command_util.sh: Don't replace newlines by spaces.
[paraslash.git] / gui.c
1 /*
2 * Copyright (C) 1998-2007 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file gui.c ncurses-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 <curses.h>
16 #include "ringbuffer.h"
17 #include "gui_common.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 extern const char *status_item_list[NUM_STAT_ITEMS];
27 static char *stat_content[NUM_STAT_ITEMS];
28
29 #define STANDARD_STATUS_BAR "para_gui " PACKAGE_VERSION " (hit ? for help)"
30
31 static int signal_pipe;
32
33 static void finish(int sig);
34
35 static struct win_data {
36 WINDOW *win;
37 NCURSES_SIZE_T begx;
38 NCURSES_SIZE_T begy;
39 NCURSES_SIZE_T cols;
40 NCURSES_SIZE_T lines;
41 } top, bot, sb, in, sep;
42
43 #define RINGBUFFER_SIZE 512
44 struct rb_entry {
45 char *msg;
46 size_t len;
47 int color;
48 };
49 void *bot_win_rb;
50 #define NUM_LINES(len) (1 + (len) / bot.cols)
51
52 static unsigned scroll_position;
53
54 static int cmd_died, curses_active;
55 static pid_t cmd_pid;
56
57 static int command_pipe = -1;
58 static int audiod_pipe = -1;
59 static struct gui_args_info conf;
60
61 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
62
63
64 #define COLOR_STATUSBAR 32
65 #define COLOR_COMMAND 33
66 #define COLOR_OUTPUT 34
67 #define COLOR_MSG 35
68 #define COLOR_ERRMSG 36
69 #define COLOR_WELCOME 37
70 #define COLOR_SEPARATOR 38
71 #define COLOR_TOP 39
72 #define COLOR_BOT 40
73
74 struct gui_command {
75 const char *key;
76 const char *name;
77 const char *description;
78 void (*handler)(void);
79 };
80
81 struct stat_item {
82 char name[MAXLINE];
83 char prefix[MAXLINE];
84 char postfix[MAXLINE];
85 unsigned y;
86 unsigned x;
87 unsigned len;
88 int fg, bg;
89 int align;
90 char content[MAXLINE];
91 };
92
93 static struct gui_theme theme;
94
95 int _argc;
96 char **_argv;
97
98 static void com_help(void);
99 static void com_reread_conf(void);
100 static void com_enlarge_top_win(void);
101 static void com_shrink_top_win(void);
102 static void com_version(void);
103 static void com_quit(void);
104 static void com_refresh(void);
105 static void com_ll_incr(void);
106 static void com_ll_decr(void);
107 static void com_prev_theme(void);
108 static void com_next_theme(void);
109 static void com_scroll_up(void);
110 static void com_scroll_down(void);
111 static void com_page_up(void);
112 static void com_page_down(void);
113
114 struct gui_command command_list[] = {
115 {
116 .key = "?",
117 .name = "help",
118 .description = "print help",
119 .handler = com_help
120 }, {
121 .key = "+",
122 .name = "enlarge_win",
123 .description = "enlarge the top window",
124 .handler = com_enlarge_top_win
125 }, {
126 .key = "-",
127 .name = "shrink_win",
128 .description = "shrink the top window",
129 .handler = com_shrink_top_win
130 }, {
131 .key = "r",
132 .name = "reread_conf",
133 .description = "reread configuration file",
134 .handler = com_reread_conf
135 }, {
136 .key = "q",
137 .name = "quit",
138 .description = "exit para_gui",
139 .handler = com_quit
140 }, {
141 .key = "^L",
142 .name = "refresh",
143 .description = "redraw the screen",
144 .handler = com_refresh
145 }, {
146 .key = ".",
147 .name = "next_theme",
148 .description = "switch to next theme",
149 .handler = com_next_theme
150 }, {
151 .key = ",",
152 .name = "prev_theme",
153 .description = "switch to previous stream",
154 .handler = com_prev_theme
155 }, {
156 .key = ">",
157 .name = "ll_incr",
158 .description = "increase loglevel (decreases verbosity)",
159 .handler = com_ll_incr
160 }, {
161 .key = "<",
162 .name = "ll_decr",
163 .description = "decrease loglevel (increases verbosity)",
164 .handler = com_ll_decr
165 }, {
166 .key = "V",
167 .name = "version",
168 .description = "show the para_gui version",
169 .handler = com_version
170 }, {
171 .key = "<up>",
172 .name = "scroll_up",
