/*! Xquared is copyrighted free software by Alan Kang <jania902@gmail.com>.
 *  For more information, see http://xquared.springbook.playmaru.net/
 */
if(!window.xq) {
	/**
	 * @namespace Contains all variables.
	 */
	var xq = {};
}

xq.majorVersion = '0.7';
xq.minorVersion = '20080402';



/**
 * Compiles regular expression pattern if possible.
 *
 * @param {String} p Regular expression.
 * @param {String} f Flags.
 */
xq.compilePattern = function(p, f) {
	if(!RegExp.prototype.compile) return new RegExp(p, f);
	
	var r = new RegExp();
	r.compile(p, f);
	return r;
}



/**
 * @class Simple class based OOP framework
 */
xq.Class = function() {
	var parent = null, properties = xq.$A(arguments), key;
	if (typeof properties[0] === "function") {
		parent = properties.shift();
	}
	
	function klass() {
		this.initialize.apply(this, arguments);
	}
	
	if(parent) {
		for (key in parent.prototype) {
			klass.prototype[key] = parent.prototype[key];
		}
	}
	
	for (key in properties[0]) if(properties[0].hasOwnProperty(key)){
		klass.prototype[key] = properties[0][key];
	}
	
	if (!klass.prototype.initialize) {
		klass.prototype.initialize = function() {};
	}
	
	klass.prototype.constructor = klass;
	
	return klass;
};

/**
 * Registers event handler
 *
 * @param {Element} element Target element.
 * @param {String} eventName Name of event. For example "keydown".
 * @param {Function} handler Event handler.
 */
xq.observe = function(element, eventName, handler) {
	if (element.addEventListener) {
		element.addEventListener(eventName, handler, false);
	} else {
		element.attachEvent('on' + eventName, handler);
	}
	element = null;
};

/**
 * Unregisters event handler
 */
xq.stopObserving = function(element, eventName, handler) {
	if (element.removeEventListener) {
		element.removeEventListener(eventName, handler, false);
	} else {
		element.detachEvent("on" + eventName, handler);
	}
	element = null;
};

/**
 * Predefined event handler which simply cancels given event
 *
 * @param {Event} e Event to cancel.
 */
xq.cancelHandler = function(e) {xq.stopEvent(e); return false;};

/**
 * Stops event propagation.
 *
 * @param {Event} e Event to stop.
 */
xq.stopEvent = function(e) {
      if(e.preventDefault) {
    	  e.preventDefault();
      }
      if(e.stopPropagation) {
    	  e.stopPropagation();
      }
      e.returnValue = false;
      e.cancelBubble = true;
      e.stopped = true;
};

xq.isButton = function(event, code) {
     return event.which ? (event.which === code + 1) : (event.button === code);
};
xq.isLeftClick = function(event) {return xq.isButton(event, 0);};
xq.isMiddleClick = function(event) {return xq.isButton(event, 1);};
xq.isRightClick = function(event) {return xq.isButton(event, 2);};

xq.getEventPoint = function(event) {
	return {
		x: event.pageX || (event.clientX + (document.documentElement.scrollLeft || document.body.scrollLeft)),
		y: event.pageY || (event.clientY + (document.documentElement.scrollTop || document.body.scrollTop))
	};
};

xq.getCumulativeOffset = function(element, until) {
	var top = 0, left = 0;
	
	do {
		top += element.offsetTop  || 0;
		left += element.offsetLeft || 0;
		element = element.offsetParent;
	} while (element && element != until);
	
	return {top:top, left:left};
};

xq.$ = function(id) {
	return document.getElementById(id);
};

xq.isEmptyHash = function(h) {
	for(var key in h) if(h.hasOwnProperty(key)){
		return false;
	}
	return true;
};

xq.emptyFunction = function() {};

xq.$A = function(arraylike) {
	var len = arraylike.length, a = [];
	while (len--) {
		a[len] = arraylike[len];
	}
	return a;
};

xq.addClassName = function(element, className) {
	if (!xq.hasClassName(element, className)) {
		element.className += (element.className ? ' ' : '') + className;
	}
    return element;
};
xq.removeClassName = function(element, className) {
	if (xq.hasClassName(element, className)) {
		element.className = element.className.replace(new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
	}
    return element;
};
xq.hasClassName = function(element, className) {
	var classNames = element.className;
	return (classNames.length > 0 && (classNames === className || new RegExp("(^|\\s)" + className + "(\\s|$)").test(classNames)));
};

xq.serializeForm = function(f) {
	var options = {hash: true};
	var data = {};
	var elements = f.getElementsByTagName("*");
	for(var i = 0; i < elements.length; i++) {
		var element = elements[i];
		var tagName = element.tagName.toLowerCase();
		if(element.disabled || !element.name || ['input', 'textarea', 'option', 'select'].indexOf(tagName) === -1) {
			continue;
		}
		
		var key = element.name;
		var value = xq.getValueOfElement(element);
		
		if(value === undefined) {
			continue;
		}
		
		if(key in data) {
			if(data[key].constructor === Array) {
				data[key] = [data[key]];
			}
			data[key].push(value);
		} else {
			data[key] = value;
		}
	}
	return data;
};

xq.getValueOfElement = function(e) {
	var type = e.type.toLowerCase();
	if(type === 'checkbox' || type === 'radio') {
		return e.checked ? e.value : undefined;
	} else {
		return e.value;
	}
};

/**
 * Find elements by class name (and tag name)
 * 
 * @param {Element} element Root element
 * @param {String} className Target class name
 * @param {String} tagName Optional tag name
 */
xq.getElementsByClassName = function(element, className, tagName) {
	if(!tagName && element.getElementsByClassName) {
		return element.getElementsByClassName(className);
	}
	
	var elements = element.getElementsByTagName(tagName || "*");
	var len = elements.length;
	var result = [];
	var p = xq.compilePattern("(^|\\s)" + className + "($|\\s)", "i");
	for(var i = 0; i < len; i++) {
		var cur = elements[i];
		if(p.test(cur.className)) {
			result.push(cur);
		}
	}
	return result;
};

if(!window.Prototype) {
	if(!Function.prototype.bind) {
		Function.prototype.bind = function() {
			var m = this, arg = xq.$A(arguments), o = arg.shift();
			return function() {
				return m.apply(o, arg.concat(xq.$A(arguments)));
			};
		};
	}
	
	if(!Function.prototype.bindAsEventListener) {
		Function.prototype.bindAsEventListener = function() {
			var m = this, arg = xq.$A(arguments), o = arg.shift();
			return function(event) {
				return m.apply(o, [event || window.event].concat(arg));
			};
		};
	}
	
	Array.prototype.find = function(f) {
		for(var i = 0; i < this.length; i++) {
			if(f(this[i])) {
				return this[i];
			}
		}
	};
	
	Array.prototype.findAll = function(f) {
		var result = [];
		for(var i = 0; i < this.length; i++) {
			if(f(this[i])) {
				result.push(this[i]);
			}
		}
		return result;
	};
	
	Array.prototype.first = function() {return this[0];};
	
	Array.prototype.last = function() {return this[this.length - 1];};
	
	Array.prototype.flatten = function() {
		var result = [];
		var recursive = function(array) {
			for(var i = 0; i < array.length; i++) {
				if(array[i].constructor === Array) {
					recursive(array[i]);
				} else {
					result.push(array[i]);
				}
			}
		};
		recursive(this);
		
		return result;
	};
	
	xq.pStripTags = xq.compilePattern("</?[^>]+>", "gi");
	String.prototype.stripTags = function() {
	    return this.replace(xq.pStripTags, '');
	};
	String.prototype.escapeHTML = function() {
		xq.textNode.data = this;
		return xq.divNode.innerHTML;
	};
	xq.textNode = document.createTextNode('');
	xq.divNode = document.createElement('div');
	xq.divNode.appendChild(xq.textNode);
	
	xq.pStrip1 = xq.compilePattern("^\\s+");
	xq.pStrip2 = xq.compilePattern("\\s+$");
	String.prototype.strip = function() {
		return this.replace(xq.pStrip1, '').replace(xq.pStrip2, '');
	};
	
	Array.prototype.indexOf = function(n) {
		for(var i = 0; i < this.length; i++) {
			if(this[i] === n) {
				return i;
			}
		}
		
		return -1;
	};
}

Array.prototype.includeElement = function(o) {
	if (this.indexOf(o) !== -1) {
		return true;
	}

    var found = false;
    for(var i = 0; i < this.length; i++) {
    	if(this[i] === o) {
    		return true;
    	}
    }
    
    return false;
};


/**
 * Make given object as event source
 *
 * @param {Object} object target object
 * @param {String} prefix prefix for generated functions
 * @param {Array} events array of string which contains name of events
 */
xq.asEventSource = function(object, prefix, events) {
	object.autoRegisteredEventListeners = [];
	object.registerEventFirer = function(prefix, name) {
		this["_fireOn" + name] = function() {
			for(var i = 0; i < this.autoRegisteredEventListeners.length; i++) {
				var listener = this.autoRegisteredEventListeners[i];
				var func = listener["on" + prefix + name];
				if(func) {
					func.apply(listener, xq.$A(arguments));
				}
			}
		};
	};
	object.addListener = function(l) {
		this.autoRegisteredEventListeners.push(l);
	};
	
	for(var i = 0; i < events.length; i++) {
		object.registerEventFirer(prefix, events[i]);
	}
};



/**
 * JSON to Element mapper
 */
xq.json2element = function(json, doc) {
	var div = doc.createElement("DIV");
	div.innerHTML = xq.json2html(json);
	return div.firstChild || {};
};

/**
 * Element to JSON mapper
 */
xq.element2json = function(element) {
	var o, i, childElements;
	
	if(element.nodeName === 'DL') {
		o = {};
		childElements = xq.findChildElements(element);
		for(i = 0; i < childElements.length; i++) {
			var dt = childElements[i];
			var dd = childElements[++i];
			o[dt.innerHTML] = xq.element2json(xq.findChildElements(dd)[0]);
		}
		return o;
	} else if (element.nodeName === 'OL') {
		o = [];
		childElements = xq.findChildElements(element);
		for(i = 0; i < childElements.length; i++) {
			var li = childElements[i];
			o[i] = xq.element2json(xq.findChildElements(li)[0]);
		}
	} else if(element.nodeName === 'SPAN' && element.className === 'number') {
		return parseFloat(element.innerHTML);
	} else if(element.nodeName === 'SPAN' && element.className === 'string') {
		return element.innerHTML;
	} else { // ignore textnode or unknown tag
		return null;
	}
};

/**
 * JSON to HTML string mapper
 */
xq.json2html = function(json) {
	var sb = [];
	xq._json2html(json, sb);
	return sb.join('');
};

xq._json2html = function(o, sb) {
	if(typeof o === 'number') {
		sb.push('<span class="number">' + o + '</span>');
	} else if(typeof o === 'string') {
		sb.push('<span class="string">' + o.escapeHTML() + '</span>');
	} else if(o.constructor === Array) {
		sb.push('<ol>');
		for(var i = 0; i < o.length; i++) {
			sb.push('<li>');
			xq._json2html(o[i], sb);
			sb.push('</li>');
		}
		sb.push('</ol>');
	} else { // Object
		sb.push('<dl>');
		for (var key in o) if (o.hasOwnProperty(key)) {
			sb.push('<dt>' + key + '</dt>');
			sb.push('<dd>');
			xq._json2html(o[key], sb);
			sb.push('</dd>');
		}
		sb.push('</dl>');
	}
};

xq.findChildElements = function(parent) {
	var childNodes = parent.childNodes;
	var elements = [];
	for(var i = 0; i < childNodes.length; i++) {
		if(childNodes[i].nodeType === 1) {
			elements.push(childNodes[i]);
		}
	}
	return elements;
};



Date.preset = null;
Date.pass = function(msec) {
	if(Date.preset !== null) {
		Date.preset = new Date(Date.preset.getTime() + msec);
	}
};
Date.get = function() {
	return Date.preset === null ? new Date() : Date.preset;
};
Date.prototype.elapsed = function(msec, curDate) {
	return (curDate || Date.get()).getTime() - this.getTime() >= msec;
};

String.prototype.merge = function(data) {
	var newString = this;
	for(var k in data) if(data.hasOwnProperty(k)) {
		newString = newString.replace("{" + k + "}", data[k]);
	}
	return newString;
};
xq.pBlank = xq.compilePattern("^\\s*$");
String.prototype.isBlank = function() {
	return xq.pBlank.test(this);
};
xq.pURL = xq.compilePattern("((((\\w+)://(((([^@:]+)(:([^@]+))?)@)?([^:/\\?#]+)?(:(\\d+))?))?([^\\?#]+)?)(\\?([^#]+))?)(#(.+))?");
String.prototype.parseURL = function() {
	var m = this.match(xq.pURL);
	
	var includeAnchor = m[0];
	var includeQuery = m[1] || undefined;
	var includePath = m[2] || undefined;
	var includeHost = m[3] || undefined;
	var includeBase = null;
	var protocol = m[4] || undefined;
	var user = m[8] || undefined;
	var password = m[10] || undefined;
	var domain = m[11] || undefined;
	var port = m[13] || undefined;
	var path = m[14] || undefined;
	var query = m[16] || undefined;
	var anchor = m[18] || undefined;
	
	if(!path || path === '/') {
		includeBase = includeHost + '/';
	} else {
		var index = path.lastIndexOf('/');
		includeBase = includeHost + path.substring(0, index + 1);
	}
	
	return {
		includeAnchor: includeAnchor,
		includeQuery: includeQuery,
		includePath: includePath,
		includeBase: includeBase,
		includeHost: includeHost,
		protocol: protocol,
		user: user,
		password: password,
		domain: domain,
		port: port,
		path: path,
		query: query,
		anchor: anchor
	};
};



xq.commonAttrs = ['title', 'class', 'id', 'style'];;

/**
 * Pre-defined whitelist
 */
xq.predefinedWhitelist = { 
   'a':				xq.commonAttrs.concat('href', 'charset', 'rev', 'rel', 'type', 'hreflang', 'tabindex'),
   'abbr':			xq.commonAttrs.concat(),
   'acronym':		xq.commonAttrs.concat(),
   'address':		xq.commonAttrs.concat(),
   'blockquote':	xq.commonAttrs.concat('cite'),
   'br':			xq.commonAttrs.concat(),
   'button':		xq.commonAttrs.concat('disabled', 'type', 'name', 'value'),
   'caption':		xq.commonAttrs.concat(),
   'cite':			xq.commonAttrs.concat(),
   'code':			xq.commonAttrs.concat(),
   'dd':			xq.commonAttrs.concat(),
   'dfn':			xq.commonAttrs.concat(),
   'div':			xq.commonAttrs.concat(),
   'dl':			xq.commonAttrs.concat(),
   'dt':			xq.commonAttrs.concat(),
   'em':			xq.commonAttrs.concat(),
   'embed':			xq.commonAttrs.concat('src', 'width', 'height', 'allowscriptaccess', 'type', 'allowfullscreen', 'bgcolor'),
   'h1':			xq.commonAttrs.concat(),
   'h2':			xq.commonAttrs.concat(),
   'h3':			xq.commonAttrs.concat(),
   'h4':			xq.commonAttrs.concat(),
   'h5':			xq.commonAttrs.concat(),
   'h6':			xq.commonAttrs.concat(),
   'hr':			xq.commonAttrs.concat(),
   'iframe':		xq.commonAttrs.concat('name', 'src', 'frameborder', 'scrolling', 'width', 'height', 'longdesc'),
   'input':			xq.commonAttrs.concat('type', 'name', 'value', 'size', 'checked', 'readonly', 'src', 'maxlength'),
   'img':			xq.commonAttrs.concat('alt', 'width', 'height', 'src', 'longdesc'),
   'label':			xq.commonAttrs.concat('for'),
   'kbd':			xq.commonAttrs.concat(),
   'li':			xq.commonAttrs.concat(),
   'object':		xq.commonAttrs.concat('align', 'classid', 'codetype', 'archive', 'width', 'type', 'codebase', 'height', 'data', 'name', 'standby', 'declare'),
   'ol':			xq.commonAttrs.concat(),
   'option':		xq.commonAttrs.concat('disabled', 'selected', 'laabel', 'value'),
   'p':				xq.commonAttrs.concat(),
   'param':			xq.commonAttrs.concat('name', 'value', 'valuetype', 'type'),
   'pre':			xq.commonAttrs.concat(),
   'q':				xq.commonAttrs.concat('cite'),
   'samp':			xq.commonAttrs.concat(),
   'script':		xq.commonAttrs.concat('src', 'type'),
   'select':		xq.commonAttrs.concat('disabled', 'size', 'multiple', 'name'),
   'span':			xq.commonAttrs.concat(),
   'sup':			xq.commonAttrs.concat(),
   'sub':			xq.commonAttrs.concat(),
   'strong':		xq.commonAttrs.concat(),
   'table':			xq.commonAttrs.concat('summary', 'width'),
   'thead':			xq.commonAttrs.concat(),
   'textarea':		xq.commonAttrs.concat('cols', 'disabled', 'rows', 'readonly', 'name'),
   'tbody':			xq.commonAttrs.concat(),
   'th':			xq.commonAttrs.concat('colspan', 'rowspan'),
   'td':			xq.commonAttrs.concat('colspan', 'rowspan'),
   'tr':			xq.commonAttrs.concat(),
   'tt':			xq.commonAttrs.concat(),
   'ul':			xq.commonAttrs.concat(),
   'var':			xq.commonAttrs.concat()
};



/**
 * Automatic finalization queue
 */
xq.autoFinalizeQueue = [];

/**
 * Automatic finalizer
 */
xq.addToFinalizeQueue = function(obj) {
	xq.autoFinalizeQueue.push(obj);
};

/**
 * Finalizes given object
 */
xq.finalize = function(obj) {
	if(typeof obj.finalize === "function") {
		try {obj.finalize();} catch(ignored) {}
	}
	
	for(var key in obj) if(obj.hasOwnProperty(key)) {
		obj[key] = null;
	}
};

xq.observe(window, "unload", function() {
	// "xq" and "xq.autoFinalizeQueue" could be removed by another libraries' clean-up mechanism.
	if(xq && xq.autoFinalizeQueue) {
		for(var i = 0; i < xq.autoFinalizeQueue.length; i++) {
			xq.finalize(xq.autoFinalizeQueue[i]);
		}
		xq = null;
	}
});



/**
 * Finds Xquared's <script> element
 */
xq.findXquaredScript = function() {
    return xq.$A(document.getElementsByTagName("script")).find(function(script) {
    	return script.src && script.src.match(/xquared\.js/i);
    });
};
xq.shouldLoadOthers = function() {
	var script = xq.findXquaredScript();
    return script && !!script.src.match(/xquared\.js\?load_others=1/i);
};
/**
 * Loads javascript from given URL
 */
xq.loadScript = function(url) {
    document.write('<script type="text/javascript" src="' + url + '"></script>');
};

/**
 * Returns all Xquared script file names
 */
xq.getXquaredScriptFileNames = function() {
	return [
		'Xquared.js',
		'Browser.js',
		'DomTree.js',
		'rdom/Base.js',
		'rdom/W3.js',
		'rdom/Gecko.js',
		'rdom/Webkit.js',
		'rdom/Trident.js',
		'rdom/Factory.js',
		'validator/Base.js',
		'validator/W3.js',
		'validator/Gecko.js',
		'validator/Webkit.js',
		'validator/Trident.js',
		'validator/Factory.js',
		'macro/Base.js',
		'macro/Factory.js',
		'macro/FlashMovieMacro.js',
		'macro/IFrameMacro.js',
		'macro/JavascriptMacro.js',
		'EditHistory.js',
		'plugin/Base.js',
		'RichTable.js',
		'Timer.js',
		'Layer.js',
		'ui/Base.js',
		'ui/Control.js',
		'ui/Toolbar.js',
		'ui/_templates.js',
		'Json2.js',
		'Shortcut.js',
		'Editor.js'
	];
};
xq.getXquaredScriptBasePath = function() {
	var script = xq.findXquaredScript();
	return script.src.match(/(.*\/)xquared\.js.*/i)[1];
};

xq.loadOthers = function() {
	var basePath = xq.getXquaredScriptBasePath();
	var others = xq.getXquaredScriptFileNames();
	
	// Xquared.js(this file) should not be loaded again. So the value of "i" starts with 1 instead of 0
	for(var i = 1; i < others.length; i++) {
		xq.loadScript(basePath + others[i]);
	}
};

if(xq.shouldLoadOthers()) {
	xq.loadOthers();
}
/**
 * @namespace Contains browser detection codes
 * 
 * @requires Xquared.js
 */
xq.Browser = new function() {
	// By Rendering Engines
	
	/** 
	 * True if rendering engine is Trident
	 * @type boolean
	 */
	this.isTrident = navigator.appName === "Microsoft Internet Explorer",
	
	/**
	 * True if rendering engine is Webkit
	 * @type boolean
	 */
	this.isWebkit = navigator.userAgent.indexOf('AppleWebKit/') > -1,
	
	/**
	 * True if rendering engine is Gecko
	 * @type boolean
	 */
	this.isGecko = navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') === -1,
	
	/**
	 * True if rendering engine is KHTML
	 * @type boolean
	 */
	this.isKHTML = navigator.userAgent.indexOf('KHTML') !== -1,
	
	/**
	 * True if rendering engine is Presto
	 * @type boolean
	 */
	this.isPresto = navigator.appName === "Opera",
	
	
	
	// By Platforms
	/**
	 * True if platform is Mac
	 * @type boolean
	 */
	this.isMac = navigator.userAgent.indexOf("Macintosh") !== -1,
	
	/**
	 * True if platform is Ubuntu Linux
	 * @type boolean
	 */
	this.isUbuntu = navigator.userAgent.indexOf('Ubuntu') !== -1,
	
	/**
	 * True if platform is Windows
	 * @type boolean
	 */
	this.isWin = navigator.userAgent.indexOf('Windows') !== -1,



	// By Browsers
	/**
	 * True if browser is Internet Explorer
	 * @type boolean
	 */
	this.isIE = navigator.appName === "Microsoft Internet Explorer",
	
	/**
	 * True if browser is Internet Explorer 6
	 * @type boolean
	 */
	this.isIE6 = navigator.userAgent.indexOf('MSIE 6') !== -1,
	
	/**
	 * True if browser is Internet Explorer 7
	 * @type boolean
	 */
	this.isIE7 = navigator.userAgent.indexOf('MSIE 7') !== -1,
	
	/**
	 * True if browser is Internet Explorer 8
	 * @type boolean
	 */
	this.isIE8 = navigator.userAgent.indexOf('MSIE 8') !== -1,
	
	/**
	 * True if browser is Firefox
	 * @type boolean
	 */
	this.isFF = navigator.userAgent.indexOf('Firefox') !== -1,
	
	/**
	 * True if browser is Firefox 2
	 * @type boolean
	 */
	this.isFF2 = navigator.userAgent.indexOf('Firefox/2') !== -1,
	
	/**
	 * True if browser is Firefox 3
	 * @type boolean
	 */
	this.isFF3 = navigator.userAgent.indexOf('Firefox/3') !== -1,
	
	/**
	 * True if browser is Safari
	 * @type boolean
	 */
	this.isSafari = navigator.userAgent.indexOf('Safari') !== -1
};
/**
 * @requires Xquared.js
 */
xq.Timer = xq.Class(/** @lends xq.Timer.prototype */{
	/**
     * @constructs
     * 
     * @param {Number} precision precision in milliseconds
	 */
	initialize: function(precision) {
		xq.addToFinalizeQueue(this);
	
		this.precision = precision;
		this.jobs = {};
		this.nextJobId = 0;
		
		this.checker = null;
	},
	
	finalize: function() {
		this.stop();
	},
	
	/**
	 * starts timer
	 */
	start: function() {
		this.stop();
		
		this.checker = window.setInterval(function() {
			this.executeJobs();
		}.bind(this), this.precision);
	},
	
	/**
	 * stops timer
	 */
	stop: function() {
		if(this.checker) window.clearInterval(this.checker);
	},
	
	/**
	 * registers new job
	 * 
	 * @param {Function} job function to execute
	 * @param {Number} interval interval in milliseconds
	 * 
	 * @return {Number} job id
	 */
	register: function(job, interval) {
		var jobId = this.nextJobId++;
		
		this.jobs[jobId] = {
			func:job,
			interval: interval,
			lastExecution: Date.get()
		};
		
		return jobId;
	},
	
	/**
	 * unregister job by job id
	 * 
	 * @param {Number} job id
	 */
	unregister: function(jobId) {
		delete this.jobs[jobId];
	},
	
	/**
	 * Execute all expired jobs immedialty. This method will be called automatically by interval timer.
	 */
	executeJobs: function() {
		var curDate = new Date();
		
		for(var id in this.jobs) {
			var job = this.jobs[id];
			if(job.lastExecution.elapsed(job.interval, curDate)) {
				try {
					job.lastReturn = job.func();
				} catch(e) {
					job.lastException = e;
				} finally {
					job.lastExecution = curDate;
				}
			}
		}
	}
});
/**
 * @requires Xquared.js
 */
xq.DomTree = xq.Class(/** @lends xq.DomTree.prototype */{
	/**
	 * Provides various tree operations.
	 *
	 * TODO: Add specs
	 *
	 * @constructs
	 */
	initialize: function() {
		xq.addToFinalizeQueue(this);
		
		this._blockTags = ["DIV", "DD", "LI", "ADDRESS", "CAPTION", "DT", "H1", "H2", "H3", "H4", "H5", "H6", "HR", "P", "BODY", "BLOCKQUOTE", "PRE", "PARAM", "DL", "OL", "UL", "TABLE", "THEAD", "TBODY", "TR", "TH", "TD"];
		this._blockContainerTags = ["DIV", "DD", "LI", "BODY", "BLOCKQUOTE", "UL", "OL", "DL", "TABLE", "THEAD", "TBODY", "TR", "TH", "TD"];
		this._listContainerTags = ["OL", "UL", "DL"];
		this._tableCellTags = ["TH", "TD"];
		this._blockOnlyContainerTags = ["BODY", "BLOCKQUOTE", "UL", "OL", "DL", "TABLE", "THEAD", "TBODY", "TR"];
		this._atomicTags = ["IMG", "OBJECT", "PARAM", "BR", "HR"];
	},
	
	getBlockTags: function() {
		return this._blockTags;
	},
	
	/**
	 * Find common ancestor(parent) and his immediate children(left and right).<br />
	 *<br />
	 * A --- B -+- C -+- D -+- E<br />
	 *          |<br />
	 *          +- F -+- G<br />
	 *<br />
	 * For example:<br />
	 * > findCommonAncestorAndImmediateChildrenOf("E", "G")<br />
	 *<br />
	 * will return<br />
	 *<br />
	 * > {parent:"B", left:"C", right:"F"}
	 */
	findCommonAncestorAndImmediateChildrenOf: function(left, right) {
		if(left.parentNode === right.parentNode) {
			return {
				left:left,
				right:right,
				parent:left.parentNode
			};
		} else {
			var parentsOfLeft = this.collectParentsOf(left, true);
			var parentsOfRight = this.collectParentsOf(right, true);
			var ca = this.getCommonAncestor(parentsOfLeft, parentsOfRight);
	
			var leftAncestor = parentsOfLeft.find(function(node) {return node.parentNode === ca});
			var rightAncestor = parentsOfRight.find(function(node) {return node.parentNode === ca});
			
			return {
				left:leftAncestor,
				right:rightAncestor,
				parent:ca
			};
		}
	},
	
	/**
	 * Find leaves at edge.<br />
	 *<br />
	 * A --- B -+- C -+- D -+- E<br />
	 *          |<br />
	 *          +- F -+- G<br />
	 *<br />
	 * For example:<br />
	 * > getLeavesAtEdge("A")<br />
	 *<br />
	 * will return<br />
	 *<br />
	 * > ["E", "G"]
	 */
	getLeavesAtEdge: function(element) {
		if(!element.hasChildNodes()) return [null, null];
		
		var findLeft = function(el) {
			for (var i = 0; i < el.childNodes.length; i++) {
				if (el.childNodes[i].nodeType === 1 && this.isBlock(el.childNodes[i])) return findLeft(el.childNodes[i]);
			}
			return el;
		}.bind(this);
		
		var findRight=function(el) {
			for (var i = el.childNodes.length; i--;) {
				if (el.childNodes[i].nodeType === 1 && this.isBlock(el.childNodes[i])) return findRight(el.childNodes[i]);
			}
			return el;
		}.bind(this);
		
		var left = findLeft(element);
		var right = findRight(element);
		
		return [left === element ? null : left, right === element ? null : right];
	},
	
	getCommonAncestor: function(parents1, parents2) {
		for(var i = 0; i < parents1.length; i++) {
			for(var j = 0; j < parents2.length; j++) {
				if(parents1[i] === parents2[j]) return parents1[i];
			}
		}
	},
	
	collectParentsOf: function(node, includeSelf, exitCondition) {
		var parents = [];
		if(includeSelf) parents.push(node);
		
		while((node = node.parentNode) && (node.nodeName !== "HTML") && !(typeof exitCondition === "function" && exitCondition(node))) parents.push(node);
		return parents;
	},
	
	isDescendantOf: function(parent, child) {
		if(parent.length > 0) {
			for(var i = 0; i < parent.length; i++) {
				if(this.isDescendantOf(parent[i], child)) return true;
			}
			return false;
		}
		
		if(parent === child) return false;
		
	    while (child = child.parentNode)
	      if (child === parent) return true;
	    return false;
	},
	
	/**
	 * Perform tree walking (foreward)
	 */
	walkForward: function(node) {
		var target = node.firstChild;
		if(target) return target;
		
		// intentional assignment for micro performance turing
		if(target = node.nextSibling) return target;
		
		while(node = node.parentNode) {
			// intentional assignment for micro performance turing
			if(target = node.nextSibling) return target;
		}
		
		return null;
	},
	
	/**
	 * Perform tree walking (backward)
	 */
	walkBackward: function(node) {
		if(node.previousSibling) {
			node = node.previousSibling;
			while(node.hasChildNodes()) {node = node.lastChild;}
			return node;
		}
		
		return node.parentNode;
	},
	
	/**
	 * Perform tree walking (to next siblings)
	 */
	walkNext: function(node) {return node.nextSibling},
	
	/**
	 * Perform tree walking (to next siblings)
	 */
	walkPrev: function(node) {return node.previousSibling},
	
	/**
	 * Returns true if target is followed by start
	 */
	checkTargetForward: function(start, target) {
		return this._check(start, this.walkForward, target);
	},

	/**
	 * Returns true if start is followed by target
	 */
	checkTargetBackward: function(start, target) {
		return this._check(start, this.walkBackward, target);
	},
	
	findForward: function(start, condition, exitCondition) {
		return this._find(start, this.walkForward, condition, exitCondition);
	},
	
	findBackward: function(start, condition, exitCondition) {
		return this._find(start, this.walkBackward, condition, exitCondition);
	},
	
	_check: function(start, direction, target) {
		if(start === target) return false;
		
		while(start = direction(start)) {
			if(start === target) return true;
		}
		return false;
	},
	
	_find: function(start, direction, condition, exitCondition) {
		while(start = direction(start)) {
			if(exitCondition && exitCondition(start)) return null;
			if(condition(start)) return start;
		}
		return null;
	},

	/**
	 * Walks Forward through DOM tree from start to end, and collects all nodes that matches with a filter.
	 * If no filter provided, it just collects all nodes.
	 *
	 * @param {Element} start Starting element.
	 * @param {Element} end Ending element.
	 * @param {Function} filter A filter function.
	 */
	collectNodesBetween: function(start, end, filter) {
		if(start === end) return [start, end].findAll(filter || function() {return true});
		
		var nodes = this.collectForward(start, function(node) {return node === end}, filter);
		if(
			start !== end &&
			typeof filter === "function" &&
			filter(end)
		) nodes.push(end);
		
		return nodes;
	},

	collectForward: function(start, exitCondition, filter) {
		return this.collect(start, this.walkForward, exitCondition, filter);
	},
	
	collectBackward: function(start, exitCondition, filter) {
		return this.collect(start, this.walkBackward, exitCondition, filter);
	},
	
	collectNext: function(start, exitCondition, filter) {
		return this.collect(start, this.walkNext, exitCondition, filter);
	},
	
	collectPrev: function(start, exitCondition, filter) {
		return this.collect(start, this.walkPrev, exitCondition, filter);
	},
	
	collect: function(start, next, exitCondition, filter) {
		var nodes = [start];

		while(true) {
			start = next(start);
			if(
				(start === null) ||
				(typeof exitCondition === "function" && exitCondition(start))
			) break;
			
			nodes.push(start);
		}

		return (typeof filter === "function") ? nodes.findAll(filter) : nodes;
	},

	hasBlocks: function(element) {
		var nodes = element.childNodes;
		for(var i = 0; i < nodes.length; i++) {
			if(this.isBlock(nodes[i])) return true;
		}
		return false;
	},
	
	hasMixedContents: function(element) {
		if(!this.isBlock(element)) return false;
		if(!this.isBlockContainer(element)) return false;
		
		var hasTextOrInline = false;
		var hasBlock = false;
		for(var i = 0; i < element.childNodes.length; i++) {
			var node = element.childNodes[i];
			if(!hasTextOrInline && this.isTextOrInlineNode(node)) hasTextOrInline = true;
			if(!hasBlock && this.isBlock(node)) hasBlock = true;
			
			if(hasTextOrInline && hasBlock) break;
		}
		if(!hasTextOrInline || !hasBlock) return false;
		
		return true;
	},
	
	isBlockOnlyContainer: function(element) {
		if(!element) return false;
		return this._blockOnlyContainerTags.indexOf(typeof element === 'string' ? element : element.nodeName) !== -1;
	},
	
	isTableCell: function(element) {
		if(!element) return false;
		return this._tableCellTags.indexOf(typeof element === 'string' ? element : element.nodeName) !== -1;
	},
	
	isBlockContainer: function(element) {
		if(!element) return false;
		return this._blockContainerTags.indexOf(typeof element === 'string' ? element : element.nodeName) !== -1;
	},
	
	isHeading: function(element) {
		if(!element) return false;
		return (typeof element === 'string' ? element : element.nodeName).match(/H\d/);
	},
	
	isBlock: function(element) {
		if(!element) return false;
		return this._blockTags.indexOf(typeof element === 'string' ? element : element.nodeName) !== -1;
	},
	
	isAtomic: function(element) {
		if(!element) return false;
		return this._atomicTags.indexOf(typeof element === 'string' ? element : element.nodeName) !== -1;
	},
	
	isListContainer: function(element) {
		if(!element) return false;
		return this._listContainerTags.indexOf(typeof element === 'string' ? element : element.nodeName) !== -1;
	},
	
	isTextOrInlineNode: function(node) {
		return node && (node.nodeType === 3 || !this.isBlock(node));
	}
});
/**
 * @namespace
 */
xq.rdom = {}

/**
 * @requires Xquared.js
 * @requires DomTree.js
 */
xq.rdom.Base = xq.Class(/** @lends xq.rdom.Base.prototype */{
	/**
	 * Encapsulates browser incompatibility problem and provides rich set of DOM manipulation API.<br />
	 * <br />
	 * Base provides basic CRUD + Advanced DOM manipulation API, various query methods and caret/selection management API.	 
	 *
     * @constructs
	 */
	initialize: function() {
		xq.addToFinalizeQueue(this);

		/**
		 * Instance of DomTree
		 * @type xq.DomTree
		 */
		this.tree = new xq.DomTree();
		this.focused = false;
		this._lastMarkerId = 0;
	},
	
	
	
	/**
	 * Initialize Base instance using window object.
	 * Reads document and body from window object and sets them as a property
	 * 
	 * @param {Window} win Browser's window object
	 */
	setWin: function(win) {
		if(!win) throw "[win] is null";
		this.win = win;
	},
	
	/**
	 * Initialize Base instance using root element.
	 * Reads window and document from root element and sets them as a property.
	 * 
	 * @param {Element} root Root element
	 */
	setRoot: function(root) {
		if(!root) throw "[root] is null";
		this.root = root;
	},
	
	/**
	 * @returns Browser's window object.
	 */
	getWin: function() {
		return this.win ||
			(this.root ? (this.root.ownerDocument.defaultView || this.root.ownerDocument.parentWindow) : window);
	},
	
	/**
	 * @returns Root element.
	 */
	getRoot: function() {
		return this.root || this.win.document.body;
	},
	
	/**
	 * @returns Document object of root element.
	 */
	getDoc: function() {
		return this.getWin().document || this.getRoot().ownerDocument;
	},
	
	
	
	/////////////////////////////////////////////
	// CRUDs
	
	clearRoot: function() {
		this.getRoot().innerHTML = "";
		this.getRoot().appendChild(this.makeEmptyParagraph());
	},
	
	/**
	 * Removes place holders and empty text nodes of given element.
	 *
	 * @param {Element} element target element
	 */
	removePlaceHoldersAndEmptyNodes: function(element) {
		if(!element.hasChildNodes()) return;
		
		var stopAt = this.getBottommostLastChild(element);
		if(!stopAt) return;
		stopAt = this.tree.walkForward(stopAt);
		
		while(element && element !== stopAt) {
			if(
					this.isPlaceHolder(element) ||
					(element.nodeType === 3 && (element.nodeValue === "" || (!element.nextSibling && element.nodeValue.isBlank())))
			) {
				var deleteTarget = element;
				element = this.tree.walkForward(element);
				this.deleteNode(deleteTarget);
			} else {
				element = this.tree.walkForward(element);
			}
		}
	},
	
	/**
	 * Sets multiple attributes into element at once
	 *
	 * @param {Element} element target element
	 * @param {Object} map key-value pairs
	 */
	setAttributes: function(element, map) {
		for(var key in map) element.setAttribute(key, map[key]);
	},

	/**
	 * Creates textnode by given node value.
	 *
	 * @param {String} value value of textnode
	 * @returns {Node} Created text node
	 */	
	createTextNode: function(value) {return this.getDoc().createTextNode(value);},

	/**
	 * Creates empty element by given tag name.
	 *
	 * @param {String} tagName name of tag
	 * @returns {Element} Created element
	 */	
	createElement: function(tagName) {return this.getDoc().createElement(tagName);},

	/**
	 * Creates element from HTML string
	 * 
	 * @param {String} html HTML string
	 * @returns {Element} Created element
	 */
	createElementFromHtml: function(html) {
		var node = this.createElement("div");
		node.innerHTML = html;
		if(node.childNodes.length !== 1) {
			throw "Illegal HTML fragment";
		}
		return this.getFirstChild(node);
	},
	
