1/* 2 * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved. 3 * Copyright (C) 2012 Apple Inc. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above 10 * copyright notice, this list of conditions and the following 11 * disclaimer. 12 * 2. Redistributions in binary form must reproduce the above 13 * copyright notice, this list of conditions and the following 14 * disclaimer in the documentation and/or other materials 15 * provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE 21 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 24 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 26 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 27 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31#include "config.h" 32#include "core/css/CSSGroupingRule.h" 33 34#include "bindings/v8/ExceptionState.h" 35#include "core/css/CSSParser.h" 36#include "core/css/CSSRuleList.h" 37#include "core/css/CSSStyleSheet.h" 38#include "core/dom/ExceptionCode.h" 39#include "wtf/text/StringBuilder.h" 40 41namespace WebCore { 42 43CSSGroupingRule::CSSGroupingRule(StyleRuleGroup* groupRule, CSSStyleSheet* parent) 44 : CSSRule(parent) 45 , m_groupRule(groupRule) 46 , m_childRuleCSSOMWrappers(groupRule->childRules().size()) 47{ 48} 49 50CSSGroupingRule::~CSSGroupingRule() 51{ 52 ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size()); 53 for (unsigned i = 0; i < m_childRuleCSSOMWrappers.size(); ++i) { 54 if (m_childRuleCSSOMWrappers[i]) 55 m_childRuleCSSOMWrappers[i]->setParentRule(0); 56 } 57} 58 59unsigned CSSGroupingRule::insertRule(const String& ruleString, unsigned index, ExceptionState& exceptionState) 60{ 61 ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size()); 62 63 if (index > m_groupRule->childRules().size()) { 64 exceptionState.throwDOMException(IndexSizeError, "the index " + String::number(index) + " must be less than or equal to the length of the rule list."); 65 return 0; 66 } 67 68 CSSStyleSheet* styleSheet = parentStyleSheet(); 69 CSSParser parser(parserContext(), UseCounter::getFrom(styleSheet)); 70 RefPtr<StyleRuleBase> newRule = parser.parseRule(styleSheet ? styleSheet->contents() : 0, ruleString); 71 if (!newRule) { 72 exceptionState.throwDOMException(SyntaxError, "the rule '" + ruleString + "' is invalid and cannot be parsed."); 73 return 0; 74 } 75 76 if (newRule->isImportRule()) { 77 // FIXME: an HierarchyRequestError should also be thrown for a @charset or a nested 78 // @media rule. They are currently not getting parsed, resulting in a SyntaxError 79 // to get raised above. 80 exceptionState.throwDOMException(HierarchyRequestError, "'@import' rules cannot be inserted inside a group rule."); 81 return 0; 82 } 83 CSSStyleSheet::RuleMutationScope mutationScope(this); 84 85 m_groupRule->wrapperInsertRule(index, newRule); 86 87 m_childRuleCSSOMWrappers.insert(index, RefPtr<CSSRule>()); 88 return index; 89} 90 91void CSSGroupingRule::deleteRule(unsigned index, ExceptionState& exceptionState) 92{ 93 ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size()); 94 95 if (index >= m_groupRule->childRules().size()) { 96 exceptionState.throwDOMException(IndexSizeError, "the index " + String::number(index) + " is greated than the length of the rule list."); 97 return; 98 } 99 100 CSSStyleSheet::RuleMutationScope mutationScope(this); 101 102 m_groupRule->wrapperRemoveRule(index); 103 104 if (m_childRuleCSSOMWrappers[index]) 105 m_childRuleCSSOMWrappers[index]->setParentRule(0); 106 m_childRuleCSSOMWrappers.remove(index); 107} 108 109void CSSGroupingRule::appendCSSTextForItems(StringBuilder& result) const 110{ 111 unsigned size = length(); 112 for (unsigned i = 0; i < size; ++i) { 113 result.appendLiteral(" "); 114 result.append(item(i)->cssText()); 115 result.append('\n'); 116 } 117} 118 119unsigned CSSGroupingRule::length() const 120{ 121 return m_groupRule->childRules().size(); 122} 123 124CSSRule* CSSGroupingRule::item(unsigned index) const 125{ 126 if (index >= length()) 127 return 0; 128 ASSERT(m_childRuleCSSOMWrappers.size() == m_groupRule->childRules().size()); 129 RefPtr<CSSRule>& rule = m_childRuleCSSOMWrappers[index]; 130 if (!rule) 131 rule = m_groupRule->childRules()[index]->createCSSOMWrapper(const_cast<CSSGroupingRule*>(this)); 132 return rule.get(); 133} 134 135CSSRuleList* CSSGroupingRule::cssRules() const 136{ 137 if (!m_ruleListCSSOMWrapper) 138 m_ruleListCSSOMWrapper = adoptPtr(new LiveCSSRuleList<CSSGroupingRule>(const_cast<CSSGroupingRule*>(this))); 139 return m_ruleListCSSOMWrapper.get(); 140} 141 142void CSSGroupingRule::reattach(StyleRuleBase* rule) 143{ 144 ASSERT(rule); 145 m_groupRule = static_cast<StyleRuleGroup*>(rule); 146 for (unsigned i = 0; i < m_childRuleCSSOMWrappers.size(); ++i) { 147 if (m_childRuleCSSOMWrappers[i]) 148 m_childRuleCSSOMWrappers[i]->reattach(m_groupRule->childRules()[i].get()); 149 } 150} 151 152} // namespace WebCore 153