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
  58 /** @brief Playlist editing window */
  59 static GtkWidget *playlist_window;
  60
  61 /** @brief Columns for the playlist editor */
  62 static const struct queue_column playlist_columns[] = {
  63   { "Artist", column_namepart, "artist", COL_EXPAND|COL_ELLIPSIZE },
  64   { "Album",  column_namepart, "album",  COL_EXPAND|COL_ELLIPSIZE },
  65   { "Title",  column_namepart, "title",  COL_EXPAND|COL_ELLIPSIZE },
  66   { "Length", column_length,   0,        COL_RIGHT }
  67 };
  68
  69 /** @brief Pop-up menu for playlist editor
  70  *
  71  * Status:
  72  * - track properties works but, bizarrely, raises the main window
  73  * - play track works
  74  * - play playlist works
  75  * - select/deselect all work
  76  */
  77 static struct menuitem playlist_menuitems[] = {
  78   { "Track properties", ql_properties_activate, ql_properties_sensitive, 0, 0 },
  79   { "Play track", ql_play_activate, ql_play_sensitive, 0, 0 },
  80   { "Play playlist", playlist_playall_activate, playlist_playall_sensitive, 0, 0 },
  81   { "Remove track from queue", playlist_remove_activate, playlist_remove_sensitive, 0, 0 },
  82   { "Select all tracks", ql_selectall_activate, ql_selectall_sensitive, 0, 0 },
  83   { "Deselect all tracks", ql_selectnone_activate, ql_selectnone_sensitive, 0, 0 },
  84 };
  85
  86 /** @brief Queuelike for editing a playlist */
  87 static struct queuelike ql_playlist = {
  88   .name = "playlist",
  89   .columns = playlist_columns,
  90   .ncolumns = sizeof playlist_columns / sizeof *playlist_columns,
  91   .menuitems = playlist_menuitems,
  92   .nmenuitems = sizeof playlist_menuitems / sizeof *playlist_menuitems,
  93   //.drop = playlist_drop  //TODO
  94 };
  95
  96 /* Maintaining the list of playlists ---------------------------------------- */
  97
  98 /** @brief Current list of playlists or NULL */
  99 char **playlists;
 100
 101 /** @brief Count of playlists */
 102 int nplaylists;
 103
 104 /** @brief Schedule an update to the list of playlists
 105  *
 106  * Called periodically and when a playlist is created or deleted.
 107  */
 108 static void playlist_list_update(const char attribute((unused)) *event,
 109                                  void attribute((unused)) *eventdata,
 110                                  void attribute((unused)) *callbackdata) {
 111   disorder_eclient_playlists(client, playlist_list_received_playlists, 0);
 112 }
 113
 114 /** @brief qsort() callback for playlist name comparison */
 115 static int playlistcmp(const void *ap, const void *bp) {
 116   const char *a = *(char **)ap, *b = *(char **)bp;
 117   const char *ad = strchr(a, '.'), *bd = strchr(b, '.');
 118   int c;
 119
 120   /* Group owned playlists by owner */
 121   if(ad && bd) {
 122     const int adn = ad - a, bdn = bd - b;
 123     if((c = strncmp(a, b, adn < bdn ? adn : bdn)))
 124       return c;
 125     /* Lexical order within playlists of a single owner */
 126     return strcmp(ad + 1, bd + 1);
 127   }
 128
 129   /* Owned playlists after shared ones */
 130   if(ad) {
 131     return 1;
 132   } else if(bd) {
 133     return -1;
 134   }
 135
 136   /* Lexical order of shared playlists */
 137   return strcmp(a, b);
 138 }
 139
 140 /** @brief Called with a new list of playlists */
 141 static void playlist_list_received_playlists(void attribute((unused)) *v,
 142                                              const char *err,
 143                                              int nvec, char **vec) {
 144   if(err) {
 145     playlists = 0;
 146     nplaylists = -1;
 147     /* Probably means server does not support playlists */
 148   } else {
 149     playlists = vec;
 150     nplaylists = nvec;
 151     qsort(playlists, nplaylists, sizeof (char *), playlistcmp);
 152   }
 153   /* Tell our consumers */
 154   event_raise("playlists-updated", 0);
 155 }
 156
 157 /* Playlists menu ----------------------------------------------------------- */
 158
 159 static void playlist_menu_playing(void attribute((unused)) *v,
 160                                   const char *err) {
 161   if(err)
 162     popup_protocol_error(0, err);
 163 }
 164
 165 /** @brief Play received playlist contents
 166  *
 167  * Passed as a completion callback by menu_activate_playlist().
