ash/display/screen_ash.h

   1 // Copyright 2014 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_DISPLAY_SCREEN_ASH_H_
   6 #define ASH_DISPLAY_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/display_observer.h"
  12 #include "ui/gfx/screen.h"
  13
  14 namespace gfx {
  15 class Rect;
  16 }
  17
  18 namespace ash {
  19 namespace  internal {
  20 class DisplayManager;
  21 }
  22
  23 // Aura implementation of gfx::Screen. Implemented here to avoid circular
  24 // dependencies.
  25 class ASH_EXPORT ScreenAsh : public gfx::Screen {
  26  public:
  27   ScreenAsh();
  28   ~ScreenAsh() override;
  29
  30   // Finds the display that contains |point| in screeen coordinates.
  31   // Returns invalid display if there is no display that can satisfy
  32   // the condition.
  33   static gfx::Display FindDisplayContainingPoint(const gfx::Point& point);
  34
  35   // Returns the bounds for maximized windows in parent coordinates.
  36   // Maximized windows trigger auto-hiding the shelf.
  37   static gfx::Rect GetMaximizedWindowBoundsInParent(aura::Window* window);
  38
  39   // Returns the display bounds in parent coordinates.
  40   static gfx::Rect GetDisplayBoundsInParent(aura::Window* window);
  41
  42   // Returns the display's work area bounds in parent coordinates.
  43   static gfx::Rect GetDisplayWorkAreaBoundsInParent(aura::Window* window);
  44
  45   // Converts |rect| from |window|'s coordinates to the virtual screen
  46   // coordinates.
  47   static gfx::Rect ConvertRectToScreen(aura::Window* window,
  48                                        const gfx::Rect& rect);
  49
  50   // Converts |rect| from virtual screen coordinates to the |window|'s
  51   // coordinates.
  52   static gfx::Rect ConvertRectFromScreen(aura::Window* window,
  53                                          const gfx::Rect& rect);
  54
  55   // Returns a gfx::Display object for secondary display. Returns
  56   // invalid display if there is no secondary display connected.
  57   static const gfx::Display& GetSecondaryDisplay();
  58
  59   // Returns a gfx::Display object for the specified id.  Returns
  60   // invalid display if no such display is connected.
  61   static const gfx::Display& GetDisplayForId(int64 display_id);
  62
  63   // gfx::Screen overrides:
  64   gfx::Point GetCursorScreenPoint() override;
  65   gfx::NativeWindow GetWindowUnderCursor() override;
  66   gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) override;
  67   int GetNumDisplays() const override;
  68   std::vector<gfx::Display> GetAllDisplays() const override;
  69   gfx::Display GetDisplayNearestWindow(gfx::NativeView view) const override;
  70   gfx::Display GetDisplayNearestPoint(const gfx::Point& point) const override;
  71   gfx::Display GetDisplayMatching(const gfx::Rect& match_rect) const override;
  72   gfx::Display GetPrimaryDisplay() const override;
  73   void AddObserver(gfx::DisplayObserver* observer) override;
  74   void RemoveObserver(gfx::DisplayObserver* observer) override;
  75
  76  private:
  77   friend class DisplayManager;
  78
  79   // Notifies observers of display configuration changes.
  80   void NotifyMetricsChanged(const gfx::Display& display, uint32_t metrics);
  81   void NotifyDisplayAdded(const gfx::Display& display);
  82   void NotifyDisplayRemoved(const gfx::Display& display);
  83
  84   // Creates a screen that can be used during shutdown.
  85   // It simply has a copy of the displays.
  86   gfx::Screen* CloneForShutdown();
  87
  88   ObserverList<gfx::DisplayObserver> observers_;
  89
  90   DISALLOW_COPY_AND_ASSIGN(ScreenAsh);
  91 };
  92
  93 }  // namespace ash
  94
  95 #endif  // ASH_DISPLAY_SCREEN_ASH_H_