1 /* See LICENSE for license details. */
12 #include <sys/ioctl.h>
13 #include <sys/select.h>
14 #include <sys/types.h>
25 #elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
27 #elif defined(__FreeBSD__) || defined(__DragonFly__)
32 #define UTF_INVALID 0xFFFD
34 #define ESC_BUF_SIZ (128*UTF_SIZ)
35 #define ESC_ARG_SIZ 16
36 #define STR_BUF_SIZ ESC_BUF_SIZ
37 #define STR_ARG_SIZ ESC_ARG_SIZ
40 #define IS_SET(flag) ((term.mode & (flag)) != 0)
41 #define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == 0x7f)
42 #define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
43 #define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
44 #define ISDELIM(u) (u && wcschr(worddelimiters, u))
49 MODE_ALTSCREEN = 1 << 2,
56 enum cursor_movement {
80 ESC_STR = 4, /* DCS, OSC, PM, APC */
82 ESC_STR_END = 16, /* a final string was encountered */
83 ESC_TEST = 32, /* Enter in test mode */
88 Glyph attr; /* current char attributes */
99 * Selection variables:
100 * nb – normalized coordinates of the beginning of the selection
101 * ne – normalized coordinates of the end of the selection
102 * ob – original coordinates of the beginning of the selection
103 * oe – original coordinates of the end of the selection
112 /* Internal representation of the screen */
114 int row; /* nb row */
115 int col; /* nb col */
116 Line *line; /* screen */
117 Line *alt; /* alternate screen */
118 int *dirty; /* dirtyness of lines */
119 TCursor c; /* cursor */
120 int ocx; /* old cursor col */
121 int ocy; /* old cursor row */
122 int top; /* top scroll limit */
123 int bot; /* bottom scroll limit */
124 int mode; /* terminal mode flags */
125 int esc; /* escape state flags */
126 char trantbl[4]; /* charset table translation */
127 int charset; /* current charset */
128 int icharset; /* selected charset for sequence */
130 Rune lastc; /* last printed char outside of sequence, 0 if control */
133 /* CSI Escape sequence structs */
134 /* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
136 char buf[ESC_BUF_SIZ]; /* raw string */
137 size_t len; /* raw string length */
139 int arg[ESC_ARG_SIZ];
140 int narg; /* nb of args */
144 /* STR Escape sequence structs */
145 /* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
147 char type; /* ESC type ... */
148 char *buf; /* allocated raw string */
149 size_t siz; /* allocation size */
150 size_t len; /* raw string length */
151 char *args[STR_ARG_SIZ];
152 int narg; /* nb of args */
155 static void execsh(char *, char **);
156 static void stty(char **);
157 static void sigchld(int);
158 static void ttywriteraw(const char *, size_t);
160 static void csidump(void);
161 static void csihandle(void);
162 static void csiparse(void);
163 static void csireset(void);
164 static void osc_color_response(int, int, int);
165 static int eschandle(uchar);
166 static void strdump(void);
167 static void strhandle(void);
168 static void strparse(void);
169 static void strreset(void);
171 static void tprinter(char *, size_t);
172 static void tdumpsel(void);
173 static void tdumpline(int);
174 static void tdump(void);
175 static void tclearregion(int, int, int, int);
176 static void tcursor(int);
177 static void tdeletechar(int);
178 static void tdeleteline(int);
179 static void tinsertblank(int);
180 static void tinsertblankline(int);
181 static int tlinelen(int);
182 static void tmoveto(int, int);
183 static void tmoveato(int, int);
184 static void tnewline(int);
185 static void tputtab(int);
186 static void tputc(Rune);
187 static void treset(void);
188 static void tscrollup(int, int);
189 static void tscrolldown(int, int);
190 static void tsetattr(const int *, int);
191 static void tsetchar(Rune, const Glyph *, int, int);
192 static void tsetdirt(int, int);
193 static void tsetscroll(int, int);
194 static void tswapscreen(void);
195 static void tsetmode(int, int, const int *, int);
196 static int twrite(const char *, int, int);
197 static void tfulldirt(void);
198 static void tcontrolcode(uchar );
199 static void tdectest(char );
200 static void tdefutf8(char);
201 static int32_t tdefcolor(const int *, int *, int);
202 static void tdeftran(char);
203 static void tstrsequence(uchar);
205 static void drawregion(int, int, int, int);
207 static void selnormalize(void);
208 static void selscroll(int, int);
209 static void selsnap(int *, int *, int);
211 static size_t utf8decode(const char *, Rune *, size_t);
212 static Rune utf8decodebyte(char, size_t *);
213 static char utf8encodebyte(Rune, size_t);
214 static size_t utf8validate(Rune *, size_t);
216 static char *base64dec(const char *);
217 static char base64dec_getc(const char **);
219 static ssize_t xwrite(int, const char *, size_t);
223 static Selection sel;
224 static CSIEscape csiescseq;
225 static STREscape strescseq;
230 static const uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
231 static const uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
232 static const Rune utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
233 static const Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
236 xwrite(int fd, const char *s, size_t len)
242 r = write(fd, s, len);
257 if (!(p = malloc(len)))
258 die("malloc: %s\n", strerror(errno));
264 xrealloc(void *p, size_t len)
266 if ((p = realloc(p, len)) == NULL)
267 die("realloc: %s\n", strerror(errno));
273 xstrdup(const char *s)
277 if ((p = strdup(s)) == NULL)
278 die("strdup: %s\n", strerror(errno));
284 utf8decode(const char *c, Rune *u, size_t clen)
286 size_t i, j, len, type;
292 udecoded = utf8decodebyte(c[0], &len);
293 if (!BETWEEN(len, 1, UTF_SIZ))
295 for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
296 udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
303 utf8validate(u, len);
309 utf8decodebyte(char c, size_t *i)
311 for (*i = 0; *i < LEN(utfmask); ++(*i))
312 if (((uchar)c & utfmask[*i]) == utfbyte[*i])
313 return (uchar)c & ~utfmask[*i];
319 utf8encode(Rune u, char *c)
323 len = utf8validate(&u, 0);
327 for (i = len - 1; i != 0; --i) {
328 c[i] = utf8encodebyte(u, 0);
331 c[0] = utf8encodebyte(u, len);
337 utf8encodebyte(Rune u, size_t i)
339 return utfbyte[i] | (u & ~utfmask[i]);
343 utf8validate(Rune *u, size_t i)
345 if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
347 for (i = 1; *u > utfmax[i]; ++i)
354 base64dec_getc(const char **src)
356 while (**src && !isprint((unsigned char)**src))
358 return **src ? *((*src)++) : '='; /* emulate padding if string ends */
362 base64dec(const char *src)
364 size_t in_len = strlen(src);
