src/main.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2009 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 "config.h"
  21 #include "ncmpc.h"
  22 #include "mpdclient.h"
  23 #include "charset.h"
  24 #include "options.h"
  25 #include "command.h"
  26 #include "ncu.h"
  27 #include "screen.h"
  28 #include "screen_utils.h"
  29 #include "screen_message.h"
  30 #include "strfsong.h"
  31 #include "i18n.h"
  32 #include "player_command.h"
  33
  34 #ifndef NCMPC_MINI
  35 #include "conf.h"
  36 #endif
  37
  38 #ifdef ENABLE_LYRICS_SCREEN
  39 #include "lyrics.h"
  40 #endif
  41
  42 #ifdef ENABLE_LIRC
  43 #include "lirc.h"
  44 #endif
  45
  46 #include <mpd/client.h>
  47
  48 #include <stdlib.h>
  49 #include <unistd.h>
  50 #include <signal.h>
  51 #include <string.h>
  52
  53 #ifdef ENABLE_LOCALE
  54 #include <locale.h>
  55 #endif
  56
  57 /* time between mpd updates [s] */
  58 static const guint update_interval = 500;
  59
  60 #define BUFSIZE 1024
  61
  62 static struct mpdclient *mpd = NULL;
  63 static GMainLoop *main_loop;
  64 static guint reconnect_source_id, update_source_id;
  65
  66 #ifndef NCMPC_MINI
  67 static guint check_key_bindings_source_id;
  68 #endif
  69
  70 #ifndef NCMPC_MINI
  71 static void
  72 update_xterm_title(void)
  73 {
  74         static char title[BUFSIZE];
  75         char tmp[BUFSIZE];
  76         struct mpd_status *status = NULL;
  77         const struct mpd_song *song = NULL;
  78
  79         if (mpd) {
  80                 status = mpd->status;
  81                 song = mpd->song;
  82         }
  83
  84         if (options.xterm_title_format && status && song &&
  85             mpd_status_get_state(status) == MPD_STATE_PLAY)
  86                 strfsong(tmp, BUFSIZE, options.xterm_title_format, song);
  87         else
  88                 g_strlcpy(tmp, PACKAGE " version " VERSION, BUFSIZE);
  89
  90         if (strncmp(title, tmp, BUFSIZE)) {
  91                 g_strlcpy(title, tmp, BUFSIZE);
  92                 set_xterm_title("%s", title);
  93         }
  94 }
  95 #endif
  96
  97 static void
  98 exit_and_cleanup(void)
  99 {
 100         screen_exit();
 101 #ifndef NCMPC_MINI
 102         set_xterm_title("");
 103 #endif
 104         printf("\n");
 105
 106         if (mpd) {
 107                 mpdclient_disconnect(mpd);
 108                 mpdclient_free(mpd);
 109         }
 110 }
 111
 112 static void
 113 catch_sigint(G_GNUC_UNUSED int sig)
 114 {
 115         g_main_loop_quit(main_loop);
 116 }
 117
 118
 119 static void
 120 catch_sigcont(G_GNUC_UNUSED int sig)
 121 {
 122         screen_resize(mpd);
 123 }
 124
 125 void
 126 sigstop(void)
 127 {
 128   def_prog_mode();  /* save the tty modes */
 129   endwin();         /* end curses mode temporarily */
 130   kill(0, SIGSTOP); /* issue SIGSTOP */
 131 }
 132
 133 static guint timer_sigwinch_id;
 134
 135 static gboolean
 136 timer_sigwinch(G_GNUC_UNUSED gpointer data)
 137 {
 138         /* the following causes the screen to flicker.  There might be
 139            better solutions, but I believe it isn't all that
 140            important. */
 141
 142         endwin();
 143         refresh();
 144         screen_resize(mpd);
 145
 146         return FALSE;
 147 }
 148
 149 static void
 150 catch_sigwinch(G_GNUC_UNUSED int sig)
 151 {
 152         if (timer_sigwinch_id != 0)
 153                 g_source_remove(timer_sigwinch_id);
 154
 155         timer_sigwinch_id = g_timeout_add(100, timer_sigwinch, NULL);
 156 }
 157
 158 static gboolean
 159 timer_mpd_update(gpointer data);
 160
 161 static void
 162 enable_update_timer(void)
 163 {
 164         if (update_source_id != 0)
 165                 return;
 166
 167         update_source_id = g_timeout_add(update_interval,
 168                                          timer_mpd_update, NULL);
