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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 IntersectionObserverController_h | 5 #ifndef IntersectionObserverController_h |
6 #define IntersectionObserverController_h | 6 #define IntersectionObserverController_h |
7 | 7 |
8 #include "core/dom/ActiveDOMObject.h" | 8 #include "core/dom/ActiveDOMObject.h" |
9 #include "core/dom/Element.h" | 9 #include "core/dom/Element.h" |
10 #include "core/dom/IdleRequestCallback.h" | |
11 #include "core/dom/IntersectionObserver.h" | 10 #include "core/dom/IntersectionObserver.h" |
| 11 #include "platform/Timer.h" |
12 #include "platform/heap/Handle.h" | 12 #include "platform/heap/Handle.h" |
13 #include "wtf/HashSet.h" | 13 #include "wtf/HashSet.h" |
14 | 14 |
15 // Design doc for IntersectionObserver implementation: | 15 // Design doc for IntersectionObserver implementation: |
16 // https://docs.google.com/a/google.com/document/d/1hLK0eyT5_BzyNS4OkjsnoqqFQD
YCbKfyBinj94OnLiQ | 16 // https://docs.google.com/a/google.com/document/d/1hLK0eyT5_BzyNS4OkjsnoqqFQD
YCbKfyBinj94OnLiQ |
17 | 17 |
18 namespace blink { | 18 namespace blink { |
19 | 19 |
20 class IntersectionObserverController : public IdleRequestCallback, public Active
DOMObject { | 20 class IntersectionObserverController : public GarbageCollectedFinalized<Intersec
tionObserverController>, public ActiveDOMObject { |
21 WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(IntersectionObserverController); | 21 WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(IntersectionObserverController); |
22 public: | 22 public: |
23 static IntersectionObserverController* create(Document*); | 23 static IntersectionObserverController* create(Document*); |
24 ~IntersectionObserverController(); | 24 ~IntersectionObserverController(); |
25 | 25 |
26 void resume() override; | 26 void resume() override; |
27 void handleEvent(IdleDeadline*) override; | |
28 | 27 |
29 void scheduleIntersectionObserverForDelivery(IntersectionObserver&); | 28 void scheduleIntersectionObserverForDelivery(IntersectionObserver&); |
30 void deliverIntersectionObservations(); | 29 void deliverIntersectionObservations(Timer<IntersectionObserverController>*)
; |
31 void computeTrackedIntersectionObservations(); | 30 void computeTrackedIntersectionObservations(); |
32 void addTrackedObserver(IntersectionObserver&); | 31 void addTrackedObserver(IntersectionObserver&); |
33 void removeTrackedObserversForRoot(const Node&); | 32 void removeTrackedObserversForRoot(const Node&); |
34 | 33 |
35 DECLARE_TRACE(); | 34 DECLARE_TRACE(); |
36 | 35 |
37 private: | 36 private: |
38 explicit IntersectionObserverController(Document*); | 37 explicit IntersectionObserverController(Document*); |
39 | 38 |
40 private: | 39 private: |
| 40 Timer<IntersectionObserverController> m_timer; |
41 // IntersectionObservers for which this is the tracking document. | 41 // IntersectionObservers for which this is the tracking document. |
42 HeapHashSet<WeakMember<IntersectionObserver>> m_trackedIntersectionObservers
; | 42 HeapHashSet<WeakMember<IntersectionObserver>> m_trackedIntersectionObservers
; |
43 // IntersectionObservers for which this is the execution context of the call
back. | 43 // IntersectionObservers for which this is the execution context of the call
back. |
44 HeapHashSet<Member<IntersectionObserver>> m_pendingIntersectionObservers; | 44 HeapHashSet<Member<IntersectionObserver>> m_pendingIntersectionObservers; |
45 | 45 |
46 bool m_callbackIsScheduled; | 46 bool m_timerFiredWhileSuspended; |
47 bool m_callbackFiredWhileSuspended; | |
48 }; | 47 }; |
49 | 48 |
50 } // namespace blink | 49 } // namespace blink |
51 | 50 |
52 #endif // IntersectionObserverController_h | 51 #endif // IntersectionObserverController_h |
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