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stj/st.c

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This file contains ambiguous Unicode characters!

This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.

/* See LICENSE for license details. */
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <locale.h>
#include <pwd.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <stdint.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <libgen.h>
#include <fontconfig/fontconfig.h>
#include <wchar.h>
/* X11 */
#include <X11/cursorfont.h>
#include <X11/Xft/Xft.h>
char *argv0;
#define Glyph Glyph_
#define Font Font_
#include "win.h"
#include "st.h"
#if defined(__linux)
#include <pty.h>
#elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
#include <util.h>
#elif defined(__FreeBSD__) || defined(__DragonFly__)
#include <libutil.h>
#endif
/* Arbitrary sizes */
#define UTF_INVALID 0xFFFD
#define ESC_BUF_SIZ (128*UTF_SIZ)
#define ESC_ARG_SIZ 16
#define STR_BUF_SIZ ESC_BUF_SIZ
#define STR_ARG_SIZ ESC_ARG_SIZ
/* macros */
#define NUMMAXLEN(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
#define DEFAULT(a, b) (a) = (a) ? (a) : (b)
#define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
#define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
#define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
#define ISDELIM(u) (utf8strchr(worddelimiters, u) != NULL)
/* constants */
#define ISO14755CMD "dmenu -w %lu -p codepoint: </dev/null"
enum cursor_movement {
CURSOR_SAVE,
CURSOR_LOAD
};
enum cursor_state {
CURSOR_DEFAULT = 0,
CURSOR_WRAPNEXT = 1,
CURSOR_ORIGIN = 2
};
enum charset {
CS_GRAPHIC0,
CS_GRAPHIC1,
CS_UK,
CS_USA,
CS_MULTI,
CS_GER,
CS_FIN
};
enum escape_state {
ESC_START = 1,
ESC_CSI = 2,
ESC_STR = 4, /* OSC, PM, APC */
ESC_ALTCHARSET = 8,
ESC_STR_END = 16, /* a final string was encountered */
ESC_TEST = 32, /* Enter in test mode */
ESC_UTF8 = 64,
ESC_DCS =128,
};
/* CSI Escape sequence structs */
/* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
typedef struct {
char buf[ESC_BUF_SIZ]; /* raw string */
int len; /* raw string length */
char priv;
int arg[ESC_ARG_SIZ];
int narg; /* nb of args */
char mode[2];
} CSIEscape;
/* STR Escape sequence structs */
/* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
typedef struct {
char type; /* ESC type ... */
char buf[STR_BUF_SIZ]; /* raw string */
int len; /* raw string length */
char *args[STR_ARG_SIZ];
int narg; /* nb of args */
} STREscape;
typedef struct {
KeySym k;
uint mask;
char *s;
/* three valued logic variables: 0 indifferent, 1 on, -1 off */
signed char appkey; /* application keypad */
signed char appcursor; /* application cursor */
signed char crlf; /* crlf mode */
} Key;
/* function definitions used in config.h */
static void clipcopy(const Arg *);
static void clippaste(const Arg *);
static void numlock(const Arg *);
static void selpaste(const Arg *);
static void zoom(const Arg *);
static void zoomabs(const Arg *);
static void zoomreset(const Arg *);
static void printsel(const Arg *);
static void printscreen(const Arg *) ;
static void iso14755(const Arg *);
static void toggleprinter(const Arg *);
static void sendbreak(const Arg *);
/* config.h for applying patches and the configuration. */
#include "config.h"
static void execsh(void);
static void stty(void);
static void sigchld(int);
static void csidump(void);
static void csihandle(void);
static void csiparse(void);
static void csireset(void);
static int eschandle(uchar);
static void strdump(void);
static void strhandle(void);
static void strparse(void);
static void strreset(void);
static void tprinter(char *, size_t);
static void tdumpsel(void);
static void tdumpline(int);
static void tdump(void);
static void tclearregion(int, int, int, int);
static void tcursor(int);
static void tdeletechar(int);
static void tdeleteline(int);
static void tinsertblank(int);
static void tinsertblankline(int);
static int tlinelen(int);
static void tmoveto(int, int);
static void tmoveato(int, int);
static void tnewline(int);
static void tputtab(int);
static void tputc(Rune);
static void treset(void);
static void tresize(int, int);
static void tscrollup(int, int);
static void tscrolldown(int, int);
static void tsetattr(int *, int);
static void tsetchar(Rune, Glyph *, int, int);
static void tsetscroll(int, int);
static void tswapscreen(void);
static void tsetmode(int, int, int *, int);
static void tfulldirt(void);
static void techo(Rune);
static void tcontrolcode(uchar );
static void tdectest(char );
static void tdefutf8(char);
static int32_t tdefcolor(int *, int *, int);
static void tdeftran(char);
static void tstrsequence(uchar);
static void selscroll(int, int);
static void selsnap(int *, int *, int);
static Rune utf8decodebyte(char, size_t *);
static char utf8encodebyte(Rune, size_t);
static char *utf8strchr(char *s, Rune u);
static size_t utf8validate(Rune *, size_t);
static char *base64dec(const char *);
static ssize_t xwrite(int, const char *, size_t);
static void *xrealloc(void *, size_t);
/* Globals */
TermWindow win;
Term term;
Selection sel;
int cmdfd;
pid_t pid;
char **opt_cmd = NULL;
char *opt_class = NULL;
char *opt_embed = NULL;
char *opt_font = NULL;
char *opt_io = NULL;
char *opt_line = NULL;
char *opt_name = NULL;
char *opt_title = NULL;
int oldbutton = 3; /* button event on startup: 3 = release */
static CSIEscape csiescseq;
static STREscape strescseq;
static int iofd = 1;
char *usedfont = NULL;
double usedfontsize = 0;
double defaultfontsize = 0;
static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
static Rune utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
static Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
/* config.h array lengths */
size_t colornamelen = LEN(colorname);
size_t mshortcutslen = LEN(mshortcuts);
size_t shortcutslen = LEN(shortcuts);
size_t selmaskslen = LEN(selmasks);
ssize_t
xwrite(int fd, const char *s, size_t len)
{
size_t aux = len;
ssize_t r;
while (len > 0) {
r = write(fd, s, len);
if (r < 0)
return r;
len -= r;
s += r;
}
return aux;
}
void *
xmalloc(size_t len)
{
void *p = malloc(len);
if (!p)
die("Out of memory\n");
return p;
}
void *
xrealloc(void *p, size_t len)
{
if ((p = realloc(p, len)) == NULL)
die("Out of memory\n");
return p;
}
char *
xstrdup(char *s)
{
if ((s = strdup(s)) == NULL)
die("Out of memory\n");
return s;
}
size_t
utf8decode(char *c, Rune *u, size_t clen)
{
size_t i, j, len, type;
Rune udecoded;
*u = UTF_INVALID;
if (!clen)
return 0;
udecoded = utf8decodebyte(c[0], &len);
if (!BETWEEN(len, 1, UTF_SIZ))
return 1;
for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
if (type != 0)
return j;
}
if (j < len)
return 0;
*u = udecoded;
utf8validate(u, len);
return len;
}
Rune
utf8decodebyte(char c, size_t *i)
{
for (*i = 0; *i < LEN(utfmask); ++(*i))
if (((uchar)c & utfmask[*i]) == utfbyte[*i])
return (uchar)c & ~utfmask[*i];
return 0;
}
size_t
utf8encode(Rune u, char *c)
{
size_t len, i;
len = utf8validate(&u, 0);
if (len > UTF_SIZ)
return 0;
for (i = len - 1; i != 0; --i) {
c[i] = utf8encodebyte(u, 0);
u >>= 6;
}
c[0] = utf8encodebyte(u, len);
return len;
}
char
utf8encodebyte(Rune u, size_t i)
{
return utfbyte[i] | (u & ~utfmask[i]);
}
char *
utf8strchr(char *s, Rune u)
{
Rune r;
size_t i, j, len;
len = strlen(s);
for (i = 0, j = 0; i < len; i += j) {
if (!(j = utf8decode(&s[i], &r, len - i)))
break;
if (r == u)
return &(s[i]);
}
return NULL;
}
size_t
utf8validate(Rune *u, size_t i)
{
if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
*u = UTF_INVALID;
for (i = 1; *u > utfmax[i]; ++i)
;
return i;
}
static const char base64_digits[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 62, 0, 0, 0,
63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 0, 0, 0, -1, 0, 0, 0, 0, 1,
2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21,
22, 23, 24, 25, 0, 0, 0, 0, 0, 0, 26, 27, 28, 29, 30, 31, 32, 33, 34,
35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
char *
base64dec(const char *src)
{
size_t in_len = strlen(src);
char *result, *dst;
if (in_len % 4)
return NULL;
result = dst = xmalloc(in_len / 4 * 3 + 1);
while (*src) {
int a = base64_digits[(unsigned char) *src++];
int b = base64_digits[(unsigned char) *src++];
int c = base64_digits[(unsigned char) *src++];
int d = base64_digits[(unsigned char) *src++];
*dst++ = (a << 2) | ((b & 0x30) >> 4);
if (c == -1)
break;
*dst++ = ((b & 0x0f) << 4) | ((c & 0x3c) >> 2);
if (d == -1)
break;
*dst++ = ((c & 0x03) << 6) | d;
}
*dst = '\0';
return result;
}
void
selinit(void)
{
clock_gettime(CLOCK_MONOTONIC, &sel.tclick1);
clock_gettime(CLOCK_MONOTONIC, &sel.tclick2);
sel.mode = SEL_IDLE;
sel.snap = 0;
sel.ob.x = -1;
sel.primary = NULL;
sel.clipboard = NULL;
}
int
x2col(int x)
{
x -= borderpx;
x /= win.cw;
return LIMIT(x, 0, term.col-1);
}
int
y2row(int y)
{
y -= borderpx;
y /= win.ch;
return LIMIT(y, 0, term.row-1);
}
int
tlinelen(int y)
{
int i = term.col;
if (term.line[y][i - 1].mode & ATTR_WRAP)
return i;
while (i > 0 && term.line[y][i - 1].u == ' ')
--i;
return i;
}
void
selnormalize(void)
{
int i;
if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
} else {
sel.nb.x = MIN(sel.ob.x, sel.oe.x);
sel.ne.x = MAX(sel.ob.x, sel.oe.x);
}
sel.nb.y = MIN(sel.ob.y, sel.oe.y);
sel.ne.y = MAX(sel.ob.y, sel.oe.y);
selsnap(&sel.nb.x, &sel.nb.y, -1);
selsnap(&sel.ne.x, &sel.ne.y, +1);
/* expand selection over line breaks */
if (sel.type == SEL_RECTANGULAR)
return;
i = tlinelen(sel.nb.y);
if (i < sel.nb.x)
sel.nb.x = i;
if (tlinelen(sel.ne.y) <= sel.ne.x)
sel.ne.x = term.col - 1;
}
int
selected(int x, int y)
{
if (sel.mode == SEL_EMPTY)
return 0;
if (sel.type == SEL_RECTANGULAR)
return BETWEEN(y, sel.nb.y, sel.ne.y)
&& BETWEEN(x, sel.nb.x, sel.ne.x);
return BETWEEN(y, sel.nb.y, sel.ne.y)
&& (y != sel.nb.y || x >= sel.nb.x)
&& (y != sel.ne.y || x <= sel.ne.x);
}
void
selsnap(int *x, int *y, int direction)
{
int newx, newy, xt, yt;
int delim, prevdelim;
Glyph *gp, *prevgp;
switch (sel.snap) {
case SNAP_WORD:
/*
* Snap around if the word wraps around at the end or
* beginning of a line.
*/
prevgp = &term.line[*y][*x];
prevdelim = ISDELIM(prevgp->u);
for (;;) {
newx = *x + direction;
newy = *y;
if (!BETWEEN(newx, 0, term.col - 1)) {
newy += direction;
newx = (newx + term.col) % term.col;
if (!BETWEEN(newy, 0, term.row - 1))
break;
if (direction > 0)
yt = *y, xt = *x;
else
yt = newy, xt = newx;
if (!(term.line[yt][xt].mode & ATTR_WRAP))
break;
}
if (newx >= tlinelen(newy))
break;
gp = &term.line[newy][newx];
delim = ISDELIM(gp->u);
if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
|| (delim && gp->u != prevgp->u)))
break;
*x = newx;
*y = newy;
prevgp = gp;
prevdelim = delim;
}
break;
case SNAP_LINE:
/*
* Snap around if the the previous line or the current one
* has set ATTR_WRAP at its end. Then the whole next or
* previous line will be selected.
*/
*x = (direction < 0) ? 0 : term.col - 1;
if (direction < 0) {
for (; *y > 0; *y += direction) {
if (!(term.line[*y-1][term.col-1].mode
& ATTR_WRAP)) {
break;
}
}
} else if (direction > 0) {
for (; *y < term.row-1; *y += direction) {
if (!(term.line[*y][term.col-1].mode
& ATTR_WRAP)) {
break;
}
}
}
break;
}
}
char *
getsel(void)
{
char *str, *ptr;
int y, bufsize, lastx, linelen;
Glyph *gp, *last;
if (sel.ob.x == -1)
return NULL;
bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
ptr = str = xmalloc(bufsize);
/* append every set & selected glyph to the selection */
for (y = sel.nb.y; y <= sel.ne.y; y++) {
if ((linelen = tlinelen(y)) == 0) {
*ptr++ = '\n';
continue;
}
if (sel.type == SEL_RECTANGULAR) {
gp = &term.line[y][sel.nb.x];
lastx = sel.ne.x;
} else {
gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
}
last = &term.line[y][MIN(lastx, linelen-1)];
while (last >= gp && last->u == ' ')
--last;
for ( ; gp <= last; ++gp) {
if (gp->mode & ATTR_WDUMMY)
continue;
ptr += utf8encode(gp->u, ptr);
}
/*
* Copy and pasting of line endings is inconsistent
* in the inconsistent terminal and GUI world.
* The best solution seems like to produce '\n' when
* something is copied from st and convert '\n' to
* '\r', when something to be pasted is received by
* st.
* FIXME: Fix the computer world.
*/
if ((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
*ptr++ = '\n';
}
*ptr = 0;
return str;
}
void
selpaste(const Arg *dummy)
{
xselpaste();
}
void
clipcopy(const Arg *dummy)
{
xclipcopy();
}
void
clippaste(const Arg *dummy)
{
xclippaste();
}
void
selclear(void)
{
if (sel.ob.x == -1)
return;
sel.mode = SEL_IDLE;
sel.ob.x = -1;
tsetdirt(sel.nb.y, sel.ne.y);
}
void
die(const char *errstr, ...)
{
va_list ap;
va_start(ap, errstr);
vfprintf(stderr, errstr, ap);
va_end(ap);
exit(1);
}
void
execsh(void)
{
char **args, *sh, *prog;
const struct passwd *pw;
errno = 0;
if ((pw = getpwuid(getuid())) == NULL) {
if (errno)
die("getpwuid:%s\n", strerror(errno));
else
die("who are you?\n");
}
if ((sh = getenv("SHELL")) == NULL)
sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
if (opt_cmd)
prog = opt_cmd[0];
else if (utmp)
prog = utmp;
else
prog = sh;
args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
unsetenv("COLUMNS");
unsetenv("LINES");
unsetenv("TERMCAP");
setenv("LOGNAME", pw->pw_name, 1);
setenv("USER", pw->pw_name, 1);
setenv("SHELL", sh, 1);
setenv("HOME", pw->pw_dir, 1);
setenv("TERM", termname, 1);
xsetenv();
signal(SIGCHLD, SIG_DFL);
signal(SIGHUP, SIG_DFL);
signal(SIGINT, SIG_DFL);
signal(SIGQUIT, SIG_DFL);
signal(SIGTERM, SIG_DFL);
signal(SIGALRM, SIG_DFL);
execvp(prog, args);
_exit(1);
}
void
sigchld(int a)
{
int stat;
pid_t p;
if ((p = waitpid(pid, &stat, WNOHANG)) < 0)
die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
if (pid != p)
return;
if (!WIFEXITED(stat) || WEXITSTATUS(stat))
die("child finished with error '%d'\n", stat);
exit(0);
}
void
stty(void)
{
char cmd[_POSIX_ARG_MAX], **p, *q, *s;
size_t n, siz;
if ((n = strlen(stty_args)) > sizeof(cmd)-1)
die("incorrect stty parameters\n");
memcpy(cmd, stty_args, n);
q = cmd + n;
siz = sizeof(cmd) - n;
for (p = opt_cmd; p && (s = *p); ++p) {
if ((n = strlen(s)) > siz-1)
die("stty parameter length too long\n");
*q++ = ' ';
memcpy(q, s, n);
q += n;
siz -= n + 1;
}
*q = '\0';
if (system(cmd) != 0)
perror("Couldn't call stty");
}
void
ttynew(void)
{
int m, s;
struct winsize w = {term.row, term.col, 0, 0};
if (opt_io) {
term.mode |= MODE_PRINT;
iofd = (!strcmp(opt_io, "-")) ?
1 : open(opt_io, O_WRONLY | O_CREAT, 0666);
if (iofd < 0) {
fprintf(stderr, "Error opening %s:%s\n",
opt_io, strerror(errno));
}
}
if (opt_line) {
if ((cmdfd = open(opt_line, O_RDWR)) < 0)
die("open line failed: %s\n", strerror(errno));
dup2(cmdfd, 0);
stty();
return;
}
/* seems to work fine on linux, openbsd and freebsd */
if (openpty(&m, &s, NULL, NULL, &w) < 0)
die("openpty failed: %s\n", strerror(errno));
switch (pid = fork()) {
case -1:
die("fork failed\n");
break;
case 0:
close(iofd);
setsid(); /* create a new process group */
dup2(s, 0);
dup2(s, 1);
dup2(s, 2);
if (ioctl(s, TIOCSCTTY, NULL) < 0)
die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
close(s);
close(m);
execsh();
break;
default:
close(s);
cmdfd = m;
signal(SIGCHLD, sigchld);
break;
}
}
size_t
ttyread(void)
{
static char buf[BUFSIZ];
static int buflen = 0;
char *ptr;
int charsize; /* size of utf8 char in bytes */
Rune unicodep;
int ret;
/* append read bytes to unprocessed bytes */
if ((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
die("Couldn't read from shell: %s\n", strerror(errno));
buflen += ret;
ptr = buf;
for (;;) {
if (IS_SET(MODE_UTF8) && !IS_SET(MODE_SIXEL)) {
/* process a complete utf8 char */
charsize = utf8decode(ptr, &unicodep, buflen);
if (charsize == 0)
break;
tputc(unicodep);
ptr += charsize;
buflen -= charsize;
} else {
if (buflen <= 0)
break;
tputc(*ptr++ & 0xFF);
buflen--;
}
}
/* keep any uncomplete utf8 char for the next call */
if (buflen > 0)
memmove(buf, ptr, buflen);
return ret;
}
void
ttywrite(const char *s, size_t n)
{
fd_set wfd, rfd;
ssize_t r;
size_t lim = 256;
/*
* Remember that we are using a pty, which might be a modem line.
* Writing too much will clog the line. That's why we are doing this
* dance.
* FIXME: Migrate the world to Plan 9.
*/
while (n > 0) {
FD_ZERO(&wfd);
FD_ZERO(&rfd);
FD_SET(cmdfd, &wfd);
FD_SET(cmdfd, &rfd);
/* Check if we can write. */
if (pselect(cmdfd+1, &rfd, &wfd, NULL, NULL, NULL) < 0) {
if (errno == EINTR)
continue;
die("select failed: %s\n", strerror(errno));
}
if (FD_ISSET(cmdfd, &wfd)) {
/*
* Only write the bytes written by ttywrite() or the
* default of 256. This seems to be a reasonable value
* for a serial line. Bigger values might clog the I/O.
*/
if ((r = write(cmdfd, s, (n < lim)? n : lim)) < 0)
goto write_error;
if (r < n) {
/*
* We weren't able to write out everything.
* This means the buffer is getting full
* again. Empty it.
*/
if (n < lim)
lim = ttyread();
n -= r;
s += r;
} else {
/* All bytes have been written. */
break;
}
}
if (FD_ISSET(cmdfd, &rfd))
lim = ttyread();
}
return;
write_error:
die("write error on tty: %s\n", strerror(errno));
}
void
ttysend(char *s, size_t n)
{
int len;
char *t, *lim;
Rune u;
ttywrite(s, n);
if (!IS_SET(MODE_ECHO))
return;
lim = &s[n];
for (t = s; t < lim; t += len) {
if (IS_SET(MODE_UTF8) && !IS_SET(MODE_SIXEL)) {
len = utf8decode(t, &u, n);
} else {
u = *t & 0xFF;
len = 1;
}
if (len <= 0)
break;
techo(u);
n -= len;
}
}
void
ttyresize(void)
{
struct winsize w;
w.ws_row = term.row;
w.ws_col = term.col;
w.ws_xpixel = win.tw;
w.ws_ypixel = win.th;
if (ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
}
int
tattrset(int attr)
{
int i, j;
for (i = 0; i < term.row-1; i++) {
for (j = 0; j < term.col-1; j++) {
if (term.line[i][j].mode & attr)
return 1;
}
}
return 0;
}
void
tsetdirt(int top, int bot)
{
int i;
LIMIT(top, 0, term.row-1);
LIMIT(bot, 0, term.row-1);
for (i = top; i <= bot; i++)
term.dirty[i] = 1;
}
void
tsetdirtattr(int attr)
{
int i, j;
for (i = 0; i < term.row-1; i++) {
for (j = 0; j < term.col-1; j++) {
if (term.line[i][j].mode & attr) {
tsetdirt(i, i);
break;
}
}
}
}
void
tfulldirt(void)
{
tsetdirt(0, term.row-1);
}
void
tcursor(int mode)
{
static TCursor c[2];
int alt = IS_SET(MODE_ALTSCREEN);
if (mode == CURSOR_SAVE) {
c[alt] = term.c;
} else if (mode == CURSOR_LOAD) {
term.c = c[alt];
tmoveto(c[alt].x, c[alt].y);
}
}
void
treset(void)
{
uint i;
term.c = (TCursor){{
.mode = ATTR_NULL,
.fg = defaultfg,
.bg = defaultbg
}, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
memset(term.tabs, 0, term.col * sizeof(*term.tabs));
for (i = tabspaces; i < term.col; i += tabspaces)
term.tabs[i] = 1;
term.top = 0;
term.bot = term.row - 1;
term.mode = MODE_WRAP|MODE_UTF8;
memset(term.trantbl, CS_USA, sizeof(term.trantbl));
term.charset = 0;
for (i = 0; i < 2; i++) {
tmoveto(0, 0);
tcursor(CURSOR_SAVE);
tclearregion(0, 0, term.col-1, term.row-1);
tswapscreen();
}
}
void
tnew(int col, int row)
{
term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
tresize(col, row);
term.numlock = 1;
treset();
}
void
tswapscreen(void)
{
Line *tmp = term.line;
term.line = term.alt;
term.alt = tmp;
term.mode ^= MODE_ALTSCREEN;
tfulldirt();
}
void
tscrolldown(int orig, int n)
{
int i;
Line temp;
LIMIT(n, 0, term.bot-orig+1);
tsetdirt(orig, term.bot-n);
tclearregion(0, term.bot-n+1, term.col-1, term.bot);
for (i = term.bot; i >= orig+n; i--) {
temp = term.line[i];
term.line[i] = term.line[i-n];
term.line[i-n] = temp;
}
selscroll(orig, n);
}
void
tscrollup(int orig, int n)
{
int i;
Line temp;
LIMIT(n, 0, term.bot-orig+1);
tclearregion(0, orig, term.col-1, orig+n-1);
tsetdirt(orig+n, term.bot);
for (i = orig; i <= term.bot-n; i++) {
temp = term.line[i];
term.line[i] = term.line[i+n];
term.line[i+n] = temp;
}
selscroll(orig, -n);
}
void
selscroll(int orig, int n)
{
if (sel.ob.x == -1)
return;
if (BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
if ((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
selclear();
return;
}
if (sel.type == SEL_RECTANGULAR) {
if (sel.ob.y < term.top)
sel.ob.y = term.top;
if (sel.oe.y > term.bot)
sel.oe.y = term.bot;
} else {
if (sel.ob.y < term.top) {
sel.ob.y = term.top;
sel.ob.x = 0;
}
if (sel.oe.y > term.bot) {
sel.oe.y = term.bot;
sel.oe.x = term.col;
}
}
selnormalize();
}
}
void
tnewline(int first_col)
{
int y = term.c.y;
if (y == term.bot) {
tscrollup(term.top, 1);
} else {
y++;
}
tmoveto(first_col ? 0 : term.c.x, y);
}
void
csiparse(void)
{
char *p = csiescseq.buf, *np;
long int v;
csiescseq.narg = 0;
if (*p == '?') {
csiescseq.priv = 1;
p++;
}
csiescseq.buf[csiescseq.len] = '\0';
while (p < csiescseq.buf+csiescseq.len) {
np = NULL;
v = strtol(p, &np, 10);
if (np == p)
v = 0;
if (v == LONG_MAX || v == LONG_MIN)
v = -1;
csiescseq.arg[csiescseq.narg++] = v;
p = np;
if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
break;
p++;
}
csiescseq.mode[0] = *p++;
csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
}
/* for absolute user moves, when decom is set */
void
tmoveato(int x, int y)
{
tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
}
void
tmoveto(int x, int y)
{
int miny, maxy;
if (term.c.state & CURSOR_ORIGIN) {
miny = term.top;
maxy = term.bot;
} else {
miny = 0;
maxy = term.row - 1;
}
term.c.state &= ~CURSOR_WRAPNEXT;
term.c.x = LIMIT(x, 0, term.col-1);
term.c.y = LIMIT(y, miny, maxy);
}
void
tsetchar(Rune u, Glyph *attr, int x, int y)
{
static char *vt100_0[62] = { /* 0x41 - 0x7e */
"", "", "", "", "", "", "", /* A - G */
0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
"", "", "", "", "", "", "°", "±", /* ` - g */
"", "", "", "", "", "", "", "", /* h - o */
"", "", "", "", "", "", "", "", /* p - w */
"", "", "", "π", "", "£", "·", /* x - ~ */
};
/*
* The table is proudly stolen from rxvt.
*/
if (term.trantbl[term.charset] == CS_GRAPHIC0 &&
BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
if (term.line[y][x].mode & ATTR_WIDE) {
if (x+1 < term.col) {
term.line[y][x+1].u = ' ';
term.line[y][x+1].mode &= ~ATTR_WDUMMY;
}
} else if (term.line[y][x].mode & ATTR_WDUMMY) {
term.line[y][x-1].u = ' ';
term.line[y][x-1].mode &= ~ATTR_WIDE;
}
term.dirty[y] = 1;
term.line[y][x] = *attr;
term.line[y][x].u = u;
}
void
tclearregion(int x1, int y1, int x2, int y2)
{
int x, y, temp;
Glyph *gp;
if (x1 > x2)
temp = x1, x1 = x2, x2 = temp;
if (y1 > y2)
temp = y1, y1 = y2, y2 = temp;
LIMIT(x1, 0, term.col-1);
LIMIT(x2, 0, term.col-1);
LIMIT(y1, 0, term.row-1);
LIMIT(y2, 0, term.row-1);
for (y = y1; y <= y2; y++) {
term.dirty[y] = 1;
for (x = x1; x <= x2; x++) {
gp = &term.line[y][x];
if (selected(x, y))
selclear();
gp->fg = term.c.attr.fg;
gp->bg = term.c.attr.bg;
gp->mode = 0;
gp->u = ' ';
}
}
}
void
tdeletechar(int n)
{
int dst, src, size;
Glyph *line;
LIMIT(n, 0, term.col - term.c.x);
dst = term.c.x;
src = term.c.x + n;
size = term.col - src;
line = term.line[term.c.y];
memmove(&line[dst], &line[src], size * sizeof(Glyph));
tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
}
void
tinsertblank(int n)
{
int dst, src, size;
Glyph *line;
LIMIT(n, 0, term.col - term.c.x);
dst = term.c.x + n;
src = term.c.x;
size = term.col - dst;
line = term.line[term.c.y];
memmove(&line[dst], &line[src], size * sizeof(Glyph));
tclearregion(src, term.c.y, dst - 1, term.c.y);
}
void
tinsertblankline(int n)
{
if (BETWEEN(term.c.y, term.top, term.bot))
tscrolldown(term.c.y, n);
}
void
tdeleteline(int n)
{
if (BETWEEN(term.c.y, term.top, term.bot))
tscrollup(term.c.y, n);
}
int32_t
tdefcolor(int *attr, int *npar, int l)
{
int32_t idx = -1;
uint r, g, b;
switch (attr[*npar + 1]) {
case 2: /* direct color in RGB space */
if (*npar + 4 >= l) {
fprintf(stderr,
"erresc(38): Incorrect number of parameters (%d)\n",
*npar);
break;
}
r = attr[*npar + 2];
g = attr[*npar + 3];
b = attr[*npar + 4];
*npar += 4;
if (!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
r, g, b);
else
idx = TRUECOLOR(r, g, b);
break;
case 5: /* indexed color */
if (*npar + 2 >= l) {
fprintf(stderr,
"erresc(38): Incorrect number of parameters (%d)\n",
*npar);
break;
}
*npar += 2;
if (!BETWEEN(attr[*npar], 0, 255))
fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
else
idx = attr[*npar];
break;
case 0: /* implemented defined (only foreground) */
case 1: /* transparent */
case 3: /* direct color in CMY space */
case 4: /* direct color in CMYK space */
default:
fprintf(stderr,
"erresc(38): gfx attr %d unknown\n", attr[*npar]);
break;
}
return idx;
}
void
tsetattr(int *attr, int l)
{
int i;
int32_t idx;
for (i = 0; i < l; i++) {
switch (attr[i]) {
case 0:
term.c.attr.mode &= ~(
ATTR_BOLD |
ATTR_FAINT |
ATTR_ITALIC |
ATTR_UNDERLINE |
ATTR_BLINK |
ATTR_REVERSE |
ATTR_INVISIBLE |
ATTR_STRUCK );
term.c.attr.fg = defaultfg;
term.c.attr.bg = defaultbg;
break;
case 1:
term.c.attr.mode |= ATTR_BOLD;
break;
case 2:
term.c.attr.mode |= ATTR_FAINT;
break;
case 3:
term.c.attr.mode |= ATTR_ITALIC;
break;
case 4:
term.c.attr.mode |= ATTR_UNDERLINE;
break;
case 5: /* slow blink */
/* FALLTHROUGH */
case 6: /* rapid blink */
term.c.attr.mode |= ATTR_BLINK;
break;
case 7:
term.c.attr.mode |= ATTR_REVERSE;
break;
case 8:
term.c.attr.mode |= ATTR_INVISIBLE;
break;
case 9:
term.c.attr.mode |= ATTR_STRUCK;
break;
case 22:
term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
break;
case 23:
term.c.attr.mode &= ~ATTR_ITALIC;
break;
case 24:
term.c.attr.mode &= ~ATTR_UNDERLINE;
break;
case 25:
term.c.attr.mode &= ~ATTR_BLINK;
break;
case 27:
term.c.attr.mode &= ~ATTR_REVERSE;
break;
case 28:
term.c.attr.mode &= ~ATTR_INVISIBLE;
break;
case 29:
term.c.attr.mode &= ~ATTR_STRUCK;
break;
case 38:
if ((idx = tdefcolor(attr, &i, l)) >= 0)
term.c.attr.fg = idx;
break;
case 39:
term.c.attr.fg = defaultfg;
break;
case 48:
if ((idx = tdefcolor(attr, &i, l)) >= 0)
term.c.attr.bg = idx;
break;
case 49:
term.c.attr.bg = defaultbg;
break;
default:
if (BETWEEN(attr[i], 30, 37)) {
term.c.attr.fg = attr[i] - 30;
} else if (BETWEEN(attr[i], 40, 47)) {
term.c.attr.bg = attr[i] - 40;
} else if (BETWEEN(attr[i], 90, 97)) {
term.c.attr.fg = attr[i] - 90 + 8;
} else if (BETWEEN(attr[i], 100, 107)) {
term.c.attr.bg = attr[i] - 100 + 8;
} else {
fprintf(stderr,
"erresc(default): gfx attr %d unknown\n",
attr[i]), csidump();
}
break;
}
}
}
void
tsetscroll(int t, int b)
{
int temp;
LIMIT(t, 0, term.row-1);
LIMIT(b, 0, term.row-1);
if (t > b) {
temp = t;
t = b;
b = temp;
}
term.top = t;
term.bot = b;
}
void
tsetmode(int priv, int set, int *args, int narg)
{
int *lim, mode;
int alt;
for (lim = args + narg; args < lim; ++args) {
if (priv) {
switch (*args) {
case 1: /* DECCKM -- Cursor key */
MODBIT(term.mode, set, MODE_APPCURSOR);
break;
case 5: /* DECSCNM -- Reverse video */
mode = term.mode;
MODBIT(term.mode, set, MODE_REVERSE);
if (mode != term.mode)
