wysiwyg.js

javascript在线编辑器

		  var buttonID             = buttonObj[0];
	    var buttonTitle          = buttonObj[1];
      var buttonImage          = buttonObj[2];
		  var buttonImageRollover  = buttonObj[3];
	  
		  if (buttonName2[j] == "seperator") {
		    toolbar2 += '<td width="12" align="center"><img src="' +buttonImage+ '" border=0 unselectable="on" width="2" height="18" hspace="2"></td>';
			}
	    else if (buttonName2[j] == "viewSource"){
		    toolbar2 += '<td width="22">';
				toolbar2 += '<span id="HTMLMode' + n + '"><img src="'  +buttonImage+  '" border=0 unselectable="on" title="' +buttonTitle+ '" id="' +buttonID+ '" class="button" onClick="formatText(this.id,\'' + n + '\');" onmouseover="if(className==\'button\'){className=\'buttonOver\'}; this.src=\'' +buttonImageRollover+ '\';" onmouseout="if(className==\'buttonOver\'){className=\'button\'}; this.src=\'' + buttonImage + '\';" unselectable="on"  width="20" height="20"></span>';
				toolbar2 += '<span id="textMode' + n + '"><img src="' +imagesDir+ 'view_text.gif" border=0 unselectable="on" title="viewText"          id="ViewText"       class="button" onClick="formatText(this.id,\'' + n + '\');" onmouseover="if(className==\'button\'){className=\'buttonOver\'}; this.src=\'' +imagesDir+ 'view_text_on.gif\';"    onmouseout="if(className==\'buttonOver\'){className=\'button\'}; this.src=\'' +imagesDir+ 'view_text.gif\';" unselectable="on"  width="20" height="20"></span>';
	      toolbar2 += '</td>';
			}
	    else {
		    toolbar2 += '<td width="22"><img src="' +buttonImage+ '" border=0 unselectable="on" title="' +buttonTitle+ '" id="' +buttonID+ '" class="button" onClick="formatText(this.id,\'' + n + '\');" onmouseover="if(className==\'button\'){className=\'buttonOver\'}; this.src=\'' +buttonImageRollover+ '\';" onmouseout="if(className==\'buttonOver\'){className=\'button\'}; this.src=\'' + buttonImage + '\';" unselectable="on"  width="20" height="20"></td>';
	    }
    }
    j++;
  }

  toolbar2 += '<td>&nbsp;</td></tr></table>';  
 	
	// Create iframe which will be used for rich text editing
	var iframe = '<table cellpadding="0" cellspacing="0" border="0" style="width:' + wysiwygWidth + '; height:' + wysiwygHeight + ';border: 1px inset #CCCCCC;"><tr><td valign="top">\n'
  + '<iframe frameborder="0" id="wysiwyg' + n + '"></iframe>\n'
  + '</td></tr></table>\n';

  // Insert after the textArea both toolbar one and two
  document.all[n].insertAdjacentHTML("afterEnd", toolbar + toolbar2 + iframe);
	
	// Give the iframe the global wysiwyg height and width
  document.getElementById("wysiwyg" + n).style.height = wysiwygHeight;
  document.getElementById("wysiwyg" + n).style.width = wysiwygWidth;
	
	// Pass the textarea's existing text over to the content variable
  var content = document.getElementById(n).value;
	
	var doc = document.getElementById("wysiwyg" + n).contentWindow.document;
	
	// Write the textarea's content into the iframe
  doc.open();
  doc.write(content);
  doc.close();
  
	// Make the iframe editable in both Mozilla and IE
  doc.body.contentEditable = true;
  doc.designMode = "on";
	
	// When a user updates the content in the iframe update the 
	// textarea as well (note: causes undo not to work in IE)
	var browserName = navigator.appName;
	if (browserName == "Microsoft Internet Explorer") {
    doc.onkeyup = function () { 
		  updateTextArea(n);
	  }
  } 
  else {
    doc.addEventListener('keyup',function OnKeyUp() { updateTextArea(n); }, true);
 	}

	// Hide the textarea 
	document.getElementById(n).style.display = 'none'; 
	
	// Insert the Font Type and Size drop downs into the toolbar
	outputFontSelect(n);
	outputFontSizes(n); 
	
	// Hide the dynamic drop down lists for the Font Types and Sizes
  hideFonts(n);
	hideFontSizes(n);
	
	// Hide the "Text Mode" button
	document.getElementById("textMode" + n).style.display = 'none'; 
};



/* ---------------------------------------------------------------------- *\
  Function    : formatText()
  Description : replace textarea with wysiwyg editor
  Usage       : formatText(id, n, selected);
  Arguments   : id - The execCommand (e.g. Bold)
                n  - The editor identifier that the command 
								     affects (the textarea's ID)
                selected - The selected value when applicable (e.g. Arial)
\* ---------------------------------------------------------------------- */
function formatText(id, n, selected) {

  // When user clicks toolbar button make sure it always targets its respective WYSIWYG
  document.getElementById("wysiwyg" + n).contentWindow.focus();
	
	// When in Text Mode these execCommands are disabled
	var formatIDs = new Array("FontSize","FontName","Bold","Italic","Underline","Subscript","Superscript","Strikethrough","Justifyleft","Justifyright","Justifycenter","InsertUnorderedList","InsertOrderedList","Indent","Outdent","ForeColor","BackColor","InsertImage","InsertTable","CreateLink");
  
