Kill superfluous "%s" in log messages.
[paraslash.git] / gui.c
1 /*
2 * Copyright (C) 1998-2008 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file gui.c Curses-based interface for paraslash. */
8
9 #include <signal.h>
10 #include <sys/types.h>
11 #include <dirent.h>
12 #include "gui.cmdline.h"
13 #include "para.h"
14 #include "gui.h"
15 #include "string.h"
16 #include <curses.h>
17 #include "ringbuffer.h"
18 #include "fd.h"
19 #include "error.h"
20 #include "list.h"
21 #include "sched.h"
22 #include "signal.h"
23
24 /** define the array of error lists needed by para_gui */
25 INIT_GUI_ERRLISTS;
26 static char *stat_content[NUM_STAT_ITEMS];
27
28 #define STANDARD_STATUS_BAR "para_gui " PACKAGE_VERSION " (hit ? for help)"
29
30 static int signal_pipe;
31
32 static struct win_data {
33 WINDOW *win;
34 NCURSES_SIZE_T begx;
35 NCURSES_SIZE_T begy;
36 NCURSES_SIZE_T cols;
37 NCURSES_SIZE_T lines;
38 } top, bot, sb, in, sep;
39
40 #define RINGBUFFER_SIZE 512
41 struct rb_entry {
42 char *msg;
43 size_t len;
44 int color;
45 };
46 struct ringbuffer *bot_win_rb;
47 #define NUM_LINES(len) (1 + (len) / bot.cols)
48
49 static unsigned scroll_position;
50
51 static int cmd_died, curses_active;
52 static pid_t cmd_pid;
53
54 static int command_pipe = -1;
55 static int audiod_pipe = -1;
56 static struct gui_args_info conf;
57
58 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
59
60
61 #define COLOR_STATUSBAR 52
62 #define COLOR_COMMAND 53
63 #define COLOR_OUTPUT 54
64 #define COLOR_MSG 55
65 #define COLOR_ERRMSG 56
66 #define COLOR_WELCOME 57
67 #define COLOR_SEPARATOR 58
68 #define COLOR_TOP 59
69 #define COLOR_BOT 60
70
71 struct gui_command {
72 const char *key;
73 const char *name;
74 const char *description;
75 void (*handler)(void);
76 };
77
78 struct stat_item {
79 char name[MAXLINE];
80 char prefix[MAXLINE];
81 char postfix[MAXLINE];
82 unsigned y;
83 unsigned x;
84 unsigned len;
85 int fg, bg;
86 int align;
87 char content[MAXLINE];
88 };
89
90 static struct gui_theme theme;
91
92 int _argc;
93 char **_argv;
94
95 static void com_help(void);
96 static void com_reread_conf(void);
97 static void com_enlarge_top_win(void);
98 static void com_shrink_top_win(void);
99 static void com_version(void);
100 static void com_quit(void);
101 static void com_refresh(void);
102 static void com_ll_incr(void);
103 static void com_ll_decr(void);
104 static void com_prev_theme(void);
105 static void com_next_theme(void);
106 static void com_scroll_up(void);
107 static void com_scroll_down(void);
108 static void com_page_up(void);
109 static void com_page_down(void);
110
111 struct gui_command command_list[] = {
112 {
113 .key = "?",
114 .name = "help",
115 .description = "print help",
116 .handler = com_help
117 }, {
118 .key = "+",
119 .name = "enlarge_win",
120 .description = "enlarge the top window",
121 .handler = com_enlarge_top_win
122 }, {
123 .key = "-",
124 .name = "shrink_win",
125 .description = "shrink the top window",
126 .handler = com_shrink_top_win
127 }, {
128 .key = "r",
129 .name = "reread_conf",
130 .description = "reread configuration file",
131 .handler = com_reread_conf
132 }, {
133 .key = "q",
134 .name = "quit",
135 .description = "exit para_gui",
136 .handler = com_quit
137 }, {
138 .key = "^L",
139 .name = "refresh",
140 .description = "redraw the screen",
141 .handler = com_refresh
142 }, {
143 .key = ".",
144 .name = "next_theme",
145 .description = "switch to next theme",
146 .handler = com_next_theme
147 }, {
148 .key = ",",
149 .name = "prev_theme",
150 .description = "switch to previous stream",
151 .handler = com_prev_theme
152 }, {
153 .key = ">",
154 .name = "ll_incr",
155 .description = "increase loglevel (decreases verbosity)",
156 .handler = com_ll_incr
157 }, {
158 .key = "<",
159 .name = "ll_decr",
160 .description = "decrease loglevel (increases verbosity)",
161 .handler = com_ll_decr
162 }, {
163 .key = "V",
164 .name = "version",
165 .description = "show the para_gui version",
166 .handler = com_version
167 }, {
168 .key = "<up>",
169 .name = "scroll_up",
170 .description = "scroll up one line",
171 .handler = com_scroll_up
172 }, {
173 .key = "<down>",
174 .name = "scroll_down",
175 .description = "scroll down one line",
176 .handler = com_scroll_down
177 }, {
178 .key = "<ppage>",
179 .name = "page_up",
180 .description = "scroll up one page",
