blob: 39d715bc8fcef32cb6521a7ecf6d07a953044f29 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
// 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.
#ifndef COMPONENTS_MUS_PUBLIC_CPP_VIEW_TRACKER_H_
#define COMPONENTS_MUS_PUBLIC_CPP_VIEW_TRACKER_H_
#include <stdint.h>
#include <set>
#include "components/mus/public/cpp/view_observer.h"
#include "third_party/mojo/src/mojo/public/cpp/system/macros.h"
namespace mojo {
class ViewTracker : public ViewObserver {
public:
using Views = std::set<View*>;
ViewTracker();
~ViewTracker() override;
// Returns the set of views being observed.
const std::set<View*>& views() const { return views_; }
// Adds |view| to the set of Views being tracked.
void Add(View* view);
// Removes |view| from the set of views being tracked.
void Remove(View* view);
// Returns true if |view| was previously added and has not been removed or
// deleted.
bool Contains(View* view);
// ViewObserver overrides:
void OnViewDestroying(View* view) override;
private:
Views views_;
MOJO_DISALLOW_COPY_AND_ASSIGN(ViewTracker);
};
} // namespace mojo
#endif // COMPONENTS_MUS_PUBLIC_CPP_VIEW_TRACKER_H_
|