 169 }
 170
 171 static void
 172 disable_update_timer(void)
 173 {
 174         if (update_source_id == 0)
 175                 return;
 176
 177         g_source_remove(update_source_id);
 178         update_source_id = 0;
 179 }
 180
 181 static void
 182 check_reconnect(void);
 183
 184 static void
 185 do_mpd_update(void)
 186 {
 187         if (mpdclient_is_connected(mpd))
 188                 mpdclient_update(mpd);
 189
 190 #ifndef NCMPC_MINI
 191         if (options.enable_xterm_title)
 192                 update_xterm_title();
 193 #endif
 194
 195         screen_update(mpd);
 196         mpd->events = 0;
 197
 198         check_reconnect();
 199 }
 200
 201 /**
 202  * This timer is installed when the connection to the MPD server is
 203  * broken.  It tries to recover by reconnecting periodically.
 204  */
 205 static gboolean
 206 timer_reconnect(G_GNUC_UNUSED gpointer data)
 207 {
 208         bool success;
 209
 210         assert(!mpdclient_is_connected(mpd));
 211
 212         reconnect_source_id = 0;
 213
 214         screen_status_printf(_("Connecting to %s...  [Press %s to abort]"),
 215                              options.host, get_key_names(CMD_QUIT,0) );
 216         doupdate();
 217
 218         mpdclient_disconnect(mpd);
 219         success = mpdclient_connect(mpd,
 220                                     options.host, options.port,
 221                                     1.5,
 222                                     options.password);
 223         if (!success) {
 224                 /* try again in 5 seconds */
 225                 reconnect_source_id = g_timeout_add(5000,
 226                                                     timer_reconnect, NULL);
 227                 return FALSE;
 228         }
 229
 230 #ifndef NCMPC_MINI
 231         /* quit if mpd is pre 0.11.0 - song id not supported by mpd */
 232         if (mpd_connection_cmp_server_version(mpd->connection, 0, 12, 0) < 0) {
 233                 const unsigned *version =
 234                         mpd_connection_get_server_version(mpd->connection);
 235                 screen_status_printf(_("Error: MPD version %d.%d.%d is to old (%s needed)"),
 236                                      version[0], version[1], version[2],
 237                                      "0.12.0");
 238                 mpdclient_disconnect(mpd);
 239                 doupdate();
 240
 241                 /* try again after 30 seconds */
 242                 reconnect_source_id = g_timeout_add(30000,
 243                                                     timer_reconnect, NULL);
 244                 return FALSE;
 245         }
 246 #endif
 247
 248         screen_status_printf(_("Connected to %s"),
 249                              options.host != NULL
 250                              ? options.host : "localhost");
 251         doupdate();
 252
 253         /* update immediately */
 254         mpd->events = MPD_IDLE_DATABASE|MPD_IDLE_STORED_PLAYLIST|
 255                 MPD_IDLE_QUEUE|MPD_IDLE_PLAYER|MPD_IDLE_MIXER|MPD_IDLE_OUTPUT|
 256                 MPD_IDLE_OPTIONS|MPD_IDLE_UPDATE;
 257
 258         do_mpd_update();
 259
 260         return FALSE;
 261 }
 262
 263 static void
 264 check_reconnect(void)
 265 {
 266         if (!mpdclient_is_connected(mpd) && reconnect_source_id == 0)
 267                 /* reconnect when the connection is lost */
 268                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
 269                                                     NULL);
 270 }
 271
 272 static gboolean
 273 timer_mpd_update(G_GNUC_UNUSED gpointer data)
 274 {
 275         do_mpd_update();
 276
 277         return true;
 278 }
 279
 280 void begin_input_event(void)
 281 {
 282 }
 283
 284 void end_input_event(void)
 285 {
 286         screen_update(mpd);