181 .handler = com_page_up
182 }, {
183 .key = "<npage>",
184 .name = "page_down",
185 .description = "scroll down one page",
186 .handler = com_page_down
187 }, {
188 .handler = NULL
189 }
190 };
191
192 static int para_open_audiod_pipe(char *cmd)
193 {
194 int fds[3] = {0, 1, 0};
195 pid_t pid;
196 int ret = para_exec_cmdline_pid(&pid, cmd, fds);
197 if (ret < 0)
198 return ret;
199 ret = mark_fd_nonblocking(fds[1]);
200 if (ret > 0)
201 return fds[1];
202 close(fds[1]);
203 return ret;
204 }
205
206 static int read_audiod_pipe(int fd, line_handler_t *line_handler)
207 {
208 static char buf[4096];
209 const ssize_t bufsize = sizeof(buf) - 1;
210 static ssize_t loaded;
211 ssize_t ret;
212
213 if (loaded >= bufsize)
214 loaded = 0;
215 ret = read(fd, buf + loaded, bufsize - loaded);
216 if (ret > 0) {
217 loaded += ret;
218 buf[loaded] = '\0';
219 loaded = for_each_line(buf, loaded, line_handler, NULL);
220 }
221 return ret;
222 }
223
224 static int find_cmd_byname(char *name)
225 {
226 int i;
227
228 for (i = 0; command_list[i].handler; i++)
229 if (!strcmp(command_list[i].name, name))
230 return i;
231 return -1;
232 }
233
234 /* taken from mutt */
235 static char *km_keyname(int c)
236 {
237 static char buf[10];
238
239 if (c == KEY_UP) {
240 sprintf(buf, "<up>");
241 return buf;
242 }
243 if (c == KEY_DOWN) {
244 sprintf(buf, "<down>");
245 return buf;
246 }
247 if (c == KEY_LEFT) {
248 sprintf(buf, "<left>");
249 return buf;
250 }
251 if (c == KEY_RIGHT) {
252 sprintf(buf, "<right>");
253 return buf;
254 }
255 if (c == KEY_NPAGE) {
256 sprintf(buf, "<npage>");
257 return buf;
258 }
259 if (c == KEY_PPAGE) {
260 sprintf(buf, "<ppage>");
261 return buf;
262 }
263 if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
264 if (c < 0)
265 c += 256;
266 if (c < 128) {
267 buf[0] = '^';
268 buf[1] = (c + '@') & 0x7f;
269 buf[2] = 0;
270 } else
271 snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
272 (c >> 3) & 7, c & 7);
273 } else if (c >= KEY_F0 && c < KEY_F(256))
274 sprintf(buf, "<F%d>", c - KEY_F0);
275 else if (isprint(c))
276 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
277 else
278 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
279 return buf;
280 }
281
282 static char *configfile_exists(void)
283 {
284 static char *config_file;
285 char *tmp;
286
287 if (!conf.config_file_given) {
288 if (!config_file) {
289 char *home = para_homedir();
290 config_file = make_message("%s/.paraslash/gui.conf",
291 home);
292 free(home);
293 }
294 tmp = config_file;
295 } else
296 tmp = conf.config_file_arg;
297 return file_exists(tmp)? tmp: NULL;
298 }
299
300 /*
301 * print num spaces to curses window
302 */
303 static void add_spaces(WINDOW* win, unsigned int num)
304 {
305 while (num > 0) {
306 num--;
307 waddstr(win, " ");
308 }
309 }
310
311 /*
312 * print aligned string to curses window. This function always prints
313 * exactly len chars.
314 */
315 static int align_str(WINDOW* win, const char *string, unsigned int len,
316 unsigned int align)
317 {
318 int num; /* of spaces */
319 char *str;
320
321 if (!win || !string)
322 return -1;
323 num = len - strlen(string);
324 str = para_strdup(string);
325 if (num < 0) {
326 str[len] = '\0';
327 num = 0;
328 }
329 if (align == LEFT) {
330 waddstr(win, str);
331 add_spaces(win, num);
332 } else if (align == RIGHT) {
333 add_spaces(win, num);
334 waddstr(win, str);
335 } else {
336 add_spaces(win, num / 2);
337 waddstr(win, str[0]? str: "");
338 add_spaces(win, num - num / 2);
339 }
340 free(str);
341 return 1;
342 }
343
344 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
345 {
346 char *msg;
347
348 if (!curses_active)
349 return;
350 wattron(in.win, COLOR_PAIR(color));
351 PARA_VSPRINTF(fmt, msg);
352 wmove(in.win, 0, 0);
353 align_str(in.win, msg, sb.cols, LEFT);
354 free(msg);
355 wrefresh(in.win);
356 }
357
358 /*
359 * update the status bar
360 */
361 static void print_status_bar(void)
362 {
363 if (!curses_active)
364 return;
365 wmove(sb.win, 0, 0);
366 align_str(sb.win, STANDARD_STATUS_BAR, sb.cols, CENTER);
367 wrefresh(sb.win);
368 }
369
370 /*
371 * get the number of the oldest rbe that is (partially) visible. On return,
372 * lines contains the sum of the number of lines of all visable entries. If the
373 * first one is only partially visible, lines is greater than bot.lines.
