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[st.git] / st.c
1 /* See LICENSE for license details. */
2 #include <ctype.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include <limits.h>
6 #include <locale.h>
7 #include <pwd.h>
8 #include <stdarg.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <string.h>
12 #include <signal.h>
13 #include <stdint.h>
14 #include <sys/ioctl.h>
15 #include <sys/select.h>
16 #include <sys/stat.h>
17 #include <sys/time.h>
18 #include <sys/types.h>
19 #include <sys/wait.h>
20 #include <termios.h>
21 #include <time.h>
22 #include <unistd.h>
23 #include <libgen.h>
24 #include <fontconfig/fontconfig.h>
25 #include <wchar.h>
26
27 /* X11 */
28 #include <X11/cursorfont.h>
29 #include <X11/Xft/Xft.h>
30
31 char *argv0;
32
33 #define Glyph Glyph_
34 #define Font Font_
35
36 #include "win.h"
37 #include "st.h"
38
39 #if defined(__linux)
40 #include <pty.h>
41 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
42 #include <util.h>
43 #elif defined(__FreeBSD__) || defined(__DragonFly__)
44 #include <libutil.h>
45 #endif
46
47 /* Arbitrary sizes */
48 #define UTF_INVALID 0xFFFD
49 #define ESC_BUF_SIZ (128*UTF_SIZ)
50 #define ESC_ARG_SIZ 16
51 #define STR_BUF_SIZ ESC_BUF_SIZ
52 #define STR_ARG_SIZ ESC_ARG_SIZ
53
54 /* macros */
55 #define NUMMAXLEN(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
56 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
57 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
58 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
59 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
60 #define ISDELIM(u) (utf8strchr(worddelimiters, u) != NULL)
61
62 /* constants */
63 #define ISO14755CMD "dmenu -w %lu -p codepoint: </dev/null"
64
65 enum cursor_movement {
66 CURSOR_SAVE,
67 CURSOR_LOAD
68 };
69
70 enum cursor_state {
71 CURSOR_DEFAULT = 0,
72 CURSOR_WRAPNEXT = 1,
73 CURSOR_ORIGIN = 2
74 };
75
76 enum charset {
77 CS_GRAPHIC0,
78 CS_GRAPHIC1,
79 CS_UK,
80 CS_USA,
81 CS_MULTI,
82 CS_GER,
83 CS_FIN
84 };
85
86 enum escape_state {
87 ESC_START = 1,
88 ESC_CSI = 2,
89 ESC_STR = 4, /* OSC, PM, APC */
90 ESC_ALTCHARSET = 8,
91 ESC_STR_END = 16, /* a final string was encountered */
92 ESC_TEST = 32, /* Enter in test mode */
93 ESC_UTF8 = 64,
94 ESC_DCS =128,
95 };
96
97 /* CSI Escape sequence structs */
98 /* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
99 typedef struct {
100 char buf[ESC_BUF_SIZ]; /* raw string */
101 int len; /* raw string length */
102 char priv;
103 int arg[ESC_ARG_SIZ];
104 int narg; /* nb of args */
105 char mode[2];
106 } CSIEscape;
107
108 /* STR Escape sequence structs */
109 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
110 typedef struct {
111 char type; /* ESC type ... */
112 char buf[STR_BUF_SIZ]; /* raw string */
113 int len; /* raw string length */
114 char *args[STR_ARG_SIZ];
115 int narg; /* nb of args */
116 } STREscape;
117
118 typedef struct {
119 KeySym k;
120 uint mask;
121 char *s;
122 /* three valued logic variables: 0 indifferent, 1 on, -1 off */
123 signed char appkey; /* application keypad */
124 signed char appcursor; /* application cursor */
125 signed char crlf; /* crlf mode */
126 } Key;
127
128 /* function definitions used in config.h */
129 static void clipcopy(const Arg *);
130 static void clippaste(const Arg *);
131 static void numlock(const Arg *);
132 static void selpaste(const Arg *);
133 static void zoom(const Arg *);
134 static void zoomabs(const Arg *);
135 static void zoomreset(const Arg *);
136 static void printsel(const Arg *);
137 static void printscreen(const Arg *) ;
138 static void iso14755(const Arg *);
139 static void toggleprinter(const Arg *);
140 static void sendbreak(const Arg *);
141
142 /* config.h for applying patches and the configuration. */
143 #include "config.h"
144
145 static void execsh(void);
146 static void stty(void);
147 static void sigchld(int);
148
149 static void csidump(void);
150 static void csihandle(void);
151 static void csiparse(void);
152 static void csireset(void);
153 static int eschandle(uchar);
154 static void strdump(void);
155 static void strhandle(void);
156 static void strparse(void);
157 static void strreset(void);
158
159 static void tprinter(char *, size_t);
160 static void tdumpsel(void);
161 static void tdumpline(int);
162 static void tdump(void);
163 static void tclearregion(int, int, int, int);
164 static void tcursor(int);
165 static void tdeletechar(int);
166 static void tdeleteline(int);
167 static void tinsertblank(int);
168 static void tinsertblankline(int);
169 static int tlinelen(int);
170 static void tmoveto(int, int);
171 static void tmoveato(int, int);
172 static void tnewline(int);
173 static void tputtab(int);
174 static void tputc(Rune);
175 static void treset(void);
176 static void tresize(int, int);
177 static void tscrollup(int, int);
178 static void tscrolldown(int, int);
179 static void tsetattr(int *, int);
180 static void tsetchar(Rune, Glyph *, int, int);
181 static void tsetscroll(int, int);
182 static void tswapscreen(void);
183 static void tsetmode(int, int, int *, int);
184 static void tfulldirt(void);
185 static void techo(Rune);
186 static void tcontrolcode(uchar );
187 static void tdectest(char );
188 static void tdefutf8(char);
189 static int32_t tdefcolor(int *, int *, int);
190 static void tdeftran(char);
191 static void tstrsequence(uchar);
192
193 static void selscroll(int, int);
194 static void selsnap(int *, int *, int);
195
196 static Rune utf8decodebyte(char, size_t *);
197 static char utf8encodebyte(Rune, size_t);
198 static char *utf8strchr(char *s, Rune u);
199 static size_t utf8validate(Rune *, size_t);
200
201 static ssize_t xwrite(int, const char *, size_t);
202 static void *xrealloc(void *, size_t);
203
204 /* Globals */
205 TermWindow win;
206 Term term;
207 Selection sel;
208 int cmdfd;
209 pid_t pid;
210 char **opt_cmd = NULL;
211 char *opt_class = NULL;
212 char *opt_embed = NULL;
213 char *opt_font = NULL;
214 char *opt_io = NULL;
215 char *opt_line = NULL;
216 char *opt_name = NULL;
217 char *opt_title = NULL;
218 int oldbutton = 3; /* button event on startup: 3 = release */
219
220 static CSIEscape csiescseq;
221 static STREscape strescseq;
222 static int iofd = 1;
223
224 char *usedfont = NULL;
225 double usedfontsize = 0;
226 double defaultfontsize = 0;
227
228 static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
229 static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
230 static Rune utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
231 static Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
232
233 /* config.h array lengths */
234 size_t colornamelen = LEN(colorname);
235 size_t mshortcutslen = LEN(mshortcuts);
236 size_t shortcutslen = LEN(shortcuts);
237 size_t selmaskslen = LEN(selmasks);
238
239 ssize_t
240 xwrite(int fd, const char *s, size_t len)
241 {
242 size_t aux = len;
243 ssize_t r;
244
245 while (len > 0) {
246 r = write(fd, s, len);
247 if (r < 0)
248 return r;
249 len -= r;
250 s += r;
251 }
252
253 return aux;
254 }
255
256 void *
257 xmalloc(size_t len)
258 {
259 void *p = malloc(len);
260
261 if (!p)
262 die("Out of memory\n");
263
264 return p;
265 }
266
267 void *
268 xrealloc(void *p, size_t len)
269 {
270 if ((p = realloc(p, len)) == NULL)
271 die("Out of memory\n");
272
273 return p;
274 }
275
276 char *
277 xstrdup(char *s)
278 {
279 if ((s = strdup(s)) == NULL)
280 die("Out of memory\n");
281
282 return s;
283 }
284
285 size_t
286 utf8decode(char *c, Rune *u, size_t clen)
287 {
288 size_t i, j, len, type;
289 Rune udecoded;
290
291 *u = UTF_INVALID;
292 if (!clen)
293 return 0;
294 udecoded = utf8decodebyte(c[0], &len);
295 if (!BETWEEN(len, 1, UTF_SIZ))
296 return 1;
297 for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
298 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
299 if (type != 0)
300 return j;
301 }
302 if (j < len)
303 return 0;
304 *u = udecoded;
305 utf8validate(u, len);
306
307 return len;
308 }
309
310 Rune
311 utf8decodebyte(char c, size_t *i)
312 {
313 for (*i = 0; *i < LEN(utfmask); ++(*i))
314 if (((uchar)c & utfmask[*i]) == utfbyte[*i])
315 return (uchar)c & ~utfmask[*i];
316
317 return 0;
318 }
319
320 size_t
321 utf8encode(Rune u, char *c)
322 {
323 size_t len, i;
324
