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My build of suckless st terminal
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/* See LICENSE for licence details. */
#define _XOPEN_SOURCE 600
#include <ctype.h>
#include <errno.h>
#include <fcntl.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 "st"
/* Arbitrary sizes */
#define ESCSIZ 256
#define ESCARG 16
#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)
/* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
enum { ATnone=0 , ATreverse=1 , ATunderline=2, ATbold=4 };
enum { CSup, CSdown, CSright, CSleft, CShide, CSdraw, CSwrap, CSsave, CSload };
enum { CRset=1, CRupdate=2 };
enum { TMwrap=1, TMinsert=2 };
enum { SCupdate, SCredraw };
typedef int Color;
typedef struct {
KeySym k;
char s[ESCSIZ];
} Key;
typedef struct {
char c; /* character code */
char mode; /* attribute flags */
Color fg; /* foreground */
Color bg; /* background */
char state; /* state flag */
} Glyph;
typedef Glyph* Line;
typedef struct {
Glyph attr; /* current char attributes */
char hidden;
int x;
int y;
} TCursor;
/* Escape sequence structs */
/* ESC <pre> [[ [<priv>] <arg> [;]] <mode>] */
typedef struct {
char buf[ESCSIZ+1]; /* raw string */
int len; /* raw string length */
char pre;
char priv;
int arg[ESCARG+1];
int narg; /* nb of args */
char mode;
} Escseq;
/* 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 */
} 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;
#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 int escaddc(char);
static int escfinal(char);
static void escdump(void);
static void eschandle(void);
static void escparse(void);
static void escreset(void);
static void tclearregion(int, int, int, int);
static void tcpos(int);
static void tcursor(int);
static void tdeletechar(int);
static void tdeleteline(int);
static void tdump(void);
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 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 Escseq escseq;
static int cmdfd;
static pid_t pid;
static int running;
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(SCredraw);
}
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;
switch(ret = read(cmdfd, buf, BUFSIZ)) {
case -1:
die("Couldn't read from shell: %s\n", SERRNO);
break;
default:
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);
}
int
escfinal(char c) {
if(escseq.len == 1)
switch(c) {
case '[':
case ']':
case '(':
return 0;
case '=':
case '>':
default:
return 1;
}
else if(BETWEEN(c, 0x40, 0x7E))
return 1;
return 0;
}
void
tcpos(int mode) {
static int x = 0;
static int y = 0;
if(mode == CSsave)
x = term.c.x, y = term.c.y;
else if(mode == CSload)
tmoveto(x, 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 = TMwrap;
/* cursor */
term.c.attr.mode = ATnone;
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);
}
int
escaddc(char c) {
escseq.buf[escseq.len++] = c;
if(escfinal(c) || escseq.len >= ESCSIZ) {
escparse(), eschandle();
return 0;
}
return 1;
}
void
escparse(void) {
/* int noarg = 1; */
char *p = escseq.buf;
escseq.narg = 0;
switch(escseq.pre = *p++) {
case '[': /* CSI */
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++, p++;
else {
escseq.mode = *p;
escseq.narg++;
return;
}
}
break;
case '(':
/* XXX: graphic character set */
break;
}
}
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
tcursor(int dir) {
int xf = term.c.x, yf = term.c.y;
switch(dir) {
