src/apps/app_shim/app_shim_handler_mac.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "apps/app_shim/app_shim_handler_mac.h"
   6
   7 #include <map>
   8
   9 #include "apps/app_window_registry.h"
  10 #include "base/bind.h"
  11 #include "base/logging.h"
  12 #include "base/memory/singleton.h"
  13 #include "base/message_loop/message_loop.h"
  14 #include "chrome/browser/chrome_notification_types.h"
  15 #include "chrome/browser/lifetime/application_lifetime.h"
  16 #include "chrome/browser/ui/app_list/app_list_service.h"
  17 #include "content/public/browser/notification_observer.h"
  18 #include "content/public/browser/notification_registrar.h"
  19 #include "content/public/browser/notification_service.h"
  20
  21 namespace apps {
  22
  23 namespace {
  24
  25 void TerminateIfNoAppWindows() {
  26   bool app_windows_left =
  27       apps::AppWindowRegistry::IsAppWindowRegisteredInAnyProfile(0);
  28   if (!app_windows_left &&
  29       !AppListService::Get(chrome::HOST_DESKTOP_TYPE_NATIVE)
  30            ->IsAppListVisible()) {
  31     chrome::AttemptExit();
  32   }
  33 }
  34
  35 class AppShimHandlerRegistry : public content::NotificationObserver {
  36  public:
  37   static AppShimHandlerRegistry* GetInstance() {
  38     return Singleton<AppShimHandlerRegistry,
  39                      LeakySingletonTraits<AppShimHandlerRegistry> >::get();
  40   }
  41
  42   AppShimHandler* GetForAppMode(const std::string& app_mode_id) const {
  43     HandlerMap::const_iterator it = handlers_.find(app_mode_id);
  44     if (it != handlers_.end())
  45       return it->second;
  46
  47     return default_handler_;
  48   }
  49
  50   bool SetForAppMode(const std::string& app_mode_id, AppShimHandler* handler) {
  51     bool inserted_or_removed = handler ?
  52         handlers_.insert(HandlerMap::value_type(app_mode_id, handler)).second :
  53         handlers_.erase(app_mode_id) == 1;
  54     DCHECK(inserted_or_removed);
  55     return inserted_or_removed;
  56   }
  57
  58   void SetDefaultHandler(AppShimHandler* handler) {
  59     DCHECK_NE(default_handler_ == NULL, handler == NULL);
  60     default_handler_ = handler;
  61   }
  62
  63   void MaybeTerminate() {
  64     if (!browser_opened_ever_) {
  65       // Post this to give AppWindows a chance to remove themselves from the
  66       // registry.
  67       base::MessageLoop::current()->PostTask(
  68           FROM_HERE, base::Bind(&TerminateIfNoAppWindows));
  69     }
  70   }
  71
  72  private:
  73   friend struct DefaultSingletonTraits<AppShimHandlerRegistry>;
  74   typedef std::map<std::string, AppShimHandler*> HandlerMap;
  75
  76   AppShimHandlerRegistry()
  77       : default_handler_(NULL),
  78         browser_opened_ever_(false) {
  79     registrar_.Add(
  80         this, chrome::NOTIFICATION_BROWSER_OPENED,
  81         content::NotificationService::AllBrowserContextsAndSources());
  82   }
  83
  84   virtual ~AppShimHandlerRegistry() {}
  85
  86   // content::NotificationObserver override:
  87   virtual void Observe(
  88       int type,
  89       const content::NotificationSource& source,
  90       const content::NotificationDetails& details) OVERRIDE {
  91     DCHECK_EQ(chrome::NOTIFICATION_BROWSER_OPENED, type);
  92     registrar_.Remove(
  93         this, chrome::NOTIFICATION_BROWSER_OPENED,
  94         content::NotificationService::AllBrowserContextsAndSources());
  95     browser_opened_ever_ = true;
  96   }
  97
  98   HandlerMap handlers_;
  99   AppShimHandler* default_handler_;
 100   content::NotificationRegistrar registrar_;
 101   bool browser_opened_ever_;
 102
 103   DISALLOW_COPY_AND_ASSIGN(AppShimHandlerRegistry);
 104 };
 105
 106 }  // namespace
 107
 108 // static
 109 void AppShimHandler::RegisterHandler(const std::string& app_mode_id,
 110                                      AppShimHandler* handler) {
 111   DCHECK(handler);
 112   AppShimHandlerRegistry::GetInstance()->SetForAppMode(app_mode_id, handler);
 113 }
 114
 115 // static
 116 void AppShimHandler::RemoveHandler(const std::string& app_mode_id) {
 117   AppShimHandlerRegistry::GetInstance()->SetForAppMode(app_mode_id, NULL);
 118 }
 119
 120 // static
 121 AppShimHandler* AppShimHandler::GetForAppMode(const std::string& app_mode_id) {
 122   return AppShimHandlerRegistry::GetInstance()->GetForAppMode(app_mode_id);
 123 }
 124
 125 // static
 126 void AppShimHandler::SetDefaultHandler(AppShimHandler* handler) {
 127   AppShimHandlerRegistry::GetInstance()->SetDefaultHandler(handler);
 128 }
 129
 130 // static
 131 void AppShimHandler::MaybeTerminate() {
 132   AppShimHandlerRegistry::GetInstance()->MaybeTerminate();
 133 }
 134
 135 }  // namespace apps