chiark - git - mdw - disorder/blob - disobedience/playlists.c

   1 /*
   2  * This file is part of DisOrder
   3  * Copyright (C) 2008, 2009 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 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, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * 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, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  18  * USA
  19  */
  20 /** @file disobedience/playlists.c
  21  * @brief Playlist support for Disobedience
  22  *
  23  * The playlists management window contains:
  24  * - the playlist picker (a list of all playlists) TODO should be a tree!
  25  * - an add button
  26  * - a delete button
  27  * - the playlist editor (a d+d-capable view of the currently picked playlist)
  28  * - a close button   TODO
  29  *
  30  * This file also maintains the playlist menu, allowing playlists to be
  31  * activated from the main window's menu.
  32  *
  33  * Internally we maintain the playlist list, which is just the current list of
  34  * playlists.  Changes to this are reflected in the playlist menu and the
  35  * playlist picker.
  36  *
  37  */
  38 #include "disobedience.h"
  39 #include "queue-generic.h"
  40 #include "popup.h"
  41 #include "validity.h"
  42
  43 #if PLAYLISTS
  44
  45 static void playlist_list_received_playlists(void *v,
  46                                              const char *err,
  47                                              int nvec, char **vec);
  48 static void playlist_editor_fill(const char *event,
  49                                  void *eventdata,
  50                                  void *callbackdata);
  51 static int playlist_playall_sensitive(void *extra);
  52 static void playlist_playall_activate(GtkMenuItem *menuitem,
  53                                       gpointer user_data);
  54 static int playlist_remove_sensitive(void *extra) ;
  55 static void playlist_remove_activate(GtkMenuItem *menuitem,
  56                                      gpointer user_data);
  57 static void playlist_new_locked(void *v, const char *err);
  58 static void playlist_new_retrieved(void *v, const char *err,
  59                                    int nvec,
  60                                    char **vec);
  61 static void playlist_new_created(void *v, const char *err);
  62 static void playlist_new_unlocked(void *v, const char *err);
  63 static void playlist_new_entry_edited(GtkEditable *editable,
  64                                       gpointer user_data);
  65 static void playlist_new_button_toggled(GtkToggleButton *tb,
  66                                         gpointer userdata);
  67 static void playlist_new_changed(const char *event,
  68                                  void *eventdata,
  69                                  void *callbackdata);
  70 static const char *playlist_new_valid(void);
  71 static void playlist_new_details(char **namep,
  72                                  char **fullnamep,
  73                                  gboolean *sharedp,
  74                                  gboolean *publicp,
  75                                  gboolean *privatep);
  76 static void playlist_new_ok(GtkButton *button,
  77                             gpointer userdata);
  78 static void playlist_new_cancel(GtkButton *button,
  79                                 gpointer userdata);
  80 static void playlists_editor_received_tracks(void *v,
  81                                              const char *err,
  82                                              int nvec, char **vec);
  83 static void playlist_window_destroyed(GtkWidget *widget,
  84                                       GtkWidget **widget_pointer);
  85 static gboolean playlist_window_keypress(GtkWidget *widget,
  86                                          GdkEventKey *event,
  87                                          gpointer user_data);
  88 static int playlistcmp(const void *ap, const void *bp);
  89 static void playlist_modify_locked(void *v, const char *err);
  90 void playlist_modify_retrieved(void *v, const char *err,
  91                                int nvec,
  92                                char **vec);
  93 static void playlist_modify_updated(void *v, const char *err);
  94 static void playlist_modify_unlocked(void *v, const char *err);
  95 static void playlist_drop(struct queuelike *ql,
  96                           int ntracks,
  97                           char **tracks, char **ids,
  98                           struct queue_entry *after_me);
  99 struct playlist_modify_data;
 100 static void playlist_drop_modify(struct playlist_modify_data *mod,
 101                                  int nvec, char **vec);
 102 static void playlist_remove_modify(struct playlist_modify_data *mod,
 103                                  int nvec, char **vec);
 104 static gboolean playlist_new_keypress(GtkWidget *widget,
 105                                       GdkEventKey *event,
 106                                       gpointer user_data);
 107 static gboolean playlist_picker_keypress(GtkWidget *widget,
 108                                          GdkEventKey *event,
 109                                          gpointer user_data);
 110
 111 /** @brief Playlist editing window */
 112 static GtkWidget *playlist_window;
 113
 114 /** @brief Columns for the playlist editor */
 115 static const struct queue_column playlist_columns[] = {
 116   { "Artist", column_namepart, "artist", COL_EXPAND|COL_ELLIPSIZE },
 117   { "Album",  column_namepart, "album",  COL_EXPAND|COL_ELLIPSIZE },
 118   { "Title",  column_namepart, "title",  COL_EXPAND|COL_ELLIPSIZE },
 119 };
 120
 121 /** @brief Pop-up menu for playlist editor
 122  *
 123  * Status:
 124  * - track properties works but, bizarrely, raises the main window
 125  * - play track works
 126  * - play playlist works
 127  * - select/deselect all work
 128  */
 129 static struct menuitem playlist_menuitems[] = {
 130   { "Track properties", ql_properties_activate, ql_properties_sensitive, 0, 0 },
 131   { "Play track", ql_play_activate, ql_play_sensitive, 0, 0 },
 132   { "Play playlist", playlist_playall_activate, playlist_playall_sensitive, 0, 0 },
 133   { "Remove track from queue", playlist_remove_activate, playlist_remove_sensitive, 0, 0 },
 134   { "Select all tracks", ql_selectall_activate, ql_selectall_sensitive, 0, 0 },
 135   { "Deselect all tracks", ql_selectnone_activate, ql_selectnone_sensitive, 0, 0 },
 136 };
 137
 138 static const GtkTargetEntry playlist_targets[] = {
 139   {
 140     PLAYLIST_TRACKS,                    /* drag type */
 141     GTK_TARGET_SAME_WIDGET,             /* rearrangement within a widget */
 142     PLAYLIST_TRACKS_ID                  /* ID value */
 143   },
 144   {
 145     PLAYABLE_TRACKS,                             /* drag type */
 146     GTK_TARGET_SAME_APP|GTK_TARGET_OTHER_WIDGET, /* copying between widgets */
 147     PLAYABLE_TRACKS_ID,                          /* ID value */
 148   },
 149   {
 150     .target = NULL
 151   }
 152 };
 153
 154 /** @brief Queuelike for editing a playlist */
 155 static struct queuelike ql_playlist = {
 156   .name = "playlist",
 157   .columns = playlist_columns,
 158   .ncolumns = sizeof playlist_columns / sizeof *playlist_columns,
 159   .menuitems = playlist_menuitems,
 160   .nmenuitems = sizeof playlist_menuitems / sizeof *playlist_menuitems,
 161   .drop = playlist_drop,
 162   .drag_source_targets = playlist_targets,
 163   .drag_source_actions = GDK_ACTION_MOVE|GDK_ACTION_COPY,
 164   .drag_dest_targets = playlist_targets,
 165   .drag_dest_actions = GDK_ACTION_MOVE|GDK_ACTION_COPY,
 166 };
 167
 168 /* Maintaining the list of playlists ---------------------------------------- */
 169
 170 /** @brief Current list of playlists or NULL */
 171 char **playlists;
 172
 173 /** @brief Count of playlists */
 174 int nplaylists;
 175
 176 /** @brief Schedule an update to the list of playlists
 177  *
 178  * Called periodically and when a playlist is created or deleted.
