/*
 * 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.mozilla.js
 *        Gecko specific class and functions.
 *        See the documentation for more info.
 *
 * File Authors:
 *        Jean-Francois Hovinne (jf.hovinne a-t wymeditor dotorg)
 *        Volker Mische (vmx a-t gmx dotde)
 *        Bermi Ferrer (wymeditor a-t bermi dotorg)
 *        Frédéric Palluel-Lafleur (fpalluel a-t gmail dotcom)
 */

WYMeditor.WymClassMozilla = function(wym) {

    this._wym = wym;
    this._class = "class";
    this._newLine = "\n";
};

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

    var wym = this;

    this._iframe = iframe;
    this._doc = iframe.contentDocument;

    //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 error class to body if the containing iframe has an error class
    $('.fieldWithErrors iframe').contents().find('body').addClass('fieldWithErrors');

    //init html value
    this.html(this._wym._html);

    //init designMode
    this.enableDesignMode();

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

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

    //bind editor keydown events
    $(this._doc).bind("keydown", this.keydown);

    //bind editor keyup events
    $(this._doc).bind("keyup", this.keyup);

    //bind editor paste events
    $(this._doc).bind("paste", this.intercept_paste);

    //bind editor focus events (used to reset designmode - Gecko bug)
    $(this._doc).bind("focus", function (){
       // Fix scope
       wym.enableDesignMode.call(wym);
    });

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

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

/* @name html
 * @description Get/Set the html value
 */
WYMeditor.WymClassMozilla.prototype.html = function(html) {

  if(typeof html === 'string') {

    //disable designMode
    try { this._doc.designMode = "off"; } catch(e) { };

    //replace em by i and strong by bold
    //(designMode issue)
    html = html.replace(/<em(\b[^>]*)>/gi, "<i$1>")
      .replace(/<\/em>/gi, "</i>")
      .replace(/<strong(\b[^>]*)>/gi, "<b$1>")
      .replace(/<\/strong>/gi, "</b>");

    //update the html body
    $(this._doc.body).html(html);

    //re-init designMode
    this.enableDesignMode();
  }
  else {
    return($(this._doc.body).html());
  }
};

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

    if(!this.selected()) return(false);

    switch(cmd) {

    case WYMeditor.INDENT: case WYMeditor.OUTDENT:
      var focusNode = this.selected();
      var sel = this._iframe.contentWindow.getSelection();
      var anchorNode = sel.anchorNode;
      if(anchorNode.nodeName == "#text") {
        anchorNode = anchorNode.parentNode;
      }

      focusNode = this.findUp(focusNode, WYMeditor.BLOCKS);
      anchorNode = this.findUp(anchorNode, WYMeditor.BLOCKS);

      if(focusNode && focusNode == anchorNode && focusNode.tagName.toLowerCase() == WYMeditor.LI) {
        var ancestor = focusNode.parentNode.parentNode;

        if(focusNode.parentNode.childNodes.length > 1 || $.inArray(ancestor.tagName.toLowerCase(), [WYMeditor.OL, WYMeditor.UL]) > -1) {
          this._doc.execCommand(cmd,'',null);
        }
      }
    break;

    default:
      if(param) this._doc.execCommand(cmd,'',param);
      else this._doc.execCommand(cmd,'',null);
    }

    //set to P if parent = BODY
    var container = this.selected();
    if(container.tagName.toLowerCase() == WYMeditor.BODY) {
        this._exec(WYMeditor.FORMAT_BLOCK, WYMeditor.P);
    }
};



