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

   1 /*
   2  * This file is part of DisOrder
   3  * Copyright (C) 2008, 2009 Richard Kettlewell
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  18  * USA
  19  */
  20 /** @file disobedience/playlists.c
  21  * @brief Playlist support for Disobedience
  22  *
  23  * The playlists management window contains:
  24  * - the playlist picker (a list of all playlists) TODO should be a tree!
  25  * - an add button
  26  * - a delete button
  27  * - the playlist editor (a d+d-capable view of the currently picked playlist)
  28  * - a close button   TODO
  29  *
  30  * This file also maintains the playlist menu, allowing playlists to be
  31  * activated from the main window's menu.
  32  *
  33  * Internally we maintain the playlist list, which is just the current list of
  34  * playlists.  Changes to this are reflected in the playlist menu and the
  35  * playlist picker.
  36  *
  37  */
  38 #include "disobedience.h"
  39 #include "queue-generic.h"
  40 #include "popup.h"
  41 #include "validity.h"
  42
  43 #if PLAYLISTS
  44
  45 static void playlist_list_received_playlists(void *v,
  46                                              const char *err,
  47                                              int nvec, char **vec);
  48 static void playlist_editor_fill(const char *event,
  49                                  void *eventdata,
  50                                  void *callbackdata);
  51 static int playlist_playall_sensitive(void *extra);
  52 static void playlist_playall_activate(GtkMenuItem *menuitem,
  53                                       gpointer user_data);
  54 static int playlist_remove_sensitive(void *extra) ;
  55 static void playlist_remove_activate(GtkMenuItem *menuitem,
  56                                      gpointer user_data);
  57 static void playlist_new_locked(void *v, const char *err);
  58 static void playlist_new_retrieved(void *v, const char *err,
  59                                    int nvec,
  60                                    char **vec);
  61 static void playlist_new_created(void *v, const char *err);
  62 static void playlist_new_unlocked(void *v, const char *err);
  63 static void playlist_new_entry_edited(GtkEditable *editable,
  64                                       gpointer user_data);
  65 static void playlist_new_button_toggled(GtkToggleButton *tb,
  66                                         gpointer userdata);
  67 static void playlist_new_changed(const char *event,
  68                                  void *eventdata,
  69                                  void *callbackdata);
  70 static const char *playlist_new_valid(void);
  71 static void playlist_new_details(char **namep,
  72                                  char **fullnamep,
  73                                  gboolean *sharedp,
  74                                  gboolean *publicp,
  75                                  gboolean *privatep);
  76 static void playlist_new_ok(GtkButton *button,
  77                             gpointer userdata);
  78 static void playlist_new_cancel(GtkButton *button,
  79                                 gpointer userdata);
  80 static void playlists_editor_received_tracks(void *v,
  81                                              const char *err,
  82                                              int nvec, char **vec);
  83 static void playlist_window_destroyed(GtkWidget *widget,
  84                                       GtkWidget **widget_pointer);
  85 static gboolean playlist_window_keypress(GtkWidget *widget,
  86                                          GdkEventKey *event,
  87                                          gpointer user_data);
  88 static int playlistcmp(const void *ap, const void *bp);
  89 static void playlist_modify_locked(void *v, const char *err);
  90 void playlist_modify_retrieved(void *v, const char *err,
  91                                int nvec,
  92                                char **vec);
  93 static void playlist_modify_updated(void *v, const char *err);
  94 static void playlist_modify_unlocked(void *v, const char *err);
  95 static void playlist_drop(struct queuelike *ql,
  96                           int ntracks,
  97                           char **tracks, char **ids,
  98                           struct queue_entry *after_me);
  99 struct playlist_modify_data;
 100 static void playlist_drop_modify(struct playlist_modify_data *mod,
 101                                  int nvec, char **vec);
 102 static void playlist_remove_modify(struct playlist_modify_data *mod,
 103                                  int nvec, char **vec);
 104 static gboolean playlist_new_keypress(GtkWidget *widget,
 105                                       GdkEventKey *event,
 106                                       gpointer user_data);
 107 static gboolean playlist_picker_keypress(GtkWidget *widget,
 108                                          GdkEventKey *event,
 109                                          gpointer user_data);
 110 static void playlist_editor_button_toggled(GtkToggleButton *tb,
 111                                            gpointer userdata);
 112 static void playlist_editor_set_buttons(const char *event,
 113                                         void *eventdata,
 114                                         void *callbackdata);
 115 static void playlist_editor_got_share(void *v,
 116                                       const char *err,
 117                                       const char *value);
 118 static void playlist_editor_share_set(void *v, const char *err);
 119
 120 /** @brief Playlist editing window */
 121 static GtkWidget *playlist_window;
 122
 123 /** @brief Columns for the playlist editor */
 124 static const struct queue_column playlist_columns[] = {
 125   { "Artist", column_namepart, "artist", COL_EXPAND|COL_ELLIPSIZE },
 126   { "Album",  column_namepart, "album",  COL_EXPAND|COL_ELLIPSIZE },
 127   { "Title",  column_namepart, "title",  COL_EXPAND|COL_ELLIPSIZE },
 128 };
 129
 130 /** @brief Pop-up menu for playlist editor
 131  *
 132  * Status:
 133  * - track properties works but, bizarrely, raises the main window
 134  * - play track works
 135  * - play playlist works
 136  * - select/deselect all work
 137  */
 138 static struct menuitem playlist_menuitems[] = {
 139   { "Track properties", ql_properties_activate, ql_properties_sensitive, 0, 0 },
 140   { "Play track", ql_play_activate, ql_play_sensitive, 0, 0 },
 141   { "Play playlist", playlist_playall_activate, playlist_playall_sensitive, 0, 0 },
 142   { "Remove track from queue", playlist_remove_activate, playlist_remove_sensitive, 0, 0 },
 143   { "Select all tracks", ql_selectall_activate, ql_selectall_sensitive, 0, 0 },
 144   { "Deselect all tracks", ql_selectnone_activate, ql_selectnone_sensitive, 0, 0 },
 145 };
 146
 147 static const GtkTargetEntry playlist_targets[] = {
 148   {
 149     PLAYLIST_TRACKS,                    /* drag type */
 150     GTK_TARGET_SAME_WIDGET,             /* rearrangement within a widget */
 151     PLAYLIST_TRACKS_ID                  /* ID value */
 152   },
 153   {
 154     PLAYABLE_TRACKS,                             /* drag type */
 155     GTK_TARGET_SAME_APP|GTK_TARGET_OTHER_WIDGET, /* copying between widgets */
 156     PLAYABLE_TRACKS_ID,                          /* ID value */
 157   },
 158   {
 159     .target = NULL
 160   }
 161 };
 162
 163 /** @brief Queuelike for editing a playlist */
 164 static struct queuelike ql_playlist = {
 165   .name = "playlist",
 166   .columns = playlist_columns,
 167   .ncolumns = sizeof playlist_columns / sizeof *playlist_columns,
 168   .menuitems = playlist_menuitems,
 169   .nmenuitems = sizeof playlist_menuitems / sizeof *playlist_menuitems,
 170   .drop = playlist_drop,
 171   .drag_source_targets = playlist_targets,
 172   .drag_source_actions = GDK_ACTION_MOVE|GDK_ACTION_COPY,
 173   .drag_dest_targets = playlist_targets,
 174   .drag_dest_actions = GDK_ACTION_MOVE|GDK_ACTION_COPY,
 175 };
 176
 177 /* Maintaining the list of playlists ---------------------------------------- */
 178
 179 /** @brief Current list of playlists or NULL */
 180 char **playlists;
 181
 182 /** @brief Count of playlists */
 183 int nplaylists;
 184
 185 /** @brief Schedule an update to the list of playlists
 186  *
 187  * Called periodically and when a playlist is created or deleted.
