Views: Extract text selection code from Textfield.

ui/gfx/render_text.cc

 // Copyright (c) 2012 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.
 
 #include "ui/gfx/render_text.h"
 
 #include <limits.h>
 
 #include <algorithm>
 #include <climits>
@@ skipping 669 matching lines @@
               std::min(model.caret_pos(), text_length));
   // The current model only supports caret positions at valid cursor indices.
   if (!IsValidCursorIndex(range.start()) || !IsValidCursorIndex(range.end()))
     return false;
   SelectionModel sel(range, model.caret_affinity());
   bool changed = sel != selection_model_;
   SetSelectionModel(sel);
   return changed;
 }
 
+bool RenderText::MoveCursorTo(const gfx::Point& point, bool select) {
+  gfx::SelectionModel model = FindCursorPosition(point);
+  if (select)
+    model.set_selection_start(selection().start());
+  return MoveCursorTo(model);
+}
+
 bool RenderText::SelectRange(const Range& range) {
   uint32_t text_length = static_cast<uint32_t>(text().length());
   Range sel(std::min(range.start(), text_length),
             std::min(range.end(), text_length));
   // Allow selection bounds at valid indicies amid multi-character graphemes.
   if (!IsValidLogicalIndex(sel.start()) || !IsValidLogicalIndex(sel.end()))
     return false;
   LogicalCursorDirection affinity =
       (sel.is_reversed() || sel.is_empty()) ? CURSOR_FORWARD : CURSOR_BACKWARD;
   SetSelectionModel(SelectionModel(sel, affinity));
@@ skipping 984 matching lines @@
 
   for (; range_max < length; ++range_max)
     if (iter.IsEndOfWord(range_max) || iter.IsStartOfWord(range_max))
       break;
 
   return range.is_reversed() ? Range(range_max, range_min)
                              : Range(range_min, range_max);
 }
 
 }  // namespace gfx