'}\\)(?:[ \t])([^\n#]+)\\(?#*\\)?\\n[ \t]*\n', 'gm'), 
                       entag('div', '$1', protect('class="nonumberh' + i + '"')));
      }
  
      // HORIZONTAL RULE: * * *, - - -, _ _ _
      str = str.rp(/\n((?:_[ \t]*){3,}|(?:-[ \t]*){3,}|(?:\*[ \t]*){3,})\s*?\n/g, '\n<hr/>\n');
  
      var FANCY_QUOTE = protect('class="fancyquote"');
  
      // FANCY QUOTE in a blockquote:
      // > " .... "
      // >    -- Foo
  
      str = str.rp(/\n>[ \t]*"(.*(?:\n>.*)*)"[ \t]*(?:\n>[ \t]*)?(\n>[ \t]{2,}\S.*)?\n/g,
                   function (match, quote, author) {
                       return entag('blockquote', 
                                    entag('span',
                                          quote.rp(/\n>/g, '\n'), 
                                          FANCY_QUOTE) + 
                                    (author ? entag('span',
                                                    author.rp(/\n>/g, '\n'),
                                                    protect('class="author"')) : ''),
                                    FANCY_QUOTE);
                  });
  
      // BLOCKQUOTE: > in front of a series of lines
      str = str.rp(/(?:\n>.*){2,}/g, function (match) {
          // Strip the leading '>'
          return entag('blockquote', match.rp(/\n>/g, '\n'));
      });
  
  
      // FOOTNOTES/ENDNOTES: [^symbolic name]
      str = str.rp(/\s*\[\^(.*?)\](?!:)/g, function (match, symbolicName) {
          symbolicName = symbolicName.toLowerCase().trim();
  
          if (! (symbolicName in endNoteTable)) {
              ++endNoteCount;
              endNoteTable[symbolicName] = endNoteCount;
          }
  
          return '<sup><a ' + protect('href="#endnote-' + symbolicName + '"') + 
              '>' + endNoteTable[symbolicName] + '</a></sup>';
      });
  
      // CITATIONS: [#symbolicname]
      // The reference:
      str = str.rp(/\[#(.*?)\](?!:)/g, function (match, symbolicName) {
          symbolicName = symbolicName.trim();
          return '[<a ' + protect('href="#citation-' + symbolicName.toLowerCase() + '"') + 
              '>' + symbolicName + '</a>]';
      });
  
      // The bibliography entry:
      str = str.rp(/\n\[#(.*?)\]:((?:.+?\n?)*)/g, function (match, symbolicName, entry) {
          symbolicName = symbolicName.trim();
          return '<div ' + protect('class="bib"') + '>[<a ' + protect('name="citation-' + symbolicName.toLowerCase() + '"') + 
              '></a><b>' + symbolicName + '</b>] ' + entry + '</div>';
      });
  
      // TABLES: line with | over line containing only | and -
      // (process before reference links to avoid ambiguity on the captions)
      str = replaceTables(str, protect);
  
      // REFERENCE-LINKS: [foo][] or [bar][foo] + [foo]: http://foo.com
      str = str.rp(/^\[([^\^#].*?)\]:(.*?)$/gm, function (match, symbolicName, url) {
          referenceLinkTable[symbolicName.toLowerCase().trim()] = url.trim();
          return '';
      });
  
      // E-MAIL ADDRESS: <foo@bar.baz> or foo@bar.baz
      str = str.rp(/(?:<|(?!<)\b)(\S+@(\S+\.)+?\S{3,}?)(?:$|>|(?=<)|(?=\s)(?!>))/g, function (match, addr) {
          return '<a ' + protect('href="mailto:' + addr + '"') + '>' + addr + '</a>';
      });
  
      // Common code for formatting images with and without a caption
      var formatImage = function (ignore, url, attribs) {
          // Detect videos
          attribs = attribs || '';
          var img;
          var hash;
  
          if (/(.mp4|.m4v|.avi|.mpg|.mov)$/i.test(url)) {
              // This is video. Any attributes provided will override the defaults given here
              img = '<video ' + protect('class="markdeep" src="' + url + '"' + attribs + ' width="480px" controls="true"') + '/>';
          } else if (hash = url.match(/^https:\/\/(?:www\.)?(?:youtube\.com\/\S*?v=|youtu\.be\/)([\w\d-]+)(&.*)?$/i)) {
              // Youtube video
              img = '<iframe ' + protect('class="markdeep" src="https://www.youtube.com/embed/' + hash[1] + '"' + attribs + ' width="480px" height="300px" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen') + '></iframe>';
          } else if (hash = url.match(/^https:\/\/(?:www\.)?vimeo.com\/\S*?\/([\w\d-]+)$/i)) {
              // Vimeo video
              img = '<iframe ' + protect('class="markdeep" src="https://player.vimeo.com/video/' + hash[1] + '"' + attribs + ' width="480px" height="300px" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen') + '></iframe>';
          } else {
              // Image
              img = '<img ' + protect('class="markdeep" src="' + url + '"' + attribs) + '/>';
  
              // Check for width or height (or max-width and max-height). If they exist,
              // link this to the full-size image as well.
              if (/\b(width|height)\b/i.test(attribs)) {
                  img = entag('a ', img, protect('href="' + url + '" target="_blank"'));
              }
          }
  
          return img;
      };
  
      // Process links before images so that captions can contain links
  
      // Detect gravizo URLs inside of markdown images and protect them, 
      // which will cause them to be parsed sort-of reasonably. This is
      // a really special case needed to handle the newlines and potential
      // nested parentheses. Use the pattern from http://blog.stevenlevithan.com/archives/regex-recursion
      // (could be extended to multiple nested parens if needed)
      str = str.rp(/\(http:\/\/g.gravizo.com\/g\?((?:[^\(\)]|\([^\(\)]*\))*)\)/gi, function(match, url) {
          return "(http://g.gravizo.com/g?" + encodeURIComponent(url) + ")";
      });
  
      // LINKS: [text](url attribs)
      str = str.rp(/(^|[^!])\[([^\[\]]+?)\]\(([^\)]+?)(\s+[^\)]*?)?\)/g, function (match, pre, text, url, attribs) {
          attribs = attribs || '';
          return pre + '<a ' + protect('href="' + url + '"' + attribs) + '>' + text + '</a>';
      });
  
      // EMPTY LINKS: [](url)
      str = str.rp(/(^|[^!])\[[ \t]*?\]\(([^\)]+?)\)/g, function (match, pre, url) {
          return pre + '<a ' + protect('href="' + url + '"') + '>' + url + '</a>';
      });
  
      // SIMPLE IMAGE: ![](url attribs)
      str = str.rp(/(\s*)!\[\]\(([^\)\s]+)([^\)]*?)?\)(\s*)/g, function (match, preSpaces, url, attribs, postSpaces) {
          var img = formatImage(match, url, attribs);
  
          if (isolated(preSpaces, postSpaces)) {
              // In a block by itself: center
              img = entag('center', img);
          }
  
          return preSpaces + img + postSpaces;
      });
  
  
      // Explicit loop so that the output will be re-processed, preserving spaces between blocks.
      // Note that there is intentionally no global flag on the first regexp since we only want
      // to process the first occurance.
      var loop = true;
      while (loop) {
          loop = false;
          // CAPTIONED IMAGE: ![caption](url attribs)
          str = str.rp(/(\s*)!\[([\s\S]+?)?\]\(([^\)\s]+)([^\)]*?)?\)(\s*)/, function (match, preSpaces, caption, url, attribs, postSpaces) {
              loop = true;
              var divStyle = '';
              
              if (attribs) {
                  // Move any width attribute specification to the box itself
                  attribs = attribs.rp(/((?:max-)?width)\s*:\s*[^;'"]*/g, function (attribMatch, attrib) {
                      divStyle = attribMatch + ';';
                      return attrib + ':100%';
                  });
                  
                  // Move any width style specification to the box itself
                  attribs = attribs.rp(/((?:max-)?width)\s*=\s*('\S+?'|"\S+?")/g, function (attribMatch, attrib, expr) {
                      // Strip the quotes
                      divStyle = attrib + ':' + expr.ss(1, expr.length - 1) + ';';
                      return 'style="width:100%" ';
                  });
              }
              
              var img = formatImage(match, url, attribs);
              
              if (isolated(preSpaces, postSpaces)) {
                  // In its own block: center
                  preSpaces += '<center>';
                  postSpaces = '</center>' + postSpaces;
              } else {
                  // Embedded: float
                  divStyle += 'float:right;margin:4px 0px 0px 25px;'
              }
              
              return preSpaces + 
                  entag('div', img + entag('div', caption, protect('class="imagecaption"')),
                        protect('class="image" style="' + divStyle + '"')) + 
                  postSpaces;
          });
      } // while replacements made
  
  
      // Process these after links, so that URLs with underscores and tildes are protected.
  