366 static const char base64_digits[256] = {
367 [43] = 62, 0, 0, 0, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,
368 0, 0, 0, -1, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
369 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0, 0, 0,
370 0, 0, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
371 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51
375 in_len += 4 - (in_len % 4);
376 result = dst = xmalloc(in_len / 4 * 3 + 1);
378 int a = base64_digits[(unsigned char) base64dec_getc(&src)];
379 int b = base64_digits[(unsigned char) base64dec_getc(&src)];
380 int c = base64_digits[(unsigned char) base64dec_getc(&src)];
381 int d = base64_digits[(unsigned char) base64dec_getc(&src)];
383 /* invalid input. 'a' can be -1, e.g. if src is "\n" (c-str) */
384 if (a == -1 || b == -1)
387 *dst++ = (a << 2) | ((b & 0x30) >> 4);
390 *dst++ = ((b & 0x0f) << 4) | ((c & 0x3c) >> 2);
393 *dst++ = ((c & 0x03) << 6) | d;
412 if (term.line[y][i - 1].mode & ATTR_WRAP)
415 while (i > 0 && term.line[y][i - 1].u == ' ')
422 selstart(int col, int row, int snap)
425 sel.mode = SEL_EMPTY;
426 sel.type = SEL_REGULAR;
427 sel.alt = IS_SET(MODE_ALTSCREEN);
429 sel.oe.x = sel.ob.x = col;
430 sel.oe.y = sel.ob.y = row;
434 sel.mode = SEL_READY;
435 tsetdirt(sel.nb.y, sel.ne.y);
439 selextend(int col, int row, int type, int done)
441 int oldey, oldex, oldsby, oldsey, oldtype;
443 if (sel.mode == SEL_IDLE)
445 if (done && sel.mode == SEL_EMPTY) {
461 if (oldey != sel.oe.y || oldex != sel.oe.x || oldtype != sel.type || sel.mode == SEL_EMPTY)
462 tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
464 sel.mode = done ? SEL_IDLE : SEL_READY;
472 if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
473 sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
474 sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
476 sel.nb.x = MIN(sel.ob.x, sel.oe.x);
477 sel.ne.x = MAX(sel.ob.x, sel.oe.x);
479 sel.nb.y = MIN(sel.ob.y, sel.oe.y);
480 sel.ne.y = MAX(sel.ob.y, sel.oe.y);
482 selsnap(&sel.nb.x, &sel.nb.y, -1);
483 selsnap(&sel.ne.x, &sel.ne.y, +1);
485 /* expand selection over line breaks */
486 if (sel.type == SEL_RECTANGULAR)
488 i = tlinelen(sel.nb.y);
491 if (tlinelen(sel.ne.y) <= sel.ne.x)
492 sel.ne.x = term.col - 1;
496 selected(int x, int y)
498 if (sel.mode == SEL_EMPTY || sel.ob.x == -1 ||
499 sel.alt != IS_SET(MODE_ALTSCREEN))
502 if (sel.type == SEL_RECTANGULAR)
503 return BETWEEN(y, sel.nb.y, sel.ne.y)
504 && BETWEEN(x, sel.nb.x, sel.ne.x);
506 return BETWEEN(y, sel.nb.y, sel.ne.y)
507 && (y != sel.nb.y || x >= sel.nb.x)
508 && (y != sel.ne.y || x <= sel.ne.x);
512 selsnap(int *x, int *y, int direction)
514 int newx, newy, xt, yt;
515 int delim, prevdelim;
516 const Glyph *gp, *prevgp;
521 * Snap around if the word wraps around at the end or
522 * beginning of a line.
524 prevgp = &term.line[*y][*x];
525 prevdelim = ISDELIM(prevgp->u);
527 newx = *x + direction;
529 if (!BETWEEN(newx, 0, term.col - 1)) {
531 newx = (newx + term.col) % term.col;
532 if (!BETWEEN(newy, 0, term.row - 1))
538 yt = newy, xt = newx;
539 if (!(term.line[yt][xt].mode & ATTR_WRAP))
543 if (newx >= tlinelen(newy))
546 gp = &term.line[newy][newx];
547 delim = ISDELIM(gp->u);
548 if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
549 || (delim && gp->u != prevgp->u)))
560 * Snap around if the the previous line or the current one
561 * has set ATTR_WRAP at its end. Then the whole next or
562 * previous line will be selected.
564 *x = (direction < 0) ? 0 : term.col - 1;
566 for (; *y > 0; *y += direction) {
567 if (!(term.line[*y-1][term.col-1].mode
572 } else if (direction > 0) {
573 for (; *y < term.row-1; *y += direction) {
574 if (!(term.line[*y][term.col-1].mode
588 int y, bufsize, lastx, linelen;
589 const Glyph *gp, *last;
594 bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
595 ptr = str = xmalloc(bufsize);
597 /* append every set & selected glyph to the selection */
598 for (y = sel.nb.y; y <= sel.ne.y; y++) {
599 if ((linelen = tlinelen(y)) == 0) {
604 if (sel.type == SEL_RECTANGULAR) {
605 gp = &term.line[y][sel.nb.x];
608 gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
609 lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
611 last = &term.line[y][MIN(lastx, linelen-1)];
612 while (last >= gp && last->u == ' ')
615 for ( ; gp <= last; ++gp) {
616 if (gp->mode & ATTR_WDUMMY)
619 ptr += utf8encode(gp->u, ptr);
623 * Copy and pasting of line endings is inconsistent
624 * in the inconsistent terminal and GUI world.
625 * The best solution seems like to produce '\n' when
626 * something is copied from st and convert '\n' to
627 * '\r', when something to be pasted is received by
629 * FIXME: Fix the computer world.
631 if ((y < sel.ne.y || lastx >= linelen) &&
632 (!(last->mode & ATTR_WRAP) || sel.type == SEL_RECTANGULAR))
646 tsetdirt(sel.nb.y, sel.ne.y);
650 die(const char *errstr, ...)
654 va_start(ap, errstr);
655 vfprintf(stderr, errstr, ap);
661 execsh(char *cmd, char **args)
663 char *sh, *prog, *arg;
664 const struct passwd *pw;
667 if ((pw = getpwuid(getuid())) == NULL) {
669 die("getpwuid: %s\n", strerror(errno));
671 die("who are you?\n");
674 if ((sh = getenv("SHELL")) == NULL)
675 sh = (pw->pw_shell[0]) ? pw->pw_shell : cmd;
682 arg = utmp ? utmp : sh;
690 DEFAULT(args, ((char *[]) {prog, arg, NULL}));
695 setenv("LOGNAME", pw->pw_name, 1);
696 setenv("USER", pw->pw_name, 1);
697 setenv("SHELL", sh, 1);
698 setenv("HOME", pw->pw_dir, 1);
699 setenv("TERM", termname, 1);
701 signal(SIGCHLD, SIG_DFL);
702 signal(SIGHUP, SIG_DFL);
703 signal(SIGINT, SIG_DFL);
704 signal(SIGQUIT, SIG_DFL);
705 signal(SIGTERM, SIG_DFL);
706 signal(SIGALRM, SIG_DFL);
718 if ((p = waitpid(pid, &stat, WNOHANG)) < 0)
719 die("waiting for pid %hd failed: %s\n", pid, strerror(errno));
724 if (WIFEXITED(stat) && WEXITSTATUS(stat))
725 die("child exited with status %d\n", WEXITSTATUS(stat));
726 else if (WIFSIGNALED(stat))
727 die("child terminated due to signal %d\n", WTERMSIG(stat));
734 char cmd[_POSIX_ARG_MAX], **p, *q, *s;
737 if ((n = strlen(stty_args)) > sizeof(cmd)-1)
738 die("incorrect stty parameters\n");
739 memcpy(cmd, stty_args, n);
741 siz = sizeof(cmd) - n;
742 for (p = args; p && (s = *p); ++p) {
743 if ((n = strlen(s)) > siz-1)
744 die("stty parameter length too long\n");
751 if (system(cmd) != 0)
752 perror("Couldn't call stty");
756 ttynew(const char *line, char *cmd, const char *out, char **args)
761 term.mode |= MODE_PRINT;
762 iofd = (!strcmp(out, "-")) ?
