cmd_generic.hpp

uclinux 下的vlc播放器源代码

/*****************************************************************************
 * cmd_generic.hpp
 *****************************************************************************
 * Copyright (C) 2003 the VideoLAN team
 * $Id: cmd_generic.hpp 14187 2006-02-07 16:37:40Z courmisch $
 *
 * Authors: Cyril Deguet     <[e-mail]>
 *          Olivier Teulière <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

#ifndef CMD_GENERIC_HPP
#define CMD_GENERIC_HPP

#include "../src/skin_common.hpp"
#include "../utils/pointer.hpp"

#include <string>


/// Macro to define the prototype of simple commands
#define DEFINE_COMMAND( name, type ) \
class Cmd##name: public CmdGeneric \
{ \
    public: \
        Cmd##name( intf_thread_t *pIntf ): CmdGeneric( pIntf ) {} \
        virtual ~Cmd##name() {} \
        virtual void execute(); \
        virtual string getType() const { return type; } \
\
};


/// Macro to define a "callback" command inside a class
#define DEFINE_CALLBACK( parent, action ) \
class Cmd##action: public CmdGeneric \
{ \
    public: \
        Cmd##action( parent *pParent ): \
            CmdGeneric( pParent->getIntf() ), m_pParent( pParent ) {} \
        virtual ~Cmd##action() {} \
        virtual void execute(); \
        virtual string getType() const { return "Cmd" #parent #action; } \
    private: \
        parent *m_pParent; \
\
} m_cmd##action; \
friend class Cmd##action;


/// Base class for skins commands
class CmdGeneric: public SkinObject
{
    public:
        virtual ~CmdGeneric() {}

        /// This method does the real job of the command
        virtual void execute() = 0;

        /// Return the type of the command
        virtual string getType() const { return ""; }

        /// During queue reductions, check if we really want to remove
        /// this command.
        virtual bool checkRemove( CmdGeneric * ) const { return true; }

    protected:
        CmdGeneric( intf_thread_t *pIntf ): SkinObject( pIntf ) {}
};


typedef CountedPtr<CmdGeneric> CmdGenericPtr;


#endif