 168  */
 169 static void playlist_menu_received_content(void attribute((unused)) *v,
 170                                            const char *err,
 171                                            int nvec, char **vec) {
 172   if(err) {
 173     popup_protocol_error(0, err);
 174     return;
 175   }
 176   for(int n = 0; n < nvec; ++n)
 177     disorder_eclient_play(client, vec[n], playlist_menu_playing, NULL);
 178 }
 179
 180 /** @brief Called to activate a playlist
 181  *
 182  * Called when the menu item for a playlist is clicked.
 183  */
 184 static void playlist_menu_activate(GtkMenuItem *menuitem,
 185                                    gpointer attribute((unused)) user_data) {
 186   GtkLabel *label = GTK_LABEL(GTK_BIN(menuitem)->child);
 187   const char *playlist = gtk_label_get_text(label);
 188
 189   disorder_eclient_playlist_get(client, playlist_menu_received_content,
 190                                 playlist, NULL);
 191 }
 192
 193 /** @brief Called when the playlists change
 194  *
 195  * Naively refills the menu.  The results might be unsettling if the menu is
 196  * currently open, but this is hopefuly fairly rare.
 197  */
 198 static void playlist_menu_changed(const char attribute((unused)) *event,
 199                                   void attribute((unused)) *eventdata,
 200                                   void attribute((unused)) *callbackdata) {
 201   if(!playlists_menu)
 202     return;                             /* OMG too soon */
 203   GtkMenuShell *menu = GTK_MENU_SHELL(playlists_menu);
 204   while(menu->children)
 205     gtk_container_remove(GTK_CONTAINER(menu), GTK_WIDGET(menu->children->data));
 206   /* NB nplaylists can be -1 as well as 0 */
 207   for(int n = 0; n < nplaylists; ++n) {
 208     GtkWidget *w = gtk_menu_item_new_with_label(playlists[n]);
 209     g_signal_connect(w, "activate", G_CALLBACK(playlist_menu_activate), 0);
 210     gtk_widget_show(w);
 211     gtk_menu_shell_append(menu, w);
 212   }
 213   gtk_widget_set_sensitive(menu_playlists_widget,
 214                            nplaylists > 0);
 215   gtk_widget_set_sensitive(menu_editplaylists_widget,
 216                            nplaylists >= 0);
 217 }
 218
 219 /* Popup to create a new playlist ------------------------------------------- */
 220
 221 /** @brief New-playlist popup */
 222 static GtkWidget *playlist_new_window;
 223
 224 /** @brief Text entry in new-playlist popup */
 225 static GtkWidget *playlist_new_entry;
 226
 227 /** @brief Label for displaying feedback on what's wrong */
 228 static GtkWidget *playlist_new_info;
 229
 230 /** @brief "Shared" radio button */
 231 static GtkWidget *playlist_new_shared;
 232
 233 /** @brief "Public" radio button */
 234 static GtkWidget *playlist_new_public;
 235
 236 /** @brief "Private" radio button */
 237 static GtkWidget *playlist_new_private;
 238
 239 /** @brief Get entered new-playlist details
 240  * @param namep Where to store entered name (or NULL)
 241  * @param fullnamep Where to store computed full name (or NULL)
 242  * @param sharep Where to store 'shared' flag (or NULL)
 243  * @param publicp Where to store 'public' flag (or NULL)
 244  * @param privatep Where to store 'private' flag (or NULL)
 245  */
 246 static void playlist_new_details(char **namep,
 247                                  char **fullnamep,
 248                                  gboolean *sharedp,
 249                                  gboolean *publicp,
 250                                  gboolean *privatep) {
 251   gboolean shared, public, private;
 252   g_object_get(playlist_new_shared, "active", &shared, (char *)NULL);
 253   g_object_get(playlist_new_public, "active", &public, (char *)NULL);
 254   g_object_get(playlist_new_private, "active", &private, (char *)NULL);
 255   char *gname = gtk_editable_get_chars(GTK_EDITABLE(playlist_new_entry),
 256                                        0, -1); /* name owned by calle */
 257   char *name = xstrdup(gname);
 258   g_free(gname);
 259   if(sharedp) *sharedp = shared;
 260   if(publicp) *publicp = public;
 261   if(privatep) *privatep = private;
 262   if(namep) *namep = name;
 263   if(fullnamep) {
 264     if(*sharedp) *fullnamep = *namep;
 265     else byte_xasprintf(fullnamep, "%s.%s", config->username, name);
 266   }
 267 }
 268
 269 /** @brief Called when the newly created playlist has unlocked */
 270 static void playlist_new_unlocked(void attribute((unused)) *v, const char *err) {
 271   if(err)
 272     popup_protocol_error(0, err);
 273   /* Pop down the creation window */
 274   gtk_widget_destroy(playlist_new_window);
 275 }
 276
 277 /** @brief Called when the new playlist has been created */
 278 static void playlist_new_created(void attribute((unused)) *v, const char *err) {
 279   if(err) {
 280     popup_protocol_error(0, err);
 281     return;
 282   }
 283   disorder_eclient_playlist_unlock(client, playlist_new_unlocked, NULL);
 284   // TODO arrange for the new playlist to be selected
 285 }
 286
 287 /** @brief Called when the proposed new playlist's contents have been retrieved
 288  *
 289  * ...or rather, normally, when it's been reported that it does not exist.
