OLD | NEW |
---|---|
1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 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 ResizeObserverController_h | 5 #ifndef ResizeObserverController_h |
6 #define ResizeObserverController_h | 6 #define ResizeObserverController_h |
7 | 7 |
8 #include "platform/heap/Handle.h" | 8 #include "platform/heap/Handle.h" |
9 | 9 |
10 namespace blink { | 10 namespace blink { |
11 | 11 |
12 class ResizeObserver; | 12 class ResizeObserver; |
13 | 13 |
14 // ResizeObserverController keeps track of all ResizeObservers | 14 // ResizeObserverController keeps track of all ResizeObservers |
15 // in a single Document. | 15 // in a single Document. |
16 // | |
17 // The observation API is used to integrate ResizeObserver | |
18 // and the event loop. It delivers notification in a loop. | |
19 // In each iteration, only notifications deeper than the | |
20 // shallowest notification from previous iteration are delivered. | |
16 class ResizeObserverController final : public GarbageCollected<ResizeObserverCon troller> { | 21 class ResizeObserverController final : public GarbageCollected<ResizeObserverCon troller> { |
17 public: | 22 public: |
23 static const size_t kDepthBottom = 4096; | |
24 | |
18 ResizeObserverController(); | 25 ResizeObserverController(); |
19 | 26 |
20 void addObserver(ResizeObserver&); | 27 void addObserver(ResizeObserver&); |
21 | 28 |
29 // observation API | |
30 // Returns depth of shallowest observed node, kDepthLimit if none. | |
31 size_t gatherObservations(size_t deeperThan); | |
32 bool skippedObservations(); | |
ikilpatrick
2016/07/29 23:18:39
comment?
atotic1
2016/07/30 03:16:29
Done. I just did not upload changes before waiting
| |
33 void deliverObservations(); | |
34 void clearObservations(); | |
35 void observerChanged() { m_observersChanged = true; } | |
36 | |
22 DECLARE_TRACE(); | 37 DECLARE_TRACE(); |
23 | 38 |
24 private: | 39 private: |
25 // Active observers | 40 // Active observers |
26 HeapHashSet<WeakMember<ResizeObserver>> m_observers; | 41 HeapHashSet<WeakMember<ResizeObserver>> m_observers; |
42 // True if observers were changed since last notification | |
ikilpatrick
2016/07/29 23:18:39
clarify comment, is this the set of observers that
atotic1
2016/07/30 03:16:29
Changed to:
// True if ANY observers were changed
| |
43 bool m_observersChanged; | |
27 }; | 44 }; |
28 | 45 |
29 } // namespace blink | 46 } // namespace blink |
30 | 47 |
31 #endif | 48 #endif |
OLD | NEW |