[LayoutNG] Add writing mode to NGDerivedConstraintSpace

third_party/WebKit/Source/core/layout/ng/ng_constraint_space.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 NGConstraintSpace_h
 #define NGConstraintSpace_h
 
 #include "core/CoreExport.h"
 #include "platform/LayoutUnit.h"
 #include "wtf/DoublyLinkedList.h"
@@ skipping 22 matching lines @@
 };
 
 enum NGExclusionFlowType {
   ExcludeNone,
   ExcludeInlineFlow,
   ExcludeInlineStart,
   ExcludeInlineEnd,
   ExcludeInlineBoth
 };
 
+enum NGWritingMode {
+  HorizontalTopBottom = 0,
+  VerticalRightLeft = 1,
+  VerticalLeftRight = 2,
+  SidewaysRightLeft = 3,
+  SidewaysLeftRight = 4
+};
+
+enum NGDirection { LeftToRight = 0, RightToLeft = 1 };
+
 class NGExclusion {
  public:
   NGExclusion();
   ~NGExclusion() {}
 };
 
 class CORE_EXPORT NGConstraintSpace {
  public:
   NGConstraintSpace(LayoutUnit inlineContainerSize,
                     LayoutUnit blockContainerSize);
@@ skipping 70 matching lines @@
   ~NGLayoutOpportunityIterator() {}
 
   const NGDerivedConstraintSpace* next();
 
  private:
   const NGConstraintSpace* m_constraintSpace;
   unsigned m_clear;
   NGExclusionFlowType m_avoid;
 };
 
-class CORE_EXPORT NGDerivedConstraintSpace final : NGConstraintSpace {
- public:
-  ~NGDerivedConstraintSpace();
-
-  LayoutUnit inlineOffset() const;
-  LayoutUnit blockOffset() const;
-  LayoutUnit inlineSize() const;
-  LayoutUnit blockSize() const;
-
- private:
-  NGDerivedConstraintSpace();
-
-  LayoutUnit m_inlineOffset;
-  LayoutUnit m_blockOffset;
-  LayoutUnit m_inlineSize;
-  LayoutUnit m_blockSize;
-  NGConstraintSpace* m_original;
-};
-
 }  // namespace blink
 
 #endif  // NGConstraintSpace_h