325 len = utf8validate(&u, 0);
326 if (len > UTF_SIZ)
327 return 0;
328
329 for (i = len - 1; i != 0; --i) {
330 c[i] = utf8encodebyte(u, 0);
331 u >>= 6;
332 }
333 c[0] = utf8encodebyte(u, len);
334
335 return len;
336 }
337
338 char
339 utf8encodebyte(Rune u, size_t i)
340 {
341 return utfbyte[i] | (u & ~utfmask[i]);
342 }
343
344 char *
345 utf8strchr(char *s, Rune u)
346 {
347 Rune r;
348 size_t i, j, len;
349
350 len = strlen(s);
351 for (i = 0, j = 0; i < len; i += j) {
352 if (!(j = utf8decode(&s[i], &r, len - i)))
353 break;
354 if (r == u)
355 return &(s[i]);
356 }
357
358 return NULL;
359 }
360
361 size_t
362 utf8validate(Rune *u, size_t i)
363 {
364 if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
365 *u = UTF_INVALID;
366 for (i = 1; *u > utfmax[i]; ++i)
367 ;
368
369 return i;
370 }
371
372 void
373 selinit(void)
374 {
375 clock_gettime(CLOCK_MONOTONIC, &sel.tclick1);
376 clock_gettime(CLOCK_MONOTONIC, &sel.tclick2);
377 sel.mode = SEL_IDLE;
378 sel.snap = 0;
379 sel.ob.x = -1;
380 sel.primary = NULL;
381 sel.clipboard = NULL;
382 }
383
384 int
385 x2col(int x)
386 {
387 x -= borderpx;
388 x /= win.cw;
389
390 return LIMIT(x, 0, term.col-1);
391 }
392
393 int
394 y2row(int y)
395 {
396 y -= borderpx;
397 y /= win.ch;
398
399 return LIMIT(y, 0, term.row-1);
400 }
401
402 int
403 tlinelen(int y)
404 {
405 int i = term.col;
406
407 if (term.line[y][i - 1].mode & ATTR_WRAP)
408 return i;
409
410 while (i > 0 && term.line[y][i - 1].u == ' ')
411 --i;
412
413 return i;
414 }
415
416 void
417 selnormalize(void)
418 {
419 int i;
420
421 if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
422 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
423 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
424 } else {
425 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
426 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
427 }
428 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
429 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
430
431 selsnap(&sel.nb.x, &sel.nb.y, -1);
432 selsnap(&sel.ne.x, &sel.ne.y, +1);
433
434 /* expand selection over line breaks */
435 if (sel.type == SEL_RECTANGULAR)
436 return;
437 i = tlinelen(sel.nb.y);
438 if (i < sel.nb.x)
439 sel.nb.x = i;
440 if (tlinelen(sel.ne.y) <= sel.ne.x)
441 sel.ne.x = term.col - 1;
442 }
443
444 int
445 selected(int x, int y)
446 {
447 if (sel.mode == SEL_EMPTY)
448 return 0;
449
450 if (sel.type == SEL_RECTANGULAR)
451 return BETWEEN(y, sel.nb.y, sel.ne.y)
452 && BETWEEN(x, sel.nb.x, sel.ne.x);
453
454 return BETWEEN(y, sel.nb.y, sel.ne.y)
455 && (y != sel.nb.y || x >= sel.nb.x)
456 && (y != sel.ne.y || x <= sel.ne.x);
457 }
458
459 void
460 selsnap(int *x, int *y, int direction)
461 {
462 int newx, newy, xt, yt;
463 int delim, prevdelim;
464 Glyph *gp, *prevgp;
465
466 switch (sel.snap) {
467 case SNAP_WORD:
468 /*
469 * Snap around if the word wraps around at the end or
470 * beginning of a line.
471 */
472 prevgp = &term.line[*y][*x];
473 prevdelim = ISDELIM(prevgp->u);
474 for (;;) {
475 newx = *x + direction;
476 newy = *y;
477 if (!BETWEEN(newx, 0, term.col - 1)) {
478 newy += direction;
479 newx = (newx + term.col) % term.col;
480 if (!BETWEEN(newy, 0, term.row - 1))
481 break;
482
483 if (direction > 0)
484 yt = *y, xt = *x;
485 else
486 yt = newy, xt = newx;
487 if (!(term.line[yt][xt].mode & ATTR_WRAP))
488 break;
489 }
490
491 if (newx >= tlinelen(newy))
492 break;
493
494 gp = &term.line[newy][newx];
495 delim = ISDELIM(gp->u);
496 if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
497 || (delim && gp->u != prevgp->u)))
498 break;
499
500 *x = newx;
501 *y = newy;
502 prevgp = gp;
503 prevdelim = delim;
504 }
505 break;
506 case SNAP_LINE:
507 /*
508 * Snap around if the the previous line or the current one
509 * has set ATTR_WRAP at its end. Then the whole next or
510 * previous line will be selected.
511 */
512 *x = (direction < 0) ? 0 : term.col - 1;
513 if (direction < 0) {
514 for (; *y > 0; *y += direction) {
515 if (!(term.line[*y-1][term.col-1].mode
516 & ATTR_WRAP)) {
517 break;
518 }
519 }
520 } else if (direction > 0) {
521 for (; *y < term.row-1; *y += direction) {
522 if (!(term.line[*y][term.col-1].mode
523 & ATTR_WRAP)) {
524 break;
525 }
526 }
527 }
528 break;
529 }
530 }
531
532 char *
533 getsel(void)
534 {
535 char *str, *ptr;
536 int y, bufsize, lastx, linelen;
537 Glyph *gp, *last;
538
539 if (sel.ob.x == -1)
540 return NULL;
541
542 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
543 ptr = str = xmalloc(bufsize);
544
545 /* append every set & selected glyph to the selection */
546 for (y = sel.nb.y; y <= sel.ne.y; y++) {
547 if ((linelen = tlinelen(y)) == 0) {
548 *ptr++ = '\n';
549 continue;
550 }
551
552 if (sel.type == SEL_RECTANGULAR) {
553 gp = &term.line[y][sel.nb.x];
554 lastx = sel.ne.x;
555 } else {
556 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
557 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
558 }
559 last = &term.line[y][MIN(lastx, linelen-1)];
560 while (last >= gp && last->u == ' ')
561 --last;
562
563 for ( ; gp <= last; ++gp) {
564 if (gp->mode & ATTR_WDUMMY)
565 continue;
566
567 ptr += utf8encode(gp->u, ptr);
568 }
569
570 /*
571 * Copy and pasting of line endings is inconsistent
572 * in the inconsistent terminal and GUI world.
573 * The best solution seems like to produce '\n' when
574 * something is copied from st and convert '\n' to
575 * '\r', when something to be pasted is received by
576 * st.
577 * FIXME: Fix the computer world.
578 */
579 if ((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
580 *ptr++ = '\n';
581 }
582 *ptr = 0;
583 return str;
584 }
585
586 void
587 selpaste(const Arg *dummy)
588 {
589 xselpaste();
590 }
591
592 void
593 clipcopy(const Arg *dummy)
594 {
595 xclipcopy();
596 }
597
598 void
599 clippaste(const Arg *dummy)
600 {
601 xclippaste();
602 }
603
604 void
605 selclear(void)
606 {
607 if (sel.ob.x == -1)
608 return;
609 sel.mode = SEL_IDLE;
610 sel.ob.x = -1;
611 tsetdirt(sel.nb.y, sel.ne.y);
612 }
613
614 void
615 die(const char *errstr, ...)
616 {
617 va_list ap;
618
619 va_start(ap, errstr);
620 vfprintf(stderr, errstr, ap);
621 va_end(ap);
622 exit(1);
623 }
624
625 void
626 execsh(void)
627 {
628 char **args, *sh, *prog;
629 const struct passwd *pw;
630
631 errno = 0;
632 if ((pw = getpwuid(getuid())) == NULL) {
633 if (errno)
634 die("getpwuid:%s\n", strerror(errno));
635 else
636 die("who are you?\n");
637 }
638
639 if ((sh = getenv("SHELL")) == NULL)
640 sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
641
642 if (opt_cmd)
643 prog = opt_cmd[0];
644 else if (utmp)
645 prog = utmp;
646 else
647 prog = sh;
648 args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
649
650 unsetenv("COLUMNS");
651 unsetenv("LINES");
652 unsetenv("TERMCAP");
653 setenv("LOGNAME", pw->pw_name, 1);
654 setenv("USER", pw->pw_name, 1);
655 setenv("SHELL", sh, 1);
656 setenv("HOME", pw->pw_dir, 1);
657 setenv("TERM", termname, 1);
658 xsetenv();
659
660 signal(SIGCHLD, SIG_DFL);
661 signal(SIGHUP, SIG_DFL);
662 signal(SIGINT, SIG_DFL);
663 signal(SIGQUIT, SIG_DFL);
664 signal(SIGTERM, SIG_DFL);
665 signal(SIGALRM, SIG_DFL);
666
667 execvp(prog, args);
668 _exit(1);
669 }
670
671 void
672 sigchld(int a)
673 {
674 int stat;
675 pid_t p;
676
677 if ((p = waitpid(pid, &stat, WNOHANG)) < 0)
678 die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
679
680 if (pid != p)
681 return;
682
683 if (!WIFEXITED(stat) || WEXITSTATUS(stat))
684 die("child finished with error '%d'\n", stat);
685 exit(0);
686 }
687
688
689 void
690 stty(void)
691 {
692 char cmd[_POSIX_ARG_MAX], **p, *q, *s;
693 size_t n, siz;
694
695 if ((n = strlen(stty_args)) > sizeof(cmd)-1)
696 die("incorrect stty parameters\n");
697 memcpy(cmd, stty_args, n);
698 q = cmd + n;
699 siz = sizeof(cmd) - n;
700 for (p = opt_cmd; p && (s = *p); ++p) {
701 if ((n = strlen(s)) > siz-1)
702 die("stty parameter length too long\n");
703 *q++ = ' ';
704 memcpy(q, s, n);
705 q += n;
706 siz -= n + 1;
707 }
708 *q = '\0';
709 if (system(cmd) != 0)
710 perror("Couldn't call stty");
711 }
712
713 void
714 ttynew(void)
715 {
716 int m, s;
717 struct winsize w = {term.row, term.col, 0, 0};
718
719 if (opt_io) {
720 term.mode |= MODE_PRINT;
721 iofd = (!strcmp(opt_io, "-")) ?