374 */
375 static int first_visible_rbe(unsigned *lines)
376 {
377 int i;
378 *lines = 0;
379 for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
380 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
381 int rbe_lines;
382 if (!rbe)
383 return i - 1;
384 // fprintf(stderr, "found: %s\n", rbe->msg);
385 rbe_lines = NUM_LINES(rbe->len);
386 if (rbe_lines > bot.lines)
387 return -1;
388 *lines += rbe_lines;
389 if (*lines >= bot.lines)
390 return i;
391 }
392 return RINGBUFFER_SIZE - 1;
393 }
394
395 static int draw_top_rbe(unsigned *lines)
396 {
397 unsigned len;
398 int offset, fvr = first_visible_rbe(lines);
399 struct rb_entry *rbe;
400
401 if (fvr < 0)
402 return -1;
403 wmove(bot.win, 0, 0);
404 rbe = ringbuffer_get(bot_win_rb, fvr);
405 if (!rbe)
406 return -1;
407 /* first rbe might be only partially visible */
408 offset = (*lines - bot.lines) * bot.cols;
409 len = strlen(rbe->msg);
410 if (offset < 0 || len < offset)
411 return -1;
412 wattron(bot.win, COLOR_PAIR(rbe->color));
413 waddstr(bot.win, rbe->msg + offset);
414 *lines = NUM_LINES(len - offset);
415 return fvr;
416 }
417
418 static void redraw_bot_win(void)
419 {
420 unsigned lines;
421 int i;
422
423 wmove(bot.win, 0, 0);
424 wclear(bot.win);
425 i = draw_top_rbe(&lines);
426 if (i <= 0)
427 goto out;
428 while (i > 0 && lines < bot.lines) {
429 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
430 if (!rbe) {
431 lines++;
432 waddstr(bot.win, "\n");
433 continue;
434 }
435 lines += NUM_LINES(rbe->len);
436 wattron(bot.win, COLOR_PAIR(rbe->color));
437 waddstr(bot.win, "\n");
438 waddstr(bot.win, rbe->msg);
439 }
440 out:
441 wrefresh(bot.win);
442 }
443
444 static void rb_add_entry(int color, char *msg)
445 {
446 struct rb_entry *old, *new = para_malloc(sizeof(struct rb_entry));
447 int x, y;
448 new->color = color;
449 new->len = strlen(msg);
450 new->msg = msg;
451 old = ringbuffer_add(bot_win_rb, new);
452 // fprintf(stderr, "added: %s\n", new->msg);
453 if (old) {
454 free(old->msg);
455 free(old);
456 }
457 if (scroll_position) {
458 /* discard current scrolling, like xterm does */
459 scroll_position = 0;
460 redraw_bot_win();
461 return;
462 }
463 wattron(bot.win, COLOR_PAIR(color));
464 getyx(bot.win, y, x);
465 if (y || x)
466 waddstr(bot.win, "\n");
467 waddstr(bot.win, msg);
468 }
469
470 /*
471 * print formated output to bot win and refresh
472 */
473 __printf_2_3 static void outputf(int color, const char* fmt,...)
474 {
475 char *msg;
476
477 if (!curses_active)
478 return;
479 PARA_VSPRINTF(fmt, msg);
480 rb_add_entry(color, msg);
481 wrefresh(bot.win);
482 }
483
484 static int add_output_line(char *line, __a_unused void *data)
485 {
486 if (!curses_active)
487 return 1;
488 rb_add_entry(COLOR_OUTPUT, para_strdup(line));
489 return 1;
490 }
491
492 void para_log(int ll, const char *fmt,...)
