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 "strfsong.h"
  30 #include "i18n.h"
  31 #include "player_command.h"
  32
  33 #ifndef NCMPC_MINI
  34 #include "conf.h"
  35 #endif
  36
  37 #ifdef ENABLE_LYRICS_SCREEN
  38 #include "lyrics.h"
  39 #endif
  40
  41 #ifdef ENABLE_LIRC
  42 #include "lirc.h"
  43 #endif
  44
  45 #include <mpd/client.h>
  46
  47 #include <stdlib.h>
  48 #include <unistd.h>
  49 #include <signal.h>
  50 #include <string.h>
  51
  52 #ifdef ENABLE_LOCALE
  53 #include <locale.h>
  54 #endif
  55
  56 /* time between mpd updates [s] */
  57 static const guint update_interval = 500;
  58
  59 #define BUFSIZE 1024
  60
  61 static struct mpdclient *mpd = NULL;
  62 static GMainLoop *main_loop;
  63 static guint reconnect_source_id, update_source_id;
  64
  65 #ifndef NCMPC_MINI
  66 static guint check_key_bindings_source_id;
  67 #endif
  68
  69 static void
  70 error_callback(G_GNUC_UNUSED struct mpdclient *c, G_GNUC_UNUSED gint error,
  71                const gchar *_msg)
  72 {
  73         char *msg = utf8_to_locale(_msg);
  74         screen_status_printf("%s", msg);
  75         g_free(msg);
  76
  77         screen_bell();
  78         doupdate();
  79 }
  80
  81 #ifndef NCMPC_MINI
  82 static void
  83 update_xterm_title(void)
  84 {
  85         static char title[BUFSIZE];
  86         char tmp[BUFSIZE];
  87         struct mpd_status *status = NULL;
  88         const struct mpd_song *song = NULL;
  89
  90         if (mpd) {
  91                 status = mpd->status;
  92                 song = mpd->song;
  93         }
  94
  95         if (options.xterm_title_format && status && song &&
  96             IS_PLAYING(mpd_status_get_state(status)))
  97                 strfsong(tmp, BUFSIZE, options.xterm_title_format, song);
  98         else
  99                 g_strlcpy(tmp, PACKAGE " version " VERSION, BUFSIZE);
 100
 101         if (strncmp(title, tmp, BUFSIZE)) {
 102                 g_strlcpy(title, tmp, BUFSIZE);
 103                 set_xterm_title("%s", title);
 104         }
 105 }
 106 #endif
 107
 108 static void
 109 exit_and_cleanup(void)
 110 {
 111         screen_exit();
 112 #ifndef NCMPC_MINI
 113         set_xterm_title("");
 114 #endif
 115         printf("\n");
 116
 117         if (mpd) {
 118                 mpdclient_disconnect(mpd);
 119                 mpdclient_free(mpd);
 120         }
 121 }
 122
 123 static void
 124 catch_sigint(G_GNUC_UNUSED int sig)
 125 {
 126         g_main_loop_quit(main_loop);
 127 }
 128
 129
 130 static void
 131 catch_sigcont(G_GNUC_UNUSED int sig)
 132 {
 133         screen_resize(mpd);
 134 }
 135
 136 void
 137 sigstop(void)
 138 {
 139   def_prog_mode();  /* save the tty modes */
 140   endwin();         /* end curses mode temporarily */
 141   kill(0, SIGSTOP); /* issue SIGSTOP */
 142 }
 143
 144 static guint timer_sigwinch_id;
 145
 146 static gboolean
 147 timer_sigwinch(G_GNUC_UNUSED gpointer data)
 148 {
 149         /* the following causes the screen to flicker.  There might be
 150            better solutions, but I believe it isn't all that
 151            important. */
 152
 153         endwin();
 154         refresh();
 155         screen_resize(mpd);
 156
 157         return FALSE;
 158 }
 159
 160 static void
 161 catch_sigwinch(G_GNUC_UNUSED int sig)
 162 {
 163         if (timer_sigwinch_id != 0)
 164                 g_source_remove(timer_sigwinch_id);
 165
 166         timer_sigwinch_id = g_timeout_add(100, timer_sigwinch, NULL);
 167 }
 168
 169 static gboolean
 170 timer_mpd_update(gpointer data);
 171
 172 /**
 173  * This timer is installed when the connection to the MPD server is
 174  * broken.  It tries to recover by reconnecting periodically.
