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