 188  */
 189 static void playlist_list_update(const char attribute((unused)) *event,
 190                                  void attribute((unused)) *eventdata,
 191                                  void attribute((unused)) *callbackdata) {
 192   disorder_eclient_playlists(client, playlist_list_received_playlists, 0);
 193 }
 194
 195 /** @brief Called with a new list of playlists */
 196 static void playlist_list_received_playlists(void attribute((unused)) *v,
 197                                              const char *err,
 198                                              int nvec, char **vec) {
 199   if(err) {
 200     playlists = 0;
 201     nplaylists = -1;
 202     /* Probably means server does not support playlists */
 203   } else {
 204     playlists = vec;
 205     nplaylists = nvec;
 206     qsort(playlists, nplaylists, sizeof (char *), playlistcmp);
 207   }
 208   /* Tell our consumers */
 209   event_raise("playlists-updated", 0);
 210 }
 211
 212 /** @brief qsort() callback for playlist name comparison */
 213 static int playlistcmp(const void *ap, const void *bp) {
 214   const char *a = *(char **)ap, *b = *(char **)bp;
 215   const char *ad = strchr(a, '.'), *bd = strchr(b, '.');
 216   int c;
 217
 218   /* Group owned playlists by owner */
 219   if(ad && bd) {
 220     const int adn = ad - a, bdn = bd - b;
 221     if((c = strncmp(a, b, adn < bdn ? adn : bdn)))
 222       return c;
 223     /* Lexical order within playlists of a single owner */
 224     return strcmp(ad + 1, bd + 1);
 225   }
 226
 227   /* Owned playlists after shared ones */
 228   if(ad) {
 229     return 1;
 230   } else if(bd) {
 231     return -1;
 232   }
 233
 234   /* Lexical order of shared playlists */
 235   return strcmp(a, b);
 236 }
 237
 238 /* Playlists menu ----------------------------------------------------------- */
 239
 240 static void playlist_menu_playing(void attribute((unused)) *v,
 241                                   const char *err) {
 242   if(err)
 243     popup_protocol_error(0, err);
 244 }
 245
 246 /** @brief Play received playlist contents
 247  *
 248  * Passed as a completion callback by menu_activate_playlist().
 249  */
 250 static void playlist_menu_received_content(void attribute((unused)) *v,
 251                                            const char *err,
 252                                            int nvec, char **vec) {
 253   if(err) {
 254     popup_protocol_error(0, err);
 255     return;
 256   }
 257   for(int n = 0; n < nvec; ++n)
 258     disorder_eclient_play(client, vec[n], playlist_menu_playing, NULL);
 259 }
 260
 261 /** @brief Called to activate a playlist
 262  *
 263  * Called when the menu item for a playlist is clicked.
 264  */
 265 static void playlist_menu_activate(GtkMenuItem *menuitem,
 266                                    gpointer attribute((unused)) user_data) {
 267   GtkLabel *label = GTK_LABEL(GTK_BIN(menuitem)->child);
 268   const char *playlist = gtk_label_get_text(label);
 269
 270   disorder_eclient_playlist_get(client, playlist_menu_received_content,
 271                                 playlist, NULL);
 272 }
 273
 274 /** @brief Called when the playlists change
 275  *
 276  * Naively refills the menu.  The results might be unsettling if the menu is
 277  * currently open, but this is hopefuly fairly rare.
 278  */
 279 static void playlist_menu_changed(const char attribute((unused)) *event,
 280                                   void attribute((unused)) *eventdata,
 281                                   void attribute((unused)) *callbackdata) {
 282   if(!playlists_menu)
 283     return;                             /* OMG too soon */
 284   GtkMenuShell *menu = GTK_MENU_SHELL(playlists_menu);
 285   while(menu->children)
 286     gtk_container_remove(GTK_CONTAINER(menu), GTK_WIDGET(menu->children->data));
 287   /* NB nplaylists can be -1 as well as 0 */
 288   for(int n = 0; n < nplaylists; ++n) {
 289     GtkWidget *w = gtk_menu_item_new_with_label(playlists[n]);
 290     g_signal_connect(w, "activate", G_CALLBACK(playlist_menu_activate), 0);
 291     gtk_widget_show(w);
 292     gtk_menu_shell_append(menu, w);
 293   }
 294   gtk_widget_set_sensitive(menu_playlists_widget,
 295                            nplaylists > 0);
 296   gtk_widget_set_sensitive(menu_editplaylists_widget,
 297                            nplaylists >= 0);
 298 }
 299
 300 /* Popup to create a new playlist ------------------------------------------- */
 301
 302 /** @brief New-playlist popup */
 303 static GtkWidget *playlist_new_window;
 304
 305 /** @brief Text entry in new-playlist popup */
 306 static GtkWidget *playlist_new_entry;
 307
 308 /** @brief Label for displaying feedback on what's wrong */
 309 static GtkWidget *playlist_new_info;
 310
 311 /** @brief "Shared" radio button */
 312 static GtkWidget *playlist_new_shared;
 313
 314 /** @brief "Public" radio button */
 315 static GtkWidget *playlist_new_public;
 316
 317 /** @brief "Private" radio button */
 318 static GtkWidget *playlist_new_private;
 319
 320 /** @brief Buttons for new-playlist popup */
 321 static struct button playlist_new_buttons[] = {
 322   {
 323     .stock = GTK_STOCK_OK,
 324     .clicked = playlist_new_ok,
 325     .tip = "Create new playlist"
 326   },
 327   {
 328     .stock = GTK_STOCK_CANCEL,
 329     .clicked = playlist_new_cancel,
 330     .tip = "Do not create new playlist"
 331   }
 332 };
 333 #define NPLAYLIST_NEW_BUTTONS (sizeof playlist_new_buttons / sizeof *playlist_new_buttons)
 334
 335 /** @brief Pop up a new window to enter the playlist name and details */
 336 static void playlist_new_playlist(void) {
 337   assert(playlist_new_window == NULL);
 338   playlist_new_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 339   g_signal_connect(playlist_new_window, "destroy",
 340                    G_CALLBACK(gtk_widget_destroyed), &playlist_new_window);
 341   gtk_window_set_title(GTK_WINDOW(playlist_new_window), "Create new playlist");
 342   /* Window will be modal, suppressing access to other windows */
 343   gtk_window_set_modal(GTK_WINDOW(playlist_new_window), TRUE);
 344   gtk_window_set_transient_for(GTK_WINDOW(playlist_new_window),
 345                                GTK_WINDOW(playlist_window));
 346
 347   /* Window contents will use a table (grid) layout */
 348   GtkWidget *table = gtk_table_new(3, 3, FALSE/*!homogeneous*/);
 349
 350   /* First row: playlist name */
 351   gtk_table_attach_defaults(GTK_TABLE(table),
 352                             gtk_label_new("Playlist name"),
 353                             0, 1, 0, 1);
 354   playlist_new_entry = gtk_entry_new();
 355   g_signal_connect(playlist_new_entry, "changed",
 356                    G_CALLBACK(playlist_new_entry_edited), NULL);
 357   gtk_table_attach_defaults(GTK_TABLE(table),
 358                             playlist_new_entry,
 359                             1, 3, 0, 1);
 360
