ui/views/widget/desktop_aura/desktop_screen_x11.h

   1 // Copyright (c) 2013 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 UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_SCREEN_X11_H_
   6 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_SCREEN_X11_H_
   7
   8 #include "base/timer/timer.h"
   9 #include "ui/events/platform/platform_event_dispatcher.h"
  10 #include "ui/gfx/display_change_notifier.h"
  11 #include "ui/gfx/screen.h"
  12 #include "ui/views/views_export.h"
  13
  14 namespace gfx {
  15 class Display;
  16 }
  17
  18 typedef unsigned long XID;
  19 typedef XID Window;
  20 typedef struct _XDisplay Display;
  21
  22 namespace views {
  23 class DesktopScreenX11Test;
  24
  25 // Our singleton screen implementation that talks to xrandr.
  26 class VIEWS_EXPORT DesktopScreenX11 : public gfx::Screen,
  27                                       public ui::PlatformEventDispatcher {
  28  public:
  29   DesktopScreenX11();
  30
  31   virtual ~DesktopScreenX11();
  32
  33   // Overridden from gfx::Screen:
  34   virtual bool IsDIPEnabled() OVERRIDE;
  35   virtual gfx::Point GetCursorScreenPoint() OVERRIDE;
  36   virtual gfx::NativeWindow GetWindowUnderCursor() OVERRIDE;
  37   virtual gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point)
  38       OVERRIDE;
  39   virtual int GetNumDisplays() const OVERRIDE;
  40   virtual std::vector<gfx::Display> GetAllDisplays() const OVERRIDE;
  41   virtual gfx::Display GetDisplayNearestWindow(
  42       gfx::NativeView window) const OVERRIDE;
  43   virtual gfx::Display GetDisplayNearestPoint(
  44       const gfx::Point& point) const OVERRIDE;
  45   virtual gfx::Display GetDisplayMatching(
  46       const gfx::Rect& match_rect) const OVERRIDE;
  47   virtual gfx::Display GetPrimaryDisplay() const OVERRIDE;
  48   virtual void AddObserver(gfx::DisplayObserver* observer) OVERRIDE;
  49   virtual void RemoveObserver(gfx::DisplayObserver* observer) OVERRIDE;
  50
  51   // ui::PlatformEventDispatcher:
  52   virtual bool CanDispatchEvent(const ui::PlatformEvent& event) OVERRIDE;
  53   virtual uint32_t DispatchEvent(const ui::PlatformEvent& event) OVERRIDE;
  54
  55  private:
  56   friend class DesktopScreenX11Test;
  57
  58   // Constructor used in tests.
  59   DesktopScreenX11(const std::vector<gfx::Display>& test_displays);
  60
  61   // Builds a list of displays from the current screen information offered by
  62   // the X server.
  63   std::vector<gfx::Display> BuildDisplaysFromXRandRInfo();
  64
  65   // We delay updating the display so we can coalesce events.
  66   void ConfigureTimerFired();
  67
  68   Display* xdisplay_;
  69   ::Window x_root_window_;
  70
  71   // Whether the x server supports the XRandR extension.
  72   bool has_xrandr_;
  73
  74   // The base of the event numbers used to represent XRandr events used in
  75   // decoding events regarding output add/remove.
  76   int xrandr_event_base_;
  77
  78   // The display objects we present to chrome.
  79   std::vector<gfx::Display> displays_;
  80
  81   // The timer to delay configuring outputs. See also the comments in
  82   // Dispatch().
  83   scoped_ptr<base::OneShotTimer<DesktopScreenX11> > configure_timer_;
  84
  85   gfx::DisplayChangeNotifier change_notifier_;
  86
  87   DISALLOW_COPY_AND_ASSIGN(DesktopScreenX11);
  88 };
  89
  90 }  // namespace views
  91
  92 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_SCREEN_X11_H_