 179  */
 180 static void playlist_list_update(const char attribute((unused)) *event,
 181                                  void attribute((unused)) *eventdata,
 182                                  void attribute((unused)) *callbackdata) {
 183   disorder_eclient_playlists(client, playlist_list_received_playlists, 0);
 184 }
 185
 186 /** @brief Called with a new list of playlists */
 187 static void playlist_list_received_playlists(void attribute((unused)) *v,
 188                                              const char *err,
 189                                              int nvec, char **vec) {
 190   if(err) {
 191     playlists = 0;
 192     nplaylists = -1;
 193     /* Probably means server does not support playlists */
 194   } else {
 195     playlists = vec;
 196     nplaylists = nvec;
 197     qsort(playlists, nplaylists, sizeof (char *), playlistcmp);
 198   }
 199   /* Tell our consumers */
 200   event_raise("playlists-updated", 0);
 201 }
 202
 203 /** @brief qsort() callback for playlist name comparison */
 204 static int playlistcmp(const void *ap, const void *bp) {
 205   const char *a = *(char **)ap, *b = *(char **)bp;
 206   const char *ad = strchr(a, '.'), *bd = strchr(b, '.');
 207   int c;
 208
 209   /* Group owned playlists by owner */
 210   if(ad && bd) {
 211     const int adn = ad - a, bdn = bd - b;
 212     if((c = strncmp(a, b, adn < bdn ? adn : bdn)))
 213       return c;
 214     /* Lexical order within playlists of a single owner */
 215     return strcmp(ad + 1, bd + 1);
 216   }
 217
 218   /* Owned playlists after shared ones */
 219   if(ad) {
 220     return 1;
 221   } else if(bd) {
 222     return -1;
 223   }
 224
 225   /* Lexical order of shared playlists */
 226   return strcmp(a, b);
 227 }
 228
 229 /* Playlists menu ----------------------------------------------------------- */
 230
 231 static void playlist_menu_playing(void attribute((unused)) *v,
 232                                   const char *err) {
 233   if(err)
 234     popup_protocol_error(0, err);
 235 }
 236
 237 /** @brief Play received playlist contents
 238  *
 239  * Passed as a completion callback by menu_activate_playlist().
 240  */
 241 static void playlist_menu_received_content(void attribute((unused)) *v,
 242                                            const char *err,
 243                                            int nvec, char **vec) {
 244   if(err) {
 245     popup_protocol_error(0, err);
 246     return;
 247   }
 248   for(int n = 0; n < nvec; ++n)
 249     disorder_eclient_play(client, vec[n], playlist_menu_playing, NULL);
 250 }
 251
 252 /** @brief Called to activate a playlist
 253  *
 254  * Called when the menu item for a playlist is clicked.
 255  */
 256 static void playlist_menu_activate(GtkMenuItem *menuitem,
 257                                    gpointer attribute((unused)) user_data) {
 258   GtkLabel *label = GTK_LABEL(GTK_BIN(menuitem)->child);
 259   const char *playlist = gtk_label_get_text(label);
 260
 261   disorder_eclient_playlist_get(client, playlist_menu_received_content,
 262                                 playlist, NULL);
 263 }
 264
 265 /** @brief Called when the playlists change
 266  *
 267  * Naively refills the menu.  The results might be unsettling if the menu is
 268  * currently open, but this is hopefuly fairly rare.
 269  */
 270 static void playlist_menu_changed(const char attribute((unused)) *event,
 271                                   void attribute((unused)) *eventdata,
 272                                   void attribute((unused)) *callbackdata) {
 273   if(!playlists_menu)
 274     return;                             /* OMG too soon */
 275   GtkMenuShell *menu = GTK_MENU_SHELL(playlists_menu);
 276   while(menu->children)
 277     gtk_container_remove(GTK_CONTAINER(menu), GTK_WIDGET(menu->children->data));
 278   /* NB nplaylists can be -1 as well as 0 */
 279   for(int n = 0; n < nplaylists; ++n) {
 280     GtkWidget *w = gtk_menu_item_new_with_label(playlists[n]);
 281     g_signal_connect(w, "activate", G_CALLBACK(playlist_menu_activate), 0);
 282     gtk_widget_show(w);
 283     gtk_menu_shell_append(menu, w);
 284   }
 285   gtk_widget_set_sensitive(menu_playlists_widget,
 286                            nplaylists > 0);
 287   gtk_widget_set_sensitive(menu_editplaylists_widget,
 288                            nplaylists >= 0);
 289 }
 290
 291 /* Popup to create a new playlist ------------------------------------------- */
 292
 293 /** @brief New-playlist popup */
 294 static GtkWidget *playlist_new_window;
 295
 296 /** @brief Text entry in new-playlist popup */
 297 static GtkWidget *playlist_new_entry;
 298
 299 /** @brief Label for displaying feedback on what's wrong */
 300 static GtkWidget *playlist_new_info;
 301
 302 /** @brief "Shared" radio button */
 303 static GtkWidget *playlist_new_shared;
 304
 305 /** @brief "Public" radio button */
 306 static GtkWidget *playlist_new_public;
 307
 308 /** @brief "Private" radio button */
 309 static GtkWidget *playlist_new_private;
 310
 311 /** @brief Buttons for new-playlist popup */
 312 static struct button playlist_new_buttons[] = {
 313   {
 314     .stock = GTK_STOCK_OK,
 315     .clicked = playlist_new_ok,
 316     .tip = "Create new playlist"
 317   },
 318   {
 319     .stock = GTK_STOCK_CANCEL,
 320     .clicked = playlist_new_cancel,
 321     .tip = "Do not create new playlist"
 322   }
 323 };
 324 #define NPLAYLIST_NEW_BUTTONS (sizeof playlist_new_buttons / sizeof *playlist_new_buttons)
