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636c369d86
stterm/st.c
Aurélien Aptel 636c369d86 added VT100 save&load cursor support.
2010-02-21 14:28:32 +01:00

1236 lines
26 KiB
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/* See LICENSE for licence details. */
#define _XOPEN_SOURCE 600
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <locale.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/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/Xutil.h>
#define TNAME "xterm"
/* Arbitrary sizes */
#define ESC_TITLE_SIZ 256
#define ESC_BUF_SIZ 256
#define ESC_ARG_SIZ 16
#define DRAW_BUF_SIZ 1024
#define SERRNO strerror(errno)
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) < (b) ? (b) : (a))
#define LEN(a) (sizeof(a) / sizeof(a[0]))
#define DEFAULT(a, b) (a) = (a) ? (a) : (b)
#define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
#define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
#define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
/* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 };
enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT, CURSOR_HIDE, CURSOR_DRAW, CURSOR_SAVE, CURSOR_LOAD };
enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4 };
enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
enum { SCREEN_UPDATE, SCREEN_REDRAW };
typedef struct {
char c; /* character code */
char mode; /* attribute flags */
int fg; /* foreground */
int bg; /* background */
char state; /* state flags */
} Glyph;
typedef Glyph* Line;
typedef struct {
Glyph attr; /* current char attributes */
char hidden;
int x;
int y;
} TCursor;
/* CSI Escape sequence structs */
/* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
typedef struct {
char buf[ESC_BUF_SIZ]; /* raw string */
int len; /* raw string length */
char priv;
int arg[ESC_ARG_SIZ];
int narg; /* nb of args */
char mode;
} CSIEscape;
/* Internal representation of the screen */
typedef struct {
int row; /* nb row */
int col; /* nb col */
Line* line; /* screen */
TCursor c; /* cursor */
int top; /* top scroll limit */
int bot; /* bottom scroll limit */
int mode; /* terminal mode flags */
int esc; /* escape state flags */
char title[ESC_TITLE_SIZ];
int titlelen;
} Term;
/* Purely graphic info */
typedef struct {
Display* dis;
Window win;
int scr;
int w; /* window width */
int h; /* window height */
int ch; /* char height */
int cw; /* char width */
} XWindow;
typedef struct {
KeySym k;
char s[ESC_BUF_SIZ];
} Key;
#include "config.h"
/* Drawing Context */
typedef struct {
unsigned long col[LEN(colorname)];
XFontStruct* font;
GC gc;
} DC;
static void die(const char *errstr, ...);
static void draw(int);
static void execsh(void);
static void sigchld(int);
static void run(void);
static void csidump(void);
static void csihandle(void);
static void csiparse(void);
static void csireset(void);
static void tclearregion(int, int, int, int);
static void tcursor(int);
static void tmovecursor(int);
static void tdeletechar(int);
static void tdeleteline(int);
static void tinsertblank(int);
static void tinsertblankline(int);
static void tmoveto(int, int);
static void tnew(int, int);
static void tnewline(void);
static void tputc(char);
static void tputs(char*, int);
static void tresize(int, int);
static void tscroll(void);
static void tsetattr(int*, int);
static void tsetchar(char);
static void tsetscroll(int, int);
static void ttynew(void);
static void ttyread(void);
static void ttyresize(int, int);
static void ttywrite(const char *, size_t);
static unsigned long xgetcol(const char *);
static void xclear(int, int, int, int);
static void xcursor(int);
static void xdrawc(int, int, Glyph);
static void xinit(void);
static void xscroll(void);
static void expose(XEvent *);