 361   /* Second row: radio buttons to choose type */
 362   playlist_new_shared = gtk_radio_button_new_with_label(NULL, "shared");
 363   playlist_new_public
 364     = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(playlist_new_shared),
 365                                                   "public");
 366   playlist_new_private
 367     = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(playlist_new_shared),
 368                                                   "private");
 369   g_signal_connect(playlist_new_shared, "toggled",
 370                    G_CALLBACK(playlist_new_button_toggled), NULL);
 371   g_signal_connect(playlist_new_public, "toggled",
 372                    G_CALLBACK(playlist_new_button_toggled), NULL);
 373   g_signal_connect(playlist_new_private, "toggled",
 374                    G_CALLBACK(playlist_new_button_toggled), NULL);
 375   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_shared, 0, 1, 1, 2);
 376   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_public, 1, 2, 1, 2);
 377   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_private, 2, 3, 1, 2);
 378
 379   /* Third row: info bar saying why not */
 380   playlist_new_info = gtk_label_new("");
 381   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_info,
 382                             0, 3, 2, 3);
 383
 384   /* Fourth row: ok/cancel buttons */
 385   GtkWidget *hbox = create_buttons_box(playlist_new_buttons,
 386                                        NPLAYLIST_NEW_BUTTONS,
 387                                        gtk_hbox_new(FALSE, 0));
 388   gtk_table_attach_defaults(GTK_TABLE(table), hbox, 0, 3, 3, 4);
 389
 390   gtk_container_add(GTK_CONTAINER(playlist_new_window),
 391                     frame_widget(table, NULL));
 392
 393   /* Set initial state of OK button */
 394   playlist_new_changed(0,0,0);
 395
 396   g_signal_connect(playlist_new_window, "key-press-event",
 397                    G_CALLBACK(playlist_new_keypress), 0);
 398
 399   /* Display the window */
 400   gtk_widget_show_all(playlist_new_window);
 401 }
 402
 403 /** @brief Keypress handler */
 404 static gboolean playlist_new_keypress(GtkWidget attribute((unused)) *widget,
 405                                       GdkEventKey *event,
 406                                       gpointer attribute((unused)) user_data) {
 407   if(event->state)
 408     return FALSE;
 409   switch(event->keyval) {
 410   case GDK_Return:
 411     playlist_new_ok(NULL, NULL);
 412     return TRUE;
 413   case GDK_Escape:
 414     gtk_widget_destroy(playlist_new_window);
 415     return TRUE;
 416   default:
 417     return FALSE;
 418   }
 419 }
 420
 421 /** @brief Called when 'ok' is clicked in new-playlist popup */
 422 static void playlist_new_ok(GtkButton attribute((unused)) *button,
 423                             gpointer attribute((unused)) userdata) {
 424   if(playlist_new_valid())
 425     return;
 426   gboolean shared, public, private;
 427   char *name, *fullname;
 428   playlist_new_details(&name, &fullname, &shared, &public, &private);
 429
 430   /* We need to:
 431    * - lock the playlist
 432    * - check it doesn't exist
 433    * - set sharing (which will create it empty
 434    * - unlock it
 435    *
 436    * TODO we should freeze the window while this is going on to stop a second
 437    * click.
 438    */
 439   disorder_eclient_playlist_lock(client, playlist_new_locked, fullname,
 440                                  fullname);
 441 }
 442
 443 /** @brief Called when the proposed new playlist has been locked */
 444 static void playlist_new_locked(void *v, const char *err) {
 445   char *fullname = v;
 446   if(err) {
 447     popup_protocol_error(0, err);
 448     return;
 449   }
 450   disorder_eclient_playlist_get(client, playlist_new_retrieved,
 451                                 fullname, fullname);
 452 }
 453
 454 /** @brief Called when the proposed new playlist's contents have been retrieved
 455  *
 456  * ...or rather, normally, when it's been reported that it does not exist.
 457  */
 458 static void playlist_new_retrieved(void *v, const char *err,
 459                                    int nvec,
 460                                    char attribute((unused)) **vec) {
 461   char *fullname = v;
 462   if(!err && nvec != -1)
 463     /* A rare case but not in principle impossible */
 464     err = "A playlist with that name already exists.";
 465   if(err) {
 466     popup_protocol_error(0, err);
 467     disorder_eclient_playlist_unlock(client, playlist_new_unlocked, fullname);
 468     return;
 469   }
 470   gboolean shared, public, private;
 471   playlist_new_details(0, 0, &shared, &public, &private);
 472   disorder_eclient_playlist_set_share(client, playlist_new_created, fullname,
 473                                       public ? "public"
 474                                       : private ? "private"
 475                                       : "shared",
 476                                       fullname);
 477 }
 478
 479 /** @brief Called when the new playlist has been created */
 480 static void playlist_new_created(void attribute((unused)) *v, const char *err) {
 481   if(err) {
 482     popup_protocol_error(0, err);
 483     return;
 484   }
 485   disorder_eclient_playlist_unlock(client, playlist_new_unlocked, NULL);
 486   // TODO arrange for the new playlist to be selected
 487 }
 488
 489 /** @brief Called when the newly created playlist has unlocked */
 490 static void playlist_new_unlocked(void attribute((unused)) *v, const char *err) {
 491   if(err)
 492     popup_protocol_error(0, err);
 493   /* Pop down the creation window */
 494   gtk_widget_destroy(playlist_new_window);
 495 }
 496
 497 /** @brief Called when 'cancel' is clicked in new-playlist popup */
 498 static void playlist_new_cancel(GtkButton attribute((unused)) *button,
 499                                 gpointer attribute((unused)) userdata) {
 500   gtk_widget_destroy(playlist_new_window);
 501 }
 502
 503 /** @brief Called when some radio button in the new-playlist popup changes */
 504 static void playlist_new_button_toggled(GtkToggleButton attribute((unused)) *tb,
 505                                         gpointer attribute((unused)) userdata) {
 506   playlist_new_changed(0,0,0);
 507 }
 508
 509 /** @brief Called when the text entry field in the new-playlist popup changes */
 510 static void playlist_new_entry_edited(GtkEditable attribute((unused)) *editable,
 511                                       gpointer attribute((unused)) user_data) {
 512   playlist_new_changed(0,0,0);
 513 }
 514
 515 /** @brief Called to update new playlist window state
 516  *
 517  * This is called whenever one the text entry or radio buttons changed, and
 518  * also when the set of known playlists changes.  It determines whether the new
 519  * playlist would be creatable and sets the sensitivity of the OK button
 520  * and info display accordingly.
