Code

cae4994e361ba1e69afa1c4d2b4733330eac5885
[ncmpc.git] / 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 */
20 #include "config.h"
21 #include "ncmpc.h"
22 #include "mpdclient.h"
23 #include "gidle.h"
24 #include "charset.h"
25 #include "options.h"
26 #include "command.h"
27 #include "ncu.h"
28 #include "screen.h"
29 #include "screen_utils.h"
30 #include "screen_message.h"
31 #include "strfsong.h"
32 #include "i18n.h"
33 #include "player_command.h"
35 #ifndef NCMPC_MINI
36 #include "conf.h"
37 #endif
39 #ifdef ENABLE_LYRICS_SCREEN
40 #include "lyrics.h"
41 #endif
43 #ifdef ENABLE_LIRC
44 #include "lirc.h"
45 #endif
47 #include <mpd/client.h>
49 #include <stdlib.h>
50 #include <unistd.h>
51 #include <signal.h>
52 #include <string.h>
54 #ifdef ENABLE_LOCALE
55 #include <locale.h>
56 #endif
58 /* time between mpd updates [ms] */
59 static const guint update_interval = 500;
61 #define BUFSIZE 1024
63 static struct mpdclient *mpd = NULL;
64 static GMainLoop *main_loop;
65 static guint reconnect_source_id, update_source_id;
67 #ifndef NCMPC_MINI
68 static guint check_key_bindings_source_id;
69 #endif
71 #ifndef NCMPC_MINI
72 static void
73 update_xterm_title(void)
74 {
75         static char title[BUFSIZE];
76         char tmp[BUFSIZE];
77         struct mpd_status *status = NULL;
78         const struct mpd_song *song = NULL;
80         if (mpd) {
81                 status = mpd->status;
82                 song = mpd->song;
83         }
85         if (options.xterm_title_format && status && song &&
86             mpd_status_get_state(status) == MPD_STATE_PLAY)
87                 strfsong(tmp, BUFSIZE, options.xterm_title_format, song);
88         else
89                 g_strlcpy(tmp, PACKAGE " version " VERSION, BUFSIZE);
91         if (strncmp(title, tmp, BUFSIZE)) {
92                 g_strlcpy(title, tmp, BUFSIZE);
93                 set_xterm_title("%s", title);
94         }
95 }
96 #endif
98 static void
99 exit_and_cleanup(void)
101         screen_exit();
102 #ifndef NCMPC_MINI
103         set_xterm_title("");
104 #endif
105         printf("\n");
107         if (mpd) {
108                 mpdclient_disconnect(mpd);
109                 mpdclient_free(mpd);
110         }
113 static void
114 catch_sigint(G_GNUC_UNUSED int sig)
116         g_main_loop_quit(main_loop);
120 static void
121 catch_sigcont(G_GNUC_UNUSED int sig)
123         screen_resize(mpd);
126 void
127 sigstop(void)
129         def_prog_mode();  /* save the tty modes */
130         endwin();         /* end curses mode temporarily */
131         kill(0, SIGSTOP); /* issue SIGSTOP */
134 static guint timer_sigwinch_id;
136 static gboolean
137 timer_sigwinch(G_GNUC_UNUSED gpointer data)
139         /* the following causes the screen to flicker.  There might be
140            better solutions, but I believe it isn't all that
141            important. */
143         endwin();
144         refresh();
145         screen_resize(mpd);
147         return FALSE;
150 static void
151 catch_sigwinch(G_GNUC_UNUSED int sig)
153         if (timer_sigwinch_id != 0)
154                 g_source_remove(timer_sigwinch_id);
156         timer_sigwinch_id = g_timeout_add(100, timer_sigwinch, NULL);
159 static void
160 idle_callback(enum mpd_error error,
161               G_GNUC_UNUSED enum mpd_server_error server_error,
162               const char *message, enum mpd_idle events,
163               G_GNUC_UNUSED void *ctx);
165 static gboolean
166 timer_mpd_update(gpointer data);
168 static void
169 enable_update_timer(void)
171         if (update_source_id != 0)
172                 return;
174         update_source_id = g_timeout_add(update_interval,
175                                          timer_mpd_update, NULL);
178 static void
179 disable_update_timer(void)
181         if (update_source_id == 0)
182                 return;
184         g_source_remove(update_source_id);
185         update_source_id = 0;
188 static bool
189 should_enable_update_timer(void)
191         return (mpdclient_is_connected(mpd) &&
192                 (mpd->source == NULL || /* "idle" not supported */
193                  (mpd->status != NULL &&
194                   mpd_status_get_state(mpd->status) == MPD_STATE_PLAY)))
195 #ifndef NCMPC_MINI
196                 || options.display_time
197 #endif
198                 ;
201 static void
202 auto_update_timer(void)
204         if (should_enable_update_timer())
205                 enable_update_timer();
206         else
207                 disable_update_timer();
210 static void
211 check_reconnect(void);
213 static void
214 do_mpd_update(void)
216         if (mpdclient_is_connected(mpd) &&
217             (mpd->source == NULL || mpd->events != 0 ||
218              (mpd->status != NULL &&
219               mpd_status_get_state(mpd->status) == MPD_STATE_PLAY)))
220                 mpdclient_update(mpd);
222 #ifndef NCMPC_MINI
223         if (options.enable_xterm_title)
224                 update_xterm_title();
225 #endif
227         screen_update(mpd);
228         mpd->events = 0;
230         mpdclient_put_connection(mpd);
231         check_reconnect();
234 /**
235  * This timer is installed when the connection to the MPD server is
236  * broken.  It tries to recover by reconnecting periodically.
