src/filelist.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2009 The Music Player Daemon Project
   3  * Project homepage: http://musicpd.org
   4
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "filelist.h"
  21 #include "libmpdclient.h"
  22
  23 #include <stdbool.h>
  24 #include <string.h>
  25 #include <assert.h>
  26
  27 struct filelist *
  28 filelist_new(void)
  29 {
  30         struct filelist *filelist = g_malloc(sizeof(*filelist));
  31
  32         filelist->entries = g_ptr_array_new();
  33
  34         return filelist;
  35 }
  36
  37 void
  38 filelist_free(struct filelist *filelist)
  39 {
  40         guint i;
  41
  42         for (i = 0; i < filelist_length(filelist); ++i) {
  43                 struct filelist_entry *entry = filelist_get(filelist, i);
  44
  45                 if (entry->entity)
  46                         mpd_freeInfoEntity(entry->entity);
  47
  48                 g_slice_free(struct filelist_entry, entry);
  49         }
  50
  51         g_ptr_array_free(filelist->entries, TRUE);
  52         g_free(filelist);
  53 }
  54
  55 struct filelist_entry *
  56 filelist_append(struct filelist *filelist, struct mpd_InfoEntity *entity)
  57 {
  58         struct filelist_entry *entry = g_slice_new(struct filelist_entry);
  59
  60         entry->flags = 0;
  61         entry->entity = entity;
  62
  63         g_ptr_array_add(filelist->entries, entry);
  64
  65         return entry;
  66 }
  67
  68 struct filelist_entry *
  69 filelist_prepend(struct filelist *filelist, struct mpd_InfoEntity *entity)
  70 {
  71         struct filelist_entry *entry = filelist_append(filelist, entity);
  72
  73         /* this is very slow, but we should optimize screen_artist.c
  74            later so that this function can be removed, so I'm not in
  75            the mood to implement something better here */
  76
  77         if (!filelist_is_empty(filelist)) {
  78                 guint i;
  79
  80                 for (i = filelist_length(filelist) - 1; i > 0; --i)
  81                         g_ptr_array_index(filelist->entries, i) =
  82                                 filelist_get(filelist, i - 1);
  83
  84                 g_ptr_array_index(filelist->entries, 0) = entry;
  85         }
  86
  87         return entry;
  88 }
  89
  90 void
  91 filelist_move(struct filelist *filelist, struct filelist *from)
  92 {
  93         guint i;
  94
  95         for (i = 0; i < filelist_length(from); ++i)
  96                 g_ptr_array_add(filelist->entries,
  97                                 g_ptr_array_index(from->entries, i));
  98
  99         g_ptr_array_set_size(from->entries, 0);
 100 }
 101
 102 static gint
 103 filelist_compare_indirect(gconstpointer ap, gconstpointer bp, gpointer data)
 104 {
 105         GCompareFunc compare_func = data;
 106         gconstpointer a = *(const gconstpointer*)ap;
 107         gconstpointer b = *(const gconstpointer*)bp;
 108
 109         return compare_func(a, b);
 110 }
 111
 112 /* Sorts the whole filelist, at the moment used by filelist_search */
 113 void
 114 filelist_sort_all(struct filelist *filelist, GCompareFunc compare_func)
 115 {
 116         g_ptr_array_sort_with_data(filelist->entries,
 117                         filelist_compare_indirect,
 118                         compare_func);
 119 }
 120
 121
 122 /* Only sorts the directories and playlist files.
 123  * The songs stay in the order it came from mpd. */
 124 void
 125 filelist_sort_dir_play(struct filelist *filelist, GCompareFunc compare_func)
 126 {
 127         unsigned first, last;
 128         const mpd_InfoEntity *iter;
 129
 130         assert(filelist && filelist->entries);
 131
 132         if (filelist->entries->len < 2)
 133                 return;
 134         iter = ((struct filelist_entry*) g_ptr_array_index(filelist->entries, 0))->entity;
 135         /* This can only happen at the beginning of the filelist,
 136          * because NULL stands for "[..]" */
 137         if (iter == NULL) {
 138                 iter = ((struct filelist_entry*) g_ptr_array_index(filelist->entries, 1))->entity;
 139                 first = 1;
 140         }
 141         else
 142                 first = 0;
 143         /* find the last directory entry */
 144         for (last = first+1; last < filelist->entries->len; last++) {
 145                 iter = ((struct filelist_entry*) g_ptr_array_index(filelist->entries, last))->entity;
 146                 if (iter->type != MPD_INFO_ENTITY_TYPE_DIRECTORY)
 147                         break;
 148         }
 149         if (last == filelist->entries->len - 1)
 150                 last++;
 151         /* sort the directories */
 152         if (last - first > 1)
 153                 g_qsort_with_data(filelist->entries->pdata + first,
 154                                 last - first, sizeof(gpointer),
 155                                 filelist_compare_indirect, compare_func);
 156         /* find the first playlist entry */
 157         for (first = last; first < filelist->entries->len; first++) {
 158                 iter = ((struct filelist_entry*) g_ptr_array_index(filelist->entries, first))->entity;
 159                 if (iter->type == MPD_INFO_ENTITY_TYPE_PLAYLISTFILE)
 160                         break;
 161         }
 162         /* sort the playlist entries */
 163         if (filelist->entries->len - first > 1)
 164                 g_qsort_with_data(filelist->entries->pdata + first,
 165                                 filelist->entries->len - first, sizeof(gpointer),
 166                                 filelist_compare_indirect, compare_func);
 167 }
 168
 169 static bool
 170 same_song(const struct mpd_song *a, const struct mpd_song *b)
 171 {
 172         return strcmp(a->file, b->file) == 0;
 173 }
 174
 175 int
 176 filelist_find_song(struct filelist *fl, const struct mpd_song *song)
 177 {
 178         guint i;
 179
 180         assert(song != NULL);
 181
 182         for (i = 0; i < filelist_length(fl); ++i) {
 183                 struct filelist_entry *entry = filelist_get(fl, i);
 184                 mpd_InfoEntity *entity  = entry->entity;
 185
 186                 if (entity && entity->type == MPD_INFO_ENTITY_TYPE_SONG) {
 187                         struct mpd_song *song2 = entity->info.song;
 188
 189                         if (same_song(song, song2))
 190                                 return i;
 191                 }
 192         }
 193
 194         return -1;
 195 }
 196
 197 int
 198 filelist_find_directory(struct filelist *filelist, const char *name)
 199 {
 200         guint i;
 201
 202         assert(name != NULL);
 203
 204         for (i = 0; i < filelist_length(filelist); ++i) {
 205                 struct filelist_entry *entry = filelist_get(filelist, i);
 206                 mpd_InfoEntity *entity  = entry->entity;
 207
 208                 if (entity && entity->type == MPD_INFO_ENTITY_TYPE_DIRECTORY &&
 209                     strcmp(entity->info.directory->path, name) == 0)
 210                         return i;
 211         }
 212
 213         return -1;
 214 }