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
  55 /** @brief Playlist editing window */
  56 static GtkWidget *playlist_window;
  57
  58 /** @brief Columns for the playlist editor */
  59 static const struct queue_column playlist_columns[] = {
  60   { "Artist", column_namepart, "artist", COL_EXPAND|COL_ELLIPSIZE },
  61   { "Album",  column_namepart, "album",  COL_EXPAND|COL_ELLIPSIZE },
  62   { "Title",  column_namepart, "title",  COL_EXPAND|COL_ELLIPSIZE },
  63   { "Length", column_length,   0,        COL_RIGHT }
  64 };
  65
  66 /** @brief Pop-up menu for playlist editor */
  67 // TODO some of these may not be generic enough yet - check!
  68 static struct menuitem playlist_menuitems[] = {
  69   { "Track properties", ql_properties_activate, ql_properties_sensitive, 0, 0 },
  70   { "Play track", ql_play_activate, ql_play_sensitive, 0, 0 },
  71   { "Play playlist", playlist_playall_activate, playlist_playall_sensitive, 0, 0 },
  72   { "Remove track from queue", ql_remove_activate, ql_remove_sensitive, 0, 0 },
  73   { "Select all tracks", ql_selectall_activate, ql_selectall_sensitive, 0, 0 },
  74   { "Deselect all tracks", ql_selectnone_activate, ql_selectnone_sensitive, 0, 0 },
  75 };
  76
  77 /** @brief Queuelike for editing a playlist */
  78 static struct queuelike ql_playlist = {
  79   .name = "playlist",
  80   .columns = playlist_columns,
  81   .ncolumns = sizeof playlist_columns / sizeof *playlist_columns,
  82   .menuitems = playlist_menuitems,
  83   .nmenuitems = sizeof playlist_menuitems / sizeof *playlist_menuitems,
  84   //.drop = playlist_drop  //TODO
  85 };
  86
  87 /* Maintaining the list of playlists ---------------------------------------- */
  88
  89 /** @brief Current list of playlists or NULL */
  90 char **playlists;
  91
  92 /** @brief Count of playlists */
  93 int nplaylists;
  94
  95 /** @brief Schedule an update to the list of playlists
  96  *
  97  * Called periodically and when a playlist is created or deleted.
  98  */
  99 static void playlist_list_update(const char attribute((unused)) *event,
 100                                  void attribute((unused)) *eventdata,
 101                                  void attribute((unused)) *callbackdata) {
 102   disorder_eclient_playlists(client, playlist_list_received_playlists, 0);
 103 }
 104
 105 /** @brief qsort() callback for playlist name comparison */
 106 static int playlistcmp(const void *ap, const void *bp) {
 107   const char *a = *(char **)ap, *b = *(char **)bp;
 108   const char *ad = strchr(a, '.'), *bd = strchr(b, '.');
 109   int c;
 110
 111   /* Group owned playlists by owner */
 112   if(ad && bd) {
 113     const int adn = ad - a, bdn = bd - b;
 114     if((c = strncmp(a, b, adn < bdn ? adn : bdn)))
 115       return c;
 116     /* Lexical order within playlists of a single owner */
 117     return strcmp(ad + 1, bd + 1);
 118   }
 119
 120   /* Owned playlists after shared ones */
 121   if(ad) {
 122     return 1;
 123   } else if(bd) {
 124     return -1;
 125   }
 126
 127   /* Lexical order of shared playlists */
 128   return strcmp(a, b);
 129 }
 130
 131 /** @brief Called with a new list of playlists */
 132 static void playlist_list_received_playlists(void attribute((unused)) *v,
 133                                              const char *err,
 134                                              int nvec, char **vec) {
 135   if(err) {
 136     playlists = 0;
 137     nplaylists = -1;
 138     /* Probably means server does not support playlists */
 139   } else {
 140     playlists = vec;
 141     nplaylists = nvec;
 142     qsort(playlists, nplaylists, sizeof (char *), playlistcmp);
 143   }
 144   /* Tell our consumers */
 145   event_raise("playlists-updated", 0);
 146 }
 147
 148 /* Playlists menu ----------------------------------------------------------- */
 149
 150 static void playlist_menu_playing(void attribute((unused)) *v,
 151                                   const char *err) {
 152   if(err)
 153     popup_protocol_error(0, err);
 154 }
 155
 156 /** @brief Play received playlist contents
 157  *
 158  * Passed as a completion callback by menu_activate_playlist().
