Reland: Implement Aura side of unified touch text selection for contents

ui/views/touchui/touch_editing_menu.cc

 // Copyright (c) 2013 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/views/touchui/touch_editing_menu.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/canvas.h"
@@ skipping 40 matching lines @@
 
   SetLayoutManager(new BoxLayout(BoxLayout::kHorizontal, 0, 0,
       kSpacingBetweenButtons));
   CreateButtons();
 
   // After buttons are created, check if there is enough room between handles to
   // show the menu and adjust anchor rect properly if needed, just in case the
   // menu is needed to be shown under the selection.
   gfx::Rect adjusted_anchor_rect(anchor_rect);
   int menu_width = GetPreferredSize().width();
+  // TODO(mfomitchev): This assumes that the handles are center-aligned to the
+  // achor_rect edges, which is not true. We should fix this, perhaps by passing
+  // down the cumulative width occupied by the handles within anchor_rect plus
+  // the handle image height instead of |handle_image_size|. Perhaps we should
+  // also allow for some minimum padding.
   if (menu_width > anchor_rect.width() - handle_image_size.width())
     adjusted_anchor_rect.Inset(0, 0, 0, -handle_image_size.height());
   SetAnchorRect(adjusted_anchor_rect);
 
   views::BubbleDelegateView::CreateBubble(this);
   GetWidget()->Show();
 }
 
 TouchEditingMenuView::~TouchEditingMenuView() {
 }
@@ skipping 77 matching lines @@
   const gfx::FontList& font_list =
       ui::ResourceBundle::GetSharedInstance().GetFontList(
           ui::ResourceBundle::SmallFont);
   button->SetFontList(font_list);
   button->SetHorizontalAlignment(gfx::ALIGN_CENTER);
   button->set_tag(tag);
   return button;
 }
 
 }  // namespace views