root/chrome/browser/ui/ash/launcher/chrome_launcher_controller.cc

DEFINITIONS

1. GetPrefKeyForRootWindow
2. UpdatePerDisplayPref
3. GetPrefForRootWindow
4. MaybePropagatePrefToLocal
5. GetSourceFromAppListSource
6. UserAddedToSession
7. AddUser
8. ignore_persist_pinned_state_change_
9. CreateInstance
10. Init
11. CreateAppLauncherItem
12. SetItemStatus
13. SetItemController
14. CloseLauncherItem
15. Pin
16. Unpin
17. IsPinned
18. TogglePinned
19. IsPinnable
20. LockV1AppWithID
21. UnlockV1AppWithID
22. Close
23. IsOpen
24. IsPlatformApp
25. LaunchApp
26. ActivateApp
27. GetLaunchType
28. GetShelfIDForAppID
29. GetAppIDForShelfID
30. SetAppImage
31. OnAutoHideBehaviorChanged
32. SetLauncherItemImage
33. CanPin
34. IsAppPinned
35. IsWindowedAppInLauncher
36. PinAppWithID
37. SetLaunchType
38. UnpinAppWithID
39. IsLoggedInAsGuest
40. CreateNewWindow
41. CreateNewIncognitoWindow
42. PersistPinnedState
43. model
44. profile
45. GetShelfAutoHideBehavior
46. CanUserModifyShelfAutoHideBehavior
47. ToggleShelfAutoHideBehavior
48. UpdateAppState
49. GetShelfIDForWebContents
50. SetRefocusURLPatternForTest
51. GetExtensionForAppID
52. ActivateWindowOrMinimizeIfActive
53. OnShelfCreated
54. OnShelfDestroyed
55. ShelfItemAdded
56. ShelfItemRemoved
57. ShelfItemMoved
58. ShelfItemChanged
59. ShelfStatusChanged
60. ActiveUserChanged
61. AdditionalUserAddedToSession
62. Observe
63. OnShelfAlignmentChanged
64. OnDisplayConfigurationChanged
65. OnIsSyncingChanged
66. OnAppSyncUIStatusChanged
67. ExtensionEnableFlowFinished
68. ExtensionEnableFlowAborted
69. GetApplicationList
70. GetV1ApplicationsFromAppId
71. ActivateShellApp
72. IsWebContentHandledByApplication
73. ContentCanBeHandledByGmailApp
74. GetAppListIcon
75. GetAppListTitle
76. CreateAppShortcutLauncherItem
77. SetAppTabHelperForTest
78. SetAppIconLoaderForTest
79. GetAppIdFromShelfIdForTest
80. SetShelfItemDelegateManagerForTest
81. RememberUnpinnedRunningApplicationOrder
82. RestoreUnpinnedRunningApplicationOrder
83. CreateAppShortcutLauncherItemWithType
84. GetLauncherItemController
85. IsBrowserFromActiveUser
86. LauncherItemClosed
87. DoPinAppWithID
88. DoUnpinAppWithID
89. PinRunningAppInternal
90. UnpinRunningAppInternal
91. UpdateAppLaunchersFromPref
92. SetShelfAutoHideBehaviorPrefs
93. SetShelfAutoHideBehaviorFromPrefs
94. SetShelfAlignmentFromPrefs
95. SetShelfBehaviorsFromPrefs
96. GetAppState
97. InsertAppLauncherItem
98. HasItemController
99. GetV1ApplicationsFromController
100. GetBrowserShortcutLauncherItemController
101. CreateBrowserShortcutLauncherItem
102. PersistChromeItemIndex
103. GetChromeIconIndexFromPref
104. MoveChromeOrApplistToFinalPosition
105. FindInsertionPoint
106. GetChromeIconIndexForCreation
107. GetListOfPinnedAppsAndBrowser
108. IsIncognito
109. CloseWindowedAppsFromRemovedExtension
110. SetShelfItemDelegate
111. AttachProfile
112. ReleaseProfile

// Copyright 2013 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 "chrome/browser/ui/ash/launcher/chrome_launcher_controller.h"

#include <vector>

#include "ash/ash_switches.h"
#include "ash/desktop_background/desktop_background_controller.h"
#include "ash/multi_profile_uma.h"
#include "ash/root_window_controller.h"
#include "ash/shelf/shelf.h"
#include "ash/shelf/shelf_item_delegate_manager.h"
#include "ash/shelf/shelf_layout_manager.h"
#include "ash/shelf/shelf_model.h"
#include "ash/shelf/shelf_widget.h"
#include "ash/shell.h"
#include "ash/system/tray/system_tray_delegate.h"
#include "ash/wm/window_util.h"
#include "base/command_line.h"
#include "base/prefs/scoped_user_pref_update.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "chrome/browser/app_mode/app_mode_utils.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/defaults.h"
#include "chrome/browser/extensions/app_icon_loader_impl.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/browser/extensions/extension_util.h"
#include "chrome/browser/extensions/launch_util.h"
#include "chrome/browser/favicon/favicon_tab_helper.h"
#include "chrome/browser/prefs/incognito_mode_prefs.h"
#include "chrome/browser/prefs/pref_service_syncable.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/profiles/profile_manager.h"
#include "chrome/browser/ui/ash/app_sync_ui_state.h"
#include "chrome/browser/ui/ash/chrome_launcher_prefs.h"
#include "chrome/browser/ui/ash/launcher/app_shortcut_launcher_item_controller.h"
#include "chrome/browser/ui/ash/launcher/app_window_launcher_controller.h"
#include "chrome/browser/ui/ash/launcher/app_window_launcher_item_controller.h"
#include "chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.h"
#include "chrome/browser/ui/ash/launcher/browser_status_monitor.h"
#include "chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item.h"
#include "chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_browser.h"
#include "chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_tab.h"
#include "chrome/browser/ui/ash/launcher/chrome_launcher_types.h"
#include "chrome/browser/ui/ash/launcher/launcher_app_tab_helper.h"
#include "chrome/browser/ui/ash/launcher/launcher_item_controller.h"
#include "chrome/browser/ui/ash/multi_user/multi_user_util.h"
#include "chrome/browser/ui/ash/multi_user/multi_user_window_manager.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_commands.h"
#include "chrome/browser/ui/browser_finder.h"
#include "chrome/browser/ui/browser_list.h"
#include "chrome/browser/ui/browser_tabstrip.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/browser/ui/extensions/application_launch.h"
#include "chrome/browser/ui/extensions/extension_enable_flow.h"
#include "chrome/browser/ui/host_desktop.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/browser/web_applications/web_app.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/extensions/manifest_handlers/app_launch_info.h"
#include "chrome/common/extensions/manifest_handlers/icons_handler.h"
#include "chrome/common/pref_names.h"
#include "chrome/common/url_constants.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/notification_registrar.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/web_contents.h"
#include "extensions/browser/extension_prefs.h"
#include "extensions/browser/extension_system.h"
#include "extensions/common/extension.h"
#include "extensions/common/extension_resource.h"
#include "extensions/common/url_pattern.h"
#include "grit/ash_resources.h"
#include "grit/chromium_strings.h"
#include "grit/generated_resources.h"
#include "grit/theme_resources.h"
#include "grit/ui_resources.h"
#include "net/base/url_util.h"
#include "ui/aura/window.h"
#include "ui/aura/window_event_dispatcher.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/wm/core/window_animations.h"

#if defined(OS_CHROMEOS)
#include "chrome/browser/browser_process.h"
#include "chrome/browser/chromeos/login/user_manager.h"
#include "chrome/browser/ui/ash/chrome_shell_delegate.h"
#include "chrome/browser/ui/ash/launcher/multi_profile_app_window_launcher_controller.h"
#include "chrome/browser/ui/ash/launcher/multi_profile_browser_status_monitor.h"
#endif

using extensions::Extension;
using extensions::UnloadedExtensionInfo;
using extension_misc::kGmailAppId;
using content::WebContents;

// static
ChromeLauncherController* ChromeLauncherController::instance_ = NULL;

namespace {

// This will be used as placeholder in the list of the pinned applciatons.
// Note that this is NOT a valid extension identifier so that pre M31 versions
// will ignore it.
const char kAppShelfIdPlaceholder[] = "AppShelfIDPlaceholder--------";

std::string GetPrefKeyForRootWindow(aura::Window* root_window) {
  gfx::Display display = gfx::Screen::GetScreenFor(
      root_window)->GetDisplayNearestWindow(root_window);
  DCHECK(display.is_valid());

  return base::Int64ToString(display.id());
}

void UpdatePerDisplayPref(PrefService* pref_service,
                          aura::Window* root_window,
                          const char* pref_key,
                          const std::string& value) {
  std::string key = GetPrefKeyForRootWindow(root_window);
  if (key.empty())
    return;

  DictionaryPrefUpdate update(pref_service, prefs::kShelfPreferences);
  base::DictionaryValue* shelf_prefs = update.Get();
  base::DictionaryValue* prefs = NULL;
  if (!shelf_prefs->GetDictionary(key, &prefs)) {
    prefs = new base::DictionaryValue();
    shelf_prefs->Set(key, prefs);
  }
  prefs->SetStringWithoutPathExpansion(pref_key, value);
}

// Returns a pref value in |pref_service| for the display of |root_window|. The
// pref value is stored in |local_path| and |path|, but |pref_service| may have
// per-display preferences and the value can be specified by policy. Here is
// the priority:
//  * A value managed by policy. This is a single value that applies to all
//    displays.
//  * A user-set value for the specified display.
//  * A user-set value in |local_path| or |path|, if no per-display settings are
//    ever specified (see http://crbug.com/173719 for why). |local_path| is
//    preferred. See comment in |kShelfAlignment| as to why we consider two
//    prefs and why |local_path| is preferred.
//  * A value recommended by policy. This is a single value that applies to all
//    root windows.
//  * The default value for |local_path| if the value is not recommended by
//    policy.
std::string GetPrefForRootWindow(PrefService* pref_service,
                                 aura::Window* root_window,
                                 const char* local_path,
                                 const char* path) {
  const PrefService::Preference* local_pref =
      pref_service->FindPreference(local_path);
  const std::string value(pref_service->GetString(local_path));
  if (local_pref->IsManaged())
    return value;

  std::string pref_key = GetPrefKeyForRootWindow(root_window);
  bool has_per_display_prefs = false;
  if (!pref_key.empty()) {
    const base::DictionaryValue* shelf_prefs = pref_service->GetDictionary(
        prefs::kShelfPreferences);
    const base::DictionaryValue* display_pref = NULL;
    std::string per_display_value;
    if (shelf_prefs->GetDictionary(pref_key, &display_pref) &&
        display_pref->GetString(path, &per_display_value))
      return per_display_value;