 325
 326 /** @brief Pop up a new window to enter the playlist name and details */
 327 static void playlist_new_playlist(void) {
 328   assert(playlist_new_window == NULL);
 329   playlist_new_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 330   g_signal_connect(playlist_new_window, "destroy",
 331                    G_CALLBACK(gtk_widget_destroyed), &playlist_new_window);
 332   gtk_window_set_title(GTK_WINDOW(playlist_new_window), "Create new playlist");
 333   /* Window will be modal, suppressing access to other windows */
 334   gtk_window_set_modal(GTK_WINDOW(playlist_new_window), TRUE);
 335   gtk_window_set_transient_for(GTK_WINDOW(playlist_new_window),
 336                                GTK_WINDOW(playlist_window));
 337
 338   /* Window contents will use a table (grid) layout */
 339   GtkWidget *table = gtk_table_new(3, 3, FALSE/*!homogeneous*/);
 340
 341   /* First row: playlist name */
 342   gtk_table_attach_defaults(GTK_TABLE(table),
 343                             gtk_label_new("Playlist name"),
 344                             0, 1, 0, 1);
 345   playlist_new_entry = gtk_entry_new();
 346   g_signal_connect(playlist_new_entry, "changed",
 347                    G_CALLBACK(playlist_new_entry_edited), NULL);
 348   gtk_table_attach_defaults(GTK_TABLE(table),
 349                             playlist_new_entry,
 350                             1, 3, 0, 1);
 351
 352   /* Second row: radio buttons to choose type */
 353   playlist_new_shared = gtk_radio_button_new_with_label(NULL, "shared");
 354   playlist_new_public
 355     = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(playlist_new_shared),
 356                                                   "public");
 357   playlist_new_private
 358     = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(playlist_new_shared),
 359                                                   "private");
 360   g_signal_connect(playlist_new_shared, "toggled",
 361                    G_CALLBACK(playlist_new_button_toggled), NULL);
 362   g_signal_connect(playlist_new_public, "toggled",
 363                    G_CALLBACK(playlist_new_button_toggled), NULL);
 364   g_signal_connect(playlist_new_private, "toggled",
 365                    G_CALLBACK(playlist_new_button_toggled), NULL);
 366   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_shared, 0, 1, 1, 2);
 367   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_public, 1, 2, 1, 2);
 368   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_private, 2, 3, 1, 2);
 369
 370   /* Third row: info bar saying why not */
 371   playlist_new_info = gtk_label_new("");
 372   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_info,
 373                             0, 3, 2, 3);
 374
 375   /* Fourth row: ok/cancel buttons */
 376   GtkWidget *hbox = create_buttons_box(playlist_new_buttons,
 377                                        NPLAYLIST_NEW_BUTTONS,
 378                                        gtk_hbox_new(FALSE, 0));
 379   gtk_table_attach_defaults(GTK_TABLE(table), hbox, 0, 3, 3, 4);
 380
 381   gtk_container_add(GTK_CONTAINER(playlist_new_window),
 382                     frame_widget(table, NULL));
 383
 384   /* Set initial state of OK button */
 385   playlist_new_changed(0,0,0);
 386
 387   g_signal_connect(playlist_new_window, "key-press-event",
 388                    G_CALLBACK(playlist_new_keypress), 0);
 389
 390   /* Display the window */
 391   gtk_widget_show_all(playlist_new_window);
 392 }
 393
 394 /** @brief Keypress handler */
 395 static gboolean playlist_new_keypress(GtkWidget attribute((unused)) *widget,
 396                                       GdkEventKey *event,
 397                                       gpointer attribute((unused)) user_data) {
 398   if(event->state)
 399     return FALSE;
 400   switch(event->keyval) {
 401   case GDK_Return:
 402     playlist_new_ok(NULL, NULL);
 403     return TRUE;
 404   case GDK_Escape:
 405     gtk_widget_destroy(playlist_new_window);
 406     return TRUE;
 407   default:
 408     return FALSE;
 409   }
 410 }
 411
 412 /** @brief Called when 'ok' is clicked in new-playlist popup */
 413 static void playlist_new_ok(GtkButton attribute((unused)) *button,
 414                             gpointer attribute((unused)) userdata) {
 415   if(playlist_new_valid())
 416     return;
 417   gboolean shared, public, private;
 418   char *name, *fullname;
 419   playlist_new_details(&name, &fullname, &shared, &public, &private);
 420
 421   /* We need to:
 422    * - lock the playlist
 423    * - check it doesn't exist
 424    * - set sharing (which will create it empty
 425    * - unlock it
 426    *
 427    * TODO we should freeze the window while this is going on to stop a second
 428    * click.
 429    */
 430   disorder_eclient_playlist_lock(client, playlist_new_locked, fullname,
 431                                  fullname);
 432 }
 433
 434 /** @brief Called when the proposed new playlist has been locked */
 435 static void playlist_new_locked(void *v, const char *err) {
 436   char *fullname = v;
 437   if(err) {
 438     popup_protocol_error(0, err);
 439     return;
 440   }
 441   disorder_eclient_playlist_get(client, playlist_new_retrieved,
 442                                 fullname, fullname);
 443 }
 444
 445 /** @brief Called when the proposed new playlist's contents have been retrieved
 446  *
 447  * ...or rather, normally, when it's been reported that it does not exist.