493 {
494 int color;
495 char *msg;
496
497 if (ll < conf.loglevel_arg || !curses_active)
498 return;
499 switch (ll) {
500 case DEBUG:
501 case INFO:
502 case NOTICE:
503 color = COLOR_MSG;
504 break;
505 default:
506 color = COLOR_ERRMSG;
507 }
508 PARA_VSPRINTF(fmt, msg);
509 chop(msg);
510 rb_add_entry(color, msg);
511 wrefresh(bot.win);
512 }
513
514 static void setup_signal_handling(void)
515 {
516 signal_pipe = para_signal_init();
517 para_install_sighandler(SIGINT);
518 para_install_sighandler(SIGTERM);
519 para_install_sighandler(SIGCHLD);
520 para_install_sighandler(SIGWINCH);
521 para_install_sighandler(SIGUSR1);
522 // signal(SIGPIPE, SIG_IGN);
523 signal(SIGHUP, SIG_IGN);
524 }
525
526 static void do_exit(int ret)
527 {
528 signal(SIGTERM, SIG_IGN);
529 kill(0, SIGTERM);
530 exit(ret);
531 }
532
533 static void shutdown_curses(void)
534 {
535 if (!curses_active)
536 return;
537 def_prog_mode();
538 curses_active = 0;
539 endwin();
540 }
541
542 static void finish(int ret)
543 {
544 shutdown_curses();
545 do_exit(ret);
546 }
547
548 /*
549 * exit curses and print given message to stdout/stderr
550 */
551 __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
552 {
553 va_list argp;
554 FILE *outfd = ret? stderr: stdout;
555
556 shutdown_curses();
557 va_start(argp, fmt);
558 vfprintf(outfd, fmt, argp);
559 va_end(argp);
560 do_exit(ret);
561 }
562
563 static void print_welcome(void)
564 {
565 int ll = conf.loglevel_arg;
566 if (ll > NOTICE)
567 return;
568 outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
569 " \"" CODENAME "\". Theme: %s", theme.name);
570 wclrtoeol(bot.win);
571 }
572
573 /*
574 * init all windows
575 */
576 static void init_wins(int top_lines)
577 {
578 int i;
579
580 top.lines = top_lines;
581 top.cols = COLS;
582 top.begy = 0;
583 top.begx = 0;
584
585 bot.lines = LINES - top.lines - 3;
586 bot.cols = COLS;
587 bot.begy = top.lines + 1;
588 bot.begx = 0;
589
590 sb.lines = 1;
591 sb.cols = COLS;
592 sb.begy = LINES - 2;
593 sb.begx = 0;
594
595 in.lines = 1;
596 in.cols = COLS;
597 in.begy = LINES - 1;
598 in.begx = 0;
599
600 sep.lines = 1;
601 sep.cols = COLS;
602 sep.begy = top.lines;
603 sep.begx = 0;
604
605 assume_default_colors(theme.default_fg, theme.default_bg);
606 if (top.win) {
607 mvwin(top.win, top.begy, top.begx);
608 wresize(top.win, top.lines, top.cols);
609
610 mvwin(sb.win, sb.begy, sb.begx);
611 wresize(sb.win, sb.lines, sb.cols);
612
613 mvwin(sep.win, sep.begy, sep.begx);
614 wresize(sep.win, sep.lines, sep.cols);
615
616 mvwin(bot.win, bot.begy, bot.begx);
617 wresize(bot.win, bot.lines, bot.cols);
618
619 mvwin(in.win, in.begy, in.begx);
620 wresize(in.win, in.lines, in.cols);
621 } else {
622 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
623 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
624 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
625 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
626 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
627 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
628 msg_n_exit(1, "Error: Cannot create curses windows\n");
629 wclear(bot.win);
630 wclear(sb.win);
631 wclear(in.win);
632 scrollok(bot.win, 1);
633 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
634 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
635 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
636 wattron(top.win, COLOR_PAIR(COLOR_TOP));
637 nodelay(top.win, 1);
638 nodelay(bot.win, 1);
639 nodelay(sb.win, 1);
640 nodelay(in.win, 0);
641
642 keypad(top.win, 1);
643 keypad(bot.win, 1);
644 keypad(sb.win, 1);
645 keypad(in.win, 1);
646 print_status_bar();
647 }
648 wmove(sep.win, 0, 0);
649 for (i = 1; i <= COLS; i++)
650 waddstr(sep.win, theme.sep_str);
651 wclear(top.win);
652 //wclear(bot.win);
653 wnoutrefresh(top.win);
654 wnoutrefresh(bot.win);
655 //wnoutrefresh(sb.win);
656 print_status_bar();
657 wnoutrefresh(in.win);
658 wnoutrefresh(sep.win);
659 doupdate();
660 }
661
662 static void check_geometry(void)
663 {
664 if (LINES < theme.lines_min || COLS < theme.cols_min)
665 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
666 " (need at least %dx%d)\n", COLS, LINES,
667 theme.cols_min, theme.lines_min);
668 }
669
670 /*
671 * Print stat item #i to curses window
672 */
673 static void print_stat_item(int i)
674 {
675 char *tmp;
676 struct stat_item_data d = theme.data[i];
677 char *c = stat_content[i];
678
679 if (!curses_active || !d.len || !c)
680 return;
681 tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
682 wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
683 wrefresh(top.win);
684 wattron(top.win, COLOR_PAIR(i + 1));
685 align_str(top.win, tmp, d.len * COLS / 100, d.align);
686 free(tmp);
687 wrefresh(top.win);
688 }
689
690 static void print_all_items(void)
691 {
692 int i;
693
694 if (!curses_active)
695 return;
696 FOR_EACH_STATUS_ITEM(i)
697 print_stat_item(i);
698 }
699
700 static void clear_all_items(void)
701 {
702 int i;
703
704 FOR_EACH_STATUS_ITEM(i) {
705 free(stat_content[i]);
706 stat_content[i] = para_strdup("");
707 }
708 }
709
710 static void init_colors(void)
711 {
712 int i;
713
714 if (!has_colors())
715 msg_n_exit(EXIT_FAILURE, "Error: No color term\n");
716 start_color();
717 FOR_EACH_STATUS_ITEM(i)
718 if (theme.data[i].len)
719 init_pair(i + 1, theme.data[i].fg, theme.data[i].bg);
720 init_pair(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
721 init_pair(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
722 init_pair(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
723 init_pair(COLOR_MSG, theme.msg_fg, theme.msg_bg);
724 init_pair(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
725 init_pair(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
726 init_pair(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
727 init_pair(COLOR_TOP, theme.default_fg, theme.default_bg);
728 init_pair(COLOR_BOT, theme.default_fg, theme.default_bg);
729 }
730
731 /*
732 * (re-)initialize the curses library FIXME: Error checking
733 */
734 static void init_curses(void)
735 {
736 curses_active = 1;
737 if (top.win && refresh() == ERR) { /* refesh is really needed */
738 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
739 }
740 check_geometry();
741 curs_set(0); /* make cursor invisible, ignore errors */
742 // if (noraw() == ERR);
743 // msg_n_exit(EXIT_FAILURE, "can not place terminal out of "
744 // "raw mode\n");
745 nonl(); /* tell curses not to do NL->CR/NL on output */
746 noecho(); /* don't echo input */
747 cbreak(); /* take input chars one at a time, no wait for \n */
748 //reset_prog_mode();
749 init_colors();
750 clear();
751 init_wins(theme.top_lines_default);
752 print_all_items();
753 noecho(); /* don't echo input */
754 }
755
756
757 static void check_sigchld(void)
758 {
759 int ret;
760 pid_t pid;
761 reap_next_child:
762 ret = para_reap_child(&pid);
763 if (ret <= 0)
764 return;
765 if (pid == cmd_pid) {
766 cmd_pid = 0;
767 cmd_died = 1;
768 }
769 goto reap_next_child;
770 }
771
772 /*
773 * print status line if line starts with known command.