static char * kmap(KeySym);
static void kpress(XEvent *);
static void resize(XEvent *);
static void (*handler[LASTEvent])(XEvent *) = {
[KeyPress] = kpress,
[Expose] = expose,
[ConfigureNotify] = resize
};
/* Globals */
static DC dc;
static XWindow xw;
static Term term;
static CSIEscape escseq;
static int cmdfd;
static pid_t pid;
static int running;
#ifdef DEBUG
void
tdump(void) {
int row, col;
Glyph c;
for(row = 0; row < term.row; row++) {
for(col = 0; col < term.col; col++) {
if(col == term.c.x && row == term.c.y)
putchar('#');
else {
c = term.line[row][col];
putchar(c.state & GLYPH_SET ? c.c : '.');
}
}
putchar('\n');
}
}
#endif
void
die(const char *errstr, ...) {
va_list ap;
va_start(ap, errstr);
vfprintf(stderr, errstr, ap);
va_end(ap);
exit(EXIT_FAILURE);
}
void
execsh(void) {
char *args[3] = {SHELL, "-i", NULL};
putenv("TERM=" TNAME);
execvp(SHELL, args);
}
void
xbell(void) { /* visual bell */
XRectangle r = { 0, 0, xw.w, xw.h };
XSetForeground(xw.dis, dc.gc, dc.col[BellCol]);
XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1);
/* usleep(30000); */
draw(SCREEN_REDRAW);
}
void
sigchld(int a) {
int stat = 0;
if(waitpid(pid, &stat, 0) < 0)
die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
if(WIFEXITED(stat))
exit(WEXITSTATUS(stat));
else
exit(EXIT_FAILURE);
}
void
ttynew(void) {
int m, s;
char *pts;
if((m = posix_openpt(O_RDWR | O_NOCTTY)) < 0)
die("openpt failed: %s\n", SERRNO);
if(grantpt(m) < 0)
die("grandpt failed: %s\n", SERRNO);
if(unlockpt(m) < 0)
die("unlockpt failed: %s\n", SERRNO);
if(!(pts = ptsname(m)))
die("ptsname failed: %s\n", SERRNO);
if((s = open(pts, O_RDWR | O_NOCTTY)) < 0)
die("Couldn't open slave: %s\n", SERRNO);
fcntl(s, F_SETFL, O_NDELAY);
switch(pid = fork()) {
case -1:
die("fork failed\n");
break;
case 0:
setsid(); /* create a new process group */
dup2(s, STDIN_FILENO);
dup2(s, STDOUT_FILENO);
dup2(s, STDERR_FILENO);
if(ioctl(s, TIOCSCTTY, NULL) < 0)
die("ioctl TTIOCSTTY failed: %s\n", SERRNO);
execsh();
break;
default:
close(s);
cmdfd = m;
signal(SIGCHLD, sigchld);
}
}
void
dump(char c) {
static int col;
fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
if(++col % 10 == 0)
fprintf(stderr, "\n");
}
void
ttyread(void) {
char buf[BUFSIZ] = {0};
int ret;
if((ret = read(cmdfd, buf, BUFSIZ)) < 0)
die("Couldn't read from shell: %s\n", SERRNO);
else
tputs(buf, ret);
}
void
ttywrite(const char *s, size_t n) {
if(write(cmdfd, s, n) == -1)
die("write error on tty: %s\n", SERRNO);
}
void
ttyresize(int x, int y) {
struct winsize w;
w.ws_row = term.row;
w.ws_col = term.col;
w.ws_xpixel = w.ws_ypixel = 0;
if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
}
void
tcursor(int mode) {
static TCursor c;
if(mode == CURSOR_SAVE)
c = term.c;
else if(mode == CURSOR_LOAD)
term.c = c, tmoveto(c.x, c.y);
}
void
tnew(int col, int row) { /* screen size */
term.row = row, term.col = col;
term.top = 0, term.bot = term.row - 1;
/* mode */
term.mode = MODE_WRAP;
/* cursor */
term.c.attr.mode = ATTR_NULL;
term.c.attr.fg = DefaultFG;
term.c.attr.bg = DefaultBG;
term.c.x = term.c.y = 0;
term.c.hidden = 0;
/* allocate screen */
term.line = calloc(term.row, sizeof(Line));
for(row = 0 ; row < term.row; row++)
term.line[row] = calloc(term.col, sizeof(Glyph));
}
void
tscroll(void) {
Line temp = term.line[term.top];
int i;
/* X stuff _before_ the line swapping (results in wrong line index) */
xscroll();
for(i = term.top; i < term.bot; i++)
term.line[i] = term.line[i+1];
memset(temp, 0, sizeof(Glyph) * term.col);
term.line[term.bot] = temp;
}
void
tnewline(void) {
int y = term.c.y + 1;
if(y > term.bot)
tscroll(), y = term.bot;
tmoveto(0, y);
}
void
csiparse(void) {
/* int noarg = 1; */
char *p = escseq.buf;
escseq.narg = 0;
if(*p == '?')