 290  */
 291 static void playlist_new_retrieved(void *v, const char *err,
 292                                    int nvec,
 293                                    char attribute((unused)) **vec) {
 294   char *fullname = v;
 295   if(!err && nvec != -1)
 296     /* A rare case but not in principle impossible */
 297     err = "A playlist with that name already exists.";
 298   if(err) {
 299     popup_protocol_error(0, err);
 300     disorder_eclient_playlist_unlock(client, playlist_new_unlocked, fullname);
 301     return;
 302   }
 303   gboolean shared, public, private;
 304   playlist_new_details(0, 0, &shared, &public, &private);
 305   disorder_eclient_playlist_set_share(client, playlist_new_created, fullname,
 306                                       public ? "public"
 307                                       : private ? "private"
 308                                       : "shared",
 309                                       fullname);
 310 }
 311
 312 /** @brief Called when the proposed new playlist has been locked */
 313 static void playlist_new_locked(void *v, const char *err) {
 314   char *fullname = v;
 315   if(err) {
 316     popup_protocol_error(0, err);
 317     return;
 318   }
 319   disorder_eclient_playlist_get(client, playlist_new_retrieved,
 320                                 fullname, fullname);
 321 }
 322
 323 /** @brief Called when 'ok' is clicked in new-playlist popup */
 324 static void playlist_new_ok(GtkButton attribute((unused)) *button,
 325                             gpointer attribute((unused)) userdata) {
 326   gboolean shared, public, private;
 327   char *name, *fullname;
 328   playlist_new_details(&name, &fullname, &shared, &public, &private);
 329
 330   /* We need to:
 331    * - lock the playlist
 332    * - check it doesn't exist
 333    * - set sharing (which will create it empty
 334    * - unlock it
 335    *
 336    * TODO we should freeze the window while this is going on to stop a second
 337    * click.
 338    */
 339   disorder_eclient_playlist_lock(client, playlist_new_locked, fullname,
 340                                  fullname);
 341 }
 342
 343 /** @brief Called when 'cancel' is clicked in new-playlist popup */
 344 static void playlist_new_cancel(GtkButton attribute((unused)) *button,
 345                                 gpointer attribute((unused)) userdata) {
 346   gtk_widget_destroy(playlist_new_window);
 347 }
 348
 349 /** @brief Buttons for new-playlist popup */
 350 static struct button playlist_new_buttons[] = {
 351   {
 352     .stock = GTK_STOCK_OK,
 353     .clicked = playlist_new_ok,
 354     .tip = "Create new playlist"
 355   },
 356   {
 357     .stock = GTK_STOCK_CANCEL,
 358     .clicked = playlist_new_cancel,
 359     .tip = "Do not create new playlist"
 360   }
 361 };
 362 #define NPLAYLIST_NEW_BUTTONS (sizeof playlist_new_buttons / sizeof *playlist_new_buttons)
 363
 364 /** @brief Test whether the new-playlist window settings are valid
 365  * @return NULL on success or an error string if not
 366  */
 367 static const char *playlist_new_valid(void) {
 368   gboolean shared, public, private;
 369   char *name, *fullname;
 370   playlist_new_details(&name, &fullname, &shared, &public, &private);
 371   if(!(shared || public || private))
 372     return "No type set.";
 373   if(!*name)
 374     return "";
 375   /* See if the result is valid */
 376   if(!valid_username(name)
 377      || playlist_parse_name(fullname, NULL, NULL))
 378     return "Not a valid playlist name.";
 379   /* See if the result clashes with an existing name.  This is not a perfect
 380    * check, the playlist might be created after this point but before we get a
 381    * chance to disable the "OK" button.  However when we try to create the
 382    * playlist we will first try to retrieve it, with a lock held, so we
 383    * shouldn't end up overwriting anything. */
 384   for(int n = 0; n < nplaylists; ++n)
 385     if(!strcmp(playlists[n], fullname)) {
 386       if(shared)
 387         return "A shared playlist with that name already exists.";
 388       else
 389         return "You already have a playlist with that name.";
 390     }
 391   /* As far as we can tell creation would work */
 392   return NULL;
 393 }
 394
 395 /** @brief Called to update new playlist window state
 396  *
 397  * This is called whenever one the text entry or radio buttons changed, and
 398  * also when the set of known playlists changes.  It determines whether the new
 399  * playlist would be creatable and sets the sensitivity of the OK button
 400  * and info display accordingly.
