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.
5 #ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_SCREEN_X11_H_
6 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_SCREEN_X11_H_
8 #include "base/message_loop/message_pump_dispatcher.h"
9 #include "base/observer_list.h"
10 #include "base/timer/timer.h"
11 #include "ui/gfx/screen.h"
12 #include "ui/views/views_export.h"
18 typedef unsigned long XID;
20 typedef struct _XDisplay Display;
23 class DesktopScreenX11Test;
25 // Our singleton screen implementation that talks to xrandr.
26 class VIEWS_EXPORT DesktopScreenX11 : public gfx::Screen,
27 public base::MessagePumpDispatcher {
31 virtual ~DesktopScreenX11();
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);
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)
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;
55 // Overridden from MessagePumpDispatcher:
56 virtual uint32_t Dispatch(const base::NativeEvent& event) OVERRIDE;
59 friend class DesktopScreenX11Test;
61 // Constructor used in tests.
62 DesktopScreenX11(const std::vector<gfx::Display>& test_displays);
64 // Builds a list of displays from the current screen information offered by
66 std::vector<gfx::Display> BuildDisplaysFromXRandRInfo();
68 // We delay updating the display so we can coalesce events.
69 void ConfigureTimerFired();
72 ::Window x_root_window_;
74 // Whether the x server supports the XRandR extension.
77 // The base of the event numbers used to represent XRandr events used in
78 // decoding events regarding output add/remove.
79 int xrandr_event_base_;
81 // The display objects we present to chrome.
82 std::vector<gfx::Display> displays_;
84 // The timer to delay configuring outputs. See also the comments in
86 scoped_ptr<base::OneShotTimer<DesktopScreenX11> > configure_timer_;
88 ObserverList<gfx::DisplayObserver> observer_list_;
90 DISALLOW_COPY_AND_ASSIGN(DesktopScreenX11);
95 #endif // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_SCREEN_X11_H_