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

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#include "platform/geometry/LayoutRectOutsets.h"

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

namespace blink {

void LayoutRectOutsets::ClampNegativeToZero() {
  top_ = top_.ClampNegativeToZero();
  right_ = right_.ClampNegativeToZero();
  bottom_ = bottom_.ClampNegativeToZero();
  left_ = left_.ClampNegativeToZero();
}

void LayoutRectOutsets::Unite(const LayoutRectOutsets& other) {
  top_ = std::max(top_, other.top_);
  right_ = std::max(right_, other.right_);
  bottom_ = std::max(bottom_, other.bottom_);
  left_ = std::max(left_, other.left_);
}

LayoutRectOutsets LayoutRectOutsets::LineOrientationOutsets(
    WritingMode writing_mode) const {
  if (!IsHorizontalWritingMode(writing_mode))
    return LayoutRectOutsets(left_, bottom_, right_, top_);
  return *this;
}

LayoutRectOutsets LayoutRectOutsets::LineOrientationOutsetsWithFlippedLines(
    WritingMode writing_mode) const {
  LayoutRectOutsets outsets = LineOrientationOutsets(writing_mode);
  if (IsFlippedLinesWritingMode(writing_mode))
    std::swap(outsets.top_, outsets.bottom_);
  return outsets;
}

}  // namespace blink