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/*
* Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
* Copyright (C) 2012 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "config.h"
#include "CSSGroupingRule.h"
#include "CSSParser.h"
#include "CSSRuleList.h"
#include "CSSStyleSheet.h"
#include "ExceptionCode.h"
#include "StyleRule.h"
#include <wtf/text/StringBuilder.h>
namespace WebCore {
CSSGroupingRule::CSSGroupingRule(StyleRuleGroup* groupRule, CSSStyleSheet* parent)
: CSSRule(parent)
, m_groupRule(groupRule)
, m_childRuleCSSOMWrappers(groupRule->childRules().size())
{
}
CSSGroupingRule::~CSSGroupingRule()
{
ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size());
for (unsigned i = 0; i < m_childRuleCSSOMWrappers.size(); ++i) {
if (m_childRuleCSSOMWrappers[i])
m_childRuleCSSOMWrappers[i]->setParentRule(0);
}
}
unsigned CSSGroupingRule::insertRule(const String& ruleString, unsigned index, ExceptionCode& ec)
{
ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size());
if (index > m_groupRule->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_groupRule->wrapperInsertRule(index, newRule);
m_childRuleCSSOMWrappers.insert(index, RefPtr<CSSRule>());
return index;
}
void CSSGroupingRule::deleteRule(unsigned index, ExceptionCode& ec)
{
ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size());
if (index >= m_groupRule->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_groupRule->wrapperRemoveRule(index);
if (m_childRuleCSSOMWrappers[index])
m_childRuleCSSOMWrappers[index]->setParentRule(0);
m_childRuleCSSOMWrappers.remove(index);
}
void CSSGroupingRule::appendCssTextForItems(StringBuilder& result) const
{
unsigned size = length();
for (unsigned i = 0; i < size; ++i) {
result.appendLiteral(" ");
result.append(item(i)->cssText());
result.append('\n');
}
}
unsigned CSSGroupingRule::length() const
{
return m_groupRule->childRules().size();
}
CSSRule* CSSGroupingRule::item(unsigned index) const
{
if (index >= length())
return 0;
ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size());
RefPtr<CSSRule>& rule = m_childRuleCSSOMWrappers[index];
if (!rule)
rule = m_groupRule->childRules()[index]->createCSSOMWrapper(const_cast<CSSGroupingRule*>(this));
return rule.get();
}
CSSRuleList* CSSGroupingRule::cssRules() const
{
if (!m_ruleListCSSOMWrapper)
m_ruleListCSSOMWrapper = adoptPtr(new LiveCSSRuleList<CSSGroupingRule>(const_cast<CSSGroupingRule*>(this)));
return m_ruleListCSSOMWrapper.get();
}
void CSSGroupingRule::reattach(StyleRuleBase* rule)
{
ASSERT(rule);
m_groupRule = static_cast<StyleRuleGroup*>(rule);
for (unsigned i = 0; i < m_childRuleCSSOMWrappers.size(); ++i) {
if (m_childRuleCSSOMWrappers[i])
m_childRuleCSSOMWrappers[i]->reattach(m_groupRule->childRules()[i].get());
}
}
} // namespace WebCore
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