mdw@git.distorted.org.uk Git - disorder/blob - disobedience/queue.c

   1 /*
   2  * This file is part of DisOrder
   3  * Copyright (C) 2006-2008 Richard Kettlewell
   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 3 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
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18 /** @file disobedience/queue.c
  19  * @brief Disobedience queue widget
  20  */
  21 #include "disobedience.h"
  22 #include "popup.h"
  23 #include "queue-generic.h"
  24
  25 /** @brief The actual queue */
  26 static struct queue_entry *actual_queue;
  27 static struct queue_entry *actual_playing_track;
  28
  29 /** @brief The playing track */
  30 struct queue_entry *playing_track;
  31
  32 /** @brief When we last got the playing track
  33  *
  34  * Set to 0 if the timings are currently off due to having just unpaused.
  35  */
  36 time_t last_playing;
  37
  38 static void queue_completed(void *v,
  39                             const char *err,
  40                             struct queue_entry *q);
  41 static void playing_completed(void *v,
  42                               const char *err,
  43                               struct queue_entry *q);
  44
  45 /** @brief Called when either the actual queue or the playing track change */
  46 static void queue_playing_changed(void) {
  47   /* Check that the playing track isn't in the queue.  There's a race here due
  48    * to the fact that we issue the two commands at slightly different times.
  49    * If it goes wrong we re-issue and try again, so that we never offer up an
  50    * inconsistent state. */
  51   if(actual_playing_track) {
  52     struct queue_entry *q;
  53     for(q = actual_queue; q; q = q->next)
  54       if(!strcmp(q->id, actual_playing_track->id))
  55         break;
  56     if(q) {
  57       disorder_eclient_playing(client, playing_completed, 0);
  58       disorder_eclient_queue(client, queue_completed, 0);
  59       return;
  60     }
  61   }
  62
  63   struct queue_entry *q = xmalloc(sizeof *q);
  64   if(actual_playing_track) {
  65     *q = *actual_playing_track;
  66     q->next = actual_queue;
  67     playing_track = q;
  68   } else {
  69     playing_track = NULL;
  70     q = actual_queue;
  71   }
  72   ql_new_queue(&ql_queue, q);
  73   /* Tell anyone who cares */
  74   event_raise("queue-list-changed", q);
  75   event_raise("playing-track-changed", q);
  76 }
  77
  78 /** @brief Update the queue itself */
  79 static void queue_completed(void attribute((unused)) *v,
  80                             const char *err,
  81                             struct queue_entry *q) {
  82   if(err) {
  83     popup_protocol_error(0, err);
  84     return;
  85   }
  86   actual_queue = q;
  87   queue_playing_changed();
  88 }
  89
  90 /** @brief Update the playing track */
  91 static void playing_completed(void attribute((unused)) *v,
  92                               const char *err,
  93                               struct queue_entry *q) {
  94   if(err) {
  95     popup_protocol_error(0, err);
  96     return;
  97   }
  98   actual_playing_track = q;
  99   queue_playing_changed();
 100   xtime(&last_playing);
 101 }
 102
 103 /** @brief Schedule an update to the queue
 104  *
 105  * Called whenever a track is added to it or removed from it.
 106  */
 107 static void queue_changed(const char attribute((unused)) *event,
 108                            void  attribute((unused)) *eventdata,
 109                            void  attribute((unused)) *callbackdata) {
 110   D(("queue_changed"));
 111   gtk_label_set_text(GTK_LABEL(report_label), "updating queue");
 112   disorder_eclient_queue(client, queue_completed, 0);
 113 }
 114
 115 /** @brief Schedule an update to the playing track
 116  *
 117  * Called whenever it changes
 118  */
 119 static void playing_changed(const char attribute((unused)) *event,
 120                             void  attribute((unused)) *eventdata,
 121                             void  attribute((unused)) *callbackdata) {
 122   D(("playing_changed"));
 123   gtk_label_set_text(GTK_LABEL(report_label), "updating playing track");
 124   /* Setting last_playing=0 means that we don't know what the correct value
 125    * is right now, e.g. because things have been deranged by a pause. */
 126   last_playing = 0;
 127   disorder_eclient_playing(client, playing_completed, 0);
 128 }
 129
 130 /** @brief Called regularly
 131  *
 132  * Updates the played-so-far field
 133  */
 134 static gboolean playing_periodic(gpointer attribute((unused)) data) {
 135   /* If there's a track playing, update its row */
 136   if(playing_track)
 137     ql_update_row(playing_track, 0);
 138   return TRUE;
 139 }
 140
 141 /** @brief Called at startup */
 142 static void queue_init(struct queuelike attribute((unused)) *ql) {
 143   /* Arrange a callback whenever the playing state changes */
 144   event_register("playing-changed", playing_changed, 0);
 145   /* We reget both playing track and queue at pause/resume so that start times
 146    * can be computed correctly */
 147   event_register("pause-changed", playing_changed, 0);