    // If the pref for the specified display is not found, scan the whole prefs
    // and check if the prefs for other display is already specified.
    std::string unused_value;
    for (base::DictionaryValue::Iterator iter(*shelf_prefs);
         !iter.IsAtEnd(); iter.Advance()) {
      const base::DictionaryValue* display_pref = NULL;
      if (iter.value().GetAsDictionary(&display_pref) &&
          display_pref->GetString(path, &unused_value)) {
        has_per_display_prefs = true;
        break;
      }
    }
  }

  if (local_pref->IsRecommended() || !has_per_display_prefs)
    return value;

  const base::Value* default_value =
      pref_service->GetDefaultPrefValue(local_path);
  std::string default_string;
  default_value->GetAsString(&default_string);
  return default_string;
}

// If prefs have synced and no user-set value exists at |local_path|, the value
// from |synced_path| is copied to |local_path|.
void MaybePropagatePrefToLocal(PrefServiceSyncable* pref_service,
                               const char* local_path,
                               const char* synced_path) {
  if (!pref_service->FindPreference(local_path)->HasUserSetting() &&
      pref_service->IsSyncing()) {
    // First time the user is using this machine, propagate from remote to
    // local.
    pref_service->SetString(local_path, pref_service->GetString(synced_path));
  }
}

std::string GetSourceFromAppListSource(ash::LaunchSource source) {
  switch (source) {
    case ash::LAUNCH_FROM_APP_LIST:
      return std::string(extension_urls::kLaunchSourceAppList);
    case ash::LAUNCH_FROM_APP_LIST_SEARCH:
      return std::string(extension_urls::kLaunchSourceAppListSearch);
    default: return std::string();
  }
}

}  // namespace

#if defined(OS_CHROMEOS)
// A class to get events from ChromeOS when a user gets changed or added.
class ChromeLauncherControllerUserSwitchObserverChromeOS
    : public ChromeLauncherControllerUserSwitchObserver,
      public chromeos::UserManager::UserSessionStateObserver,
      content::NotificationObserver {
 public:
  ChromeLauncherControllerUserSwitchObserverChromeOS(
      ChromeLauncherController* controller)
      : controller_(controller) {
    DCHECK(chromeos::UserManager::IsInitialized());
    chromeos::UserManager::Get()->AddSessionStateObserver(this);
    // A UserAddedToSession notification can be sent before a profile is loaded.
    // Since our observers require that we have already a profile, we might have
    // to postpone the notification until the ProfileManager lets us know that
    // the profile for that newly added user was added to the ProfileManager.
    registrar_.Add(this, chrome::NOTIFICATION_PROFILE_ADDED,
                   content::NotificationService::AllSources());
  }
  virtual ~ChromeLauncherControllerUserSwitchObserverChromeOS() {
    chromeos::UserManager::Get()->RemoveSessionStateObserver(this);
  }

  // chromeos::UserManager::UserSessionStateObserver overrides:
  virtual void UserAddedToSession(const chromeos::User* added_user) OVERRIDE;

  // content::NotificationObserver overrides:
  virtual void Observe(int type,
               const content::NotificationSource& source,
               const content::NotificationDetails& details) OVERRIDE;

 private:
  // Add a user to the session.
  void AddUser(Profile* profile);

  // The owning ChromeLauncherController.
  ChromeLauncherController* controller_;

  // The notification registrar to track the Profile creations after a user got
  // added to the session (if required).
  content::NotificationRegistrar registrar_;

  // Users which were just added to the system, but which profiles were not yet
  // (fully) loaded.
  std::set<std::string> added_user_ids_waiting_for_profiles_;

  DISALLOW_COPY_AND_ASSIGN(ChromeLauncherControllerUserSwitchObserverChromeOS);
};

void ChromeLauncherControllerUserSwitchObserverChromeOS::UserAddedToSession(
    const chromeos::User* active_user) {
  Profile* profile = multi_user_util::GetProfileFromUserID(
      active_user->email());
  // If we do not have a profile yet, we postpone forwarding the notification
  // until it is loaded.
  if (!profile)
    added_user_ids_waiting_for_profiles_.insert(active_user->email());
  else
    AddUser(profile);
}

void ChromeLauncherControllerUserSwitchObserverChromeOS::Observe(
    int type,
    const content::NotificationSource& source,
    const content::NotificationDetails& details) {
  if (type == chrome::NOTIFICATION_PROFILE_ADDED &&
      !added_user_ids_waiting_for_profiles_.empty()) {
    // Check if the profile is from a user which was on the waiting list.
    Profile* profile = content::Source<Profile>(source).ptr();
    std::string user_id = multi_user_util::GetUserIDFromProfile(profile);
    std::set<std::string>::iterator it = std::find(
        added_user_ids_waiting_for_profiles_.begin(),
        added_user_ids_waiting_for_profiles_.end(),
        user_id);
    if (it != added_user_ids_waiting_for_profiles_.end()) {
      added_user_ids_waiting_for_profiles_.erase(it);
      AddUser(profile->GetOriginalProfile());
    }
  }
}

void ChromeLauncherControllerUserSwitchObserverChromeOS::AddUser(
    Profile* profile) {
  if (chrome::MultiUserWindowManager::GetMultiProfileMode() ==
          chrome::MultiUserWindowManager::MULTI_PROFILE_MODE_SEPARATED)
    chrome::MultiUserWindowManager::GetInstance()->AddUser(profile);
  controller_->AdditionalUserAddedToSession(profile->GetOriginalProfile());
}
#endif

ChromeLauncherController::ChromeLauncherController(Profile* profile,
                                                   ash::ShelfModel* model)
    : model_(model),
      item_delegate_manager_(NULL),
      profile_(profile),
      app_sync_ui_state_(NULL),
      ignore_persist_pinned_state_change_(false) {
  if (!profile_) {
    // If no profile was passed, we take the currently active profile and use it
    // as the owner of the current desktop.
    // Use the original profile as on chromeos we may get a temporary off the
    // record profile, unless in guest session (where off the record profile is
    // the right one).
    Profile* active_profile = ProfileManager::GetActiveUserProfile();
    profile_ = active_profile->IsGuestSession() ? active_profile :
        active_profile->GetOriginalProfile();

    app_sync_ui_state_ = AppSyncUIState::Get(profile_);
    if (app_sync_ui_state_)
      app_sync_ui_state_->AddObserver(this);
  }

  // All profile relevant settings get bound to the current profile.
  AttachProfile(profile_);
  model_->AddObserver(this);

  // In multi profile mode we might have a window manager. We try to create it
  // here. If the instantiation fails, the manager is not needed.
  chrome::MultiUserWindowManager::CreateInstance();

#if defined(OS_CHROMEOS)
  // On Chrome OS using multi profile we want to switch the content of the shelf
  // with a user change. Note that for unit tests the instance can be NULL.
  if (chrome::MultiUserWindowManager::GetMultiProfileMode() !=
          chrome::MultiUserWindowManager::MULTI_PROFILE_MODE_OFF) {
    user_switch_observer_.reset(
        new ChromeLauncherControllerUserSwitchObserverChromeOS(this));
  }

  // Create our v1/v2 application / browser monitors which will inform the
  // launcher of status changes.
  if (chrome::MultiUserWindowManager::GetMultiProfileMode() ==
          chrome::MultiUserWindowManager::MULTI_PROFILE_MODE_SEPARATED) {
    // If running in separated destkop mode, we create the multi profile version
    // of status monitor.
    browser_status_monitor_.reset(new MultiProfileBrowserStatusMonitor(this));
    app_window_controller_.reset(
        new MultiProfileAppWindowLauncherController(this));
  } else {
    // Create our v1/v2 application / browser monitors which will inform the
    // launcher of status changes.
    browser_status_monitor_.reset(new BrowserStatusMonitor(this));
    app_window_controller_.reset(new AppWindowLauncherController(this));
  }
#else
  // Create our v1/v2 application / browser monitors which will inform the
  // launcher of status changes.
  browser_status_monitor_.reset(new BrowserStatusMonitor(this));
  app_window_controller_.reset(new AppWindowLauncherController(this));
#endif

  // Right now ash::Shell isn't created for tests.
  // TODO(mukai): Allows it to observe display change and write tests.
  if (ash::Shell::HasInstance()) {
    ash::Shell::GetInstance()->display_controller()->AddObserver(this);
    item_delegate_manager_ =
        ash::Shell::GetInstance()->shelf_item_delegate_manager();
  }

  notification_registrar_.Add(
      this,
      chrome::NOTIFICATION_EXTENSION_LOADED,
      content::Source<Profile>(profile_));
  notification_registrar_.Add(
      this,
      chrome::NOTIFICATION_EXTENSION_UNLOADED_DEPRECATED,
      content::Source<Profile>(profile_));
}

ChromeLauncherController::~ChromeLauncherController() {
  // Reset the BrowserStatusMonitor as it has a weak pointer to this.
  browser_status_monitor_.reset();

  // Reset the app window controller here since it has a weak pointer to this.
  app_window_controller_.reset();

  for (std::set<ash::Shelf*>::iterator iter = shelves_.begin();
       iter != shelves_.end();
       ++iter)
    (*iter)->shelf_widget()->shelf_layout_manager()->RemoveObserver(this);

  model_->RemoveObserver(this);
  if (ash::Shell::HasInstance())
    ash::Shell::GetInstance()->display_controller()->RemoveObserver(this);
  for (IDToItemControllerMap::iterator i = id_to_item_controller_map_.begin();
       i != id_to_item_controller_map_.end(); ++i) {
    int index = model_->ItemIndexByID(i->first);
    // A "browser proxy" is not known to the model and this removal does
    // therefore not need to be propagated to the model.
    if (index != -1 &&
        model_->items()[index].type != ash::TYPE_BROWSER_SHORTCUT)
      model_->RemoveItemAt(index);
  }

  if (ash::Shell::HasInstance())
    ash::Shell::GetInstance()->RemoveShellObserver(this);

  // Release all profile dependent resources.
  ReleaseProfile();
  if (instance_ == this)
    instance_ = NULL;

  // Get rid of the multi user window manager instance.
  chrome::MultiUserWindowManager::DeleteInstance();
}

