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