dotfiles/.config/suckless/st/st.c

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/* See LICENSE for license details. */
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <pwd.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <termios.h>
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#include <time.h>
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#include <unistd.h>
#include <wchar.h>
#include "st.h"
#include "win.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 UTF_SIZ 4
#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
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#define STR_TERM_ST "\033\\"
#define STR_TERM_BEL "\007"
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/* macros */
#define IS_SET(flag) ((term.mode & (flag)) != 0)
#define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == 0x7f)
#define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
#define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
#define ISDELIM(u) (u && wcschr(worddelimiters, u))
enum term_mode {
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MODE_WRAP = 1 << 0,
MODE_INSERT = 1 << 1,
MODE_ALTSCREEN = 1 << 2,
MODE_CRLF = 1 << 3,
MODE_ECHO = 1 << 4,
MODE_PRINT = 1 << 5,
MODE_UTF8 = 1 << 6,
};
enum scroll_mode {
SCROLL_RESIZE = -1,
SCROLL_NOSAVEHIST = 0,
SCROLL_SAVEHIST = 1
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};
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, /* DCS, 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,
};
typedef struct {
int mode;
int type;
int snap;
/*
* Selection variables:
* nb normalized coordinates of the beginning of the selection
* ne normalized coordinates of the end of the selection
* ob original coordinates of the beginning of the selection
* oe original coordinates of the end of the selection
*/
struct {
int x, y;
} nb, ne, ob, oe;
int alt;
} Selection;
/* CSI Escape sequence structs */
/* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
typedef struct {
char buf[ESC_BUF_SIZ]; /* raw string */
size_t 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; /* allocated raw string */
size_t siz; /* allocation size */
size_t len; /* raw string length */
char *args[STR_ARG_SIZ];
int narg; /* nb of args */
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char *term; /* terminator: ST or BEL */
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} STREscape;
static void execsh(char *, char **);
static void stty(char **);
static void sigchld(int);
static void ttywriteraw(const char *, size_t);
static void csidump(void);
static void csihandle(void);
static void csiparse(void);
static void csireset(void);
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static void osc_color_response(int, int, int);
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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 tcursor(int);
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static void tresetcursor(void);
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static void tdeleteline(int);
static void tinsertblank(int);
static void tinsertblankline(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 tscrolldown(int, int);
static void tsetattr(const int *, int);
static void tsetchar(Rune, const Glyph *, int, int);
static void tsetdirt(int, int);
static void tsetscroll(int, int);
static void tswapscreen(void);
static void tsetmode(int, int, const int *, int);
static int twrite(const char *, int, int);
static void tcontrolcode(uchar );
static void tdectest(char );
static void tdefutf8(char);
static int32_t tdefcolor(const int *, int *, int);
static void tdeftran(char);
static void tstrsequence(uchar);
static void selnormalize(void);
static void selsnap(int *, int *, int);
static size_t utf8decode(const char *, Rune *, size_t);
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static inline Rune utf8decodebyte(char, size_t *);
static inline char utf8encodebyte(Rune, size_t);
static inline size_t utf8validate(Rune *, size_t);
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static char *base64dec(const char *);
static char base64dec_getc(const char **);
static ssize_t xwrite(int, const char *, size_t);
/* Globals */
static Selection sel;
static CSIEscape csiescseq;
static STREscape strescseq;
static int iofd = 1;
static int cmdfd;
static pid_t pid;
static const uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
