chore: sync st with upstream

7 files changed, 72 insertions, 24 deletions

diff --git a/st/config.def.h b/st/config.def.h
index 2e6ae5f..444c838 100644
--- a/st/config.def.h
+++ b/st/config.def.h
@@ -53,7 +53,7 @@ int allowwindowops = 0;
  * near minlatency, but it waits longer for slow updates to avoid partial draw.
  * low minlatency will tear/flicker more, as it can "detect" idle too early.
  */
-static double minlatency = 8;
+static double minlatency = 2;
 static double maxlatency = 33;
 
 /*
diff --git a/st/config.h b/st/config.h
index 2e6ae5f..444c838 100644
--- a/st/config.h
+++ b/st/config.h
@@ -53,7 +53,7 @@ int allowwindowops = 0;
  * near minlatency, but it waits longer for slow updates to avoid partial draw.
  * low minlatency will tear/flicker more, as it can "detect" idle too early.
  */
-static double minlatency = 8;
+static double minlatency = 2;
 static double maxlatency = 33;
 
 /*
diff --git a/st/config.mk b/st/config.mk
index 47c615e..db31d85 100644
--- a/st/config.mk
+++ b/st/config.mk
@@ -1,5 +1,5 @@
 # st version
-VERSION = 0.9
+VERSION = 0.9.3
 
 # Customize below to fit your system
 
diff --git a/st/st.1 b/st/st.1
index 39120b4..88e4507 100644
--- a/st/st.1
+++ b/st/st.1
@@ -4,6 +4,8 @@ st \- simple terminal
 .SH SYNOPSIS
 .B st
 .RB [ \-aiv ]
+.RB [ \-A
+.IR alpha ]
 .RB [ \-c
 .IR class ]
 .RB [ \-f
@@ -28,6 +30,8 @@ st \- simple terminal
 .PP
 .B st
 .RB [ \-aiv ]
+.RB [ \-A
+.IR alpha ]
 .RB [ \-c
 .IR class ]
 .RB [ \-f
@@ -55,6 +59,9 @@ is a simple terminal emulator.
 .B \-a
 disable alternate screens in terminal
 .TP
+.BI \-A " alpha"
+defines the window's opacity.
+.TP
 .BI \-c " class"
 defines the window class (default $TERM).
 .TP
diff --git a/st/st.c b/st/st.c
index d6478f5..e9fea17 100644
--- a/st/st.c
+++ b/st/st.c
@@ -1132,6 +1132,7 @@ csiparse(void)
 {
 	char *p = csiescseq.buf, *np;
 	long int v;
+	int sep = ';'; /* colon or semi-colon, but not both */
 
 	csiescseq.narg = 0;
 	if (*p == '?') {
@@ -1149,7 +1150,9 @@ csiparse(void)
 			v = -1;
 		csiescseq.arg[csiescseq.narg++] = v;
 		p = np;
-		if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
+		if (sep == ';' && *p == ':')
+			sep = ':'; /* allow override to colon once */
+		if (*p != sep || csiescseq.narg == ESC_ARG_SIZ)
 			break;
 		p++;
 	}
@@ -1427,6 +1430,12 @@ tsetattr(const int *attr, int l)
 		case 49:
 			term.c.attr.bg = defaultbg;
 			break;
+		case 58:
+			/* This starts a sequence to change the color of
+			 * "underline" pixels. We don't support that and
+			 * instead eat up a following "5;n" or "2;r;g;b". */
+			tdefcolor(attr, &i, l);
+			break;
 		default:
 			if (BETWEEN(attr[i], 30, 37)) {
 				term.c.attr.fg = attr[i] - 30;
@@ -1643,7 +1652,7 @@ csihandle(void)
 			ttywrite(vtiden, strlen(vtiden), 0);
 		break;
 	case 'b': /* REP -- if last char is printable print it <n> more times */
-		DEFAULT(csiescseq.arg[0], 1);
+		LIMIT(csiescseq.arg[0], 1, 65535);
 		if (term.lastc)
 			while (csiescseq.arg[0]-- > 0)
 				tputc(term.lastc);
@@ -1702,7 +1711,7 @@ csihandle(void)
 			}
 			break;
 		case 1: /* above */
-			if (term.c.y > 1)
+			if (term.c.y > 0)
 				tclearregion(0, 0, term.col-1, term.c.y-1);
 			tclearregion(0, term.c.y, term.c.x, term.c.y);
 			break;
@@ -1728,6 +1737,7 @@ csihandle(void)
 		}
 		break;
 	case 'S': /* SU -- Scroll <n> line up */
+		if (csiescseq.priv) break;
 		DEFAULT(csiescseq.arg[0], 1);
 		tscrollup(term.top, csiescseq.arg[0]);
 		break;
@@ -1797,7 +1807,11 @@ csihandle(void)
 		tcursor(CURSOR_SAVE);
 		break;
 	case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
-		tcursor(CURSOR_LOAD);
+		if (csiescseq.priv) {
+			goto unknown;
+		} else {
+			tcursor(CURSOR_LOAD);
+		}
 		break;
 	case ' ':
 		switch (csiescseq.mode[1]) {
@@ -1953,6 +1967,19 @@ strhandle(void)
 				tfulldirt();
 			}
 			return;
+		case 110:
+		case 111:
+		case 112:
+			if (narg != 1)
+				break;
+			if ((j = par - 110) < 0 || j >= LEN(osc_table))
+				break; /* shouldn't be possible */
+			if (xsetcolorname(osc_table[j].idx, NULL)) {
+				fprintf(stderr, "erresc: %s color not found\n", osc_table[j].str);
+			} else {
+				tfulldirt();
+			}
+			return;
 		}
 		break;
 	case 'k': /* old title set compatibility */
diff --git a/st/st.h b/st/st.h
index 9f91e2a..fd3b0d8 100644
--- a/st/st.h
+++ b/st/st.h
@@ -124,4 +124,3 @@ extern unsigned int tabspaces;
 extern unsigned int defaultfg;
 extern unsigned int defaultbg;
 extern unsigned int defaultcs;
-extern float alpha;
diff --git a/st/x.c b/st/x.c
index 9c98b8d..e5175c6 100644
--- a/st/x.c
+++ b/st/x.c
@@ -244,7 +244,6 @@ static char *usedfont = NULL;
 static double usedfontsize = 0;
 static double defaultfontsize = 0;
 