774 */
775 static int check_stat_line(char *line, __a_unused void *data)
776 {
777 int i;
778
779 // PARA_INFO_LOG("%s: checking: %s\n", __func__, line);
780 i = stat_line_valid(line);
781 if (i >= 0) {
782 line += strlen(status_item_list[i]) + 1;
783 if (*line == ' ')
784 line++;
785 free(stat_content[i]);
786 stat_content[i] = para_strdup(line);
787 print_stat_item(i);
788 }
789 return 1;
790 }
791
792 /*
793 * This sucker modifies its first argument. *handler and *arg are
794 * pointers to 0-terminated strings (inside line). Crap.
795 */
796 static int split_key_map(char *line, char **handler, char **arg)
797 {
798 if (!(*handler = strchr(line + 1, ':')))
799 goto err_out;
800 **handler = '\0';
801 (*handler)++;
802 if (!(*arg = strchr(*handler, ':')))
803 goto err_out;
804 **arg = '\0';
805 (*arg)++;
806 return 1;
807 err_out:
808 return 0;
809 }
810
811 static int check_key_map_args(void)
812 {
813 char *s;
814 int i, ret = -1;
815 char *tmp = NULL, *handler, *arg;
816
817 for (i = 0; i < conf.key_map_given; ++i) {
818 s = conf.key_map_arg[i];
819 if (!(*s))
820 goto err_out;
821 free(tmp);
822 tmp = para_strdup(s);
823 if (!split_key_map(tmp, &handler, &arg))
824 goto err_out;
825 if (strlen(handler) != 1)
826 goto err_out;
827 if (*handler != 'x'
828 && *handler != 'd'
829 && *handler != 'i'
830 && *handler != 'p')
831 goto err_out;
832 if (*handler != 'i')
833 continue;
834 if (find_cmd_byname(arg) < 0)
835 goto err_out;
836 }
837 ret = 0;
838 err_out:
839 free(tmp);
840 return ret;
841 }
842
843 /*
844 * React to various signal-related events
845 */
846 static void handle_signal(int sig)
847 {
848 switch (sig) {
849 case SIGTERM:
850 msg_n_exit(EXIT_FAILURE,
851 "only the good die young (caught SIGTERM))\n");
852 return;
853 case SIGWINCH:
854 if (curses_active) {
855 shutdown_curses();
856 init_curses();
857 redraw_bot_win();
858 }
859 return;
860 case SIGINT:
861 PARA_WARNING_LOG("caught SIGINT, reset");
862 /* Nothing to do. SIGINT killed our child, para_client stat.
863 * This get noticed by do_select which resets everything
864 */
865 return;
866 case SIGUSR1:
867 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
868 com_reread_conf();
869 return;
870 case SIGCHLD:
871 check_sigchld();
872 return;
873 }
874 }
875
876 static int open_audiod_pipe(void)
877 {
878 static int init = 1;
879
880 if (init)
881 init = 0;
882 else
883 sleep(1);
884 return para_open_audiod_pipe(conf.stat_cmd_arg);
885 }
886
887 /*
888 * This is the core select loop. Besides the (internal) signal
889 * pipe, the following other fds are checked according to the mode:
890 *
891 * GETCH_MODE: check stdin, return when key is pressed
892 *
893 * COMMAND_MODE: check command_pipe and stdin. Return when a screen full
894 * of output has been read or when other end has closed command pipe or
895 * when any key is pressed.
896 *
897 * EXTERNAL_MODE: Check only signal pipe. Used when an external command
898 * is running. During that thime curses is disabled. Returns when
899 * cmd_pid == 0.
