small changes

FAQ

@@ -1,253 +0,0 @@
-## Why does st not handle utmp entries?
-
-Use the excellent tool of [utmp](https://git.suckless.org/utmp/) for this task.
-
-
-## Some _random program_ complains that st is unknown/not recognised/unsupported/whatever!
-
-It means that st doesn’t have any terminfo entry on your system. Chances are
-you did not `make install`. If you just want to test it without installing it,
-you can manually run `tic -sx st.info`.
-
-
-## Nothing works, and nothing is said about an unknown terminal!
-
-* Some programs just assume they’re running in xterm i.e. they don’t rely on
-  terminfo. What you see is the current state of the “xterm compliance”.
-* Some programs don’t complain about the lacking st description and default to
-  another terminal. In that case see the question about terminfo.
-
-
-## How do I scroll back up?
-
-* Using a terminal multiplexer.
-	* `st -e tmux` using C-b [
-	* `st -e screen` using C-a ESC
-* Using the excellent tool of [scroll](https://git.suckless.org/scroll/).
-* Using the scrollback [patch](https://st.suckless.org/patches/scrollback/).
-
-
-## I would like to have utmp and/or scroll functionality by default
-
-You can add the absolute path of both programs in your config.h file. You only
-have to modify the value of utmp and scroll variables.
-
-
-## Why doesn't the Del key work in some programs?
-
-Taken from the terminfo manpage:
-
-	If the terminal has a keypad that transmits codes when the keys
-	are pressed, this information can be given. Note that it is not
-	possible to handle terminals where the keypad only works in
-	local (this applies, for example, to the unshifted HP 2621 keys).
-	If the keypad can be set to transmit or not transmit, give these
-	codes as smkx and rmkx. Otherwise the keypad is assumed to
-	always transmit.
-
-In the st case smkx=E[?1hE= and rmkx=E[?1lE>, so it is mandatory that
-applications which want to test against keypad keys send these
-sequences.
-
-But buggy applications (like bash and irssi, for example) don't do this. A fast
-solution for them is to use the following command:
-
-	$ printf '\033[?1h\033=' >/dev/tty
-
-or
-	$ tput smkx
-
-In the case of bash, readline is used. Readline has a different note in its
-manpage about this issue:
-
-	enable-keypad (Off)
-		When set to On, readline will try to enable the
-		application keypad when it is called. Some systems
-		need this to enable arrow keys.
-
-Adding this option to your .inputrc will fix the keypad problem for all
-applications using readline.
-
-If you are using zsh, then read the zsh FAQ
-<http://zsh.sourceforge.net/FAQ/zshfaq03.html#l25>:
-
-	It should be noted that the O / [ confusion can occur with other keys
-	such as Home and End. Some systems let you query the key sequences
-	sent by these keys from the system's terminal database, terminfo.
-	Unfortunately, the key sequences given there typically apply to the
-	mode that is not the one zsh uses by default (it's the "application"
-	mode rather than the "raw" mode). Explaining the use of terminfo is
-	outside of the scope of this FAQ, but if you wish to use the key
-	sequences given there you can tell the line editor to turn on
-	"application" mode when it starts and turn it off when it stops:
-
-		function zle-line-init () { echoti smkx }
-		function zle-line-finish () { echoti rmkx }
-		zle -N zle-line-init
-		zle -N zle-line-finish
-
-Putting these lines into your .zshrc will fix the problems.
-
-
-## How can I use meta in 8bit mode?
-
-St supports meta in 8bit mode, but the default terminfo entry doesn't
-use this capability. If you want it, you have to use the 'st-meta' value
-in TERM.
-
-
-## I cannot compile st in OpenBSD
-
-OpenBSD lacks librt, despite it being mandatory in POSIX
-<http://pubs.opengroup.org/onlinepubs/9699919799/utilities/c99.html#tag_20_11_13>.
-If you want to compile st for OpenBSD you have to remove -lrt from config.mk, and
-st will compile without any loss of functionality, because all the functions are
-included in libc on this platform.
-
-
-## The Backspace Case
-
-St is emulating the Linux way of handling backspace being delete and delete being
-backspace.
-
-This is an issue that was discussed in suckless mailing list
-<https://lists.suckless.org/dev/1404/20697.html>. Here is why some old grumpy
-terminal users wants its backspace to be how he feels it:
-
-	Well, I am going to comment why I want to change the behaviour
-	of this key. When ASCII was defined in 1968, communication
-	with computers was done using punched cards, or hardcopy
-	terminals (basically a typewriter machine connected with the
-	computer using a serial port).  ASCII defines DELETE as 7F,
-	because, in punched-card terms, it means all the holes of the
-	card punched; it is thus a kind of 'physical delete'. In the
-	same way, the BACKSPACE key was a non-destructive backspace,
-	as on a typewriter.  So, if you wanted to delete a character,
-	you had to BACKSPACE and then DELETE.  Another use of BACKSPACE
-	was to type accented characters, for example 'a BACKSPACE `'.
-	The VT100 had no BACKSPACE key; it was generated using the
-	CONTROL key as another control character (CONTROL key sets to
-	0 b7 b6 b5, so it converts H (code 0x48) into BACKSPACE (code
-	0x08)), but it had a DELETE key in a similar position where
-	the BACKSPACE key is located today on common PC keyboards.
-	All the terminal emulators emulated the difference between
-	these keys correctly: the backspace key generated a BACKSPACE
-	(^H) and delete key generated a DELETE (^?).
-
-	But a problem arose when Linus Torvalds wrote Linux. Unlike
-	earlier terminals, the Linux virtual terminal (the terminal
-	emulator integrated in the kernel) returned a DELETE when
-	backspace was pressed, due to the VT100 having a DELETE key in
-	the same position.  This created a lot of problems (see [1]
-	and [2]). Since Linux has become the king, a lot of terminal
-	emulators today generate a DELETE when the backspace key is
-	pressed in order to avoid problems with Linux. The result is
-	that the only way of generating a BACKSPACE on these systems
-	is by using CONTROL + H. (I also think that emacs had an
-	important point here because the CONTROL + H prefix is used
-	in emacs in some commands (help commands).)
-
-	From point of view of the kernel, you can change the key
-	for deleting a previous character with stty erase. When you
-	connect a real terminal into a machine you describe the type
-	of terminal, so getty configures the correct value of stty
-	erase for this terminal. In the case of terminal emulators,
-	however, you don't have any getty that can set the correct
-	value of stty erase, so you always get the default value.
-	For this reason, it is necessary to add 'stty erase ^H' to your
-	profile if you have changed the value of the backspace key.
-	Of course, another solution is for st itself to modify the
-	value of stty erase.  I usually have the inverse problem:
-	when I connect to non-Unix machines, I have to press CONTROL +
-	h to get a BACKSPACE. The inverse problem occurs when a user
-	connects to my Unix machines from a different system with a
-	correct backspace key.
-
-	[1] http://www.ibb.net/~anne/keyboard.html
-	[2] http://www.tldp.org/HOWTO/Keyboard-and-Console-HOWTO-5.html
-
-
-## But I really want the old grumpy behaviour of my terminal
-
-Apply [1].
-
-[1] https://st.suckless.org/patches/delkey
-
-
-## Why do images not work in st using the w3m image hack?
-
-w3mimg uses a hack that draws an image on top of the terminal emulator Drawable
-window. The hack relies on the terminal to use a single buffer to draw its
-contents directly.
-
-st uses double-buffered drawing so the image is quickly replaced and may show a
-short flicker effect.
-
-Below is a patch example to change st double-buffering to a single Drawable
-buffer.
-
-diff --git a/x.c b/x.c
---- a/x.c
-+++ b/x.c
-@@ -732,10 +732,6 @@ xresize(int col, int row)
- 	win.tw = col * win.cw;
- 	win.th = row * win.ch;
- 
--	XFreePixmap(xw.dpy, xw.buf);
--	xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
--			DefaultDepth(xw.dpy, xw.scr));
--	XftDrawChange(xw.draw, xw.buf);
- 	xclear(0, 0, win.w, win.h);
- 
- 	/* resize to new width */
-@@ -1148,8 +1144,7 @@ xinit(int cols, int rows)
- 	gcvalues.graphics_exposures = False;
- 	dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
- 			&gcvalues);
--	xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
--			DefaultDepth(xw.dpy, xw.scr));
-+	xw.buf = xw.win;
- 	XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
- 	XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
- 
-@@ -1632,8 +1627,6 @@ xdrawline(Line line, int x1, int y1, int x2)
- void
- xfinishdraw(void)
- {
--	XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
--			win.h, 0, 0);
- 	XSetForeground(xw.dpy, dc.gc,
- 			dc.col[IS_SET(MODE_REVERSE)?
- 				defaultfg : defaultbg].pixel);
-
-
-## BadLength X error in Xft when trying to render emoji
-
-Xft makes st crash when rendering color emojis with the following error:
-
-"X Error of failed request:  BadLength (poly request too large or internal Xlib length error)"
-  Major opcode of failed request:  139 (RENDER)
-  Minor opcode of failed request:  20 (RenderAddGlyphs)
-  Serial number of failed request: 1595
-  Current serial number in output stream:  1818"
-
-This is a known bug in Xft (not st) which happens on some platforms and
-combination of particular fonts and fontconfig settings.
-
-See also:
-https://gitlab.freedesktop.org/xorg/lib/libxft/issues/6
-https://bugs.freedesktop.org/show_bug.cgi?id=107534
-https://bugzilla.redhat.com/show_bug.cgi?id=1498269
-
-The solution is to remove color emoji fonts or disable this in the fontconfig
-XML configuration.  As an ugly workaround (which may work only on newer
-fontconfig versions (FC_COLOR)), the following code can be used to mask color
-fonts:
-
-	FcPatternAddBool(fcpattern, FC_COLOR, FcFalse);
-
-Please don't bother reporting this bug to st, but notify the upstream Xft
-developers about fixing this bug.
-
-As of 2022-09-05 this now seems to be finally fixed in libXft 2.3.5:
-https://gitlab.freedesktop.org/xorg/lib/libxft/-/blob/libXft-2.3.5/NEWS

LEGACY

@@ -1,17 +0,0 @@
-A STATEMENT ON LEGACY SUPPORT
-
-In the terminal world there is much cruft that comes from old and unsup‐
-ported terminals that inherit incompatible modes  and  escape  sequences
-which noone is able to know, except when he/she comes from that time and
-developed a graphical vt100 emulator at that time.
-
-One  goal  of  st is to only support what is really needed. When you en‐
-counter a sequence which you really need, implement it.  But  while  you
-are  at it,  do not add the other cruft you might encounter while sneek‐
-ing at other terminal emulators. History has bloated them and  there  is
-no real evidence that most of the sequences are used today.
-
-
-Christoph Lohmann <20h@r-36.net>
-2012-09-13T07:00:36.081271045+02:00
-

Makefile

@@ -4,7 +4,7 @@
 
 include config.mk
 
-SRC = st.c x.c
+SRC = st.c x.c boxdraw.c hb.c
 OBJ = $(SRC:.c=.o)
 
 all: options st
@@ -22,7 +22,9 @@ config.h:
 	$(CC) $(STCFLAGS) -c $<
 
 st.o: config.h st.h win.h
-x.o: arg.h config.h st.h win.h
+x.o: arg.h config.h st.h win.h hb.h
+boxdraw.o: config.h st.h boxdraw_data.h
+hb.o: st.h
 