173 .description = "scroll up one line",
174 .handler = com_scroll_up
175 }, {
176 .key = "<down>",
177 .name = "scroll_down",
178 .description = "scroll down one line",
179 .handler = com_scroll_down
180 }, {
181 .key = "<ppage>",
182 .name = "page_up",
183 .description = "scroll up one page",
184 .handler = com_page_up
185 }, {
186 .key = "<npage>",
187 .name = "page_down",
188 .description = "scroll down one page",
189 .handler = com_page_down
190 }, {
191 .handler = NULL
192 }
193 };
194
195 static int find_cmd_byname(char *name)
196 {
197 int i;
198
199 for (i = 0; command_list[i].handler; i++)
200 if (!strcmp(command_list[i].name, name))
201 return i;
202 return -1;
203 }
204
205 /* taken from mutt */
206 static char *km_keyname(int c)
207 {
208 static char buf[10];
209
210 if (c == KEY_UP) {
211 sprintf(buf, "<up>");
212 return buf;
213 }
214 if (c == KEY_DOWN) {
215 sprintf(buf, "<down>");
216 return buf;
217 }
218 if (c == KEY_LEFT) {
219 sprintf(buf, "<left>");
220 return buf;
221 }
222 if (c == KEY_RIGHT) {
223 sprintf(buf, "<right>");
224 return buf;
225 }
226 if (c == KEY_NPAGE) {
227 sprintf(buf, "<npage>");
228 return buf;
229 }
230 if (c == KEY_PPAGE) {
231 sprintf(buf, "<ppage>");
232 return buf;
233 }
234 if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
235 if (c < 0)
236 c += 256;
237 if (c < 128) {
238 buf[0] = '^';
239 buf[1] = (c + '@') & 0x7f;
240 buf[2] = 0;
241 } else
242 snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
243 (c >> 3) & 7, c & 7);
244 } else if (c >= KEY_F0 && c < KEY_F(256))
245 sprintf(buf, "<F%d>", c - KEY_F0);
246 else if (isprint(c))
247 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
248 else
249 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
250 return buf;
251 }
252
253 static char *configfile_exists(void)
254 {
255 static char *config_file;
256 char *tmp;
257
258 if (!conf.config_file_given) {
259 if (!config_file) {
260 char *home = para_homedir();
261 config_file = make_message("%s/.paraslash/gui.conf",
262 home);
263 free(home);
264 }
265 tmp = config_file;
266 } else
267 tmp = conf.config_file_arg;
268 return file_exists(tmp)? tmp: NULL;
269 }
270
271 /*
272 * print num spaces to curses window
273 */
274 static void add_spaces(WINDOW* win, unsigned int num)
275 {
276 while (num > 0) {
277 num--;
278 waddstr(win, " ");
279 }
280 }
281
282 /*
283 * print aligned string to curses window. This function always prints
284 * exactly len chars.
285 */
286 static int align_str(WINDOW* win, const char *string, unsigned int len,
287 unsigned int align)
288 {
289 int num; /* of spaces */
290 char *str;
291
292 if (!win || !string)
293 return -1;
294 num = len - strlen(string);
295 str = para_strdup(string);
296 if (num < 0) {
297 str[len] = '\0';
298 num = 0;
299 }
300 if (align == LEFT) {
301 waddstr(win, str);
302 add_spaces(win, num);
303 } else if (align == RIGHT) {
304 add_spaces(win, num);
305 waddstr(win, str);
306 } else {
307 add_spaces(win, num / 2);
308 waddstr(win, str[0]? str: "");
309 add_spaces(win, num - num / 2);
310 }
311 free(str);
312 return 1;
313 }
314
315 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
316 {
317 char *msg;
318
319 if (!curses_active)
320 return;
321 wattron(in.win, COLOR_PAIR(color));
322 PARA_VSPRINTF(fmt, msg);
323 wmove(in.win, 0, 0);
324 align_str(in.win, msg, sb.cols, LEFT);
325 free(msg);
326 wrefresh(in.win);
327 }
328
329 /*
330 * update the status bar
331 */
332 static void print_status_bar(void)
333 {
334 if (!curses_active)
335 return;
336 wmove(sb.win, 0, 0);
337 align_str(sb.win, STANDARD_STATUS_BAR, sb.cols, CENTER);
338 wrefresh(sb.win);
339 }
340
341 /*
342 * get the number of the oldest rbe that is (partially) visible. On return,
343 * lines contains the sum of the number of lines of all visable entries. If the
344 * first one is only partially visible, lines is greater than bot.lines.
