1/*
2 * Copyright (C) 2011 Google Inc. All rights reserved.
3 * Copyright (C) 2013 Igalia S.L. 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 are
7 * met:
8 *
9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 * * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#pragma once
33
34#include <wtf/StdSet.h>
35
36namespace WebCore {
37
38class RenderBox;
39class RenderObject;
40
41class OrderIterator {
42public:
43 friend class OrderIteratorPopulator;
44
45 explicit OrderIterator(RenderBox&);
46
47 RenderBox* currentChild() const { return m_currentChild; }
48 RenderBox* first();
49 RenderBox* next();
50
51 bool shouldSkipChild(const RenderObject&) const;
52
53private:
54 void reset();
55
56 RenderBox& m_containerBox;
57 RenderBox* m_currentChild;
58
59 using OrderValues = StdSet<int>;
60 OrderValues m_orderValues;
61 OrderValues::const_iterator m_orderValuesIterator;
62 bool m_isReset { false };
63};
64
65class OrderIteratorPopulator {
66public:
67 explicit OrderIteratorPopulator(OrderIterator& iterator)
68 : m_iterator(iterator)
69 {
70 m_iterator.m_orderValues.clear();
71 }
72 ~OrderIteratorPopulator();
73
74 bool collectChild(const RenderBox&);
75
76private:
77 OrderIterator& m_iterator;
78};
79
80} // namespace WebCore
81