src/screen_queue.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2017 The Music Player Daemon Project
   3  * Project homepage: http://musicpd.org
   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,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #include "screen_queue.h"
  21 #include "screen_interface.h"
  22 #include "screen_file.h"
  23 #include "screen_status.h"
  24 #include "screen_find.h"
  25 #include "save_playlist.h"
  26 #include "config.h"
  27 #include "i18n.h"
  28 #include "charset.h"
  29 #include "options.h"
  30 #include "mpdclient.h"
  31 #include "utils.h"
  32 #include "strfsong.h"
  33 #include "wreadln.h"
  34 #include "song_paint.h"
  35 #include "screen.h"
  36 #include "screen_utils.h"
  37 #include "screen_song.h"
  38 #include "screen_lyrics.h"
  39 #include "Compiler.h"
  40
  41 #ifndef NCMPC_MINI
  42 #include "hscroll.h"
  43 #endif
  44
  45 #include <mpd/client.h>
  46
  47 #include <ctype.h>
  48 #include <string.h>
  49 #include <glib.h>
  50
  51 #define MAX_SONG_LENGTH 512
  52
  53 #ifndef NCMPC_MINI
  54 typedef struct
  55 {
  56         GList **list;
  57         GList **dir_list;
  58         struct mpdclient *c;
  59 } completion_callback_data_t;
  60
  61 static struct hscroll hscroll;
  62 #endif
  63
  64 static struct mpdclient_playlist *playlist;
  65 static int current_song_id = -1;
  66 static int selected_song_id = -1;
  67 static struct list_window *lw;
  68 static guint timer_hide_cursor_id;
  69
  70 static void
  71 screen_queue_paint(void);
  72
  73 static void
  74 screen_queue_repaint(void)
  75 {
  76         screen_queue_paint();
  77         wrefresh(lw->w);
  78 }
  79
  80 static const struct mpd_song *
  81 screen_queue_selected_song(void)
  82 {
  83         return !lw->range_selection &&
  84                 lw->selected < playlist_length(playlist)
  85                 ? playlist_get(playlist, lw->selected)
  86                 : NULL;
  87 }
  88
  89 static void
  90 screen_queue_save_selection(void)
  91 {
  92         selected_song_id = screen_queue_selected_song() != NULL
  93                 ? (int)mpd_song_get_id(screen_queue_selected_song())
  94                 : -1;
  95 }
  96
  97 static void
  98 screen_queue_restore_selection(void)
  99 {
 100         list_window_set_length(lw, playlist_length(playlist));
 101
 102         if (selected_song_id < 0)
 103                 /* there was no selection */
 104                 return;
 105
 106         const struct mpd_song *song = screen_queue_selected_song();
 107         if (song != NULL &&
 108             mpd_song_get_id(song) == (unsigned)selected_song_id)
 109                 /* selection is still valid */
 110                 return;
 111
 112         int pos = playlist_get_index_from_id(playlist, selected_song_id);
 113         if (pos >= 0)
 114                 list_window_set_cursor(lw, pos);
 115
 116         screen_queue_save_selection();
 117 }
 118
 119 static const char *
 120 screen_queue_lw_callback(unsigned idx, gcc_unused void *data)
 121 {
 122         static char songname[MAX_SONG_LENGTH];
 123
 124         assert(playlist != NULL);
 125         assert(idx < playlist_length(playlist));
 126
 127         struct mpd_song *song = playlist_get(playlist, idx);
 128
 129         strfsong(songname, MAX_SONG_LENGTH, options.list_format, song);
 130
 131         return songname;
 132 }
 133
 134 static void
 135 center_playing_item(const struct mpd_status *status, bool center_cursor)
 136 {
 137         if (status == NULL ||
 138             (mpd_status_get_state(status) != MPD_STATE_PLAY &&
 139              mpd_status_get_state(status) != MPD_STATE_PAUSE))
 140                 return;
 141
 142         /* try to center the song that are playing */
 143         int idx = mpd_status_get_song_pos(status);
 144         if (idx < 0)
 145                 return;
 146
 147         list_window_center(lw, idx);
 148
 149         if (center_cursor) {
 150                 list_window_set_cursor(lw, idx);
 151                 return;
 152         }
 153
 154         /* make sure the cursor is in the window */
 155         list_window_fetch_cursor(lw);
 156 }
 157
 158 gcc_pure
 159 static int
 160 get_current_song_id(const struct mpd_status *status)
 161 {
 162         return status != NULL &&
 163                 (mpd_status_get_state(status) == MPD_STATE_PLAY ||
 164                  mpd_status_get_state(status) == MPD_STATE_PAUSE)
 165                 ? (int)mpd_status_get_song_id(status)
 166                 : -1;
 167 }
 168
 169 static bool
 170 screen_queue_song_change(const struct mpd_status *status)
 171 {
 172         if (get_current_song_id(status) == current_song_id)
 173                 return false;
 174
 175         current_song_id = get_current_song_id(status);
 176
 177         /* center the cursor */
 178         if (options.auto_center && !lw->range_selection)
 179                 center_playing_item(status, false);
 180
 181         return true;
 182 }
 183
 184 #ifndef NCMPC_MINI
 185 /**
 186  * Wrapper for strncmp().  We are not allowed to pass &strncmp to
 187  * g_completion_set_compare(), because strncmp() takes size_t where
 188  * g_completion_set_compare passes a gsize value.
