text: /**
   * Tag-closer extension for CodeMirror.
   *
   * This extension adds a "closeTag" utility function that can be used with key bindings to 
   * insert a matching end tag after the ">" character of a start tag has been typed.  It can
   * also complete "</" if a matching start tag is found.  It will correctly ignore signal
   * characters for empty tags, comments, CDATA, etc.
   *
   * The function depends on internal parser state to identify tags.  It is compatible with the
   * following CodeMirror modes and will ignore all others:
   * - htmlmixed
   * - xml
   *
   * See demos/closetag.html for a usage example.
   * 
   * @author Nathan Williams <nathan@nlwillia.net>
   * Contributed under the same license terms as CodeMirror.
   */
  (function() {
  	/** Option that allows tag closing behavior to be toggled.  Default is true. */
  	CodeMirror.defaults['closeTagEnabled'] = true;
  	
  	/** Array of tag names to add indentation after the start tag for.  Default is the list of block-level html tags. */
  	CodeMirror.defaults['closeTagIndent'] = ['applet', 'blockquote', 'body', 'button', 'div', 'dl', 'fieldset', 'form', 'frameset', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'html', 'iframe', 'layer', 'legend', 'object', 'ol', 'p', 'select', 'table', 'ul'];
  
  	/** Array of tag names where an end tag is forbidden. */
  	CodeMirror.defaults['closeTagVoid'] = ['area', 'base', 'br', 'col', 'command', 'embed', 'hr', 'img', 'input', 'keygen', 'link', 'meta', 'param', 'source', 'track', 'wbr'];
  
  	function innerXMLState(cm, state) {
  	    var inner = CodeMirror.innerMode(cm.getMode(), state);
  	    if (inner.mode.name == "xml") return inner.state;
  	}
  
  
  	/**
  	 * Call during key processing to close tags.  Handles the key event if the tag is closed, otherwise throws CodeMirror.Pass.
  	 * - cm: The editor instance.
  	 * - ch: The character being processed.
  	 * - indent: Optional.  An array of tag names to indent when closing.  Omit or pass true to use the default indentation tag list defined in the 'closeTagIndent' option.
  	 *   Pass false to disable indentation.  Pass an array to override the default list of tag names.
  	 * - vd: Optional.  An array of tag names that should not be closed.  Omit to use the default void (end tag forbidden) tag list defined in the 'closeTagVoid' option.  Ignored in xml mode.
  	 */
  	CodeMirror.defineExtension("closeTag", function(cm, ch, indent, vd) {
  		if (!cm.getOption('closeTagEnabled')) {
  			throw CodeMirror.Pass;
  		}
  		
  		/*
  		 * Relevant structure of token:
  		 *
  		 * htmlmixed
  		 * 		className
  		 * 		state
  		 * 			htmlState
  		 * 				type
  		 *				tagName
  		 * 				context
  		 * 					tagName
  		 * 			mode
  		 * 
  		 * xml
  		 * 		className
  		 * 		state
  		 * 			tagName
  		 * 			type
  		 */
  		
  		var pos = cm.getCursor();
  		var tok = cm.getTokenAt(pos);
  		var state = innerXMLState(cm, tok.state);
  
  		if (state) {
  			
  			if (ch == '>') {
  				var type = state.type;
  				
  				if (tok.className == 'tag' && type == 'closeTag') {
  					throw CodeMirror.Pass; // Don't process the '>' at the end of an end-tag.
  				}
  			
  				cm.replaceSelection('>'); // Mode state won't update until we finish the tag.
  				pos = {line: pos.line, ch: pos.ch + 1};
  				cm.setCursor(pos);
  		
  				tok = cm.getTokenAt(cm.getCursor());
  				state = innerXMLState(cm, tok.state);
  				if (!state) throw CodeMirror.Pass;
  				var type = state.type;
  
  				if (tok.className == 'tag' && type != 'selfcloseTag') {
  					var tagName = state.tagName;
  					if (tagName.length > 0 && shouldClose(cm, vd, tagName)) {
  						insertEndTag(cm, indent, pos, tagName);
  					}
  					return;
  				}
  				
  				// Undo the '>' insert and allow cm to handle the key instead.
  				cm.setSelection({line: pos.line, ch: pos.ch - 1}, pos);
  				cm.replaceSelection("");
  			
  			} else if (ch == '/') {
  				if (tok.className == 'tag' && tok.string == '<') {
  					var ctx = state.context, tagName = ctx ? ctx.tagName : '';
  					if (tagName.length > 0) {
  						completeEndTag(cm, pos, tagName);
  						return;
  					}
  				}
  			}
  		
  		}
  		
  		throw CodeMirror.Pass; // Bubble if not handled
  	});
  
  	function insertEndTag(cm, indent, pos, tagName) {
  		if (shouldIndent(cm, indent, tagName)) {
  			cm.replaceSelection('\n\n</' + tagName + '>', 'end');
  			cm.indentLine(pos.line + 1);
  			cm.indentLine(pos.line + 2);
  			cm.setCursor({line: pos.line + 1, ch: cm.getLine(pos.line + 1).length});
  		} else {
  			cm.replaceSelection('</' + tagName + '>');
  			cm.setCursor(pos);
  		}
  	}
  	
  	function shouldIndent(cm, indent, tagName) {
  		if (typeof indent == 'undefined' || indent == null || indent == true) {
  			indent = cm.getOption('closeTagIndent');
  		}
  		if (!indent) {
  			indent = [];
  		}
  		return indexOf(indent, tagName.toLowerCase()) != -1;
  	}
  	
  	function shouldClose(cm, vd, tagName) {
  		if (cm.getOption('mode') == 'xml') {
  			return true; // always close xml tags
  		}
  		if (typeof vd == 'undefined' || vd == null) {
  			vd = cm.getOption('closeTagVoid');
  		}
  		if (!vd) {
  			vd = [];
  		}
  		return indexOf(vd, tagName.toLowerCase()) == -1;
  	}
  	
  	// C&P from codemirror.js...would be nice if this were visible to utilities.
  	function indexOf(collection, elt) {
  		if (collection.indexOf) return collection.indexOf(elt);
  		for (var i = 0, e = collection.length; i < e; ++i)
  			if (collection[i] == elt) return i;
  		return -1;
  	}
  
  	function completeEndTag(cm, pos, tagName) {
  		cm.replaceSelection('/' + tagName + '>');
  		cm.setCursor({line: pos.line, ch: pos.ch + tagName.length + 2 });
  	}
  	
  })();
  