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 bool
 182 should_enable_update_timer(void)
 183 {
 184         return mpdclient_is_connected(mpd)
 185 #ifndef NCMPC_MINI
 186                 || options.display_time
 187 #endif
 188                 ;
 189 }
 190
 191 static void
 192 auto_update_timer(void)
 193 {
 194         if (should_enable_update_timer())
 195                 enable_update_timer();
 196         else
 197                 disable_update_timer();
 198 }
 199
 200 static void
 201 check_reconnect(void);
 202
 203 static void
 204 do_mpd_update(void)
 205 {
 206         if (mpdclient_is_connected(mpd))
 207                 mpdclient_update(mpd);
 208
 209 #ifndef NCMPC_MINI
 210         if (options.enable_xterm_title)
 211                 update_xterm_title();
 212 #endif
 213
 214         screen_update(mpd);
 215         mpd->events = 0;
 216
 217         check_reconnect();
 218 }
 219
 220 /**
 221  * This timer is installed when the connection to the MPD server is
 222  * broken.  It tries to recover by reconnecting periodically.
 223  */
 224 static gboolean
 225 timer_reconnect(G_GNUC_UNUSED gpointer data)
 226 {
 227         bool success;
 228
 229         assert(!mpdclient_is_connected(mpd));
 230
 231         reconnect_source_id = 0;
 232
 233         screen_status_printf(_("Connecting to %s...  [Press %s to abort]"),
 234                              options.host, get_key_names(CMD_QUIT,0) );
 235         doupdate();
 236
 237         mpdclient_disconnect(mpd);
 238         success = mpdclient_connect(mpd,
 239                                     options.host, options.port,
 240                                     1.5,
 241                                     options.password);
 242         if (!success) {
 243                 /* try again in 5 seconds */
 244                 reconnect_source_id = g_timeout_add(5000,
 245                                                     timer_reconnect, NULL);
 246                 return FALSE;
 247         }
 248
 249 #ifndef NCMPC_MINI
 250         /* quit if mpd is pre 0.11.0 - song id not supported by mpd */
 251         if (mpd_connection_cmp_server_version(mpd->connection, 0, 12, 0) < 0) {
 252                 const unsigned *version =
 253                         mpd_connection_get_server_version(mpd->connection);
 254                 screen_status_printf(_("Error: MPD version %d.%d.%d is to old (%s needed)"),
 255                                      version[0], version[1], version[2],
 256                                      "0.12.0");
 257                 mpdclient_disconnect(mpd);
 258                 doupdate();
 259
 260                 /* try again after 30 seconds */
 261                 reconnect_source_id = g_timeout_add(30000,
 262                                                     timer_reconnect, NULL);
 263                 return FALSE;
 264         }
 265 #endif
 266
 267         screen_status_printf(_("Connected to %s"),
 268                              options.host != NULL
 269                              ? options.host : "localhost");
 270         doupdate();
 271
 272         /* update immediately */
 273         mpd->events = MPD_IDLE_DATABASE|MPD_IDLE_STORED_PLAYLIST|
 274                 MPD_IDLE_QUEUE|MPD_IDLE_PLAYER|MPD_IDLE_MIXER|MPD_IDLE_OUTPUT|
 275                 MPD_IDLE_OPTIONS|MPD_IDLE_UPDATE;
 276
 277         do_mpd_update();
 278
 279         auto_update_timer();
 280
 281         return FALSE;
 282 }
 283
 284 static void
 285 check_reconnect(void)
 286 {
 287         if (!mpdclient_is_connected(mpd) && reconnect_source_id == 0)
 288                 /* reconnect when the connection is lost */
 289                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
 290                                                     NULL);
 291 }
 292
 293 static gboolean
 294 timer_mpd_update(G_GNUC_UNUSED gpointer data)
 295 {
 296         do_mpd_update();
 297
 298         if (should_enable_update_timer())
