//Editor = Class.create();

var Editor = {
	document : function(){
		//return this.iframe.contentWindow.document;
		var oDoc = this.iframe.contentWindow || this.iframe.contentDocument;
		if (oDoc.document){
			oDoc = oDoc.document;
		}
		return oDoc;
	},
	activeElement : function(){
		var parent = null;
		
		if (sel = this.document().selection){
			/* IE selections */
			
			try{
				parent = sel.createRange().parentElement();
			}catch(e){
				return false;
			}
		}else{
			/* Mozilla selections */
			
			try{
				sel = this.iframe.contentWindow.getSelection();
				parent = sel.getRangeAt(0).commonAncestorContainer;
			}catch (e){
				return false;
			}
		}
		
		while (parent.nodeType == 3){
			parent = parent.parentNode;
		}
		
		return parent;
	},
	save : function(){
		id = $('page-id').value;
		new Ajax.Updater('page', '/page/save/' + id, {
			parameters : 'content=' + escape(Editor.document().body.innerHTML),
			onComplete : function(){
				Behaviour.apply();
			}
		});
	},	
	initialize : function(page){
		a = document.createElement("a");
		a.innerHTML = 'Edit';
		a.href = "#";
		a.onclick = function(){
			Editor.edit(document.getElementById("content"));

			a = document.createElement("a");
			a.innerHTML = 'Save';
			a.href = "#";
			
			a.onclick = function(){
				Editor.save();
				return false;
			}

			with ($('edit')){
				innerHTML = "";
				appendChild(a);
			}
			
			return false;
		}
		
		with ($('edit')){
			innerHTML = "";
			appendChild(a);
		}
		
		//new Effect.Appear(a);
	},
	edit : function(div){
		// Build the iframe
		var h = parseInt(self.innerHeight?self.innerHeight:document.documentElement.clientHeight) - 140;
		
		with (this.iframe = document.createElement("iframe")){
			style.cssText = "height: " + h + "px";
		}
		
		this.createToolbar();

		upload = document.createElement("div");
		upload.id = "upload";
		
		// Add the new elements to the DOM
		with (div.parentNode){
			insertBefore(this.iframe, div);
			insertBefore(this.toolbar, this.iframe);
			insertBefore(upload, this.iframe);
			removeChild(div);
		}
		
		// Set the content of the iframe
		this.write(div.innerHTML);
		
		// Enabled editing
		setTimeout("Editor.enable()", 1000);
	},
	execute : function(command){
		this.document().execCommand(command, false, false);
	},
	newLink : function(){
		with (Editor.document()){
			execCommand("CreateLink", false, '?__temp');
			
			list = getElementsByTagName("a");
			
			for (i=0;a=list[i];i++){
				if (a.href.match(/__temp/)){
					return a;
				}
			}
		}
	},
	buttons : {
		'Link' : {
			element : 'A',
			callback : function(){
				a = Editor.newLink();

				url = a.innerHTML.replace(/<[^>]+>/g,"");
				url = url.replace(/&.+?;/g,"");
				url = url.replace(/\s+$/,"");
				url = url.replace(/^\s+/,"");
				url = url.replace(/\W/g,"-");
				
				a.href="/page/show/" + url.toLowerCase();
			}
		},
		'Weblink' : {
			element : null,
			callback : function(){
				if (url=prompt("Enter URL..                                      ")){
					a = Editor.newLink();
					a.href = url;
					a.className = "web";
				}
			}
		},
		'List' : {
			element : 'OL',
			callback : function(){
				Editor.document().execCommand("insertorderedlist", false, false);
			}
		},
		'Heading' : {
			element : 'H2',
			callback : function(){
				if (Editor.activeElement().nodeName=='H2'){
					Editor.document().execCommand("formatblock", false, '<p>');
				}else{
					Editor.document().execCommand("formatblock", false, '<h2>');
				}
			}
		},
/*		'Bold' : {
			element : 'B|STRONG',
			callback : function(){
				Editor.document().execCommand("bold", false, false);
			}
		},*/
/*		'Upload attachment' : {
			element : null,
			callback : function(){
				Editor.insertFile();
			}
		},*/
		'Cancel' : {
			element : null,
			callback : function(){
				window.location.reload();
			}
		}
	},
	insertFragment : function(html){
		this.document().body.innerHTML += html;
	},
	cancelInsertFile : function(){
		this.iframe.style.display = '';
		$('upload').innerHTML = '';
		this.enable();
	},
	insertFile : function(){
		this.iframe.style.display = 'none';

