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/*
* (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());
auto selectorList = p.parseSelector(selectorText);
if (!selectorList)
return;
// NOTE: The selector list has to fit into RuleData. <http://webkit.org/b/118369>
if (selectorList->componentCount() > Style::RuleData::maximumSelectorComponentCount)
return;
CSSStyleSheet::RuleMutationScope mutationScope(this);
m_styleRule->wrapperAdoptSelectorList(WTFMove(*selectorList));
if (hasCachedSelectorText()) {
selectorTextCache().remove(this);
setHasCachedSelectorText(false);
}
}
String CSSStyleRule::cssText() const
{
String declarations = m_styleRule->properties().asText();
if (declarations.isEmpty())
return makeString(selectorText(), " { }");
return makeString(selectorText(), " { ", declarations, " }");
}
void CSSStyleRule::reattach(StyleRuleBase& rule)
{
m_styleRule = downcast<StyleRule>(rule);
if (m_propertiesCSSOMWrapper)
m_propertiesCSSOMWrapper->reattach(m_styleRule->mutableProperties());
}
} // namespace WebCore
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