third_party/WebKit/Source/platform/LengthBox.cpp

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#include "platform/LengthBox.h"

namespace blink {

const Length& LengthBox::LogicalLeft(WritingMode writing_mode,
                                     const Length& left,
                                     const Length& top) {
  return IsHorizontalWritingMode(writing_mode) ? left : top;
}

const Length& LengthBox::LogicalRight(WritingMode writing_mode,
                                      const Length& right,
                                      const Length& bottom) {
  return IsHorizontalWritingMode(writing_mode) ? right : bottom;
}

const Length& LengthBox::Before(WritingMode writing_mode,
                                const Length& top,
                                const Length& left,
                                const Length& right) {
  switch (writing_mode) {
    case WritingMode::kHorizontalTb:
      return top;
    case WritingMode::kVerticalLr:
      return left;
    case WritingMode::kVerticalRl:
      return right;
  }
  NOTREACHED();
  return top;
}

const Length& LengthBox::After(WritingMode writing_mode,
                               const Length& bottom,
                               const Length& left,
                               const Length& right) {
  switch (writing_mode) {
    case WritingMode::kHorizontalTb:
      return bottom;
    case WritingMode::kVerticalLr:
      return right;
    case WritingMode::kVerticalRl:
      return left;
  }
  NOTREACHED();
  return bottom;
}

const Length& LengthBox::Start(WritingMode writing_mode,
                               TextDirection direction,
                               const Length& top,
                               const Length& left,
                               const Length& right,
                               const Length& bottom) {
  if (IsHorizontalWritingMode(writing_mode))
    return IsLeftToRightDirection(direction) ? left : right;
  return IsLeftToRightDirection(direction) ? top : bottom;
}

const Length& LengthBox::End(WritingMode writing_mode,
                             TextDirection direction,
                             const Length& top,
                             const Length& left,
                             const Length& right,
                             const Length& bottom) {
  if (IsHorizontalWritingMode(writing_mode))
    return IsLeftToRightDirection(direction) ? right : left;
  return IsLeftToRightDirection(direction) ? bottom : top;
}

const Length& LengthBox::Over(WritingMode writing_mode,
                              const Length& top,
                              const Length& right) {
  return IsHorizontalWritingMode(writing_mode) ? top : right;
}

const Length& LengthBox::Under(WritingMode writing_mode,
                               const Length& bottom,
                               const Length& left) {
  return IsHorizontalWritingMode(writing_mode) ? bottom : left;
}

const Length& LengthBox::LogicalLeft(WritingMode writing_mode) const {
  return LengthBox::LogicalLeft(writing_mode, left_, top_);
}

const Length& LengthBox::LogicalRight(WritingMode writing_mode) const {
  return LengthBox::LogicalRight(writing_mode, right_, bottom_);
}

const Length& LengthBox::Before(WritingMode writing_mode) const {
  return LengthBox::Before(writing_mode, top_, left_, right_);
}

const Length& LengthBox::After(WritingMode writing_mode) const {
  return LengthBox::After(writing_mode, bottom_, left_, right_);
}

const Length& LengthBox::Start(WritingMode writing_mode,
                               TextDirection direction) const {
  return LengthBox::Start(writing_mode, direction, top_, left_, right_,
                          bottom_);
}

const Length& LengthBox::end(WritingMode writing_mode,
                             TextDirection direction) const {
  return LengthBox::End(writing_mode, direction, top_, left_, right_, bottom_);
}

const Length& LengthBox::Over(WritingMode writing_mode) const {
  return LengthBox::Over(writing_mode, top_, right_);
}

const Length& LengthBox::Under(WritingMode writing_mode) const {
  return LengthBox::Under(writing_mode, bottom_, left_);
}

}  // namespace blink