// static
ChromeLauncherController* ChromeLauncherController::CreateInstance(
    Profile* profile,
    ash::ShelfModel* model) {
  // We do not check here for re-creation of the ChromeLauncherController since
  // it appears that it might be intentional that the ChromeLauncherController
  // can be re-created.
  instance_ = new ChromeLauncherController(profile, model);
  return instance_;
}

void ChromeLauncherController::Init() {
  CreateBrowserShortcutLauncherItem();
  UpdateAppLaunchersFromPref();

  // TODO(sky): update unit test so that this test isn't necessary.
  if (ash::Shell::HasInstance()) {
    SetShelfAutoHideBehaviorFromPrefs();
    SetShelfAlignmentFromPrefs();
    PrefServiceSyncable* prefs = PrefServiceSyncable::FromProfile(profile_);
    if (!prefs->FindPreference(prefs::kShelfAlignmentLocal)->HasUserSetting() ||
        !prefs->FindPreference(prefs::kShelfAutoHideBehaviorLocal)->
            HasUserSetting()) {
      // This causes OnIsSyncingChanged to be called when the value of
      // PrefService::IsSyncing() changes.
      prefs->AddObserver(this);
    }
    ash::Shell::GetInstance()->AddShellObserver(this);
  }
}

ash::ShelfID ChromeLauncherController::CreateAppLauncherItem(
    LauncherItemController* controller,
    const std::string& app_id,
    ash::ShelfItemStatus status) {
  CHECK(controller);
  int index = 0;
  // Panels are inserted on the left so as not to push all existing panels over.
  if (controller->GetShelfItemType() != ash::TYPE_APP_PANEL)
    index = model_->item_count();
  return InsertAppLauncherItem(controller,
                               app_id,
                               status,
                               index,
                               controller->GetShelfItemType());
}

void ChromeLauncherController::SetItemStatus(ash::ShelfID id,
                                             ash::ShelfItemStatus status) {
  int index = model_->ItemIndexByID(id);
  ash::ShelfItemStatus old_status = model_->items()[index].status;
  // Since ordinary browser windows are not registered, we might get a negative
  // index here.
  if (index >= 0 && old_status != status) {
    ash::ShelfItem item = model_->items()[index];
    item.status = status;
    model_->Set(index, item);
  }
}

void ChromeLauncherController::SetItemController(
    ash::ShelfID id,
    LauncherItemController* controller) {
  CHECK(controller);
  IDToItemControllerMap::iterator iter = id_to_item_controller_map_.find(id);
  CHECK(iter != id_to_item_controller_map_.end());
  controller->set_shelf_id(id);
  iter->second = controller;
  // Existing controller is destroyed and replaced by registering again.
  SetShelfItemDelegate(id, controller);
}

void ChromeLauncherController::CloseLauncherItem(ash::ShelfID id) {
  CHECK(id);
  if (IsPinned(id)) {
    // Create a new shortcut controller.
    IDToItemControllerMap::iterator iter = id_to_item_controller_map_.find(id);
    CHECK(iter != id_to_item_controller_map_.end());
    SetItemStatus(id, ash::STATUS_CLOSED);
    std::string app_id = iter->second->app_id();
    iter->second = new AppShortcutLauncherItemController(app_id, this);
    iter->second->set_shelf_id(id);
    // Existing controller is destroyed and replaced by registering again.
    SetShelfItemDelegate(id, iter->second);
  } else {
    LauncherItemClosed(id);
  }
}

void ChromeLauncherController::Pin(ash::ShelfID id) {
  DCHECK(HasItemController(id));

  int index = model_->ItemIndexByID(id);
  DCHECK_GE(index, 0);

  ash::ShelfItem item = model_->items()[index];

  if (item.type == ash::TYPE_PLATFORM_APP ||
      item.type == ash::TYPE_WINDOWED_APP) {
    item.type = ash::TYPE_APP_SHORTCUT;
    model_->Set(index, item);
  } else if (item.type != ash::TYPE_APP_SHORTCUT) {
    return;
  }

  if (CanPin())
    PersistPinnedState();
}

void ChromeLauncherController::Unpin(ash::ShelfID id) {
  DCHECK(HasItemController(id));

  LauncherItemController* controller = id_to_item_controller_map_[id];
  if (controller->type() == LauncherItemController::TYPE_APP ||
      controller->locked()) {
    UnpinRunningAppInternal(model_->ItemIndexByID(id));
  } else {
    LauncherItemClosed(id);
  }
  if (CanPin())
    PersistPinnedState();
}

bool ChromeLauncherController::IsPinned(ash::ShelfID id) {
  int index = model_->ItemIndexByID(id);
  if (index < 0)
    return false;
  ash::ShelfItemType type = model_->items()[index].type;
  return (type == ash::TYPE_APP_SHORTCUT || type == ash::TYPE_BROWSER_SHORTCUT);
}

void ChromeLauncherController::TogglePinned(ash::ShelfID id) {
  if (!HasItemController(id))
    return;  // May happen if item closed with menu open.

  if (IsPinned(id))
    Unpin(id);
  else
    Pin(id);
}

bool ChromeLauncherController::IsPinnable(ash::ShelfID id) const {
  int index = model_->ItemIndexByID(id);
  if (index == -1)
    return false;

  ash::ShelfItemType type = model_->items()[index].type;
  return ((type == ash::TYPE_APP_SHORTCUT ||
           type == ash::TYPE_PLATFORM_APP ||
           type == ash::TYPE_WINDOWED_APP) &&
          CanPin());
}

void ChromeLauncherController::LockV1AppWithID(
    const std::string& app_id) {
  ash::ShelfID id = GetShelfIDForAppID(app_id);
  if (!IsPinned(id) && !IsWindowedAppInLauncher(app_id)) {
    CreateAppShortcutLauncherItemWithType(app_id,
                                          model_->item_count(),
                                          ash::TYPE_WINDOWED_APP);
    id = GetShelfIDForAppID(app_id);
  }
  CHECK(id);
  id_to_item_controller_map_[id]->lock();
}

void ChromeLauncherController::UnlockV1AppWithID(const std::string& app_id) {
  ash::ShelfID id = GetShelfIDForAppID(app_id);
  CHECK(IsPinned(id) || IsWindowedAppInLauncher(app_id));
  CHECK(id);
  LauncherItemController* controller = id_to_item_controller_map_[id];
  controller->unlock();
  if (!controller->locked() && !IsPinned(id))
    CloseLauncherItem(id);
}

void ChromeLauncherController::Launch(ash::ShelfID id, int event_flags) {
  if (!HasItemController(id))
    return;  // In case invoked from menu and item closed while menu up.
  id_to_item_controller_map_[id]->Launch(ash::LAUNCH_FROM_UNKNOWN, event_flags);
}

void ChromeLauncherController::Close(ash::ShelfID id) {
  if (!HasItemController(id))
    return;  // May happen if menu closed.
  id_to_item_controller_map_[id]->Close();
}

bool ChromeLauncherController::IsOpen(ash::ShelfID id) {
  if (!HasItemController(id))
    return false;
  return id_to_item_controller_map_[id]->IsOpen();
}

bool ChromeLauncherController::IsPlatformApp(ash::ShelfID id) {
  if (!HasItemController(id))
    return false;

  std::string app_id = GetAppIDForShelfID(id);
  const Extension* extension = GetExtensionForAppID(app_id);
  // An extension can be synced / updated at any time and therefore not be
  // available.
  return extension ? extension->is_platform_app() : false;
}

void ChromeLauncherController::LaunchApp(const std::string& app_id,
                                         ash::LaunchSource source,
                                         int event_flags) {
  // |extension| could be NULL when it is being unloaded for updating.
  const Extension* extension = GetExtensionForAppID(app_id);
  if (!extension)
    return;

  if (!extensions::util::IsAppLaunchableWithoutEnabling(app_id, profile_)) {
    // Do nothing if there is already a running enable flow.
    if (extension_enable_flow_)
      return;

    extension_enable_flow_.reset(
        new ExtensionEnableFlow(profile_, app_id, this));
    extension_enable_flow_->StartForNativeWindow(NULL);
    return;
  }

  if (LaunchedInNativeDesktop(app_id))
    return;

  // The app will be created for the currently active profile.
  AppLaunchParams params(profile_,
                         extension,
                         event_flags,
                         chrome::HOST_DESKTOP_TYPE_ASH);
  if (source != ash::LAUNCH_FROM_UNKNOWN &&
      app_id == extension_misc::kWebStoreAppId) {
    // Get the corresponding source string.
    std::string source_value = GetSourceFromAppListSource(source);

    // Set an override URL to include the source.
    GURL extension_url = extensions::AppLaunchInfo::GetFullLaunchURL(extension);
    params.override_url = net::AppendQueryParameter(
        extension_url, extension_urls::kWebstoreSourceField, source_value);
  }

  OpenApplication(params);
}

void ChromeLauncherController::ActivateApp(const std::string& app_id,
                                           ash::LaunchSource source,
                                           int event_flags) {
  // If there is an existing non-shortcut controller for this app, open it.
  ash::ShelfID id = GetShelfIDForAppID(app_id);
  if (id) {
    LauncherItemController* controller = id_to_item_controller_map_[id];
    controller->Activate(source);
    return;
  }

  // Create a temporary application launcher item and use it to see if there are
  // running instances.
  scoped_ptr<AppShortcutLauncherItemController> app_controller(
      new AppShortcutLauncherItemController(app_id, this));
  if (!app_controller->GetRunningApplications().empty())
    app_controller->Activate(source);
  else
    LaunchApp(app_id, source, event_flags);
}

extensions::LaunchType ChromeLauncherController::GetLaunchType(
    ash::ShelfID id) {
  DCHECK(HasItemController(id));

  const Extension* extension = GetExtensionForAppID(
      id_to_item_controller_map_[id]->app_id());