escseq.priv = 1, p++;
while(p < escseq.buf+escseq.len) {
while(isdigit(*p)) {
escseq.arg[escseq.narg] *= 10;
escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
}
if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
escseq.narg++, p++;
else {
escseq.mode = *p;
escseq.narg++;
return;
}
}
}
void
tmoveto(int x, int y) {
term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x;
term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y;
}
void
tmovecursor(int dir) {
int xf = term.c.x, yf = term.c.y;
switch(dir) {
case CURSOR_UP:
yf--;
break;
case CURSOR_DOWN:
yf++;
break;
case CURSOR_LEFT:
xf--;
if(term.mode & MODE_WRAP && xf < 0) {
xf = term.col-1, yf--;
if(yf < term.top)
yf = term.top, xf = 0;
}
break;
case CURSOR_RIGHT:
xf++;
if(term.mode & MODE_WRAP && xf >= term.col) {
xf = 0, yf++;
if(yf > term.bot)
yf = term.bot, tscroll();
}
break;
}
tmoveto(xf, yf);
}
void
tsetchar(char c) {
term.line[term.c.y][term.c.x] = term.c.attr;
term.line[term.c.y][term.c.x].c = c;
term.line[term.c.y][term.c.x].state |= GLYPH_SET | GLYPH_DIRTY;
}
void
tclearregion(int x1, int y1, int x2, int y2) {
int x, y;
LIMIT(x1, 0, term.col-1);
LIMIT(x2, 0, term.col-1);
LIMIT(y1, 0, term.row-1);
LIMIT(y2, 0, term.row-1);
/* XXX: could be optimized */
for(x = x1; x <= x2; x++)
for(y = y1; y <= y2; y++)
memset(&term.line[y][x], 0, sizeof(Glyph));
xclear(x1, y1, x2, y2);
}
void
tdeletechar(int n) {
int src = term.c.x + n;
int dst = term.c.x;
int size = term.col - src;
if(src >= term.col) {
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
return;
}
memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
tclearregion(term.col-size, term.c.y, term.col-1, term.c.y);
}
void
tinsertblank(int n) {
int src = term.c.x;
int dst = src + n;
int size = term.col - n - src;
if(dst >= term.col) {
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
return;
}
memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
tclearregion(src, term.c.y, dst, term.c.y);
}
void
tsetlinestate(int n, int state) {
int i;
for(i = 0; i < term.col; i++)
term.line[n][i].state |= state;
}
void
tinsertblankline(int n) {
int i;
Line blank;
int bot = term.bot;
if(term.c.y > term.bot)
bot = term.row - 1;
else if(term.c.y < term.top)
bot = term.top - 1;
if(term.c.y + n >= bot) {
tclearregion(0, term.c.y, term.col-1, bot);
return;
}
for(i = bot; i >= term.c.y+n; i--) {
/* swap deleted line <-> blanked line */
blank = term.line[i];
term.line[i] = term.line[i-n];
term.line[i-n] = blank;
/* blank it */
memset(blank, 0, term.col * sizeof(Glyph));
tsetlinestate(i, GLYPH_DIRTY);
tsetlinestate(i-n, GLYPH_DIRTY);
}
}
void
tdeleteline(int n) {
int i;
Line blank;
int bot = term.bot;
if(term.c.y > term.bot)
bot = term.row - 1;
else if(term.c.y < term.top)
bot = term.top - 1;
if(term.c.y + n >= bot) {
tclearregion(0, term.c.y, term.col-1, bot);
