1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4  * License, v. 2.0. If a copy of the MPL was not distributed with this
5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 
7 #ifndef mozilla_widget_gtk_ScreenHelperGTK_h
8 #define mozilla_widget_gtk_ScreenHelperGTK_h
9 
10 #include "mozilla/widget/ScreenManager.h"
11 
12 #include "gdk/gdk.h"
13 #ifdef MOZ_X11
14 #  include <X11/Xlib.h>
15 #  include "X11UndefineNone.h"
16 #endif
17 
18 namespace mozilla {
19 namespace widget {
20 
21 class ScreenHelperGTK final : public ScreenManager::Helper {
22  public:
23   ScreenHelperGTK();
24   ~ScreenHelperGTK() override;
25 
26   static gint GetGTKMonitorScaleFactor(gint aMonitorNum = 0);
27 
28 #ifdef MOZ_X11
NetWorkareaAtom()29   Atom NetWorkareaAtom() { return mNetWorkareaAtom; }
30 #endif
31 
32   // For internal use from signal callback functions
33   void RefreshScreens();
34 
35  private:
36   GdkWindow* mRootWindow;
37 #ifdef MOZ_X11
38   Atom mNetWorkareaAtom;
39 #endif
40 };
41 
42 }  // namespace widget
43 }  // namespace mozilla
44 
45 #endif  // mozilla_widget_gtk_ScreenHelperGTK_h
46