Question

我正在分发一个firefox插件https://github.com/jixiuf/firefox-passwordmaker

用热键创建一个面板我希望隐藏面板后，密码字段可以获得焦点。在创建面板后，当前的显示窗口（选项卡）似乎失去焦点。在pannel hide之后它无法恢复。

var windows = require("sdk/windows");
browserWindows=windows.browserWindows;
  var lastFocusedWindow;        // do not use this ,use getLastFocusedWindow()
  function getLastFocusedWindow() {
    if (lastFocusedWindow==undefined) {
      if (browserWindows.length==1) {
        lastFocusedWindow=browserWindows[0];
      }
    }
    return lastFocusedWindow;
  }

  var panel = panels.Panel({
    contentURL: self.data.url("panel.html"),
    contentScriptFile: scripts,
    height: 170,
    onHide: function handleHide() {

      getLastFocusedWindow().activate(); //this doesnot work 
      getLastFocusedWindow().tabs.activeTab.activate(); //this doesnot work
      tabWorkers[tabs.activeTab.id].port.emit("set-focus");//
    }
  });

self.port.on("set-focus", function() {  
  if (lastFocusedInputEl!=undefined) {
    // if last focused password field is not undefined,then auto fill it.
    lastFocusedInputEl.focus();// this doesnot work
  }
})

Answer 1

有焦点管理器，您可以使用它来获取整个窗口或子帧等最近关注的元素。这是一个片段：

var exampleTabSelected = function(event) {
    window.setTimeout(function(){
        var fm = Components.classes["@mozilla.org/focus-manager;1"].getService(Components.interfaces.nsIFocusManager);
        var aXULWindow = window;
        //if fm.focusedWindow == [object ChromeWindow] then it == aXULWindow
        //if fm.focusedWindow == [object XrayWrapper [object Window]] then it is aXULWindow.gBrowser.contentWindow
        //Cu.reportError(fm.focusedWindow)
        //Cu.reportError(fm.focusedWindow == aXULWindow.gBrowser.contentWindow)
        if (fm.focusedWindow == window) {
            Cu.reportError(fm.focusedElement.nodeName);
            var browserInTab = event.target.linkedBrowser;
            var aFocusedWindow = {};
            var subFocusedEl = fm.getFocusedElementForWindow(browserInTab.contentWindow, true, aFocusedWindow);
            Cu.reportError('focused of tab contents window: ' + subFocusedEl)
            Cu.reportError('subFocusedEl has caret = ' + subFocusedEl.
        }
    }, 10); //can be 1ms
}
gBrowser.tabContainer.addEventListener("TabSelect", exampleTabSelected, false);

面板关闭后如何重新聚焦（firefox添加）

1 个答案: