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 /**
 162  * This timer is installed when the connection to the MPD server is
 163  * broken.  It tries to recover by reconnecting periodically.
 164  */
 165 static gboolean
 166 timer_reconnect(G_GNUC_UNUSED gpointer data)
 167 {
 168         bool success;
 169
 170         assert(!mpdclient_is_connected(mpd));
 171
 172         screen_status_printf(_("Connecting to %s...  [Press %s to abort]"),
 173                              options.host, get_key_names(CMD_QUIT,0) );
 174         doupdate();
 175
 176         mpdclient_disconnect(mpd);
 177         success = mpdclient_connect(mpd,
 178                                     options.host, options.port,
 179                                     1.5,
 180                                     options.password);
 181         if (!success) {
 182                 /* try again in 5 seconds */
 183                 g_timeout_add(5000, timer_reconnect, NULL);
 184                 return FALSE;
 185         }
 186
 187 #ifndef NCMPC_MINI
 188         /* quit if mpd is pre 0.11.0 - song id not supported by mpd */
 189         if (mpd_connection_cmp_server_version(mpd->connection, 0, 12, 0) < 0) {
 190                 const unsigned *version =
 191                         mpd_connection_get_server_version(mpd->connection);
 192                 screen_status_printf(_("Error: MPD version %d.%d.%d is to old (%s needed)"),
 193                                      version[0], version[1], version[2],
 194                                      "0.12.0");
 195                 mpdclient_disconnect(mpd);
 196                 doupdate();
 197
 198                 /* try again after 30 seconds */
 199                 g_timeout_add(30000, timer_reconnect, NULL);
 200                 return FALSE;
 201         }
 202 #endif
 203
 204         screen_status_printf(_("Connected to %s"),
 205                              options.host != NULL
 206                              ? options.host : "localhost");
 207         doupdate();
 208
 209         /* update immediately */
 210         g_timeout_add(1, timer_mpd_update, GINT_TO_POINTER(FALSE));
 211
 212         reconnect_source_id = 0;
 213         return FALSE;
 214
 215 }
 216
 217 static gboolean
 218 timer_mpd_update(gpointer data)
 219 {
 220         if (mpdclient_is_connected(mpd))
 221                 mpdclient_update(mpd);
 222         else if (reconnect_source_id == 0)
 223                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
 224                                                     NULL);
 225
 226 #ifndef NCMPC_MINI
 227         if (options.enable_xterm_title)
 228                 update_xterm_title();
 229 #endif
 230
 231         screen_update(mpd);
 232
 233         mpd->events = 0;
 234
 235         return GPOINTER_TO_INT(data);
 236 }
 237
 238 void begin_input_event(void)
 239 {
 240 }
 241
 242 void end_input_event(void)
 243 {
 244         screen_update(mpd);
 245 }
 246
 247 int do_input_event(command_t cmd)
 248 {
 249         if (cmd == CMD_QUIT) {
 250                 g_main_loop_quit(main_loop);
 251                 return -1;
 252         }
 253
 254         screen_cmd(mpd, cmd);
 255
 256         if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN) {
 257                 /* make sure we don't update the volume yet */
 258                 g_source_remove(update_source_id);
 259                 update_source_id = g_timeout_add(update_interval,
 260                                                  timer_mpd_update,
 261                                                  GINT_TO_POINTER(TRUE));
 262         }
 263
 264         return 0;
 265 }
 266
 267 static gboolean
 268 keyboard_event(G_GNUC_UNUSED GIOChannel *source,
 269                G_GNUC_UNUSED GIOCondition condition,
 270                G_GNUC_UNUSED gpointer data)
 271 {
 272         command_t cmd;
 273
 274         begin_input_event();
 275
 276         if ((cmd=get_keyboard_command()) != CMD_NONE)
 277                 if (do_input_event(cmd) != 0)
 278                         return FALSE;
 279
 280         end_input_event();
 281         return TRUE;
 282 }
 283
 284 #ifndef NCMPC_MINI
 285 /**
 286  * Check the configured key bindings for errors, and display a status
 287  * message every 10 seconds.
