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 static void playlist_list_received_playlists(void *v,
  44                                              const char *err,
  45                                              int nvec, char **vec);
  46 static void playlist_editor_fill(const char *event,
  47                                  void *eventdata,
  48                                  void *callbackdata);
  49 static int playlist_playall_sensitive(void *extra);
  50 static void playlist_playall_activate(GtkMenuItem *menuitem,
  51                                       gpointer user_data);
  52 static int playlist_remove_sensitive(void *extra) ;
  53 static void playlist_remove_activate(GtkMenuItem *menuitem,
  54                                      gpointer user_data);
  55 static void playlist_new_locked(void *v, const char *err);
  56 static void playlist_new_retrieved(void *v, const char *err,
  57                                    int nvec,
  58                                    char **vec);
  59 static void playlist_new_created(void *v, const char *err);
  60 static void playlist_new_unlocked(void *v, const char *err);
  61 static void playlist_new_entry_edited(GtkEditable *editable,
  62                                       gpointer user_data);
  63 static void playlist_new_button_toggled(GtkToggleButton *tb,
  64                                         gpointer userdata);
  65 static void playlist_new_changed(const char *event,
  66                                  void *eventdata,
  67                                  void *callbackdata);
  68 static const char *playlist_new_valid(void);
  69 static void playlist_new_details(char **namep,
  70                                  char **fullnamep,
  71                                  gboolean *sharedp,
  72                                  gboolean *publicp,
  73                                  gboolean *privatep);
  74 static void playlist_new_ok(GtkButton *button,
  75                             gpointer userdata);
  76 static void playlist_new_cancel(GtkButton *button,
  77                                 gpointer userdata);
  78 static void playlists_editor_received_tracks(void *v,
  79                                              const char *err,
  80                                              int nvec, char **vec);
  81 static void playlist_window_destroyed(GtkWidget *widget,
  82                                       GtkWidget **widget_pointer);
  83 static gboolean playlist_window_keypress(GtkWidget *widget,
  84                                          GdkEventKey *event,
  85                                          gpointer user_data);
  86 static int playlistcmp(const void *ap, const void *bp);
  87 static void playlist_modify_locked(void *v, const char *err);
  88 void playlist_modify_retrieved(void *v, const char *err,
  89                                int nvec,
  90                                char **vec);
  91 static void playlist_modify_updated(void *v, const char *err);
  92 static void playlist_modify_unlocked(void *v, const char *err);
  93 static void playlist_drop(struct queuelike *ql,
  94                           int ntracks,
  95                           char **tracks, char **ids,
  96                           struct queue_entry *after_me);
  97 struct playlist_modify_data;
  98 static void playlist_drop_modify(struct playlist_modify_data *mod,
  99                                  int nvec, char **vec);
 100 static void playlist_remove_modify(struct playlist_modify_data *mod,
 101                                  int nvec, char **vec);
 102 static gboolean playlist_new_keypress(GtkWidget *widget,
 103                                       GdkEventKey *event,
 104                                       gpointer user_data);
 105 static gboolean playlist_picker_keypress(GtkWidget *widget,
 106                                          GdkEventKey *event,
 107                                          gpointer user_data);
 108 static void playlist_editor_button_toggled(GtkToggleButton *tb,
 109                                            gpointer userdata);
 110 static void playlist_editor_set_buttons(const char *event,
 111                                         void *eventdata,
 112                                         void *callbackdata);
 113 static void playlist_editor_got_share(void *v,
 114                                       const char *err,
 115                                       const char *value);
 116 static void playlist_editor_share_set(void *v, const char *err);
 117 static void playlist_picker_update_section(const char *title, const char *key,
 118                                            int start, int end);
 119 static gboolean playlist_picker_find(GtkTreeIter *parent,
 120                                      const char *title, const char *key,
 121                                      GtkTreeIter iter[1],
 122                                      gboolean create);
 123 static void playlist_picker_delete_obsolete(GtkTreeIter parent[1],
 124                                             char **exists,
 125                                             int nexists);
 126 static gboolean playlist_picker_button(GtkWidget *widget,
 127                                        GdkEventButton *event,
 128                                        gpointer user_data);
 129 static gboolean playlist_editor_keypress(GtkWidget *widget,
 130                                          GdkEventKey *event,
 131                                          gpointer user_data);
 132 static void playlist_editor_ok(GtkButton *button, gpointer userdata);
 133 static void playlist_editor_help(GtkButton *button, gpointer userdata);
 134
 135 /** @brief Playlist editing window */
 136 static GtkWidget *playlist_window;
 137
 138 /** @brief Columns for the playlist editor */
 139 static const struct queue_column playlist_columns[] = {
 140   { "Artist", column_namepart, "artist", COL_EXPAND|COL_ELLIPSIZE },
 141   { "Album",  column_namepart, "album",  COL_EXPAND|COL_ELLIPSIZE },
 142   { "Title",  column_namepart, "title",  COL_EXPAND|COL_ELLIPSIZE },
 143 };
 144
 145 /** @brief Pop-up menu for playlist editor
 146  *
 147  * Status:
 148  * - track properties works but, bizarrely, raises the main window
 149  * - play track works
 150  * - play playlist works
 151  * - select/deselect all work
 152  */
 153 static struct menuitem playlist_menuitems[] = {
 154   { "Track properties", GTK_STOCK_PROPERTIES, ql_properties_activate, ql_properties_sensitive, 0, 0 },
 155   { "Play track", GTK_STOCK_MEDIA_PLAY, ql_play_activate, ql_play_sensitive, 0, 0 },
 156   { "Play playlist", NULL, playlist_playall_activate, playlist_playall_sensitive, 0, 0 },
 157   { "Remove track from playlist", GTK_STOCK_DELETE, playlist_remove_activate, playlist_remove_sensitive, 0, 0 },
 158   { "Select all tracks", GTK_STOCK_SELECT_ALL, ql_selectall_activate, ql_selectall_sensitive, 0, 0 },
 159   { "Deselect all tracks", NULL, ql_selectnone_activate, ql_selectnone_sensitive, 0, 0 },
 160 };
 161
 162 static const GtkTargetEntry playlist_targets[] = {
 163   {
 164     PLAYLIST_TRACKS,                    /* drag type */
 165     GTK_TARGET_SAME_WIDGET,             /* rearrangement within a widget */
 166     PLAYLIST_TRACKS_ID                  /* ID value */
 167   },
 168   {
 169     PLAYABLE_TRACKS,                             /* drag type */
 170     GTK_TARGET_SAME_APP|GTK_TARGET_OTHER_WIDGET, /* copying between widgets */
 171     PLAYABLE_TRACKS_ID,                          /* ID value */
 172   },
 173   {
 174     .target = NULL
 175   }
 176 };
 177
 178 /** @brief Queuelike for editing a playlist */
 179 static struct queuelike ql_playlist = {
 180   .name = "playlist",
 181   .columns = playlist_columns,
 182   .ncolumns = sizeof playlist_columns / sizeof *playlist_columns,
 183   .menuitems = playlist_menuitems,
 184   .nmenuitems = sizeof playlist_menuitems / sizeof *playlist_menuitems,
 185   .drop = playlist_drop,
 186   .drag_source_targets = playlist_targets,
 187   .drag_source_actions = GDK_ACTION_MOVE|GDK_ACTION_COPY,
 188   .drag_dest_targets = playlist_targets,
 189   .drag_dest_actions = GDK_ACTION_MOVE|GDK_ACTION_COPY,
 190 };
 191
 192 /* Maintaining the list of playlists ---------------------------------------- */
 193
 194 /** @brief Current list of playlists or NULL */
 195 char **playlists;
 196
 197 /** @brief Count of playlists */
 198 int nplaylists;
 199
 200 /** @brief Schedule an update to the list of playlists
 201  *
 202  * Called periodically and when a playlist is created or deleted.
