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/x/root_window_property_watcher_x.h" 6 7 #include <gdk/gdk.h> 8 #include <gdk/gdkx.h> 9 10 #include "base/memory/singleton.h" 11 #include "ui/base/x/active_window_watcher_x.h" 12 #include "ui/base/x/work_area_watcher_x.h" 13 14 namespace ui { 15 16 namespace internal { 17 18 // static 19 RootWindowPropertyWatcherX* RootWindowPropertyWatcherX::GetInstance() { 20 return Singleton<RootWindowPropertyWatcherX>::get(); 21 } 22 23 RootWindowPropertyWatcherX::RootWindowPropertyWatcherX() { 24 GdkWindow* root = gdk_get_default_root_window(); 25 26 // Set up X Event filter to listen for PropertyChange X events. 27 // Don't use XSelectInput directly here, as gdk internally seems to cache the 28 // mask and reapply XSelectInput after this, resetting any mask we set here. 29 gdk_window_set_events(root, 30 static_cast<GdkEventMask>(gdk_window_get_events(root) | 31 GDK_PROPERTY_CHANGE_MASK)); 32 gdk_window_add_filter(root, 33 &RootWindowPropertyWatcherX::OnWindowXEventThunk, 34 this); 35 } 36 37 RootWindowPropertyWatcherX::~RootWindowPropertyWatcherX() { 38 gdk_window_remove_filter(NULL, 39 &RootWindowPropertyWatcherX::OnWindowXEventThunk, 40 this); 41 } 42 43 GdkFilterReturn RootWindowPropertyWatcherX::OnWindowXEvent( 44 GdkXEvent* xevent, GdkEvent* event) { 45 XEvent* xev = static_cast<XEvent*>(xevent); 46 47 if (xev->xany.type == PropertyNotify) { 48 if (xev->xproperty.atom == ActiveWindowWatcherX::GetPropertyAtom()) 49 ActiveWindowWatcherX::Notify(); 50 else if (xev->xproperty.atom == WorkAreaWatcherX::GetPropertyAtom()) 51 WorkAreaWatcherX::Notify(); 52 } 53 54 return GDK_FILTER_CONTINUE; 55 } 56 57 } // namespace internal 58 59 } // namespace ui 60