  // An extension can be unloaded/updated/unavailable at any time.
  if (!extension)
    return extensions::LAUNCH_TYPE_DEFAULT;

  return extensions::GetLaunchType(extensions::ExtensionPrefs::Get(profile_),
                                   extension);
}

ash::ShelfID ChromeLauncherController::GetShelfIDForAppID(
    const std::string& app_id) {
  for (IDToItemControllerMap::const_iterator i =
           id_to_item_controller_map_.begin();
       i != id_to_item_controller_map_.end(); ++i) {
    if (i->second->type() == LauncherItemController::TYPE_APP_PANEL)
      continue;  // Don't include panels
    if (i->second->app_id() == app_id)
      return i->first;
  }
  return 0;
}

const std::string& ChromeLauncherController::GetAppIDForShelfID(
    ash::ShelfID id) {
  CHECK(HasItemController(id));
  return id_to_item_controller_map_[id]->app_id();
}

void ChromeLauncherController::SetAppImage(const std::string& id,
                                           const gfx::ImageSkia& image) {
  // TODO: need to get this working for shortcuts.
  for (IDToItemControllerMap::const_iterator i =
           id_to_item_controller_map_.begin();
       i != id_to_item_controller_map_.end(); ++i) {
    LauncherItemController* controller = i->second;
    if (controller->app_id() != id)
      continue;
    if (controller->image_set_by_controller())
      continue;
    int index = model_->ItemIndexByID(i->first);
    if (index == -1)
      continue;
    ash::ShelfItem item = model_->items()[index];
    item.image = image;
    model_->Set(index, item);
    // It's possible we're waiting on more than one item, so don't break.
  }
}

void ChromeLauncherController::OnAutoHideBehaviorChanged(
    aura::Window* root_window,
    ash::ShelfAutoHideBehavior new_behavior) {
  SetShelfAutoHideBehaviorPrefs(new_behavior, root_window);
}

void ChromeLauncherController::SetLauncherItemImage(
    ash::ShelfID shelf_id,
    const gfx::ImageSkia& image) {
  int index = model_->ItemIndexByID(shelf_id);
  if (index == -1)
    return;
  ash::ShelfItem item = model_->items()[index];
  item.image = image;
  model_->Set(index, item);
}

bool ChromeLauncherController::CanPin() const {
  const PrefService::Preference* pref =
      profile_->GetPrefs()->FindPreference(prefs::kPinnedLauncherApps);
  return pref && pref->IsUserModifiable();
}

bool ChromeLauncherController::IsAppPinned(const std::string& app_id) {
  for (IDToItemControllerMap::const_iterator i =
           id_to_item_controller_map_.begin();
       i != id_to_item_controller_map_.end(); ++i) {
    if (IsPinned(i->first) && i->second->app_id() == app_id)
      return true;
  }
  return false;
}

bool ChromeLauncherController::IsWindowedAppInLauncher(
    const std::string& app_id) {
  int index = model_->ItemIndexByID(GetShelfIDForAppID(app_id));
  if (index < 0)
    return false;

  ash::ShelfItemType type = model_->items()[index].type;
  return type == ash::TYPE_WINDOWED_APP;
}

void ChromeLauncherController::PinAppWithID(const std::string& app_id) {
  if (CanPin())
    DoPinAppWithID(app_id);
  else
    NOTREACHED();
}

void ChromeLauncherController::SetLaunchType(
    ash::ShelfID id,
    extensions::LaunchType launch_type) {
  if (!HasItemController(id))
    return;

  extensions::SetLaunchType(profile_->GetExtensionService(),
                            id_to_item_controller_map_[id]->app_id(),
                            launch_type);
}

void ChromeLauncherController::UnpinAppWithID(const std::string& app_id) {
  if (CanPin())
    DoUnpinAppWithID(app_id);
  else
    NOTREACHED();
}

bool ChromeLauncherController::IsLoggedInAsGuest() {
  return profile_->IsGuestSession();
}

void ChromeLauncherController::CreateNewWindow() {
  // Use the currently active user.
  chrome::NewEmptyWindow(profile_, chrome::HOST_DESKTOP_TYPE_ASH);
}

void ChromeLauncherController::CreateNewIncognitoWindow() {
  // Use the currently active user.
  chrome::NewEmptyWindow(profile_->GetOffTheRecordProfile(),
                         chrome::HOST_DESKTOP_TYPE_ASH);
}

void ChromeLauncherController::PersistPinnedState() {
  if (ignore_persist_pinned_state_change_)
    return;
  // It is a coding error to call PersistPinnedState() if the pinned apps are
  // not user-editable. The code should check earlier and not perform any
  // modification actions that trigger persisting the state.
  if (!CanPin()) {
    NOTREACHED() << "Can't pin but pinned state being updated";
    return;
  }
  // Mutating kPinnedLauncherApps is going to notify us and trigger us to
  // process the change. We don't want that to happen so remove ourselves as a
  // listener.
  pref_change_registrar_.Remove(prefs::kPinnedLauncherApps);
  {
    ListPrefUpdate updater(profile_->GetPrefs(), prefs::kPinnedLauncherApps);
    updater->Clear();
    for (size_t i = 0; i < model_->items().size(); ++i) {
      if (model_->items()[i].type == ash::TYPE_APP_SHORTCUT) {
        ash::ShelfID id = model_->items()[i].id;
        if (HasItemController(id) && IsPinned(id)) {
          base::DictionaryValue* app_value = ash::CreateAppDict(
              id_to_item_controller_map_[id]->app_id());
          if (app_value)
            updater->Append(app_value);
        }
      } else if (model_->items()[i].type == ash::TYPE_BROWSER_SHORTCUT) {
        PersistChromeItemIndex(i);
      } else if (model_->items()[i].type == ash::TYPE_APP_LIST) {
        base::DictionaryValue* app_value = ash::CreateAppDict(
            kAppShelfIdPlaceholder);
        if (app_value)
          updater->Append(app_value);
      }
    }
  }
  pref_change_registrar_.Add(
      prefs::kPinnedLauncherApps,
      base::Bind(&ChromeLauncherController::UpdateAppLaunchersFromPref,
                 base::Unretained(this)));
}

ash::ShelfModel* ChromeLauncherController::model() {
  return model_;
}

Profile* ChromeLauncherController::profile() {
  return profile_;
}

ash::ShelfAutoHideBehavior ChromeLauncherController::GetShelfAutoHideBehavior(
    aura::Window* root_window) const {
  // Don't show the shelf in app mode.
  if (chrome::IsRunningInAppMode())
    return ash::SHELF_AUTO_HIDE_ALWAYS_HIDDEN;

  // See comment in |kShelfAlignment| as to why we consider two prefs.
  const std::string behavior_value(
      GetPrefForRootWindow(profile_->GetPrefs(),
                           root_window,
                           prefs::kShelfAutoHideBehaviorLocal,
                           prefs::kShelfAutoHideBehavior));

  // Note: To maintain sync compatibility with old images of chrome/chromeos
  // the set of values that may be encountered includes the now-extinct
  // "Default" as well as "Never" and "Always", "Default" should now
  // be treated as "Never" (http://crbug.com/146773).
  if (behavior_value == ash::kShelfAutoHideBehaviorAlways)
    return ash::SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS;
  return ash::SHELF_AUTO_HIDE_BEHAVIOR_NEVER;
}

bool ChromeLauncherController::CanUserModifyShelfAutoHideBehavior(
    aura::Window* root_window) const {
  return !ash::Shell::GetInstance()->IsMaximizeModeWindowManagerEnabled() &&
      profile_->GetPrefs()->FindPreference(
          prefs::kShelfAutoHideBehaviorLocal)->IsUserModifiable();
}

void ChromeLauncherController::ToggleShelfAutoHideBehavior(
    aura::Window* root_window) {
  ash::ShelfAutoHideBehavior behavior = GetShelfAutoHideBehavior(root_window) ==
      ash::SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS ?
          ash::SHELF_AUTO_HIDE_BEHAVIOR_NEVER :
          ash::SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS;
  SetShelfAutoHideBehaviorPrefs(behavior, root_window);
  return;
}

void ChromeLauncherController::UpdateAppState(content::WebContents* contents,
                                              AppState app_state) {
  std::string app_id = app_tab_helper_->GetAppID(contents);

  // Check if the gMail app is loaded and it matches the given content.
  // This special treatment is needed to address crbug.com/234268.
  if (app_id.empty() && ContentCanBeHandledByGmailApp(contents))
    app_id = kGmailAppId;

  // Check the old |app_id| for a tab. If the contents has changed we need to
  // remove it from the previous app.
  if (web_contents_to_app_id_.find(contents) != web_contents_to_app_id_.end()) {
    std::string last_app_id = web_contents_to_app_id_[contents];
    if (last_app_id != app_id) {
      ash::ShelfID id = GetShelfIDForAppID(last_app_id);
      if (id) {
        // Since GetAppState() will use |web_contents_to_app_id_| we remove
        // the connection before calling it.
        web_contents_to_app_id_.erase(contents);
        SetItemStatus(id, GetAppState(last_app_id));
      }
    }
  }

  if (app_state == APP_STATE_REMOVED)
    web_contents_to_app_id_.erase(contents);
  else
    web_contents_to_app_id_[contents] = app_id;

  ash::ShelfID id = GetShelfIDForAppID(app_id);
  if (id) {
    SetItemStatus(id, (app_state == APP_STATE_WINDOW_ACTIVE ||
                       app_state == APP_STATE_ACTIVE) ? ash::STATUS_ACTIVE :
                                                        GetAppState(app_id));
  }
}

ash::ShelfID ChromeLauncherController::GetShelfIDForWebContents(
    content::WebContents* contents) {
  DCHECK(contents);

  std::string app_id = app_tab_helper_->GetAppID(contents);

  if (app_id.empty() && ContentCanBeHandledByGmailApp(contents))
    app_id = kGmailAppId;

  ash::ShelfID id = GetShelfIDForAppID(app_id);

  if (app_id.empty() || !id) {
    int browser_index = model_->GetItemIndexForType(ash::TYPE_BROWSER_SHORTCUT);
    return model_->items()[browser_index].id;
  }

  return id;
}

void ChromeLauncherController::SetRefocusURLPatternForTest(ash::ShelfID id,
                                                           const GURL& url) {
  DCHECK(HasItemController(id));
  LauncherItemController* controller = id_to_item_controller_map_[id];

  int index = model_->ItemIndexByID(id);
  if (index == -1) {
    NOTREACHED() << "Invalid launcher id";
    return;
  }

  ash::ShelfItemType type = model_->items()[index].type;
  if (type == ash::TYPE_APP_SHORTCUT || type == ash::TYPE_WINDOWED_APP) {
    AppShortcutLauncherItemController* app_controller =
        static_cast<AppShortcutLauncherItemController*>(controller);
    app_controller->set_refocus_url(url);
  } else {
    NOTREACHED() << "Invalid launcher type";
  }
}

const Extension* ChromeLauncherController::GetExtensionForAppID(
    const std::string& app_id) const {
  // Some unit tests do not have a real extension.
  return (profile_->GetExtensionService()) ?
      profile_->GetExtensionService()->GetInstalledExtension(app_id) : NULL;
}