237  */
238 static gboolean
239 timer_reconnect(G_GNUC_UNUSED gpointer data)
241         bool success;
242         struct mpd_connection *connection;
244         assert(!mpdclient_is_connected(mpd));
246         reconnect_source_id = 0;
248         screen_status_printf(_("Connecting to %s...  [Press %s to abort]"),
249                              options.host, get_key_names(CMD_QUIT,0) );
250         doupdate();
252         mpdclient_disconnect(mpd);
253         success = mpdclient_connect(mpd,
254                                     options.host, options.port,
255                                     1.5,
256                                     options.password);
257         if (!success) {
258                 /* try again in 5 seconds */
259                 reconnect_source_id = g_timeout_add(5000,
260                                                     timer_reconnect, NULL);
261                 return FALSE;
262         }
264         connection = mpdclient_get_connection(mpd);
266 #ifndef NCMPC_MINI
267         /* quit if mpd is pre 0.11.0 - song id not supported by mpd */
268         if (mpd_connection_cmp_server_version(connection, 0, 12, 0) < 0) {
269                 const unsigned *version =
270                         mpd_connection_get_server_version(connection);
271                 screen_status_printf(_("Error: MPD version %d.%d.%d is to old (%s needed)"),
272                                      version[0], version[1], version[2],
273                                      "0.12.0");
274                 mpdclient_disconnect(mpd);
275                 doupdate();
277                 /* try again after 30 seconds */
278                 reconnect_source_id = g_timeout_add(30000,
279                                                     timer_reconnect, NULL);
280                 return FALSE;
281         }
282 #endif
284         if (mpd_connection_cmp_server_version(connection,
285                                               0, 14, 0) >= 0)
286                 mpd->source = mpd_glib_new(connection,
287                                            idle_callback, mpd);
289         screen_status_printf(_("Connected to %s"),
290                              options.host != NULL
291                              ? options.host : "localhost");
292         doupdate();
294         /* update immediately */
295         mpd->events = MPD_IDLE_DATABASE|MPD_IDLE_STORED_PLAYLIST|
296                 MPD_IDLE_QUEUE|MPD_IDLE_PLAYER|MPD_IDLE_MIXER|MPD_IDLE_OUTPUT|
297                 MPD_IDLE_OPTIONS|MPD_IDLE_UPDATE;
299         do_mpd_update();
301         auto_update_timer();
303         return FALSE;
306 static void
307 check_reconnect(void)
309         if (!mpdclient_is_connected(mpd) && reconnect_source_id == 0)
310                 /* reconnect when the connection is lost */
311                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
312                                                     NULL);
315 /**
316  * This function is called by the gidle.c library when MPD sends us an
317  * idle event (or when the connectiond dies).