763 1 : open(out, O_WRONLY | O_CREAT, 0666);
765 fprintf(stderr, "Error opening %s:%s\n",
766 out, strerror(errno));
771 if ((cmdfd = open(line, O_RDWR)) < 0)
772 die("open line '%s' failed: %s\n",
773 line, strerror(errno));
779 /* seems to work fine on linux, openbsd and freebsd */
780 if (openpty(&m, &s, NULL, NULL, NULL) < 0)
781 die("openpty failed: %s\n", strerror(errno));
783 switch (pid = fork()) {
785 die("fork failed: %s\n", strerror(errno));
790 setsid(); /* create a new process group */
794 if (ioctl(s, TIOCSCTTY, NULL) < 0)
795 die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
799 if (pledge("stdio getpw proc exec", NULL) == -1)
806 if (pledge("stdio rpath tty proc", NULL) == -1)
811 signal(SIGCHLD, sigchld);
820 static char buf[BUFSIZ];
821 static int buflen = 0;
824 /* append read bytes to unprocessed bytes */
825 ret = read(cmdfd, buf+buflen, LEN(buf)-buflen);
831 die("couldn't read from shell: %s\n", strerror(errno));
834 written = twrite(buf, buflen, 0);
836 /* keep any incomplete UTF-8 byte sequence for the next call */
838 memmove(buf, buf + written, buflen);
844 ttywrite(const char *s, size_t n, int may_echo)
848 if (may_echo && IS_SET(MODE_ECHO))
851 if (!IS_SET(MODE_CRLF)) {
856 /* This is similar to how the kernel handles ONLCR for ttys */
860 ttywriteraw("\r\n", 2);
862 next = memchr(s, '\r', n);
863 DEFAULT(next, s + n);
864 ttywriteraw(s, next - s);
872 ttywriteraw(const char *s, size_t n)
879 * Remember that we are using a pty, which might be a modem line.
880 * Writing too much will clog the line. That's why we are doing this
882 * FIXME: Migrate the world to Plan 9.
890 /* Check if we can write. */
891 if (pselect(cmdfd+1, &rfd, &wfd, NULL, NULL, NULL) < 0) {
894 die("select failed: %s\n", strerror(errno));
896 if (FD_ISSET(cmdfd, &wfd)) {
898 * Only write the bytes written by ttywrite() or the
899 * default of 256. This seems to be a reasonable value
900 * for a serial line. Bigger values might clog the I/O.
902 if ((r = write(cmdfd, s, (n < lim)? n : lim)) < 0)
906 * We weren't able to write out everything.
907 * This means the buffer is getting full
915 /* All bytes have been written. */
919 if (FD_ISSET(cmdfd, &rfd))
925 die("write error on tty: %s\n", strerror(errno));
929 ttyresize(int tw, int th)
937 if (ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
938 fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
944 /* Send SIGHUP to shell */
953 for (i = 0; i < term.row-1; i++) {
954 for (j = 0; j < term.col-1; j++) {
955 if (term.line[i][j].mode & attr)
964 tsetdirt(int top, int bot)
968 LIMIT(top, 0, term.row-1);
969 LIMIT(bot, 0, term.row-1);
971 for (i = top; i <= bot; i++)
976 tsetdirtattr(int attr)
980 for (i = 0; i < term.row-1; i++) {
981 for (j = 0; j < term.col-1; j++) {
982 if (term.line[i][j].mode & attr) {
993 tsetdirt(0, term.row-1);
1000 int alt = IS_SET(MODE_ALTSCREEN);
1002 if (mode == CURSOR_SAVE) {
1004 } else if (mode == CURSOR_LOAD) {
1006 tmoveto(c[alt].x, c[alt].y);
1015 term.c = (TCursor){{
1019 }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
1021 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1022 for (i = tabspaces; i < term.col; i += tabspaces)
1025 term.bot = term.row - 1;
1026 term.mode = MODE_WRAP|MODE_UTF8;
1027 memset(term.trantbl, CS_USA, sizeof(term.trantbl));
1030 for (i = 0; i < 2; i++) {
1032 tcursor(CURSOR_SAVE);
1033 tclearregion(0, 0, term.col-1, term.row-1);
1039 tnew(int col, int row)
1041 term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
1049 Line *tmp = term.line;
1051 term.line = term.alt;
1053 term.mode ^= MODE_ALTSCREEN;
1058 tscrolldown(int orig, int n)
1063 LIMIT(n, 0, term.bot-orig+1);
1065 tsetdirt(orig, term.bot-n);
1066 tclearregion(0, term.bot-n+1, term.col-1, term.bot);
1068 for (i = term.bot; i >= orig+n; i--) {
1069 temp = term.line[i];
1070 term.line[i] = term.line[i-n];
1071 term.line[i-n] = temp;
1078 tscrollup(int orig, int n)
1083 LIMIT(n, 0, term.bot-orig+1);
1085 tclearregion(0, orig, term.col-1, orig+n-1);
1086 tsetdirt(orig+n, term.bot);
1088 for (i = orig; i <= term.bot-n; i++) {
1089 temp = term.line[i];
1090 term.line[i] = term.line[i+n];
1091 term.line[i+n] = temp;
1094 selscroll(orig, -n);
1098 selscroll(int orig, int n)
1103 if (BETWEEN(sel.nb.y, orig, term.bot) != BETWEEN(sel.ne.y, orig, term.bot)) {
1105 } else if (BETWEEN(sel.nb.y, orig, term.bot)) {
1108 if (sel.ob.y < term.top || sel.ob.y > term.bot ||
1109 sel.oe.y < term.top || sel.oe.y > term.bot) {
1118 tnewline(int first_col)
1122 if (y == term.bot) {
1123 tscrollup(term.top, 1);
1127 tmoveto(first_col ? 0 : term.c.x, y);
1133 char *p = csiescseq.buf, *np;
1142 csiescseq.buf[csiescseq.len] = '\0';
1143 while (p < csiescseq.buf+csiescseq.len) {
1145 v = strtol(p, &np, 10);
1148 if (v == LONG_MAX || v == LONG_MIN)
1150 csiescseq.arg[csiescseq.narg++] = v;
1152 if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
1156 csiescseq.mode[0] = *p++;
1157 csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
1160 /* for absolute user moves, when decom is set */
1162 tmoveato(int x, int y)
1164 tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
1168 tmoveto(int x, int y)
1172 if (term.c.state & CURSOR_ORIGIN) {
1177 maxy = term.row - 1;
1179 term.c.state &= ~CURSOR_WRAPNEXT;
1180 term.c.x = LIMIT(x, 0, term.col-1);
1181 term.c.y = LIMIT(y, miny, maxy);
1185 tsetchar(Rune u, const Glyph *attr, int x, int y)
1187 static const char *vt100_0[62] = { /* 0x41 - 0x7e */
1188 "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
1189 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
1190 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
1191 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
1192 "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
1193 "", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
1194 "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
1195 "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
1199 * The table is proudly stolen from rxvt.