345 */
346 static int first_visible_rbe(unsigned *lines)
347 {
348 int i;
349 *lines = 0;
350 for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
351 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
352 int rbe_lines;
353 if (!rbe)
354 return i - 1;
355 // fprintf(stderr, "found: %s\n", rbe->msg);
356 rbe_lines = NUM_LINES(rbe->len);
357 if (rbe_lines > bot.lines)
358 return -1;
359 *lines += rbe_lines;
360 if (*lines >= bot.lines)
361 return i;
362 }
363 return RINGBUFFER_SIZE - 1;
364 }
365
366 static int draw_top_rbe(unsigned *lines)
367 {
368 unsigned len;
369 int offset, fvr = first_visible_rbe(lines);
370 struct rb_entry *rbe;
371
372 if (fvr < 0)
373 return -1;
374 wmove(bot.win, 0, 0);
375 rbe = ringbuffer_get(bot_win_rb, fvr);
376 if (!rbe)
377 return -1;
378 /* first rbe might be only partially visible */
379 offset = (*lines - bot.lines) * bot.cols;
380 len = strlen(rbe->msg);
381 if (offset < 0 || len < offset)
382 return -1;
383 wattron(bot.win, COLOR_PAIR(rbe->color));
384 waddstr(bot.win, rbe->msg + offset);
385 *lines = NUM_LINES(len - offset);
386 return fvr;
387 }
388
389 static void redraw_bot_win(void)
390 {
391 unsigned lines;
392 int i;
393
394 wmove(bot.win, 0, 0);
395 wclear(bot.win);
396 i = draw_top_rbe(&lines);
397 if (i <= 0)
398 goto out;
399 while (i > 0 && lines < bot.lines) {
400 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
401 if (!rbe) {
402 lines++;
403 waddstr(bot.win, "\n");
404 continue;
405 }
406 lines += NUM_LINES(rbe->len);
407 wattron(bot.win, COLOR_PAIR(rbe->color));
408 waddstr(bot.win, "\n");
409 waddstr(bot.win, rbe->msg);
410 }
411 out:
412 wrefresh(bot.win);
413 }
414
415 static void rb_add_entry(int color, char *msg)
416 {
417 struct rb_entry *old, *new = para_malloc(sizeof(struct rb_entry));
418 int x, y;
419 new->color = color;
420 new->len = strlen(msg);
421 new->msg = msg;
422 old = ringbuffer_add(bot_win_rb, new);
423 // fprintf(stderr, "added: %s\n", new->msg);
424 if (old) {
425 free(old->msg);
426 free(old);
427 }
428 if (scroll_position) {
429 /* discard current scrolling, like xterm does */
430 scroll_position = 0;
431 redraw_bot_win();
432 return;
433 }
434 wattron(bot.win, COLOR_PAIR(color));
435 getyx(bot.win, y, x);
436 if (y || x)
437 waddstr(bot.win, "\n");
438 waddstr(bot.win, msg);
439 }
440
441 /*
442 * print formated output to bot win and refresh
443 */
444 __printf_2_3 static void outputf(int color, const char* fmt,...)
445 {
446 char *msg;
447
448 if (!curses_active)
449 return;
450 PARA_VSPRINTF(fmt, msg);
451 rb_add_entry(color, msg);
452 wrefresh(bot.win);
453 }
454
455 static int add_output_line(char *line, __a_unused void *data)
456 {
457 if (!curses_active)
458 return 1;
459 rb_add_entry(COLOR_OUTPUT, para_strdup(line));
460 return 1;
461 }
462
463 void para_log(int ll, const char *fmt,...)
464 {
465 int color;
466 char *msg;
467
468 if (ll < conf.loglevel_arg || !curses_active)
469 return;
470 switch (ll) {
471 case DEBUG:
472 case INFO:
473 case NOTICE:
474 color = COLOR_MSG;
475 break;
476 default:
477 color = COLOR_ERRMSG;
478 }
479 PARA_VSPRINTF(fmt, msg);
480 chop(msg);
481 rb_add_entry(color, msg);
482 wrefresh(bot.win);
483 }
484
485 static void setup_signal_handling(void)
486 {
487 signal_pipe = para_signal_init();
488 para_install_sighandler(SIGINT);
489 para_install_sighandler(SIGTERM);
490 para_install_sighandler(SIGCHLD);
491 para_install_sighandler(SIGWINCH);
492 para_install_sighandler(SIGUSR1);
493 signal(SIGPIPE, SIG_IGN);
494 signal(SIGHUP, SIG_IGN);
495 }
496
497 static void do_exit(int ret)
498 {
499 signal(SIGTERM, SIG_IGN);
500 kill(0, SIGTERM);
501 exit(ret);
502 }
503
504 static void shutdown_curses(void)
505 {
506 if (!curses_active)
507 return;
508 def_prog_mode();
509 curses_active = 0;
510 endwin();
511 }
512
513 static void finish(int ret)
514 {
515 shutdown_curses();
516 do_exit(ret);
517 }
518
519 /*
520 * exit curses and print given message to stdout/stderr
521 */
522 __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
523 {
524 va_list argp;
525 FILE *outfd = ret? stderr: stdout;
526
527 shutdown_curses();
528 va_start(argp, fmt);
529 vfprintf(outfd, fmt, argp);
530 va_end(argp);
531 do_exit(ret);
532 }
533
534 static void print_welcome(void)
535 {
536 int ll = conf.loglevel_arg;
537 if (ll > NOTICE)
538 return;
539 outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
540 " \"" CODENAME "\". Theme: %s", theme.name);
541 wclrtoeol(bot.win);
542 }
543
544 /*
545 * init all windows
546 */
547 static void init_wins(int top_lines)
548 {
549 int i;
550
551 top.lines = top_lines;
552 top.cols = COLS;
553 top.begy = 0;
554 top.begx = 0;
555
556 bot.lines = LINES - top.lines - 3;
557 bot.cols = COLS;
558 bot.begy = top.lines + 1;
559 bot.begx = 0;
560
561 sb.lines = 1;
562 sb.cols = COLS;
563 sb.begy = LINES - 2;
564 sb.begx = 0;
565
566 in.lines = 1;
567 in.cols = COLS;
568 in.begy = LINES - 1;
569 in.begx = 0;
570
571 sep.lines = 1;
572 sep.cols = COLS;
573 sep.begy = top.lines;