	/**
	 * Deletes node from DOM tree.
	 *
	 * @param {Node} node Target node which should be deleted
	 * @param {boolean} deleteEmptyParentsRecursively Recursively delete empty parent elements
	 * @param {boolean} correctEmptyParent Call #correctEmptyElement on empty parent element after deletion
	 */	
	deleteNode: function(node, deleteEmptyParentsRecursively, correctEmptyParent) {
		if(!node || !node.parentNode) return;
		if(node.nodeName === "BODY") throw "Cannot delete BODY";
		
		var parent = node.parentNode;
		parent.removeChild(node);
		
		if(deleteEmptyParentsRecursively) {
			while(!parent.hasChildNodes()) {
				node = parent;
				parent = node.parentNode;
				if(!parent || this.getRoot() === node) break;
				parent.removeChild(node);
			}
		}
		
		if(correctEmptyParent && this.isEmptyBlock(parent)) {
			parent.innerHTML = "";
			this.correctEmptyElement(parent);
		}
	},

	/**
	 * Inserts given node into current caret position
	 *
	 * @param {Node} node Target node
	 * @returns {Node} Inserted node. It could be different with given node.
	 */
	insertNode: function(node) {throw "Not implemented"},

	/**
	 * Inserts given html into current caret position
	 *
	 * @param {String} html HTML string
	 * @returns {Node} Inserted node. It could be different with given node.
	 */
	insertHtml: function(html) {
		return this.insertNode(this.createElementFromHtml(html));
	},
	
	/**
	 * Creates textnode from given text and inserts it into current caret position
	 *
	 * @param {String} text Value of textnode
	 * @returns {Node} Inserted node
	 */
	insertText: function(text) {
		this.insertNode(this.createTextNode(text));
	},
	
	/**
	 * Places given node nearby target.
	 *
	 * @param {Node} node Node to be inserted.
	 * @param {Node} target Target node.
	 * @param {String} where Possible values: "before", "start", "end", "after"
	 * @param {boolean} performValidation Validate node if needed. For example when P placed into UL, its tag name automatically replaced with LI
	 *
	 * @returns {Node} Inserted node. It could be different with given node.
	 */
	insertNodeAt: function(node, target, where, performValidation) {
		if(
			["HTML", "HEAD"].indexOf(target.nodeName) !== -1 ||
			"BODY" === target.nodeName && ["before", "after"].indexOf(where) !== -1
		) throw "Illegal argument. Cannot move node[" + node.nodeName + "] to '" + where + "' of target[" + target.nodeName + "]"
		
		var object;
		var message;
		var secondParam;
		
		switch(where.toLowerCase()) {
			case "before":
				object = target.parentNode;
				message = 'insertBefore';
				secondParam = target;
				break
			case "start":
				if(target.firstChild) {
					object = target;
					message = 'insertBefore';
					secondParam = target.firstChild;
				} else {
					object = target;
					message = 'appendChild';
				}
				break
			case "end":
				object = target;
				message = 'appendChild';
				break
			case "after":
				if(target.nextSibling) {
					object = target.parentNode;
					message = 'insertBefore';
					secondParam = target.nextSibling;
				} else {
					object = target.parentNode;
					message = 'appendChild';
				}
				break
		}

		if(performValidation && this.tree.isListContainer(object) && node.nodeName !== "LI") {
			var li = this.createElement("LI");
			li.appendChild(node);
			node = li;
			object[message](node, secondParam);		
		} else if(performValidation && !this.tree.isListContainer(object) && node.nodeName === "LI") {
			this.wrapAllInlineOrTextNodesAs("P", node, true);
			var div = this.createElement("DIV");
			this.moveChildNodes(node, div);
			this.deleteNode(node);
			object[message](div, secondParam);
			node = this.unwrapElement(div, true);
		} else {
			object[message](node, secondParam);
		}
		
		return node;
	},

	/**
	 * Creates textnode from given text and places given node nearby target.
	 *
	 * @param {String} text Text to be inserted.
	 * @param {Node} target Target node.
	 * @param {String} where Possible values: "before", "start", "end", "after"
	 *
	 * @returns {Node} Inserted node.
	 */
	insertTextAt: function(text, target, where) {
		return this.insertNodeAt(this.createTextNode(text), target, where);
	},

	/**
	 * Creates element from given HTML string and places given it nearby target.
	 *
	 * @param {String} html HTML to be inserted.
	 * @param {Node} target Target node.
	 * @param {String} where Possible values: "before", "start", "end", "after"
	 *
	 * @returns {Node} Inserted node.
	 */
	insertHtmlAt: function(html, target, where) {
		return this.insertNodeAt(this.createElementFromHtml(html), target, where);
	},

	/**
	 * Replaces element's tag by removing current element and creating new element by given tag name.
	 *
	 * @param {String} tag New tag name
	 * @param {Element} element Target element
	 *
	 * @returns {Element} Replaced element
	 */	
	replaceTag: function(tag, element) {
		if(element.nodeName === tag) return null;
		if(this.tree.isTableCell(element)) return null;
		
		var newElement = this.createElement(tag);
		this.moveChildNodes(element, newElement);
		this.copyAttributes(element, newElement, true);
		element.parentNode.replaceChild(newElement, element);
		
		if(!newElement.hasChildNodes()) this.correctEmptyElement(newElement);
		
		return newElement;
	},

	/**
	 * Unwraps unnecessary paragraph.
	 *
	 * Unnecessary paragraph is P which is the only child of given container element.
	 * For example, P which is contained by LI and is the only child is the unnecessary paragraph.
	 * But if given container element is a block-only-container(BLOCKQUOTE, BODY), this method does nothing.
	 *
	 * @param {Element} element Container element
	 * @returns {boolean} True if unwrap performed.
	 */
	unwrapUnnecessaryParagraph: function(element) {
		if(!element) return false;
		
		if(!this.tree.isBlockOnlyContainer(element) && element.childNodes.length === 1 && element.firstChild.nodeName === "P" && !this.hasImportantAttributes(element.firstChild)) {
			var p = element.firstChild;
			this.moveChildNodes(p, element);
			this.deleteNode(p);
			return true;
		}
		return false;
	},
	
	/**
	 * Unwraps element by extracting all children out and removing the element.
	 *
	 * @param {Element} element Target element
	 * @param {boolean} wrapInlineAndTextNodes Wrap all inline and text nodes with P before unwrap
	 * @returns {Node} First child of unwrapped element
	 */
	unwrapElement: function(element, wrapInlineAndTextNodes) {
		if(wrapInlineAndTextNodes) this.wrapAllInlineOrTextNodesAs("P", element);
		
		var nodeToReturn = element.firstChild;
		
		while(element.firstChild) this.insertNodeAt(element.firstChild, element, "before");
		this.deleteNode(element);
		
		return nodeToReturn;
	},
	
	/**
	 * Wraps element by given tag
	 *
	 * @param {String} tag tag name
	 * @param {Element} element target element to wrap
	 * @returns {Element} wrapper
	 */
	wrapElement: function(tag, element) {
		var wrapper = this.insertNodeAt(this.createElement(tag), element, "before");
		wrapper.appendChild(element);
		return wrapper;
	},
	
	/**
	 * Tests #smartWrap with given criteria but doesn't change anything
	 */
	testSmartWrap: function(endElement, criteria) {
		return this.smartWrap(endElement, null, criteria, true);
	},
	
	/**
	 * Create inline element with given tag name and wraps nodes nearby endElement by given criteria
	 *
	 * @param {Element} endElement Boundary(end point, exclusive) of wrapper.
	 * @param {String} tag Tag name of wrapper.
	 * @param {Object} function which returns text index of start boundary.
	 * @param {boolean} testOnly just test boundary and do not perform actual wrapping.
	 *
	 * @returns {Element} wrapper
	 */
	smartWrap: function(endElement, tag, criteria, testOnly) {
		var block = this.getParentBlockElementOf(endElement);

		tag = tag || "SPAN";
		criteria = criteria || function(text) {return -1};
		
		// check for empty wrapper
		if(!testOnly && (!endElement.previousSibling || this.isEmptyBlock(block))) {
			var wrapper = this.insertNodeAt(this.createElement(tag), endElement, "before");
			return wrapper;
		}
		
		// collect all textnodes
		var textNodes = this.tree.collectForward(block, function(node) {return node === endElement}, function(node) {return node.nodeType === 3});
		
		// find textnode and break-point
		var nodeIndex = 0;
		var nodeValues = [];
		for(var i = 0; i < textNodes.length; i++) {
			nodeValues.push(textNodes[i].nodeValue);
		}
		var textToWrap = nodeValues.join("");
		var textIndex = criteria(textToWrap)
		var breakPoint = textIndex;
		
		if(breakPoint === -1) {
			breakPoint = 0;
		} else {
			textToWrap = textToWrap.substring(breakPoint);
		}
		
		for(var i = 0; i < textNodes.length; i++) {
			if(breakPoint > nodeValues[i].length) {
				breakPoint -= nodeValues[i].length;
			} else {
				nodeIndex = i;
				break;
			}
		}
		
		if(testOnly) return {text:textToWrap, textIndex:textIndex, nodeIndex:nodeIndex, breakPoint:breakPoint};
		
		// break textnode if necessary 
		if(breakPoint !== 0) {
			var splitted = textNodes[nodeIndex].splitText(breakPoint);
			nodeIndex++;
			textNodes.splice(nodeIndex, 0, splitted);
		}
		var startElement = textNodes[nodeIndex] || block.firstChild;
		
		// split inline elements up to parent block if necessary
		var family = this.tree.findCommonAncestorAndImmediateChildrenOf(startElement, endElement);
		var ca = family.parent;
		if(ca) {
			if(startElement.parentNode !== ca) startElement = this.splitElementUpto(startElement, ca, true);
			if(endElement.parentNode !== ca) endElement = this.splitElementUpto(endElement, ca, true);
			
			var prevStart = startElement.previousSibling;
			var nextEnd = endElement.nextSibling;
			
			// remove empty inline elements
			if(prevStart && prevStart.nodeType === 1 && this.isEmptyBlock(prevStart)) this.deleteNode(prevStart);
			if(nextEnd && nextEnd.nodeType === 1 && this.isEmptyBlock(nextEnd)) this.deleteNode(nextEnd);
			
			// wrap
			var wrapper = this.insertNodeAt(this.createElement(tag), startElement, "before");
			while(wrapper.nextSibling !== endElement) wrapper.appendChild(wrapper.nextSibling);
			return wrapper;
		} else {
			// wrap
			var wrapper = this.insertNodeAt(this.createElement(tag), endElement, "before");
			return wrapper;
		}
	},
	
	/**
	 * Wraps all adjust inline elements and text nodes into block element.
	 *
	 * TODO: empty element should return empty array when it is not forced and (at least) single item array when forced
	 *
	 * @param {String} tag Tag name of wrapper
	 * @param {Element} element Target element
	 * @param {boolean} force Force wrapping. If it is set to false, this method do not makes unnecessary wrapper.
	 *
	 * @returns {Array} Array of wrappers. If nothing performed it returns empty array
	 */
	wrapAllInlineOrTextNodesAs: function(tag, element, force) {
		var wrappers = [];
		
		if(!force && !this.tree.hasMixedContents(element)) return wrappers;
		
		var node = element.firstChild;
		while(node) {
			if(this.tree.isTextOrInlineNode(node)) {
				var wrapper = this.wrapInlineOrTextNodesAs(tag, node);
				wrappers.push(wrapper);
				node = wrapper.nextSibling;
			} else {
				node = node.nextSibling;
			}
		}

		return wrappers;
	},

	/**
	 * Wraps node and its adjust next siblings into an element
	 */
	wrapInlineOrTextNodesAs: function(tag, node) {
		var wrapper = this.createElement(tag);
		var from = node;

		from.parentNode.replaceChild(wrapper, from);
		wrapper.appendChild(from);

		// move nodes into wrapper
		while(wrapper.nextSibling && this.tree.isTextOrInlineNode(wrapper.nextSibling)) wrapper.appendChild(wrapper.nextSibling);

		return wrapper;
	},
	
	/**
	 * Turns block element into list item
	 *
	 * @param {Element} element Target element
	 * @param {String} type One of "UL", "OL".
	 * @param {String} className CSS class name.
	 *
	 * @return {Element} LI element
	 */
	turnElementIntoListItem: function(element, type, className) {
		type = type.toUpperCase();
		className = className || "";
		
		var container = this.createElement(type);
		if(className) container.className = className;
		
		if(this.tree.isTableCell(element)) {
			var p = this.wrapAllInlineOrTextNodesAs("P", element, true)[0];
			container = this.insertNodeAt(container, element, "start");
			var li = this.insertNodeAt(this.createElement("LI"), container, "start");
			li.appendChild(p);
		} else {
			container = this.insertNodeAt(container, element, "after");
			var li = this.insertNodeAt(this.createElement("LI"), container, "start");
			li.appendChild(element);
		}
		
		this.unwrapUnnecessaryParagraph(li);
		this.mergeAdjustLists(container);
		
		return li;
	},
	
	/**
	 * Extracts given element out from its parent element.
	 * 
	 * @param {Element} element Target element
	 */
	extractOutElementFromParent: function(element) {
		if(element === this.getRoot() || element.parentNode === this.getRoot() || !element.offsetParent) return null;
		
		if(element.nodeName === "LI") {
			this.wrapAllInlineOrTextNodesAs("P", element, true);
			element = element.firstChild;
		}

		var container = element.parentNode;
		var nodeToReturn = null;
		
		if(container.nodeName === "LI" && container.parentNode.parentNode.nodeName === "LI") {
			// nested list item
			if(element.previousSibling) {
				this.splitContainerOf(element, true);
				this.correctEmptyElement(element);
			}
			
			this.outdentListItem(element);
			nodeToReturn = element;
		} else if(container.nodeName === "LI") {
			// not-nested list item
			
			if(this.tree.isListContainer(element.nextSibling)) {
				// 1. split listContainer
				var listContainer = container.parentNode;
				this.splitContainerOf(container, true);
				this.correctEmptyElement(element);
				
				// 2. extract out LI's children
				nodeToReturn = container.firstChild;
				while(container.firstChild) {
					this.insertNodeAt(container.firstChild, listContainer, "before");
				}
				
				// 3. remove listContainer and merge adjust lists
				var prevContainer = listContainer.previousSibling;
				this.deleteNode(listContainer);
				if(prevContainer && this.tree.isListContainer(prevContainer)) this.mergeAdjustLists(prevContainer);
			} else {
				// 1. split LI
				this.splitContainerOf(element, true);
				this.correctEmptyElement(element);
				
				// 2. split list container
				var listContainer = this.splitContainerOf(container);
				
				// 3. extract out
				this.insertNodeAt(element, listContainer.parentNode, "before");
				this.deleteNode(listContainer.parentNode);
				
				nodeToReturn = element;
			}
		} else if(this.tree.isTableCell(container) || this.tree.isTableCell(element)) {
			// do nothing
		} else {
			// normal block
			this.splitContainerOf(element, true);
			this.correctEmptyElement(element);
			nodeToReturn = this.insertNodeAt(element, container, "before");
			
			this.deleteNode(container);
		}
		
		return nodeToReturn;
	},
	
	/**
	 * Insert new block above or below given element.
	 *
	 * @param {Element} block Target block
	 * @param {boolean} before Insert new block above(before) target block
	 * @param {String} forceTag New block's tag name. If omitted, target block's tag name will be used.
	 *
	 * @returns {Element} Inserted block
	 */
	insertNewBlockAround: function(block, before, forceTag) {
		var isListItem = block.nodeName === "LI" || block.parentNode.nodeName === "LI";
		
		this.removeTrailingWhitespace(block);
		if(this.isFirstLiWithNestedList(block) && !forceTag && before) {
			var li = this.getParentElementOf(block, ["LI"]);
			var newBlock = this._insertNewBlockAround(li, before);
			return newBlock;
		} else if(isListItem && !forceTag) {
			var li = this.getParentElementOf(block, ["LI"]);
			var newBlock = this._insertNewBlockAround(block, before);
			if(li !== block) newBlock = this.splitContainerOf(newBlock, false, "prev");
			return newBlock;
		} else if(this.tree.isBlockContainer(block)) {
			this.wrapAllInlineOrTextNodesAs("P", block, true);
			return this._insertNewBlockAround(block.firstChild, before, forceTag);
		} else {
			return this._insertNewBlockAround(block, before, this.tree.isHeading(block) ? "P" : forceTag);
		}
	},
	
	/**
	 * @private
	 *
	 * TODO: Rename
	 */
	_insertNewBlockAround: function(element, before, tagName) {
		var newElement = this.createElement(tagName || element.nodeName);
		this.copyAttributes(element, newElement, false);
		this.correctEmptyElement(newElement);
		newElement = this.insertNodeAt(newElement, element, before ? "before" : "after");
		return newElement;
	},
	
	/**
	 * Wrap or replace element with given tag name.
	 *
	 * @param {String} [tag] Tag name. If not provided, it does not modify tag name.
	 * @param {Element} element Target element
	 * @param {String} [className] Class name of tag. If not provided, it does not modify current class name, and if empty string is provided, class attribute will be removed.
	 *
	 * @return {Element} wrapper element or replaced element.
	 */
	applyTagIntoElement: function(tag, element, className) {
		if(!tag && !className) return null;
		
		var result = element;
		
		if(tag) {
			if(this.tree.isBlockOnlyContainer(tag)) {
				result = this.wrapBlock(tag, element);
			} else if(this.tree.isBlockContainer(element)) {
				var wrapper = this.createElement(tag);
				this.moveChildNodes(element, wrapper);
				result = this.insertNodeAt(wrapper, element, "start");
			} else if(this.tree.isBlockContainer(tag) && this.hasImportantAttributes(element)) {
				result = this.wrapBlock(tag, element);
			} else {
				result = this.replaceTag(tag, element);
			}
		}
		
		if(className) {
			result.className = className;
		}	
		
		return result;
	},
	
	/**
	 * Wrap or replace elements with given tag name.
	 *
	 * @param {String} [tag] Tag name. If not provided, it does not modify tag name.
	 * @param {Element} from Start boundary (inclusive)
	 * @param {Element} to End boundary (inclusive)
	 * @param {String} [className] Class name of tag. If not provided, it does not modify current class name, and if empty string is provided, class attribute will be removed.
	 *
	 * @returns {Array} Array of wrappers or replaced elements
	 */
	applyTagIntoElements: function(tagName, from, to, className) {
		if(!tagName && !className) return [from, to];
		
		var applied = [];
		
		if(tagName) {
			if(this.tree.isBlockContainer(tagName)) {
				var family = this.tree.findCommonAncestorAndImmediateChildrenOf(from, to);
				var node = family.left;
				var wrapper = this.insertNodeAt(this.createElement(tagName), node, "before");
				
				var coveringWholeList =
					family.parent.nodeName === "LI" &&
					family.parent.parentNode.childNodes.length === 1 &&
					!family.left.previousSilbing &&
					!family.right.nextSibling;
					
				if(coveringWholeList) {
					var ul = node.parentNode.parentNode;
					this.insertNodeAt(wrapper, ul, "before");
					wrapper.appendChild(ul);
				} else {
					while(node !== family.right) {
						next = node.nextSibling;
						wrapper.appendChild(node);
						node = next;
					}
					wrapper.appendChild(family.right);
				}
				applied.push(wrapper);
			} else {
				// is normal tagName
				var elements = this.getBlockElementsBetween(from, to);
				for(var i = 0; i < elements.length; i++) {
					if(this.tree.isBlockContainer(elements[i])) {
						var wrappers = this.wrapAllInlineOrTextNodesAs(tagName, elements[i], true);
						for(var j = 0; j < wrappers.length; j++) {
							applied.push(wrappers[j]);
						}
					} else {
						applied.push(this.replaceTag(tagName, elements[i]) || elements[i]);
					}
				}
			}
		}
		
		if(className) {
			var elements = this.tree.collectNodesBetween(from, to, function(n) {return n.nodeType == 1;});
			for(var i = 0; i < elements.length; i++) {
				elements[i].className = className;
			}
		}	
		
		return applied;
	},
	
	/**
	 * Moves block up or down
	 *
	 * @param {Element} block Target block
	 * @param {boolean} up Move up if true
	 * 
	 * @returns {Element} Moved block. It could be different with given block.
	 */
	moveBlock: function(block, up) {
		// if block is table cell or contained by table cell, select its row as mover
		block = this.getParentElementOf(block, ["TR"]) || block;
		
		// if block is only child, select its parent as mover
		while(block.nodeName !== "TR" && block.parentNode !== this.getRoot() && !block.previousSibling && !block.nextSibling && !this.tree.isListContainer(block.parentNode)) {
			block = block.parentNode;
		}
		
		// find target and where
		var target, where;
		if (up) {
			target = block.previousSibling;
			
			if(target) {
				var singleNodeLi = target.nodeName === 'LI' && ((target.childNodes.length === 1 && this.tree.isBlock(target.firstChild)) || !this.tree.hasBlocks(target));
				var table = ['TABLE', 'TR'].indexOf(target.nodeName) !== -1;

				where = this.tree.isBlockContainer(target) && !singleNodeLi && !table ? "end" : "before";
			} else if(block.parentNode !== this.getRoot()) {
				target = block.parentNode;
				where = "before";
			}
		} else {
			target = block.nextSibling;
			
			if(target) {
				var singleNodeLi = target.nodeName === 'LI' && ((target.childNodes.length === 1 && this.tree.isBlock(target.firstChild)) || !this.tree.hasBlocks(target));
				var table = ['TABLE', 'TR'].indexOf(target.nodeName) !== -1;
				
				where = this.tree.isBlockContainer(target) && !singleNodeLi && !table ? "start" : "after";
			} else if(block.parentNode !== this.getRoot()) {
				target = block.parentNode;
				where = "after";
			}
		}
		
		
		// no way to go?
		if(!target) return null;
		if(["TBODY", "THEAD"].indexOf(target.nodeName) !== -1) return null;
		
		// normalize
		this.wrapAllInlineOrTextNodesAs("P", target, true);
		
		// make placeholder if needed
		if(this.isFirstLiWithNestedList(block)) {
			this.insertNewBlockAround(block, false, "P");
		}
		
		// perform move
		var parent = block.parentNode;
		var moved = this.insertNodeAt(block, target, where, true);
		
		// cleanup
		if(!parent.hasChildNodes()) this.deleteNode(parent, true);
		this.unwrapUnnecessaryParagraph(moved);
		this.unwrapUnnecessaryParagraph(target);

		// remove placeholder
		if(up) {
			if(moved.previousSibling && this.isEmptyBlock(moved.previousSibling) && !moved.previousSibling.previousSibling && moved.parentNode.nodeName === "LI" && this.tree.isListContainer(moved.nextSibling)) {
				this.deleteNode(moved.previousSibling);
			}
		} else {
			if(moved.nextSibling && this.isEmptyBlock(moved.nextSibling) && !moved.previousSibling && moved.parentNode.nodeName === "LI" && this.tree.isListContainer(moved.nextSibling.nextSibling)) {
				this.deleteNode(moved.nextSibling);
			}
		}
		
		this.correctEmptyElement(moved);
		
		return moved;
	},
	
	/**
	 * Remove given block
	 *
	 * @param {Element} block Target block
	 * @returns {Element} Nearest block of remove element
	 */
	removeBlock: function(block) {
		var blockToMove;

		// if block is only child, select its parent as mover
		while(block.parentNode !== this.getRoot() && !block.previousSibling && !block.nextSibling && !this.tree.isListContainer(block.parentNode)) {
			block = block.parentNode;
		}
		
		var finder = function(node) {return this.tree.isBlock(node) && !this.tree.isAtomic(node) && !this.tree.isDescendantOf(block, node) && !this.tree.hasBlocks(node);}.bind(this);
		var exitCondition = function(node) {return this.tree.isBlock(node) && !this.tree.isDescendantOf(this.getRoot(), node)}.bind(this);
		
		if(this.isFirstLiWithNestedList(block)) {
			blockToMove = this.outdentListItem(block.nextSibling.firstChild);
			this.deleteNode(blockToMove.previousSibling, true);
		} else if(this.tree.isTableCell(block)) {
			var rtable = new xq.RichTable(this, this.getParentElementOf(block, ["TABLE"]));
			blockToMove = rtable.getBelowCellOf(block);
			
			// should not delete row when there's thead and the row is the only child of tbody
			if(
				block.parentNode.parentNode.nodeName === "TBODY" &&
				rtable.hasHeadingAtTop() &&
				rtable.getDom().tBodies[0].rows.length === 1) return blockToMove;
			
			blockToMove = blockToMove ||
				this.tree.findForward(block, finder, exitCondition) ||
				this.tree.findBackward(block, finder, exitCondition);
			
			this.deleteNode(block.parentNode, true);
		} else {
			blockToMove = blockToMove ||
				this.tree.findForward(block, finder, exitCondition) ||
				this.tree.findBackward(block, finder, exitCondition);
			
			if(!blockToMove) blockToMove = this.insertNodeAt(this.makeEmptyParagraph(), block, "after");
			
			this.deleteNode(block, true);
		}
		if(!this.getRoot().hasChildNodes()) {
			blockToMove = this.createElement("P");
			this.getRoot().appendChild(blockToMove);
			this.correctEmptyElement(blockToMove);
		}
		
		return blockToMove;
	},
	
	/**
	 * Removes trailing whitespaces of given block
	 *
	 * @param {Element} block Target block
	 */
	removeTrailingWhitespace: function(block) {throw "Not implemented"},
	
	/**
	 * Extract given list item out and change its container's tag
	 *
	 * @param {Element} element LI or P which is a child of LI
	 * @param {String} type "OL", "UL"
	 * @param {String} className CSS class name
	 *
	 * @returns {Element} changed element
	 */
	changeListTypeTo: function(element, type, className) {
		type = type.toUpperCase();
		className = className || "";
		
		var li = this.getParentElementOf(element, ["LI"]);
		if(!li) throw "IllegalArgumentException";
		
		var container = li.parentNode;

		this.splitContainerOf(li);
		
		var newContainer = this.insertNodeAt(this.createElement(type), container, "before");
		if(className) newContainer.className = className;
		
		this.insertNodeAt(li, newContainer, "start");
		this.deleteNode(container);
		
		this.mergeAdjustLists(newContainer);
		
		return element;
	},
	
	/**
	 * Split container of element into (maxium) three pieces.
	 */
	splitContainerOf: function(element, preserveElementItself, dir) {
		if([element, element.parentNode].indexOf(this.getRoot()) !== -1) return element;

		var container = element.parentNode;
		if(element.previousSibling && (!dir || dir.toLowerCase() === "prev")) {
			var prev = this.createElement(container.nodeName);
			this.copyAttributes(container, prev);
			while(container.firstChild !== element) {
				prev.appendChild(container.firstChild);
			}
			this.insertNodeAt(prev, container, "before");
			this.unwrapUnnecessaryParagraph(prev);
		}
		
		if(element.nextSibling && (!dir || dir.toLowerCase() === "next")) {
			var next = this.createElement(container.nodeName);
			this.copyAttributes(container, next);
			while(container.lastChild !== element) {
				this.insertNodeAt(container.lastChild, next, "start");
			}
			this.insertNodeAt(next, container, "after");
			this.unwrapUnnecessaryParagraph(next);
		}
		
		if(!preserveElementItself) element = this.unwrapUnnecessaryParagraph(container) ? container : element;
		return element;
	},

	/**
	 * TODO: Add specs
	 */
	splitParentElement: function(seperator) {
		var parent = seperator.parentNode;
		if(["HTML", "HEAD", "BODY"].indexOf(parent.nodeName) !== -1) throw "Illegal argument. Cannot seperate element[" + parent.nodeName + "]";

		var previousSibling = seperator.previousSibling;
		var nextSibling = seperator.nextSibling;
		
		var newElement = this.insertNodeAt(this.createElement(parent.nodeName), parent, "after");
		
		var next;
		while(next = seperator.nextSibling) newElement.appendChild(next);
		
		this.insertNodeAt(seperator, newElement, "start");
		this.copyAttributes(parent, newElement);
		
		return newElement;
	},
	
	/**
	 * TODO: Add specs
	 */
	splitElementUpto: function(seperator, element, excludeElement) {
		while(seperator.previousSibling !== element) {
			if(excludeElement && seperator.parentNode === element) break;
			seperator = this.splitParentElement(seperator);
		}
		return seperator;
	},
	
	/**
	 * Merges two adjust elements
	 *
	 * @param {Element} element base element
	 * @param {boolean} withNext merge base element with next sibling
	 * @param {boolean} skip skip merge steps
	 */
	mergeElement: function(element, withNext, skip) {
		this.wrapAllInlineOrTextNodesAs("P", element.parentNode, true);
		
		// find two block
		if(withNext) {
			var prev = element;
			var next = this.tree.findForward(
				element,
				function(node) {return this.tree.isBlock(node) && !this.tree.isListContainer(node) && node !== element.parentNode}.bind(this)
			);
		} else {
			var next = element;
			var prev = this.tree.findBackward(
				element,
				function(node) {return this.tree.isBlock(node) && !this.tree.isListContainer(node) && node !== element.parentNode}.bind(this)
			);
		}
		
		// normalize next block
		if(next && this.tree.isDescendantOf(this.getRoot(), next)) {
			var nextContainer = next.parentNode;
			if(this.tree.isBlockContainer(next)) {
				nextContainer = next;
				this.wrapAllInlineOrTextNodesAs("P", nextContainer, true);
				next = nextContainer.firstChild;
			}
		} else {
			next = null;
		}
		
		// normalize prev block
		if(prev && this.tree.isDescendantOf(this.getRoot(), prev)) {
			var prevContainer = prev.parentNode;
			if(this.tree.isBlockContainer(prev)) {
				prevContainer = prev;
				this.wrapAllInlineOrTextNodesAs("P", prevContainer, true);
				prev = prevContainer.lastChild;
			}
		} else {
			prev = null;
		}
		
		try {
			var containersAreTableCell =
				prevContainer && (this.tree.isTableCell(prevContainer) || ['TR', 'THEAD', 'TBODY'].indexOf(prevContainer.nodeName) !== -1) &&
				nextContainer && (this.tree.isTableCell(nextContainer) || ['TR', 'THEAD', 'TBODY'].indexOf(nextContainer.nodeName) !== -1);
			
			if(containersAreTableCell && prevContainer !== nextContainer) return null;
			
			// if next has margin, perform outdent
			if((!skip || !prev) && next && nextContainer.nodeName !== "LI" && this.outdentElement(next)) return element;

			// nextContainer is first li and next of it is list container ([I] represents caret position):
			//
			// * A[I]
			// * B
			//   * C
			if(nextContainer && nextContainer.nodeName === 'LI' && this.tree.isListContainer(next.nextSibling)) {
				// move child nodes and...
				this.moveChildNodes(nextContainer, prevContainer);
				
				// merge two paragraphs
				this.removePlaceHoldersAndEmptyNodes(prev);
				this.moveChildNodes(next, prev);
				this.deleteNode(next);
				
				return prev;
			}
			
			// merge two list containers
			if(nextContainer && nextContainer.nodeName === 'LI' && this.tree.isListContainer(nextContainer.parentNode.previousSibling)) {
				this.mergeAdjustLists(nextContainer.parentNode.previousSibling, true, "next");
				return prev;
			}

			if(next && !containersAreTableCell && prevContainer && prevContainer.nodeName === 'LI' && nextContainer && nextContainer.nodeName === 'LI' && prevContainer.parentNode.nextSibling === nextContainer.parentNode) {
				var nextContainerContainer = nextContainer.parentNode;
				this.moveChildNodes(nextContainer.parentNode, prevContainer.parentNode);
				this.deleteNode(nextContainerContainer);
				return prev;
			}
			
			// merge two containers
			if(next && !containersAreTableCell && prevContainer && prevContainer.nextSibling === nextContainer && ((skip && prevContainer.nodeName !== "LI") || (!skip && prevContainer.nodeName === "LI"))) {
				this.moveChildNodes(nextContainer, prevContainer);
				return prev;
			}

			// unwrap container
			if(nextContainer && nextContainer.nodeName !== "LI" && !this.getParentElementOf(nextContainer, ["TABLE"]) && !this.tree.isListContainer(nextContainer) && nextContainer !== this.getRoot() && !next.previousSibling) {
				return this.unwrapElement(nextContainer, true);
			}
			
			// delete table
			if(withNext && nextContainer && nextContainer.nodeName === "TABLE") {
				this.deleteNode(nextContainer, true);
				return prev;
			} else if(!withNext && prevContainer && this.tree.isTableCell(prevContainer) && !this.tree.isTableCell(nextContainer)) {
				this.deleteNode(this.getParentElementOf(prevContainer, ["TABLE"]), true);
				return next;
			}
			
			// if prev is same with next, do nothing
			if(prev === next) return null;

			// if there is a null block, do nothing
			if(!prev || !next || !prevContainer || !nextContainer) return null;
			
			// if two blocks are not in the same table cell, do nothing
			if(this.getParentElementOf(prev, ["TD", "TH"]) !== this.getParentElementOf(next, ["TD", "TH"])) return null;
			
			var prevIsEmpty = false;
			
			// cleanup empty block before merge

			// 1. cleanup prev node which ends with marker + &nbsp;
			if(
				xq.Browser.isTrident &&
				prev.childNodes.length >= 2 &&
				this.isMarker(prev.lastChild.previousSibling) &&
				prev.lastChild.nodeType === 3 &&
				prev.lastChild.nodeValue.length === 1 &&
				prev.lastChild.nodeValue.charCodeAt(0) === 160
			) {
				this.deleteNode(prev.lastChild);
			}

			// 2. cleanup prev node (if prev is empty, then replace prev's tag with next's)
			this.removePlaceHoldersAndEmptyNodes(prev);
			if(this.isEmptyBlock(prev)) {
				// replace atomic block with normal block so that following code don't need to care about atomic block
				if(this.tree.isAtomic(prev)) prev = this.replaceTag("P", prev);
				
				prev = this.replaceTag(next.nodeName, prev) || prev;
				prev.innerHTML = "";
			} else if(prev.firstChild === prev.lastChild && this.isMarker(prev.firstChild)) {
				prev = this.replaceTag(next.nodeName, prev) || prev;
			}
			
			// 3. cleanup next node
			if(this.isEmptyBlock(next)) {
				// replace atomic block with normal block so that following code don't need to care about atomic block
				if(this.tree.isAtomic(next)) next = this.replaceTag("P", next);
				
				next.innerHTML = "";
			}
			
			// perform merge
			this.moveChildNodes(next, prev);
			this.deleteNode(next);
			return prev;
		} finally {
			// cleanup
			if(prevContainer && this.isEmptyBlock(prevContainer)) this.deleteNode(prevContainer, true);
			if(nextContainer && this.isEmptyBlock(nextContainer)) this.deleteNode(nextContainer, true);
			
			if(prevContainer) this.unwrapUnnecessaryParagraph(prevContainer);
			if(nextContainer) this.unwrapUnnecessaryParagraph(nextContainer);
		}
	},
	
	/**
	 * Merges adjust list containers which has same tag name
	 *
	 * @param {Element} container target list container
	 * @param {boolean} force force adjust list container even if they have different list type
	 * @param {String} dir Specify merge direction: PREV or NEXT. If not supplied it will be merged with both direction.
	 */
	mergeAdjustLists: function(container, force, dir) {
		var prev = container.previousSibling;
		var isPrevSame = prev && (prev.nodeName === container.nodeName && prev.className === container.className);
		if((!dir || dir.toLowerCase() === 'prev') && (isPrevSame || (force && this.tree.isListContainer(prev)))) {
			while(prev.lastChild) {
				this.insertNodeAt(prev.lastChild, container, "start");
			}
			this.deleteNode(prev);
		}
		
		var next = container.nextSibling;
		var isNextSame = next && (next.nodeName === container.nodeName && next.className === container.className);
		if((!dir || dir.toLowerCase() === 'next') && (isNextSame || (force && this.tree.isListContainer(next)))) {
			while(next.firstChild) {
				this.insertNodeAt(next.firstChild, container, "end");
			}
			this.deleteNode(next);
		}
	},
	
	/**
	 * Moves child nodes from one element into another.
	 *
	 * @param {Elemet} from source element
	 * @param {Elemet} to target element
	 */
	moveChildNodes: function(from, to) {
		if(this.tree.isDescendantOf(from, to) || ["HTML", "HEAD"].indexOf(to.nodeName) !== -1)
			throw "Illegal argument. Cannot move children of element[" + from.nodeName + "] to element[" + to.nodeName + "]";
		
		if(from === to) return;
		
		while(from.firstChild) to.appendChild(from.firstChild);
	},
	
	/**
	 * Copies attributes from one element into another.
	 *
	 * @param {Element} from source element
	 * @param {Element} to target element
	 * @param {boolean} copyId copy ID attribute of source element
	 */
	copyAttributes: function(from, to, copyId) {
		// IE overrides this
		
		var attrs = from.attributes;
		if(!attrs) return;
		
		for(var i = 0; i < attrs.length; i++) {
			if(attrs[i].nodeName === "class" && attrs[i].nodeValue) {
				to.className = attrs[i].nodeValue;
			} else if((copyId || "id" !== attrs[i].nodeName) && attrs[i].nodeValue) {
				to.setAttribute(attrs[i].nodeName, attrs[i].nodeValue);
			}
		}
	},

	_indentElements: function(node, blocks, affect) {
		for (var i=0; i < affect.length; i++) {
			if (affect[i] === node || this.tree.isDescendantOf(affect[i], node))
				return;
		}
		leaves = this.tree.getLeavesAtEdge(node);
		
		if (blocks.includeElement(leaves[0])) {
			var affected = this.indentElement(node, true);
			if (affected) {
				affect.push(affected);
				return;
			}
		}
		
		if (blocks.includeElement(node)) {
			var affected = this.indentElement(node, true);
			if (affected) {
				affect.push(affected);
				return;
			}
		}

		var children=xq.$A(node.childNodes);
		for (var i=0; i < children.length; i++)
			this._indentElements(children[i], blocks, affect);
		return;
	},

	indentElements: function(from, to) {
		var blocks = this.getBlockElementsBetween(from, to);
		var top = this.tree.findCommonAncestorAndImmediateChildrenOf(from, to);
		
		var affect = [];
		
		leaves = this.tree.getLeavesAtEdge(top.parent);
		if (blocks.includeElement(leaves[0])) {
			var affected = this.indentElement(top.parent);
			if (affected)
				return [affected];
		}
		
		var children = xq.$A(top.parent.childNodes);
		for (var i=0; i < children.length; i++) {
			this._indentElements(children[i], blocks, affect);
		}
		
		affect = affect.flatten()
		return affect.length > 0 ? affect : blocks;
	},
	
	outdentElementsCode: function(node) {
		if (node.tagName === 'LI')
			node = node.parentNode;
		if (node.tagName === 'OL' && node.className === 'code')
			return true;
		return false;
	},
	