 401  */
 402 static void playlist_new_changed(const char attribute((unused)) *event,
 403                                  void attribute((unused)) *eventdata,
 404                                  void attribute((unused)) *callbackdata) {
 405   if(!playlist_new_window)
 406     return;
 407   const char *reason = playlist_new_valid();
 408   gtk_widget_set_sensitive(playlist_new_buttons[0].widget,
 409                            !reason);
 410   gtk_label_set_text(GTK_LABEL(playlist_new_info), reason);
 411 }
 412
 413 /** @brief Called when some radio button in the new-playlist popup changes */
 414 static void playlist_new_button_toggled(GtkToggleButton attribute((unused)) tb,
 415                                         gpointer attribute((unused)) userdata) {
 416   playlist_new_changed(0,0,0);
 417 }
 418
 419 /** @brief Called when the text entry field in the new-playlist popup changes */
 420 static void playlist_new_entry_edited(GtkEditable attribute((unused)) *editable,
 421                                       gpointer attribute((unused)) user_data) {
 422   playlist_new_changed(0,0,0);
 423 }
 424
 425 /** @brief Pop up a new window to enter the playlist name and details */
 426 static void playlist_new_playlist(void) {
 427   assert(playlist_new_window == NULL);
 428   playlist_new_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 429   g_signal_connect(playlist_new_window, "destroy",
 430                    G_CALLBACK(gtk_widget_destroyed), &playlist_new_window);
 431   gtk_window_set_title(GTK_WINDOW(playlist_new_window), "Create new playlist");
 432   /* Window will be modal, suppressing access to other windows */
 433   gtk_window_set_modal(GTK_WINDOW(playlist_new_window), TRUE);
 434   gtk_window_set_transient_for(GTK_WINDOW(playlist_new_window),
 435                                GTK_WINDOW(playlist_window));
 436
 437   /* Window contents will use a table (grid) layout */
 438   GtkWidget *table = gtk_table_new(3, 3, FALSE/*!homogeneous*/);
 439
 440   /* First row: playlist name */
 441   gtk_table_attach_defaults(GTK_TABLE(table),
 442                             gtk_label_new("Playlist name"),
 443                             0, 1, 0, 1);
 444   playlist_new_entry = gtk_entry_new();
 445   g_signal_connect(playlist_new_entry, "changed",
 446                    G_CALLBACK(playlist_new_entry_edited), NULL);
 447   gtk_table_attach_defaults(GTK_TABLE(table),
 448                             playlist_new_entry,
 449                             1, 3, 0, 1);
 450
 451   /* Second row: radio buttons to choose type */
 452   playlist_new_shared = gtk_radio_button_new_with_label(NULL, "shared");
 453   playlist_new_public
 454     = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(playlist_new_shared),
 455                                                   "public");
 456   playlist_new_private
 457     = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(playlist_new_shared),
 458                                                   "private");
 459   g_signal_connect(playlist_new_shared, "toggled",
 460                    G_CALLBACK(playlist_new_button_toggled), NULL);
 461   g_signal_connect(playlist_new_public, "toggled",
 462                    G_CALLBACK(playlist_new_button_toggled), NULL);
 463   g_signal_connect(playlist_new_private, "toggled",
 464                    G_CALLBACK(playlist_new_button_toggled), NULL);
 465   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_shared, 0, 1, 1, 2);
 466   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_public, 1, 2, 1, 2);
 467   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_private, 2, 3, 1, 2);
 468
 469   /* Third row: info bar saying why not */
 470   playlist_new_info = gtk_label_new("");
 471   gtk_table_attach_defaults(GTK_TABLE(table), playlist_new_info,
 472                             0, 3, 2, 3);
 473
 474   /* Fourth row: ok/cancel buttons */
 475   GtkWidget *hbox = create_buttons_box(playlist_new_buttons,
 476                                        NPLAYLIST_NEW_BUTTONS,
 477                                        gtk_hbox_new(FALSE, 0));
 478   gtk_table_attach_defaults(GTK_TABLE(table), hbox, 0, 3, 3, 4);
 479
 480   gtk_container_add(GTK_CONTAINER(playlist_new_window),
 481                     frame_widget(table, NULL));
 482
 483   /* Set initial state of OK button */
 484   playlist_new_changed(0,0,0);
 485
 486   /* TODO: return should = OK, escape should = cancel */
 487
 488   /* Display the window */
 489   gtk_widget_show_all(playlist_new_window);
 490 }
 491