redraw();
break;
case 6: /* DECOM -- Origin */
MODBIT(term.c.state, set, CURSOR_ORIGIN);
tmoveato(0, 0);
break;
case 7: /* DECAWM -- Auto wrap */
MODBIT(term.mode, set, MODE_WRAP);
break;
case 0: /* Error (IGNORED) */
case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
case 3: /* DECCOLM -- Column (IGNORED) */
case 4: /* DECSCLM -- Scroll (IGNORED) */
case 8: /* DECARM -- Auto repeat (IGNORED) */
case 18: /* DECPFF -- Printer feed (IGNORED) */
case 19: /* DECPEX -- Printer extent (IGNORED) */
case 42: /* DECNRCM -- National characters (IGNORED) */
case 12: /* att610 -- Start blinking cursor (IGNORED) */
break;
case 25: /* DECTCEM -- Text Cursor Enable Mode */
MODBIT(term.mode, !set, MODE_HIDE);
break;
case 9: /* X10 mouse compatibility mode */
xsetpointermotion(0);
MODBIT(term.mode, 0, MODE_MOUSE);
MODBIT(term.mode, set, MODE_MOUSEX10);
break;
case 1000: /* 1000: report button press */
xsetpointermotion(0);
MODBIT(term.mode, 0, MODE_MOUSE);
MODBIT(term.mode, set, MODE_MOUSEBTN);
break;
case 1002: /* 1002: report motion on button press */
xsetpointermotion(0);
MODBIT(term.mode, 0, MODE_MOUSE);
MODBIT(term.mode, set, MODE_MOUSEMOTION);
break;
case 1003: /* 1003: enable all mouse motions */
xsetpointermotion(set);
MODBIT(term.mode, 0, MODE_MOUSE);
MODBIT(term.mode, set, MODE_MOUSEMANY);
break;
case 1004: /* 1004: send focus events to tty */
MODBIT(term.mode, set, MODE_FOCUS);
break;
case 1006: /* 1006: extended reporting mode */
MODBIT(term.mode, set, MODE_MOUSESGR);
break;
case 1034:
MODBIT(term.mode, set, MODE_8BIT);
break;
case 1049: /* swap screen & set/restore cursor as xterm */
if (!allowaltscreen)
break;
tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
/* FALLTHROUGH */
case 47: /* swap screen */
case 1047:
if (!allowaltscreen)
break;
alt = IS_SET(MODE_ALTSCREEN);
if (alt) {
tclearregion(0, 0, term.col-1,
term.row-1);
}
if (set ^ alt) /* set is always 1 or 0 */
tswapscreen();
if (*args != 1049)
break;
/* FALLTHROUGH */
case 1048:
tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
break;
case 2004: /* 2004: bracketed paste mode */
MODBIT(term.mode, set, MODE_BRCKTPASTE);
break;
/* Not implemented mouse modes. See comments there. */
case 1001: /* mouse highlight mode; can hang the
terminal by design when implemented. */
case 1005: /* UTF-8 mouse mode; will confuse
applications not supporting UTF-8
and luit. */
case 1015: /* urxvt mangled mouse mode; incompatible
and can be mistaken for other control
codes. */
default:
fprintf(stderr,
"erresc: unknown private set/reset mode %d\n",
*args);
break;
}
} else {
switch (*args) {
case 0: /* Error (IGNORED) */
break;
case 2: /* KAM -- keyboard action */
MODBIT(term.mode, set, MODE_KBDLOCK);
break;
case 4: /* IRM -- Insertion-replacement */
MODBIT(term.mode, set, MODE_INSERT);
break;
case 12: /* SRM -- Send/Receive */
MODBIT(term.mode, !set, MODE_ECHO);
break;
case 20: /* LNM -- Linefeed/new line */
MODBIT(term.mode, set, MODE_CRLF);
break;
default:
fprintf(stderr,
"erresc: unknown set/reset mode %d\n",
*args);
break;
}
}
}
}
void
csihandle(void)
{
char buf[40];
int len;
switch (csiescseq.mode[0]) {
default:
unknown:
fprintf(stderr, "erresc: unknown csi ");
csidump();
/* die(""); */
break;
case '@': /* ICH -- Insert <n> blank char */
DEFAULT(csiescseq.arg[0], 1);
tinsertblank(csiescseq.arg[0]);
break;
case 'A': /* CUU -- Cursor <n> Up */
DEFAULT(csiescseq.arg[0], 1);
tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
break;
case 'B': /* CUD -- Cursor <n> Down */
case 'e': /* VPR --Cursor <n> Down */
DEFAULT(csiescseq.arg[0], 1);
tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
break;
case 'i': /* MC -- Media Copy */
switch (csiescseq.arg[0]) {
case 0:
tdump();
break;
case 1:
tdumpline(term.c.y);
break;
case 2:
tdumpsel();
break;
case 4:
term.mode &= ~MODE_PRINT;
break;
case 5:
term.mode |= MODE_PRINT;
break;
}
break;
case 'c': /* DA -- Device Attributes */
if (csiescseq.arg[0] == 0)
ttywrite(vtiden, sizeof(vtiden) - 1);
break;
case 'C': /* CUF -- Cursor <n> Forward */
case 'a': /* HPR -- Cursor <n> Forward */
DEFAULT(csiescseq.arg[0], 1);
tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
break;
case 'D': /* CUB -- Cursor <n> Backward */
DEFAULT(csiescseq.arg[0], 1);
tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
break;
case 'E': /* CNL -- Cursor <n> Down and first col */
DEFAULT(csiescseq.arg[0], 1);
tmoveto(0, term.c.y+csiescseq.arg[0]);
break;
case 'F': /* CPL -- Cursor <n> Up and first col */
DEFAULT(csiescseq.arg[0], 1);
tmoveto(0, term.c.y-csiescseq.arg[0]);
break;
case 'g': /* TBC -- Tabulation clear */
switch (csiescseq.arg[0]) {
case 0: /* clear current tab stop */
term.tabs[term.c.x] = 0;
break;
case 3: /* clear all the tabs */
memset(term.tabs, 0, term.col * sizeof(*term.tabs));
break;
default:
goto unknown;
}
break;
case 'G': /* CHA -- Move to <col> */
case '`': /* HPA */
DEFAULT(csiescseq.arg[0], 1);
tmoveto(csiescseq.arg[0]-1, term.c.y);
break;
case 'H': /* CUP -- Move to <row> <col> */
case 'f': /* HVP */
DEFAULT(csiescseq.arg[0], 1);
DEFAULT(csiescseq.arg[1], 1);
tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
break;
case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
DEFAULT(csiescseq.arg[0], 1);
tputtab(csiescseq.arg[0]);
break;
case 'J': /* ED -- Clear screen */
selclear();
switch (csiescseq.arg[0]) {
case 0: /* below */
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
if (term.c.y < term.row-1) {
tclearregion(0, term.c.y+1, term.col-1,
term.row-1);
}
break;
case 1: /* above */
if (term.c.y > 1)
tclearregion(0, 0, term.col-1, term.c.y-1);
tclearregion(0, term.c.y, term.c.x, term.c.y);
break;
case 2: /* all */
tclearregion(0, 0, term.col-1, term.row-1);
break;
default:
goto unknown;
}
break;
case 'K': /* EL -- Clear line */
switch (csiescseq.arg[0]) {
case 0: /* right */
tclearregion(term.c.x, term.c.y, term.col-1,
term.c.y);
break;
case 1: /* left */
tclearregion(0, term.c.y, term.c.x, term.c.y);
break;
case 2: /* all */
tclearregion(0, term.c.y, term.col-1, term.c.y);
break;
}
break;
case 'S': /* SU -- Scroll <n> line up */
DEFAULT(csiescseq.arg[0], 1);