      // STRONG: Must run before italic, since they use the
      // same symbols. **b** __b__
      str = replaceMatched(str, /\*\*/, 'strong', protect('class="asterisk"'));
      str = replaceMatched(str, /__/, 'strong', protect('class="underscore"'));
  
      // EM (ITALICS): *i* _i_
      str = replaceMatched(str, /\*/, 'em', protect('class="asterisk"'));
      str = replaceMatched(str, /_/, 'em', protect('class="underscore"'));
      
      // STRIKETHROUGH: ~~text~~
      str = str.rp(/\~\~([^~].*?)\~\~/g, entag('del', '$1'));
  
      // SMART DOUBLE QUOTES: "a -> &ldquo;   z"  -> &rdquo;
      // Allow situations such as "foo"==>"bar" and foo:"bar", but not 3' 9"
      str = str.rp(/(^|[ \t->])(")(?=\w)/gm, '$1&ldquo;');
      str = str.rp(/([A-Za-z\.,:;\?!=<])(")(?=$|\W)/gm, '$1&rdquo;');
      
      // ARROWS:
      str = str.rp(/(\s)==>(\s)/g, '$1&rarr;$2');
      str = str.rp(/(\s)<==(\s)/g, '$1&larr;$2');
  
      // EM DASH: ---
      // (exclude things that look like table delimiters!)
      str = str.rp(/([^-!\:\|])---([^->\:\|])/g, '$1&mdash;$2');
  
      // EN DASH: --
      // (exclude things that look like table delimiters!)
      str = str.rp(/([^-!\:\|])--([^->\:\|])/g, '$1&ndash;$2');
  
      // NUMBER x NUMBER:
      str = str.rp(/(\d+\s?)x(\s?\d+)/g, '$1&times;$2');
  
      // MINUS: -4 or 2 - 1
      str = str.rp(/([\s\(\[<\|])-(\d)/g, '$1&minus;$2');
      str = str.rp(/(\d) - (\d)/g, '$1 &minus; $2');
  
      // EXPONENTS: ^1 ^-1 (no decimal places allowed)
      str = str.rp(/\^([-+]?\d+)\b/g, '<sup>$1</sup>');
  
      // SCHEDULE LISTS: date : title followed by indented content
      str = replaceScheduleLists(str, protect);
  
      // DEFINITION LISTS: Word followed by a colon list
      // Use <dl><dt>term</dt><dd>definition</dd></dl>
      // https://developer.mozilla.org/en-US/docs/Web/HTML/Element/dl
      //
      // Process these before lists so that lists within definition lists
      // work correctly
      str = replaceDefinitionLists(str, protect);
  
      // LISTS: lines with -, +, *, or 1.
      str = replaceLists(str, protect);
  
      // DEGREE: ##-degree
      str = str.rp(/(\d+?)[ \t-]degree(?:s?)/g, '$1&deg;');
  
      // PARAGRAPH: Newline, any amount of space, newline
      str = str.rp(/\n[\s\n]*?\n/g, '\n\n</p><p>\n\n');
  
      // Reference links
      str = str.rp(/\[(.+?)\]\[(.*?)\]/g, function (match, text, symbolicName) {
          // Empty symbolic name is replaced by the text
          if (! symbolicName.trim()) {
              symbolicName = text;
          }
          
          symbolicName = symbolicName.toLowerCase().trim();
          return '<a ' + protect('href="' + referenceLinkTable[symbolicName] + '"') + '>' + text + '</a>';
      });
  
  
      // End notes
      str = str.rp(/\n\[\^(.*?)\]:((?:.+?\n?)*)/g, function (match, symbolicName, note) {
          symbolicName = symbolicName.toLowerCase().trim();
          
          if (symbolicName in endNoteTable) {
              return '\n<div ' + protect('class="endnote"') + '><a ' + 
                  protect('name="endnote-' + symbolicName + '"') + 
                  '></a><sup>' + endNoteTable[symbolicName] + '</sup> ' + note + '</div>';
          } else {
              return "\n";
          }
      });
      
  
      // SECTION LINKS: XXX section, XXX subsection.
      // Do this by rediscovering the headers and then recursively
      // searching for links to them. Process after other
      // forms of links to avoid ambiguity.
      
      var allHeaders = str.match(/<h([1-6])>(.*?)<\/h\1>/gi);
      if (allHeaders) {
          allHeaders.forEach(function (header) {
              header = removeHTMLTags(header.ss(4, header.length - 5)).trim();
              var link = '<a ' + protect('href="#' + mangle(header) + '"') + '>';
              // Search for links to this section
              str = str.rp(RegExp("(\\b" + escapeRegExpCharacters(header) + ")(?=\\s" + keyword('subsection') + "|\\s" + 
                                  keyword('section') + ")", 'gi'),
                           link + "$1</a>"); 
          });
      }
  
      // TABLE, LISTING, and FIGURE LABEL NUMBERING: Figure [symbol]:  Table [symbol]:  Listing [symbol]: Diagram [symbols]:
      var refCounter = {};
      // refTable[ref] = number to link to
      var refTable = {};
      str = str.rp(RegExp(/($|>)\s*/.source + '(' + keyword('figure') + '|' + keyword('table') + '|' + keyword('listing') + '|' + keyword('diagram') + ')' + /\s+\[(.+?)\]:/.source, 'gim'), function (match, prefix, type, ref) {
          type = type.toLowerCase();
          // Increment the counter
          var count = refCounter[type] = (refCounter[type] | 0) + 1;
          var ref = type + '_' + mangle(ref.toLowerCase().trim());
  
          // Store the reference number
          refTable[ref] = count;
          
          return prefix + entag('a', '', protect('name="' + ref + '"')) + entag('b', type[0].toUpperCase() + type.ss(1) + '&nbsp;' + count + ':', protect('style="font-style:normal;"'));
      });
  
      // FIGURE, TABLE, and LISTING references:
      str = str.rp(/\b(figure|fig\.|table|tbl\.|listing|lst.)\s+\[(.+?)\]/gi, function (match, _type, ref) {
          // Fix abbreviations
          var type = _type.toLowerCase();
          switch (type) {
          case 'fig.': type = 'figure'; break;
          case 'tbl.': type = 'table'; break;
          case 'lst.': type = 'listing'; break;
          }
  
          // Clean up the reference
          var ref = type + '_' + mangle(ref.toLowerCase().trim());
          var num = refTable[ref];
          if (num) {
              return '<a ' + protect('href="#' + ref + '"') + '>' + _type + '&nbsp;' + num + '</a>';
          } else {
              return _type + ' ?';
          }
      });
  
      // URL: <http://baz> or http://baz
      // Must be detected after [link]() processing 
      str = str.rp(/(?:<|(?!<)\b)(\w{3,6}:\/\/.+?)(?:$|>|(?=<)|(?=\s)(?!<))/g, function (match, url) {
          return '<a ' + protect('href="' + url + '" class="url"') + '>' + url + '</a>';
      });
  
      if (! elementMode) {
          var TITLE_PATTERN = /^\s*(?:<\/p><p>\s*)<strong.*?>([^ \t\*].*?[^ \t\*])<\/strong>[ \t]*\n/.source;
          
          var ALL_SUBTITLES_PATTERN = /([ {4,}\t][ \t]*\S.*\n)*/.source;
          
          // Detect a bold first line and make it into a title; detect indented lines
          // below it and make them subtitles
          str = str.rp(
              new RegExp(TITLE_PATTERN + ALL_SUBTITLES_PATTERN, 'g'),
              function (match, title) {
                  title = title.trim();
  
                  // rp + RegExp won't give us the full list of
                  // subtitles, only the last one. So, we have to
                  // re-process match.
                  var subtitles = match.ss(match.indexOf('\n', match.indexOf('</strong>')));
                  subtitles = subtitles ? subtitles.rp(/[ \t]*(\S.*?)\n/g, '<div class="subtitle"> $1 </div>\n') : '';
                  
                  // Remove all tags from the title when inside the <TITLE> tag
                  return entag('title', removeHTMLTags(title)) + '<div class="title"> ' + title + 
                      ' </div>\n' + subtitles + '<div class="afterTitles"></div>\n';
              });
      } // if ! noTitles
  
      // Remove any bogus leading close-paragraph tag inserted by our extra newlines
      str = str.rp(/^\s*<\/p>/, '');
  
      if (! elementMode) {
          var temp = insertTableOfContents(str, protect);
          str = temp[0];
          var toc = temp[1];
          // SECTION LINKS: Replace sec. [X], section [X], subsection [X]
          str = str.rp(RegExp('\\b(' + keyword('sec') + '\\.|' + keyword('section') + '|' + keyword('subsection') + ')\\s\\[(.+?)\\]', 'gi'), 
                      function (match, prefix, ref) {
                          var link = toc[ref.toLowerCase().trim()];
                          if (link) {
                              return prefix + '  <a ' + protect('href="#toc' + link + '"') + '>' + link + '</a>';  
                          } else {
                              return prefix + ' ?';
                          }
                      });
      }
  
      // Expose all protected values. We may need to do this
      // recursively, because pre and code blocks can be nested.
      while (str.indexOf(PROTECT_CHARACTER) + 1) {
          str = str.rp(PROTECT_REGEXP, expose);
      }
  
      return '<span class="md">' + entag('p', str) + '</span>';
  }
  
  
  /**
     Adds whitespace at the end of each line of str, so that all lines
     have equal length
  */
  function equalizeLineLengths(str) {
      var lineArray = str.split('\n');
      var longest = 0;
      lineArray.forEach(function(line) {
          longest = max(longest, line.length);
      });
  
      // Worst case spaces needed for equalizing lengths
      // http://stackoverflow.com/questions/1877475/repeat-character-n-times
      var spaces = Array(longest + 1).join(' ');
  
      var result = '';
      lineArray.forEach(function(line) {
          // Append the needed number of spaces onto each line, and
          // reconstruct the output with newlines
          result += line + spaces.ss(line.length) + '\n';
      });
  
      return result;
  }
  
  /** Finds the longest common whitespace prefix of all non-empty lines
      and then removes it */
  function removeLeadingSpace(str) {
      var lineArray = str.split('\n');
  
      var minimum = Infinity;
      lineArray.forEach(function (line) {
          if (line.trim() !== '') {
              // This is a non-empty line
              var spaceArray = line.match(/^([ \t]*)/);
              if (spaceArray) {
                  minimum = min(minimum, spaceArray[0].length);
              }
          }
      });
  
      if (minimum === 0) {
          // No leading space
          return str;
      }
  
      var result = '';
      lineArray.forEach(function(line) {
          // Strip the common spaces
          result += line.ss(minimum) + '\n';
      });
  
      return result;
  }
  
  /** Returns true if this character is a "letter" under the ASCII definition */
  function isASCIILetter(c) {
      var code = c.charCodeAt(0);
      return ((code >= 65) && (code <= 90)) || ((code >= 97) && (code <= 122));
  }
  
  /** Converts diagramString, which is a Markdeep diagram without the
      surrounding asterisks, to SVG (HTML). 
  
      alignmentHint is the float alignment desired for the SVG tag,
      which can be 'floatleft', 'floatright', or ''
   */
  function diagramToSVG(diagramString, alignmentHint) {
      // Clean up diagramString if line endings are ragged
      diagramString = equalizeLineLengths(diagramString);
  