900 */
901 static int do_select(int mode)
902 {
903 fd_set rfds;
904 int ret;
905 int max_fileno, cp_numread = 1;
906 char command_buf[4096] = "";
907 int cbo = 0; /* command buf offset */
908 struct timeval tv;
909 repeat:
910 tv.tv_sec = conf.timeout_arg / 1000;
911 tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
912 // ret = refresh_status();
913 FD_ZERO(&rfds);
914 max_fileno = 0;
915 /* audiod pipe */
916 if (audiod_pipe < 0)
917 audiod_pipe = open_audiod_pipe();
918 if (audiod_pipe >= 0)
919 para_fd_set(audiod_pipe, &rfds, &max_fileno);
920 /* signal pipe */
921 para_fd_set(signal_pipe, &rfds, &max_fileno);
922 /* command pipe only for COMMAND_MODE */
923 if (command_pipe >= 0 && mode == COMMAND_MODE)
924 para_fd_set(command_pipe, &rfds, &max_fileno);
925 ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
926 if (ret <= 0)
927 goto check_return; /* skip fd checks */
928 /* signals */
929 if (FD_ISSET(signal_pipe, &rfds)) {
930 int sig_nr = para_next_signal();
931 if (sig_nr > 0)
932 handle_signal(sig_nr);
933 }
934 /* read command pipe if ready */
935 if (command_pipe >= 0 && mode == COMMAND_MODE &&
936 FD_ISSET(command_pipe, &rfds)) {
937 cp_numread = read(command_pipe, command_buf + cbo,
938 sizeof(command_buf) - 1 - cbo);
939 if (cp_numread >= 0)
940 cbo += cp_numread;
941 else {
942 if (cp_numread < 0)
943 PARA_ERROR_LOG("read error (%d)", cp_numread);
944 close(command_pipe);
945 command_pipe = -1;
946 }
947 }
948 if (audiod_pipe >= 0 && FD_ISSET(audiod_pipe, &rfds))
949 if (read_audiod_pipe(audiod_pipe, check_stat_line) <= 0) {
950 close(audiod_pipe);
951 audiod_pipe = -1;
952 clear_all_items();
953 free(stat_content[SI_BASENAME]);
954 stat_content[SI_BASENAME] =
955 para_strdup("audiod not running!?");
956 print_all_items();
957 }
958 check_return:
959 switch (mode) {
960 case COMMAND_MODE:
961 if (cp_numread <= 0 && !cbo) /* command complete */
962 return 0;
963 if (cbo)
964 cbo = for_each_line(command_buf, cbo,
965 &add_output_line, NULL);
966 if (cp_numread <= 0)
967 cbo = 0;
968 wrefresh(bot.win);
969 ret = wgetch(top.win);
970 if (ret != ERR && ret != KEY_RESIZE) {
971 if (command_pipe) {
972 close(command_pipe);
973 command_pipe = -1;
974 }
975 if (cmd_pid)
976 kill(cmd_pid, SIGTERM);
977 return -1;
978 }
979 break;
980 case GETCH_MODE:
981 ret = wgetch(top.win);
982 if (ret != ERR && ret != KEY_RESIZE)
983 return ret;
984 break;
985 case EXTERNAL_MODE:
986 if (cmd_died) {
987 cmd_died = 0;
988 return 0;
989 }
990 }
991 goto repeat;
992 }
993
994 /*
995 * read from command pipe and print data to bot window
996 */
997 static int send_output(void)
998 {
999 int ret;
1000
1001 if (command_pipe < 0)
1002 return 0;
1003 ret = mark_fd_nonblocking(command_pipe);
1004 if (ret < 0) {
1005 close(command_pipe);
1006 return ret;
1007 }
1008 if (do_select(COMMAND_MODE) >= 0)
1009 PARA_INFO_LOG("command complete");
1010 else
1011 PARA_NOTICE_LOG("command aborted");
1012 print_in_bar(COLOR_MSG, " ");
1013 return 1;
1014 }
1015
1016 static int client_cmd_cmdline(char *cmd)
1017 {
1018 int ret, fds[3] = {0, 1, 0};
1019 char *c = make_message(BINDIR "/para_client -- %s", cmd);
1020
1021 outputf(COLOR_COMMAND, "%s", c);
1022 print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1023 ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1024 free(c);
1025 if (ret < 0)
1026 return -1;
1027 command_pipe = fds[1];
1028 return send_output();
1029 }
1030
1031 /*
1032 * exec command and print output to bot win
1033 */
1034 static int display_cmd(char *cmd)
1035 {
1036 int fds[3] = {0, 1, 0};
1037
1038 print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1039 outputf(COLOR_COMMAND, "%s", cmd);
1040 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1041 return -1;
1042 command_pipe = fds[1];
1043 return send_output();
1044 }
1045
1046 /*
1047 * shutdown curses and stat pipe before executing external commands
1048 */
1049 static int external_cmd(char *cmd)
1050 {
1051 int fds[3] = {-1, -1, -1};
1052
1053 if (cmd_pid)
1054 return -1;
1055 shutdown_curses();
1056 para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1057 cmd_died = 0;
1058 do_select(EXTERNAL_MODE);
1059 init_curses();
1060 return 0;
1061 }
1062
1063 static void print_scroll_msg(void)
1064 {
1065 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1066 int first_rbe = first_visible_rbe(&lines_total);
