在Chrome扩展程序中触发快捷键 [英] Trigger shortcut in a Chrome extension

问题描述

我正在构建Chrome扩展程序，并将命令 _execute_browser_action 分配给 Alt + J 。我想在background.js中模拟这个，它使用

  chrome.commands.onCommand.addListener（function（command ）{/ * ... * /}）; 
  

我想要 _execute_browser_action 通过不同的命令快捷方式，比如 Cmd + Shift + K

json我已经声明如下：

$ $ $ $ $ code $$$ {$ b $ _execute_browser_action{
建议_键：{
mac：Alt + J，
linux：Ctrl + Shift + J
}
}，
asdf ：{
suggested_key：{
default：Ctrl + Shift + K，
mac：Command + Shift + K
}，
description：asdf
}
}

是我的background.js：

  chrome.commands.onCommand.addListener（函数（command）{
 console.log （'onCommand event for message：'，command）; 
 if（command ===asdf）{
 alert（asdf）; 
 var keyPress = jQuery.Event（ keypress）; 
 keyP ress.altKey = true; 
 keyPress.ctrlKey = false; 
 keyPress.which = 74; 
 //我如何触发这个？ 
} 
}）; 
  

我想知道如何触发此操作，以便我的popup.html打开。

解决方案

您无法自行触发键盘快捷键。

方式作为事件的时间线：

1. 发生硬件事件，并由OS转换为输入事件。
   
2. 如果这是Chrome注册的全球快捷方式，或者Chrome专注于，则操作系统会将该事件分派给Chrome。


3. Chrome会检查它是否为已注册的快捷方式。如果是，则触发相应的事件。


4. 如果它不是快捷方式，且页面处于焦点状态，则Chrome将事件作为DOM输入事件传递到页面中。


5. 如果页面中有jQuery，它会将该DOM事件转换为其自己的内部事件，匹配侦听器并将内部事件分发给它们。
   

您的代码仅触发5个（内部jQuery事件）。

通过直接操纵DOM事件，你可以上升到4.

在任何情况下，扩展都不能返回到3这个堆栈。

您试图以代码的迂回方式打开弹出窗口。不幸的是，这是根本不可能为普通扩展 - 对Chrome开发团队的一部分进行有意识的决定。

想想另一种提供UI的方式，比如通知或在内容脚本。

I am building a Chrome extension, and assigned command _execute_browser_action to Alt+J. I want to simulate this in background.js which listens for all commands using

chrome.commands.onCommand.addListener(function(command) { /* ... */ });

I want _execute_browser_action to be called through a different command shortcut, say Cmd+Shift+K

In my manifest.json I have declared the following:

"commands": {
    "_execute_browser_action": {
        "suggested_key": {
          "mac": "Alt+J",
          "linux": "Ctrl+Shift+J"
        }
    },
    "asdf" : {
        "suggested_key": {
          "default": "Ctrl+Shift+K",
          "mac": "Command+Shift+K"
        },
        "description": "asdf"
    }
  }

This is my background.js:

chrome.commands.onCommand.addListener(function(command) {
  console.log('onCommand event received for message: ', command);
  if (command === "asdf") {
    alert("asdf");
    var keyPress = jQuery.Event("keypress");
    keyPress.altKey = true;
    keyPress.ctrlKey = false;
    keyPress.which = 74;
    //how do I trigger this?
  }
});

I want to know how to trigger this so that my popup.html opens.

解决方案

You can't trigger keyboard shortcuts on your own.

Think of it this way as a timeline of events:

1. A hardware event occurs, and is translated by OS into input event.
2. If it's a global shortcut that Chrome registered, or if Chrome is focused, OS dispatches the event to Chrome.
3. Chrome checks if it's a registered shortcut. If yes, the corresponding event is triggered.
4. If it's not a shortcut, and a page is in focus, Chrome passes the event into the page as a DOM input event.
5. If there is jQuery in the page, it converts that DOM event into its own internal event, matches the listeners and dispatches the internal event to them.

Your code only triggers 5 (internal jQuery events).
By directly manipulating DOM events, you can go up to 4.
Under no circumstance can an extension go back to 3 in this stack.

You're trying to open your popup in a roundabout way from code. Sadly, this is simply not possible at all for "ordinary" extensions - a conscious decision on part of Chrome dev team.

Think of another way to provide UI, say, notifications or injecting something in the current page with Content Scripts.

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