ncurses.c

uclinux 下的vlc播放器源代码

/*****************************************************************************
 * ncurses.c : NCurses plugin for vlc
 *****************************************************************************
 * Copyright (C) 2001-2006 the VideoLAN team
 * $Id: ncurses.c 18329 2006-12-08 18:07:54Z hartman $
 *
 * Authors: Sam Hocevar <[e-mail]>
 *          Laurent Aimar <[e-mail]>
 *          Yoann Peronneau <[e-mail]>
 *          Derk-Jan Hartman <hartman at videolan dot org>
 *
 * 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.
 *****************************************************************************/

/*****************************************************************************
 * 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>
#include <vlc/aout.h>
#include "charset.h"

#ifdef HAVE_SYS_STAT_H
#   include <sys/stat.h>
#endif
#if (!defined( WIN32 ) || defined(__MINGW32__))
/* Mingw has its own version of dirent */
#   include <dirent.h>
#endif

#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

#define SEARCH_CHAIN_SIZE 20
#define OPEN_CHAIN_SIZE 50

/*****************************************************************************
 * 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 PlaylistRebuild( intf_thread_t * );
static void PlaylistAddNode( intf_thread_t *, playlist_item_t *, int, char *);
static void PlaylistDestroy( intf_thread_t * );
static int  PlaylistChanged( vlc_object_t *, const char *, vlc_value_t,
                             vlc_value_t, void * );
static void FindIndex      ( intf_thread_t * );
static void SearchPlaylist ( intf_thread_t *, char * );
static int  SubSearchPlaylist( intf_thread_t *, char *, int, int );
static void ManageSlider   ( intf_thread_t * );
static void ReadDir        ( intf_thread_t * );

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/

#define BROWSE_TEXT N_("Filebrowser starting point")
#define BROWSE_LONGTEXT N_( \
    "This option allows you to specify the directory the ncurses filebrowser " \
    "will show you initially.")

vlc_module_begin();
    set_shortname( "Ncurses" );
    set_description( _("Ncurses interface") );
    set_capability( "interface", 10 );
    set_category( CAT_INTERFACE );
    set_subcategory( SUBCAT_INTERFACE_MAIN );
    set_callbacks( Open, Close );
    add_shortcut( "curses" );
    add_directory( "browse-dir", NULL, NULL, BROWSE_TEXT, BROWSE_LONGTEXT, VLC_FALSE );
vlc_module_end();

/*****************************************************************************
 * intf_sys_t: description and status of ncurses interface
 *****************************************************************************/
enum
{
    BOX_NONE,
    BOX_HELP,
    BOX_INFO,
    BOX_LOG,
    BOX_PLAYLIST,
    BOX_SEARCH,
    BOX_OPEN,
    BOX_BROWSE
};
struct dir_entry_t
{
    vlc_bool_t  b_file;
    char        *psz_path;
};
struct pl_item_t
{
    playlist_item_t *p_item;
    char            *psz_display;
};
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;
    playlist_item_t *p_plnode;      /* Playlist node */
    int             i_box_bidx;     /* browser index */

    int             b_box_cleared;

    msg_subscription_t* p_sub;                  /* message bank subscription */

    char            *psz_search_chain;          /* for playlist searching    */
    char            *psz_old_search;            /* for searching next        */
    int             i_before_search;

    char            *psz_open_chain;
    char             psz_partial_keys[7];

    char            *psz_current_dir;
    int             i_dir_entries;
    struct dir_entry_t  **pp_dir_entries;
    vlc_bool_t      b_show_hidden_files;

    int             i_current_view;             /* playlist view             */
    struct pl_item_t    **pp_plist;
    int             i_plist_entries;
    vlc_bool_t      b_need_update;              /* for playlist view */
};

static void DrawBox( WINDOW *win, int y, int x, int h, int w, const 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_plnode = NULL;
    p_sys->i_box_bidx = 0;
    p_sys->p_sub = msg_Subscribe( p_intf, MSG_QUEUE_NORMAL );
    memset( p_sys->psz_partial_keys, 0, sizeof( p_sys->psz_partial_keys ) );

    /* 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 );

    /* Set defaul playlist view */
    p_sys->i_current_view = VIEW_CATEGORY;
    p_sys->pp_plist = NULL;
    p_sys->i_plist_entries = 0;
    p_sys->b_need_update = VLC_FALSE;

    /* Initialize search chain */
    p_sys->psz_search_chain = (char *)malloc( SEARCH_CHAIN_SIZE + 1 );
    p_sys->psz_old_search = NULL;
    p_sys->i_before_search = 0;

    /* Initialize open chain */
    p_sys->psz_open_chain = (char *)malloc( OPEN_CHAIN_SIZE + 1 );

    /* Initialize browser options */
    var_Create( p_intf, "browse-dir", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
    var_Get( p_intf, "browse-dir", &val);

    if( val.psz_string && *val.psz_string )
    {
        p_sys->psz_current_dir = strdup( val.psz_string );
        free( val.psz_string );
    }
    else
    {
        p_sys->psz_current_dir = strdup( p_intf->p_vlc->psz_homedir );
    }

    p_sys->i_dir_entries = 0;
    p_sys->pp_dir_entries = NULL;
    p_sys->b_show_hidden_files = VLC_FALSE;
    ReadDir( p_intf );

    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;
    int i;

    var_DelCallback( p_sys->p_playlist, "intf-change", PlaylistChanged,
                     p_intf );
    var_DelCallback( p_sys->p_playlist, "item-append", PlaylistChanged,
                     p_intf );

    PlaylistDestroy( p_intf );

    for( i = 0; i < p_sys->i_dir_entries; i++ )
    {
        struct dir_entry_t *p_dir_entry = p_sys->pp_dir_entries[i];
        if( p_dir_entry->psz_path ) free( p_dir_entry->psz_path );
        REMOVE_ELEM( p_sys->pp_dir_entries, p_sys->i_dir_entries, i );
        if( p_dir_entry ) free( p_dir_entry );
    }
    p_sys->pp_dir_entries = NULL;

    if( p_sys->psz_current_dir ) free( p_sys->psz_current_dir );
    if( p_sys->psz_search_chain ) free( p_sys->psz_search_chain );
    if( p_sys->psz_old_search ) free( p_sys->psz_old_search );
    if( p_sys->psz_open_chain ) free( p_sys->psz_open_chain );

    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 )
            {
                var_AddCallback( p_sys->p_playlist, "intf-change",
                                 PlaylistChanged, p_intf );
                var_AddCallback( p_sys->p_playlist, "item-append",
                                 PlaylistChanged, p_intf );
            }
        }
        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->p_playlist->i_index >= 0 )
        {
            FindIndex( p_intf );
        }

        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 char *KeyToUTF8( int i_key, char *psz_part )
{
    char *psz_utf8, *psz;
    int len = strlen( psz_part );
    if( len == 6 )
    {
        /* overflow error - should not happen */
        memset( psz_part, 0, 6 );
        return NULL;
    }

    psz_part[len] = (char)i_key;

    psz_utf8 = FromLocaleDup( psz_part );