+static DC dc;
+static XWindow xw;
+static Term term;
+static CSIEscape csiescseq;
+static STREscape strescseq;
+static int cmdfd;
+static pid_t pid;
+static Selection sel;
+static int iofd = 1;
+static char **opt_cmd = NULL;
+static char *opt_io = NULL;
+static char *opt_title = NULL;
+static char *opt_embed = NULL;
+static char *opt_class = NULL;
+static char *opt_font = NULL;
+static char *opt_line = NULL;
+static int oldbutton = 3; /* button event on startup: 3 = release */
+
+static char *usedfont = NULL;
+static double usedfontsize = 0;
+static double defaultfontsize = 0;
+
+static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
+static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
+static Rune utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
+static Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
+
+/* Font Ring Cache */
+enum {
+ FRC_NORMAL,
+ FRC_ITALIC,
+ FRC_BOLD,
+ FRC_ITALICBOLD
+};
+
+typedef struct {
+ XftFont *font;
+ int flags;
+ Rune unicodep;
+} Fontcache;
+
+/* Fontcache is an array now. A new font will be appended to the array. */
+static Fontcache frc[16];
+static int frclen = 0;
+
+ssize_t
+xwrite(int fd, const char *s, size_t len)
+{
+ size_t aux = len, r;
+
+ while (len > 0) {
+ r = write(fd, s, len);
+ if (r < 0)
+ return r;
+ len -= r;
+ s += r;
+ }
+
+ return aux;
+}
+
+void *
+xmalloc(size_t len)
+{
+ void *p = malloc(len);
+
+ if (!p)
+ die("Out of memory\n");
+
+ return p;
+}
+
+void *
+xrealloc(void *p, size_t len)
+{
+ if ((p = realloc(p, len)) == NULL)
+ die("Out of memory\n");
+
+ return p;
+}
+
+char *
+xstrdup(char *s)
+{
+ if ((s = strdup(s)) == NULL)
+ die("Out of memory\n");
+
+ return s;
+}
+
+size_t
+utf8decode(char *c, Rune *u, size_t clen)
+{
+ size_t i, j, len, type;
+ Rune udecoded;
+
+ *u = UTF_INVALID;
+ if (!clen)
+ return 0;
+ udecoded = utf8decodebyte(c[0], &len);
+ if (!BETWEEN(len, 1, UTF_SIZ))
+ return 1;
+ for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
+ udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
+ if (type != 0)
+ return j;
+ }
+ if (j < len)
+ return 0;
+ *u = udecoded;
+ utf8validate(u, len);
+
+ return len;
+}
+
+Rune
+utf8decodebyte(char c, size_t *i)
+{
+ for (*i = 0; *i < LEN(utfmask); ++(*i))
+ if (((uchar)c & utfmask[*i]) == utfbyte[*i])
+ return (uchar)c & ~utfmask[*i];
+
+ return 0;
+}
+
+size_t
+utf8encode(Rune u, char *c)
+{
+ size_t len, i;
+
+ len = utf8validate(&u, 0);
+ if (len > UTF_SIZ)
+ return 0;
+
+ for (i = len - 1; i != 0; --i) {
+ c[i] = utf8encodebyte(u, 0);
+ u >>= 6;
+ }
+ c[0] = utf8encodebyte(u, len);
+
+ return len;
+}
+
+char
+utf8encodebyte(Rune u, size_t i)
+{
+ return utfbyte[i] | (u & ~utfmask[i]);
+}
+
+char *
+utf8strchr(char *s, Rune u)
+{
+ Rune r;
+ size_t i, j, len;
+
+ len = strlen(s);
+ for (i = 0, j = 0; i < len; i += j) {
+ if (!(j = utf8decode(&s[i], &r, len - i)))
+ break;
+ if (r == u)
+ return &(s[i]);
+ }
+
+ return NULL;
+}
+
+size_t
+utf8validate(Rune *u, size_t i)
+{
+ if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
+ *u = UTF_INVALID;
+ for (i = 1; *u > utfmax[i]; ++i)
+ ;
+
+ return i;
+}
+
+void
+selinit(void)
+{
+ memset(&sel.tclick1, 0, sizeof(sel.tclick1));
+ memset(&sel.tclick2, 0, sizeof(sel.tclick2));
+ sel.mode = SEL_IDLE;
+ sel.ob.x = -1;
+ sel.primary = NULL;
+ sel.clipboard = NULL;
+ sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
+ if (sel.xtarget == None)
+ sel.xtarget = XA_STRING;
+}
+
+int
+x2col(int x)
+{
+ x -= borderpx;
+ x /= xw.cw;
+
+ return LIMIT(x, 0, term.col-1);
+}
+
+int
+y2row(int y)
+{
+ y -= borderpx;
+ y /= xw.ch;
+
+ return LIMIT(y, 0, term.row-1);
+}
+
+int
+tlinelen(int y)
+{
+ int i = term.col;
+
+ if (term.line[y][i - 1].mode & ATTR_WRAP)
+ return i;
+
+ while (i > 0 && term.line[y][i - 1].u == ' ')
+ --i;
+
+ return i;
+}
+
+void
+selnormalize(void)
+{
+ int i;
+
+ if (sel.type == SEL_REGULAR && sel.ob.y != sel.oe.y) {
+ sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
+ sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
+ } else {
+ sel.nb.x = MIN(sel.ob.x, sel.oe.x);
+ sel.ne.x = MAX(sel.ob.x, sel.oe.x);
+ }
+ sel.nb.y = MIN(sel.ob.y, sel.oe.y);
+ sel.ne.y = MAX(sel.ob.y, sel.oe.y);
+
+ selsnap(&sel.nb.x, &sel.nb.y, -1);
+ selsnap(&sel.ne.x, &sel.ne.y, +1);
+
+ /* expand selection over line breaks */
+ if (sel.type == SEL_RECTANGULAR)
+ return;
+ i = tlinelen(sel.nb.y);
+ if (i < sel.nb.x)
+ sel.nb.x = i;
+ if (tlinelen(sel.ne.y) <= sel.ne.x)
+ sel.ne.x = term.col - 1;
+}
+
+int
+selected(int x, int y)
+{
+ if (sel.mode == SEL_EMPTY)
+ return 0;
+
+ if (sel.type == SEL_RECTANGULAR)
+ return BETWEEN(y, sel.nb.y, sel.ne.y)
+ && BETWEEN(x, sel.nb.x, sel.ne.x);
+
+ return BETWEEN(y, sel.nb.y, sel.ne.y)
+ && (y != sel.nb.y || x >= sel.nb.x)
+ && (y != sel.ne.y || x <= sel.ne.x);
+}
+
+void
+selsnap(int *x, int *y, int direction)
+{
+ int newx, newy, xt, yt;
+ int delim, prevdelim;
+ Glyph *gp, *prevgp;
+
+ switch (sel.snap) {
+ case SNAP_WORD:
+ /*
+ * Snap around if the word wraps around at the end or
+ * beginning of a line.
