+isfullutf8(char *s, int b) {
+ uchar *c1, *c2, *c3;
+
+ c1 = (uchar *) s;
+ c2 = (uchar *) ++s;
+ c3 = (uchar *) ++s;
+ if(b < 1)
+ return 0;
+ else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
+ return 0;
+ else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
+ ((b == 1) ||
+ ((b == 2) && (*c2&(B7|B6)) == B7)))
+ return 0;
+ else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
+ ((b == 1) ||
+ ((b == 2) && (*c2&(B7|B6)) == B7) ||
+ ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
+ return 0;
+ else
+ return 1;
+}
+
+int
+utf8size(char *s) {
+ uchar c = *s;
+
+ if(~c&B7)
+ return 1;
+ else if((c&(B7|B6|B5)) == (B7|B6))
+ return 2;
+ else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
+ return 3;
+ else
+ return 4;
+}
+
+void
+selinit(void) {
+ memset(&sel.tclick1, 0, sizeof(sel.tclick1));
+ memset(&sel.tclick2, 0, sizeof(sel.tclick2));
+ sel.mode = 0;
+ sel.bx = -1;
+ sel.clip = NULL;
+ sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
+ if(sel.xtarget == None)
+ sel.xtarget = XA_STRING;
+}
+
+static inline bool
+selected(int x, int y) {
+ if(sel.ey == y && sel.by == y) {
+ int bx = MIN(sel.bx, sel.ex);
+ int ex = MAX(sel.bx, sel.ex);
+ return BETWEEN(x, bx, ex);
+ }
+ return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
+ || (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
+}
+
+void
+getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
+ if(b)
+ *b = e->xbutton.button;
+
+ *x = X2COL(e->xbutton.x);
+ *y = Y2ROW(e->xbutton.y);
+ sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
+ sel.b.y = MIN(sel.by, sel.ey);
+ sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
+ sel.e.y = MAX(sel.by, sel.ey);
+}
+
+void
+mousereport(XEvent *e) {
+ int x = X2COL(e->xbutton.x);
+ int y = Y2ROW(e->xbutton.y);
+ int button = e->xbutton.button;
+ int state = e->xbutton.state;
+ char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
+ static int ob, ox, oy;
+
+ /* from urxvt */
+ if(e->xbutton.type == MotionNotify) {
+ if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
+ return;
+ button = ob + 32;
+ ox = x, oy = y;
+ } else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
+ button = 3;
+ } else {
+ button -= Button1;
+ if(button >= 3)
+ button += 64 - 3;
+ if(e->xbutton.type == ButtonPress) {
+ ob = button;
+ ox = x, oy = y;
+ }
+ }
+
+ buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
+ + (state & Mod4Mask ? 8 : 0)
+ + (state & ControlMask ? 16 : 0);
+
+ ttywrite(buf, sizeof(buf));
+}
+
+void
+bpress(XEvent *e) {
+ if(IS_SET(MODE_MOUSE))
+ mousereport(e);
+ else if(e->xbutton.button == Button1) {
+ if(sel.bx != -1)
+ tsetdirt(sel.b.y, sel.e.y);
+ sel.mode = 1;
+ sel.ex = sel.bx = X2COL(e->xbutton.x);
+ sel.ey = sel.by = Y2ROW(e->xbutton.y);
+ }
+}
+
+void
+selcopy(void) {
+ char *str, *ptr;
+ int x, y, bufsize, is_selected = 0;
+
+ if(sel.bx == -1)
+ str = NULL;
+
+ else {
+ bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
+ ptr = str = malloc(bufsize);
+
+ /* append every set & selected glyph to the selection */
+ for(y = 0; y < term.row; y++) {
+ for(x = 0; x < term.col; x++) {
+ is_selected = selected(x, y);
+ if((term.line[y][x].state & GLYPH_SET) && is_selected) {
+ int size = utf8size(term.line[y][x].c);
+ memcpy(ptr, term.line[y][x].c, size);
+ ptr += size;
+ }
+ }
+
+ /* \n at the end of every selected line except for the last one */
+ if(is_selected && y < sel.e.y)
+ *ptr++ = '\n';
+ }
+ *ptr = 0;
+ }
+ xsetsel(str);
+}
+
+void
+selnotify(XEvent *e) {
+ ulong nitems, ofs, rem;
+ int format;
+ uchar *data;
+ Atom type;
+
+ ofs = 0;
+ do {
+ if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
+ False, AnyPropertyType, &type, &format,
+ &nitems, &rem, &data)) {
+ fprintf(stderr, "Clipboard allocation failed\n");
+ return;
+ }
+ ttywrite((const char *) data, nitems * format / 8);
+ XFree(data);
+ /* number of 32-bit chunks returned */
+ ofs += nitems * format / 32;
+ } while(rem > 0);
+}
+
+void
+selpaste() {
+ XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
+}
+
+void
+selrequest(XEvent *e) {
+ XSelectionRequestEvent *xsre;
+ XSelectionEvent xev;
+ Atom xa_targets;
+
+ xsre = (XSelectionRequestEvent *) e;
+ xev.type = SelectionNotify;
+ xev.requestor = xsre->requestor;
+ xev.selection = xsre->selection;
+ xev.target = xsre->target;
+ xev.time = xsre->time;
+ /* reject */
+ xev.property = None;
+
+ xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
+ if(xsre->target == xa_targets) {
+ /* respond with the supported type */
+ Atom string = sel.xtarget;
+ XChangeProperty(xsre->display, xsre->requestor, xsre->property,
+ XA_ATOM, 32, PropModeReplace,
+ (uchar *) &string, 1);
+ xev.property = xsre->property;
+ } else if(xsre->target == sel.xtarget && sel.clip != NULL) {
+ XChangeProperty(xsre->display, xsre->requestor, xsre->property,
+ xsre->target, 8, PropModeReplace,
+ (uchar *) sel.clip, strlen(sel.clip));
+ xev.property = xsre->property;
+ }
+
+ /* all done, send a notification to the listener */
+ if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
+ fprintf(stderr, "Error sending SelectionNotify event\n");
+}
+
+void
+xsetsel(char *str) {
+ /* register the selection for both the clipboard and the primary */
+ Atom clipboard;
+
+ free(sel.clip);
+ sel.clip = str;
+
+ XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
+
+ clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
+ XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
+
+ XFlush(xw.dpy);
+}
+
+void
+brelease(XEvent *e) {
+ if(IS_SET(MODE_MOUSE)) {
+ mousereport(e);
+ return;
+ }
+ if(e->xbutton.button == Button2)
+ selpaste();
+ else if(e->xbutton.button == Button1) {
+ sel.mode = 0;
+ getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
+ term.dirty[sel.ey] = 1;
+ if(sel.bx == sel.ex && sel.by == sel.ey) {
+ struct timeval now;
+ sel.bx = -1;
+ gettimeofday(&now, NULL);
+
+ if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
+ /* triple click on the line */
+ sel.b.x = sel.bx = 0;
+ sel.e.x = sel.ex = term.col;
+ sel.b.y = sel.e.y = sel.ey;
+ selcopy();
+ } else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
+ /* double click to select word */
+ sel.bx = sel.ex;
+ while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
+ term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
+ sel.b.x = sel.bx;
+ while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
+ term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
+ sel.e.x = sel.ex;
+ sel.b.y = sel.e.y = sel.ey;
+ selcopy();
+ }
+ } else
+ selcopy();
+ }
+ memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
+ gettimeofday(&sel.tclick1, NULL);
+ draw();
+}
+
+void
+bmotion(XEvent *e) {
+ if(IS_SET(MODE_MOUSE)) {
+ mousereport(e);
+ return;
+ }
+ if(sel.mode) {
+ int oldey = sel.ey, oldex = sel.ex;
+ getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
+
+ if(oldey != sel.ey || oldex != sel.ex) {
+ int starty = MIN(oldey, sel.ey);
+ int endy = MAX(oldey, sel.ey);
+ tsetdirt(starty, endy);
+ draw();
+ }
+ }
+}
+
+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;
+ char *envshell = getenv("SHELL");
+
+ DEFAULT(envshell, SHELL);
+ putenv("TERM="TNAME);
+ args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
+ execvp(args[0], args);
+ exit(EXIT_FAILURE);
+}
+
+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;
+
+ /* seems to work fine on linux, openbsd and freebsd */
+ struct winsize w = {term.row, term.col, 0, 0};
+ if(openpty(&m, &s, NULL, NULL, &w) < 0)
+ die("openpty failed: %s\n", SERRNO);
+
+ 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 TIOCSCTTY failed: %s\n", SERRNO);
+ close(s);
+ close(m);
+ execsh();
+ break;
+ default:
+ close(s);
+ cmdfd = m;
+ signal(SIGCHLD, sigchld);
+ if (opt_io && !(fileio = fopen(opt_io, "w"))) {
+ fprintf(stderr, "Error opening %s:%s",
+ opt_io, strerror(errno));
+ }
+ }
+}
+
+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) {
+ static char buf[BUFSIZ];
+ static int buflen = 0;
+ char *ptr;
+ char s[UTF_SIZ];
+ int charsize; /* size of utf8 char in bytes */
+ long utf8c;
+ int ret;
+
+ /* append read bytes to unprocessed bytes */
+ if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
+ die("Couldn't read from shell: %s\n", SERRNO);
+
+ /* process every complete utf8 char */
+ buflen += ret;
+ ptr = buf;
+ while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
+ charsize = utf8decode(ptr, &utf8c);
+ utf8encode(&utf8c, s);
+ tputc(s);
+ ptr += charsize;
+ buflen -= charsize;
+ }
+
+ /* keep any uncomplete utf8 char for the next call */
+ memmove(buf, ptr, buflen);
+}
+
+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
+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
+tfulldirt(void)
+{
+ tsetdirt(0, term.row-1);
+}
+
+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
+treset(void) {
+ unsigned 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 = TAB; i < term.col; i += TAB)
+ term.tabs[i] = 1;
+ term.top = 0, term.bot = term.row - 1;
+ term.mode = MODE_WRAP;
+ tclearregion(0, 0, term.col-1, term.row-1);
+}
+
+void
+tnew(int col, int row) {
+ /* set screen size */
+ term.row = row, term.col = col;
+ term.line = malloc(term.row * sizeof(Line));
+ term.alt = malloc(term.row * sizeof(Line));
+ term.dirty = malloc(term.row * sizeof(*term.dirty));
+ term.tabs = malloc(term.col * sizeof(*term.tabs));
+
+ for(row = 0; row < term.row; row++) {
+ term.line[row] = malloc(term.col * sizeof(Glyph));
+ term.alt [row] = malloc(term.col * sizeof(Glyph));
+ term.dirty[row] = 0;
+ }
+ memset(term.tabs, 0, term.col * sizeof(*term.tabs));
+ /* setup screen */
+ 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);
+
+ 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;
+
+ term.dirty[i] = 1;
+ term.dirty[i-n] = 1;
+ }
+
+ 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);
+
+ for(i = orig; i <= term.bot-n; i++) {
+ temp = term.line[i];
+ term.line[i] = term.line[i+n];
+ term.line[i+n] = temp;
+
+ term.dirty[i] = 1;
+ term.dirty[i+n] = 1;
+ }
+
+ selscroll(orig, -n);
+}
+
+void
+selscroll(int orig, int n) {
+ if(sel.bx == -1)
+ return;
+
+ if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
+ if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
+ sel.bx = -1;
+ return;
+ }
+ if(sel.by < term.top) {
+ sel.by = term.top;
+ sel.bx = 0;
+ }
+ if(sel.ey > term.bot) {
+ sel.ey = term.bot;
+ sel.ex = term.col;
+ }
+ sel.b.y = sel.by, sel.b.x = sel.bx;
+ sel.e.y = sel.ey, sel.e.x = sel.ex;
+ }
+}
+
+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) {
+ /* int noarg = 1; */
+ char *p = csiescseq.buf;
+
+ csiescseq.narg = 0;
+ if(*p == '?')