static const uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
static const Rune utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
static const Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
#include "patch/st_include.h"
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;
if (!(p = malloc(len)))
die("malloc: %s\n", strerror(errno));
return p;
}
void *
xrealloc(void *p, size_t len)
{
if ((p = realloc(p, len)) == NULL)
die("realloc: %s\n", strerror(errno));
return p;
}
char *
xstrdup(const char *s)
{
char *p;
if ((p = strdup(s)) == NULL)
die("strdup: %s\n", strerror(errno));
return p;
}
size_t
utf8decode(const char *c, Rune *u, size_t clen)
{
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size_t i, len;
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Rune udecoded;
*u = UTF_INVALID;
if (!clen)
return 0;
udecoded = utf8decodebyte(c[0], &len);
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if (!BETWEEN(len, 2, UTF_SIZ)) {
*u = (len == 1) ? udecoded : UTF_INVALID;
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return 1;
}
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clen = MIN(clen, len);
for (i = 1; i < clen; ++i) {
if ((c[i] & 0xC0) != 0x80)
return i;
udecoded = (udecoded << 6) | (c[i] & 0x3F);
}
if (i < len)
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return 0;
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*u = (!BETWEEN(udecoded, utfmin[len], utfmax[len]) || BETWEEN(udecoded, 0xD800, 0xDFFF))
? UTF_INVALID : udecoded;
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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]);
}
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;
}
char
base64dec_getc(const char **src)
{
while (**src && !isprint((unsigned char)**src))
(*src)++;
return **src ? *((*src)++) : '='; /* emulate padding if string ends */
}
char *
base64dec(const char *src)
{
size_t in_len = strlen(src);
char *result, *dst;
static const char base64_digits[256] = {
[43] = 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
};
if (in_len % 4)
in_len += 4 - (in_len % 4);
result = dst = xmalloc(in_len / 4 * 3 + 1);
while (*src) {
int a = base64_digits[(unsigned char) base64dec_getc(&src)];
int b = base64_digits[(unsigned char) base64dec_getc(&src)];
int c = base64_digits[(unsigned char) base64dec_getc(&src)];
int d = base64_digits[(unsigned char) base64dec_getc(&src)];
/* invalid input. 'a' can be -1, e.g. if src is "\n" (c-str) */
if (a == -1 || b == -1)
break;
*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)
{
sel.mode = SEL_IDLE;
sel.snap = 0;
sel.ob.x = -1;
}
void
selstart(int col, int row, int snap)
{
selclear();
sel.mode = SEL_EMPTY;
sel.type = SEL_REGULAR;
sel.alt = IS_SET(MODE_ALTSCREEN);
sel.snap = snap;
sel.oe.x = sel.ob.x = col;
sel.oe.y = sel.ob.y = row;
selnormalize();
if (sel.snap != 0)
sel.mode = SEL_READY;
tsetdirt(sel.nb.y, sel.ne.y);
}
void
selextend(int col, int row, int type, int done)
{
int oldey, oldex, oldsby, oldsey, oldtype;
if (sel.mode == SEL_IDLE)
return;
if (done && sel.mode == SEL_EMPTY) {
selclear();
return;
}
oldey = sel.oe.y;
oldex = sel.oe.x;
oldsby = sel.nb.y;
oldsey = sel.ne.y;
oldtype = sel.type;
sel.oe.x = col;
sel.oe.y = row;
sel.type = type;
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selnormalize();
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if (oldey != sel.oe.y || oldex != sel.oe.x || oldtype != sel.type || sel.mode == SEL_EMPTY)
tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
sel.mode = done ? SEL_IDLE : SEL_READY;
}
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;
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i = tlinelen(TLINE(sel.nb.y));
if (sel.nb.x > i)
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sel.nb.x = i;
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if (sel.ne.x >= tlinelen(TLINE(sel.ne.y)))
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sel.ne.x = term.col - 1;
}
void
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selclear(void)
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{
if (sel.ob.x == -1)
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return;
selremove();
tsetdirt(sel.nb.y, sel.ne.y);
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}
void
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selremove(void)
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{
sel.mode = SEL_IDLE;
sel.ob.x = -1;
}
void
die(const char *errstr, ...)
