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1 // Copyright 2015 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 IntersectionObserver_h | |
6 #define IntersectionObserver_h | |
7 | |
8 #include "bindings/core/v8/ScriptWrappable.h" | |
9 #include "core/dom/Element.h" | |
10 #include "core/dom/IntersectionObservation.h" | |
11 #include "core/dom/IntersectionObservationRegistry.h" | |
12 #include "core/dom/IntersectionObserverEntry.h" | |
13 #include "platform/heap/Handle.h" | |
14 #include "wtf/HashSet.h" | |
15 #include "wtf/RefCounted.h" | |
16 #include "wtf/Vector.h" | |
17 | |
18 namespace blink { | |
19 | |
20 class ExceptionState; | |
21 class IntersectionObserverCallback; | |
22 class IntersectionObserverInit; | |
23 | |
24 typedef WillBeHeapVector<RefPtrWillBeRawPtr<IntersectionObserverEntry>> Intersec tionObserverEntryVector; | |
25 | |
26 class IntersectionObserver final : public RefCountedWillBeGarbageCollectedFinali zed<IntersectionObserver>, public ScriptWrappable { | |
haraken
2015/11/16 00:41:35
You don't need to use WillBe types.
szager1
2015/11/19 19:15:38
Working on this...
| |
27 DEFINE_WRAPPERTYPEINFO(); | |
28 friend class IntersectionObserverRegistry; | |
29 public: | |
30 static PassRefPtrWillBeRawPtr<IntersectionObserver> create(const Intersectio nObserverInit&, PassOwnPtrWillBeRawPtr<IntersectionObserverCallback>, ExceptionS tate&); | |
31 static void resumeSuspendedObservers(); | |
32 | |
33 ~IntersectionObserver(); | |
34 | |
35 bool checkTargetHierarchy(Element*); | |
36 Document& getTrackingDocumentForTarget(Element*); | |
37 void observe(Element*, ExceptionState&); | |
38 void unobserve(Element*, ExceptionState&); | |
39 void disconnect(IntersectionObservation&); | |
40 void disconnect(); | |
41 IntersectionObserverEntryVector takeRecords(); | |
42 | |
43 void enqueueIntersectionObserverEntry(PassRefPtrWillBeRawPtr<IntersectionObs erverEntry>); | |
44 | |
45 bool hasRoot() const { return m_hasRoot; } | |
46 Element* root() { return m_root.get(); } | |
47 Document* trackingDocument() { return m_trackingDocument.get(); } | |
48 const Vector<float>& thresholds() const { return m_thresholds; } | |
49 size_t firstThresholdGreaterThan(float ratio) const; | |
50 bool shouldBeSuspended() const; | |
51 void deliver(); | |
52 | |
53 // Eagerly finalized as destructor accesses heap object members. | |
54 EAGERLY_FINALIZE(); | |
haraken
2015/11/16 00:41:35
I guess you don't need this. The destructor is not
szager1
2015/11/19 19:15:38
Done.
| |
55 DECLARE_TRACE(); | |
56 | |
57 private: | |
58 explicit IntersectionObserver(PassOwnPtrWillBeRawPtr<IntersectionObserverCal lback>, RefPtrWillBeRawPtr<Element>, int, const Vector<float>&); | |
59 | |
60 PassRefPtr<IntersectionObservation> createObservation(Element*); | |
61 | |
62 OwnPtrWillBeMember<IntersectionObserverCallback> m_callback; | |
63 WeakPtrWillBeWeakMember<Element> m_root; | |
64 WeakPtrWillBeWeakMember<Document> m_trackingDocument; | |
65 IntersectionObservation::HashSet m_observations; | |
66 IntersectionObserverEntryVector m_entries; | |
67 Vector<float> m_thresholds; | |
68 int m_rootMargin; | |
69 // m_root is a weak pointer, so may become null if the root Element is deall ocated. | |
70 // Only m_hasRoot indicates for certain that there *should* be a root. | |
71 bool m_hasRoot; | |
72 }; | |
73 | |
74 } // namespace blink | |
75 | |
76 #endif // IntersectionObserver_h | |
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