1201 if (term.trantbl[term.charset] == CS_GRAPHIC0 &&
1202 BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
1203 utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
1205 if (term.line[y][x].mode & ATTR_WIDE) {
1206 if (x+1 < term.col) {
1207 term.line[y][x+1].u = ' ';
1208 term.line[y][x+1].mode &= ~ATTR_WDUMMY;
1210 } else if (term.line[y][x].mode & ATTR_WDUMMY) {
1211 term.line[y][x-1].u = ' ';
1212 term.line[y][x-1].mode &= ~ATTR_WIDE;
1216 term.line[y][x] = *attr;
1217 term.line[y][x].u = u;
1221 tclearregion(int x1, int y1, int x2, int y2)
1227 temp = x1, x1 = x2, x2 = temp;
1229 temp = y1, y1 = y2, y2 = temp;
1231 LIMIT(x1, 0, term.col-1);
1232 LIMIT(x2, 0, term.col-1);
1233 LIMIT(y1, 0, term.row-1);
1234 LIMIT(y2, 0, term.row-1);
1236 for (y = y1; y <= y2; y++) {
1238 for (x = x1; x <= x2; x++) {
1239 gp = &term.line[y][x];
1242 gp->fg = term.c.attr.fg;
1243 gp->bg = term.c.attr.bg;
1256 LIMIT(n, 0, term.col - term.c.x);
1260 size = term.col - src;
1261 line = term.line[term.c.y];
1263 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1264 tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
1273 LIMIT(n, 0, term.col - term.c.x);
1277 size = term.col - dst;
1278 line = term.line[term.c.y];
1280 memmove(&line[dst], &line[src], size * sizeof(Glyph));
1281 tclearregion(src, term.c.y, dst - 1, term.c.y);
1285 tinsertblankline(int n)
1287 if (BETWEEN(term.c.y, term.top, term.bot))
1288 tscrolldown(term.c.y, n);
1294 if (BETWEEN(term.c.y, term.top, term.bot))
1295 tscrollup(term.c.y, n);
1299 tdefcolor(const int *attr, int *npar, int l)
1304 switch (attr[*npar + 1]) {
1305 case 2: /* direct color in RGB space */
1306 if (*npar + 4 >= l) {
1308 "erresc(38): Incorrect number of parameters (%d)\n",
1312 r = attr[*npar + 2];
1313 g = attr[*npar + 3];
1314 b = attr[*npar + 4];
1316 if (!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
1317 fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
1320 idx = TRUECOLOR(r, g, b);
1322 case 5: /* indexed color */
1323 if (*npar + 2 >= l) {
1325 "erresc(38): Incorrect number of parameters (%d)\n",
1330 if (!BETWEEN(attr[*npar], 0, 255))
1331 fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
1335 case 0: /* implemented defined (only foreground) */
1336 case 1: /* transparent */
1337 case 3: /* direct color in CMY space */
1338 case 4: /* direct color in CMYK space */
1341 "erresc(38): gfx attr %d unknown\n", attr[*npar]);
1349 tsetattr(const int *attr, int l)
1354 for (i = 0; i < l; i++) {
1357 term.c.attr.mode &= ~(
1366 term.c.attr.fg = defaultfg;
1367 term.c.attr.bg = defaultbg;
1370 term.c.attr.mode |= ATTR_BOLD;
1373 term.c.attr.mode |= ATTR_FAINT;
1376 term.c.attr.mode |= ATTR_ITALIC;
1379 term.c.attr.mode |= ATTR_UNDERLINE;
1381 case 5: /* slow blink */
1383 case 6: /* rapid blink */
1384 term.c.attr.mode |= ATTR_BLINK;
1387 term.c.attr.mode |= ATTR_REVERSE;
1390 term.c.attr.mode |= ATTR_INVISIBLE;
1393 term.c.attr.mode |= ATTR_STRUCK;
1396 term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
1399 term.c.attr.mode &= ~ATTR_ITALIC;
1402 term.c.attr.mode &= ~ATTR_UNDERLINE;
1405 term.c.attr.mode &= ~ATTR_BLINK;
1408 term.c.attr.mode &= ~ATTR_REVERSE;
1411 term.c.attr.mode &= ~ATTR_INVISIBLE;
1414 term.c.attr.mode &= ~ATTR_STRUCK;
1417 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1418 term.c.attr.fg = idx;
1421 term.c.attr.fg = defaultfg;
1424 if ((idx = tdefcolor(attr, &i, l)) >= 0)
1425 term.c.attr.bg = idx;
1428 term.c.attr.bg = defaultbg;
1431 if (BETWEEN(attr[i], 30, 37)) {
1432 term.c.attr.fg = attr[i] - 30;
1433 } else if (BETWEEN(attr[i], 40, 47)) {
1434 term.c.attr.bg = attr[i] - 40;
1435 } else if (BETWEEN(attr[i], 90, 97)) {
1436 term.c.attr.fg = attr[i] - 90 + 8;
1437 } else if (BETWEEN(attr[i], 100, 107)) {
1438 term.c.attr.bg = attr[i] - 100 + 8;
1441 "erresc(default): gfx attr %d unknown\n",
1451 tsetscroll(int t, int b)
1455 LIMIT(t, 0, term.row-1);
1456 LIMIT(b, 0, term.row-1);
1467 tsetmode(int priv, int set, const int *args, int narg)
1469 int alt; const int *lim;
1471 for (lim = args + narg; args < lim; ++args) {
1474 case 1: /* DECCKM -- Cursor key */
1475 xsetmode(set, MODE_APPCURSOR);
1477 case 5: /* DECSCNM -- Reverse video */
1478 xsetmode(set, MODE_REVERSE);
1480 case 6: /* DECOM -- Origin */
1481 MODBIT(term.c.state, set, CURSOR_ORIGIN);
1484 case 7: /* DECAWM -- Auto wrap */
1485 MODBIT(term.mode, set, MODE_WRAP);
1487 case 0: /* Error (IGNORED) */
1488 case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
1489 case 3: /* DECCOLM -- Column (IGNORED) */
1490 case 4: /* DECSCLM -- Scroll (IGNORED) */
1491 case 8: /* DECARM -- Auto repeat (IGNORED) */
1492 case 18: /* DECPFF -- Printer feed (IGNORED) */
1493 case 19: /* DECPEX -- Printer extent (IGNORED) */
1494 case 42: /* DECNRCM -- National characters (IGNORED) */
1495 case 12: /* att610 -- Start blinking cursor (IGNORED) */
1497 case 25: /* DECTCEM -- Text Cursor Enable Mode */
1498 xsetmode(!set, MODE_HIDE);
1500 case 9: /* X10 mouse compatibility mode */
1501 xsetpointermotion(0);
1502 xsetmode(0, MODE_MOUSE);
1503 xsetmode(set, MODE_MOUSEX10);
1505 case 1000: /* 1000: report button press */
1506 xsetpointermotion(0);
1507 xsetmode(0, MODE_MOUSE);
1508 xsetmode(set, MODE_MOUSEBTN);
1510 case 1002: /* 1002: report motion on button press */
1511 xsetpointermotion(0);
1512 xsetmode(0, MODE_MOUSE);
1513 xsetmode(set, MODE_MOUSEMOTION);
1515 case 1003: /* 1003: enable all mouse motions */
1516 xsetpointermotion(set);
1517 xsetmode(0, MODE_MOUSE);
