Firefox扩展：获取选定的文本

问题描述

我正在研究一个简单的Firefox扩展，我想获取选定的文本。我试过这个：

  
你的问题是 document.commandDispatcher.focusedWindow 将会指向一个chrome窗口，我怀疑你真的想要一个内容窗口，试着用 content.getSelection（）来替换它。 c $ c> 
 
I am working on a simple Firefox Extension and I want to get the selected text. I tried this:
var WordCount = {
    /* ... */
    changeSelected: function() {
        var selectedText = this.getSelection();
        var words = this.countWords(selectedText);
        this.changeStatus(words, " selected");
        //alert(selectedText);
    },
    getSelection: function(e) {
        var focused_window = document.commandDispatcher.focusedWindow;
        var sel_text = focused_window.getSelection();
        return sel_text.toString();    
    }
}
window.addEventListener("select", function(e) { WordCount.changeSelected(); }, false);
The Problem is, that I dont get the selection with document.commandDispatcher.focusedWindow.getSelection() and I don't know why :(
 解决方案 
Your problem is that document.commandDispatcher.focusedWindow is going to be pointing to a chrome window, where I suspect you actually want a content window.  Try replacing that with content.getSelection()
                        
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