javascript - 访问热键对象中的选定文本

Question

是否可以在 Hotkey 范围内抓取用户选择的文本？
在 Addon/lib/main.js 中定义:

var showHotKey = Hotkey({
    combo: "accel-f1",
    onPress: function() {
        Addon.saveText(window.getSelection().toString());
    }
});

错误..

error: Addon: An exception occurred.
ReferenceError: window is not defined
resource://org/Addon/lib/main.js 14
Traceback (most recent call last):
File "resource://gre/modules/commonjs/sdk/keyboard/observer.js", line 39, in handleEvent
    this._emit(event.type, event, event.target.ownerDocument.defaultView);
File "resource://gre/modules/commonjs/sdk/deprecated/events.js", line 123, in _emit
    return this._emitOnObject.apply(this, args);
File "resource://gre/modules/commonjs/sdk/deprecated/events.js", line 153, in _emitOnObject
    listener.apply(targetObj, params);
File "resource://gre/modules/commonjs/sdk/keyboard/hotkeys.js", line 103, in onKeypress
    hotkey();
File "resource://org/Addon/lib/main.js", line 14, in showHotKey<.onPress
    Addon.saveText(window.getSelection().toString());

Answer 1

是的，最简单的方法是使用 selection模块。

var { Hotkey } = require("sdk/hotkeys");
var selection = require("sdk/selection");

var showHotKey = Hotkey({
    combo: "accel-f1",
    onPress: function() {
        console.error(selection.text);
    }
});

如果您需要更复杂的东西，请查看 tabs.activeTab.attach() ，其中有一个示例展示了一般情况下如何与事件选项卡进行交互。