1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130
|
/*
* Copyright (C) 2020 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "PseudoClassChangeInvalidation.h"
#include "ElementChildIteratorInlines.h"
#include "ElementRareData.h"
#include "StyleInvalidationFunctions.h"
namespace WebCore {
namespace Style {
Vector<PseudoClassInvalidationKey, 4> makePseudoClassInvalidationKeys(CSSSelector::PseudoClassType pseudoClass, const Element& element)
{
Vector<PseudoClassInvalidationKey, 4> keys;
if (!element.idForStyleResolution().isEmpty())
keys.append(makePseudoClassInvalidationKey(pseudoClass, InvalidationKeyType::Id, element.idForStyleResolution()));
if (element.hasClass()) {
auto classCount = element.classNames().size();
for (size_t i = 0; i < classCount; ++i)
keys.append(makePseudoClassInvalidationKey(pseudoClass, InvalidationKeyType::Class, element.classNames()[i]));
}
keys.append(makePseudoClassInvalidationKey(pseudoClass, InvalidationKeyType::Tag, element.localNameLowercase()));
keys.append(makePseudoClassInvalidationKey(pseudoClass, InvalidationKeyType::Universal));
return keys;
};
void PseudoClassChangeInvalidation::computeInvalidation(CSSSelector::PseudoClassType pseudoClass, Value value, InvalidationScope invalidationScope)
{
bool shouldInvalidateCurrent = false;
bool mayAffectStyleInShadowTree = false;
traverseRuleFeatures(m_element, [&] (const RuleFeatureSet& features, bool mayAffectShadowTree) {
if (mayAffectShadowTree && features.pseudoClassTypes.contains(pseudoClass))
mayAffectStyleInShadowTree = true;
if (m_element.shadowRoot() && features.pseudoClassesAffectingHost.contains(pseudoClass))
shouldInvalidateCurrent = true;
});
if (mayAffectStyleInShadowTree) {
// FIXME: We should do fine-grained invalidation for shadow tree.
m_element.invalidateStyleForSubtree();
}
if (shouldInvalidateCurrent)
m_element.invalidateStyle();
for (auto& key : makePseudoClassInvalidationKeys(pseudoClass, m_element))
collectRuleSets(key, value, invalidationScope);
}
void PseudoClassChangeInvalidation::collectRuleSets(const PseudoClassInvalidationKey& key, Value value, InvalidationScope invalidationScope)
{
auto& ruleSets = m_element.styleResolver().ruleSets();
auto* invalidationRuleSets = ruleSets.pseudoClassInvalidationRuleSets(key);
if (!invalidationRuleSets)
return;
for (auto& invalidationRuleSet : *invalidationRuleSets) {
// For focus/hover we flip the whole ancestor chain. We only need to do deep invalidation traversal in the change root.
auto shouldInvalidate = [&] {
bool invalidatesAllDescendants = invalidationRuleSet.matchElement == MatchElement::Ancestor && isUniversalInvalidation(key);
switch (invalidationScope) {
case InvalidationScope::All:
return true;
case InvalidationScope::SelfChildrenAndSiblings:
return !invalidatesAllDescendants;
case InvalidationScope::Descendants:
return invalidatesAllDescendants;
}
ASSERT_NOT_REACHED();
return true;
}();
if (!shouldInvalidate)
continue;
if (value == Value::Any) {
Invalidator::addToMatchElementRuleSets(m_beforeChangeRuleSets, invalidationRuleSet);
Invalidator::addToMatchElementRuleSets(m_afterChangeRuleSets, invalidationRuleSet);
continue;
}
bool invalidateBeforeChange = invalidationRuleSet.isNegation == IsNegation::Yes ? value == Value::True : value == Value::False;
if (invalidateBeforeChange)
Invalidator::addToMatchElementRuleSets(m_beforeChangeRuleSets, invalidationRuleSet);
else
Invalidator::addToMatchElementRuleSets(m_afterChangeRuleSets, invalidationRuleSet);
}
}
void PseudoClassChangeInvalidation::invalidateBeforeChange()
{
Invalidator::invalidateWithMatchElementRuleSets(m_element, m_beforeChangeRuleSets);
}
void PseudoClassChangeInvalidation::invalidateAfterChange()
{
Invalidator::invalidateWithMatchElementRuleSets(m_element, m_afterChangeRuleSets);
}
}
}
|