 $(OBJ): config.h config.mk
 

README

@@ -1,34 +0,0 @@
-st - simple terminal
---------------------
-st is a simple terminal emulator for X which sucks less.
-
-
-Requirements
-------------
-In order to build st you need the Xlib header files.
-
-
-Installation
-------------
-Edit config.mk to match your local setup (st is installed into
-the /usr/local namespace by default).
-
-Afterwards enter the following command to build and install st (if
-necessary as root):
-
-    make clean install
-
-
-Running st
-----------
-If you did not install st with make clean install, you must compile
-the st terminfo entry with the following command:
-
-    tic -sx st.info
-
-See the man page for additional details.
-
-Credits
--------
-Based on Aurélien APTEL <aurelien dot aptel at gmail dot com> bt source code.
-

TODO

@@ -1,28 +0,0 @@
-vt emulation
-------------
-
-* double-height support
-
-code & interface
-----------------
-
-* add a simple way to do multiplexing
-
-drawing
--------
-* add diacritics support to xdraws()
-	* switch to a suckless font drawing library
-* make the font cache simpler
-* add better support for brightening of the upper colors
-
-bugs
-----
-
-* fix shift up/down (shift selection in emacs)
-* remove DEC test sequence when appropriate
-
-misc
-----
-
-    $ grep -nE 'XXX|TODO' st.c
-

TODO.md

@@ -0,0 +1,2 @@
+# TODO
+- [ ] Make undercurl more subtle

boxdraw.c

@@ -0,0 +1,194 @@
+/*
+ * Copyright 2018 Avi Halachmi (:avih) avihpit@yahoo.com https://github.com/avih
+ * MIT/X Consortium License
+ */
+
+#include <X11/Xft/Xft.h>
+#include "st.h"
+#include "boxdraw_data.h"
+
+/* Rounded non-negative integers division of n / d  */
+#define DIV(n, d) (((n) + (d) / 2) / (d))
+
+static Display *xdpy;
+static Colormap xcmap;
+static XftDraw *xd;
+static Visual *xvis;
+
+static void drawbox(int, int, int, int, XftColor *, XftColor *, ushort);
+static void drawboxlines(int, int, int, int, XftColor *, ushort);
+
+/* public API */
+
+void
+boxdraw_xinit(Display *dpy, Colormap cmap, XftDraw *draw, Visual *vis)
+{
+	xdpy = dpy; xcmap = cmap; xd = draw, xvis = vis;
+}
+
+int
+isboxdraw(Rune u)
+{
+	Rune block = u & ~0xff;
+	return (boxdraw && block == 0x2500 && boxdata[(uint8_t)u]) ||
+	       (boxdraw_braille && block == 0x2800);
+}
+
+/* the "index" is actually the entire shape data encoded as ushort */
+ushort
+boxdrawindex(const Glyph *g)
+{
+	if (boxdraw_braille && (g->u & ~0xff) == 0x2800)
+		return BRL | (uint8_t)g->u;
+	if (boxdraw_bold && (g->mode & ATTR_BOLD))
+		return BDB | boxdata[(uint8_t)g->u];
+	return boxdata[(uint8_t)g->u];
+}
+
+void
+drawboxes(int x, int y, int cw, int ch, XftColor *fg, XftColor *bg,
+          const XftGlyphFontSpec *specs, int len)
+{
+	for ( ; len-- > 0; x += cw, specs++)
+		drawbox(x, y, cw, ch, fg, bg, (ushort)specs->glyph);
+}
+
+/* implementation */
+
+void
+drawbox(int x, int y, int w, int h, XftColor *fg, XftColor *bg, ushort bd)
+{
+	ushort cat = bd & ~(BDB | 0xff);  /* mask out bold and data */
+	if (bd & (BDL | BDA)) {
+		/* lines (light/double/heavy/arcs) */
+		drawboxlines(x, y, w, h, fg, bd);
+
+	} else if (cat == BBD) {
+		/* lower (8-X)/8 block */
+		int d = DIV((uint8_t)bd * h, 8);
+		XftDrawRect(xd, fg, x, y + d, w, h - d);
+
+	} else if (cat == BBU) {
+		/* upper X/8 block */
+		XftDrawRect(xd, fg, x, y, w, DIV((uint8_t)bd * h, 8));
+
+	} else if (cat == BBL) {
+		/* left X/8 block */
+		XftDrawRect(xd, fg, x, y, DIV((uint8_t)bd * w, 8), h);
+
+	} else if (cat == BBR) {
+		/* right (8-X)/8 block */
+		int d = DIV((uint8_t)bd * w, 8);
+		XftDrawRect(xd, fg, x + d, y, w - d, h);
+
+	} else if (cat == BBQ) {
+		/* Quadrants */
+		int w2 = DIV(w, 2), h2 = DIV(h, 2);
+		if (bd & TL)
+			XftDrawRect(xd, fg, x, y, w2, h2);
+		if (bd & TR)
+			XftDrawRect(xd, fg, x + w2, y, w - w2, h2);
+		if (bd & BL)
+			XftDrawRect(xd, fg, x, y + h2, w2, h - h2);
+		if (bd & BR)
+			XftDrawRect(xd, fg, x + w2, y + h2, w - w2, h - h2);
+
+	} else if (bd & BBS) {
+		/* Shades - data is 1/2/3 for 25%/50%/75% alpha, respectively */
+		int d = (uint8_t)bd;
+		XftColor xfc;
+		XRenderColor xrc = { .alpha = 0xffff };
+
+		xrc.red = DIV(fg->color.red * d + bg->color.red * (4 - d), 4);
+		xrc.green = DIV(fg->color.green * d + bg->color.green * (4 - d), 4);
+		xrc.blue = DIV(fg->color.blue * d + bg->color.blue * (4 - d), 4);
+
+		XftColorAllocValue(xdpy, xvis, xcmap, &xrc, &xfc);
+		XftDrawRect(xd, &xfc, x, y, w, h);
+		XftColorFree(xdpy, xvis, xcmap, &xfc);
+
+	} else if (cat == BRL) {
+		/* braille, each data bit corresponds to one dot at 2x4 grid */
+		int w1 = DIV(w, 2);
+		int h1 = DIV(h, 4), h2 = DIV(h, 2), h3 = DIV(3 * h, 4);
+
+		if (bd & 1)   XftDrawRect(xd, fg, x, y, w1, h1);
+		if (bd & 2)   XftDrawRect(xd, fg, x, y + h1, w1, h2 - h1);
+		if (bd & 4)   XftDrawRect(xd, fg, x, y + h2, w1, h3 - h2);
+		if (bd & 8)   XftDrawRect(xd, fg, x + w1, y, w - w1, h1);
+		if (bd & 16)  XftDrawRect(xd, fg, x + w1, y + h1, w - w1, h2 - h1);
+		if (bd & 32)  XftDrawRect(xd, fg, x + w1, y + h2, w - w1, h3 - h2);
+		if (bd & 64)  XftDrawRect(xd, fg, x, y + h3, w1, h - h3);
+		if (bd & 128) XftDrawRect(xd, fg, x + w1, y + h3, w - w1, h - h3);
+
+	}
+}
+
+void
+drawboxlines(int x, int y, int w, int h, XftColor *fg, ushort bd)
+{
+	/* s: stem thickness. width/8 roughly matches underscore thickness. */
+	/* We draw bold as 1.5 * normal-stem and at least 1px thicker.      */
+	/* doubles draw at least 3px, even when w or h < 3. bold needs 6px. */
+	int mwh = MIN(w, h);
+	int base_s = MAX(1, DIV(mwh, 8));
+	int bold = (bd & BDB) && mwh >= 6;  /* possibly ignore boldness */
+	int s = bold ? MAX(base_s + 1, DIV(3 * base_s, 2)) : base_s;
+	int w2 = DIV(w - s, 2), h2 = DIV(h - s, 2);
+	/* the s-by-s square (x + w2, y + h2, s, s) is the center texel.    */
+	/* The base length (per direction till edge) includes this square.  */
+
+	int light = bd & (LL | LU | LR | LD);
+	int double_ = bd & (DL | DU | DR | DD);
+
+	if (light) {
+		/* d: additional (negative) length to not-draw the center   */
+		/* texel - at arcs and avoid drawing inside (some) doubles  */
+		int arc = bd & BDA;
+		int multi_light = light & (light - 1);
+		int multi_double = double_ & (double_ - 1);
+		/* light crosses double only at DH+LV, DV+LH (ref. shapes)  */
+		int d = arc || (multi_double && !multi_light) ? -s : 0;
+
+		if (bd & LL)
+			XftDrawRect(xd, fg, x, y + h2, w2 + s + d, s);
+		if (bd & LU)
+			XftDrawRect(xd, fg, x + w2, y, s, h2 + s + d);
+		if (bd & LR)
+			XftDrawRect(xd, fg, x + w2 - d, y + h2, w - w2 + d, s);
+		if (bd & LD)
+			XftDrawRect(xd, fg, x + w2, y + h2 - d, s, h - h2 + d);
+	}
+
+	/* double lines - also align with light to form heavy when combined */
+	if (double_) {
+		/*
+		* going clockwise, for each double-ray: p is additional length
+		* to the single-ray nearer to the previous direction, and n to
+		* the next. p and n adjust from the base length to lengths
+		* which consider other doubles - shorter to avoid intersections
+		* (p, n), or longer to draw the far-corner texel (n).
+		*/
+		int dl = bd & DL, du = bd & DU, dr = bd & DR, dd = bd & DD;
+		if (dl) {
+			int p = dd ? -s : 0, n = du ? -s : dd ? s : 0;
+			XftDrawRect(xd, fg, x, y + h2 + s, w2 + s + p, s);
+			XftDrawRect(xd, fg, x, y + h2 - s, w2 + s + n, s);
+		}
+		if (du) {
+			int p = dl ? -s : 0, n = dr ? -s : dl ? s : 0;
+			XftDrawRect(xd, fg, x + w2 - s, y, s, h2 + s + p);
+			XftDrawRect(xd, fg, x + w2 + s, y, s, h2 + s + n);
+		}
+		if (dr) {
+			int p = du ? -s : 0, n = dd ? -s : du ? s : 0;
+			XftDrawRect(xd, fg, x + w2 - p, y + h2 - s, w - w2 + p, s);
+			XftDrawRect(xd, fg, x + w2 - n, y + h2 + s, w - w2 + n, s);
+		}
+		if (dd) {
+			int p = dr ? -s : 0, n = dl ? -s : dr ? s : 0;
+			XftDrawRect(xd, fg, x + w2 + s, y + h2 - p, s, h - h2 + p);
+			XftDrawRect(xd, fg, x + w2 - s, y + h2 - n, s, h - h2 + n);
+		}
+	}
+}