 521  */
 522 static void playlist_new_changed(const char attribute((unused)) *event,
 523                                  void attribute((unused)) *eventdata,
 524                                  void attribute((unused)) *callbackdata) {
 525   if(!playlist_new_window)
 526     return;
 527   const char *reason = playlist_new_valid();
 528   gtk_widget_set_sensitive(playlist_new_buttons[0].widget,
 529                            !reason);
 530   gtk_label_set_text(GTK_LABEL(playlist_new_info), reason);
 531 }
 532
 533 /** @brief Test whether the new-playlist window settings are valid
 534  * @return NULL on success or an error string if not
 535  */
 536 static const char *playlist_new_valid(void) {
 537   gboolean shared, public, private;
 538   char *name, *fullname;
 539   playlist_new_details(&name, &fullname, &shared, &public, &private);
 540   if(!(shared || public || private))
 541     return "No type set.";
 542   if(!*name)
 543     return "";
 544   /* See if the result is valid */
 545   if(!valid_username(name)
 546      || playlist_parse_name(fullname, NULL, NULL))
 547     return "Not a valid playlist name.";
 548   /* See if the result clashes with an existing name.  This is not a perfect
 549    * check, the playlist might be created after this point but before we get a
 550    * chance to disable the "OK" button.  However when we try to create the
 551    * playlist we will first try to retrieve it, with a lock held, so we
 552    * shouldn't end up overwriting anything. */
 553   for(int n = 0; n < nplaylists; ++n)
 554     if(!strcmp(playlists[n], fullname)) {
 555       if(shared)
 556         return "A shared playlist with that name already exists.";
 557       else
 558         return "You already have a playlist with that name.";
 559     }
 560   /* As far as we can tell creation would work */
 561   return NULL;
 562 }
 563
 564 /** @brief Get entered new-playlist details
 565  * @param namep Where to store entered name (or NULL)
 566  * @param fullnamep Where to store computed full name (or NULL)
 567  * @param sharep Where to store 'shared' flag (or NULL)
 568  * @param publicp Where to store 'public' flag (or NULL)
 569  * @param privatep Where to store 'private' flag (or NULL)
 570  */
 571 static void playlist_new_details(char **namep,
 572                                  char **fullnamep,
 573                                  gboolean *sharedp,
 574                                  gboolean *publicp,
 575                                  gboolean *privatep) {
 576   gboolean shared, public, private;
 577   g_object_get(playlist_new_shared, "active", &shared, (char *)NULL);
 578   g_object_get(playlist_new_public, "active", &public, (char *)NULL);
 579   g_object_get(playlist_new_private, "active", &private, (char *)NULL);
 580   char *gname = gtk_editable_get_chars(GTK_EDITABLE(playlist_new_entry),
 581                                        0, -1); /* name owned by calle */
 582   char *name = xstrdup(gname);
 583   g_free(gname);
 584   if(sharedp) *sharedp = shared;
 585   if(publicp) *publicp = public;
 586   if(privatep) *privatep = private;
 587   if(namep) *namep = name;
 588   if(fullnamep) {
 589     if(*sharedp) *fullnamep = *namep;
 590     else byte_xasprintf(fullnamep, "%s.%s", config->username, name);
 591   }
 592 }
 593
 594 /* Playlist picker ---------------------------------------------------------- */
 595
 596 /** @brief Delete button */
 597 static GtkWidget *playlist_picker_delete_button;
 598
 599 /** @brief Tree model for list of playlists */
 600 static GtkListStore *playlist_picker_list;
 601
 602 /** @brief Selection for list of playlists */
 603 static GtkTreeSelection *playlist_picker_selection;
 604
 605 /** @brief Currently selected playlist */
 606 static const char *playlist_picker_selected;
 607
 608 /** @brief (Re-)populate the playlist picker tree model */
 609 static void playlist_picker_fill(const char attribute((unused)) *event,
 610                                  void attribute((unused)) *eventdata,
 611                                  void attribute((unused)) *callbackdata) {
 612   GtkTreeIter iter[1];
 613
 614   if(!playlist_window)
 615     return;
 616   if(!playlist_picker_list)
 617     playlist_picker_list = gtk_list_store_new(1, G_TYPE_STRING);
 618   const char *was_selected = playlist_picker_selected;
 619   gtk_list_store_clear(playlist_picker_list); /* clears playlists_selected */
 620   for(int n = 0; n < nplaylists; ++n) {
 621     gtk_list_store_insert_with_values(playlist_picker_list, iter,
 622                                       n                /*position*/,
 623                                       0, playlists[n], /* column 0 */
 624                                       -1);             /* no more cols */
 625     /* Reselect the selected playlist */
 626     if(was_selected && !strcmp(was_selected, playlists[n]))
 627       gtk_tree_selection_select_iter(playlist_picker_selection, iter);
 628   }
 629   /* TODO deselecting then reselecting the current playlist resets the playlist
 630    * editor, which trashes the user's selection. */
 631 }
 632
 633 /** @brief Called when the selection might have changed */
 634 static void playlist_picker_selection_changed(GtkTreeSelection attribute((unused)) *treeselection,
 635                                               gpointer attribute((unused)) user_data) {
 636   GtkTreeIter iter;
 637   char *gselected, *selected;
 638
 639   /* Identify the current selection */
 640   if(gtk_tree_selection_get_selected(playlist_picker_selection, 0, &iter)) {
 641     gtk_tree_model_get(GTK_TREE_MODEL(playlist_picker_list), &iter,
 642                        0, &gselected, -1);
 643     selected = xstrdup(gselected);
 644     g_free(gselected);
 645   } else
 646     selected = 0;
 647   /* Set button sensitivity according to the new state */
 648   if(selected)
 649     gtk_widget_set_sensitive(playlist_picker_delete_button, 1);
 650   else
 651     gtk_widget_set_sensitive(playlist_picker_delete_button, 0);
 652   /* TODO delete should not be sensitive for public playlists owned by other
 653    * users */
 654   /* Eliminate no-change cases */
 655   if(!selected && !playlist_picker_selected)
 656     return;
 657   if(selected
 658      && playlist_picker_selected
 659      && !strcmp(selected, playlist_picker_selected))
 660     return;
 661   /* Record the new state */
 662   playlist_picker_selected = selected;
 663   /* Re-initalize the queue */
 664   ql_new_queue(&ql_playlist, NULL);
 665   /* Synthesize a playlist-modified to re-initialize the editor etc */
 666   event_raise("playlist-modified", (void *)playlist_picker_selected);
 667 }
 668
 669 /** @brief Called when the 'add' button is pressed */
 670 static void playlist_picker_add(GtkButton attribute((unused)) *button,
 671                                 gpointer attribute((unused)) userdata) {
 672   /* Unselect whatever is selected TODO why?? */
 673   gtk_tree_selection_unselect_all(playlist_picker_selection);
 674   playlist_new_playlist();
 675 }
 676
 677 /** @brief Called when playlist deletion completes */
 678 static void playlists_picker_delete_completed(void attribute((unused)) *v,
 679                                               const char *err) {
 680   if(err)
 681     popup_protocol_error(0, err);
 682 }
 683
 684 /** @brief Called when the 'Delete' button is pressed */
 685 static void playlist_picker_delete(GtkButton attribute((unused)) *button,
 686                                    gpointer attribute((unused)) userdata) {
 687   GtkWidget *yesno;
 688   int res;
 689
 690   if(!playlist_picker_selected)
 691     return;
 692   yesno = gtk_message_dialog_new(GTK_WINDOW(playlist_window),
 693                                  GTK_DIALOG_MODAL,
 694                                  GTK_MESSAGE_QUESTION,
 695                                  GTK_BUTTONS_YES_NO,
 696                                  "Do you really want to delete playlist %s?"