{
va_list ap;
va_start(ap, errstr);
vfprintf(stderr, errstr, ap);
va_end(ap);
exit(1);
}
void
execsh(char *cmd, char **args)
{
char *sh, *prog, *arg;
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 : cmd;
if (args) {
prog = args[0];
arg = NULL;
} else if (scroll) {
prog = scroll;
arg = utmp ? utmp : sh;
} else if (utmp) {
prog = utmp;
arg = NULL;
} else {
prog = sh;
arg = NULL;
}
DEFAULT(args, ((char *[]) {prog, arg, 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);
setenv("COLORTERM", "truecolor", 1);
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));
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if (pid != p) {
if (!extpipeactive)
return;
if (p == 0 && wait(&stat) < 0)
die("wait: %s\n", strerror(errno));
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/* reinstall sigchld handler */
signal(SIGCHLD, sigchld);
extpipeactive = 0;
return;
}
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if (WIFEXITED(stat) && WEXITSTATUS(stat))
die("child exited with status %d\n", WEXITSTATUS(stat));
else if (WIFSIGNALED(stat))
die("child terminated due to signal %d\n", WTERMSIG(stat));
_exit(0);
}
void
stty(char **args)
{
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 = args; 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");
}
int
ttynew(const char *line, char *cmd, const char *out, char **args)
{
int m, s;
if (out) {
term.mode |= MODE_PRINT;
iofd = (!strcmp(out, "-")) ?
1 : open(out, O_WRONLY | O_CREAT, 0666);
if (iofd < 0) {
fprintf(stderr, "Error opening %s:%s\n",
out, strerror(errno));
}
}
if (line) {
if ((cmdfd = open(line, O_RDWR)) < 0)
die("open line '%s' failed: %s\n",
line, strerror(errno));
dup2(cmdfd, 0);
stty(args);
return cmdfd;
}
/* seems to work fine on linux, openbsd and freebsd */
if (openpty(&m, &s, NULL, NULL, NULL) < 0)
die("openpty failed: %s\n", strerror(errno));
switch (pid = fork()) {
case -1:
die("fork failed: %s\n", strerror(errno));
break;
case 0:
close(iofd);
close(m);
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));
if (s > 2)
close(s);
#ifdef __OpenBSD__
if (pledge("stdio getpw proc exec", NULL) == -1)
die("pledge\n");
#endif
execsh(cmd, args);
break;
default:
#ifdef __OpenBSD__
if (pledge("stdio rpath tty proc ps exec", NULL) == -1)
die("pledge\n");
#endif
close(s);
cmdfd = m;
signal(SIGCHLD, sigchld);
break;
}
return cmdfd;
}
size_t
ttyread(void)
{
static char buf[BUFSIZ];
static int buflen = 0;
int ret, written;
/* append read bytes to unprocessed bytes */
ret = read(cmdfd, buf+buflen, LEN(buf)-buflen);
switch (ret) {
case 0:
exit(0);
case -1:
die("couldn't read from shell: %s\n", strerror(errno));
default:
buflen += ret;
written = twrite(buf, buflen, 0);
buflen -= written;
/* keep any incomplete UTF-8 byte sequence for the next call */
if (buflen > 0)
memmove(buf, buf + written, buflen);
return ret;
}
}
void
ttywrite(const char *s, size_t n, int may_echo)
{
const char *next;
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kscrolldown(&((Arg){ .i = term.scr }));
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if (may_echo && IS_SET(MODE_ECHO))
twrite(s, n, 1);
if (!IS_SET(MODE_CRLF)) {
ttywriteraw(s, n);
return;
}
/* This is similar to how the kernel handles ONLCR for ttys */
while (n > 0) {
if (*s == '\r') {
next = s + 1;
ttywriteraw("\r\n", 2);
} else {
next = memchr(s, '\r', n);
DEFAULT(next, s + n);
ttywriteraw(s, next - s);
}
n -= next - s;
s = next;
}
}
void
ttywriteraw(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
ttyresize(int tw, int th)
{
struct winsize w;
w.ws_row = term.row;
w.ws_col = term.col;
w.ws_xpixel = tw;
w.ws_ypixel = th;
if (ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
}
void
ttyhangup(void)
{
/* Send SIGHUP to shell */
kill(pid, SIGHUP);
}
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;
}
int
tisaltscr(void)
{
return IS_SET(MODE_ALTSCREEN);
}
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) {
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term.dirty[i] = 1;
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break;
}
}
}
}
void
tfulldirt(void)
{
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for (int i = 0; i < term.row; i++)
term.dirty[i] = 1;
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}