 448  */
 449 static void playlist_new_retrieved(void *v, const char *err,
 450                                    int nvec,
 451                                    char attribute((unused)) **vec) {
 452   char *fullname = v;
 453   if(!err && nvec != -1)
 454     /* A rare case but not in principle impossible */
 455     err = "A playlist with that name already exists.";
 456   if(err) {
 457     popup_protocol_error(0, err);
 458     disorder_eclient_playlist_unlock(client, playlist_new_unlocked, fullname);
 459     return;
 460   }
 461   gboolean shared, public, private;
 462   playlist_new_details(0, 0, &shared, &public, &private);
 463   disorder_eclient_playlist_set_share(client, playlist_new_created, fullname,
 464                                       public ? "public"
 465                                       : private ? "private"
 466                                       : "shared",
 467                                       fullname);
 468 }
 469
 470 /** @brief Called when the new playlist has been created */
 471 static void playlist_new_created(void attribute((unused)) *v, const char *err) {
 472   if(err) {
 473     popup_protocol_error(0, err);
 474     return;
 475   }
 476   disorder_eclient_playlist_unlock(client, playlist_new_unlocked, NULL);
 477   // TODO arrange for the new playlist to be selected
 478 }
 479
 480 /** @brief Called when the newly created playlist has unlocked */
 481 static void playlist_new_unlocked(void attribute((unused)) *v, const char *err) {
 482   if(err)
 483     popup_protocol_error(0, err);
 484   /* Pop down the creation window */
 485   gtk_widget_destroy(playlist_new_window);
 486 }
 487
 488 /** @brief Called when 'cancel' is clicked in new-playlist popup */
 489 static void playlist_new_cancel(GtkButton attribute((unused)) *button,
 490                                 gpointer attribute((unused)) userdata) {
 491   gtk_widget_destroy(playlist_new_window);
 492 }
 493
 494 /** @brief Called when some radio button in the new-playlist popup changes */
 495 static void playlist_new_button_toggled(GtkToggleButton attribute((unused)) *tb,
 496                                         gpointer attribute((unused)) userdata) {
 497   playlist_new_changed(0,0,0);
 498 }
 499
 500 /** @brief Called when the text entry field in the new-playlist popup changes */
 501 static void playlist_new_entry_edited(GtkEditable attribute((unused)) *editable,
 502                                       gpointer attribute((unused)) user_data) {
 503   playlist_new_changed(0,0,0);
 504 }
 505
 506 /** @brief Called to update new playlist window state
 507  *
 508  * This is called whenever one the text entry or radio buttons changed, and
 509  * also when the set of known playlists changes.  It determines whether the new
 510  * playlist would be creatable and sets the sensitivity of the OK button
 511  * and info display accordingly.
 512  */
 513 static void playlist_new_changed(const char attribute((unused)) *event,
 514                                  void attribute((unused)) *eventdata,
 515                                  void attribute((unused)) *callbackdata) {
 516   if(!playlist_new_window)
 517     return;
 518   const char *reason = playlist_new_valid();
 519   gtk_widget_set_sensitive(playlist_new_buttons[0].widget,
 520                            !reason);
 521   gtk_label_set_text(GTK_LABEL(playlist_new_info), reason);
 522 }
 523
 524 /** @brief Test whether the new-playlist window settings are valid
 525  * @return NULL on success or an error string if not
 526  */
 527 static const char *playlist_new_valid(void) {
 528   gboolean shared, public, private;
 529   char *name, *fullname;
 530   playlist_new_details(&name, &fullname, &shared, &public, &private);
 531   if(!(shared || public || private))
 532     return "No type set.";
 533   if(!*name)
 534     return "";
 535   /* See if the result is valid */
 536   if(!valid_username(name)
 537      || playlist_parse_name(fullname, NULL, NULL))
 538     return "Not a valid playlist name.";
 539   /* See if the result clashes with an existing name.  This is not a perfect
 540    * check, the playlist might be created after this point but before we get a
 541    * chance to disable the "OK" button.  However when we try to create the
 542    * playlist we will first try to retrieve it, with a lock held, so we
 543    * shouldn't end up overwriting anything. */
 544   for(int n = 0; n < nplaylists; ++n)
 545     if(!strcmp(playlists[n], fullname)) {
 546       if(shared)
 547         return "A shared playlist with that name already exists.";
 548       else
 549         return "You already have a playlist with that name.";
 550     }
 551   /* As far as we can tell creation would work */
 552   return NULL;
 553 }
 554
 555 /** @brief Get entered new-playlist details
 556  * @param namep Where to store entered name (or NULL)
 557  * @param fullnamep Where to store computed full name (or NULL)
 558  * @param sharep Where to store 'shared' flag (or NULL)
 559  * @param publicp Where to store 'public' flag (or NULL)
 560  * @param privatep Where to store 'private' flag (or NULL)
 561  */
 562 static void playlist_new_details(char **namep,
 563                                  char **fullnamep,
 564                                  gboolean *sharedp,
 565                                  gboolean *publicp,
 566                                  gboolean *privatep) {
 567   gboolean shared, public, private;
 568   g_object_get(playlist_new_shared, "active", &shared, (char *)NULL);
 569   g_object_get(playlist_new_public, "active", &public, (char *)NULL);
 570   g_object_get(playlist_new_private, "active", &private, (char *)NULL);
 571   char *gname = gtk_editable_get_chars(GTK_EDITABLE(playlist_new_entry),
 572                                        0, -1); /* name owned by calle */
 573   char *name = xstrdup(gname);
 574   g_free(gname);
 575   if(sharedp) *sharedp = shared;
 576   if(publicp) *publicp = public;
 577   if(privatep) *privatep = private;
 578   if(namep) *namep = name;
 579   if(fullnamep) {
 580     if(*sharedp) *fullnamep = *namep;
 581     else byte_xasprintf(fullnamep, "%s.%s", config->username, name);
 582   }
 583 }
 584
 585 /* Playlist picker ---------------------------------------------------------- */
 586
 587 /** @brief Delete button */
 588 static GtkWidget *playlist_picker_delete_button;
 589
 590 /** @brief Tree model for list of playlists */
 591 static GtkListStore *playlist_picker_list;
 592
