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 "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 TopToBottomWritingMode:
        return m_top;
      case LeftToRightWritingMode:
        return m_left;
      case RightToLeftWritingMode:
        return m_right;
    }
    ASSERT_NOT_REACHED();
    return m_top;
  }
  
  LayoutUnit LayoutRectOutsets::after(WritingMode writingMode) const {
    switch (writingMode) {
      case TopToBottomWritingMode:
        return m_bottom;
      case LeftToRightWritingMode:
        return m_right;
      case RightToLeftWritingMode:
        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 TopToBottomWritingMode:
        m_top = value;
        break;
      case LeftToRightWritingMode:
        m_left = value;
        break;
      case RightToLeftWritingMode:
        m_right = value;
        break;
      default:
        ASSERT_NOT_REACHED();
        m_top = value;
    }
  }
  
  void LayoutRectOutsets::setAfter(WritingMode writingMode, LayoutUnit value) {
    switch (writingMode) {
      case TopToBottomWritingMode:
        m_bottom = value;
        break;
      case LeftToRightWritingMode:
        m_right = value;
        break;
      case RightToLeftWritingMode:
        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
  