 159  */
 160 static void playlist_menu_received_content(void attribute((unused)) *v,
 161                                            const char *err,
 162                                            int nvec, char **vec) {
 163   if(err) {
 164     popup_protocol_error(0, err);
 165     return;
 166   }
 167   for(int n = 0; n < nvec; ++n)
 168     disorder_eclient_play(client, vec[n], playlist_menu_playing, NULL);
 169 }
 170
 171 /** @brief Called to activate a playlist
 172  *
 173  * Called when the menu item for a playlist is clicked.
 174  */
 175 static void playlist_menu_activate(GtkMenuItem *menuitem,
 176                                    gpointer attribute((unused)) user_data) {
 177   GtkLabel *label = GTK_LABEL(GTK_BIN(menuitem)->child);
 178   const char *playlist = gtk_label_get_text(label);
 179
 180   disorder_eclient_playlist_get(client, playlist_menu_received_content,
 181                                 playlist, NULL);
 182 }
 183
 184 /** @brief Called when the playlists change
 185  *
 186  * Naively refills the menu.  The results might be unsettling if the menu is
 187  * currently open, but this is hopefuly fairly rare.
 188  */
 189 static void playlist_menu_changed(const char attribute((unused)) *event,
 190                                   void attribute((unused)) *eventdata,
 191                                   void attribute((unused)) *callbackdata) {
 192   if(!playlists_menu)
 193     return;                             /* OMG too soon */
 194   GtkMenuShell *menu = GTK_MENU_SHELL(playlists_menu);
 195   while(menu->children)
 196     gtk_container_remove(GTK_CONTAINER(menu), GTK_WIDGET(menu->children->data));
 197   /* NB nplaylists can be -1 as well as 0 */
 198   for(int n = 0; n < nplaylists; ++n) {
 199     GtkWidget *w = gtk_menu_item_new_with_label(playlists[n]);
 200     g_signal_connect(w, "activate", G_CALLBACK(playlist_menu_activate), 0);
 201     gtk_widget_show(w);
 202     gtk_menu_shell_append(menu, w);
 203   }
 204   gtk_widget_set_sensitive(menu_playlists_widget,
 205                            nplaylists > 0);
 206   gtk_widget_set_sensitive(menu_editplaylists_widget,
 207                            nplaylists >= 0);
 208 }
 209
 210 /* Popup to create a new playlist ------------------------------------------- */
 211
 212 /** @brief New-playlist popup */
 213 static GtkWidget *playlist_new_window;
 214
 215 /** @brief Text entry in new-playlist popup */
 216 static GtkWidget *playlist_new_entry;
 217
 218 /** @brief Label for displaying feedback on what's wrong */
 219 static GtkWidget *playlist_new_info;
 220
 221 /** @brief "Shared" radio button */
 222 static GtkWidget *playlist_new_shared;
 223
 224 /** @brief "Public" radio button */
 225 static GtkWidget *playlist_new_public;
 226
 227 /** @brief "Private" radio button */
 228 static GtkWidget *playlist_new_private;
 229
 230 /** @brief Get entered new-playlist details
 231  * @param namep Where to store entered name (or NULL)
 232  * @param fullnamep Where to store computed full name (or NULL)
 233  * @param sharep Where to store 'shared' flag (or NULL)
 234  * @param publicp Where to store 'public' flag (or NULL)
 235  * @param privatep Where to store 'private' flag (or NULL)
 236  */
 237 static void playlist_new_details(char **namep,
 238                                  char **fullnamep,
 239                                  gboolean *sharedp,
 240                                  gboolean *publicp,
 241                                  gboolean *privatep) {
 242   gboolean shared, public, private;
