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// 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.
#ifndef ASH_SHELL_H_
#define ASH_SHELL_H_
#include <utility>
#include <vector>
#include "ash/ash_export.h"
#include "ash/system/user/login_status.h"
#include "ash/wm/cursor_delegate.h"
#include "ash/wm/cursor_manager.h"
#include "ash/wm/shelf_types.h"
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/gtest_prod_util.h"
#include "base/memory/scoped_ptr.h"
#include "base/observer_list.h"
#include "ui/gfx/insets.h"
#include "ui/gfx/size.h"
class CommandLine;
namespace aura {
class EventFilter;
class FocusManager;
class RootWindow;
class Window;
namespace client {
class UserActionClient;
namespace shared {
class CompoundEventFilter;
class InputMethodEventFilter;
namespace chromeos {
class OutputConfigurator;
namespace content {
class BrowserContext;
namespace gfx {
class ImageSkia;
class Point;
class Rect;
namespace ui {
class Layer;
namespace views {
class NonClientFrameView;
class Widget;
namespace ash {
class AcceleratorController;
class DesktopBackgroundController;
class HighContrastController;
class Launcher;
class NestedDispatcherController;
class PowerButtonController;
class ScreenAsh;
class ShellDelegate;
class ShellObserver;
class SystemTrayDelegate;
class SystemTray;
class UserActivityDetector;
class UserWallpaperDelegate;
class VideoDetector;
class WindowCycleController;
namespace internal {
class AcceleratorFilter;
class ActivationController;
class AppListController;
class CaptureController;
class DisplayController;
class DragDropController;
class EventRewriterEventFilter;
class FocusCycler;
class MagnificationController;
class MouseCursorEventFilter;
class OverlayEventFilter;
class PanelLayoutManager;
class ResizeShadowController;
class RootWindowController;
class RootWindowLayoutManager;
class ScreenPositionController;
class ShadowController;
class ShelfLayoutManager;
class ShellContextMenu;
class SlowAnimationEventFilter;
class StackingController;
class StatusAreaWidget;
class SystemGestureEventFilter;
class TooltipController;
class TouchObserverHUD;
class VisibilityController;
class WindowModalityController;
class WorkspaceController;
// Shell is a singleton object that presents the Shell API and implements the
// RootWindow's delegate interface.
// Upon creation, the Shell sets itself as the RootWindow's delegate, which
// takes ownership of the Shell.
class ASH_EXPORT Shell : ash::CursorDelegate {
typedef std::vector<aura::RootWindow*> RootWindowList;
typedef std::vector<internal::RootWindowController*> RootWindowControllerList;
enum Direction {
// Accesses private data from a Shell for testing.
class ASH_EXPORT TestApi {
explicit TestApi(Shell* shell);
internal::RootWindowLayoutManager* root_window_layout();
aura::shared::InputMethodEventFilter* input_method_event_filter();
internal::SystemGestureEventFilter* system_gesture_event_filter();
internal::WorkspaceController* workspace_controller();
Shell* shell_; // not owned
// A shell must be explicitly created so that it can call |Init()| with the
// delegate set. |delegate| can be NULL (if not required for initialization).
static Shell* CreateInstance(ShellDelegate* delegate);
// Should never be called before |CreateInstance()|.
static Shell* GetInstance();
// Returns true if the ash shell has been instantiated.
static bool HasInstance();
static void DeleteInstance();
// Returns the root window controller for the primary root window.
static internal::RootWindowController* GetPrimaryRootWindowController();
// Returns all root window controllers. In non extended desktop
// mode, this return a RootWindowController for the primary root window only.
static RootWindowControllerList GetAllRootWindowControllers();
// Returns the primary RootWindow. The primary RootWindow is the one
// that has a launcher.
static aura::RootWindow* GetPrimaryRootWindow();
// Returns the active RootWindow. The active RootWindow is the one that
// contains the current active window as a decendant child. The active
// RootWindow remains the same even when the active window becomes NULL,
// until the another window who has a different root window becomes active.
static aura::RootWindow* GetActiveRootWindow();
// Returns the RootWindow at |point| in the virtual screen coordinates.
// Returns NULL if the root window does not exist at the given
// point.
static aura::RootWindow* GetRootWindowAt(const gfx::Point& point);
// Returns the RootWindow that shares the most area with |rect| in
// the virtual scren coordinates.
static aura::RootWindow* GetRootWindowMatching(const gfx::Rect& rect);
// Returns all root windows. In non extended desktop mode, this
// returns the primary root window only.
static RootWindowList GetAllRootWindows();
static aura::Window* GetContainer(aura::RootWindow* root_window,
int container_id);
// Returns the list of containers that match |container_id| in
// all root windows.
static std::vector<aura::Window*> GetAllContainers(int container_id);
void set_active_root_window(aura::RootWindow* active_root_window) {
active_root_window_ = active_root_window;
// Adds or removes |filter| from the aura::Env's CompoundEventFilter.
