Source/platform/geometry/LayoutBoxExtent.cpp

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

#include "wtf/Assertions.h"

namespace blink {

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 blink