ui/aura/window_tracker.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/aura/window_tracker.h"
   6
   7 #include "ui/aura/window.h"
   8
   9 namespace aura {
  10
  11 WindowTracker::WindowTracker() {
  12 }
  13
  14 WindowTracker::~WindowTracker() {
  15   for (Windows::iterator i = windows_.begin(); i != windows_.end(); ++i)
  16     (*i)->RemoveObserver(this);
  17 }
  18
  19 void WindowTracker::Add(Window* window) {
  20   if (windows_.count(window))
  21     return;
  22
  23   window->AddObserver(this);
  24   windows_.insert(window);
  25 }
  26
  27 void WindowTracker::Remove(Window* window) {
  28   if (windows_.count(window)) {
  29     windows_.erase(window);
  30     window->RemoveObserver(this);
  31   }
  32 }
  33
  34 bool WindowTracker::Contains(Window* window) {
  35   return windows_.count(window) > 0;
  36 }
  37
  38 void WindowTracker::OnWindowDestroying(Window* window) {
  39   DCHECK_GT(windows_.count(window), 0u);
  40   Remove(window);
  41 }
  42
  43 }  // namespace aura