void AddEnvEventFilter(aura::EventFilter* filter);
void RemoveEnvEventFilter(aura::EventFilter* filter);
size_t GetEnvEventFilterCount() const;
// Shows the background menu over |widget|.
void ShowBackgroundMenu(views::Widget* widget, const gfx::Point& location);
// Toggles app list.
void ToggleAppList();
// Returns app list target visibility.
bool GetAppListTargetVisibility() const;
// Returns app list window or NULL if it is not visible.
aura::Window* GetAppListWindow();
// Returns true if the screen is locked.
bool IsScreenLocked() const;
// Returns true if a modal dialog window is currently open.
bool IsModalWindowOpen() const;
// Creates a default views::NonClientFrameView for use by windows in the
// Ash environment.
views::NonClientFrameView* CreateDefaultNonClientFrameView(
views::Widget* widget);
// Rotates focus through containers that can receive focus.
void RotateFocus(Direction direction);
// Sets the work area insets of the display that contains |window|,
// this notifies observers too.
// TODO(sky): this no longer really replicates what happens and is unreliable.
// Remove this.
void SetDisplayWorkAreaInsets(aura::Window* window,
const gfx::Insets& insets);
// Called when the user logs in.
void OnLoginStateChanged(user::LoginStatus status);
// Called when the application is exiting.
void OnAppTerminating();
// Called when the screen is locked (after the lock window is visible) or
// unlocked.
void OnLockStateChanged(bool locked);
// Initializes |launcher_|. Does nothing if it's already initialized.
void CreateLauncher();
// Show launcher view if it was created hidden (before session has started).
void ShowLauncher();
// Adds/removes observer.
void AddShellObserver(ShellObserver* observer);
void RemoveShellObserver(ShellObserver* observer);
#if !defined(OS_MACOSX)
AcceleratorController* accelerator_controller() {
return accelerator_controller_.get();
#endif // !defined(OS_MACOSX)
aura::shared::CompoundEventFilter* env_filter() {
return env_filter_;
internal::TooltipController* tooltip_controller() {
return tooltip_controller_.get();
internal::EventRewriterEventFilter* event_rewriter_filter() {
return event_rewriter_filter_.get();
internal::OverlayEventFilter* overlay_filter() {
return overlay_filter_.get();
DesktopBackgroundController* desktop_background_controller() {
return desktop_background_controller_.get();
PowerButtonController* power_button_controller() {
return power_button_controller_.get();
UserActivityDetector* user_activity_detector() {
return user_activity_detector_.get();
VideoDetector* video_detector() {
return video_detector_.get();
WindowCycleController* window_cycle_controller() {
return window_cycle_controller_.get();
internal::FocusCycler* focus_cycler() {
return focus_cycler_.get();
internal::DisplayController* display_controller() {
return display_controller_.get();
CursorManager* cursor_manager() { return &cursor_manager_; }
ShellDelegate* delegate() { return delegate_.get(); }
UserWallpaperDelegate* user_wallpaper_delegate() {
return user_wallpaper_delegate_.get();
HighContrastController* high_contrast_controller() {
return high_contrast_controller_.get();
internal::MagnificationController* magnification_controller() {
return magnification_controller_.get();
Launcher* launcher() { return launcher_.get(); }
const ScreenAsh* screen() { return screen_; }
// Force the shelf to query for it's current visibility state.
void UpdateShelfVisibility();
// Sets/gets the shelf auto-hide behavior.
void SetShelfAutoHideBehavior(ShelfAutoHideBehavior behavior);
ShelfAutoHideBehavior GetShelfAutoHideBehavior() const;
void SetShelfAlignment(ShelfAlignment alignment);
ShelfAlignment GetShelfAlignment();
// Dims or undims the screen.
void SetDimming(bool should_dim);
// TODO(sky): don't expose this!
internal::ShelfLayoutManager* shelf() const { return shelf_; }
internal::StatusAreaWidget* status_area_widget() const {
return status_area_widget_;
// Convenience accessor for members of StatusAreaWidget.
SystemTrayDelegate* tray_delegate();
SystemTray* system_tray();
// Returns the size of the grid.
int GetGridSize() const;
static void set_initially_hide_cursor(bool hide) {
initially_hide_cursor_ = hide;
internal::ResizeShadowController* resize_shadow_controller() {
return resize_shadow_controller_.get();
// Made available for tests.
internal::ShadowController* shadow_controller() {
return shadow_controller_.get();
content::BrowserContext* browser_context() { return browser_context_; }
void set_browser_context(content::BrowserContext* browser_context) {
browser_context_ = browser_context;
// Initializes the root window to be used for a secondary display.
void InitRootWindowForSecondaryDisplay(aura::RootWindow* root);
#if defined(OS_CHROMEOS)
chromeos::OutputConfigurator* output_configurator() {
return output_configurator_.get();
#endif // defined(OS_CHROMEOS)
FRIEND_TEST_ALL_PREFIXES(ExtendedDesktopTest, TestCursor);
FRIEND_TEST_ALL_PREFIXES(WindowManagerTest, MouseEventCursors);
FRIEND_TEST_ALL_PREFIXES(WindowManagerTest, TransformActivate);
friend class internal::RootWindowController;
typedef std::pair<aura::Window*, gfx::Rect> WindowAndBoundsPair;
explicit Shell(ShellDelegate* delegate);
virtual ~Shell();
void Init();
// Initializes the root window and root window controller so that it
// can host browser windows.