 299                 return true;
 300         else {
 301                 update_source_id = 0;
 302                 return false;
 303         }
 304 }
 305
 306 void begin_input_event(void)
 307 {
 308 }
 309
 310 void end_input_event(void)
 311 {
 312         screen_update(mpd);
 313         mpd->events = 0;
 314
 315         check_reconnect();
 316         auto_update_timer();
 317 }
 318
 319 int do_input_event(command_t cmd)
 320 {
 321         if (cmd == CMD_QUIT) {
 322                 g_main_loop_quit(main_loop);
 323                 return -1;
 324         }
 325
 326         screen_cmd(mpd, cmd);
 327
 328         if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN)
 329                 /* make sure we don't update the volume yet */
 330                 disable_update_timer();
 331
 332         return 0;
 333 }
 334
 335 static gboolean
 336 keyboard_event(G_GNUC_UNUSED GIOChannel *source,
 337                G_GNUC_UNUSED GIOCondition condition,
 338                G_GNUC_UNUSED gpointer data)
 339 {
 340         command_t cmd;
 341
 342         begin_input_event();
 343
 344         if ((cmd=get_keyboard_command()) != CMD_NONE)
 345                 if (do_input_event(cmd) != 0)
 346                         return FALSE;
 347
 348         end_input_event();
 349         return TRUE;
 350 }
 351
 352 #ifndef NCMPC_MINI
 353 /**
 354  * Check the configured key bindings for errors, and display a status
 355  * message every 10 seconds.
 356  */
 357 static gboolean
 358 timer_check_key_bindings(G_GNUC_UNUSED gpointer data)
 359 {
 360         char buf[256];
 361 #ifdef ENABLE_KEYDEF_SCREEN
 362         char comment[64];
 363 #endif
 364         gboolean key_error;
 365
 366         key_error = check_key_bindings(NULL, buf, sizeof(buf));
 367         if (!key_error) {
 368                 /* no error: disable this timer for the rest of this
 369                    process */
 370                 check_key_bindings_source_id = 0;
 371                 return FALSE;
 372         }
 373
 374 #ifdef ENABLE_KEYDEF_SCREEN
 375         g_strchomp(buf);
 376         g_strlcat(buf, " (", sizeof(buf));
 377         /* to translators: a key was bound twice in the key editor,
 378            and this is a hint for the user what to press to correct
 379            that */
 380         g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
 381                    get_key_names(CMD_SCREEN_KEYDEF, 0));
 382         g_strlcat(buf, comment, sizeof(buf));
 383         g_strlcat(buf, ")", sizeof(buf));
 384 #endif
 385
 386         screen_status_printf("%s", buf);
 387
 388         doupdate();
 389         return TRUE;
 390 }
 391 #endif
 392
 393 int
 394 main(int argc, const char *argv[])
 395 {
 396         struct sigaction act;
 397 #ifdef ENABLE_LOCALE
 398         const char *charset = NULL;
 399 #endif
 400         GIOChannel *keyboard_channel;
 401 #ifdef ENABLE_LIRC
 402         int lirc_socket;
 403         GIOChannel *lirc_channel = NULL;
 404 #endif
 405
 406 #ifdef ENABLE_LOCALE
 407         /* time and date formatting */
 408         setlocale(LC_TIME,"");
 409         /* care about sorting order etc */
 410         setlocale(LC_COLLATE,"");
 411         /* charset */
 412         setlocale(LC_CTYPE,"");
 413         /* initialize charset conversions */
 414         charset = charset_init();
 415
 416         /* initialize i18n support */
 417 #endif
 418
 419 #ifdef ENABLE_NLS
 420         setlocale(LC_MESSAGES, "");
 421         bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
 422 #ifdef ENABLE_LOCALE
 423         bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
 424 #endif
 425         textdomain(GETTEXT_PACKAGE);
 426 #endif
 427
 428         /* initialize options */
 429         options_init();
 430
 431         /* parse command line options - 1 pass get configuration files */
 432         options_parse(argc, argv);
 433
 434 #ifndef NCMPC_MINI
 435         /* read configuration */