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);
}
}
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void
tresetcursor(void)
{
term.c = (TCursor){ { .mode = ATTR_NULL, .fg = defaultfg, .bg = defaultbg },
.x = 0, .y = 0, .state = CURSOR_DEFAULT };
}
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void
treset(void)
{
uint i;
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int x, y;
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tresetcursor();
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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;
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term.histf = 0;
term.histi = 0;
term.scr = 0;
selremove();
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for (i = 0; i < 2; i++) {
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tcursor(CURSOR_SAVE); /* reset saved cursor */
for (y = 0; y < term.row; y++)
for (x = 0; x < term.col; x++)
tclearglyph(&term.line[y][x], 0);
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tswapscreen();
}
tfulldirt();
}
void
tnewline(int first_col)
{
int y = term.c.y;
if (y == term.bot) {
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tscrollup(term.top, term.bot, 1, SCROLL_SAVEHIST);
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} 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, const Glyph *attr, int x, int y)
{
static const 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;
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term.line[y][x].mode |= ATTR_SET;
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if (isboxdraw(u))
term.line[y][x].mode |= ATTR_BOXDRAW;
}
void
tinsertblankline(int n)
{
if (BETWEEN(term.c.y, term.top, term.bot))
tscrolldown(term.c.y, n);
}
void
tdeleteline(int n)
{
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if (BETWEEN(term.c.y, term.top, term.bot)) {
tscrollup(term.c.y, term.bot, n, SCROLL_NOSAVEHIST);
}
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}
int32_t
tdefcolor(const 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(const 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, const int *args, int narg)
{
int alt;
const int *lim;
for (lim = args + narg; args < lim; ++args) {
if (priv) {
switch (*args) {
case 1: /* DECCKM -- Cursor key */
xsetmode(set, MODE_APPCURSOR);
break;
case 5: /* DECSCNM -- Reverse video */
xsetmode(set, MODE_REVERSE);
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 */
xsetmode(!set, MODE_HIDE);
break;
case 9: /* X10 mouse compatibility mode */
xsetpointermotion(0);
xsetmode(0, MODE_MOUSE);
xsetmode(set, MODE_MOUSEX10);
break;
case 1000: /* 1000: report button press */
xsetpointermotion(0);
xsetmode(0, MODE_MOUSE);
xsetmode(set, MODE_MOUSEBTN);
break;
case 1002: /* 1002: report motion on button press */
xsetpointermotion(0);
xsetmode(0, MODE_MOUSE);
xsetmode(set, MODE_MOUSEMOTION);
break;
case 1003: /* 1003: enable all mouse motions */
xsetpointermotion(set);
xsetmode(0, MODE_MOUSE);
xsetmode(set, MODE_MOUSEMANY);
break;
case 1004: /* 1004: send focus events to tty */
xsetmode(set, MODE_FOCUS);
break;
case 1006: /* 1006: extended reporting mode */
xsetmode(set, MODE_MOUSESGR);
break;
case 1034:
xsetmode(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;
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if (set)
tloadaltscreen(*args != 47, *args == 1049);
else
tloaddefscreen(*args != 47, *args == 1049);
break;
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case 1048:
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if (!allowaltscreen)
break;
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tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
break;
case 2004: /* 2004: bracketed paste mode */
xsetmode(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. */
break;
default:
fprintf(stderr,
"erresc: unknown private set/reset mode %d\n",
*args);
break;
}
} else {
switch (*args) {
case 0: /* Error (IGNORED) */
break;
case 2:
xsetmode(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 buffer[40];
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int n = 0, len;
int x;
int maxcol = term.col;
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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, strlen(vtiden), 0);
break;