 697                                  " This action cannot be undone.",
 698                                  playlist_picker_selected);
 699   res = gtk_dialog_run(GTK_DIALOG(yesno));
 700   gtk_widget_destroy(yesno);
 701   if(res == GTK_RESPONSE_YES) {
 702     disorder_eclient_playlist_delete(client,
 703                                      playlists_picker_delete_completed,
 704                                      playlist_picker_selected,
 705                                      NULL);
 706   }
 707 }
 708
 709 /** @brief Table of buttons below the playlist list */
 710 static struct button playlist_picker_buttons[] = {
 711   {
 712     GTK_STOCK_ADD,
 713     playlist_picker_add,
 714     "Create a new playlist",
 715     0
 716   },
 717   {
 718     GTK_STOCK_REMOVE,
 719     playlist_picker_delete,
 720     "Delete a playlist",
 721     0
 722   },
 723 };
 724 #define NPLAYLIST_PICKER_BUTTONS (sizeof playlist_picker_buttons / sizeof *playlist_picker_buttons)
 725
 726 /** @brief Create the list of playlists for the edit playlists window */
 727 static GtkWidget *playlist_picker_create(void) {
 728   /* Create the list of playlist and populate it */
 729   playlist_picker_fill(NULL, NULL, NULL);
 730   /* Create the tree view */
 731   GtkWidget *tree = gtk_tree_view_new_with_model(GTK_TREE_MODEL(playlist_picker_list));
 732   /* ...and the renderers for it */
 733   GtkCellRenderer *cr = gtk_cell_renderer_text_new();
 734   GtkTreeViewColumn *col = gtk_tree_view_column_new_with_attributes("Playlist",
 735                                                                     cr,
 736                                                                     "text", 0,
 737                                                                     NULL);
 738   gtk_tree_view_append_column(GTK_TREE_VIEW(tree), col);
 739   /* Get the selection for the view; set its mode; arrange for a callback when
 740    * it changes */
 741   playlist_picker_selected = NULL;
 742   playlist_picker_selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(tree));
 743   gtk_tree_selection_set_mode(playlist_picker_selection, GTK_SELECTION_BROWSE);
 744   g_signal_connect(playlist_picker_selection, "changed",
 745                    G_CALLBACK(playlist_picker_selection_changed), NULL);
 746
 747   /* Create the control buttons */
 748   GtkWidget *buttons = create_buttons_box(playlist_picker_buttons,
 749                                           NPLAYLIST_PICKER_BUTTONS,
 750                                           gtk_hbox_new(FALSE, 1));
 751   playlist_picker_delete_button = playlist_picker_buttons[1].widget;
 752
 753   playlist_picker_selection_changed(NULL, NULL);
 754
 755   /* Buttons live below the list */
 756   GtkWidget *vbox = gtk_vbox_new(FALSE, 0);
 757   gtk_box_pack_start(GTK_BOX(vbox), scroll_widget(tree), TRUE/*expand*/, TRUE/*fill*/, 0);
 758   gtk_box_pack_start(GTK_BOX(vbox), buttons, FALSE/*expand*/, FALSE, 0);
 759
 760   g_signal_connect(tree, "key-press-event",
 761                    G_CALLBACK(playlist_picker_keypress), 0);
 762
 763   return vbox;
 764 }
 765
 766 static gboolean playlist_picker_keypress(GtkWidget attribute((unused)) *widget,
 767                                          GdkEventKey *event,
 768                                          gpointer attribute((unused)) user_data) {
 769   if(event->state)
 770     return FALSE;
 771   switch(event->keyval) {
 772   case GDK_BackSpace:
 773   case GDK_Delete:
 774     playlist_picker_delete(NULL, NULL);
 775     return TRUE;
 776   default:
 777     return FALSE;
 778   }
 779 }
 780
 781 static void playlist_picker_destroy(void) {
 782   playlist_picker_delete_button = NULL;
 783   g_object_unref(playlist_picker_list);
 784   playlist_picker_list = NULL;
 785   playlist_picker_selection = NULL;
 786   playlist_picker_selected = NULL;
 787 }
 788
 789 /* Playlist editor ---------------------------------------------------------- */
 790
 791 static GtkWidget *playlist_editor_shared;
 792 static GtkWidget *playlist_editor_public;
 793 static GtkWidget *playlist_editor_private;
 794 static int playlist_editor_setting_buttons;
 795
 796 static GtkWidget *playlists_editor_create(void) {
 797   assert(ql_playlist.view == NULL);     /* better not be set up already */
 798
 799   GtkWidget *hbox = gtk_hbox_new(FALSE, 0);
 800   playlist_editor_shared = gtk_radio_button_new_with_label(NULL, "shared");
 801   playlist_editor_public
 802     = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(playlist_editor_shared),
 803                                                   "public");
 804   playlist_editor_private
 805     = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(playlist_editor_shared),
 806                                                   "private");
 807   g_signal_connect(playlist_editor_public, "toggled",
 808                    G_CALLBACK(playlist_editor_button_toggled),
 809                    (void *)"public");
 810   g_signal_connect(playlist_editor_private, "toggled",
 811                    G_CALLBACK(playlist_editor_button_toggled),
 812                    (void *)"private");
 813   gtk_box_pack_start(GTK_BOX(hbox), playlist_editor_shared,
 814                      FALSE/*expand*/, FALSE/*fill*/, 0);
 815   gtk_box_pack_start(GTK_BOX(hbox), playlist_editor_public,
 816                      FALSE/*expand*/, FALSE/*fill*/, 0);
 817   gtk_box_pack_start(GTK_BOX(hbox), playlist_editor_private,
 818                      FALSE/*expand*/, FALSE/*fill*/, 0);
 819   playlist_editor_set_buttons(0,0,0);
 820
 821   GtkWidget *vbox = gtk_vbox_new(FALSE, 0);
 822   gtk_box_pack_start(GTK_BOX(vbox), init_queuelike(&ql_playlist),
 823                      TRUE/*expand*/, TRUE/*fill*/, 0);
 824   gtk_box_pack_start(GTK_BOX(vbox), hbox,
 825                      FALSE/*expand*/, FALSE/*fill*/, 0);
 826   return vbox;
 827 }
 828
 829 /** @brief Called when the public/private buttons are set */
 830 static void playlist_editor_button_toggled(GtkToggleButton *tb,
 831                                            gpointer userdata) {
 832   const char *state = userdata;
 833   if(!gtk_toggle_button_get_active(tb)
 834      || !playlist_picker_selected
 835      || playlist_editor_setting_buttons)
 836     return;
 837   disorder_eclient_playlist_set_share(client, playlist_editor_share_set,
 838                                       playlist_picker_selected, state, NULL);
 839 }
 840
 841 static void playlist_editor_share_set(void attribute((unused)) *v,
 842                                       const attribute((unused)) char *err) {
 843   if(err)
 844     popup_protocol_error(0, err);
 845 }
 846
 847 /** @brief Set the editor button state and sensitivity */
 848 static void playlist_editor_set_buttons(const char attribute((unused)) *event,
 849                                         void *eventdata,
 850                                         void attribute((unused)) *callbackdata) {
 851   /* If this event is for a non-selected playlist do nothing */
 852   if(eventdata
 853      && playlist_picker_selected
 854      && strcmp(eventdata, playlist_picker_selected))
 855     return;
 856   if(playlist_picker_selected) {
 857     if(strchr(playlist_picker_selected, '.'))
