Optimize for horizontal writing mode

Source/core/rendering/RenderBox.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 4321 matching lines @@
     return adjustedPositionRelativeToOffsetParent(topLeftLocation()).x();
 }
 
 LayoutUnit RenderBox::offsetTop() const
 {
     return adjustedPositionRelativeToOffsetParent(topLeftLocation()).y();
 }
 
 LayoutPoint RenderBox::flipForWritingModeForChild(const RenderBox* child, const LayoutPoint& point) const
 {
+    if (!UNLIKELY(document().hasVerticalWritingMode()))
+        return point;
     if (!style()->isFlippedBlocksWritingMode())
         return point;
 
     // The child is going to add in its x() and y(), so we have to make sure it ends up in
     // the right place.
     if (isHorizontalWritingMode())
         return LayoutPoint(point.x(), point.y() + height() - child->height() - (2 * child->y()));
     return LayoutPoint(point.x() + width() - child->width() - (2 * child->x()), point.y());
 }
 
-void RenderBox::flipForWritingMode(LayoutRect& rect) const
-{
-    if (!style()->isFlippedBlocksWritingMode())
-        return;
-
-    if (isHorizontalWritingMode())
-        rect.setY(height() - rect.maxY());
-    else
-        rect.setX(width() - rect.maxX());
-}
-
-LayoutUnit RenderBox::flipForWritingMode(LayoutUnit position) const
-{
-    if (!style()->isFlippedBlocksWritingMode())
-        return position;
-    return logicalHeight() - position;
-}
-
-LayoutPoint RenderBox::flipForWritingMode(const LayoutPoint& position) const
-{
-    if (!style()->isFlippedBlocksWritingMode())
-        return position;
-    return isHorizontalWritingMode() ? LayoutPoint(position.x(), height() - position.y()) : LayoutPoint(width() - position.x(), position.y());
-}
-
 LayoutPoint RenderBox::flipForWritingModeIncludingColumns(const LayoutPoint& point) const
 {
+    if (!UNLIKELY(document().hasVerticalWritingMode()))
+        return point;
     if (!hasColumns() || !style()->isFlippedBlocksWritingMode())
         return flipForWritingMode(point);
     return toRenderBlock(this)->flipForWritingModeIncludingColumns(point);
 }
 
-LayoutSize RenderBox::flipForWritingMode(const LayoutSize& offset) const
-{
-    if (!style()->isFlippedBlocksWritingMode())
-        return offset;
-    return isHorizontalWritingMode() ? LayoutSize(offset.width(), height() - offset.height()) : LayoutSize(width() - offset.width(), offset.height());
-}
-
-FloatPoint RenderBox::flipForWritingMode(const FloatPoint& position) const
-{
-    if (!style()->isFlippedBlocksWritingMode())
-        return position;
-    return isHorizontalWritingMode() ? FloatPoint(position.x(), height() - position.y()) : FloatPoint(width() - position.x(), position.y());
-}
-
-void RenderBox::flipForWritingMode(FloatRect& rect) const
-{
-    if (!style()->isFlippedBlocksWritingMode())
-        return;
-
-    if (isHorizontalWritingMode())
-        rect.setY(height() - rect.maxY());
-    else
-        rect.setX(width() - rect.maxX());
-}
-
 LayoutPoint RenderBox::topLeftLocation() const
 {
     RenderBlock* containerBlock = containingBlock();
     if (!containerBlock || containerBlock == this)
         return location();
     return containerBlock->flipForWritingModeForChild(this, location());
 }
 
 LayoutSize RenderBox::topLeftLocationOffset() const
 {
@@ skipping 106 matching lines @@
     ASSERT(style()->hasBackground() || style()->hasBoxDecorations());
 
     if (m_rareData && m_rareData->m_previousBorderBoxSize.width() != -1)
         return m_rareData->m_previousBorderBoxSize;
 
     // We didn't save the old border box size because it was the same as the size of oldBounds.
     return previousBoundsSize;
 }
 
 } // namespace blink