 203  */
 204 static void playlist_list_update(const char attribute((unused)) *event,
 205                                  void attribute((unused)) *eventdata,
 206                                  void attribute((unused)) *callbackdata) {
 207   disorder_eclient_playlists(client, playlist_list_received_playlists, 0);
 208 }
 209
 210 /** @brief Called with a new list of playlists */
 211 static void playlist_list_received_playlists(void attribute((unused)) *v,
 212                                              const char *err,
 213                                              int nvec, char **vec) {
 214   if(err) {
 215     playlists = 0;
 216     nplaylists = -1;
 217     /* Probably means server does not support playlists */
 218   } else {
 219     playlists = vec;
 220     nplaylists = nvec;
 221     qsort(playlists, nplaylists, sizeof (char *), playlistcmp);
 222   }
 223   /* Tell our consumers */
 224   event_raise("playlists-updated", 0);
 225 }
 226
 227 /** @brief qsort() callback for playlist name comparison */
 228 static int playlistcmp(const void *ap, const void *bp) {
 229   const char *a = *(char **)ap, *b = *(char **)bp;
 230   const char *ad = strchr(a, '.'), *bd = strchr(b, '.');
 231   int c;
 232
 233   /* Group owned playlists by owner */
 234   if(ad && bd) {
 235     const int adn = ad - a, bdn = bd - b;
 236     if((c = strncmp(a, b, adn < bdn ? adn : bdn)))
 237       return c;
 238     /* Lexical order within playlists of a single owner */
 239     return strcmp(ad + 1, bd + 1);
 240   }
 241
 242   /* Owned playlists after shared ones */
 243   if(ad) {
 244     return 1;
 245   } else if(bd) {
 246     return -1;
 247   }
 248
 249   /* Lexical order of shared playlists */
 250   return strcmp(a, b);
 251 }
 252
 253 /* Playlists menu ----------------------------------------------------------- */
 254
 255 static void playlist_menu_playing(void attribute((unused)) *v,
 256                                   const char *err,
 257                                   const char attribute((unused)) *id) {
 258   if(err)
 259     popup_submsg(playlist_window, GTK_MESSAGE_ERROR, err);
 260 }
 261
 262 /** @brief Play received playlist contents
 263  *
 264  * Passed as a completion callback by menu_activate_playlist().
 265  */
 266 static void playlist_menu_received_content(void attribute((unused)) *v,
 267                                            const char *err,
 268                                            int nvec, char **vec) {
 269   if(err) {
 270     popup_submsg(playlist_window, GTK_MESSAGE_ERROR, err);
 271     return;
 272   }
 273   for(int n = 0; n < nvec; ++n)
 274     disorder_eclient_play(client, playlist_menu_playing, vec[n], NULL);
 275 }
 276
 277 /** @brief Called to activate a playlist
 278  *
 279  * Called when the menu item for a playlist is clicked.
 280  */
 281 static void playlist_menu_activate(GtkMenuItem *menuitem,
 282                                    gpointer attribute((unused)) user_data) {
 283   GtkLabel *label = GTK_LABEL(GTK_BIN(menuitem)->child);
 284   const char *playlist = gtk_label_get_text(label);
 285
 286   disorder_eclient_playlist_get(client, playlist_menu_received_content,
 287                                 playlist, NULL);
 288 }
 289
 290 /** @brief Called when the playlists change
 291  *
 292  * Naively refills the menu.  The results might be unsettling if the menu is
 293  * currently open, but this is hopefuly fairly rare.
 294  */
 295 static void playlist_menu_changed(const char attribute((unused)) *event,
 296                                   void attribute((unused)) *eventdata,
 297                                   void attribute((unused)) *callbackdata) {
 298   if(!playlists_menu)
 299     return;                             /* OMG too soon */
 300   GtkMenuShell *menu = GTK_MENU_SHELL(playlists_menu);
 301   while(menu->children)
 302     gtk_container_remove(GTK_CONTAINER(menu), GTK_WIDGET(menu->children->data));
 303   /* NB nplaylists can be -1 as well as 0 */
 304   for(int n = 0; n < nplaylists; ++n) {
 305     GtkWidget *w = gtk_menu_item_new_with_label(playlists[n]);
 306     g_signal_connect(w, "activate", G_CALLBACK(playlist_menu_activate), 0);
 307     gtk_widget_show(w);
 308     gtk_menu_shell_append(menu, w);
 309   }
 310   gtk_widget_set_sensitive(menu_playlists_widget,
 311                            nplaylists > 0);
 312   gtk_widget_set_sensitive(menu_editplaylists_widget,
 313                            nplaylists >= 0);
 314 }
 315
 316 /* Popup to create a new playlist ------------------------------------------- */
 317
 318 /** @brief New-playlist popup */
 319 static GtkWidget *playlist_new_window;
 320
 321 /** @brief Text entry in new-playlist popup */
 322 static GtkWidget *playlist_new_entry;
 323
 324 /** @brief Label for displaying feedback on what's wrong */
 325 static GtkWidget *playlist_new_info;
 326
 327 /** @brief "Shared" radio button */
 328 static GtkWidget *playlist_new_shared;
 329
 330 /** @brief "Public" radio button */
 331 static GtkWidget *playlist_new_public;
 332
 333 /** @brief "Private" radio button */
 334 static GtkWidget *playlist_new_private;
 335
 336 /** @brief Buttons for new-playlist popup */
 337 static struct button playlist_new_buttons[] = {
 338   {
 339     .stock = GTK_STOCK_OK,
 340     .clicked = playlist_new_ok,
 341     .tip = "Create new playlist"
 342   },
 343   {
 344     .stock = GTK_STOCK_CANCEL,
 345     .clicked = playlist_new_cancel,
 346     .tip = "Do not create new playlist"
 347   }
 348 };
 349 #define NPLAYLIST_NEW_BUTTONS (sizeof playlist_new_buttons / sizeof *playlist_new_buttons)
 350
 351 /** @brief Pop up a new window to enter the playlist name and details */
 352 static void playlist_new_playlist(void) {
 353   assert(playlist_new_window == NULL);
 354   playlist_new_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 355   g_signal_connect(playlist_new_window, "destroy",
 356                    G_CALLBACK(gtk_widget_destroyed), &playlist_new_window);
 357   gtk_window_set_title(GTK_WINDOW(playlist_new_window), "Create new playlist");
 358   /* Window will be modal, suppressing access to other windows */
 359   gtk_window_set_modal(GTK_WINDOW(playlist_new_window), TRUE);
 360   gtk_window_set_transient_for(GTK_WINDOW(playlist_new_window),
 361                                GTK_WINDOW(playlist_window));
 362
 363   /* Window contents will use a table (grid) layout */
 364   GtkWidget *table = gtk_table_new(3, 3, FALSE/*!homogeneous*/);
 365
 366   /* First row: playlist name */
 367   gtk_table_attach_defaults(GTK_TABLE(table),
 368                             gtk_label_new("Playlist name"),
 369                             0, 1, 0, 1);
 370   playlist_new_entry = gtk_entry_new();
 371   g_signal_connect(playlist_new_entry, "changed",
 372                    G_CALLBACK(playlist_new_entry_edited), NULL);
 373   gtk_table_attach_defaults(GTK_TABLE(table),
 374                             playlist_new_entry,
 375                             1, 3, 0, 1);
 376
 377   /* Second row: radio buttons to choose type */
 378   playlist_new_shared = gtk_radio_button_new_with_label(NULL, "shared");
 379   playlist_new_public
 380     = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(playlist_new_shared),
 381                                                   "public");
 382   playlist_new_private
 383     = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(playlist_new_shared),
 384                                                   "private");
 385   g_signal_connect(playlist_new_shared, "toggled",
 386                    G_CALLBACK(playlist_new_button_toggled), NULL);
 387   g_signal_connect(playlist_new_public, "toggled",
 388                    G_CALLBACK(playlist_new_button_toggled), NULL);
 389   g_signal_connect(playlist_new_private, "toggled",
 390                    G_CALLBACK(playlist_new_button_toggled), NULL);
 391   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_shared, 0, 1, 1, 2);
 392   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_public, 1, 2, 1, 2);
 393   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_private, 2, 3, 1, 2);
 394
 395   /* Third row: info bar saying why not */
 396   playlist_new_info = gtk_label_new("");
 397   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_info,
 398                             0, 3, 2, 3);
 399
 400   /* Fourth row: ok/cancel buttons */
 401   GtkWidget *hbox = create_buttons_box(playlist_new_buttons,
 402                                        NPLAYLIST_NEW_BUTTONS,
 403                                        gtk_hbox_new(FALSE, 0));
 404   gtk_table_attach_defaults(GTK_TABLE(table), hbox, 0, 3, 3, 4);
 405
 406   gtk_container_add(GTK_CONTAINER(playlist_new_window),
 407                     frame_widget(table, NULL));
 408
 409   /* Set initial state of OK button */
 410   playlist_new_changed(0,0,0);
 411
 412   g_signal_connect(playlist_new_window, "key-press-event",
 413                    G_CALLBACK(playlist_new_keypress), 0);
 414
 415   /* Display the window */
 416   gtk_widget_show_all(playlist_new_window);
 417 }
 418
 419 /** @brief Keypress handler */
 420 static gboolean playlist_new_keypress(GtkWidget attribute((unused)) *widget,
 421                                       GdkEventKey *event,
 422                                       gpointer attribute((unused)) user_data) {
 423   if(event->state)
 424     return FALSE;
 425   switch(event->keyval) {
 426   case GDK_Return:
 427     playlist_new_ok(NULL, NULL);
 428     return TRUE;
 429   case GDK_Escape:
 430     gtk_widget_destroy(playlist_new_window);
 431     return TRUE;
 432   default:
 433     return FALSE;
 434   }
 435 }
 436
 437 /** @brief Called when 'ok' is clicked in new-playlist popup */
 438 static void playlist_new_ok(GtkButton attribute((unused)) *button,
 439                             gpointer attribute((unused)) userdata) {
 440   if(playlist_new_valid())
 441     return;
 442   gboolean shared, public, private;
 443   char *name, *fullname;
 444   playlist_new_details(&name, &fullname, &shared, &public, &private);
 445
 446   /* We need to:
 447    * - lock the playlist
 448    * - check it doesn't exist
 449    * - set sharing (which will create it empty
 450    * - unlock it
 451    *
 452    * TODO we should freeze the window while this is going on to stop a second
 453    * click.