	_outdentElements: function(node, blocks, affect) {
		for (var i=0; i < affect.length; i++) {
			if (affect[i] === node || this.tree.isDescendantOf(affect[i], node))
				return;
		}
		leaves = this.tree.getLeavesAtEdge(node);
		
		if (blocks.includeElement(leaves[0]) && !this.outdentElementsCode(leaves[0])) {
			var affected = this.outdentElement(node, true);
			if (affected) {
				affect.push(affected);
				return;
			}
		}
		
		if (blocks.includeElement(node)) {
			var children = xq.$A(node.parentNode.childNodes);
			var isCode = this.outdentElementsCode(node);
			var affected = this.outdentElement(node, true, isCode);
			if (affected) {
				if (children.includeElement(affected) && this.tree.isListContainer(node.parentNode) && !isCode) {
					for (var i=0; i < children.length; i++) {
						if (blocks.includeElement(children[i]) && !affect.includeElement(children[i]))
							affect.push(children[i]);
					}
				}else
					affect.push(affected);
				return;
			}
		}

		var children=xq.$A(node.childNodes);
		for (var i=0; i < children.length; i++)
			this._outdentElements(children[i], blocks, affect);
		return;
	},

	outdentElements: function(from, to) {
		var start, end;
		
		if (from.parentNode.tagName === 'LI') start=from.parentNode;
		if (to.parentNode.tagName === 'LI') end=to.parentNode;
		
		var blocks = this.getBlockElementsBetween(from, to);
		var top = this.tree.findCommonAncestorAndImmediateChildrenOf(from, to);
		
		var affect = [];
		
		leaves = this.tree.getLeavesAtEdge(top.parent);
		if (blocks.includeElement(leaves[0]) && !this.outdentElementsCode(top.parent)) {
			var affected = this.outdentElement(top.parent);
			if (affected)
				return [affected];
		}
		
		var children = xq.$A(top.parent.childNodes);
		for (var i=0; i < children.length; i++) {
			this._outdentElements(children[i], blocks, affect);
		}

		if (from.offsetParent && to.offsetParent) {
			start = from;
			end = to;
		}else if (blocks.first().offsetParent && blocks.last().offsetParent) {
			start = blocks.first();
			end = blocks.last();
		}
		
		affect = affect.flatten()
		if (!start || !start.offsetParent)
			start = affect.first();
		if (!end || !end.offsetParent)
			end = affect.last();
		
		return this.getBlockElementsBetween(start, end);
	},
	
	/**
	 * Performs indent by increasing element's margin-left
	 */	
	indentElement: function(element, noParent, forceMargin) {
		if(
			!forceMargin &&
			(element.nodeName === "LI" || (!this.tree.isListContainer(element) && !element.previousSibling && element.parentNode.nodeName === "LI"))
		) return this.indentListItem(element, noParent);
		
		var root = this.getRoot();
		if(!element || element === root) return null;
		
		if (element.parentNode !== root && !element.previousSibling && !noParent) element=element.parentNode;
		
		var margin = element.style.marginLeft;
		var cssValue = margin ? this._getCssValue(margin, "px") : {value:0, unit:"em"};
		
		cssValue.value += 2;
		element.style.marginLeft = cssValue.value + cssValue.unit;
		
		return element;
	},
	
	/**
	 * Performs outdent by decreasing element's margin-left
	 */	
	outdentElement: function(element, noParent, forceMargin) {
		if(!forceMargin && element.nodeName === "LI") return this.outdentListItem(element, noParent);
		
		var root = this.getRoot();
		if(!element || element === root) return null;
		
		var margin = element.style.marginLeft;
		
		var cssValue = margin ? this._getCssValue(margin, "px") : {value:0, unit:"em"};
		if(cssValue.value === 0) {
			return element.previousSibling || forceMargin ?
				null :
				this.outdentElement(element.parentNode, noParent);
		}
		
		cssValue.value -= 2;
		element.style.marginLeft = cssValue.value <= 0 ? "" : cssValue.value + cssValue.unit;
		if(element.style.cssText === "") element.removeAttribute("style");
		
		return element;
	},
	
	/**
	 * Performs indent for list item
	 */
	indentListItem: function(element, treatListAsNormalBlock) {
		var li = this.getParentElementOf(element, ["LI"]);
		var container = li.parentNode;
		var prev = li.previousSibling;
		if(!li.previousSibling) return this.indentElement(container);
		
		if(li.parentNode.nodeName === "OL" && li.parentNode.className === "code") return this.indentElement(li, treatListAsNormalBlock, true);
		
		if(!prev.lastChild) prev.appendChild(this.makePlaceHolder());
		
		var targetContainer = 
			this.tree.isListContainer(prev.lastChild) ?
			// if there's existing list container, select it as target container
			prev.lastChild :
			// if there's nothing, create new one
			this.insertNodeAt(this.createElement(container.nodeName), prev, "end");
		
		this.wrapAllInlineOrTextNodesAs("P", prev, true);
		
		// perform move
		targetContainer.appendChild(li);
		
		// flatten nested list
		if(!treatListAsNormalBlock && li.lastChild && this.tree.isListContainer(li.lastChild)) {
			var childrenContainer = li.lastChild;
			var child;
			while(child = childrenContainer.lastChild) {
				this.insertNodeAt(child, li, "after");
			}
			this.deleteNode(childrenContainer);
		}
		
		this.unwrapUnnecessaryParagraph(li);
		
		return li;
	},
	
	/**
	 * Performs outdent for list item
	 *
	 * @return {Element} outdented list item or null if no outdent performed
	 */
	outdentListItem: function(element, treatListAsNormalBlock) {
		var li = this.getParentElementOf(element, ["LI"]);
		var container = li.parentNode;

		if(!li.previousSibling) {
			var performed = this.outdentElement(container);
			if(performed) return performed;
		}

		if(li.parentNode.nodeName === "OL" && li.parentNode.className === "code") return this.outdentElement(li, treatListAsNormalBlock, true);
		
		var parentLi = container.parentNode;
		if(parentLi.nodeName !== "LI") return null;
		
		if(treatListAsNormalBlock) {
			while(container.lastChild !== li) {
				this.insertNodeAt(container.lastChild, parentLi, "after");
			}
		} else {
			// make next siblings as children
			if(li.nextSibling) {
				var targetContainer =
					li.lastChild && this.tree.isListContainer(li.lastChild) ?
						// if there's existing list container, select it as target container
						li.lastChild :
						// if there's nothing, create new one
						this.insertNodeAt(this.createElement(container.nodeName), li, "end");
				
				this.copyAttributes(container, targetContainer);
				
				var sibling;
				while(sibling = li.nextSibling) {
					targetContainer.appendChild(sibling);
				}
			}
		}
		
		// move current LI into parent LI's next sibling
		li = this.insertNodeAt(li, parentLi, "after");
		
		// remove empty container
		if(container.childNodes.length === 0) this.deleteNode(container);
		
		if(li.firstChild && this.tree.isListContainer(li.firstChild)) {
			this.insertNodeAt(this.makePlaceHolder(), li, "start");
		}
		
		this.wrapAllInlineOrTextNodesAs("P", li);
		this.unwrapUnnecessaryParagraph(parentLi);
		
		return li;
	},
	
	/**
	 * Performs justification
	 *
	 * @param {Element} block target element
	 * @param {String} dir one of "LEFT", "CENTER", "RIGHT", "BOTH"
	 */
	justifyBlock: function(block, dir) {
		// if block is only child, select its parent as mover
		while(block.parentNode !== this.getRoot() && !block.previousSibling && !block.nextSibling && !this.tree.isListContainer(block.parentNode)) {
			block = block.parentNode;
		}
		
		var styleValue = dir.toLowerCase() === "both" ? "justify" : dir;
		if(styleValue === "left") {
			block.style.textAlign = "";
			if(block.style.cssText === "") block.removeAttribute("style");
		} else {
			block.style.textAlign = styleValue;
		}
		return block;
	},
	
	justifyBlocks: function(blocks, dir) {
		for(var i = 0; i < blocks.length; i++) {
			this.justifyBlock(blocks[i], dir);
		}
		return blocks;
	},
	
	/**
     * Turn given element into list. If the element is a list already, it will be reversed into normal element.
	 *
	 * @param {Element} element target element
	 * @param {String} type one of "UL", "OL"
	 * @param {String} className CSS className
	 * @returns {Element} affected element
	 */
	applyList: function(element, type, className) {
		type = type.toUpperCase();
		className = className || "";
		
		var containerTag = type;
		
		if(element.nodeName === "LI" || (element.parentNode.nodeName === "LI" && !element.previousSibling)) {
			var element = this.getParentElementOf(element, ["LI"]);
			var container = element.parentNode;
			if(container.nodeName === containerTag && container.className === className) {
				return this.extractOutElementFromParent(element);
			} else {
				return this.changeListTypeTo(element, type, className);
			}
		} else {
			return this.turnElementIntoListItem(element, type, className);
		}
	},
	
	applyLists: function(from, to, type, className) {
		type = type.toUpperCase();
		className = className || "";

		var containerTag = type;
		var blocks = this.getBlockElementsBetween(from, to);
		
		// LIs or Non-containing blocks
		var whole = blocks.findAll(function(e) {
			return e.nodeName === "LI" || !this.tree.isBlockContainer(e);
		}.bind(this));
		
		// LIs
		var listItems = whole.findAll(function(e) {return e.nodeName === "LI"}.bind(this));
		
		// Non-containing blocks which is not a descendant of any LIs selected above(listItems).
		var normalBlocks = whole.findAll(function(e) {
			return e.nodeName !== "LI" &&
				!(e.parentNode.nodeName === "LI" && !e.previousSibling && !e.nextSibling) &&
				!this.tree.isDescendantOf(listItems, e)
		}.bind(this));
		
		var diffListItems = listItems.findAll(function(e) {
			return e.parentNode.nodeName !== containerTag;
		}.bind(this));
		
		// Conditions needed to determine mode
		var hasNormalBlocks = normalBlocks.length > 0;
		var hasDifferentListStyle = diffListItems.length > 0;
		
		var blockToHandle = null;
		
		if(hasNormalBlocks) {
			blockToHandle = normalBlocks;
		} else if(hasDifferentListStyle) {
			blockToHandle = diffListItems;
		} else {
			blockToHandle = listItems;
		}
		
		// perform operation
		for(var i = 0; i < blockToHandle.length; i++) {
			var block = blockToHandle[i];
			
			// preserve original index to restore selection
			var originalIndex = blocks.indexOf(block);
			blocks[originalIndex] = this.applyList(block, type, className);
		}
		
		return blocks;
	},

	/**
	 * Insert place-holder for given empty element. Empty element does not displayed and causes many editing problems.
	 *
	 * @param {Element} element empty element
	 */
	correctEmptyElement: function(element) {throw "Not implemented"},

	/**
	 * Corrects current block-only-container to do not take any non-block element or node.
	 */
	correctParagraph: function() {throw "Not implemented"},
	
	/**
	 * Makes place-holder for empty element.
	 *
	 * @returns {Node} Platform specific place holder
	 */
	makePlaceHolder: function() {throw "Not implemented"},
	
	/**
	 * Makes place-holder string.
	 *
	 * @returns {String} Platform specific place holder string
	 */
	makePlaceHolderString: function() {throw "Not implemented"},
	
	/**
	 * Makes empty paragraph which contains only one place-holder
	 */
	makeEmptyParagraph: function() {throw "Not implemented"},

	/**
	 * Applies background color to selected area
	 *
	 * @param {Object} color valid CSS color value
	 */
	applyBackgroundColor: function(color) {throw "Not implemented";},

	/**
	 * Applies foreground color to selected area
	 *
	 * @param {Object} color valid CSS color value
	 */
	applyForegroundColor: function(color) {
		this.execCommand("forecolor", color);
	},
	
	/**
	 * Applies font face to selected area
	 *
	 * @param {String} face font face
	 */
	applyFontFace: function(face) {
		this.execCommand("fontname", face);
	},
	
	/**
	 * Applies font size to selected area
	 *
	 * @param {Number} size font size (px)
	 */
	applyFontSize: function(size) {
		this.execCommand("fontsize", size);
	},
	
	execCommand: function(commandId, param) {throw "Not implemented";},
	
	applyRemoveFormat: function() {throw "Not implemented";},
	applyEmphasis: function() {throw "Not implemented";},
	applyStrongEmphasis: function() {throw "Not implemented";},
	applyStrike: function() {throw "Not implemented";},
	applyUnderline: function() {throw "Not implemented";},
	applySuperscription: function() {
		this.execCommand("superscript");
	},
	applySubscription: function() {
		this.execCommand("subscript");
	},
	indentBlock: function(element, treatListAsNormalBlock) {
		return (!element.previousSibling && element.parentNode.nodeName === "LI") ?
			this.indentListItem(element, treatListAsNormalBlock) :
			this.indentElement(element);
	},
	outdentBlock: function(element, treatListAsNormalBlock) {
		while(true) {
			if(!element.previousSibling && element.parentNode.nodeName === "LI") {
				element = this.outdentListItem(element, treatListAsNormalBlock);
				return element;
			} else {
				var performed = this.outdentElement(element);
				if(performed) return performed;
				
				// first-child can outdent container
				if(!element.previousSibling) {
					element = element.parentNode;
				} else {
					break;
				}
			}
		}
		
		return null;
	},
	wrapBlock: function(tag, start, end) {
		if(this.tree._blockTags.indexOf(tag) === -1) throw "Unsuppored block container: [" + tag + "]";
		if(!start) start = this.getCurrentBlockElement();
		if(!end) end = start;
		
		// Check if the selection captures valid fragement
		var validFragment = false;
		
		if(start === end) {
			// are they same block?
			validFragment = true;
		} else if(start.parentNode === end.parentNode && !start.previousSibling && !end.nextSibling) {
			// are they covering whole parent?
			validFragment = true;
			start = end = start.parentNode;
		} else {
			// are they siblings of non-LI blocks?
			validFragment =
				(start.parentNode === end.parentNode) &&
				(start.nodeName !== "LI");
		}
		
		if(!validFragment) return null;
		
		var wrapper = this.createElement(tag);
		
		if(start === end) {
			// They are same.
			if(this.tree.isBlockContainer(start) && !this.tree.isListContainer(start)) {
				// It's a block container. Wrap its contents.
				if(this.tree.isBlockOnlyContainer(wrapper)) {
					this.correctEmptyElement(start);
					this.wrapAllInlineOrTextNodesAs("P", start, true);
				}
				this.moveChildNodes(start, wrapper);
				start.appendChild(wrapper);
			} else {
				// It's not a block container. Wrap itself.
				wrapper = this.insertNodeAt(wrapper, start, "after");
				wrapper.appendChild(start);
			}
			
			this.correctEmptyElement(wrapper);
		} else {
			// They are siblings. Wrap'em all.
			wrapper = this.insertNodeAt(wrapper, start, "before");
			var node = start;
			
			while(node !== end) {
				next = node.nextSibling;
				wrapper.appendChild(node);
				node = next;
			}
			wrapper.appendChild(node);
		}
		
		return wrapper;
	},


	
	/////////////////////////////////////////////
	// Focus/Caret/Selection
	
	/**
	 * Gives focus to root element's window
	 */
	focus: function() {throw "Not implemented";},

	/**
	 * Returns selection object
	 */
	sel: function() {throw "Not implemented";},
	
	/**
	 * Returns range object
	 */
	rng: function() {throw "Not implemented";},
	
	/**
	 * Returns true if DOM has selection
	 */
	hasSelection: function() {throw "Not implemented";},

	/**
	 * Returns true if root element's window has selection
	 */
	hasFocus: function() {
		return this.focused;
	},
	
	/**
	 * Adjust scrollbar to make the element visible in current viewport.
	 *
	 * @param {Element} element Target element
	 * @param {boolean} toTop Align element to top of the viewport
	 * @param {boolean} moveCaret Move caret to the element
	 */
	scrollIntoView: function(element, toTop, moveCaret) {
		element.scrollIntoView(toTop);
		if(moveCaret) this.placeCaretAtStartOf(element);
	},
	
	/**
	 * Select all document
	 */
	selectAll: function() {
		return this.execCommand('selectall');
	},
	
	/**
	 * Select specified element.
	 *
	 * @param {Element} element element to select
	 * @param {boolean} entireElement true to select entire element, false to select inner content of element 
	 */
	selectElement: function(node, entireElement) {throw "Not implemented"},
	
	/**
	 * Select all elements between two blocks(inclusive).
	 *
	 * @param {Element} start start of selection
	 * @param {Element} end end of selection
	 */
	selectBlocksBetween: function(start, end) {throw "Not implemented"},
	
	/**
	 * Delete selected area
	 */
	deleteSelection: function() {throw "Not implemented"},
	
	/**
	 * Collapses current selection.
	 *
	 * @param {boolean} toStart true to move caret to start of selected area.
	 */
	collapseSelection: function(toStart) {throw "Not implemented"},
	
	/**
	 * Returns selected area as HTML string
	 */
	getSelectionAsHtml: function() {throw "Not implemented"},
	
	/**
	 * Returns selected area as text string
	 */
	getSelectionAsText: function() {throw "Not implemented"},
	
	/**
	 * Places caret at start of the element
	 *
	 * @param {Element} element Target element
	 */
	placeCaretAtStartOf: function(element) {throw "Not implemented"},

	
	/**
	 * Checks if the caret is place at start of the block
	 */
	isCaretAtBlockStart: function() {
		if(this.isCaretAtEmptyBlock()) return true;
		if(this.hasSelection()) return false;
		var node = this.getCurrentBlockElement();
		var marker = this.pushMarker();
		
		var isTrue = false;
		while (node = this.getFirstChild(node)) {
			if (node === marker) {
				isTrue = true;
				break;
			}
		}
		
		this.popMarker();
		
		return isTrue;
	},
	
	/**
	 * Checks if the caret is place at end of the block
	 */
	isCaretAtBlockEnd: function() {throw "Not implemented"},
	
	/**
	 * Checks if the node is empty-text-node or not
	 */
	isEmptyTextNode: function(node) {
		return node.nodeType === 3 && (node.nodeValue.length === 0 || (node.nodeValue.length === 1 && (node.nodeValue.charAt(0) === 32 || node.nodeValue.charAt(0) === 160)));
	},
	
	/**
	 * Checks if the caret is place in empty block element
	 */
	isCaretAtEmptyBlock: function() {
		return this.isEmptyBlock(this.getCurrentBlockElement());
	},
	
	/**
	 * Saves current selection info
	 *
	 * @returns {Object} Bookmark for selection
	 */
	saveSelection: function() {throw "Not implemented"},
	
	/**
	 * Restores current selection info
	 *
	 * @param {Object} bookmark Bookmark
	 */
	restoreSelection: function(bookmark) {throw "Not implemented"},
	
	/**
	 * Create marker
	 */
	createMarker: function() {
		var marker = this.createElement("SPAN");
		marker.id = "xquared_marker_" + (this._lastMarkerId++);
		marker.className = "xquared_marker";
		return marker;
	},

	/**
	 * Create and insert marker into current caret position.
	 * Marker is an inline element which has no child nodes. It can be used with many purposes.
	 * For example, You can push marker to mark current caret position.
	 *
	 * @returns {Element} marker
	 */
	pushMarker: function() {
		var marker = this.createMarker();
		return this.insertNode(marker);
	},
	
	/**
	 * Removes last marker
	 *
	 * @params {boolean} moveCaret move caret into marker before delete.
	 */
	popMarker: function(moveCaret) {
		var id = "xquared_marker_" + (--this._lastMarkerId);
		var marker = this.$(id);
		if(!marker) return;
		
		if(moveCaret) {
			this.selectElement(marker, true);
			this.collapseSelection(false);
		}
		
		this.deleteNode(marker);
	},
	
	
	
	/////////////////////////////////////////////
	// Query methods
	
	isMarker: function(node) {
		return (node.nodeType === 1 && node.nodeName === "SPAN" && node.className === "xquared_marker");
	},
	
	isFirstBlockOfBody: function(block) {
		var root = this.getRoot();
		if(this.isFirstLiWithNestedList(block)) block = block.parentNode;
		
		var found = this.tree.findBackward(
			block,
			function(node) {
				return node === root || (this.tree.isBlock(node) && !this.tree.isBlockOnlyContainer(node));
			}.bind(this)
		);
		
		return found === root;
	},
	
	/**
	 * Returns outer HTML of given element
	 */
	getOuterHTML: function(element) {throw "Not implemented"},
	
	/**
	 * Returns inner text of given element
	 * 
	 * @param {Element} element Target element
	 * @returns {String} Text string
	 */
	getInnerText: function(element) {
		return element.innerHTML.stripTags();
	},
	
	/**
	 * Checks if given node is place holder or not.
	 * 
	 * @param {Node} node DOM node
	 */
	isPlaceHolder: function(node) {throw "Not implemented"},
	
	/**
	 * Checks if given block is the first LI whose next sibling is a nested list.
	 *
	 * @param {Element} block Target block
	 */
	isFirstLiWithNestedList: function(block) {
		return !block.previousSibling &&
			block.parentNode.nodeName === "LI" &&
			this.tree.isListContainer(block.nextSibling);
	},
	
	/**
	 * Search all links within given element
	 *
	 * @param {Element} [element] Container element. If not given, the root element will be used.
	 * @param {Array} [found] if passed, links will be appended into this array.
	 * @returns {Array} Array of anchors. It returns empty array if there's no links.
	 */
	searchAnchors: function(element, found) {
		if(!element) element = this.getRoot();
		if(!found) found = [];

		var anchors = element.getElementsByTagName("A");
		for(var i = 0; i < anchors.length; i++) {
			found.push(anchors[i]);
		}

		return found;
	},
	
	/**
	 * Search all headings within given element
	 *
	 * @param {Element} [element] Container element. If not given, the root element will be used.
	 * @param {Array} [found] if passed, headings will be appended into this array.
	 * @returns {Array} Array of headings. It returns empty array if there's no headings.
	 */
	searchHeadings: function(element, found) {
		if(!element) element = this.getRoot();
		if(!found) found = [];

		var regexp = /^h[1-6]/ig;
		var nodes = element.childNodes;
		if (!nodes) return [];
		
		for(var i = 0; i < nodes.length; i++) {
			var isContainer = nodes[i] && this.tree._blockContainerTags.indexOf(nodes[i].nodeName) !== -1;
			var isHeading = nodes[i] && nodes[i].nodeName.match(regexp);

			if (isContainer) {
				this.searchHeadings(nodes[i], found);
			} else if (isHeading) {
				found.push(nodes[i]);
			}
		}

		return found;
	},
	
	/**
	 * Collect structure and style informations of given element.
	 *
	 * @param {Element} element target element
	 * @returns {Object} object that contains information: {em: true, strong: false, block: "p", list: "ol", ...}
	 */
	collectStructureAndStyle: function(element) {
		if(!element || element.nodeName === "#document") return {};

		var block = this.getParentBlockElementOf(element);
		
		if(block === null || (xq.Browser.isTrident && ["ready", "complete"].indexOf(block.readyState) === -1)) return {};
		
		var parents = this.tree.collectParentsOf(element, true, function(node) {return block.parentNode === node});
		var blockName = block.nodeName;

		var info = {};
		var doc = this.getDoc();
		var em = doc.queryCommandState("Italic");
		var strong = doc.queryCommandState("Bold");
		var strike = doc.queryCommandState("Strikethrough");
		var underline = doc.queryCommandState("Underline") && !this.getParentElementOf(element, ["A"]);
		var superscription = doc.queryCommandState("superscript");
		var subscription = doc.queryCommandState("subscript");
		var foregroundColor = doc.queryCommandValue("forecolor");
		var fontName = doc.queryCommandValue("fontname");
		var fontSize = doc.queryCommandValue("fontsize");
		// @WORKAROUND: Trident's fontSize value is affected by CSS
		if(xq.Browser.isTrident && fontSize === "5" && this.getParentElementOf(element, ["H1", "H2", "H3", "H4", "H5", "H6"])) fontSize = "";
		
		// @TODO: remove conditional
		var backgroundColor;
		if(xq.Browser.isGecko) {
			this.execCommand("styleWithCSS", "true");
			try {
				backgroundColor = doc.queryCommandValue("hilitecolor");
			} catch(e) {
				// if there's selection and the first element of the selection is
				// an empty block...
				backgroundColor = "";
			}
			this.execCommand("styleWithCSS", "false");
		} else {
			backgroundColor = doc.queryCommandValue("backcolor");
		}
		
		// if block is only child, select its parent
		while(block.parentNode && block.parentNode !== this.getRoot() && !block.previousSibling && !block.nextSibling && !this.tree.isListContainer(block.parentNode)) {
			block = block.parentNode;
		}

		var list = false;
		if(block.nodeName === "LI") {
			var parent = block.parentNode;
			var isCode = parent.nodeName === "OL" && parent.className === "code";
			var hasClass = parent.className.length > 0;
			if(isCode) {
				list = "CODE";
			} else if(hasClass) {
				list = false;
			} else {
				list = parent.nodeName;
			}
		}
		
		var justification = block.style.textAlign || "left";
		
		return {
			block:blockName,
			em: em,
			strong: strong,
			strike: strike,
			underline: underline,
			superscription: superscription,
			subscription: subscription,
			list: list,
			justification: justification,
			foregroundColor: foregroundColor,
			backgroundColor: backgroundColor,
			fontSize: fontSize,
			fontName: fontName
		};
	},
	
	/**
	 * Checks if the element has one or more important attributes: id, class, style
	 *
	 * @param {Element} element Target element
	 */
	hasImportantAttributes: function(element) {throw "Not implemented"},
	
	/**
	 * Checks if the element is empty or not. Place-holder is not counted as a child.
	 *
	 * @param {Element} element Target element
	 */
	isEmptyBlock: function(element) {throw "Not implemented"},
	
	/**
	 * Returns element that contains caret.
	 */
	getCurrentElement: function() {throw "Not implemented"},
	
	/**
	 * Returns block element that contains caret. Trident overrides this method.
	 */
	getCurrentBlockElement: function() {
		var cur = this.getCurrentElement();
		if(!cur) return null;
		
		var block = this.getParentBlockElementOf(cur);
		if(!block) return null;
		
		return (block.nodeName === "BODY") ? null : block;
	},
	
	/**
	 * Returns parent block element of parameter.
	 * If the parameter itself is a block, it will be returned.
	 *
	 * @param {Element} element Target element
	 *
	 * @returns {Element} Element or null
	 */
	getParentBlockElementOf: function(element) {
		while(element) {
			if(this.tree._blockTags.indexOf(element.nodeName) !== -1) return element;
			element = element.parentNode;
		}
		return null;
	},
	
	/**
	 * Returns parent element of parameter which has one of given tag name.
	 * If the parameter itself has the same tag name, it will be returned.
	 *
	 * @param {Element} element Target element
	 * @param {Array} tagNames Array of string which contains tag names
	 *
	 * @returns {Element} Element or null
	 */
	getParentElementOf: function(element, tagNames) {
		while(element) {
			if(tagNames.indexOf(element.nodeName) !== -1) return element;
			element = element.parentNode;
		}
		return null;
	},
	
	/**
	 * Collects all block elements between two elements
	 *
	 * @param {Element} from Start element(inclusive)
	 * @param {Element} to End element(inclusive)
	 */
	getBlockElementsBetween: function(from, to) {
		return this.tree.collectNodesBetween(from, to, function(node) {
			return node.nodeType === 1 && this.tree.isBlock(node);
		}.bind(this));
	},
	
	/**
	 * Returns block element that contains selection start.
	 *
	 * This method will return exactly same result with getCurrentBlockElement method
	 * when there's no selection.
	 */
	getBlockElementAtSelectionStart: function() {throw "Not implemented"},
	
	/**
	 * Returns block element that contains selection end.
	 *
	 * This method will return exactly same result with getCurrentBlockElement method
	 * when there's no selection.
	 */
	getBlockElementAtSelectionEnd: function() {throw "Not implemented"},
	
	/**
	 * Returns blocks at each edge of selection(start and end).
	 *
	 * TODO: implement ignoreEmptyEdges for FF
	 *
	 * @param {boolean} naturalOrder Mak the start element always comes before the end element
	 * @param {boolean} ignoreEmptyEdges Prevent some browser(Gecko) from selecting one more block than expected
	 */
	getBlockElementsAtSelectionEdge: function(naturalOrder, ignoreEmptyEdges) {throw "Not implemented"},
	
	/**
	 * Returns array of selected block elements
	 */
	getSelectedBlockElements: function() {
		var selectionEdges = this.getBlockElementsAtSelectionEdge(true, true);
		var start = selectionEdges[0];
		var end = selectionEdges[1];
		
		return this.tree.collectNodesBetween(start, end, function(node) {
			return node.nodeType === 1 && this.tree.isBlock(node);
		}.bind(this));
	},
	
	/**
	 * Get element by ID
	 *
	 * @param {String} id Element's ID
	 * @returns {Element} element or null
	 */
	getElementById: function(id) {return this.getDoc().getElementById(id)},
	
	/**
	 * Shortcut for #getElementById
	 */
	$: function(id) {return this.getElementById(id)},
	
	/**
	  * Returns first "valid" child of given element. It ignores empty textnodes.
	  *
	  * @param {Element} element Target element
	  * @returns {Node} first child node or null
	  */
	getFirstChild: function(element) {
		if(!element) return null;
		
		var nodes = xq.$A(element.childNodes);
		return nodes.find(function(node) {return !this.isEmptyTextNode(node)}.bind(this));
	},
	
	/**
	  * Returns last "valid" child of given element. It ignores empty textnodes and place-holders.
	  *
	  * @param {Element} element Target element
	  * @returns {Node} last child node or null
	  */
	getLastChild: function(element) {throw "Not implemented"},

	getNextSibling: function(node) {
		while(node = node.nextSibling) {
			if(node.nodeType !== 3 || !node.nodeValue.isBlank()) break;
		}
		return node;
	},

	getBottommostFirstChild: function(node) {
		while(node.firstChild && node.nodeType === 1) node = node.firstChild;
		return node;
	},
	
	getBottommostLastChild: function(node) {
		while(node.lastChild && node.nodeType === 1) node = node.lastChild;
		return node;
	},
	
	/** @private */
	_getCssValue: function(str, defaultUnit) {
		if(!str || str.length === 0) return {value:0, unit:defaultUnit};
		
		var tokens = str.match(/(\d+)(.*)/);
		return {
			value:parseInt(tokens[1]),
			unit:tokens[2] || defaultUnit
		};
	}
});
/**
 * @requires Xquared.js
 * @requires rdom/Base.js
 */
xq.rdom.Trident = xq.Class(xq.rdom.Base,
	/**
	 * @name xq.rdom.Trident
	 * @lends xq.rdom.Trident.prototype
	 * @extends xq.rdom.Base
	 * @constructor
	 */
	{
	makePlaceHolder: function() {
		return this.createTextNode(" ");
	},
	
	makePlaceHolderString: function() {
		return '&nbsp;';
	},
	
	makeEmptyParagraph: function() {
		return this.createElementFromHtml("<p>&nbsp;</p>");
	},

	isPlaceHolder: function(node) {
		return false;
	},

	getOuterHTML: function(element) {
		return element.outerHTML;
	},

	getCurrentBlockElement: function() {
		var cur = this.getCurrentElement();
		if(!cur) return null;
		
		var block = this.getParentBlockElementOf(cur);
		if(!block) return null;
		
		if(block.nodeName === "BODY") {
			// Atomic block such as HR
			var newParagraph = this.insertNode(this.makeEmptyParagraph());
			var next = newParagraph.nextSibling;
			if(this.tree.isAtomic(next)) {
				this.deleteNode(newParagraph);
				return next;
			}
		} else {
			return block;
		}
	},
	
	insertNode: function(node) {
		if(this.hasSelection()) this.collapseSelection(true);
		
		this.rng().pasteHTML('<span id="xquared_temp"></span>');
		var marker = this.$('xquared_temp');
		if(node.id === 'xquared_temp') return marker;
		
		if(marker) marker.replaceNode(node);
		return node;
	},
	
	removeTrailingWhitespace: function(block) {
		if(!block) return;
		
		// @TODO: reimplement to handle atomic tags and so on. (use DomTree)
		if(this.tree.isBlockOnlyContainer(block)) return;
		if(this.isEmptyBlock(block)) return;
		
		var text = block.innerText;
		var html = block.innerHTML;
		var lastCharCode = text.charCodeAt(text.length - 1);
		if(text.length <= 1 || [32,160].indexOf(lastCharCode) === -1) return;
		
		// shortcut for most common case
		if(text == html.replace(/&nbsp;/g, " ")) {
			block.innerHTML = html.replace(/&nbsp;$/, "");
			return;
		}
		
		var node = block;
		while(node && node.nodeType !== 3) node = node.lastChild;
		if(!node) return;
		
		// DO NOT REMOVE OR MODIFY FOLLOWING CODE. Modifying following code will crash IE7
		var nodeValue = node.nodeValue;
		if(nodeValue.length <= 1) {
			this.deleteNode(node, true);
		} else {
			node.nodeValue = nodeValue.substring(0, nodeValue.length - 1);
		}
	},
	
	correctEmptyElement: function(element) {
		if(!element || element.nodeType !== 1 || this.tree.isAtomic(element)) return;
		
		if(element.firstChild) {
			this.correctEmptyElement(element.firstChild);
		} else {
			element.innerHTML = "&nbsp;";
		}
	},

	copyAttributes: function(from, to, copyId) {
		to.mergeAttributes(from, !copyId);
	},

	correctParagraph: function() {
		if(!this.hasFocus()) return false;
		if(this.hasSelection()) return false;
		
		var block = this.getCurrentElement();
		
		// if caret is at
		//  * atomic block level elements(HR) or
		//  * ...
		// then following is true
		if(this.tree.isBlockOnlyContainer(block)) {
			// check for atomic block element such as HR
			block = this.insertNode(this.makeEmptyParagraph());
			if(this.tree.isAtomic(block.nextSibling)) {
				// @WORKAROUND:
				// At this point, HR has a caret but getCurrentElement() doesn't return the HR and
				// I couldn't find a way to get this HR. So I have to keep this reference.
				// I will be used in Editor._handleEnter.
				this.recentHR = block.nextSibling;
				this.deleteNode(block);
				return false;
			} else {
				// I can't remember exactly when following is executed and what it does :-(
				//  * Case 1: Performing Ctrl+A and Ctrl+X repeatedly
				//  * ...
				var nextBlock = this.tree.findForward(
					block,
					function(node) {return this.tree.isBlock(node) && !this.tree.isBlockOnlyContainer(node)}.bind(this)
				);
				
				if(nextBlock) {
					this.deleteNode(block);
					this.placeCaretAtStartOf(nextBlock);
				} else {
					this.placeCaretAtStartOf(block);
				}
				
				return true;
			}
		} else {
			block = this.getCurrentBlockElement();
			if(block.nodeType === 3) block = block.parentNode;
			
			if(this.tree.hasMixedContents(block)) {
				var marker = this.pushMarker();
				this.wrapAllInlineOrTextNodesAs("P", block, true);
				this.popMarker(true);
				return true;
			} else if((this.tree.isTextOrInlineNode(block.previousSibling) || this.tree.isTextOrInlineNode(block.nextSibling)) && this.tree.hasMixedContents(block.parentNode)) {
				// @WORKAROUND:
				// IE?�ì„œ??Blockê³?Inline/Textê°??¸ì ‘??경우 getCurrentElement ?±ì�´ ?¤ìž‘?™í•œ??
				// ?°ë�¼???„재 Block 주ë?까ì? ?œë²ˆ???¡ì•„주어???œë‹¤.
				this.wrapAllInlineOrTextNodesAs("P", block.parentNode, true);
				return true;
			} else {
				return false;
			}
		}
	},
	
	
	
	//////
	// Commands
	execCommand: function(commandId, param) {
		return this.getDoc().execCommand(commandId, false, param);
	},
	
	applyBackgroundColor: function(color) {
		this.execCommand("BackColor", color);
	},
	
	applyEmphasis: function() {
		// Generate <i> tag. It will be replaced with <emphasis> tag during cleanup phase.
		this.execCommand("Italic");
	},
	applyStrongEmphasis: function() {
		// Generate <b> tag. It will be replaced with <strong> tag during cleanup phase.
		this.execCommand("Bold");
	},
	applyStrike: function() {
		// Generate <strike> tag. It will be replaced with <style class="strike"> tag during cleanup phase.
		this.execCommand("strikethrough");
	},
	applyUnderline: function() {
		// Generate <u> tag. It will be replaced with <em class="underline"> tag during cleanup phase.
		this.execCommand("underline");
	},
	applyRemoveFormat: function() {
		this.execCommand("RemoveFormat");
	},
	applyRemoveLink: function() {
		this.execCommand("Unlink");
	},