		id = $('page-id').value;
		new Ajax.Updater('upload', '/page/insertfile/' + id);
	},
	updateToolbar : function(){
		try{
			node = this.activeElement();
			
			// Deselect all buttons
			for (e in this.buttons){
				if (this.buttons[e].button){
					this.buttons[e].button.className = "";
				}
			}
			
			// Select appropriate buttons
			while (node){
				for (e in this.buttons){
					with (this.buttons[e]){
						if ((button) && (node.nodeName.match(new RegExp('^(' + element + ')$')))){
							button.className = "selected";
						}
					}
				}
				
				node = node.parentNode;
			}
		}catch(e){
			// ie goes here sometimes
		}
	},
	createToolbar : function(){
		with (this.toolbar = document.createElement("div")){
			className = "toolbar";
			
			for (e in this.buttons){
				if (e!='extend'){
					with (button = document.createElement("input")){
						type='button';
						value = e;
						if (value.match(/cancel/i)){
							style.cssText = "position: absolute; right: 1em;";
						}
					}

					button.onclick = this.buttons[e].callback;

					appendChild(this.buttons[e].button = button);
				}
			}
		}
	},
	tidy : function(){
		var list = this.document().getElementsByTagName("*");
		
		with (this.document().body){
			innerHTML = innerHTML.replace(/(&nbsp;)+/g, ' ');
		}

		for (x=0;obj=list[x];x++){
			for (y=0;attribute=obj.attributes[y];y++){
				obj.removeAttribute(attribute.nodeName);
			}
		}
	},
	focus : function(e){
		this.iframe.contentWindow.focus();
		
		if (e){
		        e.cancelBubble = true;
		        e.returnValue = false;
		        
		        if (e.stopPropogation){
		        	e.stopPropogation();
		        }
		        if (e.preventDefault){
		        	e.preventDefault();
		        }
		}

		return false;
	},
	onkeydown : function(e){
		if (e.ctrlKey){
			if (e.charCode==98){
				Editor.buttons['Bold'].callback();
				return Editor.focus(e);
			}

			if (e.charCode==108){
				Editor.buttons['Link'].callback();
				return Editor.focus(e);
			}

			if (e.charCode==104){
				Editor.buttons['Heading'].callback();
				return Editor.focus(e);
			}

			if (e.charCode==105){
				Editor.buttons['List'].callback();
				return Editor.focus(e);
			}
			
			if (e.keyCode==13){
				Editor.save();
			}
		}
	},
	enable : function(){
		this.document().onkeydown = this.onkeydown;

		this.document().designMode="on";

		try{
			this.document().execCommand("useCSS", false, true);
			this.document().addEventListener("keypress", this.onkeydown, true);
		}catch(e){
			// I am IE - hear me roar!
		}
		
		Editor.focus();

		new PeriodicalExecuter(function(){
			Editor.updateToolbar();
		}, 0.1);
	},
	write : function(html){
		with (this.document()){
			open();
			write("<html><head><style type='text/css'>@import url(/stylesheets/content.css);</style></head><body id='content'><p>" + html + "</p></body></html>");
			close();
		}
	}
};

var myrules = {
	'#right img' : function(e){
		e.onclick = function(){
			p = this.parentNode;
			Editor.insertFragment('<p class="' + p.className + '">' + p.innerHTML.replace(/_t/g, '_m') + '</p>');
		}
	},
	'#edit' : function(e){
		Editor.initialize($('page'));
	},
	'#content' : function(e){
	},
	'#wiki_name' : function(e){
		// Watch for changes
		new Form.Element.Observer(
			'wiki_name', 1, function(element, value){
				new Ajax.Updater('domain-name', '/wiki/check_availability', {
					parameters:'name='+escape(value), 
					evalScripts:true, 
					asynchronous:true
				})
			}
		);
	},
	'#invite-author' : function(e){
		e.onclick = function(){
			this.parentNode.insertBefore(this, input);
			this.parentNode.removeChild(this);
		}
	}
};

