[MacViews] Implemented text context menu

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 1015 matching lines @@
   const SelectionModel model_at_point = FindCursorPosition(point);
   const size_t word_index =
       GetNearestWordStartBoundary(model_at_point.caret_pos());
   if (word_index >= text().length())
     return false;
 
   const Range word_range = ExpandRangeToWordBoundary(Range(word_index));
   DCHECK(!word_range.is_reversed());
   DCHECK(!word_range.is_empty());
 
-  const std::vector<Rect> word_bounds = GetSubstringBounds(word_range);
-  if (word_bounds.empty() ||
-      !GetDecoratedTextForRange(word_range, decorated_word)) {
+  return GetDecoratedTextForRange(word_range, decorated_word, baseline_point);
+}
+
+bool RenderText::GetDecoratedTextForRange(const Range& range,
+                                          DecoratedText* decorated_text,
+                                          Point* baseline_point) {
+  if (range.is_empty() || !GetDecoratedTextForRange(range, decorated_text))
     return false;
-  }
 
   // Retrieve the baseline origin of the left-most glyph.
+  const std::vector<Rect> text_bounds = GetSubstringBounds(range);
+  if (text_bounds.empty())
+    return false;
+
   const auto left_rect = std::min_element(
-      word_bounds.begin(), word_bounds.end(),
+      text_bounds.begin(), text_bounds.end(),
       [](const Rect& lhs, const Rect& rhs) { return lhs.x() < rhs.x(); });
+
   *baseline_point = left_rect->origin() + Vector2d(0, GetDisplayTextBaseline());
   return true;
 }
 
 base::string16 RenderText::GetTextFromRange(const Range& range) const {
   if (range.IsValid() && range.GetMin() < text().length())
     return text().substr(range.GetMin(), range.length());
   return base::string16();
 }
 
@@ skipping 632 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