722 1 : open(opt_io, O_WRONLY | O_CREAT, 0666);
723 if (iofd < 0) {
724 fprintf(stderr, "Error opening %s:%s\n",
725 opt_io, strerror(errno));
726 }
727 }
728
729 if (opt_line) {
730 if ((cmdfd = open(opt_line, O_RDWR)) < 0)
731 die("open line failed: %s\n", strerror(errno));
732 dup2(cmdfd, 0);
733 stty();
734 return;
735 }
736
737 /* seems to work fine on linux, openbsd and freebsd */
738 if (openpty(&m, &s, NULL, NULL, &w) < 0)
739 die("openpty failed: %s\n", strerror(errno));
740
741 switch (pid = fork()) {
742 case -1:
743 die("fork failed\n");
744 break;
745 case 0:
746 close(iofd);
747 setsid(); /* create a new process group */
748 dup2(s, 0);
749 dup2(s, 1);
750 dup2(s, 2);
751 if (ioctl(s, TIOCSCTTY, NULL) < 0)
752 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
753 close(s);
754 close(m);
755 execsh();
756 break;
757 default:
758 close(s);
759 cmdfd = m;
760 signal(SIGCHLD, sigchld);
761 break;
762 }
763 }
764
765 size_t
766 ttyread(void)
767 {
768 static char buf[BUFSIZ];
769 static int buflen = 0;
770 char *ptr;
771 int charsize; /* size of utf8 char in bytes */
772 Rune unicodep;
773 int ret;
774
775 /* append read bytes to unprocessed bytes */
776 if ((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
777 die("Couldn't read from shell: %s\n", strerror(errno));
778
779 buflen += ret;
780 ptr = buf;
781
782 for (;;) {
783 if (IS_SET(MODE_UTF8) && !IS_SET(MODE_SIXEL)) {
784 /* process a complete utf8 char */
785 charsize = utf8decode(ptr, &unicodep, buflen);
786 if (charsize == 0)
787 break;
788 tputc(unicodep);
789 ptr += charsize;
790 buflen -= charsize;
791
792 } else {
793 if (buflen <= 0)
794 break;
795 tputc(*ptr++ & 0xFF);
796 buflen--;
797 }
798 }
799 /* keep any uncomplete utf8 char for the next call */
800 if (buflen > 0)
801 memmove(buf, ptr, buflen);
802
803 return ret;
804 }
805
806 void
807 ttywrite(const char *s, size_t n)
808 {
809 fd_set wfd, rfd;
810 ssize_t r;
811 size_t lim = 256;
812
813 /*
814 * Remember that we are using a pty, which might be a modem line.
815 * Writing too much will clog the line. That's why we are doing this
816 * dance.
817 * FIXME: Migrate the world to Plan 9.
818 */
819 while (n > 0) {
820 FD_ZERO(&wfd);
821 FD_ZERO(&rfd);
822 FD_SET(cmdfd, &wfd);
823 FD_SET(cmdfd, &rfd);
824
825 /* Check if we can write. */
826 if (pselect(cmdfd+1, &rfd, &wfd, NULL, NULL, NULL) < 0) {
827 if (errno == EINTR)
828 continue;
829 die("select failed: %s\n", strerror(errno));
830 }
831 if (FD_ISSET(cmdfd, &wfd)) {
832 /*
833 * Only write the bytes written by ttywrite() or the
834 * default of 256. This seems to be a reasonable value
835 * for a serial line. Bigger values might clog the I/O.
836 */
837 if ((r = write(cmdfd, s, (n < lim)? n : lim)) < 0)
838 goto write_error;
839 if (r < n) {
840 /*
841 * We weren't able to write out everything.
842 * This means the buffer is getting full
843 * again. Empty it.
844 */
845 if (n < lim)
846 lim = ttyread();
847 n -= r;
848 s += r;
849 } else {
850 /* All bytes have been written. */
851 break;
852 }
853 }
854 if (FD_ISSET(cmdfd, &rfd))
855 lim = ttyread();
856 }
857 return;
858
859 write_error:
860 die("write error on tty: %s\n", strerror(errno));
861 }
862
863 void
864 ttysend(char *s, size_t n)
865 {
866 int len;
867 char *t, *lim;
868 Rune u;
869
870 ttywrite(s, n);
871 if (!IS_SET(MODE_ECHO))
872 return;
873
874 lim = &s[n];
875 for (t = s; t < lim; t += len) {
876 if (IS_SET(MODE_UTF8) && !IS_SET(MODE_SIXEL)) {
877 len = utf8decode(t, &u, n);
878 } else {
879 u = *t & 0xFF;
880 len = 1;
881 }
882 if (len <= 0)
883 break;
884 techo(u);
885 n -= len;
886 }
887 }
888
889 void
890 ttyresize(void)
891 {
892 struct winsize w;
893
894 w.ws_row = term.row;
895 w.ws_col = term.col;
896 w.ws_xpixel = win.tw;
897 w.ws_ypixel = win.th;
898 if (ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
899 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
900 }
901
902 int
903 tattrset(int attr)
904 {
905 int i, j;
906
907 for (i = 0; i < term.row-1; i++) {
908 for (j = 0; j < term.col-1; j++) {
909 if (term.line[i][j].mode & attr)
910 return 1;
911 }
912 }
913
914 return 0;
915 }
916
917 void
918 tsetdirt(int top, int bot)
919 {
920 int i;
921
922 LIMIT(top, 0, term.row-1);
923 LIMIT(bot, 0, term.row-1);
924
925 for (i = top; i <= bot; i++)
926 term.dirty[i] = 1;
927 }
928
929 void
930 tsetdirtattr(int attr)
931 {
932 int i, j;
933
934 for (i = 0; i < term.row-1; i++) {
935 for (j = 0; j < term.col-1; j++) {
936 if (term.line[i][j].mode & attr) {
937 tsetdirt(i, i);
938 break;
939 }
940 }
941 }
942 }
943
944 void
945 tfulldirt(void)
946 {
947 tsetdirt(0, term.row-1);
948 }
949
950 void
951 tcursor(int mode)
952 {
953 static TCursor c[2];
954 int alt = IS_SET(MODE_ALTSCREEN);
955
956 if (mode == CURSOR_SAVE) {
957 c[alt] = term.c;
958 } else if (mode == CURSOR_LOAD) {
959 term.c = c[alt];
960 tmoveto(c[alt].x, c[alt].y);
961 }
962 }
963
964 void
965 treset(void)
966 {
967 uint i;
968
969 term.c = (TCursor){{
970 .mode = ATTR_NULL,
971 .fg = defaultfg,
972 .bg = defaultbg
973 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
974
975 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
976 for (i = tabspaces; i < term.col; i += tabspaces)
977 term.tabs[i] = 1;
978 term.top = 0;
979 term.bot = term.row - 1;
980 term.mode = MODE_WRAP|MODE_UTF8;
981 memset(term.trantbl, CS_USA, sizeof(term.trantbl));
982 term.charset = 0;
983
984 for (i = 0; i < 2; i++) {
985 tmoveto(0, 0);
986 tcursor(CURSOR_SAVE);
987 tclearregion(0, 0, term.col-1, term.row-1);
988 tswapscreen();
989 }
990 }
991
992 void
993 tnew(int col, int row)
994 {
995 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
996 tresize(col, row);
997 term.numlock = 1;
998
999 treset();
1000 }
1001
1002 void
1003 tswapscreen(void)
1004 {
1005 Line *tmp = term.line;
1006
1007 term.line = term.alt;
1008 term.alt = tmp;
1009 term.mode ^= MODE_ALTSCREEN;
1010 tfulldirt();
1011 }
1012
1013 void
1014 tscrolldown(int orig, int n)
1015 {
1016 int i;
1017 Line temp;
1018
1019 LIMIT(n, 0, term.bot-orig+1);
1020
1021 tsetdirt(orig, term.bot-n);
1022 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1023
1024 for (i = term.bot; i >= orig+n; i--) {
1025 temp = term.line[i];
1026 term.line[i] = term.line[i-n];
1027 term.line[i-n] = temp;
1028 }
1029
1030 selscroll(orig, n);
1031 }
1032
1033 void
1034 tscrollup(int orig, int n)
1035 {
1036 int i;
1037 Line temp;
1038
1039 LIMIT(n, 0, term.bot-orig+1);
1040
1041 tclearregion(0, orig, term.col-1, orig+n-1);
1042 tsetdirt(orig+n, term.bot);
1043
1044 for (i = orig; i <= term.bot-n; i++) {
1045 temp = term.line[i];
1046 term.line[i] = term.line[i+n];
1047 term.line[i+n] = temp;
1048 }
1049
1050 selscroll(orig, -n);
1051 }
1052
1053 void
1054 selscroll(int orig, int n)
1055 {
1056 if (sel.ob.x == -1)
1057 return;
1058
1059 if (BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
1060 if ((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
1061 selclear();
1062 return;
1063 }
1064 if (sel.type == SEL_RECTANGULAR) {
1065 if (sel.ob.y < term.top)
1066 sel.ob.y = term.top;
1067 if (sel.oe.y > term.bot)
1068 sel.oe.y = term.bot;
1069 } else {
1070 if (sel.ob.y < term.top) {
1071 sel.ob.y = term.top;
1072 sel.ob.x = 0;
1073 }
1074 if (sel.oe.y > term.bot) {
1075 sel.oe.y = term.bot;
1076 sel.oe.x = term.col;
1077 }
1078 }
1079 selnormalize();
1080 }
1081 }
1082
1083 void
1084 tnewline(int first_col)
1085 {
1086 int y = term.c.y;
1087
1088 if (y == term.bot) {
1089 tscrollup(term.top, 1);
1090 } else {
1091 y++;
1092 }
1093 tmoveto(first_col ? 0 : term.c.x, y);
1094 }
1095
1096 void
1097 csiparse(void)
1098 {
1099 char *p = csiescseq.buf, *np;
1100 long int v;
1101
1102 csiescseq.narg = 0;
1103 if (*p == '?') {
1104 csiescseq.priv = 1;
1105 p++;
1106 }
1107
1108 csiescseq.buf[csiescseq.len] = '\0';
1109 while (p < csiescseq.buf+csiescseq.len) {
1110 np = NULL;
1111 v = strtol(p, &np, 10);
1112 if (np == p)
1113 v = 0;
1114 if (v == LONG_MAX || v == LONG_MIN)
1115 v = -1;
1116 csiescseq.arg[csiescseq.narg++] = v;
1117 p = np;
1118 if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1119 break;
1120 p++;
1121 }
1122 csiescseq.mode[0] = *p++;
1123 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1124 }
1125
1126 /* for absolute user moves, when decom is set */
1127 void
1128 tmoveato(int x, int y)
1129 {
1130 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1131 }
1132
1133 void
1134 tmoveto(int x, int y)
1135 {
1136 int miny, maxy;
1137
1138 if (term.c.state & CURSOR_ORIGIN) {
1139 miny = term.top;
1140 maxy = term.bot;
1141 } else {
1142 miny = 0;
1143 maxy = term.row - 1;
1144 }
1145 term.c.state &= ~CURSOR_WRAPNEXT;
1146 term.c.x = LIMIT(x, 0, term.col-1);
1147 term.c.y = LIMIT(y, miny, maxy);
1148 }
1149
1150 void
1151 tsetchar(Rune u, Glyph *attr, int x, int y)
1152 {
1153 static char *vt100_0[62] = { /* 0x41 - 0x7e */
1154 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1155 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1156 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1157 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1158 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1159 "␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1160 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1161 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1162 };
1163
1164 /*
1165 * The table is proudly stolen from rxvt.
