Create LineLayout api

Source/core/layout/line/LineWidth.cpp

 /*
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above
  *    copyright notice, this list of conditions and the following
  *    disclaimer.
@@ skipping 17 matching lines @@
  */
 
 #include "config.h"
 #include "core/layout/line/LineWidth.h"
 
 #include "core/layout/LayoutBlock.h"
 #include "core/layout/LayoutRubyRun.h"
 
 namespace blink {
 
-LineWidth::LineWidth(LayoutBlockFlow& block, bool isFirstLine, IndentTextOrNot shouldIndentText)
+LineWidth::LineWidth(LineLayoutBlockFlow block, bool isFirstLine, IndentTextOrNot shouldIndentText)
     : m_block(block)
     , m_uncommittedWidth(0)
     , m_committedWidth(0)
     , m_overhangWidth(0)
     , m_trailingWhitespaceWidth(0)
     , m_left(0)
     , m_right(0)
     , m_availableWidth(0)
     , m_isFirstLine(isFirstLine)
     , m_shouldIndentText(shouldIndentText)
@@ skipping 63 matching lines @@
     rubyRun->getOverhang(m_isFirstLine, startLayoutObject, endLayoutObject, startOverhang, endOverhang);
 
     startOverhang = std::min<int>(startOverhang, m_committedWidth);
     m_availableWidth += startOverhang;
 
     endOverhang = std::max(std::min<int>(endOverhang, m_availableWidth - currentWidth()), 0);
     m_availableWidth += endOverhang;
     m_overhangWidth += startOverhang + endOverhang;
 }
 
-inline static float availableWidthAtOffset(const LayoutBlockFlow& block, const LayoutUnit& offset, bool shouldIndentText, float& newLineLeft,
+inline static float availableWidthAtOffset(LineLayoutBlockFlow block, const LayoutUnit& offset, bool shouldIndentText, float& newLineLeft,
     float& newLineRight, const LayoutUnit& lineHeight = 0)
 {
     newLineLeft = block.logicalLeftOffsetForLine(offset, shouldIndentText, lineHeight).toFloat();
     newLineRight = block.logicalRightOffsetForLine(offset, shouldIndentText, lineHeight).toFloat();
     return std::max(0.0f, newLineRight - newLineLeft);
 }
 
 void LineWidth::updateLineDimension(LayoutUnit newLineTop, LayoutUnit newLineWidth, const float& newLineLeft, const float& newLineRight)
 {
     if (newLineWidth <= m_availableWidth)
@@ skipping 33 matching lines @@
     ASSERT(!m_committedWidth);
     ASSERT(!fitsOnLine());
     m_block.positionNewFloats(this);
 
     LayoutUnit floatLogicalBottom;
     LayoutUnit lastFloatLogicalBottom = m_block.logicalHeight();
     float newLineWidth = m_availableWidth;
     float newLineLeft = m_left;
     float newLineRight = m_right;
 
-    FloatingObject* lastFloatFromPreviousLine = (m_block.containsFloats() ? m_block.m_floatingObjects->set().last().get() : 0);
+    FloatingObject* lastFloatFromPreviousLine = m_block.lastFloatFromPreviousLine();
         if (lastFloatFromPreviousLine && lastFloatFromPreviousLine->layoutObject()->shapeOutsideInfo())
             return wrapNextToShapeOutside(isFirstLine);
 
     while (true) {
         floatLogicalBottom = m_block.nextFloatLogicalBottomBelow(lastFloatLogicalBottom, ShapeOutsideFloatShapeOffset);
         if (floatLogicalBottom <= lastFloatLogicalBottom)
             break;
 
         newLineWidth = availableWidthAtOffset(m_block, floatLogicalBottom, shouldIndentText(), newLineLeft, newLineRight);
         lastFloatLogicalBottom = floatLogicalBottom;
 
         if (newLineWidth >= m_uncommittedWidth)
             break;
     }
     updateLineDimension(lastFloatLogicalBottom, newLineWidth, newLineLeft, newLineRight);
 }
 
 void LineWidth::computeAvailableWidthFromLeftAndRight()
 {
     m_availableWidth = max(0.0f, m_right - m_left) + m_overhangWidth;
 }
 
 }