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      1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_UI_VIEWS_WRENCH_MENU_H_
      6 #define CHROME_BROWSER_UI_VIEWS_WRENCH_MENU_H_
      7 #pragma once
      8 
      9 #include <map>
     10 #include <utility>
     11 
     12 #include "base/memory/ref_counted.h"
     13 #include "base/memory/scoped_ptr.h"
     14 #include "ui/base/models/menu_model.h"
     15 #include "views/controls/menu/menu_delegate.h"
     16 
     17 class Browser;
     18 
     19 namespace views {
     20 class MenuButton;
     21 class MenuItemView;
     22 class View;
     23 }  // namespace views
     24 
     25 // WrenchMenu adapts the WrenchMenuModel to view's menu related classes.
     26 class WrenchMenu : public base::RefCounted<WrenchMenu>,
     27                    public views::MenuDelegate {
     28  public:
     29   explicit WrenchMenu(Browser* browser);
     30 
     31   void Init(ui::MenuModel* model);
     32 
     33   // Shows the menu relative to the specified view.
     34   void RunMenu(views::MenuButton* host);
     35 
     36   // MenuDelegate overrides:
     37   virtual bool IsItemChecked(int id) const;
     38   virtual bool IsCommandEnabled(int id) const;
     39   virtual void ExecuteCommand(int id);
     40   virtual bool GetAccelerator(int id, views::Accelerator* accelerator);
     41 
     42  private:
     43   friend class base::RefCounted<WrenchMenu>;
     44 
     45   class CutCopyPasteView;
     46   class ZoomView;
     47 
     48   typedef std::pair<ui::MenuModel*,int> Entry;
     49   typedef std::map<int,Entry> IDToEntry;
     50 
     51   ~WrenchMenu();
     52 
     53   // Populates |parent| with all the child menus in |model|. Recursively invokes
     54   // |PopulateMenu| for any submenu. |next_id| is incremented for every menu
     55   // that is created.
     56   void PopulateMenu(views::MenuItemView* parent,
     57                     ui::MenuModel* model,
     58                     int* next_id);
     59 
     60   // Adds a new menu to |parent| to represent the MenuModel/index pair passed
     61   // in.
     62   views::MenuItemView* AppendMenuItem(views::MenuItemView* parent,
     63                                       ui::MenuModel* model,
     64                                       int index,
     65                                       ui::MenuModel::ItemType menu_type,
     66                                       int* next_id);
     67 
     68   // Invoked from the cut/copy/paste menus. Cancels the current active menu and
     69   // activates the menu item in |model| at |index|.
     70   void CancelAndEvaluate(ui::MenuModel* model, int index);
     71 
     72   // The views menu.
     73   scoped_ptr<views::MenuItemView> root_;
     74 
     75   // Maps from the ID as understood by MenuItemView to the model/index pair the
     76   // item came from.
     77   IDToEntry id_to_entry_;
     78 
     79   // Browser the menu is being shown for.
     80   Browser* browser_;
     81 
     82   // |CancelAndEvaluate| sets |selected_menu_model_| and |selected_index_|.
     83   // If |selected_menu_model_| is non-null after the menu completes
     84   // ActivatedAt is invoked. This is done so that ActivatedAt isn't invoked
     85   // while the message loop is nested.
     86   ui::MenuModel* selected_menu_model_;
     87   int selected_index_;
     88 
     89   DISALLOW_COPY_AND_ASSIGN(WrenchMenu);
     90 };
     91 
     92 #endif  // CHROME_BROWSER_UI_VIEWS_WRENCH_MENU_H_
     93