/*
   Behaviour v1.0 by Ben Nolan, June 2005. Based largely on the work
   of Simon Willison (see comments by Simon below).

   Description:
   	
   	Uses css selectors to apply javascript behaviours to enable
   	unobtrusive javascript in html documents.
   	
   Usage:   
   
	var myrules = {
		'b.someclass' : function(element){
			element.onclick = function(){
				alert(this.innerHTML);
			}
		},
		'#someid u' : function(element){
			element.onmouseover = function(){
				this.innerHTML = "BLAH!";
			}
		}
	);
	
	Behaviour.register(myrules);
	
	// Call Behaviour.apply() to re-apply the rules (if you
	// update the dom, etc).

   License:
   
   	My stuff is BSD licensed. Not sure about Simon's.
   	
   More information:
   	
   	http://ripcord.co.nz/behaviour/
   
*/   

var Behaviour = {
	list : new Array,
	
	register : function(sheet){
		Behaviour.list.push(sheet);
	},
	
	start : function(){
		Behaviour.addLoadEvent(function(){
			Behaviour.apply();
		});
	},
	
	apply : function(){
		for (h=0;sheet=Behaviour.list[h];h++){
			for (selector in sheet){
				list = document.getElementsBySelector(selector);
				
				if (!list){
					continue;
				}

				for (i=0;element=list[i];i++){
					sheet[selector](element);
				}
			}
		}
	},
	
	addLoadEvent : function(func){
		var oldonload = window.onload;
		
		if (typeof window.onload != 'function') {
			window.onload = func;
		} else {
			window.onload = function() {
				oldonload();
				func();
			}
		}
	}
}

Behaviour.start();
Behaviour.register(myrules);

/*
   The following code is Copyright (C) Simon Willison 2004.

   document.getElementsBySelector(selector)
   - returns an array of element objects from the current document
     matching the CSS selector. Selectors can contain element names, 
     class names and ids and can be nested. For example:
     
       elements = document.getElementsBySelect('div#main p a.external')
     
     Will return an array of all 'a' elements with 'external' in their 
     class attribute that are contained inside 'p' elements that are 
     contained inside the 'div' element which has id="main"

   New in version 0.4: Support for CSS2 and CSS3 attribute selectors:
   See http://www.w3.org/TR/css3-selectors/#attribute-selectors

   Version 0.4 - Simon Willison, March 25th 2003
   -- Works in Phoenix 0.5, Mozilla 1.3, Opera 7, Internet Explorer 6, Internet Explorer 5 on Windows
   -- Opera 7 fails 
*/

function getAllChildren(e) {
  // Returns all children of element. Workaround required for IE5/Windows. Ugh.
  return e.all ? e.all : e.getElementsByTagName('*');
}