	//////
	// Focus/Caret/Selection
	
	focus: function() {
		this.getWin().focus();
	},

	sel: function() {
		return this.getDoc().selection;
	},
	
	crng: function() {
		return this.getDoc().body.createControlRange();
	},
	
	rng: function() {
		try {
			var sel = this.sel();
			return (sel === null) ? null : sel.createRange();
		} catch(ignored) {
			// IE often fails
			return null;
		}
	},
	
	hasSelection: function() {
		var selectionType = this.sel().type.toLowerCase();
		if("none" === selectionType) return false;
		if("text" === selectionType && this.getSelectionAsHtml().length === 0) return false;
		return true;
	},
	
	deleteSelection: function() {
		if(this.getSelectionAsText() !== "") this.sel().clear();
	},
	
	placeCaretAtStartOf: function(element) {
		// If there's no empty span, caret sometimes moves into a previous node.
		var ph = this.insertNodeAt(this.createElement("SPAN"), element, "start");
		this.selectElement(ph);
		this.collapseSelection(false);
		this.deleteNode(ph);
	},
	
	selectElement: function(element, entireElement, forceTextSelection) {
		if(!element) throw "[element] is null";
		if(element.nodeType !== 1) throw "[element] is not an element";
		
		var rng = null;
		if(!forceTextSelection && this.tree.isAtomic(element)) {
			rng = this.crng();
			rng.addElement(element);
		} else {
			var rng = this.rng();
			rng.moveToElementText(element);
		}
		rng.select();
	},

	selectBlocksBetween: function(start, end) {
		var rng = this.rng();
		var rngTemp = this.rng();

		rngTemp.moveToElementText(start);
		rng.setEndPoint("StartToStart", rngTemp);
		
		rngTemp.moveToElementText(end);
		rng.setEndPoint("EndToEnd", rngTemp);
		
		rng.select();
	},
	
	collapseSelection: function(toStart) {
		if(this.sel().type.toLowerCase() === "control") {
			var curElement = this.getCurrentElement();
			this.sel().empty();
			this.selectElement(curElement, false, true);
		}
		var rng = this.rng();
		rng.collapse(toStart);
		rng.select();
	},
	
	getSelectionAsHtml: function() {
		var rng = this.rng()
		return rng && rng.htmlText ? rng.htmlText : ""
	},
	
	getSelectionAsText: function() {
		var rng = this.rng();
		return rng && rng.text ? rng.text : "";
	},
	
	hasImportantAttributes: function(element) {
		return !!(element.id || element.className || element.style.cssText);
	},

	isEmptyBlock: function(element) {
		if(!element.hasChildNodes()) return true;
		if(element.nodeType === 3 && !element.nodeValue) return true;
		if(["&nbsp;", " ", ""].indexOf(element.innerHTML) !== -1) return true;
		
		return false;
	},
	
	getLastChild: function(element) {
		if(!element || !element.hasChildNodes()) return null;
		
		var nodes = xq.$A(element.childNodes).reverse();
		
		for(var i = 0; i < nodes.length; i++) {
			if(nodes[i].nodeType !== 3 || nodes[i].nodeValue.length !== 0) return nodes[i];
		}
		
		return null;
	},
	
	getCurrentElement: function() {
		if(this.sel().type.toLowerCase() === "control") return this.rng().item(0);
		
		var rng = this.rng();
		if(!rng) return false;
		
		var element = rng.parentElement();
		if(element.nodeName == "BODY" && this.hasSelection()) return null;
		return element;
	},
	
	getBlockElementAtSelectionStart: function() {
		var rng = this.rng();
		var dup = rng.duplicate();
		dup.collapse(true);
		
		var result = this.getParentBlockElementOf(dup.parentElement());
		if(result.nodeName === "BODY") result = result.firstChild;
		
		return result;
	},
	
	getBlockElementAtSelectionEnd: function() {
		var rng = this.rng();
		var dup = rng.duplicate();
		dup.collapse(false);
		
		var result = this.getParentBlockElementOf(dup.parentElement());
		if(result.nodeName === "BODY") result = result.lastChild;
		
		return result;
	},
	
	getBlockElementsAtSelectionEdge: function(naturalOrder, ignoreEmptyEdges) {
		return [
			this.getBlockElementAtSelectionStart(),
			this.getBlockElementAtSelectionEnd()
		];
	},
	
	isCaretAtBlockEnd: function() {
		if(this.isCaretAtEmptyBlock()) return true;
		if(this.hasSelection()) return false;
		
		var node = this.getCurrentBlockElement();
		var marker = this.pushMarker();
		var isTrue = false;
		while (node = this.getLastChild(node)) {
			var nodeValue = node.nodeValue;
			
			if (node === marker) {
				isTrue = true;
				break;
			} else if(
				node.nodeType === 3 &&
				node.previousSibling === marker &&
				(nodeValue === " " || (nodeValue.length === 1 && nodeValue.charCodeAt(0) === 160))
			) {
				isTrue = true;
				break;
			}
		}
		
		this.popMarker();
		return isTrue;
	},
	
	saveSelection: function() {
		return this.rng();
	},
	
	restoreSelection: function(bookmark) {
		bookmark.select();
	}
});

/**
 * Base for W3C Standard Engine
 * 
 * @requires Xquared.js
 * @requires rdom/Base.js
 */
xq.rdom.W3 = xq.Class(xq.rdom.Base,
	/**
	 * @name xq.rdom.W3
	 * @lends xq.rdom.W3.prototype
	 * @extends xq.rdom.Base
	 * @constructor
	 */
	{
	insertNode: function(node) {
		var rng = this.rng();
		
		if(!rng) {
			this.getRoot().appendChild(node);
		} else {
			rng.insertNode(node);
			rng.selectNode(node);
			rng.collapse(false);
		}
		return node;
	},
	
	removeTrailingWhitespace: function(block) {
		// TODO: do nothing
	},
	
	getOuterHTML: function(element) {
		var div = element.ownerDocument.createElement("div");
		div.appendChild(element.cloneNode(true));
		return div.innerHTML;
	},
	
	correctEmptyElement: function(element) {
		if(!element || element.nodeType !== 1 || this.tree.isAtomic(element)) return;
		
		if(element.firstChild)
			this.correctEmptyElement(element.firstChild);
		else
			element.appendChild(this.makePlaceHolder());
	},
	
	correctParagraph: function() {
		if(this.hasSelection()) return false;
		
		var block = this.getCurrentBlockElement();
		var modified = false;
		
		if(!block) {
			try {
				this.execCommand("InsertParagraph");
				modified = true;
			} catch(ignored) {}
		} else if(this.tree.isBlockOnlyContainer(block)) {
			this.execCommand("InsertParagraph");
			
			// check for HR
			var newBlock = this.getCurrentElement();
			
			if(this.tree.isAtomic(newBlock.previousSibling) && newBlock.previousSibling.nodeName === "HR") {
				var nextBlock = this.tree.findForward(
					newBlock,
					function(node) {return this.tree.isBlock(node) && !this.tree.isBlockOnlyContainer(node)}.bind(this)
				);
				if(nextBlock) {
					this.deleteNode(newBlock);
					this.placeCaretAtStartOf(nextBlock);
				}
			}
			modified = true;
		} else if(this.tree.hasMixedContents(block)) {
			this.wrapAllInlineOrTextNodesAs("P", block, true);
			modified = true;
		}
		
		// insert placeholder - part 1
		block = this.getCurrentBlockElement();
		if(this.tree.isBlock(block) && !this._hasPlaceHolderAtEnd(block)) {
			block.appendChild(this.makePlaceHolder());
			modified = true;
		}
		
		// insert placeholder - part 2
		if(this.tree.isBlock(block)) {
			var parentsLastChild = block.parentNode.lastChild;
			if(this.isPlaceHolder(parentsLastChild)) {
				this.deleteNode(parentsLastChild);
				modified = true;
			}
		}
		
		// remove empty elements
		if(this.tree.isBlock(block)) {
			var nodes = block.childNodes;
			for(var i = 0; i < nodes.length; i++) {
				var node = nodes[i];
				if(node.nodeType === 1 && !this.tree.isAtomic(node) && !node.hasChildNodes() && !this.isPlaceHolder(node)) {
					this.deleteNode(node);
				}
			}
		}
		
		return modified;
	},
	
	_hasPlaceHolderAtEnd: function(block) {
		if(!block.hasChildNodes()) return false;
		return this.isPlaceHolder(block.lastChild) || this._hasPlaceHolderAtEnd(block.lastChild);
	},
	
	applyBackgroundColor: function(color) {
		this.execCommand("styleWithCSS", "true");
		this.execCommand("hilitecolor", color);
		this.execCommand("styleWithCSS", "false");
		
		// 0. Save current selection
		var bookmark = this.saveSelection();
		
		// 1. Get selected blocks
		var blocks = this.getSelectedBlockElements();
		if(blocks.length === 0) return;
		
		// 2. Apply background-color to all adjust inline elements
		// 3. Remove background-color from blocks
		for(var i = 0; i < blocks.length; i++) {
			if((i === 0 || i === blocks.length-1) && !blocks[i].style.backgroundColor) continue;
			
			var spans = this.wrapAllInlineOrTextNodesAs("SPAN", blocks[i], true);
			for(var j = 0; j < spans.length; j++) {
				spans[j].style.backgroundColor = color;
			}
			blocks[i].style.backgroundColor = "";
		}
		
		// 4. Restore selection
		this.restoreSelection(bookmark);
	},
	
	
	
	
	//////
	// Commands
	execCommand: function(commandId, param) {
		return this.getDoc().execCommand(commandId, false, param || null);
	},
	
	applyRemoveFormat: function() {
		this.execCommand("RemoveFormat");
	},
	applyRemoveLink: function() {
		this.execCommand("Unlink");
	},
	applyEmphasis: function() {
		// Generate <i> tag. It will be replaced with <emphasis> tag during cleanup phase.
		this.execCommand("styleWithCSS", "false");
		this.execCommand("italic");
	},
	applyStrongEmphasis: function() {
		// Generate <b> tag. It will be replaced with <strong> tag during cleanup phase.
		this.execCommand("styleWithCSS", "false");
		this.execCommand("bold");
	},
	applyStrike: function() {
		// Generate <strike> tag. It will be replaced with <style class="strike"> tag during cleanup phase.
		this.execCommand("styleWithCSS", "false");
		this.execCommand("strikethrough");
	},
	applyUnderline: function() {
		// Generate <u> tag. It will be replaced with <em class="underline"> tag during cleanup phase.
		this.execCommand("styleWithCSS", "false");
		this.execCommand("underline");
	},
	
	
	
	//////
	// Focus/Caret/Selection
	
	focus: function() {
		this.getWin().focus();
	},
	
	sel: function() {
		return this.getWin().getSelection();
	},
	
	rng: function() {
		var sel = this.sel();
		return (sel === null || sel.rangeCount === 0) ? null : sel.getRangeAt(0);
	},
	
	saveSelection: function() {
		var rng = this.rng();
		return [rng.startContainer, rng.startOffset, rng.endContainer, rng.endOffset];
	},
	
	restoreSelection: function(bookmark) {
		var rng = this.rng();
		rng.setStart(bookmark[0], bookmark[1]);
		rng.setEnd(bookmark[2], bookmark[3]);
	},
	
	hasSelection: function() {
		var sel = this.sel();
		return sel && !sel.isCollapsed;
	},
	
	deleteSelection: function() {
		this.rng().deleteContents();
		this.sel().collapseToStart();
	},
	
	selectElement: function(element, entireElement) {throw "Not implemented yet"},

	selectBlocksBetween: function(start, end) {
		// @WORKAROUND: required to avoid FF selection bug.
		try {
			if(!xq.Browser.isMac) this.getDoc().execCommand("SelectAll", false, null);
		} catch(ignored) {}
		
		var rng = this.rng();
		rng.setStart(start.firstChild, 0);
		rng.setEnd(end, end.childNodes.length);
	},

	collapseSelection: function(toStart) {
		var rng = this.rng();
		if(rng) rng.collapse(toStart);
	},
	
	placeCaretAtStartOf: function(element) {
		while(this.tree.isBlock(element.firstChild)) {
			element = element.firstChild;
		}
		this.selectElement(element, false);
		this.collapseSelection(true);
	},
	
	placeCaretAtEndOf: function(element) {
		while(this.tree.isBlock(element.lastChild)) {
			element = element.lastChild;
		}
		this.selectElement(element, false);
		this.collapseSelection(false);
	},
	
	getSelectionAsHtml: function() {
		var container = document.createElement("div");
		container.appendChild(this.rng().cloneContents());
		return container.innerHTML;
	},
	
	getSelectionAsText: function() {
		return this.rng().toString()
	},
	
	hasImportantAttributes: function(element) {
		return !!(element.id || element.className || element.style.cssText);
	},
	
	isEmptyBlock: function(element) {
		if(!element.hasChildNodes()) return true;
		var children = element.childNodes;
		for(var i = 0; i < children.length; i++) {
			if(!this.isPlaceHolder(children[i]) && !this.isEmptyTextNode(children[i])) return false;
		}
		return true;
	},
	
	getLastChild: function(element) {
		if(!element || !element.hasChildNodes()) return null;
		
		var nodes = xq.$A(element.childNodes).reverse();
		
		for(var i = 0; i < nodes.length; i++) {
			if(!this.isPlaceHolder(nodes[i]) && !this.isEmptyTextNode(nodes[i])) return nodes[i];
		}
		return null;
	},
	
	getCurrentElement: function() {
		var rng = this.rng();
		if(!rng) return null;
		
		var container = rng.startContainer;
		
		if(container.nodeType === 3) {
			return container.parentNode;
		} else if(this.tree.isBlockOnlyContainer(container)) {
			return container.childNodes[rng.startOffset];
		} else {
			return container;
		}
	},

	getBlockElementsAtSelectionEdge: function(naturalOrder, ignoreEmptyEdges) {
		var start = this.getBlockElementAtSelectionStart();
		var end = this.getBlockElementAtSelectionEnd();
		
		var reversed = false;
		
		if(naturalOrder && start !== end && this.tree.checkTargetBackward(start, end)) {
			var temp = start;
			start = end;
			end = temp;
			
			reversed = true;
		}
		
		if(ignoreEmptyEdges && start !== end) {
			// @TODO: Firefox sometimes selects one more block.
/*
			
			var sel = this.sel();
			if(reversed) {
				if(sel.focusNode.nodeType === 1) start = start.nextSibling;
				if(sel.anchorNode.nodeType === 3 && sel.focusOffset === 0) end = end.previousSibling;
			} else {
				if(sel.anchorNode.nodeType === 1) start = start.nextSibling;
				if(sel.focusNode.nodeType === 3 && sel.focusOffset === 0) end = end.previousSibling;
			}
*/
		}
		
		return [start, end];
	},

	isCaretAtBlockEnd: function() {
		if(this.isCaretAtEmptyBlock()) return true;
		if(this.hasSelection()) return false;
		
		var node = this.getCurrentBlockElement();
		var marker = this.pushMarker();
		
		var isTrue = false;
		while (node = this.getLastChild(node)) {
			var nodeValue = node.nodeValue;
			
			if (node === marker) {
				isTrue = true;
				break;
			}
		}
		
		this.popMarker();
		return isTrue;
	},
	
	getBlockElementAtSelectionStart: function() {
		var block = this.getParentBlockElementOf(this.sel().anchorNode);
		
		// find bottom-most first block child
		while(this.tree.isBlockContainer(block) && block.firstChild && this.tree.isBlock(block.firstChild)) {
			block = block.firstChild;
		}
		
		return block;
	},
	
	getBlockElementAtSelectionEnd: function() {
		var block = this.getParentBlockElementOf(this.sel().focusNode);
		
		// find bottom-most last block child
		while(this.tree.isBlockContainer(block) && block.lastChild && this.tree.isBlock(block.lastChild)) {
			block = block.lastChild;
		}
		
		return block;
	}
});

/**
 * @requires Xquared.js
 * @requires rdom/W3.js
 */
xq.rdom.Gecko = xq.Class(xq.rdom.W3,
	/**
	 * @name xq.rdom.Gecko
	 * @lends xq.rdom.Gecko.prototype
	 * @extends xq.rdom.W3
	 * @constructor
	 */
	{
	makePlaceHolder: function() {
		var holder = this.createElement("BR");
		holder.setAttribute("type", "_moz");
		return holder;
	},
	
	makePlaceHolderString: function() {
		return '<br type="_moz" />';
	},
	
	makeEmptyParagraph: function() {
		return this.createElementFromHtml('<p><br type="_moz" /></p>');
	},

	isPlaceHolder: function(node) {
		return node.nodeName === "BR" && (node.getAttribute("type") === "_moz" || !this.getNextSibling(node));
	},

	selectElement: function(element, entireElement) {
		if(!element) throw "[element] is null";
		if(element.nodeType !== 1) throw "[element] is not an element";

		// @WORKAROUND: required to avoid Windows FF selection bug.
		try {
			if(!xq.Browser.isMac) this.getDoc().execCommand("SelectAll", false, null);
		} catch(ignored) {}
		
		var rng = this.rng() || this.getDoc().createRange();
		
		if(entireElement) {
			rng.selectNode(element);
		} else {
			rng.selectNodeContents(element);
		}
	}
});

/**
 * @requires Xquared.js
 * @requires rdom/W3.js
 */
xq.rdom.Webkit = xq.Class(xq.rdom.W3,
	/**
	 * @name xq.rdom.Webkit
	 * @lends xq.rdom.Webkit.prototype
	 * @extends xq.rdom.Base
	 * @constructor
	 */
	{
	makePlaceHolder: function() {
		var holder = this.createElement("BR");
		holder.className = "webkit-block-placeholder";
		return holder;
	},
	
	makePlaceHolderString: function() {
		return '<br class="webkit-block-placeholder" />';
	},
	
	makeEmptyParagraph: function() {
		return this.createElementFromHtml('<p><br class="webkit-block-placeholder" /></p>');
	},
	
	isPlaceHolder: function(node) {
		return node.className === "webkit-block-placeholder";
	},

	selectElement: function(element, entireElement) {
		if(!element) throw "[element] is null";
		if(element.nodeType !== 1) throw "[element] is not an element";
		
		var rng = this.rng() || this.getDoc().createRange();
		if(entireElement) {
			rng.selectNode(element);
		} else {
			rng.selectNodeContents(element);
		}
		
		this._setSelectionByRange(rng);
	},

	getSelectionAsHtml: function() {
		var container = this.createElement("div");
		var rng = this.rng();
		var contents = this.rng().cloneContents();
		if(contents) container.appendChild(contents);
		return container.innerHTML;
	},

	collapseSelection: function(toStart) {
		var rng = this.rng();
		rng.collapse(toStart);
		this._setSelectionByRange(rng);
	},

	_setSelectionByRange: function(rng) {
		var sel = this.sel();
		sel.setBaseAndExtent(rng.startContainer, rng.startOffset, rng.endContainer, rng.endOffset);
	}
});
/**
 * Creates and returns instance of browser specific implementation.
 * 
 * @requires Xquared.js
 * @requires rdom/Base.js
 * @requires rdom/Trident.js
 * @requires rdom/Gecko.js
 * @requires rdom/Webkit.js
 */
xq.rdom.Base.createInstance = function() {
	if(xq.Browser.isTrident) {
		return new xq.rdom.Trident();
	} else if(xq.Browser.isWebkit) {
		return new xq.rdom.Webkit();
	} else {
		return new xq.rdom.Gecko();
	}
}
/**
 * @namespace
 */
xq.validator = {}

/**
 * @requires Xquared.js
 * @requires Browser.js
 * @requires rdom/Factory.js
 */
xq.validator.Base = xq.Class(/** @lends xq.validator.Base.prototype */{
	/**
     * @constructs
	 */
	initialize: function(curUrl, urlValidationMode, whitelist) {
		xq.addToFinalizeQueue(this);
		xq.asEventSource(this, "Validator", ["Preprocessing", "BeforeDomValidation", "AfterDomValidation", "BeforeStringValidation", "AfterStringValidation", "BeforeDomInvalidation", "AfterDomInvalidation", "BeforeStringInvalidation", "AfterStringInvalidation"]);
		
		this.whitelist = whitelist || xq.predefinedWhitelist;
		this.pRGB = xq.compilePattern("rgb\\((\\d+),\\s*(\\d+),\\s*(\\d+)\\)");
		
		this.curUrl = curUrl;
		this.curUrlParts = curUrl ? curUrl.parseURL() : null;
		this.urlValidationMode = urlValidationMode;
	},
	
	/**
	 * Perform validation on given element
	 *
	 * @param {Element} element Target element. It is not affected by validation.
	 *
	 * @returns {String} Validated HTML string
	 */
	validate: function(element, dontClone) {
		// DOM validation
		element = dontClone ? element : element.cloneNode(true);
		this._fireOnBeforeDomValidation(element);
		this.validateDom(element);
		this._fireOnAfterDomValidation(element);
		
		// String validation
		var html = {value: element.innerHTML};
		this._fireOnBeforeStringValidation(html);
		html.value = this.validateString(html.value);
		this._fireOnAfterStringValidation(html);
		
		return html.value;
	},
	
	validateDom: function(element) {throw "Not implemented";},
	validateString: function(html) {throw "Not implemented";},
	
	/**
	 * Perform invalidation on given element to make the designmode works well.
	 *
	 * @param {String} html HTML string.
	 * @returns {String} Invalidated HTML string
	 */
	invalidate: function(html) {
		// Preprocessing
		var html = {value: html};
		this._fireOnPreprocessing(html);
		
		// DOM invalidation
		var element = document.createElement("DIV");
		element.innerHTML = html.value;
		this._fireOnBeforeDomInvalidation(element);
		this.invalidateDom(element);
		this._fireOnAfterDomInvalidation(element);
		
		// String invalidation
		html.value = element.innerHTML;
		this._fireOnBeforeStringInvalidation(html);
		html.value = this.invalidateString(html.value);
		this._fireOnAfterStringInvalidation(html);
		
		return html.value;
	},
	
	invalidateDom: function(element) {throw "Not implemented"},
	invalidateString: function(html) {throw "Not implemented"},
	
	/**
	 * em.class="underline" -> u
	 * span.class="strike" -> strike
	 */ 
	invalidateStrikesAndUnderlines: function(element) {
		var rdom = xq.rdom.Base.createInstance();
		rdom.setRoot(element);

		var nameOfClassName = xq.Browser.isTrident ? "className" : "class";
		
		var underlines = xq.getElementsByClassName(rdom.getRoot(), "underline", "em");
		var pUnderline = xq.compilePattern("(^|\\s)underline($|\\s)");
		var lenOfUnderlines = underlines.length;
		for(var i = 0; i < lenOfUnderlines; i++) {
			rdom.replaceTag("u", underlines[i]).removeAttribute(nameOfClassName);
		}
		
		var strikes = xq.getElementsByClassName(rdom.getRoot(), "strike", "span")
		var pStrike = xq.compilePattern("(^|\\s)strike($|\\s)");
		var lenOfStrikes = strikes.length;
		for(var i = 0; i < lenOfStrikes; i++) {
			rdom.replaceTag("strike", strikes[i]).removeAttribute(nameOfClassName);
		}
	},
	
	validateStrike: function(content) {
		content = content.replace(/<strike(>|\s+[^>]*>)/ig, "<span class=\"strike\"$1");
		content = content.replace(/<\/strike>/ig, "</span>");
		return content;
	},
	
	validateUnderline: function(content) {
		content = content.replace(/<u(>|\s+[^>]*>)/ig, "<em class=\"underline\"$1");
		content = content.replace(/<\/u>/ig, "</em>");
		return content;
	},
	
	replaceTag: function(content, from, to) {
		return content.replace(new RegExp("(</?)" + from + "(>|\\s+[^>]*>)", "ig"), "$1" + to + "$2");
	},
	
	validateSelfClosingTags: function(content) {
		return content.replace(/<(br|hr|img|value)([^>]*?)>/img, function(str, tag, attrs) {
			return "<" + tag + attrs + " />"
		});
	},
	
	validateFont: function(element) {
		var rdom = xq.rdom.Base.createInstance();
		rdom.setRoot(element);
		
		// It should be reversed to deal with nested elements
		var fonts = element.getElementsByTagName('FONT');
		var fontSizes = ["xx-small", "x-small", "small", "medium", "large", "x-large", "xx-large"];
		var len = fonts.length - 1;
		for(var i = len; i >= 0; i--) {
			var font = fonts[i];
			var color = font.getAttribute('color');
			var backgroundColor = font.style.backgroundColor;
			var face = font.getAttribute('face');
			var size = fontSizes[parseInt(font.getAttribute('size')) % 8 - 1];
			
			if(color || backgroundColor || face || size) {
				var span = rdom.replaceTag("span", font);
				span.removeAttribute('color');
				span.removeAttribute('face');
				span.removeAttribute('size');
				
				if(color) span.style.color = color;
				if(backgroundColor) span.style.backgroundColor = backgroundColor;
				if(face) span.style.fontFamily = face;
				if(size) span.style.fontSize = size;
			}
		}
	},
	
	invalidateFont: function(element) {
		var rdom = xq.rdom.Base.createInstance();
		rdom.setRoot(element);

		// It should be reversed to deal with nested elements
		var spans = element.getElementsByTagName('SPAN');
		var fontSizes = {"xx-small":1, "x-small":2, "small":3, "medium":4, "large":5, "x-large":6, "xx-large":7};
		var len = spans.length - 1;
		for(var i = len; i >= 0; i--) {
			var span = spans[i];
			if(span.className === "strike") continue;
			
			var color = span.style.color;
			var backgroundColor = span.style.backgroundColor;
			var face = span.style.fontFamily;
			var size = fontSizes[span.style.fontSize];
			
			if(color || backgroundColor || face || size) {
				var font = rdom.replaceTag("font", span);
				font.style.cssText = "";
				
				if(color) font.setAttribute('color', this.asRGB(color));
				if(backgroundColor) font.style.backgroundColor = backgroundColor;
				if(face) font.setAttribute('face', face);
				if(size) font.setAttribute('size', size);
			}
		}
	},
	
	asRGB: function(color) {
		if(color.indexOf("#") === 0) return color;
		
		var m = this.pRGB.exec(color);
		if(!m) return color;
		
		var r = Number(m[1]).toString(16);
		var g = Number(m[2]).toString(16);
		var b = Number(m[3]).toString(16);
		
		if(r.length === 1) r = "0" + r;
		if(g.length === 1) g = "0" + g;
		if(b.length === 1) b = "0" + b;
		
		return "#" + r + g + b;
	},
	
	removeComments: function(content) {
		return content.replace(/<!--.*?-->/img, '');
	},
	
	removeDangerousElements: function(element) {
		var scripts = element.getElementsByTagName('SCRIPT');
		for(var i = scripts.length - 1; i >= 0; i--) {
			scripts[i].parentNode.removeChild(scripts[i]);
		}
	},
	
	applyWhitelist: function(content) {
		var whitelist = this.whitelist;
		var allowedAttrs = null;
		
		var p1 = xq.compilePattern("(^|\\s\")([^\"=]+)(\\s|$)", "g");
		var p2 = xq.compilePattern("(\\S+?)=\"[^\"]*\"", "g");
		return content.replace(new RegExp("(</?)([^>]+?)(>|\\s+([^>]*?)(\\s?/?)>)", "g"), function(str, head, tag, tail, attrs, selfClosing) {
			if(!(allowedAttrs = whitelist[tag])) return '';
			
			if(attrs) {
				if(xq.Browser.isTrident) attrs = attrs.replace(p1, '$1$2="$2"$3');
				
				var sb = [];
				var m = attrs.match(p2);
				for(var i = 0; i < m.length; i++) {
					var name = m[i].split('=')[0];
					if(allowedAttrs.indexOf(name) !== -1) sb.push(m[i]);
				}
				
				if(sb.length) {
					attrs = sb.join(' ');
					return head + tag + ' ' + attrs + selfClosing + '>';
				} else {
					return head + tag + selfClosing + '>';
				}
			} else {
				return str;
			}
		});
	},
	
	// TODO: very expansive
	makeUrlsRelative: function(content) {
		var curUrl = this.curUrl;
		var urlParts = this.curUrlParts;
		
		var p1 = xq.compilePattern("(href|src)=\"([^\"]+)\"", "g");
		var p2 = xq.compilePattern("^\\w+://");
		
		// 1. find attributes and...
		return content.replace(/(<\w+\s+)(\/|([^>]+?)(\/?))>/g, function(str, head, ignored, attrs, tail) {
			if(attrs) {
				// 2. validate URL part
				attrs = attrs.replace(p1, function(str, name, url) {
					// 3. first, make it absolute
					var abs = null;
					if(url.charAt(0) === '#') {
						abs = urlParts.includeQuery + url;
					} else if(url.charAt(0) === '?') {
						abs = urlParts.includePath + url;
					} else if(url.charAt(0) === '/') {
						abs = urlParts.includeHost + url;
					} else if(url.match(p2)) {
						abs = url;
					} else {
						abs = urlParts.includeBase + url;
					}
					
					// 4. make it relative by removing same part
					var rel = abs;
					
					if(abs === urlParts.includeHost) {
						rel = "/";
					} else if(abs.indexOf(urlParts.includeQuery) === 0) {
						rel = abs.substring(urlParts.includeQuery.length);
					} else if(abs.indexOf(urlParts.includePath) === 0) {
						rel = abs.substring(urlParts.includePath.length);
					} else if(abs.indexOf(urlParts.includeBase) === 0) {
						rel = abs.substring(urlParts.includeBase.length);
					} else if(abs.indexOf(urlParts.includeHost) === 0) {
						rel = abs.substring(urlParts.includeHost.length);
					}
					
					if(rel === '') rel = '#';
					
					return name + '="' + rel + '"';
				});
				
				return head + attrs + tail + '>';
			} else {
				return str;
			}
		});
		
		return content;
	},
	
	// TODO: very expansive
	makeUrlsHostRelative: function(content) {
		var curUrl = this.curUrl;
		var urlParts = this.curUrlParts;
		
		var p1 = xq.compilePattern("(href|src)=\"([^\"]+)\"", "g");
		var p2 = xq.compilePattern("^\\w+://");
		
		// 1. find attributes and...
		return content.replace(/(<\w+\s+)(\/|([^>]+?)(\/?))>/g, function(str, head, ignored, attrs, tail) {
			if(attrs) {
				// 2. validate URL part
				attrs = attrs.replace(p1, function(str, name, url) {
					// 3. first, make it absolute
					var abs = null;
					if(url.charAt(0) === '#') {
						abs = urlParts.includeQuery + url;
					} else if(url.charAt(0) === '?') {
						abs = urlParts.includePath + url;
					} else if(url.charAt(0) === '/') {
						abs = urlParts.includeHost + url;
					} else if(url.match(p2)) {
						abs = url;
					} else {
						abs = urlParts.includeBase + url;
					}
					
					// 4. make it relative by removing same part
					var rel = abs;
					if(abs === urlParts.includeHost) {
						rel = "/";
					} else if(abs.indexOf(urlParts.includeQuery) === 0 && abs.indexOf("#") !== -1) {
						// same except for fragment-part?
						rel = abs.substring(abs.indexOf("#"));
					} else if(abs.indexOf(urlParts.includeHost) === 0) {
						// same host?
						rel = abs.substring(urlParts.includeHost.length);
					}
					
					if(rel === '') rel = '#';
					
					return name + '="' + rel + '"';
				});
				
				return head + attrs + tail + '>';
			} else {
				return str;
			}
		});
		
		return content;
	},
	
	// TODO: very expansive
	makeUrlsAbsolute: function(content) {
		var curUrl = this.curUrl;
		var urlParts = this.curUrlParts;
		
		var p1 = xq.compilePattern("(href|src)=\"([^\"]+)\"", "g");
		var p2 = xq.compilePattern("^\\w+://");
		
		// 1. find attributes and...
		return content.replace(/(<\w+\s+)(\/|([^>]+?)(\/?))>/g, function(str, head, ignored, attrs, tail) {
			if(attrs) {
				// 2. validate URL part
				attrs = attrs.replace(p1, function(str, name, url) {
					var abs = null;
					if(url.charAt(0) === '#') {
						abs = urlParts.includeQuery + url;
					} else if(url.charAt(0) === '?') {
						abs = urlParts.includePath + url;
					} else if(url.charAt(0) === '/') {
						abs = urlParts.includeHost + url;
					} else if(url.match(p2)) {
						abs = url;
					} else {
						abs = urlParts.includeBase + url;
					}

					return name + '="' + abs + '"';
				});
				
				return head + attrs + tail + '>';
			} else {
				return str;
			}
		});
	}
});
/**
 * @requires Xquared.js
 * @requires validator/Base.js
 */
xq.validator.Trident = xq.Class(xq.validator.Base,
	/**
	 * @name xq.validator.Trident
	 * @lends xq.validator.Trident.prototype
	 * @extends xq.validator.Base
	 * @constructor
	 */
	{
	validateDom: function(element) {
		this.removeDangerousElements(element);
		this.validateFont(element);
	},
	
	validateString: function(html) {
		try {
			html = this.validateStrike(html);
			html = this.validateUnderline(html);
			html = this.performFullValidation(html);
		} catch(ignored) {}
		
		return html;
	},
	
	invalidateDom: function(element) {
		this.invalidateFont(element);
		this.invalidateStrikesAndUnderlines(element);
	},
	
	invalidateString: function(html) {
		html = this.removeComments(html);
		return html;
	},
	
	performFullValidation: function(html) {
		html = this.lowerTagNamesAndUniformizeQuotation(html);
		html = this.validateSelfClosingTags(html);
		html = this.applyWhitelist(html);
		
		if(this.urlValidationMode === 'relative') {
			html = this.makeUrlsRelative(html);
		} else if(this.urlValidationMode === 'host_relative') {
			html = this.makeUrlsHostRelative(html);
		} else if(this.urlValidationMode === 'absolute') {
			// Trident always use absolute URL so we don't need to do anything.
			//
			// html = this.makeUrlsAbsolute(html);
		}
		
		return html;
	},
	
	lowerTagNamesAndUniformizeQuotation: function(html) {
		this.pAttrQuotation1 = xq.compilePattern("\\s(\\w+?)=\\s+\"([^\"]+)\"", "mg");
		this.pAttrQuotation2 = xq.compilePattern("\\s(\\w+?)=([^ \"]+)", "mg");
		this.pAttrQuotation3 = xq.compilePattern("\\sNAME=\"(\\w+?)\" VALUE=\"(\\w+?)\"", "mg");

		// Uniformize quotation, turn tag names and attribute names into lower case
		html = html.replace(/<(\/?)(\w+)([^>]*?)>/img, function(str, closingMark, tagName, attrs) {
			return "<" + closingMark + tagName.toLowerCase() + this.correctHtmlAttrQuotation(attrs) + ">";
		}.bind(this));
		
		return html;
	},
	
	correctHtmlAttrQuotation: function(html) {
		html = html.replace(this.pAttrQuotation1, function (str, name, value) {return " " + name.toLowerCase() + '=' + '"' + value + '"'});
		html = html.replace(this.pAttrQuotation2, function (str, name, value) {return " " + name.toLowerCase() + '=' + '"' + value + '"'});
		html = html.replace(this.pAttrQuotation3, function (str, name, value) {return " name=\"" + name + "\" value=\"" + value + "\""});
		return html;
	}
});
/**
 * @requires Xquared.js
 * @requires validator/Base.js
 */
xq.validator.W3 = xq.Class(xq.validator.Base,
	/**
	 * @name xq.validator.W3
	 * @lends xq.validator.W3.prototype
	 * @extends xq.validator.Base
	 * @constructor
	 */
	{
	validateDom: function(element) {
		var rdom = xq.rdom.Base.createInstance();
		rdom.setRoot(element);
		this.removeDangerousElements(element);
		rdom.removePlaceHoldersAndEmptyNodes(element);
		this.validateFont(element);
	},
	
	validateString: function(html) {
		try {
			html = this.replaceTag(html, "b", "strong");
			html = this.replaceTag(html, "i", "em");
			
			html = this.validateStrike(html);
			html = this.validateUnderline(html);
			html = this.addNbspToEmptyBlocks(html);
			html = this.performFullValidation(html);
			html = this.insertNewlineBetweenBlockElements(html);
		} catch(ignored) {}
		
		return html;
	},
	
	invalidateDom: function(element) {
		this.invalidateFont(element);
		this.invalidateStrikesAndUnderlines(element);
	},
	
	invalidateString: function(html) {
		html = this.replaceTag(html, "strong", "b");
		html = this.replaceTag(html, "em", "i");
		html = this.removeComments(html);
		html = this.replaceNbspToBr(html);
		return html;
	},
	
	performFullValidation: function(html) {
		html = this.validateSelfClosingTags(html);
		html = this.applyWhitelist(html);
		
		if(this.urlValidationMode === 'relative') {
			html = this.makeUrlsRelative(html);
		} else if(this.urlValidationMode === 'host_relative') {
			html = this.makeUrlsHostRelative(html);
		} else if(this.urlValidationMode === 'absolute') {
			html = this.makeUrlsAbsolute(html);
		}

		return html;
	},
	
	insertNewlineBetweenBlockElements: function(html) {
		var blocks = new xq.DomTree().getBlockTags().join("|");
		var regex = new RegExp("</(" + blocks + ")>([^\n])", "img");
		return html.replace(regex, '</$1>\n$2');
	},
	
	addNbspToEmptyBlocks: function(content) {
		var blocks = new xq.DomTree().getBlockTags().join("|");
		var regex = new RegExp("<(" + blocks + ")>\\s*?</(" + blocks + ")>", "img");
		return content.replace(regex, '<$1>&nbsp;</$2>');
	},
	
	replaceNbspToBr: function(content) {
		var blocks = new xq.DomTree().getBlockTags().join("|");
		
		// Safari replaces &nbsp; into \xA0
		var regex = new RegExp("<(" + blocks + ")>(&nbsp;|\xA0)?</(" + blocks + ")>", "img");
		var rdom = xq.rdom.Base.createInstance();
		return content.replace(regex, '<$1>' + rdom.makePlaceHolderString() + '</$3>');
	}
});