 189  */
 190 static gint
 191 completion_strncmp(const gchar *s1, const gchar *s2, gsize n)
 192 {
 193         return strncmp(s1, s2, n);
 194 }
 195 #endif
 196
 197 #ifndef NCMPC_MINI
 198 static void add_dir(GCompletion *gcmp, gchar *dir, GList **dir_list,
 199                     GList **list, struct mpdclient *c)
 200 {
 201         g_completion_remove_items(gcmp, *list);
 202         *list = string_list_remove(*list, dir);
 203         *list = gcmp_list_from_path(c, dir, *list, GCMP_TYPE_RFILE);
 204         g_completion_add_items(gcmp, *list);
 205         *dir_list = g_list_append(*dir_list, g_strdup(dir));
 206 }
 207
 208 static void add_pre_completion_cb(GCompletion *gcmp, gchar *line, void *data)
 209 {
 210         completion_callback_data_t *tmp = (completion_callback_data_t *)data;
 211         GList **dir_list = tmp->dir_list;
 212         GList **list = tmp->list;
 213         struct mpdclient *c = tmp->c;
 214
 215         if (*list == NULL) {
 216                 /* create initial list */
 217                 *list = gcmp_list_from_path(c, "", NULL, GCMP_TYPE_RFILE);
 218                 g_completion_add_items(gcmp, *list);
 219         } else if (line && line[0] && line[strlen(line)-1]=='/' &&
 220                    string_list_find(*dir_list, line) == NULL) {
 221                 /* add directory content to list */
 222                 add_dir(gcmp, line, dir_list, list, c);
 223         }
 224 }
 225
 226 static void add_post_completion_cb(GCompletion *gcmp, gchar *line,
 227                                    GList *items, void *data)
 228 {
 229         completion_callback_data_t *tmp = (completion_callback_data_t *)data;
 230         GList **dir_list = tmp->dir_list;
 231         GList **list = tmp->list;
 232         struct mpdclient *c = tmp->c;
 233
 234         if (g_list_length(items) >= 1)
 235                 screen_display_completion_list(items);
 236
 237         if (line && line[0] && line[strlen(line) - 1] == '/' &&
 238             string_list_find(*dir_list, line) == NULL) {
 239                 /* add directory content to list */
 240                 add_dir(gcmp, line, dir_list, list, c);
 241         }
 242 }
 243 #endif
 244
 245 static int
 246 handle_add_to_playlist(struct mpdclient *c)
 247 {
 248 #ifndef NCMPC_MINI
 249         /* initialize completion support */
 250         GCompletion *gcmp = g_completion_new(NULL);
 251         g_completion_set_compare(gcmp, completion_strncmp);
 252
 253         GList *list = NULL;
 254         GList *dir_list = NULL;
 255         completion_callback_data_t data = {
 256                 .list = &list,
 257                 .dir_list = &dir_list,
 258                 .c = c,
 259         };
 260
 261         wrln_completion_callback_data = &data;
 262         wrln_pre_completion_callback = add_pre_completion_cb;
 263         wrln_post_completion_callback = add_post_completion_cb;
 264 #else
 265         GCompletion *gcmp = NULL;
 266 #endif
 267
 268         /* get path */
 269         char *path = screen_readln(_("Add"),
 270                                    NULL,
 271                                    NULL,
 272                                    gcmp);
 273
 274         /* destroy completion data */
 275 #ifndef NCMPC_MINI
 276         wrln_completion_callback_data = NULL;
 277         wrln_pre_completion_callback = NULL;
 278         wrln_post_completion_callback = NULL;
 279         g_completion_free(gcmp);
 280         string_list_free(list);
 281         string_list_free(dir_list);
 282 #endif
 283
 284         /* add the path to the playlist */
 285         if (path != NULL) {
 286                 char *path_utf8 = locale_to_utf8(path);
 287                 mpdclient_cmd_add_path(c, path_utf8);
 288                 g_free(path_utf8);
 289         }
 290
 291         g_free(path);
 292         return 0;
 293 }
 294
 295 static void
 296 screen_queue_init(WINDOW *w, unsigned cols, unsigned rows)
 297 {
 298         lw = list_window_init(w, cols, rows);
 299
 300 #ifndef NCMPC_MINI
 301         if (options.scroll)
 302                 hscroll_init(&hscroll, w, options.scroll_sep);
 303 #endif
 304 }
 305
 306 static gboolean
 307 timer_hide_cursor(gpointer data)
 308 {
 309         struct mpdclient *c = data;
 310
 311         assert(options.hide_cursor > 0);
 312         assert(timer_hide_cursor_id != 0);
 313