 243   g_object_get(playlist_new_shared, "active", &shared, (char *)NULL);
 244   g_object_get(playlist_new_public, "active", &public, (char *)NULL);
 245   g_object_get(playlist_new_private, "active", &private, (char *)NULL);
 246   char *gname = gtk_editable_get_chars(GTK_EDITABLE(playlist_new_entry),
 247                                        0, -1); /* name owned by calle */
 248   char *name = xstrdup(gname);
 249   g_free(gname);
 250   if(sharedp) *sharedp = shared;
 251   if(publicp) *publicp = public;
 252   if(privatep) *privatep = private;
 253   if(namep) *namep = name;
 254   if(fullnamep) {
 255     if(*sharedp) *fullnamep = *namep;
 256     else byte_xasprintf(fullnamep, "%s.%s", config->username, name);
 257   }
 258 }
 259
 260 /** @brief Called when the newly created playlist has unlocked */
 261 static void playlist_new_unlocked(void attribute((unused)) *v, const char *err) {
 262   if(err)
 263     popup_protocol_error(0, err);
 264   /* Pop down the creation window */
 265   gtk_widget_destroy(playlist_new_window);
 266 }
 267
 268 /** @brief Called when the new playlist has been created */
 269 static void playlist_new_created(void attribute((unused)) *v, const char *err) {
 270   if(err) {
 271     popup_protocol_error(0, err);
 272     return;
 273   }
 274   disorder_eclient_playlist_unlock(client, playlist_new_unlocked, NULL);
 275   // TODO arrange for the new playlist to be selected
 276 }
 277
 278 /** @brief Called when the proposed new playlist's contents have been retrieved
 279  *
 280  * ...or rather, normally, when it's been reported that it does not exist.
 281  */
 282 static void playlist_new_retrieved(void *v, const char *err,
 283                                    int nvec,
 284                                    char attribute((unused)) **vec) {
 285   char *fullname = v;
 286   if(!err && nvec != -1)
 287     /* A rare case but not in principle impossible */
 288     err = "A playlist with that name already exists.";
 289   if(err) {
 290     popup_protocol_error(0, err);
 291     disorder_eclient_playlist_unlock(client, playlist_new_unlocked, fullname);
 292     return;
 293   }
 294   gboolean shared, public, private;
 295   playlist_new_details(0, 0, &shared, &public, &private);
 296   disorder_eclient_playlist_set_share(client, playlist_new_created, fullname,
 297                                       public ? "public"
 298                                       : private ? "private"
 299                                       : "shared",
 300                                       fullname);
 301 }
 302
 303 /** @brief Called when the proposed new playlist has been locked */
 304 static void playlist_new_locked(void *v, const char *err) {
 305   char *fullname = v;
 306   if(err) {
 307     popup_protocol_error(0, err);
 308     return;
 309   }
 310   disorder_eclient_playlist_get(client, playlist_new_retrieved,
 311                                 fullname, fullname);
 312 }
 313
 314 /** @brief Called when 'ok' is clicked in new-playlist popup */
 315 static void playlist_new_ok(GtkButton attribute((unused)) *button,
 316                             gpointer attribute((unused)) userdata) {
 317   gboolean shared, public, private;
 318   char *name, *fullname;
 319   playlist_new_details(&name, &fullname, &shared, &public, &private);
 320
 321   /* We need to:
 322    * - lock the playlist
 323    * - check it doesn't exist
 324    * - set sharing (which will create it empty
 325    * - unlock it
 326    *
 327    * TODO we should freeze the window while this is going on to stop a second
 328    * click.