 436         read_configuration();
 437
 438         /* check key bindings */
 439         check_key_bindings(NULL, NULL, 0);
 440 #endif
 441
 442         /* parse command line options - 2 pass */
 443         options_parse(argc, argv);
 444
 445         /* setup signal behavior - SIGINT */
 446         sigemptyset(&act.sa_mask);
 447         act.sa_flags = 0;
 448         act.sa_handler = catch_sigint;
 449         if (sigaction(SIGINT, &act, NULL) < 0) {
 450                 perror("signal");
 451                 exit(EXIT_FAILURE);
 452         }
 453
 454         /* setup signal behavior - SIGTERM */
 455
 456         act.sa_handler = catch_sigint;
 457         if (sigaction(SIGTERM, &act, NULL) < 0) {
 458                 perror("sigaction()");
 459                 exit(EXIT_FAILURE);
 460         }
 461
 462         /* setup signal behavior - SIGCONT */
 463
 464         act.sa_handler = catch_sigcont;
 465         if (sigaction(SIGCONT, &act, NULL) < 0) {
 466                 perror("sigaction(SIGCONT)");
 467                 exit(EXIT_FAILURE);
 468         }
 469
 470         /* setup signal behaviour - SIGHUP*/
 471
 472         act.sa_handler = catch_sigint;
 473         if (sigaction(SIGHUP, &act, NULL) < 0) {
 474                 perror("sigaction(SIGHUP)");
 475                 exit(EXIT_FAILURE);
 476         }
 477
 478         /* setup SIGWINCH */
 479
 480         act.sa_flags = SA_RESTART;
 481         act.sa_handler = catch_sigwinch;
 482         if (sigaction(SIGWINCH, &act, NULL) < 0) {
 483                 perror("sigaction(SIGWINCH)");
 484                 exit(EXIT_FAILURE);
 485         }
 486
 487         /* ignore SIGPIPE */
 488
 489         act.sa_handler = SIG_IGN;
 490         if (sigaction(SIGPIPE, &act, NULL) < 0) {
 491                 perror("sigaction(SIGPIPE)");
 492                 exit(EXIT_FAILURE);
 493         }
 494
 495         ncu_init();
 496
 497 #ifdef ENABLE_LYRICS_SCREEN
 498         lyrics_init();
 499 #endif
 500
 501         /* create mpdclient instance */
 502         mpd = mpdclient_new();
 503
 504         /* initialize curses */
 505         screen_init(mpd);
 506
 507         /* the main loop */
 508         main_loop = g_main_loop_new(NULL, FALSE);
 509
 510         /* watch out for keyboard input */
 511         keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
 512         g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);
 513
 514 #ifdef ENABLE_LIRC
 515         /* watch out for lirc input */
 516         lirc_socket = ncmpc_lirc_open();
 517         if (lirc_socket >= 0) {
 518                 lirc_channel = g_io_channel_unix_new(lirc_socket);
 519                 g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
 520         }
 521 #endif
 522
 523         /* attempt to connect */
 524         reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
 525
 526         auto_update_timer();
 527
 528 #ifndef NCMPC_MINI
 529         check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
 530 #endif
 531
 532         screen_paint(mpd);
 533
 534         g_main_loop_run(main_loop);
 535
 536         /* cleanup */
 537
 538         cancel_seek_timer();
 539
 540         disable_update_timer();
 541
 542         if (reconnect_source_id != 0)
 543                 g_source_remove(reconnect_source_id);
 544
 545 #ifndef NCMPC_MINI
 546         if (check_key_bindings_source_id != 0)
 547                 g_source_remove(check_key_bindings_source_id);
 548 #endif
 549
 550         g_main_loop_unref(main_loop);
 551         g_io_channel_unref(keyboard_channel);
 552
 553 #ifdef ENABLE_LIRC
 554         if (lirc_socket >= 0)
 555                 g_io_channel_unref(lirc_channel);
 556         ncmpc_lirc_close();
 557 #endif
 558
 559         exit_and_cleanup();
 560
 561 #ifdef ENABLE_LYRICS_SCREEN
 562         lyrics_deinit();
 563 #endif
 564
 565         ncu_deinit();
 566         options_deinit();
 567
 568         return 0;
 569 }