boxdraw_data.h

@@ -0,0 +1,214 @@
+/*
+ * Copyright 2018 Avi Halachmi (:avih) avihpit@yahoo.com https://github.com/avih
+ * MIT/X Consortium License
+ */
+
+/*
+ * U+25XX codepoints data
+ *
+ * References:
+ *   http://www.unicode.org/charts/PDF/U2500.pdf
+ *   http://www.unicode.org/charts/PDF/U2580.pdf
+ *
+ * Test page:
+ *   https://github.com/GNOME/vte/blob/master/doc/boxes.txt
+ */
+
+/* Each shape is encoded as 16-bits. Higher bits are category, lower are data */
+/* Categories (mutually exclusive except BDB): */
+/* For convenience, BDL/BDA/BBS/BDB are 1 bit each, the rest are enums */
+#define BDL (1<<8)   /* Box Draw Lines (light/double/heavy) */
+#define BDA (1<<9)   /* Box Draw Arc (light) */
+
+#define BBD (1<<10)  /* Box Block Down (lower) X/8 */
+#define BBL (2<<10)  /* Box Block Left X/8 */
+#define BBU (3<<10)  /* Box Block Upper X/8 */
+#define BBR (4<<10)  /* Box Block Right X/8 */
+#define BBQ (5<<10)  /* Box Block Quadrants */
+#define BRL (6<<10)  /* Box Braille (data is lower byte of U28XX) */
+
+#define BBS (1<<14)  /* Box Block Shades */
+#define BDB (1<<15)  /* Box Draw is Bold */
+
+/* (BDL/BDA) Light/Double/Heavy x Left/Up/Right/Down/Horizontal/Vertical      */
+/* Heavy is light+double (literally drawing light+double align to form heavy) */
+#define LL (1<<0)
+#define LU (1<<1)
+#define LR (1<<2)
+#define LD (1<<3)
+#define LH (LL+LR)
+#define LV (LU+LD)
+
+#define DL (1<<4)
+#define DU (1<<5)
+#define DR (1<<6)
+#define DD (1<<7)
+#define DH (DL+DR)
+#define DV (DU+DD)
+
+#define HL (LL+DL)
+#define HU (LU+DU)
+#define HR (LR+DR)
+#define HD (LD+DD)
+#define HH (HL+HR)
+#define HV (HU+HD)
+
+/* (BBQ) Quadrants Top/Bottom x Left/Right */
+#define TL (1<<0)
+#define TR (1<<1)
+#define BL (1<<2)
+#define BR (1<<3)
+
+/* Data for U+2500 - U+259F except dashes/diagonals */
+static const unsigned short boxdata[256] = {
+	/* light lines */
+	[0x00] = BDL + LH,       /* light horizontal */
+	[0x02] = BDL + LV,       /* light vertical */
+	[0x0c] = BDL + LD + LR,  /* light down and right */
+	[0x10] = BDL + LD + LL,  /* light down and left */
+	[0x14] = BDL + LU + LR,  /* light up and right */
+	[0x18] = BDL + LU + LL,  /* light up and left */
+	[0x1c] = BDL + LV + LR,  /* light vertical and right */
+	[0x24] = BDL + LV + LL,  /* light vertical and left */
+	[0x2c] = BDL + LH + LD,  /* light horizontal and down */
+	[0x34] = BDL + LH + LU,  /* light horizontal and up */
+	[0x3c] = BDL + LV + LH,  /* light vertical and horizontal */
+	[0x74] = BDL + LL,       /* light left */
+	[0x75] = BDL + LU,       /* light up */
+	[0x76] = BDL + LR,       /* light right */
+	[0x77] = BDL + LD,       /* light down */
+
+	/* heavy [+light] lines */
+	[0x01] = BDL + HH,
+	[0x03] = BDL + HV,
+	[0x0d] = BDL + HR + LD,
+	[0x0e] = BDL + HD + LR,
+	[0x0f] = BDL + HD + HR,
+	[0x11] = BDL + HL + LD,
+	[0x12] = BDL + HD + LL,
+	[0x13] = BDL + HD + HL,
+	[0x15] = BDL + HR + LU,
+	[0x16] = BDL + HU + LR,
+	[0x17] = BDL + HU + HR,
+	[0x19] = BDL + HL + LU,
+	[0x1a] = BDL + HU + LL,
+	[0x1b] = BDL + HU + HL,
+	[0x1d] = BDL + HR + LV,
+	[0x1e] = BDL + HU + LD + LR,
+	[0x1f] = BDL + HD + LR + LU,
+	[0x20] = BDL + HV + LR,
+	[0x21] = BDL + HU + HR + LD,
+	[0x22] = BDL + HD + HR + LU,
+	[0x23] = BDL + HV + HR,
+	[0x25] = BDL + HL + LV,
+	[0x26] = BDL + HU + LD + LL,
+	[0x27] = BDL + HD + LU + LL,
+	[0x28] = BDL + HV + LL,
+	[0x29] = BDL + HU + HL + LD,
+	[0x2a] = BDL + HD + HL + LU,
+	[0x2b] = BDL + HV + HL,
+	[0x2d] = BDL + HL + LD + LR,
+	[0x2e] = BDL + HR + LL + LD,
+	[0x2f] = BDL + HH + LD,
+	[0x30] = BDL + HD + LH,
+	[0x31] = BDL + HD + HL + LR,
+	[0x32] = BDL + HR + HD + LL,
+	[0x33] = BDL + HH + HD,
+	[0x35] = BDL + HL + LU + LR,
+	[0x36] = BDL + HR + LU + LL,
+	[0x37] = BDL + HH + LU,
+	[0x38] = BDL + HU + LH,
+	[0x39] = BDL + HU + HL + LR,
+	[0x3a] = BDL + HU + HR + LL,
+	[0x3b] = BDL + HH + HU,
+	[0x3d] = BDL + HL + LV + LR,
+	[0x3e] = BDL + HR + LV + LL,
+	[0x3f] = BDL + HH + LV,
+	[0x40] = BDL + HU + LH + LD,
+	[0x41] = BDL + HD + LH + LU,
+	[0x42] = BDL + HV + LH,
+	[0x43] = BDL + HU + HL + LD + LR,
+	[0x44] = BDL + HU + HR + LD + LL,
+	[0x45] = BDL + HD + HL + LU + LR,
+	[0x46] = BDL + HD + HR + LU + LL,
+	[0x47] = BDL + HH + HU + LD,
+	[0x48] = BDL + HH + HD + LU,
+	[0x49] = BDL + HV + HL + LR,
+	[0x4a] = BDL + HV + HR + LL,
+	[0x4b] = BDL + HV + HH,
+	[0x78] = BDL + HL,
+	[0x79] = BDL + HU,
+	[0x7a] = BDL + HR,
+	[0x7b] = BDL + HD,
+	[0x7c] = BDL + HR + LL,
+	[0x7d] = BDL + HD + LU,
+	[0x7e] = BDL + HL + LR,
+	[0x7f] = BDL + HU + LD,
+
+	/* double [+light] lines */
+	[0x50] = BDL + DH,
+	[0x51] = BDL + DV,
+	[0x52] = BDL + DR + LD,
+	[0x53] = BDL + DD + LR,
+	[0x54] = BDL + DR + DD,
+	[0x55] = BDL + DL + LD,
+	[0x56] = BDL + DD + LL,
+	[0x57] = BDL + DL + DD,
+	[0x58] = BDL + DR + LU,
+	[0x59] = BDL + DU + LR,
+	[0x5a] = BDL + DU + DR,
+	[0x5b] = BDL + DL + LU,
+	[0x5c] = BDL + DU + LL,
+	[0x5d] = BDL + DL + DU,
+	[0x5e] = BDL + DR + LV,
+	[0x5f] = BDL + DV + LR,
+	[0x60] = BDL + DV + DR,
+	[0x61] = BDL + DL + LV,
+	[0x62] = BDL + DV + LL,
+	[0x63] = BDL + DV + DL,
+	[0x64] = BDL + DH + LD,
+	[0x65] = BDL + DD + LH,
+	[0x66] = BDL + DD + DH,
+	[0x67] = BDL + DH + LU,
+	[0x68] = BDL + DU + LH,
+	[0x69] = BDL + DH + DU,
+	[0x6a] = BDL + DH + LV,
+	[0x6b] = BDL + DV + LH,
+	[0x6c] = BDL + DH + DV,
+
+	/* (light) arcs */
+	[0x6d] = BDA + LD + LR,
+	[0x6e] = BDA + LD + LL,
+	[0x6f] = BDA + LU + LL,
+	[0x70] = BDA + LU + LR,
+
+	/* Lower (Down) X/8 block (data is 8 - X) */
+	[0x81] = BBD + 7, [0x82] = BBD + 6, [0x83] = BBD + 5, [0x84] = BBD + 4,
+	[0x85] = BBD + 3, [0x86] = BBD + 2, [0x87] = BBD + 1, [0x88] = BBD + 0,
+
+	/* Left X/8 block (data is X) */
+	[0x89] = BBL + 7, [0x8a] = BBL + 6, [0x8b] = BBL + 5, [0x8c] = BBL + 4,
+	[0x8d] = BBL + 3, [0x8e] = BBL + 2, [0x8f] = BBL + 1,
+
+	/* upper 1/2 (4/8), 1/8 block (X), right 1/2, 1/8 block (8-X) */
+	[0x80] = BBU + 4, [0x94] = BBU + 1,
+	[0x90] = BBR + 4, [0x95] = BBR + 7,
+
+	/* Quadrants */
+	[0x96] = BBQ + BL,
+	[0x97] = BBQ + BR,
+	[0x98] = BBQ + TL,
+	[0x99] = BBQ + TL + BL + BR,
+	[0x9a] = BBQ + TL + BR,
+	[0x9b] = BBQ + TL + TR + BL,
+	[0x9c] = BBQ + TL + TR + BR,
+	[0x9d] = BBQ + TR,
+	[0x9e] = BBQ + BL + TR,
+	[0x9f] = BBQ + BL + TR + BR,
+
+	/* Shades, data is an alpha value in 25% units (1/4, 1/2, 3/4) */
+	[0x91] = BBS + 1, [0x92] = BBS + 2, [0x93] = BBS + 3,
+
+	/* U+2504 - U+250B, U+254C - U+254F: unsupported (dashes) */
+	/* U+2571 - U+2573: unsupported (diagonals) */
+};

config.h

@@ -1,13 +1,15 @@
 /* See LICENSE file for copyright and license details. */
 
-/*
- * appearance
- *
- * font: see http://freedesktop.org/software/fontconfig/fontconfig-user.html
- */
-static char *font = "Liberation Mono:pixelsize=12:antialias=true:autohint=true";
+static char *font = "FiraCode Nerd Font Mono:pixelsize=14";
 static int borderpx = 2;
 
+/* Underline curl style
+ * CURLY 0
+ * SPIKY 1
+ * CAPPED 2
+ */
+#define UNDERCURL_STYLE 2
+
 /*
  * What program is execed by st depends of these precedence rules:
  * 1: program passed with -e
@@ -60,13 +62,25 @@ static double maxlatency = 33;
  * blinking timeout (set to 0 to disable blinking) for the terminal blinking
  * attribute.
  */
-static unsigned int blinktimeout = 800;
+static unsigned int blinktimeout = 600;
 
 /*
  * thickness of underline and bar cursors
  */
 static unsigned int cursorthickness = 2;
 
+/*
+ * 1: render most of the lines/blocks characters without using the font for
+ *    perfect alignment between cells (U2500 - U259F except dashes/diagonals).
+ *    Bold affects lines thickness if boxdraw_bold is not 0. Italic is ignored.
+ * 0: disable (render all U25XX glyphs normally from the font).
+ */
+const int boxdraw = 1;
+const int boxdraw_bold = 0;
+
+/* braille (U28XX):  1: render as adjacent "pixels",  0: use font */
+const int boxdraw_braille = 0;
+
 /*
  * bell volume. It must be a value between -100 and 100. Use 0 for disabling
  * it
@@ -96,52 +110,61 @@ unsigned int tabspaces = 8;
 /* Terminal colors (16 first used in escape sequence) */
 static const char *colorname[] = {
 	/* 8 normal colors */
-	"black",
-	"red3",
-	"green3",
-	"yellow3",
-	"blue2",
-	"magenta3",
-	"cyan3",
-	"gray90",
+	"#15161E",
+	"#f7768e",
+	"#9ece6a",
+	"#e0af68",
+	"#7aa2f7",
+	"#bb9af7",
+	"#7dcfff",
+	"#a9b1d6",
 
