Clean up of SelectionModel

ui/gfx/render_text.h

 // Copyright (c) 2011 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 UI_GFX_RENDER_TEXT_H_
 #define UI_GFX_RENDER_TEXT_H_
 #pragma once
 
 #include <algorithm>
 #include <vector>
@@ skipping 82 matching lines @@
   const Rect& display_rect() const { return display_rect_; }
   virtual void SetDisplayRect(const Rect& r);
 
   // This cursor position corresponds to SelectionModel::selection_end. In
   // addition to representing the selection end, it's also where logical text
   // edits take place, and doesn't necessarily correspond to
   // SelectionModel::caret_pos.
   size_t GetCursorPosition() const;
   void SetCursorPosition(size_t position);
 
-  void SetCaretPlacement(SelectionModel::CaretPlacement placement) {
-      selection_model_.set_caret_placement(placement);
-  }
-
   // Moves the cursor left or right. Cursor movement is visual, meaning that
   // left and right are relative to screen, not the directionality of the text.
   // If |select| is false, the selection start is moved to the same position.
   void MoveCursorLeft(BreakType break_type, bool select);
   void MoveCursorRight(BreakType break_type, bool select);
 
   // Set the selection_model_ to the value of |selection|.
   // The selection model components are modified if invalid.
   // Returns true if the cursor position or selection range changed.
   // If |selectin_start_| or |selection_end_| or |caret_pos_| in
   // |selection_model| is not a cursorable position (not on grapheme boundary),
   // it is a NO-OP and returns false.
   bool MoveCursorTo(const SelectionModel& selection_model);
 
   // Move the cursor to the position associated with the clicked point.
   // If |select| is false, the selection start is moved to the same position.
   // Returns true if the cursor position or selection range changed.
   bool MoveCursorTo(const Point& point, bool select);
 
+  // Set the selection_model_ based on |range|.
+  // If the |range| start or end is greater than text length, it is modified
+  // to be the text length.
+  // If the |range| start or end is not a cursorable position (not on grapheme
+  // boundary), it is a NO-OP and returns false. Otherwise, returns true.
+  bool SelectRange(const ui::Range& range);
+
   size_t GetSelectionStart() const {
       return selection_model_.selection_start();
   }
   size_t MinOfSelection() const {
       return std::min(GetSelectionStart(), GetCursorPosition());
   }
   size_t MaxOfSelection() const {
       return std::max(GetSelectionStart(), GetCursorPosition());
   }
   bool EmptySelection() const {
@@ skipping 153 matching lines @@
   // The cached bounds and offset are invalidated by changes to the cursor,
   // selection, font, and other operations that adjust the visible text bounds.
   bool cached_bounds_and_offset_valid_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderText);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_RENDER_TEXT_H_