 314         timer_hide_cursor_id = 0;
 315
 316         /* hide the cursor when mpd is playing and the user is inactive */
 317
 318         if (c->status != NULL &&
 319             mpd_status_get_state(c->status) == MPD_STATE_PLAY) {
 320                 lw->hide_cursor = true;
 321                 screen_queue_repaint();
 322         } else
 323                 timer_hide_cursor_id = g_timeout_add_seconds(options.hide_cursor,
 324                                                              timer_hide_cursor, c);
 325
 326         return FALSE;
 327 }
 328
 329 static void
 330 screen_queue_open(struct mpdclient *c)
 331 {
 332         playlist = &c->playlist;
 333
 334         assert(timer_hide_cursor_id == 0);
 335         if (options.hide_cursor > 0) {
 336                 lw->hide_cursor = false;
 337                 timer_hide_cursor_id = g_timeout_add_seconds(options.hide_cursor,
 338                                                              timer_hide_cursor, c);
 339         }
 340
 341         screen_queue_restore_selection();
 342         screen_queue_song_change(c->status);
 343 }
 344
 345 static void
 346 screen_queue_close(void)
 347 {
 348         if (timer_hide_cursor_id != 0) {
 349                 g_source_remove(timer_hide_cursor_id);
 350                 timer_hide_cursor_id = 0;
 351         }
 352
 353 #ifndef NCMPC_MINI
 354         if (options.scroll)
 355                 hscroll_clear(&hscroll);
 356 #endif
 357 }
 358
 359 static void
 360 screen_queue_resize(unsigned cols, unsigned rows)
 361 {
 362         list_window_resize(lw, cols, rows);
 363 }
 364
 365
 366 static void
 367 screen_queue_exit(void)
 368 {
 369         list_window_free(lw);
 370 }
 371
 372 static const char *
 373 screen_queue_title(char *str, size_t size)
 374 {
 375         if (options.host == NULL)
 376                 return _("Queue");
 377
 378         g_snprintf(str, size, _("Queue on %s"), options.host);
 379         return str;
 380 }
 381
 382 static void
 383 screen_queue_paint_callback(WINDOW *w, unsigned i,
 384                             unsigned y, unsigned width,
 385                             bool selected, gcc_unused const void *data)
 386 {
 387         assert(playlist != NULL);
 388         assert(i < playlist_length(playlist));
 389
 390         const struct mpd_song *song = playlist_get(playlist, i);
 391
 392         struct hscroll *row_hscroll = NULL;
 393 #ifndef NCMPC_MINI
 394         row_hscroll = selected && options.scroll && lw->selected == i
 395                 ? &hscroll : NULL;
 396 #endif
 397
 398         paint_song_row(w, y, width, selected,
 399                        (int)mpd_song_get_id(song) == current_song_id,
 400                        song, row_hscroll, options.list_format);
 401 }
 402
 403 static void
 404 screen_queue_paint(void)
 405 {
 406 #ifndef NCMPC_MINI
 407         if (options.scroll)
 408                 hscroll_clear(&hscroll);
 409 #endif
 410
 411         list_window_paint2(lw, screen_queue_paint_callback, NULL);
 412 }
 413
 414 static void
 415 screen_queue_update(struct mpdclient *c)
 416 {
 417         if (c->events & MPD_IDLE_QUEUE)
 418                 screen_queue_restore_selection();
 419         else
 420                 /* the queue size may have changed, even if we havn't
 421                    received the QUEUE idle event yet */
 422                 list_window_set_length(lw, playlist_length(playlist));
 423
 424         if (((c->events & MPD_IDLE_PLAYER) != 0 &&
 425              screen_queue_song_change(c->status)) ||
 426             c->events & MPD_IDLE_QUEUE)
 427                 /* the queue or the current song has changed, we must
 428                    paint the new version */
 429                 screen_queue_paint();
 430 }
 431
 432 #ifdef HAVE_GETMOUSE
 433 static bool
 434 handle_mouse_event(struct mpdclient *c)
 435 {
 436         unsigned long bstate;
 437         int row;
 438         if (screen_get_mouse_event(c, &bstate, &row) ||
 439             list_window_mouse(lw, bstate, row)) {
 440                 screen_queue_paint();
 441                 return true;
 442         }
 443
 444         if (bstate & BUTTON1_DOUBLE_CLICKED) {
 445                 /* stop */
 446                 screen_cmd(c, CMD_STOP);
 447                 return true;
 448         }
 449
 450         const unsigned old_selected = lw->selected;