case 'b': /* REP -- if last char is printable print it <n> more times */
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LIMIT(csiescseq.arg[0], 1, 65535);
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if (term.lastc)
while (csiescseq.arg[0]-- > 0)
tputc(term.lastc);
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 */
switch (csiescseq.arg[0]) {
case 0: /* below */
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tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
if (term.c.y < term.row-1)
tclearregion(0, term.c.y+1, term.col-1, term.row-1, 1);
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break;
case 1: /* above */
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if (term.c.y >= 1)
tclearregion(0, 0, term.col-1, term.c.y-1, 1);
tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
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break;
case 2: /* screen */
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if (IS_SET(MODE_ALTSCREEN)) {
tclearregion(0, 0, term.col-1, term.row-1, 1);
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break;
}
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/* vte does this:
tscrollup(0, term.row-1, term.row, SCROLL_SAVEHIST); */
/* alacritty does this: */
for (n = term.row-1; n >= 0 && tlinelen(term.line[n]) == 0; n--)
;
if (n >= 0)
tscrollup(0, term.row-1, n+1, SCROLL_SAVEHIST);
tscrollup(0, term.row-1, term.row-n-1, SCROLL_NOSAVEHIST);
break;
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break;
case 3: /* scrollback */
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if (IS_SET(MODE_ALTSCREEN))
break;
kscrolldown(&((Arg){ .i = term.scr }));
term.scr = 0;
term.histi = 0;
term.histf = 0;
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break;
default:
goto unknown;
}
break;
case 'K': /* EL -- Clear line */
switch (csiescseq.arg[0]) {
case 0: /* right */
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tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
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break;
case 1: /* left */
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tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
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break;
case 2: /* all */
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tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
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break;
}
break;
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case 'S': /* SU -- Scroll <n> line up ; XTSMGRAPHICS */
if (csiescseq.priv) {
goto unknown;
}
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DEFAULT(csiescseq.arg[0], 1);
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/* xterm, urxvt, alacritty save this in history */
tscrollup(term.top, term.bot, csiescseq.arg[0], SCROLL_SAVEHIST);
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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 */
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if (csiescseq.arg[0] < 0)
return;
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DEFAULT(csiescseq.arg[0], 1);
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x = MIN(term.c.x + csiescseq.arg[0], term.col) - 1;
tclearregion(term.c.x, term.c.y, x, term.c.y, 1);
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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 */
switch (csiescseq.arg[0]) {
case 5: /* Status Report "OK" `0n` */
ttywrite("\033[0n", sizeof("\033[0n") - 1, 0);
break;
case 6: /* Report Cursor Position (CPR) "<row>;<column>R" */
len = snprintf(buffer, sizeof(buffer), "\033[%i;%iR",
term.c.y+1, term.c.x+1);
ttywrite(buffer, len, 0);
break;
default:
goto unknown;
}
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 */
if (xsetcursor(csiescseq.arg[0]))
goto unknown;
break;
default:
goto unknown;
}
break;
}
}
void
csidump(void)
{
size_t 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
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osc_color_response(int num, int index, int is_osc4)
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{
int n;
char buf[32];
unsigned char r, g, b;
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if (xgetcolor(is_osc4 ? num : index, &r, &g, &b)) {