      // Temporarily replace 'o' that is surrounded by other text
      // with another character to avoid processing it as a point 
      // decoration. This will be replaced in the final svg and is
      // faster than checking each neighborhood each time.
      var HIDE_O = '\ue004';
      diagramString = diagramString.rp(/([a-z]|[A-Z])o([a-z]|[A-Z])/g, '$1' + HIDE_O + '$2');
  
      /** Pixels per character */
      var SCALE   = 8;
  
      /** Multiply Y coordinates by this when generating the final SVG
          result to account for the aspect ratio of text files. This
          MUST be 2 */
      var ASPECT = 2;
  
      var DIAGONAL_ANGLE = Math.atan(1.0 / ASPECT) * 180 / Math.PI;
  
      var EPSILON = 1e-6;
  
      // The order of the following is based on rotation angles
      // and is used for ArrowSet.toSVG
      var ARROW_HEAD_CHARACTERS            = '>v<^';
      var POINT_CHARACTERS                 = 'o*';
      var JUMP_CHARACTERS                  = '()';
      var UNDIRECTED_VERTEX_CHARACTERS     = "+";
      var VERTEX_CHARACTERS                = UNDIRECTED_VERTEX_CHARACTERS + ".'";
  
      // GRAY[i] is the Unicode block character for (i+1)/4 level gray
      var GRAY_CHARACTERS = '\u2591\u2592\u2593\u2594\u2589';
  
      // TRI[i] is a right-triangle rotated by 90*i
      var TRI_CHARACTERS  = '\u25E2\u25E3\u25E4\u25E5';
  
      var DECORATION_CHARACTERS            = ARROW_HEAD_CHARACTERS + POINT_CHARACTERS + JUMP_CHARACTERS + GRAY_CHARACTERS + TRI_CHARACTERS;
  
      function isUndirectedVertex(c) { return UNDIRECTED_VERTEX_CHARACTERS.indexOf(c) + 1; }
      function isVertex(c)           { return VERTEX_CHARACTERS.indexOf(c) !== -1; }
      function isTopVertex(c)        { return isUndirectedVertex(c) || (c === '.'); }
      function isBottomVertex(c)     { return isUndirectedVertex(c) || (c === "'"); }
      function isVertexOrLeftDecoration(c){ return isVertex(c) || (c === '<') || isPoint(c); }
      function isVertexOrRightDecoration(c){return isVertex(c) || (c === '>') || isPoint(c); }
      function isArrowHead(c)        { return ARROW_HEAD_CHARACTERS.indexOf(c) + 1; }
      function isGray(c)             { return GRAY_CHARACTERS.indexOf(c) + 1; }
      function isTri(c)              { return TRI_CHARACTERS.indexOf(c) + 1; }
  
      // "D" = Diagonal slash (/), "B" = diagonal Backslash (\)
      // Characters that may appear anywhere on a solid line
      function isSolidHLine(c)       { return (c === '-') || isUndirectedVertex(c) || isJump(c); }
      function isSolidVLineOrJumpOrPoint(c) { return isSolidVLine(c) || isJump(c) || isPoint(c); }
      function isSolidVLine(c)       { return (c === '|') || isUndirectedVertex(c); }
      function isSolidDLine(c)       { return (c === '/') || isUndirectedVertex(c) }
      function isSolidBLine(c)       { return (c === '\\') || isUndirectedVertex(c); }
      function isJump(c)             { return JUMP_CHARACTERS.indexOf(c) + 1; }
      function isPoint(c)            { return POINT_CHARACTERS.indexOf(c) + 1; }
      function isDecoration(c)       { return DECORATION_CHARACTERS.indexOf(c) + 1; }
      function isEmpty(c)            { return c === ' '; }
     
      ///////////////////////////////////////////////////////////////////////////////
      // Math library
  
      /** Invoke as new Vec2(v) to clone or new Vec2(x, y) to create from coordinates.
          Can also invoke without new for brevity. */
      function Vec2(x, y) {
          // Detect when being run without new
          if (! (this instanceof Vec2)) { return new Vec2(x, y); }
  
          if (y === undefined) {
              if (x === undefined) { x = y = 0; } 
              else if (x instanceof Vec2) { y = x.y; x = x.x; }
              else { console.error("Vec2 requires one Vec2 or (x, y) as an argument"); }
          }
          this.x = x;
          this.y = y;
          Object.seal(this);
      }
  
      /** Returns an SVG representation */
      Vec2.prototype.toString = Vec2.prototype.toSVG = 
          function () { return '' + (this.x * SCALE) + ',' + (this.y * SCALE * ASPECT) + ' '; };
  
      /** The grid is */
      function makeGrid(str) {
          /** Converts a "rectangular" string defined by newlines into 2D
              array of characters. Grids are immutable. */
  
          /** Returns ' ' for out of bounds values */
          var grid = function(x, y) {
              if (y === undefined) {
                  if (x instanceof Vec2) { y = x.y; x = x.x; }
                  else { console.error('grid requires either a Vec2 or (x, y)'); }
              }
              
              return ((x >= 0) && (x < grid.width) && (y >= 0) && (y < grid.height)) ?
                  str[y * (grid.width + 1) + x] : ' ';
          };
  
          // Elements are true when consumed
          grid._used   = [];
  
          grid.width   = str.indexOf('\n');
          grid.height  = str.split('\n').length;
          if (str[str.length - 1] === '\n') { --grid.height; }
  
          /** Mark this location. Takes a Vec2 or (x, y) */
          grid.setUsed = function (x, y) {
              if (y === undefined) {
                  if (x instanceof Vec2) { y = x.y; x = x.x; }
                  else { console.error('grid requires either a Vec2 or (x, y)'); }
              }
              if ((x >= 0) && (x < grid.width) && (y >= 0) && (y < grid.height)) {
                  // Match the source string indexing
                  grid._used[y * (grid.width + 1) + x] = true;
              }
          };
          
          grid.isUsed = function (x, y) {
              if (y === undefined) {
                  if (x instanceof Vec2) { y = x.y; x = x.x; }
                  else { console.error('grid requires either a Vec2 or (x, y)'); }
              }
              return (this._used[y * (this.width + 1) + x] === true);
          };
          
          /** Returns true if there is a solid vertical line passing through (x, y) */
          grid.isSolidVLineAt = function (x, y) {
              if (y === undefined) { y = x.x; x = x.x; }
              
              var up = grid(x, y - 1);
              var c  = grid(x, y);
              var dn = grid(x, y + 1);
              
              var uprt = grid(x + 1, y - 1);
              var uplt = grid(x - 1, y - 1);
              
              if (isSolidVLine(c)) {
                  // Looks like a vertical line...does it continue?
                  return (isTopVertex(up)    || (up === '^') || isSolidVLine(up) || isJump(up) ||
                          isBottomVertex(dn) || (dn === 'v') || isSolidVLine(dn) || isJump(dn) ||
                          isPoint(up) || isPoint(dn) || (grid(x, y - 1) === '_') || (uplt === '_') ||
                          (uprt === '_') ||
                          
                          // Special case of 1-high vertical on two curved corners 
                          ((isTopVertex(uplt) || isTopVertex(uprt)) &&
                           (isBottomVertex(grid(x - 1, y + 1)) || isBottomVertex(grid(x + 1, y + 1)))));
                  
              } else if (isTopVertex(c) || (c === '^')) {
                  // May be the top of a vertical line
                  return isSolidVLine(dn) || (isJump(dn) && (c !== '.'));
              } else if (isBottomVertex(c) || (c === 'v')) {
                  return isSolidVLine(up) || (isJump(up) && (c !== "'"));
              } else if (isPoint(c)) {
                  return isSolidVLine(up) || isSolidVLine(dn);
              } 
              
              return false;
          };
      
      
          /** Returns true if there is a solid middle (---) horizontal line
              passing through (x, y). Ignores underscores. */
          grid.isSolidHLineAt = function (x, y) {
              if (y === undefined) { y = x.x; x = x.x; }
              
              var ltlt = grid(x - 2, y);
              var lt   = grid(x - 1, y);
              var c    = grid(x + 0, y);
              var rt   = grid(x + 1, y);
              var rtrt = grid(x + 2, y);
              
              if (isSolidHLine(c) || (isSolidHLine(lt) && isJump(c))) {
                  // Looks like a horizontal line...does it continue? We need three in a row.
                  if (isSolidHLine(lt)) {
                      return isSolidHLine(rt) || isVertexOrRightDecoration(rt) || 
                          isSolidHLine(ltlt) || isVertexOrLeftDecoration(ltlt);
                  } else if (isVertexOrLeftDecoration(lt)) {
                      return isSolidHLine(rt);
                  } else {
                      return isSolidHLine(rt) && (isSolidHLine(rtrt) || isVertexOrRightDecoration(rtrt));
                  }
  
              } else if (c === '<') {
                  return isSolidHLine(rt) && isSolidHLine(rtrt)
                  
              } else if (c === '>') {
                  return isSolidHLine(lt) && isSolidHLine(ltlt);
                  
              } else if (isVertex(c)) {
                  return ((isSolidHLine(lt) && isSolidHLine(ltlt)) || 
                          (isSolidHLine(rt) && isSolidHLine(rtrt)));
              }
              
              return false;
          };
          
          
          /** Returns true if there is a solid backslash line passing through (x, y) */
          grid.isSolidBLineAt = function (x, y) {
              if (y === undefined) { y = x.x; x = x.x; }
              var c = grid(x, y);
              var lt = grid(x - 1, y - 1);
              var rt = grid(x + 1, y + 1);
              
              if (c === '\\') {
                  // Looks like a diagonal line...does it continue? We need two in a row.
                  return (isSolidBLine(rt) || isBottomVertex(rt) || isPoint(rt) || (rt === 'v') ||
                          isSolidBLine(lt) || isTopVertex(lt) || isPoint(lt) || (lt === '^') ||
                          (grid(x, y - 1) === '/') || (grid(x, y + 1) === '/') || (rt === '_') || (lt === '_')); 
              } else if (c === '.') {
                  return (rt === '\\');
              } else if (c === "'") {
                  return (lt === '\\');
              } else if (c === '^') {
                  return rt === '\\';
              } else if (c === 'v') {
                  return lt === '\\';
              } else if (isVertex(c) || isPoint(c) || (c === '|')) {
                  return isSolidBLine(lt) || isSolidBLine(rt);
              }
          };
          
