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/observer_list.h" 9 #include "base/timer/timer.h" 10 #include "ui/events/platform/platform_event_dispatcher.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 // Takes a set of displays and dispatches the screen change events to 34 // listeners. Exposed for testing. 35 void ProcessDisplayChange(const std::vector<gfx::Display>& displays); 36 37 // Overridden from gfx::Screen: 38 virtual bool IsDIPEnabled() OVERRIDE; 39 virtual gfx::Point GetCursorScreenPoint() OVERRIDE; 40 virtual gfx::NativeWindow GetWindowUnderCursor() OVERRIDE; 41 virtual gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) 42 OVERRIDE; 43 virtual int GetNumDisplays() const OVERRIDE; 44 virtual std::vector<gfx::Display> GetAllDisplays() const OVERRIDE; 45 virtual gfx::Display GetDisplayNearestWindow( 46 gfx::NativeView window) const OVERRIDE; 47 virtual gfx::Display GetDisplayNearestPoint( 48 const gfx::Point& point) const OVERRIDE; 49 virtual gfx::Display GetDisplayMatching( 50 const gfx::Rect& match_rect) const OVERRIDE; 51 virtual gfx::Display GetPrimaryDisplay() const OVERRIDE; 52 virtual void AddObserver(gfx::DisplayObserver* observer) OVERRIDE; 53 virtual void RemoveObserver(gfx::DisplayObserver* observer) OVERRIDE; 54 55 // ui::PlatformEventDispatcher: 56 virtual bool CanDispatchEvent(const ui::PlatformEvent& event) OVERRIDE; 57 virtual uint32_t DispatchEvent(const ui::PlatformEvent& event) OVERRIDE; 58 59 private: 60 friend class DesktopScreenX11Test; 61 62 // Constructor used in tests. 63 DesktopScreenX11(const std::vector<gfx::Display>& test_displays); 64 65 // Builds a list of displays from the current screen information offered by 66 // the X server. 67 std::vector<gfx::Display> BuildDisplaysFromXRandRInfo(); 68 69 // We delay updating the display so we can coalesce events. 70 void ConfigureTimerFired(); 71 72 Display* xdisplay_; 73 ::Window x_root_window_; 74 75 // Whether the x server supports the XRandR extension. 76 bool has_xrandr_; 77 78 // The base of the event numbers used to represent XRandr events used in 79 // decoding events regarding output add/remove. 80 int xrandr_event_base_; 81 82 // The display objects we present to chrome. 83 std::vector<gfx::Display> displays_; 84 85 // The timer to delay configuring outputs. See also the comments in 86 // Dispatch(). 87 scoped_ptr<base::OneShotTimer<DesktopScreenX11> > configure_timer_; 88 89 ObserverList<gfx::DisplayObserver> observer_list_; 90 91 DISALLOW_COPY_AND_ASSIGN(DesktopScreenX11); 92 }; 93 94 } // namespace views 95 96 #endif // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_SCREEN_X11_H_ 97
