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