+ */
+ prevgp = &term.line[*y][*x];
+ prevdelim = ISDELIM(prevgp->u);
+ for (;;) {
+ newx = *x + direction;
+ newy = *y;
+ if (!BETWEEN(newx, 0, term.col - 1)) {
+ newy += direction;
+ newx = (newx + term.col) % term.col;
+ if (!BETWEEN(newy, 0, term.row - 1))
+ break;
+
+ if (direction > 0)
+ yt = *y, xt = *x;
+ else
+ yt = newy, xt = newx;
+ if (!(term.line[yt][xt].mode & ATTR_WRAP))
+ break;
+ }
+
+ if (newx >= tlinelen(newy))
+ break;
+
+ gp = &term.line[newy][newx];
+ delim = ISDELIM(gp->u);
+ if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
+ || (delim && gp->u != prevgp->u)))
+ break;
+
+ *x = newx;
+ *y = newy;
+ prevgp = gp;
+ prevdelim = delim;
+ }
+ break;
+ case SNAP_LINE:
+ /*
+ * Snap around if the the previous line or the current one
+ * has set ATTR_WRAP at its end. Then the whole next or
+ * previous line will be selected.
+ */
+ *x = (direction < 0) ? 0 : term.col - 1;
+ if (direction < 0) {
+ for (; *y > 0; *y += direction) {
+ if (!(term.line[*y-1][term.col-1].mode
+ & ATTR_WRAP)) {
+ break;
+ }
+ }
+ } else if (direction > 0) {
+ for (; *y < term.row-1; *y += direction) {
+ if (!(term.line[*y][term.col-1].mode
+ & ATTR_WRAP)) {
+ break;
+ }
+ }
+ }
+ break;
+ }
+}
+
+void
+getbuttoninfo(XEvent *e)
+{
+ int type;
+ uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
+
+ sel.alt = IS_SET(MODE_ALTSCREEN);
+
+ sel.oe.x = x2col(e->xbutton.x);
+ sel.oe.y = y2row(e->xbutton.y);
+ selnormalize();
+
+ sel.type = SEL_REGULAR;
+ for (type = 1; type < LEN(selmasks); ++type) {
+ if (match(selmasks[type], state)) {
+ sel.type = type;
+ break;
+ }
+ }
+}
+
+void
+mousereport(XEvent *e)
+{
+ int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
+ button = e->xbutton.button, state = e->xbutton.state,
+ len;
+ char buf[40];
+ static int ox, oy;
+
+ /* from urxvt */
+ if (e->xbutton.type == MotionNotify) {
+ if (x == ox && y == oy)
+ return;
+ if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
+ return;
+ /* MOUSE_MOTION: no reporting if no button is pressed */
+ if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
+ return;
+
+ button = oldbutton + 32;
+ ox = x;
+ oy = y;
+ } else {
+ if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
+ button = 3;
+ } else {
+ button -= Button1;
+ if (button >= 3)
+ button += 64 - 3;
+ }
+ if (e->xbutton.type == ButtonPress) {
+ oldbutton = button;
+ ox = x;
+ oy = y;
+ } else if (e->xbutton.type == ButtonRelease) {
+ oldbutton = 3;
+ /* MODE_MOUSEX10: no button release reporting */
+ if (IS_SET(MODE_MOUSEX10))
+ return;
+ if (button == 64 || button == 65)
+ return;
+ }
+ }
+
+ if (!IS_SET(MODE_MOUSEX10)) {
+ button += ((state & ShiftMask ) ? 4 : 0)
+ + ((state & Mod4Mask ) ? 8 : 0)
+ + ((state & ControlMask) ? 16 : 0);
+ }
+
+ if (IS_SET(MODE_MOUSESGR)) {
+ len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
+ button, x+1, y+1,
+ e->xbutton.type == ButtonRelease ? 'm' : 'M');
+ } else if (x < 223 && y < 223) {
+ len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
+ 32+button, 32+x+1, 32+y+1);
+ } else {
+ return;
+ }
+
+ ttywrite(buf, len);
+}
+
+void
+bpress(XEvent *e)
+{
+ struct timespec now;
+ Mousekey *mk;
+
+ if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
+ mousereport(e);
+ return;
+ }
+
+ for (mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
+ if (e->xbutton.button == mk->b
+ && match(mk->mask, e->xbutton.state)) {
+ ttysend(mk->s, strlen(mk->s));
+ return;
+ }
+ }
+
+ if (e->xbutton.button == Button1) {
+ clock_gettime(CLOCK_MONOTONIC, &now);
+
+ /* Clear previous selection, logically and visually. */
+ selclear(NULL);
+ sel.mode = SEL_EMPTY;
+ sel.type = SEL_REGULAR;
+ sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
+ sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
+
+ /*
+ * If the user clicks below predefined timeouts specific
+ * snapping behaviour is exposed.
+ */
+ if (TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
+ sel.snap = SNAP_LINE;
+ } else if (TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
+ sel.snap = SNAP_WORD;
+ } else {
+ sel.snap = 0;
+ }
+ selnormalize();
+
+ if (sel.snap != 0)
+ sel.mode = SEL_READY;
+ tsetdirt(sel.nb.y, sel.ne.y);
+ sel.tclick2 = sel.tclick1;
+ sel.tclick1 = now;
+ }
+}
+
+char *
+getsel(void)
+{
+ char *str, *ptr;
+ int y, bufsize, lastx, linelen;
+ Glyph *gp, *last;
+
+ if (sel.ob.x == -1)
+ return NULL;
+
+ bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
+ ptr = str = xmalloc(bufsize);
+
+ /* append every set & selected glyph to the selection */
+ for (y = sel.nb.y; y <= sel.ne.y; y++) {
+ linelen = tlinelen(y);
+
+ if (sel.type == SEL_RECTANGULAR) {
+ gp = &term.line[y][sel.nb.x];
+ lastx = sel.ne.x;
+ } else {
+ gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
+ lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
+ }
+ last = &term.line[y][MIN(lastx, linelen-1)];
+ while (last >= gp && last->u == ' ')
+ --last;
+
+ for ( ; gp <= last; ++gp) {
+ if (gp->mode & ATTR_WDUMMY)
+ continue;
+
+ ptr += utf8encode(gp->u, ptr);
+ }
+
+ /*
+ * Copy and pasting of line endings is inconsistent
+ * in the inconsistent terminal and GUI world.
+ * The best solution seems like to produce '\n' when
+ * something is copied from st and convert '\n' to
+ * '\r', when something to be pasted is received by
+ * st.
+ * FIXME: Fix the computer world.
+ */
+ if ((y < sel.ne.y || lastx >= linelen) && !(last->mode & ATTR_WRAP))
+ *ptr++ = '\n';
+ }
+ *ptr = 0;
+ return str;
+}
+
+void
+selcopy(Time t)
+{
+ xsetsel(getsel(), t);
+}
+
+void
+propnotify(XEvent *e)
+{
+ XPropertyEvent *xpev;
+ Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
+
+ xpev = &e->xproperty;
+ if (xpev->state == PropertyNewValue &&
+ (xpev->atom == XA_PRIMARY ||
+ xpev->atom == clipboard)) {
+ selnotify(e);
+ }
+}
+
+void
+selnotify(XEvent *e)
+{
+ ulong nitems, ofs, rem;
+ int format;
+ uchar *data, *last, *repl;
+ Atom type, incratom, property;
+
+ incratom = XInternAtom(xw.dpy, "INCR", 0);
+
+ ofs = 0;
+ if (e->type == SelectionNotify) {
+ property = e->xselection.property;
+ } else if(e->type == PropertyNotify) {
+ property = e->xproperty.atom;
+ } else {
+ return;
+ }
+ if (property == None)
+ return;
+
+ do {
+ if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
+ BUFSIZ/4, False, AnyPropertyType,
+ &type, &format, &nitems, &rem,
+ &data)) {
+ fprintf(stderr, "Clipboard allocation failed\n");
+ return;
+ }
+
+ if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
+ /*
+ * If there is some PropertyNotify with no data, then
+ * this is the signal of the selection owner that all
+ * data has been transferred. We won't need to receive
+ * PropertyNotify events anymore.