 451         list_window_set_cursor(lw, lw->start + row);
 452
 453         if (bstate & BUTTON1_CLICKED) {
 454                 /* play */
 455                 const struct mpd_song *song = screen_queue_selected_song();
 456                 if (song != NULL) {
 457                         struct mpd_connection *connection =
 458                                 mpdclient_get_connection(c);
 459
 460                         if (connection != NULL &&
 461                             !mpd_run_play_id(connection,
 462                                              mpd_song_get_id(song)))
 463                                 mpdclient_handle_error(c);
 464                 }
 465         } else if (bstate & BUTTON3_CLICKED) {
 466                 /* delete */
 467                 if (lw->selected == old_selected)
 468                         mpdclient_cmd_delete(c, lw->selected);
 469
 470                 list_window_set_length(lw, playlist_length(playlist));
 471         }
 472
 473         screen_queue_save_selection();
 474         screen_queue_paint();
 475
 476         return true;
 477 }
 478 #endif
 479
 480 static bool
 481 screen_queue_cmd(struct mpdclient *c, command_t cmd)
 482 {
 483         struct mpd_connection *connection;
 484         static command_t cached_cmd = CMD_NONE;
 485
 486         const command_t prev_cmd = cached_cmd;
 487         cached_cmd = cmd;
 488
 489         lw->hide_cursor = false;
 490
 491         if (options.hide_cursor > 0) {
 492                 if (timer_hide_cursor_id != 0)
 493                         g_source_remove(timer_hide_cursor_id);
 494                 timer_hide_cursor_id = g_timeout_add_seconds(options.hide_cursor,
 495                                                              timer_hide_cursor, c);
 496         }
 497
 498         if (list_window_cmd(lw, cmd)) {
 499                 screen_queue_save_selection();
 500                 screen_queue_paint();
 501                 return true;
 502         }
 503
 504         switch(cmd) {
 505         case CMD_SCREEN_UPDATE:
 506                 center_playing_item(c->status, prev_cmd == CMD_SCREEN_UPDATE);
 507                 screen_queue_paint();
 508                 return false;
 509         case CMD_SELECT_PLAYING:
 510                 list_window_set_cursor(lw, playlist_get_index(&c->playlist,
 511                                                               c->song));
 512                 screen_queue_save_selection();
 513                 screen_queue_paint();
 514                 return true;
 515
 516         case CMD_LIST_FIND:
 517         case CMD_LIST_RFIND:
 518         case CMD_LIST_FIND_NEXT:
 519         case CMD_LIST_RFIND_NEXT:
 520                 screen_find(lw, cmd, screen_queue_lw_callback, NULL);
 521                 screen_queue_save_selection();
 522                 screen_queue_paint();
 523                 return true;
 524         case CMD_LIST_JUMP:
 525                 screen_jump(lw, screen_queue_lw_callback, NULL, NULL, NULL);
 526                 screen_queue_save_selection();
 527                 screen_queue_paint();
 528                 return true;
 529
 530 #ifdef HAVE_GETMOUSE
 531         case CMD_MOUSE_EVENT:
 532                 return handle_mouse_event(c);
 533 #endif
 534
 535 #ifdef ENABLE_SONG_SCREEN
 536         case CMD_SCREEN_SONG:
 537                 if (screen_queue_selected_song() != NULL) {
 538                         screen_song_switch(c, screen_queue_selected_song());
 539                         return true;
 540                 }
 541
 542                 break;
 543 #endif
 544
 545 #ifdef ENABLE_LYRICS_SCREEN
 546         case CMD_SCREEN_LYRICS:
 547                 if (lw->selected < playlist_length(&c->playlist)) {
 548                         struct mpd_song *selected = playlist_get(&c->playlist, lw->selected);
 549                         bool follow = false;
 550
 551                         if (c->song && selected &&
 552                             !strcmp(mpd_song_get_uri(selected),
 553                                     mpd_song_get_uri(c->song)))
 554                                 follow = true;
 555
 556                         screen_lyrics_switch(c, selected, follow);
 557                         return true;
 558                 }
 559
 560                 break;
 561 #endif
 562         case CMD_SCREEN_SWAP:
 563                 if (playlist_length(&c->playlist) > 0)
 564                         screen_swap(c, playlist_get(&c->playlist, lw->selected));
 565                 else
 566                         screen_swap(c, NULL);
 567                 return true;
 568
 569         default:
 570                 break;
 571         }
 572
 573         if (!mpdclient_is_connected(c))
 574                 return false;
 575
 576         switch(cmd) {
 577                 const struct mpd_song *song;
 578                 struct list_window_range range;
 579
 580         case CMD_PLAY:
 581                 song = screen_queue_selected_song();
 582                 if (song == NULL)
 583                         return false;
 584
 585                 connection = mpdclient_get_connection(c);
 586                 if (connection != NULL &&
 587                     !mpd_run_play_id(connection, mpd_song_get_id(song)))
 588                         mpdclient_handle_error(c);
 589
 590                 return true;
 591
 592         case CMD_DELETE:
 593                 list_window_get_range(lw, &range);
 594                 mpdclient_cmd_delete_range(c, range.start, range.end);
 595
 596                 list_window_set_cursor(lw, range.start);
 597                 return true;
 598
 599         case CMD_SAVE_PLAYLIST:
 600                 playlist_save(c, NULL, NULL);
 601                 return true;
 602
 603         case CMD_ADD:
 604                 handle_add_to_playlist(c);
 605                 return true;
 606
 607         case CMD_SHUFFLE:
 608                 list_window_get_range(lw, &range);
 609                 if (range.end <= range.start + 1)
 610                         /* No range selection, shuffle all list. */
 611                         break;
 612
 613                 connection = mpdclient_get_connection(c);
 614                 if (connection == NULL)
 615                         return true;
 616
 617                 if (mpd_run_shuffle_range(connection, range.start, range.end))
 618                         screen_status_message(_("Shuffled queue"));
 619                 else
 620                         mpdclient_handle_error(c);
 621                 return true;
 622
 623         case CMD_LIST_MOVE_UP:
 624                 list_window_get_range(lw, &range);
 625                 if (range.start == 0 || range.end <= range.start)
 626                         return false;
 627
 628                 if (!mpdclient_cmd_move(c, range.end - 1, range.start - 1))
 629                         return true;
 630
 631                 lw->selected--;
 632                 lw->range_base--;
 633
 634                 if (lw->range_selection)
 635                         list_window_scroll_to(lw, lw->range_base);
 636                 list_window_scroll_to(lw, lw->selected);
 637
 638                 screen_queue_save_selection();
 639                 return true;
 640
 641         case CMD_LIST_MOVE_DOWN:
 642                 list_window_get_range(lw, &range);
 643                 if (range.end >= playlist_length(&c->playlist))
 644                         return false;
 645
 646                 if (!mpdclient_cmd_move(c, range.start, range.end))
 647                         return true;
 648
 649                 lw->selected++;
 650                 lw->range_base++;
 651
 652                 if (lw->range_selection)
 653                         list_window_scroll_to(lw, lw->range_base);
 654                 list_window_scroll_to(lw, lw->selected);
 655
 656                 screen_queue_save_selection();
 657                 return true;
 658
 659         case CMD_LOCATE:
 660                 if (screen_queue_selected_song() != NULL) {
 661                         screen_file_goto_song(c, screen_queue_selected_song());
 662                         return true;
 663                 }
 664
 665                 break;
 666
 667         default:
 668                 break;
 669         }
 670
 671         return false;
 672 }
 673
 674 const struct screen_functions screen_queue = {
 675         .init = screen_queue_init,
 676         .exit = screen_queue_exit,
 677         .open = screen_queue_open,
 678         .close = screen_queue_close,
 679         .resize = screen_queue_resize,
 680         .paint = screen_queue_paint,
 681         .update = screen_queue_update,
 682         .cmd = screen_queue_cmd,
 683         .get_title = screen_queue_title,
 684 };