return;
}
for(i = term.c.y; i <= bot-n; i++) {
/* swap deleted line <-> blanked line */
blank = term.line[i];
term.line[i] = term.line[i+n];
term.line[i+n] = blank;
/* blank it */
memset(blank, 0, term.col * sizeof(Glyph));
tsetlinestate(i, GLYPH_DIRTY);
tsetlinestate(i-n, GLYPH_DIRTY);
}
}
void
tsetattr(int *attr, int l) {
int i;
for(i = 0; i < l; i++) {
switch(attr[i]) {
case 0:
term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
term.c.attr.fg = DefaultFG;
term.c.attr.bg = DefaultBG;
break;
case 1:
term.c.attr.mode |= ATTR_BOLD;
break;
case 4:
term.c.attr.mode |= ATTR_UNDERLINE;
break;
case 7:
term.c.attr.mode |= ATTR_REVERSE;
break;
case 8:
term.c.hidden = CURSOR_HIDE;
break;
case 22:
term.c.attr.mode &= ~ATTR_BOLD;
break;
case 24:
term.c.attr.mode &= ~ATTR_UNDERLINE;
break;
case 27:
term.c.attr.mode &= ~ATTR_REVERSE;
break;
case 39:
term.c.attr.fg = DefaultFG;
break;
case 49:
term.c.attr.fg = 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;
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
csihandle(void) {
switch(escseq.mode) {
default:
unknown:
printf("erresc: unknown sequence -- ");
csidump();
/* die(""); */
break;
case '@': /* ICH -- Insert <n> blank char */
DEFAULT(escseq.arg[0], 1);
tinsertblank(escseq.arg[0]);
break;
case 'A': /* CUU -- Cursor <n> Up */
case 'e':
DEFAULT(escseq.arg[0], 1);
tmoveto(term.c.x, term.c.y-escseq.arg[0]);
break;
case 'B': /* CUD -- Cursor <n> Down */
DEFAULT(escseq.arg[0], 1);
tmoveto(term.c.x, term.c.y+escseq.arg[0]);
break;
case 'C': /* CUF -- Cursor <n> Forward */
case 'a':
DEFAULT(escseq.arg[0], 1);
tmoveto(term.c.x+escseq.arg[0], term.c.y);
break;
case 'D': /* CUB -- Cursor <n> Backward */
DEFAULT(escseq.arg[0], 1);
tmoveto(term.c.x-escseq.arg[0], term.c.y);
break;
case 'E': /* CNL -- Cursor <n> Down and first col */
DEFAULT(escseq.arg[0], 1);
tmoveto(0, term.c.y+escseq.arg[0]);
break;
case 'F': /* CPL -- Cursor <n> Up and first col */
DEFAULT(escseq.arg[0], 1);
tmoveto(0, term.c.y-escseq.arg[0]);
break;
case 'G': /* CHA -- Move to <col> */
case '`': /* XXX: HPA -- same? */
DEFAULT(escseq.arg[0], 1);
tmoveto(escseq.arg[0]-1, term.c.y);
break;
case 'H': /* CUP -- Move to <row> <col> */
case 'f': /* XXX: HVP -- same? */
DEFAULT(escseq.arg[0], 1);
DEFAULT(escseq.arg[1], 1);
tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
break;
/* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
case 'J': /* ED -- Clear screen */
switch(escseq.arg[0]) {
case 0: /* below */
tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
break;
case 1: /* above */
tclearregion(0, 0, term.c.x, term.c.y);
break;
case 2: /* all */
tclearregion(0, 0, term.col-1, term.row-1);
break;
case 3: /* XXX: erase saved lines (xterm) */
default:
goto unknown;
}
break;
case 'K': /* EL -- Clear line */