 329    */
 330   disorder_eclient_playlist_lock(client, playlist_new_locked, fullname,
 331                                  fullname);
 332 }
 333
 334 /** @brief Called when 'cancel' is clicked in new-playlist popup */
 335 static void playlist_new_cancel(GtkButton attribute((unused)) *button,
 336                                 gpointer attribute((unused)) userdata) {
 337   gtk_widget_destroy(playlist_new_window);
 338 }
 339
 340 /** @brief Buttons for new-playlist popup */
 341 static struct button playlist_new_buttons[] = {
 342   {
 343     .stock = GTK_STOCK_OK,
 344     .clicked = playlist_new_ok,
 345     .tip = "Create new playlist"
 346   },
 347   {
 348     .stock = GTK_STOCK_CANCEL,
 349     .clicked = playlist_new_cancel,
 350     .tip = "Do not create new playlist"
 351   }
 352 };
 353 #define NPLAYLIST_NEW_BUTTONS (sizeof playlist_new_buttons / sizeof *playlist_new_buttons)
 354
 355 /** @brief Test whether the new-playlist window settings are valid
 356  * @return NULL on success or an error string if not
 357  */
 358 static const char *playlist_new_valid(void) {
 359   gboolean shared, public, private;
 360   char *name, *fullname;
 361   playlist_new_details(&name, &fullname, &shared, &public, &private);
 362   if(!(shared || public || private))
 363     return "No type set.";
 364   if(!*name)
 365     return "";
 366   /* See if the result is valid */
 367   if(!valid_username(name)
 368      || playlist_parse_name(fullname, NULL, NULL))
 369     return "Not a valid playlist name.";
 370   /* See if the result clashes with an existing name.  This is not a perfect
 371    * check, the playlist might be created after this point but before we get a
 372    * chance to disable the "OK" button.  However when we try to create the
 373    * playlist we will first try to retrieve it, with a lock held, so we
 374    * shouldn't end up overwriting anything. */
 375   for(int n = 0; n < nplaylists; ++n)
 376     if(!strcmp(playlists[n], fullname)) {
 377       if(shared)
 378         return "A shared playlist with that name already exists.";
 379       else
 380         return "You already have a playlist with that name.";
 381     }
 382   /* As far as we can tell creation would work */
 383   return NULL;
 384 }
 385
 386 /** @brief Called to update new playlist window state
 387  *
 388  * This is called whenever one the text entry or radio buttons changed, and
 389  * also when the set of known playlists changes.  It determines whether the new
 390  * playlist would be creatable and sets the sensitivity of the OK button
 391  * and info display accordingly.
 392  */
 393 static void playlist_new_changed(const char attribute((unused)) *event,
 394                                  void attribute((unused)) *eventdata,
 395                                  void attribute((unused)) *callbackdata) {
 396   if(!playlist_new_window)
 397     return;
 398   const char *reason = playlist_new_valid();
 399   gtk_widget_set_sensitive(playlist_new_buttons[0].widget,
 400                            !reason);
 401   gtk_label_set_text(GTK_LABEL(playlist_new_info), reason);
 402 }
 403
 404 /** @brief Called when some radio button in the new-playlist popup changes */
 405 static void playlist_new_button_toggled(GtkToggleButton attribute((unused)) tb,
 406                                         gpointer attribute((unused)) userdata) {
 407   playlist_new_changed(0,0,0);
 408 }
 409
 410 /** @brief Called when the text entry field in the new-playlist popup changes */
 411 static void playlist_new_entry_edited(GtkEditable attribute((unused)) *editable,
 412                                       gpointer attribute((unused)) user_data) {
 413   playlist_new_changed(0,0,0);
 414 }
 415
 416 /** @brief Pop up a new window to enter the playlist name and details */
 417 static void playlist_new_playlist(void) {
 418   assert(playlist_new_window == NULL);
 419   playlist_new_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 420   g_signal_connect(playlist_new_window, "destroy",
 421                    G_CALLBACK(gtk_widget_destroyed), &playlist_new_window);
 422   gtk_window_set_title(GTK_WINDOW(playlist_new_window), "Create new playlist");
 423   /* Window will be modal, suppressing access to other windows */
 424   gtk_window_set_modal(GTK_WINDOW(playlist_new_window), TRUE);
 425   gtk_window_set_transient_for(GTK_WINDOW(playlist_new_window),
 426                                GTK_WINDOW(playlist_window));
 427
