28291a867fd99aea2f6d4abeb96c7e671abc8fc3
[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 "gui.cmdline.h"
10 #include "para.h"
11 #include "gui.h"
12 #include <curses.h>
13 #include "ringbuffer.h"
14 #include "gui_common.h"
15 #include "fd.h"
16 #include "error.h"
17 #include "list.h"
18 #include "sched.h"
19 #include "signal.h"
20
21 /** define the array of error lists needed by para_gui */
22 INIT_GUI_ERRLISTS;
23 extern const char *status_item_list[NUM_STAT_ITEMS];
24 static char *stat_content[NUM_STAT_ITEMS];
25
26 #define STANDARD_STATUS_BAR "para_gui " PACKAGE_VERSION " (hit ? for help)"
27
28 static int signal_pipe;
29
30 static void finish(int sig);
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 void *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 32
62 #define COLOR_COMMAND 33
63 #define COLOR_OUTPUT 34
64 #define COLOR_MSG 35
65 #define COLOR_ERRMSG 36
66 #define COLOR_WELCOME 37
67 #define COLOR_SEPARATOR 38
68 #define COLOR_TOP 39
69 #define COLOR_BOT 40
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 find_cmd_byname(char *name)
193 {
194 int i;
195
196 for (i = 0; command_list[i].handler; i++)
197 if (!strcmp(command_list[i].name, name))
198 return i;
199 return -1;
200 }
201
202 /* taken from mutt */
203 static char *km_keyname(int c)
204 {
205 static char buf[10];
206
207 if (c == KEY_UP) {
208 sprintf(buf, "<up>");
209 return buf;
210 }
211 if (c == KEY_DOWN) {
212 sprintf(buf, "<down>");
213 return buf;
214 }
215 if (c == KEY_LEFT) {
216 sprintf(buf, "<left>");
217 return buf;
218 }
219 if (c == KEY_RIGHT) {
220 sprintf(buf, "<right>");
221 return buf;
222 }
223 if (c == KEY_NPAGE) {
224 sprintf(buf, "<npage>");
225 return buf;
226 }
227 if (c == KEY_PPAGE) {
228 sprintf(buf, "<ppage>");
229 return buf;
230 }
231 if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
232 if (c < 0)
233 c += 256;
234 if (c < 128) {
235 buf[0] = '^';
236 buf[1] = (c + '@') & 0x7f;
237 buf[2] = 0;
238 } else
239 snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
240 (c >> 3) & 7, c & 7);
241 } else if (c >= KEY_F0 && c < KEY_F(256))
242 sprintf(buf, "<F%d>", c - KEY_F0);
243 else if (isprint(c))
244 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
245 else
246 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
247 return buf;
248 }
249
250 static char *configfile_exists(void)
251 {
252 static char *config_file;
253 char *tmp;
254
255 if (!conf.config_file_given) {
256 if (!config_file) {
257 char *home = para_homedir();
258 config_file = make_message("%s/.paraslash/gui.conf",
259 home);
260 free(home);
261 }
262 tmp = config_file;
263 } else
264 tmp = conf.config_file_arg;
265 return file_exists(tmp)? tmp: NULL;
266 }
267
268 /*
269 * print num spaces to curses window
270 */
271 static void add_spaces(WINDOW* win, unsigned int num)
272 {
273 while (num > 0) {
274 num--;
275 waddstr(win, " ");
276 }
277 }
278
279 /*
280 * print aligned string to curses window. This function always prints
281 * exactly len chars.
282 */
283 static int align_str(WINDOW* win, const char *string, unsigned int len,
284 unsigned int align)
285 {
286 int num; /* of spaces */
287 char *str;
288
289 if (!win || !string)
290 return -1;
291 num = len - strlen(string);
292 str = para_strdup(string);
293 if (num < 0) {
294 str[len] = '\0';
295 num = 0;
296 }
297 if (align == LEFT) {
298 waddstr(win, str);
299 add_spaces(win, num);
300 } else if (align == RIGHT) {
301 add_spaces(win, num);
302 waddstr(win, str);
303 } else {
304 add_spaces(win, num / 2);
305 waddstr(win, str[0]? str: "");
306 add_spaces(win, num - num / 2);
307 }
308 free(str);
309 return 1;
310 }
311
312 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
313 {
314 char *msg;
315
316 if (!curses_active)
317 return;
318 wattron(in.win, COLOR_PAIR(color));
319 PARA_VSPRINTF(fmt, msg);
320 wmove(in.win, 0, 0);
321 align_str(in.win, msg, sb.cols, LEFT);
322 free(msg);
323 wrefresh(in.win);
324 }
325
326 /*
327 * update the status bar
328 */
329 static void print_status_bar(void)
330 {
331 if (!curses_active)
332 return;
333 wmove(sb.win, 0, 0);
334 align_str(sb.win, STANDARD_STATUS_BAR, sb.cols, CENTER);
335 wrefresh(sb.win);
336 }
337
338 /*
339 * get the number of the oldest rbe that is (partially) visible. On return,
340 * lines contains the sum of the number of lines of all visable entries. If the
341 * first one is only partially visible, lines is greater than bot.lines.
