chiark - git - mdw - 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_drop_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 ntracks,
 167                        char **tracks, char **ids,
 168                        struct queue_entry *after_me) {
 169   int n;
 170
 171   if(ids) {
 172     /* Rearrangement */
 173     if(playing_track) {
 174       /* If there's a playing track then you can't drag it anywhere  */
 175       for(n = 0; n < ntracks; ++n) {
 176         if(!strcmp(playing_track->id, ids[n])) {
 177           fprintf(stderr, "cannot drag playing track\n");
 178           return;
 179         }
 180       }
 181       /* You can't tell the server to drag after the playing track by ID, you
 182        * have to send "". */
 183       if(after_me == playing_track)
 184         after_me = NULL;
 185       /* If you try to drag before the playing track (i.e. after_me=NULL on
 186        * input) then the effect is just to drag after it, although there's no
 187        * longer code to explicitly implement this. */
 188     }
 189     /* Tell the server to move them.  The log will tell us about the change (if
 190      * indeed it succeeds!), so no need to rearrange the model now. */
 191     disorder_eclient_moveafter(client,
 192                                after_me ? after_me->id : "",
 193                                ntracks, (const char **)ids,
 194                                queue_drop_completed, NULL);
 195   } else {
 196     /* You can't tell the server to insert after the playing track by ID, you
 197      * have to send "". */
 198     if(after_me == playing_track)
 199       after_me = NULL;
 200     /* Play the tracks */
 201     disorder_eclient_playafter(client,
 202                                after_me ? after_me->id : "",
 203                                ntracks, (const char **)tracks,
 204                                queue_drop_completed, NULL);
 205   }
 206 }
 207
 208 /** @brief Columns for the queue */
 209 static const struct queue_column queue_columns[] = {
 210   { "When",   column_when,     0,        COL_RIGHT },
 211   { "Who",    column_who,      0,        0 },
 212   { "Artist", column_namepart, "artist", COL_EXPAND|COL_ELLIPSIZE },
 213   { "Album",  column_namepart, "album",  COL_EXPAND|COL_ELLIPSIZE },
 214   { "Title",  column_namepart, "title",  COL_EXPAND|COL_ELLIPSIZE },
 215   { "Length", column_length,   0,        COL_RIGHT }
 216 };
 217
 218 /** @brief Pop-up menu for queue */
 219 static struct menuitem queue_menuitems[] = {
 220   { "Track properties", ql_properties_activate, ql_properties_sensitive, 0, 0 },
 221   { "Select all tracks", ql_selectall_activate, ql_selectall_sensitive, 0, 0 },
 222   { "Deselect all tracks", ql_selectnone_activate, ql_selectnone_sensitive, 0, 0 },
 223   { "Scratch playing track", ql_scratch_activate, ql_scratch_sensitive, 0, 0 },
 224   { "Remove track from queue", ql_remove_activate, ql_remove_sensitive, 0, 0 },
 225   { "Adopt track", ql_adopt_activate, ql_adopt_sensitive, 0, 0 },
 226 };
 227
 228 static const GtkTargetEntry queue_targets[] = {
 229   {
 230     QUEUED_TRACKS,                      /* drag type */
 231     GTK_TARGET_SAME_WIDGET,             /* rearrangement within a widget */
 232     QUEUED_TRACKS_ID                    /* ID value */
 233   },
 234   {
 235     PLAYABLE_TRACKS,                             /* drag type */
 236     GTK_TARGET_SAME_APP|GTK_TARGET_OTHER_WIDGET, /* copying between widgets */
 237     PLAYABLE_TRACKS_ID,                          /* ID value */
 238   },
 239   {
 240     .target = NULL
 241   }
 242 };
 243
 244 struct queuelike ql_queue = {
 245   .name = "queue",
 246   .init = queue_init,
 247   .columns = queue_columns,
 248   .ncolumns = sizeof queue_columns / sizeof *queue_columns,
 249   .menuitems = queue_menuitems,
 250   .nmenuitems = sizeof queue_menuitems / sizeof *queue_menuitems,
 251   .drop = queue_drop,
 252   .drag_source_targets = queue_targets,
 253   .drag_source_actions = GDK_ACTION_MOVE|GDK_ACTION_COPY,
 254   .drag_dest_targets = queue_targets,
 255   .drag_dest_actions = GDK_ACTION_MOVE|GDK_ACTION_COPY,
 256 };
 257
 258 /** @brief Called when a key is pressed in the queue tree view */
 259 static gboolean queue_key_press(GtkWidget attribute((unused)) *widget,
 260                                 GdkEventKey *event,
 261                                 gpointer user_data) {
 262   /*fprintf(stderr, "queue_key_press type=%d state=%#x keyval=%#x\n",
 263           event->type, event->state, event->keyval);*/
 264   switch(event->keyval) {
 265   case GDK_BackSpace:
 266   case GDK_Delete:
 267     if(event->state)
 268       break;                            /* Only take unmodified DEL/<-- */
 269     ql_remove_activate(0, user_data);
 270     return TRUE;                        /* Do not propagate */
 271   }
 272   return FALSE;                         /* Propagate */
 273 }
 274
 275 GtkWidget *queue_widget(void) {
 276   GtkWidget *const w = init_queuelike(&ql_queue);
 277
 278   /* Catch keypresses */
 279   g_signal_connect(ql_queue.view, "key-press-event",
 280                    G_CALLBACK(queue_key_press), &ql_queue);
 281   return w;
 282 }
 283
 284 /** @brief Return nonzero if @p track is in the queue */
 285 int queued(const char *track) {
 286   struct queue_entry *q;
 287
 288   D(("queued %s", track));
 289   /* Queue will contain resolved name */
 290   track = namepart_resolve(track);
 291   for(q = ql_queue.q; q; q = q->next)
 292     if(!strcmp(q->track, track))
 293       return 1;
 294   return 0;
 295 }
 296
 297 /*
 298 Local Variables:
 299 c-basic-offset:2
 300 comment-column:40
 301 fill-column:79
 302 indent-tabs-mode:nil
 303 End:
 304 */