 287         mpd->events = 0;
 288
 289         check_reconnect();
 290 }
 291
 292 int do_input_event(command_t cmd)
 293 {
 294         if (cmd == CMD_QUIT) {
 295                 g_main_loop_quit(main_loop);
 296                 return -1;
 297         }
 298
 299         screen_cmd(mpd, cmd);
 300
 301         if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN) {
 302                 /* make sure we don't update the volume yet */
 303                 disable_update_timer();
 304                 enable_update_timer();
 305         }
 306
 307         return 0;
 308 }
 309
 310 static gboolean
 311 keyboard_event(G_GNUC_UNUSED GIOChannel *source,
 312                G_GNUC_UNUSED GIOCondition condition,
 313                G_GNUC_UNUSED gpointer data)
 314 {
 315         command_t cmd;
 316
 317         begin_input_event();
 318
 319         if ((cmd=get_keyboard_command()) != CMD_NONE)
 320                 if (do_input_event(cmd) != 0)
 321                         return FALSE;
 322
 323         end_input_event();
 324         return TRUE;
 325 }
 326
 327 #ifndef NCMPC_MINI
 328 /**
 329  * Check the configured key bindings for errors, and display a status
 330  * message every 10 seconds.
 331  */
 332 static gboolean
 333 timer_check_key_bindings(G_GNUC_UNUSED gpointer data)
 334 {
 335         char buf[256];
 336 #ifdef ENABLE_KEYDEF_SCREEN
 337         char comment[64];
 338 #endif
 339         gboolean key_error;
 340
 341         key_error = check_key_bindings(NULL, buf, sizeof(buf));
 342         if (!key_error) {
 343                 /* no error: disable this timer for the rest of this
 344                    process */
 345                 check_key_bindings_source_id = 0;
 346                 return FALSE;
 347         }
 348
 349 #ifdef ENABLE_KEYDEF_SCREEN
 350         g_strchomp(buf);
 351         g_strlcat(buf, " (", sizeof(buf));
 352         /* to translators: a key was bound twice in the key editor,
 353            and this is a hint for the user what to press to correct
 354            that */
 355         g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
 356                    get_key_names(CMD_SCREEN_KEYDEF, 0));
 357         g_strlcat(buf, comment, sizeof(buf));
 358         g_strlcat(buf, ")", sizeof(buf));
 359 #endif
 360
 361         screen_status_printf("%s", buf);
 362
 363         doupdate();
 364         return TRUE;
 365 }
 366 #endif
 367
 368 int
 369 main(int argc, const char *argv[])
 370 {
 371         struct sigaction act;
 372 #ifdef ENABLE_LOCALE
 373         const char *charset = NULL;
 374 #endif
 375         GIOChannel *keyboard_channel;
 376 #ifdef ENABLE_LIRC
 377         int lirc_socket;
 378         GIOChannel *lirc_channel = NULL;
 379 #endif
 380
 381 #ifdef ENABLE_LOCALE
 382         /* time and date formatting */
 383         setlocale(LC_TIME,"");
 384         /* care about sorting order etc */
 385         setlocale(LC_COLLATE,"");
 386         /* charset */
 387         setlocale(LC_CTYPE,"");
 388         /* initialize charset conversions */
 389         charset = charset_init();
 390
 391         /* initialize i18n support */
 392 #endif
 393
 394 #ifdef ENABLE_NLS
 395         setlocale(LC_MESSAGES, "");
 396         bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
 397 #ifdef ENABLE_LOCALE
 398         bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
 399 #endif
 400         textdomain(GETTEXT_PACKAGE);
 401 #endif
 402
 403         /* initialize options */
 404         options_init();
 405
 406         /* parse command line options - 1 pass get configuration files */
 407         options_parse(argc, argv);
 408
 409 #ifndef NCMPC_MINI
 410         /* read configuration */
 411         read_configuration();
 412
 413         /* check key bindings */
 414         check_key_bindings(NULL, NULL, 0);
 415 #endif