  
          /** Returns true if there is a solid diagonal line passing through (x, y) */
          grid.isSolidDLineAt = function (x, y) {
              if (y === undefined) { y = x.x; x = x.x; }
              
              var c = grid(x, y);
              var lt = grid(x - 1, y + 1);
              var rt = grid(x + 1, y - 1);
              
              if (c === '/' && ((grid(x, y - 1) === '\\') || (grid(x, y + 1) === '\\'))) {
                  // Special case of tiny hexagon corner
                  return true;
              } else if (isSolidDLine(c)) {
                  // Looks like a diagonal line...does it continue? We need two in a row.
                  return (isSolidDLine(rt) || isTopVertex(rt) || isPoint(rt) || (rt === '^') || (rt === '_') ||
                          isSolidDLine(lt) || isBottomVertex(lt) || isPoint(lt) || (lt === 'v') || (lt === '_')); 
              } else if (c === '.') {
                  return (lt === '/');
              } else if (c === "'") {
                  return (rt === '/');
              } else if (c === '^') {
                  return lt === '/';
              } else if (c === 'v') {
                  return rt === '/';
              } else if (isVertex(c) || isPoint(c) || (c === '|')) {
                  return isSolidDLine(lt) || isSolidDLine(rt);
              }
              return false;
          };
          
          grid.toString = function () { return str; };
          
          return Object.freeze(grid);
      }
      
      
      /** A 1D curve. If C is specified, the result is a bezier with
          that as the tangent control point */
      function Path(A, B, C, D, dashed) {
          if (! ((A instanceof Vec2) && (B instanceof Vec2))) {
              console.error('Path constructor requires at least two Vec2s');
          }
          this.A = A;
          this.B = B;
          if (C) {
              this.C = C;
              if (D) {
                  this.D = D;
              } else {
                  this.D = C;
              }
          }
  
          this.dashed = dashed || false;
  
          Object.freeze(this);
      }
  
      var _ = Path.prototype;
      _.isVertical = function () {
          return this.B.x === this.A.x;
      };
  
      _.isHorizontal = function () {
          return this.B.y === this.A.y;
      };
  
      /** Diagonal lines look like: / See also backDiagonal */
      _.isDiagonal = function () {
          var dx = this.B.x - this.A.x;
          var dy = this.B.y - this.A.y;
          return (abs(dy + dx) < EPSILON);
      };
  
      _.isBackDiagonal = function () {
          var dx = this.B.x - this.A.x;
          var dy = this.B.y - this.A.y;
          return (abs(dy - dx) < EPSILON);
      };
  
      _.isCurved = function () {
          return this.C !== undefined;
      };
  
      /** Does this path have any end at (x, y) */
      _.endsAt = function (x, y) {
          if (y === undefined) { y = x.y; x = x.x; }
          return ((this.A.x === x) && (this.A.y === y)) ||
              ((this.B.x === x) && (this.B.y === y));
      };
  
      /** Does this path have an up end at (x, y) */
      _.upEndsAt = function (x, y) {
          if (y === undefined) { y = x.y; x = x.x; }
          return this.isVertical() && (this.A.x === x) && (min(this.A.y, this.B.y) === y);
      };
  
      /** Does this path have an up end at (x, y) */
      _.diagonalUpEndsAt = function (x, y) {
          if (! this.isDiagonal()) { return false; }
          if (y === undefined) { y = x.y; x = x.x; }
          if (this.A.y < this.B.y) {
              return (this.A.x === x) && (this.A.y === y);
          } else {
              return (this.B.x === x) && (this.B.y === y);
          }
      };
  
      /** Does this path have a down end at (x, y) */
      _.diagonalDownEndsAt = function (x, y) {
          if (! this.isDiagonal()) { return false; }
          if (y === undefined) { y = x.y; x = x.x; }
          if (this.B.y < this.A.y) {
              return (this.A.x === x) && (this.A.y === y);
          } else {
              return (this.B.x === x) && (this.B.y === y);
          }
      };
  
      /** Does this path have an up end at (x, y) */
      _.backDiagonalUpEndsAt = function (x, y) {
          if (! this.isBackDiagonal()) { return false; }
          if (y === undefined) { y = x.y; x = x.x; }
          if (this.A.y < this.B.y) {
              return (this.A.x === x) && (this.A.y === y);
          } else {
              return (this.B.x === x) && (this.B.y === y);
          }
      };
  
      /** Does this path have a down end at (x, y) */
      _.backDiagonalDownEndsAt = function (x, y) {
          if (! this.isBackDiagonal()) { return false; }
          if (y === undefined) { y = x.y; x = x.x; }
          if (this.B.y < this.A.y) {
              return (this.A.x === x) && (this.A.y === y);
          } else {
              return (this.B.x === x) && (this.B.y === y);
          }
      };
  
      /** Does this path have a down end at (x, y) */
      _.downEndsAt = function (x, y) {
          if (y === undefined) { y = x.y; x = x.x; }
          return this.isVertical() && (this.A.x === x) && (max(this.A.y, this.B.y) === y);
      };
  
      /** Does this path have a left end at (x, y) */
      _.leftEndsAt = function (x, y) {
          if (y === undefined) { y = x.y; x = x.x; }
          return this.isHorizontal() && (this.A.y === y) && (min(this.A.x, this.B.x) === x);
      };
  
      /** Does this path have a right end at (x, y) */
      _.rightEndsAt = function (x, y) {
          if (y === undefined) { y = x.y; x = x.x; }
          return this.isHorizontal() && (this.A.y === y) && (max(this.A.x, this.B.x) === x);
      };
  
      _.verticalPassesThrough = function (x, y) {
          if (y === undefined) { y = x.y; x = x.x; }
          return this.isVertical() && 
              (this.A.x === x) && 
              (min(this.A.y, this.B.y) <= y) &&
              (max(this.A.y, this.B.y) >= y);
      }
  
      _.horizontalPassesThrough = function (x, y) {
          if (y === undefined) { y = x.y; x = x.x; }
          return this.isHorizontal() && 
              (this.A.y === y) && 
              (min(this.A.x, this.B.x) <= x) &&
              (max(this.A.x, this.B.x) >= x);
      }
      
      /** Returns a string suitable for inclusion in an SVG tag */
      _.toSVG = function () {
          var svg = '<path d="M ' + this.A;
  
          if (this.isCurved()) {
              svg += 'C ' + this.C + this.D + this.B;
          } else {
              svg += 'L ' + this.B;
          }
          svg += '" style="fill:none;"';
          if (this.dashed) {
              svg += ' stroke-dasharray="3,6"';
          }
          svg += '/>';
          return svg;
      };
  
  
      /** A group of 1D curves. This was designed so that all of the
          methods can later be implemented in O(1) time, but it
          currently uses O(n) implementations for source code
          simplicity. */
      function PathSet() {
          this._pathArray = [];
      }
  
      var PS = PathSet.prototype;
      PS.insert = function (path) {
          this._pathArray.push(path);
      };
  
      /** Returns a new method that returns true if method(x, y) 
          returns true on any element of _pathAray */
      function makeFilterAny(method) {
          return function(x, y) {
              for (var i = 0; i < this._pathArray.length; ++i) {
                  if (method.call(this._pathArray[i], x, y)) { return true; }
              }
              return false;
          }
      }
  
      // True if an up line ends at these coordinates. Recall that the
      // variable _ is bound to the Path prototype still.
      PS.upEndsAt                = makeFilterAny(_.upEndsAt);
      PS.diagonalUpEndsAt        = makeFilterAny(_.diagonalUpEndsAt);
      PS.backDiagonalUpEndsAt    = makeFilterAny(_.backDiagonalUpEndsAt);
      PS.diagonalDownEndsAt      = makeFilterAny(_.diagonalDownEndsAt);
      PS.backDiagonalDownEndsAt  = makeFilterAny(_.backDiagonalDownEndsAt);
      PS.downEndsAt              = makeFilterAny(_.downEndsAt);
      PS.leftEndsAt              = makeFilterAny(_.leftEndsAt);
      PS.rightEndsAt             = makeFilterAny(_.rightEndsAt);
      PS.endsAt                  = makeFilterAny(_.endsAt);
      PS.verticalPassesThrough   = makeFilterAny(_.verticalPassesThrough);
      PS.horizontalPassesThrough = makeFilterAny(_.horizontalPassesThrough);
  
      /** Returns an SVG string */
      PS.toSVG = function () {
          var svg = '';
          for (var i = 0; i < this._pathArray.length; ++i) {
              svg += this._pathArray[i].toSVG() + '\n';
          }
          return svg;
      };
  
  
      function DecorationSet() {
          this._decorationArray = [];
      }
  
      var DS = DecorationSet.prototype;
  
      /** insert(x, y, type, <angle>)  
          insert(vec, type, <angle>)
  
          angle is the angle in degrees to rotate the result */
      DS.insert = function(x, y, type, angle) {
          if (type === undefined) { type = y; y = x.y; x = x.x; }
  
          if (! isDecoration(type)) {
              console.error('Illegal decoration character: ' + type); 
          }
          var d = {C: Vec2(x, y), type: type, angle:angle || 0};
  
          // Put arrows at the front and points at the back so that
          // arrows always draw under points
  
          if (isPoint(type)) {
              this._decorationArray.push(d);
          } else {
              this._decorationArray.unshift(d);
          }
      };
  
  
      DS.toSVG = function () {
          var svg = '';
          for (var i = 0; i < this._decorationArray.length; ++i) {
              var decoration = this._decorationArray[i];
              var C = decoration.C;
              
              if (isJump(decoration.type)) {
                  // Slide jumps
                  var dx = (decoration.type === ')') ? +0.75 : -0.75;
                  var up  = Vec2(C.x, C.y - 0.5);
                  var dn  = Vec2(C.x, C.y + 0.5);
                  var cup = Vec2(C.x + dx, C.y - 0.5);
                  var cdn = Vec2(C.x + dx, C.y + 0.5);
  
                  svg += '<path d="M ' + dn + ' C ' + cdn + cup + up + '" style="fill:none;"/>';
  