 	/* 8 bright colors */
-	"gray50",
-	"red",
-	"green",
-	"yellow",
-	"#5c5cff",
-	"magenta",
-	"cyan",
-	"white",
+	"#414868",
+	"#f7768e",
+	"#9ece6a",
+	"#e0af68",
+	"#7aa2f7",
+	"#bb9af7",
+	"#7dcfff",
+	"#c0caf5",
 
 	[255] = 0,
 
-	/* more colors can be added after 255 to use with DefaultXX */
-	"#cccccc",
-	"#555555",
-	"gray90", /* default foreground colour */
-	"black", /* default background colour */
+    // indexes beyond 255 are used for internal colors
+	"#c0caf5", /* default cursor colour */
+	"#1a1b26", /* default inverted cursor colour */
+	"#c0caf5", /* default foreground colour */
+	"#1a1b26", /* default background colour */
+    "#c0caf5", /* default selection foreground colour */
+    "#33467C", /* default selection background colour */
 };
 
-
-/*
- * Default colors (colorname index)
- * foreground, background, cursor, reverse cursor
- */
-unsigned int defaultfg = 258;
-unsigned int defaultbg = 259;
 unsigned int defaultcs = 256;
 static unsigned int defaultrcs = 257;
+unsigned int defaultfg = 258;
+unsigned int defaultbg = 259;
+unsigned int selectionfg = 260;
+unsigned int selectionbg = 261;
+/* If 0 use selectionfg as foreground in order to have a uniform foreground-color */
+/* Else if 1 keep original foreground-color of each cell => more colors :) */
+static int ignoreselfg = 1;
 
 /*
- * Default shape of cursor
- * 2: Block ("█")
- * 4: Underline ("_")
- * 6: Bar ("|")
- * 7: Snowman ("☃")
++ * https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h4-Functions-using-CSI-_-ordered-by-the-final-character-lparen-s-rparen:CSI-Ps-SP-q.1D81
++ * Default style of cursor
++ * 0: blinking block
++ * 1: blinking block (default)
++ * 2: steady block ("█")
++ * 3: blinking underline
++ * 4: steady underline ("_")
++ * 5: blinking bar
++ * 6: steady bar ("|")
++ * 7: blinking st cursor
++ * 8: steady st cursor
  */
-static unsigned int cursorshape = 2;
+static unsigned int cursorstyle = 1;
+static Rune stcursor = 0x2603; /* snowman ("☃") */
 
 /*
  * Default columns and rows numbers
@@ -278,7 +301,7 @@ static Key key[] = {
 	{ XK_KP_Delete,     ControlMask,    "\033[3;5~",    +1,    0},
 	{ XK_KP_Delete,     ShiftMask,      "\033[2K",      -1,    0},
 	{ XK_KP_Delete,     ShiftMask,      "\033[3;2~",    +1,    0},
-	{ XK_KP_Delete,     XK_ANY_MOD,     "\033[P",       -1,    0},
+	{ XK_KP_Delete,     XK_ANY_MOD,     "\033[3~",      -1,    0},
 	{ XK_KP_Delete,     XK_ANY_MOD,     "\033[3~",      +1,    0},
 	{ XK_KP_Multiply,   XK_ANY_MOD,     "\033Oj",       +2,    0},
 	{ XK_KP_Add,        XK_ANY_MOD,     "\033Ok",       +2,    0},
@@ -346,7 +369,7 @@ static Key key[] = {
 	{ XK_Delete,        ControlMask,    "\033[3;5~",    +1,    0},
 	{ XK_Delete,        ShiftMask,      "\033[2K",      -1,    0},
 	{ XK_Delete,        ShiftMask,      "\033[3;2~",    +1,    0},
-	{ XK_Delete,        XK_ANY_MOD,     "\033[P",       -1,    0},
+	{ XK_Delete,        XK_ANY_MOD,     "\033[3~",      -1,    0},
 	{ XK_Delete,        XK_ANY_MOD,     "\033[3~",      +1,    0},
 	{ XK_BackSpace,     XK_NO_MOD,      "\177",          0,    0},
 	{ XK_BackSpace,     Mod1Mask,       "\033\177",      0,    0},

config.mk

@@ -15,10 +15,12 @@ PKG_CONFIG = pkg-config
 # includes and libs
 INCS = -I$(X11INC) \
        `$(PKG_CONFIG) --cflags fontconfig` \
-       `$(PKG_CONFIG) --cflags freetype2`
+       `$(PKG_CONFIG) --cflags freetype2` \
+       `$(PKG_CONFIG) --cflags harfbuzz`
 LIBS = -L$(X11LIB) -lm -lrt -lX11 -lutil -lXft \
        `$(PKG_CONFIG) --libs fontconfig` \
-       `$(PKG_CONFIG) --libs freetype2`
+       `$(PKG_CONFIG) --libs freetype2` \
+       `$(PKG_CONFIG) --libs harfbuzz`
 
 # flags
 STCPPFLAGS = -DVERSION=\"$(VERSION)\" -D_XOPEN_SOURCE=600

hb.c

@@ -0,0 +1,124 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+#include <X11/Xft/Xft.h>
+#include <X11/cursorfont.h>
+#include <hb.h>
+#include <hb-ft.h>
+
+#include "st.h"
+#include "hb.h"
+
+#define FEATURE(c1,c2,c3,c4) { .tag = HB_TAG(c1,c2,c3,c4), .value = 1, .start = HB_FEATURE_GLOBAL_START, .end = HB_FEATURE_GLOBAL_END }
+#define BUFFER_STEP 256
+
+hb_font_t *hbfindfont(XftFont *match);
+
+typedef struct {
+	XftFont *match;
+	hb_font_t *font;
+} HbFontMatch;
+
+typedef struct {
+	size_t capacity;
+	HbFontMatch *fonts;
+} HbFontCache;
+
+static HbFontCache hbfontcache = { 0, NULL };
+
+typedef struct {
+	size_t capacity;
+	Rune *runes;
+} RuneBuffer;
+
+static RuneBuffer hbrunebuffer = { 0, NULL };
+
+/*
+ * Poplulate the array with a list of font features, wrapped in FEATURE macro,
+ * e. g.
+ * FEATURE('c', 'a', 'l', 't'), FEATURE('d', 'l', 'i', 'g')
+ */
+hb_feature_t features[] = { };
+
+void
+hbunloadfonts()
+{
+	for (int i = 0; i < hbfontcache.capacity; i++) {
+		hb_font_destroy(hbfontcache.fonts[i].font);
+		XftUnlockFace(hbfontcache.fonts[i].match);
+	}
+
+	if (hbfontcache.fonts != NULL) {
+		free(hbfontcache.fonts);
+		hbfontcache.fonts = NULL;
+	}
+	hbfontcache.capacity = 0;
+}
+
+hb_font_t *
+hbfindfont(XftFont *match)
+{
+	for (int i = 0; i < hbfontcache.capacity; i++) {
+		if (hbfontcache.fonts[i].match == match)
+			return hbfontcache.fonts[i].font;
+	}
+
+	/* Font not found in cache, caching it now. */
+	hbfontcache.fonts = realloc(hbfontcache.fonts, sizeof(HbFontMatch) * (hbfontcache.capacity + 1));
+	FT_Face face = XftLockFace(match);
+	hb_font_t *font = hb_ft_font_create(face, NULL);
+	if (font == NULL)
+		die("Failed to load Harfbuzz font.");
+
+	hbfontcache.fonts[hbfontcache.capacity].match = match;
+	hbfontcache.fonts[hbfontcache.capacity].font = font;
+	hbfontcache.capacity += 1;
+
+	return font;
+}
+
+void hbtransform(HbTransformData *data, XftFont *xfont, const Glyph *glyphs, int start, int length) {
+	ushort mode = USHRT_MAX;
+	unsigned int glyph_count;
+	int rune_idx, glyph_idx, end = start + length;
+
+	hb_font_t *font = hbfindfont(xfont);
+	if (font == NULL)
+		return;
+
+	hb_buffer_t *buffer = hb_buffer_create();
+	hb_buffer_set_direction(buffer, HB_DIRECTION_LTR);
+
+	/* Resize the buffer if required length is larger. */
+	if (hbrunebuffer.capacity < length) {
+		hbrunebuffer.capacity = (length / BUFFER_STEP + 1) * BUFFER_STEP;
+		hbrunebuffer.runes = realloc(hbrunebuffer.runes, hbrunebuffer.capacity * sizeof(Rune));
+	}
+
+	/* Fill buffer with codepoints. */
+	for (rune_idx = 0, glyph_idx = start; glyph_idx < end; glyph_idx++, rune_idx++) {
+		hbrunebuffer.runes[rune_idx] = glyphs[glyph_idx].u;
+		mode = glyphs[glyph_idx].mode;
+		if (mode & ATTR_WDUMMY)
+			hbrunebuffer.runes[rune_idx] = 0x0020;
+	}
+	hb_buffer_add_codepoints(buffer, hbrunebuffer.runes, length, 0, length);
+
+	/* Shape the segment. */
+	hb_shape(font, buffer, features, sizeof(features)/sizeof(hb_feature_t));
+
+	/* Get new glyph info. */
+	hb_glyph_info_t *info = hb_buffer_get_glyph_infos(buffer, &glyph_count);
+	hb_glyph_position_t *pos = hb_buffer_get_glyph_positions(buffer, &glyph_count);
+
+	/* Fill the output. */
+	data->buffer = buffer;
+	data->glyphs = info;
+	data->positions = pos;
+	data->count = glyph_count;
+}
+
+void hbcleanup(HbTransformData *data) {
+	hb_buffer_destroy(data->buffer);
+	memset(data, 0, sizeof(HbTransformData));
+}

hb.h

@@ -0,0 +1,14 @@
+#include <X11/Xft/Xft.h>
+#include <hb.h>
+#include <hb-ft.h>
+
+typedef struct {
+  hb_buffer_t *buffer;
+  hb_glyph_info_t *glyphs;
+  hb_glyph_position_t *positions;
+  unsigned int count;
+} HbTransformData;
+
+void hbunloadfonts();
+void hbtransform(HbTransformData *, XftFont *, const Glyph *, int, int);
+void hbcleanup(HbTransformData *);