 454    */
 455   disorder_eclient_playlist_lock(client, playlist_new_locked, fullname,
 456                                  fullname);
 457 }
 458
 459 /** @brief Called when the proposed new playlist has been locked */
 460 static void playlist_new_locked(void *v, const char *err) {
 461   char *fullname = v;
 462   if(err) {
 463     popup_submsg(playlist_window, GTK_MESSAGE_ERROR, err);
 464     return;
 465   }
 466   disorder_eclient_playlist_get(client, playlist_new_retrieved,
 467                                 fullname, fullname);
 468 }
 469
 470 /** @brief Called when the proposed new playlist's contents have been retrieved
 471  *
 472  * ...or rather, normally, when it's been reported that it does not exist.
 473  */
 474 static void playlist_new_retrieved(void *v, const char *err,
 475                                    int nvec,
 476                                    char attribute((unused)) **vec) {
 477   char *fullname = v;
 478   if(!err && nvec != -1)
 479     /* A rare case but not in principle impossible */
 480     err = "A playlist with that name already exists.";
 481   if(err) {
 482     popup_submsg(playlist_window, GTK_MESSAGE_ERROR, err);
 483     disorder_eclient_playlist_unlock(client, playlist_new_unlocked, fullname);
 484     return;
 485   }
 486   gboolean shared, public, private;
 487   playlist_new_details(0, 0, &shared, &public, &private);
 488   disorder_eclient_playlist_set_share(client, playlist_new_created, fullname,
 489                                       public ? "public"
 490                                       : private ? "private"
 491                                       : "shared",
 492                                       fullname);
 493 }
 494
 495 /** @brief Called when the new playlist has been created */
 496 static void playlist_new_created(void attribute((unused)) *v, const char *err) {
 497   if(err) {
 498     popup_submsg(playlist_window, GTK_MESSAGE_ERROR, err);
 499     return;
 500   }
 501   disorder_eclient_playlist_unlock(client, playlist_new_unlocked, NULL);
 502   // TODO arrange for the new playlist to be selected
 503 }
 504
 505 /** @brief Called when the newly created playlist has unlocked */
 506 static void playlist_new_unlocked(void attribute((unused)) *v, const char *err) {
 507   if(err)
 508     popup_submsg(playlist_window, GTK_MESSAGE_ERROR, err);
 509   /* Pop down the creation window */
 510   gtk_widget_destroy(playlist_new_window);
 511 }
 512
 513 /** @brief Called when 'cancel' is clicked in new-playlist popup */
 514 static void playlist_new_cancel(GtkButton attribute((unused)) *button,
 515                                 gpointer attribute((unused)) userdata) {
 516   gtk_widget_destroy(playlist_new_window);
 517 }
 518
 519 /** @brief Called when some radio button in the new-playlist popup changes */
 520 static void playlist_new_button_toggled(GtkToggleButton attribute((unused)) *tb,
 521                                         gpointer attribute((unused)) userdata) {
 522   playlist_new_changed(0,0,0);
 523 }
 524
 525 /** @brief Called when the text entry field in the new-playlist popup changes */
 526 static void playlist_new_entry_edited(GtkEditable attribute((unused)) *editable,
 527                                       gpointer attribute((unused)) user_data) {
 528   playlist_new_changed(0,0,0);
 529 }
 530
 531 /** @brief Called to update new playlist window state
 532  *
 533  * This is called whenever one the text entry or radio buttons changed, and
 534  * also when the set of known playlists changes.  It determines whether the new
 535  * playlist would be creatable and sets the sensitivity of the OK button
 536  * and info display accordingly.
 537  */
 538 static void playlist_new_changed(const char attribute((unused)) *event,
 539                                  void attribute((unused)) *eventdata,
 540                                  void attribute((unused)) *callbackdata) {
 541   if(!playlist_new_window)
 542     return;
 543   const char *reason = playlist_new_valid();
 544   gtk_widget_set_sensitive(playlist_new_buttons[0].widget,
 545                            !reason);
 546   gtk_label_set_text(GTK_LABEL(playlist_new_info), reason);
 547 }
 548
 549 /** @brief Test whether the new-playlist window settings are valid
 550  * @return NULL on success or an error string if not
 551  */
 552 static const char *playlist_new_valid(void) {
 553   gboolean shared, public, private;
 554   char *name, *fullname;
 555   playlist_new_details(&name, &fullname, &shared, &public, &private);
 556   if(!(shared || public || private))
 557     return "No type set.";
 558   if(!*name)
 559     return "";
 560   /* See if the result is valid */
 561   if(!valid_username(name)
 562      || playlist_parse_name(fullname, NULL, NULL))
 563     return "Not a valid playlist name.";
 564   /* See if the result clashes with an existing name.  This is not a perfect
 565    * check, the playlist might be created after this point but before we get a
 566    * chance to disable the "OK" button.  However when we try to create the
 567    * playlist we will first try to retrieve it, with a lock held, so we
 568    * shouldn't end up overwriting anything. */
 569   for(int n = 0; n < nplaylists; ++n)
 570     if(!strcmp(playlists[n], fullname)) {
 571       if(shared)
 572         return "A shared playlist with that name already exists.";
 573       else
 574         return "You already have a playlist with that name.";
 575     }
 576   /* As far as we can tell creation would work */
 577   return NULL;
 578 }
 579
 580 /** @brief Get entered new-playlist details
 581  * @param namep Where to store entered name (or NULL)
 582  * @param fullnamep Where to store computed full name (or NULL)
 583  * @param sharedp Where to store 'shared' flag (or NULL)
 584  * @param publicp Where to store 'public' flag (or NULL)
 585  * @param privatep Where to store 'private' flag (or NULL)
 586  */
 587 static void playlist_new_details(char **namep,
 588                                  char **fullnamep,
 589                                  gboolean *sharedp,
 590                                  gboolean *publicp,
 591                                  gboolean *privatep) {
 592   gboolean shared, public, private;
 593   g_object_get(playlist_new_shared, "active", &shared, (char *)NULL);
 594   g_object_get(playlist_new_public, "active", &public, (char *)NULL);
 595   g_object_get(playlist_new_private, "active", &private, (char *)NULL);
 596   char *gname = gtk_editable_get_chars(GTK_EDITABLE(playlist_new_entry),
 597                                        0, -1); /* name owned by calle */
 598   char *name = xstrdup(gname);
 599   g_free(gname);
 600   if(sharedp) *sharedp = shared;
 601   if(publicp) *publicp = public;
 602   if(privatep) *privatep = private;
 603   if(namep) *namep = name;
 604   if(fullnamep) {
 605     if(shared) *fullnamep = name;
 606     else byte_xasprintf(fullnamep, "%s.%s", config->username, name);
 607   }
 608 }
 609
 610 /* Playlist picker ---------------------------------------------------------- */
 611
 612 /** @brief Delete button */
 613 static GtkWidget *playlist_picker_delete_button;
 614
 615 /** @brief Tree model for list of playlists
 616  *
 617  * This has two columns:
 618  * - column 0 will be the display name
 619  * - column 1 will be the sort key/playlist name (and will not be displayed)
 620  */
 621 static GtkTreeStore *playlist_picker_list;
 622
 623 /** @brief Selection for list of playlists */
 624 static GtkTreeSelection *playlist_picker_selection;
 625
 626 /** @brief Currently selected playlist */
 627 static const char *playlist_picker_selected;
 628
 629 /** @brief (Re-)populate the playlist picker tree model */
 630 static void playlist_picker_fill(const char attribute((unused)) *event,
 631                                  void attribute((unused)) *eventdata,
 632                                  void attribute((unused)) *callbackdata) {
 633   if(!playlist_window)
 634     return;
 635   if(!playlist_picker_list)
 636     playlist_picker_list = gtk_tree_store_new(2, G_TYPE_STRING, G_TYPE_STRING);
 637   /* We will accumulate a list of all the sections that exist */
 638   char **sections = xcalloc(nplaylists, sizeof (char *));
 639   int nsections = 0;
 640   /* Make sure shared playlists are there */
 641   int start = 0, end;
 642   for(end = start; end < nplaylists && !strchr(playlists[end], '.'); ++end)
 643     ;
 644   if(start != end) {
 645     playlist_picker_update_section("Shared playlists", "",
 646                                    start, end);
 647     sections[nsections++] = (char *)"";
 648   }
 649   /* Make sure owned playlists are there */
 650   while((start = end) < nplaylists) {
 651     const int nl = strchr(playlists[start], '.') - playlists[start];
 652     char *name = xstrndup(playlists[start], nl);
 653     for(end = start;
 654         end < nplaylists
 655           && playlists[end][nl] == '.'
