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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 "CSSSelector.h"
30 
31 namespace WebCore {
32 
33 class CSSParserSelector;
34 
35 class CSSSelectorList {
36     WTF_MAKE_NONCOPYABLE(CSSSelectorList); WTF_MAKE_FAST_ALLOCATED;
37 public:
CSSSelectorList()38     CSSSelectorList() : m_selectorArray(0) { }
39     ~CSSSelectorList();
40 
41     void adopt(CSSSelectorList& list);
42     void adoptSelectorVector(Vector<OwnPtr<CSSParserSelector> >& selectorVector);
43 
first()44     CSSSelector* first() const { return m_selectorArray ? m_selectorArray : 0; }
45     static CSSSelector* next(CSSSelector*);
hasOneSelector()46     bool hasOneSelector() const { return m_selectorArray && !next(m_selectorArray); }
47 
48     bool selectorsNeedNamespaceResolution();
49     bool hasUnknownPseudoElements() const;
50 
51 private:
52     void deleteSelectors();
53 
54     // End of a multipart selector is indicated by m_isLastInTagHistory bit in the last item.
55     // End of the array is indicated by m_isLastInSelectorList bit in the last item.
56     CSSSelector* m_selectorArray;
57 };
58 
next(CSSSelector * current)59 inline CSSSelector* CSSSelectorList::next(CSSSelector* current)
60 {
61     // Skip subparts of compound selectors.
62     while (!current->isLastInTagHistory())
63         current++;
64     return current->isLastInSelectorList() ? 0 : current + 1;
65 }
66 
67 } // namespace WebCore
68 
69 #endif // CSSSelectorList_h
70