[layoutng] Add an NGFragmentBuilder

third_party/WebKit/Source/core/layout/ng/ng_box.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/layout/ng/ng_box.h"
 
 #include "core/layout/LayoutObject.h"
 #include "core/layout/ng/layout_ng_block_flow.h"
 #include "core/layout/ng/ng_block_layout_algorithm.h"
 #include "core/layout/ng/ng_box_iterator.h"
 #include "core/layout/ng/ng_fragment.h"
+#include "core/layout/ng/ng_fragment_builder.h"
 #include "core/layout/LayoutBlockFlow.h"
 #include "core/layout/LayoutBox.h"
 
 namespace blink {
 
 NGFragment* NGBox::layout(const NGConstraintSpace& constraintSpace) {
   // We can either use the new layout code to do the layout and then copy the
   // resulting size to the LayoutObject, or use the old layout code and
   // synthesize a fragment.
   NGFragment* fragment = nullptr;
   if (canUseNewLayout()) {
     NGBlockLayoutAlgorithm algorithm(style(), childIterator());
     fragment = algorithm.layout(constraintSpace);
-    m_layoutBox->setLogicalWidth(fragment->inlineSize());
-    m_layoutBox->setLogicalHeight(fragment->blockSize());
+    m_layoutBox->setLogicalWidth(fragment->InlineSize());
+    m_layoutBox->setLogicalHeight(fragment->BlockSize());
     if (m_layoutBox->isLayoutBlock())
       toLayoutBlock(m_layoutBox)->layoutPositionedObjects(true);
     m_layoutBox->clearNeedsLayout();
   } else {
     // TODO(layout-ng): If fixedSize is true, set the override width/height too
     NGLogicalSize containerSize = constraintSpace.ContainerSize();
     m_layoutBox->setOverrideContainingBlockContentLogicalWidth(
         containerSize.inlineSize);
     m_layoutBox->setOverrideContainingBlockContentLogicalHeight(
         containerSize.blockSize);
     if (m_layoutBox->isLayoutNGBlockFlow() && m_layoutBox->needsLayout()) {
       toLayoutNGBlockFlow(m_layoutBox)->LayoutBlockFlow::layoutBlock(true);
     } else {
       m_layoutBox->layoutIfNeeded();
     }
     LayoutRect overflow = m_layoutBox->layoutOverflowRect();
     // TODO(layout-ng): This does not handle writing modes correctly (for
     // overflow & the enums)
-    fragment = new NGFragment(
-        m_layoutBox->logicalWidth(), m_layoutBox->logicalHeight(),
-        overflow.width(), overflow.height(), HorizontalTopBottom, LeftToRight);
+    NGFragmentBuilder builder(NGFragmentBase::FragmentBox);
+    builder.SetInlineSize(m_layoutBox->logicalWidth())
+        .SetBlockSize(m_layoutBox->logicalHeight())
+        .SetInlineOverflow(overflow.width())
+        .SetBlockOverflow(overflow.height());
+    fragment = builder.ToFragment();
   }
   return fragment;
 }
 
 const ComputedStyle* NGBox::style() const {
   return m_layoutBox->style();
 }
 
 NGBoxIterator NGBox::childIterator() {
   return NGBoxIterator(firstChild());
 }
 
 NGBox NGBox::nextSibling() const {
   return m_layoutBox ? NGBox(m_layoutBox->nextSibling()) : NGBox();
 }
 
 NGBox NGBox::firstChild() const {
   return m_layoutBox ? NGBox(m_layoutBox->slowFirstChild()) : NGBox();
 }
 
 void NGBox::positionUpdated(const NGFragment& fragment) {
-  m_layoutBox->setLogicalLeft(fragment.inlineOffset());
-  m_layoutBox->setLogicalTop(fragment.blockOffset());
+  m_layoutBox->setLogicalLeft(fragment.InlineOffset());
+  m_layoutBox->setLogicalTop(fragment.BlockOffset());
 }
 
 bool NGBox::canUseNewLayout() {
   if (!m_layoutBox)
     return true;
   if (m_layoutBox->isLayoutBlockFlow() && !m_layoutBox->childrenInline())
     return true;
   return false;
 }
 }  // namespace blink