Pass full argument list to mood parsers.
[paraslash.git] / gui.c
1 /*
2 * Copyright (C) 1998-2009 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file gui.c Curses-based interface for paraslash. */
8
9 #include <signal.h>
10 #include <sys/types.h>
11 #include <dirent.h>
12 #include "gui.cmdline.h"
13 #include "para.h"
14 #include "gui.h"
15 #include "string.h"
16 #include <curses.h>
17 #include "ringbuffer.h"
18 #include "fd.h"
19 #include "error.h"
20 #include "list.h"
21 #include "sched.h"
22 #include "signal.h"
23
24 /** define the array of error lists needed by para_gui */
25 INIT_GUI_ERRLISTS;
26 static char *stat_content[NUM_STAT_ITEMS];
27
28 #define STANDARD_STATUS_BAR "para_gui " PACKAGE_VERSION " (hit ? for help)"
29
30 static int signal_pipe;
31
32 static struct win_data {
33 WINDOW *win;
34 NCURSES_SIZE_T begx;
35 NCURSES_SIZE_T begy;
36 NCURSES_SIZE_T cols;
37 NCURSES_SIZE_T lines;
38 } top, bot, sb, in, sep;
39
40 #define RINGBUFFER_SIZE 512
41 struct rb_entry {
42 char *msg;
43 size_t len;
44 int color;
45 };
46 struct ringbuffer *bot_win_rb;
47 #define NUM_LINES(len) (1 + (len) / bot.cols)
48
49 static unsigned scroll_position;
50
51 static int cmd_died, curses_active;
52 static pid_t cmd_pid;
53
54 static int command_pipe = -1;
55 static int audiod_pipe = -1;
56 static struct gui_args_info conf;
57
58 enum {GETCH_MODE, COMMAND_MODE, EXTERNAL_MODE};
59
60
61 #define COLOR_STATUSBAR 52
62 #define COLOR_COMMAND 53
63 #define COLOR_OUTPUT 54
64 #define COLOR_MSG 55
65 #define COLOR_ERRMSG 56
66 #define COLOR_WELCOME 57
67 #define COLOR_SEPARATOR 58
68 #define COLOR_TOP 59
69 #define COLOR_BOT 60
70
71 struct gui_command {
72 const char *key;
73 const char *name;
74 const char *description;
75 void (*handler)(void);
76 };
77
78 struct stat_item {
79 char name[MAXLINE];
80 char prefix[MAXLINE];
81 char postfix[MAXLINE];
82 unsigned y;
83 unsigned x;
84 unsigned len;
85 int fg, bg;
86 int align;
87 char content[MAXLINE];
88 };
89
90 static struct gui_theme theme;
91
92 int _argc;
93 char **_argv;
94
95 static void com_help(void);
96 static void com_reread_conf(void);
97 static void com_enlarge_top_win(void);
98 static void com_shrink_top_win(void);
99 static void com_version(void);
100 static void com_quit(void);
101 static void com_refresh(void);
102 static void com_ll_incr(void);
103 static void com_ll_decr(void);
104 static void com_prev_theme(void);
105 static void com_next_theme(void);
106 static void com_scroll_up(void);
107 static void com_scroll_down(void);
108 static void com_page_up(void);
109 static void com_page_down(void);
110
111 struct gui_command command_list[] = {
112 {
113 .key = "?",
114 .name = "help",
115 .description = "print help",
116 .handler = com_help
117 }, {
118 .key = "+",
119 .name = "enlarge_win",
120 .description = "enlarge the top window",
121 .handler = com_enlarge_top_win
122 }, {
123 .key = "-",
124 .name = "shrink_win",
125 .description = "shrink the top window",
126 .handler = com_shrink_top_win
127 }, {
128 .key = "r",
129 .name = "reread_conf",
130 .description = "reread configuration file",
131 .handler = com_reread_conf
132 }, {
133 .key = "q",
134 .name = "quit",
135 .description = "exit para_gui",
136 .handler = com_quit
137 }, {
138 .key = "^L",
139 .name = "refresh",
140 .description = "redraw the screen",
141 .handler = com_refresh
142 }, {
143 .key = ".",
144 .name = "next_theme",
145 .description = "switch to next theme",
146 .handler = com_next_theme
147 }, {
148 .key = ",",
149 .name = "prev_theme",
150 .description = "switch to previous stream",
151 .handler = com_prev_theme
152 }, {
153 .key = ">",
154 .name = "ll_incr",
155 .description = "increase loglevel (decreases verbosity)",
156 .handler = com_ll_incr
157 }, {
158 .key = "<",
159 .name = "ll_decr",
160 .description = "decrease loglevel (increases verbosity)",
161 .handler = com_ll_decr
162 }, {
163 .key = "V",
164 .name = "version",
165 .description = "show the para_gui version",
166 .handler = com_version
167 }, {
168 .key = "<up>",
169 .name = "scroll_up",
170 .description = "scroll up one line",
171 .handler = com_scroll_up
172 }, {
173 .key = "<down>",
174 .name = "scroll_down",