1166 */
1167 if (term.trantbl[term.charset] == CS_GRAPHIC0 &&
1168 BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
1169 utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
1170
1171 if (term.line[y][x].mode & ATTR_WIDE) {
1172 if (x+1 < term.col) {
1173 term.line[y][x+1].u = ' ';
1174 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1175 }
1176 } else if (term.line[y][x].mode & ATTR_WDUMMY) {
1177 term.line[y][x-1].u = ' ';
1178 term.line[y][x-1].mode &= ~ATTR_WIDE;
1179 }
1180
1181 term.dirty[y] = 1;
1182 term.line[y][x] = *attr;
1183 term.line[y][x].u = u;
1184 }
1185
1186 void
1187 tclearregion(int x1, int y1, int x2, int y2)
1188 {
1189 int x, y, temp;
1190 Glyph *gp;
1191
1192 if (x1 > x2)
1193 temp = x1, x1 = x2, x2 = temp;
1194 if (y1 > y2)
1195 temp = y1, y1 = y2, y2 = temp;
1196
1197 LIMIT(x1, 0, term.col-1);
1198 LIMIT(x2, 0, term.col-1);
1199 LIMIT(y1, 0, term.row-1);
1200 LIMIT(y2, 0, term.row-1);
1201
1202 for (y = y1; y <= y2; y++) {
1203 term.dirty[y] = 1;
1204 for (x = x1; x <= x2; x++) {
1205 gp = &term.line[y][x];
1206 if (selected(x, y))
1207 selclear();
1208 gp->fg = term.c.attr.fg;
1209 gp->bg = term.c.attr.bg;
1210 gp->mode = 0;
1211 gp->u = ' ';
1212 }
1213 }
1214 }
1215
1216 void
1217 tdeletechar(int n)
1218 {
1219 int dst, src, size;
1220 Glyph *line;
1221
1222 LIMIT(n, 0, term.col - term.c.x);
1223
1224 dst = term.c.x;
1225 src = term.c.x + n;
1226 size = term.col - src;
1227 line = term.line[term.c.y];
1228
1229 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1230 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1231 }
1232
1233 void
1234 tinsertblank(int n)
1235 {
1236 int dst, src, size;
1237 Glyph *line;
1238
1239 LIMIT(n, 0, term.col - term.c.x);
1240
1241 dst = term.c.x + n;
1242 src = term.c.x;
1243 size = term.col - dst;
1244 line = term.line[term.c.y];
1245
1246 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1247 tclearregion(src, term.c.y, dst - 1, term.c.y);
1248 }
1249
1250 void
1251 tinsertblankline(int n)
1252 {
1253 if (BETWEEN(term.c.y, term.top, term.bot))
1254 tscrolldown(term.c.y, n);
1255 }
1256
1257 void
1258 tdeleteline(int n)
1259 {
1260 if (BETWEEN(term.c.y, term.top, term.bot))
1261 tscrollup(term.c.y, n);
1262 }
1263
1264 int32_t
1265 tdefcolor(int *attr, int *npar, int l)
1266 {
1267 int32_t idx = -1;
1268 uint r, g, b;
1269
1270 switch (attr[*npar + 1]) {
1271 case 2: /* direct color in RGB space */
1272 if (*npar + 4 >= l) {
1273 fprintf(stderr,
1274 "erresc(38): Incorrect number of parameters (%d)\n",
1275 *npar);
1276 break;
1277 }
1278 r = attr[*npar + 2];
1279 g = attr[*npar + 3];
1280 b = attr[*npar + 4];
1281 *npar += 4;
1282 if (!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1283 fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
1284 r, g, b);
1285 else
1286 idx = TRUECOLOR(r, g, b);
1287 break;
1288 case 5: /* indexed color */
1289 if (*npar + 2 >= l) {
1290 fprintf(stderr,
1291 "erresc(38): Incorrect number of parameters (%d)\n",
1292 *npar);
1293 break;
1294 }
1295 *npar += 2;
1296 if (!BETWEEN(attr[*npar], 0, 255))
1297 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1298 else
1299 idx = attr[*npar];
1300 break;
1301 case 0: /* implemented defined (only foreground) */
1302 case 1: /* transparent */
1303 case 3: /* direct color in CMY space */
1304 case 4: /* direct color in CMYK space */
1305 default:
1306 fprintf(stderr,
1307 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1308 break;
1309 }
1310
1311 return idx;
1312 }
1313
1314 void
1315 tsetattr(int *attr, int l)
1316 {
1317 int i;
1318 int32_t idx;
1319
1320 for (i = 0; i < l; i++) {
1321 switch (attr[i]) {
1322 case 0:
1323 term.c.attr.mode &= ~(
1324 ATTR_BOLD |
1325 ATTR_FAINT |
1326 ATTR_ITALIC |
1327 ATTR_UNDERLINE |
1328 ATTR_BLINK |
1329 ATTR_REVERSE |
1330 ATTR_INVISIBLE |
1331 ATTR_STRUCK );
1332 term.c.attr.fg = defaultfg;
1333 term.c.attr.bg = defaultbg;
1334 break;
1335 case 1:
1336 term.c.attr.mode |= ATTR_BOLD;
1337 break;
1338 case 2:
1339 term.c.attr.mode |= ATTR_FAINT;
1340 break;
1341 case 3:
1342 term.c.attr.mode |= ATTR_ITALIC;
1343 break;
1344 case 4:
1345 term.c.attr.mode |= ATTR_UNDERLINE;
1346 break;
1347 case 5: /* slow blink */
1348 /* FALLTHROUGH */
1349 case 6: /* rapid blink */
1350 term.c.attr.mode |= ATTR_BLINK;
1351 break;
1352 case 7:
1353 term.c.attr.mode |= ATTR_REVERSE;
1354 break;
1355 case 8:
1356 term.c.attr.mode |= ATTR_INVISIBLE;
1357 break;
1358 case 9:
1359 term.c.attr.mode |= ATTR_STRUCK;
1360 break;
1361 case 22:
1362 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1363 break;
1364 case 23:
1365 term.c.attr.mode &= ~ATTR_ITALIC;
1366 break;
1367 case 24:
1368 term.c.attr.mode &= ~ATTR_UNDERLINE;
1369 break;
1370 case 25:
1371 term.c.attr.mode &= ~ATTR_BLINK;
1372 break;
1373 case 27:
1374 term.c.attr.mode &= ~ATTR_REVERSE;
1375 break;
1376 case 28:
1377 term.c.attr.mode &= ~ATTR_INVISIBLE;
1378 break;
1379 case 29:
1380 term.c.attr.mode &= ~ATTR_STRUCK;
1381 break;
1382 case 38:
1383 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1384 term.c.attr.fg = idx;
1385 break;
1386 case 39:
1387 term.c.attr.fg = defaultfg;
1388 break;
1389 case 48:
1390 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1391 term.c.attr.bg = idx;
1392 break;
1393 case 49:
1394 term.c.attr.bg = defaultbg;
1395 break;
1396 default:
1397 if (BETWEEN(attr[i], 30, 37)) {
1398 term.c.attr.fg = attr[i] - 30;
1399 } else if (BETWEEN(attr[i], 40, 47)) {
1400 term.c.attr.bg = attr[i] - 40;
1401 } else if (BETWEEN(attr[i], 90, 97)) {
1402 term.c.attr.fg = attr[i] - 90 + 8;
1403 } else if (BETWEEN(attr[i], 100, 107)) {
1404 term.c.attr.bg = attr[i] - 100 + 8;
1405 } else {
1406 fprintf(stderr,
1407 "erresc(default): gfx attr %d unknown\n",
1408 attr[i]), csidump();
1409 }
1410 break;
1411 }
1412 }
1413 }
1414
1415 void
1416 tsetscroll(int t, int b)
1417 {
1418 int temp;
1419
1420 LIMIT(t, 0, term.row-1);
1421 LIMIT(b, 0, term.row-1);
1422 if (t > b) {
1423 temp = t;
1424 t = b;
1425 b = temp;
1426 }
1427 term.top = t;
1428 term.bot = b;
1429 }
1430
1431 void
1432 tsetmode(int priv, int set, int *args, int narg)
1433 {
1434 int *lim, mode;
1435 int alt;
1436
1437 for (lim = args + narg; args < lim; ++args) {
1438 if (priv) {
1439 switch (*args) {
1440 case 1: /* DECCKM -- Cursor key */
1441 MODBIT(term.mode, set, MODE_APPCURSOR);
1442 break;
1443 case 5: /* DECSCNM -- Reverse video */
1444 mode = term.mode;
1445 MODBIT(term.mode, set, MODE_REVERSE);
1446 if (mode != term.mode)
1447 redraw();
1448 break;
1449 case 6: /* DECOM -- Origin */
1450 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1451 tmoveato(0, 0);
1452 break;
1453 case 7: /* DECAWM -- Auto wrap */
1454 MODBIT(term.mode, set, MODE_WRAP);
1455 break;
1456 case 0: /* Error (IGNORED) */
1457 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1458 case 3: /* DECCOLM -- Column (IGNORED) */
1459 case 4: /* DECSCLM -- Scroll (IGNORED) */
1460 case 8: /* DECARM -- Auto repeat (IGNORED) */
1461 case 18: /* DECPFF -- Printer feed (IGNORED) */
1462 case 19: /* DECPEX -- Printer extent (IGNORED) */
1463 case 42: /* DECNRCM -- National characters (IGNORED) */
1464 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1465 break;