574 sep.begx = 0;
575
576 assume_default_colors(theme.default_fg, theme.default_bg);
577 if (top.win) {
578 mvwin(top.win, top.begy, top.begx);
579 wresize(top.win, top.lines, top.cols);
580
581 mvwin(sb.win, sb.begy, sb.begx);
582 wresize(sb.win, sb.lines, sb.cols);
583
584 mvwin(sep.win, sep.begy, sep.begx);
585 wresize(sep.win, sep.lines, sep.cols);
586
587 mvwin(bot.win, bot.begy, bot.begx);
588 wresize(bot.win, bot.lines, bot.cols);
589
590 mvwin(in.win, in.begy, in.begx);
591 wresize(in.win, in.lines, in.cols);
592 } else {
593 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
594 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
595 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
596 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
597 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
598 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
599 msg_n_exit(1, "Error: Cannot create curses windows\n");
600 wclear(bot.win);
601 wclear(sb.win);
602 wclear(in.win);
603 scrollok(bot.win, 1);
604 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
605 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
606 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
607 wattron(top.win, COLOR_PAIR(COLOR_TOP));
608 nodelay(top.win, 1);
609 nodelay(bot.win, 1);
610 nodelay(sb.win, 1);
611 nodelay(in.win, 0);
612
613 keypad(top.win, 1);
614 keypad(bot.win, 1);
615 keypad(sb.win, 1);
616 keypad(in.win, 1);
617 print_status_bar();
618 }
619 wmove(sep.win, 0, 0);
620 for (i = 1; i <= COLS; i++)
621 waddstr(sep.win, theme.sep_str);
622 wclear(top.win);
623 //wclear(bot.win);
624 wnoutrefresh(top.win);
625 wnoutrefresh(bot.win);
626 //wnoutrefresh(sb.win);
627 print_status_bar();
628 wnoutrefresh(in.win);
629 wnoutrefresh(sep.win);
630 doupdate();
631 }
632
633 static void check_geometry(void)
634 {
635 if (LINES < theme.lines_min || COLS < theme.cols_min)
636 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
637 " (need at least %dx%d)\n", COLS, LINES,
638 theme.cols_min, theme.lines_min);
639 }
640
641 /*
642 * Print stat item #i to curses window
643 */
644 static void print_stat_item(int i)
645 {
646 char *tmp;
647 struct stat_item_data d = theme.data[i];
648 char *c = stat_content[i];
649
650 if (!curses_active || !d.len || !c)
651 return;
652 tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
653 // PARA_DEBUG_LOG("%s: read: %s\n", __func__, tmp);
654 wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
655 wrefresh(top.win);
656 wattron(top.win, COLOR_PAIR(i + 1));
657 align_str(top.win, tmp, d.len * COLS / 100, d.align);
658 free(tmp);
659 wrefresh(top.win);
660 }
661
662 static void print_all_items(void)
663 {
664 int i;
665
666 if (!curses_active)
667 return;
668 for (i = 0; i < NUM_STAT_ITEMS; i++)
669 print_stat_item(i);
670 }
671 static void clear_all_items(void)
672 {
673 int i;
674
675 for (i = 0; i < NUM_STAT_ITEMS; i++) {
676 free(stat_content[i]);
677 stat_content[i] = para_strdup("");
678 }
679 }
680
681 static void init_colors(void)
682 {
683 int i;
684 if (!has_colors())
685 msg_n_exit(EXIT_FAILURE, "Error: No color term\n");
686 start_color();
687 for (i = 0; i < NUM_STAT_ITEMS; i++)
688 if (theme.data[i].len)
689 init_pair(i + 1, theme.data[i].fg, theme.data[i].bg);
690 init_pair(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
691 init_pair(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
692 init_pair(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
693 init_pair(COLOR_MSG, theme.msg_fg, theme.msg_bg);
694 init_pair(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
695 init_pair(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
696 init_pair(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
697 init_pair(COLOR_TOP, theme.default_fg, theme.default_bg);
698 init_pair(COLOR_BOT, theme.default_fg, theme.default_bg);
699 }
700
701 /*
702 * (re-)initialize the curses library FIXME: Error checking
703 */
704 static void init_curses(void)
705 {
706 curses_active = 1;
707 if (top.win && refresh() == ERR) { /* refesh is really needed */
708 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
709 }
710 check_geometry();
711 curs_set(0); /* make cursor invisible, ignore errors */
712 // if (noraw() == ERR);
713 // msg_n_exit(EXIT_FAILURE, "can not place terminal out of "
714 // "raw mode\n");
715 nonl(); /* tell curses not to do NL->CR/NL on output */
716 noecho(); /* don't echo input */
717 cbreak(); /* take input chars one at a time, no wait for \n */
718 //reset_prog_mode();
719 init_colors();
720 clear();
721 init_wins(theme.top_lines_default);
722 print_all_items();
723 noecho(); /* don't echo input */
724 }
725
726
727 static void check_sigchld(void)
728 {
729 int ret;
730 pid_t pid;
731 reap_next_child:
732 ret = para_reap_child(&pid);
733 if (ret <= 0)
734 return;
735 if (pid == cmd_pid) {
736 cmd_pid = 0;
737 cmd_died = 1;
738 }
739 goto reap_next_child;
740 }
741
742 /*
743 * print status line if line starts with known command.