175 .description = "scroll down one line",
176 .handler = com_scroll_down
177 }, {
178 .key = "<ppage>",
179 .name = "page_up",
180 .description = "scroll up one page",
181 .handler = com_page_up
182 }, {
183 .key = "<npage>",
184 .name = "page_down",
185 .description = "scroll down one page",
186 .handler = com_page_down
187 }, {
188 .handler = NULL
189 }
190 };
191
192 static int para_open_audiod_pipe(char *cmd)
193 {
194 int fds[3] = {0, 1, 0};
195 pid_t pid;
196 int ret = para_exec_cmdline_pid(&pid, cmd, fds);
197 if (ret < 0)
198 return ret;
199 ret = mark_fd_nonblocking(fds[1]);
200 if (ret > 0)
201 return fds[1];
202 close(fds[1]);
203 return ret;
204 }
205
206 static int find_cmd_byname(char *name)
207 {
208 int i;
209
210 for (i = 0; command_list[i].handler; i++)
211 if (!strcmp(command_list[i].name, name))
212 return i;
213 return -1;
214 }
215
216 /* taken from mutt */
217 static char *km_keyname(int c)
218 {
219 static char buf[10];
220
221 if (c == KEY_UP) {
222 sprintf(buf, "<up>");
223 return buf;
224 }
225 if (c == KEY_DOWN) {
226 sprintf(buf, "<down>");
227 return buf;
228 }
229 if (c == KEY_LEFT) {
230 sprintf(buf, "<left>");
231 return buf;
232 }
233 if (c == KEY_RIGHT) {
234 sprintf(buf, "<right>");
235 return buf;
236 }
237 if (c == KEY_NPAGE) {
238 sprintf(buf, "<npage>");
239 return buf;
240 }
241 if (c == KEY_PPAGE) {
242 sprintf(buf, "<ppage>");
243 return buf;
244 }
245 if (c < 256 && c > -128 && iscntrl((unsigned char) c)) {
246 if (c < 0)
247 c += 256;
248 if (c < 128) {
249 buf[0] = '^';
250 buf[1] = (c + '@') & 0x7f;
251 buf[2] = 0;
252 } else
253 snprintf(buf, sizeof(buf), "\\%d%d%d", c >> 6,
254 (c >> 3) & 7, c & 7);
255 } else if (c >= KEY_F0 && c < KEY_F(256))
256 sprintf(buf, "<F%d>", c - KEY_F0);
257 else if (isprint(c))
258 snprintf(buf, sizeof(buf), "%c", (unsigned char) c);
259 else
260 snprintf(buf, sizeof(buf), "\\x%hx", (unsigned short) c);
261 return buf;
262 }
263
264 static char *configfile_exists(void)
265 {
266 static char *config_file;
267 char *tmp;
268
269 if (!conf.config_file_given) {
270 if (!config_file) {
271 char *home = para_homedir();
272 config_file = make_message("%s/.paraslash/gui.conf",
273 home);
274 free(home);
275 }
276 tmp = config_file;
277 } else
278 tmp = conf.config_file_arg;
279 return file_exists(tmp)? tmp: NULL;
280 }
281
282 /*
283 * print num spaces to curses window
284 */
285 static void add_spaces(WINDOW* win, unsigned int num)
286 {
287 while (num > 0) {
288 num--;
289 waddstr(win, " ");
290 }
291 }
292
293 /*
294 * print aligned string to curses window. This function always prints
295 * exactly len chars.
296 */
297 static int align_str(WINDOW* win, char *str, unsigned int len,
298 unsigned int align)
299 {
300 int i, num; /* of spaces */
301
302 if (!win || !str)
303 return -1;
304 num = len - strlen(str);
305 if (num < 0) {
306 str[len] = '\0';
307 num = 0;
308 }
309 /* replace newlines by spaces */
310 for (i = 0; i < len; i++) {
311 if (str[i] == '\n')
312 str[i] = ' ';
313 }
314 if (align == LEFT) {
315 waddstr(win, str);
316 add_spaces(win, num);
317 } else if (align == RIGHT) {
318 add_spaces(win, num);
319 waddstr(win, str);
320 } else {
321 add_spaces(win, num / 2);
322 waddstr(win, str[0]? str: "");
323 add_spaces(win, num - num / 2);
324 }
325 return 1;
326 }
327
328 __printf_2_3 static void print_in_bar(int color, const char *fmt,...)
329 {
330 char *msg;
331
332 if (!curses_active)
333 return;
334 wattron(in.win, COLOR_PAIR(color));
335 PARA_VSPRINTF(fmt, msg);
336 wmove(in.win, 0, 0);
337 align_str(in.win, msg, sb.cols, LEFT);
338 free(msg);
339 wrefresh(in.win);
340 }
341
342 /*
343 * update the status bar
344 */
345 static void print_status_bar(void)
346 {
347 char *tmp;
348
349 if (!curses_active)
350 return;
351 tmp = para_strdup(STANDARD_STATUS_BAR);
352 wmove(sb.win, 0, 0);
353 align_str(sb.win, tmp, sb.cols, CENTER);
354 free(tmp);
355 wrefresh(sb.win);
356 }
357
358 /*
359 * get the number of the oldest rbe that is (partially) visible. On return,
360 * lines contains the sum of the number of lines of all visable entries. If the
361 * first one is only partially visible, lines is greater than bot.lines.