void InitRootWindowController(internal::RootWindowController* root);
// Initializes the layout managers and event filters specific for
// primary display.
void InitLayoutManagersForPrimaryDisplay(
internal::RootWindowController* root_window_controller);
// Disables the workspace grid layout.
void DisableWorkspaceGridLayout();
// aura::CursorManager::Delegate overrides:
virtual void SetCursor(gfx::NativeCursor cursor) OVERRIDE;
virtual void ShowCursor(bool visible) OVERRIDE;
static Shell* instance_;
// If set before the Shell is initialized, the mouse cursor will be hidden
// when the screen is initially created.
static bool initially_hide_cursor_;
ScreenAsh* screen_;
// Active root window. Never becomes NULL during the session.
aura::RootWindow* active_root_window_;
// The CompoundEventFilter owned by aura::Env object.
aura::shared::CompoundEventFilter* env_filter_;
std::vector<WindowAndBoundsPair> to_restore_;
#if !defined(OS_MACOSX)
scoped_ptr<NestedDispatcherController> nested_dispatcher_controller_;
scoped_ptr<AcceleratorController> accelerator_controller_;
#endif // !defined(OS_MACOSX)
scoped_ptr<ShellDelegate> delegate_;
scoped_ptr<UserWallpaperDelegate> user_wallpaper_delegate_;
scoped_ptr<Launcher> launcher_;
scoped_ptr<internal::AppListController> app_list_controller_;
scoped_ptr<internal::ShellContextMenu> shell_context_menu_;
scoped_ptr<internal::StackingController> stacking_controller_;
scoped_ptr<internal::ActivationController> activation_controller_;
scoped_ptr<internal::CaptureController> capture_controller_;
scoped_ptr<internal::WindowModalityController> window_modality_controller_;
scoped_ptr<internal::DragDropController> drag_drop_controller_;
scoped_ptr<internal::ResizeShadowController> resize_shadow_controller_;
scoped_ptr<internal::ShadowController> shadow_controller_;
scoped_ptr<internal::TooltipController> tooltip_controller_;
scoped_ptr<internal::VisibilityController> visibility_controller_;
scoped_ptr<DesktopBackgroundController> desktop_background_controller_;
scoped_ptr<PowerButtonController> power_button_controller_;
scoped_ptr<UserActivityDetector> user_activity_detector_;
scoped_ptr<VideoDetector> video_detector_;
scoped_ptr<WindowCycleController> window_cycle_controller_;
scoped_ptr<internal::FocusCycler> focus_cycler_;
scoped_ptr<internal::DisplayController> display_controller_;
scoped_ptr<HighContrastController> high_contrast_controller_;
scoped_ptr<internal::MagnificationController> magnification_controller_;
scoped_ptr<aura::FocusManager> focus_manager_;
scoped_ptr<aura::client::UserActionClient> user_action_client_;
scoped_ptr<internal::MouseCursorEventFilter> mouse_cursor_filter_;
scoped_ptr<internal::ScreenPositionController> screen_position_controller_;
// An event filter that rewrites or drops an event.
scoped_ptr<internal::EventRewriterEventFilter> event_rewriter_filter_;
// An event filter that pre-handles key events while the partial
// screenshot UI is active.
scoped_ptr<internal::OverlayEventFilter> overlay_filter_;
// An event filter which handles system level gestures
scoped_ptr<internal::SystemGestureEventFilter> system_gesture_filter_;
#if !defined(OS_MACOSX)
// An event filter that pre-handles global accelerators.
scoped_ptr<internal::AcceleratorFilter> accelerator_filter_;
// An event filter that pre-handles all key events to send them to an IME.
scoped_ptr<aura::shared::InputMethodEventFilter> input_method_filter_;
// An event filter that silently keeps track of all touch events and controls
// a heads-up display. This is enabled only if --ash-touch-hud flag is used.
scoped_ptr<internal::TouchObserverHUD> touch_observer_hud_;
#if defined(OS_CHROMEOS)
// Controls video output device state.
scoped_ptr<chromeos::OutputConfigurator> output_configurator_;
#endif // defined(OS_CHROMEOS)
CursorManager cursor_manager_;
// The shelf for managing the launcher and the status widget in non-compact
// mode. Shell does not own the shelf. Instead, it is owned by container of
// the status area.
internal::ShelfLayoutManager* shelf_;
// Manages layout of panels. Owned by PanelContainer.
internal::PanelLayoutManager* panel_layout_manager_;
ObserverList<ShellObserver> observers_;
// Widget containing system tray.
internal::StatusAreaWidget* status_area_widget_;
// Used by ash/shell.
content::BrowserContext* browser_context_;
} // namespace ash
#endif // ASH_SHELL_H_