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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef OpenedFrameTracker_h | 5 #ifndef OpenedFrameTracker_h |
6 #define OpenedFrameTracker_h | 6 #define OpenedFrameTracker_h |
7 | 7 |
8 #include "wtf/HashSet.h" | 8 #include "wtf/HashSet.h" |
9 #include "wtf/Noncopyable.h" | 9 #include "wtf/Noncopyable.h" |
10 | 10 |
11 namespace blink { | 11 namespace blink { |
12 | 12 |
13 class Visitor; | |
14 class WebFrame; | 13 class WebFrame; |
15 | 14 |
16 // Small helper class to track the set of frames that a WebFrame has opened. | 15 // Small helper class to track the set of frames that a WebFrame has opened. |
17 // Due to layering restrictions, we need to hide the implementation, since | 16 // Due to layering restrictions, we need to hide the implementation, since |
18 // public/web/ cannot depend on wtf/. | 17 // public/web/ cannot depend on wtf/. |
19 class OpenedFrameTracker { | 18 class OpenedFrameTracker { |
20 WTF_MAKE_NONCOPYABLE(OpenedFrameTracker); | 19 WTF_MAKE_NONCOPYABLE(OpenedFrameTracker); |
21 | 20 |
22 public: | 21 public: |
23 OpenedFrameTracker(); | 22 OpenedFrameTracker(); |
24 ~OpenedFrameTracker(); | 23 ~OpenedFrameTracker(); |
25 | 24 |
26 bool isEmpty() const; | 25 bool isEmpty() const; |
27 void add(WebFrame*); | 26 void add(WebFrame*); |
28 void remove(WebFrame*); | 27 void remove(WebFrame*); |
29 | 28 |
30 // Helper used when swapping a frame into the frame tree: this updates the | 29 // Helper used when swapping a frame into the frame tree: this updates the |
31 // opener for opened frames to point to the new frame being swapped in. | 30 // opener for opened frames to point to the new frame being swapped in. |
32 void transferTo(WebFrame*); | 31 void transferTo(WebFrame*); |
33 | 32 |
34 void traceFrames(Visitor*); | 33 // Helper function to clear the openers when the frame is being detached. |
34 void detach() { transferTo(nullptr); } | |
dcheng
2017/02/21 21:59:37
Nit: call this dispose().
lfg
2017/02/21 22:04:50
Done.
| |
35 | 35 |
36 private: | 36 private: |
37 WTF::HashSet<WebFrame*> m_openedFrames; | 37 WTF::HashSet<WebFrame*> m_openedFrames; |
38 }; | 38 }; |
39 | 39 |
40 } // namespace blink | 40 } // namespace blink |
41 | 41 |
42 #endif // WebFramePrivate_h | 42 #endif // WebFramePrivate_h |
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