/*
 * Lightweight RTE - jQuery Plugin, version 1.2
 * Copyright (c) 2009 Andrey Gayvoronsky - http://www.gayvoronsky.com
 */
jQuery.fn.rte = function(options, editors){
	if (!editors || editors.constructor != Array) 
		editors = new Array();
	
	jQuery(this).each(function(i){
		var id = (this.id) ? this.id : editors.length;
		editors[id] = new lwRTE(this, options ||
		{});
	});
	
	return editors;
}

var lwRTE_resizer = function(textarea){
	this.drag = false;
	this.rte_zone = jQuery(textarea).parents('.rte-zone');
}

lwRTE_resizer.mousedown = function(resizer, e){
	resizer.drag = true;
	resizer.event = (typeof(e) == "undefined") ? window.event : e;
	resizer.rte_obj = jQuery(".rte-resizer", resizer.rte_zone).prev().eq(0);
	jQuery('body', document).css('cursor', 'se-resize');
	return false;
}

lwRTE_resizer.mouseup = function(resizer, e){
	resizer.drag = false;
	jQuery('body', document).css('cursor', 'auto');
	return false;
}

lwRTE_resizer.mousemove = function(resizer, e){
	if (resizer.drag) {
		e = (typeof(e) == "undefined") ? window.event : e;
		var w = Math.max(1, resizer.rte_zone.width() + e.screenX - resizer.event.screenX);
		var h = Math.max(1, resizer.rte_obj.height() + e.screenY - resizer.event.screenY);
		resizer.rte_zone.width(w);
		resizer.rte_obj.height(h);
		resizer.event = e;
	}
	return false;
}

var lwRTE = function(textarea, options){
	this.css = [];
	this.css_class = options.frame_class || '';
	this.base_url = options.base_url || '';
	this.width = options.width || jQuery(textarea).width() || '100%';
	this.height = options.height || jQuery(textarea).height() || 350;
	this.iframe = null;
	this.iframe_doc = null;
	this.textarea = null;
	this.event = null;
	this.range = null;
	this.toolbars = {
		rte: '',
		html: ''
	};
	this.controls = {
		rte: {
			disable: {
				hint: 'Source editor'
			}
		},
		html: {
			enable: {
				hint: 'Visual editor'
			}
		}
	};
	
	jQuery.extend(this.controls.rte, options.controls_rte ||
	{});
	jQuery.extend(this.controls.html, options.controls_html ||
	{});
	jQuery.extend(this.css, options.css ||
	{});
	
	if (document.designMode || document.contentEditable) {
		jQuery(textarea).wrap(jQuery('<div></div>').addClass('rte-zone').width(this.width));
		/*
		jQuery('<div class="rte-resizer"><a href="#"></a></div>').insertAfter(textarea);
		
		var resizer = new lwRTE_resizer(textarea);
		
		jQuery(".rte-resizer a", jQuery(textarea).parents('.rte-zone')).mousedown(function(e){
			jQuery(document).mousemove(function(e){
				return lwRTE_resizer.mousemove(resizer, e);
			});
			
			jQuery(document).mouseup(function(e){
				return lwRTE_resizer.mouseup(resizer, e)
			});
			
			return lwRTE_resizer.mousedown(resizer, e);
		});
		*/
		this.textarea = textarea;
		this.enable_design_mode();
	}
}

lwRTE.prototype.editor_cmd = function(command, args){
	this.iframe.contentWindow.focus();
	try {
		this.iframe_doc.execCommand(command, false, args);
	} 
	catch (e) {
	}
	this.iframe.contentWindow.focus();
}

lwRTE.prototype.get_toolbar = function(){
	var editor = (this.iframe) ? jQuery(this.iframe) : jQuery(this.textarea);
	return (editor.prev().hasClass('rte-toolbar')) ? editor.prev() : null;
}

lwRTE.prototype.activate_toolbar = function(editor, tb){
	var old_tb = this.get_toolbar();
	
	if (old_tb) 
		old_tb.remove();
	
	jQuery(editor).before(jQuery(tb).clone(true));
}

lwRTE.prototype.enable_design_mode = function(){
	var self = this;
	
