ncurses.c

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/*****************************************************************************
 * ncurses.c : NCurses plugin for vlc
 *****************************************************************************
 * Copyright (C) 2001-2004 VideoLAN
 * $Id: ncurses.c,v 1.15 2004/02/22 15:57:41 fenrir Exp $
 *
 * Authors: Sam Hocevar <[e-mail]>
 *          Laurent Aimar <[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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <stdlib.h>                                      /* malloc(), free() */
#include <string.h>
#include <errno.h>                                                 /* ENOMEM */
#include <stdio.h>
#include <time.h>

#include <curses.h>

#include <vlc/vlc.h>
#include <vlc/intf.h>
#include <vlc/vout.h>

#ifdef HAVE_CDDAX
#define CDDA_MRL "cddax://"
#else
#define CDDA_MRL "cdda://"
#endif

#ifdef HAVE_VCDX
#define VCD_MRL "vcdx://"
#else
#define VCD_MRL "vcdx://"
#endif

/*****************************************************************************
 * Local prototypes.
 *****************************************************************************/
static int  Open           ( vlc_object_t * );
static void Close          ( vlc_object_t * );

static void Run            ( intf_thread_t * );
static void PlayPause      ( intf_thread_t * );
static void Eject          ( intf_thread_t * );

static int  HandleKey      ( intf_thread_t *, int );
static void Redraw           ( intf_thread_t *, time_t * );
static void ManageSlider   ( intf_thread_t * );

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
vlc_module_begin();
    set_description( _("ncurses interface") );
    set_capability( "interface", 10 );
    set_callbacks( Open, Close );
    add_shortcut( "curses" );
vlc_module_end();

/*****************************************************************************
 * intf_sys_t: description and status of ncurses interface
 *****************************************************************************/
enum
{
    BOX_NONE,
    BOX_HELP,
    BOX_INFO,
    BOX_LOG,
    BOX_PLAYLIST
};
struct intf_sys_t
{
    playlist_t     *p_playlist;
    input_thread_t *p_input;

    float           f_slider;
    float           f_slider_old;

    WINDOW          *w;

    int             i_box_type;
    int             i_box_y;
    int             i_box_lines;
    int             i_box_lines_total;
    int             i_box_start;

    int             i_box_plidx;    /* Playlist index */
    int             b_box_plidx_follow;

    int             b_box_cleared;

    msg_subscription_t* p_sub;                  /* message bank subscription */
};

static void DrawBox( WINDOW *win, int y, int x, int h, int w, char *title );
static void DrawLine( WINDOW *win, int y, int x, int w );
static void DrawEmptyLine( WINDOW *win, int y, int x, int w );

/*****************************************************************************
 * Open: initialize and create window
 *****************************************************************************/
static int Open( vlc_object_t *p_this )
{
    intf_thread_t *p_intf = (intf_thread_t *)p_this;
    intf_sys_t    *p_sys;
    vlc_value_t    val;

    /* Allocate instance and initialize some members */
    p_sys = p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
    p_sys->p_playlist = NULL;
    p_sys->p_input = NULL;
    p_sys->f_slider = 0.0;
    p_sys->f_slider_old = 0.0;
    p_sys->i_box_type = BOX_PLAYLIST;
    p_sys->i_box_lines = 0;
    p_sys->i_box_start= 0;
    p_sys->i_box_lines_total = 0;
    p_sys->b_box_plidx_follow = VLC_TRUE;
    p_sys->b_box_cleared = VLC_FALSE;
    p_sys->i_box_plidx = 0;
    p_sys->p_sub = msg_Subscribe( p_intf );

    /* Initialize the curses library */
    p_sys->w = initscr();
    keypad( p_sys->w, TRUE );
    /* Don't do NL -> CR/NL */
    nonl();
    /* Take input chars one at a time */
    cbreak();
    /* Don't echo */
    noecho();

    curs_set(0);
    timeout(0);

    clear();

    /* exported function */
    p_intf->pf_run = Run;

    /* Set quiet mode */
    val.i_int = -1;
    var_Set( p_intf->p_vlc, "verbose", val );

    return VLC_SUCCESS;
}

/*****************************************************************************
 * Close: destroy interface window
 *****************************************************************************/
static void Close( vlc_object_t *p_this )
{
    intf_thread_t *p_intf = (intf_thread_t *)p_this;
    intf_sys_t    *p_sys = p_intf->p_sys;

    if( p_sys->p_input )
    {
        vlc_object_release( p_sys->p_input );
    }
    if( p_sys->p_playlist )
    {
        vlc_object_release( p_sys->p_playlist );
    }

    /* Close the ncurses interface */
    endwin();

    msg_Unsubscribe( p_intf, p_sys->p_sub );

    /* Destroy structure */
    free( p_sys );
}

/*****************************************************************************
 * Run: ncurses thread
 *****************************************************************************/
static void Run( intf_thread_t *p_intf )
{
    intf_sys_t    *p_sys = p_intf->p_sys;

    int i_key;
    time_t t_last_refresh;

    /*
     * force drawing the interface for the first time
     */
    t_last_refresh = ( time( 0 ) - 1);

    while( !p_intf->b_die )
    {
        msleep( INTF_IDLE_SLEEP );

