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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 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 "core/css/CSSStyleRule.h"
#include "core/css/CSSSelector.h"
#include "core/css/CSSStyleSheet.h"
#include "core/css/PropertySetCSSStyleDeclaration.h"
#include "core/css/StylePropertySet.h"
#include "core/css/StyleRule.h"
#include "core/css/parser/CSSParser.h"
#include "wtf/text/StringBuilder.h"
namespace blink {
using SelectorTextCache =
PersistentHeapHashMap<WeakMember<const CSSStyleRule>, String>;
static SelectorTextCache& selectorTextCache() {
DEFINE_STATIC_LOCAL(SelectorTextCache, cache, ());
return cache;
}
CSSStyleRule::CSSStyleRule(StyleRule* styleRule, CSSStyleSheet* parent)
: CSSRule(parent), m_styleRule(styleRule) {}
CSSStyleRule::~CSSStyleRule() {}
CSSStyleDeclaration* CSSStyleRule::style() const {
if (!m_propertiesCSSOMWrapper) {
m_propertiesCSSOMWrapper = StyleRuleCSSStyleDeclaration::create(
m_styleRule->mutableProperties(), const_cast<CSSStyleRule*>(this));
}
return m_propertiesCSSOMWrapper.get();
}
String CSSStyleRule::generateSelectorText() const {
StringBuilder builder;
for (const CSSSelector* selector = m_styleRule->selectorList().first();
selector; selector = CSSSelectorList::next(*selector)) {
if (selector != m_styleRule->selectorList().first())
builder.append(", ");
builder.append(selector->selectorText());
}
return builder.toString();
}
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) {
const CSSParserContext* context =
CSSParserContext::create(parserContext(), nullptr);
CSSSelectorList selectorList = CSSParser::parseSelector(
context, parentStyleSheet() ? parentStyleSheet()->contents() : nullptr,
selectorText);
if (!selectorList.isValid())
return;
CSSStyleSheet::RuleMutationScope mutationScope(this);
m_styleRule->wrapperAdoptSelectorList(std::move(selectorList));
if (hasCachedSelectorText()) {
selectorTextCache().remove(this);
setHasCachedSelectorText(false);
}
}
String CSSStyleRule::cssText() const {
StringBuilder result;
result.append(selectorText());
result.append(" { ");
String decls = m_styleRule->properties().asText();
result.append(decls);
if (!decls.isEmpty())
result.append(' ');
result.append('}');
return result.toString();
}
void CSSStyleRule::reattach(StyleRuleBase* rule) {
ASSERT(rule);
m_styleRule = toStyleRule(rule);
if (m_propertiesCSSOMWrapper)
m_propertiesCSSOMWrapper->reattach(m_styleRule->mutableProperties());
}
DEFINE_TRACE(CSSStyleRule) {
visitor->trace(m_styleRule);
visitor->trace(m_propertiesCSSOMWrapper);
CSSRule::trace(visitor);
}
DEFINE_TRACE_WRAPPERS(CSSStyleRule) {
visitor->traceWrappers(parentRule());
visitor->traceWrappers(parentStyleSheet());
CSSRule::traceWrappers(visitor);
}
} // namespace blink
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