third_party/WebKit/Source/platform/geometry/LayoutRectOutsets.cpp

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#include "platform/geometry/LayoutRectOutsets.h"

#include "wtf/Assertions.h"
#include <algorithm>

namespace blink {

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

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

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

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

LayoutRectOutsets LayoutRectOutsets::logicalOutsets(
    WritingMode writingMode) const {
  if (!isHorizontalWritingMode(writingMode))
    return LayoutRectOutsets(m_left, m_bottom, m_right, m_top);
  return *this;
}

LayoutRectOutsets LayoutRectOutsets::logicalOutsetsWithFlippedLines(
    WritingMode writingMode) const {
  LayoutRectOutsets outsets = logicalOutsets(writingMode);
  if (isFlippedLinesWritingMode(writingMode))
    std::swap(outsets.m_top, outsets.m_bottom);
  return outsets;
}

LayoutUnit LayoutRectOutsets::before(WritingMode writingMode) const {
  switch (writingMode) {
    case WritingMode::HorizontalTb:
      return m_top;
    case WritingMode::VerticalLr:
      return m_left;
    case WritingMode::VerticalRl:
      return m_right;
  }
  ASSERT_NOT_REACHED();
  return m_top;
}

LayoutUnit LayoutRectOutsets::after(WritingMode writingMode) const {
  switch (writingMode) {
    case WritingMode::HorizontalTb:
      return m_bottom;
    case WritingMode::VerticalLr:
      return m_right;
    case WritingMode::VerticalRl:
      return m_left;
  }
  ASSERT_NOT_REACHED();
  return m_bottom;
}

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

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

LayoutUnit LayoutRectOutsets::over(WritingMode writingMode) const {
  return isHorizontalWritingMode(writingMode) ? m_top : m_right;
}

LayoutUnit LayoutRectOutsets::under(WritingMode writingMode) const {
  return isHorizontalWritingMode(writingMode) ? m_bottom : m_left;
}

void LayoutRectOutsets::setBefore(WritingMode writingMode, LayoutUnit value) {
  switch (writingMode) {
    case WritingMode::HorizontalTb:
      m_top = value;
      break;
    case WritingMode::VerticalLr:
      m_left = value;
      break;
    case WritingMode::VerticalRl:
      m_right = value;
      break;
    default:
      ASSERT_NOT_REACHED();
      m_top = value;
  }
}

void LayoutRectOutsets::setAfter(WritingMode writingMode, LayoutUnit value) {
  switch (writingMode) {
    case WritingMode::HorizontalTb:
      m_bottom = value;
      break;
    case WritingMode::VerticalLr:
      m_right = value;
      break;
    case WritingMode::VerticalRl:
      m_left = value;
      break;
    default:
      ASSERT_NOT_REACHED();
      m_bottom = value;
  }
}

void LayoutRectOutsets::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 LayoutRectOutsets::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;
  }
}

}  // namespace blink