+ */
+ MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
+ XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
+ &xw.attrs);
+ }
+
+ if (type == incratom) {
+ /*
+ * Activate the PropertyNotify events so we receive
+ * when the selection owner does send us the next
+ * chunk of data.
+ */
+ MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
+ XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
+ &xw.attrs);
+
+ /*
+ * Deleting the property is the transfer start signal.
+ */
+ XDeleteProperty(xw.dpy, xw.win, (int)property);
+ continue;
+ }
+
+ /*
+ * As seen in getsel:
+ * Line endings are inconsistent in the terminal and GUI world
+ * copy and pasting. When receiving some selection data,
+ * replace all '\n' with '\r'.
+ * FIXME: Fix the computer world.
+ */
+ repl = data;
+ last = data + nitems * format / 8;
+ while ((repl = memchr(repl, '\n', last - repl))) {
+ *repl++ = '\r';
+ }
+
+ if (IS_SET(MODE_BRCKTPASTE))
+ ttywrite("\033[200~", 6);
+ ttysend((char *)data, nitems * format / 8);
+ if (IS_SET(MODE_BRCKTPASTE))
+ ttywrite("\033[201~", 6);
+ XFree(data);
+ /* number of 32-bit chunks returned */
+ ofs += nitems * format / 32;
+ } while (rem > 0);
+
+ /*
+ * Deleting the property again tells the selection owner to send the
+ * next data chunk in the property.
+ */
+ if (e->type == PropertyNotify)
+ XDeleteProperty(xw.dpy, xw.win, (int)property);
+}
+
+void
+selpaste(const Arg *dummy)
+{
+ XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
+ xw.win, CurrentTime);
+}
+
+void
+clipcopy(const Arg *dummy)
+{
+ Atom clipboard;
+
+ if (sel.clipboard != NULL)
+ free(sel.clipboard);
+
+ if (sel.primary != NULL) {
+ sel.clipboard = xstrdup(sel.primary);
+ clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
+ XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
+ }
+}
+
+void
+clippaste(const Arg *dummy)
+{
+ Atom clipboard;
+
+ clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
+ XConvertSelection(xw.dpy, clipboard, sel.xtarget, clipboard,
+ xw.win, CurrentTime);
+}
+
+void
+selclear(XEvent *e)
+{
+ if (sel.ob.x == -1)
+ return;
+ sel.mode = SEL_IDLE;
+ sel.ob.x = -1;
+ tsetdirt(sel.nb.y, sel.ne.y);
+}
+
+void
+selrequest(XEvent *e)
+{
+ XSelectionRequestEvent *xsre;
+ XSelectionEvent xev;
+ Atom xa_targets, string, clipboard;
+ char *seltext;
+
+ xsre = (XSelectionRequestEvent *) e;
+ xev.type = SelectionNotify;
+ xev.requestor = xsre->requestor;
+ xev.selection = xsre->selection;
+ xev.target = xsre->target;
+ xev.time = xsre->time;
+ if (xsre->property == None)
+ xsre->property = xsre->target;
+
+ /* reject */
+ xev.property = None;
+
+ xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
+ if (xsre->target == xa_targets) {
+ /* respond with the supported type */
+ 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 || xsre->target == XA_STRING) {
+ /*
+ * xith XA_STRING non ascii characters may be incorrect in the
+ * requestor. It is not our problem, use utf8.
+ */
+ clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
+ if (xsre->selection == XA_PRIMARY) {
+ seltext = sel.primary;
+ } else if (xsre->selection == clipboard) {
+ seltext = sel.clipboard;
+ } else {
+ fprintf(stderr,
+ "Unhandled clipboard selection 0x%lx\n",
+ xsre->selection);
+ return;
+ }
+ if (seltext != NULL) {
+ XChangeProperty(xsre->display, xsre->requestor,
+ xsre->property, xsre->target,
+ 8, PropModeReplace,
+ (uchar *)seltext, strlen(seltext));
+ xev.property = xsre->property;
+ }
+ }
+
+ /* all done, send a notification to the listener */
+ if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
+ fprintf(stderr, "Error sending SelectionNotify event\n");
+}
+
+void
+xsetsel(char *str, Time t)
+{
+ free(sel.primary);
+ sel.primary = str;
+
+ XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
+ if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
+ selclear(0);
+}
+
+void
+brelease(XEvent *e)
+{
+ if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
+ mousereport(e);
+ return;
+ }
+
+ if (e->xbutton.button == Button2) {
+ selpaste(NULL);
+ } else if (e->xbutton.button == Button1) {
+ if (sel.mode == SEL_READY) {
+ getbuttoninfo(e);
+ selcopy(e->xbutton.time);
+ } else
+ selclear(NULL);
+ sel.mode = SEL_IDLE;
+ tsetdirt(sel.nb.y, sel.ne.y);
+ }
+}
+
+void
+bmotion(XEvent *e)
+{
+ int oldey, oldex, oldsby, oldsey;
+
+ if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
+ mousereport(e);
+ return;
+ }
+
+ if (!sel.mode)
+ return;
+
+ sel.mode = SEL_READY;
+ oldey = sel.oe.y;
+ oldex = sel.oe.x;
+ oldsby = sel.nb.y;
+ oldsey = sel.ne.y;
+ getbuttoninfo(e);
+
+ if (oldey != sel.oe.y || oldex != sel.oe.x)
+ tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
+}
+
+void
+die(const char *errstr, ...)
