128 lines
3.8 KiB
C++
128 lines
3.8 KiB
C++
/*
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* (C) 1999-2003 Lars Knoll (knoll@kde.org)
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* (C) 2002-2003 Dirk Mueller (mueller@kde.org)
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* Copyright (C) 2002, 2005, 2006, 2008, 2012, 2013 Apple 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 "CSSStyleRule.h"
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#include "CSSParser.h"
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#include "CSSStyleSheet.h"
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#include "PropertySetCSSStyleDeclaration.h"
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#include "RuleSet.h"
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#include "StyleProperties.h"
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#include "StyleRule.h"
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#include <wtf/NeverDestroyed.h>
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#include <wtf/text/StringBuilder.h>
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namespace WebCore {
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typedef HashMap<const CSSStyleRule*, String> SelectorTextCache;
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static SelectorTextCache& selectorTextCache()
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{
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static NeverDestroyed<SelectorTextCache> cache;
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return cache;
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}
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CSSStyleRule::CSSStyleRule(StyleRule& styleRule, CSSStyleSheet* parent)
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: CSSRule(parent)
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, m_styleRule(styleRule)
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{
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}
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CSSStyleRule::~CSSStyleRule()
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{
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if (m_propertiesCSSOMWrapper)
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m_propertiesCSSOMWrapper->clearParentRule();
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if (hasCachedSelectorText()) {
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selectorTextCache().remove(this);
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setHasCachedSelectorText(false);
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}
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}
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CSSStyleDeclaration& CSSStyleRule::style()
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{
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if (!m_propertiesCSSOMWrapper)
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m_propertiesCSSOMWrapper = StyleRuleCSSStyleDeclaration::create(m_styleRule->mutableProperties(), *this);
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return *m_propertiesCSSOMWrapper;
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}
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String CSSStyleRule::generateSelectorText() const
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{
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return m_styleRule->selectorList().selectorsText();
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}
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String CSSStyleRule::selectorText() const
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{
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if (hasCachedSelectorText()) {
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ASSERT(selectorTextCache().contains(this));
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return selectorTextCache().get(this);
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}
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ASSERT(!selectorTextCache().contains(this));
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String text = generateSelectorText();
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selectorTextCache().set(this, text);
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setHasCachedSelectorText(true);
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return text;
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}
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void CSSStyleRule::setSelectorText(const String& selectorText)
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{
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// FIXME: getMatchedCSSRules can return CSSStyleRules that are missing parent stylesheet pointer while
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// referencing StyleRules that are part of stylesheet. Disallow mutations in this case.
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if (!parentStyleSheet())
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return;
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CSSParser p(parserContext());
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auto selectorList = p.parseSelector(selectorText);
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if (!selectorList)
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return;
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// NOTE: The selector list has to fit into RuleData. <http://webkit.org/b/118369>
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if (selectorList->componentCount() > Style::RuleData::maximumSelectorComponentCount)
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return;
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CSSStyleSheet::RuleMutationScope mutationScope(this);
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m_styleRule->wrapperAdoptSelectorList(WTFMove(*selectorList));
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if (hasCachedSelectorText()) {
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selectorTextCache().remove(this);
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setHasCachedSelectorText(false);
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}
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}
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String CSSStyleRule::cssText() const
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{
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String declarations = m_styleRule->properties().asText();
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if (declarations.isEmpty())
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return makeString(selectorText(), " { }");
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return makeString(selectorText(), " { ", declarations, " }");
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}
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void CSSStyleRule::reattach(StyleRuleBase& rule)
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{
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m_styleRule = downcast<StyleRule>(rule);
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if (m_propertiesCSSOMWrapper)
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m_propertiesCSSOMWrapper->reattach(m_styleRule->mutableProperties());
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}
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} // namespace WebCore
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