362 */
363 static int first_visible_rbe(unsigned *lines)
364 {
365 int i;
366 *lines = 0;
367 for (i = scroll_position; i < RINGBUFFER_SIZE; i++) {
368 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
369 int rbe_lines;
370 if (!rbe)
371 return i - 1;
372 // fprintf(stderr, "found: %s\n", rbe->msg);
373 rbe_lines = NUM_LINES(rbe->len);
374 if (rbe_lines > bot.lines)
375 return -1;
376 *lines += rbe_lines;
377 if (*lines >= bot.lines)
378 return i;
379 }
380 return RINGBUFFER_SIZE - 1;
381 }
382
383 static int draw_top_rbe(unsigned *lines)
384 {
385 unsigned len;
386 int offset, fvr = first_visible_rbe(lines);
387 struct rb_entry *rbe;
388
389 if (fvr < 0)
390 return -1;
391 wmove(bot.win, 0, 0);
392 rbe = ringbuffer_get(bot_win_rb, fvr);
393 if (!rbe)
394 return -1;
395 /* first rbe might be only partially visible */
396 offset = (*lines - bot.lines) * bot.cols;
397 len = strlen(rbe->msg);
398 if (offset < 0 || len < offset)
399 return -1;
400 wattron(bot.win, COLOR_PAIR(rbe->color));
401 waddstr(bot.win, rbe->msg + offset);
402 *lines = NUM_LINES(len - offset);
403 return fvr;
404 }
405
406 static void redraw_bot_win(void)
407 {
408 unsigned lines;
409 int i;
410
411 wmove(bot.win, 0, 0);
412 wclear(bot.win);
413 i = draw_top_rbe(&lines);
414 if (i <= 0)
415 goto out;
416 while (i > 0 && lines < bot.lines) {
417 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, --i);
418 if (!rbe) {
419 lines++;
420 waddstr(bot.win, "\n");
421 continue;
422 }
423 lines += NUM_LINES(rbe->len);
424 wattron(bot.win, COLOR_PAIR(rbe->color));
425 waddstr(bot.win, "\n");
426 waddstr(bot.win, rbe->msg);
427 }
428 out:
429 wrefresh(bot.win);
430 }
431
432 static void rb_add_entry(int color, char *msg)
433 {
434 struct rb_entry *old, *new = para_malloc(sizeof(struct rb_entry));
435 int x, y;
436 new->color = color;
437 new->len = strlen(msg);
438 new->msg = msg;
439 old = ringbuffer_add(bot_win_rb, new);
440 // fprintf(stderr, "added: %s\n", new->msg);
441 if (old) {
442 free(old->msg);
443 free(old);
444 }
445 if (scroll_position) {
446 /* discard current scrolling, like xterm does */
447 scroll_position = 0;
448 redraw_bot_win();
449 return;
450 }
451 wattron(bot.win, COLOR_PAIR(color));
452 getyx(bot.win, y, x);
453 if (y || x)
454 waddstr(bot.win, "\n");
455 waddstr(bot.win, msg);
456 }
457
458 /*
459 * print formated output to bot win and refresh
460 */
461 __printf_2_3 static void outputf(int color, const char* fmt,...)
462 {
463 char *msg;
464
465 if (!curses_active)
466 return;
467 PARA_VSPRINTF(fmt, msg);
468 rb_add_entry(color, msg);
469 wrefresh(bot.win);
470 }
471
472 static int add_output_line(char *line, __a_unused void *data)
473 {
474 if (!curses_active)
475 return 1;
476 rb_add_entry(COLOR_OUTPUT, para_strdup(line));
477 return 1;
478 }
479
480 static int loglevel;
481
482 __printf_2_3 void para_log(int ll, const char *fmt,...)
483 {
484 int color;
485 char *msg;
486
487 if (ll < loglevel || !curses_active)
488 return;
489 switch (ll) {
490 case LL_DEBUG:
491 case LL_INFO:
492 case LL_NOTICE:
493 color = COLOR_MSG;
494 break;
495 default:
496 color = COLOR_ERRMSG;
497 }
498 PARA_VSPRINTF(fmt, msg);
499 chop(msg);
500 rb_add_entry(color, msg);
501 wrefresh(bot.win);
502 }
503
504 static void setup_signal_handling(void)
505 {
506 signal_pipe = para_signal_init();
507 para_install_sighandler(SIGINT);
508 para_install_sighandler(SIGTERM);
509 para_install_sighandler(SIGCHLD);
510 para_install_sighandler(SIGWINCH);
511 para_install_sighandler(SIGUSR1);
512 para_sigaction(SIGHUP, SIG_IGN);
513 }
514
515 __noreturn static void do_exit(int ret)
516 {
517 para_sigaction(SIGTERM, SIG_IGN);
518 kill(0, SIGTERM);
519 exit(ret);
520 }
521
522 static void shutdown_curses(void)
523 {
524 if (!curses_active)
525 return;
526 def_prog_mode();
527 curses_active = 0;
528 endwin();
529 }
530
531 __noreturn static void finish(int ret)
532 {
533 shutdown_curses();
534 do_exit(ret);
535 }
536
537 /*
538 * exit curses and print given message to stdout/stderr
539 */
540 __noreturn __printf_2_3 static void msg_n_exit(int ret, const char* fmt, ...)
