aboutsummaryrefslogtreecommitdiff
path: root/sys/cmd/term/term.c
diff options
context:
space:
mode:
Diffstat (limited to 'sys/cmd/term/term.c')
-rw-r--r--sys/cmd/term/term.c2590
1 files changed, 0 insertions, 2590 deletions
diff --git a/sys/cmd/term/term.c b/sys/cmd/term/term.c
deleted file mode 100644
index 7bac567..0000000
--- a/sys/cmd/term/term.c
+++ /dev/null
@@ -1,2590 +0,0 @@
-/* See LICENSE for license details. */
-#include <u.h>
-#include <libn.h>
-
-#include "term.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 ESC_BUF_SIZ (128*UTFmax)
-#define ESC_ARG_SIZ 16
-#define STR_BUF_SIZ ESC_BUF_SIZ
-#define STR_ARG_SIZ ESC_ARG_SIZ
-
-/* 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
-{
- 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,
- MODE_SIXEL = 1 << 7,
-};
-
-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,
-};
-
-typedef struct {
- Glyph attr; /* current char attributes */
- int x;
- int y;
- char state;
-} TCursor;
-
-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;
-
-/* Internal representation of the screen */
-typedef struct {
- int row; /* nb row */
- int col; /* nb col */
- Line *line; /* screen */
- Line *alt; /* alternate screen */
- int *dirty; /* dirtyness of lines */
- TCursor c; /* cursor */
- int ocx; /* old cursor col */
- int ocy; /* old cursor row */
- int top; /* top scroll limit */
- int bot; /* bottom scroll limit */
- int mode; /* terminal mode flags */
- int esc; /* escape state flags */
- char trantbl[4]; /* charset table translation */
- int charset; /* current charset */
- int icharset; /* selected charset for sequence */
- int *tabs;
- rune lastc; /* last printed char outside of sequence, 0 if control */
-} Term;
-
-/* 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 */
-} 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);
-static int eschandle(ubyte);
-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 tscrollup(int, int);
-static void tscrolldown(int, int);
-static void tsetattr(int *, int);
-static void tsetchar(rune, Glyph *, int, int);
-static void tsetdirt(int, int);
-static void tsetscroll(int, int);
-static void tswapscreen(void);
-static void tsetmode(int, int, int *, int);
-static int twrite(const char *, int, int);
-static void tfulldirt(void);
-static void tcontrolcode(ubyte);
-static void tdectest(char );
-static void tdefutf8(char);
-static int32_t tdefcolor(int *, int *, int);
-static void tdeftran(char);
-static void tstrsequence(ubyte);
-
-static void drawregion(int, int, int, int);
-
-static void selnormalize(void);
-static void selscroll(int, int);
-static void selsnap(int *, int *, int);
-
-static size_t utf8decode(const char *, rune *, size_t);
-static rune utf8decodebyte(char, size_t *);
-static char utf8encodebyte(rune, size_t);
-static size_t utf8validate(rune *, size_t);
-
-static char *base64dec(const char *);
-static char base64dec_getc(const char **);
-
-static ssize_t xwrite(int, const char *, size_t);
-
-/* Globals */
-static Term term;
-static Selection sel;
-static CSIEscape csiescseq;
-static STREscape strescseq;
-static int iofd = 1;
-static int cmdfd;
-static pid_t pid;
-
-static ubyte utfbyte[UTFmax + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
-static ubyte utfmask[UTFmax + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
-static rune utfmin[UTFmax + 1] = { 0, 0, 0x80, 0x800, 0x10000};
-static rune utfmax[UTFmax + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
-
-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)))
- panicf("malloc failure");
-
- return p;
-}
-
-void *
-xrealloc(void *p, size_t len)
-{
- if ((p = realloc(p, len)) == nil)
- panicf("realloc failure");
-
- return p;
-}
-
-char *
-xstrdup(char *s)
-{
- if ((s = strdup(s)) == nil)
- panicf("strdup failure");
-
- return s;
-}
-
-size_t
-utf8decode(const char *c, rune *u, size_t clen)
-{
- size_t i, j, len, type;
- rune udecoded;
-
- *u = RuneErr;
- if (!clen)
- return 0;
- udecoded = utf8decodebyte(c[0], &len);
- if (!BETWEEN(len, 1, UTFmax))
- 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 < arrlen(utfmask); ++(*i))
- if (((ubyte)c & utfmask[*i]) == utfbyte[*i])
- return (ubyte)c & ~utfmask[*i];
-
- return 0;
-}
-
-size_t
-utf8encode(rune u, char *c)
-{
- size_t len, i;
-
- len = utf8validate(&u, 0);
- if (len > UTFmax)
- 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 = RuneErr;
- 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_getc(const char **src)
-{
- while (**src && !isprint(**src))
- (*src)++;
- return **src ? *((*src)++) : '='; /* emulate padding if string ends */
-}
-
-char *
-base64dec(const char *src)
-{
