osd_parser.c

uclinux 下的vlc播放器源代码

        path[MAX_FILE_PATH-1] = '\0';
        i_len = strlen(&path[0]);
        if( i_len == MAX_FILE_PATH )
            i_len--; /* truncate to prevent buffer overflow */
#if defined(WIN32) || defined(UNDER_CE)
        if( (i_len > 0) && path[i_len] != '\\' )
            path[i_len] = '\\';
#else
        if( (i_len > 0) && path[i_len] != '/' )
            path[i_len] = '/';
#endif
        path[i_len+1] = '\0';
        if( result == 0 || result == EOF )
            goto error;
        msg_Dbg( p_this, "%s=%s", &action[0], &path[0] );

        if( i_len == 0 )
            *p_menu = osd_MenuNew( *p_menu, NULL, 0, 0 );
        else
            *p_menu = osd_MenuNew( *p_menu, &path[0], 0, 0 );
    }

    if( !*p_menu )
        goto error;

    /* read successive lines */
    while( !feof( fd ) )
    {
        osd_state_t   *p_state_current = NULL; /* button state currently processed */
        osd_state_t   *p_state_prev = NULL;    /* previous state processed button */

        char cmd[25] = "";
        char action[25] = "";
        char state[25]  = "";
        char file[256]  = "";
        char path[512]  = "";
        int  i_x = 0;
        int  i_y = 0;

        result = fscanf( fd, "%24s %24s (%d,%d)", &cmd[0], &action[0], &i_x, &i_y );
        if( result == 0 )
            goto error;
        if( strncmp( &cmd[0], "action", 6 ) != 0 )
            break;
        msg_Dbg( p_this, " + %s hotkey=%s (%d,%d)", &cmd[0], &action[0], i_x, i_y );

        p_prev = p_current;
        p_current = osd_ButtonNew( &action[0], i_x, i_y );
        if( !p_current )
            goto error;

        if( p_prev )
            p_prev->p_next = p_current;
        else
            (*p_menu)->p_button = p_current;
        p_current->p_prev = p_prev;

        /* parse all states */
        while( !feof( fd ) )
        {
            char type[25] = "";

            result = fscanf( fd, "\t%24s", &state[0] );
            if( result == 0 )
                goto error;

            /* FIXME: We only parse one level deep now */
            if( strncmp( &state[0], "action", 6 ) == 0 )
            {
                osd_button_t   *p_up = NULL;

                result = fscanf( fd, "%24s (%d,%d)", &action[0], &i_x, &i_y );
                if( result == 0 )
                    goto error;
                /* create new button */
                p_up = osd_ButtonNew( &action[0], i_x, i_y );
                if( !p_up )
                    goto error;
                /* Link to list */
                p_up->p_down = p_current;
                p_current->p_up = p_up;
                msg_Dbg( p_this, " + (menu up) hotkey=%s (%d,%d)", &action[0], i_x, i_y );
                /* Parse type state */
                result = fscanf( fd, "\t%24s %24s", &cmd[0], &type[0] );
                if( result == 0 )
                    goto error;
                if( strncmp( &cmd[0], "type", 4 ) == 0 )
                {
                    if( strncmp( &type[0], "volume", 6 ) == 0 )
                    {
                        (*p_menu)->p_state->p_volume = p_up;
                        msg_Dbg( p_this, " + type=%s", &type[0] );
                    }
                }
                /* Parse range state */
                result = fscanf( fd, "\t%24s", &state[0] );
                if( result == 0 )
                    goto error;
                /* Parse the range state */
                if( strncmp( &state[0], "range", 5 ) == 0 )
                {
                    osd_state_t   *p_range_current = NULL; /* range state currently processed */
                    osd_state_t   *p_range_prev = NULL;    /* previous state processed range */
                    int i_index = 0;

                    p_up->b_range = VLC_TRUE;

                    result = fscanf( fd, "\t%24s", &action[0] );
                    if( result == 0 )
                        goto error;

                    result = fscanf( fd, "\t%d", &i_index );
                    if( result == 0 )
                        goto error;

                    msg_Dbg( p_this, " + (menu up) hotkey down %s, file=%s%s", &action[0], (*p_menu)->psz_path, &file[0] );

                    if( p_up->psz_action_down ) free( p_up->psz_action_down );
                    p_up->psz_action_down = strdup( &action[0] );