744 */
745 static int check_stat_line(char *line, __a_unused void *data)
746 {
747 int i;
748
749 // PARA_INFO_LOG("%s: checking: %s\n", __func__, line);
750 i = stat_line_valid(line);
751 if (i >= 0) {
752 line += strlen(status_item_list[i]) + 1;
753 free(stat_content[i]);
754 stat_content[i] = para_strdup(line);
755 print_stat_item(i);
756 }
757 return 1;
758 }
759
760 /*
761 * This sucker modifies its first argument. *handler and *arg are
762 * pointers to 0-terminated strings (inside line). Crap.
763 */
764 static int split_key_map(char *line, char **handler, char **arg)
765 {
766 if (!(*handler = strchr(line + 1, ':')))
767 goto err_out;
768 **handler = '\0';
769 (*handler)++;
770 if (!(*arg = strchr(*handler, ':')))
771 goto err_out;
772 **arg = '\0';
773 (*arg)++;
774 return 1;
775 err_out:
776 return 0;
777 }
778
779 static int check_key_map_args(void)
780 {
781 char *s;
782 int i, ret = -1;
783 char *tmp = NULL, *handler, *arg;
784
785 for (i = 0; i < conf.key_map_given; ++i) {
786 s = conf.key_map_arg[i];
787 if (!(*s))
788 goto err_out;
789 free(tmp);
790 tmp = para_strdup(s);
791 if (!split_key_map(tmp, &handler, &arg))
792 goto err_out;
793 if (strlen(handler) != 1)
794 goto err_out;
795 if (*handler != 'x'
796 && *handler != 'd'
797 && *handler != 'i'
798 && *handler != 'p')
799 goto err_out;
800 if (*handler != 'i')
801 continue;
802 if (find_cmd_byname(arg) < 0)
803 goto err_out;
804 }
805 ret = 0;
806 err_out:
807 free(tmp);
808 return ret;
809 }
810
811 /*
812 * React to various signal-related events
813 */
814 static void handle_signal(int sig)
815 {
816 switch (sig) {
817 case SIGTERM:
818 msg_n_exit(EXIT_FAILURE,
819 "only the good die young (caught SIGTERM))\n");
820 return;
821 case SIGWINCH:
822 if (curses_active) {
823 shutdown_curses();
824 init_curses();
825 redraw_bot_win();
826 }
827 return;
828 case SIGINT:
829 PARA_WARNING_LOG("%s", "caught SIGINT, reset");
830 /* Nothing to do. SIGINT killed our child, para_client stat.
831 * This get noticed by do_select which resets everything
832 */
833 return;
834 case SIGUSR1:
835 PARA_NOTICE_LOG("%s", "got SIGUSR1, rereading configuration");
836 com_reread_conf();
837 return;
838 case SIGCHLD:
839 check_sigchld();
840 return;
841 }
842 }
843
844 static int open_audiod_pipe(void)
845 {
846 static int init = 1;
847
848 if (init)
849 init = 0;
850 else
851 sleep(1);
852 return para_open_audiod_pipe(conf.stat_cmd_arg);
853 }
854
855 /*
856 * This is the core select loop. Besides the (internal) signal
857 * pipe, the following other fds are checked according to the mode:
858 *
859 * GETCH_MODE: check stdin, return when key is pressed
860 *
861 * COMMAND_MODE: check command_pipe and stdin. Return when a screen full
862 * of output has been read or when other end has closed command pipe or
863 * when any key is pressed.
864 *
865 * EXTERNAL_MODE: Check only signal pipe. Used when an external command
866 * is running. During that thime curses is disabled. Returns when
867 * cmd_pid == 0.
