1 /* 2 * Copyright (C) 2008 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef CSSSelectorList_h 27 #define CSSSelectorList_h 28 29 #include "core/css/CSSSelector.h" 30 31 namespace blink { 32 33 class CSSParserSelector; 34 35 class CSSSelectorList { 36 WTF_MAKE_FAST_ALLOCATED; 37 public: 38 CSSSelectorList() : m_selectorArray(0) { } 39 CSSSelectorList(const CSSSelectorList&); 40 41 ~CSSSelectorList(); 42 43 void adopt(CSSSelectorList& list); 44 void adoptSelectorVector(Vector<OwnPtr<CSSParserSelector> >& selectorVector); 45 46 bool isValid() const { return !!m_selectorArray; } 47 const CSSSelector* first() const { return m_selectorArray; } 48 static const CSSSelector* next(const CSSSelector&); 49 bool hasOneSelector() const { return m_selectorArray && !next(*m_selectorArray); } 50 const CSSSelector& selectorAt(size_t index) const { return m_selectorArray[index]; } 51 52 size_t indexOfNextSelectorAfter(size_t index) const 53 { 54 const CSSSelector& current = selectorAt(index); 55 const CSSSelector* next = this->next(current); 56 if (!next) 57 return kNotFound; 58 return next - m_selectorArray; 59 } 60 61 bool selectorsNeedNamespaceResolution(); 62 63 bool hasShadowDistributedAt(size_t index) const; 64 bool selectorCrossesTreeScopes(size_t index) const; 65 66 String selectorsText() const; 67 68 private: 69 unsigned length() const; 70 void deleteSelectors(); 71 72 // Hide. 73 CSSSelectorList& operator=(const CSSSelectorList&); 74 75 // End of a multipart selector is indicated by m_isLastInTagHistory bit in the last item. 76 // End of the array is indicated by m_isLastInSelectorList bit in the last item. 77 CSSSelector* m_selectorArray; 78 }; 79 80 inline const CSSSelector* CSSSelectorList::next(const CSSSelector& current) 81 { 82 // Skip subparts of compound selectors. 83 const CSSSelector* last = ¤t; 84 while (!last->isLastInTagHistory()) 85 last++; 86 return last->isLastInSelectorList() ? 0 : last + 1; 87 } 88 89 } // namespace blink 90 91 #endif // CSSSelectorList_h 92