mp3_afh.c: set bitrate, frequency and channels of struct audio_file_info
[paraslash.git] / gui.c
1 /*
2 * Copyright (C) 1998-2007 Andre Noll <maan@systemlinux.org>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
17 */
18
19 /** \file gui.c ncurses-based interface for paraslash */
20
21 #include "gui.cmdline.h"
22 #include "para.h"
23 #include "gui.h"
24 #include <curses.h>
25 #include "ringbuffer.h"
26 #include "string.h"
27 #include "fd.h"
28 #include "error.h"
29 #include "signal.h"
30
31 /** define the array of error lists needed by para_gui */
32 INIT_GUI_ERRLISTS;
33 extern const char *status_item_list[NUM_STAT_ITEMS];
34 static char *stat_content[NUM_STAT_ITEMS];
35
36 #define STANDARD_STATUS_BAR "para_gui " PACKAGE_VERSION " (hit ? for help)"
37
38 static int signal_pipe;
39
40 static void finish(int sig);
41
42 static struct win_data {
43 WINDOW *win;
44 NCURSES_SIZE_T begx;
45 NCURSES_SIZE_T begy;
46 NCURSES_SIZE_T cols;
47 NCURSES_SIZE_T lines;
48 } top, bot, sb, in, sep;
49
50 #define RINGBUFFER_SIZE 512
51 struct rb_entry {
52 char *msg;
53 size_t len;
54 int color;
55 };
56 void *bot_win_rb;
57 #define NUM_LINES(len) (1 + (len) / bot.cols)
58
59 static unsigned scroll_position;
60
61 static int cmd_died, curses_active;
62 static pid_t cmd_pid;
63
64 static int command_pipe = -1;
65 static int audiod_pipe = -1;
66 static struct gui_args_info conf;
67
68 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
69
70
71 #define COLOR_STATUSBAR 32
72 #define COLOR_COMMAND 33
73 #define COLOR_OUTPUT 34
74 #define COLOR_MSG 35
75 #define COLOR_ERRMSG 36
76 #define COLOR_WELCOME 37
77 #define COLOR_SEPARATOR 38
78 #define COLOR_TOP 39
79 #define COLOR_BOT 40
80
81 struct gui_command {
82 const char *key;
83 const char *name;
84 const char *description;
85 void (*handler)(void);
86 };
87
88 struct stat_item {
89 char name[MAXLINE];
90 char prefix[MAXLINE];
91 char postfix[MAXLINE];
92 unsigned y;
93 unsigned x;
94 unsigned len;
95 int fg, bg;
96 int align;
97 char content[MAXLINE];
98 };
99
100 static struct gui_theme theme;
101
102 int _argc;
103 char **_argv;
104
105 static void com_help(void);
106 static void com_reread_conf(void);
107 static void com_enlarge_top_win(void);
108 static void com_shrink_top_win(void);
109 static void com_version(void);
110 static void com_quit(void);
111 static void com_refresh(void);
112 static void com_ll_incr(void);
113 static void com_ll_decr(void);
114 static void com_prev_theme(void);
115 static void com_next_theme(void);
116 static void com_scroll_up(void);
117 static void com_scroll_down(void);
118 static void com_page_up(void);
119 static void com_page_down(void);
120
121 struct gui_command command_list[] = {
122 {
123 .key = "?",
124 .name = "help",
125 .description = "print help",
126 .handler = com_help
127 }, {
128 .key = "+",
129 .name = "enlarge_win",
130 .description = "enlarge the top window",
131 .handler = com_enlarge_top_win
132 }, {
133 .key = "-",
134 .name = "shrink_win",
135 .description = "shrink the top window",
136 .handler = com_shrink_top_win
137 }, {
138 .key = "r",
139 .name = "reread_conf",
140 .description = "reread configuration file",
141 .handler = com_reread_conf
142 }, {
143 .key = "q",
144 .name = "quit",
145 .description = "exit para_gui",
146 .handler = com_quit
147 }, {
148 .key = "^L",
149 .name = "refresh",
150 .description = "redraw the screen",
151 .handler = com_refresh
152 }, {
153 .key = ".",
154 .name = "next_theme",
155 .description = "switch to next theme",
156 .handler = com_next_theme
157 }, {
158 .key = ",",
159 .name = "prev_theme",
160 .description = "switch to previous stream",
161 .handler = com_prev_theme
162 }, {
163 .key = ">",
164 .name = "ll_incr",
165 .description = "increase loglevel (decreases verbosity)",
166 .handler = com_ll_incr
167 }, {
168 .key = "<",
169 .name = "ll_decr",
170 .description = "decrease loglevel (increases verbosity)",
171 .handler = com_ll_decr
172 }, {
173 .key = "V",
174 .name = "version",
