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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 IntersectionObservation_h | 5 #ifndef IntersectionObservation_h |
6 #define IntersectionObservation_h | 6 #define IntersectionObservation_h |
7 | 7 |
8 #include "core/dom/DOMHighResTimeStamp.h" | 8 #include "core/dom/DOMHighResTimeStamp.h" |
9 #include "platform/geometry/LayoutRect.h" | 9 #include "platform/geometry/LayoutRect.h" |
10 #include "platform/heap/Handle.h" | 10 #include "platform/heap/Handle.h" |
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21 IntersectionObservation(IntersectionObserver&, Element&, bool shouldReportRo
otBounds); | 21 IntersectionObservation(IntersectionObserver&, Element&, bool shouldReportRo
otBounds); |
22 | 22 |
23 struct IntersectionGeometry { | 23 struct IntersectionGeometry { |
24 LayoutRect targetRect; | 24 LayoutRect targetRect; |
25 LayoutRect intersectionRect; | 25 LayoutRect intersectionRect; |
26 LayoutRect rootRect; | 26 LayoutRect rootRect; |
27 }; | 27 }; |
28 | 28 |
29 IntersectionObserver& observer() const { return *m_observer; } | 29 IntersectionObserver& observer() const { return *m_observer; } |
30 Element* target() const; | 30 Element* target() const; |
31 bool isActive() const { return m_active; } | |
32 void setActive(bool active) { m_active = active; } | |
33 unsigned lastThresholdIndex() const { return m_lastThresholdIndex; } | 31 unsigned lastThresholdIndex() const { return m_lastThresholdIndex; } |
34 void setLastThresholdIndex(unsigned index) { m_lastThresholdIndex = index; } | 32 void setLastThresholdIndex(unsigned index) { m_lastThresholdIndex = index; } |
35 bool shouldReportRootBounds() const { return m_shouldReportRootBounds; } | 33 bool shouldReportRootBounds() const { return m_shouldReportRootBounds; } |
36 void computeIntersectionObservations(DOMHighResTimeStamp); | 34 void computeIntersectionObservations(DOMHighResTimeStamp); |
37 void disconnect(); | 35 void disconnect(); |
38 void clearRootAndRemoveFromTarget(); | 36 void clearRootAndRemoveFromTarget(); |
39 | 37 |
40 DECLARE_TRACE(); | 38 DECLARE_TRACE(); |
41 | 39 |
42 private: | 40 private: |
43 void initializeGeometry(IntersectionGeometry&); | 41 void initializeGeometry(IntersectionGeometry&); |
44 void clipToRoot(LayoutRect&); | 42 void clipToRoot(LayoutRect&); |
45 void clipToFrameView(IntersectionGeometry&); | 43 void clipToFrameView(IntersectionGeometry&); |
46 bool computeGeometry(IntersectionGeometry&); | 44 bool computeGeometry(IntersectionGeometry&); |
47 | 45 |
48 Member<IntersectionObserver> m_observer; | 46 Member<IntersectionObserver> m_observer; |
49 | 47 |
50 // TODO(szager): Why Node instead of Element? Because NodeIntersectionObser
verData::createWeakPtr() | 48 // TODO(szager): Why Node instead of Element? Because NodeIntersectionObser
verData::createWeakPtr() |
51 // returns a WeakPtr<Node>, which cannot be coerced into a WeakPtr<Element>.
When oilpan rolls out, | 49 // returns a WeakPtr<Node>, which cannot be coerced into a WeakPtr<Element>.
When oilpan rolls out, |
52 // this can be changed to WeakMember<Element>. | 50 // this can be changed to WeakMember<Element>. |
53 WeakPtrWillBeWeakMember<Node> m_target; | 51 WeakPtrWillBeWeakMember<Node> m_target; |
54 | 52 |
55 unsigned m_active : 1; | |
56 unsigned m_shouldReportRootBounds : 1; | 53 unsigned m_shouldReportRootBounds : 1; |
57 unsigned m_lastThresholdIndex : 30; | 54 unsigned m_lastThresholdIndex : 30; |
58 }; | 55 }; |
59 | 56 |
60 } // namespace blink | 57 } // namespace blink |
61 | 58 |
62 #endif // IntersectionObservation_h | 59 #endif // IntersectionObservation_h |
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