 656           && !strncmp(playlists[start], playlists[end], nl);
 657         ++end)
 658       ;
 659     playlist_picker_update_section(name, name, start, end);
 660     sections[nsections++] = name;
 661   }
 662   /* Delete obsolete sections */
 663   playlist_picker_delete_obsolete(NULL, sections, nsections);
 664 }
 665
 666 /** @brief Update a section in the picker tree model
 667  * @param title Display name of section
 668  * @param key Key to search for
 669  * @param start First entry in @ref playlists
 670  * @param end Past last entry in @ref playlists
 671  */
 672 static void playlist_picker_update_section(const char *title, const char *key,
 673                                            int start, int end) {
 674   /* Find the section, creating it if necessary */
 675   GtkTreeIter section_iter[1];
 676   playlist_picker_find(NULL, title, key, section_iter, TRUE);
 677   /* Add missing rows */
 678   for(int n = start; n < end; ++n) {
 679     GtkTreeIter child[1];
 680     char *name;
 681     if((name = strchr(playlists[n], '.')))
 682       ++name;
 683     else
 684       name = playlists[n];
 685     playlist_picker_find(section_iter,
 686                          name, playlists[n],
 687                          child,
 688                          TRUE);
 689   }
 690   /* Delete anything that shouldn't exist. */
 691   playlist_picker_delete_obsolete(section_iter, playlists + start, end - start);
 692 }
 693
 694 /** @brief Find and maybe create a row in the picker tree model
 695  * @param parent Parent iterator (or NULL for top level)
 696  * @param title Display name of section
 697  * @param key Key to search for
 698  * @param iter Iterator to point at key
 699  * @param create Whether to create the row
 700  * @return TRUE if key exists else FALSE
 701  *
 702  * If the @p key exists then @p iter will point to it and TRUE will be
 703  * returned.
 704  *
 705  * If the @p key does not exist and @p create is TRUE then it will be created.
 706  * @p iter wil point to it and TRUE will be returned.
 707  *
 708  * If the @p key does not exist and @p create is FALSE then FALSE will be
 709  * returned.
 710  */
 711 static gboolean playlist_picker_find(GtkTreeIter *parent,
 712                                      const char *title,
 713                                      const char *key,
 714                                      GtkTreeIter iter[1],
 715                                      gboolean create) {
 716   gchar *candidate;
 717   GtkTreeIter next[1];
 718   gboolean it;
 719   int row = 0;
 720
 721   it = gtk_tree_model_iter_children(GTK_TREE_MODEL(playlist_picker_list),
 722                                     next,
 723                                     parent);
 724   while(it) {
 725     /* Find the value at row 'next' */
 726     gtk_tree_model_get(GTK_TREE_MODEL(playlist_picker_list),
 727                        next,
 728                        1, &candidate,
 729                        -1);
 730     /* See how it compares with @p key */
 731     int c = strcmp(key, candidate);
 732     g_free(candidate);
 733     if(!c) {
 734       *iter = *next;
 735       return TRUE;                      /* we found our key */
 736     }
 737     if(c < 0) {
 738       /* @p key belongs before row 'next' */
 739       if(create) {
 740         gtk_tree_store_insert_with_values(playlist_picker_list,
 741                                           iter,
 742                                           parent,
 743                                           row,     /* insert here */
 744                                           0, title, 1, key, -1);
 745         return TRUE;
 746       } else
 747         return FALSE;
 748       ++row;
 749     }
 750     it = gtk_tree_model_iter_next(GTK_TREE_MODEL(playlist_picker_list), next);
 751   }
 752   /* We have reached the end and not found a row that should be later than @p
 753    * key. */
 754   if(create) {
 755     gtk_tree_store_insert_with_values(playlist_picker_list,
 756                                       iter,
 757                                       parent,
 758                                       INT_MAX, /* insert at end */
 759                                       0, title, 1, key, -1);
 760     return TRUE;
 761   } else
 762     return FALSE;
 763 }
 764
 765 /** @brief Delete obsolete rows
 766  * @param parent Parent or NULL
 767  * @param exists List of rows that should exist (by key)
 768  * @param nexists Length of @p exists
 769  */
 770 static void playlist_picker_delete_obsolete(GtkTreeIter parent[1],
 771                                             char **exists,
 772                                             int nexists) {
 773   /* Delete anything that shouldn't exist. */
 774   GtkTreeIter iter[1];
 775   gboolean it = gtk_tree_model_iter_children(GTK_TREE_MODEL(playlist_picker_list),
 776                                              iter,
 777                                              parent);
 778   while(it) {
 779     /* Find the value at row 'next' */
 780     gchar *candidate;
 781     gtk_tree_model_get(GTK_TREE_MODEL(playlist_picker_list),
 782                        iter,
 783                        1, &candidate,
 784                        -1);
 785     gboolean found = FALSE;
 786     for(int n = 0; n < nexists; ++n)
 787       if((found = !strcmp(candidate, exists[n])))
 788         break;
 789     if(!found)
 790       it = gtk_tree_store_remove(playlist_picker_list, iter);
 791     else
 792       it = gtk_tree_model_iter_next(GTK_TREE_MODEL(playlist_picker_list),
 793                                     iter);
 794     g_free(candidate);
 795   }
 796 }
 797
 798 /** @brief Called when the selection might have changed */
 799 static void playlist_picker_selection_changed(GtkTreeSelection attribute((unused)) *treeselection,
 800                                               gpointer attribute((unused)) user_data) {
 801   GtkTreeIter iter;
 802   char *gselected, *selected;
 803
 804   /* Identify the current selection */
 805   if(gtk_tree_selection_get_selected(playlist_picker_selection, 0, &iter)
 806      && gtk_tree_store_iter_depth(playlist_picker_list, &iter) > 0) {
 807     gtk_tree_model_get(GTK_TREE_MODEL(playlist_picker_list), &iter,
 808                        1, &gselected, -1);
 809     selected = xstrdup(gselected);
 810     g_free(gselected);
 811   } else
 812     selected = 0;
 813   /* Set button sensitivity according to the new state */
 814   int deletable = FALSE;
 815   if(selected) {
 816     if(strchr(selected, '.')) {
 817       if(!strncmp(selected, config->username, strlen(config->username)))
 818         deletable = TRUE;
 819     } else
 820       deletable = TRUE;
 821   }
 822   gtk_widget_set_sensitive(playlist_picker_delete_button, deletable);
 823   /* Eliminate no-change cases */
 824   if(!selected && !playlist_picker_selected)
 825     return;
 826   if(selected
 827      && playlist_picker_selected
 828      && !strcmp(selected, playlist_picker_selected))
 829     return;
 830   /* Record the new state */
 831   playlist_picker_selected = selected;
 832   /* Re-initalize the queue */
 833   ql_new_queue(&ql_playlist, NULL);
 834   /* Synthesize a playlist-modified to re-initialize the editor etc */
 835   event_raise("playlist-modified", (void *)playlist_picker_selected);
 836 }
 837
 838 /** @brief Called when the 'add' button is pressed */
 839 static void playlist_picker_add(GtkButton attribute((unused)) *button,
 840                                 gpointer attribute((unused)) userdata) {
 841   /* Unselect whatever is selected TODO why?? */
 842   gtk_tree_selection_unselect_all(playlist_picker_selection);
 843   playlist_new_playlist();
 844 }
 845
 846 /** @brief Called when playlist deletion completes */
 847 static void playlists_picker_delete_completed(void attribute((unused)) *v,
 848                                               const char *err) {
 849   if(err)
 850     popup_submsg(playlist_window, GTK_MESSAGE_ERROR, err);
 851 }
 852
 853 /** @brief Called when the 'Delete' button is pressed */
 854 static void playlist_picker_delete(GtkButton attribute((unused)) *button,
 855                                    gpointer attribute((unused)) userdata) {
 856   GtkWidget *yesno;
 857   int res;
 858
 859   if(!playlist_picker_selected)
 860     return;
 861   yesno = gtk_message_dialog_new(GTK_WINDOW(playlist_window),
 862                                  GTK_DIALOG_MODAL,
 863                                  GTK_MESSAGE_QUESTION,
 864                                  GTK_BUTTONS_YES_NO,
 865                                  "Do you really want to delete playlist %s?"