patches/st-anysize-20220718-baa9357.diff

@@ -0,0 +1,164 @@
+From 8dcdc4b21a73268e167d98aa30f24315c7f3b7ff Mon Sep 17 00:00:00 2001
+From: Bakkeby <bakkeby@gmail.com>
+Date: Mon, 18 Jul 2022 16:52:03 +0200
+Subject: [PATCH] Adding anysize patch
+
+---
+ x.c | 56 ++++++++++++++++++++++++++++++--------------------------
+ 1 file changed, 30 insertions(+), 26 deletions(-)
+
+diff --git a/x.c b/x.c
+index 2a3bd38..f534347 100644
+--- a/x.c
++++ b/x.c
+@@ -81,6 +81,7 @@ typedef XftGlyphFontSpec GlyphFontSpec;
+ typedef struct {
+ 	int tw, th; /* tty width and height */
+ 	int w, h; /* window width and height */
++	int hborderpx, vborderpx;
+ 	int ch; /* char height */
+ 	int cw; /* char width  */
+ 	int mode; /* window state/mode flags */
+@@ -331,7 +332,7 @@ ttysend(const Arg *arg)
+ int
+ evcol(XEvent *e)
+ {
+-	int x = e->xbutton.x - borderpx;
++	int x = e->xbutton.x - win.hborderpx;
+ 	LIMIT(x, 0, win.tw - 1);
+ 	return x / win.cw;
+ }
+@@ -339,7 +340,7 @@ evcol(XEvent *e)
+ int
+ evrow(XEvent *e)
+ {
+-	int y = e->xbutton.y - borderpx;
++	int y = e->xbutton.y - win.vborderpx;
+ 	LIMIT(y, 0, win.th - 1);
+ 	return y / win.ch;
+ }
+@@ -739,6 +740,9 @@ cresize(int width, int height)
+ 	col = MAX(1, col);
+ 	row = MAX(1, row);
+ 
++	win.hborderpx = (win.w - col * win.cw) / 2;
++	win.vborderpx = (win.h - row * win.ch) / 2;
++
+ 	tresize(col, row);
+ 	xresize(col, row);
+ 	ttyresize(win.tw, win.th);
+@@ -869,8 +873,8 @@ xhints(void)
+ 	sizeh->flags = PSize | PResizeInc | PBaseSize | PMinSize;
+ 	sizeh->height = win.h;
+ 	sizeh->width = win.w;
+-	sizeh->height_inc = win.ch;
+-	sizeh->width_inc = win.cw;
++	sizeh->height_inc = 1;
++	sizeh->width_inc = 1;
+ 	sizeh->base_height = 2 * borderpx;
+ 	sizeh->base_width = 2 * borderpx;
+ 	sizeh->min_height = win.ch + 2 * borderpx;
+@@ -1152,8 +1156,8 @@ xinit(int cols, int rows)
+ 	xloadcols();
+ 
+ 	/* adjust fixed window geometry */
+-	win.w = 2 * borderpx + cols * win.cw;
+-	win.h = 2 * borderpx + rows * win.ch;
++	win.w = 2 * win.hborderpx + 2 * borderpx + cols * win.cw;
++	win.h = 2 * win.vborderpx + 2 * borderpx + rows * win.ch;
+ 	if (xw.gm & XNegative)
+ 		xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
+ 	if (xw.gm & YNegative)
+@@ -1242,7 +1246,7 @@ xinit(int cols, int rows)
+ int
+ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
+ {
+-	float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
++	float winx = win.hborderpx + x * win.cw, winy = win.vborderpx + y * win.ch, xp, yp;
+ 	ushort mode, prevmode = USHRT_MAX;
+ 	Font *font = &dc.font;
+ 	int frcflags = FRC_NORMAL;
+@@ -1375,7 +1379,7 @@ void
+ xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
+ {
+ 	int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
+-	int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
++	int winx = win.hborderpx + x * win.cw, winy = win.vborderpx + y * win.ch,
+ 	    width = charlen * win.cw;
+ 	Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
+ 	XRenderColor colfg, colbg;
+@@ -1465,17 +1469,17 @@ xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, i
+ 
+ 	/* Intelligent cleaning up of the borders. */
+ 	if (x == 0) {
+-		xclear(0, (y == 0)? 0 : winy, borderpx,
++		xclear(0, (y == 0)? 0 : winy, win.hborderpx,
+ 			winy + win.ch +
+-			((winy + win.ch >= borderpx + win.th)? win.h : 0));
++			((winy + win.ch >= win.vborderpx + win.th)? win.h : 0));
+ 	}
+-	if (winx + width >= borderpx + win.tw) {
++	if (winx + width >= win.hborderpx + win.tw) {
+ 		xclear(winx + width, (y == 0)? 0 : winy, win.w,
+-			((winy + win.ch >= borderpx + win.th)? win.h : (winy + win.ch)));
++			((winy + win.ch >= win.vborderpx + win.th)? win.h : (winy + win.ch)));
+ 	}
+ 	if (y == 0)
+-		xclear(winx, 0, winx + width, borderpx);
+-	if (winy + win.ch >= borderpx + win.th)
++		xclear(winx, 0, winx + width, win.vborderpx);
++	if (winy + win.ch >= win.vborderpx + win.th)
+ 		xclear(winx, winy + win.ch, winx + width, win.h);
+ 
+ 	/* Clean up the region we want to draw to. */
+@@ -1569,35 +1573,35 @@ xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
+ 		case 3: /* Blinking Underline */
+ 		case 4: /* Steady Underline */
+ 			XftDrawRect(xw.draw, &drawcol,
+-					borderpx + cx * win.cw,
+-					borderpx + (cy + 1) * win.ch - \
++					win.hborderpx + cx * win.cw,
++					win.vborderpx + (cy + 1) * win.ch - \
+ 						cursorthickness,
+ 					win.cw, cursorthickness);
+ 			break;
+ 		case 5: /* Blinking bar */
+ 		case 6: /* Steady bar */
+ 			XftDrawRect(xw.draw, &drawcol,
+-					borderpx + cx * win.cw,
+-					borderpx + cy * win.ch,
++					win.hborderpx + cx * win.cw,
++					win.vborderpx + cy * win.ch,
+ 					cursorthickness, win.ch);
+ 			break;
+ 		}
+ 	} else {
+ 		XftDrawRect(xw.draw, &drawcol,
+-				borderpx + cx * win.cw,
+-				borderpx + cy * win.ch,
++				win.hborderpx + cx * win.cw,
++				win.vborderpx + cy * win.ch,
+ 				win.cw - 1, 1);
+ 		XftDrawRect(xw.draw, &drawcol,
+-				borderpx + cx * win.cw,
+-				borderpx + cy * win.ch,
++				win.hborderpx + cx * win.cw,
++				win.vborderpx + cy * win.ch,
+ 				1, win.ch - 1);
+ 		XftDrawRect(xw.draw, &drawcol,
+-				borderpx + (cx + 1) * win.cw - 1,
+-				borderpx + cy * win.ch,
++				win.hborderpx + (cx + 1) * win.cw - 1,
++				win.vborderpx + cy * win.ch,
+ 				1, win.ch - 1);
+ 		XftDrawRect(xw.draw, &drawcol,
+-				borderpx + cx * win.cw,
+-				borderpx + (cy + 1) * win.ch - 1,
++				win.hborderpx + cx * win.cw,
++				win.vborderpx + (cy + 1) * win.ch - 1,
+ 				win.cw, 1);
+ 	}
+ }
+-- 
+2.37.1
+

patches/st-blinking_cursor-20211116-2f6e597.diff

@@ -0,0 +1,153 @@
+From a3cdd0753bf578cd4e6db7c6507481f3b5c38aea Mon Sep 17 00:00:00 2001
+From: Steve Ward <planet36@gmail.com>
+Date: Tue, 16 Nov 2021 14:15:06 -0500
+Subject: [PATCH] Allow blinking cursor
+
+---
+ config.def.h | 19 +++++++++++++------
+ x.c          | 47 +++++++++++++++++++++++++++++++++++------------
+ 2 files changed, 48 insertions(+), 18 deletions(-)
+
+diff --git a/config.def.h b/config.def.h
+index 6f05dce..1a5fed0 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -133,13 +133,20 @@ static unsigned int defaultcs = 256;
+ static unsigned int defaultrcs = 257;
+ 
+ /*
+- * Default shape of cursor
+- * 2: Block ("█")
+- * 4: Underline ("_")
+- * 6: Bar ("|")
+- * 7: Snowman ("☃")
++ * https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h4-Functions-using-CSI-_-ordered-by-the-final-character-lparen-s-rparen:CSI-Ps-SP-q.1D81
++ * Default style of cursor
++ * 0: blinking block
++ * 1: blinking block (default)
++ * 2: steady block ("█")
++ * 3: blinking underline
++ * 4: steady underline ("_")
++ * 5: blinking bar
++ * 6: steady bar ("|")
++ * 7: blinking st cursor
++ * 8: steady st cursor
+  */
+-static unsigned int cursorshape = 2;
++static unsigned int cursorstyle = 1;
++static Rune stcursor = 0x2603; /* snowman ("☃") */
+ 
+ /*
+  * Default columns and rows numbers
+diff --git a/x.c b/x.c
+index 89786b8..7d2447d 100644
+--- a/x.c
++++ b/x.c
+@@ -253,6 +253,7 @@ static char *opt_name  = NULL;
+ static char *opt_title = NULL;
+ 
+ static int oldbutton = 3; /* button event on startup: 3 = release */
++static int cursorblinks = 0;
+ 
+ void
+ clipcopy(const Arg *dummy)
+@@ -1529,29 +1530,44 @@ xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
+ 	/* draw the new one */
+ 	if (IS_SET(MODE_FOCUSED)) {
+ 		switch (win.cursor) {
+-		case 7: /* st extension */
+-			g.u = 0x2603; /* snowman (U+2603) */
++		default:
++		case 0: /* blinking block */
++		case 1: /* blinking block (default) */
++			if (IS_SET(MODE_BLINK))
++				break;
+ 			/* FALLTHROUGH */
+-		case 0: /* Blinking Block */
+-		case 1: /* Blinking Block (Default) */
+-		case 2: /* Steady Block */
++		case 2: /* steady block */
+ 			xdrawglyph(g, cx, cy);
+ 			break;
+-		case 3: /* Blinking Underline */
+-		case 4: /* Steady Underline */
++		case 3: /* blinking underline */
++			if (IS_SET(MODE_BLINK))
++				break;
++			/* FALLTHROUGH */
++		case 4: /* steady underline */
+ 			XftDrawRect(xw.draw, &drawcol,
+ 					borderpx + cx * win.cw,
+ 					borderpx + (cy + 1) * win.ch - \
+ 						cursorthickness,
+ 					win.cw, cursorthickness);
+ 			break;
+-		case 5: /* Blinking bar */
+-		case 6: /* Steady bar */
++		case 5: /* blinking bar */
++			if (IS_SET(MODE_BLINK))
++				break;
++			/* FALLTHROUGH */
++		case 6: /* steady bar */
+ 			XftDrawRect(xw.draw, &drawcol,
+ 					borderpx + cx * win.cw,
+ 					borderpx + cy * win.ch,
+ 					cursorthickness, win.ch);
+ 			break;
++		case 7: /* blinking st cursor */
++			if (IS_SET(MODE_BLINK))
++				break;
++			/* FALLTHROUGH */
++		case 8: /* steady st cursor */
++			g.u = stcursor;
++			xdrawglyph(g, cx, cy);
++			break;
+ 		}
+ 	} else {
+ 		XftDrawRect(xw.draw, &drawcol,
+@@ -1708,9 +1724,12 @@ xsetmode(int set, unsigned int flags)
+ int
+ xsetcursor(int cursor)
+ {
+-	if (!BETWEEN(cursor, 0, 7)) /* 7: st extension */
++	if (!BETWEEN(cursor, 0, 8)) /* 7-8: st extensions */
+ 		return 1;
+ 	win.cursor = cursor;
++	cursorblinks = win.cursor == 0 || win.cursor == 1 ||
++	               win.cursor == 3 || win.cursor == 5 ||
++	               win.cursor == 7;
+ 	return 0;
+ }
+ 
+@@ -1954,6 +1973,10 @@ run(void)
+ 		if (FD_ISSET(ttyfd, &rfd) || xev) {
+ 			if (!drawing) {
+ 				trigger = now;
++				if (IS_SET(MODE_BLINK)) {
++					win.mode ^= MODE_BLINK;
++				}
++				lastblink = now;
+ 				drawing = 1;
+ 			}
+ 			timeout = (maxlatency - TIMEDIFF(now, trigger)) \
+@@ -1964,7 +1987,7 @@ run(void)
+ 
+ 		/* idle detected or maxlatency exhausted -> draw */
+ 		timeout = -1;
+-		if (blinktimeout && tattrset(ATTR_BLINK)) {
++		if (blinktimeout && (cursorblinks || tattrset(ATTR_BLINK))) {
+ 			timeout = blinktimeout - TIMEDIFF(now, lastblink);
+ 			if (timeout <= 0) {
+ 				if (-timeout > blinktimeout) /* start visible */
+@@ -2000,7 +2023,7 @@ main(int argc, char *argv[])
+ {
+ 	xw.l = xw.t = 0;
+ 	xw.isfixed = False;
+-	xsetcursor(cursorshape);
++	xsetcursor(cursorstyle);
+ 
+ 	ARGBEGIN {
+ 	case 'a':
+-- 
+2.34.0
+

