Move layouet/LayoutView::setSelection() to editing/LayoutSelection

third_party/WebKit/Source/core/editing/LayoutSelection.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 23 matching lines @@
 class LayoutSelection final : public GarbageCollected<LayoutSelection> {
  public:
   static LayoutSelection* Create(FrameSelection& frame_selection) {
     return new LayoutSelection(frame_selection);
   }
 
   bool HasPendingSelection() const { return has_pending_selection_; }
   void SetHasPendingSelection() { has_pending_selection_ = true; }
   void Commit(LayoutView&);
 
+  IntRect SelectionBounds();
+  void InvalidatePaintForSelection();
+  enum SelectionPaintInvalidationMode {
+    kPaintInvalidationNewXOROld,
+    kPaintInvalidationNewMinusOld
+  };
+  void SetSelection(
+      LayoutObject* start,
+      int start_pos,
+      LayoutObject*,
+      int end_pos,
+      SelectionPaintInvalidationMode = kPaintInvalidationNewXOROld);
+  void ClearSelection();
+  void SelectionStartEnd(int& start_pos, int& end_pos);
+  void OnDocumentShutdown();
+
   DECLARE_TRACE();
 
  private:
   LayoutSelection(FrameSelection&);
 
   const VisibleSelection& GetVisibleSelection() const;
 
   SelectionInFlatTree CalcVisibleSelection(
       const VisibleSelectionInFlatTree&) const;
 
   Member<FrameSelection> frame_selection_;
   bool has_pending_selection_ : 1;
+
+  // The current selection represented as 2 boundaries.
+  // Selection boundaries are represented in LayoutView by a tuple
+  // (LayoutObject, DOM node offset).
+  // See http://www.w3.org/TR/dom/#range for more information.
+  //
+  // |m_selectionStartPos| and |m_selectionEndPos| are only valid for
+  // |Text| node without 'transform' or 'first-letter'.
+  //
+  // Those are used for selection painting and paint invalidation upon
+  // selection change.
+  LayoutObject* selection_start_;
+  LayoutObject* selection_end_;
+
+  // TODO(yosin): Clarify the meaning of these variables. editing/ passes
+  // them as offsets in the DOM tree  but layout uses them as offset in the
+  // layout tree.
+  int selection_start_pos_;
+  int selection_end_pos_;
 };
 
 }  // namespace blink
 
 #endif