1518 xsetmode(set, MODE_MOUSEMANY);
1520 case 1004: /* 1004: send focus events to tty */
1521 xsetmode(set, MODE_FOCUS);
1523 case 1006: /* 1006: extended reporting mode */
1524 xsetmode(set, MODE_MOUSESGR);
1527 xsetmode(set, MODE_8BIT);
1529 case 1049: /* swap screen & set/restore cursor as xterm */
1530 if (!allowaltscreen)
1532 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1534 case 47: /* swap screen */
1536 if (!allowaltscreen)
1538 alt = IS_SET(MODE_ALTSCREEN);
1540 tclearregion(0, 0, term.col-1,
1543 if (set ^ alt) /* set is always 1 or 0 */
1549 tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
1551 case 2004: /* 2004: bracketed paste mode */
1552 xsetmode(set, MODE_BRCKTPASTE);
1554 /* Not implemented mouse modes. See comments there. */
1555 case 1001: /* mouse highlight mode; can hang the
1556 terminal by design when implemented. */
1557 case 1005: /* UTF-8 mouse mode; will confuse
1558 applications not supporting UTF-8
1560 case 1015: /* urxvt mangled mouse mode; incompatible
1561 and can be mistaken for other control
1566 "erresc: unknown private set/reset mode %d\n",
1572 case 0: /* Error (IGNORED) */
1575 xsetmode(set, MODE_KBDLOCK);
1577 case 4: /* IRM -- Insertion-replacement */
1578 MODBIT(term.mode, set, MODE_INSERT);
1580 case 12: /* SRM -- Send/Receive */
1581 MODBIT(term.mode, !set, MODE_ECHO);
1583 case 20: /* LNM -- Linefeed/new line */
1584 MODBIT(term.mode, set, MODE_CRLF);
1588 "erresc: unknown set/reset mode %d\n",
1602 switch (csiescseq.mode[0]) {
1605 fprintf(stderr, "erresc: unknown csi ");
1609 case '@': /* ICH -- Insert <n> blank char */
1610 DEFAULT(csiescseq.arg[0], 1);
1611 tinsertblank(csiescseq.arg[0]);
1613 case 'A': /* CUU -- Cursor <n> Up */
1614 DEFAULT(csiescseq.arg[0], 1);
1615 tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
1617 case 'B': /* CUD -- Cursor <n> Down */
1618 case 'e': /* VPR --Cursor <n> Down */
1619 DEFAULT(csiescseq.arg[0], 1);
1620 tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
1622 case 'i': /* MC -- Media Copy */
1623 switch (csiescseq.arg[0]) {
1628 tdumpline(term.c.y);
1634 term.mode &= ~MODE_PRINT;
1637 term.mode |= MODE_PRINT;
1641 case 'c': /* DA -- Device Attributes */
1642 if (csiescseq.arg[0] == 0)
1643 ttywrite(vtiden, strlen(vtiden), 0);
1645 case 'b': /* REP -- if last char is printable print it <n> more times */
1646 DEFAULT(csiescseq.arg[0], 1);
1648 while (csiescseq.arg[0]-- > 0)
1651 case 'C': /* CUF -- Cursor <n> Forward */
1652 case 'a': /* HPR -- Cursor <n> Forward */
1653 DEFAULT(csiescseq.arg[0], 1);
1654 tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
1656 case 'D': /* CUB -- Cursor <n> Backward */
1657 DEFAULT(csiescseq.arg[0], 1);
1658 tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
1660 case 'E': /* CNL -- Cursor <n> Down and first col */
1661 DEFAULT(csiescseq.arg[0], 1);
1662 tmoveto(0, term.c.y+csiescseq.arg[0]);
1664 case 'F': /* CPL -- Cursor <n> Up and first col */
1665 DEFAULT(csiescseq.arg[0], 1);
1666 tmoveto(0, term.c.y-csiescseq.arg[0]);
1668 case 'g': /* TBC -- Tabulation clear */
1669 switch (csiescseq.arg[0]) {
1670 case 0: /* clear current tab stop */
1671 term.tabs[term.c.x] = 0;
1673 case 3: /* clear all the tabs */
1674 memset(term.tabs, 0, term.col * sizeof(*term.tabs));
1680 case 'G': /* CHA -- Move to <col> */
1682 DEFAULT(csiescseq.arg[0], 1);
1683 tmoveto(csiescseq.arg[0]-1, term.c.y);
1685 case 'H': /* CUP -- Move to <row> <col> */
1687 DEFAULT(csiescseq.arg[0], 1);
1688 DEFAULT(csiescseq.arg[1], 1);
1689 tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
1691 case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
1692 DEFAULT(csiescseq.arg[0], 1);
1693 tputtab(csiescseq.arg[0]);
1695 case 'J': /* ED -- Clear screen */
1696 switch (csiescseq.arg[0]) {
1698 tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
1699 if (term.c.y < term.row-1) {
1700 tclearregion(0, term.c.y+1, term.col-1,
1706 tclearregion(0, 0, term.col-1, term.c.y-1);
1707 tclearregion(0, term.c.y, term.c.x, term.c.y);
1710 tclearregion(0, 0, term.col-1, term.row-1);
1716 case 'K': /* EL -- Clear line */
1717 switch (csiescseq.arg[0]) {
1719 tclearregion(term.c.x, term.c.y, term.col-1,
1723 tclearregion(0, term.c.y, term.c.x, term.c.y);
1726 tclearregion(0, term.c.y, term.col-1, term.c.y);
1730 case 'S': /* SU -- Scroll <n> line up */
1731 DEFAULT(csiescseq.arg[0], 1);
1732 tscrollup(term.top, csiescseq.arg[0]);
1734 case 'T': /* SD -- Scroll <n> line down */
1735 DEFAULT(csiescseq.arg[0], 1);
1736 tscrolldown(term.top, csiescseq.arg[0]);
1738 case 'L': /* IL -- Insert <n> blank lines */
1739 DEFAULT(csiescseq.arg[0], 1);
1740 tinsertblankline(csiescseq.arg[0]);
1742 case 'l': /* RM -- Reset Mode */
1743 tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
1745 case 'M': /* DL -- Delete <n> lines */
1746 DEFAULT(csiescseq.arg[0], 1);
1747 tdeleteline(csiescseq.arg[0]);
1749 case 'X': /* ECH -- Erase <n> char */
1750 DEFAULT(csiescseq.arg[0], 1);
1751 tclearregion(term.c.x, term.c.y,
1752 term.c.x + csiescseq.arg[0] - 1, term.c.y);
1754 case 'P': /* DCH -- Delete <n> char */
1755 DEFAULT(csiescseq.arg[0], 1);
1756 tdeletechar(csiescseq.arg[0]);
1758 case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
1759 DEFAULT(csiescseq.arg[0], 1);
1760 tputtab(-csiescseq.arg[0]);
1762 case 'd': /* VPA -- Move to <row> */
1763 DEFAULT(csiescseq.arg[0], 1);
1764 tmoveato(term.c.x, csiescseq.arg[0]-1);
1766 case 'h': /* SM -- Set terminal mode */