 175  */
 176 static gboolean
 177 timer_reconnect(G_GNUC_UNUSED gpointer data)
 178 {
 179         bool success;
 180
 181         assert(!mpdclient_is_connected(mpd));
 182
 183         screen_status_printf(_("Connecting to %s...  [Press %s to abort]"),
 184                              options.host, get_key_names(CMD_QUIT,0) );
 185         doupdate();
 186
 187         mpdclient_disconnect(mpd);
 188         success = mpdclient_connect(mpd,
 189                                     options.host, options.port,
 190                                     1.5,
 191                                     options.password);
 192         if (!success) {
 193                 /* try again in 5 seconds */
 194                 g_timeout_add(5000, timer_reconnect, NULL);
 195                 return FALSE;
 196         }
 197
 198 #ifndef NCMPC_MINI
 199         /* quit if mpd is pre 0.11.0 - song id not supported by mpd */
 200         if (mpd_connection_cmp_server_version(mpd->connection, 0, 12, 0) < 0) {
 201                 const unsigned *version =
 202                         mpd_connection_get_server_version(mpd->connection);
 203                 screen_status_printf(_("Error: MPD version %d.%d.%d is to old (%s needed)"),
 204                                      version[0], version[1], version[2],
 205                                      "0.12.0");
 206                 mpdclient_disconnect(mpd);
 207                 doupdate();
 208
 209                 /* try again after 30 seconds */
 210                 g_timeout_add(30000, timer_reconnect, NULL);
 211                 return FALSE;
 212         }
 213 #endif
 214
 215         screen_status_printf(_("Connected to %s"),
 216                              options.host != NULL
 217                              ? options.host : "localhost");
 218         doupdate();
 219
 220         /* update immediately */
 221         g_timeout_add(1, timer_mpd_update, GINT_TO_POINTER(FALSE));
 222
 223         reconnect_source_id = 0;
 224         return FALSE;
 225
 226 }
 227
 228 static gboolean
 229 timer_mpd_update(gpointer data)
 230 {
 231         if (mpdclient_is_connected(mpd))
 232                 mpdclient_update(mpd);
 233         else if (reconnect_source_id == 0)
 234                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
 235                                                     NULL);
 236
 237 #ifndef NCMPC_MINI
 238         if (options.enable_xterm_title)
 239                 update_xterm_title();
 240 #endif
 241
 242         screen_update(mpd);
 243
 244         return GPOINTER_TO_INT(data);
 245 }
 246
 247 void begin_input_event(void)
 248 {
 249 }
 250
 251 void end_input_event(void)
 252 {
 253         screen_update(mpd);
 254 }
 255
 256 int do_input_event(command_t cmd)
 257 {
 258         if (cmd == CMD_QUIT) {
 259                 g_main_loop_quit(main_loop);
 260                 return -1;
 261         }
 262
 263         screen_cmd(mpd, cmd);
 264
 265         if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN) {
 266                 /* make sure we don't update the volume yet */
 267                 g_source_remove(update_source_id);
 268                 update_source_id = g_timeout_add(update_interval,
 269                                                  timer_mpd_update,
 270                                                  GINT_TO_POINTER(TRUE));
 271         }
 272
 273         return 0;
 274 }
 275
 276 static gboolean
 277 keyboard_event(G_GNUC_UNUSED GIOChannel *source,
 278                G_GNUC_UNUSED GIOCondition condition,
 279                G_GNUC_UNUSED gpointer data)
 280 {
 281         command_t cmd;
 282
 283         begin_input_event();
 284
 285         if ((cmd=get_keyboard_command()) != CMD_NONE)
 286                 if (do_input_event(cmd) != 0)
 287                         return FALSE;
 288
 289         end_input_event();
 290         return TRUE;
 291 }
 292
 293 #ifndef NCMPC_MINI
 294 /**
 295  * Check the configured key bindings for errors, and display a status
 296  * message every 10 seconds.
 297  */
 298 static gboolean
 299 timer_check_key_bindings(G_GNUC_UNUSED gpointer data)
 300 {
 301         char buf[256];
 302 #ifdef ENABLE_KEYDEF_SCREEN
 303         char comment[64];
 304 #endif
 305         gboolean key_error;
 306
 307         key_error = check_key_bindings(NULL, buf, sizeof(buf));
 308         if (!key_error) {
 309                 /* no error: disable this timer for the rest of this
 310                    process */
 311                 check_key_bindings_source_id = 0;
 312                 return FALSE;
 313         }
 314
 315 #ifdef ENABLE_KEYDEF_SCREEN
 316         g_strchomp(buf);
 317         g_strlcat(buf, " (", sizeof(buf));
 318         /* to translators: a key was bound twice in the key editor,
 319            and this is a hint for the user what to press to correct
 320            that */
 321         g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
 322                    get_key_names(CMD_SCREEN_KEYDEF, 0));
 323         g_strlcat(buf, comment, sizeof(buf));
 324         g_strlcat(buf, ")", sizeof(buf));
 325 #endif
 326
 327         screen_status_printf("%s", buf);
 328
 329         doupdate();
 330         return TRUE;
 331 }
 332 #endif
 333
 334 int
 335 main(int argc, const char *argv[])
 336 {