+{
+ va_list ap;
+
+ va_start(ap, errstr);
+ vfprintf(stderr, errstr, ap);
+ va_end(ap);
+ exit(1);
+}
+
+void
+execsh(void)
+{
+ char **args, *sh, *prog;
+ const struct passwd *pw;
+ char buf[sizeof(long) * 8 + 1];
+
+ errno = 0;
+ if ((pw = getpwuid(getuid())) == NULL) {
+ if (errno)
+ die("getpwuid:%s\n", strerror(errno));
+ else
+ die("who are you?\n");
+ }
+
+ if ((sh = getenv("SHELL")) == NULL)
+ sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
+
+ if (opt_cmd)
+ prog = opt_cmd[0];
+ else if (utmp)
+ prog = utmp;
+ else
+ prog = sh;
+ args = (opt_cmd) ? opt_cmd : (char *[]) {prog, NULL};
+
+ snprintf(buf, sizeof(buf), "%lu", xw.win);
+
+ unsetenv("COLUMNS");
+ unsetenv("LINES");
+ unsetenv("TERMCAP");
+ setenv("LOGNAME", pw->pw_name, 1);
+ setenv("USER", pw->pw_name, 1);
+ setenv("SHELL", sh, 1);
+ setenv("HOME", pw->pw_dir, 1);
+ setenv("TERM", termname, 1);
+ setenv("WINDOWID", buf, 1);
+
+ signal(SIGCHLD, SIG_DFL);
+ signal(SIGHUP, SIG_DFL);
+ signal(SIGINT, SIG_DFL);
+ signal(SIGQUIT, SIG_DFL);
+ signal(SIGTERM, SIG_DFL);
+ signal(SIGALRM, SIG_DFL);
+
+ execvp(prog, args);
+ _exit(1);
+}
+
+void
+sigchld(int a)
+{
+ int stat;
+ pid_t p;
+
+ if ((p = waitpid(pid, &stat, WNOHANG)) < 0)
+ die("Waiting for pid %hd failed: %s\n", pid, strerror(errno));
+
+ if (pid != p)
+ return;
+
+ if (!WIFEXITED(stat) || WEXITSTATUS(stat))
+ die("child finished with error '%d'\n", stat);
+ exit(0);
+}
+
+
+void
+stty(void)
+{
+ char cmd[_POSIX_ARG_MAX], **p, *q, *s;
+ size_t n, siz;
+
+ if ((n = strlen(stty_args)) > sizeof(cmd)-1)
+ die("incorrect stty parameters\n");
+ memcpy(cmd, stty_args, n);
+ q = cmd + n;
+ siz = sizeof(cmd) - n;
+ for (p = opt_cmd; p && (s = *p); ++p) {
+ if ((n = strlen(s)) > siz-1)
+ die("stty parameter length too long\n");
+ *q++ = ' ';
+ q = memcpy(q, s, n);
+ q += n;
+ siz-= n + 1;
+ }
+ *q = '\0';
+ if (system(cmd) != 0)
+ perror("Couldn't call stty");
+}
+
+void
+ttynew(void)
+{
+ int m, s;
+ struct winsize w = {term.row, term.col, 0, 0};
+
+ if (opt_io) {
+ term.mode |= MODE_PRINT;
+ iofd = (!strcmp(opt_io, "-")) ?
+ 1 : open(opt_io, O_WRONLY | O_CREAT, 0666);
+ if (iofd < 0) {
+ fprintf(stderr, "Error opening %s:%s\n",
+ opt_io, strerror(errno));
+ }
+ }
+
+ if (opt_line) {
+ if ((cmdfd = open(opt_line, O_RDWR)) < 0)
+ die("open line failed: %s\n", strerror(errno));
+ close(0);
+ dup(cmdfd);
+ stty();
+ return;
+ }
+
+ /* seems to work fine on linux, openbsd and freebsd */
+ if (openpty(&m, &s, NULL, NULL, &w) < 0)
+ die("openpty failed: %s\n", strerror(errno));
+
+ switch (pid = fork()) {
+ case -1:
+ die("fork failed\n");
+ break;
+ case 0:
+ close(iofd);
+ setsid(); /* create a new process group */
+ dup2(s, 0);
+ dup2(s, 1);
+ dup2(s, 2);
+ if (ioctl(s, TIOCSCTTY, NULL) < 0)
+ die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
+ close(s);
+ close(m);
+ execsh();
+ break;
+ default:
+ close(s);
+ cmdfd = m;
+ signal(SIGCHLD, sigchld);
+ break;
+ }
+}
+
+void
+ttyread(void)
+{
+ static char buf[BUFSIZ];
+ static int buflen = 0;
+ char *ptr;
+ int charsize; /* size of utf8 char in bytes */
+ Rune unicodep;
+ 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", strerror(errno));
+
+ /* process every complete utf8 char */
+ buflen += ret;
+ ptr = buf;
+ while ((charsize = utf8decode(ptr, &unicodep, buflen))) {
+ tputc(unicodep);
+ 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)
+{
+ fd_set wfd;
+ struct timespec tv;
+ ssize_t r;
+
+ /*
+ * Remember that we are using a pty, which might be a modem line.
+ * Writing too much will clog the line. That's why we are doing this
+ * dance.
+ * FIXME: Migrate the world to Plan 9.
+ */
+ while (n > 0) {
+ FD_ZERO(&wfd);
+ FD_SET(cmdfd, &wfd);
+ tv.tv_sec = 0;
+ tv.tv_nsec = 0;
+
+ /* Check if we can write. */
+ if (pselect(cmdfd+1, NULL, &wfd, NULL, &tv, NULL) < 0) {
+ if (errno == EINTR)
+ continue;
+ die("select failed: %s\n", strerror(errno));
+ }
+ if(!FD_ISSET(cmdfd, &wfd)) {
+ /* No, then free some buffer space. */
+ ttyread();
+ } else {
+ /*
+ * Only write 256 bytes at maximum. This seems to be a
+ * reasonable value for a serial line. Bigger values
+ * might clog the I/O.
+ */
+ r = write(cmdfd, s, (n < 256)? n : 256);
+ if (r < 0) {
+ die("write error on tty: %s\n",
+ strerror(errno));
+ }
+ if (r < n) {
+ /*
+ * We weren't able to write out everything.
+ * This means the buffer is getting full
+ * again. Empty it.
+ */
+ ttyread();
+ n -= r;
+ s += r;
+ } else {
+ /* All bytes have been written. */
+ break;
+ }
+ }
+ }
+}
+
+void
+ttysend(char *s, size_t n)
+{
+ int len;
+ Rune u;
+
+ ttywrite(s, n);
+ if (IS_SET(MODE_ECHO))
+ while ((len = utf8decode(s, &u, n)) > 0) {
+ techo(u);
+ n -= len;
+ s += len;
+ }
+}
+
+void
+ttyresize(void)
+{
+ struct winsize w;
+
+ w.ws_row = term.row;
+ w.ws_col = term.col;
+ w.ws_xpixel = xw.tw;
+ w.ws_ypixel = xw.th;
+ if (ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
+ fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
+}
+
+int
+tattrset(int attr)
+{
+ int i, j;
+
+ for (i = 0; i < term.row-1; i++) {
+ for (j = 0; j < term.col-1; j++) {
+ if (term.line[i][j].mode & attr)
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+void
+tsetdirt(int top, int bot)
+{
+ int i;
+
+ LIMIT(top, 0, term.row-1);
+ LIMIT(bot, 0, term.row-1);
+
+ for (i = top; i <= bot; i++)
+ term.dirty[i] = 1;
+}
+
+void
+tsetdirtattr(int attr)
+{
+ int i, j;
+
+ for (i = 0; i < term.row-1; i++) {
+ for (j = 0; j < term.col-1; j++) {