switch(escseq.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': /* XXX: SU -- Scroll <n> line up (faked) */
case 'L': /* IL -- Insert <n> blank lines */
DEFAULT(escseq.arg[0], 1);
tinsertblankline(escseq.arg[0]);
break;
case 'l': /* RM -- Reset Mode */
if(escseq.priv) {
switch(escseq.arg[0]) {
case 1:
term.mode &= ~MODE_APPKEYPAD;
break;
case 7:
term.mode &= ~MODE_WRAP;
break;
case 12: /* att610 -- Stop blinking cursor (IGNORED) */
break;
case 25:
term.c.hidden = 1;
break;
case 1048: /* XXX: no alt. screen to erase/save */
case 1049:
tcursor(CURSOR_LOAD);
tclearregion(0, 0, term.col-1, term.row-1);
break;
default:
goto unknown;
}
} else {
switch(escseq.arg[0]) {
case 4:
term.mode &= ~MODE_INSERT;
break;
default:
goto unknown;
}
}
break;
case 'M': /* DL -- Delete <n> lines */
DEFAULT(escseq.arg[0], 1);
tdeleteline(escseq.arg[0]);
break;
case 'X': /* ECH -- Erase <n> char */
DEFAULT(escseq.arg[0], 1);
tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
break;
case 'P': /* DCH -- Delete <n> char */
DEFAULT(escseq.arg[0], 1);
tdeletechar(escseq.arg[0]);
break;
/* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
case 'd': /* VPA -- Move to <row> */
DEFAULT(escseq.arg[0], 1);
tmoveto(term.c.x, escseq.arg[0]-1);
break;
case 'h': /* SM -- Set terminal mode */
if(escseq.priv) {
switch(escseq.arg[0]) {
case 1:
term.mode |= MODE_APPKEYPAD;
break;
case 7:
term.mode |= MODE_WRAP;
break;
case 12: /* att610 -- Start blinking cursor (IGNORED) */
break;
case 25:
term.c.hidden = 0;
break;
case 1048:
case 1049: /* XXX: no alt. screen to erase/save */
tcursor(CURSOR_SAVE);
tclearregion(0, 0, term.col-1, term.row-1);
break;
default: goto unknown;
}
} else {
switch(escseq.arg[0]) {
case 4:
term.mode |= MODE_INSERT;
break;
default: goto unknown;
}
};
break;
case 'm': /* SGR -- Terminal attribute (color) */
tsetattr(escseq.arg, escseq.narg);
break;
case 'r': /* DECSTBM -- Set Scrolling Region */
if(escseq.priv)
goto unknown;
else {
DEFAULT(escseq.arg[0], 1);
DEFAULT(escseq.arg[1], term.row);
tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
}
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;
}
}
void
csidump(void) {
int i;
printf("ESC [ %s", escseq.priv ? "? " : "");
if(escseq.narg)
for(i = 0; i < escseq.narg; i++)
printf("%d ", escseq.arg[i]);
if(escseq.mode)
putchar(escseq.mode);
putchar('\n');
}
void
csireset(void) {
memset(&escseq, 0, sizeof(escseq));
}
void
tputtab(void) {
int space = TAB - term.c.x % TAB;
if(term.c.x + space >= term.col)
space--;
for(; space > 0; space--)
tmovecursor(CURSOR_RIGHT);
}
void
tputc(char c) {
/* dump(c); */
if(term.esc & ESC_START) {
if(term.esc & ESC_CSI) {
escseq.buf[escseq.len++] = c;
if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
term.esc = 0;
csiparse(), csihandle();
}
} else if(term.esc & ESC_OSC) {
if(c == ';') {
term.titlelen = 0;