void ChromeLauncherController::ActivateWindowOrMinimizeIfActive(
    ui::BaseWindow* window,
    bool allow_minimize) {
  // In separated desktop mode we might have to teleport a window back to the
  // current user.
  if (chrome::MultiUserWindowManager::GetMultiProfileMode() ==
          chrome::MultiUserWindowManager::MULTI_PROFILE_MODE_SEPARATED) {
    aura::Window* native_window = window->GetNativeWindow();
    const std::string& current_user =
        multi_user_util::GetUserIDFromProfile(profile());
    chrome::MultiUserWindowManager* manager =
        chrome::MultiUserWindowManager::GetInstance();
    if (!manager->IsWindowOnDesktopOfUser(native_window, current_user)) {
      ash::MultiProfileUMA::RecordTeleportAction(
          ash::MultiProfileUMA::TELEPORT_WINDOW_RETURN_BY_LAUNCHER);
      manager->ShowWindowForUser(native_window, current_user);
      window->Activate();
      return;
    }
  }

  if (window->IsActive() && allow_minimize) {
    if (CommandLine::ForCurrentProcess()->HasSwitch(
            switches::kDisableMinimizeOnSecondLauncherItemClick)) {
      AnimateWindow(window->GetNativeWindow(),
                    wm::WINDOW_ANIMATION_TYPE_BOUNCE);
    } else {
      window->Minimize();
    }
  } else {
    window->Show();
    window->Activate();
  }
}

void ChromeLauncherController::OnShelfCreated(ash::Shelf* shelf) {
  shelves_.insert(shelf);
  shelf->shelf_widget()->shelf_layout_manager()->AddObserver(this);
}

void ChromeLauncherController::OnShelfDestroyed(ash::Shelf* shelf) {
  shelves_.erase(shelf);
  // RemoveObserver is not called here, since by the time this method is called
  // Shelf is already in its destructor.
}

void ChromeLauncherController::ShelfItemAdded(int index) {
  // The app list launcher can get added to the shelf after we applied the
  // preferences. In that case the item might be at the wrong spot. As such we
  // call the function again.
  if (model_->items()[index].type == ash::TYPE_APP_LIST &&
      ash::switches::UseAlternateShelfLayout())
    UpdateAppLaunchersFromPref();
}

void ChromeLauncherController::ShelfItemRemoved(int index, ash::ShelfID id) {
}

void ChromeLauncherController::ShelfItemMoved(int start_index,
                                              int target_index) {
  const ash::ShelfItem& item = model_->items()[target_index];
  // We remember the moved item position if it is either pinnable or
  // it is the app list with the alternate shelf layout.
  if ((HasItemController(item.id) && IsPinned(item.id)) ||
      (ash::switches::UseAlternateShelfLayout() &&
       item.type == ash::TYPE_APP_LIST))
    PersistPinnedState();
}

void ChromeLauncherController::ShelfItemChanged(
    int index,
    const ash::ShelfItem& old_item) {
}

void ChromeLauncherController::ShelfStatusChanged() {
}

void ChromeLauncherController::ActiveUserChanged(
    const std::string& user_email) {
  // Store the order of running applications for the user which gets inactive.
  RememberUnpinnedRunningApplicationOrder();
  // Coming here the default profile is already switched. All profile specific
  // resources get released and the new profile gets attached instead.
  ReleaseProfile();
  // When coming here, the active user has already be changed so that we can
  // set it as active.
  AttachProfile(ProfileManager::GetActiveUserProfile());
  // Update the V1 applications.
  browser_status_monitor_->ActiveUserChanged(user_email);
  // Switch the running applications to the new user.
  app_window_controller_->ActiveUserChanged(user_email);
  // Update the user specific shell properties from the new user profile.
  UpdateAppLaunchersFromPref();
  SetShelfAlignmentFromPrefs();
  SetShelfAutoHideBehaviorFromPrefs();
  SetShelfBehaviorsFromPrefs();
  // Restore the order of running, but unpinned applications for the activated
  // user.
  RestoreUnpinnedRunningApplicationOrder(user_email);
  // Inform the system tray of the change.
  ash::Shell::GetInstance()->system_tray_delegate()->ActiveUserWasChanged();
}

void ChromeLauncherController::AdditionalUserAddedToSession(Profile* profile) {
  // Switch the running applications to the new user.
  app_window_controller_->AdditionalUserAddedToSession(profile);
}

void ChromeLauncherController::Observe(
    int type,
    const content::NotificationSource& source,
    const content::NotificationDetails& details) {
  switch (type) {
    case chrome::NOTIFICATION_EXTENSION_LOADED: {
      const Extension* extension =
          content::Details<const Extension>(details).ptr();
      if (IsAppPinned(extension->id())) {
        // Clear and re-fetch to ensure icon is up-to-date.
        app_icon_loader_->ClearImage(extension->id());
        app_icon_loader_->FetchImage(extension->id());
      }

      UpdateAppLaunchersFromPref();
      break;
    }
    case chrome::NOTIFICATION_EXTENSION_UNLOADED_DEPRECATED: {
      const content::Details<UnloadedExtensionInfo>& unload_info(details);
      const Extension* extension = unload_info->extension;
      const std::string& id = extension->id();
      // Since we might have windowed apps of this type which might have
      // outstanding locks which needs to be removed.
      if (GetShelfIDForAppID(id) &&
          unload_info->reason == UnloadedExtensionInfo::REASON_UNINSTALL) {
        CloseWindowedAppsFromRemovedExtension(id);
      }

      if (IsAppPinned(id)) {
        if (unload_info->reason == UnloadedExtensionInfo::REASON_UNINSTALL) {
          DoUnpinAppWithID(id);
          app_icon_loader_->ClearImage(id);
        } else {
          app_icon_loader_->UpdateImage(id);
        }
      }
      break;
    }
    default:
      NOTREACHED() << "Unexpected notification type=" << type;
  }
}

void ChromeLauncherController::OnShelfAlignmentChanged(
    aura::Window* root_window) {
  const char* pref_value = NULL;
  switch (ash::Shell::GetInstance()->GetShelfAlignment(root_window)) {
    case ash::SHELF_ALIGNMENT_BOTTOM:
      pref_value = ash::kShelfAlignmentBottom;
      break;
    case ash::SHELF_ALIGNMENT_LEFT:
      pref_value = ash::kShelfAlignmentLeft;
      break;
    case ash::SHELF_ALIGNMENT_RIGHT:
      pref_value = ash::kShelfAlignmentRight;
      break;
    case ash::SHELF_ALIGNMENT_TOP:
      pref_value = ash::kShelfAlignmentTop;
  }

  UpdatePerDisplayPref(
      profile_->GetPrefs(), root_window, prefs::kShelfAlignment, pref_value);

  if (root_window == ash::Shell::GetPrimaryRootWindow()) {
    // See comment in |kShelfAlignment| about why we have two prefs here.
    profile_->GetPrefs()->SetString(prefs::kShelfAlignmentLocal, pref_value);
    profile_->GetPrefs()->SetString(prefs::kShelfAlignment, pref_value);
  }
}

void ChromeLauncherController::OnDisplayConfigurationChanged() {
  SetShelfBehaviorsFromPrefs();
}

void ChromeLauncherController::OnIsSyncingChanged() {
  PrefServiceSyncable* prefs = PrefServiceSyncable::FromProfile(profile_);
  MaybePropagatePrefToLocal(prefs,
                            prefs::kShelfAlignmentLocal,
                            prefs::kShelfAlignment);
  MaybePropagatePrefToLocal(prefs,
                            prefs::kShelfAutoHideBehaviorLocal,
                            prefs::kShelfAutoHideBehavior);
}

void ChromeLauncherController::OnAppSyncUIStatusChanged() {
  if (app_sync_ui_state_->status() == AppSyncUIState::STATUS_SYNCING)
    model_->SetStatus(ash::ShelfModel::STATUS_LOADING);
  else
    model_->SetStatus(ash::ShelfModel::STATUS_NORMAL);
}

void ChromeLauncherController::ExtensionEnableFlowFinished() {
  LaunchApp(extension_enable_flow_->extension_id(),
            ash::LAUNCH_FROM_UNKNOWN,
            ui::EF_NONE);
  extension_enable_flow_.reset();
}

void ChromeLauncherController::ExtensionEnableFlowAborted(bool user_initiated) {
  extension_enable_flow_.reset();
}

ChromeLauncherAppMenuItems ChromeLauncherController::GetApplicationList(
    const ash::ShelfItem& item,
    int event_flags) {
  // Make sure that there is a controller associated with the id and that the
  // extension itself is a valid application and not a panel.
  if (!HasItemController(item.id) ||
      !GetShelfIDForAppID(id_to_item_controller_map_[item.id]->app_id()))
    return ChromeLauncherAppMenuItems().Pass();

  return id_to_item_controller_map_[item.id]->GetApplicationList(event_flags);
}

std::vector<content::WebContents*>
ChromeLauncherController::GetV1ApplicationsFromAppId(std::string app_id) {
  ash::ShelfID id = GetShelfIDForAppID(app_id);