 492 /* Playlist picker ---------------------------------------------------------- */
 493
 494 /** @brief Delete button */
 495 static GtkWidget *playlist_picker_delete_button;
 496
 497 /** @brief Tree model for list of playlists */
 498 static GtkListStore *playlist_picker_list;
 499
 500 /** @brief Selection for list of playlists */
 501 static GtkTreeSelection *playlist_picker_selection;
 502
 503 /** @brief Currently selected playlist */
 504 static const char *playlist_picker_selected;
 505
 506 /** @brief (Re-)populate the playlist picker tree model */
 507 static void playlist_picker_fill(const char attribute((unused)) *event,
 508                                  void attribute((unused)) *eventdata,
 509                                  void attribute((unused)) *callbackdata) {
 510   GtkTreeIter iter[1];
 511
 512   if(!playlist_window)
 513     return;
 514   if(!playlist_picker_list)
 515     playlist_picker_list = gtk_list_store_new(1, G_TYPE_STRING);
 516   const char *was_selected = playlist_picker_selected;
 517   gtk_list_store_clear(playlist_picker_list); /* clears playlists_selected */
 518   for(int n = 0; n < nplaylists; ++n) {
 519     gtk_list_store_insert_with_values(playlist_picker_list, iter,
 520                                       n                /*position*/,
 521                                       0, playlists[n], /* column 0 */
 522                                       -1);             /* no more cols */
 523     /* Reselect the selected playlist */
 524     if(was_selected && !strcmp(was_selected, playlists[n]))
 525       gtk_tree_selection_select_iter(playlist_picker_selection, iter);
 526   }
 527   /* TODO deselecting then reselecting the current playlist resets the playlist
 528    * editor, which trashes the user's selection. */
 529 }
 530
 531 /** @brief Called when the selection might have changed */
 532 static void playlist_picker_selection_changed(GtkTreeSelection attribute((unused)) *treeselection,
 533                                               gpointer attribute((unused)) user_data) {
 534   GtkTreeIter iter;
 535   char *gselected, *selected;
 536
 537   /* Identify the current selection */
 538   if(gtk_tree_selection_get_selected(playlist_picker_selection, 0, &iter)) {
 539     gtk_tree_model_get(GTK_TREE_MODEL(playlist_picker_list), &iter,
 540                        0, &gselected, -1);
 541     selected = xstrdup(gselected);
 542     g_free(gselected);
 543   } else
 544     selected = 0;
 545   /* Set button sensitivity according to the new state */
 546   if(selected)
 547     gtk_widget_set_sensitive(playlist_picker_delete_button, 1);
 548   else
 549     gtk_widget_set_sensitive(playlist_picker_delete_button, 0);
 550   /* Eliminate no-change cases */
 551   if(!selected && !playlist_picker_selected)
 552     return;
 553   if(selected
 554      && playlist_picker_selected
 555      && !strcmp(selected, playlist_picker_selected))
 556     return;
 557   /* Record the new state */
 558   playlist_picker_selected = selected;
 559   /* Re-initalize the queue */
 560   ql_new_queue(&ql_playlist, NULL);
 561   playlist_editor_fill(NULL, (void *)playlist_picker_selected, NULL);
 562 }
 563
 564 /** @brief Called when the 'add' button is pressed */
 565 static void playlist_picker_add(GtkButton attribute((unused)) *button,
 566                                 gpointer attribute((unused)) userdata) {
 567   /* Unselect whatever is selected TODO why?? */
 568   gtk_tree_selection_unselect_all(playlist_picker_selection);
 569   playlist_new_playlist();
 570 }
 571
 572 /** @brief Called when playlist deletion completes */
 573 static void playlists_picker_delete_completed(void attribute((unused)) *v,
 574                                               const char *err) {
 575   if(err)
 576     popup_protocol_error(0, err);
 577 }
 578
 579 /** @brief Called when the 'Delete' button is pressed */
 580 static void playlist_picker_delete(GtkButton attribute((unused)) *button,
 581                                    gpointer attribute((unused)) userdata) {
 582   GtkWidget *yesno;
 583   int res;
 584
 585   if(!playlist_picker_selected)
 586     return;                             /* shouldn't happen */
 587   yesno = gtk_message_dialog_new(GTK_WINDOW(playlist_window),
 588                                  GTK_DIALOG_MODAL,
 589                                  GTK_MESSAGE_QUESTION,
 590                                  GTK_BUTTONS_YES_NO,
 591                                  "Do you really want to delete playlist %s?"