 416
 417         /* parse command line options - 2 pass */
 418         options_parse(argc, argv);
 419
 420         /* setup signal behavior - SIGINT */
 421         sigemptyset(&act.sa_mask);
 422         act.sa_flags = 0;
 423         act.sa_handler = catch_sigint;
 424         if (sigaction(SIGINT, &act, NULL) < 0) {
 425                 perror("signal");
 426                 exit(EXIT_FAILURE);
 427         }
 428
 429         /* setup signal behavior - SIGTERM */
 430
 431         act.sa_handler = catch_sigint;
 432         if (sigaction(SIGTERM, &act, NULL) < 0) {
 433                 perror("sigaction()");
 434                 exit(EXIT_FAILURE);
 435         }
 436
 437         /* setup signal behavior - SIGCONT */
 438
 439         act.sa_handler = catch_sigcont;
 440         if (sigaction(SIGCONT, &act, NULL) < 0) {
 441                 perror("sigaction(SIGCONT)");
 442                 exit(EXIT_FAILURE);
 443         }
 444
 445         /* setup signal behaviour - SIGHUP*/
 446
 447         act.sa_handler = catch_sigint;
 448         if (sigaction(SIGHUP, &act, NULL) < 0) {
 449                 perror("sigaction(SIGHUP)");
 450                 exit(EXIT_FAILURE);
 451         }
 452
 453         /* setup SIGWINCH */
 454
 455         act.sa_flags = SA_RESTART;
 456         act.sa_handler = catch_sigwinch;
 457         if (sigaction(SIGWINCH, &act, NULL) < 0) {
 458                 perror("sigaction(SIGWINCH)");
 459                 exit(EXIT_FAILURE);
 460         }
 461
 462         /* ignore SIGPIPE */
 463
 464         act.sa_handler = SIG_IGN;
 465         if (sigaction(SIGPIPE, &act, NULL) < 0) {
 466                 perror("sigaction(SIGPIPE)");
 467                 exit(EXIT_FAILURE);
 468         }
 469
 470         ncu_init();
 471
 472 #ifdef ENABLE_LYRICS_SCREEN
 473         lyrics_init();
 474 #endif
 475
 476         /* create mpdclient instance */
 477         mpd = mpdclient_new();
 478
 479         /* initialize curses */
 480         screen_init(mpd);
 481
 482         /* the main loop */
 483         main_loop = g_main_loop_new(NULL, FALSE);
 484
 485         /* watch out for keyboard input */
 486         keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
 487         g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);
 488
 489 #ifdef ENABLE_LIRC
 490         /* watch out for lirc input */
 491         lirc_socket = ncmpc_lirc_open();
 492         if (lirc_socket >= 0) {
 493                 lirc_channel = g_io_channel_unix_new(lirc_socket);
 494                 g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
 495         }
 496 #endif
 497
 498         /* attempt to connect */
 499         reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
 500
 501         enable_update_timer();
 502
 503 #ifndef NCMPC_MINI
 504         check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
 505 #endif
 506
 507         screen_paint(mpd);
 508
 509         g_main_loop_run(main_loop);
 510
 511         /* cleanup */
 512
 513         cancel_seek_timer();
 514
 515         disable_update_timer();
 516
 517         if (reconnect_source_id != 0)
 518                 g_source_remove(reconnect_source_id);
 519
 520 #ifndef NCMPC_MINI
 521         if (check_key_bindings_source_id != 0)
 522                 g_source_remove(check_key_bindings_source_id);
 523 #endif
 524
 525         g_main_loop_unref(main_loop);
 526         g_io_channel_unref(keyboard_channel);
 527
 528 #ifdef ENABLE_LIRC
 529         if (lirc_socket >= 0)
 530                 g_io_channel_unref(lirc_channel);
 531         ncmpc_lirc_close();
 532 #endif
 533
 534         exit_and_cleanup();
 535
 536 #ifdef ENABLE_LYRICS_SCREEN
 537         lyrics_deinit();
 538 #endif
 539
 540         ncu_deinit();
 541         options_deinit();
 542
 543         return 0;
 544 }