third_party/WebKit/Source/core/dom/IntersectionObservation.h - Issue 2511143006: Detect change on the intersection of video and viewport.

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Issue 2511143006: Detect change on the intersection of video and viewport. (Closed)

Patch Set: Created 4 years, 1 month ago

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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"

10 #include "platform/heap/Handle.h"	9 #include "platform/heap/Handle.h"

11	10

12 namespace blink {	11 namespace blink {

13	12

14 class Element;	13 class Element;

15 class IntersectionObserver;	14 class IntersectionObserver;

16	15

17 class IntersectionObservation final	16 class IntersectionObservation final

18 : public GarbageCollected<IntersectionObservation> {	17 : public GarbageCollected<IntersectionObservation> {

19 public:	18 public:

20 IntersectionObservation(IntersectionObserver&,	19 IntersectionObservation(IntersectionObserver&,

21 Element&,	20 Element&,

22 bool shouldReportRootBounds);	21 bool shouldReportRootBounds);

23	22

24 struct IntersectionGeometry {

25 LayoutRect targetRect;

26 LayoutRect intersectionRect;

27 LayoutRect rootRect;

28 bool doesIntersect;

29

30 IntersectionGeometry() : doesIntersect(false) {}

31 };

32

33 IntersectionObserver& observer() const { return *m_observer; }	23 IntersectionObserver& observer() const { return *m_observer; }

34 Element* target() const { return m_target; }	24 Element* target() const { return m_target; }

35 unsigned lastThresholdIndex() const { return m_lastThresholdIndex; }	25 unsigned lastThresholdIndex() const { return m_lastThresholdIndex; }

36 void setLastThresholdIndex(unsigned index) { m_lastThresholdIndex = index; }	26 void setLastThresholdIndex(unsigned index) { m_lastThresholdIndex = index; }

37 bool shouldReportRootBounds() const { return m_shouldReportRootBounds; }	27 bool shouldReportRootBounds() const { return m_shouldReportRootBounds; }

38 void computeIntersectionObservations(DOMHighResTimeStamp);	28 void computeIntersectionObservations(DOMHighResTimeStamp);

39 void disconnect();	29 void disconnect();

40 void clearRootAndRemoveFromTarget();	30 void clearRootAndRemoveFromTarget();

41	31

42 DECLARE_TRACE();	32 DECLARE_TRACE();

43	33

44 private:	34 private:

45 void applyRootMargin(LayoutRect&) const;

46 void initializeGeometry(IntersectionGeometry&) const;

47 void initializeTargetRect(LayoutRect&) const;

48 void initializeRootRect(LayoutRect&) const;

49 void clipToRoot(IntersectionGeometry&) const;

50 void mapTargetRectToTargetFrameCoordinates(LayoutRect&) const;

51 void mapRootRectToRootFrameCoordinates(LayoutRect&) const;

52 void mapRootRectToTargetFrameCoordinates(LayoutRect&) const;

53 bool computeGeometry(IntersectionGeometry&) const;

54

55 Member<IntersectionObserver> m_observer;	35 Member<IntersectionObserver> m_observer;

56

57 WeakMember<Element> m_target;	36 WeakMember<Element> m_target;

58	37

59 unsigned m_shouldReportRootBounds : 1;	38 unsigned m_shouldReportRootBounds : 1;

60 unsigned m_lastThresholdIndex : 30;	39 unsigned m_lastThresholdIndex : 30;

61 };	40 };

62	41

63 } // namespace blink	42 } // namespace blink

64	43

65 #endif // IntersectionObservation_h	44 #endif // IntersectionObservation_h

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