	// need to be created this way
	self.iframe = document.createElement("iframe");
	self.iframe.frameBorder = 0;
	self.iframe.frameMargin = 0;
	self.iframe.framePadding = 0;
	self.iframe.width = '100%';
	self.iframe.height = self.height || '100%';
	self.iframe.src = "javascript:void(0);";
	
	if (jQuery(self.textarea).attr('class')) 
		self.iframe.className = jQuery(self.textarea).attr('class');
	
	if (jQuery(self.textarea).attr('id')) 
		self.iframe.id = jQuery(self.textarea).attr('id');
	
	if (jQuery(self.textarea).attr('name')) 
		self.iframe.title = jQuery(self.textarea).attr('name');
	
	var content = jQuery(self.textarea).val();
	
	jQuery(self.textarea).hide().after(self.iframe).remove();
	self.textarea = null;
	
	var css = '';
	
	for (var i in self.css) 
		css += "<link type='text/css' rel='stylesheet' href='" + self.css[i] + "' />";
	
	var base = (self.base_url) ? "<base href='" + self.base_url + "' />" : '';
	var style = (self.css_class) ? "class='" + self.css_class + "'" : '';
	
	// Mozilla need this to display caret
	/*if(jQuery.trim(content) == '')
	 content	= '<br>';*/
	var doc = "<html><head>" + base + css + "</head><body " + style + " style='padding:5px'>" + content + "</body></html>";
	
	self.iframe_doc = self.iframe.contentWindow.document;
	
	try {
		self.iframe_doc.designMode = 'on';
	} 
	catch (e) {
		// Will fail on Gecko if the editor is placed in an hidden container element
		// The design mode will be set ones the editor is focused
		jQuery(self.iframe_doc).focus(function(){
			self.iframe_doc.designMode();
		});
	}
	
	self.iframe_doc.open();
	self.iframe_doc.write(doc);
	self.iframe_doc.close();
	
	if (!self.toolbars.rte) 
		self.toolbars.rte = self.create_toolbar(self.controls.rte);
	
	self.activate_toolbar(self.iframe, self.toolbars.rte);
	
	jQuery(self.iframe).parents('form').submit(function(){
		self.disable_design_mode(true);
	});
	
	jQuery(self.iframe_doc).mouseup(function(event){
		if (self.iframe_doc.selection) 
			self.range = self.iframe_doc.selection.createRange(); //store to restore later(IE fix)
		self.set_selected_controls((event.target) ? event.target : event.srcElement, self.controls.rte);
	});
	
	jQuery(self.iframe_doc).blur(function(event){
		if (self.iframe_doc.selection) 
			self.range = self.iframe_doc.selection.createRange(); // same fix for IE as above
	});
	
	jQuery(self.iframe_doc).keyup(function(event){
		self.set_selected_controls(self.get_selected_element(), self.controls.rte);
	});
	
	// Mozilla CSS styling off
	if (!jQuery.browser.msie) 
		self.editor_cmd('styleWithCSS', false);
}

lwRTE.prototype.disable_design_mode = function(submit){
	var self = this;
	
	self.textarea = (submit) ? jQuery('<input type="hidden" />').get(0) : jQuery('<textarea></textarea>').width('100%').height(self.height).get(0);
	
	if (self.iframe.className) 
		self.textarea.className = self.iframe.className;
	
	if (self.iframe.id) 
		self.textarea.id = self.iframe.id;
	
	if (self.iframe.title) 
		self.textarea.name = self.iframe.title;
	
	jQuery(self.textarea).val(jQuery('body', self.iframe_doc).html());
	jQuery(self.iframe).before(self.textarea);
	
	if (!self.toolbars.html) 
		self.toolbars.html = self.create_toolbar(self.controls.html);
	
	if (submit != true) {
		jQuery(self.iframe_doc).remove(); //fix 'permission denied' bug in IE7 (jquery cache)
		jQuery(self.iframe).remove();
		self.iframe = self.iframe_doc = null;
		self.activate_toolbar(self.textarea, self.toolbars.html);
	}
}

