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,
 169                                          GINT_TO_POINTER(TRUE));
 170 }
 171
 172 static void
 173 disable_update_timer(void)
 174 {
 175         if (update_source_id == 0)
 176                 return;
 177
 178         g_source_remove(update_source_id);
 179         update_source_id = 0;
 180 }
 181
 182 /**
 183  * This timer is installed when the connection to the MPD server is
 184  * broken.  It tries to recover by reconnecting periodically.
 185  */
 186 static gboolean
 187 timer_reconnect(G_GNUC_UNUSED gpointer data)
 188 {
 189         bool success;
 190
 191         assert(!mpdclient_is_connected(mpd));
 192
 193         reconnect_source_id = 0;
 194
 195         screen_status_printf(_("Connecting to %s...  [Press %s to abort]"),
 196                              options.host, get_key_names(CMD_QUIT,0) );
 197         doupdate();
 198
 199         mpdclient_disconnect(mpd);
 200         success = mpdclient_connect(mpd,
 201                                     options.host, options.port,
 202                                     1.5,
 203                                     options.password);
 204         if (!success) {
 205                 /* try again in 5 seconds */
 206                 reconnect_source_id = g_timeout_add(5000,
 207                                                     timer_reconnect, NULL);
 208                 return FALSE;
 209         }
 210
 211 #ifndef NCMPC_MINI
 212         /* quit if mpd is pre 0.11.0 - song id not supported by mpd */
 213         if (mpd_connection_cmp_server_version(mpd->connection, 0, 12, 0) < 0) {
 214                 const unsigned *version =
 215                         mpd_connection_get_server_version(mpd->connection);
 216                 screen_status_printf(_("Error: MPD version %d.%d.%d is to old (%s needed)"),
 217                                      version[0], version[1], version[2],
 218                                      "0.12.0");
 219                 mpdclient_disconnect(mpd);
 220                 doupdate();
 221
 222                 /* try again after 30 seconds */
 223                 reconnect_source_id = g_timeout_add(30000,
 224                                                     timer_reconnect, NULL);
 225                 return FALSE;
 226         }
 227 #endif
 228
 229         screen_status_printf(_("Connected to %s"),
 230                              options.host != NULL
 231                              ? options.host : "localhost");
 232         doupdate();
 233
 234         /* update immediately */
 235         g_timeout_add(1, timer_mpd_update, GINT_TO_POINTER(FALSE));
 236
 237         return FALSE;
 238 }
 239
 240 static gboolean
 241 timer_mpd_update(gpointer data)
 242 {
 243         if (mpdclient_is_connected(mpd))
 244                 mpdclient_update(mpd);
 245
 246 #ifndef NCMPC_MINI
 247         if (options.enable_xterm_title)
 248                 update_xterm_title();
 249 #endif
 250
 251         screen_update(mpd);
 252         mpd->events = 0;
 253
 254         if (!mpdclient_is_connected(mpd) && reconnect_source_id == 0)
 255                 /* reconnect when the connection is lost */
 256                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
 257                                                     NULL);
 258
 259         return GPOINTER_TO_INT(data);
 260 }
 261
 262 void begin_input_event(void)
 263 {
 264 }
 265
 266 void end_input_event(void)
 267 {
 268         screen_update(mpd);
 269         mpd->events = 0;
 270 }
 271
 272 int do_input_event(command_t cmd)
 273 {
 274         if (cmd == CMD_QUIT) {
 275                 g_main_loop_quit(main_loop);
 276                 return -1;
 277         }
 278
 279         screen_cmd(mpd, cmd);
 280
 281         if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN) {
 282                 /* make sure we don't update the volume yet */
 283                 disable_update_timer();
 284                 enable_update_timer();
 285         }
 286
 287         return 0;
 288 }
 289
 290 static gboolean
 291 keyboard_event(G_GNUC_UNUSED GIOChannel *source,
 292                G_GNUC_UNUSED GIOCondition condition,
 293                G_GNUC_UNUSED gpointer data)
 294 {
 295         command_t cmd;
 296
 297         begin_input_event();
 298
 299         if ((cmd=get_keyboard_command()) != CMD_NONE)
 300                 if (do_input_event(cmd) != 0)
 301                         return FALSE;
 302
 303         end_input_event();
 304         return TRUE;
 305 }
 306
 307 #ifndef NCMPC_MINI
 308 /**
 309  * Check the configured key bindings for errors, and display a status
 310  * message every 10 seconds.
