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f4546b7716
This now means that using a class/id/attribute selector in one scope will not cause style recalcs in other scopes in the page when something with that feature changes. It also removes an iteration over all the scopes that used to collect features. I also removed all the extra cases around adding/removing classes since the general case can handle them. In addition I removed the check for classStringHasClassName which looked to see if the string was all whitespace. This check dated way back to fixing an assert in code we don't even have anymore. Assertion fix aside all the extra check optimized for was if you wrote class=" " with no names, which will now cause an extra malloc of the SpaceSplitString::Data. This seems super rare, it makes more sense to not scan the class string every time the list of classes changes which is far more common than setting a string of only whitespace. R=ojan@chromium.org Review URL: https://codereview.chromium.org/837883002
109 lines
4.4 KiB
C++
109 lines
4.4 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
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* Copyright (C) 2012 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "sky/engine/config.h"
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#include "sky/engine/core/css/resolver/ScopedStyleResolver.h"
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#include "sky/engine/core/css/CSSStyleSheet.h"
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#include "sky/engine/core/css/RuleFeature.h"
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#include "sky/engine/core/css/StyleRule.h"
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#include "sky/engine/core/css/StyleSheetContents.h"
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#include "sky/engine/core/css/resolver/StyleResolver.h"
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#include "sky/engine/core/dom/Document.h"
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#include "sky/engine/core/dom/shadow/ElementShadow.h"
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#include "sky/engine/core/dom/shadow/ShadowRoot.h"
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#include "sky/engine/core/html/HTMLStyleElement.h"
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namespace blink {
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ScopedStyleResolver::ScopedStyleResolver(TreeScope& scope)
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: m_scope(scope)
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{
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}
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void ScopedStyleResolver::addRulesFromSheet(CSSStyleSheet* cssSheet, StyleResolver* resolver)
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{
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m_authorStyleSheets.append(cssSheet);
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unsigned index = m_authorStyleSheets.size() - 1;
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StyleSheetContents* sheet = cssSheet->contents();
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AddRuleFlags addRuleFlags = RuleHasNoSpecialState;
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const RuleSet& ruleSet = sheet->ensureRuleSet(addRuleFlags);
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resolver->addMediaQueryResults(ruleSet.viewportDependentMediaQueryResults());
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resolver->processScopedRules(ruleSet, cssSheet, index, treeScope().rootNode());
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m_features.add(ruleSet.features());
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}
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void ScopedStyleResolver::resetAuthorStyle()
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{
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m_authorStyleSheets.clear();
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m_keyframesRuleMap.clear();
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m_features.clear();
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}
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const StyleRuleKeyframes* ScopedStyleResolver::keyframeStylesForAnimation(const StringImpl* animationName)
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{
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if (m_keyframesRuleMap.isEmpty())
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return 0;
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KeyframesRuleMap::iterator it = m_keyframesRuleMap.find(animationName);
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if (it == m_keyframesRuleMap.end())
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return 0;
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return it->value.get();
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}
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void ScopedStyleResolver::addKeyframeStyle(PassRefPtr<StyleRuleKeyframes> rule)
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{
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AtomicString s(rule->name());
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if (rule->isVendorPrefixed()) {
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KeyframesRuleMap::iterator it = m_keyframesRuleMap.find(rule->name().impl());
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if (it == m_keyframesRuleMap.end())
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m_keyframesRuleMap.set(s.impl(), rule);
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else if (it->value->isVendorPrefixed())
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m_keyframesRuleMap.set(s.impl(), rule);
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} else {
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m_keyframesRuleMap.set(s.impl(), rule);
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}
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}
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void ScopedStyleResolver::collectMatchingAuthorRules(ElementRuleCollector& collector, bool includeEmptyRules, bool applyAuthorStyles, CascadeScope cascadeScope, CascadeOrder cascadeOrder)
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{
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unsigned contextFlags = SelectorChecker::DefaultBehavior;
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if (!applyAuthorStyles)
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contextFlags |= SelectorChecker::ScopeContainsLastMatchedElement;
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RuleRange ruleRange = collector.matchedResult().ranges.authorRuleRange();
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for (size_t i = 0; i < m_authorStyleSheets.size(); ++i) {
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MatchRequest matchRequest(&m_authorStyleSheets[i]->contents()->ruleSet(), includeEmptyRules, &m_scope->rootNode(), m_authorStyleSheets[i], applyAuthorStyles, i);
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collector.collectMatchingRules(matchRequest, ruleRange, static_cast<SelectorChecker::ContextFlags>(contextFlags), cascadeScope, cascadeOrder);
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}
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}
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} // namespace blink
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