1067 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1068 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1069 }
1070
1071 static void com_page_down(void)
1072 {
1073 unsigned lines = 0;
1074 int i = scroll_position;
1075 while (lines < bot.lines && --i > 0) {
1076 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1077 if (!rbe)
1078 break;
1079 lines += NUM_LINES(strlen(rbe->msg));
1080 }
1081 if (lines) {
1082 scroll_position = i;
1083 redraw_bot_win();
1084 print_scroll_msg();
1085 return;
1086 }
1087 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1088 }
1089
1090 static void com_page_up(void)
1091 {
1092 unsigned lines;
1093 int fvr = first_visible_rbe(&lines);
1094 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1095 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1096 return;
1097 }
1098 scroll_position = fvr + 1;
1099 for (; scroll_position > 0; scroll_position--) {
1100 fvr = first_visible_rbe(&lines);
1101 if (lines == bot.lines)
1102 break;
1103 }
1104 redraw_bot_win();
1105 print_scroll_msg();
1106 }
1107
1108 static void com_scroll_down(void)
1109 {
1110 struct rb_entry *rbe;
1111 int rbe_lines;
1112
1113 if (!scroll_position) {
1114 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1115 return;
1116 }
1117 scroll_position--;
1118 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1119 rbe_lines = NUM_LINES(rbe->len);
1120 wscrl(bot.win, rbe_lines);
1121 wmove(bot.win, bot.lines - rbe_lines, 0);
1122 wattron(bot.win, COLOR_PAIR(rbe->color));
1123 waddstr(bot.win, rbe->msg);
1124 wrefresh(bot.win);
1125 print_scroll_msg();
1126 }
1127
1128 static void com_scroll_up(void)
1129 {
1130 struct rb_entry *rbe = NULL;
1131 unsigned lines;
1132 int i, first_rbe, num_scroll;
1133
1134 /* the entry that is going to vanish */
1135 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1136 if (!rbe)
1137 goto err_out;
1138 num_scroll = NUM_LINES(rbe->len);
1139 first_rbe = first_visible_rbe(&lines);
1140 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1141 goto err_out;
1142 scroll_position++;
1143 wscrl(bot.win, -num_scroll);
1144 i = draw_top_rbe(&lines);
1145 if (i < 0)
1146 goto err_out;
1147 while (i > 0 && lines < num_scroll) {
1148 int rbe_lines;
1149 rbe = ringbuffer_get(bot_win_rb, --i);
1150 if (!rbe)
1151 break;
1152 rbe_lines = NUM_LINES(rbe->len);
1153 lines += rbe_lines;
1154 // fprintf(stderr, "msg: %s\n", rbe->msg);
1155 wattron(bot.win, COLOR_PAIR(rbe->color));
1156 waddstr(bot.win, "\n");
1157 waddstr(bot.win, rbe->msg);
1158 if (!i)
1159 break;
1160 i--;
1161 }
1162 wrefresh(bot.win);
1163 print_scroll_msg();
1164 return;
1165 err_out:
1166 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1167 }
1168
1169 static void com_ll_decr(void)
1170 {
1171 if (conf.loglevel_arg <= DEBUG) {
1172 print_in_bar(COLOR_ERRMSG,
1173 "loglevel already at maximal verbosity\n");
1174 return;
1175 }
1176 conf.loglevel_arg--;
1177 print_in_bar(COLOR_MSG, "loglevel set to %d\n", conf.loglevel_arg);
1178 }
1179
1180 static void com_ll_incr(void)
1181 {
1182 if (conf.loglevel_arg >= EMERG) {
1183 print_in_bar(COLOR_ERRMSG,
1184 "loglevel already at miminal verbosity\n");
1185 return;
1186 }
1187 conf.loglevel_arg++;
1188 print_in_bar(COLOR_MSG, "loglevel set to %d\n", conf.loglevel_arg);
1189 }
1190
1191 /*
1192 * reread configuration, terminate on errors
1193 */
1194 static void com_reread_conf(void)
1195 {
1196 char *cf =configfile_exists();
1197 struct gui_cmdline_parser_params params = {
1198 .override = 1,
1199 .initialize = 1,
1200 .check_required = 0,
1201 .check_ambiguity = 0
1202 };
1203
1204 if (!cf) {
1205 PARA_WARNING_LOG("there is no configuration to read");
1206 return;
1207 }
1208 PARA_INFO_LOG("rereading command line options and config file");
1209 gui_cmdline_parser(_argc, _argv, &conf);
1210 gui_cmdline_parser_config_file(cf, &conf, &params);
1211 PARA_NOTICE_LOG("config file reloaded");
1212 if (check_key_map_args() < 0)
1213 finish(EXIT_FAILURE);
1214 }
1215
1216 static void com_help(void)
1217 {
1218 int i;
1219
1220 for (i = 0; i < conf.key_map_given; ++i) {
1221 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1222 const char *handler_text = "???", *desc = NULL;
1223
1224 if (!split_key_map(tmp, &handler, &arg)) {
1225 free(tmp);
1226 return;
1227 }
1228 switch (*handler) {
1229 case 'i':
1230 handler_text = "internal";
1231 desc = command_list[find_cmd_byname(arg)].description;