175 .description = "show the para_gui version",
176 .handler = com_version
177 }, {
178 .key = "<up>",
179 .name = "scroll_up",
180 .description = "scroll up one line",
181 .handler = com_scroll_up
182 }, {
183 .key = "<down>",
184 .name = "scroll_down",
185 .description = "scroll down one line",
186 .handler = com_scroll_down
187 }, {
188 .key = "<ppage>",
189 .name = "page_up",
190 .description = "scroll up one page",
191 .handler = com_page_up
192 }, {
193 .key = "<npage>",
194 .name = "page_down",
195 .description = "scroll down one page",
196 .handler = com_page_down
197 }, {
198 .handler = NULL
199 }
200 };
201
202 static int find_cmd_byname(char *name)
203 {
204 int i;
205
206 for (i = 0; command_list[i].handler; i++)
207 if (!strcmp(command_list[i].name, name))
208 return i;
209 return -1;
210 }
211
212 /* taken from mutt */
213 static char *km_keyname(int c)
214 {
215 static char buf[10];
216
217 if (c == KEY_UP) {
218 sprintf(buf, "<up>");
219 return buf;
220 }
221 if (c == KEY_DOWN) {
222 sprintf(buf, "<down>");
223 return buf;
224 }
225 if (c == KEY_LEFT) {
226 sprintf(buf, "<left>");
227 return buf;
228 }
229 if (c == KEY_RIGHT) {
230 sprintf(buf, "<right>");
231 return buf;
232 }
233 if (c == KEY_NPAGE) {
234 sprintf(buf, "<npage>");
235 return buf;
236 }
237 if (c == KEY_PPAGE) {
238 sprintf(buf, "<ppage>");
239 return buf;
240 }
241 if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
242 if (c < 0)
243 c += 256;
244 if (c < 128) {
245 buf[0] = '^';
246 buf[1] = (c + '@') & 0x7f;
247 buf[2] = 0;
248 } else
249 snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
250 (c >> 3) & 7, c & 7);
251 } else if (c >= KEY_F0 && c < KEY_F(256))
252 sprintf(buf, "<F%d>", c - KEY_F0);
253 else if (isprint(c))
254 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
255 else
256 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
257 return buf;
258 }
259
260 static char *configfile_exists(void)
261 {
262 static char *config_file;
263 char *tmp;
264
265 if (!conf.config_file_given) {
266 if (!config_file) {
267 char *home = para_homedir();
268 config_file = make_message("%s/.paraslash/gui.conf",
269 home);
270 free(home);
271 }
272 tmp = config_file;
273 } else
274 tmp = conf.config_file_arg;
275 return file_exists(tmp)? tmp: NULL;
276 }
277
278 /*
279 * print num spaces to curses window
280 */
281 static void add_spaces(WINDOW* win, unsigned int num)
282 {
283 while (num > 0) {
284 num--;
285 waddstr(win, " ");
286 }
287 }
288
289 /*
290 * print aligned string to curses window. This function always prints
291 * exactly len chars.
292 */
293 static int align_str(WINDOW* win, const char *string, unsigned int len,
294 unsigned int align)
295 {
296 int num; /* of spaces */
297 char *str;
298
299 if (!win || !string)
300 return -1;
301 num = len - strlen(string);
302 str = para_strdup(string);
303 if (num < 0) {
304 str[len] = '\0';
305 num = 0;
306 }
307 if (align == LEFT) {
308 waddstr(win, str);
309 add_spaces(win, num);
310 } else if (align == RIGHT) {
311 add_spaces(win, num);
312 waddstr(win, str);
313 } else {
314 add_spaces(win, num / 2);
315 waddstr(win, str[0]? str: "");
316 add_spaces(win, num - num / 2);
317 }
318 free(str);
319 return 1;
320 }
321
322 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
323 {
324 char *msg;
325
326 if (!curses_active)
327 return;
328 wattron(in.win, COLOR_PAIR(color));
329 PARA_VSPRINTF(fmt, msg);
330 wmove(in.win, 0, 0);
331 align_str(in.win, msg, sb.cols, LEFT);
332 free(msg);
333 wrefresh(in.win);
334 }
335
336 /*
337 * update the status bar
338 */
339 static void print_status_bar(void)
340 {
341 if (!curses_active)
342 return;
343 wmove(sb.win, 0, 0);
344 align_str(sb.win, STANDARD_STATUS_BAR, sb.cols, CENTER);
345 wrefresh(sb.win);
346 }
347
348 /*
349 * get the number of the oldest rbe that is (partially) visible. On return,
350 * lines contains the sum of the number of lines of all visable entries. If the
351 * first one is only partially visible, lines is greater than bot.lines.