/**
 * @requires Xquared.js
 * @requires validator/W3.js
 */
xq.validator.Gecko = xq.Class(xq.validator.W3,
	/**
	 * @name xq.validator.Gecko
	 * @lends xq.validator.Gecko.prototype
	 * @extends xq.validator.W3
	 * @constructor
	 */
	{
});
/**
 * @requires Xquared.js
 * @requires validator/W3.js
 */
xq.validator.Webkit = xq.Class(xq.validator.W3,
	/**
	 * @name xq.validator.Webkit
	 * @lends xq.validator.Webkit.prototype
	 * @extends xq.validator.W3
	 * @constructor
	 */
	{
	validateDom: function(element) {
		var rdom = xq.rdom.Base.createInstance();
		rdom.setRoot(element);
		this.removeDangerousElements(element);
		rdom.removePlaceHoldersAndEmptyNodes(element);
		this.validateAppleStyleTags(element);
	},
	
	validateString: function(html) {
		try {
			html = this.addNbspToEmptyBlocks(html);
			html = this.performFullValidation(html);
			html = this.insertNewlineBetweenBlockElements(html);
		} catch(ignored) {}
		
		return html;
	},
	
	invalidateDom: function(element) {
		this.invalidateAppleStyleTags(element);
	},
	
	invalidateString: function(html) {
		html = this.replaceTag(html, "strong", "b");
		html = this.replaceTag(html, "em", "i");
		html = this.removeComments(html);
		html = this.replaceNbspToBr(html);
		return html;
	},
	
	validateAppleStyleTags: function(element) {
		var rdom = xq.rdom.Base.createInstance();
		rdom.setRoot(element);
		
		var nodes = xq.getElementsByClassName(rdom.getRoot(), "apple-style-span");
		for(var i = 0; i < nodes.length; i++) {
			var node = nodes[i];
			
			if(node.style.fontStyle === "italic") {
				// span -> em
				node = rdom.replaceTag("em", node);
				node.removeAttribute("class");
				node.style.fontStyle = "";
			} else if(node.style.fontWeight === "bold") {
				// span -> strong
				node = rdom.replaceTag("strong", node);
				node.removeAttribute("class");
				node.style.fontWeight = "";
			} else if(node.style.textDecoration === "underline") {
				// span -> em.underline
				node = rdom.replaceTag("em", node);
				node.className = "underline";
				node.style.textDecoration = "";
			} else if(node.style.textDecoration === "line-through") {
				// span -> span.strike
				node.className = "strike";
				node.style.textDecoration = "";
			} else if(node.style.verticalAlign === "super") {
				// span -> sup
				node = rdom.replaceTag("sup", node);
				node.removeAttribute("class");
				node.style.verticalAlign = "";
			} else if(node.style.verticalAlign === "sub") {
				// span -> sup
				node = rdom.replaceTag("sub", node);
				node.removeAttribute("class");
				node.style.verticalAlign = "";
			} else if(node.style.fontFamily) {
				// span -> span font-family
				node.removeAttribute("class");
			}
		}
	},
	
	invalidateAppleStyleTags: function(element) {
		var rdom = xq.rdom.Base.createInstance();
		rdom.setRoot(element);
		
		// span.strike -> span, span... -> span
		var spans = rdom.getRoot().getElementsByTagName("span");
		for(var i = 0; i < spans.length; i++) {
			var node = spans[i];
			if(node.className == "strike") {
				node.className = "Apple-style-span";
				node.style.textDecoration = "line-through";
			} else if(node.style.fontFamily) {
				node.className = "Apple-style-span";
			}
			// TODO: bg/fg/font-size
		}

		// em -> span, em.underline -> span
		var ems = rdom.getRoot().getElementsByTagName("em");
		for(var i = 0; i < ems.length; i++) {
			var node = ems[i];
			node = rdom.replaceTag("span", node);
			if(node.className === "underline") {
				node.className = "apple-style-span";
				node.style.textDecoration = "underline";
			} else {
				node.className = "apple-style-span";
				node.style.fontStyle = "italic";
			}
		}
		
		// strong -> span
		var strongs = rdom.getRoot().getElementsByTagName("strong");
		for(var i = 0; i < strongs.length; i++) {
			var node = strongs[i];
			node = rdom.replaceTag("span", node);
			node.className = "Apple-style-span";
			node.style.fontWeight = "bold";
		}
		
		// sup -> span
		var sups = rdom.getRoot().getElementsByTagName("sup");
		for(var i = 0; i < sups.length; i++) {
			var node = sups[i];
			node = rdom.replaceTag("span", node);
			node.className = "Apple-style-span";
			node.style.verticalAlign = "super";
		}
		
		// sub -> span
		var subs = rdom.getRoot().getElementsByTagName("sub");
		for(var i = 0; i < subs.length; i++) {
			var node = subs[i];
			node = rdom.replaceTag("span", node);
			node.className = "Apple-style-span";
			node.style.verticalAlign = "sub";
		}
	}
});
/**
 * Creates and returns instance of browser specific implementation.
 * 
 * @requires Xquared.js
 * @requires validator/Base.js
 * @requires validator/Trident.js
 * @requires validator/Gecko.js
 * @requires validator/Webkit.js
 */
xq.validator.Base.createInstance = function(curUrl, urlValidationMode, whitelist) {
	if(xq.Browser.isTrident) {
		return new xq.validator.Trident(curUrl, urlValidationMode, whitelist);
	} else if(xq.Browser.isWebkit) {
		return new xq.validator.Webkit(curUrl, urlValidationMode, whitelist);
	} else {
		return new xq.validator.Gecko(curUrl, urlValidationMode, whitelist);
	}
}
/**
 * @requires Xquared.js
 * @requires rdom/Factory.js
 */
xq.EditHistory = xq.Class(/** @lends xq.EditHistory.prototype */{
    /**
	 * Manages editing history and performs UNDO/REDO.
	 *
     * @constructs
	 * @param {xq.rdom.Base} rdom Base instance
	 * @param {Number} [max=100] maximum UNDO buffer size.
	 */
	initialize: function(rdom, max) {
		xq.addToFinalizeQueue(this);
		if (!rdom) throw "IllegalArgumentException";

		this.disabled = false;
		this.max = max || 100;
		this.rdom = rdom;
		this.index = -1;
		this.queue = [];
		
		this.lastModified = Date.get();
	},
	getLastModifiedDate: function() {
		return this.lastModified;
	},
	isUndoable: function() {
		return this.queue.length > 0 && this.index > 0;
	},
	isRedoable: function() {
		return this.queue.length > 0 && this.index < this.queue.length - 1;
	},
	disable: function() {
		this.disabled = true;
	},
	enable: function() {
		this.disabled = false;
	},
	undo: function() {
		this.pushContent();
		
		if (this.isUndoable()) {
			this.index--;
			this.popContent();
			return true;
		} else {
			return false;
		}
	},
	redo: function() {
		if (this.isRedoable()) {
			this.index++;
			this.popContent();
			return true;
		} else {
			return false;
		}
	},
	onCommand: function() {
		this.lastModified = Date.get();
		if(this.disabled) return false;
		
		return this.pushContent();
	},
	onEvent: function(event) {
		this.lastModified = Date.get();
		if(this.disabled) return false;
		
		var arrowKeys = [33,34,35,36,37,39];
		// @WORKAROUND: Mac?�ì„œ ?”ì‚´??up/down ?„ë? ??pushContent ?˜ë©´ ìº�럿???„다
		if(!xq.Browser.isMac) arrowKeys.push(38,40);
		
		// ignore some event types
		if(['blur', 'mouseup'].indexOf(event.type) !== -1) return false;
		
		// ignore normal keys
		if('keydown' === event.type && !(event.ctrlKey || event.metaKey)) return false;
		if(['keydown', 'keyup', 'keypress'].indexOf(event.type) !== -1 && !event.ctrlKey && !event.altKey && !event.metaKey && arrowKeys.indexOf(event.keyCode) === -1) return false;
		if(['keydown', 'keyup', 'keypress'].indexOf(event.type) !== -1 && (event.ctrlKey || event.metaKey) && [89,90].indexOf(event.keyCode) !== -1) return false;

		// ignore ctrl/shift/alt/meta keys
		if([16,17,18,224].indexOf(event.keyCode) !== -1) return false;
		
		return this.pushContent();
	},
	popContent: function() {
		this.lastModified = Date.get();
		var entry = this.queue[this.index];
		if (entry.caret > 0) {
			var html=entry.html.substring(0, entry.caret) + '<span id="caret_marker_eh"></span>' + entry.html.substring(entry.caret);
			this.rdom.getRoot().innerHTML = html;
		} else {
			this.rdom.getRoot().innerHTML = entry.html;
		}
		this.restoreCaret();
	},
	pushContent: function(ignoreCaret) {
		if(xq.Browser.isTrident && !ignoreCaret && !this.rdom.hasFocus()) return false;
		if(!this.rdom.getCurrentElement()) return false;

		var html = this.rdom.getRoot().innerHTML;
		if(html === (this.queue[this.index] ? this.queue[this.index].html : null)) return false;
		
		var caret = ignoreCaret ? -1 : this.saveCaret();
		
		if(this.queue.length >= this.max) {
			this.queue.shift();
		} else {
			this.index++;
		}
		
		this.queue.splice(this.index, this.queue.length - this.index, {html:html, caret:caret});
		return true;
	},
	clear: function() {
		this.index = -1;
		this.queue = [];
		this.pushContent(true);
	},
	saveCaret: function() {
		if(this.rdom.hasSelection()) return null;
		
		var bookmark = this.rdom.saveSelection();
		var marker = this.rdom.pushMarker();
		
		var str = xq.Browser.isTrident ? '<SPAN class='+marker.className : '<span class="'+marker.className+'"';
		var caret = this.rdom.getRoot().innerHTML.indexOf(str);
		
		this.rdom.popMarker();
		this.rdom.restoreSelection(bookmark);
		
		return caret;
	},
	restoreCaret: function() {
		var marker = this.rdom.$('caret_marker_eh');
		
		if(marker) {
			this.rdom.selectElement(marker, true);
			this.rdom.collapseSelection(false);
			this.rdom.deleteNode(marker);
		} else {
			var node = this.rdom.tree.findForward(this.rdom.getRoot(), function(node) {
				return this.isBlock(node) && !this.hasBlocks(node);
			}.bind(this.rdom.tree));
			this.rdom.selectElement(node, false);
			this.rdom.collapseSelection(false);
			
		}
	}
});

/**
 * @namespace
 */
xq.plugin = {};

/**
 * @requires Xquared.js
 */
xq.plugin.Base = xq.Class(/** @lends xq.plugin.Base.prototype */{
	/**
     * Abstract base class for Xquared plugins.
     * 
     * @constructs
     */
	initialize: function() {},
	
	/**
	 * Loads plugin. Automatically called by xq.Editor.
	 *
	 * @param {xq.Editor} editor Editor instance.
	 */
	load: function(editor) {
		this.editor = editor;
		if(this.isEventListener()) this.editor.addListener(this);
		
		this.onBeforeLoad(this.editor);
		this.editor.addShortcuts(this.getShortcuts() || []);
		this.editor.addAutocorrections(this.getAutocorrections() || []);
		this.editor.addAutocompletions(this.getAutocompletions() || []);
		this.editor.addTemplateProcessors(this.getTemplateProcessors() || []);
		this.editor.addContextMenuHandlers(this.getContextMenuHandlers() || []);
		this.onAfterLoad(this.editor);
	},
	
	/**
	 * Unloads plugin. Automatically called by xq.Editor
	 */
	unload: function() {
		this.onBeforeUnload(this.editor);
		for(var key in this.getShortcuts()) this.editor.removeShortcut(key);
		for(var key in this.getAutocorrections()) this.editor.removeAutocorrection(key);
		for(var key in this.getAutocompletions()) this.editor.removeAutocompletion(key);
		for(var key in this.getTemplateProcessors()) this.editor.removeTemplateProcessor(key);
		for(var key in this.getContextMenuHandlers()) this.editor.removeContextMenuHandler(key);
		this.onAfterUnload(this.editor);
	},
	
	
	
	/**
	 * Always returns false.<br />
	 * <br />
	 * Derived class may override this to make a plugin as a event listener.<br />
	 * Whenever you override this function, you should also implement at least one event handler for xq.Editor.
	 */
	isEventListener: function() {return false},
	
	/**
	 * Callback function. Derived class may override this.
	 */
	onBeforeLoad: function(editor) {},
	
	/**
	 * Callback function. Derived class may override this.
	 */
	onAfterLoad: function(editor) {},
	
	/**
	 * Callback function. Derived class may override this.
	 */
	onBeforeUnload: function(editor) {},
	
	/**
	 * Callback function. Derived class may override this.
	 */
	onAfterUnload: function(editor) {},
	
	/**
	 * Callback function. Derived class may override this.
	 */
	getShortcuts: function() {return [];},
	
	/**
	 * Callback function. Derived class may override this.
	 */
	getAutocorrections: function() {return [];},
	
	/**
	 * Callback function. Derived class may override this.
	 */
	getAutocompletions: function() {return [];},
	
	/**
	 * Callback function. Derived class may override this.
	 */
	getTemplateProcessors: function() {return [];},
	
	/**
	 * Callback function. Derived class may override this.
	 */
	getContextMenuHandlers: function() {return [];}
});
/**
 * @requires Xquared.js
 * @requires rdom/Base.js
 */
xq.RichTable = xq.Class(/** @lends xq.RichTable.prototype */{
	/**
	 * TODO: Add description
	 *
	 * @constructs
	 */
	initialize: function(rdom, table) {
		xq.addToFinalizeQueue(this);

		this.rdom = rdom;
		this.table = table;
	},
	insertNewRowAt: function(tr, where) {
		var row = this.rdom.createElement("TR");
		var cells = tr.cells;
		for(var i = 0; i < cells.length; i++) {
			var cell = this.rdom.createElement(cells[i].nodeName);
			this.rdom.correctEmptyElement(cell);
			row.appendChild(cell);
		}
		return this.rdom.insertNodeAt(row, tr, where);
	},
	insertNewCellAt: function(cell, where) {
		// collect cells;
		var cells = [];
		var x = this.getXIndexOf(cell);
		var y = 0;
		while(true) {
			var cur = this.getCellAt(x, y);
			if(!cur) break;
			cells.push(cur);
			y++;
		}
		
		// insert new cells
		for(var i = 0; i < cells.length; i++) {
			var cell = this.rdom.createElement(cells[i].nodeName);
			this.rdom.correctEmptyElement(cell);
			this.rdom.insertNodeAt(cell, cells[i], where);
		}
	},
	deleteRow: function(tr) {
		return this.rdom.removeBlock(tr);
	},
	deleteCell: function(cell) {
		if(!cell.previousSibling && !cell.nextSibling) {
			this.rdom.deleteNode(this.table);
			return;
		}
		
		// collect cells;
		var cells = [];
		var x = this.getXIndexOf(cell);
		var y = 0;
		while(true) {
			var cur = this.getCellAt(x, y);
			if(!cur) break;
			cells.push(cur);
			y++;
		}
		
		for(var i = 0; i < cells.length; i++) {
			this.rdom.deleteNode(cells[i]);
		}
	},
	getPreviousCellOf: function(cell) {
		if(cell.previousSibling) return cell.previousSibling;
		var adjRow = this.getPreviousRowOf(cell.parentNode);
		if(adjRow) return adjRow.lastChild;
		return null;
	},
	getNextCellOf: function(cell) {
		if(cell.nextSibling) return cell.nextSibling;
		var adjRow = this.getNextRowOf(cell.parentNode);
		if(adjRow) return adjRow.firstChild;
		return null;
	},
	getPreviousRowOf: function(row) {
		if(row.previousSibling) return row.previousSibling;
		var rowContainer = row.parentNode;
		if(rowContainer.previousSibling && rowContainer.previousSibling.lastChild) return rowContainer.previousSibling.lastChild;
		return null;
	},
	getNextRowOf: function(row) {
		if(row.nextSibling) return row.nextSibling;
		var rowContainer = row.parentNode;
		if(rowContainer.nextSibling && rowContainer.nextSibling.firstChild) return rowContainer.nextSibling.firstChild;
		return null;
	},
	getAboveCellOf: function(cell) {
		var row = this.getPreviousRowOf(cell.parentNode);
		if(!row) return null;
		
		var x = this.getXIndexOf(cell);
		return row.cells[x];
	},
	getBelowCellOf: function(cell) {
		var row = this.getNextRowOf(cell.parentNode);
		if(!row) return null;
		
		var x = this.getXIndexOf(cell);
		return row.cells[x];
	},
	getXIndexOf: function(cell) {
		var row = cell.parentNode;
		for(var i = 0; i < row.cells.length; i++) {
			if(row.cells[i] === cell) return i;
		}
		
		return -1;
	},
	getYIndexOf: function(cell) {
		var y = -1;
		
		// find y
		var group = row.parentNode;
		for(var i = 0; i <group.rows.length; i++) {
			if(group.rows[i] === row) {
				y = i;
				break;
			}
		}
		if(this.hasHeadingAtTop() && group.nodeName === "TBODY") y = y + 1;
		
		return y;
	},
	/**
	 * TODO: Not used. Delete or not?
	 */
	getLocationOf: function(cell) {
		var x = this.getXIndexOf(cell);
		var y = this.getYIndexOf(cell);
		return {x:x, y:y};
	},
	getCellAt: function(col, row) {
		var row = this.getRowAt(row);
		return (row && row.cells.length > col) ? row.cells[col] : null;
	},
	getRowAt: function(index) {
		if(this.hasHeadingAtTop()) {
			return index === 0 ? this.table.tHead.rows[0] : this.table.tBodies[0].rows[index - 1];
		} else {
			var rows = this.table.tBodies[0].rows;
			return (rows.length > index) ? rows[index] : null;
		}
	},
	getDom: function() {
		return this.table;
	},
	hasHeadingAtTop: function() {
		return !!(this.table.tHead && this.table.tHead.rows[0]);
	},
	hasHeadingAtLeft: function() {
		return this.table.tBodies[0].rows[0].cells[0].nodeName === "TH";
	},
	correctEmptyCells: function() {
		var cells = xq.$A(this.table.getElementsByTagName("TH"));
		var tds = xq.$A(this.table.getElementsByTagName("TD"));
		for(var i = 0; i < tds.length; i++) {
			cells.push(tds[i]);
		}
		
		for(var i = 0; i < cells.length; i++) {
			if(this.rdom.isEmptyBlock(cells[i])) this.rdom.correctEmptyElement(cells[i])
		}
	}
});

xq.RichTable.create = function(rdom, cols, rows, headerPositions) {
	if(["t", "tl", "lt"].indexOf(headerPositions) !== -1) var headingAtTop = true
	if(["l", "tl", "lt"].indexOf(headerPositions) !== -1) var headingAtLeft = true

	var sb = []
	sb.push('<table class="datatable">')
	
	// thead
	if(headingAtTop) {
		sb.push('<thead><tr>')
		for(var i = 0; i < cols; i++) sb.push('<th></th>')
		sb.push('</tr></thead>')
		rows -= 1
	}
		
	// tbody
	sb.push('<tbody>')
	for(var i = 0; i < rows; i++) {
		sb.push('<tr>')
		
		for(var j = 0; j < cols; j++) {
			if(headingAtLeft && j === 0) {
				sb.push('<th></th>')
			} else {
				sb.push('<td></td>')
			}
		}
		
		sb.push('</tr>')
	}
	sb.push('</tbody>')
	
	sb.push('</table>')
	
	// create DOM element
	var container = rdom.createElement("div");
	container.innerHTML = sb.join("");
	
	// correct empty cells and return
	var rtable = new xq.RichTable(rdom, container.firstChild);
	rtable.correctEmptyCells();
	return rtable;
}
/**
 * @namespace UI Controls
 * 
 * @requires Xquared.js
 */
xq.ui = {};
/**
 * @namespace UI Controls
 * 
 * @requires Xquared.js
 * @requires ui/Base.js
 */
xq.ui.FormDialog = xq.Class(/** @lends xq.ui.FormDialog.prototype */ {
	/**
     * Displays given HTML form as a dialog.
     * 
     * @constructs
     * @param {xq.Editor} xed Dialog owner.
     * @param {String} html HTML string which contains FORM.
     * @param {Function} [onLoadHandler] callback function to be called when the form is loaded.
     * @param {Function} [onCloseHandler] callback function to be called when the form is closed.
	 */
	initialize: function(xed, html, onLoadHandler, onCloseHandler) {
		xq.addToFinalizeQueue(this);

		this.xed = xed;
		this.html = html;
		this.onLoadHandler = onLoadHandler || function() {};
		this.onCloseHandler = onCloseHandler || function() {};
		this.form = null;
	},
	
	/**
	 * Shows dialog
	 *
	 * @param {Object} [options] collection of options
	 */
	show: function(options) {
		options = options || {};
		options.position = options.position || 'centerOfWindow';
		options.mode = options.mode || 'modal';
		options.cancelOnEsc = options.cancelOnEsc || true;
		
		var self = this;
		
		// create and append container
		var container = document.createElement('DIV');
		container.style.display = 'none';
		document.body.appendChild(container);
		
		// initialize form
		container.innerHTML = this.html;
		this.form = container.getElementsByTagName('FORM')[0];
		
		this.form.onsubmit = function() {
			self.onCloseHandler(xq.serializeForm(this));
			self.close();
			return false;
		};
		
		var cancelButton = xq.getElementsByClassName(this.form, 'cancel')[0];
		cancelButton.onclick = function() {
			self.onCloseHandler();
			self.close();
		};
		
		if(options.mode === 'modal') {
			this.dimmed = document.createElement('DIV');
			this.dimmed.style.position = 'absolute';
			this.dimmed.style.backgroundColor = 'black';
			this.dimmed.style.opacity = 0.5;
			this.dimmed.style.filter = 'alpha(opacity=50)';
			this.dimmed.style.zIndex=902;
			this.dimmed.style.top='0px';
			this.dimmed.style.left='0px';
			document.body.appendChild(this.dimmed);
			
			this.resizeDimmedDiv = function(e) {
				this.dimmed.style.display='none';
				this.dimmed.style.width=document.documentElement.scrollWidth+'px';
				this.dimmed.style.height=document.documentElement.scrollHeight+'px';
				this.dimmed.style.display='block';
			}.bind(this);
			
			xq.observe(window, 'resize', this.resizeDimmedDiv);
			
			this.resizeDimmedDiv();
		}
		
		// append dialog
		document.body.appendChild(this.form);
		container.parentNode.removeChild(container);
		
		// place dialog to center of window
		this.setPosition(options.position);
		
		// give focus
		var elementToFocus = xq.getElementsByClassName(this.form, 'initialFocus');
		if(elementToFocus.length > 0) elementToFocus[0].focus();
		
		// handle cancelOnEsc option
		if(options.cancelOnEsc) {
			xq.observe(this.form, 'keydown', function(e) {
				if(e.keyCode === 27) {
					this.onCloseHandler();
					this.close();
				}
			}.bind(this));
		}
		
		this.onLoadHandler(this);
	},
	
	/**
	 * Closes dialog
	 */
	close: function() {
		this.form.parentNode.removeChild(this.form);
		
		if(this.dimmed) {
			this.dimmed.parentNode.removeChild(this.dimmed);
			this.dimmed = null;
			xq.stopObserving(window, 'resize', this.resizeDimmedDiv);
			this.resizeDimmedDiv = null;
		}
	},
	
	/**
	 * Sets position of dialog
	 *
	 * @param {String} target "centerOfWindow" or "centerOfEditor"
	 */
	setPosition: function(target) {
		var targetElement = null;
		var left = 0;
		var top = 0;
		
		if(target === 'centerOfWindow') {
			targetElement = document.documentElement;
			left += targetElement.scrollLeft;
			top += targetElement.scrollTop;
		} else if(target === 'centerOfEditor') {
			targetElement = this.xed.getCurrentEditMode() == 'wysiwyg' ? this.xed.wysiwygEditorDiv : this.xed.sourceEditorDiv;
			var o = targetElement;
			do {
				left += o.offsetLeft;
				top += o.offsetTop;
			} while(o = o.offsetParent)
		} else if(target === 'nearbyCaret') {
			throw "Not implemented yet";
		} else {
			throw "Invalid argument: " + target;
		}
		
		var targetWidth = targetElement.clientWidth;
		var targetHeight = targetElement.clientHeight;
		var dialogWidth = this.form.clientWidth;
		var dialogHeight = this.form.clientHeight;
		
		left += parseInt((targetWidth - dialogWidth) / 2);
		top += parseInt((targetHeight - dialogHeight) / 2);
		
		this.form.style.left = left + "px";
		this.form.style.top = top + "px";
	}
})



xq.ui.QuickSearchDialog = xq.Class(/** @lends xq.ui.QuickSearchDialog.prototype */ {
	/**
     * Displays quick search dialog
     * 
     * @constructs
     * @param {xq.Editor} xed Dialog owner.
     * @param {Object} param Parameters.
	 */
	initialize: function(xed, param) {
		xq.addToFinalizeQueue(this);
		this.xed = xed;
		
		this.rdom = xq.rdom.Base.createInstance();
		
		this.param = param;
		if(!this.param.renderItem) this.param.renderItem = function(item) {
			return this.rdom.getInnerText(item);
		}.bind(this);
		
		this.container = null;
	},
	
	getQuery: function() {
		if(!this.container) return "";
		return this._getInputField().value;
	},
	
	onSubmit: function(e) {
		if(this.matchCount() > 0) {
			this.param.onSelect(this.xed, this.list[this._getSelectedIndex()]);
		}
		
		this.close();
		xq.stopEvent(e);
		return false;
	},
	
	onCancel: function(e) {
		if(this.param.onCancel) this.param.onCancel(this.xed);
		this.close();
	},
	
	onBlur: function(e) {
		// @WORKAROUND: Ugly
		setTimeout(function() {this.onCancel(e)}.bind(this), 400);
	},
	
	onKey: function(e) {
		var esc = new xq.Shortcut("ESC");
		var enter = new xq.Shortcut("ENTER");
		var up = new xq.Shortcut("UP");
		var down = new xq.Shortcut("DOWN");
		
		if(esc.matches(e)) {
			this.onCancel(e);
		} else if(enter.matches(e)) {
			this.onSubmit(e);
		} else if(up.matches(e)) {
			this._moveSelectionUp();
		} else if(down.matches(e)) {
			this._moveSelectionDown();
		} else {
			this.updateList();
		}
	},
	
	onClick: function(e) {
		var target = e.srcElement || e.target;
		if(target.nodeName === "LI") {
			
			var index = this._getIndexOfLI(target);
			this.param.onSelect(this.xed, this.list[index]);
		}
	},
	
	onList: function(list) {
		this.list = list;
		this.renderList(list);
	},
	
	updateList: function() {
		window.setTimeout(function() {
			this.param.listProvider(this.getQuery(), this.xed, this.onList.bind(this));
		}.bind(this), 0);
	},
	
	renderList: function(list) 
	{
		var ol = this._getListContainer();
		ol.innerHTML = "";
		
		for(var i = 0; i < list.length; i++) {
			var li = this.rdom.createElement('LI');
			li.innerHTML = this.param.renderItem(list[i]);
			ol.appendChild(li);
		}
		
		if(ol.hasChildNodes()) {
			ol.firstChild.className = "selected";
		}
	},
	
	show: function() {
		if(!this.container) this.container = this._create();
		
		var dialog = this.rdom.insertNodeAt(this.container, this.rdom.getRoot(), "end");
		this.setPosition('centerOfEditor');
		this.updateList();
		this.focus();
	},
	
	close: function() {
		this.rdom.deleteNode(this.container);
	},
	
	focus: function() {
		this._getInputField().focus();
	},
	
	setPosition: function(target) {
		var targetElement = null;
		var left = 0;
		var top = 0;
		
		if(target === 'centerOfWindow') {
			left += targetElement.scrollLeft;
			top += targetElement.scrollTop;
			targetElement = document.documentElement;
		} else if(target === 'centerOfEditor') {
			targetElement = this.xed.getCurrentEditMode() == 'wysiwyg' ? this.xed.wysiwygEditorDiv : this.xed.sourceEditorDiv;
			var o = targetElement;
			do {
				left += o.offsetLeft;
				top += o.offsetTop;
			} while(o = o.offsetParent)
		} else if(target === 'nearbyCaret') {
			throw "Not implemented yet";
		} else {
			throw "Invalid argument: " + target;
		}
		
		var targetWidth = targetElement.clientWidth;
		var targetHeight = targetElement.clientHeight;
		var dialogWidth = this.container.clientWidth;
		var dialogHeight = this.container.clientHeight;
		
		left += parseInt((targetWidth - dialogWidth) / 2);
		top += parseInt((targetHeight - dialogHeight) / 2);
		
		this.container.style.left = left + "px";
		this.container.style.top = top + "px";
	},
	
	matchCount: function() {
		return this.list ? this.list.length : 0;
	},
	
	_create: function() {
		// make container
		var container = this.rdom.createElement("DIV");
		container.className = "xqQuickSearch";
		
		// make title
		if(this.param.title) {
			var title = this.rdom.createElement("H1");
			title.innerHTML = this.param.title;
			container.appendChild(title);
		}
		
		// make input field
		var inputWrapper = this.rdom.createElement("DIV");
		inputWrapper.className = "input";
		var form = this.rdom.createElement("FORM");
		var input = this.rdom.createElement("INPUT");
		input.type = "text";
		input.value = "";
    	form.appendChild(input);
		inputWrapper.appendChild(form);
		container.appendChild(inputWrapper);
		
		// make list
		var list = this.rdom.createElement("OL");

	    xq.observe(input, 'blur', this.onBlur.bindAsEventListener(this));
    	xq.observe(input, 'keypress', this.onKey.bindAsEventListener(this));
    	xq.observe(list, 'click', this.onClick.bindAsEventListener(this), true);
    	xq.observe(form, 'submit', this.onSubmit.bindAsEventListener(this));
    	xq.observe(form, 'reset', this.onCancel.bindAsEventListener(this));

		container.appendChild(list);
		return container;
	},
	
	_getInputField: function() {
		return this.container.getElementsByTagName('INPUT')[0];
	},
	
	_getListContainer: function() {
		return this.container.getElementsByTagName('OL')[0];
	},
	
	_getSelectedIndex: function() {
		var ol = this._getListContainer();
		for(var i = 0; i < ol.childNodes.length; i++) {
			if(ol.childNodes[i].className === 'selected') return i;
		}
	},
	
	_getIndexOfLI: function(li) {
		var ol = this._getListContainer();
		for(var i = 0; i < ol.childNodes.length; i++) {
			if(ol.childNodes[i] === li) return i;
		}
	},
	
	_moveSelectionUp: function() {
		var count = this.matchCount();
		if(count === 0) return;
		var index = this._getSelectedIndex();
		var ol = this._getListContainer();
		ol.childNodes[index].className = "";
		
		index--;
		if(index < 0) index = count - 1;
		
		ol.childNodes[index].className = "selected";
	},
	
	_moveSelectionDown: function() {
		var count = this.matchCount();
		if(count === 0) return;
		var index = this._getSelectedIndex();
		var ol = this._getListContainer();
		ol.childNodes[index].className = "";
		
		index++;
		if(index >= count) index = 0;
		
		ol.childNodes[index].className = "selected";
	}
});
/**
 * @requires Xquared.js
 * @requires Browser.js
 * @requires ui/Base.js
 */
xq.ui.Toolbar = xq.Class(/** @lends xq.ui.Toolbar.prototype */{
	/**
	 * TODO: Add description
	 *
     * @constructs
	 */
	initialize: function(xed, container, wrapper, buttonMap, imagePath, structureAndStyleCollector) {
		xq.addToFinalizeQueue(this);
		
		this.xed = xed;
		
		if(typeof container === 'string') {
			container = xq.$(container);
		}
		if(container && container.nodeType !== 1) {
			throw "[container] is not an element";
		}
		
		this.wrapper = wrapper;
		this.doc = this.wrapper.ownerDocument;
		this.buttonMap = buttonMap;
		this.imagePath = imagePath;
		this.structureAndStyleCollector = structureAndStyleCollector;
		
		this.buttons = null;
		this.anchorsCache = [];
		this._scheduledUpdate = null;
		
		if(!container) {
			this.create();
			this._addStyleRules([
				{selector:".xquared div.toolbar", rule:"background-image: url(" + imagePath + "toolbarBg.gif)"},
				{selector:".xquared ul.buttons li", rule:"background-image: url(" + imagePath + "toolbarButtonBg.gif)"},
				{selector:".xquared ul.buttons li.xq_separator", rule:"background-image: url(" + imagePath + "toolbarSeparator.gif)"}
			]);
		} else {
			this.container = container;
		}
	},
	
	finalize: function() {
		for(var i = 0; i < this.anchorsCache.length; i++) {
			// TODO remove dependency to Editor
			this.anchorsCache[i].xed = null;
			this.anchorsCache[i].handler = null;
			this.anchorsCache[i] = null;
		}
	
		this.toolbarAnchorsCache = null;
	},
	
	triggerUpdate: function() {
		if(this._scheduledUpdate) return;
		
		this._scheduledUpdate = window.setTimeout(
			function() {
				this._scheduledUpdate = null;
				var ss = this.structureAndStyleCollector();
				if(ss) this.update(ss);
			}.bind(this), 200
		);
	},
	
	/**
	 * Updates all buttons' status. Override this to customize status L&F. Don't call this function directly. Use triggerUpdate() to call it indirectly.
	 * 
	 * @param {Object} structure and style information. see xq.rdom.Base.collectStructureAndStyle()
	 */
	update: function(info) {
		if(!this.container) return;
		if(!this.buttons) {
			var classNames = [
				"emphasis", "strongEmphasis", "underline", "strike", "superscription", "subscription",
				"justifyLeft", "justifyCenter", "justifyRight", "justifyBoth",
				"unorderedList", "orderedList", "code",
				"paragraph", "heading1", "heading2", "heading3", "heading4", "heading5", "heading6"
			];
			
			this.buttons = {};
			
			for(var i = 0; i < classNames.length; i++) {
				var found = xq.getElementsByClassName(this.container, classNames[i]);
				var button = found && found.length > 0 ? found[0] : null;
				if(button) this.buttons[classNames[i]] = button;
			}
		}
		
		var buttons = this.buttons;
		this._updateButtonStatus('emphasis', info.em);
		this._updateButtonStatus('strongEmphasis', info.strong);
		this._updateButtonStatus('underline', info.underline);
		this._updateButtonStatus('strike', info.strike);
		this._updateButtonStatus('superscription', info.superscription);
		this._updateButtonStatus('subscription', info.subscription);
		
		this._updateButtonStatus('justifyLeft', info.justification === 'left');
		this._updateButtonStatus('justifyCenter', info.justification === 'center');
		this._updateButtonStatus('justifyRight', info.justification === 'right');
		this._updateButtonStatus('justifyBoth', info.justification === 'justify');
		
		this._updateButtonStatus('orderedList', info.list === 'OL');
		this._updateButtonStatus('unorderedList', info.list === 'UL');
		this._updateButtonStatus('code', info.list === 'CODE');
		
		this._updateButtonStatus('paragraph', info.block === 'P');
		this._updateButtonStatus('heading1', info.block === 'H1');
		this._updateButtonStatus('heading2', info.block === 'H2');
		this._updateButtonStatus('heading3', info.block === 'H3');
		this._updateButtonStatus('heading4', info.block === 'H4');
		this._updateButtonStatus('heading5', info.block === 'H5');
		this._updateButtonStatus('heading6', info.block === 'H6');
	},

	/**
	 * Enables all buttons
	 *
	 * @param {Array} [exceptions] array of string containing classnames to exclude
	 */
	enableButtons: function(exceptions) {
		if(!this.container) return;
		
		this._execForAllButtons(exceptions, function(li, exception) {
			li.firstChild.className = !exception ? '' : 'disabled';
		});

		// @WORKAROUND: Image icon disappears without following code:
		if(xq.Browser.isIE6) {
			this.container.style.display = 'none';
			setTimeout(function() {this.container.style.display = 'block';}.bind(this), 0);
		}
	},
	
	/**
	 * Disables all buttons
	 *
	 * @param {Array} [exceptions] array of string containing classnames to exclude
	 */
	disableButtons: function(exceptions) {
		this._execForAllButtons(exceptions, function(li, exception) {
			li.firstChild.className = exception ? '' : 'disabled';
		});
	},
	
	/**
	 * Creates toolbar element
	 */
	create: function() {
		// outmost container
		this.container = this.doc.createElement('div');
		this.container.className = 'toolbar';
		
		// button container
		var buttons = this.doc.createElement('ul');
		buttons.className = 'buttons';
		this.container.appendChild(buttons);
		
		// Generate buttons from map and append it to button container
		for(var i = 0; i < this.buttonMap.length; i++) {
			for(var j = 0; j < this.buttonMap[i].length; j++) {
				var buttonConfig = this.buttonMap[i][j];
				
				var li = this.doc.createElement('li');
				buttons.appendChild(li);
				li.className = buttonConfig.className;
				
				var span = this.doc.createElement('span');
				li.appendChild(span);
				
				if(buttonConfig.handler) {
					this._createButton(buttonConfig, span);
				} else {
					this._createDropdown(buttonConfig, span);
				}

				if(j === 0 && i !== 0) li.className += ' xq_separator';
			}
		}
		
		this.wrapper.appendChild(this.container);
	},

	_createButton: function(buttonConfig, span) {
		var a = this.doc.createElement('a');
		span.appendChild(a);
		a.href = '#';
		a.title = buttonConfig.title;
		a.handler = buttonConfig.handler;
		
		this.anchorsCache.push(a);
		
		xq.observe(a, 'mousedown', xq.cancelHandler);
		xq.observe(a, 'click', this._clickHandler.bindAsEventListener(this));

		var img = this.doc.createElement('img');
		a.appendChild(img);
		img.src = this.imagePath + buttonConfig.className + '.gif';
	},
	
	_createDropdown: function(buttonConfig, span) {
		var select = this.doc.createElement('select');
		select.handlers = buttonConfig.list;
		var xed = this.xed;
		
		xq.observe(select, 'change', function(e) {
			var src = e.target || e.srcElement;
			if(src.value === "-1") {
				src.selectedIndex = 0;
				return true;
			}
			
			var handler = src.handlers[src.value].handler;
			xed.focus();
			var stop = (typeof handler === "function") ? handler(this) : eval(handler);
			src.selectedIndex = 0;
			
			if(stop) {
				xq.stopEvent(e);
				return false;
			} else {
				return true;
			}
		});
		
		var option = this.doc.createElement('option');
		option.innerHTML = buttonConfig.title;
		option.value = -1;
		select.appendChild(option);
		
		option = this.doc.createElement('option');
		option.innerHTML = '----';
		option.value = -1;
		select.appendChild(option);
		
		for(var i = 0; i < buttonConfig.list.length; i++) {
			option = this.doc.createElement('option');
			option.innerHTML = buttonConfig.list[i].title;
			option.value = i;
			
			select.appendChild(option);
		}
		span.appendChild(select);
	},
	
	_clickHandler: function(e) {
		var src = e.target || e.srcElement;
		while(src.nodeName !== "A") src = src.parentNode;
		
		if(xq.hasClassName(src.parentNode, 'disabled') || xq.hasClassName(this.container, 'disabled')) {
			xq.stopEvent(e);
			return false;
		}
		
		var handler = src.handler;
		var xed = this.xed;
		xed.focus();
		if(typeof handler === "function") {
			handler(this);
		} else {
			eval(handler);
		}
		
		xq.stopEvent(e);
		return false;
	},

	_updateButtonStatus: function(className, selected) {
		var button = this.buttons[className];
		if(button) {
			var newClassName = selected ? 'selected' : '';
			var target = button.firstChild.firstChild;
			if(target.className !== newClassName) target.className = newClassName;
		}
	},
	
