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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
* Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
* Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
* Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
* Copyright (C) Research In Motion Limited 2011. All rights reserved.
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "DocumentRuleSets.h"
#include "CSSStyleSheet.h"
#include "ExtensionStyleSheets.h"
#include "MediaQueryEvaluator.h"
#include "StyleResolver.h"
#include "StyleSheetContents.h"
namespace WebCore {
DocumentRuleSets::DocumentRuleSets(StyleResolver& styleResolver)
: m_styleResolver(styleResolver)
{
m_authorStyle = std::make_unique<RuleSet>();
m_authorStyle->disableAutoShrinkToFit();
}
DocumentRuleSets::~DocumentRuleSets()
{
}
RuleSet* DocumentRuleSets::userStyle() const
{
if (m_usesSharedUserStyle)
return m_styleResolver.document().styleScope().resolver().ruleSets().userStyle();
return m_userStyle.get();
}
void DocumentRuleSets::initializeUserStyle()
{
auto& extensionStyleSheets = m_styleResolver.document().extensionStyleSheets();
auto& mediaQueryEvaluator = m_styleResolver.mediaQueryEvaluator();
auto tempUserStyle = std::make_unique<RuleSet>();
if (CSSStyleSheet* pageUserSheet = extensionStyleSheets.pageUserSheet())
tempUserStyle->addRulesFromSheet(pageUserSheet->contents(), mediaQueryEvaluator, &m_styleResolver);
collectRulesFromUserStyleSheets(extensionStyleSheets.injectedUserStyleSheets(), *tempUserStyle, mediaQueryEvaluator, m_styleResolver);
collectRulesFromUserStyleSheets(extensionStyleSheets.documentUserStyleSheets(), *tempUserStyle, mediaQueryEvaluator, m_styleResolver);
if (tempUserStyle->ruleCount() > 0 || tempUserStyle->pageRules().size() > 0)
m_userStyle = WTFMove(tempUserStyle);
}
void DocumentRuleSets::collectRulesFromUserStyleSheets(const Vector<RefPtr<CSSStyleSheet>>& userSheets, RuleSet& userStyle, const MediaQueryEvaluator& medium, StyleResolver& resolver)
{
for (unsigned i = 0; i < userSheets.size(); ++i) {
ASSERT(userSheets[i]->contents().isUserStyleSheet());
userStyle.addRulesFromSheet(userSheets[i]->contents(), medium, &resolver);
}
}
static std::unique_ptr<RuleSet> makeRuleSet(const Vector<RuleFeature>& rules)
{
size_t size = rules.size();
if (!size)
return nullptr;
auto ruleSet = std::make_unique<RuleSet>();
for (size_t i = 0; i < size; ++i)
ruleSet->addRule(rules[i].rule, rules[i].selectorIndex, rules[i].hasDocumentSecurityOrigin ? RuleHasDocumentSecurityOrigin : RuleHasNoSpecialState);
ruleSet->shrinkToFit();
return ruleSet;
}
void DocumentRuleSets::resetAuthorStyle()
{
m_isAuthorStyleDefined = true;
m_authorStyle = std::make_unique<RuleSet>();
m_authorStyle->disableAutoShrinkToFit();
}
void DocumentRuleSets::appendAuthorStyleSheets(const Vector<RefPtr<CSSStyleSheet>>& styleSheets, MediaQueryEvaluator* medium, InspectorCSSOMWrappers& inspectorCSSOMWrappers, StyleResolver* resolver)
{
// This handles sheets added to the end of the stylesheet list only. In other cases the style resolver
// needs to be reconstructed. To handle insertions too the rule order numbers would need to be updated.
for (auto& cssSheet : styleSheets) {
ASSERT(!cssSheet->disabled());
if (cssSheet->mediaQueries() && !medium->evaluate(*cssSheet->mediaQueries(), resolver))
continue;
m_authorStyle->addRulesFromSheet(cssSheet->contents(), *medium, resolver);
inspectorCSSOMWrappers.collectFromStyleSheetIfNeeded(cssSheet.get());
}
m_authorStyle->shrinkToFit();
collectFeatures();
}
void DocumentRuleSets::collectFeatures() const
{
m_features.clear();
// Collect all ids and rules using sibling selectors (:first-child and similar)
// in the current set of stylesheets. Style sharing code uses this information to reject
// sharing candidates.
if (CSSDefaultStyleSheets::defaultStyle)
m_features.add(CSSDefaultStyleSheets::defaultStyle->features());
m_defaultStyleVersionOnFeatureCollection = CSSDefaultStyleSheets::defaultStyleVersion;
if (m_authorStyle)
m_features.add(m_authorStyle->features());
if (auto* userStyle = this->userStyle())
m_features.add(userStyle->features());
m_siblingRuleSet = makeRuleSet(m_features.siblingRules);
m_uncommonAttributeRuleSet = makeRuleSet(m_features.uncommonAttributeRules);
m_ancestorClassRuleSets.clear();
m_ancestorAttributeRuleSetsForHTML.clear();
m_features.shrinkToFit();
}
RuleSet* DocumentRuleSets::ancestorClassRules(const AtomicString& className) const
{
auto addResult = m_ancestorClassRuleSets.add(className, nullptr);
if (addResult.isNewEntry) {
if (auto* rules = m_features.ancestorClassRules.get(className))
addResult.iterator->value = makeRuleSet(*rules);
}
return addResult.iterator->value.get();
}
const DocumentRuleSets::AttributeRules* DocumentRuleSets::ancestorAttributeRulesForHTML(const AtomicString& attributeName) const
{
auto addResult = m_ancestorAttributeRuleSetsForHTML.add(attributeName, nullptr);
auto& value = addResult.iterator->value;
if (addResult.isNewEntry) {
if (auto* rules = m_features.ancestorAttributeRulesForHTML.get(attributeName)) {
value = std::make_unique<AttributeRules>();
value->attributeSelectors.reserveCapacity(rules->selectors.size());
for (auto* selector : rules->selectors.values())
value->attributeSelectors.uncheckedAppend(selector);
value->ruleSet = makeRuleSet(rules->features);
}
}
return value.get();
}
} // namespace WebCore
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