342 */
343 static int first_visible_rbe(unsigned *lines)
344 {
345 int i;
346 *lines = 0;
347 for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
348 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
349 int rbe_lines;
350 if (!rbe)
351 return i - 1;
352 // fprintf(stderr, "found: %s\n", rbe->msg);
353 rbe_lines = NUM_LINES(rbe->len);
354 if (rbe_lines > bot.lines)
355 return -1;
356 *lines += rbe_lines;
357 if (*lines >= bot.lines)
358 return i;
359 }
360 return RINGBUFFER_SIZE - 1;
361 }
362
363 static int draw_top_rbe(unsigned *lines)
364 {
365 unsigned len;
366 int offset, fvr = first_visible_rbe(lines);
367 struct rb_entry *rbe;
368
369 if (fvr < 0)
370 return -1;
371 wmove(bot.win, 0, 0);
372 rbe = ringbuffer_get(bot_win_rb, fvr);
373 if (!rbe)
374 return -1;
375 /* first rbe might be only partially visible */
376 offset = (*lines - bot.lines) * bot.cols;
377 len = strlen(rbe->msg);
378 if (offset < 0 || len < offset)
379 return -1;
380 wattron(bot.win, COLOR_PAIR(rbe->color));
381 waddstr(bot.win, rbe->msg + offset);
382 *lines = NUM_LINES(len - offset);
383 return fvr;
384 }
385
386 static void redraw_bot_win(void)
387 {
388 unsigned lines;
389 int i;
390
391 wmove(bot.win, 0, 0);
392 wclear(bot.win);
393 i = draw_top_rbe(&lines);
394 if (i <= 0)
395 goto out;
396 while (i > 0 && lines < bot.lines) {
397 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
398 if (!rbe) {
399 lines++;
400 waddstr(bot.win, "\n");
401 continue;
402 }
403 lines += NUM_LINES(rbe->len);
404 wattron(bot.win, COLOR_PAIR(rbe->color));
405 waddstr(bot.win, "\n");
406 waddstr(bot.win, rbe->msg);
407 }
408 out:
409 wrefresh(bot.win);
410 }
411
412 static void rb_add_entry(int color, char *msg)
413 {
414 struct rb_entry *old, *new = para_malloc(sizeof(struct rb_entry));
415 int x, y;
416 new->color = color;
417 new->len = strlen(msg);
418 new->msg = msg;
419 old = ringbuffer_add(bot_win_rb, new);
420 // fprintf(stderr, "added: %s\n", new->msg);
421 if (old) {
422 free(old->msg);
423 free(old);
424 }
425 if (scroll_position) {
426 /* discard current scrolling, like xterm does */
427 scroll_position = 0;
428 redraw_bot_win();
429 return;
430 }
431 wattron(bot.win, COLOR_PAIR(color));
432 getyx(bot.win, y, x);
433 if (y || x)
434 waddstr(bot.win, "\n");
435 waddstr(bot.win, msg);
436 }
437
438 /*
439 * print formated output to bot win and refresh
440 */
441 __printf_2_3 static void outputf(int color, const char* fmt,...)
442 {
443 char *msg;
444
445 if (!curses_active)
446 return;
447 PARA_VSPRINTF(fmt, msg);
448 rb_add_entry(color, msg);
449 wrefresh(bot.win);
450 }
451
452 static int add_output_line(char *line, __a_unused void *data)
453 {
454 if (!curses_active)
455 return 1;
456 rb_add_entry(COLOR_OUTPUT, para_strdup(line));
457 return 1;
458 }
459
460 void para_log(int ll, const char *fmt,...)
