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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_SCREEN_X11_H_
#define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_SCREEN_X11_H_
#include "base/observer_list.h"
#include "base/timer/timer.h"
#include "ui/events/platform/platform_event_dispatcher.h"
#include "ui/gfx/screen.h"
#include "ui/views/views_export.h"
namespace gfx {
class Display;
}
typedef unsigned long XID;
typedef XID Window;
typedef struct _XDisplay Display;
namespace views {
class DesktopScreenX11Test;
// Our singleton screen implementation that talks to xrandr.
class VIEWS_EXPORT DesktopScreenX11 : public gfx::Screen,
public ui::PlatformEventDispatcher {
public:
DesktopScreenX11();
virtual ~DesktopScreenX11();
// Takes a set of displays and dispatches the screen change events to
// listeners. Exposed for testing.
void ProcessDisplayChange(const std::vector<gfx::Display>& displays);
// Overridden from gfx::Screen:
virtual bool IsDIPEnabled() OVERRIDE;
virtual gfx::Point GetCursorScreenPoint() OVERRIDE;
virtual gfx::NativeWindow GetWindowUnderCursor() OVERRIDE;
virtual gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point)
OVERRIDE;
virtual int GetNumDisplays() const OVERRIDE;
virtual std::vector<gfx::Display> GetAllDisplays() const OVERRIDE;
virtual gfx::Display GetDisplayNearestWindow(
gfx::NativeView window) const OVERRIDE;
virtual gfx::Display GetDisplayNearestPoint(
const gfx::Point& point) const OVERRIDE;
virtual gfx::Display GetDisplayMatching(
const gfx::Rect& match_rect) const OVERRIDE;
virtual gfx::Display GetPrimaryDisplay() const OVERRIDE;
virtual void AddObserver(gfx::DisplayObserver* observer) OVERRIDE;
virtual void RemoveObserver(gfx::DisplayObserver* observer) OVERRIDE;
// ui::PlatformEventDispatcher:
virtual bool CanDispatchEvent(const ui::PlatformEvent& event) OVERRIDE;
virtual uint32_t DispatchEvent(const ui::PlatformEvent& event) OVERRIDE;
private:
friend class DesktopScreenX11Test;
// Constructor used in tests.
DesktopScreenX11(const std::vector<gfx::Display>& test_displays);
// Builds a list of displays from the current screen information offered by
// the X server.
std::vector<gfx::Display> BuildDisplaysFromXRandRInfo();
// We delay updating the display so we can coalesce events.
void ConfigureTimerFired();
Display* xdisplay_;
::Window x_root_window_;
// Whether the x server supports the XRandR extension.
bool has_xrandr_;
// The base of the event numbers used to represent XRandr events used in
// decoding events regarding output add/remove.
int xrandr_event_base_;
// The display objects we present to chrome.
std::vector<gfx::Display> displays_;
// The timer to delay configuring outputs. See also the comments in
// Dispatch().
scoped_ptr<base::OneShotTimer<DesktopScreenX11> > configure_timer_;
ObserverList<gfx::DisplayObserver> observer_list_;
DISALLOW_COPY_AND_ASSIGN(DesktopScreenX11);
};
} // namespace views
#endif // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_SCREEN_X11_H_
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