541 {
542 va_list argp;
543 FILE *outfd = ret? stderr: stdout;
544
545 shutdown_curses();
546 va_start(argp, fmt);
547 vfprintf(outfd, fmt, argp);
548 va_end(argp);
549 do_exit(ret);
550 }
551
552 static void print_welcome(void)
553 {
554 if (loglevel > LL_NOTICE)
555 return;
556 outputf(COLOR_WELCOME, "Welcome to para_gui " PACKAGE_VERSION
557 " \"" CODENAME "\". Theme: %s", theme.name);
558 wclrtoeol(bot.win);
559 }
560
561 /*
562 * init all windows
563 */
564 static void init_wins(int top_lines)
565 {
566 int i;
567
568 top.lines = top_lines;
569 top.cols = COLS;
570 top.begy = 0;
571 top.begx = 0;
572
573 bot.lines = LINES - top.lines - 3;
574 bot.cols = COLS;
575 bot.begy = top.lines + 1;
576 bot.begx = 0;
577
578 sb.lines = 1;
579 sb.cols = COLS;
580 sb.begy = LINES - 2;
581 sb.begx = 0;
582
583 in.lines = 1;
584 in.cols = COLS;
585 in.begy = LINES - 1;
586 in.begx = 0;
587
588 sep.lines = 1;
589 sep.cols = COLS;
590 sep.begy = top.lines;
591 sep.begx = 0;
592
593 assume_default_colors(theme.default_fg, theme.default_bg);
594 if (top.win) {
595 mvwin(top.win, top.begy, top.begx);
596 wresize(top.win, top.lines, top.cols);
597
598 mvwin(sb.win, sb.begy, sb.begx);
599 wresize(sb.win, sb.lines, sb.cols);
600
601 mvwin(sep.win, sep.begy, sep.begx);
602 wresize(sep.win, sep.lines, sep.cols);
603
604 mvwin(bot.win, bot.begy, bot.begx);
605 wresize(bot.win, bot.lines, bot.cols);
606
607 mvwin(in.win, in.begy, in.begx);
608 wresize(in.win, in.lines, in.cols);
609 } else {
610 sep.win = newwin(sep.lines, sep.cols, sep.begy, sep.begx);
611 top.win = newwin(top.lines, top.cols, top.begy, top.begx);
612 bot.win = newwin(bot.lines, bot.cols, bot.begy, bot.begx);
613 sb.win = newwin(sb.lines, sb.cols, sb.begy, sb.begx);
614 in.win = newwin(in.lines, in.cols, in.begy, in.begx);
615 if (!top.win || !bot.win || !sb.win || !in.win || !sep.win)
616 msg_n_exit(1, "Error: Cannot create curses windows\n");
617 wclear(bot.win);
618 wclear(sb.win);
619 wclear(in.win);
620 scrollok(bot.win, 1);
621 wattron(sb.win, COLOR_PAIR(COLOR_STATUSBAR));
622 wattron(sep.win, COLOR_PAIR(COLOR_SEPARATOR));
623 wattron(bot.win, COLOR_PAIR(COLOR_BOT));
624 wattron(top.win, COLOR_PAIR(COLOR_TOP));
625 nodelay(top.win, 1);
626 nodelay(bot.win, 1);
627 nodelay(sb.win, 1);
628 nodelay(in.win, 0);
629
630 keypad(top.win, 1);
631 keypad(bot.win, 1);
632 keypad(sb.win, 1);
633 keypad(in.win, 1);
634 print_status_bar();
635 }
636 wmove(sep.win, 0, 0);
637 for (i = 1; i <= COLS; i++)
638 waddstr(sep.win, theme.sep_str);
639 wclear(top.win);
640 //wclear(bot.win);
641 wnoutrefresh(top.win);
642 wnoutrefresh(bot.win);
643 //wnoutrefresh(sb.win);
644 print_status_bar();
645 wnoutrefresh(in.win);
646 wnoutrefresh(sep.win);
647 doupdate();
648 }
649
650 static void check_geometry(void)
651 {
652 if (LINES < theme.lines_min || COLS < theme.cols_min)
653 msg_n_exit(EXIT_FAILURE, "Error: Terminal (%dx%d) too small"
654 " (need at least %dx%d)\n", COLS, LINES,
655 theme.cols_min, theme.lines_min);
656 }
657
658 /*
659 * Print stat item #i to curses window
660 */
661 static void print_stat_item(int i)
662 {
663 char *tmp;
664 struct stat_item_data d = theme.data[i];
665 char *c = stat_content[i];
666
667 if (!curses_active || !d.len || !c)
668 return;
669 tmp = make_message("%s%s%s", d.prefix, c, d.postfix);
670 wmove(top.win, d.y * top.lines / 100, d.x * COLS / 100);
671 wrefresh(top.win);
672 wattron(top.win, COLOR_PAIR(i + 1));
673 align_str(top.win, tmp, d.len * COLS / 100, d.align);
674 free(tmp);
675 wrefresh(top.win);
676 }
677
678 static int update_item(int item_num, char *buf)
679 {
680 free(stat_content[item_num]);
681 stat_content[item_num] = para_strdup(buf);
682 print_stat_item(item_num);
683 return 1;
684 }
685
686 static int read_audiod_pipe(int fd)
687 {
688 static char *buf;
689 static int bufsize, loaded;
690 int ret;
691
692 if (loaded >= bufsize) {
693 if (bufsize > 1000 * 1000) {
694 loaded = 0;
695 return 0;
696 }
697 bufsize += bufsize + 1000;
698 buf = para_realloc(buf, bufsize);
699 }
700 assert(loaded < bufsize);
701 ret = read(fd, buf + loaded, bufsize - loaded);
702 if (ret <= 0)
703 return ret;
704 loaded += ret;
705 ret = for_each_stat_item(buf, loaded, update_item);
706 if (ret < 0)
707 return ret;
708 loaded = ret;
709 return 1;
710 }
711
712 static void print_all_items(void)
713 {
714 int i;
715
716 if (!curses_active)
717 return;
718 FOR_EACH_STATUS_ITEM(i)
719 print_stat_item(i);
720 }
721
722 static void clear_all_items(void)
723 {
724 int i;
725
726 FOR_EACH_STATUS_ITEM(i) {