352 */
353 static int first_visible_rbe(unsigned *lines)
354 {
355 int i;
356 *lines = 0;
357 for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
358 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
359 int rbe_lines;
360 if (!rbe)
361 return i - 1;
362 // fprintf(stderr, "found: %s\n", rbe->msg);
363 rbe_lines = NUM_LINES(rbe->len);
364 if (rbe_lines > bot.lines)
365 return -1;
366 *lines += rbe_lines;
367 if (*lines >= bot.lines)
368 return i;
369 }
370 return RINGBUFFER_SIZE - 1;
371 }
372
373 static int draw_top_rbe(unsigned *lines)
374 {
375 unsigned len;
376 int offset, fvr = first_visible_rbe(lines);
377 struct rb_entry *rbe;
378
379 if (fvr < 0)
380 return -1;
381 wmove(bot.win, 0, 0);
382 rbe = ringbuffer_get(bot_win_rb, fvr);
383 if (!rbe)
384 return -1;
385 /* first rbe might be only partially visible */
386 offset = (*lines - bot.lines) * bot.cols;
387 len = strlen(rbe->msg);
388 if (offset < 0 || len < offset)
389 return -1;
390 wattron(bot.win, COLOR_PAIR(rbe->color));
391 waddstr(bot.win, rbe->msg + offset);
392 *lines = NUM_LINES(len - offset);
393 return fvr;
394 }
395
396 static void redraw_bot_win(void)
397 {
398 unsigned lines;
399 int i;
400
401 wmove(bot.win, 0, 0);
402 wclear(bot.win);
403 i = draw_top_rbe(&lines);
404 if (i <= 0)
405 goto out;
406 while (i > 0 && lines < bot.lines) {
407 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
408 if (!rbe) {
409 lines++;
410 waddstr(bot.win, "\n");
411 continue;
412 }
413 lines += NUM_LINES(rbe->len);
414 wattron(bot.win, COLOR_PAIR(rbe->color));
415 waddstr(bot.win, "\n");
416 waddstr(bot.win, rbe->msg);
417 }
418 out:
419 wrefresh(bot.win);
420 }
421
422 static void rb_add_entry(int color, char *msg)
423 {
424 struct rb_entry *old, *new = para_malloc(sizeof(struct rb_entry));
425 int x, y;
426 new->color = color;
427 new->len = strlen(msg);
428 new->msg = msg;
429 old = ringbuffer_add(bot_win_rb, new);
430 // fprintf(stderr, "added: %s\n", new->msg);
431 if (old) {
432 free(old->msg);
433 free(old);
434 }
435 if (scroll_position) {
436 /* discard current scrolling, like xterm does */
437 scroll_position = 0;
438 redraw_bot_win();
439 return;
440 }
441 wattron(bot.win, COLOR_PAIR(color));
442 getyx(bot.win, y, x);
443 if (y || x)
444 waddstr(bot.win, "\n");
445 waddstr(bot.win, msg);
446 }
447
448 /*
449 * print formated output to bot win and refresh
450 */
451 __printf_2_3 static void outputf(int color, const char* fmt,...)
452 {
453 char *msg;
454
455 if (!curses_active)
456 return;
457 PARA_VSPRINTF(fmt, msg);
458 rb_add_entry(color, msg);
459 wrefresh(bot.win);
460 }
461
462 static void add_output_line(char *line)
463 {
464 if (!curses_active)
465 return;
466 rb_add_entry(COLOR_OUTPUT, para_strdup(line));
467 }
468
469 void para_log(int ll, const char *fmt,...)
470 {
471 int color;
472 char *msg;
473
474 if (ll < conf.loglevel_arg || !curses_active)
475 return;
476 switch (ll) {
477 case DEBUG:
478 case INFO:
479 case NOTICE:
480 color = COLOR_MSG;
481 break;
482 default:
483 color = COLOR_ERRMSG;
484 }
485 PARA_VSPRINTF(fmt, msg);
486 chop(msg);
487 rb_add_entry(color, msg);
488 wrefresh(bot.win);
489 }
490
491 static void setup_signal_handling(void)
492 {
493 signal_pipe = para_signal_init();
494 para_install_sighandler(SIGINT);
495 para_install_sighandler(SIGTERM);
496 para_install_sighandler(SIGCHLD);
497 para_install_sighandler(SIGWINCH);
498 para_install_sighandler(SIGUSR1);
499 signal(SIGPIPE, SIG_IGN);
500 signal(SIGHUP, SIG_IGN);
501 }
502
503 static void do_exit(int ret)
504 {
505 signal(SIGTERM, SIG_IGN);
506 kill(0, SIGTERM);
507 exit(ret);
508 }
509
510 static void shutdown_curses(void)
511 {
512 if (!curses_active)
513 return;
514 def_prog_mode();
515 curses_active = 0;
516 endwin();
517 }
518
519 static void finish(int ret)
520 {
521 shutdown_curses();
522 do_exit(ret);
523 }
524
525 /*
526 * exit curses and print given message to stdout/stderr
527 */
528 __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
529 {
530 va_list argp;
531 FILE *outfd = ret? stderr: stdout;
532
533 shutdown_curses();
534 va_start(argp, fmt);
535 vfprintf(outfd, fmt, argp);
536 va_end(argp);
537 do_exit(ret);
538 }
539
540 static void print_welcome(void)
541 {
542 int ll = conf.loglevel_arg;
543 if (ll > NOTICE)
544 return;
545 outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
546 " \"" CODENAME "\". Theme: %s", theme.name);
547 wclrtoeol(bot.win);
548 }
549
550 /*
551 * init all windows
552 */
553 static void init_wins(int top_lines)
554 {
555 int i;
556
557 top.lines = top_lines;
558 top.cols = COLS;
559 top.begy = 0;
560 top.begx = 0;
561
562 bot.lines = LINES - top.lines - 3;
563 bot.cols = COLS;
564 bot.begy = top.lines + 1;
565 bot.begx = 0;
566
567 sb.lines = 1;
568 sb.cols = COLS;
569 sb.begy = LINES - 2;
570 sb.begx = 0;
571
572 in.lines = 1;
573 in.cols = COLS;
574 in.begy = LINES - 1;
575 in.begx = 0;
576
577 sep.lines = 1;
578 sep.cols = COLS;
579 sep.begy = top.lines;
