[LayoutNG] Add NGLineBoxFragment

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/geometry/ng_physical_offset.h"
 #include "core/layout/ng/geometry/ng_physical_size.h"
@@ skipping 14 matching lines @@
 //
 // The fragment keeps a pointer back to the LayoutObject which generated it.
 // Once we have transitioned fully to LayoutNG it should be a const pointer
 // such that paint/hit-testing/etc don't modify it.
 //
 // Layout code should only access geometry information through the
 // NGFragment wrapper classes which transforms information into the logical
 // coordinate system.
 class CORE_EXPORT NGPhysicalFragment : public RefCounted<NGPhysicalFragment> {
  public:
-  enum NGFragmentType { kFragmentBox = 0, kFragmentText = 1 };
+  enum NGFragmentType {
+    kFragmentBox = 0,
+    kFragmentText = 1,
+    kFragmentLineBox = 2
+    // When adding new values, make sure the bit size of |type_| is large
+    // enough to store.
+  };
 
   NGFragmentType Type() const { return static_cast<NGFragmentType>(type_); }
   bool IsBox() const { return Type() == NGFragmentType::kFragmentBox; }
   bool IsText() const { return Type() == NGFragmentType::kFragmentText; }
+  bool IsLineBox() const { return Type() == NGFragmentType::kFragmentLineBox; }
 
   // Override RefCounted's deref() to ensure operator delete is called on the
   // appropriate subclass type.
   void deref() const {
     if (derefBase())
       destroy();
   }
 
   // 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 fragment's content-box.
   LayoutUnit LeftOffset() const {
     DCHECK(is_placed_);
     return offset_.left;
   }
 
   LayoutUnit TopOffset() const {
     DCHECK(is_placed_);
     return offset_.top;
   }
@@ skipping 18 matching lines @@
   // with LegacyLayout.
   LayoutObject* GetLayoutObject() const { return layout_object_; }
 
   bool IsPlaced() const { return is_placed_; }
 
   String ToString() const;
 
  protected:
   NGPhysicalFragment(LayoutObject* layout_object,
                      NGPhysicalSize size,
-                     NGPhysicalSize overflow,
                      NGFragmentType type,
                      RefPtr<NGBreakToken> break_token = nullptr);
 
   LayoutObject* layout_object_;
   NGPhysicalSize size_;
-  NGPhysicalSize overflow_;
   NGPhysicalOffset offset_;
   RefPtr<NGBreakToken> break_token_;
 
-  unsigned type_ : 1;
+  unsigned type_ : 2;
   unsigned is_placed_ : 1;
 
  private:
   void destroy() const;
 };
 
 }  // namespace blink
 
 #endif  // NGPhysicalFragment_h