+ if (term.line[i][j].mode & attr) {
+ tsetdirt(i, i);
+ break;
+ }
+ }
+ }
+}
+
+void
+tfulldirt(void)
+{
+ tsetdirt(0, term.row-1);
+}
+
+void
+tcursor(int mode)
+{
+ static TCursor c[2];
+ int alt = IS_SET(MODE_ALTSCREEN);
+
+ if (mode == CURSOR_SAVE) {
+ c[alt] = term.c;
+ } else if (mode == CURSOR_LOAD) {
+ term.c = c[alt];
+ tmoveto(c[alt].x, c[alt].y);
+ }
+}
+
+void
+treset(void)
+{
+ uint i;
+
+ term.c = (TCursor){{
+ .mode = ATTR_NULL,
+ .fg = defaultfg,
+ .bg = defaultbg
+ }, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
+
+ memset(term.tabs, 0, term.col * sizeof(*term.tabs));
+ for (i = tabspaces; i < term.col; i += tabspaces)
+ term.tabs[i] = 1;
+ term.top = 0;
+ term.bot = term.row - 1;
+ term.mode = MODE_WRAP;
+ memset(term.trantbl, CS_USA, sizeof(term.trantbl));
+ term.charset = 0;
+
+ for (i = 0; i < 2; i++) {
+ tmoveto(0, 0);
+ tcursor(CURSOR_SAVE);
+ tclearregion(0, 0, term.col-1, term.row-1);
+ tswapscreen();
+ }
+}
+
+void
+tnew(int col, int row)
+{
+ term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
+ tresize(col, row);
+ term.numlock = 1;
+
+ treset();
+}
+
+void
+tswapscreen(void)
+{
+ Line *tmp = term.line;
+
+ term.line = term.alt;
+ term.alt = tmp;
+ term.mode ^= MODE_ALTSCREEN;
+ tfulldirt();
+}
+
+void
+tscrolldown(int orig, int n)
+{
+ int i;
+ Line temp;
+
+ LIMIT(n, 0, term.bot-orig+1);
+
+ tsetdirt(orig, term.bot-n);
+ tclearregion(0, term.bot-n+1, term.col-1, term.bot);
+
+ for (i = term.bot; i >= orig+n; i--) {
+ temp = term.line[i];
+ term.line[i] = term.line[i-n];
+ term.line[i-n] = temp;
+ }
+
+ selscroll(orig, n);
+}
+
+void
+tscrollup(int orig, int n)
+{
+ int i;
+ Line temp;
+
+ LIMIT(n, 0, term.bot-orig+1);
+
+ tclearregion(0, orig, term.col-1, orig+n-1);
+ tsetdirt(orig+n, term.bot);
+
+ for (i = orig; i <= term.bot-n; i++) {
+ temp = term.line[i];
+ term.line[i] = term.line[i+n];
+ term.line[i+n] = temp;
+ }
+
+ selscroll(orig, -n);
+}
+
+void
+selscroll(int orig, int n)
+{
+ if (sel.ob.x == -1)
+ return;
+
+ if (BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
+ if ((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
+ selclear(NULL);
+ return;
+ }
+ if (sel.type == SEL_RECTANGULAR) {
+ if (sel.ob.y < term.top)
+ sel.ob.y = term.top;
+ if (sel.oe.y > term.bot)
+ sel.oe.y = term.bot;
+ } else {
+ if (sel.ob.y < term.top) {
+ sel.ob.y = term.top;
+ sel.ob.x = 0;
+ }
+ if (sel.oe.y > term.bot) {
+ sel.oe.y = term.bot;
+ sel.oe.x = term.col;
+ }
+ }
+ selnormalize();
+ }
+}
+
+void
+tnewline(int first_col)
+{
+ int y = term.c.y;
+
+ if (y == term.bot) {
+ tscrollup(term.top, 1);
+ } else {
+ y++;
+ }
+ tmoveto(first_col ? 0 : term.c.x, y);
+}
+
+void
+csiparse(void)
+{
+ char *p = csiescseq.buf, *np;
+ long int v;
+
+ csiescseq.narg = 0;
+ if (*p == '?') {
+ csiescseq.priv = 1;
+ p++;
+ }
+
+ csiescseq.buf[csiescseq.len] = '\0';
+ while (p < csiescseq.buf+csiescseq.len) {
+ np = NULL;
+ v = strtol(p, &np, 10);
+ if (np == p)
+ v = 0;
+ if (v == LONG_MAX || v == LONG_MIN)
+ v = -1;
+ csiescseq.arg[csiescseq.narg++] = v;
+ p = np;
+ if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
+ break;
+ p++;
+ }
+ csiescseq.mode[0] = *p++;
+ csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
+}
+
+/* for absolute user moves, when decom is set */
+void
+tmoveato(int x, int y)
+{
+ tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
+}
+
+void
+tmoveto(int x, int y)
+{
+ int miny, maxy;
+
+ if (term.c.state & CURSOR_ORIGIN) {
+ miny = term.top;
+ maxy = term.bot;
+ } else {
+ miny = 0;
+ maxy = term.row - 1;
+ }
+ term.c.state &= ~CURSOR_WRAPNEXT;
+ term.c.x = LIMIT(x, 0, term.col-1);
+ term.c.y = LIMIT(y, miny, maxy);
+}
+
+void
+tsetchar(Rune u, Glyph *attr, int x, int y)
+{
+ static char *vt100_0[62] = { /* 0x41 - 0x7e */
+ "↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
+ 0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
+ 0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
+ 0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
+ "◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
+ "", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
+ "⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
+ "│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
+ };
+
+ /*
+ * The table is proudly stolen from rxvt.
+ */
+ if (term.trantbl[term.charset] == CS_GRAPHIC0 &&
+ BETWEEN(u, 0x41, 0x7e) && vt100_0[u - 0x41])
+ utf8decode(vt100_0[u - 0x41], &u, UTF_SIZ);
+
+ if (term.line[y][x].mode & ATTR_WIDE) {
+ if (x+1 < term.col) {
+ term.line[y][x+1].u = ' ';
+ term.line[y][x+1].mode &= ~ATTR_WDUMMY;
+ }
+ } else if (term.line[y][x].mode & ATTR_WDUMMY) {
+ term.line[y][x-1].u = ' ';
+ term.line[y][x-1].mode &= ~ATTR_WIDE;
+ }
+
+ term.dirty[y] = 1;
+ term.line[y][x] = *attr;
+ term.line[y][x].u = u;
+}
+
+void
+tclearregion(int x1, int y1, int x2, int y2)
+{
+ int x, y, temp;
+ Glyph *gp;
+
+ if (x1 > x2)
+ temp = x1, x1 = x2, x2 = temp;
+ if (y1 > y2)
+ temp = y1, y1 = y2, y2 = temp;
+
+ LIMIT(x1, 0, term.col-1);
+ LIMIT(x2, 0, term.col-1);
+ LIMIT(y1, 0, term.row-1);
+ LIMIT(y2, 0, term.row-1);
+
+ for (y = y1; y <= y2; y++) {
+ term.dirty[y] = 1;
+ for (x = x1; x <= x2; x++) {
+ gp = &term.line[y][x];
+ if (selected(x, y))
+ selclear(NULL);
+ gp->fg = term.c.attr.fg;
+ gp->bg = term.c.attr.bg;
+ gp->mode = 0;
+ gp->u = ' ';
+ }
+ }
+}
+
+void
+tdeletechar(int n)
+{
+ int dst, src, size;
+ Glyph *line;
+
+ LIMIT(n, 0, term.col - term.c.x);
+
+ dst = term.c.x;