  // If there is no such an item pinned to the launcher, no menu gets created.
  if (id) {
    LauncherItemController* controller = id_to_item_controller_map_[id];
    DCHECK(controller);
    if (controller->type() == LauncherItemController::TYPE_SHORTCUT)
      return GetV1ApplicationsFromController(controller);
  }
  return std::vector<content::WebContents*>();
}

void ChromeLauncherController::ActivateShellApp(const std::string& app_id,
                                                int index) {
  ash::ShelfID id = GetShelfIDForAppID(app_id);
  if (id) {
    LauncherItemController* controller = id_to_item_controller_map_[id];
    if (controller->type() == LauncherItemController::TYPE_APP) {
      AppWindowLauncherItemController* app_window_controller =
          static_cast<AppWindowLauncherItemController*>(controller);
      app_window_controller->ActivateIndexedApp(index);
    }
  }
}

bool ChromeLauncherController::IsWebContentHandledByApplication(
    content::WebContents* web_contents,
    const std::string& app_id) {
  if ((web_contents_to_app_id_.find(web_contents) !=
       web_contents_to_app_id_.end()) &&
      (web_contents_to_app_id_[web_contents] == app_id))
    return true;
  return (app_id == kGmailAppId && ContentCanBeHandledByGmailApp(web_contents));
}

bool ChromeLauncherController::ContentCanBeHandledByGmailApp(
    content::WebContents* web_contents) {
  ash::ShelfID id = GetShelfIDForAppID(kGmailAppId);
  if (id) {
    const GURL url = web_contents->GetURL();
    // We need to extend the application matching for the gMail app beyond the
    // manifest file's specification. This is required because of the namespace
    // overlap with the offline app ("/mail/mu/").
    if (!MatchPattern(url.path(), "/mail/mu/*") &&
        MatchPattern(url.path(), "/mail/*") &&
        GetExtensionForAppID(kGmailAppId) &&
        GetExtensionForAppID(kGmailAppId)->OverlapsWithOrigin(url))
      return true;
  }
  return false;
}

gfx::Image ChromeLauncherController::GetAppListIcon(
    content::WebContents* web_contents) const {
  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
  if (IsIncognito(web_contents))
    return rb.GetImageNamed(IDR_AURA_LAUNCHER_LIST_INCOGNITO_BROWSER);
  FaviconTabHelper* favicon_tab_helper =
      FaviconTabHelper::FromWebContents(web_contents);
  gfx::Image result = favicon_tab_helper->GetFavicon();
  if (result.IsEmpty())
    return rb.GetImageNamed(IDR_DEFAULT_FAVICON);
  return result;
}

base::string16 ChromeLauncherController::GetAppListTitle(
    content::WebContents* web_contents) const {
  base::string16 title = web_contents->GetTitle();
  if (!title.empty())
    return title;
  WebContentsToAppIDMap::const_iterator iter =
      web_contents_to_app_id_.find(web_contents);
  if (iter != web_contents_to_app_id_.end()) {
    std::string app_id = iter->second;
    const extensions::Extension* extension = GetExtensionForAppID(app_id);
    if (extension)
      return base::UTF8ToUTF16(extension->name());
  }
  return l10n_util::GetStringUTF16(IDS_NEW_TAB_TITLE);
}

ash::ShelfID ChromeLauncherController::CreateAppShortcutLauncherItem(
    const std::string& app_id,
    int index) {
  return CreateAppShortcutLauncherItemWithType(app_id,
                                               index,
                                               ash::TYPE_APP_SHORTCUT);
}

void ChromeLauncherController::SetAppTabHelperForTest(AppTabHelper* helper) {
  app_tab_helper_.reset(helper);
}

void ChromeLauncherController::SetAppIconLoaderForTest(
    extensions::AppIconLoader* loader) {
  app_icon_loader_.reset(loader);
}

const std::string& ChromeLauncherController::GetAppIdFromShelfIdForTest(
    ash::ShelfID id) {
  return id_to_item_controller_map_[id]->app_id();
}

void ChromeLauncherController::SetShelfItemDelegateManagerForTest(
    ash::ShelfItemDelegateManager* manager) {
  item_delegate_manager_ = manager;
}

void ChromeLauncherController::RememberUnpinnedRunningApplicationOrder() {
  RunningAppListIds list;
  for (int i = 0; i < model_->item_count(); i++) {
    ash::ShelfItemType type = model_->items()[i].type;
    if (type == ash::TYPE_WINDOWED_APP || type == ash::TYPE_PLATFORM_APP)
      list.push_back(GetAppIDForShelfID(model_->items()[i].id));
  }
  last_used_running_application_order_[
      multi_user_util::GetUserIDFromProfile(profile_)] = list;
}

void ChromeLauncherController::RestoreUnpinnedRunningApplicationOrder(
    const std::string& user_id) {
  const RunningAppListIdMap::iterator app_id_list =
      last_used_running_application_order_.find(user_id);
  if (app_id_list == last_used_running_application_order_.end())
    return;

  // Find the first insertion point for running applications.
  int running_index = model_->FirstRunningAppIndex();
  for (RunningAppListIds::iterator app_id = app_id_list->second.begin();
       app_id != app_id_list->second.end(); ++app_id) {
    ash::ShelfID shelf_id = GetShelfIDForAppID(*app_id);
    if (shelf_id) {
      int app_index = model_->ItemIndexByID(shelf_id);
      DCHECK_GE(app_index, 0);
      ash::ShelfItemType type = model_->items()[app_index].type;
      if (type == ash::TYPE_WINDOWED_APP || type == ash::TYPE_PLATFORM_APP) {
        if (running_index != app_index)
          model_->Move(running_index, app_index);
        running_index++;
      }
    }
  }
}

ash::ShelfID ChromeLauncherController::CreateAppShortcutLauncherItemWithType(
    const std::string& app_id,
    int index,
    ash::ShelfItemType shelf_item_type) {
  AppShortcutLauncherItemController* controller =
      new AppShortcutLauncherItemController(app_id, this);
  ash::ShelfID shelf_id = InsertAppLauncherItem(
      controller, app_id, ash::STATUS_CLOSED, index, shelf_item_type);
  return shelf_id;
}

LauncherItemController* ChromeLauncherController::GetLauncherItemController(
    const ash::ShelfID id) {
  if (!HasItemController(id))
    return NULL;
  return id_to_item_controller_map_[id];
}

bool ChromeLauncherController::IsBrowserFromActiveUser(Browser* browser) {
  // If running multi user mode with separate desktops, we have to check if the
  // browser is from the active user.
  if (chrome::MultiUserWindowManager::GetMultiProfileMode() !=
          chrome::MultiUserWindowManager::MULTI_PROFILE_MODE_SEPARATED)
    return true;
  return multi_user_util::IsProfileFromActiveUser(browser->profile());
}

void ChromeLauncherController::LauncherItemClosed(ash::ShelfID id) {
  IDToItemControllerMap::iterator iter = id_to_item_controller_map_.find(id);
  CHECK(iter != id_to_item_controller_map_.end());
  CHECK(iter->second);
  app_icon_loader_->ClearImage(iter->second->app_id());
  id_to_item_controller_map_.erase(iter);
  int index = model_->ItemIndexByID(id);
  // A "browser proxy" is not known to the model and this removal does
  // therefore not need to be propagated to the model.
  if (index != -1)
    model_->RemoveItemAt(index);
}

void ChromeLauncherController::DoPinAppWithID(const std::string& app_id) {
  // If there is an item, do nothing and return.
  if (IsAppPinned(app_id))
    return;

  ash::ShelfID shelf_id = GetShelfIDForAppID(app_id);
  if (shelf_id) {
    // App item exists, pin it
    Pin(shelf_id);
  } else {
    // Otherwise, create a shortcut item for it.
    CreateAppShortcutLauncherItem(app_id, model_->item_count());
    if (CanPin())
      PersistPinnedState();
  }
}

void ChromeLauncherController::DoUnpinAppWithID(const std::string& app_id) {
  ash::ShelfID shelf_id = GetShelfIDForAppID(app_id);
  if (shelf_id && IsPinned(shelf_id))
    Unpin(shelf_id);
}

int ChromeLauncherController::PinRunningAppInternal(int index,
                                                    ash::ShelfID shelf_id) {
  int running_index = model_->ItemIndexByID(shelf_id);
  ash::ShelfItem item = model_->items()[running_index];
  DCHECK(item.type == ash::TYPE_WINDOWED_APP ||
         item.type == ash::TYPE_PLATFORM_APP);
  item.type = ash::TYPE_APP_SHORTCUT;
  model_->Set(running_index, item);
  // The |ShelfModel|'s weight system might reposition the item to a
  // new index, so we get the index again.
  running_index = model_->ItemIndexByID(shelf_id);
  if (running_index < index)
    --index;
  if (running_index != index)
    model_->Move(running_index, index);
  return index;
}

void ChromeLauncherController::UnpinRunningAppInternal(int index) {
  DCHECK_GE(index, 0);
  ash::ShelfItem item = model_->items()[index];
  DCHECK_EQ(item.type, ash::TYPE_APP_SHORTCUT);
  item.type = ash::TYPE_WINDOWED_APP;
  // A platform app and a windowed app are sharing TYPE_APP_SHORTCUT. As such
  // we have to check here what this was before it got a shortcut.
  if (HasItemController(item.id) &&
      id_to_item_controller_map_[item.id]->type() ==
          LauncherItemController::TYPE_APP)
    item.type = ash::TYPE_PLATFORM_APP;
  model_->Set(index, item);
}

void ChromeLauncherController::UpdateAppLaunchersFromPref() {
  // There are various functions which will trigger a |PersistPinnedState| call
  // like a direct call to |DoPinAppWithID|, or an indirect call to the menu
  // model which will use weights to re-arrange the icons to new positions.
  // Since this function is meant to synchronize the "is state" with the
  // "sync state", it makes no sense to store any changes by this function back
  // into the pref state. Therefore we tell |persistPinnedState| to ignore any
  // invocations while we are running.
  base::AutoReset<bool> auto_reset(&ignore_persist_pinned_state_change_, true);
  std::vector<std::string> pinned_apps = GetListOfPinnedAppsAndBrowser();

  int index = 0;
  int max_index = model_->item_count();

  // When one of the two special items cannot be moved (and we do not know where
  // yet), we remember the current location in one of these variables.
  int chrome_index = -1;
  int app_list_index = -1;

