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