 593 /** @brief Selection for list of playlists */
 594 static GtkTreeSelection *playlist_picker_selection;
 595
 596 /** @brief Currently selected playlist */
 597 static const char *playlist_picker_selected;
 598
 599 /** @brief (Re-)populate the playlist picker tree model */
 600 static void playlist_picker_fill(const char attribute((unused)) *event,
 601                                  void attribute((unused)) *eventdata,
 602                                  void attribute((unused)) *callbackdata) {
 603   GtkTreeIter iter[1];
 604
 605   if(!playlist_window)
 606     return;
 607   if(!playlist_picker_list)
 608     playlist_picker_list = gtk_list_store_new(1, G_TYPE_STRING);
 609   const char *was_selected = playlist_picker_selected;
 610   gtk_list_store_clear(playlist_picker_list); /* clears playlists_selected */
 611   for(int n = 0; n < nplaylists; ++n) {
 612     gtk_list_store_insert_with_values(playlist_picker_list, iter,
 613                                       n                /*position*/,
 614                                       0, playlists[n], /* column 0 */
 615                                       -1);             /* no more cols */
 616     /* Reselect the selected playlist */
 617     if(was_selected && !strcmp(was_selected, playlists[n]))
 618       gtk_tree_selection_select_iter(playlist_picker_selection, iter);
 619   }
 620   /* TODO deselecting then reselecting the current playlist resets the playlist
 621    * editor, which trashes the user's selection. */
 622 }
 623
 624 /** @brief Called when the selection might have changed */
 625 static void playlist_picker_selection_changed(GtkTreeSelection attribute((unused)) *treeselection,
 626                                               gpointer attribute((unused)) user_data) {
 627   GtkTreeIter iter;
 628   char *gselected, *selected;
 629
 630   /* Identify the current selection */
 631   if(gtk_tree_selection_get_selected(playlist_picker_selection, 0, &iter)) {
 632     gtk_tree_model_get(GTK_TREE_MODEL(playlist_picker_list), &iter,
 633                        0, &gselected, -1);
 634     selected = xstrdup(gselected);
 635     g_free(gselected);
 636   } else
 637     selected = 0;
 638   /* Set button sensitivity according to the new state */
 639   if(selected)
 640     gtk_widget_set_sensitive(playlist_picker_delete_button, 1);
 641   else
 642     gtk_widget_set_sensitive(playlist_picker_delete_button, 0);
 643   /* TODO delete should not be sensitive for public playlists owned by other
 644    * users */
 645   /* Eliminate no-change cases */
 646   if(!selected && !playlist_picker_selected)
 647     return;
 648   if(selected
 649      && playlist_picker_selected
 650      && !strcmp(selected, playlist_picker_selected))
 651     return;
 652   /* Record the new state */
 653   playlist_picker_selected = selected;
 654   /* Re-initalize the queue */
 655   ql_new_queue(&ql_playlist, NULL);
 656   playlist_editor_fill(NULL, (void *)playlist_picker_selected, NULL);
 657 }
 658
 659 /** @brief Called when the 'add' button is pressed */
 660 static void playlist_picker_add(GtkButton attribute((unused)) *button,
 661                                 gpointer attribute((unused)) userdata) {
 662   /* Unselect whatever is selected TODO why?? */
 663   gtk_tree_selection_unselect_all(playlist_picker_selection);
 664   playlist_new_playlist();
 665 }
 666
 667 /** @brief Called when playlist deletion completes */
 668 static void playlists_picker_delete_completed(void attribute((unused)) *v,
 669                                               const char *err) {
 670   if(err)
 671     popup_protocol_error(0, err);
 672 }
 673
 674 /** @brief Called when the 'Delete' button is pressed */
 675 static void playlist_picker_delete(GtkButton attribute((unused)) *button,
 676                                    gpointer attribute((unused)) userdata) {
 677   GtkWidget *yesno;
 678   int res;
 679
 680   if(!playlist_picker_selected)
 681     return;
 682   yesno = gtk_message_dialog_new(GTK_WINDOW(playlist_window),
 683                                  GTK_DIALOG_MODAL,
 684                                  GTK_MESSAGE_QUESTION,
 685                                  GTK_BUTTONS_YES_NO,
 686                                  "Do you really want to delete playlist %s?"
 687                                  " This action cannot be undone.",
 688                                  playlist_picker_selected);
 689   res = gtk_dialog_run(GTK_DIALOG(yesno));
 690   gtk_widget_destroy(yesno);
 691   if(res == GTK_RESPONSE_YES) {
 692     disorder_eclient_playlist_delete(client,
 693                                      playlists_picker_delete_completed,
 694                                      playlist_picker_selected,
 695                                      NULL);
 696   }
 697 }
 698
 699 /** @brief Table of buttons below the playlist list */
 700 static struct button playlist_picker_buttons[] = {
 701   {
 702     GTK_STOCK_ADD,
 703     playlist_picker_add,
 704     "Create a new playlist",
 705     0
 706   },
 707   {
 708     GTK_STOCK_REMOVE,
 709     playlist_picker_delete,
 710     "Delete a playlist",
 711     0
 712   },
 713 };
 714 #define NPLAYLIST_PICKER_BUTTONS (sizeof playlist_picker_buttons / sizeof *playlist_picker_buttons)
 715
 716 /** @brief Create the list of playlists for the edit playlists window */
 717 static GtkWidget *playlist_picker_create(void) {
 718   /* Create the list of playlist and populate it */
 719   playlist_picker_fill(NULL, NULL, NULL);
 720   /* Create the tree view */
 721   GtkWidget *tree = gtk_tree_view_new_with_model(GTK_TREE_MODEL(playlist_picker_list));
 722   /* ...and the renderers for it */
 723   GtkCellRenderer *cr = gtk_cell_renderer_text_new();
 724   GtkTreeViewColumn *col = gtk_tree_view_column_new_with_attributes("Playlist",
 725                                                                     cr,
 726                                                                     "text", 0,
 727                                                                     NULL);
 728   gtk_tree_view_append_column(GTK_TREE_VIEW(tree), col);
 729   /* Get the selection for the view; set its mode; arrange for a callback when
 730    * it changes */
 731   playlist_picker_selected = NULL;
 732   playlist_picker_selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(tree));
 733   gtk_tree_selection_set_mode(playlist_picker_selection, GTK_SELECTION_BROWSE);
 734   g_signal_connect(playlist_picker_selection, "changed",
