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Unified Diff: mojo/services/public/cpp/view_manager/view_tracker.cc

Issue 728133002: Update mojo sdk to rev e01f9a49449381a5eb430c1fd88bf2cae73ec35a (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: android + ios gyp fixes Created 6 years, 1 month ago
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Index: mojo/services/public/cpp/view_manager/view_tracker.cc
diff --git a/mojo/services/public/cpp/view_manager/view_tracker.cc b/mojo/services/public/cpp/view_manager/view_tracker.cc
new file mode 100644
index 0000000000000000000000000000000000000000..453d6f97160d7b887a80f28050c27015ce2777b0
--- /dev/null
+++ b/mojo/services/public/cpp/view_manager/view_tracker.cc
@@ -0,0 +1,41 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "mojo/services/public/cpp/view_manager/view_tracker.h"
+
+namespace mojo {
+
+ViewTracker::ViewTracker() {
+}
+
+ViewTracker::~ViewTracker() {
+ for (Views::iterator i = views_.begin(); i != views_.end(); ++i)
+ (*i)->RemoveObserver(this);
+}
+
+void ViewTracker::Add(View* view) {
+ if (views_.count(view))
+ return;
+
+ view->AddObserver(this);
+ views_.insert(view);
+}
+
+void ViewTracker::Remove(View* view) {
+ if (views_.count(view)) {
+ views_.erase(view);
+ view->RemoveObserver(this);
+ }
+}
+
+bool ViewTracker::Contains(View* view) {
+ return views_.count(view) > 0;
+}
+
+void ViewTracker::OnViewDestroying(View* view) {
+ DCHECK_GT(views_.count(view), 0u);
+ Remove(view);
+}
+
+} // namespace mojo
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