lwRTE.prototype.toolbar_click = function(obj, control){
	var fn = control.exec;
	var args = control.args || [];
	var is_select = (obj.tagName.toUpperCase() == 'SELECT');
	
	jQuery('.rte-panel', this.get_toolbar()).remove();
	
	if (fn) {
		if (is_select) 
			args.push(obj);
		
		try {
			fn.apply(this, args);
		} 
		catch (e) {
		
		}
	}
	else 
		if (this.iframe && control.command) {
			if (is_select) {
				args = obj.options[obj.selectedIndex].value;
				
				if (args.length <= 0) 
					return;
			}
			
			this.editor_cmd(control.command, args);
		}
}

lwRTE.prototype.create_toolbar = function(controls){
	var self = this;
	var tb = jQuery("<div></div>").addClass('rte-toolbar').width('100%').append(jQuery("<ul></ul>")).append(jQuery("<div></div>").addClass('clear'));
	var obj, li;
	
	for (var key in controls) {
		if (controls[key].separator) {
			li = jQuery("<li></li>").addClass('separator');
		}
		else {
			if (controls[key].init) {
				try {
					controls[key].init.apply(controls[key], [this]);
				} 
				catch (e) {
				}
			}
			
			if (controls[key].select) {
				obj = jQuery(controls[key].select).change(function(e){
					self.event = e;
					self.toolbar_click(this, controls[this.className]);
					return false;
				});
			}
			else {
				obj = jQuery("<a href='#'></a>").attr('title', (controls[key].hint) ? controls[key].hint : key).attr('rel', key).click(function(e){
					self.event = e;
					self.toolbar_click(this, controls[this.rel]);
					return false;
				})
			}
			
			li = jQuery("<li></li>").append(obj.addClass(key));
		}
		
		jQuery("ul", tb).append(li);
	}
	
	jQuery('.enable', tb).click(function(){
		self.enable_design_mode();
		return false;
	});
	
	jQuery('.disable', tb).click(function(){
		self.disable_design_mode();
		return false;
	});
	
	return tb.get(0);
}

lwRTE.prototype.create_panel = function(title, width){
	var self = this;
	var tb = self.get_toolbar();
	
	if (!tb) 
		return false;
	
	jQuery('.rte-panel', tb).remove();
	var drag, event;
	var left = self.event.pageX;
	var top = self.event.pageY;
	
	var panel = jQuery('<div></div>').hide().addClass('rte-panel').css({
		left: left,
		top: top
	});
	jQuery('<div></div>').addClass('rte-panel-title').html(title).append(jQuery("<a class='close' href='#'>X</a>").click(function(){
		panel.remove();
		return false;
	})).mousedown(function(){
		drag = true;
		return false;
	}).mouseup(function(){
		drag = false;
		return false;
	}).mousemove(function(e){
		if (drag && event) {
			left -= event.pageX - e.pageX;
			top -= event.pageY - e.pageY;
			panel.css({
				left: left,
				top: top
			});
		}
		
		event = e;
		return false;
	}).appendTo(panel);
	
	if (width) 
		panel.width(width);
	
	tb.append(panel);
	return panel;
}

/**
 * Want to use the built-in jQuery Dialog
 * @author Erik Stiklestad
 */
lwRTE.prototype.create_dialog = function(title, content, width, height, save, close){
	var self = this;
	var tb = self.get_toolbar();
	if (!tb) 
		return false;
	jQuery('.user_editor_insert_image', tb).remove();
	var dialog = jQuery('<div id="user_editor_insert_image">'+content+'</div>');
	
	var btns = {};
	if(save != null) {
		btns['OK'] = save;
	}
	if(close != null) {
		btns['Close'] = close;
	}
	
	dialog.dialog({
		title: title,
		width: width,
		autoResize:true,
		position:'top',
		resizable: true,
		zIndex: 1000,
		buttons: btns,
		close: function() {
			$j("#user_editor_insert_image").remove(); // dialog("close") would not work
		}
	});
	return jQuery('.rte-dialog:last');
}