- size_t in_len = strlen(src);
- char *result, *dst;
-
- 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;
-}
-
-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
-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;
- selnormalize();
- sel.type = type;
-
- 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;
- 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 || sel.ob.x == -1 ||
- sel.alt != IS_SET(MODE_ALTSCREEN))
- 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 nil;
-
- bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTFmax;
- 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) || sel.type == SEL_RECTANGULAR))
- *ptr++ = '\n';
- }
- *ptr = 0;
- return str;
-}
-
-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
-execsh(char *cmd, char **args)
-{
- char *sh, *prog, *arg;
- const struct passwd *pw;
-
- errno = 0;
- if ((pw = getpwuid(getuid())) == nil) {
- if (errno)
- panicf("getpwuid");
- else
- panicf("who are you");
- }
-
- if ((sh = getenv("SHELL")) == nil)
- sh = (pw->pw_shell[0]) ? pw->pw_shell : cmd;
-
- if (args) {
- prog = args[0];
- arg = nil;
- } else if (scroll) {
- prog = scroll;
- arg = utmp ? utmp : sh;
- } else if (utmp) {
- prog = utmp;
- arg = nil;
- } else {
- prog = sh;
- arg = nil;
- }
- DEFAULT(args, ((char *[]) {prog, arg, nil}));
-
- 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);
-
- 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)
- panicf("waiting for pid %hd failed", pid);
-
- if (pid != p)
- return;
-
- if (WIFEXITED(stat) && WEXITSTATUS(stat))
- panicf("child exited with status %d", WEXITSTATUS(stat));
- else if (WIFSIGNALED(stat))
- panicf("child terminated due to signal %d", 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)
- panicf("incorrect stty parameters");
- 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)
- panicf("stty parameter length too long");
- *q++ = ' ';
- memcpy(q, s, n);
- q += n;
- siz -= n + 1;
- }
- *q = '\0';
- if (system(cmd) != 0)
- perror("Couldn't call stty");
-}
-
-int
-ttynew(char *line, char *cmd, 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)
- panicf("open line '%s' failed", line);
- dup2(cmdfd, 0);
- stty(args);
- return cmdfd;
- }
-
- /* seems to work fine on linux, openbsd and freebsd */
- if (openpty(&m, &s, nil, nil, nil) < 0)
- panicf("openpty failed");
-
- switch (pid = fork()) {
- case -1:
- panicf("fork failed");
- break;
- case 0:
- close(iofd);
- setsid(); /* create a new process group */
- dup2(s, 0);
- dup2(s, 1);
- dup2(s, 2);
- if (ioctl(s, TIOCSCTTY, nil) < 0)
- panicf("ioctl TIOCSCTTY failed");
- close(s);
- close(m);
-#ifdef __OpenBSD__
- if (pledge("stdio getpw proc exec", nil) == -1)
- die("pledge\n");
-#endif
- execsh(cmd, args);
- break;
- default:
-#ifdef __OpenBSD__
- if (pledge("stdio rpath tty proc", nil) == -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, arrlen(buf)-buflen);
-
- switch (ret) {
- case 0:
- exit(0);
- case -1:
- panicf("couldn't read from shell");
- 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;
-
- 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, nil, nil, nil) < 0) {
- if (errno == EINTR)
- continue;
- panicf("select failed");
- }
- 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:
- panicf("write error on tty");
-}
-
-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()
-{
- /* 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;
-}
-
-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);
- 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.nb.y, orig, term.bot) != BETWEEN(sel.ne.y, orig, term.bot)) {
- selclear();
- } else if (BETWEEN(sel.nb.y, orig, term.bot)) {
- sel.ob.y += n;
- sel.oe.y += n;
- if (sel.ob.y < term.top || sel.ob.y > term.bot ||
- sel.oe.y < term.top || sel.oe.y > term.bot) {
- selclear();
- } else {
- 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 = nil;
- 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, UTFmax);
-
- 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 alt, *lim;
-
- for (lim = args + narg; args < lim; ++args) {
- if (priv) {
- switch (*args) {
- case 1: /* DECCKM -- Cursor key */
- wsetmode(set, MODE_APPCURSOR);
- break;
- case 5: /* DECSCNM -- Reverse video */
- wsetmode(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 */
- wsetmode(!set, MODE_HIDE);
- break;
- case 9: /* X10 mouse compatibility mode */
- wsetpointermotion(0);
- wsetmode(0, MODE_MOUSE);
- wsetmode(set, MODE_MOUSEX10);
- break;
- case 1000: /* 1000: report button press */
- wsetpointermotion(0);
- wsetmode(0, MODE_MOUSE);
- wsetmode(set, MODE_MOUSEBTN);
- break;
- case 1002: /* 1002: report motion on button press */