fprintf(stderr, "erresc: failed to fetch %s color %d\n",
is_osc4 ? "osc4" : "osc",
is_osc4 ? num : index);
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return;
}
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n = snprintf(buf, sizeof buf, "\033]%s%d;rgb:%02x%02x/%02x%02x/%02x%02x%s",
is_osc4 ? "4;" : "", num, r, r, g, g, b, b, strescseq.term);
if (n < 0 || n >= sizeof(buf)) {
fprintf(stderr, "error: %s while printing %s response\n",
n < 0 ? "snprintf failed" : "truncation occurred",
is_osc4 ? "osc4" : "osc");
} else {
ttywrite(buf, n, 1);
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}
}
void
strhandle(void)
{
char *p = NULL, *dec;
int j, narg, par;
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const struct { int idx; char *str; } osc_table[] = {
{ defaultfg, "foreground" },
{ defaultbg, "background" },
{ defaultcs, "cursor" }
};
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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:
if (narg > 1) {
xsettitle(strescseq.args[1]);
xseticontitle(strescseq.args[1]);
}
return;
case 1:
if (narg > 1)
xseticontitle(strescseq.args[1]);
return;
case 2:
if (narg > 1)
xsettitle(strescseq.args[1]);
return;
case 52:
if (narg > 2 && allowwindowops) {
dec = base64dec(strescseq.args[2]);
if (dec) {
xsetsel(dec);
xclipcopy();
} else {
fprintf(stderr, "erresc: invalid base64\n");
}
}
return;
case 8: /* Clear Hyperlinks */
return;
case 10:
case 11:
case 12:
if (narg < 2)
break;
p = strescseq.args[1];
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if ((j = par - 10) < 0 || j >= LEN(osc_table))
break; /* shouldn't be possible */
if (!strcmp(p, "?")) {
osc_color_response(par, osc_table[j].idx, 0);
} else if (xsetcolorname(osc_table[j].idx, p)) {
fprintf(stderr, "erresc: invalid %s color: %s\n",
osc_table[j].str, p);
} else {
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tfulldirt();
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}
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return;
case 4: /* color set */
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if (narg < 3)
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break;
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p = strescseq.args[2];
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/* FALLTHROUGH */
case 104: /* color reset */
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j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
if (p && !strcmp(p, "?")) {
osc_color_response(j, 0, 1);
} else if (xsetcolorname(j, p)) {
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if (par == 104 && narg <= 1) {
xloadcols();
return; /* color reset without parameter */
}
fprintf(stderr, "erresc: invalid color j=%d, p=%s\n",
j, p ? p : "(null)");
} else {
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/*
* TODO if defaultbg color is changed, borders
* are dirty
*/
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tfulldirt();
}
return;
}
break;
case 'k': /* old title set compatibility */
xsettitle(strescseq.args[0]);
return;
case 'P': /* DCS -- Device Control String */
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)
{
size_t 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);
}
}
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fprintf(stderr, (strescseq.term[0] == 0x1b) ? "ESC\\\n" : "BEL\n");
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}
void
strreset(void)
{
strescseq = (STREscape){
.buf = xrealloc(strescseq.buf, STR_BUF_SIZ),
.siz = STR_BUF_SIZ,
};
}
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) {
perror("Error writing to output file");
close(iofd);
iofd = -1;
}
}
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
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
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)
{
switch (c) {
case 0x90: /* DCS -- Device Control String */
c = 'P';
break;
case 0x9f: /* APC -- Application Program Command */
c = '_';
break;
case 0x9e: /* PM -- Privacy Message */
c = '^';
break;
case 0x9d: /* OSC -- Operating System Command */
c = ']';
break;
}
strreset();
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 */
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strescseq.term = STR_TERM_BEL;
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strhandle();