	_execForAllButtons: function(exceptions, exec) {
		if(!this.container) return;
		exceptions = exceptions || [];
		
		var lis = this.container.getElementsByTagName('LI');
		for(var i = 0; i < lis.length; i++) {
			var className = lis[i].className.split(" ").find(function(name) {return name !== 'xq_separator'});
			var exception = exceptions.indexOf(className) !== -1;
			exec(lis[i], exception);
		}
	},
	
	_addStyleRules: function(rules) {
		if(!this.dynamicStyle) {
			if(xq.Browser.isTrident) {
			    this.dynamicStyle = this.doc.createStyleSheet();
			} else {
	    		var style = this.doc.createElement('style');
	    		this.doc.body.appendChild(style);
		    	this.dynamicStyle = xq.$A(this.doc.styleSheets).last();
			}
		}
		
		for(var i = 0; i < rules.length; i++) {
			var rule = rules[i];
			if(xq.Browser.isTrident) {
				this.dynamicStyle.addRule(rules[i].selector, rules[i].rule);
			} else {
		    	this.dynamicStyle.insertRule(rules[i].selector + " {" + rules[i].rule + "}", this.dynamicStyle.cssRules.length);
	    	}
		}
	}
});
if(!xq) xq = {};
if(!xq.ui_templates) xq.ui_templates = {};

xq.ui_templates.basicColorPickerDialog='<form action="#" class="xqFormDialog xqBasicColorPickerDialog">\n		<div>\n			<label>\n				<input type="radio" class="initialFocus" name="color" value="black" checked="checked" />\n				<span style="color: black;">Black</span>\n			</label>\n			<label>\n				<input type="radio" name="color" value="red" />\n				<span style="color: red;">Red</span>\n			</label>\n				<input type="radio" name="color" value="yellow" />\n				<span style="color: yellow;">Yellow</span>\n			</label>\n			</label>\n				<input type="radio" name="color" value="pink" />\n				<span style="color: pink;">Pink</span>\n			</label>\n			<label>\n				<input type="radio" name="color" value="blue" />\n				<span style="color: blue;">Blue</span>\n			</label>\n			<label>\n				<input type="radio" name="color" value="green" />\n				<span style="color: green;">Green</span>\n			</label>\n			\n			<input type="submit" value="Ok" />\n			<input type="button" class="cancel" value="Cancel" />\n		</div>\n	</form>';
if(!xq) xq = {};
if(!xq.ui_templates) xq.ui_templates = {};

xq.ui_templates.basicIFrameDialog='<form action="#" class="xqFormDialog xqBasicIFrameDialog">\n		<table>\n			<tr>\n				<td>IFrame src:</td>\n				<td><input type="text" class="initialFocus" name="p_src" size="36" value="http://" /></td>\n			</tr>\n			<tr>\n				<td>Width:</td>\n				<td><input type="text" name="p_width" size="6" value="320" /></td>\n			</tr>\n			<tr>\n				<td>Height:</td>\n				<td><input type="text" name="p_height" size="6" value="200" /></td>\n			</tr>\n			<tr>\n				<td>Frame border:</td>\n				<td><select name="p_frameborder">\n					<option value="0" selected="selected">No</option>\n					<option value="1">Yes</option>\n				</select></td>\n			</tr>\n			<tr>\n				<td>Scrolling:</td>\n				<td><select name="p_scrolling">\n					<option value="0">No</option>\n					<option value="1" selected="selected">Yes</option>\n				</select></td>\n			</tr>\n			<tr>\n				<td>ID(optional):</td>\n				<td><input type="text" name="p_id" size="24" value="" /></td>\n			</tr>\n			<tr>\n				<td>Class(optional):</td>\n				<td><input type="text" name="p_class" size="24" value="" /></td>\n			</tr>\n		</table>\n		<p>\n			<input type="submit" value="Ok" />\n			<input type="button" class="cancel" value="Cancel" />\n		</p>\n	</form>';
if(!xq) xq = {};
if(!xq.ui_templates) xq.ui_templates = {};

xq.ui_templates.basicLinkDialog='<form action="#" class="xqFormDialog xqBasicLinkDialog">\n		<h3>Link</h3>\n		<div>\n			<input type="text" class="initialFocus" name="text" value="" />\n			<input type="text" name="url" value="http://" />\n			\n			<input type="submit" value="Ok" />\n			<input type="button" class="cancel" value="Cancel" />\n		</div>\n	</form>';
if(!xq) xq = {};
if(!xq.ui_templates) xq.ui_templates = {};

xq.ui_templates.basicMovieDialog='<form action="#" class="xqFormDialog xqBasicMovieDialog">\n		<table>\n			<tr>\n				<td>Movie OBJECT tag:</td>\n				<td><input type="text" class="initialFocus" name="html" size="36" value="" /></td>\n			</tr>\n		</table>\n		<p>\n			<input type="submit" value="Ok" />\n			<input type="button" class="cancel" value="Cancel" />\n		</p>\n	</form>';
if(!xq) xq = {};
if(!xq.ui_templates) xq.ui_templates = {};

xq.ui_templates.basicScriptDialog='<form action="#" class="xqFormDialog xqBasicScriptDialog">\n		<table>\n			<tr>\n				<td>Script URL:</td>\n				<td><input type="text" class="initialFocus" name="url" size="36" value="http://" /></td>\n			</tr>\n		</table>\n		<p>\n			<input type="submit" value="Ok" />\n			<input type="button" class="cancel" value="Cancel" />\n		</p>\n	</form>';

/**
 * @requires Xquared.js
 */
xq.Shortcut = xq.Class(/** @lends xq.Shortcut.prototype */{
	/**
	 * Interpretes keyboard event.
	 *
     * @constructs
	 */
	initialize: function(keymapOrExpression) {
		xq.addToFinalizeQueue(this);
		this.keymap = keymapOrExpression;
	},
	matches: function(e) {
		if(typeof this.keymap === "string") this.keymap = xq.Shortcut.interprete(this.keymap).keymap;
		
		// check for key code
		var which = xq.Browser.isGecko && xq.Browser.isMac ? (e.keyCode + "_" + e.charCode) : e.keyCode;
		var keyMatches =
			(this.keymap.which === which) ||
			(this.keymap.which === 32 && which === 25); // 25 is SPACE in Type-3 keyboard.
		if(!keyMatches) return false;
		
		// check for modifier
		if(typeof e.metaKey === "undefined") e.metaKey = false;
		
		var modifierMatches = 
			(this.keymap.shiftKey === e.shiftKey || typeof this.keymap.shiftKey === "undefined") &&
			(this.keymap.altKey === e.altKey || typeof this.keymap.altKey === "undefined") &&
			(this.keymap.ctrlKey === e.ctrlKey || typeof this.keymap.ctrlKey === "undefined") &&
			// Webkit turns on meta key flag when alt key is pressed
			(xq.Browser.isWin && xq.Browser.isWebkit || this.keymap.metaKey === e.metaKey || typeof this.keymap.metaKey === "undefined")
		
		return modifierMatches;
	}
});

xq.Shortcut.interprete = function(expression) {
	expression = expression.toUpperCase();
	
	var which = xq.Shortcut._interpreteWhich(expression.split("+").pop());
	var ctrlKey = xq.Shortcut._interpreteModifier(expression, "CTRL");
	var altKey = xq.Shortcut._interpreteModifier(expression, "ALT");
	var shiftKey = xq.Shortcut._interpreteModifier(expression, "SHIFT");
	var metaKey = xq.Shortcut._interpreteModifier(expression, "META");
	
	var keymap = {};
	
	keymap.which = which;
	if(typeof ctrlKey !== "undefined") keymap.ctrlKey = ctrlKey;
	if(typeof altKey !== "undefined") keymap.altKey = altKey;
	if(typeof shiftKey !== "undefined") keymap.shiftKey = shiftKey;
	if(typeof metaKey !== "undefined") keymap.metaKey = metaKey;
	
	return new xq.Shortcut(keymap);
}

xq.Shortcut._interpreteModifier = function(expression, modifierName) {
	return expression.match("\\(" + modifierName + "\\)") ?
		undefined :
			expression.match(modifierName) ?
			true : false;
}
xq.Shortcut._interpreteWhich = function(keyName) {
	var which = keyName.length === 1 ?
		((xq.Browser.isMac && xq.Browser.isGecko) ? "0_" + keyName.toLowerCase().charCodeAt(0) : keyName.charCodeAt(0)) :
		xq.Shortcut._keyNames[keyName];
	
	if(typeof which === "undefined") throw "Unknown special key name: [" + keyName + "]"
	
	return which;
}
xq.Shortcut._keyNames =
	xq.Browser.isMac && xq.Browser.isGecko ?
	{
		BACKSPACE: "8_0",
		TAB: "9_0",
		RETURN: "13_0",
		ENTER: "13_0",
		ESC: "27_0",
		SPACE: "0_32",
		LEFT: "37_0",
		UP: "38_0",
		RIGHT: "39_0",
		DOWN: "40_0",
		DELETE: "46_0",
		HOME: "36_0",
		END: "35_0",
		PAGEUP: "33_0",
		PAGEDOWN: "34_0",
		COMMA: "0_44",
		HYPHEN: "0_45",
		EQUAL: "0_61",
		PERIOD: "0_46",
		SLASH: "0_47",
		F1: "112_0",
		F2: "113_0",
		F3: "114_0",
		F4: "115_0",
		F5: "116_0",
		F6: "117_0",
		F7: "118_0",
		F8: "119_0"
	}
	:
	{
		BACKSPACE: 8,
		TAB: 9,
		RETURN: 13,
		ENTER: 13,
		ESC: 27,
		SPACE: 32,
		LEFT: 37,
		UP: 38,
		RIGHT: 39,
		DOWN: 40,
		DELETE: 46,
		HOME: 36,
		END: 35,
		PAGEUP: 33,
		PAGEDOWN: 34,
		COMMA: 188,
		HYPHEN: xq.Browser.isTrident ? 189 : 109,
		EQUAL: xq.Browser.isTrident ? 187 : 61,
		PERIOD: 190,
		SLASH: 191,
		F1:112,
		F2:113,
		F3:114,
		F4:115,
		F5:116,
		F6:117,
		F7:118,
		F8:119,
		F9:120,
		F10:121,
		F11:122,
		F12:123
	}

/**
 * @requires Xquared.js
 * @requires Browser.js
 * @requires Timer.js
 * @requires rdom/Factory.js
 * @requires validator/Factory.js
 * @requires EditHistory.js
 * @requires plugin/Base.js
 * @requires RichTable.js
 * @requires ui/Control.js
 * @requires ui/Toolbar.js
 * @requires ui/_templates.js
 * @requires Shortcut.js
 */
xq.Editor = xq.Class(/** @lends xq.Editor.prototype */{
	/**
	 * Initialize editor but it doesn't automatically start designMode. setEditMode should be called after initialization.
	 *
     * @constructs
	 * @param {Object} contentElement TEXTAREA to be replaced with editable area, or DOM ID string for TEXTAREA.
	 * @param {Object} toolbarContainer HTML element which contains toolbar icons, or DOM ID string.
	 */
	initialize: function(contentElement, toolbarContainer) {
		xq.addToFinalizeQueue(this);
		
		if(typeof contentElement === 'string') {
			contentElement = xq.$(contentElement);
		}
		if(!contentElement) {
			throw "[contentElement] is null";
		}
		if(contentElement.nodeName !== 'TEXTAREA') {
			throw "[contentElement] is not a TEXTAREA";
		}
		
		xq.asEventSource(this, "Editor", ["StartInitialization", "Initialized", "ElementChanged", "BeforeEvent", "AfterEvent", "CurrentContentChanged", "StaticContentChanged", "CurrentEditModeChanged"]);
		
		/**
		 * Editor's configuration.
		 * @type object
		 */
		this.config = {};
		
		/**
		 * Automatically gives initial focus.
		 * @type boolean
		 */
		this.config.autoFocusOnInit = false;
		
		/**
		 * Makes links clickable.
		 * @type boolean
		 */
		this.config.enableLinkClick = false;
		
		/**
		 * Changes mouse cursor to pointer when the cursor is on a link.
		 * @type boolean
		 */
		this.config.changeCursorOnLink = false;
		
		/**
		 * Generates default toolbar if there's no toolbar provided.
		 * @type boolean
		 */
		this.config.generateDefaultToolbar = true;
		
		
		this.config.defaultToolbarButtonGroups = {
			"color": [
 				{className:"foregroundColor", title:"Foreground color", handler:"xed.handleForegroundColor()"},
				{className:"backgroundColor", title:"Background color", handler:"xed.handleBackgroundColor()"}
 			],
 			"font": [
				{className:"fontFace", title:"Font face", list:[
                    {title:"Arial", handler:"xed.handleFontFace('Arial')"},
                    {title:"Helvetica", handler:"xed.handleFontFace('Helvetica')"},
                    {title:"Serif", handler:"xed.handleFontFace('Serif')"},
                    {title:"Tahoma", handler:"xed.handleFontFace('Tahoma')"},
                    {title:"Verdana", handler:"xed.handleFontFace('Verdana')"}
				]},
				{className:"fontSize", title:"Font size", list:[
                    {title:"1", handler:"xed.handleFontSize('1')"},
                    {title:"2", handler:"xed.handleFontSize('2')"},
                    {title:"3", handler:"xed.handleFontSize('3')"},
                    {title:"4", handler:"xed.handleFontSize('4')"},
                    {title:"5", handler:"xed.handleFontSize('5')"},
                    {title:"6", handler:"xed.handleFontSize('6')"}
				]}
			],
			"link": [
			    {className:"link", title:"Link", handler:"xed.handleLink()"},
			    {className:"removeLink", title:"Remove link", handler:"xed.handleRemoveLink()"}
			],
			"style": [
				{className:"strongEmphasis", title:"Strong emphasis", handler:"xed.handleStrongEmphasis()"},
				{className:"emphasis", title:"Emphasis", handler:"xed.handleEmphasis()"},
				{className:"underline", title:"Underline", handler:"xed.handleUnderline()"},
				{className:"strike", title:"Strike", handler:"xed.handleStrike()"},
				{className:"superscription", title:"Superscription", handler:"xed.handleSuperscription()"},
				{className:"subscription", title:"Subscription", handler:"xed.handleSubscription()"},
				{className:"removeFormat", title:"Remove format", handler:"xed.handleRemoveFormat()"}
			],
			"justification": [
  				{className:"justifyLeft", title:"Justify left", handler:"xed.handleJustify('left')"},
				{className:"justifyCenter", title:"Justify center", handler:"xed.handleJustify('center')"},
				{className:"justifyRight", title:"Justify right", handler:"xed.handleJustify('right')"},
				{className:"justifyBoth", title:"Justify both", handler:"xed.handleJustify('both')"}
			],
			"indentation": [
				{className:"indent", title:"Indent", handler:"xed.handleIndent()"},
				{className:"outdent", title:"Outdent", handler:"xed.handleOutdent()"}
  			],
  			"block": [
				{className:"paragraph", title:"Paragraph", handler:"xed.handleApplyBlock('P')"},
				{className:"heading1", title:"Heading 1", handler:"xed.handleApplyBlock('H1')"},
				{className:"blockquote", title:"Blockquote", handler:"xed.handleApplyBlock('BLOCKQUOTE')"},
				{className:"code", title:"Code", handler:"xed.handleList('OL', 'code')"},
				{className:"division", title:"Division", handler:"xed.handleApplyBlock('DIV')"},
				{className:"unorderedList", title:"Unordered list", handler:"xed.handleList('UL')"},
				{className:"orderedList", title:"Ordered list", handler:"xed.handleList('OL')"}
  			],
  			"insert": [
				{className:"table", title:"Table", handler:"xed.handleTable(4, 4,'tl')"},
				{className:"separator", title:"Separator", handler:"xed.handleSeparator()"}
  			]
		};
		
		/**
		 * Button map for default toolbar
		 * @type Object
		 */
		this.config.defaultToolbarButtonMap = [
		    this.config.defaultToolbarButtonGroups.color,
		    this.config.defaultToolbarButtonGroups.font,
		    this.config.defaultToolbarButtonGroups.link,
		    this.config.defaultToolbarButtonGroups.style,
		    this.config.defaultToolbarButtonGroups.justification,
		    this.config.defaultToolbarButtonGroups.indentation,
		    this.config.defaultToolbarButtonGroups.block,
		    this.config.defaultToolbarButtonGroups.insert,
			[
				{className:"html", title:"Edit source", handler:"xed.toggleSourceAndWysiwygMode()"}
			],
			[
				{className:"undo", title:"Undo", handler:"xed.handleUndo()"},
				{className:"redo", title:"Redo", handler:"xed.handleRedo()"}
			]
		];
		
		/**
		 * Image path for default toolbar.
		 * @type String
		 */
		this.config.imagePathForDefaultToolbar = '../images/toolbar/';
		
		/**
		 * Image path for content.
		 * @type String
		 */
		this.config.imagePathForContent = '../images/content/';
		
		/**
		 * Widget Container path.
		 * @type String
		 */
		this.config.widgetContainerPath = 'widget_container.html';
		
		/**
		 * Array of URL containig CSS for WYSIWYG area.
		 * @type Array
		 */
		this.config.contentCssList = ['../stylesheets/xq_contents.css'];
		
		/**
		 * URL Validation mode. One or "relative", "host_relative", "absolute", "browser_default"
		 * @type String
		 */
		this.config.urlValidationMode = 'absolute';
		
		/**
		 * Turns off validation in source editor.<br />
		 * Note that the validation will be performed regardless of this value when you switching edit mode.
		 * @type boolean
		 */
		this.config.noValidationInSourceEditMode = false;
		
		/**
		 * Automatically hooks onsubmit event.
		 * @type boolean
		 */
		this.config.automaticallyHookSubmitEvent = true;
		
		/**
		 * Set of whitelist(tag name and attributes) for use in validator
		 * @type Object
		 */
		this.config.whitelist = xq.predefinedWhitelist;
		
		/**
		 * Specifies a value of ID attribute for WYSIWYG document's body
		 * @type String
		 */
		this.config.bodyId = "";
		
		/**
		 * Specifies a value of CLASS attribute for WYSIWYG document's body
		 * @type String
		 */
		this.config.bodyClass = "xed";
		
		/**
		 * Plugins
		 * @type Object
		 */
		this.config.plugins = {};
		
		/**
		 * Shortcuts
		 * @type Object
		 */
		this.config.shortcuts = {};
		
		/**
		 * Autocorrections
		 * @type Object
		 */
		this.config.autocorrections = {};
		
		/**
		 * Autocompletions
		 * @type Object
		 */
		this.config.autocompletions = {};
		
		/**
		 * Template processors
		 * @type Object
		 */
		this.config.templateProcessors = {};
		
		/**
		 * Context menu handlers
		 * @type Object
		 */
		this.config.contextMenuHandlers = {};
		
		/**
		 * Original content element
		 * @type Element
		 */
		this.contentElement = contentElement;
		
		/**
		 * Owner document of content element
		 * @type Document
		 */
		this.doc = this.contentElement.ownerDocument;
		
		/**
		 * Body of content element
		 * @type Element
		 */
		this.body = this.doc.body;
		
		/**
		 * False or 'source' means source editing mode, true or 'wysiwyg' means WYSIWYG editing mode.
		 * @type Object
		 */
		this.currentEditMode = '';

		/**
		 * Timer
		 * @type xq.Timer
		 */
		this.timer = new xq.Timer(100);
		
		/**
		 * Base instance
		 * @type xq.rdom.Base
		 */
		this.rdom = xq.rdom.Base.createInstance();
		
		/**
		 * Base instance
		 * @type xq.validator.Base
		 */
		this.validator = null;
		
		/**
		 * Outmost wrapper div
		 * @type Element
		 */
		this.outmostWrapper = null;
		
		/**
		 * Source editor container
		 * @type Element
		 */
		this.sourceEditorDiv = null;
		
		/**
		 * Source editor textarea
		 * @type Element
		 */
		this.sourceEditorTextarea = null;
		
		/**
		 * WYSIWYG editor container
		 * @type Element
		 */
		this.wysiwygEditorDiv = null;
		
		/**
		 * Outer frame
		 * @type IFrame
		 */
		this.outerFrame = null;
		
		/**
		 * Design mode iframe
		 * @type IFrame
		 */
		this.editorFrame = null;
		
		this.toolbarContainer = toolbarContainer;
		
		/**
		 * Toolbar container
		 * @type Element
		 */
		this.toolbar = null;
		
		/**
		 * Undo/redo manager
		 * @type xq.EditHistory
		 */
		this.editHistory = null;
		
		/**
		 * Context menu container
		 * @type Element
		 */
		this.contextMenuContainer = null;
		
		/**
		 * Context menu items
		 * @type Array
		 */
		this.contextMenuItems = null;
		
		/**
		 * Platform dependent key event type
		 * @type String
		 */
		this.platformDepedentKeyEventType = (xq.Browser.isMac && xq.Browser.isGecko ? "keypress" : "keydown");
		
		this.addShortcuts(this.getDefaultShortcuts());
		
		this.addListener({
			onEditorCurrentContentChanged: function(xed) {
				var curFocusElement = xed.rdom.getCurrentElement();
				if(!curFocusElement || curFocusElement.ownerDocument !== xed.rdom.getDoc()) {
					return;
				}
				
				if(xed.lastFocusElement !== curFocusElement) {
					if(!xed.rdom.tree.isBlockOnlyContainer(xed.lastFocusElement) && xed.rdom.tree.isBlock(xed.lastFocusElement)) {
						xed.rdom.removeTrailingWhitespace(xed.lastFocusElement);
					}
					xed._fireOnElementChanged(xed, xed.lastFocusElement, curFocusElement);
					xed.lastFocusElement = curFocusElement;
				}
				
				xed.toolbar.triggerUpdate();
			}
		});
	},
	
	finalize: function() {
		for(var key in this.config.plugins) this.config.plugins[key].unload();
	},
	
	
	
	/////////////////////////////////////////////
	// Configuration Management
	
	getDefaultShortcuts: function() {
		if(xq.Browser.isMac) {
			// Mac FF & Safari
			return [
				{event:"Ctrl+Shift+SPACE", handler:"this.handleAutocompletion(); stop = true;"},
				{event:"SPACE", handler:"this.handleSpace()"},
				{event:"ENTER", handler:"this.handleEnter(false, false)"},
				{event:"Ctrl+ENTER", handler:"this.handleEnter(true, false)"},
				{event:"Ctrl+Shift+ENTER", handler:"this.handleEnter(true, true)"},
				{event:"TAB", handler:"this.handleTab()"},
				{event:"Shift+TAB", handler:"this.handleShiftTab()"},
				{event:"DELETE", handler:"this.handleDelete()"},
				{event:"BACKSPACE", handler:"this.handleBackspace()"},
				
				{event:"Ctrl+B", handler:"this.handleStrongEmphasis()"},
				{event:"Meta+B", handler:"this.handleStrongEmphasis()"},
				{event:"Ctrl+I", handler:"this.handleEmphasis()"},
				{event:"Meta+I", handler:"this.handleEmphasis()"},
				{event:"Ctrl+U", handler:"this.handleUnderline()"},
				{event:"Meta+U", handler:"this.handleUnderline()"},
				{event:"Ctrl+K", handler:"this.handleStrike()"},
				{event:"Meta+K", handler:"this.handleStrike()"},
				{event:"Meta+Z", handler:"this.handleUndo()"},
				{event:"Meta+Shift+Z", handler:"this.handleRedo()"},
				{event:"Meta+Y", handler:"this.handleRedo()"}
			];
		} else if(xq.Browser.isUbuntu) {
			//  Ubunto FF
			return [
				{event:"Ctrl+SPACE", handler:"this.handleAutocompletion(); stop = true;"},
				{event:"SPACE", handler:"this.handleSpace()"},
				{event:"ENTER", handler:"this.handleEnter(false, false)"},
				{event:"Ctrl+ENTER", handler:"this.handleEnter(true, false)"},
				{event:"Ctrl+Shift+ENTER", handler:"this.handleEnter(true, true)"},
				{event:"TAB", handler:"this.handleTab()"},
				{event:"Shift+TAB", handler:"this.handleShiftTab()"},
				{event:"DELETE", handler:"this.handleDelete()"},
				{event:"BACKSPACE", handler:"this.handleBackspace()"},
			
				{event:"Ctrl+B", handler:"this.handleStrongEmphasis()"},
				{event:"Ctrl+I", handler:"this.handleEmphasis()"},
				{event:"Ctrl+U", handler:"this.handleUnderline()"},
				{event:"Ctrl+K", handler:"this.handleStrike()"},
				{event:"Ctrl+Z", handler:"this.handleUndo()"},
				{event:"Ctrl+Shift+Z", handler:"this.handleRedo()"},
				{event:"Ctrl+Y", handler:"this.handleRedo()"}
			];
		} else {
			// Win IE & FF
			return [
				{event:"Ctrl+SPACE", handler:"this.handleAutocompletion(); stop = true;"},
				{event:"SPACE", handler:"this.handleSpace()"},
				{event:"ENTER", handler:"this.handleEnter(false, false)"},
				{event:"Ctrl+ENTER", handler:"this.handleEnter(true, false)"},
				{event:"Ctrl+Shift+ENTER", handler:"this.handleEnter(true, true)"},
				{event:"TAB", handler:"this.handleTab()"},
				{event:"Shift+TAB", handler:"this.handleShiftTab()"},
				{event:"DELETE", handler:"this.handleDelete()"},
				{event:"BACKSPACE", handler:"this.handleBackspace()"},
			
				{event:"Ctrl+B", handler:"this.handleStrongEmphasis()"},
				{event:"Ctrl+I", handler:"this.handleEmphasis()"},
				{event:"Ctrl+U", handler:"this.handleUnderline()"},
				{event:"Ctrl+K", handler:"this.handleStrike()"},
				{event:"Ctrl+Z", handler:"this.handleUndo()"},
				{event:"Ctrl+Shift+Z", handler:"this.handleRedo()"},
				{event:"Ctrl+Y", handler:"this.handleRedo()"}
			];
		}
	},
	
	/**
	 * Adds or replaces plugin.
	 *
	 * @param {String} id unique identifier
	 */
	addPlugin: function(id) {
		// already added?
		if(this.config.plugins[id]) return;
		
		// else
		var clazz = xq.plugin[id + "Plugin"];
		if(!clazz) throw "Unknown plugin id: [" + id + "]";
		
		var plugin = new clazz();
		this.config.plugins[id] = plugin;
		plugin.load(this);
	},

	/**
	 * Adds several plugins at once.
	 *
	 * @param {Array} list of plugin ids.
	 */
	addPlugins: function(list) {
		for(var i = 0; i < list.length; i++) {
			this.addPlugin(list[i]);
		}
	},
	
	/**
	 * Returns plugin matches with given identifier.
	 *
	 * @param {String} id unique identifier
	 */
	getPlugin: function(id) {return this.config.plugins[id];},

	/**
	 * Returns entire plugins
	 */
	getPlugins: function() {return this.config.plugins;},
	
	/**
	 * Remove plugin matches with given identifier.
	 *
	 * @param {String} id unique identifier
	 */
	removePlugin: function(id) {
		var plugin = this.config.shortcuts[id];
		if(plugin) {
			plugin.unload();
		}
		
		delete this.config.shortcuts[id];
	},
	
	
	
	/**
	 * Adds or replaces keyboard shortcut.
	 *
	 * @param {String} shortcut keymap expression like "CTRL+Space"
	 * @param {Object} handler string or function to be evaluated or called
	 */
	addShortcut: function(shortcut, handler) {
		this.config.shortcuts[shortcut] = {"event":new xq.Shortcut(shortcut), "handler":handler};
	},
	
	/**
	 * Adds several keyboard shortcuts at once.
	 *
	 * @param {Array} list of shortcuts. each element should have following structure: {event:"keymap expression", handler:handler}
	 */
	addShortcuts: function(list) {
		for(var i = 0; i < list.length; i++) {
			this.addShortcut(list[i].event, list[i].handler);
		}
	},

	/**
	 * Returns keyboard shortcut matches with given keymap expression.
	 *
	 * @param {String} shortcut keymap expression like "CTRL+Space"
	 */
	getShortcut: function(shortcut) {return this.config.shortcuts[shortcut];},

	/**
	 * Returns entire keyboard shortcuts' map
	 */
	getShortcuts: function() {return this.config.shortcuts;},
	
	/**
	 * Remove keyboard shortcut matches with given keymap expression.
	 *
	 * @param {String} shortcut keymap expression like "CTRL+Space"
	 */
	removeShortcut: function(shortcut) {delete this.config.shortcuts[shortcut];},
	
	/**
	 * Adds or replaces autocorrection handler.
	 *
	 * @param {String} id unique identifier
	 * @param {Object} criteria regex pattern or function to be used as a criterion for match
	 * @param {Object} handler string or function to be evaluated or called when criteria met
	 */
	addAutocorrection: function(id, criteria, handler) {
		if(criteria.exec) {
			var pattern = criteria;
			criteria = function(text) {return text.match(pattern)};
		}
		this.config.autocorrections[id] = {"criteria":criteria, "handler":handler};
	},
	
	/**
	 * Adds several autocorrection handlers at once.
	 *
	 * @param {Array} list of autocorrection. each element should have following structure: {id:"identifier", criteria:criteria, handler:handler}
	 */
	addAutocorrections: function(list) {
		for(var i = 0; i < list.length; i++) {
			this.addAutocorrection(list[i].id, list[i].criteria, list[i].handler);
		}
	},
	
	/**
	 * Returns autocorrection handler matches with given id
	 *
	 * @param {String} id unique identifier
	 */
	getAutocorrection: function(id) {return this.config.autocorrection[id];},
	
	/**
	 * Returns entire autocorrections' map
	 */
	getAutocorrections: function() {return this.config.autocorrections;},
	
	/**
	 * Removes autocorrection handler matches with given id
	 *
	 * @param {String} id unique identifier
	 */
	removeAutocorrection: function(id) {delete this.config.autocorrections[id];},
	
	/**
	 * Adds or replaces autocompletion handler.
	 *
	 * @param {String} id unique identifier
	 * @param {Object} criteria regex pattern or function to be used as a criterion for match
	 * @param {Object} handler string or function to be evaluated or called when criteria met
	 */
	addAutocompletion: function(id, criteria, handler) {
		if(criteria.exec) {
			var pattern = criteria;
			criteria = function(text) {
				var m = pattern.exec(text);
				return m ? m.index : -1;
			};
		}
		this.config.autocompletions[id] = {"criteria":criteria, "handler":handler};
	},
	
	/**
	 * Adds several autocompletion handlers at once.
	 *
	 * @param {Array} list of autocompletion. each element should have following structure: {id:"identifier", criteria:criteria, handler:handler}
	 */
	addAutocompletions: function(list) {
		for(var i = 0; i < list.length; i++) {
			this.addAutocompletion(list[i].id, list[i].criteria, list[i].handler);
		}
	},
	
	/**
	 * Returns autocompletion handler matches with given id
	 *
	 * @param {String} id unique identifier
	 */
	getAutocompletion: function(id) {return this.config.autocompletions[id];},
	
	/**
	 * Returns entire autocompletions' map
	 */
	getAutocompletions: function() {return this.config.autocompletions;},
	
	/**
	 * Removes autocompletion handler matches with given id
	 *
	 * @param {String} id unique identifier
	 */
	removeAutocompletion: function(id) {delete this.config.autocompletions[id];},
	
	/**
	 * Adds or replaces template processor.
	 *
	 * @param {String} id unique identifier
	 * @param {Object} handler string or function to be evaluated or called when template inserted
	 */
	addTemplateProcessor: function(id, handler) {
		this.config.templateProcessors[id] = {"handler":handler};
	},
	
	/**
	 * Adds several template processors at once.
	 *
	 * @param {Array} list of template processors. Each element should have following structure: {id:"identifier", handler:handler}
	 */
	addTemplateProcessors: function(list) {
		for(var i = 0; i < list.length; i++) {
			this.addTemplateProcessor(list[i].id, list[i].handler);
		}
	},
	
	/**
	 * Returns template processor matches with given id
	 *
	 * @param {String} id unique identifier
	 */
	getTemplateProcessor: function(id) {return this.config.templateProcessors[id];},

	/**
	 * Returns entire template processors' map
	 */
	getTemplateProcessors: function() {return this.config.templateProcessors;},

	/**
	 * Removes template processor matches with given id
	 *
	 * @param {String} id unique identifier
	 */
	removeTemplateProcessor: function(id) {delete this.config.templateProcessors[id];},



	/**
	 * Adds or replaces context menu handler.
	 *
	 * @param {String} id unique identifier
	 * @param {Object} handler string or function to be evaluated or called when onContextMenu occured
	 */
	addContextMenuHandler: function(id, handler) {
		this.config.contextMenuHandlers[id] = {"handler":handler};
	},
	
	/**
	 * Adds several context menu handlers at once.
	 *
	 * @param {Array} list of handlers. Each element should have following structure: {id:"identifier", handler:handler}
	 */
	addContextMenuHandlers: function(list) {
		for(var i = 0; i < list.length; i++) {
			this.addContextMenuHandler(list[i].id, list[i].handler);
		}
	},
	
	/**
	 * Returns context menu handler matches with given id
	 *
	 * @param {String} id unique identifier
	 */
	getContextMenuHandler: function(id) {return this.config.contextMenuHandlers[id];},

	/**
	 * Returns entire context menu handlers' map
	 */
	getContextMenuHandlers: function() {return this.config.contextMenuHandlers;},

	/**
	 * Removes context menu handler matches with given id
	 *
	 * @param {String} id unique identifier
	 */
	removeContextMenuHandler: function(id) {delete this.config.contextMenuHandlers[id];},
	
	
	
	/**
	 * Sets width of editor.
	 *
	 * @param {String} w Valid CSS value for style.width. For example, "100%", "200px".
	 */
	setWidth: function(w) {
		this.outmostWrapper.style.width = w;
	},
	
	
	
	/**
	 * Sets height of editor.
	 *
	 * @param {String} h Valid CSS value for style.height. For example, "100%", "200px".
	 */
	setHeight: function(h) {
		this.wysiwygEditorDiv.style.height = h;
		this.sourceEditorDiv.style.height = h;
	},
	
	
	
	/////////////////////////////////////////////
	// Edit mode management
	
	/**
	 * Returns current edit mode - wysiwyg, source
	 */
	getCurrentEditMode: function() {
		return this.currentEditMode;
	},
	
	/**
	 * Toggle edit mode between source and wysiwyg 
	 */
	toggleSourceAndWysiwygMode: function() {
		var mode = this.getCurrentEditMode();
		this.setEditMode(mode === 'wysiwyg' ? 'source' : 'wysiwyg');
	},
	
	/**
	 * Switches between WYSIWYG/Source mode.
	 *
	 * @param {String} mode 'wysiwyg' means WYSIWYG editing mode, and 'source' means source editing mode.
	 */
	setEditMode: function(mode) {
		if(typeof mode !== 'string') throw "[mode] is not a string."
		if(['wysiwyg', 'source'].indexOf(mode) === -1) throw "Illegal [mode] value: '" + mode + "'. Use 'wysiwyg' or 'source'";
		if(this.currentEditMode === mode) return;
		
		// create editor frame if there's no editor frame.
		var editorCreated = !!this.outmostWrapper;
		if(!editorCreated) {
			// create validator
			this.validator = xq.validator.Base.createInstance(
				this.doc.location.href,
				this.config.urlValidationMode,
				this.config.whitelist
			);

			this._fireOnStartInitialization(this);

			this._createEditorFrame(mode);
			var temp = window.setInterval(function() {
				// wait for loading
				if(this.getBody()) {
					window.clearInterval(temp);
	
					// @WORKAROUND: it is needed to fix IE6 horizontal scrollbar problem
					if(xq.Browser.isIE6) {
						this.rdom.getDoc().documentElement.style.overflowY='auto';
						this.rdom.getDoc().documentElement.style.overflowX='hidden';
					}
					
					this.setEditMode(mode);
					if(this.config.autoFocusOnInit) this.focus();
					
					this.timer.start();
					this._fireOnInitialized(this);
				}
			}.bind(this), 10);
			
			return;
		}
		
		// switch mode
		if(mode === 'wysiwyg') {
			this._setEditModeToWysiwyg();
		} else { // mode === 'source'
			this._setEditModeToSource();
		}
		
		// fire event
		var oldEditMode = this.currentEditMode;
		this.currentEditMode = mode;
		
		this._fireOnCurrentEditModeChanged(this, oldEditMode, this.currentEditMode);
	},
	
	_setEditModeToWysiwyg: function() {
		// Turn off static content and source editor
		this.contentElement.style.display = "none";
		this.sourceEditorDiv.style.display = "none";
		
		// Update contents
		if(this.currentEditMode === 'source') {
			// get html from source editor
			var html = this.getSourceContent(true);
			
			// invalidate it and load it into wysiwyg editor
			var invalidHtml = this.validator.invalidate(html);
			invalidHtml = this.removeUnnecessarySpaces(invalidHtml);
			if(invalidHtml.isBlank()) {
				this.rdom.clearRoot();
			} else {
				this.rdom.getRoot().innerHTML = invalidHtml;
				this.rdom.wrapAllInlineOrTextNodesAs("P", this.rdom.getRoot(), true);
			}
		} else {
			// invalidate static html and load it into wysiwyg editor
			var invalidHtml = this.validator.invalidate(this.getStaticContent());
			invalidHtml = this.removeUnnecessarySpaces(invalidHtml);
			if(invalidHtml.isBlank()) {
				this.rdom.clearRoot();
			} else {
				this.rdom.getRoot().innerHTML = invalidHtml;
				this.rdom.wrapAllInlineOrTextNodesAs("P", this.rdom.getRoot(), true);
			}
		}
		
		// Turn on wysiwyg editor
		this.wysiwygEditorDiv.style.display = "block";
		this.outmostWrapper.style.display = "block";
		
		// Without this, xq.rdom.Base.focus() doesn't work correctly.
		if(xq.Browser.isGecko) this.rdom.placeCaretAtStartOf(this.rdom.getRoot());
		
		if(this.toolbar) this.toolbar.enableButtons();
	},
	
	_setEditModeToSource: function() {
		// Update contents
		var validHtml = null;
		if(this.currentEditMode === 'wysiwyg') {
			validHtml = this.getWysiwygContent();
		} else {
			validHtml = this.getStaticContent();
		}
		this.sourceEditorTextarea.value = validHtml

		// Turn off static content and wysiwyg editor
		this.contentElement.style.display = "none";
		this.wysiwygEditorDiv.style.display = "none";