- wsetpointermotion(0);
- wsetmode(0, MODE_MOUSE);
- wsetmode(set, MODE_MOUSEMOTION);
- break;
- case 1003: /* 1003: enable all mouse motions */
- wsetpointermotion(set);
- wsetmode(0, MODE_MOUSE);
- wsetmode(set, MODE_MOUSEMANY);
- break;
- case 1004: /* 1004: send focus events to tty */
- wsetmode(set, MODE_FOCUS);
- break;
- case 1006: /* 1006: extended reporting mode */
- wsetmode(set, MODE_MOUSESGR);
- break;
- case 1034:
- wsetmode(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 */
- wsetmode(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:
- wsetmode(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, strlen(vtiden), 0);
- break;
- case 'b': /* REP -- if last char is printable print it <n> more times */
- DEFAULT(csiescseq.arg[0], 1);
- 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 */
- 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, 0);
- }
- 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 (wsetcursor(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
-strhandle(void)
-{
- char *p = nil, *dec;
- 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)
- wsettitle(strescseq.args[1]);
- return;
- case 52:
- if (narg > 2 && allowwindowops) {
- dec = base64dec(strescseq.args[2]);
- if (dec) {
- wsetsel(dec);
- wclipcopy();
- } 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 = nil */
- j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
- if (wsetcolorname(j, p)) {
- if (par == 104 && narg <= 1)
- return; /* color reset without parameter */
- fprintf(stderr, "erresc: invalid color j=%d, p=%s\n",
- j, p ? p : "(null)");
- } else {
- /*
- * TODO if defaultbg color is changed, borders
- * are dirty
- */
- redraw();
- }
- return;
- }
- break;
- case 'k': /* old title set compatibility */
- wsettitle(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)
-{
- 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);
- }
- }
- fprintf(stderr, "ESC\\\n");
-}
-
-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
-tdumpline(int n)
-{
- char buf[UTFmax];
- 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
-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)) == nil) {
- 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(ubyte 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(ubyte 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 {
- wbell();
- }
- 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(ubyte 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, strlen(vtiden), 0);
- break;
- case 'c': /* RIS -- Reset to initial state */
- treset();
- resettitle();
- wloadcols();
- break;
- case '=': /* DECPAM -- Application keypad */
- wsetmode(1, MODE_APPKEYPAD);
- break;
- case '>': /* DECPNM -- Normal keypad */
- wsetmode(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 */
- if (term.esc & ESC_STR_END)
- strhandle();
- break;
- default:
- fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
- (ubyte) ascii, isprint(ascii)? ascii:'.');
- break;
- }
- return 1;
-}
-
-void
-tputc(rune u)
-{
- char c[UTFmax];
- int control;
- int width, len;
- Glyph *gp;
-
- control = ISCONTROL(u);
- if (u < 127 || !IS_SET(MODE_UTF8 | MODE_SIXEL)) {
- 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|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 >= 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 - UTFmax) / 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) {
- 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;
- }
- if (selected(term.c.x, term.c.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);
- term.lastc = u;
-
- 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;
- }
-}
-
-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) && !IS_SET(MODE_SIXEL)) {
- /* 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
-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 nil */
- 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 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
-resettitle(void)
-{
- wsettitle(nil);
-}
-
-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;
- wdrawline(term.line[y], x1, y, x2);
- }
-}
-
-void
-draw(void)
-{
- int cx = term.c.x, ocx = term.ocx, ocy = term.ocy;
-
- if (!wstartdraw())
- 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);
- wdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
- term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
- term.ocx = cx;
- term.ocy = term.c.y;
- wfinishdraw();
- if (ocx != term.ocx || ocy != term.ocy)
- wximspot(term.ocx, term.ocy);
-}
-
-void
-redraw(void)
-{
- tfulldirt();
- draw();
-}
generated by cgit v1.2.1 (git 2.18.0) at 2024-07-02 10:07:31 +0000