 428   /* Window contents will use a table (grid) layout */
 429   GtkWidget *table = gtk_table_new(3, 3, FALSE/*!homogeneous*/);
 430
 431   /* First row: playlist name */
 432   gtk_table_attach_defaults(GTK_TABLE(table),
 433                             gtk_label_new("Playlist name"),
 434                             0, 1, 0, 1);
 435   playlist_new_entry = gtk_entry_new();
 436   g_signal_connect(playlist_new_entry, "changed",
 437                    G_CALLBACK(playlist_new_entry_edited), NULL);
 438   gtk_table_attach_defaults(GTK_TABLE(table),
 439                             playlist_new_entry,
 440                             1, 3, 0, 1);
 441
 442   /* Second row: radio buttons to choose type */
 443   playlist_new_shared = gtk_radio_button_new_with_label(NULL, "shared");
 444   playlist_new_public
 445     = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(playlist_new_shared),
 446                                                   "public");
 447   playlist_new_private
 448     = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(playlist_new_shared),
 449                                                   "private");
 450   g_signal_connect(playlist_new_shared, "toggled",
 451                    G_CALLBACK(playlist_new_button_toggled), NULL);
 452   g_signal_connect(playlist_new_public, "toggled",
 453                    G_CALLBACK(playlist_new_button_toggled), NULL);
 454   g_signal_connect(playlist_new_private, "toggled",
 455                    G_CALLBACK(playlist_new_button_toggled), NULL);
 456   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_shared, 0, 1, 1, 2);
 457   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_public, 1, 2, 1, 2);
 458   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_private, 2, 3, 1, 2);
 459
 460   /* Third row: info bar saying why not */
 461   playlist_new_info = gtk_label_new("");
 462   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_info,
 463                             0, 3, 2, 3);
 464
 465   /* Fourth row: ok/cancel buttons */
 466   GtkWidget *hbox = create_buttons_box(playlist_new_buttons,
 467                                        NPLAYLIST_NEW_BUTTONS,
 468                                        gtk_hbox_new(FALSE, 0));
 469   gtk_table_attach_defaults(GTK_TABLE(table), hbox, 0, 3, 3, 4);
 470
 471   gtk_container_add(GTK_CONTAINER(playlist_new_window),
 472                     frame_widget(table, NULL));
 473
 474   /* Set initial state of OK button */
 475   playlist_new_changed(0,0,0);
 476
 477   /* TODO: return should = OK, escape should = cancel */
 478
 479   /* Display the window */
 480   gtk_widget_show_all(playlist_new_window);
 481 }
 482
 483 /* Playlist picker ---------------------------------------------------------- */
 484
 485 /** @brief Delete button */
 486 static GtkWidget *playlist_picker_delete_button;
 487
 488 /** @brief Tree model for list of playlists */
 489 static GtkListStore *playlist_picker_list;
 490
 491 /** @brief Selection for list of playlists */
 492 static GtkTreeSelection *playlist_picker_selection;
 493
 494 /** @brief Currently selected playlist */
 495 static const char *playlist_picker_selected;
 496
 497 /** @brief (Re-)populate the playlist picker tree model */
 498 static void playlist_picker_fill(const char attribute((unused)) *event,
 499                                  void attribute((unused)) *eventdata,
 500                                  void attribute((unused)) *callbackdata) {
 501   GtkTreeIter iter[1];
 502
 503   if(!playlist_window)
 504     return;
 505   if(!playlist_picker_list)
 506     playlist_picker_list = gtk_list_store_new(1, G_TYPE_STRING);
 507   const char *was_selected = playlist_picker_selected;
 508   gtk_list_store_clear(playlist_picker_list); /* clears playlists_selected */
 509   for(int n = 0; n < nplaylists; ++n) {
 510     gtk_list_store_insert_with_values(playlist_picker_list, iter,
 511                                       n                /*position*/,
 512                                       0, playlists[n], /* column 0 */
 513                                       -1);             /* no more cols */
 514     /* Reselect the selected playlist */
 515     if(was_selected && !strcmp(was_selected, playlists[n]))
 516       gtk_tree_selection_select_iter(playlist_picker_selection, iter);
 517   }
 518   /* TODO deselecting then reselecting the current playlist resets the playlist
 519    * editor, which trashes the user's selection. */
 520 }
 521
