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-rw-r--r--st.c926
1 files changed, 915 insertions, 11 deletions
diff --git a/st.c b/st.c
index 8a8804f..d5f004b 100644
--- a/st.c
+++ b/st.c
@@ -1,17 +1,921 @@
-/* See LICENSE file for copyright and license details. */
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
+/* See LICENSE for licence details. */
+#include "st.h"
+
+/* Globals */
+DC dc;
+XWindow xw;
+Term term;
+Escseq escseq;
+int cmdfd;
+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);
+ XFlush(xw.dis);
+ usleep(30000);
+ draw(SCredraw);
+}
+
+void
+ttynew(void) {
+ int m, s;
+ pid_t pid;
+ char *pts;
+
+ if((m = posix_openpt(O_RDWR | O_NOCTTY)) < 0)
+ die("openpt");
+ if(grantpt(m) == -1)
+ die("grandpt");
+ if(unlockpt(m) == -1)
+ die("unlockpt");
+ if((pts = ptsname(m)) == NULL)
+ die("ptsname");
+ if((s = open(pts, O_RDWR | O_NOCTTY)) < 0)
+ die("slave open");
+ fcntl(s, F_SETFL, O_NDELAY);
+ switch(pid = fork()) {
+ case -1:
+ die("fork");
+ 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("slave TTIOCSTTY");
+ execsh();
+ break;
+ default:
+ close(s);
+ cmdfd = m;
+ }
+}
+
+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: /* error or exit */
+ /* XXX: be more precise */
+ running = 0;
+ break;
+ default:
+ tputs(buf, ret);
+ }
+}
+
+void
+ttywrite(char *s, size_t n) {
+ if(write(cmdfd, s, n) == -1)
+ die("write error on tty.");
+}
+
+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: %m\n");
+}
int
-main(int argc, char *argv[]) {
- if(argc == 2 && !strcmp("-v", argv[1])) {
- fprintf(stderr, "st-"VERSION", © 2007-2008 st engineers, see LICENSE for details\n");
- exit(EXIT_SUCCESS);
+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;
+
+ 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;
+ xscroll();
+}
+
+void
+tnewline(void) {
+ int y = term.c.y + 1;
+
+ if(y > term.bot) {
+ tscroll(), y = term.bot;
}
- else if(argc != 1) {
- fprintf(stderr, "usage: st [-v]\n");
- exit(EXIT_FAILURE);
+ 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 '(':
+ /* humf charset stuff */
+ 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 xi = term.c.x, yi = term.c.y;
+ int xf = xi, yf = yi;
+
+ 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
+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));
+ }
+}
+
+
+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));
+ }
+}
+
+void
+tsetattr(int *attr, int l) {
+ int i;
+
+#ifdef TRUECOLOR /* ESC [ ? <fg/bg> ; <r> ; <g> ; <b> m */
+ Color col;
+ if(escseq.priv && escseq.len == 4) { /* True color extension :) */
+ col = (escseq.arg[1]<<16) + (escseq.arg[2]<<8) + escseq.arg[3];
+ switch(escseq.arg[0]) {
+ case 3: /* foreground */
+ term.c.attr.fg = col;
+ break;
+ case 4: /* background */
+ term.c.attr.bg = col;
+ break;
+ }
+ }
+ else
+#endif
+ 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) {
+ /* escdump(); */
+ switch(escseq.pre) {
+ case '[':
+ switch(escseq.mode) {
+ 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 '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 */
+ 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;
+ puts("------");
+ 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
+tputc(char c) {
+ static int inesc = 0;
+
+ dump(c);
+ /* 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 '\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;
+ line = calloc(row, sizeof(Line));
+ for(i = 0 ; i < row; i++)
+ line[i] = calloc(col, sizeof(Glyph));
+ for(i = 0 ; i < minrow; i++) {
+ memcpy(line[i], term.line[i], mincol * sizeof(Glyph));
+ 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);
+ // if(term.bot == term.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);
+ /* font */
+ dc.font = XLoadQueryFont(xw.dis, 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};
+
+ 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); /* XXX: maybe a bug */
+ if(mode == CSdraw && !term.c.hidden) {
+ 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((changed && set) || (redraw_all && set)) {
+ term.line[y][x].state &= ~CRupdate;
+ xdrawc(x, y, term.line[y][x]);
+ }
+ }
+ }
+ xcursor(CSdraw);
+}
+
+void
+kpress(XKeyEvent *e) {
+ KeySym ksym;
+ char buf[32];
+ int len;
+ int meta;
+ int shift;
+
+ meta = e->state & Mod4Mask;
+ shift = e->state & ShiftMask;
+ len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
+ if(len > 0) {
+ buf[sizeof(buf)-1] = '\0';
+ if(meta && len == 1)
+ ttywrite("\033", 1);
+ ttywrite(buf, len);
+ return;
+ }
+ switch(ksym) {
+#ifdef DEBUG1
+ default:
+ printf("errkey: %d\n", (int)ksym);
+ break;
+#endif
+ case XK_Up:
+ case XK_Down:
+ case XK_Left:
+ case XK_Right:
+ sprintf(buf, "\033[%c", "DACB"[ksym - XK_Left]);
+ ttywrite(buf, 3);
+ break;
+ case XK_Delete: ttywrite(KEYDELETE, sizeof(KEYDELETE)-1); break;
+ case XK_Home: ttywrite( KEYHOME, sizeof( KEYHOME)-1); break;
+ case XK_End: ttywrite( KEYEND, sizeof( KEYEND)-1); break;
+ case XK_Prior: ttywrite( KEYPREV, sizeof( KEYPREV)-1); break;
+ case XK_Next: ttywrite( KEYNEXT, sizeof( KEYNEXT)-1); break;
+ case XK_Insert:
+ /* XXX: paste X clipboard */
+ if(shift);
+ 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) {
+ int ret;
+ XEvent ev;
+ fd_set rfd;
+ struct timeval tv = {0, 10000};
+
+ running = 1;
+ XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
+ XResizeWindow(xw.dis, xw.win, xw.w , xw.h); /* seems to fix the resize bug in wmii */
+ while(running) {
+ while(XPending(xw.dis)) {
+ XNextEvent(xw.dis, &ev);
+ switch (ev.type) {
+ default:
+ break;
+ case KeyPress:
+ kpress(&ev.xkey);
+ break;
+ case Expose:
+ draw(SCredraw);
+ break;
+ case ConfigureNotify:
+ resize(&ev);
+ break;
+ }
+ }
+ FD_ZERO(&rfd);
+ FD_SET(cmdfd, &rfd);
+ ret = select(cmdfd+1, &rfd, NULL, NULL, &tv);
+ if(ret < 0) {
+ fprintf(stderr, "select: %m\n");
+ running = 0;
+ }
+ if(!ret)
+ continue;
+ if(FD_ISSET(cmdfd, &rfd)) {
+ ttyread();
+ draw(SCupdate);
+ }
+ }
+}
+
+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;
}