Implement clipboard features in views textfield.

views/controls/textfield/textfield_views_model.h

 // Copyright (c) 2010 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 VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_VIEWS_MODEL_H_
 #define VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_VIEWS_MODEL_H_
 #pragma once
 
 #include <vector>
 
+#include "app/keyboard_codes.h"
 #include "base/string16.h"
 #include "gfx/rect.h"
 #include "third_party/skia/include/core/SkColor.h"
 
 namespace gfx {
 class Font;
 }  // namespace gfx
 
 namespace views {
 
@@ skipping 98 matching lines @@
 
   // Clears selection.
   void ClearSelection();
 
   // Returns visible text. If the field is password, it returns the
   // sequence of "*".
   string16 GetVisibleText() const {
     return GetVisibleText(0U, text_.length());
   }
 
+  // Handles key event for Cut/Copy/Paste key presses. Returns true if text
+  // has changed after handling the event (in case of cut and paste events).
+  bool HandleClipboardEvents(app::KeyboardCode key_code);
+
  private:
   friend class NativeTextfieldViews;
 
   // Tells if any text is selected.
   bool HasSelection() const;
 
   // Deletes the selected text.
   void DeleteSelection();
 
   // Returns the visible text given |start| and |end|.
@@ skipping 10 matching lines @@
 
   // True if the text is the password.
   bool is_password_;
 
   DISALLOW_COPY_AND_ASSIGN(TextfieldViewsModel);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_VIEWS_MODEL_H_