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1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "platform/geometry/LayoutRect.h" | |
6 #include "platform/heap/Handle.h" | |
7 | |
8 #ifndef IntersectionObservation_h | |
9 #define IntersectionObservation_h | |
10 | |
11 namespace blink { | |
12 | |
13 class Element; | |
14 class IntersectionObserver; | |
15 | |
16 class IntersectionObservation : public GarbageCollectedFinalized<IntersectionObs ervation> { | |
17 public: | |
18 IntersectionObservation(IntersectionObserver&, Element&, bool shouldReportRo otBounds); | |
haraken
2015/12/22 01:13:30
Can we add a destructor and add ASSERT(!m_target)?
szager1
2015/12/22 07:53:41
It should be OK to destruct an IntersectionObserva
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19 | |
20 struct IntersectionGeometry { | |
21 LayoutRect targetRect; | |
22 LayoutRect intersectionRect; | |
23 LayoutRect rootRect; | |
24 }; | |
25 | |
26 const IntersectionObserver* observer() const { return m_observer; } | |
27 IntersectionObserver* observer() { return m_observer; } | |
esprehn
2015/12/22 07:50:32
can these ever be null?
szager1
2015/12/22 08:49:50
No, switched to reference.
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28 const Element* target() const { return m_target.get(); } | |
29 Element* target() { return m_target.get(); } | |
30 bool isActive() const { return m_active; } | |
31 void setActive(bool active) { m_active = active; } | |
32 unsigned lastThresholdIndex() const { return m_lastThresholdIndex; } | |
33 void setLastThresholdIndex(unsigned index) { m_lastThresholdIndex = index; } | |
34 bool shouldReportRootBounds() const { return m_shouldReportRootBounds; } | |
35 | |
36 void computeIntersectionObservations(double timestamp); | |
37 void disconnect(); | |
38 | |
39 DECLARE_TRACE(); | |
40 | |
41 private: | |
42 void initializeGeometry(IntersectionGeometry&); | |
43 void clipToRoot(LayoutRect&); | |
44 void clipToFrameView(IntersectionGeometry&); | |
45 bool computeGeometry(IntersectionGeometry&); | |
46 | |
47 Member<IntersectionObserver> m_observer; | |
48 WeakPtrWillBeWeakMember<Element> m_target; | |
haraken
2015/12/22 01:13:30
In oilpan, why does this need to be a WeakMember?
szager1
2015/12/22 07:53:41
The IntersectionObservation should not
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49 unsigned m_active : 1; | |
50 unsigned m_shouldReportRootBounds : 1; | |
51 unsigned m_lastThresholdIndex : 30; | |
52 }; | |
53 | |
54 } // namespace blink { | |
55 | |
56 #endif // IntersectionObservation_h | |
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