It is time.

ui/views/controls/textfield/textfield_controller.h

-// 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.
-
-#ifndef UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_CONTROLLER_H_
-#define UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_CONTROLLER_H_
-
-#include <set>
-
-#include "base/strings/string16.h"
-#include "ui/base/dragdrop/os_exchange_data.h"
-#include "ui/views/views_export.h"
-
-namespace ui {
-class KeyEvent;
-class MouseEvent;
-class SimpleMenuModel;
-}  // namespace ui
-
-namespace views {
-
-class Textfield;
-
-// This defines the callback interface for other code to be notified of changes
-// in the state of a text field.
-class VIEWS_EXPORT TextfieldController {
- public:
-  // This method is called whenever the text in the field is changed by the
-  // user. It won't be called if the text is changed by calling
-  // Textfield::SetText() or Textfield::AppendText().
-  virtual void ContentsChanged(Textfield* sender,
-                               const base::string16& new_contents) {}
-
-  // This method is called to get notified about keystrokes in the edit.
-  // Returns true if the message was handled and should not be processed
-  // further. If it returns false the processing continues.
-  virtual bool HandleKeyEvent(Textfield* sender,
-                              const ui::KeyEvent& key_event);
-
-  // This method is called to get notified about mouse events in the edit.
-  // Returns true if the message was handled and should not be processed
-  // further. Currently, only mouse down events are sent here.
-  virtual bool HandleMouseEvent(Textfield* sender,
-                                const ui::MouseEvent& mouse_event);
-
-  // Called before performing a user action that may change the textfield.
-  // It's currently only supported by Views implementation.
-  virtual void OnBeforeUserAction(Textfield* sender) {}
-
-  // Called after performing a user action that may change the textfield.
-  // It's currently only supported by Views implementation.
-  virtual void OnAfterUserAction(Textfield* sender) {}
-
-  // Called after performing a Cut or Copy operation.
-  virtual void OnAfterCutOrCopy(ui::ClipboardType clipboard_type) {}
-
-  // Called after performing a Paste operation.
-  virtual void OnAfterPaste() {}
-
-  // Called after the textfield has written drag data to give the controller a
-  // chance to modify the drag data.
-  virtual void OnWriteDragData(ui::OSExchangeData* data) {}
-
-  // Called after the textfield has set default drag operations to give the
-  // controller a chance to update them.
-  virtual void OnGetDragOperationsForTextfield(int* drag_operations) {}
-
-  // Enables the controller to append to the accepted drop formats.
-  virtual void AppendDropFormats(
-      int* formats,
-      std::set<ui::OSExchangeData::CustomFormat>* custom_formats) {}
-
-  // Called when a drop of dragged data happens on the textfield. This method is
-  // called before regular handling of the drop. If this returns a drag
-  // operation other than |ui::DragDropTypes::DRAG_NONE|, regular handling is
-  // skipped.
-  virtual int OnDrop(const ui::OSExchangeData& data);
-
-  // Gives the controller a chance to modify the context menu contents.
-  virtual void UpdateContextMenu(ui::SimpleMenuModel* menu_contents) {}
-
- protected:
-  virtual ~TextfieldController() {}
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_CONTROLLER_H_