318  */
319 static void
320 idle_callback(enum mpd_error error, enum mpd_server_error server_error,
321               const char *message, enum mpd_idle events,
322               void *ctx)
324         struct mpdclient *c = ctx;
325         struct mpd_connection *connection;
327         c->idle = false;
329         connection = mpdclient_get_connection(c);
330         assert(connection != NULL);
332         if (error != MPD_ERROR_SUCCESS) {
333                 char *allocated;
335                 if (error == MPD_ERROR_SERVER &&
336                     server_error == MPD_SERVER_ERROR_UNKNOWN_CMD) {
337                         /* the "idle" command is not supported - fall
338                            back to timer based polling */
339                         mpd_glib_free(c->source);
340                         c->source = NULL;
341                         auto_update_timer();
342                         return;
343                 }
345                 if (error == MPD_ERROR_SERVER)
346                         message = allocated = utf8_to_locale(message);
347                 else
348                         allocated = NULL;
349                 screen_status_message(message);
350                 g_free(allocated);
351                 screen_bell();
352                 doupdate();
354                 mpdclient_disconnect(c);
355                 screen_update(mpd);
356                 reconnect_source_id = g_timeout_add(1000, timer_reconnect,
357                                                     NULL);
358                 return;
359         }
361         c->events |= events;
362         mpdclient_update(c);
364 #ifndef NCMPC_MINI
365         if (options.enable_xterm_title)
366                 update_xterm_title();
367 #endif
369         screen_update(mpd);
370         c->events = 0;
372         mpdclient_put_connection(c);
373         check_reconnect();
374         auto_update_timer();
377 static gboolean
378 timer_mpd_update(G_GNUC_UNUSED gpointer data)
380         do_mpd_update();
382         if (should_enable_update_timer())
383                 return true;
384         else {
385                 update_source_id = 0;
386                 return false;
387         }
390 void begin_input_event(void)
394 void end_input_event(void)
396         screen_update(mpd);
397         mpd->events = 0;
399         mpdclient_put_connection(mpd);
400         check_reconnect();
401         auto_update_timer();
404 int do_input_event(command_t cmd)
406         if (cmd == CMD_QUIT) {
407                 g_main_loop_quit(main_loop);
408                 return -1;
409         }
411         screen_cmd(mpd, cmd);
413         if (cmd == CMD_VOLUME_UP || cmd == CMD_VOLUME_DOWN)
414                 /* make sure we don't update the volume yet */
415                 disable_update_timer();
417         return 0;
420 static gboolean
421 keyboard_event(G_GNUC_UNUSED GIOChannel *source,
422                G_GNUC_UNUSED GIOCondition condition,
423                G_GNUC_UNUSED gpointer data)
425         command_t cmd;
427         begin_input_event();
429         if ((cmd=get_keyboard_command()) != CMD_NONE)
430                 if (do_input_event(cmd) != 0)
431                         return FALSE;
433         end_input_event();
434         return TRUE;
437 #ifndef NCMPC_MINI
438 /**
439  * Check the configured key bindings for errors, and display a status
440  * message every 10 seconds.
441  */
442 static gboolean
443 timer_check_key_bindings(G_GNUC_UNUSED gpointer data)
445         char buf[256];
446 #ifdef ENABLE_KEYDEF_SCREEN
447         char comment[64];
448 #endif
449         gboolean key_error;
451         key_error = check_key_bindings(NULL, buf, sizeof(buf));
452         if (!key_error) {
453                 /* no error: disable this timer for the rest of this
454                    process */
455                 check_key_bindings_source_id = 0;
456                 return FALSE;
457         }
459 #ifdef ENABLE_KEYDEF_SCREEN
460         g_strchomp(buf);
461         g_strlcat(buf, " (", sizeof(buf));
462         /* to translators: a key was bound twice in the key editor,
463            and this is a hint for the user what to press to correct
464            that */
465         g_snprintf(comment, sizeof(comment), _("press %s for the key editor"),
466                    get_key_names(CMD_SCREEN_KEYDEF, 0));
467         g_strlcat(buf, comment, sizeof(buf));
468         g_strlcat(buf, ")", sizeof(buf));
469 #endif
471         screen_status_printf("%s", buf);
473         doupdate();
474         return TRUE;
476 #endif
478 int
479 main(int argc, const char *argv[])
481         struct sigaction act;
482 #ifdef ENABLE_LOCALE
483         const char *charset = NULL;
484 #endif
485         GIOChannel *keyboard_channel;