868 */
869 static int do_select(int mode)
870 {
871 fd_set rfds;
872 int ret;
873 int max_fileno, cp_numread = 1;
874 char command_buf[4096] = "";
875 int cbo = 0; /* command buf offset */
876 struct timeval tv;
877 repeat:
878 tv.tv_sec = conf.timeout_arg / 1000;
879 tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
880 // ret = refresh_status();
881 FD_ZERO(&rfds);
882 max_fileno = 0;
883 /* audiod pipe */
884 if (audiod_pipe < 0)
885 audiod_pipe = open_audiod_pipe();
886 if (audiod_pipe >= 0)
887 para_fd_set(audiod_pipe, &rfds, &max_fileno);
888 /* signal pipe */
889 para_fd_set(signal_pipe, &rfds, &max_fileno);
890 /* command pipe only for COMMAND_MODE */
891 if (command_pipe >= 0 && mode == COMMAND_MODE)
892 para_fd_set(command_pipe, &rfds, &max_fileno);
893 ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
894 if (ret <= 0)
895 goto check_return; /* skip fd checks */
896 /* signals */
897 if (FD_ISSET(signal_pipe, &rfds)) {
898 int sig_nr = para_next_signal();
899 if (sig_nr > 0)
900 handle_signal(sig_nr);
901 }
902 /* read command pipe if ready */
903 if (command_pipe >= 0 && mode == COMMAND_MODE &&
904 FD_ISSET(command_pipe, &rfds)) {
905 cp_numread = read(command_pipe, command_buf + cbo,
906 sizeof(command_buf) - 1 - cbo);
907 if (cp_numread >= 0)
908 cbo += cp_numread;
909 else {
910 if (cp_numread < 0)
911 PARA_ERROR_LOG("read error (%d)", cp_numread);
912 close(command_pipe);
913 command_pipe = -1;
914 }
915 }
916 if (audiod_pipe >= 0 && FD_ISSET(audiod_pipe, &rfds))
917 if (read_audiod_pipe(audiod_pipe, check_stat_line) <= 0) {
918 close(audiod_pipe);
919 audiod_pipe = -1;
920 clear_all_items();
921 free(stat_content[SI_BASENAME]);
922 stat_content[SI_BASENAME] =
923 para_strdup("audiod not running!?");
924 print_all_items();
925 }
926 check_return:
927 switch (mode) {
928 case COMMAND_MODE:
929 if (cp_numread <= 0 && !cbo) /* command complete */
930 return 0;
931 if (cbo)
932 cbo = for_each_line(command_buf, cbo,
933 &add_output_line, NULL);
934 if (cp_numread <= 0)
935 cbo = 0;
936 wrefresh(bot.win);
937 ret = wgetch(top.win);
938 if (ret != ERR && ret != KEY_RESIZE) {
939 if (command_pipe) {
940 close(command_pipe);
941 command_pipe = -1;
942 }
943 if (cmd_pid)
944 kill(cmd_pid, SIGTERM);
945 return -1;
946 }
947 break;
948 case GETCH_MODE:
949 ret = wgetch(top.win);
950 if (ret != ERR && ret != KEY_RESIZE)
951 return ret;
952 break;
953 case EXTERNAL_MODE:
954 if (cmd_died) {
955 cmd_died = 0;
956 return 0;
957 }
958 }
959 goto repeat;
960 }
961
962 /*
963 * read from command pipe and print data to bot window
964 */
965 static int send_output(void)
966 {
967 if (command_pipe < 0)
968 return 0;
969 if (do_select(COMMAND_MODE) >= 0)
970 PARA_INFO_LOG("%s", "command complete");
971 else
972 PARA_NOTICE_LOG("%s", "command aborted");
973 print_in_bar(COLOR_MSG, " ");
974 return 1;
975 }
976
977 static int client_cmd_cmdline(char *cmd)
978 {
979 int ret, fds[3] = {0, 1, 0};
980 char *c = make_message(BINDIR "/para_client %s", cmd);
981
982 outputf(COLOR_COMMAND, "%s", c);
983 print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
984 ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
985 free(c);
986 if (ret < 0)
987 return -1;
988 command_pipe = fds[1];
989 mark_fd_nonblock(command_pipe);
990 return send_output();
991 }
992
993 /*
994 * exec command and print output to bot win
995 */
996 static int display_cmd(char *cmd)
997 {
998 int fds[3] = {0, 1, 0};
999
1000 print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1001 outputf(COLOR_COMMAND, "%s", cmd);
1002 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1003 return -1;
1004 command_pipe = fds[1];
1005 mark_fd_nonblock(command_pipe);
1006 return send_output();
1007 }
1008
1009 /*
1010 * shutdown curses and stat pipe before executing external commands
1011 */
1012 static int external_cmd(char *cmd)
1013 {
1014 int fds[3] = {-1, -1, -1};
1015
1016 if (cmd_pid)
1017 return -1;
1018 shutdown_curses();
1019 para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1020 cmd_died = 0;
1021 do_select(EXTERNAL_MODE);
1022 init_curses();
1023 return 0;
1024 }
1025
1026 static void print_scroll_msg(void)
1027 {
1028 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1029 int first_rbe = first_visible_rbe(&lines_total);
1030 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1031 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1032 }
