302 lines
12 KiB
C++
302 lines
12 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
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* Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
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* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
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* Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
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* Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
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* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
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* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
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* Copyright (C) Research In Motion Limited 2011. All rights reserved.
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* Copyright (C) 2013 Google Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include "StyleScopeRuleSets.h"
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#include "CSSStyleSheet.h"
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#include "ExtensionStyleSheets.h"
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#include "Frame.h"
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#include "FrameLoader.h"
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#include "FrameLoaderClient.h"
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#include "MediaQueryEvaluator.h"
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#include "Page.h"
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#include "StyleResolver.h"
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#include "StyleScope.h"
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#include "StyleSheetContents.h"
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namespace WebCore {
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namespace Style {
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ScopeRuleSets::ScopeRuleSets(Resolver& styleResolver)
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: m_styleResolver(styleResolver)
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{
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m_authorStyle = RuleSet::create();
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m_authorStyle->disableAutoShrinkToFit();
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}
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ScopeRuleSets::~ScopeRuleSets()
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{
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RELEASE_ASSERT(!m_isInvalidatingStyleWithRuleSets);
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}
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RuleSet* ScopeRuleSets::userAgentMediaQueryStyle() const
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{
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updateUserAgentMediaQueryStyleIfNeeded();
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return m_userAgentMediaQueryStyle.get();
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}
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void ScopeRuleSets::updateUserAgentMediaQueryStyleIfNeeded() const
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{
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if (!UserAgentStyle::mediaQueryStyleSheet)
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return;
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auto ruleCount = UserAgentStyle::mediaQueryStyleSheet->ruleCount();
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if (m_userAgentMediaQueryStyle && ruleCount == m_userAgentMediaQueryRuleCountOnUpdate)
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return;
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m_userAgentMediaQueryRuleCountOnUpdate = ruleCount;
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// Media queries on user agent sheet need to evaluated in document context. They behave like author sheets in this respect.
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auto& mediaQueryEvaluator = m_styleResolver.mediaQueryEvaluator();
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m_userAgentMediaQueryStyle = RuleSet::create();
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m_userAgentMediaQueryStyle->addRulesFromSheet(*UserAgentStyle::mediaQueryStyleSheet, nullptr, mediaQueryEvaluator, m_styleResolver);
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}
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RuleSet* ScopeRuleSets::userStyle() const
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{
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if (m_usesSharedUserStyle)
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return m_styleResolver.document().styleScope().resolver().ruleSets().userStyle();
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return m_userStyle.get();
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}
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void ScopeRuleSets::initializeUserStyle()
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{
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auto& extensionStyleSheets = m_styleResolver.document().extensionStyleSheets();
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auto& mediaQueryEvaluator = m_styleResolver.mediaQueryEvaluator();
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auto tempUserStyle = RuleSet::create();
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if (CSSStyleSheet* pageUserSheet = extensionStyleSheets.pageUserSheet())
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tempUserStyle->addRulesFromSheet(pageUserSheet->contents(), nullptr, mediaQueryEvaluator, m_styleResolver);
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#if ENABLE(APP_BOUND_DOMAINS)
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auto* page = m_styleResolver.document().page();
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if (!extensionStyleSheets.injectedUserStyleSheets().isEmpty() && page && page->mainFrame().loader().client().shouldEnableInAppBrowserPrivacyProtections())
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m_styleResolver.document().addConsoleMessage(MessageSource::Security, MessageLevel::Warning, "Ignoring user style sheet for non-app bound domain."_s);
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else {
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collectRulesFromUserStyleSheets(extensionStyleSheets.injectedUserStyleSheets(), tempUserStyle.get(), mediaQueryEvaluator);
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if (page && !extensionStyleSheets.injectedUserStyleSheets().isEmpty())
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page->mainFrame().loader().client().notifyPageOfAppBoundBehavior();
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}
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#else
