+ break;
+ case 'E': /* NEL -- Next line */
+ tnewline(1); /* always go to first col */
+ break;
+ case 'H': /* HTS -- Horizontal tab stop */
+ term.tabs[term.c.x] = 1;
+ 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);
+ }
+ break;
+ case 'Z': /* DECID -- Identify Terminal */
+ ttywrite(vtiden, sizeof(vtiden) - 1);
+ break;
+ case 'c': /* RIS -- Reset to inital state */
+ treset();
+ xresettitle();
+ xloadcols();
+ break;
+ case '=': /* DECPAM -- Application keypad */
+ term.mode |= MODE_APPKEYPAD;
+ break;
+ case '>': /* DECPNM -- Normal keypad */
+ term.mode &= ~MODE_APPKEYPAD;
+ break;
+ case '7': /* DECSC -- Save Cursor */
+ tcursor(CURSOR_SAVE);
+ break;
+ case '8': /* DECRC -- Restore Cursor */
+ tcursor(CURSOR_LOAD);
+ break;
+ case '\\': /* ST -- String Terminator */
+ if(term.esc & ESC_STR_END)
+ strhandle();
+ break;
+ default:
+ fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
+ (uchar) ascii, isprint(ascii)? ascii:'.');
+ break;
+ }
+ return 1;
+}
+
+void
+tputc(long u) {
+ char c[UTF_SIZ];
+ bool control;
+ int width, len;
+ Glyph *gp;
+
+ len = utf8encode(u, c);
+ if((width = wcwidth(u)) == -1) {
+ memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
+ width = 1;
+ }
+
+ if(IS_SET(MODE_PRINT))
+ tprinter(c, len);
+ control = ISCONTROL(u);
+
+ /*
+ * STR sequence must be checked before anything else
+ * because it uses all following characters until it
+ * receives a ESC, a SUB, a ST or any other C1 control
+ * character.
+ */
+ if(term.esc & ESC_STR) {
+ if(u == '\a' || u == 030 || u == 032 || u == 033 ||
+ ISCONTROLC1(u)) {
+ term.esc &= ~(ESC_START|ESC_STR);
+ term.esc |= ESC_STR_END;
+ } else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
+ memmove(&strescseq.buf[strescseq.len], c, len);
+ strescseq.len += len;
+ return;
+ } else {
+ /*
+ * Here is a bug in terminals. If the user never sends
+ * some code to stop the str or esc command, then st
+ * will stop responding. But this is better than
+ * silently failing with unknown characters. At least
+ * then users will report back.
+ *
+ * In the case users ever get fixed, here is the code:
+ */
+ /*
+ * term.esc = 0;
+ * strhandle();
+ */
+ return;
+ }
+ }
+
+ /*
+ * Actions of control codes must be performed as soon they arrive
+ * because they can be embedded inside a control sequence, and
+ * they must not cause conflicts with sequences.