461 {
462 int color;
463 char *msg;
464
465 if (ll < conf.loglevel_arg || !curses_active)
466 return;
467 switch (ll) {
468 case DEBUG:
469 case INFO:
470 case NOTICE:
471 color = COLOR_MSG;
472 break;
473 default:
474 color = COLOR_ERRMSG;
475 }
476 PARA_VSPRINTF(fmt, msg);
477 chop(msg);
478 rb_add_entry(color, msg);
479 wrefresh(bot.win);
480 }
481
482 static void setup_signal_handling(void)
483 {
484 signal_pipe = para_signal_init();
485 para_install_sighandler(SIGINT);
486 para_install_sighandler(SIGTERM);
487 para_install_sighandler(SIGCHLD);
488 para_install_sighandler(SIGWINCH);
489 para_install_sighandler(SIGUSR1);
490 signal(SIGPIPE, SIG_IGN);
491 signal(SIGHUP, SIG_IGN);
492 }
493
494 static void do_exit(int ret)
495 {
496 signal(SIGTERM, SIG_IGN);
497 kill(0, SIGTERM);
498 exit(ret);
499 }
500
501 static void shutdown_curses(void)
502 {
503 if (!curses_active)
504 return;
505 def_prog_mode();
506 curses_active = 0;
507 endwin();
508 }
509
510 static void finish(int ret)
511 {
512 shutdown_curses();
513 do_exit(ret);
514 }
515
516 /*
517 * exit curses and print given message to stdout/stderr
518 */
519 __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
520 {
521 va_list argp;
522 FILE *outfd = ret? stderr: stdout;
523
524 shutdown_curses();
525 va_start(argp, fmt);
526 vfprintf(outfd, fmt, argp);
527 va_end(argp);
528 do_exit(ret);
529 }
530
531 static void print_welcome(void)
532 {
533 int ll = conf.loglevel_arg;
534 if (ll > NOTICE)
535 return;
536 outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
537 " \"" CODENAME "\". Theme: %s", theme.name);
538 wclrtoeol(bot.win);
539 }
540
541 /*
542 * init all windows
543 */
544 static void init_wins(int top_lines)
545 {
546 int i;
547
548 top.lines = top_lines;
549 top.cols = COLS;
550 top.begy = 0;
551 top.begx = 0;
552
553 bot.lines = LINES - top.lines - 3;
554 bot.cols = COLS;
555 bot.begy = top.lines + 1;
556 bot.begx = 0;
557
558 sb.lines = 1;
559 sb.cols = COLS;
560 sb.begy = LINES - 2;
561 sb.begx = 0;
562
563 in.lines = 1;
564 in.cols = COLS;
565 in.begy = LINES - 1;
566 in.begx = 0;
567
568 sep.lines = 1;
569 sep.cols = COLS;
570 sep.begy = top.lines;
571 sep.begx = 0;
572
573 assume_default_colors(theme.default_fg, theme.default_bg);
574 if (top.win) {
575 mvwin(top.win, top.begy, top.begx);
576 wresize(top.win, top.lines, top.cols);
577
578 mvwin(sb.win, sb.begy, sb.begx);
579 wresize(sb.win, sb.lines, sb.cols);
580
581 mvwin(sep.win, sep.begy, sep.begx);
582 wresize(sep.win, sep.lines, sep.cols);
583
584 mvwin(bot.win, bot.begy, bot.begx);
585 wresize(bot.win, bot.lines, bot.cols);
586
587 mvwin(in.win, in.begy, in.begx);
588 wresize(in.win, in.lines, in.cols);
589 } else {
590 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
591 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
592 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
593 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
594 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
595 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
596 msg_n_exit(1, "Error: Cannot create curses windows\n");
597 wclear(bot.win);
598 wclear(sb.win);
599 wclear(in.win);
600 scrollok(bot.win, 1);
601 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
602 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
603 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
604 wattron(top.win, COLOR_PAIR(COLOR_TOP));
605 nodelay(top.win, 1);
606 nodelay(bot.win, 1);
607 nodelay(sb.win, 1);
608 nodelay(in.win, 0);
609
610 keypad(top.win, 1);
611 keypad(bot.win, 1);
612 keypad(sb.win, 1);
613 keypad(in.win, 1);
614 print_status_bar();
615 }
616 wmove(sep.win, 0, 0);
617 for (i = 1; i <= COLS; i++)
618 waddstr(sep.win, theme.sep_str);
619 wclear(top.win);
620 //wclear(bot.win);
621 wnoutrefresh(top.win);
622 wnoutrefresh(bot.win);