1033
1034 static void com_page_down(void)
1035 {
1036 unsigned lines = 0;
1037 int i = scroll_position;
1038 while (lines < bot.lines && --i > 0) {
1039 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1040 if (!rbe)
1041 break;
1042 lines += NUM_LINES(strlen(rbe->msg));
1043 }
1044 if (lines) {
1045 scroll_position = i;
1046 redraw_bot_win();
1047 print_scroll_msg();
1048 return;
1049 }
1050 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1051 }
1052
1053 static void com_page_up(void)
1054 {
1055 unsigned lines;
1056 int fvr = first_visible_rbe(&lines);
1057 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1058 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1059 return;
1060 }
1061 scroll_position = fvr + 1;
1062 for (; scroll_position > 0; scroll_position--) {
1063 fvr = first_visible_rbe(&lines);
1064 if (lines == bot.lines)
1065 break;
1066 }
1067 redraw_bot_win();
1068 print_scroll_msg();
1069 }
1070
1071 static void com_scroll_down(void)
1072 {
1073 struct rb_entry *rbe;
1074 int rbe_lines;
1075
1076 if (!scroll_position) {
1077 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1078 return;
1079 }
1080 scroll_position--;
1081 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1082 rbe_lines = NUM_LINES(rbe->len);
1083 wscrl(bot.win, rbe_lines);
1084 wmove(bot.win, bot.lines - rbe_lines, 0);
1085 wattron(bot.win, COLOR_PAIR(rbe->color));
1086 waddstr(bot.win, rbe->msg);
1087 wrefresh(bot.win);
1088 print_scroll_msg();
1089 }
1090
1091 static void com_scroll_up(void)
1092 {
1093 struct rb_entry *rbe = NULL;
1094 unsigned lines;
1095 int i, first_rbe, num_scroll;
1096
1097 /* the entry that is going to vanish */
1098 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1099 if (!rbe)
1100 goto err_out;
1101 num_scroll = NUM_LINES(rbe->len);
1102 first_rbe = first_visible_rbe(&lines);
1103 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1104 goto err_out;
1105 scroll_position++;
1106 wscrl(bot.win, -num_scroll);
1107 i = draw_top_rbe(&lines);
1108 if (i < 0)
1109 goto err_out;
1110 while (i > 0 && lines < num_scroll) {
1111 int rbe_lines;
1112 rbe = ringbuffer_get(bot_win_rb, --i);
1113 if (!rbe)
1114 break;
1115 rbe_lines = NUM_LINES(rbe->len);
1116 lines += rbe_lines;
1117 // fprintf(stderr, "msg: %s\n", rbe->msg);
1118 wattron(bot.win, COLOR_PAIR(rbe->color));
1119 waddstr(bot.win, "\n");
1120 waddstr(bot.win, rbe->msg);
1121 if (!i)
1122 break;
1123 i--;
1124 }
1125 wrefresh(bot.win);
1126 print_scroll_msg();
1127 return;
1128 err_out:
1129 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1130 }
1131
1132 static void com_ll_decr(void)
1133 {
1134 if (conf.loglevel_arg <= DEBUG) {
1135 print_in_bar(COLOR_ERRMSG,
1136 "loglevel already at maximal verbosity\n");
1137 return;
1138 }
1139 conf.loglevel_arg--;
1140 print_in_bar(COLOR_MSG, "loglevel set to %d\n", conf.loglevel_arg);
1141 }
1142
1143 static void com_ll_incr(void)
1144 {
1145 if (conf.loglevel_arg >= EMERG) {
1146 print_in_bar(COLOR_ERRMSG,
1147 "loglevel already at miminal verbosity\n");
1148 return;
1149 }
1150 conf.loglevel_arg++;
1151 print_in_bar(COLOR_MSG, "loglevel set to %d\n", conf.loglevel_arg);
1152 }
1153
1154 /*
1155 * reread configuration, terminate on errors
1156 */
1157 static void com_reread_conf(void)
1158 {
1159 char *cf =configfile_exists();
1160 struct gui_cmdline_parser_params params = {
1161 .override = 1,
1162 .initialize = 1,
1163 .check_required = 0,
1164 .check_ambiguity = 0
1165 };
1166
1167 if (!cf) {
1168 PARA_WARNING_LOG("%s", "there is no configuration to read");
1169 return;
1170 }
1171 PARA_INFO_LOG("%s", "rereading command line options and config file");
1172 gui_cmdline_parser(_argc, _argv, &conf);
1173 gui_cmdline_parser_config_file(cf, &conf, &params);
1174 PARA_NOTICE_LOG("%s", "config file reloaded");
1175 if (check_key_map_args() < 0)
1176 finish(EXIT_FAILURE);
1177 }
1178
1179 static void com_help(void)
1180 {
1181 int i;
1182
1183 for (i = 0; i < conf.key_map_given; ++i) {
1184 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1185 const char *handler_text = "???", *desc = NULL;
1186
1187 if (!split_key_map(tmp, &handler, &arg)) {
1188 free(tmp);
1189 return;
1190 }
1191 switch (*handler) {
1192 case 'i':
1193 handler_text = "internal";
1194 desc = command_list[find_cmd_byname(arg)].description;
1195 break;
