apps/app_lifetime_monitor.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_lifetime_monitor.h"
   6
   7 #include "content/public/browser/browser_context.h"
   8 #include "content/public/browser/notification_details.h"
   9 #include "content/public/browser/notification_service.h"
  10 #include "extensions/browser/app_window/app_window.h"
  11 #include "extensions/browser/extension_host.h"
  12 #include "extensions/browser/notification_types.h"
  13 #include "extensions/common/extension.h"
  14
  15 namespace apps {
  16
  17 using extensions::AppWindow;
  18 using extensions::AppWindowRegistry;
  19 using extensions::Extension;
  20 using extensions::ExtensionHost;
  21
  22 AppLifetimeMonitor::AppLifetimeMonitor(content::BrowserContext* context)
  23     : context_(context) {
  24   registrar_.Add(this,
  25                  extensions::NOTIFICATION_EXTENSION_HOST_DID_STOP_FIRST_LOAD,
  26                  content::NotificationService::AllSources());
  27   registrar_.Add(this,
  28                  extensions::NOTIFICATION_EXTENSION_HOST_DESTROYED,
  29                  content::NotificationService::AllSources());
  30
  31   AppWindowRegistry* app_window_registry =
  32       AppWindowRegistry::Factory::GetForBrowserContext(context_,
  33                                                        false /* create */);
  34   DCHECK(app_window_registry);
  35   app_window_registry->AddObserver(this);
  36 }
  37
  38 AppLifetimeMonitor::~AppLifetimeMonitor() = default;
  39
  40 void AppLifetimeMonitor::AddObserver(Observer* observer) {
  41   observers_.AddObserver(observer);
  42 }
  43
  44 void AppLifetimeMonitor::RemoveObserver(Observer* observer) {
  45   observers_.RemoveObserver(observer);
  46 }
  47
  48 void AppLifetimeMonitor::Observe(int type,
  49                                 const content::NotificationSource& source,
  50                                 const content::NotificationDetails& details) {
  51   switch (type) {
  52     case extensions::NOTIFICATION_EXTENSION_HOST_DID_STOP_FIRST_LOAD: {
  53       ExtensionHost* host = content::Details<ExtensionHost>(details).ptr();
  54       const Extension* extension = host->extension();
  55       if (!extension || !extension->is_platform_app())
  56         return;
  57
  58       NotifyAppStart(extension->id());
  59       break;
  60     }
  61
  62     case extensions::NOTIFICATION_EXTENSION_HOST_DESTROYED: {
  63       ExtensionHost* host = content::Details<ExtensionHost>(details).ptr();
  64       const Extension* extension = host->extension();
  65       if (!extension || !extension->is_platform_app())
  66         return;
  67
  68       NotifyAppStop(extension->id());
  69       break;
  70     }
  71   }
  72 }
  73
  74 void AppLifetimeMonitor::OnAppWindowRemoved(AppWindow* app_window) {
  75   if (!HasOtherVisibleAppWindows(app_window))
  76     NotifyAppDeactivated(app_window->extension_id());
  77 }
  78
  79 void AppLifetimeMonitor::OnAppWindowHidden(AppWindow* app_window) {
  80   if (!HasOtherVisibleAppWindows(app_window))
  81     NotifyAppDeactivated(app_window->extension_id());
  82 }
  83
  84 void AppLifetimeMonitor::OnAppWindowShown(AppWindow* app_window,
  85                                           bool was_hidden) {
  86   if (app_window->window_type() != AppWindow::WINDOW_TYPE_DEFAULT)
  87     return;
  88
  89   // The app is being activated if this is the first window to become visible.
  90   if (was_hidden && !HasOtherVisibleAppWindows(app_window)) {
  91     NotifyAppActivated(app_window->extension_id());
  92   }
  93 }
  94
  95 void AppLifetimeMonitor::Shutdown() {
  96   AppWindowRegistry* app_window_registry =
  97       AppWindowRegistry::Factory::GetForBrowserContext(context_,
  98                                                        false /* create */);
  99   if (app_window_registry)
 100     app_window_registry->RemoveObserver(this);
 101 }
 102
 103 bool AppLifetimeMonitor::HasOtherVisibleAppWindows(
 104     AppWindow* app_window) const {
 105   AppWindowRegistry::AppWindowList windows =
 106       AppWindowRegistry::Get(app_window->browser_context())
 107           ->GetAppWindowsForApp(app_window->extension_id());
 108
 109   for (AppWindowRegistry::AppWindowList::const_iterator i = windows.begin();
 110        i != windows.end();
 111        ++i) {
 112     if (*i != app_window && !(*i)->is_hidden())
 113       return true;
 114   }
 115   return false;
 116 }
 117
 118 void AppLifetimeMonitor::NotifyAppStart(const std::string& app_id) {
 119   for (auto& observer : observers_)
 120     observer.OnAppStart(context_, app_id);
 121 }
 122
 123 void AppLifetimeMonitor::NotifyAppActivated(const std::string& app_id) {
 124   for (auto& observer : observers_)
 125     observer.OnAppActivated(context_, app_id);
 126 }
 127
 128 void AppLifetimeMonitor::NotifyAppDeactivated(const std::string& app_id) {
 129   for (auto& observer : observers_)
 130     observer.OnAppDeactivated(context_, app_id);
 131 }
 132
 133 void AppLifetimeMonitor::NotifyAppStop(const std::string& app_id) {
 134   for (auto& observer : observers_)
 135     observer.OnAppStop(context_, app_id);
 136 }
 137
 138 }  // namespace apps