623 //wnoutrefresh(sb.win);
624 print_status_bar();
625 wnoutrefresh(in.win);
626 wnoutrefresh(sep.win);
627 doupdate();
628 }
629
630 static void check_geometry(void)
631 {
632 if (LINES < theme.lines_min || COLS < theme.cols_min)
633 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
634 " (need at least %dx%d)\n", COLS, LINES,
635 theme.cols_min, theme.lines_min);
636 }
637
638 /*
639 * Print stat item #i to curses window
640 */
641 static void print_stat_item(int i)
642 {
643 char *tmp;
644 struct stat_item_data d = theme.data[i];
645 char *c = stat_content[i];
646
647 if (!curses_active || !d.len || !c)
648 return;
649 tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
650 // PARA_DEBUG_LOG("%s: read: %s\n", __func__, tmp);
651 wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
652 wrefresh(top.win);
653 wattron(top.win, COLOR_PAIR(i + 1));
654 align_str(top.win, tmp, d.len * COLS / 100, d.align);
655 free(tmp);
656 wrefresh(top.win);
657 }
658
659 static void print_all_items(void)
660 {
661 int i;
662
663 if (!curses_active)
664 return;
665 for (i = 0; i < NUM_STAT_ITEMS; i++)
666 print_stat_item(i);
667 }
668 static void clear_all_items(void)
669 {
670 int i;
671
672 for (i = 0; i < NUM_STAT_ITEMS; i++) {
673 free(stat_content[i]);
674 stat_content[i] = para_strdup("");
675 }
676 }
677
678 static void init_colors(void)
679 {
680 int i;
681 if (!has_colors())
682 msg_n_exit(EXIT_FAILURE, "Error: No color term\n");
683 start_color();
684 for (i = 0; i < NUM_STAT_ITEMS; i++)
685 if (theme.data[i].len)
686 init_pair(i + 1, theme.data[i].fg, theme.data[i].bg);
687 init_pair(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
688 init_pair(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
689 init_pair(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
690 init_pair(COLOR_MSG, theme.msg_fg, theme.msg_bg);
691 init_pair(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
692 init_pair(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
693 init_pair(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
694 init_pair(COLOR_TOP, theme.default_fg, theme.default_bg);
695 init_pair(COLOR_BOT, theme.default_fg, theme.default_bg);
696 }
697
698 /*
699 * (re-)initialize the curses library FIXME: Error checking
700 */
701 static void init_curses(void)
702 {
703 curses_active = 1;
704 if (top.win && refresh() == ERR) { /* refesh is really needed */
705 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
706 }
707 check_geometry();
708 curs_set(0); /* make cursor invisible, ignore errors */
709 // if (noraw() == ERR);
710 // msg_n_exit(EXIT_FAILURE, "can not place terminal out of "
711 // "raw mode\n");
712 nonl(); /* tell curses not to do NL->CR/NL on output */
713 noecho(); /* don't echo input */
714 cbreak(); /* take input chars one at a time, no wait for \n */
715 //reset_prog_mode();
716 init_colors();
717 clear();
718 init_wins(theme.top_lines_default);
719 print_all_items();
720 noecho(); /* don't echo input */
721 }
722
723
724 static void check_sigchld(void)
725 {
726 pid_t pid;
727 reap_next_child:
728 pid = para_reap_child();
729 if (pid <= 0)
730 return;
731 if (pid == cmd_pid) {
732 cmd_pid = 0;
733 cmd_died = 1;
734 }
735 goto reap_next_child;
736 }
737
738 /*
739 * print status line if line starts with known command.
740 */
741 static int check_stat_line(char *line, __a_unused void *data)
742 {
743 int i;
744
745 // PARA_INFO_LOG("%s: checking: %s\n", __func__, line);
746 i = stat_line_valid(line);
747 if (i >= 0) {
748 line += strlen(status_item_list[i]) + 1;
749 free(stat_content[i]);
750 stat_content[i] = para_strdup(line);
751 print_stat_item(i);
752 }
753 return 1;
754 }
755
756 /*
757 * This sucker modifies its first argument. *handler and *arg are
758 * pointers to 0-terminated strings (inside line). Crap.
