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 gfx::Point GetCursorScreenPoint() override;
  35   virtual gfx::NativeWindow GetWindowUnderCursor() override;
  36   virtual gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point)
  37       override;
  38   virtual int GetNumDisplays() const override;
  39   virtual std::vector<gfx::Display> GetAllDisplays() const override;
  40   virtual gfx::Display GetDisplayNearestWindow(
  41       gfx::NativeView window) const override;
  42   virtual gfx::Display GetDisplayNearestPoint(
  43       const gfx::Point& point) const override;
  44   virtual gfx::Display GetDisplayMatching(
  45       const gfx::Rect& match_rect) const override;
  46   virtual gfx::Display GetPrimaryDisplay() const override;
  47   virtual void AddObserver(gfx::DisplayObserver* observer) override;
  48   virtual void RemoveObserver(gfx::DisplayObserver* observer) override;
  49
  50   // ui::PlatformEventDispatcher:
  51   virtual bool CanDispatchEvent(const ui::PlatformEvent& event) override;
  52   virtual uint32_t DispatchEvent(const ui::PlatformEvent& event) override;
  53
  54  private:
  55   friend class DesktopScreenX11Test;
  56
  57   // Constructor used in tests.
  58   DesktopScreenX11(const std::vector<gfx::Display>& test_displays);
  59
  60   // Builds a list of displays from the current screen information offered by
  61   // the X server.
  62   std::vector<gfx::Display> BuildDisplaysFromXRandRInfo();
  63
  64   // We delay updating the display so we can coalesce events.
  65   void ConfigureTimerFired();
  66
  67   Display* xdisplay_;
  68   ::Window x_root_window_;
  69
  70   // Whether the x server supports the XRandR extension.
  71   bool has_xrandr_;
  72
  73   // The base of the event numbers used to represent XRandr events used in
  74   // decoding events regarding output add/remove.
  75   int xrandr_event_base_;
  76
  77   // The display objects we present to chrome.
  78   std::vector<gfx::Display> displays_;
  79
  80   // The timer to delay configuring outputs. See also the comments in
  81   // Dispatch().
  82   scoped_ptr<base::OneShotTimer<DesktopScreenX11> > configure_timer_;
  83
  84   gfx::DisplayChangeNotifier change_notifier_;
  85
  86   DISALLOW_COPY_AND_ASSIGN(DesktopScreenX11);
  87 };
  88
  89 }  // namespace views
  90
  91 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_SCREEN_X11_H_