www/jssrc/blerg/Util.js

   1 blerg = window.blerg || {};
   2
   3 blerg.Util = {};
   4
   5 blerg.Util.blergFormat = function(text) {
   6         var lines = text.split(/\r?\n/);
   7         if (lines[lines.length - 1] == '')
   8                 lines.pop();
   9
  10         var out = ['<p>'];
  11         var endpush = null;
  12         var listMode = false;
  13         lines.forEach(function(l) {
  14                 if (l == '') {
  15                         if (out[out.length - 1] == '<br>') {
  16                                 out[out.length - 1] = '<p>';
  17                         }
  18                         if (out[out.length - 1] == '</li>') {
  19                                 out.push('</ul>');
  20                                 out.push('<p>');
  21                                 listMode = false;
  22                         }
  23                         return;
  24                 }
  25
  26                 // Put quoted material into a special paragraph
  27                 if (l[0] == '>') {
  28                         var pi = out.lastIndexOf('<p>');
  29                         if (pi != -1) {
  30                                 out[pi] = '<p class="quote">';
  31                                 l = l.replace(/^>\s*/, '');
  32                         }
  33                 }
  34
  35                 // Sanitize HTML input
  36                 l = l.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
  37
  38                 // Turn HTTP URLs into links
  39                 l = l.replace(/(\s|^)(https?:\/\/[a-zA-Z0-9.-]*[a-zA-Z0-9](\/([^\s"]*[^.!,;?()\s])?)?)/g, '$1<a href="$2">$2</a>');
  40
  41                 // Turn markdown links into links
  42                 var re;
  43
  44                 /*
  45                 // Craft a regex that finds URLs that end in the extensions specified by BlergMedia.audioExtensions.
  46                 re = new RegExp('(\\s|^)\\[([^\\]]+)\\]\\((https?:\\/\\/[a-zA-Z0-9.-]*[a-zA-Z0-9]\\/[^)"]*?\\.(' + BlergMedia.audioExtensions.join('|') + '))\\)', 'g');
  47                 l = l.replace(re, '$1<a href="$3">$2</a> <a href="$3" onclick="play_audio(); return false"><img src="/images/play.png"></a>');
  48
  49                 // Ditto, but use the extended markdown link syntax to specify the format
  50                 re = new RegExp('(\\s|^)\\[([^\\]]+)\\]\\((https?:\\/\\/[a-zA-Z0-9.-]*[a-zA-Z0-9](\\/[^)"]*?)?)\\s+audio:(' + BlergMedia.audioExtensions.join('|') + ')\\)', 'g');
  51                 l = l.replace(re, '$1<a href="$3">$2</a> <a href="$3" onclick="play_audio(); return false"><img src="/images/play.png"></a>');
  52
  53                 // Craft a regex that finds URLs that end in the extensions specified by BlergMedia.videoExtensions.
  54                 re = new RegExp('(\\s|^)\\[([^\\]]+)\\]\\((https?:\\/\\/[a-zA-Z0-9.-]*[a-zA-Z0-9]\\/[^)"]*?\\.(' + BlergMedia.videoExtensions.join('|') + '))\\)', 'g');
  55                 l = l.replace(re, '$1<a href="$3">$2</a> <a href="$3" onclick="play_video(); return false"><img src="/images/play.png"></a>');
  56
  57                 // Ditto, but use the extended markdown link syntax to specify the format
  58                 re = new RegExp('(\\s|^)\\[([^\\]]+)\\]\\((https?:\\/\\/[a-zA-Z0-9.-]*[a-zA-Z0-9](\\/[^)"]*?)?)\\s+video:(' + BlergMedia.videoExtensions.join('|') + ')\\)', 'g');
  59                 l = l.replace(re, '$1<a href="$3">$2</a> <a href="$3" onclick="play_video(); return false"><img src="/images/play.png"></a>');
  60                 */
  61
  62                 // Regular markdown links
  63                 l = l.replace(/(\s|^)\[([^\]]+)\]\((https?:\/\/[a-zA-Z0-9.-]*[a-zA-Z0-9](\/[^)"]*?)?)\)/g, '$1<a href="$3">$2</a>');
  64
  65                 // Turn *foo* into italics and **foo** into bold
  66                 l = l.replace(/([^\w\\]|^)\*\*(\w[^*]*)\*\*(\W|$)/g, '$1<b>$2</b>$3');
  67                 l = l.replace(/([^\w\\]|^)\*(\w[^*]*)\*(\W|$)/g, '$1<i>$2</i>$3');
  68
  69                 // Turn refs and tags into links
  70                 l = l.replace(/(\s|^)#([A-Za-z0-9_-]+)/g, '$1<a href="#/tag/$2" class="ref" onclick="return qlink()">#$2</a>');
  71                 l = l.replace(/(\s|^)@([A-Za-z0-9_-]+)(\/\d+)?/g, '$1<a href="#$2$3" class="ref" onclick="return qlink()">@$2</a>');
  72
  73                 // Create lists when lines begin with *
  74                 if (l[0] == '*') {
  75                         if (!listMode) {
  76                                 var pi = out.lastIndexOf('<p>');
  77                                 out[pi] = '<ul>';
  78                                 listMode = true;
  79                         }
  80                         l = l.replace(/^\*\s*/, '');
  81                         out.push('<li>');
  82                         endpush = '</li>';
  83                 }
  84
  85                 // Create headers when lines begin with = or #
  86                 if (l[0] == '=' || l[0] == '#') {
  87                         var m = l.match(/^([=#]+)/);
  88                         var depth = m[1].length;
  89                         if (depth <= 5) {
  90                                 l = l.replace(/^[=#]+\s*/, '').replace(/\s*[=#]+$/, '');
  91                                 out.push('<h' + depth + '>');
  92                                 endpush = '</h' + depth + '>';
  93                         }
  94                 }
  95
  96                 // Remove backslashes from escaped metachars
  97                 l = l.replace(/\\([*\[\]@#])/g, '$1');
  98
  99                 out.push(l);
 100                 if (endpush) {
 101                         out.push(endpush);
 102                         endpush = null;
 103                 } else {
 104                         out.push('<br>');
 105                 }
 106         });
 107         while (out[out.length - 1] == '<br>' || out[out.length - 1] == '<p>')
 108                 out.pop();
 109         if (listMode)
 110                 out.push('</ul>');
 111
 112         return out.join('');
 113 }