+ csiescseq.priv = 1, p++;
+
+ while(p < csiescseq.buf+csiescseq.len) {
+ while(isdigit(*p)) {
+ csiescseq.arg[csiescseq.narg] *= 10;
+ csiescseq.arg[csiescseq.narg] += *p++ - '0'/*, noarg = 0 */;
+ }
+ if(*p == ';' && csiescseq.narg+1 < ESC_ARG_SIZ)
+ csiescseq.narg++, p++;
+ else {
+ csiescseq.mode = *p;
+ csiescseq.narg++;
+ return;
+ }
+ }
+}
+
+void
+tmoveto(int x, int y) {
+ LIMIT(x, 0, term.col-1);
+ LIMIT(y, 0, term.row-1);
+ term.c.state &= ~CURSOR_WRAPNEXT;
+ term.c.x = x;
+ term.c.y = y;
+}
+
+void
+tsetchar(char *c) {
+ term.dirty[term.c.y] = 1;
+ term.line[term.c.y][term.c.x] = term.c.attr;
+ memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
+ term.line[term.c.y][term.c.x].state |= GLYPH_SET;
+}
+
+void
+tclearregion(int x1, int y1, int x2, int y2) {
+ int x, y, temp;
+
+ 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++)
+ term.line[y][x].state = 0;
+ }
+}
+
+void
+tdeletechar(int n) {
+ int src = term.c.x + n;
+ int dst = term.c.x;
+ int size = term.col - src;
+
+ term.dirty[term.c.y] = 1;
+
+ 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-n, 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 - dst;
+
+ term.dirty[term.c.y] = 1;
+
+ 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 - 1, term.c.y);
+}
+
+void
+tinsertblankline(int n) {
+ if(term.c.y < term.top || term.c.y > term.bot)
+ return;
+
+ tscrolldown(term.c.y, n);
+}
+
+void
+tdeleteline(int n) {
+ if(term.c.y < term.top || term.c.y > term.bot)
+ return;
+
+ tscrollup(term.c.y, n);
+}
+
+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 3: /* enter standout (highlight) mode TODO: make it italic */
+ term.c.attr.mode |= ATTR_REVERSE;
+ break;
+ case 4:
+ term.c.attr.mode |= ATTR_UNDERLINE;
+ break;
+ case 7:
+ term.c.attr.mode |= ATTR_REVERSE;
+ break;
+ case 22:
+ term.c.attr.mode &= ~ATTR_BOLD;
+ break;
+ case 23: /* leave standout (highlight) mode TODO: make it italic */
+ term.c.attr.mode &= ~ATTR_REVERSE;
+ break;
+ case 24:
+ term.c.attr.mode &= ~ATTR_UNDERLINE;
+ break;
+ case 27:
+ term.c.attr.mode &= ~ATTR_REVERSE;
+ break;
+ case 38:
+ if(i + 2 < l && attr[i + 1] == 5) {
+ i += 2;
+ if(BETWEEN(attr[i], 0, 255))
+ term.c.attr.fg = attr[i];
+ else
+ fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
+ }
+ else
+ fprintf(stderr, "erresc(38): gfx attr %d unknown\n", attr[i]);
+ break;
+ case 39:
+ term.c.attr.fg = DefaultFG;
+ break;
+ case 48:
+ if(i + 2 < l && attr[i + 1] == 5) {
+ i += 2;
+ if(BETWEEN(attr[i], 0, 255))
+ term.c.attr.bg = attr[i];
+ else
+ fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
+ }
+ else
+ fprintf(stderr, "erresc(48): gfx attr %d unknown\n", attr[i]);
+ 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.fg = 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;
+}
+
+#define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
+
+void
+tsetmode(bool priv, bool set, int *args, int narg) {
+ int *lim, mode;
+
+ for (lim = args + narg; args < lim; ++args) {
+ if(priv) {
+ switch(*args) {
+ case 1:
+ MODBIT(term.mode, set, MODE_APPKEYPAD);
+ break;
+ case 5: /* DECSCNM -- Reverve video */
+ mode = term.mode;
+ MODBIT(term.mode,set, MODE_REVERSE);
+ if (mode != term.mode)
+ draw();
+ break;
+ case 7:
+ MODBIT(term.mode, set, MODE_WRAP);
+ break;
+ case 20:
+ MODBIT(term.mode, set, MODE_CRLF);
+ break;
+ case 12: /* att610 -- Start blinking cursor (IGNORED) */
+ break;
+ case 25:
+ MODBIT(term.c.state, !set, CURSOR_HIDE);
+ break;
+ case 1000: /* 1000,1002: enable xterm mouse report */
+ MODBIT(term.mode, set, MODE_MOUSEBTN);
+ break;
+ case 1002:
+ MODBIT(term.mode, set, MODE_MOUSEMOTION);
+ break;
+ case 1049: /* = 1047 and 1048 */
+ case 47:
+ case 1047:
+ if(IS_SET(MODE_ALTSCREEN))
+ tclearregion(0, 0, term.col-1, term.row-1);
+ if ((set && !IS_SET(MODE_ALTSCREEN)) ||
+ (!set && IS_SET(MODE_ALTSCREEN))) {
+ tswapscreen();
+ }
+ if (*args != 1049)
+ break;
+ /* pass through */
+ case 1048:
+ tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
+ break;
+ default:
+ fprintf(stderr,
+ "erresc: unknown private set/reset mode %d\n",
+ *args);
+ break;
+ }
+ } else {
+ switch(*args) {
+ case 4:
+ MODBIT(term.mode, set, MODE_INSERT);
+ break;
+ default:
+ fprintf(stderr,
+ "erresc: unknown set/reset mode %d\n",
+ *args);
+ break;
+ }
+ }
+ }
+}
+#undef MODBIT
+
+
+void
+csihandle(void) {
+ switch(csiescseq.mode) {
+ 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 */
+ case 'e':
+ DEFAULT(csiescseq.arg[0], 1);
+ tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
+ break;
+ case 'B': /* CUD -- Cursor <n> Down */
+ DEFAULT(csiescseq.arg[0], 1);
+ tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
+ break;
+ case 'C': /* CUF -- Cursor <n> Forward */
+ case 'a':
+ 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 '`': /* XXX: HPA -- same? */
+ DEFAULT(csiescseq.arg[0], 1);
+ tmoveto(csiescseq.arg[0]-1, term.c.y);
+ break;
+ case 'H': /* CUP -- Move to <row> <col> */
+ case 'f': /* XXX: HVP -- same? */
+ DEFAULT(csiescseq.arg[0], 1);
+ DEFAULT(csiescseq.arg[1], 1);
+ tmoveto(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
+ break;
+ case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
+ DEFAULT(csiescseq.arg[0], 1);
+ while (csiescseq.arg[0]--)
+ tputtab(1);
+ break;
+ case 'J': /* ED -- Clear screen */
+ sel.bx = -1;
+ 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], 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);
+ while (csiescseq.arg[0]--)
+ tputtab(0);
+ break;
+ case 'd': /* VPA -- Move to <row> */
+ DEFAULT(csiescseq.arg[0], 1);
+ tmoveto(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 '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);
+ tmoveto(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;
+ }
+}
+
+void
+csidump(void) {
+ int i;
+ printf("ESC[");
+ for(i = 0; i < csiescseq.len; i++) {
+ uint c = csiescseq.buf[i] & 0xff;
+ if(isprint(c)) putchar(c);
+ else if(c == '\n') printf("(\\n)");
+ else if(c == '\r') printf("(\\r)");
+ else if(c == 0x1b) printf("(\\e)");
+ else printf("(%02x)", c);
+ }
+ putchar('\n');
+}
+
+void
+csireset(void) {
+ memset(&csiescseq, 0, sizeof(csiescseq));
+}
+
+void
+strhandle(void) {
+ char *p;
+
+ /*
+ * TODO: make this being useful in case of color palette change.
+ */
+ strparse();
+
+ p = strescseq.buf;
+
+ switch(strescseq.type) {
+ case ']': /* OSC -- Operating System Command */
+ switch(p[0]) {
+ case '0':
+ case '1':
+ case '2':
+ /*
+ * TODO: Handle special chars in string, like umlauts.
+ */
+ if(p[1] == ';') {
+ XStoreName(xw.dpy, xw.win, strescseq.buf+2);
+ }
+ break;
+ case ';':
+ XStoreName(xw.dpy, xw.win, strescseq.buf+1);
+ break;
+ case '4': /* TODO: Set color (arg0) to "rgb:%hexr/$hexg/$hexb" (arg1) */
+ break;
+ default:
+ fprintf(stderr, "erresc: unknown str ");
+ strdump();
+ break;
+ }
+ break;
+ case 'P': /* DSC -- Device Control String */
+ case '_': /* APC -- Application Program Command */
+ case '^': /* PM -- Privacy Message */
+ default:
+ fprintf(stderr, "erresc: unknown str ");
+ strdump();
+ /* die(""); */
+ break;
+ }
+}
+
+void
+strparse(void) {
+ /*
+ * TODO: Implement parsing like for CSI when required.