term.esc = ESC_START | ESC_TITLE;
}
} else if(term.esc & ESC_TITLE) {
if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
term.esc = 0;
term.title[term.titlelen] = '\0';
XStoreName(xw.dis, xw.win, term.title);
} else {
term.title[term.titlelen++] = c;
}
} else if(term.esc & ESC_ALTCHARSET) {
switch(c) {
case '0': /* Line drawing crap */
term.c.attr.mode |= ATTR_GFX;
break;
case 'B': /* Back to regular text */
term.c.attr.mode &= ~ATTR_GFX;
break;
default:
printf("esc unhandled charset: ESC ( %c\n", c);
}
term.esc = 0;
} else {
switch(c) {
case '[':
term.esc |= ESC_CSI;
break;
case ']':
term.esc |= ESC_OSC;
break;
case '(':
term.esc |= ESC_ALTCHARSET;
break;
case 'A':
tmoveto(term.c.x, term.c.y-1);
term.esc = 0;
break;
case 'B':
tmoveto(term.c.x, term.c.y+1);
term.esc = 0;
break;
case 'C':
tmoveto(term.c.x+1, term.c.y);
term.esc = 0;
break;
case 'D':
tmoveto(term.c.x-1, term.c.y);
term.esc = 0;
break;
case '=': /* DECPAM */
term.mode |= MODE_APPKEYPAD;
term.esc = 0;
break;
case '>': /* DECPNM */
term.mode &= ~MODE_APPKEYPAD;
term.esc = 0;
break;
case '7':
tcursor(CURSOR_SAVE);
break;
case '8':
tcursor(CURSOR_LOAD);
break;
default:
fprintf(stderr, "erresc: unknown sequence ESC %02X '%c'\n", c, isprint(c)?c:'.');
term.esc = 0;
}
}
} else {
switch(c) {
case '\t':
tputtab();
break;
case '\b':
tmovecursor(CURSOR_LEFT);
break;
case '\r':
tmoveto(0, term.c.y);
break;
case '\n':
tnewline();
break;
case '\a':
xbell();
break;
case '\033':
csireset();
term.esc = ESC_START;
break;
default:
tsetchar(c);
tmovecursor(CURSOR_RIGHT);
break;
}
}
}
void
tputs(char *s, int len) {
for(; len > 0; len--)
tputc(*s++);
}
void
tresize(int col, int row) {
int i;
Line *line;
int minrow = MIN(row, term.row);
int mincol = MIN(col, term.col);
if(col < 1 || row < 1)
return;
/* alloc */
line = calloc(row, sizeof(Line));
for(i = 0 ; i < row; i++)
line[i] = calloc(col, sizeof(Glyph));
/* copy */
for(i = 0 ; i < minrow; i++)
memcpy(line[i], term.line[i], mincol * sizeof(Glyph));
/* free */
for(i = 0; i < term.row; i++)
free(term.line[i]);
free(term.line);
LIMIT(term.c.x, 0, col-1);
LIMIT(term.c.y, 0, row-1);
LIMIT(term.top, 0, row-1);
LIMIT(term.bot, 0, row-1);
term.bot = row-1;
term.line = line;
term.col = col, term.row = row;
}
unsigned long
xgetcol(const char *s) {
XColor color;
Colormap cmap = DefaultColormap(xw.dis, xw.scr);
if(!XAllocNamedColor(xw.dis, cmap, s, &color, &color)) {
color.pixel = WhitePixel(xw.dis, xw.scr);
fprintf(stderr, "Could not allocate color '%s'\n", s);
}
return color.pixel;
}
void
xclear(int x1, int y1, int x2, int y2) {
XClearArea(xw.dis, xw.win,
x1 * xw.cw, y1 * xw.ch,
(x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch,
False);
}
void
xscroll(void) {
int srcy = (term.top+1) * xw.ch;
int dsty = term.top * xw.ch;
int height = (term.bot-term.top) * xw.ch;
xcursor(CURSOR_HIDE);