+ src = term.c.x + n;
+ size = term.col - src;
+ line = term.line[term.c.y];
+
+ memmove(&line[dst], &line[src], size * sizeof(Glyph));
+ tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
+}
+
+void
+tinsertblank(int n)
+{
+ int dst, src, size;
+ Glyph *line;
+
+ LIMIT(n, 0, term.col - term.c.x);
+
+ dst = term.c.x + n;
+ src = term.c.x;
+ size = term.col - dst;
+ line = term.line[term.c.y];
+
+ memmove(&line[dst], &line[src], size * sizeof(Glyph));
+ tclearregion(src, term.c.y, dst - 1, term.c.y);
+}
+
+void
+tinsertblankline(int n)
+{
+ if (BETWEEN(term.c.y, term.top, term.bot))
+ tscrolldown(term.c.y, n);
+}
+
+void
+tdeleteline(int n)
+{
+ if (BETWEEN(term.c.y, term.top, term.bot))
+ tscrollup(term.c.y, n);
+}
+
+int32_t
+tdefcolor(int *attr, int *npar, int l)
+{
+ int32_t idx = -1;
+ uint r, g, b;
+
+ switch (attr[*npar + 1]) {
+ case 2: /* direct color in RGB space */
+ if (*npar + 4 >= l) {
+ fprintf(stderr,
+ "erresc(38): Incorrect number of parameters (%d)\n",
+ *npar);
+ break;
+ }
+ r = attr[*npar + 2];
+ g = attr[*npar + 3];
+ b = attr[*npar + 4];
+ *npar += 4;
+ if (!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
+ fprintf(stderr, "erresc: bad rgb color (%u,%u,%u)\n",
+ r, g, b);
+ else
+ idx = TRUECOLOR(r, g, b);
+ break;
+ case 5: /* indexed color */
+ if (*npar + 2 >= l) {
+ fprintf(stderr,
+ "erresc(38): Incorrect number of parameters (%d)\n",
+ *npar);
+ break;
+ }
+ *npar += 2;
+ if (!BETWEEN(attr[*npar], 0, 255))
+ fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
+ else
+ idx = attr[*npar];
+ break;
+ case 0: /* implemented defined (only foreground) */
+ case 1: /* transparent */
+ case 3: /* direct color in CMY space */
+ case 4: /* direct color in CMYK space */
+ default:
+ fprintf(stderr,
+ "erresc(38): gfx attr %d unknown\n", attr[*npar]);
+ break;
+ }
+
+ return idx;
+}
+
+void
+tsetattr(int *attr, int l)
+{
+ int i;
+ int32_t idx;
+
+ for (i = 0; i < l; i++) {
+ switch (attr[i]) {
+ case 0:
+ term.c.attr.mode &= ~(
+ ATTR_BOLD |
+ ATTR_FAINT |
+ ATTR_ITALIC |
+ ATTR_UNDERLINE |
+ ATTR_BLINK |
+ ATTR_REVERSE |
+ ATTR_INVISIBLE |
+ ATTR_STRUCK );
+ term.c.attr.fg = defaultfg;
+ term.c.attr.bg = defaultbg;
+ break;
+ case 1:
+ term.c.attr.mode |= ATTR_BOLD;
+ break;
+ case 2:
+ term.c.attr.mode |= ATTR_FAINT;
+ break;
+ case 3:
+ term.c.attr.mode |= ATTR_ITALIC;
+ break;
+ case 4:
+ term.c.attr.mode |= ATTR_UNDERLINE;
+ break;
+ case 5: /* slow blink */
+ /* FALLTHROUGH */
+ case 6: /* rapid blink */
+ term.c.attr.mode |= ATTR_BLINK;
+ break;
+ case 7:
+ term.c.attr.mode |= ATTR_REVERSE;
+ break;
+ case 8:
+ term.c.attr.mode |= ATTR_INVISIBLE;
+ break;
+ case 9:
+ term.c.attr.mode |= ATTR_STRUCK;
+ break;
+ case 22:
+ term.c.attr.mode &= ~(ATTR_BOLD | ATTR_FAINT);
+ break;
+ case 23:
+ term.c.attr.mode &= ~ATTR_ITALIC;
+ break;
+ case 24:
+ term.c.attr.mode &= ~ATTR_UNDERLINE;
+ break;
+ case 25:
+ term.c.attr.mode &= ~ATTR_BLINK;
+ break;
+ case 27:
+ term.c.attr.mode &= ~ATTR_REVERSE;
+ break;
+ case 28:
+ term.c.attr.mode &= ~ATTR_INVISIBLE;
+ break;
+ case 29:
+ term.c.attr.mode &= ~ATTR_STRUCK;
+ break;
+ case 38:
+ if ((idx = tdefcolor(attr, &i, l)) >= 0)
+ term.c.attr.fg = idx;
+ break;
+ case 39:
+ term.c.attr.fg = defaultfg;
+ break;
+ case 48:
+ if ((idx = tdefcolor(attr, &i, l)) >= 0)
+ term.c.attr.bg = idx;
+ break;
+ case 49:
+ term.c.attr.bg = defaultbg;
+ break;
+ default:
+ if (BETWEEN(attr[i], 30, 37)) {
+ term.c.attr.fg = attr[i] - 30;
+ } else if (BETWEEN(attr[i], 40, 47)) {
+ term.c.attr.bg = attr[i] - 40;
+ } else if (BETWEEN(attr[i], 90, 97)) {
+ term.c.attr.fg = attr[i] - 90 + 8;
+ } else if (BETWEEN(attr[i], 100, 107)) {
+ term.c.attr.bg = attr[i] - 100 + 8;
+ } else {
+ fprintf(stderr,
+ "erresc(default): gfx attr %d unknown\n",
+ attr[i]), csidump();
+ }
+ break;
+ }
+ }
+}
+
+void
+tsetscroll(int t, int b)
+{
+ int temp;
+
+ LIMIT(t, 0, term.row-1);
+ LIMIT(b, 0, term.row-1);
+ if (t > b) {
+ temp = t;
+ t = b;
+ b = temp;
+ }
+ term.top = t;
+ term.bot = b;
+}
+
+void
+tsetmode(int priv, int set, int *args, int narg)
+{
+ int *lim, mode;
+ int alt;
+
+ for (lim = args + narg; args < lim; ++args) {
+ if (priv) {
+ switch (*args) {
+ case 1: /* DECCKM -- Cursor key */
+ MODBIT(term.mode, set, MODE_APPCURSOR);
+ break;
+ case 5: /* DECSCNM -- Reverse video */
+ mode = term.mode;
+ MODBIT(term.mode, set, MODE_REVERSE);
+ if (mode != term.mode)
+ redraw();
+ break;
+ case 6: /* DECOM -- Origin */
+ MODBIT(term.c.state, set, CURSOR_ORIGIN);
+ tmoveato(0, 0);
+ break;
+ case 7: /* DECAWM -- Auto wrap */
+ MODBIT(term.mode, set, MODE_WRAP);
+ break;
+ case 0: /* Error (IGNORED) */
+ case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
+ case 3: /* DECCOLM -- Column (IGNORED) */
+ case 4: /* DECSCLM -- Scroll (IGNORED) */
+ case 8: /* DECARM -- Auto repeat (IGNORED) */
+ case 18: /* DECPFF -- Printer feed (IGNORED) */
+ case 19: /* DECPEX -- Printer extent (IGNORED) */
+ case 42: /* DECNRCM -- National characters (IGNORED) */
+ case 12: /* att610 -- Start blinking cursor (IGNORED) */
+ break;
+ case 25: /* DECTCEM -- Text Cursor Enable Mode */
+ MODBIT(term.mode, !set, MODE_HIDE);
+ break;
+ case 9: /* X10 mouse compatibility mode */
+ xsetpointermotion(0);
+ MODBIT(term.mode, 0, MODE_MOUSE);
+ MODBIT(term.mode, set, MODE_MOUSEX10);
+ break;
+ case 1000: /* 1000: report button press */
+ xsetpointermotion(0);
+ MODBIT(term.mode, 0, MODE_MOUSE);
+ MODBIT(term.mode, set, MODE_MOUSEBTN);