 592                                  " This action cannot be undone.",
 593                                  playlist_picker_selected);
 594   res = gtk_dialog_run(GTK_DIALOG(yesno));
 595   gtk_widget_destroy(yesno);
 596   if(res == GTK_RESPONSE_YES) {
 597     disorder_eclient_playlist_delete(client,
 598                                      playlists_picker_delete_completed,
 599                                      playlist_picker_selected,
 600                                      NULL);
 601   }
 602 }
 603
 604 /** @brief Table of buttons below the playlist list */
 605 static struct button playlist_picker_buttons[] = {
 606   {
 607     GTK_STOCK_ADD,
 608     playlist_picker_add,
 609     "Create a new playlist",
 610     0
 611   },
 612   {
 613     GTK_STOCK_REMOVE,
 614     playlist_picker_delete,
 615     "Delete a playlist",
 616     0
 617   },
 618 };
 619 #define NPLAYLIST_PICKER_BUTTONS (sizeof playlist_picker_buttons / sizeof *playlist_picker_buttons)
 620
 621 /** @brief Create the list of playlists for the edit playlists window */
 622 static GtkWidget *playlist_picker_create(void) {
 623   /* Create the list of playlist and populate it */
 624   playlist_picker_fill(NULL, NULL, NULL);
 625   /* Create the tree view */
 626   GtkWidget *tree = gtk_tree_view_new_with_model(GTK_TREE_MODEL(playlist_picker_list));
 627   /* ...and the renderers for it */
 628   GtkCellRenderer *cr = gtk_cell_renderer_text_new();
 629   GtkTreeViewColumn *col = gtk_tree_view_column_new_with_attributes("Playlist",
 630                                                                     cr,
 631                                                                     "text", 0,
 632                                                                     NULL);
 633   gtk_tree_view_append_column(GTK_TREE_VIEW(tree), col);
 634   /* Get the selection for the view; set its mode; arrange for a callback when
 635    * it changes */
 636   playlist_picker_selected = NULL;
 637   playlist_picker_selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(tree));
 638   gtk_tree_selection_set_mode(playlist_picker_selection, GTK_SELECTION_BROWSE);
 639   g_signal_connect(playlist_picker_selection, "changed",
 640                    G_CALLBACK(playlist_picker_selection_changed), NULL);
 641
 642   /* Create the control buttons */
 643   GtkWidget *buttons = create_buttons_box(playlist_picker_buttons,
 644                                           NPLAYLIST_PICKER_BUTTONS,
 645                                           gtk_hbox_new(FALSE, 1));
 646   playlist_picker_delete_button = playlist_picker_buttons[1].widget;
 647
 648   playlist_picker_selection_changed(NULL, NULL);
 649
 650   /* Buttons live below the list */
 651   GtkWidget *vbox = gtk_vbox_new(FALSE, 0);
 652   gtk_box_pack_start(GTK_BOX(vbox), scroll_widget(tree), TRUE/*expand*/, TRUE/*fill*/, 0);
 653   gtk_box_pack_start(GTK_BOX(vbox), buttons, FALSE/*expand*/, FALSE, 0);
 654
 655   return vbox;
 656 }
 657
 658 /* Playlist editor ---------------------------------------------------------- */
 659
 660 /** @brief Called with new tracks for the playlist */
 661 static void playlists_editor_received_tracks(void *v,
 662                                              const char *err,
 663                                              int nvec, char **vec) {
 664   const char *playlist = v;
 665   if(err) {
 666     popup_protocol_error(0, err);
 667     return;
 668   }
 669   if(!playlist_picker_selected
 670      || strcmp(playlist, playlist_picker_selected)) {
 671     /* The tracks are for the wrong playlist - something must have changed
 672      * while the fetch command was in flight.  We just ignore this callback,
 673      * the right answer will be requested and arrive in due course. */
 674     return;
 675   }
 676   if(nvec == -1)
 677     /* No such playlist, presumably we'll get a deleted event shortly */