        /* Update the input */
        if( p_sys->p_playlist == NULL )
        {
            p_sys->p_playlist = vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
        }
        if( p_sys->p_playlist )
        {
            vlc_mutex_lock( &p_sys->p_playlist->object_lock );
            if( p_sys->p_input == NULL )
            {
                p_sys->p_input = p_sys->p_playlist->p_input;
                if( p_sys->p_input )
                {
                    if( !p_sys->p_input->b_dead )
                    {
                        vlc_object_yield( p_sys->p_input );
                    }
                }
            }
            else if( p_sys->p_input->b_dead )
            {
                vlc_object_release( p_sys->p_input );
                p_sys->p_input = NULL;
                p_sys->f_slider = p_sys->f_slider_old = 0.0;
                p_sys->b_box_cleared = VLC_FALSE;
            }
            vlc_mutex_unlock( &p_sys->p_playlist->object_lock );
        }

        if( p_sys->b_box_plidx_follow )
        {
            p_sys->i_box_plidx = p_sys->p_playlist->i_index;
        }


        while( ( i_key = getch()) != -1 )
        {
            /*
             * HandleKey returns 1 if the screen needs to be redrawn
             */
            if ( HandleKey( p_intf, i_key ) )
            {
                Redraw( p_intf, &t_last_refresh );
            }
        }
        /* Hack */
        if( p_sys->f_slider > 0.0001 && !p_sys->b_box_cleared )
        {
            clear();
            Redraw( p_intf, &t_last_refresh );
            p_sys->b_box_cleared = VLC_TRUE;
        }

        /*
         * redraw the screen every second
         */
        if ( (time(0) - t_last_refresh) >= 1 )
        {
            ManageSlider ( p_intf );
            Redraw( p_intf, &t_last_refresh );
        }
    }
}

/* following functions are local */

static int HandleKey( intf_thread_t *p_intf, int i_key )
{
    intf_sys_t *p_sys = p_intf->p_sys;
    vlc_value_t val;

    if( p_sys->i_box_type == BOX_PLAYLIST && p_sys->p_playlist )
    {
        int b_ret = VLC_TRUE;

        switch( i_key )
        {
            /* Playlist sort */
            case 'r':
                playlist_Sort( p_sys->p_playlist, SORT_RANDOM, ORDER_NORMAL );
                return 1;
            case 'o':
                playlist_Sort( p_sys->p_playlist, SORT_TITLE, ORDER_NORMAL );
                return 1;
            case 'O':
                playlist_Sort( p_sys->p_playlist, SORT_TITLE, ORDER_REVERSE );
                return 1;

            /* Playlist navigation */
            case KEY_HOME:
                p_sys->i_box_plidx = 0;
                break;
            case KEY_END:
                p_sys->i_box_plidx = p_sys->p_playlist->i_size - 1;
                break;
            case KEY_UP:
                p_sys->i_box_plidx--;
                break;
            case KEY_DOWN:
                p_sys->i_box_plidx++;
                break;
            case KEY_PPAGE:
                p_sys->i_box_plidx -= p_sys->i_box_lines;
                break;
            case KEY_NPAGE:
                p_sys->i_box_plidx += p_sys->i_box_lines;
                break;
            case KEY_BACKSPACE:
            case KEY_DC:
            {
                int i_item = p_sys->p_playlist->i_index;

                playlist_Delete( p_sys->p_playlist, p_sys->i_box_plidx );
                if( i_item < p_sys->p_playlist->i_size && i_item != p_sys->p_playlist->i_index )
                {
                    playlist_Goto( p_sys->p_playlist, i_item );
                }
                break;
            }

            case KEY_ENTER:
            case 0x0d:
                playlist_Goto( p_sys->p_playlist, p_sys->i_box_plidx );
                break;
            default:
                b_ret = VLC_FALSE;
                break;
        }

        if( b_ret )
        {
            if( p_sys->i_box_plidx >= p_sys->p_playlist->i_size ) p_sys->i_box_plidx = p_sys->p_playlist->i_size - 1;
            if( p_sys->i_box_plidx < 0 ) p_sys->i_box_plidx = 0;
            if( p_sys->i_box_plidx == p_sys->p_playlist->i_index )
                p_sys->b_box_plidx_follow = VLC_TRUE;
            else
                p_sys->b_box_plidx_follow = VLC_FALSE;
            return 1;
        }
    }
    else if( p_sys->i_box_type == BOX_HELP || p_sys->i_box_type == BOX_INFO )
    {
        switch( i_key )
        {
            case KEY_HOME:
                p_sys->i_box_start = 0;
                return 1;
            case KEY_END:
                p_sys->i_box_start = p_sys->i_box_lines_total - 1;
                return 1;
            case KEY_UP:
                if( p_sys->i_box_start > 0 ) p_sys->i_box_start--;
                return 1;
            case KEY_DOWN:
                if( p_sys->i_box_start < p_sys->i_box_lines_total - 1 )
                {
                    p_sys->i_box_start++;
                }
                return 1;
            case KEY_PPAGE:
                p_sys->i_box_start -= p_sys->i_box_lines;
                if( p_sys->i_box_start < 0 ) p_sys->i_box_start = 0;
                return 1;
            case KEY_NPAGE:
                p_sys->i_box_start += p_sys->i_box_lines;
                if( p_sys->i_box_start >= p_sys->i_box_lines_total )
                {
                    p_sys->i_box_start = p_sys->i_box_lines_total - 1;
                }
                return 1;
            default:
                break;
        }
    }
    else if( p_sys->i_box_type == BOX_NONE )
    {
        switch( i_key )
        {