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         else if (reconnect_source_id == 0)
 246                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
 247                                                     NULL);
 248
 249 #ifndef NCMPC_MINI
 250         if (options.enable_xterm_title)
 251                 update_xterm_title();
 252 #endif
 253
 254         screen_update(mpd);
 255
 256         mpd->events = 0;
 257
 258         return GPOINTER_TO_INT(data);
 259 }
 260
 261 void begin_input_event(void)
 262 {
 263 }
 264
 265 void end_input_event(void)
 266 {
 267         screen_update(mpd);
 268 }
 269
 270 int do_input_event(command_t cmd)
 271 {
 272         if (cmd == CMD_QUIT) {
 273                 g_main_loop_quit(main_loop);
 274                 return -1;
 275         }
 276
 277         screen_cmd(mpd, cmd);
 278
 279         if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN) {
 280                 /* make sure we don't update the volume yet */
 281                 disable_update_timer();
 282                 enable_update_timer();
 283         }
 284
 285         return 0;
 286 }
 287
 288 static gboolean
 289 keyboard_event(G_GNUC_UNUSED GIOChannel *source,
 290                G_GNUC_UNUSED GIOCondition condition,
 291                G_GNUC_UNUSED gpointer data)
 292 {
 293         command_t cmd;
 294
 295         begin_input_event();
 296
 297         if ((cmd=get_keyboard_command()) != CMD_NONE)
 298                 if (do_input_event(cmd) != 0)
 299                         return FALSE;
 300
 301         end_input_event();
 302         return TRUE;
 303 }
 304
 305 #ifndef NCMPC_MINI
 306 /**
 307  * Check the configured key bindings for errors, and display a status
 308  * message every 10 seconds.
 309  */
 310 static gboolean
 311 timer_check_key_bindings(G_GNUC_UNUSED gpointer data)
 312 {
 313         char buf[256];
 314 #ifdef ENABLE_KEYDEF_SCREEN
 315         char comment[64];
 316 #endif
 317         gboolean key_error;
 318
 319         key_error = check_key_bindings(NULL, buf, sizeof(buf));
 320         if (!key_error) {
 321                 /* no error: disable this timer for the rest of this
 322                    process */
 323                 check_key_bindings_source_id = 0;
 324                 return FALSE;
 325         }
 326
 327 #ifdef ENABLE_KEYDEF_SCREEN
 328         g_strchomp(buf);
 329         g_strlcat(buf, " (", sizeof(buf));
 330         /* to translators: a key was bound twice in the key editor,
 331            and this is a hint for the user what to press to correct
 332            that */
 333         g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
 334                    get_key_names(CMD_SCREEN_KEYDEF, 0));
 335         g_strlcat(buf, comment, sizeof(buf));
 336         g_strlcat(buf, ")", sizeof(buf));
 337 #endif
 338
 339         screen_status_printf("%s", buf);
 340
 341         doupdate();
 342         return TRUE;
 343 }
 344 #endif
 345
 346 int
 347 main(int argc, const char *argv[])
 348 {
 349         struct sigaction act;
 350 #ifdef ENABLE_LOCALE
 351         const char *charset = NULL;
 352 #endif
 353         GIOChannel *keyboard_channel;
 354 #ifdef ENABLE_LIRC
 355         int lirc_socket;
 356         GIOChannel *lirc_channel = NULL;
 357 #endif
 358
 359 #ifdef ENABLE_LOCALE
 360         /* time and date formatting */
 361         setlocale(LC_TIME,"");
 362         /* care about sorting order etc */
 363         setlocale(LC_COLLATE,"");
 364         /* charset */
 365         setlocale(LC_CTYPE,"");
 366         /* initialize charset conversions */
 367         charset = charset_init();
 368
 369         /* initialize i18n support */
 370 #endif
 371
 372 #ifdef ENABLE_NLS
 373         setlocale(LC_MESSAGES, "");
 374         bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
 375 #ifdef ENABLE_LOCALE
 376         bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
 377 #endif
 378         textdomain(GETTEXT_PACKAGE);
 379 #endif
 380
 381         /* initialize options */
 382         options_init();
 383
