/* * Copyright (C) 2003-2009 The Music Player Daemon Project * http://www.musicpd.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. */ /* * Functions for editing the playlist (adding, removing, reordering * songs in the queue). * */ #include "playlist_internal.h" #include "player_control.h" #include "database.h" #include "uri.h" #include "song.h" #include "idle.h" #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include <stdlib.h> static void playlist_increment_version(struct playlist *playlist) { queue_increment_version(&playlist->queue); idle_add(IDLE_PLAYLIST); } void playlist_clear(struct playlist *playlist) { playlist_stop(playlist); /* make sure there are no references to allocated songs anymore */ for (unsigned i = 0; i < queue_length(&playlist->queue); i++) { const struct song *song = queue_get(&playlist->queue, i); if (!song_in_database(song)) pc_song_deleted(song); } queue_clear(&playlist->queue); playlist->current = -1; playlist_increment_version(playlist); } #ifndef WIN32 enum playlist_result playlist_append_file(struct playlist *playlist, const char *path, int uid, unsigned *added_id) { int ret; struct stat st; struct song *song; if (uid <= 0) /* unauthenticated client */ return PLAYLIST_RESULT_DENIED; ret = stat(path, &st); if (ret < 0) return PLAYLIST_RESULT_ERRNO; if (st.st_uid != (uid_t)uid && (st.st_mode & 0444) != 0444) /* client is not owner */ return PLAYLIST_RESULT_DENIED; song = song_file_load(path, NULL); if (song == NULL) return PLAYLIST_RESULT_NO_SUCH_SONG; return playlist_append_song(playlist, song, added_id); } #endif enum playlist_result playlist_append_song(struct playlist *playlist, struct song *song, unsigned *added_id) { const struct song *queued; unsigned id; if (queue_is_full(&playlist->queue)) return PLAYLIST_RESULT_TOO_LARGE; queued = playlist_get_queued_song(playlist); id = queue_append(&playlist->queue, song); if (playlist->queue.random) { /* shuffle the new song into the list of remaining songs to play */ unsigned start; if (playlist->queued >= 0) start = playlist->queued + 1; else start = playlist->current + 1; if (start < queue_length(&playlist->queue)) queue_shuffle_order_last(&playlist->queue, start, queue_length(&playlist->queue)); } playlist_increment_version(playlist); playlist_update_queued_song(playlist, queued); if (added_id) *added_id = id; return PLAYLIST_RESULT_SUCCESS; } static struct song * song_by_uri(const char *uri) { struct song *song; song = db_get_song(uri); if (song != NULL) return song; if (uri_has_scheme(uri)) return song_remote_new(uri); return NULL; } enum playlist_result playlist_append_uri(struct playlist *playlist, const char *uri, unsigned *added_id) { struct song *song; g_debug("add to playlist: %s", uri); song = song_by_uri(uri); if (song == NULL) return PLAYLIST_RESULT_NO_SUCH_SONG; return playlist_append_song(playlist, song, added_id); } enum playlist_result playlist_swap_songs(struct playlist *playlist, unsigned song1, unsigned song2) { const struct song *queued; if (!queue_valid_position(&playlist->queue, song1) || !queue_valid_position(&playlist->queue, song2)) return PLAYLIST_RESULT_BAD_RANGE; queued = playlist_get_queued_song(playlist); queue_swap(&playlist->queue, song1, song2); if (playlist->queue.random) { /* update the queue order, so that playlist->current still points to the current song order */ queue_swap_order(&playlist->queue, queue_position_to_order(&playlist->queue, song1), queue_position_to_order(&playlist->queue, song2)); } else { /* correct the "current" song order */ if (playlist->current == (int)song1) playlist->current = song2; else if (playlist->current == (int)song2) playlist->current = song1; } playlist_increment_version(playlist); playlist_update_queued_song(playlist, queued); return PLAYLIST_RESULT_SUCCESS; } enum playlist_result playlist_swap_songs_id(struct playlist *playlist, unsigned id1, unsigned id2) { int song1 = queue_id_to_position(&playlist->queue, id1); int song2 = queue_id_to_position(&playlist->queue, id2); if (song1 < 0 || song2 < 0) return PLAYLIST_RESULT_NO_SUCH_SONG; return playlist_swap_songs(playlist, song1, song2); } static void playlist_delete_internal(struct playlist *playlist, unsigned song, const struct song **queued_p) { unsigned songOrder; assert(song < queue_length(&playlist->queue)); songOrder = queue_position_to_order(&playlist->queue, song); if (playlist->playing && playlist->current == (int)songOrder) { bool paused = pc_get_state() == PLAYER_STATE_PAUSE; /* the current song is going to be deleted: stop the player */ pc_stop(); playlist->playing = false; /* see which song is going to be played instead */ playlist->current = queue_next_order(&playlist->queue, playlist->current); if (playlist->current == (int)songOrder) playlist->current = -1; if (playlist->current >= 0 && !paused) /* play the song after the deleted one */ playlist_play_order(playlist, playlist->current); else /* no songs left to