patches/st-bold-is-not-bright-20190127-3be4cf1.diff

@@ -0,0 +1,27 @@
+From e8f3c86d93613eef5af187dfd2dba9ae9919a2ee Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rapha=C3=ABl=20Proust?= <code@bnwr.net>
+Date: Sun, 27 Jan 2019 13:31:28 +0800
+Subject: [PATCH] Show bold not as bright
+
+---
+ x.c | 4 ----
+ 1 file changed, 4 deletions(-)
+
+diff --git a/x.c b/x.c
+index 0422421..904e1dc 100644
+--- a/x.c
++++ b/x.c
+@@ -1296,10 +1296,6 @@ xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, i
+ 		bg = &dc.col[base.bg];
+ 	}
+ 
+-	/* Change basic system colors [0-7] to bright system colors [8-15] */
+-	if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
+-		fg = &dc.col[base.fg + 8];
+-
+ 	if (IS_SET(MODE_REVERSE)) {
+ 		if (fg == &dc.col[defaultfg]) {
+ 			fg = &dc.col[defaultbg];
+-- 
+2.20.1
+

patches/st-boxdraw_v2-0.8.5.diff

@@ -0,0 +1,583 @@
+From 46a1124957b8de5e7f827656b64bfc3baeaa097f Mon Sep 17 00:00:00 2001
+From: wael <40663@protonmail.com>
+Date: Mon, 11 Apr 2022 17:04:30 +0300
+Subject: [PATCH] [st][patch][boxdraw] update to 0.8.5
+
+---
+ Makefile       |   3 +-
+ boxdraw.c      | 194 ++++++++++++++++++++++++++++++++++++++++++++
+ boxdraw_data.h | 214 +++++++++++++++++++++++++++++++++++++++++++++++++
+ config.def.h   |  12 +++
+ st.c           |   3 +
+ st.h           |  10 +++
+ x.c            |  21 +++--
+ 7 files changed, 451 insertions(+), 6 deletions(-)
+ create mode 100644 boxdraw.c
+ create mode 100644 boxdraw_data.h
+
+diff --git a/Makefile b/Makefile
+index 470ac86..6dfa212 100644
+--- a/Makefile
++++ b/Makefile
+@@ -4,7 +4,7 @@
+ 
+ include config.mk
+ 
+-SRC = st.c x.c
++SRC = st.c x.c boxdraw.c
+ OBJ = $(SRC:.c=.o)
+ 
+ all: options st
+@@ -23,6 +23,7 @@ config.h:
+ 
+ st.o: config.h st.h win.h
+ x.o: arg.h config.h st.h win.h
++boxdraw.o: config.h st.h boxdraw_data.h
+ 
+ $(OBJ): config.h config.mk
+ 
+diff --git a/boxdraw.c b/boxdraw.c
+new file mode 100644
+index 0000000..28a92d0
+--- /dev/null
++++ b/boxdraw.c
+@@ -0,0 +1,194 @@
++/*
++ * Copyright 2018 Avi Halachmi (:avih) avihpit@yahoo.com https://github.com/avih
++ * MIT/X Consortium License
++ */
++
++#include <X11/Xft/Xft.h>
++#include "st.h"
++#include "boxdraw_data.h"
++
++/* Rounded non-negative integers division of n / d  */
++#define DIV(n, d) (((n) + (d) / 2) / (d))
++
++static Display *xdpy;
++static Colormap xcmap;
++static XftDraw *xd;
++static Visual *xvis;
++
++static void drawbox(int, int, int, int, XftColor *, XftColor *, ushort);
++static void drawboxlines(int, int, int, int, XftColor *, ushort);
++
++/* public API */
++
++void
++boxdraw_xinit(Display *dpy, Colormap cmap, XftDraw *draw, Visual *vis)
++{
++	xdpy = dpy; xcmap = cmap; xd = draw, xvis = vis;
++}
++
++int
++isboxdraw(Rune u)
++{
++	Rune block = u & ~0xff;
++	return (boxdraw && block == 0x2500 && boxdata[(uint8_t)u]) ||
++	       (boxdraw_braille && block == 0x2800);
++}
++
++/* the "index" is actually the entire shape data encoded as ushort */
++ushort
++boxdrawindex(const Glyph *g)
++{
++	if (boxdraw_braille && (g->u & ~0xff) == 0x2800)
++		return BRL | (uint8_t)g->u;
++	if (boxdraw_bold && (g->mode & ATTR_BOLD))
++		return BDB | boxdata[(uint8_t)g->u];
++	return boxdata[(uint8_t)g->u];
++}
++
++void
++drawboxes(int x, int y, int cw, int ch, XftColor *fg, XftColor *bg,
++          const XftGlyphFontSpec *specs, int len)
++{
++	for ( ; len-- > 0; x += cw, specs++)
++		drawbox(x, y, cw, ch, fg, bg, (ushort)specs->glyph);
++}
++
++/* implementation */
++
++void
++drawbox(int x, int y, int w, int h, XftColor *fg, XftColor *bg, ushort bd)
++{
++	ushort cat = bd & ~(BDB | 0xff);  /* mask out bold and data */
++	if (bd & (BDL | BDA)) {
++		/* lines (light/double/heavy/arcs) */
++		drawboxlines(x, y, w, h, fg, bd);
++
++	} else if (cat == BBD) {
++		/* lower (8-X)/8 block */
++		int d = DIV((uint8_t)bd * h, 8);
++		XftDrawRect(xd, fg, x, y + d, w, h - d);
++
++	} else if (cat == BBU) {
++		/* upper X/8 block */
++		XftDrawRect(xd, fg, x, y, w, DIV((uint8_t)bd * h, 8));
++
++	} else if (cat == BBL) {
++		/* left X/8 block */
++		XftDrawRect(xd, fg, x, y, DIV((uint8_t)bd * w, 8), h);
++
++	} else if (cat == BBR) {
++		/* right (8-X)/8 block */
++		int d = DIV((uint8_t)bd * w, 8);
++		XftDrawRect(xd, fg, x + d, y, w - d, h);
++
++	} else if (cat == BBQ) {
++		/* Quadrants */
++		int w2 = DIV(w, 2), h2 = DIV(h, 2);
++		if (bd & TL)
++			XftDrawRect(xd, fg, x, y, w2, h2);
++		if (bd & TR)
++			XftDrawRect(xd, fg, x + w2, y, w - w2, h2);
++		if (bd & BL)
++			XftDrawRect(xd, fg, x, y + h2, w2, h - h2);
++		if (bd & BR)
++			XftDrawRect(xd, fg, x + w2, y + h2, w - w2, h - h2);
++
++	} else if (bd & BBS) {
++		/* Shades - data is 1/2/3 for 25%/50%/75% alpha, respectively */
++		int d = (uint8_t)bd;
++		XftColor xfc;
++		XRenderColor xrc = { .alpha = 0xffff };
++
++		xrc.red = DIV(fg->color.red * d + bg->color.red * (4 - d), 4);
++		xrc.green = DIV(fg->color.green * d + bg->color.green * (4 - d), 4);
++		xrc.blue = DIV(fg->color.blue * d + bg->color.blue * (4 - d), 4);
++
++		XftColorAllocValue(xdpy, xvis, xcmap, &xrc, &xfc);
++		XftDrawRect(xd, &xfc, x, y, w, h);
++		XftColorFree(xdpy, xvis, xcmap, &xfc);
++
++	} else if (cat == BRL) {
++		/* braille, each data bit corresponds to one dot at 2x4 grid */
++		int w1 = DIV(w, 2);
++		int h1 = DIV(h, 4), h2 = DIV(h, 2), h3 = DIV(3 * h, 4);
++
++		if (bd & 1)   XftDrawRect(xd, fg, x, y, w1, h1);
++		if (bd & 2)   XftDrawRect(xd, fg, x, y + h1, w1, h2 - h1);
++		if (bd & 4)   XftDrawRect(xd, fg, x, y + h2, w1, h3 - h2);
++		if (bd & 8)   XftDrawRect(xd, fg, x + w1, y, w - w1, h1);
++		if (bd & 16)  XftDrawRect(xd, fg, x + w1, y + h1, w - w1, h2 - h1);
++		if (bd & 32)  XftDrawRect(xd, fg, x + w1, y + h2, w - w1, h3 - h2);
++		if (bd & 64)  XftDrawRect(xd, fg, x, y + h3, w1, h - h3);
++		if (bd & 128) XftDrawRect(xd, fg, x + w1, y + h3, w - w1, h - h3);
++
++	}
++}
++
++void
++drawboxlines(int x, int y, int w, int h, XftColor *fg, ushort bd)
++{
++	/* s: stem thickness. width/8 roughly matches underscore thickness. */
++	/* We draw bold as 1.5 * normal-stem and at least 1px thicker.      */
++	/* doubles draw at least 3px, even when w or h < 3. bold needs 6px. */
++	int mwh = MIN(w, h);
++	int base_s = MAX(1, DIV(mwh, 8));
++	int bold = (bd & BDB) && mwh >= 6;  /* possibly ignore boldness */
++	int s = bold ? MAX(base_s + 1, DIV(3 * base_s, 2)) : base_s;
++	int w2 = DIV(w - s, 2), h2 = DIV(h - s, 2);
++	/* the s-by-s square (x + w2, y + h2, s, s) is the center texel.    */
++	/* The base length (per direction till edge) includes this square.  */
++
++	int light = bd & (LL | LU | LR | LD);
++	int double_ = bd & (DL | DU | DR | DD);
++
++	if (light) {
++		/* d: additional (negative) length to not-draw the center   */
++		/* texel - at arcs and avoid drawing inside (some) doubles  */
++		int arc = bd & BDA;
++		int multi_light = light & (light - 1);
++		int multi_double = double_ & (double_ - 1);
++		/* light crosses double only at DH+LV, DV+LH (ref. shapes)  */
++		int d = arc || (multi_double && !multi_light) ? -s : 0;
++
++		if (bd & LL)
++			XftDrawRect(xd, fg, x, y + h2, w2 + s + d, s);
++		if (bd & LU)
++			XftDrawRect(xd, fg, x + w2, y, s, h2 + s + d);
++		if (bd & LR)
++			XftDrawRect(xd, fg, x + w2 - d, y + h2, w - w2 + d, s);
++		if (bd & LD)
++			XftDrawRect(xd, fg, x + w2, y + h2 - d, s, h - h2 + d);
++	}
++
++	/* double lines - also align with light to form heavy when combined */
++	if (double_) {
++		/*
++		* going clockwise, for each double-ray: p is additional length
++		* to the single-ray nearer to the previous direction, and n to
++		* the next. p and n adjust from the base length to lengths
++		* which consider other doubles - shorter to avoid intersections
++		* (p, n), or longer to draw the far-corner texel (n).
++		*/
++		int dl = bd & DL, du = bd & DU, dr = bd & DR, dd = bd & DD;
++		if (dl) {
++			int p = dd ? -s : 0, n = du ? -s : dd ? s : 0;
++			XftDrawRect(xd, fg, x, y + h2 + s, w2 + s + p, s);
++			XftDrawRect(xd, fg, x, y + h2 - s, w2 + s + n, s);
++		}
++		if (du) {
++			int p = dl ? -s : 0, n = dr ? -s : dl ? s : 0;
++			XftDrawRect(xd, fg, x + w2 - s, y, s, h2 + s + p);
++			XftDrawRect(xd, fg, x + w2 + s, y, s, h2 + s + n);
++		}
++		if (dr) {
++			int p = du ? -s : 0, n = dd ? -s : du ? s : 0;
++			XftDrawRect(xd, fg, x + w2 - p, y + h2 - s, w - w2 + p, s);
++			XftDrawRect(xd, fg, x + w2 - n, y + h2 + s, w - w2 + n, s);
++		}
++		if (dd) {
++			int p = dr ? -s : 0, n = dl ? -s : dr ? s : 0;
++			XftDrawRect(xd, fg, x + w2 + s, y + h2 - p, s, h - h2 + p);
++			XftDrawRect(xd, fg, x + w2 - s, y + h2 - n, s, h - h2 + n);
++		}
++	}
++}
+diff --git a/boxdraw_data.h b/boxdraw_data.h
+new file mode 100644
+index 0000000..7890500
+--- /dev/null
++++ b/boxdraw_data.h
+@@ -0,0 +1,214 @@
++/*
++ * Copyright 2018 Avi Halachmi (:avih) avihpit@yahoo.com https://github.com/avih
++ * MIT/X Consortium License
++ */
++
++/*
++ * U+25XX codepoints data
++ *
++ * References:
++ *   http://www.unicode.org/charts/PDF/U2500.pdf
++ *   http://www.unicode.org/charts/PDF/U2580.pdf
++ *
++ * Test page:
++ *   https://github.com/GNOME/vte/blob/master/doc/boxes.txt
++ */
++
++/* Each shape is encoded as 16-bits. Higher bits are category, lower are data */
++/* Categories (mutually exclusive except BDB): */
++/* For convenience, BDL/BDA/BBS/BDB are 1 bit each, the rest are enums */
++#define BDL (1<<8)   /* Box Draw Lines (light/double/heavy) */
++#define BDA (1<<9)   /* Box Draw Arc (light) */
++
++#define BBD (1<<10)  /* Box Block Down (lower) X/8 */
++#define BBL (2<<10)  /* Box Block Left X/8 */
++#define BBU (3<<10)  /* Box Block Upper X/8 */
++#define BBR (4<<10)  /* Box Block Right X/8 */
