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      1 // Copyright (c) 2012 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 #include "ui/base/gtk/gtk_screen_util.h"
      6 
      7 #include "base/logging.h"
      8 
      9 namespace ui {
     10 
     11 bool IsScreenComposited() {
     12   GdkScreen* screen = gdk_screen_get_default();
     13   return gdk_screen_is_composited(screen) == TRUE;
     14 }
     15 
     16 gfx::Point ScreenPoint(GtkWidget* widget) {
     17   int x, y;
     18   gdk_display_get_pointer(gtk_widget_get_display(widget), NULL, &x, &y,
     19                           NULL);
     20   return gfx::Point(x, y);
     21 }
     22 
     23 gfx::Point ClientPoint(GtkWidget* widget) {
     24   int x, y;
     25   gtk_widget_get_pointer(widget, &x, &y);
     26   return gfx::Point(x, y);
     27 }
     28 
     29 gfx::Vector2d GetWidgetScreenOffset(GtkWidget* widget) {
     30   GdkWindow* window = gtk_widget_get_window(widget);
     31 
     32   if (!window) {
     33     NOTREACHED() << "Must only be called on realized widgets.";
     34     return gfx::Vector2d(0, 0);
     35   }
     36 
     37   gint x, y;
     38   gdk_window_get_origin(window, &x, &y);
     39 
     40   if (!gtk_widget_get_has_window(widget)) {
     41     GtkAllocation allocation;
     42     gtk_widget_get_allocation(widget, &allocation);
     43     x += allocation.x;
     44     y += allocation.y;
     45   }
     46 
     47   return gfx::Vector2d(x, y);
     48 }
     49 
     50 gfx::Rect GetWidgetScreenBounds(GtkWidget* widget) {
     51   GtkAllocation allocation;
     52   gtk_widget_get_allocation(widget, &allocation);
     53 
     54   return gfx::Rect(PointAtOffsetFromOrigin(GetWidgetScreenOffset(widget)),
     55                    gfx::Size(allocation.width, allocation.height));
     56 }
     57 
     58 }  // namespace ui
     59