1767 tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
1769 case 'm': /* SGR -- Terminal attribute (color) */
1770 tsetattr(csiescseq.arg, csiescseq.narg);
1772 case 'n': /* DSR – Device Status Report (cursor position) */
1773 if (csiescseq.arg[0] == 6) {
1774 len = snprintf(buf, sizeof(buf), "\033[%i;%iR",
1775 term.c.y+1, term.c.x+1);
1776 ttywrite(buf, len, 0);
1779 case 'r': /* DECSTBM -- Set Scrolling Region */
1780 if (csiescseq.priv) {
1783 DEFAULT(csiescseq.arg[0], 1);
1784 DEFAULT(csiescseq.arg[1], term.row);
1785 tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
1789 case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
1790 tcursor(CURSOR_SAVE);
1792 case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
1793 tcursor(CURSOR_LOAD);
1796 switch (csiescseq.mode[1]) {
1797 case 'q': /* DECSCUSR -- Set Cursor Style */
1798 if (xsetcursor(csiescseq.arg[0]))
1814 fprintf(stderr, "ESC[");
1815 for (i = 0; i < csiescseq.len; i++) {
1816 c = csiescseq.buf[i] & 0xff;
1819 } else if (c == '\n') {
1820 fprintf(stderr, "(\\n)");
1821 } else if (c == '\r') {
1822 fprintf(stderr, "(\\r)");
1823 } else if (c == 0x1b) {
1824 fprintf(stderr, "(\\e)");
1826 fprintf(stderr, "(%02x)", c);
1835 memset(&csiescseq, 0, sizeof(csiescseq));
1839 osc_color_response(int num, int index, int is_osc4)
1843 unsigned char r, g, b;
1845 if (xgetcolor(is_osc4 ? num : index, &r, &g, &b)) {
1846 fprintf(stderr, "erresc: failed to fetch %s color %d\n",
1847 is_osc4 ? "osc4" : "osc",
1848 is_osc4 ? num : index);
1852 n = snprintf(buf, sizeof buf, "\033]%s%d;rgb:%02x%02x/%02x%02x/%02x%02x\007",
1853 is_osc4 ? "4;" : "", num, r, r, g, g, b, b);
1854 if (n < 0 || n >= sizeof(buf)) {
1855 fprintf(stderr, "error: %s while printing %s response\n",
1856 n < 0 ? "snprintf failed" : "truncation occurred",
1857 is_osc4 ? "osc4" : "osc");
1859 ttywrite(buf, n, 1);
1866 char *p = NULL, *dec;
1868 const struct { int idx; char *str; } osc_table[] = {
1869 { defaultfg, "foreground" },
1870 { defaultbg, "background" },
1871 { defaultcs, "cursor" }
1874 term.esc &= ~(ESC_STR_END|ESC_STR);
1876 par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
1878 switch (strescseq.type) {
1879 case ']': /* OSC -- Operating System Command */
1883 xsettitle(strescseq.args[1]);
1884 xseticontitle(strescseq.args[1]);
1889 xseticontitle(strescseq.args[1]);
1893 xsettitle(strescseq.args[1]);
1896 if (narg > 2 && allowwindowops) {
1897 dec = base64dec(strescseq.args[2]);
1902 fprintf(stderr, "erresc: invalid base64\n");
1911 p = strescseq.args[1];
1912 if ((j = par - 10) < 0 || j >= LEN(osc_table))
1913 break; /* shouldn't be possible */
1915 if (!strcmp(p, "?")) {
1916 osc_color_response(par, osc_table[j].idx, 0);
1917 } else if (xsetcolorname(osc_table[j].idx, p)) {
1918 fprintf(stderr, "erresc: invalid %s color: %s\n",
1919 osc_table[j].str, p);
1924 case 4: /* color set */
1927 p = strescseq.args[2];
1929 case 104: /* color reset */
1930 j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
1932 if (p && !strcmp(p, "?")) {
1933 osc_color_response(j, 0, 1);
1934 } else if (xsetcolorname(j, p)) {
1935 if (par == 104 && narg <= 1) {
1937 return; /* color reset without parameter */
1939 fprintf(stderr, "erresc: invalid color j=%d, p=%s\n",
1940 j, p ? p : "(null)");
1943 * TODO if defaultbg color is changed, borders
1951 case 'k': /* old title set compatibility */
1952 xsettitle(strescseq.args[0]);
1954 case 'P': /* DCS -- Device Control String */
1955 case '_': /* APC -- Application Program Command */
1956 case '^': /* PM -- Privacy Message */
1960 fprintf(stderr, "erresc: unknown str ");
1968 char *p = strescseq.buf;
1971 strescseq.buf[strescseq.len] = '\0';
1976 while (strescseq.narg < STR_ARG_SIZ) {
1977 strescseq.args[strescseq.narg++] = p;
1978 while ((c = *p) != ';' && c != '\0')
1992 fprintf(stderr, "ESC%c", strescseq.type);
1993 for (i = 0; i < strescseq.len; i++) {
1994 c = strescseq.buf[i] & 0xff;
1998 } else if (isprint(c)) {
2000 } else if (c == '\n') {
2001 fprintf(stderr, "(\\n)");
2002 } else if (c == '\r') {
2003 fprintf(stderr, "(\\r)");
2004 } else if (c == 0x1b) {
2005 fprintf(stderr, "(\\e)");
2007 fprintf(stderr, "(%02x)", c);
2010 fprintf(stderr, "ESC\\\n");
2016 strescseq = (STREscape){
2017 .buf = xrealloc(strescseq.buf, STR_BUF_SIZ),
2023 sendbreak(const Arg *arg)
2025 if (tcsendbreak(cmdfd, 0))
2026 perror("Error sending break");
2030 tprinter(char *s, size_t len)
2032 if (iofd != -1 && xwrite(iofd, s, len) < 0) {
2033 perror("Error writing to output file");
2040 toggleprinter(const Arg *arg)
2042 term.mode ^= MODE_PRINT;
2046 printscreen(const Arg *arg)
2052 printsel(const Arg *arg)
2062 if ((ptr = getsel())) {
2063 tprinter(ptr, strlen(ptr));
2072 const Glyph *bp, *end;
2074 bp = &term.line[n][0];
2075 end = &bp[MIN(tlinelen(n), term.col) - 1];
2076 if (bp != end || bp->u != ' ') {
2077 for ( ; bp <= end; ++bp)
2078 tprinter(buf, utf8encode(bp->u, buf));
2088 for (i = 0; i < term.row; ++i)
2098 while (x < term.col && n--)
2099 for (++x; x < term.col && !term.tabs[x]; ++x)
2102 while (x > 0 && n++)
2103 for (--x; x > 0 && !term.tabs[x]; --x)
2106 term.c.x = LIMIT(x, 0, term.col-1);
2110 tdefutf8(char ascii)
2113 term.mode |= MODE_UTF8;
2114 else if (ascii == '@')
2115 term.mode &= ~MODE_UTF8;
2119 tdeftran(char ascii)
2121 static char cs[] = "0B";
2122 static int vcs[] = {CS_GRAPHIC0, CS_USA};
2125 if ((p = strchr(cs, ascii)) == NULL) {
2126 fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
2128 term.trantbl[term.icharset] = vcs[p - cs];