		// Turn on source editor
		this.sourceEditorDiv.style.display = "block";
		this.outmostWrapper.style.display = "block";
		if(this.toolbar) this.toolbar.disableButtons(['html']);
	},
	
	/**
	 * Load CSS into WYSIWYG mode document
	 *
	 * @param {string} path URL
	 */
	loadStylesheet: function(path) {
		var head = this.getDoc().getElementsByTagName("HEAD")[0];
		var link = this.getDoc().createElement("LINK");
		link.rel = "Stylesheet";
		link.type = "text/css";
		link.href = path;
		head.appendChild(link);
	},
	
	/**
	 * Sets editor's dynamic content from static content
	 */
	loadCurrentContentFromStaticContent: function() {
		if(this.getCurrentEditMode() == 'wysiwyg') {
			// update WYSIWYG editor
			var html = this.validator.invalidate(this.getStaticContent());
			html = this.removeUnnecessarySpaces(html);
			
			if(html.isBlank()) {
				this.rdom.clearRoot();
			} else {
				this.rdom.getRoot().innerHTML = html;
				this.rdom.wrapAllInlineOrTextNodesAs("P", this.rdom.getRoot(), true);
			}
		} else { // 'source'
			this.sourceEditorTextarea.value = this.getStaticContent();
		}
		
		this._fireOnCurrentContentChanged(this);
	},

	/**
	 * Removes unnecessary spaces, tabs and new lines.
	 * 
	 * @param {String} html HTML string.
	 * @returns {String} Modified HTML string.
	 */
	removeUnnecessarySpaces: function(html) {
		var blocks = this.rdom.tree.getBlockTags().join("|");
		var regex = new RegExp("\\s*<(/?)(" + blocks + ")>\\s*", "img");
		return html.replace(regex, '<$1$2>');
	},
	
	/**
	 * Gets editor's dynamic content from current editor(source or WYSIWYG)
	 * 
	 * @return {Object} HTML String
	 */
	getCurrentContent: function() {
		if(this.getCurrentEditMode() === 'source') {
			return this.getSourceContent(this.config.noValidationInSourceEditMode);
		} else {
			return this.getWysiwygContent();
		}
	},
	
	/**
	 * Gets editor's dynamic content from WYSIWYG editor
	 * 
	 * @return {Object} HTML String
	 */
	getWysiwygContent: function() {
		return this.validator.validate(this.rdom.getRoot());
	},
	
	/**
	 * Gets editor's dynamic content from source editor
	 * 
	 * @return {Object} HTML String
	 */
	getSourceContent: function(noValidation) {
		var raw = this.sourceEditorTextarea.value;
		if(noValidation) return raw;
		
		var tempDiv = document.createElement('div');
		tempDiv.innerHTML = this.removeUnnecessarySpaces(raw);
		
		var rdom = xq.rdom.Base.createInstance();
		rdom.wrapAllInlineOrTextNodesAs("P", tempDiv, true);
		
		return this.validator.validate(tempDiv, true);
	},
	
	/**
	 * Sets editor's original content
	 *
	 * @param {Object} content HTML String
	 */
	setStaticContent: function(content) {
		this.contentElement.value = content;
		this._fireOnStaticContentChanged(this, content);
	},
	
	/**
	 * Gets editor's original content
	 *
	 * @return {Object} HTML String
	 */
	getStaticContent: function() {
		return this.contentElement.value;
	},
	
	/**
	 * Gets editor's original content as (newely created) DOM node
	 *
	 * @return {Element} DIV element
	 */
	getStaticContentAsDOM: function() {
		var div = this.doc.createElement('DIV');
		div.innerHTML = this.contentElement.value;
		return div;
	},
	
	/**
	 * Gives focus to editor
	 */
	focus: function() {
		if(this.getCurrentEditMode() === 'wysiwyg') {
			this.rdom.focus();
			if(this.toolbar) this.toolbar.triggerUpdate();
		} else if(this.getCurrentEditMode() === 'source') {
			this.sourceEditorTextarea.focus();
		}
	},
	
	getWysiwygEditorDiv: function() {
		return this.wysiwygEditorDiv;
	},
	
	getSourceEditorDiv: function() {
		return this.sourceEditorDiv;
	},
	
	/**
	 * Returns outer iframe object
	 */
	getOuterFrame: function() {
		return this.outerFrame;
	},
	
	/**
	 * Returns outer iframe document
	 */
	getOuterDoc: function() {
		return this.outerFrame.contentWindow.document;
	},
	
	/**
	 * Returns designmode iframe object
	 */
	getFrame: function() {
		return this.editorFrame;
	},
	
	/**
	 * Returns designmode window object
	 */
	getWin: function() {
		return this.rdom.getWin();
	},
	
	/**
	 * Returns designmode document object
	 */
	getDoc: function() {
		return this.rdom.getDoc();
	},
	
	/**
	 * Returns designmode body object
	 */
	getBody: function() {
		return this.rdom.getRoot();
	},
	
	/**
	 * Returns outmost wrapper element
	 */
	getOutmostWrapper: function() {
		return this.outmostWrapper;
	},
	
	_createIFrame: function(doc, width, height) {
		var frame = doc.createElement("iframe");
		
		// IE displays warning when a protocol is HTTPS, because IE6 treats IFRAME
		// without SRC attribute as insecure.
		if(xq.Browser.isIE) frame.src = 'javascript:""';
		
		frame.style.width = width || "100%";
		frame.style.height = height || "100%";
		frame.setAttribute("frameBorder", "0");
		frame.setAttribute("marginWidth", "0");
		frame.setAttribute("marginHeight", "0");
		frame.setAttribute("allowTransparency", "auto");
		return frame;
	},

	_createDoc: function(frame, head, cssList, bodyId, bodyClass, body) {
		var sb = [];
		if(!xq.Browser.isTrident) {
			// @WORKAROUND: IE6/7 has caret movement and scrolling problem if I include following DTD.
			sb.push('<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">');
		}
		sb.push('<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="ko">');
		sb.push('<head>');
		sb.push('<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />');
		if(head) sb.push(head);

		if(cssList) for(var i = 0; i < cssList.length; i++) {
			sb.push('<link rel="Stylesheet" type="text/css" href="' + cssList[i] + '" />');
		}
		sb.push('</head>');
		sb.push('<body ' + (bodyClass ? 'class="' + bodyClass + '"' : '') + ' ' + (bodyId ? 'id="' + bodyId + '"' : '') + '>');
		if(body) sb.push(body);
		sb.push('</body>');
		sb.push('</html>');
		
		var doc = frame.contentWindow.document;
		doc.open();
		doc.write(sb.join(""));
		doc.close();
		return doc;
	},

	_createEditorFrame: function(mode) {
		// turn off static content
		this.contentElement.style.display = "none";
		
		// create outer DIV
		this.outmostWrapper = this.doc.createElement('div');
		this.outmostWrapper.className = "xquared";
		this.contentElement.parentNode.insertBefore(this.outmostWrapper, this.contentElement);
		
		// create toolbar
		if(this.toolbarContainer || this.config.generateDefaultToolbar) {
			this.toolbar = new xq.ui.Toolbar(
				this,
				this.toolbarContainer,
				this.outmostWrapper,
				this.config.defaultToolbarButtonMap,
				this.config.imagePathForDefaultToolbar,
				function() {
					var element = this.getCurrentEditMode() === 'wysiwyg' ? this.lastFocusElement : null;
					return element && element.nodeName != "BODY" ? this.rdom.collectStructureAndStyle(element) : null;
				}.bind(this)
			);
		}
		
		// create source editor div
		this.sourceEditorDiv = this.doc.createElement('div');
		this.sourceEditorDiv.className = "editor source_editor"; //TODO: remove editor
		this.sourceEditorDiv.style.display = "none";
		this.outmostWrapper.appendChild(this.sourceEditorDiv);
		
		// create TEXTAREA for source editor
		this.sourceEditorTextarea = this.doc.createElement('textarea');
		this.sourceEditorDiv.appendChild(this.sourceEditorTextarea);
		
		// create WYSIWYG editor div
		this.wysiwygEditorDiv = this.doc.createElement('div');
		this.wysiwygEditorDiv.className = "editor wysiwyg_editor"; //TODO: remove editor
		this.outmostWrapper.appendChild(this.wysiwygEditorDiv);
		
		// create outer iframe for WYSIWYG editor
		this.outerFrame = this._createIFrame(document);
		this.wysiwygEditorDiv.appendChild(this.outerFrame);
		var outerDoc = this._createDoc(
			this.outerFrame,
			'<style type="text/css">html, body {margin:0px; padding:0px; background-color: transparent; width: 100%; height: 100%; overflow: hidden;}</style>'
		);

		// create designmode iframe for WYSIWYG editor
		this.editorFrame = this._createIFrame(outerDoc);
		
		outerDoc.body.appendChild(this.editorFrame);
		var editorDoc = this._createDoc(
			this.editorFrame,
			'<style type="text/css">html, body {margin:0px; padding:0px; background-color: transparent;}</style>' +
			(!xq.Browser.isTrident ? '<base href="./" />' : '') + // @WORKAROUND: it is needed to force href of pasted content to be an absolute url
			(this.config.changeCursorOnLink ? '<style>.xed a {cursor: pointer !important;}</style>' : ''),
			this.config.contentCssList,
			this.config.bodyId,
			this.config.bodyClass,
			''
		);
		this.rdom.setWin(this.editorFrame.contentWindow);
		this.editHistory = new xq.EditHistory(this.rdom);
		
		// turn on designmode
		this.rdom.getDoc().designMode = "On";
		
		// turn off Firefox's table editing feature
		if(xq.Browser.isGecko) {
			try {this.rdom.getDoc().execCommand("enableInlineTableEditing", false, "false")} catch(ignored) {}
		}
		
		// register event handlers
		this._registerEventHandlers();
		
		// hook onsubmit of form
		if(this.config.automaticallyHookSubmitEvent && this.contentElement.form) {
			var original = this.contentElement.form.onsubmit;
			this.contentElement.form.onsubmit = function() {
				this.contentElement.value = this.getCurrentContent();
				return original ? original.bind(this.contentElement.form)() : true;
			}.bind(this);
		}
	},
	
	
	
	/////////////////////////////////////////////
	// Event Management
	
	_registerEventHandlers: function() {
		var events = [this.platformDepedentKeyEventType, 'click', 'keyup', 'mouseup', 'contextmenu'];
		
		if(xq.Browser.isTrident && this.config.changeCursorOnLink) events.push('mousemove');
		
		var handler = this._handleEvent.bindAsEventListener(this);
		for(var i = 0; i < events.length; i++) {
			xq.observe(this.getDoc(), events[i], handler);
		}
		
		if(xq.Browser.isGecko) {
			xq.observe(this.getDoc(), "focus", handler);
			xq.observe(this.getDoc(), "blur", handler);
			xq.observe(this.getDoc(), "scroll", handler);
			xq.observe(this.getDoc(), "dragdrop", handler);
		} else {
			xq.observe(this.getWin(), "focus", handler);
			xq.observe(this.getWin(), "blur", handler);
			xq.observe(this.getWin(), "scroll", handler);
		}
	},
	
	_handleEvent: function(e) {
		this._fireOnBeforeEvent(this, e);
		if(e.stopProcess) {
			xq.stopEvent(e);
			return false;
		}
		
		// Trident only
		if(e.type === 'mousemove') {
			if(!this.config.changeCursorOnLink) return true;
			
			var link = !!this.rdom.getParentElementOf(e.srcElement, ["A"]);
			
			var editable = this.getBody().contentEditable;
			editable = editable === 'inherit' ? false : editable;
			
			if(editable !== link && !this.rdom.hasSelection()) this.getBody().contentEditable = !link;
			return true;
		}
		
		var stop = false;
		var modifiedByCorrection = false;
		if(e.type === this.platformDepedentKeyEventType) {
			var undoPerformed = false;
			modifiedByCorrection = this.rdom.correctParagraph();
			for(var key in this.config.shortcuts) {
				if(!this.config.shortcuts[key].event.matches(e)) continue;
				
				var handler = this.config.shortcuts[key].handler;
				var xed = this;
				stop = (typeof handler === "function") ? handler(this) : eval(handler);
				
				if(key === "undo") undoPerformed = true;
			}
		} else if(e.type === 'click' && e.button === 0 && this.config.enableLinkClick) {
			var a = this.rdom.getParentElementOf(e.target || e.srcElement, ["A"]);
			if(a) stop = this.handleClick(e, a);
		} else if(["keyup", "mouseup"].indexOf(e.type) !== -1) {
			modifiedByCorrection = this.rdom.correctParagraph();
		} else if(["contextmenu"].indexOf(e.type) !== -1) {
			this._handleContextMenu(e);
		} else if("focus" == e.type) {
			this.rdom.focused = true;
		} else if("blur" == e.type) {
			this.rdom.focused = false;
		}
		
		if(stop) xq.stopEvent(e);
		
		this._fireOnCurrentContentChanged(this);
		this._fireOnAfterEvent(this, e);
		
		if(!undoPerformed && !modifiedByCorrection) this.editHistory.onEvent(e);
		
		return !stop;
	},

	/**
	 * TODO: remove dup with handleAutocompletion
	 */
	handleAutocorrection: function() {
		var block = this.rdom.getCurrentBlockElement();
		// TODO: use complete unescape algorithm
		var text = this.rdom.getInnerText(block).replace(/&nbsp;/gi, " ");
		
		var acs = this.config.autocorrections;
		var performed = false;
		
		var stop = false;
		for(var key in acs) {
			var ac = acs[key];
			if(ac.criteria(text)) {
				try {
					this.editHistory.onCommand();
					this.editHistory.disable();
					if(typeof ac.handler === "String") {
						var xed = this;
						var rdom = this.rdom;
						eval(ac.handler);
					} else {
						stop = ac.handler(this, this.rdom, block, text);
					}
					this.editHistory.enable();
				} catch(ignored) {}
				
				block = this.rdom.getCurrentBlockElement();
				text = this.rdom.getInnerText(block);
				
				performed = true;
				if(stop) break;
			}
		}
		
		return stop;
	},
	
	/**
	 * TODO: remove dup with handleAutocorrection
	 */
	handleAutocompletion: function() {
		var acs = this.config.autocompletions;
		if(xq.isEmptyHash(acs)) return;
		
		if(this.rdom.hasSelection()) {
			var text = this.rdom.getSelectionAsText();
			this.rdom.deleteSelection();
			var wrapper = this.rdom.insertNode(this.rdom.createElement("SPAN"));
			wrapper.innerHTML = text;
			
			var marker = this.rdom.pushMarker();
			
			var filtered = [];
			for(var key in acs) {
				filtered.push([key, acs[key].criteria(text)]);
			}
			filtered = filtered.findAll(function(elem) {
				return elem[1] !== -1;
			});
			
			if(filtered.length === 0) {
				this.rdom.popMarker(true);
				return;
			}
			
			var minIndex = 0;
			var min = filtered[0][1];
			for(var i = 0; i < filtered.length; i++) {
				if(filtered[i][1] < min) {
					minIndex = i;
					min = filtered[i][1];
				}
			}
			
			var ac = acs[filtered[minIndex][0]];
			
			this.editHistory.disable();
			this.rdom.selectElement(wrapper);
		} else {
			var marker = this.rdom.pushMarker();

			var filtered = [];
			for(var key in acs) {
				filtered.push([key, this.rdom.testSmartWrap(marker, acs[key].criteria).textIndex]);
			}
			filtered = filtered.findAll(function(elem) {
				return elem[1] !== -1;
			});
			
			if(filtered.length === 0) {
				this.rdom.popMarker(true);
				return;
			}
			
			var minIndex = 0;
			var min = filtered[0][1];
			for(var i = 0; i < filtered.length; i++) {
				if(filtered[i][1] < min) {
					minIndex = i;
					min = filtered[i][1];
				}
			}
			
			var ac = acs[filtered[minIndex][0]];
			
			this.editHistory.disable();
			
			var wrapper = this.rdom.smartWrap(marker, "SPAN", ac.criteria);
		}
		
		var block = this.rdom.getCurrentBlockElement();
		
		// TODO: use complete unescape algorithm
		var text = this.rdom.getInnerText(wrapper).replace(/&nbsp;/gi, " ");
		
		try {
			// call handler
			if(typeof ac.handler === "String") {
				var xed = this;
				var rdom = this.rdom;
				eval(ac.handler);
			} else {
				ac.handler(this, this.rdom, block, wrapper, text);
			}
		} catch(ignored) {}
		
		try {
			this.rdom.unwrapElement(wrapper);
		} catch(ignored) {}
		
		if(this.rdom.isEmptyBlock(block)) this.rdom.correctEmptyElement(block);
		
		this.editHistory.enable();
		this.editHistory.onCommand();
		
		this.rdom.popMarker(true);
	},

	/**
	 * Handles click event
	 *
	 * @param {Event} e click event
	 * @param {Element} target target element(usually has A tag)
	 */
	handleClick: function(e, target) {
		var href = decodeURI(target.href);
		if(!xq.Browser.isTrident) {
			if(!e.ctrlKey && !e.shiftKey && e.button !== 1) {
				window.location.href = href;
				return true;
			}
		} else {
			if(e.shiftKey) {
				window.open(href, "_blank");
			} else {
				window.location.href = href;
			}
			return true;
		}
		
		return false;
	},

	/**
	 * Show link dialog
	 *
	 * TODO: should support modify/unlink
	 * TODO: Add selenium test
	 */
	handleLink: function() {
		var text = this.rdom.getSelectionAsText() || '';
		var dialog = new xq.ui.FormDialog(
			this,
			xq.ui_templates.basicLinkDialog,
			function(dialog) {
				if(text) {
					dialog.form.text.value = text;
					dialog.form.url.focus();
					dialog.form.url.select();
				}
			},
			function(data) {
				this.focus();
				
				if(xq.Browser.isTrident) {
					var rng = this.rdom.rng();
					rng.moveToBookmark(bm);
					rng.select();
				}
				
				if(!data) return;
				this.handleInsertLink(false, data.url, data.text, data.text);
			}.bind(this)
		);
		
		if(xq.Browser.isTrident) var bm = this.rdom.rng().getBookmark();
		
		dialog.show({position: 'centerOfEditor'});
		
		return true;
	},
	
	/**
	 * Inserts link or apply link into selected area
	 * @TODO Add selenium test
	 * 
	 * @param {boolean} autoSelection if set true and there's no selection, automatically select word to link(if possible)
	 * @param {String} url url
	 * @param {String} title title of link
	 * @param {String} text text of link. If there's a selection(manually or automatically), it will be replaced with this text
	 *
	 * @returns {Element} created element
	 */
	handleInsertLink: function(autoSelection, url, title, text) {
		if(autoSelection && !this.rdom.hasSelection()) {
			var marker = this.rdom.pushMarker();
			var a = this.rdom.smartWrap(marker, "A", function(text) {
				var index = text.lastIndexOf(" ");
				return index === -1 ? index : index + 1;
			});
			a.href = url;
			a.title = title;
			if(text) {
				a.innerHTML = ""
				a.appendChild(this.rdom.createTextNode(text));
			} else if(!a.hasChildNodes()) {
				this.rdom.deleteNode(a);
			}
			this.rdom.popMarker(true);
		} else {
			text = text || (this.rdom.hasSelection() ? this.rdom.getSelectionAsText() : null);
			if(!text) return;
			
			this.rdom.deleteSelection();
			
			var a = this.rdom.createElement('A');
			a.href = url;
			a.title = title;
			a.appendChild(this.rdom.createTextNode(text));
			this.rdom.insertNode(a);
		}
		
		var historyAdded = this.editHistory.onCommand();
		this._fireOnCurrentContentChanged(this);
		
		return true;
	},
	
	/**
	 * @TODO Add selenium test
	 */
	handleSpace: function() {
		// If it has selection, perform default action.
		if(this.rdom.hasSelection()) return false;
		
		// Trident performs URL replacing automatically
		if(!xq.Browser.isTrident) {
			this.replaceUrlToLink();
		}
		
		return false;
	},
	
	/**
	 * Called when enter key pressed.
	 * @TODO Add selenium test
	 *
	 * @param {boolean} skipAutocorrection if set true, skips autocorrection
	 * @param {boolean} forceInsertParagraph if set true, inserts paragraph
	 */
	handleEnter: function(skipAutocorrection, forceInsertParagraph) {
		// If it has selection, perform default action.
		if(this.rdom.hasSelection()) return false;
		
		// @WORKAROUND:
		// If caret is in HR, default action should be performed and
		// this._handleEvent() will correct broken HTML
		if(xq.Browser.isTrident && this.rdom.tree.isBlockOnlyContainer(this.rdom.getCurrentElement()) && this.rdom.recentHR) {
			this.rdom.insertNodeAt(this.rdom.makeEmptyParagraph(), this.rdom.recentHR, "before");
			this.rdom.recentHR = null;
			return true;
		}
		
		// Perform autocorrection
		if(!skipAutocorrection && this.handleAutocorrection()) return true;
		
		var block = this.rdom.getCurrentBlockElement();
		var info = this.rdom.collectStructureAndStyle(block);
		
		// Perform URL replacing. Trident performs URL replacing automatically
		if(!xq.Browser.isTrident) {
			this.replaceUrlToLink();
		}
		
		var atEmptyBlock = this.rdom.isCaretAtEmptyBlock();
		var atStart = atEmptyBlock || this.rdom.isCaretAtBlockStart();
		var atEnd = atEmptyBlock || (!atStart && this.rdom.isCaretAtBlockEnd());
		var atEdge = atEmptyBlock || atStart || atEnd;
		
		if(!atEdge) {
			var marker = this.rdom.pushMarker();
			
			if(this.rdom.isFirstLiWithNestedList(block) && !forceInsertParagraph) {
				var parent = block.parentNode;
				this.rdom.unwrapElement(block);
				block = parent;
			} else if(block.nodeName !== "LI" && this.rdom.tree.isBlockContainer(block)) {
				block = this.rdom.wrapAllInlineOrTextNodesAs("P", block, true).first();
			}
			this.rdom.splitElementUpto(marker, block);
			
			this.rdom.popMarker(true);
		} else if(atEmptyBlock) {
			this._handleEnterAtEmptyBlock();

			if(!xq.Browser.isWebkit) {
				if(info.fontSize && info.fontSize !== "2") this.handleFontSize(info.fontSize);
				if(info.fontName) this.handleFontFace(info.fontName);
			}
		} else {
			this._handleEnterAtEdge(atStart, forceInsertParagraph);
			
			if(!xq.Browser.isWebkit) {
				if(info.fontSize && info.fontSize !== "2") this.handleFontSize(info.fontSize);
				if(info.fontName) this.handleFontFace(info.fontName);
			}
		}
		
		return true;
	},
	
	/**
	 * Moves current block upward or downward
	 *
	 * @param {boolean} up moves current block upward
	 */
	handleMoveBlock: function(up) {
		var block = this.rdom.moveBlock(this.rdom.getCurrentBlockElement(), up);
		if(block) {
			this.rdom.selectElement(block, false);
			if(this.rdom.isEmptyBlock(block)) this.rdom.collapseSelection(true);
			
			block.scrollIntoView(false);
			
			var historyAdded = this.editHistory.onCommand();
			this._fireOnCurrentContentChanged(this);
		}
		return true;
	},
	
	/**
	 * Called when tab key pressed
	 * @TODO: Add selenium test
	 */
	handleTab: function() {
		var hasSelection = this.rdom.hasSelection();
		var table = this.rdom.getParentElementOf(this.rdom.getCurrentBlockElement(), ["TABLE"]);
		
		if(hasSelection) {
			this.handleIndent();
		} else if (table && table.className === "datatable") {
			this.handleMoveToNextCell();
		} else if (this.rdom.isCaretAtBlockStart()) {
			this.handleIndent();
		} else {
			this.handleInsertTab();
		}

		return true;
	},
	
	/**
	 * Called when shift+tab key pressed
	 * @TODO: Add selenium test
	 */
	handleShiftTab: function() {
		var hasSelection = this.rdom.hasSelection();
		var table = this.rdom.getParentElementOf(this.rdom.getCurrentBlockElement(), ["TABLE"]);
		
		if(hasSelection) {
			this.handleOutdent();
		} else if (table && table.className === "datatable") {
			this.handleMoveToPreviousCell();
		} else {
			this.handleOutdent();
		}
		
		return true;
	},
	
	/**
	 * Inserts three non-breaking spaces
	 * @TODO: Add selenium test
	 */
	handleInsertTab: function() {
		this.rdom.insertHtml('&nbsp;');
		this.rdom.insertHtml('&nbsp;');
		this.rdom.insertHtml('&nbsp;');
		
		return true;
	},
	
	/**
	 * Called when delete key pressed
	 * @TODO: Add selenium test
	 */
	handleDelete: function() {
		if(this.rdom.hasSelection() || !this.rdom.isCaretAtBlockEnd()) return false;
		return this._handleMerge(true);
	},
	
	/**
	 * Called when backspace key pressed
	 * @TODO: Add selenium test
	 */
	handleBackspace: function() {
		if(this.rdom.hasSelection() || !this.rdom.isCaretAtBlockStart()) return false;
		return this._handleMerge(false);
	},
	
	_handleMerge: function(withNext) {
		var block = this.rdom.getCurrentBlockElement();
		
		if(this.rdom.isEmptyBlock(block) && !this.rdom.tree.isBlockContainer(block.nextSibling) && withNext) {
			var blockToMove = this.rdom.removeBlock(block);
			this.rdom.placeCaretAtStartOf(blockToMove);
			blockToMove.scrollIntoView(false);

			var historyAdded = this.editHistory.onCommand();
			this._fireOnCurrentContentChanged(this);
			
			return true;
		} else {
			// save caret position;
			var marker = this.rdom.pushMarker();

			// perform merge
			var merged = this.rdom.mergeElement(block, withNext, withNext);
			if(!merged && !withNext) this.rdom.extractOutElementFromParent(block);
			
			// restore caret position
			this.rdom.popMarker(true);
			if(merged) this.rdom.correctEmptyElement(merged);
			
			var historyAdded = this.editHistory.onCommand();
			this._fireOnCurrentContentChanged(this);
			return !!merged;
		}
	},
	
	/**
	 * (in table) Moves caret to the next cell
	 * @TODO: Add selenium test
	 */
	handleMoveToNextCell: function() {
		this._handleMoveToCell("next");
	},

	/**
	 * (in table) Moves caret to the previous cell
	 * @TODO: Add selenium test
	 */
	handleMoveToPreviousCell: function() {
		this._handleMoveToCell("prev");
	},

	/**
	 * (in table) Moves caret to the above cell
	 * @TODO: Add selenium test
	 */
	handleMoveToAboveCell: function() {
		this._handleMoveToCell("above");
	},

	/**
	 * (in table) Moves caret to the below cell
	 * @TODO: Add selenium test
	 */
	handleMoveToBelowCell: function() {
		this._handleMoveToCell("below");
	},

	_handleMoveToCell: function(dir) {
		var block = this.rdom.getCurrentBlockElement();
		var cell = this.rdom.getParentElementOf(block, ["TD", "TH"]);
		var table = this.rdom.getParentElementOf(cell, ["TABLE"]);
		var rtable = new xq.RichTable(this.rdom, table);
		var target = null;
		
		if(["next", "prev"].indexOf(dir) !== -1) {
			var toNext = dir === "next";
			target = toNext ? rtable.getNextCellOf(cell) : rtable.getPreviousCellOf(cell);
		} else {
			var toBelow = dir === "below";
			target = toBelow ? rtable.getBelowCellOf(cell) : rtable.getAboveCellOf(cell);
		}

		if(!target) {
			var finder = function(node) {return ['TD', 'TH'].indexOf(node.nodeName) === -1 && this.tree.isBlock(node) && !this.tree.hasBlocks(node);}.bind(this.rdom);
			var exitCondition = function(node) {return this.tree.isBlock(node) && !this.tree.isDescendantOf(this.getRoot(), node)}.bind(this.rdom);
			
			target = (toNext || toBelow) ? 
				this.rdom.tree.findForward(cell, finder, exitCondition) :
				this.rdom.tree.findBackward(table, finder, exitCondition);
		}
		
		if(target) this.rdom.placeCaretAtStartOf(target);
	},
	
	/**
	 * Applies STRONG tag
	 * @TODO: Add selenium test
	 */
	handleStrongEmphasis: function() {
		this.rdom.applyStrongEmphasis();

		var historyAdded = this.editHistory.onCommand();
		this._fireOnCurrentContentChanged(this);
		
		return true;
	},
	
	/**
	 * Applies EM tag
	 * @TODO: Add selenium test
	 */
	handleEmphasis: function() {
		this.rdom.applyEmphasis();
		
		var historyAdded = this.editHistory.onCommand();
		this._fireOnCurrentContentChanged(this);
		
		return true;
	},
	
	/**
	 * Applies EM.underline tag
	 * @TODO: Add selenium test
	 */
	handleUnderline: function() {
		this.rdom.applyUnderline();
		
		var historyAdded = this.editHistory.onCommand();
		this._fireOnCurrentContentChanged(this);
		
		return true;
	},
	
	/**
	 * Applies SPAN.strike tag
	 * @TODO: Add selenium test
	 */
	handleStrike: function() {
		this.rdom.applyStrike();

		var historyAdded = this.editHistory.onCommand();
		this._fireOnCurrentContentChanged(this);

		return true;
	},
	
	/**
	 * Removes all style
	 * @TODO: Add selenium test
	 */
	handleRemoveFormat: function() {
		this.rdom.applyRemoveFormat();

		var historyAdded = this.editHistory.onCommand();
		this._fireOnCurrentContentChanged(this);

		return true;
	},
	
	/**
	 * Remove link
	 * @TODO: Add selenium test
	 */
	handleRemoveLink: function() {
		this.rdom.applyRemoveLink();
		
		var historyAdded = this.editHistory.onCommand();
		this._fireOnCurrentContentChanged(this);
		
		return true;
	},
	
	/**
	 * Inserts table
	 * @TODO: Add selenium test
	 *
	 * @param {Number} cols number of columns
	 * @param {Number} rows number of rows
	 * @param {String} headerPosition position of THs. "T" or "L" or "TL". "T" means top, "L" means left.
	 */
	handleTable: function(cols, rows, headerPositions) {
		var cur = this.rdom.getCurrentBlockElement();
		if(this.rdom.getParentElementOf(cur, ["TABLE"])) return true;
		
		var rtable = xq.RichTable.create(this.rdom, cols, rows, headerPositions);
		if(this.rdom.tree.isBlockContainer(cur)) {
			var wrappers = this.rdom.wrapAllInlineOrTextNodesAs("P", cur, true);
			cur = wrappers.last();
		}
		var tableDom = this.rdom.insertNodeAt(rtable.getDom(), cur, "after");
		this.rdom.placeCaretAtStartOf(rtable.getCellAt(0, 0));
		
		if(this.rdom.isEmptyBlock(cur)) this.rdom.deleteNode(cur, true);
		
		var historyAdded = this.editHistory.onCommand();
		this._fireOnCurrentContentChanged(this);
		
		return true;
	},
	
	handleInsertNewRowAt: function(where) {
		var cur = this.rdom.getCurrentBlockElement();
		var tr = this.rdom.getParentElementOf(cur, ["TR"]);
		if(!tr) return true;
		
		var table = this.rdom.getParentElementOf(tr, ["TABLE"]);
		var rtable = new xq.RichTable(this.rdom, table);
		var row = rtable.insertNewRowAt(tr, where);
		
		this.rdom.placeCaretAtStartOf(row.cells[0]);
		return true;
	},
	
	/**
	 * @TODO: Add selenium test
	 */
	handleInsertNewColumnAt: function(where) {
		var cur = this.rdom.getCurrentBlockElement();
		var td = this.rdom.getParentElementOf(cur, ["TD"], true);
		if(!td) return true;
		
		var table = this.rdom.getParentElementOf(td, ["TABLE"]);
		var rtable = new xq.RichTable(this.rdom, table);
		rtable.insertNewCellAt(td, where);
		
		this.rdom.placeCaretAtStartOf(cur);
		return true;
	},
	
	/**
	 * @TODO: Add selenium test
	 */
	handleDeleteRow: function() {
		var cur = this.rdom.getCurrentBlockElement();
		var tr = this.rdom.getParentElementOf(cur, ["TR"]);
		if(!tr) return true;

		var table = this.rdom.getParentElementOf(tr, ["TABLE"]);
		var rtable = new xq.RichTable(this.rdom, table);
		var blockToMove = rtable.deleteRow(tr);
		
		this.rdom.placeCaretAtStartOf(blockToMove);
		return true;
	},
	
	/**
	 * @TODO: Add selenium test
	 */
	handleDeleteColumn: function() {
		var cur = this.rdom.getCurrentBlockElement();
		var td = this.rdom.getParentElementOf(cur, ["TD"], true);
		if(!td) return true;

		var table = this.rdom.getParentElementOf(td, ["TABLE"]);
		var rtable = new xq.RichTable(this.rdom, table);
		rtable.deleteCell(td);

		//this.rdom.placeCaretAtStartOf(table);
		return true;
	},
	
	/**
	 * Performs block indentation
	 * @TODO: Add selenium test
	 */
	handleIndent: function() {
		if(this.rdom.hasSelection()) {
			var blocks = this.rdom.getBlockElementsAtSelectionEdge(true, true);
			if(blocks.first() !== blocks.last()) {
				var affected = this.rdom.indentElements(blocks.first(), blocks.last());
				this.rdom.selectBlocksBetween(affected.first(), affected.last());
				
				var historyAdded = this.editHistory.onCommand();
				this._fireOnCurrentContentChanged(this);
				
				return true;
			}
		}
		
		var block = this.rdom.getCurrentBlockElement();
		var affected = this.rdom.indentElement(block);
		
		if(affected) {
			this.rdom.placeCaretAtStartOf(affected);
			
			var historyAdded = this.editHistory.onCommand();
			this._fireOnCurrentContentChanged(this);
		}
		
		return true;
	},
	
	/**
	 * Performs block outdentation
	 * @TODO: Add selenium test
	 */
	handleOutdent: function() {
		if(this.rdom.hasSelection()) {
			var blocks = this.rdom.getBlockElementsAtSelectionEdge(true, true);
			if(blocks.first() !== blocks.last()) {
				var affected = this.rdom.outdentElements(blocks.first(), blocks.last());
				this.rdom.selectBlocksBetween(affected.first(), affected.last());
				
				var historyAdded = this.editHistory.onCommand();
				this._fireOnCurrentContentChanged(this);
				
				return true;
			}
		}
		
		var block = this.rdom.getCurrentBlockElement();
		var affected = this.rdom.outdentElement(block);
		
		if(affected) {
			this.rdom.placeCaretAtStartOf(affected);

			var historyAdded = this.editHistory.onCommand();
			this._fireOnCurrentContentChanged(this);
		}
		
		return true;
	},
	
	/**
	 * Applies list.
	 * @TODO: Add selenium test
	 *
	 * @param {String} type "UL" or "OL"
	 * @param {String} CSS class name
	 */
	handleList: function(type, className) {
		if(this.rdom.hasSelection()) {
			var blocks = this.rdom.getBlockElementsAtSelectionEdge(true, true);
			if(blocks.first() !== blocks.last()) {
				blocks = this.rdom.applyLists(blocks.first(), blocks.last(), type, className);
			} else {
				blocks[0] = blocks[1] = this.rdom.applyList(blocks.first(), type, className);
			}
			this.rdom.selectBlocksBetween(blocks.first(), blocks.last());
		} else {
			var block = this.rdom.applyList(this.rdom.getCurrentBlockElement(), type, className);
			this.rdom.placeCaretAtStartOf(block);
		}
		var historyAdded = this.editHistory.onCommand();
		this._fireOnCurrentContentChanged(this);
		
		return true;
	},
	
	/**
	 * Applies justification
	 * @TODO: Add selenium test
	 *
	 * @param {String} dir "left", "center", "right" or "both"
	 */
	handleJustify: function(dir) {
		if(this.rdom.hasSelection()) {
			var blocks = this.rdom.getSelectedBlockElements();
    		var dir = (dir === "left" || dir === "both") && (blocks[0].style.textAlign === "left" || blocks[0].style.textAlign === "") ? "both" : dir;
			this.rdom.justifyBlocks(blocks, dir);
			this.rdom.selectBlocksBetween(blocks.first(), blocks.last());
		} else {
    		var block = this.rdom.getCurrentBlockElement();
    		var dir = (dir === "left" || dir === "both") && (block.style.textAlign === "left" || block.style.textAlign === "") ? "both" : dir;
			this.rdom.justifyBlock(block, dir);
		}
		var historyAdded = this.editHistory.onCommand();
		this._fireOnCurrentContentChanged(this);
		
		return true;
	},
	
	/**
	 * Removes current block element
	 * @TODO: Add selenium test
	 */
	handleRemoveBlock: function() {
		var block = this.rdom.getCurrentBlockElement();
		var blockToMove = this.rdom.removeBlock(block);
		this.rdom.placeCaretAtStartOf(blockToMove);
		blockToMove.scrollIntoView(false);
		
		var historyAdded = this.editHistory.onCommand();
		this._fireOnCurrentContentChanged(this);
		
		return true;
	},
	
	/**
	 * Applies background color
	 * @TODO: Add selenium test
	 *
	 * @param {String} color CSS color string
	 */
	handleBackgroundColor: function(color) {
		if(color) {
			this.rdom.applyBackgroundColor(color);

			var historyAdded = this.editHistory.onCommand();
			this._fireOnCurrentContentChanged(this);
		} else {
			var dialog = new xq.ui.FormDialog(
				this,
				xq.ui_templates.basicColorPickerDialog,
				function(dialog) {},
				function(data) {
					this.focus();
					
					if(xq.Browser.isTrident) {
						var rng = this.rdom.rng();
						rng.moveToBookmark(bm);
						rng.select();
					}
					
					if(!data) return;
					
					this.handleBackgroundColor(data.color);
				}.bind(this)
			);
			
			if(xq.Browser.isTrident) var bm = this.rdom.rng().getBookmark();
			
			dialog.show({position: 'centerOfEditor'});
		}
		return true;
	},
	
	/**
	 * Applies foreground color
	 * @TODO: Add selenium test
	 *
	 * @param {String} color CSS color string
	 */
	handleForegroundColor: function(color) {
		if(color) {
			this.rdom.applyForegroundColor(color);
			
			var historyAdded = this.editHistory.onCommand();
			this._fireOnCurrentContentChanged(this);
		} else {
			var dialog = new xq.ui.FormDialog(
				this,
				xq.ui_templates.basicColorPickerDialog,
				function(dialog) {},
				function(data) {
					this.focus();
					
					if(xq.Browser.isTrident) {
						var rng = this.rdom.rng();
						rng.moveToBookmark(bm);
						rng.select();
					}
					
					if(!data) return;
					
					this.handleForegroundColor(data.color);
				}.bind(this)
			);
			
			if(xq.Browser.isTrident) var bm = this.rdom.rng().getBookmark();
			
			dialog.show({position: 'centerOfEditor'});
		}
		return true;
	},

	/**
	 * Applies font face
	 * @TODO: Add selenium test
	 *
	 * @param {String} face font face
	 */
	handleFontFace: function(face) {
		if(face) {
			this.rdom.applyFontFace(face);

			var historyAdded = this.editHistory.onCommand();
			this._fireOnCurrentContentChanged(this);
		} else {
			//TODO: popup font dialog
		}
		return true;
	},
	
