rte.js

极限网络智能办公系统—MYOA26—100％—源程序。

// setValue(): called from reset() to make a select list show the current font
// or style attributes
function selValue(el, str)
{
   if (!RichEditor.txtView) return;      // Disabled in View Source mode
   for (var i = 0; i < el.length; i++) {
      if ((!el[i].value && el[i].text == str) || el[i].value == str) {
         el.selectedIndex = i;
         return;
      }
   }
   el.selectedIndex = 0;
}

// setState(): called from reset() to make a button represent the state
// of the current text.  Pressed is on, unpressed is off.
function setState(el, on)
{
   if (!RichEditor.txtView) return;      // Disabled in View Source mode
   if (!el.disabled) {
      if (on) {
         el.defaultState = el.className = "down";
      } else {
         el.defaultState = el.className = null;
      }
   }
}

// getStyle(): called to obtain the class or type of formatting applied to an element,
// This is used by reset() to set the state of the toolbar to indicate the class of
// the current element.
function getStyle() {
   var style = document.queryCommandValue('FormatBlock');
   if (style == "Normal") {
      doc.focus();
      var rng = document.selection.createRange();
      if (typeof(rng.parentElement) != "undefined") {
         var el = rng.parentElement();
         var tag = el.nodeName.toUpperCase();
         var str = el.className.toLowerCase();
         if (!(tag == "DIV" && el.id == "doc" && str == "textedit")) {
            if (tag == "SPAN") {
               style = "." + str;
            } else if (str == "") {
               style = tag;
            } else {
               style = tag + "." + str;
            }
         }
         return style;
      }
   }
   return style;
}

// getfontface(): called to obtain the face attribute applied to a font tag,
// This is used by reset() to set the state of the toolbar to indicate the class of
// the current element.
function getfontface()
{
var family = document.selection.createRange(); //create text range

// don't get font face for image or table
if (document.selection.type == 'Control') {
   return;
}

var el = family.parentElement(); //get parent element
var tag = el.nodeName.toUpperCase(); //convert tag element to upper case

	if (typeof(el.parentElement) != "undefined" && tag == "FONT") { //only do function if tag is font - this is for greater execution speed
		var elface = el.getAttribute('FACE'); //get the font tags FACE attribute
		return elface; //return the value of the face attribute to the reset() function
	}
}

// markSelectedElement(): called by onClick and onKeyup events
// on the contectEditable area
function markSelectedElement() {

   RichEditor.selectedImage = null;

   var r = document.selection.createRange();

   if (document.selection.type != 'Text') {
      if (r.length == 1) {
         if (r.item(0).tagName == "IMG") {
            RichEditor.selectedImage = r.item(0);
         }
      }
   }
}

// reset(): called from all over the place to make the toolbar
// represent the current text. If el specified, it was called from
// hover(off)
function reset(el)
{
   if (!RichEditor.txtView) return;      // Disabled in View Source mode
   if (!el) color.style.display = 'none';
   if (!el || el == ctlStyle)         selValue(ctlStyle, getStyle());
   if (!el || el == ctlFont)         selValue(ctlFont, getfontface());
   if (!el || el == ctlSize)         selValue(ctlSize, document.queryCommandValue('FontSize'));
   if (!el || el == btnBold)         setState(btnBold, document.queryCommandValue('Bold'));
   if (!el || el == btnItalic)         setState(btnItalic,   document.queryCommandValue('Italic'));
   if (!el || el == btnUnderline)      setState(btnUnderline, document.queryCommandValue('Underline'));
   if (!el || el == btnStrikethrough)   setState(btnStrikethrough, document.queryCommandValue('Strikethrough'));
   if (!el || el == btnLeftJustify)   setState(btnLeftJustify, document.queryCommandValue('JustifyLeft'));
   if (!el || el == btnCenter)         setState(btnCenter,   document.queryCommandValue('JustifyCenter'));
   if (!el || el == btnRightJustify)   setState(btnRightJustify, document.queryCommandValue('JustifyRight'));
   if (!el || el == btnFullJustify)   setState(btnFullJustify, document.queryCommandValue('JustifyFull'));
   if (!el || el == btnNumList)      setState(btnNumList, document.queryCommandValue('InsertOrderedList'));
   if (!el || el == btnBulList)      setState(btnBulList, document.queryCommandValue('InsertUnorderedList'));
}