2137 if (c == '8') { /* DEC screen alignment test. */
2138 for (x = 0; x < term.col; ++x) {
2139 for (y = 0; y < term.row; ++y)
2140 tsetchar('E', &term.c.attr, x, y);
2146 tstrsequence(uchar c)
2149 case 0x90: /* DCS -- Device Control String */
2152 case 0x9f: /* APC -- Application Program Command */
2155 case 0x9e: /* PM -- Privacy Message */
2158 case 0x9d: /* OSC -- Operating System Command */
2164 term.esc |= ESC_STR;
2168 tcontrolcode(uchar ascii)
2175 tmoveto(term.c.x-1, term.c.y);
2178 tmoveto(0, term.c.y);
2183 /* go to first col if the mode is set */
2184 tnewline(IS_SET(MODE_CRLF));
2186 case '\a': /* BEL */
2187 if (term.esc & ESC_STR_END) {
2188 /* backwards compatibility to xterm */
2194 case '\033': /* ESC */
2196 term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
2197 term.esc |= ESC_START;
2199 case '\016': /* SO (LS1 -- Locking shift 1) */
2200 case '\017': /* SI (LS0 -- Locking shift 0) */
2201 term.charset = 1 - (ascii - '\016');
2203 case '\032': /* SUB */
2204 tsetchar('?', &term.c.attr, term.c.x, term.c.y);
2206 case '\030': /* CAN */
2209 case '\005': /* ENQ (IGNORED) */
2210 case '\000': /* NUL (IGNORED) */
2211 case '\021': /* XON (IGNORED) */
2212 case '\023': /* XOFF (IGNORED) */
2213 case 0177: /* DEL (IGNORED) */
2215 case 0x80: /* TODO: PAD */
2216 case 0x81: /* TODO: HOP */
2217 case 0x82: /* TODO: BPH */
2218 case 0x83: /* TODO: NBH */
2219 case 0x84: /* TODO: IND */
2221 case 0x85: /* NEL -- Next line */
2222 tnewline(1); /* always go to first col */
2224 case 0x86: /* TODO: SSA */
2225 case 0x87: /* TODO: ESA */
2227 case 0x88: /* HTS -- Horizontal tab stop */
2228 term.tabs[term.c.x] = 1;
2230 case 0x89: /* TODO: HTJ */
2231 case 0x8a: /* TODO: VTS */
2232 case 0x8b: /* TODO: PLD */
2233 case 0x8c: /* TODO: PLU */
2234 case 0x8d: /* TODO: RI */
2235 case 0x8e: /* TODO: SS2 */
2236 case 0x8f: /* TODO: SS3 */
2237 case 0x91: /* TODO: PU1 */
2238 case 0x92: /* TODO: PU2 */
2239 case 0x93: /* TODO: STS */
2240 case 0x94: /* TODO: CCH */
2241 case 0x95: /* TODO: MW */
2242 case 0x96: /* TODO: SPA */
2243 case 0x97: /* TODO: EPA */
2244 case 0x98: /* TODO: SOS */
2245 case 0x99: /* TODO: SGCI */
2247 case 0x9a: /* DECID -- Identify Terminal */
2248 ttywrite(vtiden, strlen(vtiden), 0);
2250 case 0x9b: /* TODO: CSI */
2251 case 0x9c: /* TODO: ST */
2253 case 0x90: /* DCS -- Device Control String */
2254 case 0x9d: /* OSC -- Operating System Command */
2255 case 0x9e: /* PM -- Privacy Message */
2256 case 0x9f: /* APC -- Application Program Command */
2257 tstrsequence(ascii);
2260 /* only CAN, SUB, \a and C1 chars interrupt a sequence */
2261 term.esc &= ~(ESC_STR_END|ESC_STR);
2265 * returns 1 when the sequence is finished and it hasn't to read
2266 * more characters for this sequence, otherwise 0
2269 eschandle(uchar ascii)
2273 term.esc |= ESC_CSI;
2276 term.esc |= ESC_TEST;
2279 term.esc |= ESC_UTF8;
2281 case 'P': /* DCS -- Device Control String */
2282 case '_': /* APC -- Application Program Command */
2283 case '^': /* PM -- Privacy Message */
2284 case ']': /* OSC -- Operating System Command */
2285 case 'k': /* old title set compatibility */
2286 tstrsequence(ascii);
2288 case 'n': /* LS2 -- Locking shift 2 */
2289 case 'o': /* LS3 -- Locking shift 3 */
2290 term.charset = 2 + (ascii - 'n');
2292 case '(': /* GZD4 -- set primary charset G0 */
2293 case ')': /* G1D4 -- set secondary charset G1 */
2294 case '*': /* G2D4 -- set tertiary charset G2 */
2295 case '+': /* G3D4 -- set quaternary charset G3 */
2296 term.icharset = ascii - '(';
2297 term.esc |= ESC_ALTCHARSET;
2299 case 'D': /* IND -- Linefeed */
2300 if (term.c.y == term.bot) {
2301 tscrollup(term.top, 1);
2303 tmoveto(term.c.x, term.c.y+1);
2306 case 'E': /* NEL -- Next line */
2307 tnewline(1); /* always go to first col */
2309 case 'H': /* HTS -- Horizontal tab stop */
2310 term.tabs[term.c.x] = 1;
2312 case 'M': /* RI -- Reverse index */
2313 if (term.c.y == term.top) {
2314 tscrolldown(term.top, 1);
2316 tmoveto(term.c.x, term.c.y-1);
2319 case 'Z': /* DECID -- Identify Terminal */
2320 ttywrite(vtiden, strlen(vtiden), 0);
2322 case 'c': /* RIS -- Reset to initial state */
2327 case '=': /* DECPAM -- Application keypad */
2328 xsetmode(1, MODE_APPKEYPAD);
2330 case '>': /* DECPNM -- Normal keypad */
2331 xsetmode(0, MODE_APPKEYPAD);
2333 case '7': /* DECSC -- Save Cursor */
2334 tcursor(CURSOR_SAVE);
2336 case '8': /* DECRC -- Restore Cursor */
2337 tcursor(CURSOR_LOAD);
2339 case '\\': /* ST -- String Terminator */
2340 if (term.esc & ESC_STR_END)
2344 fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
2345 (uchar) ascii, isprint(ascii)? ascii:'.');
2359 control = ISCONTROL(u);
2360 if (u < 127 || !IS_SET(MODE_UTF8)) {
2364 len = utf8encode(u, c);
2365 if (!control && (width = wcwidth(u)) == -1)
2369 if (IS_SET(MODE_PRINT))
2373 * STR sequence must be checked before anything else
2374 * because it uses all following characters until it
2375 * receives a ESC, a SUB, a ST or any other C1 control
2378 if (term.esc & ESC_STR) {
2379 if (u == '\a' || u == 030 || u == 032 || u == 033 ||
2381 term.esc &= ~(ESC_START|ESC_STR);
2382 term.esc |= ESC_STR_END;
2383 goto check_control_code;
2386 if (strescseq.len+len >= strescseq.siz) {
2388 * Here is a bug in terminals. If the user never sends
2389 * some code to stop the str or esc command, then st
2390 * will stop responding. But this is better than
2391 * silently failing with unknown characters. At least
2392 * then users will report back.
