sky/engine/core/css/invalidation/DescendantInvalidationSet.h - Issue 712173002: Remove StyleInvalidator machinery.

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Issue 712173002: Remove StyleInvalidator machinery. (Closed) Base URL: git@github.com:domokit/mojo.git@master

Patch Set: Created 6 years, 1 month ago

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1 /*

2 * Copyright (C) 2014 Google Inc. All rights reserved.

3 *

4 * Redistribution and use in source and binary forms, with or without

5 * modification, are permitted provided that the following conditions are

6 * met:

7 *

8 * * Redistributions of source code must retain the above copyright

9 * notice, this list of conditions and the following disclaimer.

10 * * Redistributions in binary form must reproduce the above

11 * copyright notice, this list of conditions and the following disclaimer

12 * in the documentation and/or other materials provided with the

13 * distribution.

14 * * Neither the name of Google Inc. nor the names of its

15 * contributors may be used to endorse or promote products derived from

16 * this software without specific prior written permission.

17 *

18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

29 */

30

31 #ifndef DescendantInvalidationSet_h

32 #define DescendantInvalidationSet_h

33

34 #include "platform/heap/Handle.h"

35 #include "wtf/Forward.h"

36 #include "wtf/HashSet.h"

37 #include "wtf/RefCounted.h"

38 #include "wtf/RefPtr.h"

39 #include "wtf/text/AtomicStringHash.h"

40 #include "wtf/text/StringHash.h"

41

42 namespace blink {

43

44 class Element;

45

46 // Tracks data to determine which elements of a DOM subtree need to have style

47 // recalculated.

48 class DescendantInvalidationSet final : public RefCounted<DescendantInvalidation Set> {

49 public:

50 static PassRefPtr<DescendantInvalidationSet> create()

51 {

52 return adoptRef(new DescendantInvalidationSet);

53 }

54

55 bool invalidatesElement(Element&) const;

56

57 void combine(const DescendantInvalidationSet& other);

58

59 void addClass(const AtomicString& className);

60 void addId(const AtomicString& id);

61 void addTagName(const AtomicString& tagName);

62 void addAttribute(const AtomicString& attributeLocalName);

63

64 void setWholeSubtreeInvalid();

65 bool wholeSubtreeInvalid() const { return m_allDescendantsMightBeInvalid; }

66

67 void setTreeBoundaryCrossing() { m_treeBoundaryCrossing = true; }

68 bool treeBoundaryCrossing() const { return m_treeBoundaryCrossing; }

69

70 void setCustomPseudoInvalid() { m_customPseudoInvalid = true; }

71 bool customPseudoInvalid() const { return m_customPseudoInvalid; }

72

73 bool isEmpty() const { return !m_classes && !m_ids && !m_tagNames && !m_attr ibutes; }

74

75 void trace(Visitor*);

76

77 #ifndef NDEBUG

78 void show() const;

79 #endif

80

81 private:

82 DescendantInvalidationSet();

83

84 HashSet<AtomicString>& ensureClassSet();

85 HashSet<AtomicString>& ensureIdSet();

86 HashSet<AtomicString>& ensureTagNameSet();

87 HashSet<AtomicString>& ensureAttributeSet();

88

89 // FIXME: optimize this if it becomes a memory issue.

90 OwnPtr<HashSet<AtomicString> > m_classes;

91 OwnPtr<HashSet<AtomicString> > m_ids;

92 OwnPtr<HashSet<AtomicString> > m_tagNames;

93 OwnPtr<HashSet<AtomicString> > m_attributes;

94

95 // If true, all descendants might be invalidated, so a full subtree recalc i s required.

96 unsigned m_allDescendantsMightBeInvalid : 1;

97

98 // If true, all descendants which are custom pseudo elements must be invalid ated.

99 unsigned m_customPseudoInvalid : 1;

100

101 // If true, the invalidation must traverse into ShadowRoots with this set.

102 unsigned m_treeBoundaryCrossing : 1;

103 };

104

105 } // namespace blink

106

107 #endif // DescendantInvalidationSet_h

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