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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/IdleRequestCallback.h" | 9 #include "core/dom/IdleRequestCallback.h" |
10 #include "core/dom/IntersectionObserver.h" | 10 #include "core/dom/IntersectionObserver.h" |
11 #include "platform/heap/Handle.h" | 11 #include "platform/heap/Handle.h" |
12 #include "wtf/HashSet.h" | 12 #include "wtf/HashSet.h" |
13 | 13 |
14 // Design doc for IntersectionObserver implementation: | 14 // Design doc for IntersectionObserver implementation: |
15 // https://docs.google.com/a/google.com/document/d/1hLK0eyT5_BzyNS4OkjsnoqqFQD YCbKfyBinj94OnLiQ | 15 // https://docs.google.com/a/google.com/document/d/1hLK0eyT5_BzyNS4OkjsnoqqFQD YCbKfyBinj94OnLiQ |
16 | 16 |
17 namespace blink { | 17 namespace blink { |
18 | 18 |
19 class CancellableTaskFactory; | |
19 class Document; | 20 class Document; |
20 | 21 |
21 class IntersectionObserverController : public IdleRequestCallback, public Active DOMObject { | 22 class IntersectionObserverController : public IdleRequestCallback, public Active DOMObject { |
22 USING_GARBAGE_COLLECTED_MIXIN(IntersectionObserverController); | 23 USING_GARBAGE_COLLECTED_MIXIN(IntersectionObserverController); |
23 public: | 24 public: |
24 static IntersectionObserverController* create(Document*); | 25 static IntersectionObserverController* create(Document*); |
25 ~IntersectionObserverController(); | 26 ~IntersectionObserverController(); |
26 | 27 |
27 void resume() override; | 28 void resume() override; |
28 void handleEvent(IdleDeadline*) override; | 29 void handleEvent(IdleDeadline*) override; |
29 | 30 |
30 void scheduleIntersectionObserverForDelivery(IntersectionObserver&); | 31 void scheduleIntersectionObserverForDelivery(IntersectionObserver&); |
31 void deliverIntersectionObservations(); | 32 void deliverIntersectionObservations(); |
32 void computeTrackedIntersectionObservations(); | 33 void computeTrackedIntersectionObservations(); |
33 void addTrackedObserver(IntersectionObserver&); | 34 void addTrackedObserver(IntersectionObserver&); |
34 void removeTrackedObserversForRoot(const Node&); | 35 void removeTrackedObserversForRoot(const Node&); |
35 | 36 |
36 DECLARE_TRACE(); | 37 DECLARE_TRACE(); |
37 | 38 |
38 private: | 39 private: |
39 explicit IntersectionObserverController(Document*); | 40 explicit IntersectionObserverController(Document*); |
40 | 41 |
41 private: | 42 private: |
43 void scheduleIdleNotification(IntersectionObserver&); | |
44 void scheduleLowLatencyNotification(IntersectionObserver&); | |
45 void deliverLowLatencyNotifications(); | |
46 | |
42 // IntersectionObservers for which this is the tracking document. | 47 // IntersectionObservers for which this is the tracking document. |
43 HeapHashSet<WeakMember<IntersectionObserver>> m_trackedIntersectionObservers ; | 48 HeapHashSet<WeakMember<IntersectionObserver>> m_trackedIntersectionObservers ; |
44 // IntersectionObservers for which this is the execution context of the call back. | 49 // IntersectionObservers for which this is the execution context of the call back. |
45 HeapHashSet<Member<IntersectionObserver>> m_pendingIntersectionObservers; | 50 HeapHashSet<Member<IntersectionObserver>> m_pendingIntersectionObservers; |
51 HeapHashSet<Member<IntersectionObserver>> m_pendingLowLatencyIntersectionObs ervers; | |
52 | |
53 std::unique_ptr<CancellableTaskFactory> m_lowLatencyNotificationTask; | |
haraken
2016/09/12 00:46:32
IIUC, we've decided to use WeakPtrFactory to post
| |
46 | 54 |
47 int m_callbackID; | 55 int m_callbackID; |
48 bool m_callbackFiredWhileSuspended; | 56 bool m_callbackFiredWhileSuspended; |
49 }; | 57 }; |
50 | 58 |
51 } // namespace blink | 59 } // namespace blink |
52 | 60 |
53 #endif // IntersectionObserverController_h | 61 #endif // IntersectionObserverController_h |
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