firefox插件：无法侦听firefox“quit-application”事件 [英] firefox addon: not able to listen firefox "quit-application" event

问题描述

 观察：函数（主题，主题，数据）我的代码片段在firefox退出后启用了扩展。 {
 
 if（topic ==quit-application）{
 LOG（in quit-application Testing）; 
 var os = Components.classes [@ mozilla.org/observer-service;1] 
 .getService（Components.interfaces.nsIObserverService）; 
 
 //os.addObserver（this，http-on-examine-cached-response，false）; 
 os.addObserver（this，quit-application，false）; 
 var appInfo = Components.classes [@ mozilla.org/xre/app-info;1] 
 .getService（Components.interfaces.nsIXULAppInfo）; 
 var tempappVersion = appInfo.version; 
 var appVersion = tempappVersion.split（。）; 
 //在插件上为FF4及更高版本添加附加侦听器dsable事件。 
 if（appVersion [0]> = 4）{
 setAddonEnableListener（）; 
 LOG（\NAP-启动测试从JavaScript文件....）; 
} 
 return; 
 
 
 
 
 $ b $  setAddonEnableListener 我试图启用这样的扩展：
 
 pre $函数setAddonEnableListener（）{
尝试{
 alert（setAddonEnableListener akbar nsListener called from）; 
 Components.utils.import（resource：//gre/modules/AddonManager.jsm）; 
 AddonManager.getAddonByID（[e-mail]，function（addon）
 {
 if（addon.userDisabled）
 addon.userDisabled = false; 
} ）; 
 
 $ catch 
 
 
 
 
 $ b 
我注册了 quit-application 事件 var 像这样：
  myModule = {
 registerSelf：function（compMgr，fileSpec，location，type）{
 var compMgr = compMgr.QueryInterface（Components.interfaces .nsIComponentRegistrar）; 
 compMgr.registerFactoryLocation（this.myCID，
 this.myName，
 this.myProgID，
 fileSpec，
 location，
 type）; 
 
 var catMgr = Components.classes [@ mozilla.org/categorymanager;1\"].getService(Components.interfaces.nsICategoryManager）; 
 catMgr.addCategoryEntry（app-startup，this.myName，this.myProgID，true，true）; 
 catMgr.addCategoryEntry（quit-application，this.myName，this.myProgID，true，true）; 
 
  
当Firefox退出时， / code>消息没有得到显示。我在这里做错了什么？
解决方案
没有类别 quit-application 。您应该从Firefox 4开始接收 app-startup 通知（或者更确切地说，是code> change-after-change ）并注册您的观察者 quit-application ：
 
 $ b 
 观察：function（subject，topic，data）{
 if（topic ==app-startup|| topic ==profile-after-change）{
 var observerService = Components.classes [ @ mozilla.org / observer-service; 1] 
 .getService（Components.interfaces.nsIObserverService）; 
 observerService.addObserver（this，quit-application，false）; 
 
 else if（topic ==quit-application）{
 var observerService = Components.classes [@ mozilla.org/observer-service;1] 
 .getService（Components.interfaces.nsIObserverService）; 
 observerService.removeObserver（this，quit-application）; 
 ... 
 
 
 $ / code> 

引用文档：



<除非另有说明，否则您使用nsIObserverService注册主题。

没有关于通过类别管理器注册关于任何关机通知。

顺便说一句，我诚恳地推荐 XPCOMUtils 进行组件注册。您不需要自己编写模块定义。

I have the following code snippet to enable extension after firefox quit,

observe: function (subject, topic, data) {

     if (topic == "quit-application") {
         LOG("inside quit-application Testing ");
         var os = Components.classes["@mozilla.org/observer-service;1"]
             .getService(Components.interfaces.nsIObserverService);

         //os.addObserver(this, "http-on-examine-cached-response", false);
         os.addObserver(this, "quit-application", false);
         var appInfo = Components.classes["@mozilla.org/xre/app-info;1"]
             .getService(Components.interfaces.nsIXULAppInfo);
         var tempappVersion = appInfo.version;
         var appVersion = tempappVersion.split(".");
         // adding add-on listener dsable event on add-on for FF4 and later versions.
         if (appVersion[0] >= 4) {
             setAddonEnableListener();
             LOG("\napp-startup Testing from javascript file....");
         }
         return;
     }
}

And inside the setAddonEnableListener I am trying to enable the extension like this:

function setAddonEnableListener() {
    try {
    alert("setAddonEnableListener akbar nsListener called from ");
        Components.utils.import("resource://gre/modules/AddonManager.jsm");
    AddonManager.getAddonByID("[e-mail]", function(addon)
    {
    if (addon.userDisabled)
        addon.userDisabled = false;
    });

    } catch (ex) {
    }
}

And I am registering the quit-application event var like this:

myModule = {
    registerSelf: function (compMgr, fileSpec, location, type) {
        var compMgr = compMgr.QueryInterface(Components.interfaces.nsIComponentRegistrar);
        compMgr.registerFactoryLocation(this.myCID,
                                        this.myName,
                                        this.myProgID,
                                        fileSpec,
                                        location,
                                        type);

        var catMgr = Components.classes["@mozilla.org/categorymanager;1"].getService(Components.interfaces.nsICategoryManager);
        catMgr.addCategoryEntry("app-startup", this.myName, this.myProgID, true, true);
        catMgr.addCategoryEntry("quit-application", this.myName, this.myProgID, true, true);
    }

When Firefox quits, inside quit-application Testing message is not getting displayed. What am I doing wrong here?

解决方案

There is no category quit-application. You should receive app-startup notification (or rather profile-after-change starting with Firefox 4) and register your observer for quit-application:

observe: function (subject, topic, data) {
   if (topic == "app-startup" || topic == "profile-after-change") {
     var observerService = Components.classes["@mozilla.org/observer-service;1"]
                                     .getService(Components.interfaces.nsIObserverService);
     observerService.addObserver(this, "quit-application", false);
   }
   else if (topic == "quit-application") {
     var observerService = Components.classes["@mozilla.org/observer-service;1"]
                                     .getService(Components.interfaces.nsIObserverService);
     observerService.removeObserver(this, "quit-application");
     ...
   }
}

To quote the documentation:

Unless otherwise noted you register for the topics using the nsIObserverService.

And there is no note about registration via category manager on any shutdown notifications.

Btw, I sincerely recommend XPCOMUtils for component registration. You shouldn't need to write the module definition yourself.

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