1466 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1467 MODBIT(term.mode, !set, MODE_HIDE);
1468 break;
1469 case 9: /* X10 mouse compatibility mode */
1470 xsetpointermotion(0);
1471 MODBIT(term.mode, 0, MODE_MOUSE);
1472 MODBIT(term.mode, set, MODE_MOUSEX10);
1473 break;
1474 case 1000: /* 1000: report button press */
1475 xsetpointermotion(0);
1476 MODBIT(term.mode, 0, MODE_MOUSE);
1477 MODBIT(term.mode, set, MODE_MOUSEBTN);
1478 break;
1479 case 1002: /* 1002: report motion on button press */
1480 xsetpointermotion(0);
1481 MODBIT(term.mode, 0, MODE_MOUSE);
1482 MODBIT(term.mode, set, MODE_MOUSEMOTION);
1483 break;
1484 case 1003: /* 1003: enable all mouse motions */
1485 xsetpointermotion(set);
1486 MODBIT(term.mode, 0, MODE_MOUSE);
1487 MODBIT(term.mode, set, MODE_MOUSEMANY);
1488 break;
1489 case 1004: /* 1004: send focus events to tty */
1490 MODBIT(term.mode, set, MODE_FOCUS);
1491 break;
1492 case 1006: /* 1006: extended reporting mode */
1493 MODBIT(term.mode, set, MODE_MOUSESGR);
1494 break;
1495 case 1034:
1496 MODBIT(term.mode, set, MODE_8BIT);
1497 break;
1498 case 1049: /* swap screen & set/restore cursor as xterm */
1499 if (!allowaltscreen)
1500 break;
1501 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1502 /* FALLTHROUGH */
1503 case 47: /* swap screen */
1504 case 1047:
1505 if (!allowaltscreen)
1506 break;
1507 alt = IS_SET(MODE_ALTSCREEN);
1508 if (alt) {
1509 tclearregion(0, 0, term.col-1,
1510 term.row-1);
1511 }
1512 if (set ^ alt) /* set is always 1 or 0 */
1513 tswapscreen();
1514 if (*args != 1049)
1515 break;
1516 /* FALLTHROUGH */
1517 case 1048:
1518 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1519 break;
1520 case 2004: /* 2004: bracketed paste mode */
1521 MODBIT(term.mode, set, MODE_BRCKTPASTE);
1522 break;
1523 /* Not implemented mouse modes. See comments there. */
1524 case 1001: /* mouse highlight mode; can hang the
1525 terminal by design when implemented. */
1526 case 1005: /* UTF-8 mouse mode; will confuse
1527 applications not supporting UTF-8
1528 and luit. */
1529 case 1015: /* urxvt mangled mouse mode; incompatible
1530 and can be mistaken for other control
1531 codes. */
1532 default:
1533 fprintf(stderr,
1534 "erresc: unknown private set/reset mode %d\n",
1535 *args);
1536 break;
1537 }
1538 } else {
1539 switch (*args) {
1540 case 0: /* Error (IGNORED) */
1541 break;
1542 case 2: /* KAM -- keyboard action */
1543 MODBIT(term.mode, set, MODE_KBDLOCK);
1544 break;
1545 case 4: /* IRM -- Insertion-replacement */
1546 MODBIT(term.mode, set, MODE_INSERT);
1547 break;
1548 case 12: /* SRM -- Send/Receive */
1549 MODBIT(term.mode, !set, MODE_ECHO);
1550 break;
1551 case 20: /* LNM -- Linefeed/new line */
1552 MODBIT(term.mode, set, MODE_CRLF);
1553 break;
1554 default:
1555 fprintf(stderr,
1556 "erresc: unknown set/reset mode %d\n",
1557 *args);
1558 break;
1559 }
1560 }
1561 }
1562 }
1563
1564 void
1565 csihandle(void)
1566 {
1567 char buf[40];
1568 int len;
1569
1570 switch (csiescseq.mode[0]) {
1571 default:
1572 unknown:
1573 fprintf(stderr, "erresc: unknown csi ");
1574 csidump();
1575 /* die(""); */
1576 break;
1577 case '@': /* ICH -- Insert <n> blank char */
1578 DEFAULT(csiescseq.arg[0], 1);
1579 tinsertblank(csiescseq.arg[0]);
1580 break;
1581 case 'A': /* CUU -- Cursor <n> Up */
1582 DEFAULT(csiescseq.arg[0], 1);
1583 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1584 break;
1585 case 'B': /* CUD -- Cursor <n> Down */
1586 case 'e': /* VPR --Cursor <n> Down */
1587 DEFAULT(csiescseq.arg[0], 1);
1588 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1589 break;
1590 case 'i': /* MC -- Media Copy */
1591 switch (csiescseq.arg[0]) {
1592 case 0:
1593 tdump();
1594 break;
1595 case 1:
1596 tdumpline(term.c.y);
1597 break;
1598 case 2:
1599 tdumpsel();
1600 break;
1601 case 4:
1602 term.mode &= ~MODE_PRINT;
1603 break;
1604 case 5:
1605 term.mode |= MODE_PRINT;
1606 break;
1607 }
1608 break;
1609 case 'c': /* DA -- Device Attributes */
1610 if (csiescseq.arg[0] == 0)
1611 ttywrite(vtiden, sizeof(vtiden) - 1);
1612 break;
1613 case 'C': /* CUF -- Cursor <n> Forward */
1614 case 'a': /* HPR -- Cursor <n> Forward */
1615 DEFAULT(csiescseq.arg[0], 1);
1616 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1617 break;
1618 case 'D': /* CUB -- Cursor <n> Backward */
1619 DEFAULT(csiescseq.arg[0], 1);
1620 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1621 break;
1622 case 'E': /* CNL -- Cursor <n> Down and first col */
1623 DEFAULT(csiescseq.arg[0], 1);
1624 tmoveto(0, term.c.y+csiescseq.arg[0]);
1625 break;
1626 case 'F': /* CPL -- Cursor <n> Up and first col */
1627 DEFAULT(csiescseq.arg[0], 1);
1628 tmoveto(0, term.c.y-csiescseq.arg[0]);
1629 break;
1630 case 'g': /* TBC -- Tabulation clear */
1631 switch (csiescseq.arg[0]) {
1632 case 0: /* clear current tab stop */
1633 term.tabs[term.c.x] = 0;
1634 break;
1635 case 3: /* clear all the tabs */
1636 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1637 break;
1638 default:
1639 goto unknown;
1640 }
1641 break;
1642 case 'G': /* CHA -- Move to <col> */
1643 case '`': /* HPA */
1644 DEFAULT(csiescseq.arg[0], 1);
1645 tmoveto(csiescseq.arg[0]-1, term.c.y);
1646 break;
1647 case 'H': /* CUP -- Move to <row> <col> */
1648 case 'f': /* HVP */
1649 DEFAULT(csiescseq.arg[0], 1);
1650 DEFAULT(csiescseq.arg[1], 1);
1651 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1652 break;
1653 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1654 DEFAULT(csiescseq.arg[0], 1);
1655 tputtab(csiescseq.arg[0]);
1656 break;
1657 case 'J': /* ED -- Clear screen */
1658 selclear();
1659 switch (csiescseq.arg[0]) {
1660 case 0: /* below */
1661 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1662 if (term.c.y < term.row-1) {
1663 tclearregion(0, term.c.y+1, term.col-1,
1664 term.row-1);
1665 }
1666 break;
1667 case 1: /* above */
1668 if (term.c.y > 1)
1669 tclearregion(0, 0, term.col-1, term.c.y-1);
1670 tclearregion(0, term.c.y, term.c.x, term.c.y);
1671 break;
1672 case 2: /* all */
1673 tclearregion(0, 0, term.col-1, term.row-1);
1674 break;
1675 default:
1676 goto unknown;
1677 }
1678 break;
1679 case 'K': /* EL -- Clear line */
1680 switch (csiescseq.arg[0]) {
1681 case 0: /* right */
1682 tclearregion(term.c.x, term.c.y, term.col-1,
1683 term.c.y);
1684 break;
1685 case 1: /* left */
1686 tclearregion(0, term.c.y, term.c.x, term.c.y);
1687 break;
1688 case 2: /* all */
1689 tclearregion(0, term.c.y, term.col-1, term.c.y);
1690 break;
1691 }
1692 break;
1693 case 'S': /* SU -- Scroll <n> line up */
1694 DEFAULT(csiescseq.arg[0], 1);
1695 tscrollup(term.top, csiescseq.arg[0]);
1696 break;
1697 case 'T': /* SD -- Scroll <n> line down */
1698 DEFAULT(csiescseq.arg[0], 1);
1699 tscrolldown(term.top, csiescseq.arg[0]);
1700 break;
1701 case 'L': /* IL -- Insert <n> blank lines */
1702 DEFAULT(csiescseq.arg[0], 1);
1703 tinsertblankline(csiescseq.arg[0]);
1704 break;
1705 case 'l': /* RM -- Reset Mode */
1706 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1707 break;
1708 case 'M': /* DL -- Delete <n> lines */
1709 DEFAULT(csiescseq.arg[0], 1);
1710 tdeleteline(csiescseq.arg[0]);
1711 break;
1712 case 'X': /* ECH -- Erase <n> char */
1713 DEFAULT(csiescseq.arg[0], 1);