              } else if (isPoint(decoration.type)) {
  
                  svg += '<circle cx="' + (C.x * SCALE) + '" cy="' + (C.y * SCALE * ASPECT) +
                         '" r="' + (SCALE - STROKE_WIDTH) + '" class="' + ((decoration.type === '*') ? 'closed' : 'open') + 'dot"/>';
              } else if (isGray(decoration.type)) {
                  
                  var shade = Math.round((3 - GRAY_CHARACTERS.indexOf(decoration.type)) * 63.75);
                  svg += '<rect x="' + ((C.x - 0.5) * SCALE) + '" y="' + ((C.y - 0.5) * SCALE * ASPECT) + '" width="' + SCALE + '" height="' + (SCALE * ASPECT) + '" fill="rgb(' + shade + ',' + shade + ',' + shade +')"/>';
  
              } else if (isTri(decoration.type)) {
                  // 30-60-90 triangle
                  var index = TRI_CHARACTERS.indexOf(decoration.type);
                  var xs  = 0.5 - (index & 1);
                  var ys  = 0.5 - (index >> 1);
                  xs *= sign(ys);
                  var tip = Vec2(C.x + xs, C.y - ys);
                  var up  = Vec2(C.x + xs, C.y + ys);
                  var dn  = Vec2(C.x - xs, C.y + ys);
                  svg += '<polygon points="' + tip + up + dn + '" style="stroke:none"/>\n';
              } else { // Arrow head
                  var tip = Vec2(C.x + 1, C.y);
                  var up =  Vec2(C.x - 0.5, C.y - 0.35);
                  var dn =  Vec2(C.x - 0.5, C.y + 0.35);
                  svg += '<polygon points="' + tip + up + dn + 
                      '"  style="stroke:none" transform="rotate(' + decoration.angle + ',' + C + ')"/>\n';
              }
          }
          return svg;
      };
  
      ////////////////////////////////////////////////////////////////////////////
  
      function findPaths(grid, pathSet) {
          // Does the line from A to B contain at least one c?
          function lineContains(A, B, c) {
              var dx = sign(B.x - A.x);
              var dy = sign(B.y - A.y);
              var x, y;
  
              for (x = A.x, y = A.y; (x !== B.x) || (y !== B.y); x += dx, y += dy) {
                  if (grid(x, y) === c) { return true; }
              }
  
              // Last point
              return (grid(x, y) === c);
          }
  
          // Find all solid vertical lines. Iterate horizontally
          // so that we never hit the same line twice
          for (var x = 0; x < grid.width; ++x) {
              for (var y = 0; y < grid.height; ++y) {
                  if (grid.isSolidVLineAt(x, y)) {
                      // This character begins a vertical line...now, find the end
                      var A = Vec2(x, y);
                      do  { grid.setUsed(x, y); ++y; } while (grid.isSolidVLineAt(x, y));
                      var B = Vec2(x, y - 1);
                      
                      var up = grid(A);
                      var upup = grid(A.x, A.y - 1);
  
                      if (! isVertex(up) && ((upup === '-') || (upup === '_') || (grid(A.x - 1, A.y - 1) === '_') ||
                                             (grid(A.x + 1, A.y - 1) === '_') || 
                                             isBottomVertex(upup)) || isJump(upup)) {
                          // Stretch up to almost reach the line above (if there is a decoration,
                          // it will finish the gap)
                          A.y -= 0.5;
                      }
  
                      var dn = grid(B);
                      var dndn = grid(B.x, B.y + 1);
                      if (! isVertex(dn) && ((dndn === '-') || isTopVertex(dndn)) || isJump(dndn) ||
                          (grid(B.x - 1, B.y) === '_') || (grid(B.x + 1, B.y) === '_')) {
                          // Stretch down to almost reach the line below
                          B.y += 0.5;
                      }
  
                      // Don't insert degenerate lines
                      if ((A.x !== B.x) || (A.y !== B.y)) {
                          pathSet.insert(new Path(A, B));
                      }
  
                      // Continue the search from the end value y+1
                  } 
  
                  // Some very special patterns for the short lines needed on
                  // circuit diagrams. Only invoke these if not also on a curve
                  //      _  _    
                  //    -'    '-
                  else if ((grid(x, y) === "'") &&
                      (((grid(x - 1, y) === '-') && (grid(x + 1, y - 1) === '_') &&
                       ! isSolidVLineOrJumpOrPoint(grid(x - 1, y - 1))) ||
                       ((grid(x - 1, y - 1) === '_') && (grid(x + 1, y) === '-') &&
                       ! isSolidVLineOrJumpOrPoint(grid(x + 1, y - 1))))) {
                      pathSet.insert(new Path(Vec2(x, y - 0.5), Vec2(x, y)));
                  }
  
                  //    _.-  -._ 
                  else if ((grid(x, y) === '.') &&
                           (((grid(x - 1, y) === '_') && (grid(x + 1, y) === '-') && 
                             ! isSolidVLineOrJumpOrPoint(grid(x + 1, y + 1))) ||
                            ((grid(x - 1, y) === '-') && (grid(x + 1, y) === '_') &&
                             ! isSolidVLineOrJumpOrPoint(grid(x - 1, y + 1))))) {
                      pathSet.insert(new Path(Vec2(x, y), Vec2(x, y + 0.5)));
                  }
  
              } // y
          } // x
          
          // Find all solid horizontal lines 
          for (var y = 0; y < grid.height; ++y) {
              for (var x = 0; x < grid.width; ++x) {
                  if (grid.isSolidHLineAt(x, y)) {
                      // Begins a line...find the end
                      var A = Vec2(x, y);
                      do { grid.setUsed(x, y); ++x; } while (grid.isSolidHLineAt(x, y));
                      var B = Vec2(x - 1, y);
  
                      // Detect curves and shorten the edge
                      if ( ! isVertex(grid(A.x - 1, A.y)) && 
                           ((isTopVertex(grid(A)) && isSolidVLineOrJumpOrPoint(grid(A.x - 1, A.y + 1))) ||
                            (isBottomVertex(grid(A)) && isSolidVLineOrJumpOrPoint(grid(A.x - 1, A.y - 1))))) {
                          ++A.x;
                      }
  
                      if ( ! isVertex(grid(B.x + 1, B.y)) && 
                           ((isTopVertex(grid(B)) && isSolidVLineOrJumpOrPoint(grid(B.x + 1, B.y + 1))) ||
                            (isBottomVertex(grid(B)) && isSolidVLineOrJumpOrPoint(grid(B.x + 1, B.y - 1))))) {
                          --B.x;
                      }
  
                      // Don't insert degenerate lines
                      if ((A.x !== B.x) || (A.y !== B.y)) {
                          pathSet.insert(new Path(A, B));
                      }
                      // Continue the search from the end x+1
                  }
              }
          } // y
  
          // Find all solid left-to-right downward diagonal lines (BACK DIAGONAL)
          for (var i = -grid.height; i < grid.width; ++i) {
              for (var x = i, y = 0; y < grid.height; ++y, ++x) {
                  if (grid.isSolidBLineAt(x, y)) {
                      // Begins a line...find the end
                      var A = Vec2(x, y);
                      do { ++x; ++y; } while (grid.isSolidBLineAt(x, y));
                      var B = Vec2(x - 1, y - 1);
  
                      // Ensure that the entire line wasn't just vertices
                      if (lineContains(A, B, '\\')) {
                          for (var j = A.x; j <= B.x; ++j) {
                              grid.setUsed(j, A.y + (j - A.x)); 
                          }
  
                          var top = grid(A);
                          var up = grid(A.x, A.y - 1);
                          var uplt = grid(A.x - 1, A.y - 1);
                          if ((up === '/') || (uplt === '_') || (up === '_') || 
                              (! isVertex(top)  && 
                               (isSolidHLine(uplt) || isSolidVLine(uplt)))) {
                              // Continue half a cell more to connect for:
                              //  ___   ___
                              //  \        \    /      ----     |
                              //   \        \   \        ^      |^
                              A.x -= 0.5; A.y -= 0.5;
                          } else if (isPoint(uplt)) {
                              // Continue 1/4 cell more to connect for:
                              //
                              //  o
                              //   ^
                              //    \
                              A.x -= 0.25; A.y -= 0.25;
                          }
                          
                          var bottom = grid(B);
                          var dnrt = grid(B.x + 1, B.y + 1);
                          if ((grid(B.x, B.y + 1) === '/') || (grid(B.x + 1, B.y) === '_') || 
                              (grid(B.x - 1, B.y) === '_') || 
                              (! isVertex(grid(B)) &&
                               (isSolidHLine(dnrt) || isSolidVLine(dnrt)))) {
                              // Continue half a cell more to connect for:
                              //                       \      \ |
                              //  \       \     \       v      v|
                              //   \__   __\    /      ----     |
                              
                              B.x += 0.5; B.y += 0.5;
                          } else if (isPoint(dnrt)) {
                              // Continue 1/4 cell more to connect for:
                              //
                              //    \
                              //     v
                              //      o
                              
                              B.x += 0.25; B.y += 0.25;
                          }
                          
                          pathSet.insert(new Path(A, B));
                          // Continue the search from the end x+1,y+1
                      } // lineContains
                  }
              }
          } // i
  
  
          // Find all solid left-to-right upward diagonal lines (DIAGONAL)
          for (var i = -grid.height; i < grid.width; ++i) {
              for (var x = i, y = grid.height - 1; y >= 0; --y, ++x) {
                  if (grid.isSolidDLineAt(x, y)) {
                      // Begins a line...find the end
                      var A = Vec2(x, y);
                      do { ++x; --y; } while (grid.isSolidDLineAt(x, y));
                      var B = Vec2(x - 1, y + 1);
  
                      if (lineContains(A, B, '/')) {
                          // This is definitely a line. Commit the characters on it
                          for (var j = A.x; j <= B.x; ++j) {
                              grid.setUsed(j, A.y - (j - A.x)); 
                          }
  
