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