// ----------------------------------------------------------------------------
// j(Universal?)TagEditor, JQuery plugin
// v 1.1.00
// ----------------------------------------------------------------------------
// Copyright (C) 2007 Jay Salvat
// http://www.jaysalvat.com/jquery/jtageditor/
// ----------------------------------------------------------------------------
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// ----------------------------------------------------------------------------
(function($) {
	$.fn.jTagEditor = function(settings) {	
		var field 		= this;
		options =  {	editorClassName:		"jTagEditor-editor",
						toolBarClassName:		"jTagEditor-toolBar",
						buttonClassName:		"jTagEditor-button",
						resizeHandleClassName:	"jTagEditor-resizeHandle",
						previewId:				"jTagEditor-previewWindow",
						previewClassName:		"jTagEditor-preview",
						previewCss:				"",
						previewParser:			"",
						previewVarName:			"data",
						insertOnEnter:			{openTag:"", 			closeTag:"",		callBack:"",		preventDefault:true},
						insertOnShiftEnter:		{openTag:"<br />\n", 	closeTag:"",		callBack:"", 		preventDefault:false},
						insertOnCtrlEnter:		{openTag:"<p>", 		closeTag:"</p>",	callBack:"", 		preventDefault:false},
						insertOnTab:			{openTag:"     ", 		closeTag:"",		callBack:"", 		preventDefault:false},
						tagMask:				"<(.*?)>",
						tagSet:					"html/html-tags.js"
					};
		var options = $.extend(options, settings);

		var openPos = 0; 
		var closePos = 0;
		var scrollPos = 0;
		var openTags = new Array();
		var keyCtrl = false;
		var keyShift = false;
		var keyAlt = false;
		
		return this.each(function()	{							
			var field 		= this;
			var $$			= $(field);
			var oId 		= $$.attr("id") || "";
			var oClassName	= $$.attr("class") || "";
			var oTitle		= $$.attr("title") || "";
			var oName		= $$.attr("name") || "";
			
			// wrap textfield in a container div
			$(field).wrap("<div id=\"" + oId + "\" title=\"" + oTitle + "\" class=\"" + oClassName + "\"></div>");

			// add the toolbar et statusbar
			var toolbar = $("<div class=\"" + options.toolBarClassName + "\"><ul></ul></div>").insertBefore(field);
			
			// copy attributes
			$(field).attr("id", "").attr("class", "").attr("class", options.editorClassName);

			// load tags from file if file is set
			if (typeof(options.tagSet) == "string")	{
				$.ajaxSetup( {async:false} ); 
				$.getJSON(options.tagSet, function(json)	{ 
					options.tagSet = json;  
				});
			}
			
			// fill the toolbar with tag buttons
			$(options.tagSet).each(function(i)	{
				var button = this;
				$("<li class='" + button.className + " " + options.buttonClassName+(i+1) + "'><a href=\"\" accesskey=\"" + button.accesskey + "\" " + button.onclick + " title=\"" + button.label + "\">" + button.label + "</a></li>")
			//	$("<li class='" + button.className + " " + options.buttonClassName+(i+1) + "'><a href=\"\" accesskey=\"" + button.accesskey + "\" title=\"" + button.label + "\">" + button.label + "</a></li>")

				.click(function()	{ 
							tag(button); 
							return false;	
						})
				.appendTo(toolbar);
			});
									
			// listen key events
			$(field).bind("keydown", keyUpDown).bind("keyup", keyUpDown).bind("keypress", keyPress);						  

			// create attribute ursprüngliche funktion zum ersetzen des @@ bei den links als auch bei den Bildern durch die eingabe in das textfeld, man muss es nur schaffen, die eingabe dann von rexlink und von rexmedia pool ersetzen zu lassen
			function attribute(string)	{
				if (string)	{
					return string.replace(/@(.*?)@/g, function (a) { return prompt(a.replace(/@/g, ""), "") });	
				} else {
					return "";
				}
			}

			function tag(button)	{	
				get();
				// if it's a function to fire
				if ($.isFunction(eval(button.callBack)))	{
					eval(button.callBack).call();
				// if it's tag to apply
				} else {
					openTag = attribute(button.openTag);
					closeTag = attribute(button.closeTag);
					if (selection != "")	{
						wrap(openTag, closeTag);	
					} else {
						if (!tagIsOpen(closeTag))	{
							if (closeTag)	{
								openTags.push(closeTag);
							}
							wrap(openTag, "");
						} else {
							openTags.pop() ;
							wrap("", closeTag);
						}	
					}
				}
			}

