[ng_layout] Rename NGFragmentBase,NGFragment,NGPhysicalFragment

third_party/WebKit/Source/core/layout/ng/ng_physical_fragment.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 NGPhysicalFragment_h
 #define NGPhysicalFragment_h
 
 #include "core/CoreExport.h"
-#include "core/layout/ng/ng_physical_fragment_base.h"
 #include "core/layout/ng/ng_units.h"
+#include "platform/LayoutUnit.h"
 #include "platform/heap/Handle.h"
+#include "wtf/Vector.h"
 
 namespace blink {
 
 class NGBlockNode;
+class NGBreakToken;
 
-class CORE_EXPORT NGPhysicalFragment final : public NGPhysicalFragmentBase {
+// The NGPhysicalFragmentBase contains the output information from layout. The
+// fragment stores all of its information in the physical coordinate system for
+// use by paint, hit-testing etc.
+//
+// Layout code should only access output layout information through the
+// NGFragmentBase classes which transforms information into the logical
+// coordinate system.
+class CORE_EXPORT NGPhysicalFragment
+    : public GarbageCollectedFinalized<NGPhysicalFragment> {
  public:
-  // This modifies the passed-in children vector.
+  enum NGFragmentType { kFragmentBox = 0, kFragmentText = 1 };
+
+  NGFragmentType Type() const { return static_cast<NGFragmentType>(type_); }
+
+  // The accessors in this class shouldn't be used by layout code directly,
+  // instead should be accessed by the NGFragmentBase classes. These accessors
+  // exist for paint, hit-testing, etc.
+
+  // Returns the border-box size.
+  NGPhysicalSize Size() const { return size_; }
+  LayoutUnit Width() const { return size_.width; }
+  LayoutUnit Height() const { return size_.height; }
+
+  // Returns the total size, including the contents outside of the border-box.
+  LayoutUnit WidthOverflow() const { return overflow_.width; }
+  LayoutUnit HeightOverflow() const { return overflow_.height; }
+
+  // Returns the offset relative to the parent fragement's content-box.
+  LayoutUnit LeftOffset() const {
+    DCHECK(has_been_placed_);
+    return offset_.left;
+  }
+
+  LayoutUnit TopOffset() const {
+    DCHECK(has_been_placed_);
+    return offset_.top;
+  }
+
+  // Should only be used by the parent fragement's layout.
+  void SetOffset(NGPhysicalOffset offset) {
+    DCHECK(!has_been_placed_);
+    offset_ = offset;
+    has_been_placed_ = true;
+  }
+
+  const HeapLinkedHashSet<WeakMember<NGBlockNode>>& OutOfFlowDescendants()
+      const {
+    return out_of_flow_descendants_;
+  }
+
+  const Vector<NGStaticPosition>& OutOfFlowPositions() const {
+    return out_of_flow_positions_;
+  }
+
+  DECLARE_TRACE_AFTER_DISPATCH();
+  DECLARE_TRACE();
+
+  void finalizeGarbageCollectedObject();
+
+ protected:
   NGPhysicalFragment(
       NGPhysicalSize size,
       NGPhysicalSize overflow,
-      HeapVector<Member<const NGPhysicalFragmentBase>>& children,
+      NGFragmentType type,
       HeapLinkedHashSet<WeakMember<NGBlockNode>>& out_of_flow_descendants,
-      Vector<NGStaticPosition>& out_of_flow_positions,
-      NGMarginStrut margin_strut);
+      Vector<NGStaticPosition> out_of_flow_positions,
+      NGBreakToken* break_token = nullptr);
 
-  const HeapVector<Member<const NGPhysicalFragmentBase>>& Children() const {
-    return children_;
-  }
+  NGPhysicalSize size_;
+  NGPhysicalSize overflow_;
+  NGPhysicalOffset offset_;
+  Member<NGBreakToken> break_token_;
+  HeapLinkedHashSet<WeakMember<NGBlockNode>> out_of_flow_descendants_;
+  Vector<NGStaticPosition> out_of_flow_positions_;
 
-  NGMarginStrut MarginStrut() const { return margin_strut_; }
-
-  DECLARE_TRACE_AFTER_DISPATCH();
-
- private:
-  HeapVector<Member<const NGPhysicalFragmentBase>> children_;
-  NGMarginStrut margin_strut_;
+  unsigned type_ : 1;
+  unsigned has_been_placed_ : 1;
 };
 
-WILL_NOT_BE_EAGERLY_TRACED_CLASS(NGPhysicalFragment);
-
-DEFINE_TYPE_CASTS(NGPhysicalFragment,
-                  NGPhysicalFragmentBase,
-                  fragment,
-                  fragment->Type() == NGPhysicalFragmentBase::kFragmentBox,
-                  fragment.Type() == NGPhysicalFragmentBase::kFragmentBox);
-
 }  // namespace blink
 
 #endif  // NGPhysicalFragment_h