                    /* Parse range contstruction :
                     * range <hotkey>
                     *      <state1> <file1>
                     *
                     *      <stateN> <fileN>
                     * end
                     */
                    while( !feof( fd ) )
                    {
                        result = fscanf( fd, "\t%255s", &file[0] );
                        if( result == 0 )
                            goto error;
                        if( strncmp( &file[0], "end", 3 ) == 0 )
                            break;

                        p_range_prev = p_range_current;

                        if( (*p_menu)->psz_path )
                        {
                            size_t i_path_size = strlen( (*p_menu)->psz_path );
                            size_t i_file_size = strlen( &file[0] );

                            strncpy( &path[0], (*p_menu)->psz_path, i_path_size );
                            strncpy( &path[i_path_size], &file[0], 512 - (i_path_size + i_file_size) );
                            path[ i_path_size + i_file_size ] = '\0';

                            p_range_current = osd_StateNew( p_this, &path[0], "pressed" );
                        }
                        else /* absolute paths are used. */
                            p_range_current = osd_StateNew( p_this, &file[0], "pressed" );

                        if( !p_range_current || !p_range_current->p_pic )
                            goto error;

                        /* increment the number of ranges for this button */
                        p_up->i_ranges++;

                        if( p_range_prev )
                            p_range_prev->p_next = p_range_current;
                        else
                            p_up->p_states = p_range_current;
                        p_range_current->p_prev = p_range_prev;

                        msg_Dbg( p_this, "  |- range=%d, file=%s%s",
                                p_up->i_ranges,
                                (*p_menu)->psz_path, &file[0] );
                    }
                    if( i_index > 0 )
                    {
                        osd_state_t *p_range = NULL;

                        /* Find the default index for state range */
                        p_range = p_up->p_states;
                        while( (--i_index > 0) && p_range->p_next )
                        {
                            osd_state_t *p_temp = NULL;
                            p_temp = p_range->p_next;
                            p_range = p_temp;
                        }
                        p_up->p_current_state = p_range;
                    }
                    else p_up->p_current_state = p_up->p_states;

                }
                result = fscanf( fd, "\t%24s", &state[0] );
                if( result == 0 )
                    goto error;
                if( strncmp( &state[0], "end", 3 ) != 0 )
                    goto error;

                /* Continue at the beginning of the while() */
                continue;
            }

            /* Parse the range state */
            if( strncmp( &state[0], "range", 5 ) == 0 )
            {
                osd_state_t   *p_range_current = NULL; /* range state currently processed */
                osd_state_t   *p_range_prev = NULL;    /* previous state processed range */
                int i_index = 0;

                p_current->b_range = VLC_TRUE;

                result = fscanf( fd, "\t%24s", &action[0] );
                if( result == 0 )
                    goto error;

                result = fscanf( fd, "\t%d", &i_index );
                if( result == 0 )
                    goto error;

                msg_Dbg( p_this, " + hotkey down %s, file=%s%s", &action[0], (*p_menu)->psz_path, &file[0] );
                if( p_current->psz_action_down ) free( p_current->psz_action_down );
                p_current->psz_action_down = strdup( &action[0] );

                /* Parse range contstruction :
                 * range <hotkey>
                 *      <state1> <file1>
                 *
                 *      <stateN> <fileN>
                 * end
                 */
                while( !feof( fd ) )
                {
                    result = fscanf( fd, "\t%255s", &file[0] );
                    if( result == 0 )
                        goto error;
                    if( strncmp( &file[0], "end", 3 ) == 0 )
                        break;

                    p_range_prev = p_range_current;

                    if( (*p_menu)->psz_path )
                    {
                        size_t i_path_size = strlen( (*p_menu)->psz_path );
                        size_t i_file_size = strlen( &file[0] );

                        strncpy( &path[0], (*p_menu)->psz_path, i_path_size );
                        strncpy( &path[i_path_size], &file[0], 512 - (i_path_size + i_file_size) );
                        path[ i_path_size + i_file_size ] = '\0';

