nsmclient.h

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/*******************************************************************************/
/* Copyright (C) 2012 Jonathan Moore Liles                                     */
/*                                                                             */
/* 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; see the file COPYING.  If not,write to the Free Software */
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
/*******************************************************************************/

#pragma once

#include <lo/lo.h>

namespace NSM
{

    class Client
    {

    private:

        const char *nsm_url;

        lo_server _server;
        lo_server_thread _st;
        lo_address nsm_addr;

        bool nsm_is_active;
        char *_nsm_client_id;
        char *_session_manager_name;
        char *_nsm_client_path;

    public:

        enum
        {
            ERR_OK = 0,
            ERR_GENERAL    = -1,
            ERR_INCOMPATIBLE_API = -2,
            ERR_BLACKLISTED      = -3,
            ERR_LAUNCH_FAILED    = -4,
            ERR_NO_SUCH_FILE     = -5,
            ERR_NO_SESSION_OPEN  = -6,
            ERR_UNSAVED_CHANGES  = -7,
            ERR_NOT_NOW          = -8
        };

        Client ( );
        virtual ~Client ( );

        bool is_active ( void ) { return nsm_is_active; }

        const char *session_manager_name ( void ) { return _session_manager_name; }
        const char *client_id ( void ) { return _nsm_client_id; }
        const char *client_path ( void ) { return _nsm_client_path; }

        /* Client->Server methods */
        void is_dirty ( void );
        void is_clean ( void );
        void progress ( float f );
        void message( int priority, const char *msg );
        void announce ( const char *appliction_name, const char *capabilities, const char *process_name );

        void broadcast ( lo_message msg );

        /* init without threading */
        int init ( const char *nsm_url );
        /* init with threading */
        int init_thread ( const char *nsm_url );
        
        /* call this periodically to check for new messages */
        void check ( int timeout = 0 );

        /* or call these to start and stop a thread (must do your own locking in handler!) */
        void start ( void );
        void stop ( void );

    protected:

        /* Server->Client methods */
        virtual int command_open ( const char *name, const char *display_name, const char *client_id, char **out_msg ) = 0;
        virtual int command_save ( char **out_msg ) = 0;

        virtual void command_active ( bool ) { }

        virtual void command_session_is_loaded ( void ) { }

        /* invoked when an unrecognized message is received. Should return 0 if you handled it, -1 otherwise. */
        virtual int command_broadcast ( const char *, lo_message ) { return -1; }

    private:

        /* osc handlers */
        static int osc_open ( const char *path, const char *types, lo_arg **argv, int argc, lo_message msg, void *user_data );
        static int osc_save ( const char *path, const char *types, lo_arg **argv, int argc, lo_message msg, void *user_data );
        static int osc_announce_reply ( const char *path, const char *types, lo_arg **argv, int argc, lo_message msg, void *user_data );
        static int osc_error ( const char *path, const char *types, lo_arg **argv, int argc, lo_message msg, void *user_data );
        static int osc_session_is_loaded ( const char *path, const char *types, lo_arg **argv, int argc, lo_message msg, void *user_data );
        static int osc_broadcast ( const char *path, const char *types, lo_arg **argv, int argc, lo_message msg, void *user_data );

    };
};