	/**
	 * Applies font size
	 *
	 * @param {Number} font size (1 to 6)
	 */
	handleFontSize: function(size) {
		if(size) {
			this.rdom.applyFontSize(size);

			var historyAdded = this.editHistory.onCommand();
			this._fireOnCurrentContentChanged(this);
		} else {
			//TODO: popup font dialog
		}
		return true;
	},

	/**
	 * Applies superscription
	 * @TODO: Add selenium test
	 */	
	handleSuperscription: function() {
		this.rdom.applySuperscription();

		var historyAdded = this.editHistory.onCommand();
		this._fireOnCurrentContentChanged(this);

		return true;
	},
	
	/**
	 * Applies subscription
	 * @TODO: Add selenium test
	 */	
	handleSubscription: function() {
		this.rdom.applySubscription();

		var historyAdded = this.editHistory.onCommand();
		this._fireOnCurrentContentChanged(this);

		return true;
	},

	/**
	 * Change or wrap current block(or selected blocks)'s tag
	 * @TODO: Add selenium test
	 * 
	 * @param {String} [tagName] Name of tag. If not provided, it does not modify current tag name
	 * @param {String} [className] Class name of tag. If not provided, it does not modify current class name, and if empty string is provided, class attribute will be removed.  
	 */	
	handleApplyBlock: function(tagName, className) {
		if(!tagName && !className) return true;
		
		// if current selection contains multi-blocks
		if(this.rdom.hasSelection()) {
			var blocks = this.rdom.getBlockElementsAtSelectionEdge(true, true);
			if(blocks.first() !== blocks.last()) {
				var applied = this.rdom.applyTagIntoElements(tagName, blocks.first(), blocks.last(), className);
				this.rdom.selectBlocksBetween(applied.first(), applied.last());
				
				var historyAdded = this.editHistory.onCommand();
				this._fireOnCurrentContentChanged(this);
				
				return true;
			}
		}
		
		// else
		var block = this.rdom.getCurrentBlockElement();
		this.rdom.pushMarker();
		var applied =
			this.rdom.applyTagIntoElement(tagName, block, className) ||
			block;
		this.rdom.popMarker(true);
		
		if(this.rdom.isEmptyBlock(applied)) {
			this.rdom.correctEmptyElement(applied);
			this.rdom.placeCaretAtStartOf(applied);
		}
		
		var historyAdded = this.editHistory.onCommand();
		this._fireOnCurrentContentChanged(this);
		
		return true;
	},
	
	/**
	 * Inserts seperator (HR)
	 * @TODO: Add selenium test
	 */
	handleSeparator: function() {
		this.rdom.collapseSelection();
		
		var curBlock = this.rdom.getCurrentBlockElement();
		var atStart = this.rdom.isCaretAtBlockStart();
		if(this.rdom.tree.isBlockContainer(curBlock)) curBlock = this.rdom.wrapAllInlineOrTextNodesAs("P", curBlock, true)[0];
		
		this.rdom.insertNodeAt(this.rdom.createElement("HR"), curBlock, atStart ? "before" : "after");
		this.rdom.placeCaretAtStartOf(curBlock);

		// add undo history
		var historyAdded = this.editHistory.onCommand();
		this._fireOnCurrentContentChanged(this);
		
		return true;
	},
	
	/**
	 * Performs UNDO
	 * @TODO: Add selenium test
	 */
	handleUndo: function() {
		var performed = this.editHistory.undo();
		this._fireOnCurrentContentChanged(this);
		
		var curBlock = this.rdom.getCurrentBlockElement();
		if(!xq.Browser.isTrident && curBlock) {
			curBlock.scrollIntoView(false);
		}
		return true;
	},
	
	/**
	 * Performs REDO
	 * @TODO: Add selenium test
	 */
	handleRedo: function() {
		var performed = this.editHistory.redo();
		this._fireOnCurrentContentChanged(this);
		
		var curBlock = this.rdom.getCurrentBlockElement();
		if(!xq.Browser.isTrident && curBlock) {
			curBlock.scrollIntoView(false);
		}
		return true;
	},
	
	
	
	_handleContextMenu: function(e) {
		if (xq.Browser.isWebkit) {
			if (e.metaKey || xq.isLeftClick(e)) return false;
		} else if (e.shiftKey || e.ctrlKey || e.altKey) {
			return false;
		}
		
		var point = xq.getEventPoint(e);
		var x = point.x;
		var y = point.y;

		var pos = xq.getCumulativeOffset(this.wysiwygEditorDiv);
		x += pos.left;
		y += pos.top;
		this._contextMenuTargetElement = e.target || e.srcElement;
		
		if (!xq.Browser.isTrident) {
			var doc = this.getDoc();
			var body = this.getBody();
			
			x -= doc.documentElement.scrollLeft;
			y -= doc.documentElement.scrollTop;
			
			x -= body.scrollLeft;
			y -= body.scrollTop;
		}
		
		for(var cmh in this.config.contextMenuHandlers) {
			var stop = this.config.contextMenuHandlers[cmh].handler(this, this._contextMenuTargetElement, x, y);
			if(stop) {
				xq.stopEvent(e);
				return true;
			}
		}
		
		return false;
	},
	
	showContextMenu: function(menuItems, x, y) {
		if (!menuItems || menuItems.length <= 0) return;
		
		if (!this.contextMenuContainer) {
			this.contextMenuContainer = this.doc.createElement('UL');
			this.contextMenuContainer.className = 'xqContextMenu';
			this.contextMenuContainer.style.display='none';
			
			xq.observe(this.doc, 'click', this._contextMenuClicked.bindAsEventListener(this));
			xq.observe(this.rdom.getDoc(), 'click', this.hideContextMenu.bindAsEventListener(this));
			
			this.body.appendChild(this.contextMenuContainer);
		} else {
			while (this.contextMenuContainer.childNodes.length > 0)
				this.contextMenuContainer.removeChild(this.contextMenuContainer.childNodes[0]);
		}
		
		for (var i=0; i < menuItems.length; i++) {
			menuItems[i]._node = this._addContextMenuItem(menuItems[i]);
		}

		this.contextMenuContainer.style.display='block';
		this.contextMenuContainer.style.left = Math.min(Math.max(this.doc.body.scrollWidth, this.doc.documentElement.clientWidth) - this.contextMenuContainer.offsetWidth, x) + 'px';
		this.contextMenuContainer.style.top = Math.min(Math.max(this.doc.body.scrollHeight, this.doc.documentElement.clientHeight) - this.contextMenuContainer.offsetHeight, y) + 'px';

		this.contextMenuItems = menuItems;
	},
	
	hideContextMenu: function() {
		if (this.contextMenuContainer)
			this.contextMenuContainer.style.display='none';
	},
	
	_addContextMenuItem: function(item) {
		if (!this.contextMenuContainer) throw "No conext menu container exists";
		
		var node = this.doc.createElement('LI');
		if (item.disabled) node.className += ' disabled'; 
		
		if (item.title === '----') {
			node.innerHTML = '&nbsp;';
			node.className = 'separator';
		} else {
			if(item.handler) {
				node.innerHTML = '<a href="#" onclick="return false;">'+(item.title.toString().escapeHTML())+'</a>';
			} else {
				node.innerHTML = (item.title.toString().escapeHTML());
			}
		}
		
		if(item.className) node.className = item.className;
		
		this.contextMenuContainer.appendChild(node);
		
		return node;
	},
	
	_contextMenuClicked: function(e) {
		this.hideContextMenu();
		
		if (!this.contextMenuContainer) return;
		
		var node = e.srcElement || e.target;
		while(node && node.nodeName !== "LI") {
			node = node.parentNode;
		}
		if (!node || !this.rdom.tree.isDescendantOf(this.contextMenuContainer, node)) return;

		for (var i=0; i < this.contextMenuItems.length; i++) {
			if (this.contextMenuItems[i]._node === node) {
				var handler = this.contextMenuItems[i].handler;
				if (!this.contextMenuItems[i].disabled && handler) {
					var xed = this;
					var element = this._contextMenuTargetElement;
					if(typeof handler === "function") {
						handler(xed, element);
					} else {
						eval(handler);
					}
				}
				break;
			}
		}
	},
	
	/**
	 * Inserts HTML template
	 * @TODO: Add selenium test
	 *
	 * @param {String} html Template string. It should have single root element
	 * @returns {Element} inserted element
	 */
	insertTemplate: function(html) {
		return this.rdom.insertHtml(this._processTemplate(html));
	},
	
	/**
	 * Places given HTML template nearby target.
	 * @TODO: Add selenium test
	 *
	 * @param {String} html Template string. It should have single root element
	 * @param {Node} target Target node.
	 * @param {String} where Possible values: "before", "start", "end", "after"
	 *
	 * @returns {Element} Inserted element.
	 */
	insertTemplateAt: function(html, target, where) {
		return this.rdom.insertHtmlAt(this._processTemplate(html), target, where);
	},
	
	_processTemplate: function(html) {
		// apply template processors
		var tps = this.getTemplateProcessors();
		for(var key in tps) {
			var value = tps[key];
			html = value.handler(html);
		}
		
		// remove all whitespace characters between block tags
		return this.removeUnnecessarySpaces(html);
	},
	
	
	
	/** @private */
	_handleEnterAtEmptyBlock: function() {
		var block = this.rdom.getCurrentBlockElement();
		if(this.rdom.tree.isTableCell(block) && this.rdom.isFirstBlockOfBody(block)) {
			block = this.rdom.insertNodeAt(this.rdom.makeEmptyParagraph(), this.rdom.getRoot(), "start");
		} else {
			block = 
				this.rdom.outdentElement(block) ||
				this.rdom.extractOutElementFromParent(block) ||
				this.rdom.replaceTag("P", block) ||
				this.rdom.insertNewBlockAround(block);
		}
		
		this.rdom.placeCaretAtStartOf(block);
		if(!xq.Browser.isTrident) block.scrollIntoView(false);
	},
	
	/** @private */
	_handleEnterAtEdge: function(atStart, forceInsertParagraph) {
		var block = this.rdom.getCurrentBlockElement();
		var blockToPlaceCaret;
		
		if(atStart && this.rdom.isFirstBlockOfBody(block)) {
			blockToPlaceCaret = this.rdom.insertNodeAt(this.rdom.makeEmptyParagraph(), this.rdom.getRoot(), "start");
		} else {
			if(this.rdom.tree.isTableCell(block)) forceInsertParagraph = true;
			var newBlock = this.rdom.insertNewBlockAround(block, atStart, forceInsertParagraph ? "P" : null);
			blockToPlaceCaret = !atStart ? newBlock : newBlock.nextSibling;
		}
		
		this.rdom.placeCaretAtStartOf(blockToPlaceCaret);
		if(!xq.Browser.isTrident) blockToPlaceCaret.scrollIntoView(false);
	},
	
	/**
	 * Replace URL text nearby caret into a link
	 * @TODO: Add selenium test
	 */
	replaceUrlToLink: function() {
		// If there's link nearby caret, nothing happens
		if(this.rdom.getParentElementOf(this.rdom.getCurrentElement(), ["A"])) return;
		
		var marker = this.rdom.pushMarker();
		var criteria = function(text) {
			var m = /(http|https|ftp|mailto)\:\/\/[^\s]+$/.exec(text);
			return m ? m.index : -1;
		};
		
		var test = this.rdom.testSmartWrap(marker, criteria);
		if(test.textIndex !== -1) {
			var a = this.rdom.smartWrap(marker, "A", criteria);
			a.href = encodeURI(test.text);
		}
		this.rdom.popMarker(true);
	}
});
/**
 * @namespace
 */
xq.macro = {};

/**
 * @requires Xquared.js
 */
xq.macro.Base = xq.Class(/** @lends xq.macro.Base.prototype */{
	/**
     * @constructs
     *
     * @param {Object} Parameters or HTML fragment.
     * @param {String} URL to place holder image.
	 */
	initialize: function(id, paramsOrHtml, placeHolderImgSrc) {
		this.id = id;
		this.placeHolderImgSrc = placeHolderImgSrc;
		
		if(typeof paramsOrHtml === "string") {
			this.html = paramsOrHtml;
			this.params = {};
			
			this.initFromHtml();
		} else {
			this.html = null;
			this.params = paramsOrHtml;
			
			this.initFromParams();
		}
	},
	
	initFromHtml: function() {},
	initFromParams: function() {},
	createHtml: function() {throw "Not implemented";},
	onLayerInitialzied: function(layer) {},
	
	createPlaceHolderHtml: function() {
		var size = {width: 5, height: 5};
		var def = {};
		def.id = this.id;
		def.params = this.params;
		
		sb = [];
		sb.push('<img ');
		sb.push(	'class="xqlayer" ');
		sb.push(	'src="' + this.placeHolderImgSrc + '" ');
		sb.push(	'width="' + (size.width + 4) + '" height="' + (size.height + 4) + '" ');
		sb.push(	'longdesc="' + escape(JSON.stringify(def)) + '" ');
		sb.push(	'style="border: 1px solid #ccc" ');
		sb.push('/>');
		
		return sb.join('');
	}
})
/**
 * @requires Xquared.js
 * @requires macro/Base.js
 */
xq.macro.Factory = xq.Class(/** @lends xq.macro.Factory.prototype */{
	/**
     * @constructs
     *
     * @param {String} URL to place holder image.
	 */
	initialize: function(placeHolderImgSrc) {
		this.placeHolderImgSrc = placeHolderImgSrc;
		this.macroClazzes = {};
	},
	/**
	 * Registers new macro by ID.
	 *
	 * @param {String} id Macro id.
	 */
	register: function(id) {
		var clazz = xq.macro[id + "Macro"];
		if(!clazz) throw "Unknown macro id: [" + id + "]";
		
		this.macroClazzes[id] = clazz;
	},
	/**
	 * Creates macro instance by given HTML fragment.
	 *
	 * @param {String} html HTML fragment.
	 * @returns {xq.macro.Base} Macro instance or null if recognization of the HTML fragment fails.
	 */
	createMacroFromHtml: function(html) {
		for(var id in this.macroClazzes) {
			var clazz = this.macroClazzes[id];
			if(clazz.recognize(html)) return new clazz(id, html, this.placeHolderImgSrc);
		}
		return null;
	},
	/**
	 * Creates macro instance by given macro definition.
	 *
	 * @param {Object} def Macro definition.
	 * @returns {xq.macro.Base} Macro instance
	 * @throws If macro not found by def[id].
	 */
	createMacroFromDefinition: function(def) {
		var clazz = this.macroClazzes[def.id];
		if(!clazz) return null;
		
		return new clazz(def.id, def.params, this.placeHolderImgSrc);
	}
})
/**
 * @requires Xquared.js
 * @requires Editor.js
 */
xq.Layer = xq.Class(/** @lends xq.Layer.prototype */{
	/**
     * @constructs
     *
     * @param {xq.Editor} editor editor instance
     * @param {Element} element designMode document's element. Layer instance will be attached to this element
     * @param {String} html HTML for body.
	 */
	initialize: function(editor, element, html) {
		xq.addToFinalizeQueue(this);
		
		this.margin = 4;
		this.editor = editor;
		this.element = element;
		this.frame = this.editor._createIFrame(this.editor.getOuterDoc(), this.element.offsetWidth - (this.margin * 2) + "px", this.element.offsetHeight + (this.margin * 2) + "px");
		this.editor.getOuterDoc().body.appendChild(this.frame);
		this.doc = editor._createDoc(
			this.frame,
			'<style type="text/css">html, body {margin:0px; padding:0px; background-color: transparent; width: 100%; height: 100%; overflow: hidden;}</style>',
			[], null, null, html
		);
		this.frame.style.position = "absolute";
		this.updatePosition();
	},
	
	getFrame: function() {
		return this.frame;
	},
	
	getDoc: function() {
		return this.doc;
	},
	
	getBody: function() {
		return this.doc.body;
	},
	
	isValid: function() {
		return this.element && this.element.parentNode && this.element.offsetParent;
	},
	
	detach: function() {
		this.frame.parentNode.removeChild(this.frame);
		
		this.frame = null;
		this.element = null;
	},
	
	updatePosition: function() {
		// calculate element position
		var offset = xq.getCumulativeOffset(this.element, this.editor.rdom.getRoot());
		
		// and scroll position
		var doc = this.editor.getDoc();
		var body = this.editor.getBody();
		offset.left -= doc.documentElement.scrollLeft + body.scrollLeft - this.margin;
		offset.top -= doc.documentElement.scrollTop + body.scrollTop - this.margin;
		
		// apply new position
		this.frame.style.left = offset.left + "px";
		this.frame.style.top = offset.top + "px";
		
		// perform autofit
		var newWidth = this.doc.body.scrollWidth + (this.margin - 1) * 2;
		var newHeight = this.doc.body.scrollHeight + (this.margin - 1) * 2;
			
		// without -1, the element increasing slowly. 
		this.element.width = newWidth;
		this.element.height = newHeight;
		
		// resize frame
		this.frame.style.width = this.element.offsetWidth - (this.margin * 2) + "px";
		this.frame.style.height = this.element.offsetHeight - (this.margin * 2) + "px";
	}
});

/*
    json2.js
    2008-02-14

    Public Domain

    No warranty expressed or implied. Use at your own risk.

    See http://www.JSON.org/js.html

    This file creates a global JSON object containing two methods:

        JSON.stringify(value, whitelist)
            value       any JavaScript value, usually an object or array.

            whitelist   an optional array parameter that determines how object
                        values are stringified.

            This method produces a JSON text from a JavaScript value.
            There are three possible ways to stringify an object, depending
            on the optional whitelist parameter.

            If an object has a toJSON method, then the toJSON() method will be
            called. The value returned from the toJSON method will be
            stringified.

            Otherwise, if the optional whitelist parameter is an array, then
            the elements of the array will be used to select members of the
            object for stringification.

            Otherwise, if there is no whitelist parameter, then all of the
            members of the object will be stringified.

            Values that do not have JSON representaions, such as undefined or
            functions, will not be serialized. Such values in objects will be
            dropped; in arrays will be replaced with null.
            JSON.stringify(undefined) returns undefined. Dates will be
            stringified as quoted ISO dates.

            Example:

            var text = JSON.stringify(['e', {pluribus: 'unum'}]);
            // text is '["e",{"pluribus":"unum"}]'

        JSON.parse(text, filter)
            This method parses a JSON text to produce an object or
            array. It can throw a SyntaxError exception.

            The optional filter parameter is a function that can filter and
            transform the results. It receives each of the keys and values, and
            its return value is used instead of the original value. If it
            returns what it received, then structure is not modified. If it
            returns undefined then the member is deleted.

            Example:

            // Parse the text. If a key contains the string 'date' then
            // convert the value to a date.

            myData = JSON.parse(text, function (key, value) {
                return key.indexOf('date') >= 0 ? new Date(value) : value;
            });

    This is a reference implementation. You are free to copy, modify, or
    redistribute.

    Use your own copy. It is extremely unwise to load third party
    code into your pages.
*/

/*jslint evil: true */

/*global JSON */

/*members "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
    charCodeAt, floor, getUTCDate, getUTCFullYear, getUTCHours,
    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join, length,
    parse, propertyIsEnumerable, prototype, push, replace, stringify, test,
    toJSON, toString
*/

if (!this.JSON) {

    JSON = function () {

        function f(n) {    // Format integers to have at least two digits.
            return n < 10 ? '0' + n : n;
        }

        Date.prototype.toJSON = function () {

// Eventually, this method will be based on the date.toISOString method.

            return this.getUTCFullYear()   + '-' +
                 f(this.getUTCMonth() + 1) + '-' +
                 f(this.getUTCDate())      + 'T' +
                 f(this.getUTCHours())     + ':' +
                 f(this.getUTCMinutes())   + ':' +
                 f(this.getUTCSeconds())   + 'Z';
        };


        var m = {    // table of character substitutions
            '\b': '\\b',
            '\t': '\\t',
            '\n': '\\n',
            '\f': '\\f',
            '\r': '\\r',
            '"' : '\\"',
            '\\': '\\\\'
        };

        function stringify(value, whitelist) {
            var a,          // The array holding the partial texts.
                i,          // The loop counter.
                k,          // The member key.
                l,          // Length.
                r = /["\\\x00-\x1f\x7f-\x9f]/g,
                v;          // The member value.

            switch (typeof value) {
            case 'string':

// If the string contains no control characters, no quote characters, and no
// backslash characters, then we can safely slap some quotes around it.
// Otherwise we must also replace the offending characters with safe sequences.

                return r.test(value) ?
                    '"' + value.replace(r, function (a) {
                        var c = m[a];
                        if (c) {
                            return c;
                        }
                        c = a.charCodeAt();
                        return '\\u00' + Math.floor(c / 16).toString(16) +
                                                   (c % 16).toString(16);
                    }) + '"' :
                    '"' + value + '"';

            case 'number':

// JSON numbers must be finite. Encode non-finite numbers as null.

                return isFinite(value) ? String(value) : 'null';

            case 'boolean':
            case 'null':
                return String(value);

            case 'object':

// Due to a specification blunder in ECMAScript,
// typeof null is 'object', so watch out for that case.

                if (!value) {
                    return 'null';
                }

// If the object has a toJSON method, call it, and stringify the result.

                if (typeof value.toJSON === 'function') {
                    return stringify(value.toJSON());
                }
                a = [];
                if (typeof value.length === 'number' &&
                        !(value.propertyIsEnumerable('length'))) {

// The object is an array. Stringify every element. Use null as a placeholder
// for non-JSON values.

                    l = value.length;
                    for (i = 0; i < l; i += 1) {
                        a.push(stringify(value[i], whitelist) || 'null');
                    }

// Join all of the elements together and wrap them in brackets.

                    return '[' + a.join(',') + ']';
                }
                if (whitelist) {

// If a whitelist (array of keys) is provided, use it to select the components
// of the object.

                    l = whitelist.length;
                    for (i = 0; i < l; i += 1) {
                        k = whitelist[i];
                        if (typeof k === 'string') {
                            v = stringify(value[k], whitelist);
                            if (v) {
                                a.push(stringify(k) + ':' + v);
                            }
                        }
                    }
                } else {

// Otherwise, iterate through all of the keys in the object.

                    for (k in value) {
                        if (typeof k === 'string') {
                            v = stringify(value[k], whitelist);
                            if (v) {
                                a.push(stringify(k) + ':' + v);
                            }
                        }
                    }
                }

// Join all of the member texts together and wrap them in braces.

                return '{' + a.join(',') + '}';
            }
        }

        return {
            stringify: stringify,
            parse: function (text, filter) {
                var j;

                function walk(k, v) {
                    var i, n;
                    if (v && typeof v === 'object') {
                        for (i in v) {
                            if (Object.prototype.hasOwnProperty.apply(v, [i])) {
                                n = walk(i, v[i]);
                                if (n !== undefined) {
                                    v[i] = n;
                                } else {
                                    delete v[i];
                                }
                            }
                        }
                    }
                    return filter(k, v);
                }


// Parsing happens in three stages. In the first stage, we run the text against
// regular expressions that look for non-JSON patterns. We are especially
// concerned with '()' and 'new' because they can cause invocation, and '='
// because it can cause mutation. But just to be safe, we want to reject all
// unexpected forms.

// We split the first stage into 4 regexp operations in order to work around
// crippling inefficiencies in IE's and Safari's regexp engines. First we
// replace all backslash pairs with '@' (a non-JSON character). Second, we
// replace all simple value tokens with ']' characters. Third, we delete all
// open brackets that follow a colon or comma or that begin the text. Finally,
// we look to see that the remaining characters are only whitespace or ']' or
// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.

                if (/^[\],:{}\s]*$/.test(text.replace(/\\./g, '@').
replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').
replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {

// In the second stage we use the eval function to compile the text into a
// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
// in JavaScript: it can begin a block or an object literal. We wrap the text
// in parens to eliminate the ambiguity.

                    j = eval('(' + text + ')');

// In the optional third stage, we recursively walk the new structure, passing
// each name/value pair to a filter function for possible transformation.

                    return typeof filter === 'function' ? walk('', j) : j;
                }

// If the text is not JSON parseable, then a SyntaxError is thrown.

                throw new SyntaxError('parseJSON');
            }
        };
    }();
}

/**
 * @requires Xquared.js
 * @requires Browser.js
 * @requires Editor.js
 * 
 * @requires macro/Factory.js
 * @requires Layer.js
 * @requires Json2.js
 * 
 * @requires plugin/Base.js
 */
xq.plugin.MacroPlugin = xq.Class(xq.plugin.Base,
	/**
	 * @name xq.plugin.MacroPlugin
	 * @lends xq.plugin.MacroPlugin.prototype
	 * @extends xq.plugin.Base
	 * @constructor
	 */
	{
	isEventListener: function() {return true;},
	
	onAfterLoad: function(xed) {
		this.xed = xed;
		this.xed.config.macroIds = [];
		this.layers = [];
	},
	
	onEditorStartInitialization: function(xed) {
		this.xed.validator.addListener(this);
		
		this.xed.macroFactory = new xq.macro.Factory(this.xed.config.imagePathForContent + 'placeholder.gif');
		for(var i = 0; i < this.xed.config.macroIds.length; i++) {
			this.xed.macroFactory.register(this.xed.config.macroIds[i]);
		}

		xed.timer.register(this.updateLayers.bind(this), 100);
		xed.timer.register(this.updateLayerList.bind(this), 2000);
	},
	
	/**
	 * @param {Element} [placeHolder] place holder element
	 */
	attachMacro: function(element) {
		var longdesc = element.getAttribute("longdesc") || element.longdesc;
		var def = JSON.parse(unescape(longdesc));
		var macro = this.xed.macroFactory.createMacroFromDefinition(def);
		var layer = new xq.Layer(this.xed, element, macro.createHtml());
		macro.onLayerInitialzied(layer);
		this.layers.push(layer);
	},
	
	isAttachedPlaceHolder: function(element) {
		for(var i = 0; i < this.layers.length; i++) {
			if(this.layers[i].element === element) return true;
		}
		return false;
	},

	updateLayerList: function() {
		if(this.xed.getCurrentEditMode() !== 'wysiwyg') {
			for(var i = 0; i < this.layers.length; i++) {
				this.layers[i].detach();
			}
			this.layers = [];
		} else {
			var placeHolders = xq.getElementsByClassName(this.xed.rdom.getRoot(), "xqlayer", xq.Browser.isTrident ? "img" : null);
			for(var i = 0; i < placeHolders.length; i++) {
				if(!this.isAttachedPlaceHolder(placeHolders[i])) {
					this.attachMacro(placeHolders[i]);
				}
			}
		}
	},
		
	/**
	 * Updates all layers immediately. If there're invalid layers, detachs and removes them.
	 */
	updateLayers: function() {
		if(this.xed.getCurrentEditMode() !== 'wysiwyg') return;
		
		for(var i = 0; i < this.layers.length; i++) {
			var layer = this.layers[i];
			if(layer.isValid()) {
				layer.updatePosition();
			} else {
				layer.detach();
				this.layers.splice(i, 1);
			}
		}
	},

	onValidatorPreprocessing: function(html) {
		var p = xq.compilePattern("<(IFRAME|SCRIPT|OBJECT|EMBED)\\s+[^>]+(?:/>|>.*?</(?:IFRAME|SCRIPT|OBJECT|EMBED)>)", "img");
		html.value = html.value.replace(p, function(str, tag) {
			var macro = this.xed.macroFactory.createMacroFromHtml(str);
			return macro ? macro.createPlaceHolderHtml() : "";
		}.bind(this));
	},
	
	onValidatorAfterStringValidation: function(html) {
		var p1 = /<img\s+[^>]*class="xqlayer"\s+[^>]*\/>/mg;
		var p2 = /<img\s+[^>]*longdesc="(.+?)"\s+[^>]*\/>/m;
		
		html.value = html.value.replace(p1, function(img) {
			var def = JSON.parse(unescape(img.match(p2)[1]));
			var macro = this.xed.macroFactory.createMacroFromDefinition(def);
			return macro.createHtml();
		}.bind(this));
	}
});
/**
 * @requires macro/Base.js
 */
xq.macro.FlashMovieMacro = xq.Class(xq.macro.Base,
	/**
	 * Flash movie macro
	 * 
	 * @name xq.macro.FlashMovieMacro
	 * @lends xq.macro.FlashMovieMacro.prototype
	 * @extends xq.macro.Base
	 * @constructor
	 */
	{
	initFromHtml: function() {
		this.params.html = this.html;
	},
	initFromParams: function() {
		if(!xq.macro.FlashMovieMacro.recognize(this.params.html)) throw "Unknown src";
	},
	createHtml: function() {
		return this.params.html;
	}
});
xq.macro.FlashMovieMacro.recognize = function(html) {
	var providers = {
		tvpot: /http:\/\/flvs\.daum\.net\/flvPlayer\.swf\?/,
		youtube: /http:\/\/(?:www\.)?youtube\.com\/v\//,
		pandoratv: /http:\/\/flvr\.pandora\.tv\/flv2pan\/flvmovie\.dll\?/,
		pandoratv2: /http:\/\/imgcdn\.pandora\.tv\/gplayer\/pandora\_EGplayer\.swf\?/,
		mncast: /http:\/\/dory\.mncast\.com\/mncHMovie\.swf\?/,
		yahoo: /http:\/\/d\.yimg\.com\//
	};
	
	for(var id in providers) {
		if(html.match(providers[id])) return true;
	}
	
	return false;
}
/**
 * @requires Xquared.js
 * @requires Browser.js
 * @requires Editor.js
 * @requires plugin/Base.js
 * @requires ui/Control.js
 * @requires macro/Factory.js
 * @requires macro/FlashMovieMacro.js
 */
xq.plugin.FlashMovieMacroPlugin = xq.Class(xq.plugin.Base,
	/**
	 * @name xq.plugin.FlashMovieMacroPlugin
	 * @lends xq.plugin.FlashMovieMacroPlugin.prototype
	 * @extends xq.plugin.Base
	 * @constructor
	 */
	{
	onAfterLoad: function(xed) {
		xed.config.macroIds.push("FlashMovie");
		xed.config.defaultToolbarButtonGroups.insert.push(
			{className:"movie", title:"Movie", handler:"xed.handleMovie()"}
		)
		
		xed.handleInsertMovie = function(html) {
			var macro = this.macroFactory.createMacroFromDefinition({id:"FlashMovie", params:{html:html}});
			if(macro) {
				var placeHolder = macro.createPlaceHolderHtml();
				this.rdom.insertHtml(placeHolder);

				var historyAdded = this.editHistory.onCommand();
				this._fireOnCurrentContentChanged(this);
			} else {
				alert("Unknown URL pattern");
			}
			return true;
		};
		
		xed.handleMovie = function() {
			var dialog = new xq.ui.FormDialog(
				this,
				xq.ui_templates.basicMovieDialog,
				function(dialog) {},
				function(data) {
					this.focus();
					
					if(xq.Browser.isTrident) {
						var rng = this.rdom.rng();
						rng.moveToBookmark(bm);
						rng.select();
					}
					
					// cancel?
					if(!data) return;
					
					this.handleInsertMovie(data.html);
				}.bind(this)
			);

			if(xq.Browser.isTrident) var bm = this.rdom.rng().getBookmark();
			dialog.show({position: 'centerOfEditor'});
			
			return true;
		}
	}
});
/**
 * @requires macro/Base.js
 */
xq.macro.IFrameMacro = xq.Class(xq.macro.Base,
	/**
	 * IFrame macro
	 * 
	 * @name xq.macro.IFrameMacro
	 * @lends xq.macro.IFrameMacro.prototype
	 * @extends xq.macro.Base
	 * @constructor
	 */
	{
	initFromHtml: function() {
		this.params.html = this.html;
	},
	initFromParams: function() {
		if(this.params.html) return;
		
		var sb = [];
		sb.push('<iframe');
		for(var attrName in this.params) {
			var attrValue = this.params[attrName];
			if(attrValue) sb.push(' ' + attrName.substring("p_".length) + '="' + attrValue + '"');
		}
		sb.push('></iframe>');
		this.params = {html:sb.join("")};
	},
	createHtml: function() {
		return this.params.html;
	}
});
xq.macro.IFrameMacro.recognize = function(html) {
	var p = xq.compilePattern("<IFRAME\\s+[^>]+(?:/>|>.*?</(?:IFRAME)>)", "img");
	return !!html.match(p);
}
/**
 * @requires Xquared.js
 * @requires Browser.js
 * @requires Editor.js
 * @requires plugin/Base.js
 * @requires ui/Control.js
 * @requires macro/Factory.js
 * @requires macro/IFrameMacro.js
 */
xq.plugin.IFrameMacroPlugin = xq.Class(xq.plugin.Base,
	/**
	 * @name xq.plugin.IFrameMacroPlugin
	 * @lends xq.plugin.IFrameMacroPlugin.prototype
	 * @extends xq.plugin.Base
	 * @constructor
	 */
	{
	onAfterLoad: function(xed) {
		xed.config.macroIds.push("IFrame");
		xed.config.defaultToolbarButtonGroups.insert.push(
			{className:"iframe", title:"IFrame", handler:"xed.handleIFrame()"}
		)
		
		xed.handleIFrame = function() {
			var dialog = new xq.ui.FormDialog(
					this,
					xq.ui_templates.basicIFrameDialog,
					function(dialog) {},
					function(data) {
						this.focus();
						
						// cancel?
						if(!data) return;
						
						var macro = this.macroFactory.createMacroFromDefinition({id:"IFrame", params:data});
						if(macro) {
							var placeHolder = macro.createPlaceHolderHtml();
							this.rdom.insertHtml(placeHolder);
						} else {
							alert("Unknown error");
						}
					}.bind(this)
			);
			
			dialog.show({position: 'centerOfEditor'});
			
			return true;
		}
	}
});
/**
 * @requires macro/Base.js
 */
xq.macro.JavascriptMacro = xq.Class(xq.macro.Base,
	/**
	 * Javascript macro
	 * 
	 * @name xq.macro.JavascriptMacro
	 * @lends xq.macro.JavascriptMacro.prototype
	 * @extends xq.macro.Base
	 * @constructor
	 */
	{
	initFromHtml: function() {
		var p = xq.compilePattern("src=[\"'](.+?)[\"']", "img");
		this.params.url = p.exec(this.html)[1];
	},
	initFromParams: function() {
		if(!xq.macro.JavascriptMacro.isSafeScript(this.params.url)) throw "Unknown src";
	},
	createHtml: function() {return '<script type="text/javascript" src="' + this.params.url + '"></script>'},
	
	onLayerInitialzied: function(layer) {
		layer.getDoc().write(this.createHtml());
	}
});

xq.macro.JavascriptMacro.recognize = function(html) {
	var p = xq.compilePattern("<SCRIPT\\s+[^>]*src=[\"']([^\"']+)[\"'][^>]*(?:/>|>.*?</(?:SCRIPT)>)", "img");
	var m = p.exec(html);
	if(!m || !m[1]) return false;
	return this.isSafeScript(m[1]);
}
xq.macro.JavascriptMacro.isSafeScript = function(url) {
	var safeSrcs = {
		googleGadget: /http:\/\/gmodules\.com\/ig\/ifr\?/img
	};
	for(var id in safeSrcs) {
		if(url.match(safeSrcs[id])) return true;
	}
	return false;
}

/**
 * @requires Xquared.js
 * @requires Browser.js
 * @requires Editor.js
 * @requires plugin/Base.js
 * @requires ui/Control.js
 * @requires macro/Factory.js
 * @requires macro/JavascriptMacro.js
 */
xq.plugin.JavascriptMacroPlugin = xq.Class(xq.plugin.Base,
	/**
	 * @name xq.plugin.JavascriptMacroPlugin
	 * @lends xq.plugin.JavascriptMacroPlugin.prototype
	 * @extends xq.plugin.Base
	 * @constructor
	 */
	{
	onAfterLoad: function(xed) {
		xed.config.macroIds.push("Javascript");
		xed.config.defaultToolbarButtonGroups.insert.push(
			{className:"script", title:"Script", handler:"xed.handleScript()"}
		)
		
		xed.handleInsertScript = function(url) {
			var params = {url: url};
			var macro = this.macroFactory.createMacroFromDefinition({id:"Javascript", params:params});
			if(macro) {
				var placeHolder = macro.createPlaceHolderHtml();
				this.rdom.insertHtml(placeHolder);

				var historyAdded = this.editHistory.onCommand();
				this._fireOnCurrentContentChanged(this);
			} else {
				alert("Unknown URL pattern");
			}
			return true;
		};
		
		xed.handleScript = function() {
			var dialog = new xq.ui.FormDialog(
				this,
				xq.ui_templates.basicScriptDialog,
				function(dialog) {},
				function(data) {
					this.focus();
					
					if(xq.Browser.isTrident) {
						var rng = this.rdom.rng();
						rng.moveToBookmark(bm);
						rng.select();
					}
					
					// cancel?
					if(!data) return;
					
					this.handleInsertScript(data.url);
				}.bind(this)
			);

			if(xq.Browser.isTrident) var bm = this.rdom.rng().getBookmark();
			dialog.show({position: 'centerOfEditor'});
			
			return true;
		}
	}
});
/**
 * @requires Xquared.js
 * @requires Editor.js
 * @requires plugin/MacroPlugin.js
 * @requires plugin/FlashMovieMacroPlugin.js
 * @requires plugin/IFrameMacroPlugin.js
 * @requires plugin/JavascriptMacroPlugin.js
 */
xq.moduleName = "Full";