 866                                  " This action cannot be undone.",
 867                                  playlist_picker_selected);
 868   res = gtk_dialog_run(GTK_DIALOG(yesno));
 869   gtk_widget_destroy(yesno);
 870   if(res == GTK_RESPONSE_YES) {
 871     disorder_eclient_playlist_delete(client,
 872                                      playlists_picker_delete_completed,
 873                                      playlist_picker_selected,
 874                                      NULL);
 875   }
 876 }
 877
 878 /** @brief Table of buttons below the playlist list */
 879 static struct button playlist_picker_buttons[] = {
 880   {
 881     GTK_STOCK_ADD,
 882     playlist_picker_add,
 883     "Create a new playlist",
 884     0,
 885     NULL,
 886   },
 887   {
 888     GTK_STOCK_REMOVE,
 889     playlist_picker_delete,
 890     "Delete a playlist",
 891     0,
 892     NULL,
 893   },
 894 };
 895 #define NPLAYLIST_PICKER_BUTTONS (sizeof playlist_picker_buttons / sizeof *playlist_picker_buttons)
 896
 897 /** @brief Create the list of playlists for the edit playlists window */
 898 static GtkWidget *playlist_picker_create(void) {
 899   /* Create the list of playlist and populate it */
 900   playlist_picker_fill(NULL, NULL, NULL);
 901   /* Create the tree view */
 902   GtkWidget *tree = gtk_tree_view_new_with_model(GTK_TREE_MODEL(playlist_picker_list));
 903   /* ...and the renderers for it */
 904   GtkCellRenderer *cr = gtk_cell_renderer_text_new();
 905   GtkTreeViewColumn *col = gtk_tree_view_column_new_with_attributes("Playlist",
 906                                                                     cr,
 907                                                                     "text", 0,
 908                                                                     NULL);
 909   gtk_tree_view_append_column(GTK_TREE_VIEW(tree), col);
 910   /* Get the selection for the view; set its mode; arrange for a callback when
 911    * it changes */
 912   playlist_picker_selected = NULL;
 913   playlist_picker_selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(tree));
 914   gtk_tree_selection_set_mode(playlist_picker_selection, GTK_SELECTION_BROWSE);
 915   g_signal_connect(playlist_picker_selection, "changed",
 916                    G_CALLBACK(playlist_picker_selection_changed), NULL);
 917
 918   /* Create the control buttons */
 919   GtkWidget *buttons = create_buttons_box(playlist_picker_buttons,
 920                                           NPLAYLIST_PICKER_BUTTONS,
 921                                           gtk_hbox_new(FALSE, 1));
 922   playlist_picker_delete_button = playlist_picker_buttons[1].widget;
 923
 924   playlist_picker_selection_changed(NULL, NULL);
 925
 926   /* Buttons live below the list */
 927   GtkWidget *vbox = gtk_vbox_new(FALSE, 0);
 928   gtk_box_pack_start(GTK_BOX(vbox), scroll_widget(tree), TRUE/*expand*/, TRUE/*fill*/, 0);
 929   gtk_box_pack_start(GTK_BOX(vbox), buttons, FALSE/*expand*/, FALSE, 0);
 930
 931   g_signal_connect(tree, "key-press-event",
 932                    G_CALLBACK(playlist_picker_keypress), 0);
 933   g_signal_connect(tree, "button-press-event",
 934                    G_CALLBACK(playlist_picker_button), 0);
 935
 936   return vbox;
 937 }
 938
 939 static gboolean playlist_picker_keypress(GtkWidget attribute((unused)) *widget,
 940                                          GdkEventKey *event,
 941                                          gpointer attribute((unused)) user_data) {
 942   if(event->state)
 943     return FALSE;
 944   switch(event->keyval) {
 945   case GDK_BackSpace:
 946   case GDK_Delete:
 947     playlist_picker_delete(NULL, NULL);
 948     return TRUE;
 949   default:
 950     return FALSE;
 951   }
 952 }
 953
 954 static void playlist_picker_select_activate(GtkMenuItem attribute((unused)) *item,
 955                                             gpointer attribute((unused)) userdata) {
 956   /* nothing */
 957 }
 958
 959 static int playlist_picker_select_sensitive(void *extra) {
 960   GtkTreeIter *iter = extra;
 961   return gtk_tree_store_iter_depth(playlist_picker_list, iter) > 0;
 962 }
 963
 964 static void playlist_picker_play_activate(GtkMenuItem attribute((unused)) *item,
 965                                           gpointer attribute((unused)) userdata) {
 966   /* Re-use the menu-based activation callback */
 967   disorder_eclient_playlist_get(client, playlist_menu_received_content,
 968                                 playlist_picker_selected, NULL);
 969 }
 970
 971 static int playlist_picker_play_sensitive(void *extra) {
 972   GtkTreeIter *iter = extra;
 973   return gtk_tree_store_iter_depth(playlist_picker_list, iter) > 0;
 974 }
 975
 976 static void playlist_picker_remove_activate(GtkMenuItem attribute((unused)) *item,
 977                                             gpointer attribute((unused)) userdata) {
 978   /* Re-use the 'Remove' button' */
 979   playlist_picker_delete(NULL, NULL);
 980 }
 981
 982 static int playlist_picker_remove_sensitive(void *extra) {
 983   GtkTreeIter *iter = extra;
 984   if(gtk_tree_store_iter_depth(playlist_picker_list, iter) > 0) {
 985     if(strchr(playlist_picker_selected, '.')) {
 986       if(!strncmp(playlist_picker_selected, config->username,
 987                   strlen(config->username)))
 988         return TRUE;
 989     } else
 990       return TRUE;
 991   }
 992   return FALSE;
 993 }
 994
 995 /** @brief Pop-up menu for picker */
 996 static struct menuitem playlist_picker_menuitems[] = {
 997   {
 998     "Select playlist",
 999     NULL,
1000     playlist_picker_select_activate,
1001     playlist_picker_select_sensitive,
1002     0,
1003     0
1004   },
1005   {
1006     "Play playlist",
1007     GTK_STOCK_MEDIA_PLAY,
1008     playlist_picker_play_activate,
1009     playlist_picker_play_sensitive,
1010     0,
1011     0
1012   },
1013   {
1014     "Remove playlist",
1015     GTK_STOCK_DELETE,
1016     playlist_picker_remove_activate,
1017     playlist_picker_remove_sensitive,
1018     0,
1019     0
1020   },
1021 };
1022
1023 static gboolean playlist_picker_button(GtkWidget *widget,
1024                                        GdkEventButton *event,
1025                                        gpointer attribute((unused)) user_data) {
1026   if(event->type == GDK_BUTTON_PRESS && event->button == 3) {
1027     static GtkWidget *playlist_picker_menu;
1028
1029     /* Right click press pops up a menu */
1030     ensure_selected(GTK_TREE_VIEW(widget), event);
1031     /* Find the selected row */
1032     GtkTreeIter iter[1];
1033     if(!gtk_tree_selection_get_selected(playlist_picker_selection, 0, iter))
1034       return TRUE;
1035     popup(&playlist_picker_menu, event,
1036           playlist_picker_menuitems,
1037           sizeof playlist_picker_menuitems / sizeof *playlist_picker_menuitems,
1038           iter);
1039     return TRUE;
1040   }
1041   return FALSE;
1042 }
1043
1044 static void playlist_picker_destroy(void) {
1045   playlist_picker_delete_button = NULL;
1046   g_object_unref(playlist_picker_list);
1047   playlist_picker_list = NULL;
1048   playlist_picker_selection = NULL;
1049   playlist_picker_selected = NULL;
1050 }
1051
1052 /* Playlist editor ---------------------------------------------------------- */
1053
1054 static GtkWidget *playlist_editor_shared;
1055 static GtkWidget *playlist_editor_public;
1056 static GtkWidget *playlist_editor_private;
1057 static int playlist_editor_setting_buttons;
1058
1059 /** @brief Buttons for the playlist window */
1060 static struct button playlist_editor_buttons[] = {
1061   {
1062     GTK_STOCK_OK,
1063     playlist_editor_ok,
1064     "Close window",
1065     0,
1066     gtk_box_pack_end,
1067   },
1068   {
1069     GTK_STOCK_HELP,
1070     playlist_editor_help,
1071     "Go to manual",
1072     0,
1073     gtk_box_pack_end,
1074   },
1075 };
1076
1077 #define NPLAYLIST_EDITOR_BUTTONS (int)(sizeof playlist_editor_buttons / sizeof *playlist_editor_buttons)
1078
1079 static GtkWidget *playlists_editor_create(void) {
1080   assert(ql_playlist.view == NULL);     /* better not be set up already */
1081
1082   GtkWidget *hbox = gtk_hbox_new(FALSE, 0);
1083   playlist_editor_shared = gtk_radio_button_new_with_label(NULL, "shared");
1084   playlist_editor_public
1085     = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(playlist_editor_shared),
1086                                                   "public");
1087   playlist_editor_private
1088     = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(playlist_editor_shared),