  // Walk the model and |pinned_apps| from the pref lockstep, adding and
  // removing items as necessary. NB: This code uses plain old indexing instead
  // of iterators because of model mutations as part of the loop.
  std::vector<std::string>::const_iterator pref_app_id(pinned_apps.begin());
  for (; index < max_index && pref_app_id != pinned_apps.end(); ++index) {
    // Check if we have an item which we need to handle.
    if (*pref_app_id == extension_misc::kChromeAppId ||
        *pref_app_id == kAppShelfIdPlaceholder ||
        IsAppPinned(*pref_app_id)) {
      for (; index < max_index; ++index) {
        const ash::ShelfItem& item(model_->items()[index]);
        bool is_app_list = item.type == ash::TYPE_APP_LIST;
        bool is_chrome = item.type == ash::TYPE_BROWSER_SHORTCUT;
        if (item.type != ash::TYPE_APP_SHORTCUT && !is_app_list && !is_chrome)
          continue;
        IDToItemControllerMap::const_iterator entry =
            id_to_item_controller_map_.find(item.id);
        if ((kAppShelfIdPlaceholder == *pref_app_id && is_app_list) ||
            (extension_misc::kChromeAppId == *pref_app_id && is_chrome) ||
            (entry != id_to_item_controller_map_.end() &&
             entry->second->app_id() == *pref_app_id)) {
          // Check if an item needs to be moved here.
          MoveChromeOrApplistToFinalPosition(
              is_chrome, is_app_list, index, &chrome_index, &app_list_index);
          ++pref_app_id;
          break;
        } else {
          if (is_chrome || is_app_list) {
            // We cannot delete any of these shortcuts. As such we remember
            // their positions and move them later where they belong.
            if (is_chrome)
              chrome_index = index;
            else
              app_list_index = index;
            // And skip the item - or exit the loop if end is reached (note that
            // in that case we will reduce the index again by one and this only
            // compensates for it).
            if (index >= max_index - 1)
              break;
            ++index;
          } else {
            // Check if this is a platform or a windowed app.
            if (item.type == ash::TYPE_APP_SHORTCUT &&
                (id_to_item_controller_map_[item.id]->locked() ||
                 id_to_item_controller_map_[item.id]->type() ==
                     LauncherItemController::TYPE_APP)) {
              // Note: This will not change the amount of items (|max_index|).
              // Even changes to the actual |index| due to item weighting
              // changes should be fine.
              UnpinRunningAppInternal(index);
            } else {
              LauncherItemClosed(item.id);
              --max_index;
            }
          }
          --index;
        }
      }
      // If the item wasn't found, that means id_to_item_controller_map_
      // is out of sync.
      DCHECK(index <= max_index);
    } else {
      // Check if the item was already running but not yet pinned.
      ash::ShelfID shelf_id = GetShelfIDForAppID(*pref_app_id);
      if (shelf_id) {
        // This app is running but not yet pinned. So pin and move it.
        index = PinRunningAppInternal(index, shelf_id);
      } else {
        // This app wasn't pinned before, insert a new entry.
        shelf_id = CreateAppShortcutLauncherItem(*pref_app_id, index);
        ++max_index;
        index = model_->ItemIndexByID(shelf_id);
      }
      ++pref_app_id;
    }
  }

  // Remove any trailing existing items.
  while (index < model_->item_count()) {
    const ash::ShelfItem& item(model_->items()[index]);
    if (item.type == ash::TYPE_APP_SHORTCUT) {
      if (id_to_item_controller_map_[item.id]->locked() ||
          id_to_item_controller_map_[item.id]->type() ==
              LauncherItemController::TYPE_APP)
        UnpinRunningAppInternal(index);
      else
        LauncherItemClosed(item.id);
    } else {
      if (item.type == ash::TYPE_BROWSER_SHORTCUT)
        chrome_index = index;
      else if (item.type == ash::TYPE_APP_LIST)
        app_list_index = index;
      ++index;
    }
  }

  // Append unprocessed items from the pref to the end of the model.
  for (; pref_app_id != pinned_apps.end(); ++pref_app_id) {
    // All items but the chrome and / or app list shortcut needs to be added.
    bool is_chrome = *pref_app_id == extension_misc::kChromeAppId;
    bool is_app_list = *pref_app_id == kAppShelfIdPlaceholder;
    // Coming here we know the next item which can be finalized, either the
    // chrome item or the app launcher. The final position is the end of the
    // list. The menu model will make sure that the item is grouped according
    // to its weight (which we do not know here).
    if (!is_chrome && !is_app_list) {
      DoPinAppWithID(*pref_app_id);
      int target_index = FindInsertionPoint(false);
      ash::ShelfID id = GetShelfIDForAppID(*pref_app_id);
      int source_index = model_->ItemIndexByID(id);
      if (source_index != target_index)
        model_->Move(source_index, target_index);

      // Needed for the old layout - the weight might force it to be lower in
      // rank.
      if (app_list_index != -1 && target_index <= app_list_index)
        ++app_list_index;
    } else {
      int target_index = FindInsertionPoint(is_app_list);
      MoveChromeOrApplistToFinalPosition(
          is_chrome, is_app_list, target_index, &chrome_index, &app_list_index);
    }
  }
}

void ChromeLauncherController::SetShelfAutoHideBehaviorPrefs(
    ash::ShelfAutoHideBehavior behavior,
    aura::Window* root_window) {
  const char* value = NULL;
  switch (behavior) {
    case ash::SHELF_AUTO_HIDE_BEHAVIOR_ALWAYS:
      value = ash::kShelfAutoHideBehaviorAlways;
      break;
    case ash::SHELF_AUTO_HIDE_BEHAVIOR_NEVER:
      value = ash::kShelfAutoHideBehaviorNever;
      break;
    case ash::SHELF_AUTO_HIDE_ALWAYS_HIDDEN:
      // This one should not be a valid preference option for now. We only want
      // to completely hide it when we run in app mode - or while we temporarily
      // hide the shelf as part of an animation (e.g. the multi user change).
      return;
  }

  UpdatePerDisplayPref(
      profile_->GetPrefs(), root_window, prefs::kShelfAutoHideBehavior, value);

  if (root_window == ash::Shell::GetPrimaryRootWindow()) {
    // See comment in |kShelfAlignment| about why we have two prefs here.
    profile_->GetPrefs()->SetString(prefs::kShelfAutoHideBehaviorLocal, value);
    profile_->GetPrefs()->SetString(prefs::kShelfAutoHideBehavior, value);
  }
}

void ChromeLauncherController::SetShelfAutoHideBehaviorFromPrefs() {
  aura::Window::Windows root_windows = ash::Shell::GetAllRootWindows();

  for (aura::Window::Windows::const_iterator iter = root_windows.begin();
       iter != root_windows.end(); ++iter) {
    ash::Shell::GetInstance()->SetShelfAutoHideBehavior(
        GetShelfAutoHideBehavior(*iter), *iter);
  }
}

void ChromeLauncherController::SetShelfAlignmentFromPrefs() {
  if (!ash::ShelfWidget::ShelfAlignmentAllowed())
    return;

  aura::Window::Windows root_windows = ash::Shell::GetAllRootWindows();

  for (aura::Window::Windows::const_iterator iter = root_windows.begin();
       iter != root_windows.end(); ++iter) {
    // See comment in |kShelfAlignment| as to why we consider two prefs.
    const std::string alignment_value(
        GetPrefForRootWindow(profile_->GetPrefs(),
                             *iter,
                             prefs::kShelfAlignmentLocal,
                             prefs::kShelfAlignment));
    ash::ShelfAlignment alignment = ash::SHELF_ALIGNMENT_BOTTOM;
    if (alignment_value == ash::kShelfAlignmentLeft)
      alignment = ash::SHELF_ALIGNMENT_LEFT;
    else if (alignment_value == ash::kShelfAlignmentRight)
      alignment = ash::SHELF_ALIGNMENT_RIGHT;
    else if (alignment_value == ash::kShelfAlignmentTop)
      alignment = ash::SHELF_ALIGNMENT_TOP;
    ash::Shell::GetInstance()->SetShelfAlignment(alignment, *iter);
  }
}

void ChromeLauncherController::SetShelfBehaviorsFromPrefs() {
  SetShelfAutoHideBehaviorFromPrefs();
  SetShelfAlignmentFromPrefs();
}

ash::ShelfItemStatus ChromeLauncherController::GetAppState(
    const::std::string& app_id) {
  ash::ShelfItemStatus status = ash::STATUS_CLOSED;
  for (WebContentsToAppIDMap::iterator it = web_contents_to_app_id_.begin();
       it != web_contents_to_app_id_.end();
       ++it) {
    if (it->second == app_id) {
      Browser* browser = chrome::FindBrowserWithWebContents(it->first);
      // Usually there should never be an item in our |web_contents_to_app_id_|
      // list which got deleted already. However - in some situations e.g.
      // Browser::SwapTabContent there is temporarily no associated browser.
      if (!browser)
        continue;
      if (browser->window()->IsActive()) {
        return browser->tab_strip_model()->GetActiveWebContents() == it->first ?
            ash::STATUS_ACTIVE : ash::STATUS_RUNNING;
      } else {
        status = ash::STATUS_RUNNING;
      }
    }
  }
  return status;
}

ash::ShelfID ChromeLauncherController::InsertAppLauncherItem(
    LauncherItemController* controller,
    const std::string& app_id,
    ash::ShelfItemStatus status,
    int index,
    ash::ShelfItemType shelf_item_type) {
  ash::ShelfID id = model_->next_id();
  CHECK(!HasItemController(id));
  CHECK(controller);
  id_to_item_controller_map_[id] = controller;
  controller->set_shelf_id(id);

  ash::ShelfItem item;
  item.type = shelf_item_type;
  item.image = extensions::IconsInfo::GetDefaultAppIcon();

  ash::ShelfItemStatus new_state = GetAppState(app_id);
  if (new_state != ash::STATUS_CLOSED)
    status = new_state;

  item.status = status;

  model_->AddAt(index, item);

  app_icon_loader_->FetchImage(app_id);

  SetShelfItemDelegate(id, controller);

  return id;
}

bool ChromeLauncherController::HasItemController(ash::ShelfID id) const {
  return id_to_item_controller_map_.find(id) !=
         id_to_item_controller_map_.end();
}

std::vector<content::WebContents*>
ChromeLauncherController::GetV1ApplicationsFromController(
    LauncherItemController* controller) {
  DCHECK(controller->type() == LauncherItemController::TYPE_SHORTCUT);
  AppShortcutLauncherItemController* app_controller =
      static_cast<AppShortcutLauncherItemController*>(controller);
  return app_controller->GetRunningApplications();
}