 858       disorder_eclient_playlist_get_share(client,
 859                                           playlist_editor_got_share,
 860                                           playlist_picker_selected,
 861                                           (void *)playlist_picker_selected);
 862     else
 863       playlist_editor_got_share((void *)playlist_picker_selected, NULL,
 864                                 "shared");
 865   } else
 866     playlist_editor_got_share(NULL, NULL, NULL);
 867 }
 868
 869 /** @brief Called with playlist sharing details */
 870 static void playlist_editor_got_share(void *v,
 871                                       const char *err,
 872                                       const char *value) {
 873   const char *playlist = v;
 874   if(err) {
 875     popup_protocol_error(0, err);
 876     value = NULL;
 877   }
 878   /* Set the currently active button */
 879   ++playlist_editor_setting_buttons;
 880   gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(playlist_editor_shared),
 881                                value && !strcmp(value, "shared"));
 882   gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(playlist_editor_public),
 883                                value && !strcmp(value, "public"));
 884   gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(playlist_editor_private),
 885                                value && !strcmp(value, "private"));
 886   /* Set button sensitivity */
 887   gtk_widget_set_sensitive(playlist_editor_shared, FALSE);
 888   int sensitive = (playlist
 889                    && strchr(playlist, '.')
 890                    && !strncmp(playlist, config->username,
 891                                strlen(config->username)));
 892   gtk_widget_set_sensitive(playlist_editor_public, sensitive);
 893   gtk_widget_set_sensitive(playlist_editor_private, sensitive);
 894   --playlist_editor_setting_buttons;
 895 }
 896
 897 /** @brief (Re-)populate the playlist tree model */
 898 static void playlist_editor_fill(const char attribute((unused)) *event,
 899                                  void *eventdata,
 900                                  void attribute((unused)) *callbackdata) {
 901   const char *modified_playlist = eventdata;
 902   if(!playlist_window)
 903     return;
 904   if(!playlist_picker_selected)
 905     return;
 906   if(!strcmp(playlist_picker_selected, modified_playlist))
 907     disorder_eclient_playlist_get(client, playlists_editor_received_tracks,
 908                                   playlist_picker_selected,
 909                                   (void *)playlist_picker_selected);
 910 }
 911
 912 /** @brief Called with new tracks for the playlist */
 913 static void playlists_editor_received_tracks(void *v,
 914                                              const char *err,
 915                                              int nvec, char **vec) {
 916   const char *playlist = v;
 917   if(err) {
 918     popup_protocol_error(0, err);
 919     return;
 920   }
 921   if(!playlist_picker_selected
 922      || strcmp(playlist, playlist_picker_selected)) {
 923     /* The tracks are for the wrong playlist - something must have changed
 924      * while the fetch command was in flight.  We just ignore this callback,
 925      * the right answer will be requested and arrive in due course. */
 926     return;
 927   }
 928   if(nvec == -1)
 929     /* No such playlist, presumably we'll get a deleted event shortly */
 930     return;
 931   /* Translate the list of tracks into queue entries */
 932   struct queue_entry *newq, **qq = &newq, *qprev = NULL;
 933   hash *h = hash_new(sizeof(int));
 934   for(int n = 0; n < nvec; ++n) {
 935     struct queue_entry *q = xmalloc(sizeof *q);
 936     q->prev = qprev;
 937     q->track = vec[n];
 938     /* Synthesize a unique ID so that the selection survives updates.  Tracks
 939      * can appear more than once in the queue so we can't use raw track names,
 940      * so we add a serial number to the start. */
 941     int *serialp = hash_find(h, vec[n]), serial = serialp ? *serialp : 0;
 942     byte_xasprintf((char **)&q->id, "%d-%s", serial++, vec[n]);
 943     hash_add(h, vec[n], &serial, HASH_INSERT_OR_REPLACE);
 944     *qq = q;
 945     qq = &q->next;
 946     qprev = q;
 947   }
 948   *qq = NULL;
 949   ql_new_queue(&ql_playlist, newq);
 950 }
 951
 952 /* Playlist mutation -------------------------------------------------------- */
 953
 954 /** @brief State structure for guarded playlist modification
 955  *
 956  * To safely move, insert or delete rows we must:
 957  * - take a lock
 958  * - fetch the playlist
 959  * - verify it's not changed
 960  * - update the playlist contents
 961  * - store the playlist
 962  * - release the lock
 963  *
 964  * The playlist_modify_ functions do just that.
 965  *
 966  * To kick things off create one of these and disorder_eclient_playlist_lock()
 967  * with playlist_modify_locked() as its callback.  @c modify will be called; it
 968  * should disorder_eclient_playlist_set() to set the new state with
 969  * playlist_modify_updated() as its callback.
 970  */
 971 struct playlist_modify_data {
 972   /** @brief Affected playlist */
 973   const char *playlist;
 974   /** @brief Modification function
 975    * @param mod Pointer back to state structure
 976    * @param ntracks Length of playlist
 977    * @param tracks Tracks in playlist
 978    */
 979   void (*modify)(struct playlist_modify_data *mod,
 980                 int ntracks, char **tracks);
 981
 982   /** @brief Number of tracks dropped */
 983   int ntracks;
 984   /** @brief Track names dropped */
 985   char **tracks;
 986   /** @brief Track IDs dropped */
 987   char **ids;
 988   /** @brief Drop after this point */
 989   struct queue_entry *after_me;
 990 };
 991
 992 /** @brief Called with playlist locked
 993  *
 994  * This is the entry point for guarded modification ising @ref
 995  * playlist_modify_data.
