Implement touch selection menu.

views/touchui/touch_selection_controller_impl.h

 // Copyright (c) 2011 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_TOUCHUI_TOUCH_SELECTION_CONTROLLER_IMPL_H_
 #define VIEWS_TOUCHUI_TOUCH_SELECTION_CONTROLLER_IMPL_H_
 #pragma once
 
+#include "base/timer.h"
 #include "ui/gfx/point.h"
 #include "views/touchui/touch_selection_controller.h"
 #include "views/view.h"
 
 namespace views {
 
 // Touch specific implementation of TouchSelectionController. Responsible for
 // displaying selection handles and menu elements relevant in a touch interface.
 class TouchSelectionControllerImpl : public TouchSelectionController {
  public:
   // Use TextSelectionController::create().
   explicit TouchSelectionControllerImpl(TouchSelectionClientView* client_view);
 
   virtual ~TouchSelectionControllerImpl();
 
   // TextSelectionController.
   virtual void SelectionChanged(const gfx::Point& p1,
                                 const gfx::Point& p2) OVERRIDE;
 
   virtual void ClientViewLostFocus() OVERRIDE;
 
  private:
   friend class TouchSelectionControllerImplTest;
   class SelectionHandleView;
+  class TouchContextMenuView;
 
   // Callback to inform the client view that the selection handle has been
   // dragged, hence selection may need to be updated.
   void SelectionHandleDragged(const gfx::Point& drag_pos);
 
   // Convenience method to convert a point from a selection handle's coordinate
   // system to that of the client view.
   void ConvertPointToClientView(SelectionHandleView* source, gfx::Point* point);
 
+  // Checks if the client view supports a context menu command.
+  bool IsCommandIdEnabled(int command_id) const;
+
+  // Sends a context menu command to the client view.
+  void ExecuteCommand(int command_id);
+
+  // Time to show context menu.
+  void ContextMenuTimerFired();
+
+  // Convenience method to update the position/visibility of the context menu.
+  void UpdateContextMenu(const gfx::Point& p1, const gfx::Point& p2);
+
+  // Convenience method for hiding context menu.
+  void HideContextMenu();
+
   // Convenience methods for testing.
   gfx::Point GetSelectionHandle1Position();
   gfx::Point GetSelectionHandle2Position();
   bool IsSelectionHandle1Visible();
   bool IsSelectionHandle2Visible();
 
   TouchSelectionClientView* client_view_;
   scoped_ptr<SelectionHandleView> selection_handle_1_;
   scoped_ptr<SelectionHandleView> selection_handle_2_;
+  scoped_ptr<TouchContextMenuView> context_menu_;
+
+  // Timer to trigger |context_menu| (|context_menu| is not shown if the
+  // selection handles are being updated. It appears only when the handles are
+  // stationary for a certain amount of time).
+  base::OneShotTimer<TouchSelectionControllerImpl> context_menu_timer_;
 
   // Pointer to the SelectionHandleView being dragged during a drag session.
   SelectionHandleView* dragging_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchSelectionControllerImpl);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_TOUCHUI_TOUCH_SELECTION_CONTROLLER_IMPL_H_