580 sep.begx = 0;
581
582 assume_default_colors(theme.default_fg, theme.default_bg);
583 if (top.win) {
584 mvwin(top.win, top.begy, top.begx);
585 wresize(top.win, top.lines, top.cols);
586
587 mvwin(sb.win, sb.begy, sb.begx);
588 wresize(sb.win, sb.lines, sb.cols);
589
590 mvwin(sep.win, sep.begy, sep.begx);
591 wresize(sep.win, sep.lines, sep.cols);
592
593 mvwin(bot.win, bot.begy, bot.begx);
594 wresize(bot.win, bot.lines, bot.cols);
595
596 mvwin(in.win, in.begy, in.begx);
597 wresize(in.win, in.lines, in.cols);
598 } else {
599 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
600 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
601 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
602 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
603 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
604 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
605 msg_n_exit(1, "Error: Cannot create curses windows\n");
606 wclear(bot.win);
607 wclear(sb.win);
608 wclear(in.win);
609 scrollok(bot.win, 1);
610 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
611 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
612 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
613 wattron(top.win, COLOR_PAIR(COLOR_TOP));
614 nodelay(top.win, 1);
615 nodelay(bot.win, 1);
616 nodelay(sb.win, 1);
617 nodelay(in.win, 0);
618
619 keypad(top.win, 1);
620 keypad(bot.win, 1);
621 keypad(sb.win, 1);
622 keypad(in.win, 1);
623 print_status_bar();
624 }
625 wmove(sep.win, 0, 0);
626 for (i = 1; i <= COLS; i++)
627 waddstr(sep.win, theme.sep_str);
628 wclear(top.win);
629 //wclear(bot.win);
630 wnoutrefresh(top.win);
631 wnoutrefresh(bot.win);
632 //wnoutrefresh(sb.win);
633 print_status_bar();
634 wnoutrefresh(in.win);
635 wnoutrefresh(sep.win);
636 doupdate();
637 }
638
639 static void check_geometry(void)
640 {
641 if (LINES < theme.lines_min || COLS < theme.cols_min)
642 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
643 " (need at least %dx%d)\n", COLS, LINES,
644 theme.cols_min, theme.lines_min);
645 }
646
647 /*
648 * Print stat item #i to curses window
649 */
650 static void print_stat_item(int i)
651 {
652 char *tmp;
653 struct stat_item_data d = theme.data[i];
654 char *c = stat_content[i];
655
656 if (!curses_active || !d.len || !c)
657 return;
658 tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
659 // PARA_DEBUG_LOG("%s: read: %s\n", __func__, tmp);
660 wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
661 wrefresh(top.win);
662 wattron(top.win, COLOR_PAIR(i + 1));
663 align_str(top.win, tmp, d.len * COLS / 100, d.align);
664 free(tmp);
665 wrefresh(top.win);
666 }
667
668 static void print_all_items(void)
669 {
670 int i;
671
672 if (!curses_active)
673 return;
674 for (i = 0; i < NUM_STAT_ITEMS; i++)
675 print_stat_item(i);
676 }
677 static void clear_all_items(void)
678 {
679 int i;
680
681 for (i = 0; i < NUM_STAT_ITEMS; i++) {
682 free(stat_content[i]);
683 stat_content[i] = para_strdup("");
684 }
685 }
686
687 static void init_colors(void)
688 {
689 int i;
690 if (!has_colors())
691 msg_n_exit(EXIT_FAILURE, "Error: No color term\n");
692 start_color();
693 for (i = 0; i < NUM_STAT_ITEMS; i++)
694 if (theme.data[i].len)
695 init_pair(i + 1, theme.data[i].fg, theme.data[i].bg);
696 init_pair(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
697 init_pair(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
698 init_pair(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
699 init_pair(COLOR_MSG, theme.msg_fg, theme.msg_bg);
700 init_pair(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
701 init_pair(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
702 init_pair(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
703 init_pair(COLOR_TOP, theme.default_fg, theme.default_bg);
704 init_pair(COLOR_BOT, theme.default_fg, theme.default_bg);
705 }
706
707 /*
708 * (re-)initialize the curses library FIXME: Error checking
709 */
710 static void init_curses(void)
711 {
712 curses_active = 1;
713 if (top.win && refresh() == ERR) { /* refesh is really needed */
714 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
715 }
716 check_geometry();
717 curs_set(0); /* make cursor invisible, ignore errors */
718 // if (noraw() == ERR);
719 // msg_n_exit(EXIT_FAILURE, "can not place terminal out of "
720 // "raw mode\n");
721 nonl(); /* tell curses not to do NL->CR/NL on output */
722 noecho(); /* don't echo input */
723 cbreak(); /* take input chars one at a time, no wait for \n */
724 //reset_prog_mode();
725 init_colors();
726 clear();
727 init_wins(theme.top_lines_default);
728 print_all_items();
729 noecho(); /* don't echo input */
730 }
731
732
733 static void check_sigchld(void)
734 {
735 pid_t pid;
736 reap_next_child:
737 pid = para_reap_child();
738 if (pid <= 0)
739 return;
740 if (pid == cmd_pid) {
741 cmd_pid = 0;
742 cmd_died = 1;
743 }
744 goto reap_next_child;
745 }
746
747 /*
748 * print status line if line starts with known command.
