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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/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" |
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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 | 30 |
31 // API methods | 31 // API methods |
32 void observe(Element*, ExceptionState&); | 32 void observe(Element*); |
33 void unobserve(Element*, ExceptionState&); | 33 void unobserve(Element*); |
| 34 void disconnect(); |
34 HeapVector<Member<IntersectionObserverEntry>> takeRecords(); | 35 HeapVector<Member<IntersectionObserverEntry>> takeRecords(); |
35 Element* root() const; | 36 Element* root() const; |
36 String rootMargin() const; | 37 String rootMargin() const; |
37 const Vector<float>& thresholds() const { return m_thresholds; } | 38 const Vector<float>& thresholds() const { return m_thresholds; } |
38 | 39 |
39 Node* rootNode() const { return m_root.get(); } | 40 Node* rootNode() const { return m_root.get(); } |
40 LayoutObject* rootLayoutObject() const; | 41 LayoutObject* rootLayoutObject() const; |
41 bool hasPercentMargin() const; | |
42 const Length& topMargin() const { return m_topMargin; } | 42 const Length& topMargin() const { return m_topMargin; } |
43 const Length& rightMargin() const { return m_rightMargin; } | 43 const Length& rightMargin() const { return m_rightMargin; } |
44 const Length& bottomMargin() const { return m_bottomMargin; } | 44 const Length& bottomMargin() const { return m_bottomMargin; } |
45 const Length& leftMargin() const { return m_leftMargin; } | 45 const Length& leftMargin() const { return m_leftMargin; } |
46 void computeIntersectionObservations(); | 46 void computeIntersectionObservations(); |
47 void enqueueIntersectionObserverEntry(IntersectionObserverEntry&); | 47 void enqueueIntersectionObserverEntry(IntersectionObserverEntry&); |
48 void applyRootMargin(LayoutRect&) const; | 48 void applyRootMargin(LayoutRect&) const; |
49 unsigned firstThresholdGreaterThan(float ratio) const; | 49 unsigned firstThresholdGreaterThan(float ratio) const; |
50 void deliver(); | 50 void deliver(); |
51 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 const HeapHashSet<WeakMember<IntersectionObservation>>& observations() const
{ return m_observations; } | 53 const HeapHashSet<WeakMember<IntersectionObservation>>& observations() const
{ return m_observations; } |
55 | 54 |
56 DECLARE_TRACE(); | 55 DECLARE_TRACE(); |
57 | 56 |
58 private: | 57 private: |
59 explicit IntersectionObserver(IntersectionObserverCallback&, Node&, const Ve
ctor<Length>& rootMargin, const Vector<float>& thresholds); | 58 explicit IntersectionObserver(IntersectionObserverCallback&, Node&, const Ve
ctor<Length>& rootMargin, const Vector<float>& thresholds); |
60 #if ENABLE(OILPAN) | 59 #if ENABLE(OILPAN) |
61 void clearWeakMembers(Visitor*); | 60 void clearWeakMembers(Visitor*); |
62 #endif | 61 #endif |
63 | 62 |
64 Member<IntersectionObserverCallback> m_callback; | 63 Member<IntersectionObserverCallback> m_callback; |
65 WeakPtrWillBeWeakMember<Node> m_root; | 64 WeakPtrWillBeWeakMember<Node> m_root; |
66 HeapHashSet<WeakMember<IntersectionObservation>> m_observations; | 65 HeapHashSet<WeakMember<IntersectionObservation>> m_observations; |
67 HeapVector<Member<IntersectionObserverEntry>> m_entries; | 66 HeapVector<Member<IntersectionObserverEntry>> m_entries; |
68 Vector<float> m_thresholds; | 67 Vector<float> m_thresholds; |
69 Length m_topMargin; | 68 Length m_topMargin; |
70 Length m_rightMargin; | 69 Length m_rightMargin; |
71 Length m_bottomMargin; | 70 Length m_bottomMargin; |
72 Length m_leftMargin; | 71 Length m_leftMargin; |
73 }; | 72 }; |
74 | 73 |
75 } // namespace blink | 74 } // namespace blink |
76 | 75 |
77 #endif // IntersectionObserver_h | 76 #endif // IntersectionObserver_h |
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