tscrollup(term.top, csiescseq.arg[0]);
break;
case 'T': /* SD -- Scroll <n> line down */
DEFAULT(csiescseq.arg[0], 1);
tscrolldown(term.top, csiescseq.arg[0]);
break;
case 'L': /* IL -- Insert <n> blank lines */
DEFAULT(csiescseq.arg[0], 1);
tinsertblankline(csiescseq.arg[0]);
break;
case 'l': /* RM -- Reset Mode */
tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
break;
case 'M': /* DL -- Delete <n> lines */
DEFAULT(csiescseq.arg[0], 1);
tdeleteline(csiescseq.arg[0]);
break;
case 'X': /* ECH -- Erase <n> char */
DEFAULT(csiescseq.arg[0], 1);
tclearregion(term.c.x, term.c.y,
term.c.x + csiescseq.arg[0] - 1, term.c.y);
break;
case 'P': /* DCH -- Delete <n> char */
DEFAULT(csiescseq.arg[0], 1);
tdeletechar(csiescseq.arg[0]);
break;
case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
DEFAULT(csiescseq.arg[0], 1);
tputtab(-csiescseq.arg[0]);
break;
case 'd': /* VPA -- Move to <row> */
DEFAULT(csiescseq.arg[0], 1);
tmoveato(term.c.x, csiescseq.arg[0]-1);
break;
case 'h': /* SM -- Set terminal mode */
tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
break;
case 'm': /* SGR -- Terminal attribute (color) */
tsetattr(csiescseq.arg, csiescseq.narg);
break;
case 'n': /* DSR Device Status Report (cursor position) */
if (csiescseq.arg[0] == 6) {
len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
term.c.y+1, term.c.x+1);
ttywrite(buf, len);
}
break;
case 'r': /* DECSTBM -- Set Scrolling Region */
if (csiescseq.priv) {
goto unknown;
} else {
DEFAULT(csiescseq.arg[0], 1);
DEFAULT(csiescseq.arg[1], term.row);
tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
tmoveato(0, 0);
}
break;
case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
tcursor(CURSOR_SAVE);
break;
case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
tcursor(CURSOR_LOAD);
break;
case ' ':
switch (csiescseq.mode[1]) {
case 'q': /* DECSCUSR -- Set Cursor Style */
DEFAULT(csiescseq.arg[0], 1);
if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
goto unknown;
}
win.cursor = csiescseq.arg[0];
break;
default:
goto unknown;
}
break;
}
}
void
csidump(void)
{
int i;
uint c;
fprintf(stderr, "ESC[");
for (i = 0; i < csiescseq.len; i++) {
c = csiescseq.buf[i] & 0xff;
if (isprint(c)) {
putc(c, stderr);
} else if (c == '\n') {
fprintf(stderr, "(\\n)");
} else if (c == '\r') {
fprintf(stderr, "(\\r)");
} else if (c == 0x1b) {
fprintf(stderr, "(\\e)");
} else {
fprintf(stderr, "(%02x)", c);
}
}
putc('\n', stderr);
}
void
csireset(void)
{
memset(&csiescseq, 0, sizeof(csiescseq));
}
void
strhandle(void)
{
char *p = NULL;
int j, narg, par;
term.esc &= ~(ESC_STR_END|ESC_STR);
strparse();
par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
switch (strescseq.type) {
case ']': /* OSC -- Operating System Command */
switch (par) {
case 0:
case 1:
case 2:
if (narg > 1)
xsettitle(strescseq.args[1]);
return;
case 52:
if (narg > 2) {
char *dec;
dec = base64dec(strescseq.args[2]);
if (dec) {
xsetsel(dec, CurrentTime);
clipcopy(NULL);
} else {
fprintf(stderr, "erresc: invalid base64\n");
}
}
return;
case 4: /* color set */
if (narg < 3)
break;
p = strescseq.args[2];
/* FALLTHROUGH */
case 104: /* color reset, here p = NULL */
j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
if (xsetcolorname(j, p)) {
fprintf(stderr, "erresc: invalid color %s\n", p);
} else {
/*
* TODO if defaultbg color is changed, borders
* are dirty
*/
redraw();
}
return;
}
break;
case 'k': /* old title set compatibility */
xsettitle(strescseq.args[0]);
return;
case 'P': /* DCS -- Device Control String */
term.mode |= ESC_DCS;
case '_': /* APC -- Application Program Command */
case '^': /* PM -- Privacy Message */
return;
}
fprintf(stderr, "erresc: unknown str ");
strdump();
}
void
strparse(void)
{
int c;
char *p = strescseq.buf;
strescseq.narg = 0;
strescseq.buf[strescseq.len] = '\0';
if (*p == '\0')
return;
while (strescseq.narg < STR_ARG_SIZ) {
strescseq.args[strescseq.narg++] = p;
while ((c = *p) != ';' && c != '\0')
++p;
if (c == '\0')
return;
*p++ = '\0';
}
}
void
strdump(void)
{
int i;
uint c;
fprintf(stderr, "ESC%c", strescseq.type);
for (i = 0; i < strescseq.len; i++) {
c = strescseq.buf[i] & 0xff;
if (c == '\0') {
putc('\n', stderr);
return;
} else if (isprint(c)) {
putc(c, stderr);
} else if (c == '\n') {
fprintf(stderr, "(\\n)");
} else if (c == '\r') {
fprintf(stderr, "(\\r)");
} else if (c == 0x1b) {
fprintf(stderr, "(\\e)");
} else {
fprintf(stderr, "(%02x)", c);
}
}
fprintf(stderr, "ESC\\\n");
}
void
strreset(void)
{
memset(&strescseq, 0, sizeof(strescseq));
}
void
sendbreak(const Arg *arg)
{
if (tcsendbreak(cmdfd, 0))
perror("Error sending break");
}
void
tprinter(char *s, size_t len)
{
if (iofd != -1 && xwrite(iofd, s, len) < 0) {
fprintf(stderr, "Error writing in %s:%s\n",
opt_io, strerror(errno));
close(iofd);
iofd = -1;
}
}
void
iso14755(const Arg *arg)
{
unsigned long id = xwinid();
char cmd[sizeof(ISO14755CMD) + NUMMAXLEN(id)];
FILE *p;
char *us, *e, codepoint[9], uc[UTF_SIZ];
unsigned long utf32;
snprintf(cmd, sizeof(cmd), ISO14755CMD, id);
if (!(p = popen(cmd, "r")))
return;
us = fgets(codepoint, sizeof(codepoint), p);
pclose(p);
if (!us || *us == '\0' || *us == '-' || strlen(us) > 7)
return;
if ((utf32 = strtoul(us, &e, 16)) == ULONG_MAX ||
(*e != '\n' && *e != '\0'))
return;
ttysend(uc, utf8encode(utf32, uc));
}
void
toggleprinter(const Arg *arg)
{
term.mode ^= MODE_PRINT;
}
void
printscreen(const Arg *arg)
{
tdump();
}
void
printsel(const Arg *arg)
{
tdumpsel();
}
void
tdumpsel(void)
{
char *ptr;
if ((ptr = getsel())) {
tprinter(ptr, strlen(ptr));
free(ptr);
}
}
void
tdumpline(int n)
{
char buf[UTF_SIZ];
Glyph *bp, *end;
bp = &term.line[n][0];
end = &bp[MIN(tlinelen(n), term.col) - 1];
if (bp != end || bp->u != ' ') {
for ( ;bp <= end; ++bp)
tprinter(buf, utf8encode(bp->u, buf));
}
tprinter("\n", 1);
}
void
tdump(void)
{
int i;
for (i = 0; i < term.row; ++i)
tdumpline(i);
}
void
tputtab(int n)
{
uint x = term.c.x;
if (n > 0) {
while (x < term.col && n--)
for (++x; x < term.col && !term.tabs[x]; ++x)
/* nothing */ ;
} else if (n < 0) {
while (x > 0 && n++)
for (--x; x > 0 && !term.tabs[x]; --x)
/* nothing */ ;
}