1089                                                   "private");
1090   g_signal_connect(playlist_editor_public, "toggled",
1091                    G_CALLBACK(playlist_editor_button_toggled),
1092                    (void *)"public");
1093   g_signal_connect(playlist_editor_private, "toggled",
1094                    G_CALLBACK(playlist_editor_button_toggled),
1095                    (void *)"private");
1096   gtk_box_pack_start(GTK_BOX(hbox), playlist_editor_shared,
1097                      FALSE/*expand*/, FALSE/*fill*/, 0);
1098   gtk_box_pack_start(GTK_BOX(hbox), playlist_editor_public,
1099                      FALSE/*expand*/, FALSE/*fill*/, 0);
1100   gtk_box_pack_start(GTK_BOX(hbox), playlist_editor_private,
1101                      FALSE/*expand*/, FALSE/*fill*/, 0);
1102   playlist_editor_set_buttons(0,0,0);
1103   create_buttons_box(playlist_editor_buttons,
1104                      NPLAYLIST_EDITOR_BUTTONS,
1105                      hbox);
1106
1107   GtkWidget *vbox = gtk_vbox_new(FALSE, 0);
1108   GtkWidget *view = init_queuelike(&ql_playlist);
1109   gtk_box_pack_start(GTK_BOX(vbox), view,
1110                      TRUE/*expand*/, TRUE/*fill*/, 0);
1111   gtk_box_pack_start(GTK_BOX(vbox), hbox,
1112                      FALSE/*expand*/, FALSE/*fill*/, 0);
1113   g_signal_connect(view, "key-press-event",
1114                    G_CALLBACK(playlist_editor_keypress), 0);
1115   return vbox;
1116 }
1117
1118 static gboolean playlist_editor_keypress(GtkWidget attribute((unused)) *widget,
1119                                          GdkEventKey *event,
1120                                          gpointer attribute((unused)) user_data) {
1121   if(event->state)
1122     return FALSE;
1123   switch(event->keyval) {
1124   case GDK_BackSpace:
1125   case GDK_Delete:
1126     playlist_remove_activate(NULL, NULL);
1127     return TRUE;
1128   default:
1129     return FALSE;
1130   }
1131 }
1132
1133 /** @brief Called when the public/private buttons are set */
1134 static void playlist_editor_button_toggled(GtkToggleButton *tb,
1135                                            gpointer userdata) {
1136   const char *state = userdata;
1137   if(!gtk_toggle_button_get_active(tb)
1138      || !playlist_picker_selected
1139      || playlist_editor_setting_buttons)
1140     return;
1141   disorder_eclient_playlist_set_share(client, playlist_editor_share_set,
1142                                       playlist_picker_selected, state, NULL);
1143 }
1144
1145 static void playlist_editor_share_set(void attribute((unused)) *v,
1146                                       const attribute((unused)) char *err) {
1147   if(err)
1148     popup_submsg(playlist_window, GTK_MESSAGE_ERROR, err);
1149 }
1150
1151 /** @brief Set the editor button state and sensitivity */
1152 static void playlist_editor_set_buttons(const char attribute((unused)) *event,
1153                                         void *eventdata,
1154                                         void attribute((unused)) *callbackdata) {
1155   /* If this event is for a non-selected playlist do nothing */
1156   if(eventdata
1157      && playlist_picker_selected
1158      && strcmp(eventdata, playlist_picker_selected))
1159     return;
1160   if(playlist_picker_selected) {
1161     if(strchr(playlist_picker_selected, '.'))
1162       disorder_eclient_playlist_get_share(client,
1163                                           playlist_editor_got_share,
1164                                           playlist_picker_selected,
1165                                           (void *)playlist_picker_selected);
1166     else
1167       playlist_editor_got_share((void *)playlist_picker_selected, NULL,
1168                                 "shared");
1169   } else
1170     playlist_editor_got_share(NULL, NULL, NULL);
1171 }
1172
1173 /** @brief Called with playlist sharing details */
1174 static void playlist_editor_got_share(void *v,
1175                                       const char *err,
1176                                       const char *value) {
1177   const char *playlist = v;
1178   if(err) {
1179     popup_submsg(playlist_window, GTK_MESSAGE_ERROR, err);
1180     value = NULL;
1181   }
1182   /* Set the currently active button */
1183   ++playlist_editor_setting_buttons;
1184   gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(playlist_editor_shared),
1185                                value && !strcmp(value, "shared"));
1186   gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(playlist_editor_public),
1187                                value && !strcmp(value, "public"));
1188   gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(playlist_editor_private),
1189                                value && !strcmp(value, "private"));
1190   /* Set button sensitivity */
1191   gtk_widget_set_sensitive(playlist_editor_shared, FALSE);
1192   int sensitive = (playlist
1193                    && strchr(playlist, '.')
1194                    && !strncmp(playlist, config->username,
1195                                strlen(config->username)));
1196   gtk_widget_set_sensitive(playlist_editor_public, sensitive);
1197   gtk_widget_set_sensitive(playlist_editor_private, sensitive);
1198   --playlist_editor_setting_buttons;
1199 }
1200
1201 /** @brief (Re-)populate the playlist tree model */
1202 static void playlist_editor_fill(const char attribute((unused)) *event,
1203                                  void *eventdata,
1204                                  void attribute((unused)) *callbackdata) {
1205   const char *modified_playlist = eventdata;
1206   if(!playlist_window)
1207     return;
1208   if(!playlist_picker_selected)
1209     return;
1210   if(!strcmp(playlist_picker_selected, modified_playlist))
1211     disorder_eclient_playlist_get(client, playlists_editor_received_tracks,
1212                                   playlist_picker_selected,
1213                                   (void *)playlist_picker_selected);
1214 }
1215
1216 /** @brief Called with new tracks for the playlist */
1217 static void playlists_editor_received_tracks(void *v,
1218                                              const char *err,
1219                                              int nvec, char **vec) {
1220   const char *playlist = v;
1221   if(err) {
1222     popup_submsg(playlist_window, GTK_MESSAGE_ERROR, err);
1223     return;
1224   }
1225   if(!playlist_picker_selected
1226      || strcmp(playlist, playlist_picker_selected)) {
1227     /* The tracks are for the wrong playlist - something must have changed
1228      * while the fetch command was in flight.  We just ignore this callback,
1229      * the right answer will be requested and arrive in due course. */
1230     return;
1231   }
1232   if(nvec == -1)
1233     /* No such playlist, presumably we'll get a deleted event shortly */
1234     return;
1235   /* Translate the list of tracks into queue entries */
1236   struct queue_entry *newq, **qq = &newq, *qprev = NULL;
1237   hash *h = hash_new(sizeof(int));
1238   for(int n = 0; n < nvec; ++n) {
1239     struct queue_entry *q = xmalloc(sizeof *q);
1240     q->prev = qprev;
1241     q->track = vec[n];
1242     /* Synthesize a unique ID so that the selection survives updates.  Tracks
1243      * can appear more than once in the queue so we can't use raw track names,
1244      * so we add a serial number to the start. */
1245     int *serialp = hash_find(h, vec[n]), serial = serialp ? *serialp : 0;
1246     byte_xasprintf((char **)&q->id, "%d-%s", serial++, vec[n]);
1247     hash_add(h, vec[n], &serial, HASH_INSERT_OR_REPLACE);
1248     *qq = q;
1249     qq = &q->next;
1250     qprev = q;
1251   }
1252   *qq = NULL;
1253   ql_new_queue(&ql_playlist, newq);
1254 }
1255
1256 static void playlist_editor_ok(GtkButton attribute((unused)) *button,
1257                                gpointer attribute((unused)) userdata) {
1258   gtk_widget_destroy(playlist_window);
1259 }
1260
1261 static void playlist_editor_help(GtkButton attribute((unused)) *button,
1262                                  gpointer attribute((unused)) userdata) {
1263   popup_help("playlists.html");
1264 }
1265
1266 /* Playlist mutation -------------------------------------------------------- */
1267
1268 /** @brief State structure for guarded playlist modification
1269  *
1270  * To safely move, insert or delete rows we must:
1271  * - take a lock
1272  * - fetch the playlist
1273  * - verify it's not changed
1274  * - update the playlist contents
1275  * - store the playlist
1276  * - release the lock
1277  *
1278  * The playlist_modify_ functions do just that.