749 */
750 static void check_stat_line(char *line)
751 {
752 int i;
753
754 // PARA_INFO_LOG("%s: checking: %s\n", __func__, line);
755 i = stat_line_valid(line);
756 if (i >= 0) {
757 line += strlen(status_item_list[i]) + 1;
758 free(stat_content[i]);
759 stat_content[i] = para_strdup(line);
760 print_stat_item(i);
761 }
762 return;
763 }
764
765 /*
766 * This sucker modifies its first argument. *handler and *arg are
767 * pointers to 0-terminated strings (inside line). Crap.
768 */
769 static int split_key_map(char *line, char **handler, char **arg)
770 {
771 if (!(*handler = strchr(line + 1, ':')))
772 goto err_out;
773 **handler = '\0';
774 (*handler)++;
775 if (!(*arg = strchr(*handler, ':')))
776 goto err_out;
777 **arg = '\0';
778 (*arg)++;
779 return 1;
780 err_out:
781 return 0;
782 }
783
784 static int check_key_map_args(void)
785 {
786 char *s;
787 int i, ret = -1;
788 char *tmp = NULL, *handler, *arg;
789
790 for (i = 0; i < conf.key_map_given; ++i) {
791 s = conf.key_map_arg[i];
792 if (!(*s))
793 goto err_out;
794 free(tmp);
795 tmp = para_strdup(s);
796 if (!split_key_map(tmp, &handler, &arg))
797 goto err_out;
798 if (strlen(handler) != 1)
799 goto err_out;
800 if (*handler != 'x'
801 && *handler != 'd'
802 && *handler != 'i'
803 && *handler != 'p')
804 goto err_out;
805 if (*handler != 'i')
806 continue;
807 if (find_cmd_byname(arg) < 0)
808 goto err_out;
809 }
810 ret = 0;
811 err_out:
812 free(tmp);
813 return ret;
814 }
815
816 /*
817 * React to various signal-related events
818 */
819 static void handle_signal(int sig)
820 {
821 switch (sig) {
822 case SIGTERM:
823 msg_n_exit(EXIT_FAILURE,
824 "only the good die young (caught SIGTERM))\n");
825 return;
826 case SIGWINCH:
827 if (curses_active) {
828 shutdown_curses();
829 init_curses();
830 redraw_bot_win();
831 }
832 return;
833 case SIGINT:
834 PARA_WARNING_LOG("%s", "caught SIGINT, reset");
835 /* Nothing to do. SIGINT killed our child, para_client stat.
836 * This get noticed by do_select which resets everything
837 */
838 return;
839 case SIGUSR1:
840 PARA_NOTICE_LOG("%s", "got SIGUSR1, rereading configuration");
841 com_reread_conf();
842 return;
843 case SIGCHLD:
844 check_sigchld();
845 return;
846 }
847 }
848
849 static int open_audiod_pipe(void)
850 {
851 static int init = 1;
852
853 if (init)
854 init = 0;
855 else
856 sleep(1);
857 return para_open_audiod_pipe(conf.stat_cmd_arg);
858 }
859
860 /*
861 * This is the core select loop. Besides the (internal) signal
862 * pipe, the following other fds are checked according to the mode:
863 *
864 * GETCH_MODE: check stdin, return when key is pressed
865 *
866 * COMMAND_MODE: check command_pipe and stdin. Return when a screen full
867 * of output has been read or when other end has closed command pipe or
868 * when any key is pressed.
869 *
870 * EXTERNAL_MODE: Check only signal pipe. Used when an external command
871 * is running. During that thime curses is disabled. Returns when
872 * cmd_pid == 0.
