如何以编程方式单击GMail中的“撰写”按钮并使用greasemonkey?

时间:2011-01-03 19:55:27

标签: javascript gmail greasemonkey

我正在为GMail创建一个脚本,它要求我复制左侧的各种链接,如收件箱,所有邮件,垃圾邮件和撰写。 我有所有的链接工作,除了撰写。当我点击时,我无法弄清楚会发生什么。你可以在下面找到我的代码。我很感激任何帮助

// ==UserScript==
// @name           GMC Test
// @namespace      com.pbg
// @description    test
// @include        http*://mail.google.com*
// ==/UserScript==

//loading function
function tryAgain(tries) {
    setTimeout(function() { init(tries++); }, 1000*tries);
}

//gets a node by XPath
function getNodeByXPath(expression, parent) {
   var r = parent.evaluate(expression, parent, null, XPathResult.ORDERED_NODE_ITERATOR_TYPE, null);
   return ((r != null) ? r.iterateNext() : null);
}

//initialize
function init(tries) {

   tries = tries || 0;
   if (tries > 3) return; // give up, too many tries
   // Locate the canvas_frame iframe
   var f = document.getElementById("canvas_frame");
   if (f == null) return tryAgain(tries);
   // Locate the document
   var doc = f.contentWindow.document;
   if (doc == null) return tryAgain(tries);
   // make sure all the links are loaded
   if (getNodeByXPath("//a[contains(@href,'#inbox')]", doc) == null) return tryAgain(tries);

   go();
}
function go() {

   function fireEvent(xPath,event)//https://developer.mozilla.org/en/DOM/element.dispatchEvent
   {
      var evt = document.createEvent("MouseEvents");
      evt.initMouseEvent(event, true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
      var cb = getNodeByXPath(xPath, doc);
      var canceled = !cb.dispatchEvent(evt);
      GM_log("event canceled = " + canceled);
   }
   var doc = document.getElementById("canvas_frame").contentWindow.document;

   //THE LINE BELOW WORKS
   //setTimeout(function(){GM_log("let's click starred!");fireEvent("//a[contains(@href,'#starred')]", "click")}, 5000); 

   //THIS DOENS'T WORK
   setTimeout(function(){GM_log("now let's click compose!");fireEvent("//div[@class='J-Zh-I J-J5-Ji L3')]", "click")}, 5000);
}

window.addEventListener('load', init, false );

1 个答案:

答案 0 :(得分:3)

如果您使用较新的AJAX-y样式GMail,您可以将页面的href更改为compose url,如下所示*并让页面的事件处理程序像往常一样触发/处理标签更改:

document.location.href = "#compose";

或者,如果您使用的是基本HTML视图,则可以使用xPath查找撰写邮件锚点并更改document.location.href以匹配链接指向的任何内容。

我确信可以编写更优雅/更有弹性的xPath,但是现在简单的说明表明它的accesskey属性设置为c,这可能足以区分正确的链接:

var nodesSnapshot = document.evaluate(
    '//*[@accesskey="c"]', 
     document,
     null,
     XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,
     null
  );

document.location.href = nodesSnapshot.snapshotItem(0).href;

* nb:两者都经过测试并且在Firebug中工作,但由于在AJAX-y视图/其他因素等中使用了iFrame,可能在Greasemonkey脚本中的工作方式不同