-static char *opt_alpha = NULL;
 static char *opt_class = NULL;
 static char **opt_cmd  = NULL;
 static char *opt_embed = NULL;
@@ -815,9 +814,6 @@ xloadcols(void)
 				die("could not allocate color %d\n", i);
 		}
 
-	/* set alpha value of bg color */
-	if (opt_alpha)
-		alpha = strtof(opt_alpha, NULL);
 	dc.col[defaultbg].color.alpha = (unsigned short)(0xffff * alpha);
 	dc.col[defaultbg].pixel &= 0x00FFFFFF;
 	dc.col[defaultbg].pixel |= (unsigned char)(0xff * alpha) << 24;
@@ -851,6 +847,12 @@ xsetcolorname(int x, const char *name)
 	XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
 	dc.col[x] = ncolor;
 
+	if (x == defaultbg) {
+		dc.col[defaultbg].color.alpha = (unsigned short)(0xffff * alpha);
+		dc.col[defaultbg].pixel &= 0x00FFFFFF;
+		dc.col[defaultbg].pixel |= (unsigned char)(0xff * alpha) << 24;
+	}
+
 	return 0;
 }
 
@@ -1140,7 +1142,7 @@ xinit(int cols, int rows)
 {
 	XGCValues gcvalues;
 	Cursor cursor;
-	Window parent;
+	Window parent, root;
 	pid_t thispid = getpid();
 	XColor xmousefg, xmousebg;
 	XWindowAttributes attr;
@@ -1150,17 +1152,19 @@ xinit(int cols, int rows)
 		die("can't open display\n");
 	xw.scr = XDefaultScreen(xw.dpy);
 
-	if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0)))) {
-		parent = XRootWindow(xw.dpy, xw.scr);
-		xw.depth = 32;
+	root = XRootWindow(xw.dpy, xw.scr);
+	if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
+		parent = root;
+
+	if (XMatchVisualInfo(xw.dpy, xw.scr, 32, TrueColor, &vis) != 0) {
+		xw.vis = vis.visual;
+		xw.depth = vis.depth;
 	} else {
 		XGetWindowAttributes(xw.dpy, parent, &attr);
+		xw.vis = attr.visual;
 		xw.depth = attr.depth;
 	}
 
-	XMatchVisualInfo(xw.dpy, xw.scr, xw.depth, TrueColor, &vis);
-	xw.vis = vis.visual;
-
 	/* font */
 	if (!FcInit())
 		die("could not init fontconfig.\n");
@@ -1193,11 +1197,15 @@ xinit(int cols, int rows)
 			win.w, win.h, 0, xw.depth, InputOutput,
 			xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
 			| CWEventMask | CWColormap, &xw.attrs);
+	if (parent != root)
+		XReparentWindow(xw.dpy, xw.win, parent, xw.l, xw.t);
 
 	memset(&gcvalues, 0, sizeof(gcvalues));
 	gcvalues.graphics_exposures = False;
-	xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h, xw.depth);
-	dc.gc = XCreateGC(xw.dpy, xw.buf, GCGraphicsExposures, &gcvalues);
+	dc.gc = XCreateGC(xw.dpy, xw.win, GCGraphicsExposures,
+			&gcvalues);
+	xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
+			xw.depth);
 	XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
 	XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
 
@@ -1634,6 +1642,9 @@ xseticontitle(char *p)
 	XTextProperty prop;
 	DEFAULT(p, opt_title);
 
+	if (p[0] == '\0')
+		p = opt_title;
+
 	if (Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
 	                                &prop) != Success)
 		return;
@@ -1648,6 +1659,9 @@ xsettitle(char *p)
 	XTextProperty prop;
 	DEFAULT(p, opt_title);
 
+	if (p[0] == '\0')
+		p = opt_title;
+
 	if (Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
 	                                &prop) != Success)
 		return;
@@ -2034,11 +2048,11 @@ run(void)
 void
 usage(void)
 {
-	die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
+	die("usage: %s [-aiv] [-A alpha] [-c class] [-f font] [-g geometry]"
 	    " [-n name] [-o file]\n"
 	    "          [-T title] [-t title] [-w windowid]"
 	    " [[-e] command [args ...]]\n"
-	    "       %s [-aiv] [-c class] [-f font] [-g geometry]"
+	    "       %s [-aiv] [-A alpha] [-c class] [-f font] [-g geometry]"
 	    " [-n name] [-o file]\n"
 	    "          [-T title] [-t title] [-w windowid] -l line"
 	    " [stty_args ...]\n", argv0, argv0);
@@ -2056,7 +2070,8 @@ main(int argc, char *argv[])
 		allowaltscreen = 0;
 		break;
 	case 'A':
-		opt_alpha = EARGF(usage());
+		alpha = strtof(EARGF(usage()), NULL);
+		LIMIT(alpha, 0.0, 1.0);
 		break;
 	case 'c':
 		opt_class = EARGF(usage());