 996  */
 997 static void playlist_modify_locked(void *v, const char *err) {
 998   struct playlist_modify_data *mod = v;
 999   if(err) {
1000     popup_protocol_error(0, err);
1001     return;
1002   }
1003   disorder_eclient_playlist_get(client, playlist_modify_retrieved,
1004                                 mod->playlist, mod);
1005 }
1006
1007 /** @brief Called with current playlist contents
1008  * Checks that the playlist is still current and has not changed.
1009  */
1010 void playlist_modify_retrieved(void *v, const char *err,
1011                                int nvec,
1012                                char **vec) {
1013   struct playlist_modify_data *mod = v;
1014   if(err) {
1015     popup_protocol_error(0, err);
1016     disorder_eclient_playlist_unlock(client, playlist_modify_unlocked, NULL);
1017     return;
1018   }
1019   if(nvec < 0
1020      || !playlist_picker_selected
1021      || strcmp(mod->playlist, playlist_picker_selected)) {
1022     disorder_eclient_playlist_unlock(client, playlist_modify_unlocked, NULL);
1023     return;
1024   }
1025   /* We check that the contents haven't changed.  If they have we just abandon
1026    * the operation.  The user will have to try again. */
1027   struct queue_entry *q;
1028   int n;
1029   for(n = 0, q = ql_playlist.q; q && n < nvec; ++n, q = q->next)
1030     if(strcmp(q->track, vec[n]))
1031       break;
1032   if(n != nvec || q != NULL)  {
1033     disorder_eclient_playlist_unlock(client, playlist_modify_unlocked, NULL);
1034     return;
1035   }
1036   mod->modify(mod, nvec, vec);
1037 }
1038
1039 /** @brief Called when the playlist has been updated */
1040 static void playlist_modify_updated(void attribute((unused)) *v,
1041                                     const char *err) {
1042   if(err)
1043     popup_protocol_error(0, err);
1044   disorder_eclient_playlist_unlock(client, playlist_modify_unlocked, NULL);
1045 }
1046
1047 /** @brief Called when the playlist has been unlocked */
1048 static void playlist_modify_unlocked(void attribute((unused)) *v,
1049                                      const char *err) {
1050   if(err)
1051     popup_protocol_error(0, err);
1052 }
1053
1054 /* Drop tracks into a playlist ---------------------------------------------- */
1055
1056 static void playlist_drop(struct queuelike attribute((unused)) *ql,
1057                           int ntracks,
1058                           char **tracks, char **ids,
1059                           struct queue_entry *after_me) {
1060   struct playlist_modify_data *mod = xmalloc(sizeof *mod);
1061
1062   mod->playlist = playlist_picker_selected;
1063   mod->modify = playlist_drop_modify;
1064   mod->ntracks = ntracks;
1065   mod->tracks = tracks;
1066   mod->ids = ids;
1067   mod->after_me = after_me;
1068   disorder_eclient_playlist_lock(client, playlist_modify_locked,
1069                                  mod->playlist, mod);
1070 }
1071
1072 /** @brief Return true if track @p i is in the moved set */
1073 static int playlist_drop_is_moved(struct playlist_modify_data *mod,
1074                                   int i) {
1075   struct queue_entry *q;
1076
1077   /* Find the q corresponding to i, so we can get the ID */
1078   for(q = ql_playlist.q; i; q = q->next, --i)
1079     ;
1080   /* See if track i matches any of the moved set by ID */
1081   for(int n = 0; n < mod->ntracks; ++n)
1082     if(!strcmp(q->id, mod->ids[n]))
1083       return 1;
1084   return 0;
1085 }
1086
1087 static void playlist_drop_modify(struct playlist_modify_data *mod,
1088                                  int nvec, char **vec) {
1089   char **newvec;
1090   int nnewvec;
1091
1092   //fprintf(stderr, "\nplaylist_drop_modify\n");
1093   /* after_me is the queue_entry to insert after, or NULL to insert at the
1094    * beginning (including the case when the playlist is empty) */
1095   //fprintf(stderr, "after_me = %s\n",
1096   //        mod->after_me ? mod->after_me->track : "NULL");
1097   struct queue_entry *q = ql_playlist.q;
1098   int ins = 0;
1099   if(mod->after_me) {
1100     ++ins;
1101     while(q && q != mod->after_me) {
1102       q = q->next;
1103       ++ins;
1104     }
1105   }
1106   /* Now ins is the index to insert at; equivalently, the row to insert before,
1107    * and so equal to nvec to append. */
1108 #if 0
1109   fprintf(stderr, "ins = %d = %s\n",
1110           ins, ins < nvec ? vec[ins] : "NULL");
1111   for(int n = 0; n < nvec; ++n)
1112     fprintf(stderr, "%d: %s %s\n", n, n == ins ? "->" : "  ", vec[n]);
1113   fprintf(stderr, "nvec = %d\n", nvec);
1114 #endif
1115   if(mod->ids) {
1116     /* This is a rearrangement */
1117     /* We have:
1118      * - vec[], the current layout
1119      * - ins, pointing into vec
1120      * - mod->tracks[], a subset of vec[] which is to be moved
1121      *
1122      * ins is the insertion point BUT it is in terms of the whole
1123      * array, i.e. before mod->tracks[] have been removed.  The first
1124      * step then is to remove everything in mod->tracks[] and adjust
1125      * ins downwards as necessary.