 288  */
 289 static gboolean
 290 timer_check_key_bindings(G_GNUC_UNUSED gpointer data)
 291 {
 292         char buf[256];
 293 #ifdef ENABLE_KEYDEF_SCREEN
 294         char comment[64];
 295 #endif
 296         gboolean key_error;
 297
 298         key_error = check_key_bindings(NULL, buf, sizeof(buf));
 299         if (!key_error) {
 300                 /* no error: disable this timer for the rest of this
 301                    process */
 302                 check_key_bindings_source_id = 0;
 303                 return FALSE;
 304         }
 305
 306 #ifdef ENABLE_KEYDEF_SCREEN
 307         g_strchomp(buf);
 308         g_strlcat(buf, " (", sizeof(buf));
 309         /* to translators: a key was bound twice in the key editor,
 310            and this is a hint for the user what to press to correct
 311            that */
 312         g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
 313                    get_key_names(CMD_SCREEN_KEYDEF, 0));
 314         g_strlcat(buf, comment, sizeof(buf));
 315         g_strlcat(buf, ")", sizeof(buf));
 316 #endif
 317
 318         screen_status_printf("%s", buf);
 319
 320         doupdate();
 321         return TRUE;
 322 }
 323 #endif
 324
 325 int
 326 main(int argc, const char *argv[])
 327 {
 328         struct sigaction act;
 329 #ifdef ENABLE_LOCALE
 330         const char *charset = NULL;
 331 #endif
 332         GIOChannel *keyboard_channel;
 333 #ifdef ENABLE_LIRC
 334         int lirc_socket;
 335         GIOChannel *lirc_channel = NULL;
 336 #endif
 337
 338 #ifdef ENABLE_LOCALE
 339         /* time and date formatting */
 340         setlocale(LC_TIME,"");
 341         /* care about sorting order etc */
 342         setlocale(LC_COLLATE,"");
 343         /* charset */
 344         setlocale(LC_CTYPE,"");
 345         /* initialize charset conversions */
 346         charset = charset_init();
 347
 348         /* initialize i18n support */
 349 #endif
 350
 351 #ifdef ENABLE_NLS
 352         setlocale(LC_MESSAGES, "");
 353         bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
 354 #ifdef ENABLE_LOCALE
 355         bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
 356 #endif
 357         textdomain(GETTEXT_PACKAGE);
 358 #endif
 359
 360         /* initialize options */
 361         options_init();
 362
 363         /* parse command line options - 1 pass get configuration files */
 364         options_parse(argc, argv);
 365
 366 #ifndef NCMPC_MINI
 367         /* read configuration */
 368         read_configuration();
 369
 370         /* check key bindings */
 371         check_key_bindings(NULL, NULL, 0);
 372 #endif
 373
 374         /* parse command line options - 2 pass */
 375         options_parse(argc, argv);
 376
 377         /* setup signal behavior - SIGINT */
 378         sigemptyset(&act.sa_mask);
 379         act.sa_flags = 0;
 380         act.sa_handler = catch_sigint;
 381         if (sigaction(SIGINT, &act, NULL) < 0) {
 382                 perror("signal");
 383                 exit(EXIT_FAILURE);
 384         }
 385
 386         /* setup signal behavior - SIGTERM */
 387
 388         act.sa_handler = catch_sigint;
 389         if (sigaction(SIGTERM, &act, NULL) < 0) {
 390                 perror("sigaction()");
 391                 exit(EXIT_FAILURE);
 392         }
 393
 394         /* setup signal behavior - SIGCONT */
 395
 396         act.sa_handler = catch_sigcont;
 397         if (sigaction(SIGCONT, &act, NULL) < 0) {
 398                 perror("sigaction(SIGCONT)");
 399                 exit(EXIT_FAILURE);
 400         }
 401
 402         /* setup signal behaviour - SIGHUP*/
 403
 404         act.sa_handler = catch_sigint;
 405         if (sigaction(SIGHUP, &act, NULL) < 0) {
 406                 perror("sigaction(SIGHUP)");
 407                 exit(EXIT_FAILURE);
 408         }
 409
 410         /* setup SIGWINCH */
 411
 412         act.sa_flags = SA_RESTART;
 413         act.sa_handler = catch_sigwinch;
 414         if (sigaction(SIGWINCH, &act, NULL) < 0) {
 415                 perror("sigaction(SIGWINCH)");
 416                 exit(EXIT_FAILURE);
 417         }
 418
 419         /* ignore SIGPIPE */
 420
 421         act.sa_handler = SIG_IGN;
 422         if (sigaction(SIGPIPE, &act, NULL) < 0) {
 423                 perror("sigaction(SIGPIPE)");
 424                 exit(EXIT_FAILURE);
 425         }
 426
 427         ncu_init();
 428
 429 #ifdef ENABLE_LYRICS_SCREEN
 430         lyrics_init();
 431 #endif
 432
 433         /* create mpdclient instance */
 434         mpd = mpdclient_new();
 435
 436         /* initialize curses */
 437         screen_init(mpd);
 438
 439         /* the main loop */
 440         main_loop = g_main_loop_new(NULL, FALSE);
 441
 442         /* watch out for keyboard input */
 443         keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
 444         g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);
 445
 446 #ifdef ENABLE_LIRC
 447         /* watch out for lirc input */
 448         lirc_socket = ncmpc_lirc_open();
 449         if (lirc_socket >= 0) {
 450                 lirc_channel = g_io_channel_unix_new(lirc_socket);
 451                 g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
 452         }
 453 #endif
 454
 455         /* attempt to connect */
 456         reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
 457
 458         update_source_id = g_timeout_add(update_interval,
 459                                          timer_mpd_update,
 460                                          GINT_TO_POINTER(TRUE));
 461 #ifndef NCMPC_MINI
 462         check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
 463 #endif
 464
 465         screen_paint(mpd);
 466
 467         g_main_loop_run(main_loop);
 468
 469         /* cleanup */
 470
 471         cancel_seek_timer();
 472
 473         g_source_remove(update_source_id);
 474
 475 #ifndef NCMPC_MINI
 476         if (check_key_bindings_source_id != 0)
 477                 g_source_remove(check_key_bindings_source_id);
 478 #endif
 479
 480         g_main_loop_unref(main_loop);
 481         g_io_channel_unref(keyboard_channel);
 482
 483 #ifdef ENABLE_LIRC
 484         if (lirc_socket >= 0)
 485                 g_io_channel_unref(lirc_channel);
 486         ncmpc_lirc_close();
 487 #endif
 488
 489         exit_and_cleanup();
 490
 491 #ifdef ENABLE_LYRICS_SCREEN
 492         lyrics_deinit();
 493 #endif
 494
 495         ncu_deinit();
 496         options_deinit();
 497
 498         return 0;
 499 }