XCopyArea(xw.dis, xw.win, xw.win, dc.gc, 0, srcy, xw.w, height, 0, dsty);
xclear(0, term.bot, term.col-1, term.bot);
}
void
xinit(void) {
XGCValues values;
unsigned long valuemask;
XClassHint chint;
XWMHints wmhint;
XSizeHints shint;
char *args[] = {NULL};
int i;
xw.dis = XOpenDisplay(NULL);
xw.scr = XDefaultScreen(xw.dis);
if(!xw.dis)
die("Can't open display\n");
/* font */
if(!(dc.font = XLoadQueryFont(xw.dis, FONT)))
die("Can't load font %s\n", FONT);
xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
xw.ch = dc.font->ascent + dc.font->descent + LINESPACE;
/* colors */
for(i = 0; i < LEN(colorname); i++)
dc.col[i] = xgetcol(colorname[i]);
term.c.attr.fg = DefaultFG;
term.c.attr.bg = DefaultBG;
term.c.attr.mode = ATTR_NULL;
/* windows */
xw.h = term.row * xw.ch;
xw.w = term.col * xw.cw;
/* XXX: this BORDER is useless after the first resize, handle it in xdraws() */
xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0,
xw.w, xw.h, BORDER,
dc.col[DefaultBG],
dc.col[DefaultBG]);
/* gc */
values.foreground = XWhitePixel(xw.dis, xw.scr);
values.font = dc.font->fid;
valuemask = GCForeground | GCFont;
dc.gc = XCreateGC(xw.dis, xw.win, valuemask, &values);
XMapWindow(xw.dis, xw.win);
/* wm stuff */
chint.res_name = TNAME, chint.res_class = TNAME;
wmhint.input = 1, wmhint.flags = InputHint;
shint.height_inc = xw.ch, shint.width_inc = xw.cw;
shint.height = xw.h, shint.width = xw.w;
shint.flags = PSize | PResizeInc;
XSetWMProperties(xw.dis, xw.win, NULL, NULL, &args[0], 0, &shint, &wmhint, &chint);
XStoreName(xw.dis, xw.win, TNAME);
XSync(xw.dis, 0);
}
void
xdraws(char *s, Glyph base, int x, int y, int len) {
unsigned long xfg, xbg;
int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw;
int i;
if(base.mode & ATTR_REVERSE)
xfg = dc.col[base.bg], xbg = dc.col[base.fg];
else
xfg = dc.col[base.fg], xbg = dc.col[base.bg];
XSetBackground(xw.dis, dc.gc, xbg);
XSetForeground(xw.dis, dc.gc, xfg);
if(base.mode & ATTR_GFX)
for(i = 0; i < len; i++)
s[i] = gfx[s[i]];
XDrawImageString(xw.dis, xw.win, dc.gc, winx, winy, s, len);
if(base.mode & ATTR_UNDERLINE)
XDrawLine(xw.dis, xw.win, dc.gc, winx, winy+1, winx+width-1, winy+1);
}
void
xdrawc(int x, int y, Glyph g) {
XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch };
unsigned long xfg, xbg;
/* reverse video */
if(g.mode & ATTR_REVERSE)
xfg = dc.col[g.bg], xbg = dc.col[g.fg];
else
xfg = dc.col[g.fg], xbg = dc.col[g.bg];
/* background */
XSetBackground(xw.dis, dc.gc, xbg);
XSetForeground(xw.dis, dc.gc, xfg);
XDrawImageString(xw.dis, xw.win, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1);
}
void
xcursor(int mode) {
static int oldx = 0;
static int oldy = 0;
Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0};
LIMIT(oldx, 0, term.col-1);
LIMIT(oldy, 0, term.row-1);
if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