873 */
874 static int do_select(int mode)
875 {
876 fd_set rfds;
877 int ret;
878 int max_fileno, cp_numread = 1;
879 char command_buf[4096] = "";
880 int cbo = 0; /* command buf offset */
881 struct timeval tv;
882 repeat:
883 tv.tv_sec = conf.timeout_arg / 1000;
884 tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
885 // ret = refresh_status();
886 FD_ZERO(&rfds);
887 max_fileno = 0;
888 /* audiod pipe */
889 if (audiod_pipe < 0)
890 audiod_pipe = open_audiod_pipe();
891 if (audiod_pipe >= 0)
892 para_fd_set(audiod_pipe, &rfds, &max_fileno);
893 /* signal pipe */
894 para_fd_set(signal_pipe, &rfds, &max_fileno);
895 /* command pipe only for COMMAND_MODE */
896 if (command_pipe >= 0 && mode == COMMAND_MODE)
897 para_fd_set(command_pipe, &rfds, &max_fileno);
898 ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
899 if (ret <= 0)
900 goto check_return; /* skip fd checks */
901 /* signals */
902 if (FD_ISSET(signal_pipe, &rfds)) {
903 int sig_nr = para_next_signal();
904 if (sig_nr > 0)
905 handle_signal(sig_nr);
906 }
907 /* read command pipe if ready */
908 if (command_pipe >= 0 && mode == COMMAND_MODE &&
909 FD_ISSET(command_pipe, &rfds)) {
910 cp_numread = read(command_pipe, command_buf + cbo,
911 sizeof(command_buf) - 1 - cbo);
912 if (cp_numread >= 0)
913 cbo += cp_numread;
914 else {
915 if (cp_numread < 0)
916 PARA_ERROR_LOG("read error (%d)", cp_numread);
917 close(command_pipe);
918 command_pipe = -1;
919 }
920 }
921 if (audiod_pipe >= 0 && FD_ISSET(audiod_pipe, &rfds))
922 if (read_audiod_pipe(audiod_pipe, check_stat_line) <= 0) {
923 close(audiod_pipe);
924 audiod_pipe = -1;
925 clear_all_items();
926 free(stat_content[SI_STATUS_BAR]);
927 stat_content[SI_STATUS_BAR] =
928 para_strdup("audiod not running!?");
929 print_all_items();
930 }
931 check_return:
932 switch (mode) {
933 case COMMAND_MODE:
934 if (cp_numread <= 0 && !cbo) /* command complete */
935 return 0;
936 if (cbo)
937 cbo = for_each_line(command_buf, cbo, &add_output_line);
938 if (cp_numread <= 0)
939 cbo = 0;
940 wrefresh(bot.win);
941 ret = wgetch(top.win);
942 if (ret != ERR && ret != KEY_RESIZE) {
943 if (command_pipe) {
944 close(command_pipe);
945 command_pipe = -1;
946 }
947 if (cmd_pid)
948 kill(cmd_pid, SIGTERM);
949 return -1;
950 }
951 break;
952 case GETCH_MODE:
953 ret = wgetch(top.win);
954 if (ret != ERR && ret != KEY_RESIZE)
955 return ret;
956 break;
957 case EXTERNAL_MODE:
958 if (cmd_died) {
959 cmd_died = 0;
960 return 0;
961 }
962 }
963 goto repeat;
964 }
965
966 /*
967 * read from command pipe and print data to bot window
968 */
969 static int send_output(void)
970 {
971 if (command_pipe < 0)
972 return 0;
973 if (do_select(COMMAND_MODE) >= 0)
974 PARA_INFO_LOG("%s", "command complete");
975 else
976 PARA_NOTICE_LOG("%s", "command aborted");
977 print_in_bar(COLOR_MSG, " ");
978 return 1;
979 }
980
981 static int client_cmd_cmdline(char *cmd)
982 {
983 int ret, fds[3] = {0, 1, 0};
984 char *c = make_message(BINDIR "/para_client %s", cmd);
985
986 outputf(COLOR_COMMAND, "%s", c);
987 print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
988 ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
989 free(c);
990 if (ret < 0)
991 return -1;
992 command_pipe = fds[1];
993 mark_fd_nonblock(command_pipe);
994 return send_output();
995 }
996
997 /*
998 * exec command and print output to bot win
999 */
1000 static int display_cmd(char *cmd)
1001 {
1002 int fds[3] = {0, 1, 0};
1003
1004 print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1005 outputf(COLOR_COMMAND, "%s", cmd);
1006 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1007 return -1;
1008 command_pipe = fds[1];
1009 mark_fd_nonblock(command_pipe);
1010 return send_output();
1011 }
1012
1013 /*
1014 * shutdown curses and stat pipe before executing external commands
1015 */
1016 static int external_cmd(char *cmd)
1017 {
1018 int fds[3] = {-1, -1, -1};
1019
1020 if (cmd_pid)
1021 return -1;
1022 shutdown_curses();
1023 para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1024 cmd_died = 0;
1025 do_select(EXTERNAL_MODE);
1026 init_curses();
1027 return 0;
1028 }
1029
1030 static void print_scroll_msg(void)
1031 {
1032 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1033 int first_rbe = first_visible_rbe(&lines_total);
