[LayoutNG] Implement atomic inlines for LayoutNGInline

third_party/WebKit/Source/core/layout/ng/ng_line_builder.h

Index: third_party/WebKit/Source/core/layout/ng/ng_line_builder.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_line_builder.h b/third_party/WebKit/Source/core/layout/ng/ng_line_builder.h
index f37b180b75c9e38aa1340290121550e48128315e..4f3c6e8fc5a6308cce70f7e39569cecef4f22c5f 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_line_builder.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_line_builder.h
@@ -86,7 +86,20 @@ class CORE_EXPORT NGLineBuilder final {
   // are placed.
   void CopyFragmentDataToLayoutBlockFlow();
 
+  // Compute inline size of an NGLayoutInlineItem.
+  // Same as NGLayoutInlineItem::InlineSize(), except that this function can
+  // compute atomic inlines by laying out them.
+  LayoutUnit InlineSize(const NGLayoutInlineItem&);
+
  private:
+  bool IsHorizontalWritingMode() const { return is_horizontal_writing_mode_; }
+
+  LayoutUnit InlineSize(const NGLayoutInlineItem&,
+                        unsigned start_offset,
+                        unsigned end_offset);
+  LayoutUnit InlineSizeFromLayout(const NGLayoutInlineItem&);
+  RefPtr<NGLayoutResult>& LayoutItem(const NGLayoutInlineItem&);
+
   struct LineItemChunk {
     unsigned index;
     unsigned start_offset;
@@ -136,6 +149,10 @@ class CORE_EXPORT NGLineBuilder final {
   void AccumulateUsedFonts(const NGLayoutInlineItem&,
                            const LineItemChunk&,
                            LineBoxData*);
+  LayoutUnit PlaceAtomicInline(const NGLayoutInlineItem&,
+                               LayoutUnit estimated_baseline,
+                               LineBoxData*,
+                               NGFragmentBuilder*);
 
   // Finds the next layout opportunity for the next text fragment.
   void FindNextLayoutOpportunity();
@@ -143,6 +160,7 @@ class CORE_EXPORT NGLineBuilder final {
   Persistent<NGInlineNode> inline_box_;
   NGConstraintSpace* constraint_space_;  // Not owned as STACK_ALLOCATED.
   NGFragmentBuilder* containing_block_builder_;
+  Vector<RefPtr<NGLayoutResult>, 32> layout_results_;
   Vector<RefPtr<NGPhysicalFragment>, 32> fragments_;
   Vector<NGLogicalOffset, 32> offsets_;
   Vector<LineBoxData, 32> line_box_data_list_;
@@ -156,11 +174,12 @@ class CORE_EXPORT NGLineBuilder final {
   LayoutUnit last_break_opportunity_position_;
   LayoutUnit content_size_;
   LayoutUnit max_inline_size_;
-  FontBaseline baseline_type_;
+  FontBaseline baseline_type_ = FontBaseline::AlphabeticBaseline;
 
   NGLogicalOffset bfc_offset_;
   NGLogicalRect current_opportunity_;
 
+  unsigned is_horizontal_writing_mode_ : 1;
 #if DCHECK_IS_ON()
   unsigned is_bidi_reordered_ : 1;
 #endif