2394 * In the case users ever get fixed, here is the code:
2400 if (strescseq.siz > (SIZE_MAX - UTF_SIZ) / 2)
2403 strescseq.buf = xrealloc(strescseq.buf, strescseq.siz);
2406 memmove(&strescseq.buf[strescseq.len], c, len);
2407 strescseq.len += len;
2413 * Actions of control codes must be performed as soon they arrive
2414 * because they can be embedded inside a control sequence, and
2415 * they must not cause conflicts with sequences.
2420 * control codes are not shown ever
2425 } else if (term.esc & ESC_START) {
2426 if (term.esc & ESC_CSI) {
2427 csiescseq.buf[csiescseq.len++] = u;
2428 if (BETWEEN(u, 0x40, 0x7E)
2429 || csiescseq.len >= \
2430 sizeof(csiescseq.buf)-1) {
2436 } else if (term.esc & ESC_UTF8) {
2438 } else if (term.esc & ESC_ALTCHARSET) {
2440 } else if (term.esc & ESC_TEST) {
2445 /* sequence already finished */
2449 * All characters which form part of a sequence are not
2454 if (selected(term.c.x, term.c.y))
2457 gp = &term.line[term.c.y][term.c.x];
2458 if (IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
2459 gp->mode |= ATTR_WRAP;
2461 gp = &term.line[term.c.y][term.c.x];
2464 if (IS_SET(MODE_INSERT) && term.c.x+width < term.col)
2465 memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
2467 if (term.c.x+width > term.col) {
2469 gp = &term.line[term.c.y][term.c.x];
2472 tsetchar(u, &term.c.attr, term.c.x, term.c.y);
2476 gp->mode |= ATTR_WIDE;
2477 if (term.c.x+1 < term.col) {
2478 if (gp[1].mode == ATTR_WIDE && term.c.x+2 < term.col) {
2480 gp[2].mode &= ~ATTR_WDUMMY;
2483 gp[1].mode = ATTR_WDUMMY;
2486 if (term.c.x+width < term.col) {
2487 tmoveto(term.c.x+width, term.c.y);
2489 term.c.state |= CURSOR_WRAPNEXT;
2494 twrite(const char *buf, int buflen, int show_ctrl)
2500 for (n = 0; n < buflen; n += charsize) {
2501 if (IS_SET(MODE_UTF8)) {
2502 /* process a complete utf8 char */
2503 charsize = utf8decode(buf + n, &u, buflen - n);
2510 if (show_ctrl && ISCONTROL(u)) {
2515 } else if (u != '\n' && u != '\r' && u != '\t') {
2526 tresize(int col, int row)
2529 int minrow = MIN(row, term.row);
2530 int mincol = MIN(col, term.col);
2534 if (col < 1 || row < 1) {
2536 "tresize: error resizing to %dx%d\n", col, row);
2541 * slide screen to keep cursor where we expect it -
2542 * tscrollup would work here, but we can optimize to
2543 * memmove because we're freeing the earlier lines
2545 for (i = 0; i <= term.c.y - row; i++) {
2549 /* ensure that both src and dst are not NULL */
2551 memmove(term.line, term.line + i, row * sizeof(Line));
2552 memmove(term.alt, term.alt + i, row * sizeof(Line));
2554 for (i += row; i < term.row; i++) {
2559 /* resize to new height */
2560 term.line = xrealloc(term.line, row * sizeof(Line));
2561 term.alt = xrealloc(term.alt, row * sizeof(Line));
2562 term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
2563 term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
2565 /* resize each row to new width, zero-pad if needed */
2566 for (i = 0; i < minrow; i++) {
2567 term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
2568 term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
2571 /* allocate any new rows */
2572 for (/* i = minrow */; i < row; i++) {
2573 term.line[i] = xmalloc(col * sizeof(Glyph));
2574 term.alt[i] = xmalloc(col * sizeof(Glyph));
2576 if (col > term.col) {
2577 bp = term.tabs + term.col;
2579 memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
2580 while (--bp > term.tabs && !*bp)
2582 for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
2585 /* update terminal size */
2588 /* reset scrolling region */
2589 tsetscroll(0, row-1);
2590 /* make use of the LIMIT in tmoveto */
2591 tmoveto(term.c.x, term.c.y);
2592 /* Clearing both screens (it makes dirty all lines) */
2594 for (i = 0; i < 2; i++) {
2595 if (mincol < col && 0 < minrow) {
2596 tclearregion(mincol, 0, col - 1, minrow - 1);
2598 if (0 < col && minrow < row) {
2599 tclearregion(0, minrow, col - 1, row - 1);
2602 tcursor(CURSOR_LOAD);
2614 drawregion(int x1, int y1, int x2, int y2)
2618 for (y = y1; y < y2; y++) {
2623 xdrawline(term.line[y], x1, y, x2);
2630 int cx = term.c.x, ocx = term.ocx, ocy = term.ocy;
2635 /* adjust cursor position */
2636 LIMIT(term.ocx, 0, term.col-1);
2637 LIMIT(term.ocy, 0, term.row-1);
2638 if (term.line[term.ocy][term.ocx].mode & ATTR_WDUMMY)
2640 if (term.line[term.c.y][cx].mode & ATTR_WDUMMY)
2643 drawregion(0, 0, term.col, term.row);
2644 xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
2645 term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
2647 term.ocy = term.c.y;
2649 if (ocx != term.ocx || ocy != term.ocy)
2650 xximspot(term.ocx, term.ocy);