727 free(stat_content[i]);
728 stat_content[i] = para_strdup("");
729 }
730 }
731
732 static void init_colors(void)
733 {
734 int i;
735
736 if (!has_colors())
737 msg_n_exit(EXIT_FAILURE, "Error: No color term\n");
738 start_color();
739 FOR_EACH_STATUS_ITEM(i)
740 if (theme.data[i].len)
741 init_pair(i + 1, theme.data[i].fg, theme.data[i].bg);
742 init_pair(COLOR_STATUSBAR, theme.sb_fg, theme.sb_bg);
743 init_pair(COLOR_COMMAND, theme.cmd_fg, theme.cmd_bg);
744 init_pair(COLOR_OUTPUT, theme.output_fg, theme.output_bg);
745 init_pair(COLOR_MSG, theme.msg_fg, theme.msg_bg);
746 init_pair(COLOR_ERRMSG, theme.err_msg_fg, theme.err_msg_bg);
747 init_pair(COLOR_WELCOME, theme.welcome_fg, theme.welcome_bg);
748 init_pair(COLOR_SEPARATOR, theme.sep_fg, theme.sep_bg);
749 init_pair(COLOR_TOP, theme.default_fg, theme.default_bg);
750 init_pair(COLOR_BOT, theme.default_fg, theme.default_bg);
751 }
752
753 /*
754 * (re-)initialize the curses library FIXME: Error checking
755 */
756 static void init_curses(void)
757 {
758 curses_active = 1;
759 if (top.win && refresh() == ERR) { /* refesh is really needed */
760 msg_n_exit(EXIT_FAILURE, "refresh() failed\n");
761 }
762 check_geometry();
763 curs_set(0); /* make cursor invisible, ignore errors */
764 // if (noraw() == ERR);
765 // msg_n_exit(EXIT_FAILURE, "can not place terminal out of "
766 // "raw mode\n");
767 nonl(); /* tell curses not to do NL->CR/NL on output */
768 noecho(); /* don't echo input */
769 cbreak(); /* take input chars one at a time, no wait for \n */
770 //reset_prog_mode();
771 init_colors();
772 clear();
773 init_wins(theme.top_lines_default);
774 print_all_items();
775 noecho(); /* don't echo input */
776 }
777
778
779 static void check_sigchld(void)
780 {
781 int ret;
782 pid_t pid;
783 reap_next_child:
784 ret = para_reap_child(&pid);
785 if (ret <= 0)
786 return;
787 if (pid == cmd_pid) {
788 cmd_pid = 0;
789 cmd_died = 1;
790 }
791 goto reap_next_child;
792 }
793
794 /*
795 * This sucker modifies its first argument. *handler and *arg are
796 * pointers to 0-terminated strings (inside line). Crap.
797 */
798 static int split_key_map(char *line, char **handler, char **arg)
799 {
800 if (!(*handler = strchr(line + 1, ':')))
801 goto err_out;
802 **handler = '\0';
803 (*handler)++;
804 if (!(*arg = strchr(*handler, ':')))
805 goto err_out;
806 **arg = '\0';
807 (*arg)++;
808 return 1;
809 err_out:
810 return 0;
811 }
812
813 static int check_key_map_args(void)
814 {
815 char *s;
816 int i, ret = -1;
817 char *tmp = NULL, *handler, *arg;
818
819 for (i = 0; i < conf.key_map_given; ++i) {
820 s = conf.key_map_arg[i];
821 if (!(*s))
822 goto err_out;
823 free(tmp);
824 tmp = para_strdup(s);
825 if (!split_key_map(tmp, &handler, &arg))
826 goto err_out;
827 if (strlen(handler) != 1)
828 goto err_out;
829 if (*handler != 'x'
830 && *handler != 'd'
831 && *handler != 'i'
832 && *handler != 'p')
833 goto err_out;
834 if (*handler != 'i')
835 continue;
836 if (find_cmd_byname(arg) < 0)
837 goto err_out;
838 }
839 ret = 0;
840 err_out:
841 free(tmp);
842 return ret;
843 }
844
845 /*
846 * React to various signal-related events
847 */
848 static void handle_signal(int sig)
849 {
850 switch (sig) {
851 case SIGTERM:
852 msg_n_exit(EXIT_FAILURE,
853 "only the good die young (caught SIGTERM))\n");
854 return;
855 case SIGWINCH:
856 if (curses_active) {
857 shutdown_curses();
858 init_curses();
859 redraw_bot_win();
860 }
861 return;
862 case SIGINT:
863 PARA_WARNING_LOG("caught SIGINT, reset");
864 /* Nothing to do. SIGINT killed our child which gets noticed
865 * by do_select and resets everything.
866 */
867 return;
868 case SIGUSR1:
869 PARA_NOTICE_LOG("got SIGUSR1, rereading configuration");
870 com_reread_conf();
871 return;
872 case SIGCHLD:
873 check_sigchld();
874 return;
875 }
876 }
877
878 static int open_audiod_pipe(void)
879 {
880 static int init = 1;
881
882 if (init)
883 init = 0;
884 else
885 sleep(1);
886 return para_open_audiod_pipe(conf.stat_cmd_arg);
887 }
888
889 /*
890 * This is the core select loop. Besides the (internal) signal
891 * pipe, the following other fds are checked according to the mode:
892 *
893 * GETCH_MODE: check stdin, return when key is pressed
894 *
895 * COMMAND_MODE: check command_pipe and stdin. Return when a screen full
896 * of output has been read or when other end has closed command pipe or
897 * when any key is pressed.
898 *
899 * EXTERNAL_MODE: Check only signal pipe. Used when an external command
900 * is running. During that time curses is disabled. Returns when
901 * cmd_pid == 0.