BrowserShortcutLauncherItemController*
ChromeLauncherController::GetBrowserShortcutLauncherItemController() {
  for (IDToItemControllerMap::iterator i = id_to_item_controller_map_.begin();
      i != id_to_item_controller_map_.end(); ++i) {
    int index = model_->ItemIndexByID(i->first);
    const ash::ShelfItem& item = model_->items()[index];
    if (item.type == ash::TYPE_BROWSER_SHORTCUT)
      return static_cast<BrowserShortcutLauncherItemController*>(i->second);
  }
  // Create a LauncherItemController for the Browser shortcut if it does not
  // exist yet.
  ash::ShelfID id = CreateBrowserShortcutLauncherItem();
  DCHECK(id_to_item_controller_map_[id]);
  return static_cast<BrowserShortcutLauncherItemController*>(
      id_to_item_controller_map_[id]);
}

ash::ShelfID ChromeLauncherController::CreateBrowserShortcutLauncherItem() {
  ash::ShelfItem browser_shortcut;
  browser_shortcut.type = ash::TYPE_BROWSER_SHORTCUT;
  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
  browser_shortcut.image = *rb.GetImageSkiaNamed(IDR_PRODUCT_LOGO_32);
  ash::ShelfID id = model_->next_id();
  size_t index = GetChromeIconIndexForCreation();
  model_->AddAt(index, browser_shortcut);
  id_to_item_controller_map_[id] =
      new BrowserShortcutLauncherItemController(this);
  id_to_item_controller_map_[id]->set_shelf_id(id);
  // ShelfItemDelegateManager owns BrowserShortcutLauncherItemController.
  SetShelfItemDelegate(id, id_to_item_controller_map_[id]);
  return id;
}

void ChromeLauncherController::PersistChromeItemIndex(int index) {
  profile_->GetPrefs()->SetInteger(prefs::kShelfChromeIconIndex, index);
}

int ChromeLauncherController::GetChromeIconIndexFromPref() const {
  size_t index = profile_->GetPrefs()->GetInteger(prefs::kShelfChromeIconIndex);
  const base::ListValue* pinned_apps_pref =
      profile_->GetPrefs()->GetList(prefs::kPinnedLauncherApps);
  return std::max(static_cast<size_t>(0),
                  std::min(pinned_apps_pref->GetSize(), index));
}

void ChromeLauncherController::MoveChromeOrApplistToFinalPosition(
    bool is_chrome,
    bool is_app_list,
    int target_index,
    int* chrome_index,
    int* app_list_index) {
  if (is_chrome && *chrome_index != -1) {
    model_->Move(*chrome_index, target_index);
    if (*app_list_index != -1 &&
        *chrome_index < *app_list_index &&
        target_index > *app_list_index)
      --(*app_list_index);
    *chrome_index = -1;
  } else if (is_app_list && *app_list_index != -1) {
    model_->Move(*app_list_index, target_index);
    if (*chrome_index != -1 &&
        *app_list_index < *chrome_index &&
        target_index > *chrome_index)
      --(*chrome_index);
    *app_list_index = -1;
  }
}

int ChromeLauncherController::FindInsertionPoint(bool is_app_list) {
  bool alternate = ash::switches::UseAlternateShelfLayout();
  // Keeping this change small to backport to M33&32 (see crbug.com/329597).
  // TODO(skuhne): With the removal of the legacy shelf layout we should remove
  // the ability to move the app list item since this was never used. We should
  // instead ask the ShelfModel::ValidateInsertionIndex or similir for an index.
  if (is_app_list && alternate)
    return 0;

  for (int i = model_->item_count() - 1; i > 0; --i) {
    ash::ShelfItemType type = model_->items()[i].type;
    if (type == ash::TYPE_APP_SHORTCUT ||
        ((is_app_list || alternate) && type == ash::TYPE_APP_LIST) ||
        type == ash::TYPE_BROWSER_SHORTCUT) {
      return i;
    }
  }
  return 0;
}

int ChromeLauncherController::GetChromeIconIndexForCreation() {
  // We get the list of pinned apps as they currently would get pinned.
  // Within this list the chrome icon will be the correct location.
  std::vector<std::string> pinned_apps = GetListOfPinnedAppsAndBrowser();

  std::vector<std::string>::iterator it =
      std::find(pinned_apps.begin(),
                pinned_apps.end(),
                std::string(extension_misc::kChromeAppId));
  DCHECK(it != pinned_apps.end());
  int index = it - pinned_apps.begin();

  // We should do here a comparison between the is state and the "want to be"
  // state since some apps might be able to pin but are not yet. Instead - for
  // the time being we clamp against the amount of known items and wait for the
  // next |UpdateAppLaunchersFromPref()| call to correct it - it will come since
  // the pinning will be done then.
  return std::min(model_->item_count(), index);
}

std::vector<std::string>
ChromeLauncherController::GetListOfPinnedAppsAndBrowser() {
  // Adding the app list item to the list of items requires that the ID is not
  // a valid and known ID for the extension system. The ID was constructed that
  // way - but just to make sure...
  DCHECK(!app_tab_helper_->IsValidIDForCurrentUser(kAppShelfIdPlaceholder));

  std::vector<std::string> pinned_apps;

  // Get the new incarnation of the list.
  const base::ListValue* pinned_apps_pref =
      profile_->GetPrefs()->GetList(prefs::kPinnedLauncherApps);

  // Keep track of the addition of the chrome and the app list icon.
  bool chrome_icon_added = false;
  bool app_list_icon_added = false;
  size_t chrome_icon_index = GetChromeIconIndexFromPref();

  // See if the chrome string is already in the pinned list and remove it if
  // needed.
  base::Value* chrome_app = ash::CreateAppDict(extension_misc::kChromeAppId);
  if (chrome_app) {
    chrome_icon_added = pinned_apps_pref->Find(*chrome_app) !=
        pinned_apps_pref->end();
    delete chrome_app;
  }

  for (size_t index = 0; index < pinned_apps_pref->GetSize(); ++index) {
    // We need to position the chrome icon relative to it's place in the pinned
    // preference list - even if an item of that list isn't shown yet.
    if (index == chrome_icon_index && !chrome_icon_added) {
      pinned_apps.push_back(extension_misc::kChromeAppId);
      chrome_icon_added = true;
    }
    const base::DictionaryValue* app = NULL;
    std::string app_id;
    if (pinned_apps_pref->GetDictionary(index, &app) &&
        app->GetString(ash::kPinnedAppsPrefAppIDPath, &app_id) &&
        (std::find(pinned_apps.begin(), pinned_apps.end(), app_id) ==
             pinned_apps.end())) {
      if (app_id == extension_misc::kChromeAppId) {
        chrome_icon_added = true;
        pinned_apps.push_back(extension_misc::kChromeAppId);
      } else if (app_id == kAppShelfIdPlaceholder) {
        app_list_icon_added = true;
        pinned_apps.push_back(kAppShelfIdPlaceholder);
      } else if (app_tab_helper_->IsValidIDForCurrentUser(app_id)) {
        // Note: In multi profile scenarios we only want to show pinnable apps
        // here which is correct. Running applications from the other users will
        // continue to run. So no need for multi profile modifications.
        pinned_apps.push_back(app_id);
      }
    }
  }

  // If not added yet, the chrome item will be the last item in the list.
  if (!chrome_icon_added)
    pinned_apps.push_back(extension_misc::kChromeAppId);

  // If not added yet, add the app list item either at the end or at the
  // beginning - depending on the shelf layout.
  if (!app_list_icon_added) {
    if (ash::switches::UseAlternateShelfLayout())
      pinned_apps.insert(pinned_apps.begin(), kAppShelfIdPlaceholder);
    else
      pinned_apps.push_back(kAppShelfIdPlaceholder);
  }
  return pinned_apps;
}

bool ChromeLauncherController::IsIncognito(
    const content::WebContents* web_contents) const {
  const Profile* profile =
      Profile::FromBrowserContext(web_contents->GetBrowserContext());
  return profile->IsOffTheRecord() && !profile->IsGuestSession();
}

void ChromeLauncherController::CloseWindowedAppsFromRemovedExtension(
    const std::string& app_id) {
  // This function cannot rely on the controller's enumeration functionality
  // since the extension has already be unloaded.
  const BrowserList* ash_browser_list =
      BrowserList::GetInstance(chrome::HOST_DESKTOP_TYPE_ASH);
  std::vector<Browser*> browser_to_close;
  for (BrowserList::const_reverse_iterator
           it = ash_browser_list->begin_last_active();
       it != ash_browser_list->end_last_active(); ++it) {
    Browser* browser = *it;
    if (!browser->is_type_tabbed() &&
        browser->is_type_popup() &&
        browser->is_app() &&
        app_id == web_app::GetExtensionIdFromApplicationName(
            browser->app_name())) {
      browser_to_close.push_back(browser);
    }
  }
  while (!browser_to_close.empty()) {
    TabStripModel* tab_strip = browser_to_close.back()->tab_strip_model();
    tab_strip->CloseWebContentsAt(0, TabStripModel::CLOSE_NONE);
    browser_to_close.pop_back();
  }
}

void ChromeLauncherController::SetShelfItemDelegate(
    ash::ShelfID id,
    ash::ShelfItemDelegate* item_delegate) {
  DCHECK_GT(id, 0);
  DCHECK(item_delegate);
  DCHECK(item_delegate_manager_);
  item_delegate_manager_->SetShelfItemDelegate(
      id, scoped_ptr<ash::ShelfItemDelegate>(item_delegate).Pass());
}

void ChromeLauncherController::AttachProfile(Profile* profile) {
  profile_ = profile;
  // Either add the profile to the list of known profiles and make it the active
  // one for some functions of AppTabHelper or create a new one.
  if (!app_tab_helper_.get())
    app_tab_helper_.reset(new LauncherAppTabHelper(profile_));
  else
    app_tab_helper_->SetCurrentUser(profile_);
  // TODO(skuhne): The AppIconLoaderImpl has the same problem. Each loaded
  // image is associated with a profile (it's loader requires the profile).
  // Since icon size changes are possible, the icon could be requested to be
  // reloaded. However - having it not multi profile aware would cause problems
  // if the icon cache gets deleted upon user switch.
  app_icon_loader_.reset(new extensions::AppIconLoaderImpl(
      profile_, extension_misc::EXTENSION_ICON_SMALL, this));

  pref_change_registrar_.Init(profile_->GetPrefs());
  pref_change_registrar_.Add(
      prefs::kPinnedLauncherApps,
      base::Bind(&ChromeLauncherController::UpdateAppLaunchersFromPref,
                 base::Unretained(this)));
  pref_change_registrar_.Add(
      prefs::kShelfAlignmentLocal,
      base::Bind(&ChromeLauncherController::SetShelfAlignmentFromPrefs,
                 base::Unretained(this)));
  pref_change_registrar_.Add(
      prefs::kShelfAutoHideBehaviorLocal,
      base::Bind(&ChromeLauncherController::
                     SetShelfAutoHideBehaviorFromPrefs,
                 base::Unretained(this)));
  pref_change_registrar_.Add(
      prefs::kShelfPreferences,
      base::Bind(&ChromeLauncherController::SetShelfBehaviorsFromPrefs,
                 base::Unretained(this)));
}

void ChromeLauncherController::ReleaseProfile() {
  if (app_sync_ui_state_)
    app_sync_ui_state_->RemoveObserver(this);

  PrefServiceSyncable::FromProfile(profile_)->RemoveObserver(this);

  pref_change_registrar_.RemoveAll();
}