1126      */
1127     /* First zero out anything that's moved */
1128     int before_ins = 0;
1129     for(int n = 0; n < nvec; ++n) {
1130       if(playlist_drop_is_moved(mod, n)) {
1131         vec[n] = NULL;
1132         if(n < ins)
1133           ++before_ins;
1134       }
1135     }
1136     /* Now collapse down the array */
1137     int i = 0;
1138     for(int n = 0; n < nvec; ++n) {
1139       if(vec[n])
1140         vec[i++] = vec[n];
1141     }
1142     assert(i + mod->ntracks == nvec);
1143     nvec = i;
1144     /* Adjust the insertion point to take account of things moved from before
1145      * it */
1146     ins -= before_ins;
1147     /* The effect is now the same as an insertion */
1148   }
1149   /* This is (now) an insertion */
1150   nnewvec = nvec + mod->ntracks;
1151   newvec = xcalloc(nnewvec, sizeof (char *));
1152   memcpy(newvec, vec,
1153          ins * sizeof (char *));
1154   memcpy(newvec + ins, mod->tracks,
1155          mod->ntracks * sizeof (char *));
1156   memcpy(newvec + ins + mod->ntracks, vec + ins,
1157          (nvec - ins) * sizeof (char *));
1158   disorder_eclient_playlist_set(client, playlist_modify_updated, mod->playlist,
1159                                 newvec, nnewvec, mod);
1160 }
1161
1162 /* Playlist editor right-click menu ---------------------------------------- */
1163
1164 /** @brief Called to determine whether the playlist is playable */
1165 static int playlist_playall_sensitive(void attribute((unused)) *extra) {
1166   /* If there's no playlist obviously we can't play it */
1167   if(!playlist_picker_selected)
1168     return FALSE;
1169   /* If it's empty we can't play it */
1170   if(!ql_playlist.q)
1171     return FALSE;
1172   /* Otherwise we can */
1173   return TRUE;
1174 }
1175
1176 /** @brief Called to play the selected playlist */
1177 static void playlist_playall_activate(GtkMenuItem attribute((unused)) *menuitem,
1178                                       gpointer attribute((unused)) user_data) {
1179   if(!playlist_picker_selected)
1180     return;
1181   /* Re-use the menu-based activation callback */
1182   disorder_eclient_playlist_get(client, playlist_menu_received_content,
1183                                 playlist_picker_selected, NULL);
1184 }
1185
1186 /** @brief Called to determine whether the playlist is playable */
1187 static int playlist_remove_sensitive(void attribute((unused)) *extra) {
1188   /* If there's no playlist obviously we can't remove from it */
1189   if(!playlist_picker_selected)
1190     return FALSE;
1191   /* If no tracks are selected we cannot remove them */
1192   if(!gtk_tree_selection_count_selected_rows(ql_playlist.selection))
1193     return FALSE;
1194   /* We're good to go */
1195   return TRUE;
1196 }
1197
1198 /** @brief Called to remove the selected playlist */
1199 static void playlist_remove_activate(GtkMenuItem attribute((unused)) *menuitem,
1200                                      gpointer attribute((unused)) user_data) {
1201   if(!playlist_picker_selected)
1202     return;
1203   struct playlist_modify_data *mod = xmalloc(sizeof *mod);
1204
1205   mod->playlist = playlist_picker_selected;
1206   mod->modify = playlist_remove_modify;
1207   disorder_eclient_playlist_lock(client, playlist_modify_locked,
1208                                  mod->playlist, mod);
1209 }
1210
1211 static void playlist_remove_modify(struct playlist_modify_data *mod,
1212                                    int attribute((unused)) nvec, char **vec) {
1213   GtkTreeIter iter[1];
1214   gboolean it = gtk_tree_model_get_iter_first(GTK_TREE_MODEL(ql_playlist.store),
1215                                               iter);
1216   int n = 0, m = 0;
1217   while(it) {
1218     if(!gtk_tree_selection_iter_is_selected(ql_playlist.selection, iter))
1219       vec[m++] = vec[n++];
1220     else
1221       n++;
1222     it = gtk_tree_model_iter_next(GTK_TREE_MODEL(ql_playlist.store), iter);
1223   }
1224   disorder_eclient_playlist_set(client, playlist_modify_updated, mod->playlist,
1225                                 vec, m, mod);
1226 }
1227
1228 /* Playlists window --------------------------------------------------------- */
1229
1230 /** @brief Pop up the playlists window
1231  *
1232  * Called when the playlists menu item is selected
1233  */
1234 void playlist_window_create(gpointer attribute((unused)) callback_data,
1235                             guint attribute((unused)) callback_action,
1236                             GtkWidget attribute((unused)) *menu_item) {
1237   /* If the window already exists, raise it */
1238   if(playlist_window) {
1239     gtk_window_present(GTK_WINDOW(playlist_window));
1240     return;
1241   }
1242   /* Create the window */
1243   playlist_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
1244   gtk_widget_set_style(playlist_window, tool_style);
1245   g_signal_connect(playlist_window, "destroy",
1246                    G_CALLBACK(playlist_window_destroyed), &playlist_window);
1247   gtk_window_set_title(GTK_WINDOW(playlist_window), "Playlists Management");
1248   /* TODO loads of this is very similar to (copied from!) users.c - can we
1249    * de-dupe? */
1250   /* Keyboard shortcuts */
1251   g_signal_connect(playlist_window, "key-press-event",
1252                    G_CALLBACK(playlist_window_keypress), 0);
1253   /* default size is too small */
1254   gtk_window_set_default_size(GTK_WINDOW(playlist_window), 640, 320);
1255
1256   GtkWidget *hbox = gtk_hbox_new(FALSE, 0);
1257   gtk_box_pack_start(GTK_BOX(hbox), playlist_picker_create(),
1258                      FALSE/*expand*/, FALSE, 0);
1259   gtk_box_pack_start(GTK_BOX(hbox), gtk_event_box_new(),
1260                      FALSE/*expand*/, FALSE, 2);
1261   gtk_box_pack_start(GTK_BOX(hbox), playlists_editor_create(),
1262                      TRUE/*expand*/, TRUE/*fill*/, 0);
1263
1264   gtk_container_add(GTK_CONTAINER(playlist_window), frame_widget(hbox, NULL));
1265   gtk_widget_show_all(playlist_window);
1266 }
1267
1268 /** @brief Keypress handler */
1269 static gboolean playlist_window_keypress(GtkWidget attribute((unused)) *widget,
1270                                          GdkEventKey *event,
1271                                          gpointer attribute((unused)) user_data) {
1272   if(event->state)
1273     return FALSE;
1274   switch(event->keyval) {
1275   case GDK_Escape:
1276     gtk_widget_destroy(playlist_window);
1277     return TRUE;
1278   default:
1279     return FALSE;
1280   }
1281 }
1282
1283 /** @brief Called when the playlist window is destroyed */
1284 static void playlist_window_destroyed(GtkWidget attribute((unused)) *widget,
1285                                       GtkWidget **widget_pointer) {
1286   destroy_queuelike(&ql_playlist);
1287   playlist_picker_destroy();
1288   *widget_pointer = NULL;
1289 }
1290
1291 /** @brief Initialize playlist support */
1292 void playlists_init(void) {
1293   /* We re-get all playlists upon any change... */
1294   event_register("playlist-created", playlist_list_update, 0);
1295   event_register("playlist-deleted", playlist_list_update, 0);
1296   /* ...and on reconnection */
1297   event_register("log-connected", playlist_list_update, 0);
1298   /* ...and from time to time */
1299   event_register("periodic-slow", playlist_list_update, 0);
1300   /* ...and at startup */
1301   playlist_list_update(0, 0, 0);
1302
1303   /* Update the playlists menu when the set of playlists changes */
1304   event_register("playlists-updated", playlist_menu_changed, 0);
1305   /* Update the new-playlist OK button when the set of playlists changes */
1306   event_register("playlists-updated", playlist_new_changed, 0);
1307   /* Update the list of playlists in the edit window when the set changes */
1308   event_register("playlists-updated", playlist_picker_fill, 0);
1309   /* Update the displayed playlist when it is modified */
1310   event_register("playlist-modified", playlist_editor_fill, 0);
1311   /* Update the shared/public/etc buttons when a playlist is modified */
1312   event_register("playlist-modified", playlist_editor_set_buttons, 0);
1313 }
1314
1315 #endif
1316
1317 /*
1318 Local Variables:
1319 c-basic-offset:2
1320 comment-column:40
1321 fill-column:79
1322 indent-tabs-mode:nil
1323 End:
1324 */