text: /*
   * 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 "platform/geometry/LayoutRectOutsets.h"
  
  #include <algorithm>
  #include "platform/wtf/Assertions.h"
  
  namespace blink {
  
  LayoutUnit LayoutRectOutsets::LogicalTop(WritingMode writing_mode) const {
    return IsHorizontalWritingMode(writing_mode) ? top_ : left_;
  }
  
  LayoutUnit LayoutRectOutsets::LogicalBottom(WritingMode writing_mode) const {
    return IsHorizontalWritingMode(writing_mode) ? bottom_ : right_;
  }
  
  LayoutUnit LayoutRectOutsets::LogicalLeft(WritingMode writing_mode) const {
    return IsHorizontalWritingMode(writing_mode) ? left_ : top_;
  }
  
  LayoutUnit LayoutRectOutsets::LogicalRight(WritingMode writing_mode) const {
    return IsHorizontalWritingMode(writing_mode) ? right_ : bottom_;
  }
  
  LayoutRectOutsets LayoutRectOutsets::LogicalOutsets(
      WritingMode writing_mode) const {
    if (!IsHorizontalWritingMode(writing_mode))
      return LayoutRectOutsets(left_, bottom_, right_, top_);
    return *this;
  }
  
  LayoutRectOutsets LayoutRectOutsets::LogicalOutsetsWithFlippedLines(
      WritingMode writing_mode) const {
    LayoutRectOutsets outsets = LogicalOutsets(writing_mode);
    if (IsFlippedLinesWritingMode(writing_mode))
      std::swap(outsets.top_, outsets.bottom_);
    return outsets;
  }
  
  LayoutUnit LayoutRectOutsets::Before(WritingMode writing_mode) const {
    switch (writing_mode) {
      case WritingMode::kHorizontalTb:
        return top_;
      case WritingMode::kVerticalLr:
        return left_;
      case WritingMode::kVerticalRl:
        return right_;
    }
    NOTREACHED();
    return top_;
  }
  
  LayoutUnit LayoutRectOutsets::After(WritingMode writing_mode) const {
    switch (writing_mode) {
      case WritingMode::kHorizontalTb:
        return bottom_;
      case WritingMode::kVerticalLr:
        return right_;
      case WritingMode::kVerticalRl:
        return left_;
    }
    NOTREACHED();
    return bottom_;
  }
  
  LayoutUnit LayoutRectOutsets::Start(WritingMode writing_mode,
                                      TextDirection direction) const {
    if (IsHorizontalWritingMode(writing_mode))
      return IsLtr(direction) ? left_ : right_;
    return IsLtr(direction) ? top_ : bottom_;
  }
  
  LayoutUnit LayoutRectOutsets::end(WritingMode writing_mode,
                                    TextDirection direction) const {
    if (IsHorizontalWritingMode(writing_mode))
      return IsLtr(direction) ? right_ : left_;
    return IsLtr(direction) ? bottom_ : top_;
  }
  
  LayoutUnit LayoutRectOutsets::Over(WritingMode writing_mode) const {
    return IsHorizontalWritingMode(writing_mode) ? top_ : right_;
  }
  
  LayoutUnit LayoutRectOutsets::Under(WritingMode writing_mode) const {
    return IsHorizontalWritingMode(writing_mode) ? bottom_ : left_;
  }
  
  void LayoutRectOutsets::SetBefore(WritingMode writing_mode, LayoutUnit value) {
    switch (writing_mode) {
      case WritingMode::kHorizontalTb:
        top_ = value;
        break;
      case WritingMode::kVerticalLr:
        left_ = value;
        break;
      case WritingMode::kVerticalRl:
        right_ = value;
        break;
      default:
        NOTREACHED();
        top_ = value;
    }
  }
  
  void LayoutRectOutsets::SetAfter(WritingMode writing_mode, LayoutUnit value) {
    switch (writing_mode) {
      case WritingMode::kHorizontalTb:
        bottom_ = value;
        break;
      case WritingMode::kVerticalLr:
        right_ = value;
        break;
      case WritingMode::kVerticalRl:
        left_ = value;
        break;
      default:
        NOTREACHED();
        bottom_ = value;
    }
  }
  
  void LayoutRectOutsets::SetStart(WritingMode writing_mode,
                                   TextDirection direction,
                                   LayoutUnit value) {
    if (IsHorizontalWritingMode(writing_mode)) {
      if (IsLtr(direction))
        left_ = value;
      else
        right_ = value;
    } else {
      if (IsLtr(direction))
        top_ = value;
      else
        bottom_ = value;
    }
  }
  
  void LayoutRectOutsets::SetEnd(WritingMode writing_mode,
                                 TextDirection direction,
                                 LayoutUnit value) {
    if (IsHorizontalWritingMode(writing_mode)) {
      if (IsLtr(direction))
        right_ = value;
      else
        left_ = value;
    } else {
      if (IsLtr(direction))
        bottom_ = value;
      else
        top_ = value;
    }
  }
  
  }  // namespace blink
  