case CSup:
yf--;
break;
case CSdown:
yf++;
break;
case CSleft:
xf--;
if(xf < 0) {
xf = term.col-1, yf--;
if(yf < term.top)
yf = term.top, xf = 0;
}
break;
case CSright:
xf++;
if(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 |= CRset | CRupdate;
}
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, CRupdate);
tsetlinestate(i-n, CRupdate);
}
}
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, CRupdate);
tsetlinestate(i-n, CRupdate);
}
}
void
tsetattr(int *attr, int l) {
int i;
for(i = 0; i < l; i++) {
switch(attr[i]) {
case 0:
memset(&term.c.attr, 0, sizeof(term.c.attr));
term.c.attr.fg = DefaultFG;
term.c.attr.bg = DefaultBG;
break;
case 1:
term.c.attr.mode |= ATbold;
break;
case 4:
term.c.attr.mode |= ATunderline;
break;
case 7:
term.c.attr.mode |= ATreverse;
break;
case 8:
term.c.hidden = CShide;
break;
case 22:
term.c.attr.mode &= ~ATbold;
break;
case 24:
term.c.attr.mode &= ~ATunderline;
break;
case 27:
term.c.attr.mode &= ~ATreverse;
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
eschandle(void) {
switch(escseq.pre) {
default:
goto unknown_seq;
case '[':
switch(escseq.mode) {
default:
unknown_seq:
fprintf(stderr, "erresc: unknown sequence\n");
escdump();
break;
case '@': /* Insert <n> blank char */
DEFAULT(escseq.arg[0], 1);
tinsertblank(escseq.arg[0]);
break;
case 'A': /* Cursor <n> Up */
case 'e':
DEFAULT(escseq.arg[0], 1);
tmoveto(term.c.x, term.c.y-escseq.arg[0]);
break;
case 'B': /* Cursor <n> Down */
DEFAULT(escseq.arg[0], 1);
tmoveto(term.c.x, term.c.y+escseq.arg[0]);
break;
case 'C': /* Cursor <n> Forward */
case 'a':
DEFAULT(escseq.arg[0], 1);
tmoveto(term.c.x+escseq.arg[0], term.c.y);
break;
case 'D': /* Cursor <n> Backward */
DEFAULT(escseq.arg[0], 1);
tmoveto(term.c.x-escseq.arg[0], term.c.y);
break;
case 'E': /* Cursor <n> Down and first col */
DEFAULT(escseq.arg[0], 1);
tmoveto(0, term.c.y+escseq.arg[0]);
break;
case 'F': /* Cursor <n> Up and first col */
DEFAULT(escseq.arg[0], 1);
tmoveto(0, term.c.y-escseq.arg[0]);
break;
case 'G': /* Move to <col> */
case '`':
DEFAULT(escseq.arg[0], 1);
tmoveto(escseq.arg[0]-1, term.c.y);
break;
case 'H': /* Move to <row> <col> */
case 'f':
DEFAULT(escseq.arg[0], 1);
DEFAULT(escseq.arg[1], 1);
tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
break;
case 'J': /* 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;
}
break;
case 'K': /* 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 'L': /* Insert <n> blank lines */
DEFAULT(escseq.arg[0], 1);
tinsertblankline(escseq.arg[0]);
break;
case 'l':
if(escseq.priv && escseq.arg[0] == 25)
term.c.hidden = 1;
break;
case 'M': /* Delete <n> lines */
DEFAULT(escseq.arg[0], 1);
tdeleteline(escseq.arg[0]);
break;
case 'P': /* Delete <n> char */
DEFAULT(escseq.arg[0], 1);
tdeletechar(escseq.arg[0]);
break;
case 'd': /* Move to <row> */
DEFAULT(escseq.arg[0], 1);
tmoveto(term.c.x, escseq.arg[0]-1);
break;
case 'h': /* Set terminal mode */
if(escseq.priv && escseq.arg[0] == 25)
term.c.hidden = 0;
break;
case 'm': /* Terminal attribute (color) */
tsetattr(escseq.arg, escseq.narg);
break;
case 'r':
if(escseq.priv)
;
else {
DEFAULT(escseq.arg[0], 1);
DEFAULT(escseq.arg[1], term.row);
tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
}
break;
case 's': /* Save cursor position */
tcpos(CSsave);
break;
case 'u': /* Load cursor position */
tcpos(CSload);
break;
}
break;
}
}
void
