/*
 * WYMeditor : what you see is What You Mean web-based editor
 * Copyright (c) 2005 - 2009 Jean-Francois Hovinne, http://www.wymeditor.org/
 * Dual licensed under the MIT (MIT-license.txt)
 * and GPL (GPL-license.txt) licenses.
 *
 * For further information visit:
 *        http://www.wymeditor.org/
 *
 * File Name:
 *        jquery.wymeditor.explorer.js
 *        MSIE specific class and functions.
 *        See the documentation for more info.
 *
 * File Authors:
 *        Jean-Francois Hovinne (jf.hovinne a-t wymeditor dotorg)
 *        Bermi Ferrer (wymeditor a-t bermi dotorg)
 *        Frédéric Palluel-Lafleur (fpalluel a-t gmail dotcom)
 *        Jonatan Lundin (jonatan.lundin a-t gmail dotcom)
 */WYMeditor.WymClassExplorer = function(wym) {
     this._wym = wym;
     this._class = "className";
     this._newLine = "\r\n";
 };

 WYMeditor.WymClassExplorer.prototype.format_block = function(selected) {

     //'this' should be the wymeditor instance.
     var wym = this;
     var container = selected || wym.selected() || $(wym._iframe).contents().find('body').get(0);
     var name = container.tagName.toLowerCase();

     //fix forbidden main containers
     if($.inArray(name, ['strong', 'b', 'em', 'i', 'sub', 'sup', 'a']) > -1) {
         name = container.parentNode.tagName.toLowerCase();
     }

     if(name == WYMeditor.BODY) {
         wym._selected_image = null;
         $(wym._iframe).contents().find('.selected_by_wym').removeClass('selected_by_wym');
         wym._exec(WYMeditor.FORMAT_BLOCK, "<" + WYMeditor.P + ">");
     }
 };

 WYMeditor.WymClassExplorer.prototype.initIframe = function(iframe) {

     //This function is executed twice, though it is called once!
     //But MSIE needs that, otherwise designMode won't work.
     //Weird.

     this._iframe = iframe;
     this._doc = iframe.contentWindow.document;

     //add css rules from options
     var styles = this._doc.styleSheets[0];
     var aCss = eval(this._options.editorStyles);

     this.addCssRules(this._doc, aCss);

     this._doc.title = this._wym._index;

     //set the text direction
     $('html', this._doc).attr('dir', this._options.direction);

     // Add class to say this is Internet Explorer
     $('html', this._doc).addClass('ie');

     //init html value
     $(this._doc.body).html(this._wym._html);

     //handle events
     var wym = this;

     this._doc.body.onfocus = function()
       {wym._doc.designMode = "on"; wym._doc = iframe.contentWindow.document;};
     this._doc.onbeforedeactivate = function() {wym.saveCaret();};
     this._doc.onkeyup = function() {
       wym.saveCaret();
       wym.keyup();
     };
     this._doc.onclick = function() {wym.saveCaret();};

     this._doc.body.onbeforepaste = function() {
       wym._iframe.contentWindow.event.returnValue = false;
     };

     this._doc.body.onpaste = function() {
       wym._iframe.contentWindow.event.returnValue = false;
       // Trident doesn't need to intercept the paste as it can access the clipboard easily.
       wym.paste(window.clipboardData.getData("Text"));
     };

     //callback can't be executed twice, so we check
     if(this._initialized) {

       //pre-bind functions
       if($.isFunction(this._options.preBind)) this._options.preBind(this);

       //bind external events
       this._wym.bindEvents();

       //post-init functions
       if($.isFunction(this._options.postInit)) this._options.postInit(this);

       //add event listeners to doc elements, e.g. images
       this.listen();
     }

     this._initialized = true;

     //init designMode
     this._doc.designMode="on";
     try{
         // (bermi's note) noticed when running unit tests on IE6
         // Is this really needed, it trigger an unexisting property on IE6
         this._doc = iframe.contentWindow.document;
     }catch(e){}
 };

 WYMeditor.WymClassExplorer.prototype._exec = function(cmd,param) {

   var wym = this;

   switch(cmd) {
     case WYMeditor.INDENT: case WYMeditor.OUTDENT:
       var container = wym.findUp(wym.container(), WYMeditor.LI);
       if(container) {
         var ancestor = container.parentNode.parentNode;
         if(container.parentNode.childNodes.length > 1 || $.inArray(ancestor.tagName.toLowerCase(), [WYMeditor.OL, WYMeditor.UL]) > -1) {
           wym._doc.execCommand(cmd);
         }
       }
       break;
     default:
       if(param) {
         wym._doc.execCommand(cmd,false,param);
       }
       else {
         wym._doc.execCommand(cmd);
       }
       break;
   }

 };

 WYMeditor.WymClassExplorer.prototype.selected = function() {
     var caretPos = this._iframe.contentWindow.document.caretPos;
     if(caretPos != null && caretPos.parentElement != undefined) {
         return(caretPos.parentElement());
     }
 };

 WYMeditor.WymClassExplorer.prototype.saveCaret = function() {
     this._doc.caretPos = this._doc.selection.createRange();
 };

 WYMeditor.WymClassExplorer.prototype.addCssRule = function(styles, oCss) {
     styles.addRule(oCss.name, oCss.css);
 };

 WYMeditor.WymClassExplorer.prototype.insert = function(html) {
     // Get the current selection
     var range = this._doc.selection.createRange();

     // Check if the current selection is inside the editor
     if ( $(range.parentElement()).parents( this._options.iframeBodySelector ).is('*') ) {
         try {
             // Overwrite selection with provided html
             range.pasteHTML(html);
         } catch (e) { }
     } else {
         // Fall back to the internal paste function if there's no selection
         this.paste(html);
     }
 };

 WYMeditor.WymClassExplorer.prototype.wrap = function(left, right) {

     // Get the current selection
     var range = this._doc.selection.createRange();

     // Check if the current selection is inside the editor
     if ( $(range.parentElement()).parents( this._options.iframeBodySelector ).is('*') ) {
         try {
             // Overwrite selection with provided html
             range.pasteHTML(left + range.text + right);
         } catch (e) { }
     }
 };

 WYMeditor.WymClassExplorer.prototype.unwrap = function() {

     // Get the current selection
     var range = this._doc.selection.createRange();

     // Check if the current selection is inside the editor
     if ( $(range.parentElement()).parents( this._options.iframeBodySelector ).is('*') ) {
         try {
             // Unwrap selection
             var text = range.text;
             this._exec( 'Cut' );
             range.pasteHTML( text );
         } catch (e) { }
     }
 };

 //keyup handler
 WYMeditor.WymClassExplorer.prototype.keyup = function(e) {

   (wym = this)._selected_image = null;
   $(wym._iframe).contents().find('.selected_by_wym').removeClass('selected_by_wym');
   wym.format_block();
 };

 WYMeditor.WymClassExplorer.prototype.setFocusToNode = function(node, toStart) {
   (wym = this)._iframe.contentWindow.focus();
   var range = wym._doc.selection.createRange();
   toStart = toStart ? true : false;

   range.moveToElementText(node);
   range.collapse(toStart);
   range.select();
   node.focus();
 };