759 */
760 static int split_key_map(char *line, char **handler, char **arg)
761 {
762 if (!(*handler = strchr(line + 1, ':')))
763 goto err_out;
764 **handler = '\0';
765 (*handler)++;
766 if (!(*arg = strchr(*handler, ':')))
767 goto err_out;
768 **arg = '\0';
769 (*arg)++;
770 return 1;
771 err_out:
772 return 0;
773 }
774
775 static int check_key_map_args(void)
776 {
777 char *s;
778 int i, ret = -1;
779 char *tmp = NULL, *handler, *arg;
780
781 for (i = 0; i < conf.key_map_given; ++i) {
782 s = conf.key_map_arg[i];
783 if (!(*s))
784 goto err_out;
785 free(tmp);
786 tmp = para_strdup(s);
787 if (!split_key_map(tmp, &handler, &arg))
788 goto err_out;
789 if (strlen(handler) != 1)
790 goto err_out;
791 if (*handler != 'x'
792 && *handler != 'd'
793 && *handler != 'i'
794 && *handler != 'p')
795 goto err_out;
796 if (*handler != 'i')
797 continue;
798 if (find_cmd_byname(arg) < 0)
799 goto err_out;
800 }
801 ret = 0;
802 err_out:
803 free(tmp);
804 return ret;
805 }
806
807 /*
808 * React to various signal-related events
809 */
810 static void handle_signal(int sig)
811 {
812 switch (sig) {
813 case SIGTERM:
814 msg_n_exit(EXIT_FAILURE,
815 "only the good die young (caught SIGTERM))\n");
816 return;
817 case SIGWINCH:
818 if (curses_active) {
819 shutdown_curses();
820 init_curses();
821 redraw_bot_win();
822 }
823 return;
824 case SIGINT:
825 PARA_WARNING_LOG("%s", "caught SIGINT, reset");
826 /* Nothing to do. SIGINT killed our child, para_client stat.
827 * This get noticed by do_select which resets everything
828 */
829 return;
830 case SIGUSR1:
831 PARA_NOTICE_LOG("%s", "got SIGUSR1, rereading configuration");
832 com_reread_conf();
833 return;
834 case SIGCHLD:
835 check_sigchld();
836 return;
837 }
838 }
839
840 static int open_audiod_pipe(void)
841 {
842 static int init = 1;
843
844 if (init)
845 init = 0;
846 else
847 sleep(1);
848 return para_open_audiod_pipe(conf.stat_cmd_arg);
849 }
850
851 /*
852 * This is the core select loop. Besides the (internal) signal
853 * pipe, the following other fds are checked according to the mode:
854 *
855 * GETCH_MODE: check stdin, return when key is pressed
856 *
857 * COMMAND_MODE: check command_pipe and stdin. Return when a screen full
858 * of output has been read or when other end has closed command pipe or
859 * when any key is pressed.
860 *
861 * EXTERNAL_MODE: Check only signal pipe. Used when an external command
862 * is running. During that thime curses is disabled. Returns when
863 * cmd_pid == 0.
864 */
865 static int do_select(int mode)
866 {
867 fd_set rfds;
868 int ret;
869 int max_fileno, cp_numread = 1;
870 char command_buf[4096] = "";
871 int cbo = 0; /* command buf offset */
872 struct timeval tv;
873 repeat:
874 tv.tv_sec = conf.timeout_arg / 1000;
875 tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
876 // ret = refresh_status();
877 FD_ZERO(&rfds);
878 max_fileno = 0;
879 /* audiod pipe */
880 if (audiod_pipe < 0)
881 audiod_pipe = open_audiod_pipe();
882 if (audiod_pipe >= 0)
883 para_fd_set(audiod_pipe, &rfds, &max_fileno);
884 /* signal pipe */
885 para_fd_set(signal_pipe, &rfds, &max_fileno);
886 /* command pipe only for COMMAND_MODE */
887 if (command_pipe >= 0 && mode == COMMAND_MODE)
888 para_fd_set(command_pipe, &rfds, &max_fileno);
889 ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
890 if (ret <= 0)
891 goto check_return; /* skip fd checks */
892 /* signals */
893 if (FD_ISSET(signal_pipe, &rfds)) {
894 int sig_nr = para_next_signal();
895 if (sig_nr > 0)
896 handle_signal(sig_nr);
897 }
898 /* read command pipe if ready */
899 if (command_pipe >= 0 && mode == COMMAND_MODE &&
900 FD_ISSET(command_pipe, &rfds)) {
901 cp_numread = read(command_pipe, command_buf + cbo,
902 sizeof(command_buf) - 1 - cbo);
903 if (cp_numread >= 0)
904 cbo += cp_numread;
905 else {
906 if (cp_numread < 0)
907 PARA_ERROR_LOG("read error (%d)", cp_numread);