term.c.x = LIMIT(x, 0, term.col-1);
}
void
techo(Rune u)
{
if (ISCONTROL(u)) { /* control code */
if (u & 0x80) {
u &= 0x7f;
tputc('^');
tputc('[');
} else if (u != '\n' && u != '\r' && u != '\t') {
u ^= 0x40;
tputc('^');
}
}
tputc(u);
}
void
tdefutf8(char ascii)
{
if (ascii == 'G')
term.mode |= MODE_UTF8;
else if (ascii == '@')
term.mode &= ~MODE_UTF8;
}
void
tdeftran(char ascii)
{
static char cs[] = "0B";
static int vcs[] = {CS_GRAPHIC0, CS_USA};
char *p;
if ((p = strchr(cs, ascii)) == NULL) {
fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
} else {
term.trantbl[term.icharset] = vcs[p - cs];
}
}
void
tdectest(char c)
{
int x, y;
if (c == '8') { /* DEC screen alignment test. */
for (x = 0; x < term.col; ++x) {
for (y = 0; y < term.row; ++y)
tsetchar('E', &term.c.attr, x, y);
}
}
}
void
tstrsequence(uchar c)
{
strreset();
switch (c) {
case 0x90: /* DCS -- Device Control String */
c = 'P';
term.esc |= ESC_DCS;
break;
case 0x9f: /* APC -- Application Program Command */
c = '_';
break;
case 0x9e: /* PM -- Privacy Message */
c = '^';
break;
case 0x9d: /* OSC -- Operating System Command */
c = ']';
break;
}
strescseq.type = c;
term.esc |= ESC_STR;
}
void
tcontrolcode(uchar ascii)
{
switch (ascii) {
case '\t': /* HT */
tputtab(1);
return;
case '\b': /* BS */
tmoveto(term.c.x-1, term.c.y);
return;
case '\r': /* CR */
tmoveto(0, term.c.y);
return;
case '\f': /* LF */
case '\v': /* VT */
case '\n': /* LF */
/* go to first col if the mode is set */
tnewline(IS_SET(MODE_CRLF));
return;
case '\a': /* BEL */
if (term.esc & ESC_STR_END) {
/* backwards compatibility to xterm */
strhandle();
} else {
if (!(win.state & WIN_FOCUSED))
xseturgency(1);
if (bellvolume)
xbell(bellvolume);
}
break;
case '\033': /* ESC */
csireset();
term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
term.esc |= ESC_START;
return;
case '\016': /* SO (LS1 -- Locking shift 1) */
case '\017': /* SI (LS0 -- Locking shift 0) */
term.charset = 1 - (ascii - '\016');
return;
case '\032': /* SUB */
tsetchar('?', &term.c.attr, term.c.x, term.c.y);
case '\030': /* CAN */
csireset();
break;
case '\005': /* ENQ (IGNORED) */
case '\000': /* NUL (IGNORED) */
case '\021': /* XON (IGNORED) */
case '\023': /* XOFF (IGNORED) */
case 0177: /* DEL (IGNORED) */
return;
case 0x80: /* TODO: PAD */
case 0x81: /* TODO: HOP */
case 0x82: /* TODO: BPH */
case 0x83: /* TODO: NBH */
case 0x84: /* TODO: IND */
break;
case 0x85: /* NEL -- Next line */
tnewline(1); /* always go to first col */
break;
case 0x86: /* TODO: SSA */
case 0x87: /* TODO: ESA */
break;
case 0x88: /* HTS -- Horizontal tab stop */
term.tabs[term.c.x] = 1;
break;
case 0x89: /* TODO: HTJ */
case 0x8a: /* TODO: VTS */
case 0x8b: /* TODO: PLD */
case 0x8c: /* TODO: PLU */
case 0x8d: /* TODO: RI */
case 0x8e: /* TODO: SS2 */
case 0x8f: /* TODO: SS3 */
case 0x91: /* TODO: PU1 */
case 0x92: /* TODO: PU2 */
case 0x93: /* TODO: STS */
case 0x94: /* TODO: CCH */
case 0x95: /* TODO: MW */
case 0x96: /* TODO: SPA */
case 0x97: /* TODO: EPA */
case 0x98: /* TODO: SOS */
case 0x99: /* TODO: SGCI */
break;
case 0x9a: /* DECID -- Identify Terminal */
ttywrite(vtiden, sizeof(vtiden) - 1);
break;
case 0x9b: /* TODO: CSI */
case 0x9c: /* TODO: ST */
break;
case 0x90: /* DCS -- Device Control String */
case 0x9d: /* OSC -- Operating System Command */
case 0x9e: /* PM -- Privacy Message */
case 0x9f: /* APC -- Application Program Command */
tstrsequence(ascii);
return;
}
/* only CAN, SUB, \a and C1 chars interrupt a sequence */
term.esc &= ~(ESC_STR_END|ESC_STR);
}
/*
* returns 1 when the sequence is finished and it hasn't to read
* more characters for this sequence, otherwise 0
*/
int
eschandle(uchar ascii)
{
switch (ascii) {
case '[':
term.esc |= ESC_CSI;
return 0;
case '#':
term.esc |= ESC_TEST;
return 0;
case '%':
term.esc |= ESC_UTF8;
return 0;
case 'P': /* DCS -- Device Control String */
case '_': /* APC -- Application Program Command */
case '^': /* PM -- Privacy Message */
case ']': /* OSC -- Operating System Command */
case 'k': /* old title set compatibility */
tstrsequence(ascii);
return 0;
case 'n': /* LS2 -- Locking shift 2 */
case 'o': /* LS3 -- Locking shift 3 */
term.charset = 2 + (ascii - 'n');
break;
case '(': /* GZD4 -- set primary charset G0 */
case ')': /* G1D4 -- set secondary charset G1 */
case '*': /* G2D4 -- set tertiary charset G2 */
case '+': /* G3D4 -- set quaternary charset G3 */
term.icharset = ascii - '(';
term.esc |= ESC_ALTCHARSET;
return 0;
case 'D': /* IND -- Linefeed */
if (term.c.y == term.bot) {
tscrollup(term.top, 1);
} else {
tmoveto(term.c.x, term.c.y+1);
}
break;
case 'E': /* NEL -- Next line */
tnewline(1); /* always go to first col */
break;
case 'H': /* HTS -- Horizontal tab stop */
term.tabs[term.c.x] = 1;
break;
case 'M': /* RI -- Reverse index */
if (term.c.y == term.top) {
tscrolldown(term.top, 1);
} else {
tmoveto(term.c.x, term.c.y-1);
}
break;
case 'Z': /* DECID -- Identify Terminal */
ttywrite(vtiden, sizeof(vtiden) - 1);
break;
case 'c': /* RIS -- Reset to inital state */
treset();
resettitle();
xloadcols();
break;
case '=': /* DECPAM -- Application keypad */
term.mode |= MODE_APPKEYPAD;
break;
case '>': /* DECPNM -- Normal keypad */
term.mode &= ~MODE_APPKEYPAD;
break;
case '7': /* DECSC -- Save Cursor */
tcursor(CURSOR_SAVE);
break;
case '8': /* DECRC -- Restore Cursor */
tcursor(CURSOR_LOAD);
break;
case '\\': /* ST -- String Terminator */
if (term.esc & ESC_STR_END)
strhandle();
break;
default:
fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
(uchar) ascii, isprint(ascii)? ascii:'.');
break;
}
return 1;
}
void
tputc(Rune u)
{
char c[UTF_SIZ];
int control;
int width, len;
Glyph *gp;
control = ISCONTROL(u);
if (!IS_SET(MODE_UTF8) && !IS_SET(MODE_SIXEL)) {
c[0] = u;
width = len = 1;
} else {
len = utf8encode(u, c);
if (!control && (width = wcwidth(u)) == -1) {
memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
width = 1;
}
}
if (IS_SET(MODE_PRINT))
tprinter(c, len);
/*
* STR sequence must be checked before anything else
* because it uses all following characters until it
* receives a ESC, a SUB, a ST or any other C1 control
* character.