// hover(): Handles mouse hovering over toolbar buttons
function hover(on)
{
   if (!RichEditor.txtView) return;      // Disabled in View Source mode
   var el = window.event.srcElement;
   if (el && !el.disabled && el.nodeName == "IMG" && el.className != "spacer") {
      if (on) {
         el.className = "hover";
      } else {
         el.className = el.defaultState ? el.defaultState : null;
      }
   }
}
// hover(): Handles mouse clicks on toolbar buttons
function press(on)
{
   if (!RichEditor.txtView) return;      // Disabled in View Source mode
   var el = window.event.srcElement;
   if (el && !el.disabled && el.nodeName == "IMG" && el.className != "spacer") {
      if (on) {
         el.className = "down";
      } else {
         el.className = el.className == "down" ? "hover" : el.defaultState ? el.defaultState : null;
      }
   }
}

// addTag(): This is the handler for the style dropdown.  This takes value
// selected and interprates it and makes the necessary changes to the HTML to
// apply this style.
function addTag(obj) {

   if (!RichEditor.txtView) return;      // Disabled in View Source mode

   // Determine the type of element we are dealing with.
   // TYPE 0 IS NORMAL-TAG, 1 IS CLASS, 2 IS SUBCLASS, 3 = Format Block command
   var value = obj[obj.selectedIndex].value;
   if (!value) {                        // Format Block
      sel(obj);
      return;
   }

   var type = 0;                        // TAG

   if (value.indexOf(".") == 0) {            // .className
      type = 1;
   } else if (value.indexOf(".") != -1) {      // TAG.className
      type = 2;
   }

   doc.focus();

   // Pick up the highlighted text
   var r = document.selection.createRange();
   r.select();
   var s = r.htmlText;

   // If we have some selected text, then ignore silly selections
   if (s == " " || s == "&nbsp;") {
      return;
   }

   // How we apply formatting is based upon the type of formitting being
   // done.
   switch(type)
   {
   case 1:
      // class: Wrap the selected text with a span of the specified
      // class name
      value = value.substring(1,value.length);
      r.pasteHTML("<span class="+value+">" + r.htmlText + "</span>")
      break;

   case 2:
      // subclass: split the value into tag + class
      value = value.split(".");
      r.pasteHTML('<' + value[0] + ' class="' + value[1] +'">'
               + r.htmlText
               + '</' + value[0] + '>'
            );
      break;

   default:
      // TAG: wrap up the highlighted text with the specified tag
      r.pasteHTML("<"+value+">"+r.htmlText+"</"+value+">")
      break;
   }
}

// initStyleDropdown(): This takes the passed styleList and generates the style
// dropdown list box from it.
function initStyleDropdown(styleList) {

   // Build the option list for the styles dropdown from the passed styles
   for (var i = 0; i < styleList.length; i++) {
      var oOption = document.createElement("OPTION");
      if (styleList[i][0]) oOption.value = styleList[i][0];
      oOption.text = styleList[i][1];
      oOption.style.backgroundColor = 'white';
      document.all.ctlStyle.add(oOption);
   }
}

// applyOptions(): This takes the passed options string and actions them.
// Called during the init process.
function applyOptions(str)
{
   var options = str.split(";");
   for (var i = 0; i < options.length; i++) {
      var eq = options[i].indexOf('=');
      var on = eq == -1 ? true : "yes;true;1".indexOf(options[i].substr(eq+1).toLowerCase()) != -1;
      var name = eq == -1 ? options[i] : options[i].substr(0,eq);
      var el = document.all("feature" + name);
      if (el) {
         el.runtimeStyle.display = (on ? 'inline' : 'none'); 
      } else {
         if (!RichEditor.aOptions) RichEditor.aOptions = new Array;
         RichEditor.aOptions[name] = on;
      }
   }
}

// getOption(): Get the value for a previously set option or return undefined if
// the option is not set.
function getOption(name)
{
   if (RichEditor.aOptions) return RichEditor.aOptions[name];
   return;   // Undefined
} 

// Handle drag and drop events into the editor window.  Until we
// work out how to handle these better (which requires co-operation
// from the code being dragged from as far as I can tell) we simply
// disable the functionality.
function handleDrag(n)
{
   // if drag and drop is disabled, then cancel the dragdrop
   // events
   if (!getOption("dragdrop"))
   {
      switch(n) {
      case 0:   // ondragenter
         window.event.dataTransfer.dropEffect = "none";
         break;
      }
      // Cancel the event
      window.event.returnValue = false;
   }
}