 311  */
 312 static gboolean
 313 timer_check_key_bindings(G_GNUC_UNUSED gpointer data)
 314 {
 315         char buf[256];
 316 #ifdef ENABLE_KEYDEF_SCREEN
 317         char comment[64];
 318 #endif
 319         gboolean key_error;
 320
 321         key_error = check_key_bindings(NULL, buf, sizeof(buf));
 322         if (!key_error) {
 323                 /* no error: disable this timer for the rest of this
 324                    process */
 325                 check_key_bindings_source_id = 0;
 326                 return FALSE;
 327         }
 328
 329 #ifdef ENABLE_KEYDEF_SCREEN
 330         g_strchomp(buf);
 331         g_strlcat(buf, " (", sizeof(buf));
 332         /* to translators: a key was bound twice in the key editor,
 333            and this is a hint for the user what to press to correct
 334            that */
 335         g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
 336                    get_key_names(CMD_SCREEN_KEYDEF, 0));
 337         g_strlcat(buf, comment, sizeof(buf));
 338         g_strlcat(buf, ")", sizeof(buf));
 339 #endif
 340
 341         screen_status_printf("%s", buf);
 342
 343         doupdate();
 344         return TRUE;
 345 }
 346 #endif
 347
 348 int
 349 main(int argc, const char *argv[])
 350 {
 351         struct sigaction act;
 352 #ifdef ENABLE_LOCALE
 353         const char *charset = NULL;
 354 #endif
 355         GIOChannel *keyboard_channel;
 356 #ifdef ENABLE_LIRC
 357         int lirc_socket;
 358         GIOChannel *lirc_channel = NULL;
 359 #endif
 360
 361 #ifdef ENABLE_LOCALE
 362         /* time and date formatting */
 363         setlocale(LC_TIME,"");
 364         /* care about sorting order etc */
 365         setlocale(LC_COLLATE,"");
 366         /* charset */
 367         setlocale(LC_CTYPE,"");
 368         /* initialize charset conversions */
 369         charset = charset_init();
 370
 371         /* initialize i18n support */
 372 #endif
 373
 374 #ifdef ENABLE_NLS
 375         setlocale(LC_MESSAGES, "");
 376         bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
 377 #ifdef ENABLE_LOCALE
 378         bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
 379 #endif
 380         textdomain(GETTEXT_PACKAGE);
 381 #endif
 382
 383         /* initialize options */
 384         options_init();
 385
 386         /* parse command line options - 1 pass get configuration files */
 387         options_parse(argc, argv);
 388
 389 #ifndef NCMPC_MINI
 390         /* read configuration */
 391         read_configuration();
 392
 393         /* check key bindings */
 394         check_key_bindings(NULL, NULL, 0);
 395 #endif
 396
 397         /* parse command line options - 2 pass */
 398         options_parse(argc, argv);
 399
 400         /* setup signal behavior - SIGINT */
 401         sigemptyset(&act.sa_mask);
 402         act.sa_flags = 0;
 403         act.sa_handler = catch_sigint;
 404         if (sigaction(SIGINT, &act, NULL) < 0) {
 405                 perror("signal");
 406                 exit(EXIT_FAILURE);
 407         }
 408
 409         /* setup signal behavior - SIGTERM */
 410
 411         act.sa_handler = catch_sigint;
 412         if (sigaction(SIGTERM, &act, NULL) < 0) {
 413                 perror("sigaction()");
 414                 exit(EXIT_FAILURE);
 415         }
 416
 417         /* setup signal behavior - SIGCONT */
 418
 419         act.sa_handler = catch_sigcont;
 420         if (sigaction(SIGCONT, &act, NULL) < 0) {
 421                 perror("sigaction(SIGCONT)");
 422                 exit(EXIT_FAILURE);
 423         }
 424
 425         /* setup signal behaviour - SIGHUP*/
 426
 427         act.sa_handler = catch_sigint;
 428         if (sigaction(SIGHUP, &act, NULL) < 0) {
 429                 perror("sigaction(SIGHUP)");
 430                 exit(EXIT_FAILURE);
 431         }
 432
 433         /* setup SIGWINCH */
 434
 435         act.sa_flags = SA_RESTART;
 436         act.sa_handler = catch_sigwinch;
 437         if (sigaction(SIGWINCH, &act, NULL) < 0) {
 438                 perror("sigaction(SIGWINCH)");
 439                 exit(EXIT_FAILURE);
 440         }
 441
 442         /* ignore SIGPIPE */
 443
 444         act.sa_handler = SIG_IGN;
 445         if (sigaction(SIGPIPE, &act, NULL) < 0) {
 446                 perror("sigaction(SIGPIPE)");
 447                 exit(EXIT_FAILURE);
 448         }
 449
 450         ncu_init();
 451
 452 #ifdef ENABLE_LYRICS_SCREEN
 453         lyrics_init();
 454 #endif
 455
 456         /* create mpdclient instance */
 457         mpd = mpdclient_new();
 458
 459         /* initialize curses */
 460         screen_init(mpd);
 461
 462         /* the main loop */
 463         main_loop = g_main_loop_new(NULL, FALSE);
 464
 465         /* watch out for keyboard input */
 466         keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
 467         g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);
 468
 469 #ifdef ENABLE_LIRC
 470         /* watch out for lirc input */
 471         lirc_socket = ncmpc_lirc_open();
 472         if (lirc_socket >= 0) {
 473                 lirc_channel = g_io_channel_unix_new(lirc_socket);
 474                 g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
 475         }
 476 #endif
 477
 478         /* attempt to connect */
 479         reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
 480
 481         enable_update_timer();
 482
 483 #ifndef NCMPC_MINI
 484         check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
 485 #endif
 486
 487         screen_paint(mpd);
 488
 489         g_main_loop_run(main_loop);
 490
 491         /* cleanup */
 492
 493         cancel_seek_timer();
 494
 495         disable_update_timer();
 496
 497         if (reconnect_source_id != 0)
 498                 g_source_remove(reconnect_source_id);
 499
 500 #ifndef NCMPC_MINI
 501         if (check_key_bindings_source_id != 0)
 502                 g_source_remove(check_key_bindings_source_id);
 503 #endif
 504
 505         g_main_loop_unref(main_loop);
 506         g_io_channel_unref(keyboard_channel);
 507
 508 #ifdef ENABLE_LIRC
 509         if (lirc_socket >= 0)
 510                 g_io_channel_unref(lirc_channel);
 511         ncmpc_lirc_close();
 512 #endif
 513
 514         exit_and_cleanup();
 515
 516 #ifdef ENABLE_LYRICS_SCREEN
 517         lyrics_deinit();
 518 #endif
 519
 520         ncu_deinit();
 521         options_deinit();
 522
 523         return 0;
 524 }