Fix Disqus craptacular markup.

fix-disqus-markup.js

// Ben Alman
// http://benalman.com/
// 
// Requires jQuery 1.3.2+ and jQuery doTimeout
// http://jquery.com/
// http://benalman.com/projects/jquery-dotimeout-plugin/
// 
// SyntaxHighlighter optional (but totally awesome)
// http://alexgorbatchev.com/wiki/SyntaxHighlighter
// 
// jQuery BBQ optional (IMO, don't leave home without it)
// http://benalman.com/projects/jquery-bbq-plugin/

$(function(){
  
  // Fix Disqus craptacular markup.
  $('#disqus_thread').doTimeout( 250, function(){
    var that = $(this),
      html = that.html(),
      frag = $.param.fragment(), // You don't *need* jQuery BBQ for this.
      comment_elem,
      content,
      data;
    
    // Get element data store.
    data = that.data( 'disqus', data = that.data( 'disqus' ) || {} );
    
    if ( html !== data.html ) {
      
      // The first time (only) there is any actual Disqus HTML...
      if ( html !== '' && !data.has_html ) {
        data.has_html = true;
        
        // If location.hash has a Disqus #comment-12345678 reference...
        if ( /^comment-\d+$/.test( frag ) ) {
          
          // Scroll to that element, if it exists.
          comment_elem = that.find( '#' + frag );
          if ( comment_elem.length ) {
            $('body').scrollTop( comment_elem.offset().top );
          }
        }
      }
      
      content = that.find( '.dsq-comment-message' );
      
      // Unwrap any <P> text followed by a <BR>.
      content.find('p + br').each(function() {
        var p = $(this).prev();
        p.replaceWith( p.html() );
      });
      
      // Unwrap last-child <P> text.
      content.find('p:last-child').each(function() {
        var p = $(this);
        p.replaceWith( p.html() );
      });
      
      // Find all <PRE>
      content.find('pre')
        // Convert <BR> to \n
        .each(function() {
          var pre = $(this);
          pre.html( pre.html().replace( /<br>/gi, "\n" ) );
        })
        // Remove any <BR> immediately following <PRE>
        .next( 'br' )
          .remove();
      
      // Syntax highlighter.
      SyntaxHighlighter.highlight();
      
      data.html = html;
    }
    
    // Poll.
    return true;
  });
  
});