902 */
903 static int do_select(int mode)
904 {
905 fd_set rfds;
906 int ret;
907 int max_fileno, cp_numread = 1;
908 char command_buf[4096] = "";
909 int cbo = 0; /* command buf offset */
910 struct timeval tv;
911 repeat:
912 tv.tv_sec = conf.timeout_arg / 1000;
913 tv.tv_usec = (conf.timeout_arg % 1000) * 1000;
914 // ret = refresh_status();
915 FD_ZERO(&rfds);
916 max_fileno = 0;
917 /* audiod pipe */
918 if (audiod_pipe < 0)
919 audiod_pipe = open_audiod_pipe();
920 if (audiod_pipe >= 0)
921 para_fd_set(audiod_pipe, &rfds, &max_fileno);
922 /* signal pipe */
923 para_fd_set(signal_pipe, &rfds, &max_fileno);
924 /* command pipe only for COMMAND_MODE */
925 if (command_pipe >= 0 && mode == COMMAND_MODE)
926 para_fd_set(command_pipe, &rfds, &max_fileno);
927 ret = para_select(max_fileno + 1, &rfds, NULL, &tv);
928 if (ret <= 0)
929 goto check_return; /* skip fd checks */
930 /* signals */
931 if (FD_ISSET(signal_pipe, &rfds)) {
932 int sig_nr = para_next_signal();
933 if (sig_nr > 0)
934 handle_signal(sig_nr);
935 }
936 /* read command pipe if ready */
937 if (command_pipe >= 0 && mode == COMMAND_MODE &&
938 FD_ISSET(command_pipe, &rfds)) {
939 cp_numread = read(command_pipe, command_buf + cbo,
940 sizeof(command_buf) - 1 - cbo);
941 if (cp_numread >= 0)
942 cbo += cp_numread;
943 else {
944 if (cp_numread < 0)
945 PARA_ERROR_LOG("read error (%d)", cp_numread);
946 close(command_pipe);
947 command_pipe = -1;
948 }
949 }
950 if (audiod_pipe >= 0 && FD_ISSET(audiod_pipe, &rfds))
951 if (read_audiod_pipe(audiod_pipe) <= 0) {
952 close(audiod_pipe);
953 audiod_pipe = -1;
954 clear_all_items();
955 free(stat_content[SI_BASENAME]);
956 stat_content[SI_BASENAME] =
957 para_strdup("audiod not running!?");
958 print_all_items();
959 }
960 check_return:
961 switch (mode) {
962 case COMMAND_MODE:
963 if (cp_numread <= 0 && !cbo) /* command complete */
964 return 0;
965 if (cbo)
966 cbo = for_each_line(command_buf, cbo,
967 &add_output_line, NULL);
968 if (cp_numread <= 0)
969 cbo = 0;
970 wrefresh(bot.win);
971 ret = wgetch(top.win);
972 if (ret != ERR && ret != KEY_RESIZE) {
973 if (command_pipe) {
974 close(command_pipe);
975 command_pipe = -1;
976 }
977 if (cmd_pid)
978 kill(cmd_pid, SIGTERM);
979 return -1;
980 }
981 break;
982 case GETCH_MODE:
983 ret = wgetch(top.win);
984 if (ret != ERR && ret != KEY_RESIZE)
985 return ret;
986 break;
987 case EXTERNAL_MODE:
988 if (cmd_died) {
989 cmd_died = 0;
990 return 0;
991 }
992 }
993 goto repeat;
994 }
995
996 /*
997 * read from command pipe and print data to bot window
998 */
999 static int send_output(void)
1000 {
1001 int ret;
1002
1003 if (command_pipe < 0)
1004 return 0;
1005 ret = mark_fd_nonblocking(command_pipe);
1006 if (ret < 0) {
1007 close(command_pipe);
1008 return ret;
1009 }
1010 if (do_select(COMMAND_MODE) >= 0)
1011 PARA_INFO_LOG("command complete");
1012 else
1013 PARA_NOTICE_LOG("command aborted");
1014 print_in_bar(COLOR_MSG, " ");
1015 return 1;
1016 }
1017
1018 static int client_cmd_cmdline(char *cmd)
1019 {
1020 int ret, fds[3] = {0, 1, 0};
1021 char *c = make_message(BINDIR "/para_client -- %s", cmd);
1022
1023 outputf(COLOR_COMMAND, "%s", c);
1024 print_in_bar(COLOR_MSG, "executing client command, hit any key to abort\n");
1025 ret = para_exec_cmdline_pid(&cmd_pid, c, fds);
1026 free(c);
1027 if (ret < 0)
1028 return -1;
1029 command_pipe = fds[1];
1030 return send_output();
1031 }
1032
1033 /*
1034 * exec command and print output to bot win
1035 */
1036 static int display_cmd(char *cmd)
1037 {
1038 int fds[3] = {0, 1, 0};
1039
1040 print_in_bar(COLOR_MSG, "executing display command, hit any key to abort");
1041 outputf(COLOR_COMMAND, "%s", cmd);
1042 if (para_exec_cmdline_pid(&cmd_pid, cmd, fds) < 0)
1043 return -1;
1044 command_pipe = fds[1];
1045 return send_output();
1046 }
1047
1048 /*
1049 * shutdown curses and stat pipe before executing external commands
1050 */
1051 static int external_cmd(char *cmd)
1052 {
1053 int fds[3] = {-1, -1, -1};
1054
1055 if (cmd_pid)
1056 return -1;
1057 shutdown_curses();
1058 para_exec_cmdline_pid(&cmd_pid, cmd, fds);
1059 cmd_died = 0;
1060 do_select(EXTERNAL_MODE);
1061 init_curses();
1062 return 0;
1063 }
1064
1065 static void print_scroll_msg(void)
1066 {
1067 unsigned lines_total, filled = ringbuffer_filled(bot_win_rb);
1068 int first_rbe = first_visible_rbe(&lines_total);
1069 print_in_bar(COLOR_MSG, "scrolled view: %d-%d/%d\n", filled - first_rbe,
