root/apps/app_restore_service.cc

DEFINITIONS

1. ShouldRestoreApps
2. HandleStartup
3. IsAppRestorable
4. Get
5. OnAppStart
6. OnAppActivated
7. OnAppDeactivated
8. OnAppStop
9. OnChromeTerminating
10. Shutdown
11. RecordAppStart
12. RecordAppStop
13. RecordAppActiveState
14. RestoreApp
15. StartObservingAppLifetime
16. StopObservingAppLifetime

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "apps/app_restore_service.h"

#include "apps/app_lifetime_monitor_factory.h"
#include "apps/app_restore_service_factory.h"
#include "apps/app_window.h"
#include "apps/browser/api/app_runtime/app_runtime_api.h"
#include "apps/launcher.h"
#include "apps/saved_files_service.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/profiles/profile.h"
#include "extensions/browser/extension_host.h"
#include "extensions/browser/extension_prefs.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/common/extension.h"
#include "extensions/common/extension_set.h"

#if defined(OS_WIN)
#include "win8/util/win8_util.h"
#endif

using extensions::Extension;
using extensions::ExtensionHost;
using extensions::ExtensionPrefs;
using extensions::ExtensionRegistry;

namespace apps {

// static
bool AppRestoreService::ShouldRestoreApps(bool is_browser_restart) {
  bool should_restore_apps = is_browser_restart;
#if defined(OS_CHROMEOS)
  // Chromeos always restarts apps, even if it was a regular shutdown.
  should_restore_apps = true;
#elif defined(OS_WIN)
  // Packaged apps are not supported in Metro mode, so don't try to start them.
  if (win8::IsSingleWindowMetroMode())
    should_restore_apps = false;
#endif
  return should_restore_apps;
}

AppRestoreService::AppRestoreService(Profile* profile)
    : profile_(profile) {
  StartObservingAppLifetime();
}

void AppRestoreService::HandleStartup(bool should_restore_apps) {
  const extensions::ExtensionSet& extensions =
      ExtensionRegistry::Get(profile_)->enabled_extensions();
  ExtensionPrefs* extension_prefs = ExtensionPrefs::Get(profile_);

  for (extensions::ExtensionSet::const_iterator it = extensions.begin();
      it != extensions.end(); ++it) {
    const Extension* extension = it->get();
    if (extension_prefs->IsExtensionRunning(extension->id())) {
      RecordAppStop(extension->id());
      // If we are not restoring apps (e.g., because it is a clean restart), and
      // the app does not have retain permission, explicitly clear the retained
      // entries queue.
      if (should_restore_apps) {
        RestoreApp(it->get());
      } else {
        SavedFilesService::Get(profile_)->ClearQueueIfNoRetainPermission(
            extension);
      }
    }
  }
}

bool AppRestoreService::IsAppRestorable(const std::string& extension_id) {
  return ExtensionPrefs::Get(profile_)->IsExtensionRunning(extension_id);
}

// static
AppRestoreService* AppRestoreService::Get(Profile* profile) {
  return apps::AppRestoreServiceFactory::GetForProfile(profile);
}

void AppRestoreService::OnAppStart(Profile* profile,
                                   const std::string& app_id) {
  RecordAppStart(app_id);
}

void AppRestoreService::OnAppActivated(Profile* profile,
                                       const std::string& app_id) {
  RecordAppActiveState(app_id, true);
}

void AppRestoreService::OnAppDeactivated(Profile* profile,
                                         const std::string& app_id) {
  RecordAppActiveState(app_id, false);
}

void AppRestoreService::OnAppStop(Profile* profile, const std::string& app_id) {
  RecordAppStop(app_id);
}

void AppRestoreService::OnChromeTerminating() {
  // We want to preserve the state when the app begins terminating, so stop
  // listening to app lifetime events.
  StopObservingAppLifetime();
}

void AppRestoreService::Shutdown() {
  StopObservingAppLifetime();
}

void AppRestoreService::RecordAppStart(const std::string& extension_id) {
  ExtensionPrefs::Get(profile_)->SetExtensionRunning(extension_id, true);
}

void AppRestoreService::RecordAppStop(const std::string& extension_id) {
  ExtensionPrefs::Get(profile_)->SetExtensionRunning(extension_id, false);
}

void AppRestoreService::RecordAppActiveState(const std::string& id,
                                             bool is_active) {
  ExtensionPrefs* extension_prefs = ExtensionPrefs::Get(profile_);

  // If the extension isn't running then we will already have recorded whether
  // it is active or not.
  if (!extension_prefs->IsExtensionRunning(id))
    return;

  extension_prefs->SetIsActive(id, is_active);
}

void AppRestoreService::RestoreApp(const Extension* extension) {
  RestartPlatformApp(profile_, extension);
}

void AppRestoreService::StartObservingAppLifetime() {
  AppLifetimeMonitor* app_lifetime_monitor =
      AppLifetimeMonitorFactory::GetForProfile(profile_);
  DCHECK(app_lifetime_monitor);
  app_lifetime_monitor->AddObserver(this);
}

void AppRestoreService::StopObservingAppLifetime() {
  AppLifetimeMonitor* app_lifetime_monitor =
      AppLifetimeMonitorFactory::GetForProfile(profile_);
  // This might be NULL in tests.
  if (app_lifetime_monitor)
    app_lifetime_monitor->RemoveObserver(this);
}

}  // namespace apps