++#define BBQ (5<<10)  /* Box Block Quadrants */
++#define BRL (6<<10)  /* Box Braille (data is lower byte of U28XX) */
++
++#define BBS (1<<14)  /* Box Block Shades */
++#define BDB (1<<15)  /* Box Draw is Bold */
++
++/* (BDL/BDA) Light/Double/Heavy x Left/Up/Right/Down/Horizontal/Vertical      */
++/* Heavy is light+double (literally drawing light+double align to form heavy) */
++#define LL (1<<0)
++#define LU (1<<1)
++#define LR (1<<2)
++#define LD (1<<3)
++#define LH (LL+LR)
++#define LV (LU+LD)
++
++#define DL (1<<4)
++#define DU (1<<5)
++#define DR (1<<6)
++#define DD (1<<7)
++#define DH (DL+DR)
++#define DV (DU+DD)
++
++#define HL (LL+DL)
++#define HU (LU+DU)
++#define HR (LR+DR)
++#define HD (LD+DD)
++#define HH (HL+HR)
++#define HV (HU+HD)
++
++/* (BBQ) Quadrants Top/Bottom x Left/Right */
++#define TL (1<<0)
++#define TR (1<<1)
++#define BL (1<<2)
++#define BR (1<<3)
++
++/* Data for U+2500 - U+259F except dashes/diagonals */
++static const unsigned short boxdata[256] = {
++	/* light lines */
++	[0x00] = BDL + LH,       /* light horizontal */
++	[0x02] = BDL + LV,       /* light vertical */
++	[0x0c] = BDL + LD + LR,  /* light down and right */
++	[0x10] = BDL + LD + LL,  /* light down and left */
++	[0x14] = BDL + LU + LR,  /* light up and right */
++	[0x18] = BDL + LU + LL,  /* light up and left */
++	[0x1c] = BDL + LV + LR,  /* light vertical and right */
++	[0x24] = BDL + LV + LL,  /* light vertical and left */
++	[0x2c] = BDL + LH + LD,  /* light horizontal and down */
++	[0x34] = BDL + LH + LU,  /* light horizontal and up */
++	[0x3c] = BDL + LV + LH,  /* light vertical and horizontal */
++	[0x74] = BDL + LL,       /* light left */
++	[0x75] = BDL + LU,       /* light up */
++	[0x76] = BDL + LR,       /* light right */
++	[0x77] = BDL + LD,       /* light down */
++
++	/* heavy [+light] lines */
++	[0x01] = BDL + HH,
++	[0x03] = BDL + HV,
++	[0x0d] = BDL + HR + LD,
++	[0x0e] = BDL + HD + LR,
++	[0x0f] = BDL + HD + HR,
++	[0x11] = BDL + HL + LD,
++	[0x12] = BDL + HD + LL,
++	[0x13] = BDL + HD + HL,
++	[0x15] = BDL + HR + LU,
++	[0x16] = BDL + HU + LR,
++	[0x17] = BDL + HU + HR,
++	[0x19] = BDL + HL + LU,
++	[0x1a] = BDL + HU + LL,
++	[0x1b] = BDL + HU + HL,
++	[0x1d] = BDL + HR + LV,
++	[0x1e] = BDL + HU + LD + LR,
++	[0x1f] = BDL + HD + LR + LU,
++	[0x20] = BDL + HV + LR,
++	[0x21] = BDL + HU + HR + LD,
++	[0x22] = BDL + HD + HR + LU,
++	[0x23] = BDL + HV + HR,
++	[0x25] = BDL + HL + LV,
++	[0x26] = BDL + HU + LD + LL,
++	[0x27] = BDL + HD + LU + LL,
++	[0x28] = BDL + HV + LL,
++	[0x29] = BDL + HU + HL + LD,
++	[0x2a] = BDL + HD + HL + LU,
++	[0x2b] = BDL + HV + HL,
++	[0x2d] = BDL + HL + LD + LR,
++	[0x2e] = BDL + HR + LL + LD,
++	[0x2f] = BDL + HH + LD,
++	[0x30] = BDL + HD + LH,
++	[0x31] = BDL + HD + HL + LR,
++	[0x32] = BDL + HR + HD + LL,
++	[0x33] = BDL + HH + HD,
++	[0x35] = BDL + HL + LU + LR,
++	[0x36] = BDL + HR + LU + LL,
++	[0x37] = BDL + HH + LU,
++	[0x38] = BDL + HU + LH,
++	[0x39] = BDL + HU + HL + LR,
++	[0x3a] = BDL + HU + HR + LL,
++	[0x3b] = BDL + HH + HU,
++	[0x3d] = BDL + HL + LV + LR,
++	[0x3e] = BDL + HR + LV + LL,
++	[0x3f] = BDL + HH + LV,
++	[0x40] = BDL + HU + LH + LD,
++	[0x41] = BDL + HD + LH + LU,
++	[0x42] = BDL + HV + LH,
++	[0x43] = BDL + HU + HL + LD + LR,
++	[0x44] = BDL + HU + HR + LD + LL,
++	[0x45] = BDL + HD + HL + LU + LR,
++	[0x46] = BDL + HD + HR + LU + LL,
++	[0x47] = BDL + HH + HU + LD,
++	[0x48] = BDL + HH + HD + LU,
++	[0x49] = BDL + HV + HL + LR,
++	[0x4a] = BDL + HV + HR + LL,
++	[0x4b] = BDL + HV + HH,
++	[0x78] = BDL + HL,
++	[0x79] = BDL + HU,
++	[0x7a] = BDL + HR,
++	[0x7b] = BDL + HD,
++	[0x7c] = BDL + HR + LL,
++	[0x7d] = BDL + HD + LU,
++	[0x7e] = BDL + HL + LR,
++	[0x7f] = BDL + HU + LD,
++
++	/* double [+light] lines */
++	[0x50] = BDL + DH,
++	[0x51] = BDL + DV,
++	[0x52] = BDL + DR + LD,
++	[0x53] = BDL + DD + LR,
++	[0x54] = BDL + DR + DD,
++	[0x55] = BDL + DL + LD,
++	[0x56] = BDL + DD + LL,
++	[0x57] = BDL + DL + DD,
++	[0x58] = BDL + DR + LU,
++	[0x59] = BDL + DU + LR,
++	[0x5a] = BDL + DU + DR,
++	[0x5b] = BDL + DL + LU,
++	[0x5c] = BDL + DU + LL,
++	[0x5d] = BDL + DL + DU,
++	[0x5e] = BDL + DR + LV,
++	[0x5f] = BDL + DV + LR,
++	[0x60] = BDL + DV + DR,
++	[0x61] = BDL + DL + LV,
++	[0x62] = BDL + DV + LL,
++	[0x63] = BDL + DV + DL,
++	[0x64] = BDL + DH + LD,
++	[0x65] = BDL + DD + LH,
++	[0x66] = BDL + DD + DH,
++	[0x67] = BDL + DH + LU,
++	[0x68] = BDL + DU + LH,
++	[0x69] = BDL + DH + DU,
++	[0x6a] = BDL + DH + LV,
++	[0x6b] = BDL + DV + LH,
++	[0x6c] = BDL + DH + DV,
++
++	/* (light) arcs */
++	[0x6d] = BDA + LD + LR,
++	[0x6e] = BDA + LD + LL,
++	[0x6f] = BDA + LU + LL,
++	[0x70] = BDA + LU + LR,
++
++	/* Lower (Down) X/8 block (data is 8 - X) */
++	[0x81] = BBD + 7, [0x82] = BBD + 6, [0x83] = BBD + 5, [0x84] = BBD + 4,
++	[0x85] = BBD + 3, [0x86] = BBD + 2, [0x87] = BBD + 1, [0x88] = BBD + 0,
++
++	/* Left X/8 block (data is X) */
++	[0x89] = BBL + 7, [0x8a] = BBL + 6, [0x8b] = BBL + 5, [0x8c] = BBL + 4,
++	[0x8d] = BBL + 3, [0x8e] = BBL + 2, [0x8f] = BBL + 1,
++
++	/* upper 1/2 (4/8), 1/8 block (X), right 1/2, 1/8 block (8-X) */
++	[0x80] = BBU + 4, [0x94] = BBU + 1,
++	[0x90] = BBR + 4, [0x95] = BBR + 7,
++
++	/* Quadrants */
++	[0x96] = BBQ + BL,
++	[0x97] = BBQ + BR,
++	[0x98] = BBQ + TL,
++	[0x99] = BBQ + TL + BL + BR,
++	[0x9a] = BBQ + TL + BR,
++	[0x9b] = BBQ + TL + TR + BL,
++	[0x9c] = BBQ + TL + TR + BR,
++	[0x9d] = BBQ + TR,
++	[0x9e] = BBQ + BL + TR,
++	[0x9f] = BBQ + BL + TR + BR,
++
++	/* Shades, data is an alpha value in 25% units (1/4, 1/2, 3/4) */
++	[0x91] = BBS + 1, [0x92] = BBS + 2, [0x93] = BBS + 3,
++
++	/* U+2504 - U+250B, U+254C - U+254F: unsupported (dashes) */
++	/* U+2571 - U+2573: unsupported (diagonals) */
++};
+diff --git a/config.def.h b/config.def.h
+index 91ab8ca..7bb3ff7 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -67,6 +67,18 @@ static unsigned int blinktimeout = 800;
+  */
+ static unsigned int cursorthickness = 2;
+ 
++/*
++ * 1: render most of the lines/blocks characters without using the font for
++ *    perfect alignment between cells (U2500 - U259F except dashes/diagonals).
++ *    Bold affects lines thickness if boxdraw_bold is not 0. Italic is ignored.
++ * 0: disable (render all U25XX glyphs normally from the font).
++ */
++const int boxdraw = 0;
++const int boxdraw_bold = 0;
++
++/* braille (U28XX):  1: render as adjacent "pixels",  0: use font */
++const int boxdraw_braille = 0;
++
+ /*
+  * bell volume. It must be a value between -100 and 100. Use 0 for disabling
+  * it
+diff --git a/st.c b/st.c
+index f43cfd3..baa2bed 100644
+--- a/st.c
++++ b/st.c
+@@ -1214,6 +1214,9 @@ tsetchar(Rune u, const Glyph *attr, int x, int y)
+ 	term.dirty[y] = 1;
+ 	term.line[y][x] = *attr;
+ 	term.line[y][x].u = u;
++
++	if (isboxdraw(u))
++		term.line[y][x].mode |= ATTR_BOXDRAW;
+ }
+ 
+ void
+diff --git a/st.h b/st.h
+index 519b9bd..07a7c66 100644
+--- a/st.h
++++ b/st.h
+@@ -33,6 +33,7 @@ enum glyph_attribute {
+ 	ATTR_WRAP       = 1 << 8,
+ 	ATTR_WIDE       = 1 << 9,
+ 	ATTR_WDUMMY     = 1 << 10,
++	ATTR_BOXDRAW    = 1 << 11,
+ 	ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
+ };
+ 
+@@ -113,6 +114,14 @@ char *xstrdup(const char *);
+ 
+ int xgetcolor(int x, unsigned char *r, unsigned char *g, unsigned char *b);
+ 
++int isboxdraw(Rune);
++ushort boxdrawindex(const Glyph *);
++#ifdef XFT_VERSION
++/* only exposed to x.c, otherwise we'll need Xft.h for the types */
++void boxdraw_xinit(Display *, Colormap, XftDraw *, Visual *);
++void drawboxes(int, int, int, int, XftColor *, XftColor *, const XftGlyphFontSpec *, int);
++#endif
++
+ /* config.h globals */
+ extern char *utmp;
+ extern char *scroll;
+@@ -126,3 +135,4 @@ extern unsigned int tabspaces;
+ extern unsigned int defaultfg;
+ extern unsigned int defaultbg;
+ extern unsigned int defaultcs;
++extern const int boxdraw, boxdraw_bold, boxdraw_braille;
+diff --git a/x.c b/x.c
+index 2a3bd38..bf6bbf9 100644
+--- a/x.c
++++ b/x.c
+@@ -1237,6 +1237,8 @@ xinit(int cols, int rows)
+ 	xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
+ 	if (xsel.xtarget == None)
+ 		xsel.xtarget = XA_STRING;
++
++	boxdraw_xinit(xw.dpy, xw.cmap, xw.draw, xw.vis);
+ }
+ 
+ int
+@@ -1283,8 +1285,13 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x
+ 			yp = winy + font->ascent;
+ 		}
+ 
+-		/* Lookup character index with default font. */
+-		glyphidx = XftCharIndex(xw.dpy, font->match, rune);
++		if (mode & ATTR_BOXDRAW) {
++			/* minor shoehorning: boxdraw uses only this ushort */
++			glyphidx = boxdrawindex(&glyphs[i]);
++		} else {
++			/* Lookup character index with default font. */
++			glyphidx = XftCharIndex(xw.dpy, font->match, rune);
++		}
+ 		if (glyphidx) {
+ 			specs[numspecs].font = font->match;
+ 			specs[numspecs].glyph = glyphidx;
+@@ -1488,8 +1495,12 @@ xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, i
+ 	r.width = width;
+ 	XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
+ 
+-	/* Render the glyphs. */
+-	XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
++	if (base.mode & ATTR_BOXDRAW) {
++		drawboxes(winx, winy, width / len, win.ch, fg, bg, specs, len);
++	} else {
++		/* Render the glyphs. */
++		XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
++	}
+ 
+ 	/* Render underline and strikethrough. */
+ 	if (base.mode & ATTR_UNDERLINE) {
+@@ -1532,7 +1543,7 @@ xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
+ 	/*
+ 	 * Select the right color for the right mode.
+ 	 */
+-	g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE;
++	g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE|ATTR_BOXDRAW;
+ 
+ 	if (IS_SET(MODE_REVERSE)) {
+ 		g.mode |= ATTR_REVERSE;
+-- 
+2.35.1
+