1714 tclearregion(term.c.x, term.c.y,
1715 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1716 break;
1717 case 'P': /* DCH -- Delete <n> char */
1718 DEFAULT(csiescseq.arg[0], 1);
1719 tdeletechar(csiescseq.arg[0]);
1720 break;
1721 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1722 DEFAULT(csiescseq.arg[0], 1);
1723 tputtab(-csiescseq.arg[0]);
1724 break;
1725 case 'd': /* VPA -- Move to <row> */
1726 DEFAULT(csiescseq.arg[0], 1);
1727 tmoveato(term.c.x, csiescseq.arg[0]-1);
1728 break;
1729 case 'h': /* SM -- Set terminal mode */
1730 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1731 break;
1732 case 'm': /* SGR -- Terminal attribute (color) */
1733 tsetattr(csiescseq.arg, csiescseq.narg);
1734 break;
1735 case 'n': /* DSR – Device Status Report (cursor position) */
1736 if (csiescseq.arg[0] == 6) {
1737 len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
1738 term.c.y+1, term.c.x+1);
1739 ttywrite(buf, len);
1740 }
1741 break;
1742 case 'r': /* DECSTBM -- Set Scrolling Region */
1743 if (csiescseq.priv) {
1744 goto unknown;
1745 } else {
1746 DEFAULT(csiescseq.arg[0], 1);
1747 DEFAULT(csiescseq.arg[1], term.row);
1748 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1749 tmoveato(0, 0);
1750 }
1751 break;
1752 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1753 tcursor(CURSOR_SAVE);
1754 break;
1755 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1756 tcursor(CURSOR_LOAD);
1757 break;
1758 case ' ':
1759 switch (csiescseq.mode[1]) {
1760 case 'q': /* DECSCUSR -- Set Cursor Style */
1761 DEFAULT(csiescseq.arg[0], 1);
1762 if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
1763 goto unknown;
1764 }
1765 win.cursor = csiescseq.arg[0];
1766 break;
1767 default:
1768 goto unknown;
1769 }
1770 break;
1771 }
1772 }
1773
1774 void
1775 csidump(void)
1776 {
1777 int i;
1778 uint c;
1779
1780 fprintf(stderr, "ESC[");
1781 for (i = 0; i < csiescseq.len; i++) {
1782 c = csiescseq.buf[i] & 0xff;
1783 if (isprint(c)) {
1784 putc(c, stderr);
1785 } else if (c == '\n') {
1786 fprintf(stderr, "(\\n)");
1787 } else if (c == '\r') {
1788 fprintf(stderr, "(\\r)");
1789 } else if (c == 0x1b) {
1790 fprintf(stderr, "(\\e)");
1791 } else {
1792 fprintf(stderr, "(%02x)", c);
1793 }
1794 }
1795 putc('\n', stderr);
1796 }
1797
1798 void
1799 csireset(void)
1800 {
1801 memset(&csiescseq, 0, sizeof(csiescseq));
1802 }
1803
1804 void
1805 strhandle(void)
1806 {
1807 char *p = NULL;
1808 int j, narg, par;
1809
1810 term.esc &= ~(ESC_STR_END|ESC_STR);
1811 strparse();
1812 par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
1813
1814 switch (strescseq.type) {
1815 case ']': /* OSC -- Operating System Command */
1816 switch (par) {
1817 case 0:
1818 case 1:
1819 case 2:
1820 if (narg > 1)
1821 xsettitle(strescseq.args[1]);
1822 return;
1823 case 4: /* color set */
1824 if (narg < 3)
1825 break;
1826 p = strescseq.args[2];
1827 /* FALLTHROUGH */
1828 case 104: /* color reset, here p = NULL */
1829 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1830 if (xsetcolorname(j, p)) {
1831 fprintf(stderr, "erresc: invalid color %s\n", p);
1832 } else {
1833 /*
1834 * TODO if defaultbg color is changed, borders
1835 * are dirty
1836 */
1837 redraw();
1838 }
1839 return;
1840 }
1841 break;
1842 case 'k': /* old title set compatibility */
1843 xsettitle(strescseq.args[0]);
1844 return;
1845 case 'P': /* DCS -- Device Control String */
1846 term.mode |= ESC_DCS;
1847 case '_': /* APC -- Application Program Command */
1848 case '^': /* PM -- Privacy Message */
1849 return;
1850 }
1851
1852 fprintf(stderr, "erresc: unknown str ");
1853 strdump();
1854 }
1855
1856 void
1857 strparse(void)
1858 {
1859 int c;
1860 char *p = strescseq.buf;
1861
1862 strescseq.narg = 0;
1863 strescseq.buf[strescseq.len] = '\0';
1864
1865 if (*p == '\0')
1866 return;
1867
1868 while (strescseq.narg < STR_ARG_SIZ) {
1869 strescseq.args[strescseq.narg++] = p;
1870 while ((c = *p) != ';' && c != '\0')
1871 ++p;
1872 if (c == '\0')
1873 return;
1874 *p++ = '\0';
1875 }
1876 }
1877
1878 void
1879 strdump(void)
1880 {
1881 int i;
1882 uint c;
1883
1884 fprintf(stderr, "ESC%c", strescseq.type);
1885 for (i = 0; i < strescseq.len; i++) {
1886 c = strescseq.buf[i] & 0xff;
1887 if (c == '\0') {
1888 putc('\n', stderr);
1889 return;
1890 } else if (isprint(c)) {
1891 putc(c, stderr);
1892 } else if (c == '\n') {
1893 fprintf(stderr, "(\\n)");
1894 } else if (c == '\r') {
1895 fprintf(stderr, "(\\r)");
1896 } else if (c == 0x1b) {
1897 fprintf(stderr, "(\\e)");
1898 } else {
1899 fprintf(stderr, "(%02x)", c);
1900 }
1901 }
1902 fprintf(stderr, "ESC\\\n");
1903 }
1904
1905 void
1906 strreset(void)
1907 {
1908 memset(&strescseq, 0, sizeof(strescseq));
1909 }
1910
1911 void
1912 sendbreak(const Arg *arg)
1913 {
1914 if (tcsendbreak(cmdfd, 0))
1915 perror("Error sending break");
1916 }
1917
1918 void
1919 tprinter(char *s, size_t len)
1920 {
1921 if (iofd != -1 && xwrite(iofd, s, len) < 0) {
1922 fprintf(stderr, "Error writing in %s:%s\n",
1923 opt_io, strerror(errno));
1924 close(iofd);
1925 iofd = -1;
1926 }
1927 }
1928
1929 void
1930 iso14755(const Arg *arg)
1931 {
1932 unsigned long id = xwinid();
1933 char cmd[sizeof(ISO14755CMD) + NUMMAXLEN(id)];
1934 FILE *p;
1935 char *us, *e, codepoint[9], uc[UTF_SIZ];
1936 unsigned long utf32;
1937
1938 snprintf(cmd, sizeof(cmd), ISO14755CMD, id);
1939 if (!(p = popen(cmd, "r")))
1940 return;
1941
1942 us = fgets(codepoint, sizeof(codepoint), p);
1943 pclose(p);
1944
1945 if (!us || *us == '\0' || *us == '-' || strlen(us) > 7)
1946 return;
1947 if ((utf32 = strtoul(us, &e, 16)) == ULONG_MAX ||
1948 (*e != '\n' && *e != '\0'))
1949 return;
1950
1951 ttysend(uc, utf8encode(utf32, uc));
1952 }
1953
1954 void
1955 toggleprinter(const Arg *arg)
1956 {
1957 term.mode ^= MODE_PRINT;
1958 }
1959
1960 void
1961 printscreen(const Arg *arg)
1962 {
1963 tdump();
1964 }
1965
1966 void
1967 printsel(const Arg *arg)
1968 {
1969 tdumpsel();
1970 }
1971
1972 void
1973 tdumpsel(void)
1974 {
1975 char *ptr;
1976
1977 if ((ptr = getsel())) {
1978 tprinter(ptr, strlen(ptr));
1979 free(ptr);
1980 }
1981 }
1982
1983 void
1984 tdumpline(int n)
1985 {
1986 char buf[UTF_SIZ];
1987 Glyph *bp, *end;
1988
1989 bp = &term.line[n][0];
1990 end = &bp[MIN(tlinelen(n), term.col) - 1];
1991 if (bp != end || bp->u != ' ') {
1992 for ( ;bp <= end; ++bp)
1993 tprinter(buf, utf8encode(bp->u, buf));
1994 }
1995 tprinter("\n", 1);
1996 }
1997
1998 void
1999 tdump(void)
2000 {
2001 int i;
2002
2003 for (i = 0; i < term.row; ++i)
2004 tdumpline(i);
2005 }
2006
2007 void
2008 tputtab(int n)
2009 {
2010 uint x = term.c.x;
2011
2012 if (n > 0) {
2013 while (x < term.col && n--)
2014 for (++x; x < term.col && !term.tabs[x]; ++x)
2015 /* nothing */ ;
2016 } else if (n < 0) {
2017 while (x > 0 && n++)
2018 for (--x; x > 0 && !term.tabs[x]; --x)
2019 /* nothing */ ;
2020 }
2021 term.c.x = LIMIT(x, 0, term.col-1);
2022 }
2023
2024 void
2025 techo(Rune u)
2026 {
2027 if (ISCONTROL(u)) { /* control code */
2028 if (u & 0x80) {
2029 u &= 0x7f;
2030 tputc('^');
2031 tputc('[');
2032 } else if (u != '\n' && u != '\r' && u != '\t') {
2033 u ^= 0x40;
2034 tputc('^');
2035 }
2036 }
2037 tputc(u);
2038 }
2039
2040 void
