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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 IntersectionObserver_h | 5 #ifndef IntersectionObserver_h |
6 #define IntersectionObserver_h | 6 #define IntersectionObserver_h |
7 | 7 |
8 #include "bindings/core/v8/ExceptionStatePlaceholder.h" | 8 #include "bindings/core/v8/ExceptionStatePlaceholder.h" |
9 #include "bindings/core/v8/ScriptWrappable.h" | 9 #include "bindings/core/v8/ScriptWrappable.h" |
10 #include "core/dom/IntersectionObservation.h" | 10 #include "core/dom/IntersectionObservation.h" |
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26 class CORE_EXPORT IntersectionObserver final | 26 class CORE_EXPORT IntersectionObserver final |
27 : public GarbageCollectedFinalized<IntersectionObserver>, | 27 : public GarbageCollectedFinalized<IntersectionObserver>, |
28 public ScriptWrappable { | 28 public ScriptWrappable { |
29 DEFINE_WRAPPERTYPEINFO(); | 29 DEFINE_WRAPPERTYPEINFO(); |
30 | 30 |
31 public: | 31 public: |
32 using EventCallback = | 32 using EventCallback = |
33 Function<void(const HeapVector<Member<IntersectionObserverEntry>>&), | 33 Function<void(const HeapVector<Member<IntersectionObserverEntry>>&), |
34 WTF::SameThreadAffinity>; | 34 WTF::SameThreadAffinity>; |
35 | 35 |
36 // Defines the assumed initial state of the observed element. If the actual | |
37 // state is the same as the initial state, then no observation will be | |
38 // delivered. AUTO means the initial observation will always get sent. | |
39 enum class InitialState { | |
40 // TODO(skyostil): Add support for HIDDEN and VISIBLE. | |
41 AUTO | |
ojan
2016/10/31 19:37:09
The new enum naming style would be kAuto now I thi
Sami
2016/11/01 10:44:48
Done.
| |
42 }; | |
43 | |
36 static IntersectionObserver* create(const IntersectionObserverInit&, | 44 static IntersectionObserver* create(const IntersectionObserverInit&, |
37 IntersectionObserverCallback&, | 45 IntersectionObserverCallback&, |
38 ExceptionState&); | 46 ExceptionState&); |
39 static IntersectionObserver* create(const Vector<Length>& rootMargin, | 47 static IntersectionObserver* create(const Vector<Length>& rootMargin, |
40 const Vector<float>& thresholds, | 48 const Vector<float>& thresholds, |
41 Document*, | 49 Document*, |
42 std::unique_ptr<EventCallback>, | 50 std::unique_ptr<EventCallback>, |
43 ExceptionState& = ASSERT_NO_EXCEPTION); | 51 ExceptionState& = ASSERT_NO_EXCEPTION); |
44 static void resumeSuspendedObservers(); | 52 static void resumeSuspendedObservers(); |
45 | 53 |
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64 void enqueueIntersectionObserverEntry(IntersectionObserverEntry&); | 72 void enqueueIntersectionObserverEntry(IntersectionObserverEntry&); |
65 void applyRootMargin(LayoutRect&) const; | 73 void applyRootMargin(LayoutRect&) const; |
66 unsigned firstThresholdGreaterThan(float ratio) const; | 74 unsigned firstThresholdGreaterThan(float ratio) const; |
67 void deliver(); | 75 void deliver(); |
68 void removeObservation(IntersectionObservation&); | 76 void removeObservation(IntersectionObservation&); |
69 bool hasEntries() const { return m_entries.size(); } | 77 bool hasEntries() const { return m_entries.size(); } |
70 const HeapLinkedHashSet<WeakMember<IntersectionObservation>>& observations() | 78 const HeapLinkedHashSet<WeakMember<IntersectionObservation>>& observations() |
71 const { | 79 const { |
72 return m_observations; | 80 return m_observations; |
73 } | 81 } |
82 // TODO(skyostil): Move this setting to IntersectionObserverInit once the API | |
83 // is finalized. | |
84 void setInitialState(InitialState); | |
74 | 85 |
75 DECLARE_TRACE(); | 86 DECLARE_TRACE(); |
76 | 87 |
77 private: | 88 private: |
78 explicit IntersectionObserver(IntersectionObserverCallback&, | 89 explicit IntersectionObserver(IntersectionObserverCallback&, |
79 Node&, | 90 Node&, |
80 const Vector<Length>& rootMargin, | 91 const Vector<Length>& rootMargin, |
81 const Vector<float>& thresholds); | 92 const Vector<float>& thresholds); |
82 void clearWeakMembers(Visitor*); | 93 void clearWeakMembers(Visitor*); |
83 | 94 |
84 Member<IntersectionObserverCallback> m_callback; | 95 Member<IntersectionObserverCallback> m_callback; |
85 WeakMember<Node> m_root; | 96 WeakMember<Node> m_root; |
86 HeapLinkedHashSet<WeakMember<IntersectionObservation>> m_observations; | 97 HeapLinkedHashSet<WeakMember<IntersectionObservation>> m_observations; |
87 HeapVector<Member<IntersectionObserverEntry>> m_entries; | 98 HeapVector<Member<IntersectionObserverEntry>> m_entries; |
88 Vector<float> m_thresholds; | 99 Vector<float> m_thresholds; |
89 Length m_topMargin; | 100 Length m_topMargin; |
90 Length m_rightMargin; | 101 Length m_rightMargin; |
91 Length m_bottomMargin; | 102 Length m_bottomMargin; |
92 Length m_leftMargin; | 103 Length m_leftMargin; |
93 }; | 104 }; |
94 | 105 |
95 } // namespace blink | 106 } // namespace blink |
96 | 107 |
97 #endif // IntersectionObserver_h | 108 #endif // IntersectionObserver_h |
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