908 close(command_pipe);
909 command_pipe = -1;
910 }
911 }
912 if (audiod_pipe >= 0 && FD_ISSET(audiod_pipe, &rfds))
913 if (read_audiod_pipe(audiod_pipe, check_stat_line) <= 0) {
914 close(audiod_pipe);
915 audiod_pipe = -1;
916 clear_all_items();
917 free(stat_content[SI_STATUS_BAR]);
918 stat_content[SI_STATUS_BAR] =
919 para_strdup("audiod not running!?");
920 print_all_items();
921 }
922 check_return:
923 switch (mode) {
924 case COMMAND_MODE:
925 if (cp_numread <= 0 && !cbo) /* command complete */
926 return 0;
927 if (cbo)
928 cbo = for_each_line(command_buf, cbo,
929 &add_output_line, NULL);
930 if (cp_numread <= 0)
931 cbo = 0;
932 wrefresh(bot.win);
933 ret = wgetch(top.win);
934 if (ret != ERR && ret != KEY_RESIZE) {
935 if (command_pipe) {
936 close(command_pipe);
937 command_pipe = -1;
938 }
939 if (cmd_pid)
940 kill(cmd_pid, SIGTERM);
941 return -1;
942 }
943 break;
944 case GETCH_MODE:
945 ret = wgetch(top.win);
946 if (ret != ERR && ret != KEY_RESIZE)
947 return ret;
948 break;
949 case EXTERNAL_MODE:
950 if (cmd_died) {
951 cmd_died = 0;
952 return 0;
953 }
954 }
955 goto repeat;
956 }
957
958 /*
959 * read from command pipe and print data to bot window
960 */
961 static int send_output(void)
962 {
963 if (command_pipe < 0)
964 return 0;
965 if (do_select(COMMAND_MODE) >= 0)
966 PARA_INFO_LOG("%s", "command complete");
967 else
968 PARA_NOTICE_LOG("%s", "command aborted");
969 print_in_bar(COLOR_MSG, " ");
970 return 1;
971 }
972
973 static int client_cmd_cmdline(char *cmd)
974 {
975 int ret, fds[3] = {0, 1, 0};
976 char *c = make_message(BINDIR "/para_client %s", cmd);
977
978 outputf(COLOR_COMMAND, "%s", c);
979 print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
980 ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
981 free(c);
982 if (ret < 0)
983 return -1;
984 command_pipe = fds[1];
985 mark_fd_nonblock(command_pipe);
986 return send_output();
987 }
988
989 /*
990 * exec command and print output to bot win
991 */
992 static int display_cmd(char *cmd)
993 {
994 int fds[3] = {0, 1, 0};
995
996 print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
997 outputf(COLOR_COMMAND, "%s", cmd);
998 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
999 return -1;
1000 command_pipe = fds[1];
1001 mark_fd_nonblock(command_pipe);
1002 return send_output();
1003 }
1004
1005 /*
1006 * shutdown curses and stat pipe before executing external commands
1007 */
1008 static int external_cmd(char *cmd)
1009 {
1010 int fds[3] = {-1, -1, -1};
1011
1012 if (cmd_pid)
1013 return -1;
1014 shutdown_curses();
1015 para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1016 cmd_died = 0;
1017 do_select(EXTERNAL_MODE);
1018 init_curses();
1019 return 0;
1020 }
1021
1022 static void print_scroll_msg(void)
1023 {
1024 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1025 int first_rbe = first_visible_rbe(&lines_total);
1026 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1027 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1028 }
1029
1030 static void com_page_down(void)
1031 {
1032 unsigned lines = 0;
1033 int i = scroll_position;
1034 while (lines < bot.lines && --i > 0) {
1035 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1036 if (!rbe)
1037 break;
1038 lines += NUM_LINES(strlen(rbe->msg));
1039 }
1040 if (lines) {
1041 scroll_position = i;
1042 redraw_bot_win();
1043 print_scroll_msg();
1044 return;
1045 }
1046 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1047 }
1048
1049 static void com_page_up(void)
1050 {
1051 unsigned lines;
1052 int fvr = first_visible_rbe(&lines);
1053 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1054 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1055 return;
1056 }
1057 scroll_position = fvr + 1;
1058 for (; scroll_position > 0; scroll_position--) {
1059 fvr = first_visible_rbe(&lines);
1060 if (lines == bot.lines)
1061 break;
1062 }
1063 redraw_bot_win();