 384         /* parse command line options - 1 pass get configuration files */
 385         options_parse(argc, argv);
 386
 387 #ifndef NCMPC_MINI
 388         /* read configuration */
 389         read_configuration();
 390
 391         /* check key bindings */
 392         check_key_bindings(NULL, NULL, 0);
 393 #endif
 394
 395         /* parse command line options - 2 pass */
 396         options_parse(argc, argv);
 397
 398         /* setup signal behavior - SIGINT */
 399         sigemptyset(&act.sa_mask);
 400         act.sa_flags = 0;
 401         act.sa_handler = catch_sigint;
 402         if (sigaction(SIGINT, &act, NULL) < 0) {
 403                 perror("signal");
 404                 exit(EXIT_FAILURE);
 405         }
 406
 407         /* setup signal behavior - SIGTERM */
 408
 409         act.sa_handler = catch_sigint;
 410         if (sigaction(SIGTERM, &act, NULL) < 0) {
 411                 perror("sigaction()");
 412                 exit(EXIT_FAILURE);
 413         }
 414
 415         /* setup signal behavior - SIGCONT */
 416
 417         act.sa_handler = catch_sigcont;
 418         if (sigaction(SIGCONT, &act, NULL) < 0) {
 419                 perror("sigaction(SIGCONT)");
 420                 exit(EXIT_FAILURE);
 421         }
 422
 423         /* setup signal behaviour - SIGHUP*/
 424
 425         act.sa_handler = catch_sigint;
 426         if (sigaction(SIGHUP, &act, NULL) < 0) {
 427                 perror("sigaction(SIGHUP)");
 428                 exit(EXIT_FAILURE);
 429         }
 430
 431         /* setup SIGWINCH */
 432
 433         act.sa_flags = SA_RESTART;
 434         act.sa_handler = catch_sigwinch;
 435         if (sigaction(SIGWINCH, &act, NULL) < 0) {
 436                 perror("sigaction(SIGWINCH)");
 437                 exit(EXIT_FAILURE);
 438         }
 439
 440         /* ignore SIGPIPE */
 441
 442         act.sa_handler = SIG_IGN;
 443         if (sigaction(SIGPIPE, &act, NULL) < 0) {
 444                 perror("sigaction(SIGPIPE)");
 445                 exit(EXIT_FAILURE);
 446         }
 447
 448         ncu_init();
 449
 450 #ifdef ENABLE_LYRICS_SCREEN
 451         lyrics_init();
 452 #endif
 453
 454         /* create mpdclient instance */
 455         mpd = mpdclient_new();
 456
 457         /* initialize curses */
 458         screen_init(mpd);
 459
 460         /* the main loop */
 461         main_loop = g_main_loop_new(NULL, FALSE);
 462
 463         /* watch out for keyboard input */
 464         keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
 465         g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);
 466
 467 #ifdef ENABLE_LIRC
 468         /* watch out for lirc input */
 469         lirc_socket = ncmpc_lirc_open();
 470         if (lirc_socket >= 0) {
 471                 lirc_channel = g_io_channel_unix_new(lirc_socket);
 472                 g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
 473         }
 474 #endif
 475
 476         /* attempt to connect */
 477         reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
 478
 479         enable_update_timer();
 480
 481 #ifndef NCMPC_MINI
 482         check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
 483 #endif
 484
 485         screen_paint(mpd);
 486
 487         g_main_loop_run(main_loop);
 488
 489         /* cleanup */
 490
 491         cancel_seek_timer();
 492
 493         disable_update_timer();
 494
 495         if (reconnect_source_id != 0)
 496                 g_source_remove(reconnect_source_id);
 497
 498 #ifndef NCMPC_MINI
 499         if (check_key_bindings_source_id != 0)
 500                 g_source_remove(check_key_bindings_source_id);
 501 #endif
 502
 503         g_main_loop_unref(main_loop);
 504         g_io_channel_unref(keyboard_channel);
 505
 506 #ifdef ENABLE_LIRC
 507         if (lirc_socket >= 0)
 508                 g_io_channel_unref(lirc_channel);
 509         ncmpc_lirc_close();
 510 #endif
 511
 512         exit_and_cleanup();
 513
 514 #ifdef ENABLE_LYRICS_SCREEN
 515         lyrics_deinit();
 516 #endif
 517
 518         ncu_deinit();
 519         options_deinit();
 520
 521         return 0;
 522 }