1196 case 'x': handler_text = "external"; break;
1197 case 'd': handler_text = "display "; break;
1198 case 'p': handler_text = "para "; break;
1199 }
1200 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1201 strlen(arg) < 8? "\t" : "",
1202 desc? desc : "");
1203 free(tmp);
1204 }
1205 for (i = 0; command_list[i].handler; i++) {
1206 struct gui_command gc = command_list[i];
1207
1208 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1209 strlen(gc.name) < 8? "\t" : "",
1210 gc.description);
1211 }
1212 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1213 "for more info");
1214 }
1215
1216 static void com_shrink_top_win(void)
1217 {
1218 if (top.lines <= theme.top_lines_min) {
1219 PARA_WARNING_LOG("%s", "can not decrease top window");
1220 return;
1221 }
1222 init_wins(top.lines - 1);
1223 wclear(top.win);
1224 print_all_items();
1225 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1226 }
1227
1228 static void com_enlarge_top_win(void)
1229 {
1230 if (bot.lines < 3) {
1231 PARA_WARNING_LOG("%s", "can not increase top window");
1232 return;
1233 }
1234 init_wins(top.lines + 1);
1235 wclear(top.win);
1236 print_all_items();
1237 print_in_bar(COLOR_MSG, "increased top window");
1238 }
1239
1240 static void com_version(void)
1241 {
1242 print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1243 CODENAME "\"");
1244 }
1245
1246 static void com_quit(void)
1247 {
1248 finish(0);
1249 }
1250
1251 static void com_refresh(void)
1252 {
1253 shutdown_curses();
1254 init_curses();
1255 }
1256
1257 static void change_theme(int next)
1258 {
1259 if (next)
1260 next_theme(&theme);
1261 else
1262 prev_theme(&theme);
1263 /* This seems to be needed twice, why? */
1264 com_refresh();
1265 com_refresh();
1266 PARA_NOTICE_LOG("new theme: %s", theme.name);
1267 }
1268
1269 static void com_next_theme(void)
1270 {
1271 change_theme(1);
1272 }
1273
1274 static void com_prev_theme(void)
1275 {
1276 change_theme(0);
1277 }
1278
1279
1280 static void handle_command(int c)
1281 {
1282 int i;
1283
1284 /* first check user's key bindings */
1285 for (i = 0; i < conf.key_map_given; ++i) {
1286 char tmp[MAXLINE], *handler, *arg;
1287
1288 strcpy(tmp, conf.key_map_arg[i]);
1289 if (!split_key_map(tmp, &handler, &arg))
1290 return;
1291 if (!strcmp(tmp, km_keyname(c))) {
1292 if (*handler == 'd') {
1293 display_cmd(arg);
1294 return;
1295 }
1296 if (*handler == 'x') {
1297 external_cmd(arg);
1298 return;
1299 }
1300 if (*handler == 'p') {
1301 client_cmd_cmdline(arg);
1302 return;
1303 }
1304 if (*handler == 'i') {
1305 int num = find_cmd_byname(arg);
1306 if (num >= 0)
1307 command_list[num].handler();
1308 return;
1309 }
1310 }
1311 }
1312 /* not found, check internal key bindings */
1313 for (i = 0; command_list[i].handler; i++) {
1314 if (!strcmp(km_keyname(c), command_list[i].key)) {
1315 command_list[i].handler();
1316 return;
1317 }
1318 }
1319 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1320 km_keyname(c));
1321 }
1322
1323 int main(int argc, char *argv[])
1324 {
1325 int ret;
1326 char *cf;
1327
1328 _argc = argc;
1329 _argv = argv;
1330
1331 if (gui_cmdline_parser(argc, argv, &conf)) {
1332 fprintf(stderr, "parse error while reading command line\n");
1333 exit(EXIT_FAILURE);
1334 }
1335 HANDLE_VERSION_FLAG("gui", conf);
1336 init_theme(0, &theme);
1337 top.lines = theme.top_lines_default;
1338 if (check_key_map_args() < 0) {
1339 fprintf(stderr, "invalid key map\n");
1340 exit(EXIT_FAILURE);
1341 }
1342 cf = configfile_exists();
1343 if (!cf && conf.config_file_given) {
1344 fprintf(stderr, "can not read config file %s\n",
1345 conf.config_file_arg);
1346 exit(EXIT_FAILURE);
1347 }
1348 if (cf) {
1349 struct gui_cmdline_parser_params params = {
1350 .override = 0,
1351 .initialize = 0,
1352 .check_required = 0,
1353 .check_ambiguity = 0
1354 };
1355 gui_cmdline_parser_config_file(cf, &conf, &params);
1356 }
1357 if (check_key_map_args() < 0) {
1358 fprintf(stderr, "invalid key map in config file\n");
1359 exit(EXIT_FAILURE);
1360 }
1361 setup_signal_handling();
1362 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1363 initscr(); /* needed only once, always successful */
1364 init_curses();
1365 print_welcome();
1366 for (;;) {
1367 print_status_bar();
1368 ret = do_select(GETCH_MODE);
1369 if (!ret)
1370 continue;
1371 print_in_bar(COLOR_MSG, " ");
1372 handle_command(ret);
1373 }
1374 }