 735                    G_CALLBACK(playlist_picker_selection_changed), NULL);
 736
 737   /* Create the control buttons */
 738   GtkWidget *buttons = create_buttons_box(playlist_picker_buttons,
 739                                           NPLAYLIST_PICKER_BUTTONS,
 740                                           gtk_hbox_new(FALSE, 1));
 741   playlist_picker_delete_button = playlist_picker_buttons[1].widget;
 742
 743   playlist_picker_selection_changed(NULL, NULL);
 744
 745   /* Buttons live below the list */
 746   GtkWidget *vbox = gtk_vbox_new(FALSE, 0);
 747   gtk_box_pack_start(GTK_BOX(vbox), scroll_widget(tree), TRUE/*expand*/, TRUE/*fill*/, 0);
 748   gtk_box_pack_start(GTK_BOX(vbox), buttons, FALSE/*expand*/, FALSE, 0);
 749
 750   g_signal_connect(tree, "key-press-event",
 751                    G_CALLBACK(playlist_picker_keypress), 0);
 752
 753   return vbox;
 754 }
 755
 756 static gboolean playlist_picker_keypress(GtkWidget attribute((unused)) *widget,
 757                                          GdkEventKey *event,
 758                                          gpointer attribute((unused)) user_data) {
 759   if(event->state)
 760     return FALSE;
 761   switch(event->keyval) {
 762   case GDK_BackSpace:
 763   case GDK_Delete:
 764     playlist_picker_delete(NULL, NULL);
 765     return TRUE;
 766   default:
 767     return FALSE;
 768   }
 769 }
 770
 771 static void playlist_picker_destroy(void) {
 772   playlist_picker_delete_button = NULL;
 773   g_object_unref(playlist_picker_list);
 774   playlist_picker_list = NULL;
 775   playlist_picker_selection = NULL;
 776   playlist_picker_selected = NULL;
 777 }
 778
 779 /* Playlist editor ---------------------------------------------------------- */
 780
 781 static GtkWidget *playlists_editor_create(void) {
 782   assert(ql_playlist.view == NULL);     /* better not be set up already */
 783   GtkWidget *w = init_queuelike(&ql_playlist);
 784   /* Initially empty */
 785   return w;
 786 }
 787
 788 /** @brief (Re-)populate the playlist tree model */
 789 static void playlist_editor_fill(const char attribute((unused)) *event,
 790                                  void *eventdata,
 791                                  void attribute((unused)) *callbackdata) {
 792   const char *modified_playlist = eventdata;
 793   if(!playlist_window)
 794     return;
 795   if(!playlist_picker_selected)
 796     return;
 797   if(!strcmp(playlist_picker_selected, modified_playlist))
 798     disorder_eclient_playlist_get(client, playlists_editor_received_tracks,
 799                                   playlist_picker_selected,
 800                                   (void *)playlist_picker_selected);
 801 }
 802
 803 /** @brief Called with new tracks for the playlist */
 804 static void playlists_editor_received_tracks(void *v,
 805                                              const char *err,
 806                                              int nvec, char **vec) {
 807   const char *playlist = v;
 808   if(err) {
 809     popup_protocol_error(0, err);
 810     return;
 811   }
 812   if(!playlist_picker_selected
 813      || strcmp(playlist, playlist_picker_selected)) {
 814     /* The tracks are for the wrong playlist - something must have changed
 815      * while the fetch command was in flight.  We just ignore this callback,
 816      * the right answer will be requested and arrive in due course. */
 817     return;
 818   }
 819   if(nvec == -1)
 820     /* No such playlist, presumably we'll get a deleted event shortly */
 821     return;
 822   /* Translate the list of tracks into queue entries */
 823   struct queue_entry *newq, **qq = &newq, *qprev = NULL;
 824   hash *h = hash_new(sizeof(int));
 825   for(int n = 0; n < nvec; ++n) {
 826     struct queue_entry *q = xmalloc(sizeof *q);
 827     q->prev = qprev;
 828     q->track = vec[n];
 829     /* Synthesize a unique ID so that the selection survives updates.  Tracks
 830      * can appear more than once in the queue so we can't use raw track names,
 831      * so we add a serial number to the start. */
 832     int *serialp = hash_find(h, vec[n]), serial = serialp ? *serialp : 0;
 833     byte_xasprintf((char **)&q->id, "%d-%s", serial++, vec[n]);
 834     hash_add(h, vec[n], &serial, HASH_INSERT_OR_REPLACE);
 835     *qq = q;
 836     qq = &q->next;
 837     qprev = q;
 838   }
 839   *qq = NULL;
 840   ql_new_queue(&ql_playlist, newq);
 841 }
 842
 843 /* Playlist mutation -------------------------------------------------------- */
 844
 845 /** @brief State structure for guarded playlist modification
 846  *
 847  * To safely move, insert or delete rows we must:
 848  * - take a lock
 849  * - fetch the playlist
 850  * - verify it's not changed
 851  * - update the playlist contents
 852  * - store the playlist
 853  * - release the lock
 854  *
 855  * The playlist_modify_ functions do just that.
 856  *
 857  * To kick things off create one of these and disorder_eclient_playlist_lock()
 858  * with playlist_modify_locked() as its callback.  @c modify will be called; it
 859  * should disorder_eclient_playlist_set() to set the new state with
 860  * playlist_modify_updated() as its callback.
 861  */
 862 struct playlist_modify_data {
 863   /** @brief Affected playlist */
 864   const char *playlist;
 865   /** @brief Modification function
 866    * @param mod Pointer back to state structure
 867    * @param ntracks Length of playlist
 868    * @param tracks Tracks in playlist
 869    */
 870   void (*modify)(struct playlist_modify_data *mod,
 871                 int ntracks, char **tracks);
 872
 873   /** @brief Number of tracks dropped */
 874   int ntracks;
 875   /** @brief Track names dropped */
 876   char **tracks;
 877   /** @brief Track IDs dropped */
 878   char **ids;
 879   /** @brief Drop after this point */
 880   struct queue_entry *after_me;
 881 };
 882
 883 /** @brief Called with playlist locked
 884  *
 885  * This is the entry point for guarded modification ising @ref
 886  * playlist_modify_data.
 887  */
 888 static void playlist_modify_locked(void *v, const char *err) {
 889   struct playlist_modify_data *mod = v;
 890   if(err) {
 891     popup_protocol_error(0, err);
 892     return;
 893   }
 894   disorder_eclient_playlist_get(client, playlist_modify_retrieved,
 895                                 mod->playlist, mod);
 896 }
 897
 898 /** @brief Called with current playlist contents
 899  * Checks that the playlist is still current and has not changed.
