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[收藏]Firefox下Clipboard的读写js脚本

2010-09-29 01:04 197 查看
抄袭转载自：http://blog.csdn.net/avon520/archive/2008/08/18/2790590.aspx

//Firefox下Clipboard的读写js脚本

/**************************************************
http://www.krikkit.net/howto_javascript_copy_clipboard.html
将字符串maintext复制到剪贴板
**************************************************/
function setClipboard(maintext) {
if (window.clipboardData) {
return (window.clipboardData.setData("Text", maintext));
}
else if (window.netscape) {
netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
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('text/unicode');
var str = new Object();
var len = new Object();
var str = Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);
var copytext=maintext;
str.data=copytext;
trans.setTransferData("text/unicode",str,copytext.length*2);
var clipid=Components.interfaces.nsIClipboard;
if (!clip) return false;
clip.setData(trans,null,clipid.kGlobalClipboard);
return true;
}
return false;
}
/**************************************************
http://www.codebase.nl/index.php/command/viewcode/id/174
返回剪贴板的内容
**************************************************/
function getClipboard() {
if (window.clipboardData) {
return(window.clipboardData.getData('Text'));
}
else if (window.netscape) {
netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
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('text/unicode');
clip.getData(trans,clip.kGlobalClipboard);
var str = new Object();
var len = new Object();
try {
trans.getTransferData('text/unicode',str,len);
}
catch(error) {
return null;
}
if (str) {
if (Components.interfaces.nsISupportsWString) str=str.value.QueryInterface(Components.interfaces.nsISupportsWString);
else if (Components.interfaces.nsISupportsString) str=str.value.QueryInterface(Components.interfaces.nsISupportsString);
else str = null;
}
if (str) {
return(str.data.substring(0,len.value / 2));
}
}
return null;
}

下面的代码可以直接保存成HTML运行。该代码支持IE/Firefox但不支持Chrome/Safari，需要后续探讨。

<html>
<head>
<title>onpaste event example</title>
</head>

<body>
<h3>Play with this editor!</h3>
<div>
<span style="color:red">Copy this text.</span>
</div>
<textarea id="editor" rows="3" cols="80">
Try pasting text into this area!
</textarea>
<div id="editdiv" contenteditable="true">
..
</div>

<script type="text/javascript">
//Firefox下Clipboard的读写js脚本
/**************************************************
将字符串maintext复制到剪贴板
**************************************************/
function setClipboard(maintext) {
if (window.clipboardData) {
return (window.clipboardData.setData("Text", maintext));
}
else if (window.netscape) {
netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
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('text/unicode');
var str = new Object();
var len = new Object();
var str = Components.classes["@mozilla.org/supports-string;1"].createInstance(Components.interfaces.nsISupportsString);
var copytext=maintext;
str.data=copytext;
trans.setTransferData("text/unicode",str,copytext.length*2);
var clipid=Components.interfaces.nsIClipboard;
if (!clip) return false;
clip.setData(trans,null,clipid.kGlobalClipboard);
return true;
}
return false;
}
/**************************************************
返回剪贴板的内容
**************************************************/
function getClipboard() {
if (window.clipboardData) {
return(window.clipboardData.getData('Text'));
}
else if (window.netscape) {
netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
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('text/unicode');
clip.getData(trans,clip.kGlobalClipboard);
var str = new Object();
var len = new Object();
try {
trans.getTransferData('text/unicode',str,len);
}
catch(error) {
return null;
}
if (str) {
if (Components.interfaces.nsISupportsWString) str=str.value.QueryInterface(Components.interfaces.nsISupportsWString);
else if (Components.interfaces.nsISupportsString) str=str.value.QueryInterface(Components.interfaces.nsISupportsString);
else str = null;
}
if (str) {
return(str.data.substring(0,len.value / 2));
}
}
return null;
}
function log(txt) {
document.getElementById("log").appendChild(document.createTextNode(txt + "\n"));
}

function pasteIntercept(evt) {
var txt = getClipboard();
setClipboard(txt);
log("Pasting!");
}

document.getElementById("editor").addEventListener("paste", pasteIntercept, false);
document.getElementById("editdiv").addEventListener("paste", pasteIntercept, false);
</script>

<h3>Log</h3>
<textarea rows="15" cols="80" id="log" readonly="true"></textarea>
</body>
</html>
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