document.getElementsBySelector = function(selector) {
  // Attempt to fail gracefully in lesser browsers
  if (!document.getElementsByTagName) {
    return new Array();
  }
  // Split selector in to tokens
  var tokens = selector.split(' ');
  var currentContext = new Array(document);
  for (var i = 0; i < tokens.length; i++) {
    token = tokens[i].replace(/^\s+/,'').replace(/\s+$/,'');;
    if (token.indexOf('#') > -1) {
      // Token is an ID selector
      var bits = token.split('#');
      var tagName = bits[0];
      var id = bits[1];
      var element = document.getElementById(id);
      if (tagName && element.nodeName.toLowerCase() != tagName) {
        // tag with that ID not found, return false
        return new Array();
      }
      // Set currentContext to contain just this element
      currentContext = new Array(element);
      continue; // Skip to next token
    }
    if (token.indexOf('.') > -1) {
      // Token contains a class selector
      var bits = token.split('.');
      var tagName = bits[0];
      var className = bits[1];
      if (!tagName) {
        tagName = '*';
      }
      // Get elements matching tag, filter them for class selector
      var found = new Array;
      var foundCount = 0;
      for (var h = 0; h < currentContext.length; h++) {
        var elements;
        if (tagName == '*') {
            elements = getAllChildren(currentContext[h]);
        } else {
            elements = currentContext[h].getElementsByTagName(tagName);
        }
        for (var j = 0; j < elements.length; j++) {
          found[foundCount++] = elements[j];
        }
      }
      currentContext = new Array;
      var currentContextIndex = 0;
      for (var k = 0; k < found.length; k++) {
        if (found[k].className && found[k].className.match(new RegExp('\\b'+className+'\\b'))) {
          currentContext[currentContextIndex++] = found[k];
        }
      }
      continue; // Skip to next token
    }
    // Code to deal with attribute selectors
    if (token.match(/^(\w*)\[(\w+)([=~\|\^\$\*]?)=?"?([^\]"]*)"?\]$/)) {
      var tagName = RegExp.$1;
      var attrName = RegExp.$2;
      var attrOperator = RegExp.$3;
      var attrValue = RegExp.$4;
      if (!tagName) {
        tagName = '*';
      }
      // Grab all of the tagName elements within current context
      var found = new Array;
      var foundCount = 0;
      for (var h = 0; h < currentContext.length; h++) {
        var elements;
        if (tagName == '*') {
            elements = getAllChildren(currentContext[h]);
        } else {
            elements = currentContext[h].getElementsByTagName(tagName);
        }
        for (var j = 0; j < elements.length; j++) {
          found[foundCount++] = elements[j];
        }
      }
      currentContext = new Array;
      var currentContextIndex = 0;
      var checkFunction; // This function will be used to filter the elements
      switch (attrOperator) {
        case '=': // Equality
          checkFunction = function(e) { return (e.getAttribute(attrName) == attrValue); };
          break;
        case '~': // Match one of space seperated words 
          checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('\\b'+attrValue+'\\b'))); };
          break;
        case '|': // Match start with value followed by optional hyphen
          checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('^'+attrValue+'-?'))); };
          break;
        case '^': // Match starts with value
          checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) == 0); };
          break;
        case '$': // Match ends with value - fails with "Warning" in Opera 7
          checkFunction = function(e) { return (e.getAttribute(attrName).lastIndexOf(attrValue) == e.getAttribute(attrName).length - attrValue.length); };
          break;
        case '*': // Match ends with value
          checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) > -1); };
          break;
        default :
          // Just test for existence of attribute
          checkFunction = function(e) { return e.getAttribute(attrName); };
      }
      currentContext = new Array;
      var currentContextIndex = 0;
      for (var k = 0; k < found.length; k++) {
        if (checkFunction(found[k])) {
          currentContext[currentContextIndex++] = found[k];
        }
      }
      // alert('Attribute Selector: '+tagName+' '+attrName+' '+attrOperator+' '+attrValue);
      continue; // Skip to next token
    }
    
    if (!currentContext[0]){
    	return;
    }
    
    // If we get here, token is JUST an element (not a class or ID selector)
    tagName = token;
    var found = new Array;
    var foundCount = 0;
    for (var h = 0; h < currentContext.length; h++) {
      var elements = currentContext[h].getElementsByTagName(tagName);
      for (var j = 0; j < elements.length; j++) {
        found[foundCount++] = elements[j];
      }
    }
    currentContext = found;
  }
  return currentContext;
}

/* That revolting regular expression explained 
/^(\w+)\[(\w+)([=~\|\^\$\*]?)=?"?([^\]"]*)"?\]$/
  \---/  \---/\-------------/    \-------/
    |      |         |               |
    |      |         |           The value
    |      |    ~,|,^,$,* or =
    |   Attribute 
   Tag
*/