src/ui/base/x/work_area_watcher_x.cc

   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/work_area_watcher_x.h"
   6
   7 #include "base/memory/singleton.h"
   8 #include "ui/base/work_area_watcher_observer.h"
   9 #include "ui/base/x/root_window_property_watcher_x.h"
  10 #include "ui/base/x/x11_util.h"
  11
  12 namespace ui {
  13
  14 static const char* const kNetWorkArea = "_NET_WORKAREA";
  15
  16 // static
  17 WorkAreaWatcherX* WorkAreaWatcherX::GetInstance() {
  18   return Singleton<WorkAreaWatcherX>::get();
  19 }
  20
  21 // static
  22 void WorkAreaWatcherX::AddObserver(WorkAreaWatcherObserver* observer) {
  23   // Ensure that RootWindowPropertyWatcherX exists.
  24   internal::RootWindowPropertyWatcherX::GetInstance();
  25   GetInstance()->observers_.AddObserver(observer);
  26 }
  27
  28 // static
  29 void WorkAreaWatcherX::RemoveObserver(WorkAreaWatcherObserver* observer) {
  30   GetInstance()->observers_.RemoveObserver(observer);
  31 }
  32
  33 // static
  34 void WorkAreaWatcherX::Notify() {
  35   GetInstance()->NotifyWorkAreaChanged();
  36 }
  37
  38 // static
  39 Atom WorkAreaWatcherX::GetPropertyAtom() {
  40   return GetAtom(kNetWorkArea);
  41 }
  42
  43 WorkAreaWatcherX::WorkAreaWatcherX() {
  44 }
  45
  46 WorkAreaWatcherX::~WorkAreaWatcherX() {
  47 }
  48
  49 void WorkAreaWatcherX::NotifyWorkAreaChanged() {
  50   FOR_EACH_OBSERVER(WorkAreaWatcherObserver, observers_, WorkAreaChanged());
  51 }
  52
  53 }  // namespace ui