 148   event_register("pause-changed", queue_changed, 0);
 149   /* Reget the queue whenever it changes */
 150   event_register("queue-changed", queue_changed, 0);
 151   /* ...and once a second anyway */
 152   g_timeout_add(1000/*ms*/, playing_periodic, 0);
 153 }
 154
 155 static void queue_move_completed(void attribute((unused)) *v,
 156                                  const char *err) {
 157   if(err) {
 158     popup_protocol_error(0, err);
 159     return;
 160   }
 161   /* The log should tell us the queue changed so we do no more here */
 162 }
 163
 164 /** @brief Called when drag+drop completes */
 165 static void queue_drop(struct queuelike attribute((unused)) *ql,
 166                        int src, int dst) {
 167   struct queue_entry *sq, *dq;
 168   int n;
 169
 170   //fprintf(stderr, "queue_drop %d -> %d\n", src, dst);
 171   if(playing_track) {
 172     /* If there's a playing track then you can't drag it anywhere  */
 173     if(src == 0) {
 174       //fprintf(stderr, "cannot drag playing track\n");
 175       queue_playing_changed();
 176       return;
 177     }
 178     /* If you try to drop before the playing track we assume you missed and
 179      * mean after instead */
 180     if(!dst)
 181       dst = 1;
 182     //fprintf(stderr, "...adjusted to %d -> %d\n\n", src, dst);
 183   }
 184   /* Find the entry to move */
 185   for(n = 0, sq = ql_queue.q; n < src; ++n)
 186     sq = sq->next;
 187   /*fprintf(stderr, "source=%s (%s)\n",
 188           sq->id, sq->track);*/
 189   const int after = dst - 1;
 190   if(after == -1)
 191     dq = 0;
 192   else
 193     /* Find the entry to insert after */
 194     for(n = 0, dq = ql_queue.q; n < after; ++n)
 195       dq = dq->next;
 196   if(dq == playing_track)
 197     dq = 0;
 198 #if 0
 199   if(dq)
 200     fprintf(stderr, "after=%s (%s)\n",
 201             dq->id, dq->track);
 202   else
 203     fprintf(stderr, "after=NULL\n");
 204 #endif
 205   disorder_eclient_moveafter(client,
 206                              dq ? dq->id : "",
 207                              1, &sq->id,
 208                              queue_move_completed, NULL);
 209 }
 210
 211 /** @brief Columns for the queue */
 212 static const struct queue_column queue_columns[] = {
 213   { "When",   column_when,     0,        COL_RIGHT },
 214   { "Who",    column_who,      0,        0 },
 215   { "Artist", column_namepart, "artist", COL_EXPAND|COL_ELLIPSIZE },
 216   { "Album",  column_namepart, "album",  COL_EXPAND|COL_ELLIPSIZE },
 217   { "Title",  column_namepart, "title",  COL_EXPAND|COL_ELLIPSIZE },
 218   { "Length", column_length,   0,        COL_RIGHT }
 219 };
 220
 221 /** @brief Pop-up menu for queue */
 222 static struct menuitem queue_menuitems[] = {
 223   { "Track properties", ql_properties_activate, ql_properties_sensitive, 0, 0 },
 224   { "Select all tracks", ql_selectall_activate, ql_selectall_sensitive, 0, 0 },
 225   { "Deselect all tracks", ql_selectnone_activate, ql_selectnone_sensitive, 0, 0 },
 226   { "Scratch playing track", ql_scratch_activate, ql_scratch_sensitive, 0, 0 },
 227   { "Remove track from queue", ql_remove_activate, ql_remove_sensitive, 0, 0 },
 228   { "Adopt track", ql_adopt_activate, ql_adopt_sensitive, 0, 0 },
 229 };
 230
 231 struct queuelike ql_queue = {
 232   .name = "queue",
 233   .init = queue_init,
 234   .columns = queue_columns,
 235   .ncolumns = sizeof queue_columns / sizeof *queue_columns,
 236   .menuitems = queue_menuitems,
 237   .nmenuitems = sizeof queue_menuitems / sizeof *queue_menuitems,
 238   .drop = queue_drop
 239 };
 240
 241 /** @brief Called when a key is pressed in the queue tree view */
 242 static gboolean queue_key_press(GtkWidget attribute((unused)) *widget,
 243                                 GdkEventKey *event,
 244                                 gpointer user_data) {
 245   /*fprintf(stderr, "queue_key_press type=%d state=%#x keyval=%#x\n",
 246           event->type, event->state, event->keyval);*/
 247   switch(event->keyval) {
 248   case GDK_BackSpace:
 249   case GDK_Delete:
 250     if(event->state)
 251       break;                            /* Only take unmodified DEL/<-- */
 252     ql_remove_activate(0, user_data);
 253     return TRUE;                        /* Do not propagate */
 254   }
 255   return FALSE;                         /* Propagate */
 256 }
 257
 258 GtkWidget *queue_widget(void) {
 259   GtkWidget *const w = init_queuelike(&ql_queue);
 260
 261   /* Catch keypresses */
 262   g_signal_connect(ql_queue.view, "key-press-event",
 263                    G_CALLBACK(queue_key_press), &ql_queue);
 264   return w;
 265 }
 266
 267 /** @brief Return nonzero if @p track is in the queue */
 268 int queued(const char *track) {
 269   struct queue_entry *q;
 270
 271   D(("queued %s", track));
 272   /* Queue will contain resolved name */
 273   track = namepart_resolve(track);
 274   for(q = ql_queue.q; q; q = q->next)
 275     if(!strcmp(q->track, track))
 276       return 1;
 277   return 0;
 278 }
 279
 280 /*
 281 Local Variables:
 282 c-basic-offset:2
 283 comment-column:40
 284 fill-column:79
 285 indent-tabs-mode:nil
 286 End:
 287 */