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collectRulesFromUserStyleSheets(extensionStyleSheets.injectedUserStyleSheets(), tempUserStyle.get(), mediaQueryEvaluator);
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#endif
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collectRulesFromUserStyleSheets(extensionStyleSheets.documentUserStyleSheets(), tempUserStyle.get(), mediaQueryEvaluator);
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if (tempUserStyle->ruleCount() > 0 || tempUserStyle->pageRules().size() > 0)
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m_userStyle = WTFMove(tempUserStyle);
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}
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void ScopeRuleSets::collectRulesFromUserStyleSheets(const Vector<RefPtr<CSSStyleSheet>>& userSheets, RuleSet& userStyle, const MediaQueryEvaluator& medium)
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{
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for (unsigned i = 0; i < userSheets.size(); ++i) {
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ASSERT(userSheets[i]->contents().isUserStyleSheet());
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userStyle.addRulesFromSheet(userSheets[i]->contents(), nullptr, medium, m_styleResolver);
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}
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}
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static RefPtr<RuleSet> makeRuleSet(const RuleFeatureVector& rules)
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{
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size_t size = rules.size();
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if (!size)
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return nullptr;
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auto ruleSet = RuleSet::create();
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for (size_t i = 0; i < size; ++i)
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ruleSet->addRule(*rules[i].styleRule, rules[i].selectorIndex, rules[i].selectorListIndex);
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ruleSet->shrinkToFit();
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return ruleSet;
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}
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void ScopeRuleSets::resetAuthorStyle()
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{
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m_isAuthorStyleDefined = true;
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m_authorStyle = RuleSet::create();
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m_authorStyle->disableAutoShrinkToFit();
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}
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void ScopeRuleSets::resetUserAgentMediaQueryStyle()
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{
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m_userAgentMediaQueryStyle = nullptr;
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}
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bool ScopeRuleSets::hasViewportDependentMediaQueries() const
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{
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if (m_authorStyle->hasViewportDependentMediaQueries())
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return true;
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if (m_userStyle && m_userStyle->hasViewportDependentMediaQueries())
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return true;
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if (m_userAgentMediaQueryStyle && m_userAgentMediaQueryStyle->hasViewportDependentMediaQueries())
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return true;
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return false;
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}
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std::optional<DynamicMediaQueryEvaluationChanges> ScopeRuleSets::evaluateDynamicMediaQueryRules(const MediaQueryEvaluator& evaluator)
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{
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std::optional<DynamicMediaQueryEvaluationChanges> evaluationChanges;
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auto evaluate = [&](auto* ruleSet) {
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if (!ruleSet)
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return;
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if (auto changes = ruleSet->evaluateDynamicMediaQueryRules(evaluator)) {
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if (evaluationChanges)
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evaluationChanges->append(WTFMove(*changes));
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else
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evaluationChanges = changes;
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}
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};
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evaluate(&authorStyle());
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evaluate(userStyle());
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evaluate(userAgentMediaQueryStyle());
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return evaluationChanges;
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}
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void ScopeRuleSets::appendAuthorStyleSheets(const Vector<RefPtr<CSSStyleSheet>>& styleSheets, MediaQueryEvaluator* medium, InspectorCSSOMWrappers& inspectorCSSOMWrappers)
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{
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for (auto& cssSheet : styleSheets) {
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ASSERT(!cssSheet->disabled());
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m_authorStyle->addRulesFromSheet(cssSheet->contents(), cssSheet->mediaQueries(), *medium, m_styleResolver);
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inspectorCSSOMWrappers.collectFromStyleSheetIfNeeded(cssSheet.get());
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}
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m_authorStyle->shrinkToFit();
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collectFeatures();
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}
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void ScopeRuleSets::collectFeatures() const
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{
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RELEASE_ASSERT(!m_isInvalidatingStyleWithRuleSets);
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m_features.clear();
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// Collect all ids and rules using sibling selectors (:first-child and similar)
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// in the current set of stylesheets. Style sharing code uses this information to reject
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// sharing candidates.
