apps/app_lifetime_monitor.cc

   1 // Copyright 2013 The Chromium Authors
   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 "base/observer_list.h"
   8 #include "content/public/browser/browser_context.h"
   9 #include "extensions/browser/app_window/app_window.h"
  10 #include "extensions/browser/extension_host.h"
  11 #include "extensions/common/extension.h"
  12
  13 namespace apps {
  14
  15 using extensions::AppWindow;
  16 using extensions::AppWindowRegistry;
  17 using extensions::Extension;
  18 using extensions::ExtensionHost;
  19
  20 AppLifetimeMonitor::AppLifetimeMonitor(content::BrowserContext* context)
  21     : context_(context) {
  22   extension_host_registry_observation_.Observe(
  23       extensions::ExtensionHostRegistry::Get(context_));
  24
  25   AppWindowRegistry* app_window_registry =
  26       AppWindowRegistry::Factory::GetForBrowserContext(context_,
  27                                                        false /* create */);
  28   DCHECK(app_window_registry);
  29   app_window_registry->AddObserver(this);
  30 }
  31
  32 AppLifetimeMonitor::~AppLifetimeMonitor() = default;
  33
  34 void AppLifetimeMonitor::AddObserver(Observer* observer) {
  35   observers_.AddObserver(observer);
  36 }
  37
  38 void AppLifetimeMonitor::RemoveObserver(Observer* observer) {
  39   observers_.RemoveObserver(observer);
  40 }
  41
  42 void AppLifetimeMonitor::OnExtensionHostCompletedFirstLoad(
  43     content::BrowserContext* browser_context,
  44     ExtensionHost* host) {
  45   const Extension* extension = host->extension();
  46   if (!extension || !extension->is_platform_app())
  47     return;
  48
  49   NotifyAppStart(extension->id());
  50 }
  51
  52 void AppLifetimeMonitor::OnExtensionHostDestroyed(
  53     content::BrowserContext* browser_context,
  54     extensions::ExtensionHost* host) {
  55   const Extension* extension = host->extension();
  56   if (!extension || !extension->is_platform_app())
  57     return;
  58
  59   NotifyAppStop(extension->id());
  60 }
  61
  62 void AppLifetimeMonitor::OnAppWindowRemoved(AppWindow* app_window) {
  63   if (!HasOtherVisibleAppWindows(app_window))
  64     NotifyAppDeactivated(app_window->extension_id());
  65 }
  66
  67 void AppLifetimeMonitor::OnAppWindowHidden(AppWindow* app_window) {
  68   if (!HasOtherVisibleAppWindows(app_window))
  69     NotifyAppDeactivated(app_window->extension_id());
  70 }
  71
  72 void AppLifetimeMonitor::OnAppWindowShown(AppWindow* app_window,
  73                                           bool was_hidden) {
  74   if (app_window->window_type() != AppWindow::WINDOW_TYPE_DEFAULT)
  75     return;
  76
  77   // The app is being activated if this is the first window to become visible.
  78   if (was_hidden && !HasOtherVisibleAppWindows(app_window)) {
  79     NotifyAppActivated(app_window->extension_id());
  80   }
  81 }
  82
  83 void AppLifetimeMonitor::Shutdown() {
  84   AppWindowRegistry* app_window_registry =
  85       AppWindowRegistry::Factory::GetForBrowserContext(context_,
  86                                                        false /* create */);
  87   if (app_window_registry)
  88     app_window_registry->RemoveObserver(this);
  89 }
  90
  91 bool AppLifetimeMonitor::HasOtherVisibleAppWindows(
  92     AppWindow* app_window) const {
  93   AppWindowRegistry::AppWindowList windows =
  94       AppWindowRegistry::Get(app_window->browser_context())
  95           ->GetAppWindowsForApp(app_window->extension_id());
  96
  97   for (AppWindowRegistry::AppWindowList::const_iterator i = windows.begin();
  98        i != windows.end();
  99        ++i) {
 100     if (*i != app_window && !(*i)->is_hidden())
 101       return true;
 102   }
 103   return false;
 104 }
 105
 106 void AppLifetimeMonitor::NotifyAppStart(const std::string& app_id) {
 107   for (auto& observer : observers_)
 108     observer.OnAppStart(context_, app_id);
 109 }
 110
 111 void AppLifetimeMonitor::NotifyAppActivated(const std::string& app_id) {
 112   for (auto& observer : observers_)
 113     observer.OnAppActivated(context_, app_id);
 114 }
 115
 116 void AppLifetimeMonitor::NotifyAppDeactivated(const std::string& app_id) {
 117   for (auto& observer : observers_)
 118     observer.OnAppDeactivated(context_, app_id);
 119 }
 120
 121 void AppLifetimeMonitor::NotifyAppStop(const std::string& app_id) {
 122   for (auto& observer : observers_)
 123     observer.OnAppStop(context_, app_id);
 124 }
 125
 126 }  // namespace apps