Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
2.3k views
in Technique[技术] by (71.8m points)

macos - Scriptable NPAPI plugin doesn't work with Firefox

I'm developing FF extension and plugin that work in tandem. My Extension injects npapi plugin into the html and calls some method of the plugin after an event occures.

Here is the code I use for injection:

if (window.content.document.getElementById("rondyoHookMessageElement") == null) {
            var element = window.content.document.createElement("object");
            element.type = "application/x-hook-msg";
            element.id = "rondyoHookMessageElement";
            element.width = 0;
            element.height = 0;
            window.content.document.body.appendChild(element);
}

And when I need to use a method of the plugin I do the following:

var element = window.content.document.getElementById("rondyoHookMessageElement");
element.SomeFunc();

I confirm that element is found, but logging the element.SomeFunc returns undefined.

If I inject the npapi plugin manually:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
</head>
<body>
<object id="plugin" type="application/plugin-mime" width=200 height=200 border=5></object>
<script type="text/javascript">
    var plugin = document.getElementById("plugin");
    dump(plugin.SomeFunc + "
");
</script>
</body>
</html>

It returns function SomeFunc() { [native code] }

OS: Mac OS X 10.6.7

FF: 3.6.13

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

If you do this in FireFox 4 you have a decent chance of crashing the browser (the bug has been logged, but not yet fixed). it's not a good idea to set the type of the object tag before injecting it into the DOM; you'll get different behavior on each browser. Wait until you've put the object into the dom and then inject it.

Another possible problem is that it sometimes takes the browser some time after injecting it into the DOM before the plugin is accessible, so if you use a setTimeout to wait for a half second or so it might start working at that point.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

1.4m articles

1.4m replys

5 comments

57.0k users

...