+ * Format: ESC type cmd ';' arg0 [';' argn] ESC \
+ */
+ return;
+}
+
+void
+strdump(void) {
+ int i;
+ printf("ESC%c", strescseq.type);
+ for(i = 0; i < strescseq.len; i++) {
+ uint c = strescseq.buf[i] & 0xff;
+ if(isprint(c)) putchar(c);
+ else if(c == '\n') printf("(\\n)");
+ else if(c == '\r') printf("(\\r)");
+ else if(c == 0x1b) printf("(\\e)");
+ else printf("(%02x)", c);
+ }
+ printf("ESC\\\n");
+}
+
+void
+strreset(void) {
+ memset(&strescseq, 0, sizeof(strescseq));
+}
+
+void
+tputtab(bool forward) {
+ unsigned x = term.c.x;
+
+ if (forward) {
+ if (x == term.col)
+ return;
+ for (++x; x < term.col && !term.tabs[x]; ++x)
+ /* nothing */ ;
+ } else {
+ if (x == 0)
+ return;
+ for (--x; x > 0 && !term.tabs[x]; --x)
+ /* nothing */ ;
+ }
+ tmoveto(x, term.c.y);
+}
+
+void
+tputc(char *c) {
+ char ascii = *c;
+
+ if (fileio)
+ putc(ascii, fileio);
+ if(term.esc & ESC_START) {
+ if(term.esc & ESC_CSI) {
+ csiescseq.buf[csiescseq.len++] = ascii;
+ if(BETWEEN(ascii, 0x40, 0x7E) || csiescseq.len >= ESC_BUF_SIZ) {
+ term.esc = 0;
+ csiparse(), csihandle();
+ }
+ } else if(term.esc & ESC_STR) {
+ switch(ascii) {
+ case '\033':
+ term.esc = ESC_START | ESC_STR_END;
+ break;
+ case '\a': /* backwards compatibility to xterm */
+ term.esc = 0;
+ strhandle();
+ break;
+ default:
+ strescseq.buf[strescseq.len++] = ascii;
+ if (strescseq.len+1 >= STR_BUF_SIZ) {
+ term.esc = 0;
+ strhandle();
+ }
+ }
+ } else if(term.esc & ESC_STR_END) {
+ term.esc = 0;
+ if(ascii == '\\')
+ strhandle();
+ } else if(term.esc & ESC_ALTCHARSET) {
+ switch(ascii) {
+ 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:
+ fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
+ }
+ term.esc = 0;
+ } else {
+ switch(ascii) {
+ case '[':
+ term.esc |= ESC_CSI;
+ break;
+ case 'P': /* DCS -- Device Control String */
+ case '_': /* APC -- Application Program Command */
+ case '^': /* PM -- Privacy Message */
+ case ']': /* OSC -- Operating System Command */
+ strreset();
+ strescseq.type = ascii;
+ term.esc |= ESC_STR;
+ break;
+ case '(':
+ term.esc |= ESC_ALTCHARSET;
+ break;
+ case 'D': /* IND -- Linefeed */
+ if(term.c.y == term.bot)
+ tscrollup(term.top, 1);
+ else
+ tmoveto(term.c.x, term.c.y+1);
+ term.esc = 0;
+ break;
+ case 'E': /* NEL -- Next line */
+ tnewline(1); /* always go to first col */
+ term.esc = 0;
+ break;
+ case 'H': /* HTS -- Horizontal tab stop */
+ term.tabs[term.c.x] = 1;
+ term.esc = 0;
+ 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);
+ term.esc = 0;
+ break;
+ case 'c': /* RIS -- Reset to inital state */
+ treset();
+ term.esc = 0;
+ break;
+ case '=': /* DECPAM -- Application keypad */
+ term.mode |= MODE_APPKEYPAD;
+ term.esc = 0;
+ break;
+ case '>': /* DECPNM -- Normal keypad */
+ term.mode &= ~MODE_APPKEYPAD;
+ term.esc = 0;
+ break;
+ case '7': /* DECSC -- Save Cursor */
+ tcursor(CURSOR_SAVE);
+ term.esc = 0;
+ break;
+ case '8': /* DECRC -- Restore Cursor */
+ tcursor(CURSOR_LOAD);
+ term.esc = 0;
+ break;
+ case '\\': /* ST -- Stop */
+ term.esc = 0;
+ break;
+ default:
+ fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
+ (uchar) ascii, isprint(ascii)?ascii:'.');
+ term.esc = 0;
+ }
+ }
+ } else {
+ if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
+ sel.bx = -1;
+ switch(ascii) {
+ case '\t':
+ tputtab(1);
+ break;
+ case '\b':
+ tmoveto(term.c.x-1, term.c.y);
+ break;
+ case '\r':
+ tmoveto(0, term.c.y);
+ break;
+ case '\f':
+ case '\v':
+ case '\n':
+ /* go to first col if the mode is set */
+ tnewline(IS_SET(MODE_CRLF));
+ break;
+ case '\a':
+ if(!(xw.state & WIN_FOCUSED))
+ xseturgency(1);
+ break;
+ case '\033':
+ csireset();
+ term.esc = ESC_START;
+ break;
+ default:
+ if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
+ tnewline(1); /* always go to first col */
+ tsetchar(c);
+ if(term.c.x+1 < term.col)
+ tmoveto(term.c.x+1, term.c.y);
+ else
+ term.c.state |= CURSOR_WRAPNEXT;
+ }
+ }
+}
+
+int
+tresize(int col, int row) {
+ int i, x;
+ int minrow = MIN(row, term.row);
+ int mincol = MIN(col, term.col);
+ int slide = term.c.y - row + 1;
+
+ if(col < 1 || row < 1)
+ return 0;
+
+ /* free unneeded rows */
+ i = 0;
+ if(slide > 0) {
+ /* 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 < slide; i++) {
+ free(term.line[i]);
+ free(term.alt[i]);
+ }
+ memmove(term.line, term.line + slide, row * sizeof(Line));
+ memmove(term.alt, term.alt + slide, row * sizeof(Line));
+ }
+ for(i += row; i < term.row; i++) {
+ free(term.line[i]);
+ free(term.alt[i]);
+ }
+