1279  *
1280  * To kick things off create one of these and disorder_eclient_playlist_lock()
1281  * with playlist_modify_locked() as its callback.  @c modify will be called; it
1282  * should disorder_eclient_playlist_set() to set the new state with
1283  * playlist_modify_updated() as its callback.
1284  */
1285 struct playlist_modify_data {
1286   /** @brief Affected playlist */
1287   const char *playlist;
1288   /** @brief Modification function
1289    * @param mod Pointer back to state structure
1290    * @param ntracks Length of playlist
1291    * @param tracks Tracks in playlist
1292    */
1293   void (*modify)(struct playlist_modify_data *mod,
1294                 int ntracks, char **tracks);
1295
1296   /** @brief Number of tracks dropped */
1297   int ntracks;
1298   /** @brief Track names dropped */
1299   char **tracks;
1300   /** @brief Track IDs dropped */
1301   char **ids;
1302   /** @brief Drop after this point */
1303   struct queue_entry *after_me;
1304 };
1305
1306 /** @brief Called with playlist locked
1307  *
1308  * This is the entry point for guarded modification ising @ref
1309  * playlist_modify_data.
1310  */
1311 static void playlist_modify_locked(void *v, const char *err) {
1312   struct playlist_modify_data *mod = v;
1313   if(err) {
1314     popup_submsg(playlist_window, GTK_MESSAGE_ERROR, err);
1315     return;
1316   }
1317   disorder_eclient_playlist_get(client, playlist_modify_retrieved,
1318                                 mod->playlist, mod);
1319 }
1320
1321 /** @brief Called with current playlist contents
1322  * Checks that the playlist is still current and has not changed.
1323  */
1324 void playlist_modify_retrieved(void *v, const char *err,
1325                                int nvec,
1326                                char **vec) {
1327   struct playlist_modify_data *mod = v;
1328   if(err) {
1329     popup_submsg(playlist_window, GTK_MESSAGE_ERROR, err);
1330     disorder_eclient_playlist_unlock(client, playlist_modify_unlocked, NULL);
1331     return;
1332   }
1333   if(nvec < 0
1334      || !playlist_picker_selected
1335      || strcmp(mod->playlist, playlist_picker_selected)) {
1336     disorder_eclient_playlist_unlock(client, playlist_modify_unlocked, NULL);
1337     return;
1338   }
1339   /* We check that the contents haven't changed.  If they have we just abandon
1340    * the operation.  The user will have to try again. */
1341   struct queue_entry *q;
1342   int n;
1343   for(n = 0, q = ql_playlist.q; q && n < nvec; ++n, q = q->next)
1344     if(strcmp(q->track, vec[n]))
1345       break;
1346   if(n != nvec || q != NULL)  {
1347     disorder_eclient_playlist_unlock(client, playlist_modify_unlocked, NULL);
1348     return;
1349   }
1350   mod->modify(mod, nvec, vec);
1351 }
1352
1353 /** @brief Called when the playlist has been updated */
1354 static void playlist_modify_updated(void attribute((unused)) *v,
1355                                     const char *err) {
1356   if(err)
1357     popup_submsg(playlist_window, GTK_MESSAGE_ERROR, err);
1358   disorder_eclient_playlist_unlock(client, playlist_modify_unlocked, NULL);
1359 }
1360
1361 /** @brief Called when the playlist has been unlocked */
1362 static void playlist_modify_unlocked(void attribute((unused)) *v,
1363                                      const char *err) {
1364   if(err)
1365     popup_submsg(playlist_window, GTK_MESSAGE_ERROR, err);
1366 }
1367
1368 /* Drop tracks into a playlist ---------------------------------------------- */
1369
1370 static void playlist_drop(struct queuelike attribute((unused)) *ql,
1371                           int ntracks,
1372                           char **tracks, char **ids,
1373                           struct queue_entry *after_me) {
1374   struct playlist_modify_data *mod = xmalloc(sizeof *mod);
1375
1376   mod->playlist = playlist_picker_selected;
1377   mod->modify = playlist_drop_modify;
1378   mod->ntracks = ntracks;
1379   mod->tracks = tracks;
1380   mod->ids = ids;
1381   mod->after_me = after_me;
1382   disorder_eclient_playlist_lock(client, playlist_modify_locked,
1383                                  mod->playlist, mod);
1384 }
1385
1386 /** @brief Return true if track @p i is in the moved set */
1387 static int playlist_drop_is_moved(struct playlist_modify_data *mod,
1388                                   int i) {
1389   struct queue_entry *q;
1390
1391   /* Find the q corresponding to i, so we can get the ID */
1392   for(q = ql_playlist.q; i; q = q->next, --i)
1393     ;
1394   /* See if track i matches any of the moved set by ID */
1395   for(int n = 0; n < mod->ntracks; ++n)
1396     if(!strcmp(q->id, mod->ids[n]))
1397       return 1;
1398   return 0;
1399 }
1400
1401 static void playlist_drop_modify(struct playlist_modify_data *mod,
1402                                  int nvec, char **vec) {
1403   char **newvec;
1404   int nnewvec;
1405
1406   //fprintf(stderr, "\nplaylist_drop_modify\n");
1407   /* after_me is the queue_entry to insert after, or NULL to insert at the
1408    * beginning (including the case when the playlist is empty) */
1409   //fprintf(stderr, "after_me = %s\n",
1410   //        mod->after_me ? mod->after_me->track : "NULL");
1411   struct queue_entry *q = ql_playlist.q;
1412   int ins = 0;
1413   if(mod->after_me) {
1414     ++ins;
1415     while(q && q != mod->after_me) {
1416       q = q->next;
1417       ++ins;
1418     }
1419   }
1420   /* Now ins is the index to insert at; equivalently, the row to insert before,
1421    * and so equal to nvec to append. */
1422 #if 0
1423   fprintf(stderr, "ins = %d = %s\n",
1424           ins, ins < nvec ? vec[ins] : "NULL");
1425   for(int n = 0; n < nvec; ++n)
1426     fprintf(stderr, "%d: %s %s\n", n, n == ins ? "->" : "  ", vec[n]);
1427   fprintf(stderr, "nvec = %d\n", nvec);
1428 #endif
1429   if(mod->ids) {
1430     /* This is a rearrangement */
1431     /* We have:
1432      * - vec[], the current layout
1433      * - ins, pointing into vec
1434      * - mod->tracks[], a subset of vec[] which is to be moved
1435      *
1436      * ins is the insertion point BUT it is in terms of the whole
1437      * array, i.e. before mod->tracks[] have been removed.  The first
1438      * step then is to remove everything in mod->tracks[] and adjust
1439      * ins downwards as necessary.