 900  */
 901 void playlist_modify_retrieved(void *v, const char *err,
 902                                int nvec,
 903                                char **vec) {
 904   struct playlist_modify_data *mod = v;
 905   if(err) {
 906     popup_protocol_error(0, err);
 907     disorder_eclient_playlist_unlock(client, playlist_modify_unlocked, NULL);
 908     return;
 909   }
 910   if(nvec < 0
 911      || !playlist_picker_selected
 912      || strcmp(mod->playlist, playlist_picker_selected)) {
 913     disorder_eclient_playlist_unlock(client, playlist_modify_unlocked, NULL);
 914     return;
 915   }
 916   /* We check that the contents haven't changed.  If they have we just abandon
 917    * the operation.  The user will have to try again. */
 918   struct queue_entry *q;
 919   int n;
 920   for(n = 0, q = ql_playlist.q; q && n < nvec; ++n, q = q->next)
 921     if(strcmp(q->track, vec[n]))
 922       break;
 923   if(n != nvec || q != NULL)  {
 924     disorder_eclient_playlist_unlock(client, playlist_modify_unlocked, NULL);
 925     return;
 926   }
 927   mod->modify(mod, nvec, vec);
 928 }
 929
 930 /** @brief Called when the playlist has been updated */
 931 static void playlist_modify_updated(void attribute((unused)) *v,
 932                                     const char *err) {
 933   if(err)
 934     popup_protocol_error(0, err);
 935   disorder_eclient_playlist_unlock(client, playlist_modify_unlocked, NULL);
 936 }
 937
 938 /** @brief Called when the playlist has been unlocked */
 939 static void playlist_modify_unlocked(void attribute((unused)) *v,
 940                                      const char *err) {
 941   if(err)
 942     popup_protocol_error(0, err);
 943 }
 944
 945 /* Drop tracks into a playlist ---------------------------------------------- */
 946
 947 static void playlist_drop(struct queuelike attribute((unused)) *ql,
 948                           int ntracks,
 949                           char **tracks, char **ids,
 950                           struct queue_entry *after_me) {
 951   struct playlist_modify_data *mod = xmalloc(sizeof *mod);
 952
 953   mod->playlist = playlist_picker_selected;
 954   mod->modify = playlist_drop_modify;
 955   mod->ntracks = ntracks;
 956   mod->tracks = tracks;
 957   mod->ids = ids;
 958   mod->after_me = after_me;
 959   disorder_eclient_playlist_lock(client, playlist_modify_locked,
 960                                  mod->playlist, mod);
 961 }
 962
 963 /** @brief Return true if track @p i is in the moved set */
 964 static int playlist_drop_is_moved(struct playlist_modify_data *mod,
 965                                   int i) {
 966   struct queue_entry *q;
 967
 968   /* Find the q corresponding to i, so we can get the ID */
 969   for(q = ql_playlist.q; i; q = q->next, --i)
 970     ;
 971   /* See if track i matches any of the moved set by ID */
 972   for(int n = 0; n < mod->ntracks; ++n)
 973     if(!strcmp(q->id, mod->ids[n]))
 974       return 1;
 975   return 0;
 976 }
 977
 978 static void playlist_drop_modify(struct playlist_modify_data *mod,
 979                                  int nvec, char **vec) {
 980   char **newvec;
 981   int nnewvec;
 982
 983   //fprintf(stderr, "\nplaylist_drop_modify\n");
 984   /* after_me is the queue_entry to insert after, or NULL to insert at the
 985    * beginning (including the case when the playlist is empty) */
 986   //fprintf(stderr, "after_me = %s\n",
 987   //        mod->after_me ? mod->after_me->track : "NULL");
 988   struct queue_entry *q = ql_playlist.q;
 989   int ins = 0;
 990   if(mod->after_me) {
 991     ++ins;
 992     while(q && q != mod->after_me) {
 993       q = q->next;
 994       ++ins;
 995     }
 996   }
 997   /* Now ins is the index to insert at; equivalently, the row to insert before,
 998    * and so equal to nvec to append. */
 999 #if 0
1000   fprintf(stderr, "ins = %d = %s\n",
1001           ins, ins < nvec ? vec[ins] : "NULL");
1002   for(int n = 0; n < nvec; ++n)
1003     fprintf(stderr, "%d: %s %s\n", n, n == ins ? "->" : "  ", vec[n]);
1004   fprintf(stderr, "nvec = %d\n", nvec);
1005 #endif
1006   if(mod->ids) {
1007     /* This is a rearrangement */
1008     /* We have:
1009      * - vec[], the current layout
1010      * - ins, pointing into vec
1011      * - mod->tracks[], a subset of vec[] which is to be moved
1012      *
1013      * ins is the insertion point BUT it is in terms of the whole
1014      * array, i.e. before mod->tracks[] have been removed.  The first
1015      * step then is to remove everything in mod->tracks[] and adjust
1016      * ins downwards as necessary.
1017      */
1018     /* First zero out anything that's moved */
1019     int before_ins = 0;
1020     for(int n = 0; n < nvec; ++n) {
1021       if(playlist_drop_is_moved(mod, n)) {
1022         vec[n] = NULL;
1023         if(n < ins)
1024           ++before_ins;
1025       }
1026     }
1027     /* Now collapse down the array */
1028     int i = 0;
1029     for(int n = 0; n < nvec; ++n) {
1030       if(vec[n])
1031         vec[i++] = vec[n];
1032     }
1033     assert(i + mod->ntracks == nvec);
1034     nvec = i;
1035     /* Adjust the insertion point to take account of things moved from before
1036      * it */
1037     ins -= before_ins;
1038     /* The effect is now the same as an insertion */
1039   }
1040   /* This is (now) an insertion */
1041   nnewvec = nvec + mod->ntracks;
1042   newvec = xcalloc(nnewvec, sizeof (char *));
1043   memcpy(newvec, vec,
1044          ins * sizeof (char *));
1045   memcpy(newvec + ins, mod->tracks,
1046          mod->ntracks * sizeof (char *));
1047   memcpy(newvec + ins + mod->ntracks, vec + ins,
1048          (nvec - ins) * sizeof (char *));
1049   disorder_eclient_playlist_set(client, playlist_modify_updated, mod->playlist,
1050                                 newvec, nnewvec, mod);
1051 }
1052
1053 /* Playlist editor right-click menu ---------------------------------------- */
1054
1055 /** @brief Called to determine whether the playlist is playable */
1056 static int playlist_playall_sensitive(void attribute((unused)) *extra) {
1057   /* If there's no playlist obviously we can't play it */
1058   if(!playlist_picker_selected)
1059     return FALSE;
1060   /* If it's empty we can't play it */
1061   if(!ql_playlist.q)
1062     return FALSE;
1063   /* Otherwise we can */
1064   return TRUE;
1065 }
