Flex 文本控件实现自定义复制粘贴

由于添加了自定义右键菜单，导致Textinput控件默认的右键复制粘贴功能被屏蔽了。最后通过JS脚本实现这个功能，参考代码如下

 <?xml version="1.0" encoding="utf-8"?>
 <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
                xmlns:s="library://ns.adobe.com/flex/spark"
                xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" creationComplete="init()">
     <s:layout>
         <s:VerticalLayout/>
     </s:layout>
     <fx:Declarations>
         <!-- 将非可视元素（例如服务、值对象）放在此处 -->
         <fx:XML id="jsxml" >
             <script>
                 <![CDATA[

                     function clipboardOperator(type,browsername,txt){
                         if(type!="init"){
                             if(type=="copy"){
                                 window.clipboardData.setData("Text", txt);
                                 return;
                             }
                             else if(type=="paste"){
                                 var clipboard=window.clipboardData.getData("Text");
                                 if(clipboard == null){
                                     alert('您的剪切板中没有任何文本内容');
                                     return ;
                                 }
                                 else
                                     return clipboard;
                             }
                         }
                     }
                 ]]>
             </script>
         </fx:XML>
     </fx:Declarations>
     <fx:Script>
         <![CDATA[
             import Class.URLUtil;

             import flash.external.ExternalInterface;

             import flash.desktop.Clipboard;
             import flash.desktop.ClipboardFormats;
             import mx.controls.Alert;

             private var browsername:String=URLUtil.getBrowserName();

             private function init():void{

                 lbpaste.text=ExternalInterface.call(jsxml, "init");
             }

             protected function btncopy_clickHandler(event:MouseEvent):void
             {
                 //内部复制功能
                 Clipboard.generalClipboard.clear();
                 Clipboard.generalClipboard.setData(ClipboardFormats.TEXT_FORMAT,txt.text,false);
                 //调用JS脚本实现复制
 //                ExternalInterface.call("copypasteOperator","copy", txt.text);
             } 

             protected function btnpaste_clickHandler(event:MouseEvent):void
             {
                 lbpaste.text=ExternalInterface.call("clipboardOperator","paste",browsername);
             }
         ]]>
     </fx:Script>
     <s:TextInput id="txt" text="aaa"/>
     <s:Button id="btncopy" label="复制" click="btncopy_clickHandler(event)"/>
     <s:Button id="btnpaste" label="粘贴" click="btnpaste_clickHandler(event)"/>
     <s:Label id="lbpaste"/>
 </s:Application>

注：目前只支持IE和搜狗浏览器