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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 "core/css/CSSGroupingRule.h"
#include "bindings/core/v8/ExceptionState.h"
#include "core/css/CSSRuleList.h"
#include "core/css/CSSStyleSheet.h"
#include "core/css/parser/CSSParser.h"
#include "core/dom/ExceptionCode.h"
#include "core/frame/UseCounter.h"
#include "wtf/text/StringBuilder.h"
namespace blink {
CSSGroupingRule::CSSGroupingRule(StyleRuleGroup* groupRule, CSSStyleSheet* parent)
: CSSRule(parent)
, m_groupRule(groupRule)
, m_childRuleCSSOMWrappers(groupRule->childRules().size())
{
}
CSSGroupingRule::~CSSGroupingRule()
{
#if !ENABLE(OILPAN)
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);
}
#endif
}
unsigned CSSGroupingRule::insertRule(const String& ruleString, unsigned index, ExceptionState& exceptionState)
{
ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size());
if (index > m_groupRule->childRules().size()) {
exceptionState.throwDOMException(IndexSizeError, "the index " + String::number(index) + " must be less than or equal to the length of the rule list.");
return 0;
}
CSSStyleSheet* styleSheet = parentStyleSheet();
CSSParserContext context(parserContext(), UseCounter::getFrom(styleSheet));
RefPtrWillBeRawPtr<StyleRuleBase> newRule = CSSParser::parseRule(context, styleSheet ? styleSheet->contents() : 0, ruleString);
if (!newRule) {
exceptionState.throwDOMException(SyntaxError, "the rule '" + ruleString + "' is invalid and cannot be parsed.");
return 0;
}
if (newRule->isImportRule()) {
// FIXME: an HierarchyRequestError should also be thrown for a nested @media rule. They are
// currently not getting parsed, resulting in a SyntaxError to get raised above.
exceptionState.throwDOMException(HierarchyRequestError, "'@import' rules cannot be inserted inside a group rule.");
return 0;
}
CSSStyleSheet::RuleMutationScope mutationScope(this);
m_groupRule->wrapperInsertRule(index, newRule);
m_childRuleCSSOMWrappers.insert(index, RefPtrWillBeMember<CSSRule>(nullptr));
return index;
}
void CSSGroupingRule::deleteRule(unsigned index, ExceptionState& exceptionState)
{
ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size());
if (index >= m_groupRule->childRules().size()) {
exceptionState.throwDOMException(IndexSizeError, "the index " + String::number(index) + " is greated than the length of the rule list.");
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());
RefPtrWillBeMember<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 = LiveCSSRuleList<CSSGroupingRule>::create(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());
}
}
void CSSGroupingRule::trace(Visitor* visitor)
{
CSSRule::trace(visitor);
#if ENABLE(OILPAN)
visitor->trace(m_childRuleCSSOMWrappers);
#endif
visitor->trace(m_groupRule);
visitor->trace(m_ruleListCSSOMWrapper);
}
} // namespace blink
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