| // 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 UI_AURA_ENV_H_ |
| #define UI_AURA_ENV_H_ |
| |
| #include "base/memory/scoped_ptr.h" |
| #include "base/message_loop.h" |
| #include "base/observer_list.h" |
| #include "ui/aura/aura_export.h" |
| #include "ui/aura/client/stacking_client.h" |
| #include "ui/gfx/point.h" |
| |
| namespace aura { |
| class EnvObserver; |
| class EventFilter; |
| class DisplayManager; |
| class Window; |
| |
| namespace internal { |
| class DisplayChangeObserverX11; |
| } |
| |
| #if !defined(OS_MACOSX) |
| // Creates a platform-specific native event dispatcher. |
| MessageLoop::Dispatcher* CreateDispatcher(); |
| #endif |
| |
| // A singleton object that tracks general state within Aura. |
| // TODO(beng): manage RootWindows. |
| class AURA_EXPORT Env { |
| public: |
| Env(); |
| ~Env(); |
| |
| static Env* GetInstance(); |
| static void DeleteInstance(); |
| |
| void AddObserver(EnvObserver* observer); |
| void RemoveObserver(EnvObserver* observer); |
| |
| bool is_mouse_button_down() const { return mouse_button_flags_ != 0; } |
| void set_mouse_button_flags(int mouse_button_flags) { |
| mouse_button_flags_ = mouse_button_flags; |
| } |
| |
| // Gets/sets the last mouse location seen in a mouse event in the screen |
| // coordinates. |
| const gfx::Point& last_mouse_location() const { return last_mouse_location_; } |
| void SetLastMouseLocation(const Window& window, |
| const gfx::Point& location_in_root); |
| |
| // Whether any touch device is currently down. |
| bool is_touch_down() const { return is_touch_down_; } |
| void set_touch_down(bool value) { is_touch_down_ = value; } |
| |
| // Whether RenderWidgetHostViewAura::OnPaint() should paint white background |
| // when backing store is not present. Default is true. |
| // In some cases when page is using transparent background painting white |
| // background before backing store is initialized causes a white splash. |
| bool render_white_bg() const { return render_white_bg_; } |
| void set_render_white_bg(bool value) { render_white_bg_ = value; } |
| |
| client::StackingClient* stacking_client() { return stacking_client_; } |
| void set_stacking_client(client::StackingClient* stacking_client) { |
| stacking_client_ = stacking_client; |
| } |
| |
| // Gets/sets DisplayManager. The DisplayManager's ownership is |
| // transfered. |
| DisplayManager* display_manager() { return display_manager_.get(); } |
| void SetDisplayManager(DisplayManager* display_manager); |
| |
| // Env takes ownership of the EventFilter. |
| EventFilter* event_filter() { return event_filter_.get(); } |
| void SetEventFilter(EventFilter* event_filter); |
| |
| // Returns the native event dispatcher. The result should only be passed to |
| // base::RunLoop(dispatcher), or used to dispatch an event by |
| // |Dispatch(const NativeEvent&)| on it. It must never be stored. |
| #if !defined(OS_MACOSX) |
| MessageLoop::Dispatcher* GetDispatcher(); |
| #endif |
| |
| private: |
| friend class Window; |
| |
| void Init(); |
| |
| // Called by the Window when it is initialized. Notifies observers. |
| void NotifyWindowInitialized(Window* window); |
| |
| ObserverList<EnvObserver> observers_; |
| #if !defined(OS_MACOSX) |
| scoped_ptr<MessageLoop::Dispatcher> dispatcher_; |
| #endif |
| |
| static Env* instance_; |
| int mouse_button_flags_; |
| // Location of last mouse event, in screen coordinates. |
| gfx::Point last_mouse_location_; |
| bool is_touch_down_; |
| bool render_white_bg_; |
| client::StackingClient* stacking_client_; |
| scoped_ptr<DisplayManager> display_manager_; |
| scoped_ptr<EventFilter> event_filter_; |
| |
| #if defined(USE_X11) |
| scoped_ptr<internal::DisplayChangeObserverX11> display_change_observer_; |
| #endif |
| |
| DISALLOW_COPY_AND_ASSIGN(Env); |
| }; |
| |
| } // namespace aura |
| |
| #endif // UI_AURA_ENV_H_ |