2041 tdefutf8(char ascii)
2042 {
2043 if (ascii == 'G')
2044 term.mode |= MODE_UTF8;
2045 else if (ascii == '@')
2046 term.mode &= ~MODE_UTF8;
2047 }
2048
2049 void
2050 tdeftran(char ascii)
2051 {
2052 static char cs[] = "0B";
2053 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2054 char *p;
2055
2056 if ((p = strchr(cs, ascii)) == NULL) {
2057 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2058 } else {
2059 term.trantbl[term.icharset] = vcs[p - cs];
2060 }
2061 }
2062
2063 void
2064 tdectest(char c)
2065 {
2066 int x, y;
2067
2068 if (c == '8') { /* DEC screen alignment test. */
2069 for (x = 0; x < term.col; ++x) {
2070 for (y = 0; y < term.row; ++y)
2071 tsetchar('E', &term.c.attr, x, y);
2072 }
2073 }
2074 }
2075
2076 void
2077 tstrsequence(uchar c)
2078 {
2079 strreset();
2080
2081 switch (c) {
2082 case 0x90: /* DCS -- Device Control String */
2083 c = 'P';
2084 term.esc |= ESC_DCS;
2085 break;
2086 case 0x9f: /* APC -- Application Program Command */
2087 c = '_';
2088 break;
2089 case 0x9e: /* PM -- Privacy Message */
2090 c = '^';
2091 break;
2092 case 0x9d: /* OSC -- Operating System Command */
2093 c = ']';
2094 break;
2095 }
2096 strescseq.type = c;
2097 term.esc |= ESC_STR;
2098 }
2099
2100 void
2101 tcontrolcode(uchar ascii)
2102 {
2103 switch (ascii) {
2104 case '\t': /* HT */
2105 tputtab(1);
2106 return;
2107 case '\b': /* BS */
2108 tmoveto(term.c.x-1, term.c.y);
2109 return;
2110 case '\r': /* CR */
2111 tmoveto(0, term.c.y);
2112 return;
2113 case '\f': /* LF */
2114 case '\v': /* VT */
2115 case '\n': /* LF */
2116 /* go to first col if the mode is set */
2117 tnewline(IS_SET(MODE_CRLF));
2118 return;
2119 case '\a': /* BEL */
2120 if (term.esc & ESC_STR_END) {
2121 /* backwards compatibility to xterm */
2122 strhandle();
2123 } else {
2124 if (!(win.state & WIN_FOCUSED))
2125 xseturgency(1);
2126 if (bellvolume)
2127 xbell(bellvolume);
2128 }
2129 break;
2130 case '\033': /* ESC */
2131 csireset();
2132 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2133 term.esc |= ESC_START;
2134 return;
2135 case '\016': /* SO (LS1 -- Locking shift 1) */
2136 case '\017': /* SI (LS0 -- Locking shift 0) */
2137 term.charset = 1 - (ascii - '\016');
2138 return;
2139 case '\032': /* SUB */
2140 tsetchar('?', &term.c.attr, term.c.x, term.c.y);
2141 case '\030': /* CAN */
2142 csireset();
2143 break;
2144 case '\005': /* ENQ (IGNORED) */
2145 case '\000': /* NUL (IGNORED) */
2146 case '\021': /* XON (IGNORED) */
2147 case '\023': /* XOFF (IGNORED) */
2148 case 0177: /* DEL (IGNORED) */
2149 return;
2150 case 0x80: /* TODO: PAD */
2151 case 0x81: /* TODO: HOP */
2152 case 0x82: /* TODO: BPH */
2153 case 0x83: /* TODO: NBH */
2154 case 0x84: /* TODO: IND */
2155 break;
2156 case 0x85: /* NEL -- Next line */
2157 tnewline(1); /* always go to first col */
2158 break;
2159 case 0x86: /* TODO: SSA */
2160 case 0x87: /* TODO: ESA */
2161 break;
2162 case 0x88: /* HTS -- Horizontal tab stop */
2163 term.tabs[term.c.x] = 1;
2164 break;
2165 case 0x89: /* TODO: HTJ */
2166 case 0x8a: /* TODO: VTS */
2167 case 0x8b: /* TODO: PLD */
2168 case 0x8c: /* TODO: PLU */
2169 case 0x8d: /* TODO: RI */
2170 case 0x8e: /* TODO: SS2 */
2171 case 0x8f: /* TODO: SS3 */
2172 case 0x91: /* TODO: PU1 */
2173 case 0x92: /* TODO: PU2 */
2174 case 0x93: /* TODO: STS */
2175 case 0x94: /* TODO: CCH */
2176 case 0x95: /* TODO: MW */
2177 case 0x96: /* TODO: SPA */
2178 case 0x97: /* TODO: EPA */
2179 case 0x98: /* TODO: SOS */
2180 case 0x99: /* TODO: SGCI */
2181 break;
2182 case 0x9a: /* DECID -- Identify Terminal */
2183 ttywrite(vtiden, sizeof(vtiden) - 1);
2184 break;
2185 case 0x9b: /* TODO: CSI */
2186 case 0x9c: /* TODO: ST */
2187 break;
2188 case 0x90: /* DCS -- Device Control String */
2189 case 0x9d: /* OSC -- Operating System Command */
2190 case 0x9e: /* PM -- Privacy Message */
2191 case 0x9f: /* APC -- Application Program Command */
2192 tstrsequence(ascii);
2193 return;
2194 }
2195 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2196 term.esc &= ~(ESC_STR_END|ESC_STR);
2197 }
2198
2199 /*
2200 * returns 1 when the sequence is finished and it hasn't to read
2201 * more characters for this sequence, otherwise 0
2202 */
2203 int
2204 eschandle(uchar ascii)
2205 {
2206 switch (ascii) {
2207 case '[':
2208 term.esc |= ESC_CSI;
2209 return 0;
2210 case '#':
2211 term.esc |= ESC_TEST;
2212 return 0;
2213 case '%':
2214 term.esc |= ESC_UTF8;
2215 return 0;
2216 case 'P': /* DCS -- Device Control String */
2217 case '_': /* APC -- Application Program Command */
2218 case '^': /* PM -- Privacy Message */
2219 case ']': /* OSC -- Operating System Command */
2220 case 'k': /* old title set compatibility */
2221 tstrsequence(ascii);
2222 return 0;
2223 case 'n': /* LS2 -- Locking shift 2 */
2224 case 'o': /* LS3 -- Locking shift 3 */
2225 term.charset = 2 + (ascii - 'n');
2226 break;
2227 case '(': /* GZD4 -- set primary charset G0 */
2228 case ')': /* G1D4 -- set secondary charset G1 */
2229 case '*': /* G2D4 -- set tertiary charset G2 */
2230 case '+': /* G3D4 -- set quaternary charset G3 */
2231 term.icharset = ascii - '(';
2232 term.esc |= ESC_ALTCHARSET;
2233 return 0;
2234 case 'D': /* IND -- Linefeed */
2235 if (term.c.y == term.bot) {
2236 tscrollup(term.top, 1);
2237 } else {
2238 tmoveto(term.c.x, term.c.y+1);
2239 }
2240 break;
2241 case 'E': /* NEL -- Next line */
2242 tnewline(1); /* always go to first col */
2243 break;
2244 case 'H': /* HTS -- Horizontal tab stop */
2245 term.tabs[term.c.x] = 1;
2246 break;
2247 case 'M': /* RI -- Reverse index */
2248 if (term.c.y == term.top) {
2249 tscrolldown(term.top, 1);
2250 } else {
2251 tmoveto(term.c.x, term.c.y-1);
2252 }
2253 break;
2254 case 'Z': /* DECID -- Identify Terminal */
2255 ttywrite(vtiden, sizeof(vtiden) - 1);
2256 break;
2257 case 'c': /* RIS -- Reset to inital state */
2258 treset();
2259 resettitle();
2260 xloadcols();
2261 break;
2262 case '=': /* DECPAM -- Application keypad */
2263 term.mode |= MODE_APPKEYPAD;
2264 break;
2265 case '>': /* DECPNM -- Normal keypad */
2266 term.mode &= ~MODE_APPKEYPAD;
2267 break;
2268 case '7': /* DECSC -- Save Cursor */
2269 tcursor(CURSOR_SAVE);
2270 break;
2271 case '8': /* DECRC -- Restore Cursor */
2272 tcursor(CURSOR_LOAD);
2273 break;
2274 case '\\': /* ST -- String Terminator */
2275 if (term.esc & ESC_STR_END)
2276 strhandle();
2277 break;
2278 default:
2279 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2280 (uchar) ascii, isprint(ascii)? ascii:'.');
2281 break;
2282 }
2283 return 1;
2284 }
2285
2286 void
2287 tputc(Rune u)
2288 {
2289 char c[UTF_SIZ];
2290 int control;
2291 int width, len;
2292 Glyph *gp;
2293
2294 control = ISCONTROL(u);
2295 if (!IS_SET(MODE_UTF8) && !IS_SET(MODE_SIXEL)) {
2296 c[0] = u;
2297 width = len = 1;
2298 } else {
2299 len = utf8encode(u, c);
2300 if (!control && (width = wcwidth(u)) == -1) {
2301 memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
2302 width = 1;
2303 }
2304 }
2305
2306 if (IS_SET(MODE_PRINT))
2307 tprinter(c, len);
2308
2309 /*
2310 * STR sequence must be checked before anything else
2311 * because it uses all following characters until it
2312 * receives a ESC, a SUB, a ST or any other C1 control
2313 * character.