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if (UserAgentStyle::defaultStyle)
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m_features.add(UserAgentStyle::defaultStyle->features());
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m_defaultStyleVersionOnFeatureCollection = UserAgentStyle::defaultStyleVersion;
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if (auto* userAgentMediaQueryStyle = this->userAgentMediaQueryStyle())
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m_features.add(userAgentMediaQueryStyle->features());
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if (m_authorStyle)
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m_features.add(m_authorStyle->features());
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if (auto* userStyle = this->userStyle())
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m_features.add(userStyle->features());
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m_siblingRuleSet = makeRuleSet(m_features.siblingRules);
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m_uncommonAttributeRuleSet = makeRuleSet(m_features.uncommonAttributeRules);
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m_classInvalidationRuleSets.clear();
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m_attributeInvalidationRuleSets.clear();
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m_pseudoClassInvalidationRuleSets.clear();
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m_cachedHasComplexSelectorsForStyleAttribute = std::nullopt;
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m_features.shrinkToFit();
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}
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template<typename KeyType, typename RuleFeatureVectorType, typename Hash, typename HashTraits>
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static Vector<InvalidationRuleSet>* ensureInvalidationRuleSets(const KeyType& key, HashMap<KeyType, std::unique_ptr<Vector<InvalidationRuleSet>>, Hash, HashTraits>& ruleSetMap, const HashMap<KeyType, std::unique_ptr<RuleFeatureVectorType>, Hash, HashTraits>& ruleFeatures)
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{
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return ruleSetMap.ensure(key, [&] () -> std::unique_ptr<Vector<InvalidationRuleSet>> {
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auto* features = ruleFeatures.get(key);
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if (!features)
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return nullptr;
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std::array<RefPtr<RuleSet>, matchElementCount> matchElementArray;
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std::array<Vector<const CSSSelector*>, matchElementCount> invalidationSelectorArray;
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for (auto& feature : *features) {
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RELEASE_ASSERT(feature.matchElement);
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auto arrayIndex = static_cast<unsigned>(*feature.matchElement);
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RELEASE_ASSERT(arrayIndex < matchElementArray.size());
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auto& ruleSet = matchElementArray[arrayIndex];
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if (!ruleSet)
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ruleSet = RuleSet::create();
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ruleSet->addRule(*feature.styleRule, feature.selectorIndex, feature.selectorListIndex);
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if constexpr (std::is_same<typename RuleFeatureVectorType::ValueType, RuleFeatureWithInvalidationSelector>::value) {
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if (feature.invalidationSelector)
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invalidationSelectorArray[arrayIndex].append(feature.invalidationSelector);
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}
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}
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unsigned ruleSetCount = 0;
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for (const auto& item : matchElementArray) {
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if (item)
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++ruleSetCount;
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}
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auto invalidationRuleSets = makeUnique<Vector<InvalidationRuleSet>>();
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invalidationRuleSets->reserveInitialCapacity(ruleSetCount);
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for (unsigned i = 0; i < matchElementArray.size(); ++i) {
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if (matchElementArray[i]) {
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matchElementArray[i]->shrinkToFit();
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invalidationRuleSets->uncheckedAppend({ static_cast<MatchElement>(i), matchElementArray[i].releaseNonNull(), WTFMove(invalidationSelectorArray[i]) });
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}
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}
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return invalidationRuleSets;
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}).iterator->value.get();
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}
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const Vector<InvalidationRuleSet>* ScopeRuleSets::classInvalidationRuleSets(const AtomString& className) const
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{
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return ensureInvalidationRuleSets(className, m_classInvalidationRuleSets, m_features.classRules);
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}
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const Vector<InvalidationRuleSet>* ScopeRuleSets::attributeInvalidationRuleSets(const AtomString& attributeName) const
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{
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return ensureInvalidationRuleSets(attributeName, m_attributeInvalidationRuleSets, m_features.attributeRules);
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}
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const Vector<InvalidationRuleSet>* ScopeRuleSets::pseudoClassInvalidationRuleSets(CSSSelector::PseudoClassType pseudoClass) const
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{
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return ensureInvalidationRuleSets(pseudoClass, m_pseudoClassInvalidationRuleSets, m_features.pseudoClassRules);
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}
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bool ScopeRuleSets::hasComplexSelectorsForStyleAttribute() const
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{
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auto compute = [&] {
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auto* ruleSets = attributeInvalidationRuleSets(HTMLNames::styleAttr->localName());
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if (!ruleSets)
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return false;
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for (auto& ruleSet : *ruleSets) {
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if (ruleSet.matchElement != MatchElement::Subject)
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return true;
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}
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return false;
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};
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if (!m_cachedHasComplexSelectorsForStyleAttribute)
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m_cachedHasComplexSelectorsForStyleAttribute = compute();
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return *m_cachedHasComplexSelectorsForStyleAttribute;
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}
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} // namespace Style
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} // namespace WebCore
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