1064 print_scroll_msg();
1065 }
1066
1067 static void com_scroll_down(void)
1068 {
1069 struct rb_entry *rbe;
1070 int rbe_lines;
1071
1072 if (!scroll_position) {
1073 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1074 return;
1075 }
1076 scroll_position--;
1077 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1078 rbe_lines = NUM_LINES(rbe->len);
1079 wscrl(bot.win, rbe_lines);
1080 wmove(bot.win, bot.lines - rbe_lines, 0);
1081 wattron(bot.win, COLOR_PAIR(rbe->color));
1082 waddstr(bot.win, rbe->msg);
1083 wrefresh(bot.win);
1084 print_scroll_msg();
1085 }
1086
1087 static void com_scroll_up(void)
1088 {
1089 struct rb_entry *rbe = NULL;
1090 unsigned lines;
1091 int i, first_rbe, num_scroll;
1092
1093 /* the entry that is going to vanish */
1094 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1095 if (!rbe)
1096 goto err_out;
1097 num_scroll = NUM_LINES(rbe->len);
1098 first_rbe = first_visible_rbe(&lines);
1099 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1100 goto err_out;
1101 scroll_position++;
1102 wscrl(bot.win, -num_scroll);
1103 i = draw_top_rbe(&lines);
1104 if (i < 0)
1105 goto err_out;
1106 while (i > 0 && lines < num_scroll) {
1107 int rbe_lines;
1108 rbe = ringbuffer_get(bot_win_rb, --i);
1109 if (!rbe)
1110 break;
1111 rbe_lines = NUM_LINES(rbe->len);
1112 lines += rbe_lines;
1113 // fprintf(stderr, "msg: %s\n", rbe->msg);
1114 wattron(bot.win, COLOR_PAIR(rbe->color));
1115 waddstr(bot.win, "\n");
1116 waddstr(bot.win, rbe->msg);
1117 if (!i)
1118 break;
1119 i--;
1120 }
1121 wrefresh(bot.win);
1122 print_scroll_msg();
1123 return;
1124 err_out:
1125 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1126 }
1127
1128 static void com_ll_decr(void)
1129 {
1130 if (conf.loglevel_arg <= DEBUG) {
1131 print_in_bar(COLOR_ERRMSG,
1132 "loglevel already at maximal verbosity\n");
1133 return;
1134 }
1135 conf.loglevel_arg--;
1136 print_in_bar(COLOR_MSG, "loglevel set to %d\n", conf.loglevel_arg);
1137 }
1138
1139 static void com_ll_incr(void)
1140 {
1141 if (conf.loglevel_arg >= EMERG) {
1142 print_in_bar(COLOR_ERRMSG,
1143 "loglevel already at miminal verbosity\n");
1144 return;
1145 }
1146 conf.loglevel_arg++;
1147 print_in_bar(COLOR_MSG, "loglevel set to %d\n", conf.loglevel_arg);
1148 }
1149
1150 /*
1151 * reread configuration, terminate on errors
1152 */
1153 static void com_reread_conf(void)
1154 {
1155 char *cf =configfile_exists();
1156 struct gui_cmdline_parser_params params = {
1157 .override = 1,
1158 .initialize = 1,
1159 .check_required = 0,
1160 .check_ambiguity = 0
1161 };
1162
1163 if (!cf) {
1164 PARA_WARNING_LOG("%s", "there is no configuration to read");
1165 return;
1166 }
1167 PARA_INFO_LOG("%s", "rereading command line options and config file");
1168 gui_cmdline_parser(_argc, _argv, &conf);
1169 gui_cmdline_parser_config_file(cf, &conf, &params);
1170 PARA_NOTICE_LOG("%s", "config file reloaded");
1171 if (check_key_map_args() < 0)
1172 finish(EXIT_FAILURE);
1173 }
1174
1175 static void com_help(void)
1176 {
1177 int i;
1178
1179 for (i = 0; i < conf.key_map_given; ++i) {
1180 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1181 const char *handler_text = "???", *desc = NULL;
1182
1183 if (!split_key_map(tmp, &handler, &arg)) {
1184 free(tmp);
1185 return;
1186 }
1187 switch (*handler) {
1188 case 'i':
1189 handler_text = "internal";
1190 desc = command_list[find_cmd_byname(arg)].description;
1191 break;
1192 case 'x': handler_text = "external"; break;
1193 case 'd': handler_text = "display "; break;
1194 case 'p': handler_text = "para "; break;
1195 }
1196 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1197 strlen(arg) < 8? "\t" : "",
1198 desc? desc : "");
1199 free(tmp);
1200 }
1201 for (i = 0; command_list[i].handler; i++) {
1202 struct gui_command gc = command_list[i];
1203
1204 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1205 strlen(gc.name) < 8? "\t" : "",
