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