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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, 2012 Apple Computer, Inc.
* Copyright (C) 2006 Samuel Weinig (sam@webkit.org)
*
* 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 "CSSMediaRule.h"
#include "CSSParser.h"
#include "CSSRuleList.h"
#include "CSSStyleSheet.h"
#include "ExceptionCode.h"
#include "StyleRule.h"
#include "WebCoreMemoryInstrumentation.h"
#include <wtf/MemoryInstrumentationVector.h>
#include <wtf/text/StringBuilder.h>
namespace WebCore {
CSSMediaRule::CSSMediaRule(StyleRuleMedia* mediaRule, CSSStyleSheet* parent)
: CSSRule(parent)
, m_mediaRule(mediaRule)
, m_childRuleCSSOMWrappers(mediaRule->childRules().size())
{
}
CSSMediaRule::~CSSMediaRule()
{
ASSERT(m_childRuleCSSOMWrappers.size() == m_mediaRule->childRules().size());
for (unsigned i = 0; i < m_childRuleCSSOMWrappers.size(); ++i) {
if (m_childRuleCSSOMWrappers[i])
m_childRuleCSSOMWrappers[i]->setParentRule(0);
}
if (m_mediaCSSOMWrapper)
m_mediaCSSOMWrapper->clearParentRule();
}
unsigned CSSMediaRule::insertRule(const String& ruleString, unsigned index, ExceptionCode& ec)
{
ASSERT(m_childRuleCSSOMWrappers.size() == m_mediaRule->childRules().size());
if (index > m_mediaRule->childRules().size()) {
// INDEX_SIZE_ERR: Raised if the specified index is not a valid insertion point.
ec = INDEX_SIZE_ERR;
return 0;
}
CSSParser parser(parserContext());
CSSStyleSheet* styleSheet = parentStyleSheet();
RefPtr<StyleRuleBase> newRule = parser.parseRule(styleSheet ? styleSheet->contents() : 0, ruleString);
if (!newRule) {
// SYNTAX_ERR: Raised if the specified rule has a syntax error and is unparsable.
ec = SYNTAX_ERR;
return 0;
}
if (newRule->isImportRule()) {
// FIXME: an HIERARCHY_REQUEST_ERR should also be thrown for a @charset or a nested
// @media rule. They are currently not getting parsed, resulting in a SYNTAX_ERR
// to get raised above.
// HIERARCHY_REQUEST_ERR: Raised if the rule cannot be inserted at the specified
// index, e.g., if an @import rule is inserted after a standard rule set or other
// at-rule.
ec = HIERARCHY_REQUEST_ERR;
return 0;
}
CSSStyleSheet::RuleMutationScope mutationScope(this);
m_mediaRule->wrapperInsertRule(index, newRule);
m_childRuleCSSOMWrappers.insert(index, RefPtr<CSSRule>());
return index;
}
void CSSMediaRule::deleteRule(unsigned index, ExceptionCode& ec)
{
ASSERT(m_childRuleCSSOMWrappers.size() == m_mediaRule->childRules().size());
if (index >= m_mediaRule->childRules().size()) {
// INDEX_SIZE_ERR: Raised if the specified index does not correspond to a
// rule in the media rule list.
ec = INDEX_SIZE_ERR;
return;
}
CSSStyleSheet::RuleMutationScope mutationScope(this);
m_mediaRule->wrapperRemoveRule(index);
if (m_childRuleCSSOMWrappers[index])
m_childRuleCSSOMWrappers[index]->setParentRule(0);
m_childRuleCSSOMWrappers.remove(index);
}
String CSSMediaRule::cssText() const
{
StringBuilder result;
result.append("@media ");
if (m_mediaRule->mediaQueries()) {
result.append(m_mediaRule->mediaQueries()->mediaText());
result.append(' ');
}
result.append("{ \n");
unsigned size = length();
for (unsigned i = 0; i < size; ++i) {
result.append(" ");
result.append(item(i)->cssText());
result.append('\n');
}
result.append('}');
return result.toString();
}
MediaList* CSSMediaRule::media() const
{
if (!m_mediaRule->mediaQueries())
return 0;
if (!m_mediaCSSOMWrapper)
m_mediaCSSOMWrapper = MediaList::create(m_mediaRule->mediaQueries(), const_cast<CSSMediaRule*>(this));
return m_mediaCSSOMWrapper.get();
}
unsigned CSSMediaRule::length() const
{
return m_mediaRule->childRules().size();
}
CSSRule* CSSMediaRule::item(unsigned index) const
{
if (index >= length())
return 0;
ASSERT(m_childRuleCSSOMWrappers.size() == m_mediaRule->childRules().size());
RefPtr<CSSRule>& rule = m_childRuleCSSOMWrappers[index];
if (!rule)
rule = m_mediaRule->childRules()[index]->createCSSOMWrapper(const_cast<CSSMediaRule*>(this));
return rule.get();
}
CSSRuleList* CSSMediaRule::cssRules() const
{
if (!m_ruleListCSSOMWrapper)
m_ruleListCSSOMWrapper = adoptPtr(new LiveCSSRuleList<CSSMediaRule>(const_cast<CSSMediaRule*>(this)));
return m_ruleListCSSOMWrapper.get();
}
void CSSMediaRule::reattach(StyleRuleBase* rule)
{
ASSERT(rule);
ASSERT(rule->isMediaRule());
m_mediaRule = static_cast<StyleRuleMedia*>(rule);
if (m_mediaCSSOMWrapper && m_mediaRule->mediaQueries())
m_mediaCSSOMWrapper->reattach(m_mediaRule->mediaQueries());
for (unsigned i = 0; i < m_childRuleCSSOMWrappers.size(); ++i) {
if (m_childRuleCSSOMWrappers[i])
m_childRuleCSSOMWrappers[i]->reattach(m_mediaRule->childRules()[i].get());
}
}
void CSSMediaRule::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
{
MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::CSS);
CSSRule::reportMemoryUsage(memoryObjectInfo);
info.addMember(m_mediaCSSOMWrapper);
info.addMember(m_childRuleCSSOMWrappers);
info.addMember(m_ruleListCSSOMWrapper);
}
} // namespace WebCore
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