 522 /** @brief Called when the selection might have changed */
 523 static void playlist_picker_selection_changed(GtkTreeSelection attribute((unused)) *treeselection,
 524                                               gpointer attribute((unused)) user_data) {
 525   GtkTreeIter iter;
 526   char *gselected, *selected;
 527
 528   /* Identify the current selection */
 529   if(gtk_tree_selection_get_selected(playlist_picker_selection, 0, &iter)) {
 530     gtk_tree_model_get(GTK_TREE_MODEL(playlist_picker_list), &iter,
 531                        0, &gselected, -1);
 532     selected = xstrdup(gselected);
 533     g_free(gselected);
 534   } else
 535     selected = 0;
 536   /* Set button sensitivity according to the new state */
 537   if(selected)
 538     gtk_widget_set_sensitive(playlist_picker_delete_button, 1);
 539   else
 540     gtk_widget_set_sensitive(playlist_picker_delete_button, 0);
 541   /* Eliminate no-change cases */
 542   if(!selected && !playlist_picker_selected)
 543     return;
 544   if(selected
 545      && playlist_picker_selected
 546      && !strcmp(selected, playlist_picker_selected))
 547     return;
 548   /* Record the new state */
 549   playlist_picker_selected = selected;
 550   /* Re-initalize the queue */
 551   ql_new_queue(&ql_playlist, NULL);
 552   playlist_editor_fill(NULL, (void *)playlist_picker_selected, NULL);
 553 }
 554
 555 /** @brief Called when the 'add' button is pressed */
 556 static void playlist_picker_add(GtkButton attribute((unused)) *button,
 557                                 gpointer attribute((unused)) userdata) {
 558   /* Unselect whatever is selected TODO why?? */
 559   gtk_tree_selection_unselect_all(playlist_picker_selection);
 560   playlist_new_playlist();
 561 }
 562
 563 /** @brief Called when playlist deletion completes */
 564 static void playlists_picker_delete_completed(void attribute((unused)) *v,
 565                                               const char *err) {
 566   if(err)
 567     popup_protocol_error(0, err);
 568 }
 569
 570 /** @brief Called when the 'Delete' button is pressed */
 571 static void playlist_picker_delete(GtkButton attribute((unused)) *button,
 572                                    gpointer attribute((unused)) userdata) {
 573   GtkWidget *yesno;
 574   int res;
 575
 576   if(!playlist_picker_selected)
 577     return;                             /* shouldn't happen */
 578   yesno = gtk_message_dialog_new(GTK_WINDOW(playlist_window),
 579                                  GTK_DIALOG_MODAL,
 580                                  GTK_MESSAGE_QUESTION,
 581                                  GTK_BUTTONS_YES_NO,
 582                                  "Do you really want to delete playlist %s?"
 583                                  " This action cannot be undone.",
 584                                  playlist_picker_selected);
 585   res = gtk_dialog_run(GTK_DIALOG(yesno));
 586   gtk_widget_destroy(yesno);
 587   if(res == GTK_RESPONSE_YES) {
 588     disorder_eclient_playlist_delete(client,
 589                                      playlists_picker_delete_completed,
 590                                      playlist_picker_selected,
 591                                      NULL);
 592   }
 593 }
 594
 595 /** @brief Table of buttons below the playlist list */
 596 static struct button playlist_picker_buttons[] = {
 597   {
 598     GTK_STOCK_ADD,
 599     playlist_picker_add,
 600     "Create a new playlist",
 601     0
 602   },
 603   {
 604     GTK_STOCK_REMOVE,
 605     playlist_picker_delete,
 606     "Delete a playlist",
 607     0
 608   },
 609 };
 610 #define NPLAYLIST_PICKER_BUTTONS (sizeof playlist_picker_buttons / sizeof *playlist_picker_buttons)
 611
 612 /** @brief Create the list of playlists for the edit playlists window */
 613 static GtkWidget *playlist_picker_create(void) {
 614   /* Create the list of playlist and populate it */
 615   playlist_picker_fill(NULL, NULL, NULL);
 616   /* Create the tree view */
 617   GtkWidget *tree = gtk_tree_view_new_with_model(GTK_TREE_MODEL(playlist_picker_list));
 618   /* ...and the renderers for it */
 619   GtkCellRenderer *cr = gtk_cell_renderer_text_new();
 620   GtkTreeViewColumn *col = gtk_tree_view_column_new_with_attributes("Playlist",
 621                                                                     cr,
 622                                                                     "text", 0,
 623                                                                     NULL);
