// Internal (private) properties.  
// RichEditor is the global RichEditor object (function) of which there is only
// 1 instance.
RichEditor.txtView = true;         // WYSIWYG mode.  false == View Source

// initEditor(): Initialise the editor (called on window load, see below)
function initEditor()
{
	// Apply style data if supplied
	if (!public_description.styleData) {
	  public_description.put_styleData(null);
	}

	// Apply default editor options
	var strDefaults = 'dragdrop=no;source=yes';
	strDefaults += ';history=' + (document.queryCommandSupported('Undo') ? 'yes' : 'no');
	applyOptions(strDefaults);

	// Prepare the editable region
	loading.style.display = 'none';
  doc.contentEditable = "true";
  editor.style.visibility = 'visible';
  if(parent.document.all("IMG_ATTACHMENT_MODULE"))
     document.all("IMG_ATTACHMENT_MODULE").value=parent.document.all("IMG_ATTACHMENT_MODULE").value;
  if(parent.document.all("IMG_ATTACHMENT_YM"))
     document.all("IMG_ATTACHMENT_YM").value=parent.document.all("IMG_ATTACHMENT_YM").value;
  if(parent.document.all("IMG_ATTACHMENT_ID"))
     document.all("IMG_ATTACHMENT_ID").value=parent.document.all("IMG_ATTACHMENT_ID").value;
  if(parent.document.all("IMG_ATTACHMENT_NAME"))
     document.all("IMG_ATTACHMENT_NAME").value=parent.document.all("IMG_ATTACHMENT_NAME").value;
  
	// OZ - 12-06-2002
	// Put focus into the document (required when no HTML is supplied via docHtml property)
	doc.focus();
}

// checkRange(): make sure our pretend document (the content editable
// DIV with id of "doc") has focus and that a text range exists (which
// is what execCommand() operates on).
function checkRange()
{
   RichEditor.selectedImage = null;
   if (!RichEditor.txtView) return;      // Disabled in View Source mode
   doc.focus();
   if (document.selection.type == "None") {
      document.selection.createRange();
   }
var r = document.selection.createRange();
   DBG(1, 'RANGE Bounding('
            + 'top='+r.boundingHeight
            + ', left='+r.boundingHeight
            + ', width='+r.boundingWidth
            + ', height='+r.boundingHeight + ')'
         + ', Offset('
            + 'top='+r.offsetTop
            + ', left='+r.offsetLeft + ')'
         + ', Text=(' + r.text + ')'
         + ', HTML=(' + r.htmlText + ')'
      );
}

// post(): Called in response to clicking the post button in the
// toolbar. It fires an event in the container named post, passing the
// HTML of our newly edited document as the data argument.
function post()
{
   //DBG(1, 'Raise "post" event');
   //window.external.raiseEvent("post", doc.innerHTML);
   //alert(doc.innerHTML);
   return doc.innerHTML;
}

// insert(): called in response to clicking the insert table, image,
// smily icons in the toolbar.  Loads up an appropriate dialog to
// prompt for information, the dialog then returns the HTML code or
// NULL.  We paste the HTML code into the document.
function insert(what)
{
   if (!RichEditor.txtView) return;      // Disabled in View Source mode

   DBG(1, 'insert' + what + ')');

   // Chose action based on what is being inserted.
   switch(what)
   {
   case "table":
      strPage = "dlg_ins_table.html";
      strAttr = "status:no;dialogWidth:340px;dialogHeight:360px;help:no";
      break;
   case "smile":
      strPage = "dlg_ins_smile.html";
      strAttr = "status:no;dialogWidth:300px;dialogHeight:350px;help:no";
      break;
   case "char":
      strPage = "dlg_ins_char.html";
      strAttr = "status:no;dialogWidth:450px;dialogHeight:290px;help:no";
      break;
   case "image":
      strPage = "dlg_ins_image.html";
      strAttr = "status:no;dialogWidth:400px;dialogHeight:210px;help:no";' '
      break;
   case "about":
      strPage = "dlg_about.html";
      strAttr = "status:no;dialogWidth:250px;dialogHeight:130px;help:no";' '
      break;
   }

   // run the dialog that implements this type of element
   html = showModalDialog(strPage, window, strAttr);

   // and insert any result into the document.
   if (html) {
      insertHtml(html);
   }
}