1440      */
1441     /* First zero out anything that's moved */
1442     int before_ins = 0;
1443     for(int n = 0; n < nvec; ++n) {
1444       if(playlist_drop_is_moved(mod, n)) {
1445         vec[n] = NULL;
1446         if(n < ins)
1447           ++before_ins;
1448       }
1449     }
1450     /* Now collapse down the array */
1451     int i = 0;
1452     for(int n = 0; n < nvec; ++n) {
1453       if(vec[n])
1454         vec[i++] = vec[n];
1455     }
1456     assert(i + mod->ntracks == nvec);
1457     nvec = i;
1458     /* Adjust the insertion point to take account of things moved from before
1459      * it */
1460     ins -= before_ins;
1461     /* The effect is now the same as an insertion */
1462   }
1463   /* This is (now) an insertion */
1464   nnewvec = nvec + mod->ntracks;
1465   newvec = xcalloc(nnewvec, sizeof (char *));
1466   memcpy(newvec, vec,
1467          ins * sizeof (char *));
1468   memcpy(newvec + ins, mod->tracks,
1469          mod->ntracks * sizeof (char *));
1470   memcpy(newvec + ins + mod->ntracks, vec + ins,
1471          (nvec - ins) * sizeof (char *));
1472   disorder_eclient_playlist_set(client, playlist_modify_updated, mod->playlist,
1473                                 newvec, nnewvec, mod);
1474 }
1475
1476 /* Playlist editor right-click menu ---------------------------------------- */
1477
1478 /** @brief Called to determine whether the playlist is playable */
1479 static int playlist_playall_sensitive(void attribute((unused)) *extra) {
1480   /* If there's no playlist obviously we can't play it */
1481   if(!playlist_picker_selected)
1482     return FALSE;
1483   /* If it's empty we can't play it */
1484   if(!ql_playlist.q)
1485     return FALSE;
1486   /* Otherwise we can */
1487   return TRUE;
1488 }
1489
1490 /** @brief Called to play the selected playlist */
1491 static void playlist_playall_activate(GtkMenuItem attribute((unused)) *menuitem,
1492                                       gpointer attribute((unused)) user_data) {
1493   if(!playlist_picker_selected)
1494     return;
1495   /* Re-use the menu-based activation callback */
1496   disorder_eclient_playlist_get(client, playlist_menu_received_content,
1497                                 playlist_picker_selected, NULL);
1498 }
1499
1500 /** @brief Called to determine whether the playlist is playable */
1501 static int playlist_remove_sensitive(void attribute((unused)) *extra) {
1502   /* If there's no playlist obviously we can't remove from it */
1503   if(!playlist_picker_selected)
1504     return FALSE;
1505   /* If no tracks are selected we cannot remove them */
1506   if(!gtk_tree_selection_count_selected_rows(ql_playlist.selection))
1507     return FALSE;
1508   /* We're good to go */
1509   return TRUE;
1510 }
1511
1512 /** @brief Called to remove the selected playlist */
1513 static void playlist_remove_activate(GtkMenuItem attribute((unused)) *menuitem,
1514                                      gpointer attribute((unused)) user_data) {
1515   if(!playlist_picker_selected)
1516     return;
1517   struct playlist_modify_data *mod = xmalloc(sizeof *mod);
1518
1519   mod->playlist = playlist_picker_selected;
1520   mod->modify = playlist_remove_modify;
1521   disorder_eclient_playlist_lock(client, playlist_modify_locked,
1522                                  mod->playlist, mod);
1523 }
1524
1525 static void playlist_remove_modify(struct playlist_modify_data *mod,
1526                                    int attribute((unused)) nvec, char **vec) {
1527   GtkTreeIter iter[1];
1528   gboolean it = gtk_tree_model_get_iter_first(GTK_TREE_MODEL(ql_playlist.store),
1529                                               iter);
1530   int n = 0, m = 0;
1531   while(it) {
1532     if(!gtk_tree_selection_iter_is_selected(ql_playlist.selection, iter))
1533       vec[m++] = vec[n++];
1534     else
1535       n++;
1536     it = gtk_tree_model_iter_next(GTK_TREE_MODEL(ql_playlist.store), iter);
1537   }
1538   disorder_eclient_playlist_set(client, playlist_modify_updated, mod->playlist,
1539                                 vec, m, mod);
1540 }
1541
1542 /* Playlists window --------------------------------------------------------- */
1543
1544 /** @brief Pop up the playlists window
1545  *
1546  * Called when the playlists menu item is selected
1547  */
1548 void playlist_window_create(gpointer attribute((unused)) callback_data,
1549                             guint attribute((unused)) callback_action,
1550                             GtkWidget attribute((unused)) *menu_item) {
1551   /* If the window already exists, raise it */
1552   if(playlist_window) {
1553     gtk_window_present(GTK_WINDOW(playlist_window));
1554     return;
1555   }
1556   /* Create the window */
1557   playlist_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
1558   gtk_widget_set_style(playlist_window, tool_style);
1559   g_signal_connect(playlist_window, "destroy",
1560                    G_CALLBACK(playlist_window_destroyed), &playlist_window);
1561   gtk_window_set_title(GTK_WINDOW(playlist_window), "Playlists Management");
1562   /* TODO loads of this is very similar to (copied from!) users.c - can we
1563    * de-dupe? */
1564   /* Keyboard shortcuts */
1565   g_signal_connect(playlist_window, "key-press-event",
1566                    G_CALLBACK(playlist_window_keypress), 0);
1567   /* default size is too small */
1568   gtk_window_set_default_size(GTK_WINDOW(playlist_window), 640, 320);
1569
1570   GtkWidget *hbox = gtk_hbox_new(FALSE, 0);
1571   gtk_box_pack_start(GTK_BOX(hbox), playlist_picker_create(),
1572                      FALSE/*expand*/, FALSE, 0);
1573   gtk_box_pack_start(GTK_BOX(hbox), gtk_event_box_new(),
1574                      FALSE/*expand*/, FALSE, 2);
1575   gtk_box_pack_start(GTK_BOX(hbox), playlists_editor_create(),
1576                      TRUE/*expand*/, TRUE/*fill*/, 0);
1577
1578   gtk_container_add(GTK_CONTAINER(playlist_window), frame_widget(hbox, NULL));
1579   gtk_widget_show_all(playlist_window);
1580 }
1581
1582 /** @brief Keypress handler */
1583 static gboolean playlist_window_keypress(GtkWidget attribute((unused)) *widget,
1584                                          GdkEventKey *event,
1585                                          gpointer attribute((unused)) user_data) {
1586   if(event->state)
1587     return FALSE;
1588   switch(event->keyval) {
1589   case GDK_Escape:
1590     gtk_widget_destroy(playlist_window);
1591     return TRUE;
1592   default:
1593     return FALSE;
1594   }
1595 }
1596
1597 /** @brief Called when the playlist window is destroyed */
1598 static void playlist_window_destroyed(GtkWidget attribute((unused)) *widget,
1599                                       GtkWidget **widget_pointer) {
1600   destroy_queuelike(&ql_playlist);
1601   playlist_picker_destroy();
1602   *widget_pointer = NULL;
1603 }
1604
1605 /** @brief Initialize playlist support */
1606 void playlists_init(void) {
1607   /* We re-get all playlists upon any change... */
1608   event_register("playlist-created", playlist_list_update, 0);
1609   event_register("playlist-deleted", playlist_list_update, 0);
1610   /* ...and on reconnection */
1611   event_register("log-connected", playlist_list_update, 0);
1612   /* ...and from time to time */
1613   event_register("periodic-slow", playlist_list_update, 0);
1614   /* ...and at startup */
1615   playlist_list_update(0, 0, 0);
1616
1617   /* Update the playlists menu when the set of playlists changes */
1618   event_register("playlists-updated", playlist_menu_changed, 0);
1619   /* Update the new-playlist OK button when the set of playlists changes */
1620   event_register("playlists-updated", playlist_new_changed, 0);
1621   /* Update the list of playlists in the edit window when the set changes */
1622   event_register("playlists-updated", playlist_picker_fill, 0);
1623   /* Update the displayed playlist when it is modified */
1624   event_register("playlist-modified", playlist_editor_fill, 0);
1625   /* Update the shared/public/etc buttons when a playlist is modified */
1626   event_register("playlist-modified", playlist_editor_set_buttons, 0);
1627 }
1628
1629 /*
1630 Local Variables:
1631 c-basic-offset:2
1632 comment-column:40
1633 fill-column:79
1634 indent-tabs-mode:nil
1635 End:
1636 */