escdump(void) {
int i;
printf("rawbuf : %s\n", escseq.buf);
printf("prechar : %c\n", escseq.pre);
printf("private : %c\n", escseq.priv ? '?' : ' ');
printf("narg : %d\n", escseq.narg);
if(escseq.narg)
for(i = 0; i < escseq.narg; i++)
printf("\targ %d = %d\n", i, escseq.arg[i]);
printf("mode : %c\n", escseq.mode);
}
void
escreset(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--)
tcursor(CSright);
}
void
tputc(char c) {
static int inesc = 0;
#if 0
dump(c);
#endif
/* start of escseq */
if(c == '\033')
escreset(), inesc = 1;
else if(inesc) {
inesc = escaddc(c);
} /* normal char */
else switch(c) {
default:
tsetchar(c);
tcursor(CSright);
break;
case '\t':
tputtab();
break;
case '\b':
tcursor(CSleft);
break;
case '\r':
tmoveto(0, term.c.y);
break;
case '\n':
tnewline();
break;
case '\a':
xbell();
break;
}
}
void
tputs(char *s, int len) {
for(; len > 0; len--)
tputc(*s++);
}
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 & CRset ? c.c : '.');
}
}
putchar('\n');
}
}
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(CShide);
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 = ATnone;
/* 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
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 & ATreverse)
xfg = dc.col[g.bg], xbg = dc.col[g.fg];
else
xfg = dc.col[g.fg], xbg = dc.col[g.bg];
/* background */
XSetForeground(xw.dis, dc.gc, xbg);
XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1);
/* string */
XSetForeground(xw.dis, dc.gc, xfg);
XDrawString(xw.dis, xw.win, dc.gc, r.x, r.y+dc.font->ascent, &(g.c), 1);
if(g.mode & ATbold) /* XXX: bold hack (draw again at x+1) */
XDrawString(xw.dis, xw.win, dc.gc, r.x+1, r.y+dc.font->ascent, &(g.c), 1);
/* underline */
if(g.mode & ATunderline) {
r.y += dc.font->ascent + 1;
XDrawLine(xw.dis, xw.win, dc.gc, r.x, r.y, r.x+r.width-1, r.y);
}
}
void
xcursor(int mode) {
static int oldx = 0;
static int oldy = 0;
Glyph g = {' ', ATnone, 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 & CRset)
g.c = term.line[term.c.y][term.c.x].c;
/* remove the old cursor */
if(term.line[oldy][oldx].state & CRset)
xdrawc(oldx, oldy, term.line[oldy][oldx]);
else
xclear(oldx, oldy, oldx, oldy);
/* draw the new one */
if(mode == CSdraw) {
xdrawc(term.c.x, term.c.y, g);
oldx = term.c.x, oldy = term.c.y;
}
}
void
draw(int redraw_all) {
int x, y;
int changed, set;
if(redraw_all)
XClearWindow(xw.dis, xw.win);
/* XXX: drawing could be optimised */
for(y = 0; y < term.row; y++) {
for(x = 0; x < term.col; x++) {
changed = term.line[y][x].state & CRupdate;
set = term.line[y][x].state & CRset;
if(redraw_all || changed) {
term.line[y][x].state &= ~CRupdate;
if(set)
xdrawc(x, y, term.line[y][x]);
else
xclear(x, y, x, y);
}
}
}
xcursor(CSdraw);
}
void
expose(XEvent *ev) {
draw(SCredraw);
}
void
kpress(XEvent *ev) {
XKeyEvent *e = &ev->xkey;
KeySym ksym;
char buf[32];
int len;
int meta;
int shift;
meta = e->state & Mod1Mask;
shift = e->state & ShiftMask;
len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
if(key[ksym])
ttywrite(key[ksym], strlen(key[ksym]));
else if(len > 0) {
buf[sizeof(buf)-1] = '\0';
if(meta && len == 1)
ttywrite("\033", 1);
ttywrite(buf, len);
} else
switch(ksym) {
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(SCredraw);
}
}
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(SCupdate);
}
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;
}