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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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31 unsigned lastThresholdIndex() const { return m_lastThresholdIndex; } | 31 unsigned lastThresholdIndex() const { return m_lastThresholdIndex; } |
32 void setLastThresholdIndex(unsigned index) { m_lastThresholdIndex = index; } | 32 void setLastThresholdIndex(unsigned index) { m_lastThresholdIndex = index; } |
33 bool shouldReportRootBounds() const { return m_shouldReportRootBounds; } | 33 bool shouldReportRootBounds() const { return m_shouldReportRootBounds; } |
34 void computeIntersectionObservations(DOMHighResTimeStamp); | 34 void computeIntersectionObservations(DOMHighResTimeStamp); |
35 void disconnect(); | 35 void disconnect(); |
36 void clearRootAndRemoveFromTarget(); | 36 void clearRootAndRemoveFromTarget(); |
37 | 37 |
38 DECLARE_TRACE(); | 38 DECLARE_TRACE(); |
39 | 39 |
40 private: | 40 private: |
41 void initializeGeometry(IntersectionGeometry&); | 41 void applyRootMargin(LayoutRect&) const; |
42 void clipToRoot(LayoutRect&); | 42 void initializeGeometry(IntersectionGeometry&) const; |
43 void clipToFrameView(IntersectionGeometry&); | 43 void clipToRoot(LayoutRect&) const; |
44 bool computeGeometry(IntersectionGeometry&); | 44 void clipToFrameView(IntersectionGeometry&) const; |
| 45 bool computeGeometry(IntersectionGeometry&) const; |
45 | 46 |
46 Member<IntersectionObserver> m_observer; | 47 Member<IntersectionObserver> m_observer; |
47 | 48 |
48 // TODO(szager): Why Node instead of Element? Because NodeIntersectionObser
verData::createWeakPtr() | 49 // TODO(szager): Why Node instead of Element? Because NodeIntersectionObser
verData::createWeakPtr() |
49 // returns a WeakPtr<Node>, which cannot be coerced into a WeakPtr<Element>.
When oilpan rolls out, | 50 // returns a WeakPtr<Node>, which cannot be coerced into a WeakPtr<Element>.
When oilpan rolls out, |
50 // this can be changed to WeakMember<Element>. | 51 // this can be changed to WeakMember<Element>. |
51 WeakPtrWillBeWeakMember<Node> m_target; | 52 WeakPtrWillBeWeakMember<Node> m_target; |
52 | 53 |
53 unsigned m_shouldReportRootBounds : 1; | 54 unsigned m_shouldReportRootBounds : 1; |
54 unsigned m_lastThresholdIndex : 30; | 55 unsigned m_lastThresholdIndex : 30; |
55 }; | 56 }; |
56 | 57 |
57 } // namespace blink | 58 } // namespace blink |
58 | 59 |
59 #endif // IntersectionObservation_h | 60 #endif // IntersectionObservation_h |
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