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 IntersectionObserver_h | 5 #ifndef IntersectionObserver_h |
6 #define IntersectionObserver_h | 6 #define IntersectionObserver_h |
7 | 7 |
8 #include "bindings/core/v8/ScriptWrappable.h" | 8 #include "bindings/core/v8/ScriptWrappable.h" |
9 #include "core/dom/Element.h" | 9 #include "core/dom/Element.h" |
10 #include "core/dom/IntersectionObservation.h" | 10 #include "core/dom/IntersectionObservation.h" |
11 #include "core/dom/IntersectionObserverEntry.h" | 11 #include "core/dom/IntersectionObserverEntry.h" |
12 #include "platform/heap/Handle.h" | 12 #include "platform/heap/Handle.h" |
13 #include "wtf/HashSet.h" | 13 #include "wtf/HashSet.h" |
14 #include "wtf/RefCounted.h" | 14 #include "wtf/RefCounted.h" |
15 #include "wtf/Vector.h" | 15 #include "wtf/Vector.h" |
16 | 16 |
17 namespace blink { | 17 namespace blink { |
18 | 18 |
19 class ExceptionState; | 19 class ExceptionState; |
20 class IntersectionObserverCallback; | 20 class IntersectionObserverCallback; |
21 class IntersectionObserverInit; | 21 class IntersectionObserverInit; |
22 | 22 |
23 // TODO(oilpan): Switch to GarbageCollected<> after oilpan ships | 23 // TODO(oilpan): Switch to GarbageCollected<> after oilpan ships |
24 class IntersectionObserver final : public GarbageCollectedFinalized<Intersection
Observer>, public ScriptWrappable { | 24 class IntersectionObserver final : public GarbageCollectedFinalized<Intersection
Observer>, public ScriptWrappable { |
25 DEFINE_WRAPPERTYPEINFO(); | 25 DEFINE_WRAPPERTYPEINFO(); |
26 | 26 |
27 public: | 27 public: |
28 static IntersectionObserver* create(const IntersectionObserverInit&, Interse
ctionObserverCallback&, ExceptionState&); | 28 static IntersectionObserver* create(const IntersectionObserverInit&, Interse
ctionObserverCallback&, ExceptionState&); |
29 static void resumeSuspendedObservers(); | 29 static void resumeSuspendedObservers(); |
30 static void rootDisappearedCallback(Visitor*, void*); | |
31 | 30 |
32 // API methods | 31 // API methods |
33 void observe(Element*, ExceptionState&); | 32 void observe(Element*, ExceptionState&); |
34 void unobserve(Element*, ExceptionState&); | 33 void unobserve(Element*, ExceptionState&); |
35 HeapVector<Member<IntersectionObserverEntry>> takeRecords(); | 34 HeapVector<Member<IntersectionObserverEntry>> takeRecords(); |
36 | 35 |
37 Node* root() const { return m_root.get(); } | 36 Node* root() const { return m_root.get(); } |
38 LayoutObject* rootLayoutObject() const; | 37 LayoutObject* rootLayoutObject() const; |
39 bool hasPercentMargin() const; | 38 bool hasPercentMargin() const; |
40 const Length& topMargin() const { return m_topMargin; } | 39 const Length& topMargin() const { return m_topMargin; } |
41 const Length& rightMargin() const { return m_rightMargin; } | 40 const Length& rightMargin() const { return m_rightMargin; } |
42 const Length& bottomMargin() const { return m_bottomMargin; } | 41 const Length& bottomMargin() const { return m_bottomMargin; } |
43 const Length& leftMargin() const { return m_leftMargin; } | 42 const Length& leftMargin() const { return m_leftMargin; } |
44 bool isDescendantOfRoot(const Element*) const; | 43 bool isDescendantOfRoot(const Element*) const; |
45 void computeIntersectionObservations(double timestamp); | 44 void computeIntersectionObservations(double timestamp); |
46 void enqueueIntersectionObserverEntry(IntersectionObserverEntry&); | 45 void enqueueIntersectionObserverEntry(IntersectionObserverEntry&); |
47 void applyRootMargin(LayoutRect&) const; | 46 void applyRootMargin(LayoutRect&) const; |
48 unsigned firstThresholdGreaterThan(float ratio) const; | 47 unsigned firstThresholdGreaterThan(float ratio) const; |
49 void deliver(); | 48 void deliver(); |
50 void setActive(bool); | 49 void setActive(bool); |
51 void disconnect(); | 50 void disconnect(); |
52 void removeObservation(IntersectionObservation&); | 51 void removeObservation(IntersectionObservation&); |
53 bool hasEntries() const { return m_entries.size(); } | 52 bool hasEntries() const { return m_entries.size(); } |
54 | 53 |
55 DECLARE_TRACE(); | 54 DECLARE_TRACE(); |
56 | 55 |
57 private: | 56 private: |
58 explicit IntersectionObserver(IntersectionObserverCallback&, Node&, const Ve
ctor<Length>& rootMargin, const Vector<float>& thresholds); | 57 explicit IntersectionObserver(IntersectionObserverCallback&, Node&, const Ve
ctor<Length>& rootMargin, const Vector<float>& thresholds); |
59 | 58 |
| 59 void checkRootAndDetachIfNeeded(); |
| 60 |
60 Member<IntersectionObserverCallback> m_callback; | 61 Member<IntersectionObserverCallback> m_callback; |
61 WeakPtrWillBeWeakMember<Node> m_root; | 62 WeakPtrWillBeWeakMember<Node> m_root; |
62 HeapHashSet<WeakMember<IntersectionObservation>> m_observations; | 63 HeapHashSet<WeakMember<IntersectionObservation>> m_observations; |
63 HeapVector<Member<IntersectionObserverEntry>> m_entries; | 64 HeapVector<Member<IntersectionObserverEntry>> m_entries; |
64 Vector<float> m_thresholds; | 65 Vector<float> m_thresholds; |
65 Length m_topMargin; | 66 Length m_topMargin; |
66 Length m_rightMargin; | 67 Length m_rightMargin; |
67 Length m_bottomMargin; | 68 Length m_bottomMargin; |
68 Length m_leftMargin; | 69 Length m_leftMargin; |
69 }; | 70 }; |
70 | 71 |
71 } // namespace blink | 72 } // namespace blink |
72 | 73 |
73 #endif // IntersectionObserver_h | 74 #endif // IntersectionObserver_h |
OLD | NEW |