Here is a drop-in method for your classes to copy data to the Clipboard of your operating system.

There are many things that are missing:

• This should be made part of a real clipboard manager class
• So far, only Mozilla-based browsers and Internet Explorer is supported, I have no idea if and how this works in other browsers
• qooxdoo variants should be used to deal with browser differences
• We need a method which gets data from the system clipboard
• Which are the flavors that can be used cross-browser - I have found that only “text/unicode” seems to work so far.

• ...

    /**
     * tries to copy text to the clipboard of the underlying operating system
     * 
     * sources: http://www.krikkit.net/howto_javascript_copy_clipboard.html
     *          http://www.xulplanet.com/tutorials/xultu/clipboard.html
     *          http://www.codebase.nl/index.php/command/viewcode/id/174
     *          
     * works only in Mozilla and Internet Explorer
     * In Mozilla, add this line to your prefs.js file in your Mozilla user profile directory
     *    user_pref("signed.applets.codebase_principal_support", true);
     * or change the setting from within the browser with calling the "about:config" page
     **/
    copyToSystemClipboard : function ( text, flavor )
    {
      if ( ! flavor )
      {
        // default
        flavor = "text/unicode";
      }
      
      if (window.clipboardData) 
      {
    	   // IE
    	   window.clipboardData.setData("Text", text );
      } 
      else if (window.netscape) 
      { 
    	 	// Mozilla, Firefox etc.
        try 
        {
    		  netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect"); 
    		} 
        catch(e) 
        {
    			alert(
    		   	"Because of tight security settings in Mozilla / Firefox you cannot copy "+
    				"to the system clipboard at the moment. Please open the 'about:config' page "+
    				"in your browser and change the preference 'signed.applets.codebase_principal_support' to 'true'."
    				);
    			return false;
    		}
         // we could successfully enable the privilege
    	   var clip = Components.classes['@mozilla.org/widget/clipboard;1'].createInstance(Components.interfaces.nsIClipboard);
    	   if (!clip) return;
    	   var trans = Components.classes['@mozilla.org/widget/transferable;1'].createInstance(Components.interfaces.nsITransferable);
    	   if (!trans) return;
    	   trans.addDataFlavor(flavor);
    	   var str = new Object();
    	   var len = new Object();
    	   var str = Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);
    	   var copytext=text;
    	   str.data=copytext;
    	   trans.setTransferData(flavor,str,copytext.length*2);
    	   var clipid=Components.interfaces.nsIClipboard;
    	   if (!clip) return false;
    	   clip.setData(trans,null,clipid.kGlobalClipboard);
    	   return true;
       } 
       else 
       {
    		alert("Your browser does not support copying to the clipboard!");
       }
    }
 
  }