 678     return;
 679   /* Translate the list of tracks into queue entries */
 680   struct queue_entry *newq, **qq = &newq;
 681   hash *h = hash_new(sizeof(int));
 682   for(int n = 0; n < nvec; ++n) {
 683     struct queue_entry *q = xmalloc(sizeof *q);
 684     q->track = vec[n];
 685     /* Synthesize a unique ID so that the selection survives updates.  Tracks
 686      * can appear more than once in the queue so we can't use raw track names,
 687      * so we add a serial number to the start. */
 688     int *serialp = hash_find(h, vec[n]), serial = serialp ? *serialp : 0;
 689     byte_xasprintf((char **)&q->id, "%d-%s", serial++, vec[n]);
 690     hash_add(h, vec[0], &serial, HASH_INSERT_OR_REPLACE);
 691     *qq = q;
 692     qq = &q->next;
 693   }
 694   *qq = NULL;
 695   ql_new_queue(&ql_playlist, newq);
 696 }
 697
 698 /** @brief (Re-)populate the playlist tree model */
 699 static void playlist_editor_fill(const char attribute((unused)) *event,
 700                                  void *eventdata,
 701                                  void attribute((unused)) *callbackdata) {
 702   const char *modified_playlist = eventdata;
 703   if(!playlist_window)
 704     return;
 705   if(!playlist_picker_selected)
 706     return;
 707   if(!strcmp(playlist_picker_selected, modified_playlist))
 708     disorder_eclient_playlist_get(client, playlists_editor_received_tracks,
 709                                   playlist_picker_selected,
 710                                   (void *)playlist_picker_selected);
 711 }
 712
 713 static GtkWidget *playlists_editor_create(void) {
 714   assert(ql_playlist.view == NULL);     /* better not be set up already */
 715   GtkWidget *w = init_queuelike(&ql_playlist);
 716   /* Initially empty */
 717   return w;
 718 }
 719
 720 /* Playlist editor right-click menu ---------------------------------------- */
 721
 722 /** @brief Called to determine whether the playlist is playable */
 723 static int playlist_playall_sensitive(void attribute((unused)) *extra) {
 724   /* If there's no playlist obviously we can't play it */
 725   if(!playlist_picker_selected)
 726     return FALSE;
 727   /* If it's empty we can't play it */
 728   if(!ql_playlist.q)
 729     return FALSE;
 730   /* Otherwise we can */
 731   return TRUE;
 732 }
 733
 734 /** @brief Called to play the selected playlist */
 735 static void playlist_playall_activate(GtkMenuItem attribute((unused)) *menuitem,
 736                                       gpointer attribute((unused)) user_data) {
 737   if(!playlist_picker_selected)
 738     return;
 739   /* Re-use the menu-based activation callback */
 740   disorder_eclient_playlist_get(client, playlist_menu_received_content,
 741                                 playlist_picker_selected, NULL);
 742 }
 743
 744 /** @brief Called to determine whether the playlist is playable */
 745 static int playlist_remove_sensitive(void attribute((unused)) *extra) {
 746   /* If there's no playlist obviously we can't remove from it */
 747   if(!playlist_picker_selected)
 748     return FALSE;
 749   /* If no tracks are selected we cannot remove them */
 750   if(!gtk_tree_selection_count_selected_rows(ql_playlist.selection))
 751     return FALSE;
 752   /* We're good to go */
 753   return TRUE;
 754 }
 755
 756 /** @brief Called to play the selected playlist */
 757 static void playlist_remove_activate(GtkMenuItem attribute((unused)) *menuitem,
 758                                      gpointer attribute((unused)) user_data) {
 759   if(!playlist_picker_selected)
 760     return;
 761   /* To safely remove rows we must:
 762    * - take a lock
 763    * - fetch the playlist
 764    * - delete the selected rows
 765    * - store the playlist
 766    * - release the lock
 767    */
 768   fprintf(stderr, "remove tracks\n");   /* TODO */
 769 }
 770
 771 /* Playlists window --------------------------------------------------------- */