1070 filled - scroll_position, ringbuffer_filled(bot_win_rb));
1071 }
1072
1073 static void com_page_down(void)
1074 {
1075 unsigned lines = 0;
1076 int i = scroll_position;
1077 while (lines < bot.lines && --i > 0) {
1078 struct rb_entry *rbe = ringbuffer_get(bot_win_rb, i);
1079 if (!rbe)
1080 break;
1081 lines += NUM_LINES(strlen(rbe->msg));
1082 }
1083 if (lines) {
1084 scroll_position = i;
1085 redraw_bot_win();
1086 print_scroll_msg();
1087 return;
1088 }
1089 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1090 }
1091
1092 static void com_page_up(void)
1093 {
1094 unsigned lines;
1095 int fvr = first_visible_rbe(&lines);
1096
1097 if (fvr < 0 || fvr + 1 >= ringbuffer_filled(bot_win_rb)) {
1098 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1099 return;
1100 }
1101 scroll_position = fvr + 1;
1102 for (; scroll_position > 0; scroll_position--) {
1103 first_visible_rbe(&lines);
1104 if (lines == bot.lines)
1105 break;
1106 }
1107 redraw_bot_win();
1108 print_scroll_msg();
1109 }
1110
1111 static void com_scroll_down(void)
1112 {
1113 struct rb_entry *rbe;
1114 int rbe_lines;
1115
1116 if (!scroll_position) {
1117 print_in_bar(COLOR_ERRMSG, "bottom of buffer is shown\n");
1118 return;
1119 }
1120 scroll_position--;
1121 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1122 rbe_lines = NUM_LINES(rbe->len);
1123 wscrl(bot.win, rbe_lines);
1124 wmove(bot.win, bot.lines - rbe_lines, 0);
1125 wattron(bot.win, COLOR_PAIR(rbe->color));
1126 waddstr(bot.win, rbe->msg);
1127 wrefresh(bot.win);
1128 print_scroll_msg();
1129 }
1130
1131 static void com_scroll_up(void)
1132 {
1133 struct rb_entry *rbe = NULL;
1134 unsigned lines;
1135 int i, first_rbe, num_scroll;
1136
1137 /* the entry that is going to vanish */
1138 rbe = ringbuffer_get(bot_win_rb, scroll_position);
1139 if (!rbe)
1140 goto err_out;
1141 num_scroll = NUM_LINES(rbe->len);
1142 first_rbe = first_visible_rbe(&lines);
1143 if (first_rbe < 0 || (first_rbe == ringbuffer_filled(bot_win_rb) - 1))
1144 goto err_out;
1145 scroll_position++;
1146 wscrl(bot.win, -num_scroll);
1147 i = draw_top_rbe(&lines);
1148 if (i < 0)
1149 goto err_out;
1150 while (i > 0 && lines < num_scroll) {
1151 int rbe_lines;
1152 rbe = ringbuffer_get(bot_win_rb, --i);
1153 if (!rbe)
1154 break;
1155 rbe_lines = NUM_LINES(rbe->len);
1156 lines += rbe_lines;
1157 // fprintf(stderr, "msg: %s\n", rbe->msg);
1158 wattron(bot.win, COLOR_PAIR(rbe->color));
1159 waddstr(bot.win, "\n");
1160 waddstr(bot.win, rbe->msg);
1161 if (!i)
1162 break;
1163 i--;
1164 }
1165 wrefresh(bot.win);
1166 print_scroll_msg();
1167 return;
1168 err_out:
1169 print_in_bar(COLOR_ERRMSG, "top of buffer is shown\n");
1170 }
1171
1172 static void com_ll_decr(void)
1173 {
1174 if (loglevel <= LL_DEBUG) {
1175 print_in_bar(COLOR_ERRMSG,
1176 "loglevel already at maximal verbosity\n");
1177 return;
1178 }
1179 loglevel--;
1180 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1181 }
1182
1183 static void com_ll_incr(void)
1184 {
1185 if (loglevel >= LL_EMERG) {
1186 print_in_bar(COLOR_ERRMSG,
1187 "loglevel already at minimal verbosity\n");
1188 return;
1189 }
1190 loglevel++;
1191 print_in_bar(COLOR_MSG, "loglevel set to %d\n", loglevel);
1192 }
1193
1194 /*
1195 * reread configuration, terminate on errors
1196 */
1197 static void com_reread_conf(void)
1198 {
1199 char *cf =configfile_exists();
1200 struct gui_cmdline_parser_params params = {
1201 .override = 1,
1202 .initialize = 1,
1203 .check_required = 0,
1204 .check_ambiguity = 0
1205 };
1206
1207 if (!cf) {
1208 PARA_WARNING_LOG("there is no configuration to read");
1209 return;
1210 }
1211 PARA_INFO_LOG("rereading command line options and config file");
1212 gui_cmdline_parser(_argc, _argv, &conf);
1213 gui_cmdline_parser_config_file(cf, &conf, &params);
1214 PARA_NOTICE_LOG("config file reloaded");
1215 if (check_key_map_args() < 0)
1216 finish(EXIT_FAILURE);
1217 }
1218
1219 static void com_help(void)
1220 {
1221 int i;
1222
1223 for (i = 0; i < conf.key_map_given; ++i) {
1224 char *handler, *arg, *tmp = para_strdup(conf.key_map_arg[i]);
1225 const char *handler_text = "???", *desc = NULL;
1226
1227 if (!split_key_map(tmp, &handler, &arg)) {
1228 free(tmp);
1229 return;
1230 }
1231 switch (*handler) {
1232 case 'i':
1233 handler_text = "internal";
1234 desc = command_list[find_cmd_byname(arg)].description;
1235 break;
1236 case 'x': handler_text = "external"; break;
