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1 /* | 1 /* |
2 * Copyright (C) 2012 Google Inc. All rights reserved. | 2 * Copyright (C) 2012 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 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. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 */ | 29 */ |
30 | 30 |
31 #include "config.h" | 31 #include "config.h" |
32 #include "core/dom/shadow/SelectRuleFeatureSet.h" | 32 #include "core/dom/shadow/SelectRuleFeatureSet.h" |
33 | 33 |
34 #include "core/css/CSSSelector.h" | 34 #include "core/css/CSSSelector.h" |
35 | 35 |
| 36 #include "wtf/BitVector.h" |
| 37 |
36 namespace WebCore { | 38 namespace WebCore { |
37 | 39 |
38 SelectRuleFeatureSet::SelectRuleFeatureSet() | 40 SelectRuleFeatureSet::SelectRuleFeatureSet() |
39 : m_featureFlags(0) | 41 : m_featureFlags(0) |
40 { | 42 { |
41 } | 43 } |
42 | 44 |
43 void SelectRuleFeatureSet::add(const SelectRuleFeatureSet& featureSet) | 45 void SelectRuleFeatureSet::add(const SelectRuleFeatureSet& featureSet) |
44 { | 46 { |
45 m_cssRuleFeatureSet.add(featureSet.m_cssRuleFeatureSet); | 47 m_cssRuleFeatureSet.add(featureSet.m_cssRuleFeatureSet); |
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76 setSelectRuleFeature(AffectedSelectorTarget); | 78 setSelectRuleFeature(AffectedSelectorTarget); |
77 break; | 79 break; |
78 case CSSSelector::PseudoVisited: | 80 case CSSSelector::PseudoVisited: |
79 setSelectRuleFeature(AffectedSelectorVisited); | 81 setSelectRuleFeature(AffectedSelectorVisited); |
80 break; | 82 break; |
81 default: | 83 default: |
82 break; | 84 break; |
83 } | 85 } |
84 } | 86 } |
85 | 87 |
| 88 bool SelectRuleFeatureSet::checkSelectorsForClassChange(const SpaceSplitString&
changedClasses) const |
| 89 { |
| 90 unsigned changedSize = changedClasses.size(); |
| 91 for (unsigned i = 0; i < changedSize; ++i) { |
| 92 if (hasSelectorForClass(changedClasses[i])) |
| 93 return true; |
| 94 } |
| 95 return false; |
| 96 } |
| 97 |
| 98 bool SelectRuleFeatureSet::checkSelectorsForClassChange(const SpaceSplitString&
oldClasses, const SpaceSplitString& newClasses) const |
| 99 { |
| 100 if (!oldClasses.size()) |
| 101 return checkSelectorsForClassChange(newClasses); |
| 102 |
| 103 // Class vectors tend to be very short. This is faster than using a hash tab
le. |
| 104 BitVector remainingClassBits; |
| 105 remainingClassBits.ensureSize(oldClasses.size()); |
| 106 |
| 107 for (unsigned i = 0; i < newClasses.size(); ++i) { |
| 108 bool found = false; |
| 109 for (unsigned j = 0; j < oldClasses.size(); ++j) { |
| 110 if (newClasses[i] == oldClasses[j]) { |
| 111 // Mark each class that is still in the newClasses so we can ski
p doing |
| 112 // an n^2 search below when looking for removals. We can't break
from |
| 113 // this loop early since a class can appear more than once. |
| 114 remainingClassBits.quickSet(j); |
| 115 found = true; |
| 116 } |
| 117 } |
| 118 // Class was added. |
| 119 if (!found) { |
| 120 if (hasSelectorForClass(newClasses[i])) |
| 121 return true; |
| 122 } |
| 123 } |
| 124 |
| 125 for (unsigned i = 0; i < oldClasses.size(); ++i) { |
| 126 if (remainingClassBits.quickGet(i)) |
| 127 continue; |
| 128 |
| 129 // Class was removed. |
| 130 if (hasSelectorForClass(oldClasses[i])) |
| 131 return true; |
| 132 } |
| 133 return false; |
| 134 } |
| 135 |
86 } | 136 } |
87 | 137 |
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