                          var up = grid(B.x, B.y - 1);
                          var uprt = grid(B.x + 1, B.y - 1);
                          var bottom = grid(B);
                          if ((up === '\\') || (up === '_') || (uprt === '_') || 
                              (! isVertex(grid(B)) &&
                               (isSolidHLine(uprt) || isSolidVLine(uprt)))) {
                              
                              // Continue half a cell more to connect at:
                              //     __   __  ---     |
                              //    /      /   ^     ^|
                              //   /      /   /     / |
                              
                              B.x += 0.5; B.y -= 0.5;
                          } else if (isPoint(uprt)) {
                              
                              // Continue 1/4 cell more to connect at:
                              //
                              //       o
                              //      ^
                              //     /
                              
                              B.x += 0.25; B.y -= 0.25;
                          }
                          
                          var dnlt = grid(A.x - 1, A.y + 1);
                          var top = grid(A);
                          if ((grid(A.x, A.y + 1) === '\\') || (grid(A.x - 1, A.y) === '_') || (grid(A.x + 1, A.y) === '_') ||
                              (! isVertex(grid(A)) &&
                               (isSolidHLine(dnlt) || isSolidVLine(dnlt)))) {
  
                              // Continue half a cell more to connect at:
                              //               /     \ |
                              //    /  /      v       v|
                              // __/  /__   ----       | 
                              
                              A.x -= 0.5; A.y += 0.5;
                          } else if (isPoint(dnlt)) {
                              
                              // Continue 1/4 cell more to connect at:
                              //
                              //       /
                              //      v
                              //     o
                              
                              A.x -= 0.25; A.y += 0.25;
                          }
                          pathSet.insert(new Path(A, B));
  
                          // Continue the search from the end x+1,y-1
                      } // lineContains
                  }
              }
          } // y
          
          
          // Now look for curved corners. The syntax constraints require
          // that these can always be identified by looking at three
          // horizontally-adjacent characters.
          for (var y = 0; y < grid.height; ++y) {
              for (var x = 0; x < grid.width; ++x) {
                  var c = grid(x, y);
  
                  // Note that because of undirected vertices, the
                  // following cases are not exclusive
                  if (isTopVertex(c)) {
                      // -.
                      //   |
                      if (isSolidHLine(grid(x - 1, y)) && isSolidVLine(grid(x + 1, y + 1))) {
                          grid.setUsed(x - 1, y); grid.setUsed(x, y); grid.setUsed(x + 1, y + 1);
                          pathSet.insert(new Path(Vec2(x - 1, y), Vec2(x + 1, y + 1), 
                                                  Vec2(x + 1.1, y), Vec2(x + 1, y + 1)));
                      }
  
                      //  .-
                      // |
                      if (isSolidHLine(grid(x + 1, y)) && isSolidVLine(grid(x - 1, y + 1))) {
                          grid.setUsed(x - 1, y + 1); grid.setUsed(x, y); grid.setUsed(x + 1, y);
                          pathSet.insert(new Path(Vec2(x + 1, y), Vec2(x - 1, y + 1), 
                                                  Vec2(x - 1.1, y), Vec2(x - 1, y + 1)));
                      }
                  }
                  
                  // Special case patterns:
                  //   .  .   .  .    
                  //  (  o     )  o
                  //   '  .   '  '
                  if (((c === ')') || isPoint(c)) && (grid(x - 1, y - 1) === '.') && (grid(x - 1, y + 1) === "\'")) {
                      grid.setUsed(x, y); grid.setUsed(x - 1, y - 1); grid.setUsed(x - 1, y + 1);
                      pathSet.insert(new Path(Vec2(x - 2, y - 1), Vec2(x - 2, y + 1), 
                                              Vec2(x + 0.6, y - 1), Vec2(x + 0.6, y + 1)));
                  }
  
                  if (((c === '(') || isPoint(c)) && (grid(x + 1, y - 1) === '.') && (grid(x + 1, y + 1) === "\'")) {
                      grid.setUsed(x, y); grid.setUsed(x + 1, y - 1); grid.setUsed(x + 1, y + 1);
                      pathSet.insert(new Path(Vec2(x + 2, y - 1), Vec2(x + 2, y + 1), 
                                              Vec2(x - 0.6, y - 1), Vec2(x - 0.6, y + 1)));
                  }
  
                  if (isBottomVertex(c)) {
                      //   |
                      // -' 
                      if (isSolidHLine(grid(x - 1, y)) && isSolidVLine(grid(x + 1, y - 1))) {
                          grid.setUsed(x - 1, y); grid.setUsed(x, y); grid.setUsed(x + 1, y - 1);
                          pathSet.insert(new Path(Vec2(x - 1, y), Vec2(x + 1, y - 1), 
                                                  Vec2(x + 1.1, y), Vec2(x + 1, y - 1)));
                      }
  
                      // | 
                      //  '-
                      if (isSolidHLine(grid(x + 1, y)) && isSolidVLine(grid(x - 1, y - 1))) {
                          grid.setUsed(x - 1, y - 1); grid.setUsed(x, y); grid.setUsed(x + 1, y);
                          pathSet.insert(new Path(Vec2(x + 1, y), Vec2(x - 1, y - 1),
                                                  Vec2(x - 1.1, y), Vec2(x - 1, y - 1)));
                      }
                  }
                 
              } // for x
          } // for y
  
          // Find low horizontal lines marked with underscores. These
          // are so simple compared to the other cases that we process
          // them directly here without a helper function. Process these
          // from top to bottom and left to right so that we can read
          // them in a single sweep.
          // 
          // Exclude the special case of double underscores going right
          // into an ASCII character, which could be a source code
          // identifier such as __FILE__ embedded in the diagram.
          for (var y = 0; y < grid.height; ++y) {
              for (var x = 0; x < grid.width - 2; ++x) {
                  var lt = grid(x - 1, y);
  
                  if ((grid(x, y) === '_') && (grid(x + 1, y) === '_') && 
                      (! isASCIILetter(grid(x + 2, y)) || (lt === '_')) && 
                      (! isASCIILetter(lt) || (grid(x + 2, y) === '_'))) {
  
                      var ltlt = grid(x - 2, y);
                      var A = Vec2(x - 0.5, y + 0.5);
  
                      if ((lt === '|') || (grid(x - 1, y + 1) === '|') ||
                          (lt === '.') || (grid(x - 1, y + 1) === "'")) {
                          // Extend to meet adjacent vertical
                          A.x -= 0.5;
  
                          // Very special case of overrunning into the side of a curve,
                          // needed for logic gate diagrams
                          if ((lt === '.') && 
                              ((ltlt === '-') ||
                               (ltlt === '.')) &&
                              (grid(x - 2, y + 1) === '(')) {
                              A.x -= 0.5;
                          }
                      } else if (lt === '/') {
                          A.x -= 1.0;
                      }
  
                      // Detect overrun of a tight double curve
                      if ((lt === '(') && (ltlt === '(') &&
                          (grid(x, y + 1) === "'") && (grid(x, y - 1) === '.')) {
                          A.x += 0.5;
                      }
                      lt = ltlt = undefined;
  
                      do { grid.setUsed(x, y); ++x; } while (grid(x, y) === '_');
  
                      var B = Vec2(x - 0.5, y + 0.5);
                      var c = grid(x, y);
                      var rt = grid(x + 1, y);
                      var dn = grid(x, y + 1);
  
                      if ((c === '|') || (dn === '|') || (c === '.') || (dn === "'")) {
                          // Extend to meet adjacent vertical
                          B.x += 0.5;
  
                          // Very special case of overrunning into the side of a curve,
                          // needed for logic gate diagrams
                          if ((c === '.') && 
                              ((rt === '-') || (rt === '.')) &&
                              (grid(x + 1, y + 1) === ')')) {
                              B.x += 0.5;
                          }
                      } else if ((c === '\\')) {
                          B.x += 1.0;
                      }
  
                      // Detect overrun of a tight double curve
                      if ((c === ')') && (rt === ')') && (grid(x - 1, y + 1) === "'") && (grid(x - 1, y - 1) === '.')) {
                          B.x += -0.5;
                      }
  
                      pathSet.insert(new Path(A, B));
                  }
              } // for x
          } // for y
      } // findPaths
  
  
      function findDecorations(grid, pathSet, decorationSet) {
          function isEmptyOrVertex(c) { return (c === ' ') || /[^a-zA-Z0-9]|[ov]/.test(c); }
                      
          /** Is the point in the center of these values on a line? Allow points that are vertically
              adjacent but not horizontally--they wouldn't fit anyway, and might be text. */
          function onLine(up, dn, lt, rt) {
              return ((isEmptyOrVertex(dn) || isPoint(dn)) &&
                      (isEmptyOrVertex(up) || isPoint(up)) &&
                      isEmptyOrVertex(rt) &&
                      isEmptyOrVertex(lt));
          }
  
          for (var x = 0; x < grid.width; ++x) {
              for (var j = 0; j < grid.height; ++j) {
                  var c = grid(x, j);
                  var y = j;
  
                  if (isJump(c)) {
  
                      // Ensure that this is really a jump and not a stray character
                      if (pathSet.downEndsAt(x, y - 0.5) &&
                          pathSet.upEndsAt(x, y + 0.5)) {
                          decorationSet.insert(x, y, c);
                          grid.setUsed(x, y);
                      }
  
                  } else if (isPoint(c)) {
                      var up = grid(x, y - 1);
                      var dn = grid(x, y + 1);
                      var lt = grid(x - 1, y);
                      var rt = grid(x + 1, y);
  
                      if (pathSet.rightEndsAt(x - 1, y) ||   // Must be at the end of a line...
                          pathSet.leftEndsAt(x + 1, y) ||    // or completely isolated NSEW
                          pathSet.downEndsAt(x, y - 1) ||
                          pathSet.upEndsAt(x, y + 1) ||
  
                          pathSet.upEndsAt(x, y) ||    // For points on vertical lines 
                          pathSet.downEndsAt(x, y) ||  // that are surrounded by other characters
  
                          onLine(up, dn, lt, rt)) {
                          
                          decorationSet.insert(x, y, c);
                          grid.setUsed(x, y);
                      }
                  } else if (isGray(c)) {
                      decorationSet.insert(x, y, c);
                      grid.setUsed(x, y);
                  } else if (isTri(c)) {
                      decorationSet.insert(x, y, c);
                      grid.setUsed(x, y);
                  } else { // Arrow heads
  