play, stop playback completely */ playlist_stop(playlist); *queued_p = NULL; } else if (playlist->current == (int)songOrder) /* there's a "current song" but we're not playing currently - clear "current" */ playlist->current = -1; /* now do it: remove the song */ if (!song_in_database(queue_get(&playlist->queue, song))) pc_song_deleted(queue_get(&playlist->queue, song)); queue_delete(&playlist->queue, song); /* update the "current" and "queued" variables */ if (playlist->current > (int)songOrder) { playlist->current--; } } enum playlist_result playlist_delete(struct playlist *playlist, unsigned song) { const struct song *queued; if (song >= queue_length(&playlist->queue)) return PLAYLIST_RESULT_BAD_RANGE; queued = playlist_get_queued_song(playlist); playlist_delete_internal(playlist, song, &queued); playlist_increment_version(playlist); playlist_update_queued_song(playlist, queued); return PLAYLIST_RESULT_SUCCESS; } enum playlist_result playlist_delete_range(struct playlist *playlist, unsigned start, unsigned end) { const struct song *queued; if (start >= queue_length(&playlist->queue)) return PLAYLIST_RESULT_BAD_RANGE; if (end > queue_length(&playlist->queue)) end = queue_length(&playlist->queue); if (start >= end) return PLAYLIST_RESULT_SUCCESS; queued = playlist_get_queued_song(playlist); do { playlist_delete_internal(playlist, --end, &queued); } while (end != start); playlist_increment_version(playlist); playlist_update_queued_song(playlist, queued); return PLAYLIST_RESULT_SUCCESS; } enum playlist_result playlist_delete_id(struct playlist *playlist, unsigned id) { int song = queue_id_to_position(&playlist->queue, id); if (song < 0) return PLAYLIST_RESULT_NO_SUCH_SONG; return playlist_delete(playlist, song); } void playlist_delete_song(struct playlist *playlist, const struct song *song) { for (int i = queue_length(&playlist->queue) - 1; i >= 0; --i) if (song == queue_get(&playlist->queue, i)) playlist_delete(playlist, i); pc_song_deleted(song); } enum playlist_result playlist_move_range(struct playlist *playlist, unsigned start, unsigned end, int to) { const struct song *queued; int currentSong; if (!queue_valid_position(&playlist->queue, start) || !queue_valid_position(&playlist->queue, end - 1)) return PLAYLIST_RESULT_BAD_RANGE; if ((to >= 0 && to + end - start - 1 >= queue_length(&playlist->queue)) || (to < 0 && abs(to) > (int)queue_length(&playlist->queue))) return PLAYLIST_RESULT_BAD_RANGE; if ((int)start == to) /* nothing happens */ return PLAYLIST_RESULT_SUCCESS; queued = playlist_get_queued_song(playlist); /* * (to < 0) => move to offset from current song * (-playlist.length == to) => move to position BEFORE current song */ currentSong = playlist->current >= 0 ? (int)queue_order_to_position(&playlist->queue, playlist->current) : -1; if (to < 0 && playlist->current >= 0) { if (start <= (unsigned)currentSong && (unsigned)currentSong <= end) /* no-op, can't be moved to offset of itself */ return PLAYLIST_RESULT_SUCCESS; to = (currentSong + abs(to)) % queue_length(&playlist->queue); if (start < (unsigned)to) to--; } queue_move_range(&playlist->queue, start, end, to); if (!playlist->queue.random) { /* update current/queued */ if ((int)start <= playlist->current && (unsigned)playlist->current < end) playlist->current += to - start; else if (playlist->current >= (int)end && playlist->current <= to) { playlist->current -= end - start; } else if (playlist->current >= to && playlist->current < (int)start) { playlist->current += end - start; } } playlist_increment_version(playlist); playlist_update_queued_song(playlist, queued); return PLAYLIST_RESULT_SUCCESS; } enum playlist_result playlist_move_id(struct playlist *playlist, unsigned id1, int to) { int song = queue_id_to_position(&playlist->queue, id1); if (song < 0) return PLAYLIST_RESULT_NO_SUCH_SONG; return playlist_move_range(playlist, song, song+1, to); } void playlist_shuffle(struct playlist *playlist, unsigned start, unsigned end) { const struct song *queued; if (end > queue_length(&playlist->queue)) /* correct the "end" offset */ end = queue_length(&playlist->queue); if ((start+1) >= end) /* needs at least two entries. */ return; queued = playlist_get_queued_song(playlist); if (playlist->playing && playlist->current >= 0) { unsigned current_position; current_position = queue_order_to_position(&playlist->queue, playlist->current); if (current_position >= start && current_position < end) { /* put current playing song first */ queue_swap(&playlist->queue, start, current_position); if (playlist->queue.random) { playlist->current = queue_position_to_order(&playlist->queue, start); } else playlist->current = start; /* start shuffle after the current song */ start++; } } else { /* no playback currently: reset playlist->current */ playlist->current = -1; } queue_shuffle_range(&playlist->queue, start, end); playlist_increment_version(playlist); playlist_update_queued_song(playlist, queued); }