+ */
+ if(control) {
+ tcontrolcode(u);
+ /*
+ * control codes are not shown ever
+ */
+ return;
+ } else if(term.esc & ESC_START) {
+ if(term.esc & ESC_CSI) {
+ csiescseq.buf[csiescseq.len++] = u;
+ if(BETWEEN(u, 0x40, 0x7E)
+ || csiescseq.len >= \
+ sizeof(csiescseq.buf)-1) {
+ term.esc = 0;
+ csiparse();
+ csihandle();
+ }
+ return;
+ } else if(term.esc & ESC_ALTCHARSET) {
+ tdeftran(u);
+ } else if(term.esc & ESC_TEST) {
+ tdectest(u);
+ } else {
+ if (!eschandle(u))
+ return;
+ /* sequence already finished */
+ }
+ term.esc = 0;
+ /*
+ * All characters which form part of a sequence are not
+ * printed
+ */
+ return;
+ }
+ if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
+ selclear(NULL);
+
+ gp = &term.line[term.c.y][term.c.x];
+ if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
+ gp->mode |= ATTR_WRAP;
+ tnewline(1);
+ gp = &term.line[term.c.y][term.c.x];
+ }
+
+ if(IS_SET(MODE_INSERT) && term.c.x+width < term.col)
+ memmove(gp+width, gp, (term.col - term.c.x - width) * sizeof(Glyph));
+
+ if(term.c.x+width > term.col) {
+ tnewline(1);
+ gp = &term.line[term.c.y][term.c.x];
+ }
+
+ tsetchar(u, &term.c.attr, term.c.x, term.c.y);
+
+ if(width == 2) {
+ gp->mode |= ATTR_WIDE;
+ if(term.c.x+1 < term.col) {
+ gp[1].u = '\0';
+ gp[1].mode = ATTR_WDUMMY;
+ }
+ }
+ if(term.c.x+width < term.col) {
+ tmoveto(term.c.x+width, term.c.y);
+ } else {
+ term.c.state |= CURSOR_WRAPNEXT;
+ }
+}
+
+void
+tresize(int col, int row) {
+ int i;
+ int minrow = MIN(row, term.row);
+ int mincol = MIN(col, term.col);
+ bool *bp;
+ TCursor c;
+
+ if(col < 1 || row < 1) {
+ fprintf(stderr,
+ "tresize: error resizing to %dx%d\n", col, row);
+ return;
+ }
+
+ /*
+ * 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 <= term.c.y - row; i++) {
+ free(term.line[i]);
+ free(term.alt[i]);
+ }
+ /* ensure that both src and dst are not NULL */
+ if (i > 0) {
+ memmove(term.line, term.line + i, row * sizeof(Line));
+ memmove(term.alt, term.alt + i, row * sizeof(Line));
+ }
+ for(i += row; i < term.row; i++) {
+ free(term.line[i]);
+ free(term.alt[i]);
+ }
+
+ /* resize to new height */
+ term.line = xrealloc(term.line, row * sizeof(Line));
+ term.alt = xrealloc(term.alt, row * sizeof(Line));
+ term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
+ term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
+
+ /* resize each row to new width, zero-pad if needed */
+ for(i = 0; i < minrow; i++) {
+ term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
+ term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
+ }
+
+ /* allocate any new rows */
+ for(/* i == minrow */; i < row; i++) {
+ term.line[i] = xmalloc(col * sizeof(Glyph));
+ term.alt[i] = xmalloc(col * sizeof(Glyph));
+ }
+ if(col > term.col) {
+ bp = term.tabs + term.col;
+
+ memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
+ while(--bp > term.tabs && !*bp)
+ /* nothing */ ;
+ for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
+ *bp = 1;
+ }
+ /* update terminal size */
+ term.col = col;
+ term.row = row;
+ /* reset scrolling region */
+ tsetscroll(0, row-1);
+ /* make use of the LIMIT in tmoveto */
+ tmoveto(term.c.x, term.c.y);
+ /* Clearing both screens (it makes dirty all lines) */
+ c = term.c;
+ for(i = 0; i < 2; i++) {
+ if(mincol < col && 0 < minrow) {
+ tclearregion(mincol, 0, col - 1, minrow - 1);
+ }