486 #ifdef ENABLE_LIRC
487         int lirc_socket;
488         GIOChannel *lirc_channel = NULL;
489 #endif
491 #ifdef ENABLE_LOCALE
492         /* time and date formatting */
493         setlocale(LC_TIME,"");
494         /* care about sorting order etc */
495         setlocale(LC_COLLATE,"");
496         /* charset */
497         setlocale(LC_CTYPE,"");
498         /* initialize charset conversions */
499         charset = charset_init();
501         /* initialize i18n support */
502 #endif
504 #ifdef ENABLE_NLS
505         setlocale(LC_MESSAGES, "");
506         bindtextdomain(GETTEXT_PACKAGE, LOCALE_DIR);
507 #ifdef ENABLE_LOCALE
508         bind_textdomain_codeset(GETTEXT_PACKAGE, charset);
509 #endif
510         textdomain(GETTEXT_PACKAGE);
511 #endif
513         /* initialize options */
514         options_init();
516         /* parse command line options - 1 pass get configuration files */
517         options_parse(argc, argv);
519 #ifndef NCMPC_MINI
520         /* read configuration */
521         read_configuration();
523         /* check key bindings */
524         check_key_bindings(NULL, NULL, 0);
525 #endif
527         /* parse command line options - 2 pass */
528         options_parse(argc, argv);
530         /* setup signal behavior - SIGINT */
531         sigemptyset(&act.sa_mask);
532         act.sa_flags = 0;
533         act.sa_handler = catch_sigint;
534         if (sigaction(SIGINT, &act, NULL) < 0) {
535                 perror("signal");
536                 exit(EXIT_FAILURE);
537         }
539         /* setup signal behavior - SIGTERM */
541         act.sa_handler = catch_sigint;
542         if (sigaction(SIGTERM, &act, NULL) < 0) {
543                 perror("sigaction()");
544                 exit(EXIT_FAILURE);
545         }
547         /* setup signal behavior - SIGCONT */
549         act.sa_handler = catch_sigcont;
550         if (sigaction(SIGCONT, &act, NULL) < 0) {
551                 perror("sigaction(SIGCONT)");
552                 exit(EXIT_FAILURE);
553         }
555         /* setup signal behaviour - SIGHUP*/
557         act.sa_handler = catch_sigint;
558         if (sigaction(SIGHUP, &act, NULL) < 0) {
559                 perror("sigaction(SIGHUP)");
560                 exit(EXIT_FAILURE);
561         }
563         /* setup SIGWINCH */
565         act.sa_flags = SA_RESTART;
566         act.sa_handler = catch_sigwinch;
567         if (sigaction(SIGWINCH, &act, NULL) < 0) {
568                 perror("sigaction(SIGWINCH)");
569                 exit(EXIT_FAILURE);
570         }
572         /* ignore SIGPIPE */
574         act.sa_handler = SIG_IGN;
575         if (sigaction(SIGPIPE, &act, NULL) < 0) {
576                 perror("sigaction(SIGPIPE)");
577                 exit(EXIT_FAILURE);
578         }
580         ncu_init();
582 #ifdef ENABLE_LYRICS_SCREEN
583         lyrics_init();
584 #endif
586         /* create mpdclient instance */
587         mpd = mpdclient_new();
589         /* initialize curses */
590         screen_init(mpd);
592         /* the main loop */
593         main_loop = g_main_loop_new(NULL, FALSE);
595         /* watch out for keyboard input */
596         keyboard_channel = g_io_channel_unix_new(STDIN_FILENO);
597         g_io_add_watch(keyboard_channel, G_IO_IN, keyboard_event, NULL);
599 #ifdef ENABLE_LIRC
600         /* watch out for lirc input */
601         lirc_socket = ncmpc_lirc_open();
602         if (lirc_socket >= 0) {
603                 lirc_channel = g_io_channel_unix_new(lirc_socket);
604                 g_io_add_watch(lirc_channel, G_IO_IN, lirc_event, NULL);
605         }
606 #endif
608         /* attempt to connect */
609         reconnect_source_id = g_timeout_add(1, timer_reconnect, NULL);
611         auto_update_timer();
613 #ifndef NCMPC_MINI
614         check_key_bindings_source_id = g_timeout_add(10000, timer_check_key_bindings, NULL);
615 #endif
617         screen_paint(mpd);
619         g_main_loop_run(main_loop);
621         /* cleanup */
623         cancel_seek_timer();
625         disable_update_timer();
627         if (reconnect_source_id != 0)
628                 g_source_remove(reconnect_source_id);
630 #ifndef NCMPC_MINI
631         if (check_key_bindings_source_id != 0)
632                 g_source_remove(check_key_bindings_source_id);
633 #endif
635         g_main_loop_unref(main_loop);
636         g_io_channel_unref(keyboard_channel);
638 #ifdef ENABLE_LIRC
639         if (lirc_socket >= 0)
640                 g_io_channel_unref(lirc_channel);
641         ncmpc_lirc_close();
642 #endif
644         exit_and_cleanup();
646 #ifdef ENABLE_LYRICS_SCREEN
647         lyrics_deinit();
648 #endif
650         ncu_deinit();
651         options_deinit();
653         return 0;