 337         struct sigaction act;
 338 #ifdef ENABLE_LOCALE
 339         const char *charset = NULL;
 340 #endif
 341         GIOChannel *keyboard_channel;
 342 #ifdef ENABLE_LIRC
 343         int lirc_socket;
 344         GIOChannel *lirc_channel = NULL;
 345 #endif
 346
 347 #ifdef ENABLE_LOCALE
 348         /* time and date formatting */
 349         setlocale(LC_TIME,"");
 350         /* care about sorting order etc */
 351         setlocale(LC_COLLATE,"");
 352         /* charset */
 353         setlocale(LC_CTYPE,"");
 354         /* initialize charset conversions */
 355         charset = charset_init();
 356
 357         /* initialize i18n support */
 358 #endif
 359
 360 #ifdef ENABLE_NLS
 361         setlocale(LC_MESSAGES, "");
 362         bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
 363 #ifdef ENABLE_LOCALE
 364         bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
 365 #endif
 366         textdomain(GETTEXT_PACKAGE);
 367 #endif
 368
 369         /* initialize options */
 370         options_init();
 371
 372         /* parse command line options - 1 pass get configuration files */
 373         options_parse(argc, argv);
 374
 375 #ifndef NCMPC_MINI
 376         /* read configuration */
 377         read_configuration();
 378
 379         /* check key bindings */
 380         check_key_bindings(NULL, NULL, 0);
 381 #endif
 382
 383         /* parse command line options - 2 pass */
 384         options_parse(argc, argv);
 385
 386         /* setup signal behavior - SIGINT */
 387         sigemptyset(&act.sa_mask);
 388         act.sa_flags = 0;
 389         act.sa_handler = catch_sigint;
 390         if (sigaction(SIGINT, &act, NULL) < 0) {
 391                 perror("signal");
 392                 exit(EXIT_FAILURE);
 393         }
 394
 395         /* setup signal behavior - SIGTERM */
 396
 397         act.sa_handler = catch_sigint;
 398         if (sigaction(SIGTERM, &act, NULL) < 0) {
 399                 perror("sigaction()");
 400                 exit(EXIT_FAILURE);
 401         }
 402
 403         /* setup signal behavior - SIGCONT */
 404
 405         act.sa_handler = catch_sigcont;
 406         if (sigaction(SIGCONT, &act, NULL) < 0) {
 407                 perror("sigaction(SIGCONT)");
 408                 exit(EXIT_FAILURE);
 409         }
 410
 411         /* setup signal behaviour - SIGHUP*/
 412
 413         act.sa_handler = catch_sigint;
 414         if (sigaction(SIGHUP, &act, NULL) < 0) {
 415                 perror("sigaction(SIGHUP)");
 416                 exit(EXIT_FAILURE);
 417         }
 418
 419         /* setup SIGWINCH */
 420
 421         act.sa_flags = SA_RESTART;
 422         act.sa_handler = catch_sigwinch;
 423         if (sigaction(SIGWINCH, &act, NULL) < 0) {
 424                 perror("sigaction(SIGWINCH)");
 425                 exit(EXIT_FAILURE);
 426         }
 427
 428         /* ignore SIGPIPE */
 429
 430         act.sa_handler = SIG_IGN;
 431         if (sigaction(SIGPIPE, &act, NULL) < 0) {
 432                 perror("sigaction(SIGPIPE)");
 433                 exit(EXIT_FAILURE);
 434         }
 435
 436         ncu_init();
 437
 438 #ifdef ENABLE_LYRICS_SCREEN
 439         lyrics_init();
 440 #endif
 441
 442         /* create mpdclient instance */
 443         mpd = mpdclient_new();
 444         mpdclient_install_error_callback(mpd, error_callback);
 445
 446         /* initialize curses */
 447         screen_init(mpd);
 448
 449         /* the main loop */
 450         main_loop = g_main_loop_new(NULL, FALSE);
 451
 452         /* watch out for keyboard input */
 453         keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
 454         g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);
 455
 456 #ifdef ENABLE_LIRC
 457         /* watch out for lirc input */
 458         lirc_socket = ncmpc_lirc_open();
 459         if (lirc_socket >= 0) {
 460                 lirc_channel = g_io_channel_unix_new(lirc_socket);
 461                 g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
 462         }
 463 #endif
 464
 465         /* attempt to connect */
 466         reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
 467
 468         update_source_id = g_timeout_add(update_interval,
 469                                          timer_mpd_update,
 470                                          GINT_TO_POINTER(TRUE));
 471 #ifndef NCMPC_MINI
 472         check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
 473 #endif
 474
 475         screen_paint(mpd);
 476
 477         g_main_loop_run(main_loop);
 478
 479         /* cleanup */
 480
 481         cancel_seek_timer();
 482
 483         g_source_remove(update_source_id);
 484
 485 #ifndef NCMPC_MINI
 486         if (check_key_bindings_source_id != 0)
 487                 g_source_remove(check_key_bindings_source_id);
 488 #endif
 489
 490         g_main_loop_unref(main_loop);
 491         g_io_channel_unref(keyboard_channel);
 492
 493 #ifdef ENABLE_LIRC
 494         if (lirc_socket >= 0)
 495                 g_io_channel_unref(lirc_channel);
 496         ncmpc_lirc_close();
 497 #endif
 498
 499         exit_and_cleanup();
 500
 501 #ifdef ENABLE_LYRICS_SCREEN
 502         lyrics_deinit();
 503 #endif
 504
 505         ncu_deinit();
 506         options_deinit();
 507
 508         return 0;
 509 }