+ if(0 < col && minrow < row) {
+ tclearregion(0, minrow, col - 1, row - 1);
+ }
+ tswapscreen();
+ tcursor(CURSOR_LOAD);
+ }
+ term.c = c;
+}
+
+void
+xresize(int col, int row) {
+ xw.tw = MAX(1, col * xw.cw);
+ xw.th = MAX(1, row * xw.ch);
+
+ XFreePixmap(xw.dpy, xw.buf);
+ xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
+ DefaultDepth(xw.dpy, xw.scr));
+ XftDrawChange(xw.draw, xw.buf);
+ xclear(0, 0, xw.w, xw.h);
+}
+
+ushort
+sixd_to_16bit(int x) {
+ return x == 0 ? 0 : 0x3737 + 0x2828 * x;
+}
+
+bool
+xloadcolor(int i, const char *name, Color *ncolor) {
+ XRenderColor color = { .alpha = 0xffff };
+
+ if(!name) {
+ if(BETWEEN(i, 16, 255)) { /* 256 color */
+ if(i < 6*6*6+16) { /* same colors as xterm */
+ color.red = sixd_to_16bit( ((i-16)/36)%6 );
+ color.green = sixd_to_16bit( ((i-16)/6) %6 );
+ color.blue = sixd_to_16bit( ((i-16)/1) %6 );
+ } else { /* greyscale */
+ color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
+ color.green = color.blue = color.red;
+ }
+ return XftColorAllocValue(xw.dpy, xw.vis,
+ xw.cmap, &color, ncolor);
+ } else
+ name = colorname[i];
+ }
+ return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
+}
+
+void
+xloadcols(void) {
+ int i;
+ static bool loaded;
+ Color *cp;
+
+ if(loaded) {
+ for (cp = dc.col; cp < &dc.col[LEN(dc.col)]; ++cp)
+ XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
+ }
+
+ for(i = 0; i < LEN(dc.col); i++)
+ if(!xloadcolor(i, NULL, &dc.col[i])) {
+ if(colorname[i])
+ die("Could not allocate color '%s'\n", colorname[i]);
+ else
+ die("Could not allocate color %d\n", i);
+ }
+ loaded = true;
+}
+
+int
+xsetcolorname(int x, const char *name) {
+ Color ncolor;
+
+ if(!BETWEEN(x, 0, LEN(dc.col)))
+ return 1;
+
+
+ if(!xloadcolor(x, name, &ncolor))
+ return 1;
+
+ XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
+ dc.col[x] = ncolor;
+ return 0;
+}
+
+void
+xtermclear(int col1, int row1, int col2, int row2) {
+ XftDrawRect(xw.draw,
+ &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
+ borderpx + col1 * xw.cw,
+ borderpx + row1 * xw.ch,
+ (col2-col1+1) * xw.cw,
+ (row2-row1+1) * xw.ch);
+}
+
+/*
+ * Absolute coordinates.
+ */
+void
+xclear(int x1, int y1, int x2, int y2) {
+ XftDrawRect(xw.draw,
+ &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
+ x1, y1, x2-x1, y2-y1);
+}
+
+void
+xhints(void) {
+ XClassHint class = {opt_class ? opt_class : termname, termname};
+ XWMHints wm = {.flags = InputHint, .input = 1};
+ XSizeHints *sizeh = NULL;
+
+ sizeh = XAllocSizeHints();
+
+ sizeh->flags = PSize | PResizeInc | PBaseSize;
+ sizeh->height = xw.h;
+ sizeh->width = xw.w;
+ sizeh->height_inc = xw.ch;
+ sizeh->width_inc = xw.cw;
+ sizeh->base_height = 2 * borderpx;
+ sizeh->base_width = 2 * borderpx;
+ if(xw.isfixed == True) {
+ sizeh->flags |= PMaxSize | PMinSize;
+ sizeh->min_width = sizeh->max_width = xw.w;
+ sizeh->min_height = sizeh->max_height = xw.h;
+ }
+ if(xw.gm & (XValue|YValue)) {
+ sizeh->flags |= USPosition | PWinGravity;
+ sizeh->x = xw.l;
+ sizeh->y = xw.t;
+ sizeh->win_gravity = xgeommasktogravity(xw.gm);
+ }
+
+ XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
+ &class);
+ XFree(sizeh);
+}
+
+int
+xgeommasktogravity(int mask) {
+ switch(mask & (XNegative|YNegative)) {
+ case 0:
+ return NorthWestGravity;
+ case XNegative:
+ return NorthEastGravity;
+ case YNegative:
+ return SouthWestGravity;