 772
 773 /** @brief Keypress handler */
 774 static gboolean playlist_window_keypress(GtkWidget attribute((unused)) *widget,
 775                                          GdkEventKey *event,
 776                                          gpointer attribute((unused)) user_data) {
 777   if(event->state)
 778     return FALSE;
 779   switch(event->keyval) {
 780   case GDK_Escape:
 781     gtk_widget_destroy(playlist_window);
 782     return TRUE;
 783   default:
 784     return FALSE;
 785   }
 786 }
 787
 788 /** @brief Called when the playlist window is destroyed */
 789 static void playlist_window_destroyed(GtkWidget attribute((unused)) *widget,
 790                                       GtkWidget **widget_pointer) {
 791   destroy_queuelike(&ql_playlist);
 792   *widget_pointer = NULL;
 793 }
 794
 795 /** @brief Pop up the playlists window
 796  *
 797  * Called when the playlists menu item is selected
 798  */
 799 void playlist_window_create(gpointer attribute((unused)) callback_data,
 800                             guint attribute((unused)) callback_action,
 801                             GtkWidget attribute((unused)) *menu_item) {
 802   /* If the window already exists, raise it */
 803   if(playlist_window) {
 804     gtk_window_present(GTK_WINDOW(playlist_window));
 805     return;
 806   }
 807   /* Create the window */
 808   playlist_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 809   gtk_widget_set_style(playlist_window, tool_style);
 810   g_signal_connect(playlist_window, "destroy",
 811                    G_CALLBACK(playlist_window_destroyed), &playlist_window);
 812   gtk_window_set_title(GTK_WINDOW(playlist_window), "Playlists Management");
 813   /* TODO loads of this is very similar to (copied from!) users.c - can we
 814    * de-dupe? */
 815   /* Keyboard shortcuts */
 816   g_signal_connect(playlist_window, "key-press-event",
 817                    G_CALLBACK(playlist_window_keypress), 0);
 818   /* default size is too small */
 819   gtk_window_set_default_size(GTK_WINDOW(playlist_window), 512, 240);
 820
 821   GtkWidget *hbox = gtk_hbox_new(FALSE, 0);
 822   gtk_box_pack_start(GTK_BOX(hbox), playlist_picker_create(),
 823                      FALSE/*expand*/, FALSE, 0);
 824   gtk_box_pack_start(GTK_BOX(hbox), gtk_event_box_new(),
 825                      FALSE/*expand*/, FALSE, 2);
 826   gtk_box_pack_start(GTK_BOX(hbox), playlists_editor_create(),
 827                      TRUE/*expand*/, TRUE/*fill*/, 0);
 828
 829   gtk_container_add(GTK_CONTAINER(playlist_window), frame_widget(hbox, NULL));
 830   gtk_widget_show_all(playlist_window);
 831 }
 832
 833 /** @brief Initialize playlist support */
 834 void playlists_init(void) {
 835   /* We re-get all playlists upon any change... */
 836   event_register("playlist-created", playlist_list_update, 0);
 837   event_register("playlist-deleted", playlist_list_update, 0);
 838   /* ...and on reconnection */
 839   event_register("log-connected", playlist_list_update, 0);
 840   /* ...and from time to time */
 841   event_register("periodic-slow", playlist_list_update, 0);
 842   /* ...and at startup */
 843   playlist_list_update(0, 0, 0);
 844
 845   /* Update the playlists menu when the set of playlists changes */
 846   event_register("playlists-updated", playlist_menu_changed, 0);
 847   /* Update the new-playlist OK button when the set of playlists changes */
 848   event_register("playlists-updated", playlist_new_changed, 0);
 849   /* Update the list of playlists in the edit window when the set changes */
 850   event_register("playlists-updated", playlist_picker_fill, 0);
 851   /* Update the displayed playlist when it is modified */
 852   event_register("playlist-modified", playlist_editor_fill, 0);
 853 }
 854
 855 #endif
 856
 857 /*
 858 Local Variables:
 859 c-basic-offset:2
 860 comment-column:40
 861 fill-column:79
 862 indent-tabs-mode:nil
 863 End:
 864 */