从我的greasemonkey脚本中听一个事件 [英] Listening to an event from my greasemonkey script

问题描述

我试图弄清楚如何从我的greasemonkey脚本中监听事件发送器，但是我一直在收到访问冲突错误（访问对象的权限被拒绝）。

Page

该页面包含一个简单的事件发射器：

var emitter = function（）{
this.events = {};


emitter.prototype.on = function（eventName，closure）{
this.events [eventName] = this.events [eventName] || [];
this.events [eventName] .push（closure）;
};

emitter.prototype.emit = function（eventName，data）{
if（this.events [eventName]）{
this.events [eventName] .forEach（function fn）{
return fn（data）;
}）;
}
}

var test = new emitter（）;
test.emit（'test'，{data：'test'}）;


脚本

这会引发访问冲突错误（这曾经工作了一阵子，但我想它得到了补丁或什么）：

pre $ unsafeWindow.test.on（' test'，函数（data）{
console.log（data）;
}）;


解决方案

我设法让它工作。解决的办法是通过 exportFunction（myFunction，unsafeWindow）

将回调函数导出到不安全的上下文中看起来像这样：
$ b $ pre $ unsafeWindow.test.on（'test'，exportFunction（function（data）{
console .log（data）;
}，unsafeWindow））;


非常感谢 wOxxOm 指出这一点。

I'm trying to figure out how to listen to an event emitter from my greasemonkey script, but I keep getting access violation errors (Permission denied to access object).

Page
The page contains a simple event emitter:

var emitter = function(){
    this.events = {};
}

emitter.prototype.on = function(eventName, closure){
    this.events[eventName] = this.events[eventName] || [];
    this.events[eventName].push(closure);
};

emitter.prototype.emit = function(eventName, data){
    if(this.events[eventName]){
        this.events[eventName].forEach(function(fn){
            return fn(data);
        });
    }
}

var test = new emitter();
test.emit('test', {data:'test'});

Script
This throws an access violation error (this used to work a while ago, but I guess it got patched or something):

unsafeWindow.test.on('test', function(data){
    console.log(data);
});

解决方案

I managed to get it working. The solution was to export the callback function into unsafe context via exportFunction(myFunction, unsafeWindow)

The script part should look like this:

unsafeWindow.test.on('test', exportFunction(function(data){
   console.log(data);
}, unsafeWindow));

Big thanks to wOxxOm for pointing this out.

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