1206 gc.description);
1207 }
1208 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1209 "for more info");
1210 }
1211
1212 static void com_shrink_top_win(void)
1213 {
1214 if (top.lines <= theme.top_lines_min) {
1215 PARA_WARNING_LOG("%s", "can not decrease top window");
1216 return;
1217 }
1218 init_wins(top.lines - 1);
1219 wclear(top.win);
1220 print_all_items();
1221 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1222 }
1223
1224 static void com_enlarge_top_win(void)
1225 {
1226 if (bot.lines < 3) {
1227 PARA_WARNING_LOG("%s", "can not increase top window");
1228 return;
1229 }
1230 init_wins(top.lines + 1);
1231 wclear(top.win);
1232 print_all_items();
1233 print_in_bar(COLOR_MSG, "increased top window");
1234 }
1235
1236 static void com_version(void)
1237 {
1238 print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1239 CODENAME "\"");
1240 }
1241
1242 static void com_quit(void)
1243 {
1244 finish(0);
1245 }
1246
1247 static void com_refresh(void)
1248 {
1249 shutdown_curses();
1250 init_curses();
1251 }
1252
1253 static void change_theme(int next)
1254 {
1255 if (next)
1256 next_theme(&theme);
1257 else
1258 prev_theme(&theme);
1259 /* This seems to be needed twice, why? */
1260 com_refresh();
1261 com_refresh();
1262 PARA_NOTICE_LOG("new theme: %s", theme.name);
1263 }
1264
1265 static void com_next_theme(void)
1266 {
1267 change_theme(1);
1268 }
1269
1270 static void com_prev_theme(void)
1271 {
1272 change_theme(0);
1273 }
1274
1275
1276 static void handle_command(int c)
1277 {
1278 int i;
1279
1280 /* first check user's key bindings */
1281 for (i = 0; i < conf.key_map_given; ++i) {
1282 char tmp[MAXLINE], *handler, *arg;
1283
1284 strcpy(tmp, conf.key_map_arg[i]);
1285 if (!split_key_map(tmp, &handler, &arg))
1286 return;
1287 if (!strcmp(tmp, km_keyname(c))) {
1288 if (*handler == 'd') {
1289 display_cmd(arg);
1290 return;
1291 }
1292 if (*handler == 'x') {
1293 external_cmd(arg);
1294 return;
1295 }
1296 if (*handler == 'p') {
1297 client_cmd_cmdline(arg);
1298 return;
1299 }
1300 if (*handler == 'i') {
1301 int num = find_cmd_byname(arg);
1302 if (num >= 0)
1303 command_list[num].handler();
1304 return;
1305 }
1306 }
1307 }
1308 /* not found, check internal key bindings */
1309 for (i = 0; command_list[i].handler; i++) {
1310 if (!strcmp(km_keyname(c), command_list[i].key)) {
1311 command_list[i].handler();
1312 return;
1313 }
1314 }
1315 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1316 km_keyname(c));
1317 }
1318
1319 int main(int argc, char *argv[])
1320 {
1321 int ret;
1322 char *cf;
1323
1324 _argc = argc;
1325 _argv = argv;
1326
1327 if (gui_cmdline_parser(argc, argv, &conf)) {
1328 fprintf(stderr, "parse error while reading command line\n");
1329 exit(EXIT_FAILURE);
1330 }
1331 HANDLE_VERSION_FLAG("gui", conf);
1332 init_theme(0, &theme);
1333 top.lines = theme.top_lines_default;
1334 if (check_key_map_args() < 0) {
1335 fprintf(stderr, "invalid key map\n");
1336 exit(EXIT_FAILURE);
1337 }
1338 cf = configfile_exists();
1339 if (!cf && conf.config_file_given) {
1340 fprintf(stderr, "can not read config file %s\n",
1341 conf.config_file_arg);
1342 exit(EXIT_FAILURE);
1343 }
1344 if (cf) {
1345 struct gui_cmdline_parser_params params = {
1346 .override = 0,
1347 .initialize = 0,
1348 .check_required = 0,
1349 .check_ambiguity = 0
1350 };
1351 gui_cmdline_parser_config_file(cf, &conf, &params);
1352 }
1353 if (check_key_map_args() < 0) {
1354 fprintf(stderr, "invalid key map in config file\n");
1355 exit(EXIT_FAILURE);
1356 }
1357 setup_signal_handling();
1358 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1359 initscr(); /* needed only once, always successful */
1360 init_curses();
1361 print_welcome();
1362 for (;;) {
1363 print_status_bar();
1364 ret = do_select(GETCH_MODE);
1365 if (!ret)
1366 continue;
1367 print_in_bar(COLOR_MSG, " ");
1368 handle_command(ret);
1369 }
1370 }