g.c = term.line[term.c.y][term.c.x].c;
/* remove the old cursor */
if(term.line[oldy][oldx].state & GLYPH_SET)
xdrawc(oldx, oldy, term.line[oldy][oldx]);
else
xclear(oldx, oldy, oldx, oldy);
/* draw the new one */
if(mode == CURSOR_DRAW) {
xdrawc(term.c.x, term.c.y, g);
oldx = term.c.x, oldy = term.c.y;
}
}
void
draw(int redraw_all) {
int i, x, y, ox;
Glyph base, new;
char buf[DRAW_BUF_SIZ];
for(y = 0; y < term.row; y++) {
base = term.line[y][0];
i = ox = 0;
for(x = 0; x < term.col; x++) {
new = term.line[y][x];
if(!ATTRCMP(base, new) && i < DRAW_BUF_SIZ)
buf[i++] = new.c;
else {
xdraws(buf, base, ox, y, i);
buf[0] = new.c;
i = 1;
ox = x;
base = new;
}
}
xdraws(buf, base, ox, y, i);
}
if(!term.c.hidden)
xcursor(CURSOR_DRAW);
}
void
expose(XEvent *ev) {
draw(SCREEN_REDRAW);
}
char*
kmap(KeySym k) {
int i;
for(i = 0; i < LEN(key); i++)
if(key[i].k == k)
return (char*)key[i].s;
return NULL;
}
void
kpress(XEvent *ev) {
XKeyEvent *e = &ev->xkey;
KeySym ksym;
char buf[32];
char *customkey;
int len;
int meta;
int shift;
meta = e->state & Mod1Mask;
shift = e->state & ShiftMask;
len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
if(customkey = kmap(ksym))
ttywrite(customkey, strlen(customkey));
else if(len > 0) {
buf[sizeof(buf)-1] = '\0';
if(meta && len == 1)
ttywrite("\033", 1);
ttywrite(buf, len);
} else
switch(ksym) {
case XK_Up:
case XK_Down:
case XK_Left:
case XK_Right:
sprintf(buf, "\033%c%c", term.mode & MODE_APPKEYPAD ? 'O' : '[', "DACB"[ksym - XK_Left]);
ttywrite(buf, 3);
break;
case XK_Insert:
if(shift)
/* XXX: paste X clipboard */;
break;
default:
fprintf(stderr, "errkey: %d\n", (int)ksym);
break;
}
}
void
resize(XEvent *e) {
int col, row;
col = e->xconfigure.width / xw.cw;
row = e->xconfigure.height / xw.ch;
if(term.col != col || term.row != row) {
tresize(col, row);
ttyresize(col, row);
xw.w = e->xconfigure.width;
xw.h = e->xconfigure.height;
draw(SCREEN_REDRAW);
}
}
void
run(void) {
XEvent ev;
fd_set rfd;
int xfd = XConnectionNumber(xw.dis);
running = 1;
XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
XResizeWindow(xw.dis, xw.win, xw.w , xw.h); /* fix resize bug in wmii (?) */
while(running) {
FD_ZERO(&rfd);
FD_SET(cmdfd, &rfd);
FD_SET(xfd, &rfd);
if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) == -1) {
if(errno == EINTR)
continue;
die("select failed: %s\n", SERRNO);
}
if(FD_ISSET(cmdfd, &rfd)) {
ttyread();
draw(SCREEN_UPDATE);
}
while(XPending(xw.dis)) {
XNextEvent(xw.dis, &ev);
if(handler[ev.type])
(handler[ev.type])(&ev);
}
}
}
int
main(int argc, char *argv[]) {
if(argc == 2 && !strncmp("-v", argv[1], 3))
die("st-" VERSION ", © 2009 st engineers\n");
else if(argc != 1)
die("usage: st [-v]\n");
setlocale(LC_CTYPE, "");
tnew(80, 24);
ttynew();
xinit();
run();
return 0;
}
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