/* @name selected
 * @description Returns the selected container
 */
WYMeditor.WymClassMozilla.prototype.selected = function(upgrade_text_nodes) {

  if (upgrade_text_nodes == null || upgrade_text_nodes.toString() != "true") { upgrade_text_nodes = false; }
  var sel = this._iframe.contentWindow.getSelection();
  var node = sel.focusNode;
  if(node) {
      if(node.nodeName == "#text"){
        if (upgrade_text_nodes && sel.toString().length > 0) {
          actual_node = null;
          parent_node = sel.focusNode.parentNode;
          if (parent_node != null) {
            for (i=0;i<parent_node.childNodes.length;i++){
              child_node = parent_node.childNodes[i];
              if (child_node.nodeName != "#text" && child_node.innerHTML == sel.toString()){
                actual_node = child_node;
              }
            }
          }

          if (actual_node == null) {
            return this.switchTo(sel, 'span');
          } else {
            return actual_node;
          }
        }
        else {
          return node.parentNode;
        }
      }
      else {
        return(node);
      }
  }
  else {
    return(null);
  }
};

WYMeditor.WymClassMozilla.prototype.addCssRule = function(styles, oCss) {
    styles.insertRule(oCss.name + " {" + oCss.css + "}", styles.cssRules.length);
};


//keydown handler, mainly used for keyboard shortcuts
WYMeditor.WymClassMozilla.prototype.keydown = function(e) {

  //'this' is the doc
  var wym = WYMeditor.INSTANCES[this.title];

  if(e.ctrlKey){
    if(e.keyCode == 66){
      //CTRL+b => STRONG
      wym._exec(WYMeditor.BOLD);
      return false;
    }
    if(e.keyCode == 73){
      //CTRL+i => EMPHASIS
      wym._exec(WYMeditor.ITALIC);
      return false;
    }
  }
  else if(e.keyCode == 13) {
    if(!e.shiftKey){
      //fix PRE bug #73
      container = wym.selected();
      if(container && container.tagName.toLowerCase() == WYMeditor.PRE) {
        e.preventDefault();
        wym.insert('<p></p>');
      }
    }
  }
};

//keyup handler, mainly used for cleanups
WYMeditor.WymClassMozilla.prototype.keyup = function(e) {

  //'this' is the doc
  if ((wym = WYMeditor.INSTANCES[this.title]) != null)
  {
    wym._selected_image = null;
    $(wym._iframe).contents().find('.selected_by_wym').removeClass('selected_by_wym');
    var container = null;

    if(e.keyCode == 13 && !e.shiftKey) {
      //RETURN key - cleanup <br><br> between paragraphs
      $(wym._doc.body).children(WYMeditor.BR).remove();

      //fix PRE bug #73
      if((container = wym.selected()) && container.tagName.toLowerCase() == WYMeditor.PRE) {
        wym._exec(WYMeditor.FORMAT_BLOCK, WYMeditor.P); //create P after PRE
      }
    }
    else if(($.inArray(e.keyCode, [8, 17, 46, 224]) == -1) && !e.metaKey && !e.ctrlKey) {
      //NOT BACKSPACE, NOT DELETE, NOT CTRL, NOT COMMAND
      //text nodes replaced by P
      wym.format_block();
    }
  }
};

WYMeditor.WymClassMozilla.prototype.enableDesignMode = function() {
    if(this._doc.designMode == "off") {
      try {
        this._doc.designMode = "on";
        this._doc.execCommand("styleWithCSS", '', false);
      }
      catch(e) { }
    }
};

WYMeditor.WymClassMozilla.prototype.openBlockTag = function(tag, attributes)
{
  var attributes = this.validator.getValidTagAttributes(tag, attributes);

  // Handle Mozilla styled spans
  if(tag == 'span' && attributes.style) {
    var new_tag = this.getTagForStyle(attributes.style);
    if(new_tag){
      this._tag_stack.pop();
      var tag = new_tag;
      this._tag_stack.push(new_tag);
      attributes.style = '';
    } else {
      return;
    }
  }

  this.output += this.helper.tag(tag, attributes, true);
};

WYMeditor.WymClassMozilla.prototype.getTagForStyle = function(style) {

  if(/bold/.test(style)) return 'strong';
  if(/italic/.test(style)) return 'em';
  if(/sub/.test(style)) return 'sub';
  if(/super/.test(style)) return 'super';
  return false;
};