[LayoutNG] Abort a layout once the BFC offset is resolved.

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

 // 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.
 
 #ifndef NGFragmentBuilder_h
 #define NGFragmentBuilder_h
 
 #include "core/layout/ng/geometry/ng_static_position.h"
 #include "core/layout/ng/inline/ng_baseline.h"
 #include "core/layout/ng/inline/ng_physical_text_fragment.h"
 #include "core/layout/ng/ng_break_token.h"
 #include "core/layout/ng/ng_constraint_space.h"
+#include "core/layout/ng/ng_layout_result.h"
 #include "core/layout/ng/ng_out_of_flow_positioned_descendant.h"
 #include "core/layout/ng/ng_physical_fragment.h"
 #include "core/layout/ng/ng_positioned_float.h"
 #include "core/layout/ng/ng_unpositioned_float.h"
 #include "platform/wtf/Allocator.h"
 
 namespace blink {
 
-class NGLayoutResult;
-
 class CORE_EXPORT NGFragmentBuilder final {
   DISALLOW_NEW();
 
  public:
   NGFragmentBuilder(NGPhysicalFragment::NGFragmentType, NGLayoutInputNode);
 
   // Build a fragment for LayoutObject without NGLayoutInputNode. LayoutInline
   // has NGInlineItem but does not have corresponding NGLayoutInputNode.
   NGFragmentBuilder(NGPhysicalFragment::NGFragmentType, LayoutObject*);
 
@@ skipping 11 matching lines @@
   NGFragmentBuilder& SetBlockOverflow(LayoutUnit);
 
   NGFragmentBuilder& AddChild(RefPtr<NGLayoutResult>, const NGLogicalOffset&);
   NGFragmentBuilder& AddChild(RefPtr<NGPhysicalFragment>,
                               const NGLogicalOffset&);
 
   NGFragmentBuilder& AddPositionedFloat(NGPositionedFloat);
 
   NGFragmentBuilder& SetBfcOffset(const NGLogicalOffset& offset);
 
-  NGFragmentBuilder& AddUnpositionedFloat(
-      RefPtr<NGUnpositionedFloat> unpositioned_float);
-
   // Builder has non-trivial out-of-flow descendant methods.
   // These methods are building blocks for implementation of
   // out-of-flow descendants by layout algorithms.
   //
   // They are intended to be used by layout algorithm like this:
   //
   // Part 1: layout algorithm positions in-flow children.
   //   out-of-flow children, and out-of-flow descendants of fragments
   //   are stored inside builder.
   //
@@ skipping 34 matching lines @@
     end_margin_strut_ = from;
     return *this;
   }
 
   // Offsets are not supposed to be set during fragment construction, so we
   // do not provide a setter here.
 
   // Creates the fragment. Can only be called once.
   RefPtr<NGLayoutResult> ToBoxFragment();
 
-  Vector<RefPtr<NGPhysicalFragment>>& MutableChildren() { return children_; }
+  RefPtr<NGLayoutResult> Abort(NGLayoutResult::NGLayoutResultStatus);
 
   Vector<NGLogicalOffset>& MutableOffsets() { return offsets_; }
 
-  // Mutable list of floats that need to be positioned.
-  Vector<RefPtr<NGUnpositionedFloat>>& MutableUnpositionedFloats() {
-    return unpositioned_floats_;
-  }
-
-  // List of floats that need to be positioned.
-  const Vector<RefPtr<NGUnpositionedFloat>>& UnpositionedFloats() const {
-    return unpositioned_floats_;
+  void SwapUnpositionedFloats(
+      Vector<RefPtr<NGUnpositionedFloat>>* unpositioned_floats) {
+    unpositioned_floats_.swap(*unpositioned_floats);
   }
 
   const WTF::Optional<NGLogicalOffset>& BfcOffset() const {
     return bfc_offset_;
   }
 
   const Vector<RefPtr<NGPhysicalFragment>>& Children() const {
     return children_;
   }
 
@@ skipping 61 matching lines @@
   NGMarginStrut end_margin_strut_;
 
   Vector<NGBaseline> baselines_;
 
   NGBorderEdges border_edges_;
 };
 
 }  // namespace blink
 
 #endif  // NGFragmentBuilder