1/*
2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
4 * Copyright (C) 2010 Google Inc. All rights reserved.
5 * Copyright (C) 2013 ChangSeok Oh <shivamidow@gmail.com>
6 * Copyright (C) 2013 Adobe Systems Inc. All right reserved.
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB.  If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 *
23 */
24
25#ifndef TrailingObjects_h
26#define TrailingObjects_h
27
28#include <wtf/Vector.h>
29
30namespace WebCore {
31
32class InlineIterator;
33class RenderBoxModelObject;
34class RenderText;
35
36struct BidiRun;
37
38template <class Iterator, class Run> class BidiResolver;
39template <class Iterator> class MidpointState;
40typedef BidiResolver<InlineIterator, BidiRun> InlineBidiResolver;
41typedef MidpointState<InlineIterator> LineMidpointState;
42
43class TrailingObjects {
44public:
45    TrailingObjects()
46        : m_whitespace(0)
47    { }
48
49    void setTrailingWhitespace(RenderText* whitespace)
50    {
51        ASSERT(whitespace);
52        m_whitespace = whitespace;
53    }
54
55    void clear()
56    {
57        m_whitespace = 0;
58        m_boxes.shrink(0); // Use shrink(0) instead of clear() to retain our capacity.
59    }
60
61    void appendBoxIfNeeded(RenderBoxModelObject* box)
62    {
63        if (m_whitespace)
64            m_boxes.append(box);
65    }
66
67    enum CollapseFirstSpaceOrNot { DoNotCollapseFirstSpace, CollapseFirstSpace };
68
69    void updateMidpointsForTrailingBoxes(LineMidpointState&, const InlineIterator& lBreak, CollapseFirstSpaceOrNot);
70
71private:
72    RenderText* m_whitespace;
73    Vector<RenderBoxModelObject*, 4> m_boxes;
74};
75
76}
77
78#endif // TrailingObjects_h
79