root/Source/platform/geometry/LayoutBoxExtent.cpp

DEFINITIONS

1. logicalTop
2. logicalBottom
3. logicalLeft
4. logicalRight
5. before
6. after
7. start
8. end
9. setBefore
10. setAfter
11. setStart
12. setEnd
13. mutableLogicalLeft
14. mutableLogicalRight
15. mutableBefore
16. mutableAfter

/*
 * Copyright (c) 2012, Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "platform/geometry/LayoutBoxExtent.h"

#include "wtf/Assertions.h"

namespace WebCore {

LayoutUnit LayoutBoxExtent::logicalTop(WritingMode writingMode) const
{
    return isHorizontalWritingMode(writingMode) ? m_top : m_left;
}

LayoutUnit LayoutBoxExtent::logicalBottom(WritingMode writingMode) const
{
    return isHorizontalWritingMode(writingMode) ? m_bottom : m_right;
}

LayoutUnit LayoutBoxExtent::logicalLeft(WritingMode writingMode) const
{
    return isHorizontalWritingMode(writingMode) ? m_left : m_top;
}

LayoutUnit LayoutBoxExtent::logicalRight(WritingMode writingMode) const
{
    return isHorizontalWritingMode(writingMode) ? m_right : m_bottom;
}

LayoutUnit LayoutBoxExtent::before(WritingMode writingMode) const
{
    switch (writingMode) {
    case TopToBottomWritingMode:
        return m_top;
    case BottomToTopWritingMode:
        return m_bottom;
    case LeftToRightWritingMode:
        return m_left;
    case RightToLeftWritingMode:
        return m_right;
    }
    ASSERT_NOT_REACHED();
    return m_top;
}

LayoutUnit LayoutBoxExtent::after(WritingMode writingMode) const
{
    switch (writingMode) {
    case TopToBottomWritingMode:
        return m_bottom;
    case BottomToTopWritingMode:
        return m_top;
    case LeftToRightWritingMode:
        return m_right;
    case RightToLeftWritingMode:
        return m_left;
    }
    ASSERT_NOT_REACHED();
    return m_bottom;
}

LayoutUnit LayoutBoxExtent::start(WritingMode writingMode, TextDirection direction) const
{
    if (isHorizontalWritingMode(writingMode))
        return isLeftToRightDirection(direction) ? m_left : m_right;
    return isLeftToRightDirection(direction) ? m_top : m_bottom;
}

LayoutUnit LayoutBoxExtent::end(WritingMode writingMode, TextDirection direction) const
{
    if (isHorizontalWritingMode(writingMode))
        return isLeftToRightDirection(direction) ? m_right : m_left;
    return isLeftToRightDirection(direction) ? m_bottom : m_top;
}

void LayoutBoxExtent::setBefore(WritingMode writingMode, LayoutUnit value)
{
    switch (writingMode) {
    case TopToBottomWritingMode:
        m_top = value;
        break;
    case BottomToTopWritingMode:
        m_bottom = value;
        break;
    case LeftToRightWritingMode:
        m_left = value;
        break;
    case RightToLeftWritingMode:
        m_right = value;
        break;
    default:
        ASSERT_NOT_REACHED();
        m_top = value;
    }
}

void LayoutBoxExtent::setAfter(WritingMode writingMode, LayoutUnit value)
{
    switch (writingMode) {
    case TopToBottomWritingMode:
        m_bottom = value;
        break;
    case BottomToTopWritingMode:
        m_top = value;
        break;
    case LeftToRightWritingMode:
        m_right = value;
        break;
    case RightToLeftWritingMode:
        m_left = value;
        break;
    default:
        ASSERT_NOT_REACHED();
        m_bottom = value;
    }
}

void LayoutBoxExtent::setStart(WritingMode writingMode, TextDirection direction, LayoutUnit value)
{
    if (isHorizontalWritingMode(writingMode)) {
        if (isLeftToRightDirection(direction))
            m_left = value;
        else
            m_right = value;
    } else {
        if (isLeftToRightDirection(direction))
            m_top = value;
        else
            m_bottom = value;
    }
}

void LayoutBoxExtent::setEnd(WritingMode writingMode, TextDirection direction, LayoutUnit value)
{
    if (isHorizontalWritingMode(writingMode)) {
        if (isLeftToRightDirection(direction))
            m_right = value;
        else
            m_left = value;
    } else {
        if (isLeftToRightDirection(direction))
            m_bottom = value;
        else
            m_top = value;
    }
}

LayoutUnit& LayoutBoxExtent::mutableLogicalLeft(WritingMode writingMode)
{
    return isHorizontalWritingMode(writingMode) ? m_left : m_top;
}

LayoutUnit& LayoutBoxExtent::mutableLogicalRight(WritingMode writingMode)
{
    return isHorizontalWritingMode(writingMode) ? m_right : m_bottom;
}

LayoutUnit& LayoutBoxExtent::mutableBefore(WritingMode writingMode)
{
    return isHorizontalWritingMode(writingMode) ?
        (isFlippedBlocksWritingMode(writingMode) ? m_bottom : m_top) :
        (isFlippedBlocksWritingMode(writingMode) ? m_right: m_left);
}

LayoutUnit& LayoutBoxExtent::mutableAfter(WritingMode writingMode)
{
    return isHorizontalWritingMode(writingMode) ?
        (isFlippedBlocksWritingMode(writingMode) ? m_top : m_bottom) :
        (isFlippedBlocksWritingMode(writingMode) ? m_left: m_right);
}

} // namespace WebCore