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Side by Side Diff: components/view_manager/public/cpp/view_tracker.h

Issue 1344573002: Mandoline: Rename components/view_manager to components/mus (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Rebased Created 5 years, 3 months ago
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1 // Copyright 2014 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 #ifndef COMPONENTS_VIEW_MANAGER_PUBLIC_CPP_VIEW_TRACKER_H_
6 #define COMPONENTS_VIEW_MANAGER_PUBLIC_CPP_VIEW_TRACKER_H_
7
8 #include <stdint.h>
9 #include <set>
10
11 #include "components/view_manager/public/cpp/view_observer.h"
12 #include "third_party/mojo/src/mojo/public/cpp/system/macros.h"
13
14 namespace mojo {
15
16 class ViewTracker : public ViewObserver {
17 public:
18 using Views = std::set<View*>;
19
20 ViewTracker();
21 ~ViewTracker() override;
22
23 // Returns the set of views being observed.
24 const std::set<View*>& views() const { return views_; }
25
26 // Adds |view| to the set of Views being tracked.
27 void Add(View* view);
28
29 // Removes |view| from the set of views being tracked.
30 void Remove(View* view);
31
32 // Returns true if |view| was previously added and has not been removed or
33 // deleted.
34 bool Contains(View* view);
35
36 // ViewObserver overrides:
37 void OnViewDestroying(View* view) override;
38
39 private:
40 Views views_;
41
42 MOJO_DISALLOW_COPY_AND_ASSIGN(ViewTracker);
43 };
44
45 } // namespace mojo
46
47 #endif // COMPONENTS_VIEW_MANAGER_PUBLIC_CPP_VIEW_TRACKER_H_
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