1066
1067 /** @brief Called to play the selected playlist */
1068 static void playlist_playall_activate(GtkMenuItem attribute((unused)) *menuitem,
1069                                       gpointer attribute((unused)) user_data) {
1070   if(!playlist_picker_selected)
1071     return;
1072   /* Re-use the menu-based activation callback */
1073   disorder_eclient_playlist_get(client, playlist_menu_received_content,
1074                                 playlist_picker_selected, NULL);
1075 }
1076
1077 /** @brief Called to determine whether the playlist is playable */
1078 static int playlist_remove_sensitive(void attribute((unused)) *extra) {
1079   /* If there's no playlist obviously we can't remove from it */
1080   if(!playlist_picker_selected)
1081     return FALSE;
1082   /* If no tracks are selected we cannot remove them */
1083   if(!gtk_tree_selection_count_selected_rows(ql_playlist.selection))
1084     return FALSE;
1085   /* We're good to go */
1086   return TRUE;
1087 }
1088
1089 /** @brief Called to remove the selected playlist */
1090 static void playlist_remove_activate(GtkMenuItem attribute((unused)) *menuitem,
1091                                      gpointer attribute((unused)) user_data) {
1092   if(!playlist_picker_selected)
1093     return;
1094   struct playlist_modify_data *mod = xmalloc(sizeof *mod);
1095
1096   mod->playlist = playlist_picker_selected;
1097   mod->modify = playlist_remove_modify;
1098   disorder_eclient_playlist_lock(client, playlist_modify_locked,
1099                                  mod->playlist, mod);
1100 }
1101
1102 static void playlist_remove_modify(struct playlist_modify_data *mod,
1103                                    int attribute((unused)) nvec, char **vec) {
1104   GtkTreeIter iter[1];
1105   gboolean it = gtk_tree_model_get_iter_first(GTK_TREE_MODEL(ql_playlist.store),
1106                                               iter);
1107   int n = 0, m = 0;
1108   while(it) {
1109     if(!gtk_tree_selection_iter_is_selected(ql_playlist.selection, iter))
1110       vec[m++] = vec[n++];
1111     else
1112       n++;
1113     it = gtk_tree_model_iter_next(GTK_TREE_MODEL(ql_playlist.store), iter);
1114   }
1115   disorder_eclient_playlist_set(client, playlist_modify_updated, mod->playlist,
1116                                 vec, m, mod);
1117 }
1118
1119 /* Playlists window --------------------------------------------------------- */
1120
1121 /** @brief Pop up the playlists window
1122  *
1123  * Called when the playlists menu item is selected
1124  */
1125 void playlist_window_create(gpointer attribute((unused)) callback_data,
1126                             guint attribute((unused)) callback_action,
1127                             GtkWidget attribute((unused)) *menu_item) {
1128   /* If the window already exists, raise it */
1129   if(playlist_window) {
1130     gtk_window_present(GTK_WINDOW(playlist_window));
1131     return;
1132   }
1133   /* Create the window */
1134   playlist_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
1135   gtk_widget_set_style(playlist_window, tool_style);
1136   g_signal_connect(playlist_window, "destroy",
1137                    G_CALLBACK(playlist_window_destroyed), &playlist_window);
1138   gtk_window_set_title(GTK_WINDOW(playlist_window), "Playlists Management");
1139   /* TODO loads of this is very similar to (copied from!) users.c - can we
1140    * de-dupe? */
1141   /* Keyboard shortcuts */
1142   g_signal_connect(playlist_window, "key-press-event",
1143                    G_CALLBACK(playlist_window_keypress), 0);
1144   /* default size is too small */
1145   gtk_window_set_default_size(GTK_WINDOW(playlist_window), 640, 320);
1146
1147   GtkWidget *hbox = gtk_hbox_new(FALSE, 0);
1148   gtk_box_pack_start(GTK_BOX(hbox), playlist_picker_create(),
1149                      FALSE/*expand*/, FALSE, 0);
1150   gtk_box_pack_start(GTK_BOX(hbox), gtk_event_box_new(),
1151                      FALSE/*expand*/, FALSE, 2);
1152   gtk_box_pack_start(GTK_BOX(hbox), playlists_editor_create(),
1153                      TRUE/*expand*/, TRUE/*fill*/, 0);
1154
1155   gtk_container_add(GTK_CONTAINER(playlist_window), frame_widget(hbox, NULL));
1156   gtk_widget_show_all(playlist_window);
1157 }
1158
1159 /** @brief Keypress handler */
1160 static gboolean playlist_window_keypress(GtkWidget attribute((unused)) *widget,
1161                                          GdkEventKey *event,
1162                                          gpointer attribute((unused)) user_data) {
1163   if(event->state)
1164     return FALSE;
1165   switch(event->keyval) {
1166   case GDK_Escape:
1167     gtk_widget_destroy(playlist_window);
1168     return TRUE;
1169   default:
1170     return FALSE;
1171   }
1172 }
1173
1174 /** @brief Called when the playlist window is destroyed */
1175 static void playlist_window_destroyed(GtkWidget attribute((unused)) *widget,
1176                                       GtkWidget **widget_pointer) {
1177   destroy_queuelike(&ql_playlist);
1178   playlist_picker_destroy();
1179   *widget_pointer = NULL;
1180 }
1181
1182 /** @brief Initialize playlist support */
1183 void playlists_init(void) {
1184   /* We re-get all playlists upon any change... */
1185   event_register("playlist-created", playlist_list_update, 0);
1186   event_register("playlist-deleted", playlist_list_update, 0);
1187   /* ...and on reconnection */
1188   event_register("log-connected", playlist_list_update, 0);
1189   /* ...and from time to time */
1190   event_register("periodic-slow", playlist_list_update, 0);
1191   /* ...and at startup */
1192   playlist_list_update(0, 0, 0);
1193
1194   /* Update the playlists menu when the set of playlists changes */
1195   event_register("playlists-updated", playlist_menu_changed, 0);
1196   /* Update the new-playlist OK button when the set of playlists changes */
1197   event_register("playlists-updated", playlist_new_changed, 0);
1198   /* Update the list of playlists in the edit window when the set changes */
1199   event_register("playlists-updated", playlist_picker_fill, 0);
1200   /* Update the displayed playlist when it is modified */
1201   event_register("playlist-modified", playlist_editor_fill, 0);
1202 }
1203
1204 #endif
1205
1206 /*
1207 Local Variables:
1208 c-basic-offset:2
1209 comment-column:40
1210 fill-column:79
1211 indent-tabs-mode:nil
1212 End:
1213 */