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_NONCOPYABLE(CSSSelectorList); WTF_MAKE_FAST_ALLOCATED;
37public:
38    CSSSelectorList() : m_selectorArray(0) { }
39    ~CSSSelectorList();
40
41    void adopt(CSSSelectorList& list);
42    void adoptSelectorVector(Vector<OwnPtr<CSSParserSelector> >& selectorVector);
43
44    CSSSelector* first() const { return m_selectorArray ? m_selectorArray : 0; }
45    static CSSSelector* next(CSSSelector*);
46    bool hasOneSelector() const { return m_selectorArray && !next(m_selectorArray); }
47
48    bool selectorsNeedNamespaceResolution();
49    bool hasUnknownPseudoElements() const;
50
51private:
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
59inline 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