                      // If we find one, ensure that it is really an
                      // arrow head and not a stray character by looking
                      // for a connecting line.
                      var dx = 0;
                      if ((c === '>') && (pathSet.rightEndsAt(x, y) || 
                                          pathSet.horizontalPassesThrough(x, y))) {
                          if (isPoint(grid(x + 1, y))) {
                              // Back up if connecting to a point so as to not
                              // overlap it
                              dx = -0.5;
                          }
                          decorationSet.insert(x + dx, y, '>', 0);
                          grid.setUsed(x, y);
                      } else if ((c === '<') && (pathSet.leftEndsAt(x, y) ||
                                                 pathSet.horizontalPassesThrough(x, y))) {
                          if (isPoint(grid(x - 1, y))) {
                              // Back up if connecting to a point so as to not
                              // overlap it
                              dx = 0.5;
                          }
                          decorationSet.insert(x + dx, y, '>', 180); 
                          grid.setUsed(x, y);
                      } else if (c === '^') {
                          // Because of the aspect ratio, we need to look
                          // in two slots for the end of the previous line
                          if (pathSet.upEndsAt(x, y - 0.5)) {
                              decorationSet.insert(x, y - 0.5, '>', 270); 
                              grid.setUsed(x, y);
                          } else if (pathSet.upEndsAt(x, y)) {
                              decorationSet.insert(x, y, '>', 270);
                              grid.setUsed(x, y);
                          } else if (pathSet.diagonalUpEndsAt(x + 0.5, y - 0.5)) {
                              decorationSet.insert(x + 0.5, y - 0.5, '>', 270 + DIAGONAL_ANGLE);
                              grid.setUsed(x, y);
                          } else if (pathSet.diagonalUpEndsAt(x + 0.25, y - 0.25)) {
                              decorationSet.insert(x + 0.25, y - 0.25, '>', 270 + DIAGONAL_ANGLE);
                              grid.setUsed(x, y);
                          } else if (pathSet.diagonalUpEndsAt(x, y)) {
                              decorationSet.insert(x, y, '>', 270 + DIAGONAL_ANGLE);
                              grid.setUsed(x, y);
                          } else if (pathSet.backDiagonalUpEndsAt(x, y)) {
                              decorationSet.insert(x, y, c, 270 - DIAGONAL_ANGLE);
                              grid.setUsed(x, y);
                          } else if (pathSet.backDiagonalUpEndsAt(x - 0.5, y - 0.5)) {
                              decorationSet.insert(x - 0.5, y - 0.5, c, 270 - DIAGONAL_ANGLE);
                              grid.setUsed(x, y);
                          } else if (pathSet.backDiagonalUpEndsAt(x - 0.25, y - 0.25)) {
                              decorationSet.insert(x - 0.25, y - 0.25, c, 270 - DIAGONAL_ANGLE);
                              grid.setUsed(x, y);
                          } else if (pathSet.verticalPassesThrough(x, y)) {
                              // Only try this if all others failed
                              decorationSet.insert(x, y - 0.5, '>', 270); 
                              grid.setUsed(x, y);
                          }
                      } else if (c === 'v') {
                          if (pathSet.downEndsAt(x, y + 0.5)) {
                              decorationSet.insert(x, y + 0.5, '>', 90); 
                              grid.setUsed(x, y);
                          } else if (pathSet.downEndsAt(x, y)) {
                              decorationSet.insert(x, y, '>', 90);
                              grid.setUsed(x, y);
                          } else if (pathSet.diagonalDownEndsAt(x, y)) {
                              decorationSet.insert(x, y, '>', 90 + DIAGONAL_ANGLE);
                              grid.setUsed(x, y);
                          } else if (pathSet.diagonalDownEndsAt(x - 0.5, y + 0.5)) {
                              decorationSet.insert(x - 0.5, y + 0.5, '>', 90 + DIAGONAL_ANGLE);
                              grid.setUsed(x, y);
                          } else if (pathSet.diagonalDownEndsAt(x - 0.25, y + 0.25)) {
                              decorationSet.insert(x - 0.25, y + 0.25, '>', 90 + DIAGONAL_ANGLE);
                              grid.setUsed(x, y);
                          } else if (pathSet.backDiagonalDownEndsAt(x, y)) {
                              decorationSet.insert(x, y, '>', 90 - DIAGONAL_ANGLE);
                              grid.setUsed(x, y);
                          } else if (pathSet.backDiagonalDownEndsAt(x + 0.5, y + 0.5)) {
                              decorationSet.insert(x + 0.5, y + 0.5, '>', 90 - DIAGONAL_ANGLE);
                              grid.setUsed(x, y);
                          } else if (pathSet.backDiagonalDownEndsAt(x + 0.25, y + 0.25)) {
                              decorationSet.insert(x + 0.25, y + 0.25, '>', 90 - DIAGONAL_ANGLE);
                              grid.setUsed(x, y);
                          } else if (pathSet.verticalPassesThrough(x, y)) {
                              // Only try this if all others failed
                              decorationSet.insert(x, y + 0.5, '>', 90); 
                              grid.setUsed(x, y);
                          }
                      } // arrow heads
                  } // decoration type
              } // y
          } // x
      } // findArrowHeads
  
      //var grid = new Grid(diagramString);
      var grid = makeGrid(diagramString);
  
      var pathSet = new PathSet();
      var decorationSet = new DecorationSet();
  
      findPaths(grid, pathSet);
      findDecorations(grid, pathSet, decorationSet);
  
      var svg = '<svg class="diagram" xmlns="http://www.w3.org/2000/svg" version="1.1" height="' + 
          ((grid.height + 1) * SCALE * ASPECT) + '" width="' + ((grid.width + 1) * SCALE) + '"';
  
      if (alignmentHint === 'floatleft') {
          svg += ' style="float:left;margin:15px 30px 15px 0;"';
      } else if (alignmentHint === 'floatright') {
          svg += ' style="float:right;margin:15px 0 15px 30px;"';
      } else if (alignmentHint === 'center') {
          svg += ' style="margin:0 auto 0 auto;"';
      }
  
      svg += '><g transform="translate(' + Vec2(1, 1) + ')">\n';
  
      if (DEBUG_SHOW_GRID) {
          svg += '<g style="opacity:0.1">\n';
          for (var x = 0; x < grid.width; ++x) {
              for (var y = 0; y < grid.height; ++y) {
                  svg += '<rect x="' + ((x - 0.5) * SCALE + 1) + '" + y="' + ((y - 0.5) * SCALE * ASPECT + 2) + '" width="' + (SCALE - 2) + '" height="' + (SCALE * ASPECT - 2) + '" style="fill:';
                  if (grid.isUsed(x, y)) {
                      svg += 'red;';
                  } else if (grid(x, y) === ' ') {
                      svg += 'gray;opacity:0.05';
                  } else {
                      svg += 'blue;';
                  }
                  svg += '"/>\n';
              }
          }
          svg += '</g>\n';
      }
      
      svg += pathSet.toSVG();
      svg += decorationSet.toSVG();
  
      // Convert any remaining characters
      if (! DEBUG_HIDE_PASSTHROUGH) {
          svg += '<g transform="translate(0,0)">';
          for (var y = 0; y < grid.height; ++y) {
              for (var x = 0; x < grid.width; ++x) {
                  var c = grid(x, y);
                  if (/[\u2B22\u2B21]/.test(c)) {
                      // Enlarge hexagons so that they fill a grid
                      svg += '<text text-anchor="middle" x="' + (x * SCALE) + '" y="' + (4 + y * SCALE * ASPECT) + '" style="font-size:20.5px">' + escapeHTMLEntities(c) +  '</text>';
                  } else if ((c !== ' ') && ! grid.isUsed(x, y)) {
                      svg += '<text text-anchor="middle" x="' + (x * SCALE) + '" y="' + (4 + y * SCALE * ASPECT) + '">' + escapeHTMLEntities(c) +  '</text>';
                  } // if
              } // y
          } // x
          svg += '</g>';
      }
  
      if (DEBUG_SHOW_SOURCE) {
          // Offset the characters a little for easier viewing
          svg += '<g transform="translate(2,2)">\n';
          for (var x = 0; x < grid.width; ++x) {
              for (var y = 0; y < grid.height; ++y) {
                  var c = grid(x, y);
                  if (c !== ' ') {
                      svg += '<text text-anchor="middle" x="' + (x * SCALE) + '" y="' + (4 + y * SCALE * ASPECT) + '" style="fill:#F00;font-family:Menlo,monospace;font-size:12px;text-align:center">' + escapeHTMLEntities(c) +  '</text>';
                  } // if
              } // y
          } // x
          svg += '</g>';
      } // if
  
      svg += '</g></svg>';
  
      svg = svg.rp(new RegExp(HIDE_O, 'g'), 'o');
  
