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 LineBreaker_h
26#define LineBreaker_h
27
28#include "InlineIterator.h"
29#include "LineInfo.h"
30#include "LineInlineHeaders.h"
31#include "TextBreakIterator.h"
32#include <wtf/Vector.h>
33
34namespace WebCore {
35
36class RenderText;
37
38struct RenderTextInfo {
39    // Destruction of m_layout requires TextLayout to be a complete type, so the constructor and destructor are made non-inline to avoid compilation errors.
40    RenderTextInfo();
41    ~RenderTextInfo();
42
43    RenderText* m_text;
44    OwnPtr<TextLayout> m_layout;
45    LazyLineBreakIterator m_lineBreakIterator;
46    const Font* m_font;
47};
48
49class LineBreaker {
50public:
51    friend class BreakingContext;
52    LineBreaker(RenderBlockFlow& block)
53        : m_block(block)
54    {
55        reset();
56    }
57
58    InlineIterator nextLineBreak(InlineBidiResolver&, LineInfo&, RenderTextInfo&, FloatingObject* lastFloatFromPreviousLine, unsigned consecutiveHyphenatedLines, WordMeasurements&);
59
60    bool lineWasHyphenated() { return m_hyphenated; }
61    const Vector<RenderBox*>& positionedObjects() { return m_positionedObjects; }
62    EClear clear() { return m_clear; }
63
64private:
65    void reset();
66
67    InlineIterator nextSegmentBreak(InlineBidiResolver&, LineInfo&, RenderTextInfo&, FloatingObject* lastFloatFromPreviousLine, unsigned consecutiveHyphenatedLines, WordMeasurements&);
68    void skipTrailingWhitespace(InlineIterator&, const LineInfo&);
69    void skipLeadingWhitespace(InlineBidiResolver&, LineInfo&, FloatingObject* lastFloatFromPreviousLine, LineWidth&);
70
71    FloatingObject* insertFloatingObject(RenderBox& floatBox) { return m_block.insertFloatingObject(floatBox); }
72    bool positionNewFloatOnLine(FloatingObject* newFloat, FloatingObject* lastFloatFromPreviousLine, LineInfo& lineInfo, LineWidth& width)
73    {
74        return m_block.positionNewFloatOnLine(newFloat, lastFloatFromPreviousLine, lineInfo, width);
75    }
76
77    RenderBlockFlow& m_block;
78    bool m_hyphenated;
79    EClear m_clear;
80    Vector<RenderBox*> m_positionedObjects;
81};
82
83}
84
85#endif // LineBreaker_h
86