 624   gtk_tree_view_append_column(GTK_TREE_VIEW(tree), col);
 625   /* Get the selection for the view; set its mode; arrange for a callback when
 626    * it changes */
 627   playlist_picker_selected = NULL;
 628   playlist_picker_selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(tree));
 629   gtk_tree_selection_set_mode(playlist_picker_selection, GTK_SELECTION_BROWSE);
 630   g_signal_connect(playlist_picker_selection, "changed",
 631                    G_CALLBACK(playlist_picker_selection_changed), NULL);
 632
 633   /* Create the control buttons */
 634   GtkWidget *buttons = create_buttons_box(playlist_picker_buttons,
 635                                           NPLAYLIST_PICKER_BUTTONS,
 636                                           gtk_hbox_new(FALSE, 1));
 637   playlist_picker_delete_button = playlist_picker_buttons[1].widget;
 638
 639   playlist_picker_selection_changed(NULL, NULL);
 640
 641   /* Buttons live below the list */
 642   GtkWidget *vbox = gtk_vbox_new(FALSE, 0);
 643   gtk_box_pack_start(GTK_BOX(vbox), scroll_widget(tree), TRUE/*expand*/, TRUE/*fill*/, 0);
 644   gtk_box_pack_start(GTK_BOX(vbox), buttons, FALSE/*expand*/, FALSE, 0);
 645
 646   return vbox;
 647 }
 648
 649 /* Playlist editor ---------------------------------------------------------- */
 650
 651 /** @brief Called with new tracks for the playlist */
 652 static void playlists_editor_received_tracks(void *v,
 653                                              const char *err,
 654                                              int nvec, char **vec) {
 655   const char *playlist = v;
 656   if(err) {
 657     popup_protocol_error(0, err);
 658     return;
 659   }
 660   if(!playlist_picker_selected
 661      || strcmp(playlist, playlist_picker_selected)) {
 662     /* The tracks are for the wrong playlist - something must have changed
 663      * while the fetch command was in flight.  We just ignore this callback,
 664      * the right answer will be requested and arrive in due course. */
 665     return;
 666   }
 667   if(nvec == -1)
 668     /* No such playlist, presumably we'll get a deleted event shortly */
 669     return;
 670   /* Translate the list of tracks into queue entries */
 671   struct queue_entry *newq, **qq = &newq;
 672   hash *h = hash_new(sizeof(int));
 673   for(int n = 0; n < nvec; ++n) {
 674     struct queue_entry *q = xmalloc(sizeof *q);
 675     q->track = vec[n];
 676     /* Synthesize a unique ID so that the selection survives updates.  Tracks
 677      * can appear more than once in the queue so we can't use raw track names,
 678      * so we add a serial number to the start. */
 679     int *serialp = hash_find(h, vec[n]), serial = serialp ? *serialp : 0;
 680     byte_xasprintf((char **)&q->id, "%d-%s", serial++, vec[n]);
 681     hash_add(h, vec[0], &serial, HASH_INSERT_OR_REPLACE);
 682     *qq = q;
 683     qq = &q->next;
 684   }
 685   *qq = NULL;
 686   ql_new_queue(&ql_playlist, newq);
 687 }
 688
 689 /** @brief (Re-)populate the playlist tree model */
 690 static void playlist_editor_fill(const char attribute((unused)) *event,
 691                                  void *eventdata,
 692                                  void attribute((unused)) *callbackdata) {
 693   const char *modified_playlist = eventdata;
 694   if(!playlist_window)
 695     return;
 696   if(!playlist_picker_selected)
 697     return;
 698   if(!strcmp(playlist_picker_selected, modified_playlist))
 699     disorder_eclient_playlist_get(client, playlists_editor_received_tracks,
 700                                   playlist_picker_selected,
 701                                   (void *)playlist_picker_selected);
 702 }
 703
 704 static GtkWidget *playlists_editor_create(void) {
 705   assert(ql_playlist.view == NULL);     /* better not be set up already */
 706   GtkWidget *w = init_queuelike(&ql_playlist);
 707   /* Initially empty */
 708   return w;
 709 }
 710
 711 /* Playlist editor right-click menu ---------------------------------------- */
 712
 713 /** @brief Called to determine whether the playlist is playable */
 714 static int playlist_playall_sensitive(void attribute((unused)) *extra) {
 715   /* If there's no playlist obviously we can't play it */
 716   if(!playlist_picker_selected)
 717     return FALSE;
 718   /* If it's empty we can't play it */
 719   if(!ql_playlist.q)
 720     return FALSE;
 721   /* Otherwise we can */
 722   return TRUE;
 723 }
 724
