1/*
2 * Copyright (c) 2012, Google 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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "platform/LengthBox.h"
33
34namespace blink {
35
36const Length& LengthBox::logicalLeft(WritingMode writingMode) const
37{
38    return isHorizontalWritingMode(writingMode) ? m_left : m_top;
39}
40
41const Length& LengthBox::logicalRight(WritingMode writingMode) const
42{
43    return isHorizontalWritingMode(writingMode) ? m_right : m_bottom;
44}
45
46const Length& LengthBox::before(WritingMode writingMode) const
47{
48    switch (writingMode) {
49    case TopToBottomWritingMode:
50        return m_top;
51    case BottomToTopWritingMode:
52        return m_bottom;
53    case LeftToRightWritingMode:
54        return m_left;
55    case RightToLeftWritingMode:
56        return m_right;
57    }
58    ASSERT_NOT_REACHED();
59    return m_top;
60}
61
62const Length& LengthBox::after(WritingMode writingMode) const
63{
64    switch (writingMode) {
65    case TopToBottomWritingMode:
66        return m_bottom;
67    case BottomToTopWritingMode:
68        return m_top;
69    case LeftToRightWritingMode:
70        return m_right;
71    case RightToLeftWritingMode:
72        return m_left;
73    }
74    ASSERT_NOT_REACHED();
75    return m_bottom;
76}
77
78const Length& LengthBox::start(WritingMode writingMode, TextDirection direction) const
79{
80    if (isHorizontalWritingMode(writingMode))
81        return isLeftToRightDirection(direction) ? m_left : m_right;
82    return isLeftToRightDirection(direction) ? m_top : m_bottom;
83}
84
85const Length& LengthBox::end(WritingMode writingMode, TextDirection direction) const
86{
87    if (isHorizontalWritingMode(writingMode))
88        return isLeftToRightDirection(direction) ? m_right : m_left;
89    return isLeftToRightDirection(direction) ? m_bottom : m_top;
90}
91
92} // namespace blink
93