  
      return svg;
  }
  
  
  /* xcode.min.js modified */
  var HIGHLIGHT_STYLESHEET =
          "<style>.hljs{display:block;overflow-x:auto;padding:0.5em;background:#fff;color:#000;-webkit-text-size-adjust:none}"+
          ".hljs-comment{color:#006a00}" +
          ".hljs-keyword{color:#02E}" +
          ".hljs-literal,.nginx .hljs-title{color:#aa0d91}" + 
          ".method,.hljs-list .hljs-title,.hljs-tag .hljs-title,.setting .hljs-value,.hljs-winutils,.tex .hljs-command,.http .hljs-title,.hljs-request,.hljs-status,.hljs-name{color:#008}" + 
          ".hljs-envvar,.tex .hljs-special{color:#660}" + 
          ".hljs-string{color:#c41a16}" +
          ".hljs-tag .hljs-value,.hljs-cdata,.hljs-filter .hljs-argument,.hljs-attr_selector,.apache .hljs-cbracket,.hljs-date,.hljs-regexp{color:#080}" + 
          ".hljs-sub .hljs-identifier,.hljs-pi,.hljs-tag,.hljs-tag .hljs-keyword,.hljs-decorator,.ini .hljs-title,.hljs-shebang,.hljs-prompt,.hljs-hexcolor,.hljs-rule .hljs-value,.hljs-symbol,.hljs-symbol .hljs-string,.hljs-number,.css .hljs-function,.hljs-function .hljs-title,.coffeescript .hljs-attribute{color:#A0C}" +
          ".hljs-function .hljs-title{font-weight:bold;color:#000}" + 
          ".hljs-class .hljs-title,.smalltalk .hljs-class,.hljs-type,.hljs-typename,.hljs-tag .hljs-attribute,.hljs-doctype,.hljs-class .hljs-id,.hljs-built_in,.setting,.hljs-params,.clojure .hljs-attribute{color:#5c2699}" +
          ".hljs-variable{color:#3f6e74}" +
          ".css .hljs-tag,.hljs-rule .hljs-property,.hljs-pseudo,.hljs-subst{color:#000}" + 
          ".css .hljs-class,.css .hljs-id{color:#9b703f}" +
          ".hljs-value .hljs-important{color:#ff7700;font-weight:bold}" +
          ".hljs-rule .hljs-keyword{color:#c5af75}" +
          ".hljs-annotation,.apache .hljs-sqbracket,.nginx .hljs-built_in{color:#9b859d}" +
          ".hljs-preprocessor,.hljs-preprocessor *,.hljs-pragma{color:#643820}" +
          ".tex .hljs-formula{background-color:#eee;font-style:italic}" +
          ".diff .hljs-header,.hljs-chunk{color:#808080;font-weight:bold}" +
          ".diff .hljs-change{background-color:#bccff9}" +
          ".hljs-addition{background-color:#baeeba}" +
          ".hljs-deletion{background-color:#ffc8bd}" +
          ".hljs-comment .hljs-doctag{font-weight:bold}" +
          ".method .hljs-id{color:#000}</style>";
  
  function isMarkdeepScriptName(str) { return str.search(/markdeep\S*?\.js$/i) !== -1; }
  function toArray(list) { return Array.prototype.slice.call(list); }
  
  // Intentionally uninitialized global variable used to detect
  // recursive invocations
  if (! window.alreadyProcessedMarkdeep) {
      window.alreadyProcessedMarkdeep = true;
  
      // Detect the noformat argument to the URL
      var noformat = (window.location.href.search(/\?.*noformat.*/i) !== -1);
  
      // Export relevant methods
      window.markdeep = Object.freeze({ 
          format:               markdeepToHTML,
          formatDiagram:        diagramToSVG,
          stylesheet:           function() {
              return STYLESHEET + sectionNumberingStylesheet() + HIGHLIGHT_STYLESHEET;
          }
      });
  
      var mode = option('mode');
      switch (mode) {
      case 'script':
          // Nothing to do
          return;
  
      case 'html':
      case 'doxygen':
          toArray(document.getElementsByClassName('diagram')).concat(toArray(document.getElementsByTagName('diagram'))).forEach(
              function (element) {
                  var src = unescapeHTMLEntities(element.innerHTML);
                  // Remove the first and last string (which probably
                  // had the pre or diagram tag as part of them) if they are 
                  // empty except for whitespace.
                  src = src.rp(/(:?^[ \t]*\n)|(:?\n[ \t]*)$/g, '');
  
                  if (mode === 'doxygen') {
                      // Undo Doxygen's &ndash and &mdash, which are impossible to 
                      // detect once the browser has parsed the document
                      src = src.rp(new RegExp('\u2013', 'g'), '--');
                      src = src.rp(new RegExp('\u2014', 'g'), '---');
                      
                      // Undo Doxygen's links within the diagram because they throw off spacing
                      src = src.rp(/<a class="el" .*>(.*)<\/a>/g, '$1');
                  }
                  element.outerHTML = '<center class="md">' + diagramToSVG(removeLeadingSpace(src), '') + '</center>';
              });
          
          toArray(document.getElementsByClassName('markdeep')).concat(toArray(document.getElementsByTagName('markdeep'))).forEach(
              function (src) {
                  var dst = document.createElement('div');
                  dst.innerHTML = markdeepToHTML(removeLeadingSpace(unescapeHTMLEntities(src.innerHTML)), true);
                  src.parentNode.replaceChild(dst, src);
              });
  
          // Include our stylesheet even if there are no tags, but not the BODY_STYLESHEET
          document.head.innerHTML = window.markdeep.stylesheet() + document.head.innerHTML;
          return;
      }
      
      // The following is Morgan's massive hack for allowing browsers to
      // directly parse Markdown from what appears to be a text file, but is
      // actually an intentionally malformed HTML file.
      
      // In order to be able to show what source files look like, the
      // noformat argument may be supplied.
       
      
      if (! noformat) {
          // Remove any recursive references to this script so that we
          // don't trigger the cost of recursive *loading*. (The
          // alreadyProcessedMarkdeep variable will prevent recursive
          // *execution*.) We allow other scripts to pass through.
          toArray(document.getElementsByTagName('script')).forEach(function(node) {
              if (isMarkdeepScriptName(node.src)) {
                  node.parentNode.removeChild(node);
              }
          });
          
          // Hide the body while formatting
          document.body.style.visibility = 'hidden';
      }
        
      var source = nodeToMarkdeepSource(document.body);
  
      if (noformat) { 
          // Abort processing
          source = source.rp(/<!-- Markdeep:.+$/gm, '') + MARKDEEP_LINE;
      
          // Escape the <> (not ampersand) that we just added
          source = source.rp(/</g, '&lt;').rp(/>/g, '&gt;');
              
          // Replace the Markdeep line itself so that ?noformat examples have a valid line to copy
          document.body.innerHTML = entag('pre', source);
          return;
      }
  
      source = unescapeHTMLEntities(source);
      
      // Run markdeep processing after the rest of this file parses
      setTimeout(function() {
          var markdeepHTML = markdeepToHTML(source, false);
          
          // Need MathJax if $$ ... $$, \( ... \), or \begin{
          var needMathJax = option('detectMath') &&
              ((markdeepHTML.search(/(?:\$\$[\s\S]+\$\$)|(?:\\begin{)/m) !== -1) || 
               (markdeepHTML.search(/\\\(.*\\\)/) !== -1));
          
          if (needMathJax) {
              // Custom definitions (NC == \newcommand)
              var MATHJAX_COMMANDS = '$$NC{\\n}{\\hat{n}}NC{\\w}{\\hat{\\omega}}NC{\\wi}{\\w_\\mathrm{i}}NC{\\wo}{\\w_\\mathrm{o}}NC{\\wh}{\\w_\\mathrm{h}}NC{\\Li}{L_\\mathrm{i}}NC{\\Lo}{L_\\mathrm{o}}NC{\\Le}{L_\\mathrm{e}}NC{\\Lr}{L_\\mathrm{r}}NC{\\Lt}{L_\\mathrm{t}}NC{\\O}{\\mathrm{O}}NC{\\degrees}{{^\\circ}}NC{\\T}{\\mathsf{T}}NC{\\mathset}[1]{\\mathbb{#1}}NC{\\Real}{\\mathset{R}}NC{\\Integer}{\\mathset{Z}}NC{\\Boolean}{\\mathset{B}}NC{\\Complex}{\\mathset{C}}$$\n'.rp(/NC/g, '\\newcommand');
  
              markdeepHTML = '<script type="text/x-mathjax-config">MathJax.Hub.Config({ TeX: { equationNumbers: {autoNumber: "AMS"} } });</script>' + 
                  '<span style="display:none">' + MATHJAX_COMMANDS + '</span>\n' + markdeepHTML; 
          }
          
          markdeepHTML += MARKDEEP_FOOTER;
          
          // Replace the document. If using MathJax, include the custom Markdeep definitions
          var longDocument = source.length > 1000;
          var head = BODY_STYLESHEET + STYLESHEET + sectionNumberingStylesheet() + HIGHLIGHT_STYLESHEET;
          if (longDocument) {
              // Add more spacing before the title in a long document
              head += entag('style', 'div.title { padding-top: 40px; } div.afterTitles { height: 15px; }');
          }
  
          if (window.location.href.search(/\?.*export.*/i) !== -1) {
              // Export mode
              var text = '<meta charset="UTF-8"><meta http-equiv="content-type" content="text/html;charset=UTF-8">' + head + document.head.innerHTML + markdeepHTML;
              if (needMathJax) {
                  // Dynamically load mathjax
                  text += '<script src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>';
              }
              document.body.innerHTML = entag('code', escapeHTMLEntities(text));
          } else {
              document.head.innerHTML = '<meta charset="UTF-8"><meta http-equiv="content-type" content="text/html;charset=UTF-8">' + head + document.head.innerHTML;
              document.body.innerHTML = markdeepHTML;
              if (needMathJax) {
                  // Dynamically load mathjax
                  var script = document.createElement("script");
                  script.type = "text/javascript";
                  script.src  = "https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML";
                  document.getElementsByTagName("head")[0].appendChild(script);
              }
          }
  
          document.body.style.visibility = 'visible';
      }, 0);
  }
  
  })();
  
  /* The following is highlight.min.js 9.3.0 from https://highlightjs.org
      BSD3 License | git.io/hljslicense */
  
  /*! highlight.js v9.5.0 | BSD3 License | git.io/hljslicense */
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role roles rollback rolling rollup round row row_count rowdependencies rowid rownum rows rtrim rules safe salt sample save savepoint sb1 sb2 sb4 scan schema schemacheck scn scope scroll sdo_georaster sdo_topo_geometry search sec_to_time second section securefile security seed segment select self sequence sequential serializable server servererror session session_user sessions_per_user set sets settings sha sha1 sha2 share shared shared_pool short show shrink shutdown si_averagecolor si_colorhistogram si_featurelist si_positionalcolor si_stillimage si_texture siblings sid sign sin size size_t sizes skip slave sleep smalldatetimefromparts smallfile snapshot some soname sort soundex source space sparse spfile split sql sql_big_result sql_buffer_result sql_cache sql_calc_found_rows sql_small_result sql_variant_property sqlcode sqldata sqlerror sqlname sqlstate sqrt square standalone standby start starting startup statement static statistics stats_binomial_test stats_crosstab stats_ks_test 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