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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 "platform/geometry/LayoutRect.h" | 9 #include "platform/geometry/LayoutRect.h" |
9 #include "platform/heap/Handle.h" | 10 #include "platform/heap/Handle.h" |
10 | 11 |
11 namespace blink { | 12 namespace blink { |
12 | 13 |
13 class Element; | 14 class Element; |
14 class IntersectionObserver; | 15 class IntersectionObserver; |
15 class Node; | 16 class Node; |
16 | 17 |
17 // TODO(oilpan): Switch to GarbageCollected<> after oilpan ships. | 18 // TODO(oilpan): Switch to GarbageCollected<> after oilpan ships. |
18 class IntersectionObservation : public GarbageCollectedFinalized<IntersectionObs
ervation> { | 19 class IntersectionObservation : public GarbageCollectedFinalized<IntersectionObs
ervation> { |
19 public: | 20 public: |
20 IntersectionObservation(IntersectionObserver&, Element&, bool shouldReportRo
otBounds); | 21 IntersectionObservation(IntersectionObserver&, Element&, bool shouldReportRo
otBounds); |
21 | 22 |
22 struct IntersectionGeometry { | 23 struct IntersectionGeometry { |
23 LayoutRect targetRect; | 24 LayoutRect targetRect; |
24 LayoutRect intersectionRect; | 25 LayoutRect intersectionRect; |
25 LayoutRect rootRect; | 26 LayoutRect rootRect; |
26 }; | 27 }; |
27 | 28 |
28 IntersectionObserver& observer() const { return *m_observer; } | 29 IntersectionObserver& observer() const { return *m_observer; } |
29 Element* target() const; | 30 Element* target() const; |
30 bool isActive() const { return m_active; } | 31 bool isActive() const { return m_active; } |
31 void setActive(bool active) { m_active = active; } | 32 void setActive(bool active) { m_active = active; } |
32 unsigned lastThresholdIndex() const { return m_lastThresholdIndex; } | 33 unsigned lastThresholdIndex() const { return m_lastThresholdIndex; } |
33 void setLastThresholdIndex(unsigned index) { m_lastThresholdIndex = index; } | 34 void setLastThresholdIndex(unsigned index) { m_lastThresholdIndex = index; } |
34 bool shouldReportRootBounds() const { return m_shouldReportRootBounds; } | 35 bool shouldReportRootBounds() const { return m_shouldReportRootBounds; } |
35 void computeIntersectionObservations(double timestamp); | 36 void computeIntersectionObservations(DOMHighResTimeStamp); |
36 void disconnect(); | 37 void disconnect(); |
37 void clearRootAndRemoveFromTarget(); | 38 void clearRootAndRemoveFromTarget(); |
38 | 39 |
39 DECLARE_TRACE(); | 40 DECLARE_TRACE(); |
40 | 41 |
41 private: | 42 private: |
42 void initializeGeometry(IntersectionGeometry&); | 43 void initializeGeometry(IntersectionGeometry&); |
43 void clipToRoot(LayoutRect&); | 44 void clipToRoot(LayoutRect&); |
44 void clipToFrameView(IntersectionGeometry&); | 45 void clipToFrameView(IntersectionGeometry&); |
45 bool computeGeometry(IntersectionGeometry&); | 46 bool computeGeometry(IntersectionGeometry&); |
46 | 47 |
47 Member<IntersectionObserver> m_observer; | 48 Member<IntersectionObserver> m_observer; |
48 | 49 |
49 // TODO(szager): Why Node instead of Element? Because NodeIntersectionObser
verData::createWeakPtr() | 50 // TODO(szager): Why Node instead of Element? Because NodeIntersectionObser
verData::createWeakPtr() |
50 // returns a WeakPtr<Node>, which cannot be coerced into a WeakPtr<Element>.
When oilpan rolls out, | 51 // returns a WeakPtr<Node>, which cannot be coerced into a WeakPtr<Element>.
When oilpan rolls out, |
51 // this can be changed to WeakMember<Element>. | 52 // this can be changed to WeakMember<Element>. |
52 WeakPtrWillBeWeakMember<Node> m_target; | 53 WeakPtrWillBeWeakMember<Node> m_target; |
53 | 54 |
54 unsigned m_active : 1; | 55 unsigned m_active : 1; |
55 unsigned m_shouldReportRootBounds : 1; | 56 unsigned m_shouldReportRootBounds : 1; |
56 unsigned m_lastThresholdIndex : 30; | 57 unsigned m_lastThresholdIndex : 30; |
57 }; | 58 }; |
58 | 59 |
59 } // namespace blink | 60 } // namespace blink |
60 | 61 |
61 #endif // IntersectionObservation_h | 62 #endif // IntersectionObservation_h |
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