                        p_range_current = osd_StateNew( p_this, &path[0], "pressed" );
                    }
                    else /* absolute paths are used. */
                        p_range_current = osd_StateNew( p_this, &file[0], "pressed" );

                    if( !p_range_current || !p_range_current->p_pic )
                        goto error;

                    /* increment the number of ranges for this button */
                    p_current->i_ranges++;

                    if( p_range_prev )
                        p_range_prev->p_next = p_range_current;
                    else
                        p_current->p_states = p_range_current;
                    p_range_current->p_prev = p_range_prev;

                    msg_Dbg( p_this, "  |- range=%d, file=%s%s",
                            p_current->i_ranges,
                            (*p_menu)->psz_path, &file[0] );
                }
                if( i_index > 0 )
                {
                    osd_state_t *p_range = NULL;

                    /* Find the default index for state range */
                    p_range = p_current->p_states;
                    while( (--i_index > 0) && p_range->p_next )
                    {
                        osd_state_t *p_temp = NULL;
                        p_temp = p_range->p_next;
                        p_range = p_temp;
                    }
                    p_current->p_current_state = p_range;
                }
                else p_current->p_current_state = p_current->p_states;
                /* Continue at the beginning of the while() */
                continue;
            }
            if( strncmp( &state[0], "end", 3 ) == 0 )
                break;

            result = fscanf( fd, "\t%255s", &file[0] );
            if( result == 0 )
                goto error;

            p_state_prev = p_state_current;

            if( ( strncmp( ppsz_button_states[0], &state[0], strlen(ppsz_button_states[0]) ) != 0 ) &&
                ( strncmp( ppsz_button_states[1], &state[0], strlen(ppsz_button_states[1]) ) != 0 ) &&
                ( strncmp( ppsz_button_states[2], &state[0], strlen(ppsz_button_states[2]) ) != 0 ) )
            {
                msg_Err( p_this, "invalid button state %s for button %s expected %d: unselect, select or pressed)",
                                    &state[0], &action[0], strlen(&state[0]));
                goto error;
            }

            if( (*p_menu)->psz_path )
            {
                size_t i_path_size = strlen( (*p_menu)->psz_path );
                size_t i_file_size = strlen( &file[0] );

                strncpy( &path[0], (*p_menu)->psz_path, i_path_size );
                strncpy( &path[i_path_size], &file[0], 512 - (i_path_size + i_file_size) );
                path[ i_path_size + i_file_size ] = '\0';

                p_state_current = osd_StateNew( p_this, &path[0], &state[0] );
            }
            else /* absolute paths are used. */
                p_state_current = osd_StateNew( p_this, &file[0], &state[0] );

            if( !p_state_current || !p_state_current->p_pic )
                goto error;

            if( p_state_prev )
                p_state_prev->p_next = p_state_current;
            else
                p_current->p_states = p_state_current;
            p_state_current->p_prev = p_state_prev;

            msg_Dbg( p_this, " |- state=%s, file=%s%s", &state[0], (*p_menu)->psz_path, &file[0] );
        }
        p_current->p_current_state = p_current->p_states;
    }

    /* Find the last button and store its pointer.
     * The OSD menu behaves like a roundrobin list.
     */
    p_current = (*p_menu)->p_button;
    while( p_current && p_current->p_next )
    {
        osd_button_t *p_temp = NULL;
        p_temp = p_current->p_next;
        p_current = p_temp;
    }
    (*p_menu)->p_last_button = p_current;
    fclose( fd );
    return 0;

#undef MAX_FILE_PATH
error:
    msg_Err( p_this, "parsing file failed (returned %d)", result );
    fclose( fd );
    return 1;
}

/*****************************************************************************
 * osd_ConfigUnload: Load and parse osd text configurationfile
 *****************************************************************************/
void osd_ConfigUnload( vlc_object_t *p_this, osd_menu_t **p_osd)
{
    msg_Dbg( p_this, "unloading OSD menu structure" );
    osd_MenuFree( p_this, *p_osd );
}