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| 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 |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef ResizeObserverController_h |
| 6 #define ResizeObserverController_h |
| 7 |
| 8 #include "platform/heap/Handle.h" |
| 9 |
| 10 namespace blink { |
| 11 |
| 12 class ResizeObserver; |
| 13 |
| 14 // ResizeObserverController keeps track of all ResizeObservers |
| 15 // in a single Document. |
| 16 class ResizeObserverController : public GarbageCollected<ResizeObserverControlle
r> { |
| 17 |
| 18 public: |
| 19 |
| 20 static const size_t kRenderLoopLimit = 16; |
| 21 |
| 22 ResizeObserverController(); |
| 23 |
| 24 void addObserver(ResizeObserver&); |
| 25 bool gatherObservations(); |
| 26 void deliverObservations(); |
| 27 void clearObservations(); |
| 28 |
| 29 DECLARE_TRACE(); |
| 30 |
| 31 private: |
| 32 |
| 33 using ObserverSet = HeapHashSet<WeakMember<ResizeObserver>>; |
| 34 // Active observers |
| 35 ObserverSet m_observers; |
| 36 }; |
| 37 |
| 38 } // namespace blink |
| 39 |
| 40 #endif |
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