1034 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1035 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1036 }
1037
1038 static void com_page_down(void)
1039 {
1040 unsigned lines = 0;
1041 int i = scroll_position;
1042 while (lines < bot.lines && --i > 0) {
1043 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1044 if (!rbe)
1045 break;
1046 lines += NUM_LINES(strlen(rbe->msg));
1047 }
1048 if (lines) {
1049 scroll_position = i;
1050 redraw_bot_win();
1051 print_scroll_msg();
1052 return;
1053 }
1054 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1055 }
1056
1057 static void com_page_up(void)
1058 {
1059 unsigned lines;
1060 int fvr = first_visible_rbe(&lines);
1061 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1062 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1063 return;
1064 }
1065 scroll_position = fvr + 1;
1066 for (; scroll_position > 0; scroll_position--) {
1067 fvr = first_visible_rbe(&lines);
1068 if (lines == bot.lines)
1069 break;
1070 }
1071 redraw_bot_win();
1072 print_scroll_msg();
1073 }
1074
1075 static void com_scroll_down(void)
1076 {
1077 struct rb_entry *rbe;
1078 int rbe_lines;
1079
1080 if (!scroll_position) {
1081 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1082 return;
1083 }
1084 scroll_position--;
1085 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1086 rbe_lines = NUM_LINES(rbe->len);
1087 wscrl(bot.win, rbe_lines);
1088 wmove(bot.win, bot.lines - rbe_lines, 0);
1089 wattron(bot.win, COLOR_PAIR(rbe->color));
1090 waddstr(bot.win, rbe->msg);
1091 wrefresh(bot.win);
1092 print_scroll_msg();
1093 }
1094
1095 static void com_scroll_up(void)
1096 {
1097 struct rb_entry *rbe = NULL;
1098 unsigned lines;
1099 int i, first_rbe, num_scroll;
1100
1101 /* the entry that is going to vanish */
1102 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1103 if (!rbe)
1104 goto err_out;
1105 num_scroll = NUM_LINES(rbe->len);
1106 first_rbe = first_visible_rbe(&lines);
1107 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1108 goto err_out;
1109 scroll_position++;
1110 wscrl(bot.win, -num_scroll);
1111 i = draw_top_rbe(&lines);
1112 if (i < 0)
1113 goto err_out;
1114 while (i > 0 && lines < num_scroll) {
1115 int rbe_lines;
1116 rbe = ringbuffer_get(bot_win_rb, --i);
1117 if (!rbe)
1118 break;
1119 rbe_lines = NUM_LINES(rbe->len);
1120 lines += rbe_lines;
1121 // fprintf(stderr, "msg: %s\n", rbe->msg);
1122 wattron(bot.win, COLOR_PAIR(rbe->color));
1123 waddstr(bot.win, "\n");
1124 waddstr(bot.win, rbe->msg);
1125 if (!i)
1126 break;
1127 i--;
1128 }
1129 wrefresh(bot.win);
1130 print_scroll_msg();
1131 return;
1132 err_out:
1133 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1134 }
1135
1136 static void com_ll_decr(void)
1137 {
1138 if (conf.loglevel_arg <= DEBUG) {
1139 print_in_bar(COLOR_ERRMSG,
1140 "loglevel already at maximal verbosity\n");
1141 return;
1142 }
1143 conf.loglevel_arg--;
1144 print_in_bar(COLOR_MSG, "loglevel set to %d\n", conf.loglevel_arg);
1145 }
1146
1147 static void com_ll_incr(void)
1148 {
1149 if (conf.loglevel_arg >= EMERG) {
1150 print_in_bar(COLOR_ERRMSG,
1151 "loglevel already at miminal verbosity\n");
1152 return;
1153 }
1154 conf.loglevel_arg++;
1155 print_in_bar(COLOR_MSG, "loglevel set to %d\n", conf.loglevel_arg);
1156 }
1157
1158 /*
1159 * reread configuration, terminate on errors
1160 */
1161 static void com_reread_conf(void)
1162 {
1163 char *cf =configfile_exists();
1164
1165 if (!cf) {
1166 PARA_WARNING_LOG("%s", "there is no configuration to read");
1167 return;
1168 }
1169 PARA_INFO_LOG("%s", "rereading command line options and config file");
1170 gui_cmdline_parser(_argc, _argv, &conf);
1171 gui_cmdline_parser_configfile(cf, &conf, 1, 1, 0);
1172 PARA_NOTICE_LOG("%s", "config file reloaded");
1173 if (check_key_map_args() < 0)
1174 finish(EXIT_FAILURE);
1175 }
1176
1177 static void com_help(void)
1178 {
1179 int i;
1180
1181 for (i = 0; i < conf.key_map_given; ++i) {
1182 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1183 const char *handler_text = "???", *desc = NULL;
1184
1185 if (!split_key_map(tmp, &handler, &arg)) {
1186 free(tmp);
1187 return;
1188 }
1189 switch (*handler) {
1190 case 'i':
1191 handler_text = "internal";
