X11Util.h (1779B)
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_X11Util_h 8 #define mozilla_X11Util_h 9 10 // Utilities common to all X clients, regardless of UI toolkit. 11 12 #if defined(MOZ_WIDGET_GTK) 13 # include <gdk/gdk.h> 14 # include <gdk/gdkx.h> 15 # include "mozilla/WidgetUtilsGtk.h" 16 # include "X11UndefineNone.h" 17 #else 18 # error Unknown toolkit 19 #endif 20 21 #include <string.h> // for memset 22 23 namespace mozilla { 24 25 /** 26 * Return the default X Display created and used by the UI toolkit. 27 */ 28 inline Display* DefaultXDisplay() { 29 #if defined(MOZ_WIDGET_GTK) 30 GdkDisplay* gdkDisplay = gdk_display_get_default(); 31 if (mozilla::widget::GdkIsX11Display(gdkDisplay)) { 32 return GDK_DISPLAY_XDISPLAY(gdkDisplay); 33 } 34 #endif 35 return nullptr; 36 } 37 38 /** 39 * Sets *aVisual to point to aDisplay's Visual struct corresponding to 40 * aVisualID, and *aDepth to its depth. When aVisualID is None, these are set 41 * to nullptr and 0 respectively. Both out-parameter pointers are assumed 42 * non-nullptr. 43 */ 44 void FindVisualAndDepth(Display* aDisplay, VisualID aVisualID, Visual** aVisual, 45 int* aDepth); 46 47 /** 48 * Ensure that all X requests have been processed. 49 * 50 * This is similar to XSync, but doesn't need a round trip if the previous 51 * request was synchronous or if events have been received since the last 52 * request. Subsequent FinishX calls will be noops if there have been no 53 * intermediate requests. 54 */ 55 56 void FinishX(Display* aDisplay); 57 58 } // namespace mozilla 59 60 #endif // mozilla_X11Util_h