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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.
#include <stdint.h>
#include <map>
#include <memory>
#include <vector>
#include "ash/ash_export.h"
#include "ash/display/display_manager.h"
#include "base/compiler_specific.h"
#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/time/time.h"
#include "ui/aura/window.h"
#include "ui/aura/window_tree_host_observer.h"
#include "ui/base/ime/input_method.h"
#include "ui/base/ime/input_method_delegate.h"
#include "ui/display/display_observer.h"
#include "ui/gfx/geometry/point.h"
namespace aura {
class WindowTreeHost;
namespace base {
class Value;
template <typename T>
class JSONValueConverter;
namespace gfx {
class Insets;
namespace ash {
class AshWindowTreeHost;
struct AshWindowTreeHostInitParams;
class CursorWindowController;
class DisplayInfo;
class DisplayManager;
class FocusActivationStore;
class InputMethodEventHandler;
class MirrorWindowController;
class RootWindowController;
// WindowTreeHostManager owns and maintains RootWindows for each attached
// display, keeping them in sync with display configuration changes.
class ASH_EXPORT WindowTreeHostManager
: public display::DisplayObserver,
public aura::WindowTreeHostObserver,
public DisplayManager::Delegate,
public ui::internal::InputMethodDelegate {
// TODO(oshima): Consider moving this to display::DisplayObserver.
class ASH_EXPORT Observer {
// Invoked only once after all displays are initialized
// after startup.
virtual void OnDisplaysInitialized() {}
// Invoked when the display configuration change is requested,
// but before the change is applied to aura/ash.
virtual void OnDisplayConfigurationChanging() {}
// Invoked when the all display configuration changes
// have been applied.
virtual void OnDisplayConfigurationChanged() {}
// Invoked in WindowTreeHostManager::Shutdown().
virtual void OnWindowTreeHostManagerShutdown() {}
virtual ~Observer() {}
~WindowTreeHostManager() override;
void Start();
void Shutdown();
// Returns primary display's ID.
// TODO(oshima): Move this out from WindowTreeHostManager;
static int64_t GetPrimaryDisplayId();
CursorWindowController* cursor_window_controller() {
return cursor_window_controller_.get();
MirrorWindowController* mirror_window_controller() {
return mirror_window_controller_.get();
// Create a WindowTreeHost for the primary display. This replaces
// |initial_bounds| in |init_params|.
void CreatePrimaryHost(const AshWindowTreeHostInitParams& init_params);
// Initializes all WindowTreeHosts.
void InitHosts();
// Add/Remove observers.
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
// Returns the root window for primary display.
aura::Window* GetPrimaryRootWindow();
// Returns the root window for |display_id|.
aura::Window* GetRootWindowForDisplayId(int64_t id);
// Returns AshWTH for given display |id|. Call results in CHECK failure
// if the WTH does not exist.
AshWindowTreeHost* GetAshWindowTreeHostForDisplayId(int64_t id);
// Sets the primary display by display id. This re-assigns the current primary
// root window host to to new primary display.
void SetPrimaryDisplayId(int64_t id);
// Closes all child windows in the all root windows.
void CloseChildWindows();
// Returns all root windows. In non extended desktop mode, this
// returns the primary root window only.
aura::Window::Windows GetAllRootWindows();
// Returns all oot window controllers. In non extended desktop
// mode, this return a RootWindowController for the primary root window only.
std::vector<RootWindowController*> GetAllRootWindowControllers();
// Gets/Sets/Clears the overscan insets for the specified |display_id|. See
// display_manager.h for the details.
gfx::Insets GetOverscanInsets(int64_t display_id) const;
void SetOverscanInsets(int64_t display_id, const gfx::Insets& insets_in_dip);
// Checks if the mouse pointer is on one of displays, and moves to
// the center of the nearest display if it's outside of all displays.
void UpdateMouseLocationAfterDisplayChange();
// Sets the work area's |insets| to the display assigned to |window|.
bool UpdateWorkAreaOfDisplayNearestWindow(const aura::Window* window,
const gfx::Insets& insets);
ui::InputMethod* input_method() { return input_method_.get(); }
// display::DisplayObserver overrides:
void OnDisplayAdded(const display::Display& display) override;
void OnDisplayRemoved(const display::Display& display) override;
void OnDisplayMetricsChanged(const display::Display& display,
uint32_t metrics) override;
// aura::WindowTreeHostObserver overrides:
void OnHostResized(const aura::WindowTreeHost* host) override;
// aura::DisplayManager::Delegate overrides:
void CreateOrUpdateMirroringDisplay(
const DisplayInfoList& info_list) override;
void CloseMirroringDisplayIfNotNecessary() override;
void PreDisplayConfigurationChange(bool clear_focus) override;
void PostDisplayConfigurationChange() override;
// ui::internal::InputMethodDelegate overrides:
ui::EventDispatchDetails DispatchKeyEventPostIME(
ui::KeyEvent* event) override;
InputMethodEventHandler* input_method_event_handler() {
return input_method_event_handler_.get();
FRIEND_TEST_ALL_PREFIXES(WindowTreeHostManagerTest, BoundsUpdated);
FRIEND_TEST_ALL_PREFIXES(WindowTreeHostManagerTest, SecondaryDisplayLayout);
friend class DisplayManager;
friend class MirrorWindowController;
// Creates a WindowTreeHost for |display| and stores it in the
// |window_tree_hosts_| map.
AshWindowTreeHost* AddWindowTreeHostForDisplay(
const display::Display& display,
const AshWindowTreeHostInitParams& params);
// Delete the AsWindowTreeHost. This does not remove the entry from
// |window_tree_hosts_|. Caller has to explicitly remove it.
void DeleteHost(AshWindowTreeHost* host_to_delete);
typedef std::map<int64_t, AshWindowTreeHost*> WindowTreeHostMap;
// The mapping from display ID to its window tree host.
WindowTreeHostMap window_tree_hosts_;
base::ObserverList<Observer, true> observers_;
// Store the primary window tree host temporarily while replacing
// display.
AshWindowTreeHost* primary_tree_host_for_replace_;
std::unique_ptr<FocusActivationStore> focus_activation_store_;
std::unique_ptr<CursorWindowController> cursor_window_controller_;
std::unique_ptr<MirrorWindowController> mirror_window_controller_;
std::unique_ptr<ui::InputMethod> input_method_;
std::unique_ptr<InputMethodEventHandler> input_method_event_handler_;
// Stores the current cursor location (in native coordinates and screen
// coordinates respectively). The locations are used to restore the cursor
// location when the display configuration changes and to determine whether
// the mouse should be moved after a display configuration change.
gfx::Point cursor_location_in_native_coords_for_restore_;
gfx::Point cursor_location_in_screen_coords_for_restore_;
// Stores the cursor's display. The id is used to determine whether the mouse
// should be moved after a display configuration change.
int64_t cursor_display_id_for_restore_;
base::WeakPtrFactory<WindowTreeHostManager> weak_ptr_factory_;
} // namespace ash