 725 /** @brief Called to play the selected playlist */
 726 static void playlist_playall_activate(GtkMenuItem attribute((unused)) *menuitem,
 727                                       gpointer attribute((unused)) user_data) {
 728   if(!playlist_picker_selected)
 729     return;
 730   /* Re-use the menu-based activation callback */
 731   disorder_eclient_playlist_get(client, playlist_menu_received_content,
 732                                 playlist_picker_selected, NULL);
 733 }
 734
 735 /* Playlists window --------------------------------------------------------- */
 736
 737 /** @brief Keypress handler */
 738 static gboolean playlist_window_keypress(GtkWidget attribute((unused)) *widget,
 739                                          GdkEventKey *event,
 740                                          gpointer attribute((unused)) user_data) {
 741   if(event->state)
 742     return FALSE;
 743   switch(event->keyval) {
 744   case GDK_Escape:
 745     gtk_widget_destroy(playlist_window);
 746     return TRUE;
 747   default:
 748     return FALSE;
 749   }
 750 }
 751
 752 /** @brief Called when the playlist window is destroyed */
 753 static void playlist_window_destroyed(GtkWidget attribute((unused)) *widget,
 754                                       GtkWidget **widget_pointer) {
 755   destroy_queuelike(&ql_playlist);
 756   *widget_pointer = NULL;
 757 }
 758
 759 /** @brief Pop up the playlists window
 760  *
 761  * Called when the playlists menu item is selected
 762  */
 763 void playlist_window_create(gpointer attribute((unused)) callback_data,
 764                             guint attribute((unused)) callback_action,
 765                             GtkWidget attribute((unused)) *menu_item) {
 766   /* If the window already exists, raise it */
 767   if(playlist_window) {
 768     gtk_window_present(GTK_WINDOW(playlist_window));
 769     return;
 770   }
 771   /* Create the window */
 772   playlist_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 773   gtk_widget_set_style(playlist_window, tool_style);
 774   g_signal_connect(playlist_window, "destroy",
 775                    G_CALLBACK(playlist_window_destroyed), &playlist_window);
 776   gtk_window_set_title(GTK_WINDOW(playlist_window), "Playlists Management");
 777   /* TODO loads of this is very similar to (copied from!) users.c - can we
 778    * de-dupe? */
 779   /* Keyboard shortcuts */
 780   g_signal_connect(playlist_window, "key-press-event",
 781                    G_CALLBACK(playlist_window_keypress), 0);
 782   /* default size is too small */
 783   gtk_window_set_default_size(GTK_WINDOW(playlist_window), 512, 240);
 784
 785   GtkWidget *hbox = gtk_hbox_new(FALSE, 0);
 786   gtk_box_pack_start(GTK_BOX(hbox), playlist_picker_create(),
 787                      FALSE/*expand*/, FALSE, 0);
 788   gtk_box_pack_start(GTK_BOX(hbox), gtk_event_box_new(),
 789                      FALSE/*expand*/, FALSE, 2);
 790   gtk_box_pack_start(GTK_BOX(hbox), playlists_editor_create(),
 791                      TRUE/*expand*/, TRUE/*fill*/, 0);
 792
 793   gtk_container_add(GTK_CONTAINER(playlist_window), frame_widget(hbox, NULL));
 794   gtk_widget_show_all(playlist_window);
 795 }
 796
 797 /** @brief Initialize playlist support */
 798 void playlists_init(void) {
 799   /* We re-get all playlists upon any change... */
 800   event_register("playlist-created", playlist_list_update, 0);
 801   event_register("playlist-deleted", playlist_list_update, 0);
 802   /* ...and on reconnection */
 803   event_register("log-connected", playlist_list_update, 0);
 804   /* ...and from time to time */
 805   event_register("periodic-slow", playlist_list_update, 0);
 806   /* ...and at startup */
 807   playlist_list_update(0, 0, 0);
 808
 809   /* Update the playlists menu when the set of playlists changes */
 810   event_register("playlists-updated", playlist_menu_changed, 0);
 811   /* Update the new-playlist OK button when the set of playlists changes */
 812   event_register("playlists-updated", playlist_new_changed, 0);
 813   /* Update the list of playlists in the edit window when the set changes */
 814   event_register("playlists-updated", playlist_picker_fill, 0);
 815   /* Update the displayed playlist when it is modified */
 816   event_register("playlist-modified", playlist_editor_fill, 0);
 817 }
 818
 819 #endif
 820
 821 /*
 822 Local Variables:
 823 c-basic-offset:2
 824 comment-column:40
 825 fill-column:79
 826 indent-tabs-mode:nil
 827 End:
 828 */