} else {
xbell();
}
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);
/* FALLTHROUGH */
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, strlen(vtiden), 0);
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) {
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tscrollup(term.top, term.bot, 1, SCROLL_SAVEHIST);
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} 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, strlen(vtiden), 0);
break;
case 'c': /* RIS -- Reset to initial state */
treset();
resettitle();
xloadcols();
xsetmode(0, MODE_HIDE);
break;
case '=': /* DECPAM -- Application keypad */
xsetmode(1, MODE_APPKEYPAD);
break;
case '>': /* DECPNM -- Normal keypad */
xsetmode(0, 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 */
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if (term.esc & ESC_STR_END) {
strescseq.term = STR_TERM_ST;
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strhandle();
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}
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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 (u < 127 || !IS_SET(MODE_UTF8))
{
c[0] = u;
width = len = 1;
} else {
len = utf8encode(u, c);
if (!control && (width = wcwidth(u)) == -1)
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);
term.esc |= ESC_STR_END;
goto check_control_code;
}
if (strescseq.len+len >= strescseq.siz) {
/*
* 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();
*/
if (strescseq.siz > (SIZE_MAX - UTF_SIZ) / 2)
return;
strescseq.siz *= 2;
strescseq.buf = xrealloc(strescseq.buf, strescseq.siz);
}
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) {
/* in UTF-8 mode ignore handling C1 control characters */
if (IS_SET(MODE_UTF8) && ISCONTROLC1(u))
return;
tcontrolcode(u);
/*
* control codes are not shown ever
*/
if (!term.esc)
term.lastc = 0;
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;
}
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/* selected() takes relative coordinates */
if (selected(term.c.x + term.scr, term.c.y + term.scr))
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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));
gp->mode &= ~ATTR_WIDE;
}
if (term.c.x+width > term.col) {
if (IS_SET(MODE_WRAP))
tnewline(1);
else
tmoveto(term.col - width, term.c.y);
gp = &term.line[term.c.y][term.c.x];
}
tsetchar(u, &term.c.attr, term.c.x, term.c.y);
term.lastc = u;
if (width == 2) {
gp->mode |= ATTR_WIDE;
if (term.c.x+1 < term.col) {
if (gp[1].mode == ATTR_WIDE && term.c.x+2 < term.col) {
gp[2].u = ' ';
gp[2].mode &= ~ATTR_WDUMMY;
}
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 {
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term.wrapcwidth[IS_SET(MODE_ALTSCREEN)] = width;
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term.c.state |= CURSOR_WRAPNEXT;
}
}
int
twrite(const char *buf, int buflen, int show_ctrl)
{
int charsize;
Rune u;
int n;
for (n = 0; n < buflen; n += charsize) {
if (IS_SET(MODE_UTF8))
{
/* process a complete utf8 char */
charsize = utf8decode(buf + n, &u, buflen - n);
if (charsize == 0)
break;
} else {
u = buf[n] & 0xFF;
charsize = 1;
}
if (show_ctrl && ISCONTROL(u)) {
if (u & 0x80) {
u &= 0x7f;
tputc('^');
tputc('[');
} else if (u != '\n' && u != '\r' && u != '\t') {
u ^= 0x40;
tputc('^');
}
}
tputc(u);
}
return n;
}
void
resettitle(void)
{
xsettitle(NULL);
}
void
drawregion(int x1, int y1, int x2, int y2)
{
int y;
for (y = y1; y < y2; y++) {
if (!term.dirty[y])
continue;
term.dirty[y] = 0;
xdrawline(TLINE(y), x1, y, x2);
}
}
#include "patch/st_include.c"
void
draw(void)
{
int cx = term.c.x, ocx = term.ocx, ocy = term.ocy;
if (!xstartdraw())
return;
/* adjust cursor position */
LIMIT(term.ocx, 0, term.col-1);
LIMIT(term.ocy, 0, term.row-1);
if (term.line[term.ocy][term.ocx].mode & ATTR_WDUMMY)
term.ocx--;
if (term.line[term.c.y][cx].mode & ATTR_WDUMMY)
cx--;
drawregion(0, 0, term.col, term.row);
if (term.scr == 0)
xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
term.ocx, term.ocy, term.line[term.ocy][term.ocx],
term.line[term.ocy], term.col);
term.ocx = cx;
term.ocy = term.c.y;
xfinishdraw();
if (ocx != term.ocx || ocy != term.ocy)
xximspot(term.ocx, term.ocy);
}
void
redraw(void)
{
tfulldirt();
draw();
}