1237 case 'd': handler_text = "display "; break;
1238 case 'p': handler_text = "para "; break;
1239 }
1240 outputf(COLOR_MSG, "%s\t%s\t%s%s\t%s", tmp, handler_text, arg,
1241 strlen(arg) < 8? "\t" : "",
1242 desc? desc : "");
1243 free(tmp);
1244 }
1245 for (i = 0; command_list[i].handler; i++) {
1246 struct gui_command gc = command_list[i];
1247
1248 outputf(COLOR_MSG, "%s\tinternal\t%s\t%s%s", gc.key, gc.name,
1249 strlen(gc.name) < 8? "\t" : "",
1250 gc.description);
1251 }
1252 print_in_bar(COLOR_MSG, "try \"para_gui -h\" or \"para_client help\" "
1253 "for more info");
1254 }
1255
1256 static void com_shrink_top_win(void)
1257 {
1258 if (top.lines <= theme.top_lines_min) {
1259 PARA_WARNING_LOG("can not decrease top window");
1260 return;
1261 }
1262 init_wins(top.lines - 1);
1263 wclear(top.win);
1264 print_all_items();
1265 print_in_bar(COLOR_MSG, "%s", "decreased top window");
1266 }
1267
1268 static void com_enlarge_top_win(void)
1269 {
1270 if (bot.lines < 3) {
1271 PARA_WARNING_LOG("can not increase top window");
1272 return;
1273 }
1274 init_wins(top.lines + 1);
1275 wclear(top.win);
1276 print_all_items();
1277 print_in_bar(COLOR_MSG, "increased top window");
1278 }
1279
1280 static void com_version(void)
1281 {
1282 print_in_bar(COLOR_MSG, "para_gui " PACKAGE_VERSION " \""
1283 CODENAME "\"");
1284 }
1285
1286 __noreturn static void com_quit(void)
1287 {
1288 finish(0);
1289 }
1290
1291 static void com_refresh(void)
1292 {
1293 shutdown_curses();
1294 init_curses();
1295 }
1296
1297 static void change_theme(int next)
1298 {
1299 if (next)
1300 next_theme(&theme);
1301 else
1302 prev_theme(&theme);
1303 /* This seems to be needed twice, why? */
1304 com_refresh();
1305 com_refresh();
1306 PARA_NOTICE_LOG("new theme: %s", theme.name);
1307 }
1308
1309 static void com_next_theme(void)
1310 {
1311 change_theme(1);
1312 }
1313
1314 static void com_prev_theme(void)
1315 {
1316 change_theme(0);
1317 }
1318
1319
1320 static void handle_command(int c)
1321 {
1322 int i;
1323
1324 /* first check user's key bindings */
1325 for (i = 0; i < conf.key_map_given; ++i) {
1326 char tmp[MAXLINE], *handler, *arg;
1327
1328 strcpy(tmp, conf.key_map_arg[i]);
1329 if (!split_key_map(tmp, &handler, &arg))
1330 return;
1331 if (!strcmp(tmp, km_keyname(c))) {
1332 if (*handler == 'd') {
1333 display_cmd(arg);
1334 return;
1335 }
1336 if (*handler == 'x') {
1337 external_cmd(arg);
1338 return;
1339 }
1340 if (*handler == 'p') {
1341 client_cmd_cmdline(arg);
1342 return;
1343 }
1344 if (*handler == 'i') {
1345 int num = find_cmd_byname(arg);
1346 if (num >= 0)
1347 command_list[num].handler();
1348 return;
1349 }
1350 }
1351 }
1352 /* not found, check internal key bindings */
1353 for (i = 0; command_list[i].handler; i++) {
1354 if (!strcmp(km_keyname(c), command_list[i].key)) {
1355 command_list[i].handler();
1356 return;
1357 }
1358 }
1359 print_in_bar(COLOR_ERRMSG, "key '%s' is not bound, press ? for help",
1360 km_keyname(c));
1361 }
1362
1363 int main(int argc, char *argv[])
1364 {
1365 int ret;
1366 char *cf;
1367
1368 _argc = argc;
1369 _argv = argv;
1370
1371 if (gui_cmdline_parser(argc, argv, &conf)) {
1372 fprintf(stderr, "parse error while reading command line\n");
1373 exit(EXIT_FAILURE);
1374 }
1375 HANDLE_VERSION_FLAG("gui", conf);
1376 init_theme(0, &theme);
1377 top.lines = theme.top_lines_default;
1378 if (check_key_map_args() < 0) {
1379 fprintf(stderr, "invalid key map\n");
1380 exit(EXIT_FAILURE);
1381 }
1382 cf = configfile_exists();
1383 if (!cf && conf.config_file_given) {
1384 fprintf(stderr, "can not read config file %s\n",
1385 conf.config_file_arg);
1386 exit(EXIT_FAILURE);
1387 }
1388 if (cf) {
1389 struct gui_cmdline_parser_params params = {
1390 .override = 0,
1391 .initialize = 0,
1392 .check_required = 0,
1393 .check_ambiguity = 0
1394 };
1395 gui_cmdline_parser_config_file(cf, &conf, &params);
1396 }
1397 loglevel = get_loglevel_by_name(conf.loglevel_arg);
1398 if (check_key_map_args() < 0) {
1399 fprintf(stderr, "invalid key map in config file\n");
1400 exit(EXIT_FAILURE);
1401 }
1402 setup_signal_handling();
1403 bot_win_rb = ringbuffer_new(RINGBUFFER_SIZE);
1404 initscr(); /* needed only once, always successful */
1405 init_curses();
1406 print_welcome();
1407 for (;;) {
1408 print_status_bar();
1409 ret = do_select(GETCH_MODE);
1410 if (!ret)
1411 continue;
1412 print_in_bar(COLOR_MSG, " ");
1413 handle_command(ret);
1414 }
1415 }