blob: bb8d21c39d5791bd4c018f3ce0e986e1455d08f2 [file] [log] [blame]
/*
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* (C) 2002-2003 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2002, 2005, 2006, 2008, 2012, 2013 Apple 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 "CSSStyleRule.h"
#include "CSSParser.h"
#include "CSSStyleSheet.h"
#include "PropertySetCSSStyleDeclaration.h"
#include "RuleSet.h"
#include "StyleProperties.h"
#include "StyleRule.h"
#include <wtf/NeverDestroyed.h>
#include <wtf/text/StringBuilder.h>
namespace WebCore {
typedef HashMap<const CSSStyleRule*, String> SelectorTextCache;
static SelectorTextCache& selectorTextCache()
{
static NeverDestroyed<SelectorTextCache> cache;
return cache;
}
CSSStyleRule::CSSStyleRule(StyleRule& styleRule, CSSStyleSheet* parent)
: CSSRule(parent)
, m_styleRule(styleRule)
{
}
CSSStyleRule::~CSSStyleRule()
{
if (m_propertiesCSSOMWrapper)
m_propertiesCSSOMWrapper->clearParentRule();
if (hasCachedSelectorText()) {
selectorTextCache().remove(this);
setHasCachedSelectorText(false);
}
}
CSSStyleDeclaration& CSSStyleRule::style()
{
if (!m_propertiesCSSOMWrapper)
m_propertiesCSSOMWrapper = StyleRuleCSSStyleDeclaration::create(m_styleRule->mutableProperties(), *this);
return *m_propertiesCSSOMWrapper;
}
String CSSStyleRule::generateSelectorText() const
{
return m_styleRule->selectorList().selectorsText();
}
String CSSStyleRule::selectorText() const
{
if (hasCachedSelectorText()) {
ASSERT(selectorTextCache().contains(this));
return selectorTextCache().get(this);
}
ASSERT(!selectorTextCache().contains(this));
String text = generateSelectorText();
selectorTextCache().set(this, text);
setHasCachedSelectorText(true);
return text;
}
void CSSStyleRule::setSelectorText(const String& selectorText)
{
// FIXME: getMatchedCSSRules can return CSSStyleRules that are missing parent stylesheet pointer while
// referencing StyleRules that are part of stylesheet. Disallow mutations in this case.
if (!parentStyleSheet())
return;
CSSParser p(parserContext());
CSSSelectorList selectorList;
p.parseSelector(selectorText, selectorList);
if (!selectorList.isValid())
return;
// NOTE: The selector list has to fit into RuleData. <http://webkit.org/b/118369>
if (selectorList.componentCount() > RuleData::maximumSelectorComponentCount)
return;
CSSStyleSheet::RuleMutationScope mutationScope(this);
m_styleRule->wrapperAdoptSelectorList(selectorList);
if (hasCachedSelectorText()) {
selectorTextCache().remove(this);
setHasCachedSelectorText(false);
}
}
String CSSStyleRule::cssText() const
{
StringBuilder result;
result.append(selectorText());
result.appendLiteral(" { ");
String decls = m_styleRule->properties().asText();
result.append(decls);
if (!decls.isEmpty())
result.append(' ');
result.append('}');
return result.toString();
}
void CSSStyleRule::reattach(StyleRuleBase& rule)
{
m_styleRule = downcast<StyleRule>(rule);
if (m_propertiesCSSOMWrapper)
m_propertiesCSSOMWrapper->reattach(m_styleRule->mutableProperties());
}
} // namespace WebCore