2314 */
2315 if (term.esc & ESC_STR) {
2316 if (u == '\a' || u == 030 || u == 032 || u == 033 ||
2317 ISCONTROLC1(u)) {
2318 term.esc &= ~(ESC_START|ESC_STR|ESC_DCS);
2319 if (IS_SET(MODE_SIXEL)) {
2320 /* TODO: render sixel */;
2321 term.mode &= ~MODE_SIXEL;
2322 return;
2323 }
2324 term.esc |= ESC_STR_END;
2325 goto check_control_code;
2326 }
2327
2328
2329 if (IS_SET(MODE_SIXEL)) {
2330 /* TODO: implement sixel mode */
2331 return;
2332 }
2333 if (term.esc&ESC_DCS && strescseq.len == 0 && u == 'q')
2334 term.mode |= MODE_SIXEL;
2335
2336 if (strescseq.len+len >= sizeof(strescseq.buf)-1) {
2337 /*
2338 * Here is a bug in terminals. If the user never sends
2339 * some code to stop the str or esc command, then st
2340 * will stop responding. But this is better than
2341 * silently failing with unknown characters. At least
2342 * then users will report back.
2343 *
2344 * In the case users ever get fixed, here is the code:
2345 */
2346 /*
2347 * term.esc = 0;
2348 * strhandle();
2349 */
2350 return;
2351 }
2352
2353 memmove(&strescseq.buf[strescseq.len], c, len);
2354 strescseq.len += len;
2355 return;
2356 }
2357
2358 check_control_code:
2359 /*
2360 * Actions of control codes must be performed as soon they arrive
2361 * because they can be embedded inside a control sequence, and
2362 * they must not cause conflicts with sequences.
2363 */
2364 if (control) {
2365 tcontrolcode(u);
2366 /*
2367 * control codes are not shown ever
2368 */
2369 return;
2370 } else if (term.esc & ESC_START) {
2371 if (term.esc & ESC_CSI) {
2372 csiescseq.buf[csiescseq.len++] = u;
2373 if (BETWEEN(u, 0x40, 0x7E)
2374 || csiescseq.len >= \
2375 sizeof(csiescseq.buf)-1) {
2376 term.esc = 0;
2377 csiparse();
2378 csihandle();
2379 }
2380 return;
2381 } else if (term.esc & ESC_UTF8) {
2382 tdefutf8(u);
2383 } else if (term.esc & ESC_ALTCHARSET) {
2384 tdeftran(u);
2385 } else if (term.esc & ESC_TEST) {
2386 tdectest(u);
2387 } else {
2388 if (!eschandle(u))
2389 return;
2390 /* sequence already finished */
2391 }
2392 term.esc = 0;
2393 /*
2394 * All characters which form part of a sequence are not
2395 * printed
2396 */
2397 return;
2398 }
2399 if (sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
2400 selclear();
2401
2402 gp = &term.line[term.c.y][term.c.x];
2403 if (IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2404 gp->mode |= ATTR_WRAP;
2405 tnewline(1);
2406 gp = &term.line[term.c.y][term.c.x];
2407 }
2408
2409 if (IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2410 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2411
2412 if (term.c.x+width > term.col) {
2413 tnewline(1);
2414 gp = &term.line[term.c.y][term.c.x];
2415 }
2416
2417 tsetchar(u, &term.c.attr, term.c.x, term.c.y);
2418
2419 if (width == 2) {
2420 gp->mode |= ATTR_WIDE;
2421 if (term.c.x+1 < term.col) {
2422 gp[1].u = '\0';
2423 gp[1].mode = ATTR_WDUMMY;
2424 }
2425 }
2426 if (term.c.x+width < term.col) {
2427 tmoveto(term.c.x+width, term.c.y);
2428 } else {
2429 term.c.state |= CURSOR_WRAPNEXT;
2430 }
2431 }
2432
2433 void
2434 tresize(int col, int row)
2435 {
2436 int i;
2437 int minrow = MIN(row, term.row);
2438 int mincol = MIN(col, term.col);
2439 int *bp;
2440 TCursor c;
2441
2442 if (col < 1 || row < 1) {
2443 fprintf(stderr,
2444 "tresize: error resizing to %dx%d\n", col, row);
2445 return;
2446 }
2447
2448 /*
2449 * slide screen to keep cursor where we expect it -
2450 * tscrollup would work here, but we can optimize to
2451 * memmove because we're freeing the earlier lines
2452 */
2453 for (i = 0; i <= term.c.y - row; i++) {
2454 free(term.line[i]);
2455 free(term.alt[i]);
2456 }
2457 /* ensure that both src and dst are not NULL */
2458 if (i > 0) {
2459 memmove(term.line, term.line + i, row * sizeof(Line));
2460 memmove(term.alt, term.alt + i, row * sizeof(Line));
2461 }
2462 for (i += row; i < term.row; i++) {
2463 free(term.line[i]);
2464 free(term.alt[i]);
2465 }
2466
2467 /* resize to new width */
2468 term.specbuf = xrealloc(term.specbuf, col * sizeof(GlyphFontSpec));
2469
2470 /* resize to new height */
2471 term.line = xrealloc(term.line, row * sizeof(Line));
2472 term.alt = xrealloc(term.alt, row * sizeof(Line));
2473 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2474 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2475
2476 /* resize each row to new width, zero-pad if needed */
2477 for (i = 0; i < minrow; i++) {
2478 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2479 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2480 }
2481
2482 /* allocate any new rows */
2483 for (/* i == minrow */; i < row; i++) {
2484 term.line[i] = xmalloc(col * sizeof(Glyph));
2485 term.alt[i] = xmalloc(col * sizeof(Glyph));
2486 }
2487 if (col > term.col) {
2488 bp = term.tabs + term.col;
2489
2490 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2491 while (--bp > term.tabs && !*bp)
2492 /* nothing */ ;
2493 for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2494 *bp = 1;
2495 }
2496 /* update terminal size */
2497 term.col = col;
2498 term.row = row;
2499 /* reset scrolling region */
2500 tsetscroll(0, row-1);
2501 /* make use of the LIMIT in tmoveto */
2502 tmoveto(term.c.x, term.c.y);
2503 /* Clearing both screens (it makes dirty all lines) */
2504 c = term.c;
2505 for (i = 0; i < 2; i++) {
2506 if (mincol < col && 0 < minrow) {
2507 tclearregion(mincol, 0, col - 1, minrow - 1);
2508 }
2509 if (0 < col && minrow < row) {
2510 tclearregion(0, minrow, col - 1, row - 1);
2511 }
2512 tswapscreen();
2513 tcursor(CURSOR_LOAD);
2514 }
2515 term.c = c;
2516 }
2517
2518 void
2519 zoom(const Arg *arg)
2520 {
2521 Arg larg;
2522
2523 larg.f = usedfontsize + arg->f;
2524 zoomabs(&larg);
2525 }
2526
2527 void
2528 zoomabs(const Arg *arg)
2529 {
2530 xunloadfonts();
2531 xloadfonts(usedfont, arg->f);
2532 cresize(0, 0);
2533 ttyresize();
2534 redraw();
2535 xhints();
2536 }
2537
2538 void
2539 zoomreset(const Arg *arg)
2540 {
2541 Arg larg;
2542
2543 if (defaultfontsize > 0) {
2544 larg.f = defaultfontsize;
2545 zoomabs(&larg);
2546 }
2547 }
2548
2549 void
2550 resettitle(void)
2551 {
2552 xsettitle(opt_title ? opt_title : "st");
2553 }
2554
2555 void
2556 redraw(void)
2557 {
2558 tfulldirt();
2559 draw();
2560 }
2561
2562 int
2563 match(uint mask, uint state)
2564 {
2565 return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
2566 }
2567
2568 void
2569 numlock(const Arg *dummy)
2570 {
2571 term.numlock ^= 1;
2572 }
2573
2574 char*
2575 kmap(KeySym k, uint state)
2576 {
2577 Key *kp;
2578 int i;
2579
2580 /* Check for mapped keys out of X11 function keys. */
2581 for (i = 0; i < LEN(mappedkeys); i++) {
2582 if (mappedkeys[i] == k)
2583 break;
2584 }
2585 if (i == LEN(mappedkeys)) {
2586 if ((k & 0xFFFF) < 0xFD00)
2587 return NULL;
2588 }
2589
2590 for (kp = key; kp < key + LEN(key); kp++) {
2591 if (kp->k != k)
2592 continue;
2593
2594 if (!match(kp->mask, state))
2595 continue;
2596
2597 if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
2598 continue;
2599 if (term.numlock && kp->appkey == 2)
2600 continue;
2601
2602 if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
2603 continue;
2604
2605 if (IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
2606 continue;
2607
2608 return kp->s;
2609 }
2610
2611 return NULL;
2612 }
2613
2614 void
2615 cresize(int width, int height)
2616 {
2617 int col, row;
2618
2619 if (width != 0)
2620 win.w = width;
2621 if (height != 0)
2622 win.h = height;
2623
2624 col = (win.w - 2 * borderpx) / win.cw;
2625 row = (win.h - 2 * borderpx) / win.ch;
2626
2627 tresize(col, row);
2628 xresize(col, row);
2629 }
2630
2631 void
2632 usage(void)
2633 {
2634 die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
2635 " [-n name] [-o file]\n"
2636 " [-T title] [-t title] [-w windowid]"
2637 " [[-e] command [args ...]]\n"
2638 " %s [-aiv] [-c class] [-f font] [-g geometry]"
2639 " [-n name] [-o file]\n"
2640 " [-T title] [-t title] [-w windowid] -l line"
2641 " [stty_args ...]\n", argv0, argv0);
2642 }