+ break;
+ case 1002: /* 1002: report motion on button press */
+ xsetpointermotion(0);
+ MODBIT(term.mode, 0, MODE_MOUSE);
+ MODBIT(term.mode, set, MODE_MOUSEMOTION);
+ break;
+ case 1003: /* 1003: enable all mouse motions */
+ xsetpointermotion(set);
+ MODBIT(term.mode, 0, MODE_MOUSE);
+ MODBIT(term.mode, set, MODE_MOUSEMANY);
+ break;
+ case 1004: /* 1004: send focus events to tty */
+ MODBIT(term.mode, set, MODE_FOCUS);
+ break;
+ case 1006: /* 1006: extended reporting mode */
+ MODBIT(term.mode, set, MODE_MOUSESGR);
+ break;
+ case 1034:
+ MODBIT(term.mode, set, MODE_8BIT);
+ break;
+ case 1049: /* swap screen & set/restore cursor as xterm */
+ if (!allowaltscreen)
+ break;
+ tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
+ /* FALLTHROUGH */
+ case 47: /* swap screen */
+ case 1047:
+ if (!allowaltscreen)
+ break;
+ alt = IS_SET(MODE_ALTSCREEN);
+ if (alt) {
+ tclearregion(0, 0, term.col-1,
+ term.row-1);
+ }
+ if (set ^ alt) /* set is always 1 or 0 */
+ tswapscreen();
+ if (*args != 1049)
+ break;
+ /* FALLTHROUGH */
+ case 1048:
+ tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
+ break;
+ case 2004: /* 2004: bracketed paste mode */
+ MODBIT(term.mode, set, MODE_BRCKTPASTE);
+ break;
+ /* Not implemented mouse modes. See comments there. */
+ case 1001: /* mouse highlight mode; can hang the
+ terminal by design when implemented. */
+ case 1005: /* UTF-8 mouse mode; will confuse
+ applications not supporting UTF-8
+ and luit. */
+ case 1015: /* urxvt mangled mouse mode; incompatible
+ and can be mistaken for other control
+ codes. */
+ default:
+ fprintf(stderr,
+ "erresc: unknown private set/reset mode %d\n",
+ *args);
+ break;
+ }
+ } else {
+ switch (*args) {
+ case 0: /* Error (IGNORED) */
+ break;
+ case 2: /* KAM -- keyboard action */
+ MODBIT(term.mode, set, MODE_KBDLOCK);
+ break;
+ case 4: /* IRM -- Insertion-replacement */
+ MODBIT(term.mode, set, MODE_INSERT);
+ break;
+ case 12: /* SRM -- Send/Receive */
+ MODBIT(term.mode, !set, MODE_ECHO);
+ break;
+ case 20: /* LNM -- Linefeed/new line */
+ MODBIT(term.mode, set, MODE_CRLF);
+ break;
+ default:
+ fprintf(stderr,
+ "erresc: unknown set/reset mode %d\n",
+ *args);
+ break;
+ }
+ }
+ }
+}
+
+void
+csihandle(void)
+{
+ char buf[40];
+ int len;
+
+ switch (csiescseq.mode[0]) {
+ default:
+ unknown:
+ fprintf(stderr, "erresc: unknown csi ");
+ csidump();
+ /* die(""); */
+ break;
+ case '@': /* ICH -- Insert <n> blank char */
+ DEFAULT(csiescseq.arg[0], 1);
+ tinsertblank(csiescseq.arg[0]);
+ break;
+ case 'A': /* CUU -- Cursor <n> Up */
+ DEFAULT(csiescseq.arg[0], 1);
+ tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
+ break;
+ case 'B': /* CUD -- Cursor <n> Down */
+ case 'e': /* VPR --Cursor <n> Down */
+ DEFAULT(csiescseq.arg[0], 1);
+ tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
+ break;
+ case 'i': /* MC -- Media Copy */
+ switch (csiescseq.arg[0]) {
+ case 0:
+ tdump();
+ break;
+ case 1:
+ tdumpline(term.c.y);
+ break;
+ case 2:
+ tdumpsel();
+ break;
+ case 4:
+ term.mode &= ~MODE_PRINT;
+ break;
+ case 5:
+ term.mode |= MODE_PRINT;
+ break;
+ }
+ break;
+ case 'c': /* DA -- Device Attributes */
+ if (csiescseq.arg[0] == 0)
+ ttywrite(vtiden, sizeof(vtiden) - 1);
+ break;
+ case 'C': /* CUF -- Cursor <n> Forward */
+ case 'a': /* HPR -- Cursor <n> Forward */
+ DEFAULT(csiescseq.arg[0], 1);
+ tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
+ break;
+ case 'D': /* CUB -- Cursor <n> Backward */
+ DEFAULT(csiescseq.arg[0], 1);
+ tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
+ break;
+ case 'E': /* CNL -- Cursor <n> Down and first col */
+ DEFAULT(csiescseq.arg[0], 1);
+ tmoveto(0, term.c.y+csiescseq.arg[0]);
+ break;
+ case 'F': /* CPL -- Cursor <n> Up and first col */
+ DEFAULT(csiescseq.arg[0], 1);
+ tmoveto(0, term.c.y-csiescseq.arg[0]);
+ break;
+ case 'g': /* TBC -- Tabulation clear */
+ switch (csiescseq.arg[0]) {
+ case 0: /* clear current tab stop */
+ term.tabs[term.c.x] = 0;
+ break;
+ case 3: /* clear all the tabs */
+ memset(term.tabs, 0, term.col * sizeof(*term.tabs));
+ break;
+ default:
+ goto unknown;
+ }
+ break;
+ case 'G': /* CHA -- Move to <col> */
+ case '`': /* HPA */
+ DEFAULT(csiescseq.arg[0], 1);
+ tmoveto(csiescseq.arg[0]-1, term.c.y);
+ break;
+ case 'H': /* CUP -- Move to <row> <col> */
+ case 'f': /* HVP */
+ DEFAULT(csiescseq.arg[0], 1);
+ DEFAULT(csiescseq.arg[1], 1);
+ tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
+ break;
+ case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
+ DEFAULT(csiescseq.arg[0], 1);
+ tputtab(csiescseq.arg[0]);
+ break;
+ case 'J': /* ED -- Clear screen */
+ selclear(NULL);
+ switch (csiescseq.arg[0]) {
+ case 0: /* below */
+ tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
+ if (term.c.y < term.row-1) {
+ tclearregion(0, term.c.y+1, term.col-1,
+ term.row-1);
+ }
+ break;
+ case 1: /* above */
+ if (term.c.y > 1)
+ tclearregion(0, 0, term.col-1, term.c.y-1);
+ tclearregion(0, term.c.y, term.c.x, term.c.y);
+ break;
+ case 2: /* all */
+ tclearregion(0, 0, term.col-1, term.row-1);
+ break;
+ default:
+ goto unknown;
+ }
+ break;
+ case 'K': /* EL -- Clear line */
+ switch (csiescseq.arg[0]) {
+ case 0: /* right */
+ tclearregion(term.c.x, term.c.y, term.col-1,
+ term.c.y);
+ break;
+ case 1: /* left */
+ tclearregion(0, term.c.y, term.c.x, term.c.y);
+ break;
+ case 2: /* all */
+ tclearregion(0, term.c.y, term.col-1, term.c.y);
+ break;
+ }
+ break;
