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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef ASH_SCREEN_ASH_H_
      6 #define ASH_SCREEN_ASH_H_
      7 
      8 #include "ash/ash_export.h"
      9 #include "base/compiler_specific.h"
     10 #include "base/observer_list.h"
     11 #include "ui/gfx/screen.h"
     12 
     13 namespace gfx {
     14 class Rect;
     15 }
     16 
     17 namespace ash {
     18 
     19 // Aura implementation of gfx::Screen. Implemented here to avoid circular
     20 // dependencies.
     21 class ASH_EXPORT ScreenAsh : public gfx::Screen {
     22  public:
     23   ScreenAsh();
     24   virtual ~ScreenAsh();
     25 
     26   // Finds the display that contains |point| in screeen coordinates.
     27   // Returns invalid display if there is no display that can satisfy
     28   // the condition.
     29   static gfx::Display FindDisplayContainingPoint(const gfx::Point& point);
     30 
     31   // Returns the bounds for maximized windows in parent coordinates.
     32   // Maximized windows trigger auto-hiding the shelf.
     33   static gfx::Rect GetMaximizedWindowBoundsInParent(aura::Window* window);
     34 
     35   // Returns the display bounds in parent coordinates.
     36   static gfx::Rect GetDisplayBoundsInParent(aura::Window* window);
     37 
     38   // Returns the display's work area bounds in parent coordinates.
     39   static gfx::Rect GetDisplayWorkAreaBoundsInParent(aura::Window* window);
     40 
     41   // Converts |rect| from |window|'s coordinates to the virtual screen
     42   // coordinates.
     43   static gfx::Rect ConvertRectToScreen(aura::Window* window,
     44                                        const gfx::Rect& rect);
     45 
     46   // Converts |rect| from virtual screen coordinates to the |window|'s
     47   // coordinates.
     48   static gfx::Rect ConvertRectFromScreen(aura::Window* window,
     49                                          const gfx::Rect& rect);
     50 
     51   // Returns a gfx::Display object for secondary display. Returns
     52   // invalid display if there is no secondary display connected.
     53   static const gfx::Display& GetSecondaryDisplay();
     54 
     55   // Returns a gfx::Display object for the specified id.  Returns
     56   // invalid display if no such display is connected.
     57   static const gfx::Display& GetDisplayForId(int64 display_id);
     58 
     59   // Notifies observers of display configuration changes.
     60   void NotifyBoundsChanged(const gfx::Display& display);
     61   void NotifyDisplayAdded(const gfx::Display& display);
     62   void NotifyDisplayRemoved(const gfx::Display& display);
     63 
     64  protected:
     65   // gfx::Screen overrides:
     66   virtual bool IsDIPEnabled() OVERRIDE;
     67   virtual gfx::Point GetCursorScreenPoint() OVERRIDE;
     68   virtual gfx::NativeWindow GetWindowAtCursorScreenPoint() OVERRIDE;
     69   virtual int GetNumDisplays() OVERRIDE;
     70   virtual gfx::Display GetDisplayNearestWindow(
     71       gfx::NativeView view) const OVERRIDE;
     72   virtual gfx::Display GetDisplayNearestPoint(
     73       const gfx::Point& point) const OVERRIDE;
     74   virtual gfx::Display GetDisplayMatching(
     75       const gfx::Rect& match_rect) const OVERRIDE;
     76   virtual gfx::Display GetPrimaryDisplay() const OVERRIDE;
     77   virtual void AddObserver(gfx::DisplayObserver* observer) OVERRIDE;
     78   virtual void RemoveObserver(gfx::DisplayObserver* observer) OVERRIDE;
     79 
     80  private:
     81   ObserverList<gfx::DisplayObserver> observers_;
     82 
     83   DISALLOW_COPY_AND_ASSIGN(ScreenAsh);
     84 };
     85 
     86 }  // namespace ash
     87 
     88 #endif  // ASH_SCREEN_ASH_H_
     89