lwRTE.prototype.get_content = function(){
	return (this.iframe) ? jQuery('body', this.iframe_doc).html() : jQuery(this.textarea).val();
}

lwRTE.prototype.set_content = function(content){
	(this.iframe) ? jQuery('body', this.iframe_doc).html(content) : jQuery(this.textarea).val(content);
}

lwRTE.prototype.set_selected_controls = function(node, controls){
	var toolbar = this.get_toolbar();
	
	if (!toolbar) 
		return false;
	
	var key, i_node, obj, control, tag, i, value;
	
	try {
		for (key in controls) {
			control = controls[key];
			obj = jQuery('.' + key, toolbar);
			
			obj.removeClass('active');
			
			if (!control.tags) 
				continue;
			
			i_node = node;
			do {
				if (i_node.nodeType != 1) 
					continue;
				
				tag = i_node.nodeName.toLowerCase();
				if (jQuery.inArray(tag, control.tags) < 0) 
					continue;
				
				if (control.select) {
					obj = obj.get(0);
					if (obj.tagName.toUpperCase() == 'SELECT') {
						obj.selectedIndex = 0;
						
						for (i = 0; i < obj.options.length; i++) {
							value = obj.options[i].value;
							if (value && ((control.tag_cmp && control.tag_cmp(i_node, value)) || tag == value)) {
								obj.selectedIndex = i;
								break;
							}
						}
					}
				}
				else 
					obj.addClass('active');
			}
			while (i_node = i_node.parentNode)
		}
	} 
	catch (e) {
	}
	
	return true;
}

lwRTE.prototype.get_selected_element = function(){
	var node, selection, range;
	var iframe_win = this.iframe.contentWindow;
	
	if (iframe_win.getSelection) {
		try {
			selection = iframe_win.getSelection();
			range = selection.getRangeAt(0);
			node = range.commonAncestorContainer;
		} 
		catch (e) {
			return false;
		}
	}
	else {
		try {
			selection = iframe_win.document.selection;
			range = selection.createRange();
			node = range.parentElement();
		} 
		catch (e) {
			return false;
		}
	}
	
	return node;
}

lwRTE.prototype.get_selection_range = function(){
	var rng = null;
	var iframe_window = this.iframe.contentWindow;
	this.iframe.focus();
	
	if (iframe_window.getSelection) {
		rng = iframe_window.getSelection().getRangeAt(0);
		if (jQuery.browser.opera) { //v9.63 tested only
			var s = rng.startContainer;
			if (s.nodeType === Node.TEXT_NODE) 
				rng.setStartBefore(s.parentNode);
		}
	}
	else {
		this.range.select(); //Restore selection, if IE lost focus.
		rng = this.iframe_doc.selection.createRange();
	}
	
	return rng;
}

lwRTE.prototype.get_selected_text = function(){
	var iframe_win = this.iframe.contentWindow;
	
	if (iframe_win.getSelection) 
		return iframe_win.getSelection().toString();
	
	this.range.select(); //Restore selection, if IE lost focus.
	return iframe_win.document.selection.createRange().text;
};

lwRTE.prototype.get_selected_html = function(){
	var html = null;
	var iframe_window = this.iframe.contentWindow;
	var rng = this.get_selection_range();
	
	if (rng) {
		if (iframe_window.getSelection) {
			var e = document.createElement('div');
			e.appendChild(rng.cloneContents());
			html = e.innerHTML;
		}
		else {
			html = rng.htmlText;
		}
	}
	
	return html;
};

lwRTE.prototype.selection_replace_with = function(html){
	var rng = this.get_selection_range();
	var iframe_window = this.iframe.contentWindow;
	
	if (!rng) 
		return;
	
	this.editor_cmd('removeFormat'); // we must remove formating or we will get empty format tags!
	if (iframe_window.getSelection) {
		rng.deleteContents();
		rng.insertNode(rng.createContextualFragment(html));
		this.editor_cmd('delete');
	}
	else {
		this.editor_cmd('delete');
		rng.pasteHTML(html);
	}
}