*/
if (term.esc & ESC_STR) {
if (u == '\a' || u == 030 || u == 032 || u == 033 ||
ISCONTROLC1(u)) {
term.esc &= ~(ESC_START|ESC_STR|ESC_DCS);
if (IS_SET(MODE_SIXEL)) {
/* TODO: render sixel */;
term.mode &= ~MODE_SIXEL;
return;
}
term.esc |= ESC_STR_END;
goto check_control_code;
}
if (IS_SET(MODE_SIXEL)) {
/* TODO: implement sixel mode */
return;
}
if (term.esc&ESC_DCS && strescseq.len == 0 && u == 'q')
term.mode |= MODE_SIXEL;
if (strescseq.len+len >= sizeof(strescseq.buf)-1) {
/*
* Here is a bug in terminals. If the user never sends
* some code to stop the str or esc command, then st
* will stop responding. But this is better than
* silently failing with unknown characters. At least
* then users will report back.
*
* In the case users ever get fixed, here is the code:
*/
/*
* term.esc = 0;
* strhandle();
*/
return;
}
memmove(&strescseq.buf[strescseq.len], c, len);
strescseq.len += len;
return;
}
check_control_code:
/*
* Actions of control codes must be performed as soon they arrive
* because they can be embedded inside a control sequence, and
* they must not cause conflicts with sequences.
*/
if (control) {
tcontrolcode(u);
/*
* control codes are not shown ever
*/
return;
} else if (term.esc & ESC_START) {
if (term.esc & ESC_CSI) {
csiescseq.buf[csiescseq.len++] = u;
if (BETWEEN(u, 0x40, 0x7E)
|| csiescseq.len >= \
sizeof(csiescseq.buf)-1) {
term.esc = 0;
csiparse();
csihandle();
}
return;
} else if (term.esc & ESC_UTF8) {
tdefutf8(u);
} else if (term.esc & ESC_ALTCHARSET) {
tdeftran(u);
} else if (term.esc & ESC_TEST) {
tdectest(u);
} else {
if (!eschandle(u))
return;
/* sequence already finished */
}
term.esc = 0;
/*
* All characters which form part of a sequence are not
* printed
*/
return;
}
if (sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
selclear();
gp = &term.line[term.c.y][term.c.x];
if (IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
gp->mode |= ATTR_WRAP;
tnewline(1);
gp = &term.line[term.c.y][term.c.x];
}
if (IS_SET(MODE_INSERT) && term.c.x+width < term.col)
memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
if (term.c.x+width > term.col) {
tnewline(1);
gp = &term.line[term.c.y][term.c.x];
}
tsetchar(u, &term.c.attr, term.c.x, term.c.y);
if (width == 2) {
gp->mode |= ATTR_WIDE;
if (term.c.x+1 < term.col) {
gp[1].u = '\0';
gp[1].mode = ATTR_WDUMMY;
}
}
if (term.c.x+width < term.col) {
tmoveto(term.c.x+width, term.c.y);
} else {
term.c.state |= CURSOR_WRAPNEXT;
}
}
void
tresize(int col, int row)
{
int i;
int minrow = MIN(row, term.row);
int mincol = MIN(col, term.col);
int *bp;
TCursor c;
if (col < 1 || row < 1) {
fprintf(stderr,
"tresize: error resizing to %dx%d\n", col, row);
return;
}
/*
* slide screen to keep cursor where we expect it -
* tscrollup would work here, but we can optimize to
* memmove because we're freeing the earlier lines
*/
for (i = 0; i <= term.c.y - row; i++) {
free(term.line[i]);
free(term.alt[i]);
}
/* ensure that both src and dst are not NULL */
if (i > 0) {
memmove(term.line, term.line + i, row * sizeof(Line));
memmove(term.alt, term.alt + i, row * sizeof(Line));
}
for (i += row; i < term.row; i++) {
free(term.line[i]);
free(term.alt[i]);
}
/* resize to new width */
term.specbuf = xrealloc(term.specbuf, col * sizeof(GlyphFontSpec));
/* resize to new height */
term.line = xrealloc(term.line, row * sizeof(Line));
term.alt = xrealloc(term.alt, row * sizeof(Line));
term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
/* resize each row to new width, zero-pad if needed */
for (i = 0; i < minrow; i++) {
term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
}
/* allocate any new rows */
for (/* i = minrow */; i < row; i++) {
term.line[i] = xmalloc(col * sizeof(Glyph));
term.alt[i] = xmalloc(col * sizeof(Glyph));
}
if (col > term.col) {
bp = term.tabs + term.col;
memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
while (--bp > term.tabs && !*bp)
/* nothing */ ;
for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
*bp = 1;
}
/* update terminal size */
term.col = col;
term.row = row;
/* reset scrolling region */
tsetscroll(0, row-1);
/* make use of the LIMIT in tmoveto */
tmoveto(term.c.x, term.c.y);
/* Clearing both screens (it makes dirty all lines) */
c = term.c;
for (i = 0; i < 2; i++) {
if (mincol < col && 0 < minrow) {
tclearregion(mincol, 0, col - 1, minrow - 1);
}
if (0 < col && minrow < row) {
tclearregion(0, minrow, col - 1, row - 1);
}
tswapscreen();
tcursor(CURSOR_LOAD);
}
term.c = c;
}
void
zoom(const Arg *arg)
{
Arg larg;
larg.f = usedfontsize + arg->f;
zoomabs(&larg);
}
void
zoomabs(const Arg *arg)
{
xunloadfonts();
xloadfonts(usedfont, arg->f);
cresize(0, 0);
ttyresize();
redraw();
xhints();
}
void
zoomreset(const Arg *arg)
{
Arg larg;
if (defaultfontsize > 0) {
larg.f = defaultfontsize;
zoomabs(&larg);
}
}
void
resettitle(void)
{
xsettitle(opt_title ? opt_title : "st");
}
void
redraw(void)
{
tfulldirt();
draw();
}
int
match(uint mask, uint state)
{
return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
}
void
numlock(const Arg *dummy)
{
term.numlock ^= 1;
}
char*
kmap(KeySym k, uint state)
{
Key *kp;
int i;
/* Check for mapped keys out of X11 function keys. */
for (i = 0; i < LEN(mappedkeys); i++) {
if (mappedkeys[i] == k)
break;
}
if (i == LEN(mappedkeys)) {
if ((k & 0xFFFF) < 0xFD00)
return NULL;
}
for (kp = key; kp < key + LEN(key); kp++) {
if (kp->k != k)
continue;
if (!match(kp->mask, state))
continue;
if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
continue;
if (term.numlock && kp->appkey == 2)
continue;
if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
continue;
if (IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
continue;
return kp->s;
}
return NULL;
}
void
cresize(int width, int height)
{
int col, row;
if (width != 0)
win.w = width;
if (height != 0)
win.h = height;
col = (win.w - 2 * borderpx) / win.cw;
row = (win.h - 2 * borderpx) / win.ch;
tresize(col, row);
xresize(col, row);
}
void
usage(void)
{
die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
" [-n name] [-o file]\n"
" [-T title] [-t title] [-w windowid]"
" [[-e] command [args ...]]\n"
" %s [-aiv] [-c class] [-f font] [-g geometry]"
" [-n name] [-o file]\n"
" [-T title] [-t title] [-w windowid] -l line"
" [stty_args ...]\n", argv0, argv0);
}