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
31namespace WebCore {
32
33class CSSParserSelector;
34
35class CSSSelectorList {
36    WTF_MAKE_FAST_ALLOCATED;
37public:
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    void adoptSelectorArray(CSSSelector* selectors) { ASSERT(!m_selectorArray); m_selectorArray = selectors; }
46
47    bool isValid() const { return !!m_selectorArray; }
48    const CSSSelector* first() const { return m_selectorArray; }
49    static const CSSSelector* next(const CSSSelector*);
50    bool hasOneSelector() const { return m_selectorArray && !next(m_selectorArray); }
51    const CSSSelector* selectorAt(size_t index) const { return &m_selectorArray[index]; }
52
53    size_t indexOfNextSelectorAfter(size_t index) const
54    {
55        const CSSSelector* current = selectorAt(index);
56        current = next(current);
57        if (!current)
58            return notFound;
59        return current - m_selectorArray;
60    }
61
62    bool selectorsNeedNamespaceResolution();
63    bool hasInvalidSelector() const;
64
65    String selectorsText() const;
66
67    unsigned componentCount() const;
68
69private:
70    void deleteSelectors();
71
72    // End of a multipart selector is indicated by m_isLastInTagHistory bit in the last item.
73    // End of the array is indicated by m_isLastInSelectorList bit in the last item.
74    CSSSelector* m_selectorArray;
75};
76
77inline const CSSSelector* CSSSelectorList::next(const CSSSelector* current)
78{
79    // Skip subparts of compound selectors.
80    while (!current->isLastInTagHistory())
81        current++;
82    return current->isLastInSelectorList() ? 0 : current + 1;
83}
84
85} // namespace WebCore
86
87#endif // CSSSelectorList_h
88