			// add tag
			function wrap(openTag, closeTag)	{
				string = openTag + selection + closeTag;
				// if Ctrl, Alt or Shift key pressed
				if (keyCtrl == true && keyShift == true)	{
					lines = selection.replace(new RegExp("\r?\n", "g"), "~§~"); // ie hack
					lines = lines.split("~§~");
					n = lines.length;
					for (i = n - 1; i >= 0; i--) {
						lines[i] = (lines[i] != "") ? openTag + lines[i] + closeTag : "";
					}
					string = lines.join("\r\n");
					start = openPos;
					end = openPos + string.length - n + 1;				
				} else if (keyCtrl == true)	{
					start = openPos + openTag.length;			
					end = openPos + openTag.length + selection.length;
				} else if (keyShift == true)	{
					start = openPos;
					end = openPos + string.length;
				} else {
					start = openPos + openTag.length + selection.length + closeTag.length;	
					end = start;
				}
				// replace selection by the new string
				if (document.selection) {					
					newSelection = document.selection.createRange();
					newSelection.text = string;
				} else if (openPos || openPos == "0") {
					field.value = field.value.substring(0, openPos) + string + field.value.substring(closePos, field.value.length);
				} else {
					field.value += string;
				}
				set(start, end);
			}
			
			// set a selection
			function set(start, end)	{		
				if (field.createTextRange){
					range = field.createTextRange();
					range.collapse(true);
					range.moveStart("character", start);
					range.moveEnd("character", end - start);
					range.select();
				} else if (field.setSelectionRange ){
					field.setSelectionRange(start, end);
				}
				field.scrollTop = scrollPos;
				field.focus();	
			}
			
			// get the selection
			function get()	{
				field.focus();
				scrollPos = field.scrollTop;
				if (document.selection) {		
					selection = document.selection.createRange().text;				
					if ($.browser.msie) { // ie
						var range = document.selection.createRange();
						var rangeCopy = range.duplicate();
						rangeCopy.moveToElementText(field);
						openPos = -1;
						while(rangeCopy.inRange(range)) { // fix most of the ie bugs with linefeeds... but not all :'(
							rangeCopy.moveStart("character");
							openPos ++;
						}					
					} else { // opera
						openPos = field.selectionStart;
						closePos =  field.selectionEnd;
					}
				} else if (field.selectionStart || field.selectionStart == "0") { // gecko
					openPos = field.selectionStart;
					closePos = field.selectionEnd;
					selection = field.value.substring(openPos, closePos);
				} else {
					selection = "";
				}
				return selection;
			}

			// clear all tags
			function cleanAll()	{
				get();
				selection = selection.replace(new RegExp(options.tagMask, "g"), "");
				wrap("", "");
			}
		
			// close all open tags
			function closeAll() {
				var tagsToClose = "";
				n = openTags.length;
				for (i = n - 1; i >= 0; i--) {
					tagsToClose += openTags[i];
					openTags.pop();
				}
				get();
				wrap("", tagsToClose);
				field.focus();
			}
					
			// open preview window
			function preview()	{
				var html;
				if (options.previewParser != "")	{
					$.ajax({ 
						type: "POST", 
						async: false,
						url: options.previewParser, 
						data: options.previewVarName + "=" + $(field).val(), 
						success: function(data) { 
							html = data; 
						}
					});
				} else {
					html = "<html>";
					html+= "<head><title>Preview</title>";
					html+= "<link href=\"" + options.previewCss + "\" rel=\"stylesheet\" type=\"text/css\">";
					html+= "</head>";
					html+= "<body id=\"" + options.previewId + "\" class=\"" + options.previewClassName + "\">" + $(field).val() + "</body>";
					html+= "</html>";
				}
				win = window.open("", "preview", "scrollbars=yes, width=" + $(field).width() + ", height=" + $(field).height());
				win.document.open();
				win.document.write(html);
				win.document.close();
				win.focus();	
			}

			// check if tag is already open
			function tagIsOpen(tag)	{
				var n = openTags.length;
				for (var i = 0; i < n; i++) {
					if (openTags[i] == tag) {
						return true;
					}
				}
				return false;
			}
			
			// set keys pressed
			function keyUpDown(evt)	{ // safari doesn't fire event on shift and control key
				keyCtrl = evt.ctrlKey;
				keyShift = evt.shiftKey;
				keyAlt = evt.altKey;
			}

			function keyPress(evt)	{
				get();
				if (evt.keyCode == 13 || evt.keyCode == 10)	{
					if (keyCtrl == true)	{ 
						keyCtrl = false;
						tag(options.insertOnCtrlEnter);	
						return options.insertOnCtrlEnter.preventDefault;
					} else if (keyShift == true)	{
						keyShift = false;
						tag(options.insertOnShiftEnter);		
						return options.insertOnShiftEnter.preventDefault;
					} else {
						tag(options.insertOnEnter);	
						return options.insertOnEnter.preventDefault;
					}
				}
				if (evt.keyCode == 9)	{
					tag(options.insertOnTab);	
					return options.insertOnTab.preventDefault;
				}	
			}
		});		
	};
})(jQuery);