+ case 'S': /* SU -- Scroll <n> line up */
+ DEFAULT(csiescseq.arg[0], 1);
+ tscrollup(term.top, csiescseq.arg[0]);
+ break;
+ case 'T': /* SD -- Scroll <n> line down */
+ DEFAULT(csiescseq.arg[0], 1);
+ tscrolldown(term.top, csiescseq.arg[0]);
+ break;
+ case 'L': /* IL -- Insert <n> blank lines */
+ DEFAULT(csiescseq.arg[0], 1);
+ tinsertblankline(csiescseq.arg[0]);
+ break;
+ case 'l': /* RM -- Reset Mode */
+ tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
+ break;
+ case 'M': /* DL -- Delete <n> lines */
+ DEFAULT(csiescseq.arg[0], 1);
+ tdeleteline(csiescseq.arg[0]);
+ break;
+ case 'X': /* ECH -- Erase <n> char */
+ DEFAULT(csiescseq.arg[0], 1);
+ tclearregion(term.c.x, term.c.y,
+ term.c.x + csiescseq.arg[0] - 1, term.c.y);
+ break;
+ case 'P': /* DCH -- Delete <n> char */
+ DEFAULT(csiescseq.arg[0], 1);
+ tdeletechar(csiescseq.arg[0]);
+ break;
+ case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
+ DEFAULT(csiescseq.arg[0], 1);
+ tputtab(-csiescseq.arg[0]);
+ break;
+ case 'd': /* VPA -- Move to <row> */
+ DEFAULT(csiescseq.arg[0], 1);
+ tmoveato(term.c.x, csiescseq.arg[0]-1);
+ break;
+ case 'h': /* SM -- Set terminal mode */
+ tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
+ break;
+ case 'm': /* SGR -- Terminal attribute (color) */
+ tsetattr(csiescseq.arg, csiescseq.narg);
+ break;
+ case 'n': /* DSR – Device Status Report (cursor position) */
+ if (csiescseq.arg[0] == 6) {
+ len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
+ term.c.y+1, term.c.x+1);
+ ttywrite(buf, len);
+ }
+ break;
+ case 'r': /* DECSTBM -- Set Scrolling Region */
+ if (csiescseq.priv) {
+ goto unknown;
+ } else {
+ DEFAULT(csiescseq.arg[0], 1);
+ DEFAULT(csiescseq.arg[1], term.row);
+ tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
+ tmoveato(0, 0);
+ }
+ break;
+ case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
+ tcursor(CURSOR_SAVE);
+ break;
+ case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
+ tcursor(CURSOR_LOAD);
+ break;
+ case ' ':
+ switch (csiescseq.mode[1]) {
+ case 'q': /* DECSCUSR -- Set Cursor Style */
+ DEFAULT(csiescseq.arg[0], 1);
+ if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
+ goto unknown;
+ }
+ xw.cursor = csiescseq.arg[0];
+ break;
+ default:
+ goto unknown;
+ }
+ break;
+ }
+}
+
+void
+csidump(void)
+{
+ int i;
+ uint c;
+
+ printf("ESC[");
+ for (i = 0; i < csiescseq.len; i++) {
+ 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 = NULL;
+ int j, narg, par;
+
+ term.esc &= ~(ESC_STR_END|ESC_STR);
+ strparse();
+ par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
+
+ switch (strescseq.type) {
+ case ']': /* OSC -- Operating System Command */
+ switch (par) {
+ case 0:
+ case 1:
+ case 2:
+ if (narg > 1)
+ xsettitle(strescseq.args[1]);
+ return;
+ case 4: /* color set */
+ if (narg < 3)
+ break;
+ p = strescseq.args[2];
+ /* FALLTHROUGH */
+ case 104: /* color reset, here p = NULL */
+ j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
+ if (xsetcolorname(j, p)) {
+ fprintf(stderr, "erresc: invalid color %s\n", p);
+ } else {
+ /*
+ * TODO if defaultbg color is changed, borders
+ * are dirty
+ */
+ redraw();
+ }
+ return;
+ }
+ break;
+ case 'k': /* old title set compatibility */
+ xsettitle(strescseq.args[0]);
+ return;
+ case 'P': /* DCS -- Device Control String */
+ case '_': /* APC -- Application Program Command */
+ case '^': /* PM -- Privacy Message */
+ return;
+ }
+
+ fprintf(stderr, "erresc: unknown str ");
+ strdump();
+}
+
+void
+strparse(void)
+{
+ int c;
+ char *p = strescseq.buf;
+
+ strescseq.narg = 0;
+ strescseq.buf[strescseq.len] = '\0';
+
+ if (*p == '\0')
+ return;
+
+ while (strescseq.narg < STR_ARG_SIZ) {
+ strescseq.args[strescseq.narg++] = p;
+ while ((c = *p) != ';' && c != '\0')
+ ++p;
+ if (c == '\0')
+ return;
+ *p++ = '\0';
+ }
+}
+
+void
+strdump(void)
+{
+ int i;
+ uint c;
+
+ printf("ESC%c", strescseq.type);
+ for (i = 0; i < strescseq.len; i++) {
+ c = strescseq.buf[i] & 0xff;
+ if (c == '\0') {
+ return;
+ } else 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
+tprinter(char *s, size_t len)
+{
+ if (iofd != -1 && xwrite(iofd, s, len) < 0) {
+ fprintf(stderr, "Error writing in %s:%s\n",
+ opt_io, strerror(errno));
+ close(iofd);
+ iofd = -1;
+ }
+}
+
+void
+toggleprinter(const Arg *arg)
+{
+ term.mode ^= MODE_PRINT;
+}
+
+void
+printscreen(const Arg *arg)
+{
+ tdump();
+}
+
+void
+printsel(const Arg *arg)
+{
+ tdumpsel();
+}
+
+void
+tdumpsel(void)
+{
+ char *ptr;
+
+ if ((ptr = getsel())) {
+ tprinter(ptr, strlen(ptr));
+ free(ptr);
+ }
+}
+
+void
+tdumpline(int n)
+{
+ char buf[UTF_SIZ];
+ Glyph *bp, *end;
+
+ bp = &term.line[n][0];
+ end = &bp[MIN(tlinelen(n), term.col) - 1];
+ if (bp != end || bp->u != ' ') {
+ for ( ;bp <= end; ++bp)
+ tprinter(buf, utf8encode(bp->u, buf));
+ }
+ tprinter("\n", 1);
+}
+
+void
+tdump(void)
+{
+ int i;
+
+ for (i = 0; i < term.row; ++i)
+ tdumpline(i);
+}
+
+void
+tputtab(int n)
+{
+ uint x = term.c.x;
+
+ if (n > 0) {
+ while (x < term.col && n--)
+ for (++x; x < term.col && !term.tabs[x]; ++x)
+ /* nothing */ ;
+ } else if (n < 0) {
+ while (x > 0 && n++)
+ for (--x; x > 0 && !term.tabs[x]; --x)
+ /* nothing */ ;
+ }
+ term.c.x = LIMIT(x, 0, term.col-1);
+}
+
+void
+techo(Rune u)
+{
+ if (ISCONTROL(u)) { /* control code */
+ if (u & 0x80) {
+ u &= 0x7f;
+ tputc('^');
+ tputc('[');
+ } else if (u != '\n' && u != '\r' && u != '\t') {
+ u ^= 0x40;
+ tputc('^');
+ }
+ }
+ tputc(u);
+}