+ /* resize to new height */
+ term.line = realloc(term.line, row * sizeof(Line));
+ term.alt = realloc(term.alt, row * sizeof(Line));
+ term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
+ term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
+
+ /* resize each row to new width, zero-pad if needed */
+ for(i = 0; i < minrow; i++) {
+ term.dirty[i] = 1;
+ term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
+ term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
+ for(x = mincol; x < col; x++) {
+ term.line[i][x].state = 0;
+ term.alt[i][x].state = 0;
+ }
+ }
+
+ /* allocate any new rows */
+ for(/* i == minrow */; i < row; i++) {
+ term.dirty[i] = 1;
+ term.line[i] = calloc(col, sizeof(Glyph));
+ term.alt [i] = calloc(col, sizeof(Glyph));
+ }
+ if (col > term.col) {
+ bool *bp = term.tabs + term.col;
+
+ memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
+ while (--bp > term.tabs && !*bp)
+ /* nothing */ ;
+ for (bp += TAB; bp < term.tabs + col; bp += TAB)
+ *bp = 1;
+ }
+ /* update terminal size */
+ term.col = col, term.row = row;
+ /* make use of the LIMIT in tmoveto */
+ tmoveto(term.c.x, term.c.y);
+ /* reset scrolling region */
+ tsetscroll(0, row-1);
+
+ return (slide > 0);
+}
+
+void
+xresize(int col, int row) {
+ xw.w = MAX(1, 2*BORDER + col * xw.cw);
+ xw.h = MAX(1, 2*BORDER + row * xw.ch);
+}
+
+void
+xloadcols(void) {
+ int i, r, g, b;
+ XColor color;
+ ulong white = WhitePixel(xw.dpy, xw.scr);
+
+ /* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
+ for(i = 0; i < LEN(colorname); i++) {
+ if(!colorname[i])
+ continue;
+ if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
+ dc.col[i] = white;
+ fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
+ } else
+ dc.col[i] = color.pixel;
+ }
+
+ /* load colors [16-255] ; same colors as xterm */
+ for(i = 16, r = 0; r < 6; r++)
+ for(g = 0; g < 6; g++)
+ for(b = 0; b < 6; b++) {
+ color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
+ color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
+ color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
+ if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
+ dc.col[i] = white;
+ fprintf(stderr, "Could not allocate color %d\n", i);
+ } else
+ dc.col[i] = color.pixel;
+ i++;
+ }
+
+ for(r = 0; r < 24; r++, i++) {
+ color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
+ if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
+ dc.col[i] = white;
+ fprintf(stderr, "Could not allocate color %d\n", i);
+ } else
+ dc.col[i] = color.pixel;
+ }
+}
+
+void
+xclear(int x1, int y1, int x2, int y2) {
+ XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
+ XFillRectangle(xw.dpy, xw.buf, dc.gc,
+ BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
+ (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
+}
+
+void
+xhints(void) {
+ XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
+ XWMHints wm = {.flags = InputHint, .input = 1};
+ XSizeHints size = {
+ .flags = PSize | PResizeInc | PBaseSize,
+ .height = xw.h,
+ .width = xw.w,
+ .height_inc = xw.ch,
+ .width_inc = xw.cw,
+ .base_height = 2*BORDER,
+ .base_width = 2*BORDER,
+ };
+ XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
+}
+
+XFontSet
+xinitfont(char *fontstr) {
+ XFontSet set;
+ char *def, **missing;
+ int n;
+
+ missing = NULL;
+ set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
+ if(missing) {
+ while(n--)
+ fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
+ XFreeStringList(missing);
+ }
+ return set;
+}
+
+void
+xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
+ XFontStruct **xfonts;
+ char **font_names;
+ int i, n;
+
+ *ascent = *descent = *lbearing = *rbearing = 0;
+ n = XFontsOfFontSet(set, &xfonts, &font_names);
+ for(i = 0; i < n; i++) {
+ *ascent = MAX(*ascent, (*xfonts)->ascent);
+ *descent = MAX(*descent, (*xfonts)->descent);
+ *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
+ *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
+ xfonts++;
+ }
+}
+
+void
+initfonts(char *fontstr, char *bfontstr) {
+ if((dc.font.set = xinitfont(fontstr)) == NULL ||
+ (dc.bfont.set = xinitfont(bfontstr)) == NULL)
+ die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
+ xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
+ &dc.font.lbearing, &dc.font.rbearing);
+ xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
+ &dc.bfont.lbearing, &dc.bfont.rbearing);
+}
+
+void
+xinit(void) {
+ XSetWindowAttributes attrs;
+ Cursor cursor;
+ Window parent;
+
