1/*
2 * Copyright (C) 2013 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. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef SimpleLineLayout_h
27#define SimpleLineLayout_h
28
29#include <wtf/Vector.h>
30#include <wtf/text/WTFString.h>
31
32#if COMPILER(MSVC)
33#pragma warning(push)
34#pragma warning(disable: 4200) // Disable "zero-sized array in struct/union" warning
35#endif
36
37namespace WebCore {
38
39class RenderBlockFlow;
40
41namespace SimpleLineLayout {
42
43bool canUseFor(const RenderBlockFlow&);
44
45struct Run {
46    Run() { }
47    Run(unsigned start, float left)
48        : start(start)
49        , end(start)
50        , isEndOfLine(false)
51        , left(left)
52        , right(left)
53    { }
54
55    unsigned start;
56    unsigned end : 31;
57    unsigned isEndOfLine : 1;
58    float left;
59    float right;
60};
61
62class Layout {
63    WTF_MAKE_FAST_ALLOCATED;
64public:
65    typedef Vector<Run, 10> RunVector;
66    static std::unique_ptr<Layout> create(const RunVector&, unsigned lineCount);
67
68    unsigned lineCount() const { return m_lineCount; }
69
70    unsigned runCount() const { return m_runCount; }
71    const Run& runAt(unsigned i) const { return m_runs[i]; }
72
73private:
74    Layout(const RunVector&, unsigned lineCount);
75
76    unsigned m_lineCount;
77    unsigned m_runCount;
78    Run m_runs[0];
79};
80
81std::unique_ptr<Layout> create(RenderBlockFlow&);
82
83}
84}
85
86#if COMPILER(MSVC)
87#pragma warning(pop)
88#endif
89
90#endif
91