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      1 // Copyright (c) 2012 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_restore_service.h"
      6 
      7 #include "apps/app_lifetime_monitor_factory.h"
      8 #include "apps/app_restore_service_factory.h"
      9 #include "apps/launcher.h"
     10 #include "apps/saved_files_service.h"
     11 #include "apps/shell_window.h"
     12 #include "chrome/browser/chrome_notification_types.h"
     13 #include "chrome/browser/extensions/api/app_runtime/app_runtime_api.h"
     14 #include "chrome/browser/extensions/extension_host.h"
     15 #include "chrome/browser/extensions/extension_prefs.h"
     16 #include "chrome/browser/extensions/extension_service.h"
     17 #include "chrome/browser/extensions/extension_system.h"
     18 #include "chrome/common/extensions/extension.h"
     19 #include "chrome/common/extensions/extension_set.h"
     20 
     21 #if defined(OS_WIN)
     22 #include "win8/util/win8_util.h"
     23 #endif
     24 
     25 using extensions::Extension;
     26 using extensions::ExtensionHost;
     27 using extensions::ExtensionPrefs;
     28 using extensions::ExtensionSystem;
     29 
     30 namespace apps {
     31 
     32 // static
     33 bool AppRestoreService::ShouldRestoreApps(bool is_browser_restart) {
     34   bool should_restore_apps = is_browser_restart;
     35 #if defined(OS_CHROMEOS)
     36   // Chromeos always restarts apps, even if it was a regular shutdown.
     37   should_restore_apps = true;
     38 #elif defined(OS_WIN)
     39   // Packaged apps are not supported in Metro mode, so don't try to start them.
     40   if (win8::IsSingleWindowMetroMode())
     41     should_restore_apps = false;
     42 #endif
     43   return should_restore_apps;
     44 }
     45 
     46 AppRestoreService::AppRestoreService(Profile* profile)
     47     : profile_(profile) {
     48   StartObservingAppLifetime();
     49 }
     50 
     51 void AppRestoreService::HandleStartup(bool should_restore_apps) {
     52   ExtensionService* extension_service =
     53       ExtensionSystem::Get(profile_)->extension_service();
     54   const ExtensionSet* extensions = extension_service->extensions();
     55   ExtensionPrefs* extension_prefs = extension_service->extension_prefs();
     56 
     57   for (ExtensionSet::const_iterator it = extensions->begin();
     58       it != extensions->end(); ++it) {
     59     const Extension* extension = it->get();
     60     if (extension_prefs->IsExtensionRunning(extension->id())) {
     61       RecordAppStop(extension->id());
     62       // If we are not restoring apps (e.g., because it is a clean restart), and
     63       // the app does not have retain permission, explicitly clear the retained
     64       // entries queue.
     65       if (should_restore_apps) {
     66         RestoreApp(it->get());
     67       } else {
     68         SavedFilesService::Get(profile_)->ClearQueueIfNoRetainPermission(
     69             extension);
     70       }
     71     }
     72   }
     73 }
     74 
     75 bool AppRestoreService::IsAppRestorable(const std::string& extension_id) {
     76   return extensions::ExtensionPrefs::Get(profile_) ->IsExtensionRunning(
     77       extension_id);
     78 }
     79 
     80 // static
     81 AppRestoreService* AppRestoreService::Get(Profile* profile) {
     82   return apps::AppRestoreServiceFactory::GetForProfile(profile);
     83 }
     84 
     85 void AppRestoreService::OnAppStart(Profile* profile,
     86                                    const std::string& app_id) {
     87   RecordAppStart(app_id);
     88 }
     89 
     90 void AppRestoreService::OnAppActivated(Profile* profile,
     91                                        const std::string& app_id) {
     92   RecordAppActiveState(app_id, true);
     93 }
     94 
     95 void AppRestoreService::OnAppDeactivated(Profile* profile,
     96                                          const std::string& app_id) {
     97   RecordAppActiveState(app_id, false);
     98 }
     99 
    100 void AppRestoreService::OnAppStop(Profile* profile, const std::string& app_id) {
    101   RecordAppStop(app_id);
    102 }
    103 
    104 void AppRestoreService::OnChromeTerminating() {
    105   // We want to preserve the state when the app begins terminating, so stop
    106   // listening to app lifetime events.
    107   StopObservingAppLifetime();
    108 }
    109 
    110 void AppRestoreService::Shutdown() {
    111   StopObservingAppLifetime();
    112 }
    113 
    114 void AppRestoreService::RecordAppStart(const std::string& extension_id) {
    115   ExtensionPrefs* extension_prefs =
    116       ExtensionSystem::Get(profile_)->extension_service()->extension_prefs();
    117   extension_prefs->SetExtensionRunning(extension_id, true);
    118 }
    119 
    120 void AppRestoreService::RecordAppStop(const std::string& extension_id) {
    121   ExtensionPrefs* extension_prefs =
    122       ExtensionSystem::Get(profile_)->extension_service()->extension_prefs();
    123   extension_prefs->SetExtensionRunning(extension_id, false);
    124 }
    125 
    126 void AppRestoreService::RecordAppActiveState(const std::string& id,
    127                                              bool is_active) {
    128   ExtensionService* extension_service =
    129       ExtensionSystem::Get(profile_)->extension_service();
    130   ExtensionPrefs* extension_prefs = extension_service->extension_prefs();
    131 
    132   // If the extension isn't running then we will already have recorded whether
    133   // it is active or not.
    134   if (!extension_prefs->IsExtensionRunning(id))
    135     return;
    136 
    137   extension_prefs->SetIsActive(id, is_active);
    138 }
    139 
    140 void AppRestoreService::RestoreApp(const Extension* extension) {
    141   RestartPlatformApp(profile_, extension);
    142 }
    143 
    144 void AppRestoreService::StartObservingAppLifetime() {
    145   AppLifetimeMonitor* app_lifetime_monitor =
    146       AppLifetimeMonitorFactory::GetForProfile(profile_);
    147   DCHECK(app_lifetime_monitor);
    148   app_lifetime_monitor->AddObserver(this);
    149 }
    150 
    151 void AppRestoreService::StopObservingAppLifetime() {
    152   AppLifetimeMonitor* app_lifetime_monitor =
    153       AppLifetimeMonitorFactory::GetForProfile(profile_);
    154   // This might be NULL in tests.
    155   if (app_lifetime_monitor)
    156     app_lifetime_monitor->RemoveObserver(this);
    157 }
    158 
    159 }  // namespace apps
    160