1192 desc = command_list[find_cmd_byname(arg)].description;
1193 break;
1194 case 'x': handler_text = "external"; break;
1195 case 'd': handler_text = "display "; break;
1196 case 'p': handler_text = "para "; break;
1197 }
1198 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1199 strlen(arg) < 8? "\t" : "",
1200 desc? desc : "");
1201 free(tmp);
1202 }
1203 for (i = 0; command_list[i].handler; i++) {
1204 struct gui_command gc = command_list[i];
1205
1206 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1207 strlen(gc.name) < 8? "\t" : "",
1208 gc.description);
1209 }
1210 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1211 "for more info");
1212 }
1213
1214 static void com_shrink_top_win(void)
1215 {
1216 if (top.lines <= theme.top_lines_min) {
1217 PARA_WARNING_LOG("%s", "can not decrease top window");
1218 return;
1219 }
1220 init_wins(top.lines - 1);
1221 wclear(top.win);
1222 print_all_items();
1223 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1224 }
1225
1226 static void com_enlarge_top_win(void)
1227 {
1228 if (bot.lines < 3) {
1229 PARA_WARNING_LOG("%s", "can not increase top window");
1230 return;
1231 }
1232 init_wins(top.lines + 1);
1233 wclear(top.win);
1234 print_all_items();
1235 print_in_bar(COLOR_MSG, "increased top window");
1236 }
1237
1238 static void com_version(void)
1239 {
1240 print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1241 CODENAME "\"");
1242 }
1243
1244 static void com_quit(void)
1245 {
1246 finish(0);
1247 }
1248
1249 static void com_refresh(void)
1250 {
1251 shutdown_curses();
1252 init_curses();
1253 }
1254
1255 static void change_theme(int next)
1256 {
1257 if (next)
1258 next_theme(&theme);
1259 else
1260 prev_theme(&theme);
1261 /* This seems to be needed twice, why? */
1262 com_refresh();
1263 com_refresh();
1264 PARA_NOTICE_LOG("new theme: %s", theme.name);
1265 }
1266
1267 static void com_next_theme(void)
1268 {
1269 change_theme(1);
1270 }
1271
1272 static void com_prev_theme(void)
1273 {
1274 change_theme(0);
1275 }
1276
1277
1278 static void handle_command(int c)
1279 {
1280 int i;
1281
1282 /* first check user's key bindings */
1283 for (i = 0; i < conf.key_map_given; ++i) {
1284 char tmp[MAXLINE], *handler, *arg;
1285
1286 strcpy(tmp, conf.key_map_arg[i]);
1287 if (!split_key_map(tmp, &handler, &arg))
1288 return;
1289 if (!strcmp(tmp, km_keyname(c))) {
1290 if (*handler == 'd') {
1291 display_cmd(arg);
1292 return;
1293 }
1294 if (*handler == 'x') {
1295 external_cmd(arg);
1296 return;
1297 }
1298 if (*handler == 'p') {
1299 client_cmd_cmdline(arg);
1300 return;
1301 }
1302 if (*handler == 'i') {
1303 int num = find_cmd_byname(arg);
1304 if (num >= 0)
1305 command_list[num].handler();
1306 return;
1307 }
1308 }
1309 }
1310 /* not found, check internal key bindings */
1311 for (i = 0; command_list[i].handler; i++) {
1312 if (!strcmp(km_keyname(c), command_list[i].key)) {
1313 command_list[i].handler();
1314 return;
1315 }
1316 }
1317 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1318 km_keyname(c));
1319 }
1320
1321 int main(int argc, char *argv[])
1322 {
1323 int ret;
1324 char *cf;
1325
1326 _argc = argc;
1327 _argv = argv;
1328
1329 if (gui_cmdline_parser(argc, argv, &conf)) {
1330 fprintf(stderr, "parse error while reading command line\n");
1331 exit(EXIT_FAILURE);
1332 }
1333 HANDLE_VERSION_FLAG("gui", conf);
1334 init_theme(0, &theme);
1335 top.lines = theme.top_lines_default;
1336 if (check_key_map_args() < 0) {
1337 fprintf(stderr, "invalid key map\n");
1338 exit(EXIT_FAILURE);
1339 }
1340 cf = configfile_exists();
1341 if (!cf && conf.config_file_given) {
1342 fprintf(stderr, "can not read config file %s\n",
1343 conf.config_file_arg);
1344 exit(EXIT_FAILURE);
1345 }
1346 if (cf)
1347 gui_cmdline_parser_configfile(cf, &conf, 0, 0, 0);
1348 if (check_key_map_args() < 0) {
1349 fprintf(stderr, "invalid key map in config file\n");
1350 exit(EXIT_FAILURE);
1351 }
1352 setup_signal_handling();
1353 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1354 initscr(); /* needed only once, always successful */
1355 init_curses();
1356 print_welcome();
1357 for (;;) {
1358 print_status_bar();
1359 ret = do_select(GETCH_MODE);
1360 if (!ret)
1361 continue;
1362 print_in_bar(COLOR_MSG, " ");
1363 handle_command(ret);
1364 }
1365 }