// insertHtml(): Insert the supplied HTML into the current position
// within the document.
function insertHtml(html)
{
   doc.focus();
   var sel = document.selection.createRange();
   // don't try to insert HTML into a control selection (ie. image or table)
   if (document.selection.type == 'Control') {
      return;
   }
   
   sel.pasteHTML(html);
}

// doStyle(): called to handle the simple style commands such a bold,
// italic etc.  These require no special handling, just a call to
// execCommand().  We also call reset so that the toolbar represents
// the state of the current text.
//
// 2002-07-30 Updated based on patch submitted by Michael Keck (mkkeck) 
//
function doStyle(s){ 
   if(!RichEditor.txtView) return; 
   /* Disabled in View Source mode */ 
   DBG(1, 'doStyle(' + s + ')'); 
   checkRange(); 
   if(s!='InsertHorizontalRule'){ 
      /* what command string? */ 
      document.execCommand(s); 
   } else if( s=='InsertHorizontalRule') { 
      /* if s=='InsertHorizontalRule then use this command */ 
      document.execCommand(s,false, null); 

      /* Note: 
      In your source view the <HR> has an ID like this 
      <HR id=null> 
      */ 
   } 
   reset(); 
} 


// link(): called to insert a hyperlink.  It will use the selected text
// if there is some, or the URL entered if not.  If clicked when over a
// link, that link is allowed to be edited.
function link(on)
{
   if (!RichEditor.txtView) return;      // Disabled in View Source mode

   var strURL = "http://";
   var strText;

   // First, pick up the current selection.
   doc.focus();
   var r = document.selection.createRange();
   var el = r.parentElement();

   // Is this aready a link?
   if (el && el.nodeName == "A") {
      r.moveToElementText(el);
      if (!on) {      // If removing the link, then replace all with
         r.pasteHTML(el.innerHTML);
         return;
      }
      strURL = el.href;
   }

   // Get the text associated with this link
   strText = r.text;

   // Prompt for the URL
   strURL = window.prompt("輸入地址：", strURL);
   if (strURL) {
      // Default the TEXT to the url if non selected
      if (!strText || !strText.length) {
         strText = strURL;
      }

      // Replace with new URL
      r.pasteHTML('<A href=' + strURL + ' target=_new>' + strText + '</a>');
   }

   reset();
}

// sel(); similar to doStyle() but called from the dropdown list boxes
// for font and style commands.
function sel(el)
{
   if (!RichEditor.txtView) return;      // Disabled in View Source mode
   checkRange();
   switch(el.id)
   {
   case "ctlFont":
      document.execCommand('FontName', false, el[el.selectedIndex].value);
      break;
   case "ctlSize":
      document.execCommand('FontSize', false, el[el.selectedIndex].value);
      break;
   case "ctlStyle":
      document.execCommand('FormatBlock', false, el[el.selectedIndex].text);
      break;
   }
   doc.focus();
   reset();
}

// pickColor(): called when the text or fill color icons are clicked.  Displays
// the color chooser control.  The color setting is completed by the event
// handler of this control (see richedit.html)
function pickColor(fg)
{
   if (!RichEditor.txtView) return;      // Disabled in View Source mode
   checkRange();
   var el = window.event.srcElement;
   if (el && el.nodeName == "IMG") {
      setState(el, true);
   }
   color.style.top = window.event.clientY + 10;
   color.style.left = window.event.clientX - 100;
   color.style.display = 'block';
   color._fg = fg;
}

// setColor(): called from the fore/back color selection dialog event handler
// to set/reset the fore/background color.
function setColor(name, data)
{
   color.style.display = 'none';
   checkRange();
   if (!data) {
      removeFormat(document.selection.createRange(), color._fg);
   } else {
      document.execCommand(color._fg, false, data);
   }
   setState(btnText, false);
   setState(btnFill, false);
   doc.focus();
}

// removeFormat(): Called to remove specific formats from the selected text.
// The 'removeFormat' command removes all formatting.  The principle behind
// this routine is to have a list of the possible formats the selection may
// have, check the selection for the current formats, ignoreing the one we
// want to use, then remove all formatting and then re-apply all but the
// one we wanted to remove.
function removeFormat(r, name)
{
   var cmd = [ "Bold", "Italic", "Underline", "Strikethrough", "FontName", "FontSize", "ForeColor", "BackColor" ];
   var on = new Array(cmd.length);
   for (var i = 0; i < cmd.length; i++) {
      on[i] = name == cmd[i] ? null : r.queryCommandValue(cmd[i]);
   }
   r.execCommand('RemoveFormat');
   for (var i = 0; i < cmd.length; i++) {