+ if(!(xw.dpy = XOpenDisplay(NULL)))
+ die("Can't open display\n");
+ xw.scr = XDefaultScreen(xw.dpy);
+
+ /* font */
+ initfonts(FONT, BOLDFONT);
+
+ /* XXX: Assuming same size for bold font */
+ xw.cw = dc.font.rbearing - dc.font.lbearing;
+ xw.ch = dc.font.ascent + dc.font.descent;
+
+ /* colors */
+ xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
+ xloadcols();
+
+ /* window - default size */
+ xw.h = 2*BORDER + term.row * xw.ch;
+ xw.w = 2*BORDER + term.col * xw.cw;
+
+ attrs.background_pixel = dc.col[DefaultBG];
+ attrs.border_pixel = dc.col[DefaultBG];
+ attrs.bit_gravity = NorthWestGravity;
+ attrs.event_mask = FocusChangeMask | KeyPressMask
+ | ExposureMask | VisibilityChangeMask | StructureNotifyMask
+ | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
+ | EnterWindowMask | LeaveWindowMask;
+ attrs.colormap = xw.cmap;
+
+ parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
+ xw.win = XCreateWindow(xw.dpy, parent, 0, 0,
+ xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
+ XDefaultVisual(xw.dpy, xw.scr),
+ CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
+ | CWColormap,
+ &attrs);
+ xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
+
+
+ /* input methods */
+ xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
+ xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
+ | XIMStatusNothing, XNClientWindow, xw.win,
+ XNFocusWindow, xw.win, NULL);
+ /* gc */
+ dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
+
+ /* white cursor, black outline */
+ cursor = XCreateFontCursor(xw.dpy, XC_xterm);
+ XDefineCursor(xw.dpy, xw.win, cursor);
+ XRecolorCursor(xw.dpy, cursor,
+ &(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
+ &(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
+
+ xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
+
+ XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
+ XMapWindow(xw.dpy, xw.win);
+ xhints();
+ XSync(xw.dpy, 0);
+}
+
+void
+xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
+ int fg = base.fg, bg = base.bg, temp;
+ int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
+ XFontSet fontset = dc.font.set;
+ int i;
+
+ /* only switch default fg/bg if term is in RV mode */
+ if(IS_SET(MODE_REVERSE)) {
+ if(fg == DefaultFG)
+ fg = DefaultBG;
+ if(bg == DefaultBG)
+ bg = DefaultFG;
+ }
+
+ if(base.mode & ATTR_REVERSE)
+ temp = fg, fg = bg, bg = temp;
+
+ if(base.mode & ATTR_BOLD) {
+ fg += 8;
+ fontset = dc.bfont.set;
+ }
+
+ XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
+ XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
+
+ if(base.mode & ATTR_GFX) {
+ for(i = 0; i < bytelen; i++) {
+ char c = gfx[(uint)s[i] % 256];
+ if(c)
+ s[i] = c;
+ else if(s[i] > 0x5f)
+ s[i] -= 0x5f;
+ }
+ }
+
+ XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
+
+ if(base.mode & ATTR_UNDERLINE)
+ XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
+}
+
+/* copy buffer pixmap to screen pixmap */
+void
+xcopy() {
+ XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
+ XdbeSwapBuffers(xw.dpy, swpinfo, 1);
+
+}
+
+void
+xdrawcursor(void) {
+ static int oldx = 0;
+ static int oldy = 0;
+ int sl;
+ 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)
+ memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
+
+ /* remove the old cursor */
+ if(term.line[oldy][oldx].state & GLYPH_SET) {
+ sl = utf8size(term.line[oldy][oldx].c);
+ xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
+ } else
+ xclear(oldx, oldy, oldx, oldy);
+
+ xcopy(oldx, oldy, 1, 1);
+
+ /* draw the new one */
+ if(!(term.c.state & CURSOR_HIDE)) {
+ if(!(xw.state & WIN_FOCUSED))
+ g.bg = DefaultUCS;
+
+ if(IS_SET(MODE_REVERSE))
+ g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
+
+ sl = utf8size(g.c);
+ xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
+ oldx = term.c.x, oldy = term.c.y;
+ }
+
+ xcopy(term.c.x, term.c.y, 1, 1);
+}
+
+void
+draw() {
+ drawregion(0, 0, term.col, term.row);
+ xcopy();
+ gettimeofday(&xw.lastdraw, NULL);
+}
+
+void
+drawregion(int x1, int y1, int x2, int y2) {
+ int ic, ib, x, y, ox, sl;
+ Glyph base, new;
+ char buf[DRAW_BUF_SIZ];
+
+ if(!(xw.state & WIN_VISIBLE))
+ return;
+
+ for(y = y1; y < y2; y++) {
+ if(!term.dirty[y])
+ continue;
+ xclear(0, y, term.col, y);
+ term.dirty[y] = 0;
+ base = term.line[y][0];
+ ic = ib = ox = 0;
+ for(x = x1; x < x2; x++) {
+ new = term.line[y][x];
+ if(sel.bx != -1 && *(new.c) && selected(x, y))
+ new.mode ^= ATTR_REVERSE;
+ if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
+ ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
+ xdraws(buf, base, ox, y, ic, ib);
+ ic = ib = 0;
+ }
+ if(new.state & GLYPH_SET) {
+ if(ib == 0) {
+ ox = x;
+ base = new;
+ }
+ sl = utf8size(new.c);
+ memcpy(buf+ib, new.c, sl);
+ ib += sl;
+ ++ic;
+ }
+ }
+ if(ib > 0)
+ xdraws(buf, base, ox, y, ic, ib);
+ }
+ xdrawcursor();
+}
+
+void
+expose(XEvent *ev) {
+ XExposeEvent *e = &ev->xexpose;
+ if(xw.state & WIN_REDRAW) {
+ if(!e->count)
+ xw.state &= ~WIN_REDRAW;
+ }
+ xcopy();
+}
+
+void
+visibility(XEvent *ev) {
+ XVisibilityEvent *e = &ev->xvisibility;
+ if(e->state == VisibilityFullyObscured)
+ xw.state &= ~WIN_VISIBLE;
+ else if(!(xw.state & WIN_VISIBLE))
+ /* need a full redraw for next Expose, not just a buf copy */
+ xw.state |= WIN_VISIBLE | WIN_REDRAW;
+}
+
+void
+unmap(XEvent *ev) {
+ xw.state &= ~WIN_VISIBLE;
+}
+
+void
+xseturgency(int add) {
+ XWMHints *h = XGetWMHints(xw.dpy, xw.win);
+ h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
+ XSetWMHints(xw.dpy, xw.win, h);
+ XFree(h);
+}
+
+void
+focus(XEvent *ev) {
+ if(ev->type == FocusIn) {
+ xw.state |= WIN_FOCUSED;
+ xseturgency(0);
+ } else
+ xw.state &= ~WIN_FOCUSED;
+ draw();
+}
+
+char*
+kmap(KeySym k, uint state) {
+ int i;
+ state &= ~Mod2Mask;
+ for(i = 0; i < LEN(key); i++) {
+ uint mask = key[i].mask;
+ if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
+ 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;
+ Status status;
+
+ meta = e->state & Mod1Mask;
+ shift = e->state & ShiftMask;
+ len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
+
+ /* 1. custom keys from config.h */
+ if((customkey = kmap(ksym, e->state)))
+ ttywrite(customkey, strlen(customkey));
+ /* 2. hardcoded (overrides X lookup) */
+ else
+ switch(ksym) {
+ case XK_Up:
+ case XK_Down:
+ case XK_Left:
+ case XK_Right:
+ /* XXX: shift up/down doesn't work */
+ sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
+ ttywrite(buf, 3);
+ break;
+ case XK_Insert:
+ if(shift)
+ selpaste();
+ break;
+ case XK_Return:
+ if(IS_SET(MODE_CRLF))
+ ttywrite("\r\n", 2);
+ else
+ ttywrite("\r", 1);
+ break;
+ /* 3. X lookup */
+ default:
+ if(len > 0) {
+ if(meta && len == 1)
+ ttywrite("\033", 1);
+ ttywrite(buf, len);
+ }
+ break;
+ }
+}
+
+void
+cmessage(XEvent *e) {
+ /* See xembed specs
+ http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
+ if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
+ if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
+ xw.state |= WIN_FOCUSED;
+ xseturgency(0);
+ } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
+ xw.state &= ~WIN_FOCUSED;
+ }
+ draw();
+ }
+}
+
+void
+resize(XEvent *e) {
+ int col, row;
+
+ if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
+ return;
+
+ xw.w = e->xconfigure.width;
+ xw.h = e->xconfigure.height;
+ col = (xw.w - 2*BORDER) / xw.cw;
+ row = (xw.h - 2*BORDER) / xw.ch;
+ if(col == term.col && row == term.row)
+ return;
+ if(tresize(col, row))
+ draw();
+ ttyresize(col, row);
+ xresize(col, row);
+}
+
+bool
+last_draw_too_old(void) {
+ struct timeval now;
+ gettimeofday(&now, NULL);
+ return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
+}
+
+void
+run(void) {
+ XEvent ev;
+ fd_set rfd;
+ int xfd = XConnectionNumber(xw.dpy);
+ struct timeval timeout = {0};
+ bool stuff_to_print = 0;
+
+ for(;;) {
+ FD_ZERO(&rfd);
+ FD_SET(cmdfd, &rfd);
+ FD_SET(xfd, &rfd);
+ timeout.tv_sec = 0;
+ timeout.tv_usec = SELECT_TIMEOUT;
+ if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
+ if(errno == EINTR)
+ continue;
+ die("select failed: %s\n", SERRNO);
+ }
+ if(FD_ISSET(cmdfd, &rfd)) {
+ ttyread();
+ stuff_to_print = 1;
+ }
+
+ if(stuff_to_print && last_draw_too_old()) {
+ stuff_to_print = 0;
+ draw();
+ }
+
+ while(XPending(xw.dpy)) {
+ XNextEvent(xw.dpy, &ev);
+ if(XFilterEvent(&ev, xw.win))
+ continue;
+ if(handler[ev.type])
+ (handler[ev.type])(&ev);
+ }
+ }
+}
+
+int
+main(int argc, char *argv[]) {
+ int i;
+
+ for(i = 1; i < argc; i++) {
+ switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
+ case 't':
+ if(++i < argc) opt_title = argv[i];
+ break;
+ case 'c':
+ if(++i < argc) opt_class = argv[i];
+ break;
+ case 'w':
+ if(++i < argc) opt_embed = argv[i];
+ break;
+ case 'f':
+ if (++i < argc) opt_io = argv[i];
+ break;
+ case 'e':
+ /* eat every remaining arguments */
+ if(++i < argc) opt_cmd = &argv[i];
+ goto run;
+ case 'v':
+ default:
+ die(USAGE);
+ }
+ }
+
+ run:
+ setlocale(LC_CTYPE, "");
+ tnew(80, 24);
+ ttynew();
+ xinit();
+ selinit();
+ run();