1232 break;
1233 case 'x': handler_text = "external"; break;
1234 case 'd': handler_text = "display "; break;
1235 case 'p': handler_text = "para "; break;
1236 }
1237 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1238 strlen(arg) < 8? "\t" : "",
1239 desc? desc : "");
1240 free(tmp);
1241 }
1242 for (i = 0; command_list[i].handler; i++) {
1243 struct gui_command gc = command_list[i];
1244
1245 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1246 strlen(gc.name) < 8? "\t" : "",
1247 gc.description);
1248 }
1249 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1250 "for more info");
1251 }
1252
1253 static void com_shrink_top_win(void)
1254 {
1255 if (top.lines <= theme.top_lines_min) {
1256 PARA_WARNING_LOG("can not decrease top window");
1257 return;
1258 }
1259 init_wins(top.lines - 1);
1260 wclear(top.win);
1261 print_all_items();
1262 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1263 }
1264
1265 static void com_enlarge_top_win(void)
1266 {
1267 if (bot.lines < 3) {
1268 PARA_WARNING_LOG("can not increase top window");
1269 return;
1270 }
1271 init_wins(top.lines + 1);
1272 wclear(top.win);
1273 print_all_items();
1274 print_in_bar(COLOR_MSG, "increased top window");
1275 }
1276
1277 static void com_version(void)
1278 {
1279 print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1280 CODENAME "\"");
1281 }
1282
1283 static void com_quit(void)
1284 {
1285 finish(0);
1286 }
1287
1288 static void com_refresh(void)
1289 {
1290 shutdown_curses();
1291 init_curses();
1292 }
1293
1294 static void change_theme(int next)
1295 {
1296 if (next)
1297 next_theme(&theme);
1298 else
1299 prev_theme(&theme);
1300 /* This seems to be needed twice, why? */
1301 com_refresh();
1302 com_refresh();
1303 PARA_NOTICE_LOG("new theme: %s", theme.name);
1304 }
1305
1306 static void com_next_theme(void)
1307 {
1308 change_theme(1);
1309 }
1310
1311 static void com_prev_theme(void)
1312 {
1313 change_theme(0);
1314 }
1315
1316
1317 static void handle_command(int c)
1318 {
1319 int i;
1320
1321 /* first check user's key bindings */
1322 for (i = 0; i < conf.key_map_given; ++i) {
1323 char tmp[MAXLINE], *handler, *arg;
1324
1325 strcpy(tmp, conf.key_map_arg[i]);
1326 if (!split_key_map(tmp, &handler, &arg))
1327 return;
1328 if (!strcmp(tmp, km_keyname(c))) {
1329 if (*handler == 'd') {
1330 display_cmd(arg);
1331 return;
1332 }
1333 if (*handler == 'x') {
1334 external_cmd(arg);
1335 return;
1336 }
1337 if (*handler == 'p') {
1338 client_cmd_cmdline(arg);
1339 return;
1340 }
1341 if (*handler == 'i') {
1342 int num = find_cmd_byname(arg);
1343 if (num >= 0)
1344 command_list[num].handler();
1345 return;
1346 }
1347 }
1348 }
1349 /* not found, check internal key bindings */
1350 for (i = 0; command_list[i].handler; i++) {
1351 if (!strcmp(km_keyname(c), command_list[i].key)) {
1352 command_list[i].handler();
1353 return;
1354 }
1355 }
1356 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1357 km_keyname(c));
1358 }
1359
1360 int main(int argc, char *argv[])
1361 {
1362 int ret;
1363 char *cf;
1364
1365 _argc = argc;
1366 _argv = argv;
1367
1368 if (gui_cmdline_parser(argc, argv, &conf)) {
1369 fprintf(stderr, "parse error while reading command line\n");
1370 exit(EXIT_FAILURE);
1371 }
1372 HANDLE_VERSION_FLAG("gui", conf);
1373 init_theme(0, &theme);
1374 top.lines = theme.top_lines_default;
1375 if (check_key_map_args() < 0) {
1376 fprintf(stderr, "invalid key map\n");
1377 exit(EXIT_FAILURE);
1378 }
1379 cf = configfile_exists();
1380 if (!cf && conf.config_file_given) {
1381 fprintf(stderr, "can not read config file %s\n",
1382 conf.config_file_arg);
1383 exit(EXIT_FAILURE);
1384 }
1385 if (cf) {
1386 struct gui_cmdline_parser_params params = {
1387 .override = 0,
1388 .initialize = 0,
1389 .check_required = 0,
1390 .check_ambiguity = 0
1391 };
1392 gui_cmdline_parser_config_file(cf, &conf, &params);
1393 }
1394 if (check_key_map_args() < 0) {
1395 fprintf(stderr, "invalid key map in config file\n");
1396 exit(EXIT_FAILURE);
1397 }
1398 setup_signal_handling();
1399 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1400 initscr(); /* needed only once, always successful */
1401 init_curses();
1402 print_welcome();
1403 for (;;) {
1404 print_status_bar();
1405 ret = do_select(GETCH_MODE);
1406 if (!ret)
1407 continue;
1408 print_in_bar(COLOR_MSG, " ");
1409 handle_command(ret);
1410 }
1411 }