	// Check if button clicked is in disabled list
	for (var i = 0; i <= formatIDs.length;) {
		if (formatIDs[i] == id) {
			 var disabled_id = 1; 
		}
	  i++;
	}
	
	// Check if in Text Mode and disabled button was clicked
	if (viewTextMode == 1 && disabled_id == 1) {
	  alert ("You are in HTML Mode. This feature has been disabled.");	
	}
	
	else {
	
	  // FontSize
	  if (id == "FontSize") {
      document.getElementById("wysiwyg" + n).contentWindow.document.execCommand("FontSize", false, selected);
	  }
	  
		// FontName
	  else if (id == "FontName") {
      document.getElementById("wysiwyg" + n).contentWindow.document.execCommand("FontName", false, selected);
	  }
	
	  // ForeColor and BackColor
    else if (id == 'ForeColor' || id == 'BackColor') {
      var w = screen.availWidth;
      var h = screen.availHeight;
      var popW = 210, popH = 165;
      var leftPos = (w-popW)/2, topPos = (h-popH)/2;
      var currentColor = _dec_to_rgb(document.getElementById("wysiwyg" + n).contentWindow.document.queryCommandValue(id));
   
	    window.open(popupsDir + 'select_color.html?color=' + currentColor + '&command=' + id + '&wysiwyg=' + n,'popup','location=0,status=0,scrollbars=0,width=' + popW + ',height=' + popH + ',top=' + topPos + ',left=' + leftPos);
    }
	  
		// InsertImage
	  else if (id == "InsertImage") {
      window.open(popupsDir + 'insert_image.html?wysiwyg=' + n,'popup','location=0,status=0,scrollbars=0,resizable=0,width=400,height=190');
	  }
	  
		// InsertTable
	  else if (id == "InsertTable") {
	    window.open(popupsDir + 'create_table.html?wysiwyg=' + n,'popup','location=0,status=0,scrollbars=0,resizable=0,width=400,height=360');
	  }
	  
		// CreateLink
	  else if (id == "CreateLink") {
	    window.open(popupsDir + 'insert_hyperlink.html?wysiwyg=' + n,'popup','location=0,status=0,scrollbars=0,resizable=0,width=300,height=110');
	  }
	  
		// ViewSource
    else if (id == "ViewSource") {
	    viewSource(n);
	  }
		
		// ViewText
		else if (id == "ViewText") {
	    viewText(n);
	  }

		// Help
		else if (id == "Help") {
	    window.open(popupsDir + 'about.html','popup','location=0,status=0,scrollbars=0,resizable=0,width=400,height=330');
	  }
	  
		// Every other command
	  else {
      document.getElementById("wysiwyg" + n).contentWindow.document.execCommand(id, false, null);
	  }
  }
	
	// Update the textarea when user updates respective WYSIWYG
  updateTextArea(n);
};



/* ---------------------------------------------------------------------- *\
  Function    : insertHTML()
  Description : insert HTML into WYSIWYG in rich text
  Usage       : insertHTML(<b>hello</b>, "textareaID")
  Arguments   : html - The HTML being inserted (e.g. <b>hello</b>)
                n  - The editor identifier that the HTML 
								     will be inserted into (the textarea's ID)
\* ---------------------------------------------------------------------- */
function insertHTML(html, n) {

  var browserName = navigator.appName;
	 	 
	if (browserName == "Microsoft Internet Explorer") {
	  document.all['wysiwyg' + n].contentWindow.document.selection.createRange().pasteHTML(html);   
	} 
	 
	else {
	  var div = document.all['wysiwyg' + n].contentWindow.document.createElement("div");
		 
		div.innerHTML = html;
		var node = insertNodeAtSelection(div, n);		
	}
	
}


/* ---------------------------------------------------------------------- *\
  Function    : insertNodeAtSelection()
  Description : insert HTML into WYSIWYG in rich text (mozilla)
  Usage       : insertNodeAtSelection(insertNode, n)
  Arguments   : insertNode - The HTML being inserted (must be innerHTML 
	                           inserted within a div element)
                n          - The editor identifier that the HTML will be 
								             inserted into (the textarea's ID)
\* ---------------------------------------------------------------------- */
function insertNodeAtSelection(insertNode, n) {
  // get current selection
  var sel = document.all['wysiwyg' + n].contentWindow.getSelection();

  // get the first range of the selection
  // (there's almost always only one range)
  var range = sel.getRangeAt(0);

  // deselect everything
  sel.removeAllRanges();

  // remove content of current selection from document
  range.deleteContents();

  // get location of current selection
  var container = range.startContainer;
  var pos = range.startOffset;

  // make a new range for the new selection
  range=document.createRange();

  if (container.nodeType==3 && insertNode.nodeType==3) {

    // if we insert text in a textnode, do optimized insertion
    container.insertData(pos, insertNode.nodeValue);

    // put cursor after inserted text
    range.setEnd(container, pos+insertNode.length);
    range.setStart(container, pos+insertNode.length);
  } 
	
	else {
    var afterNode;
    
		if (container.nodeType==3) {
      // when inserting into a textnode
      // we create 2 new textnodes
      // and put the insertNode in between

      var textNode = container;
      container = textNode.parentNode;