patches/st-csi_22_23-0.8.5.diff

@@ -0,0 +1,208 @@
+From c90af45228c1100377d64ad021fa3f0cff9a1df4 Mon Sep 17 00:00:00 2001
+From: wael <40663@protonmail.com>
+Date: Mon, 11 Apr 2022 21:28:43 +0300
+Subject: [PATCH] [st][patch][csi 22 23] update to 0.8.5
+
+---
+ st.c    | 36 ++++++++++++++++++++++++++++++++----
+ st.info |  4 ++--
+ win.h   |  4 +++-
+ x.c     | 41 ++++++++++++++++++++++++++++++++++++++---
+ 4 files changed, 75 insertions(+), 10 deletions(-)
+
+diff --git a/st.c b/st.c
+index f43cfd3..2802381 100644
+--- a/st.c
++++ b/st.c
+@@ -1801,6 +1801,33 @@ csihandle(void)
+ 			goto unknown;
+ 		}
+ 		break;
++	case 't': /* title stack operations */
++		switch (csiescseq.arg[0]) {
++		case 22: /* pust current title on stack */
++			switch (csiescseq.arg[1]) {
++			case 0:
++			case 1:
++			case 2:
++				xpushtitle();
++				break;
++			default:
++				goto unknown;
++			}
++			break;
++		case 23: /* pop last title from stack */
++			switch (csiescseq.arg[1]) {
++			case 0:
++			case 1:
++			case 2:
++				xsettitle(NULL, 1);
++				break;
++			default:
++				goto unknown;
++			}
++			break;
++		default:
++			goto unknown;
++		}
+ 	}
+ }
+ 
+@@ -1885,7 +1912,7 @@ strhandle(void)
+ 		switch (par) {
+ 		case 0:
+ 			if (narg > 1) {
+-				xsettitle(strescseq.args[1]);
++				xsettitle(strescseq.args[1], 0);
+ 				xseticontitle(strescseq.args[1]);
+ 			}
+ 			return;
+@@ -1895,7 +1922,7 @@ strhandle(void)
+ 			return;
+ 		case 2:
+ 			if (narg > 1)
+-				xsettitle(strescseq.args[1]);
++				xsettitle(strescseq.args[1], 0);
+ 			return;
+ 		case 52:
+ 			if (narg > 2 && allowwindowops) {
+@@ -1973,7 +2000,7 @@ strhandle(void)
+ 		}
+ 		break;
+ 	case 'k': /* old title set compatibility */
+-		xsettitle(strescseq.args[0]);
++		xsettitle(strescseq.args[0], 0);
+ 		return;
+ 	case 'P': /* DCS -- Device Control String */
+ 	case '_': /* APC -- Application Program Command */
+@@ -2345,6 +2372,7 @@ eschandle(uchar ascii)
+ 		break;
+ 	case 'c': /* RIS -- Reset to initial state */
+ 		treset();
++		xfreetitlestack();
+ 		resettitle();
+ 		xloadcols();
+ 		break;
+@@ -2631,7 +2659,7 @@ tresize(int col, int row)
+ void
+ resettitle(void)
+ {
+-	xsettitle(NULL);
++	xsettitle(NULL, 0);
+ }
+ 
+ void
+diff --git a/st.info b/st.info
+index 8201ad6..aeef606 100644
+--- a/st.info
++++ b/st.info
+@@ -161,7 +161,7 @@ st-mono| simpleterm monocolor,
+ 	rin=\E[%p1%dT,
+ 	ritm=\E[23m,
+ 	rmacs=\E(B,
+-	rmcup=\E[?1049l,
++	rmcup=\E[?1049l\E[23;0;0t,
+ 	rmir=\E[4l,
+ 	rmkx=\E[?1l\E>,
+ 	rmso=\E[27m,
+@@ -172,7 +172,7 @@ st-mono| simpleterm monocolor,
+ 	sitm=\E[3m,
+ 	sgr0=\E[0m,
+ 	smacs=\E(0,
+-	smcup=\E[?1049h,
++	smcup=\E[?1049h\E[22;0;0t,
+ 	smir=\E[4h,
+ 	smkx=\E[?1h\E=,
+ 	smso=\E[7m,
+diff --git a/win.h b/win.h
+index e6e4369..ef67fd6 100644
+--- a/win.h
++++ b/win.h
+@@ -31,7 +31,9 @@ void xfinishdraw(void);
+ void xloadcols(void);
+ int xsetcolorname(int, const char *);
+ void xseticontitle(char *);
+-void xsettitle(char *);
++void xfreetitlestack(void);
++void xsettitle(char *, int);
++void xpushtitle(void);
+ int xsetcursor(int);
+ void xsetmode(int, unsigned int);
+ void xsetpointermotion(int);
+diff --git a/x.c b/x.c
+index 2a3bd38..babb04c 100644
+--- a/x.c
++++ b/x.c
+@@ -63,6 +63,9 @@ static void ttysend(const Arg *);
+ /* config.h for applying patches and the configuration. */
+ #include "config.h"
+ 
++/* size of title stack */
++#define TITLESTACKSIZE 8
++
+ /* XEMBED messages */
+ #define XEMBED_FOCUS_IN  4
+ #define XEMBED_FOCUS_OUT 5
+@@ -220,6 +223,8 @@ static DC dc;
+ static XWindow xw;
+ static XSelection xsel;
+ static TermWindow win;
++static int tstki; /* title stack index */
++static char *titlestack[TITLESTACKSIZE]; /* title stack */
+ 
+ /* Font Ring Cache */
+ enum {
+@@ -1626,10 +1631,30 @@ xseticontitle(char *p)
+ }
+ 
+ void
+-xsettitle(char *p)
++xfreetitlestack(void)
+ {
+-	XTextProperty prop;
+-	DEFAULT(p, opt_title);
++	for (int i = 0; i < LEN(titlestack); i++) {
++		free(titlestack[i]);
++		titlestack[i] = NULL;
++	}
++}
++
++void
++xsettitle(char *p, int pop)
++{
++ 	XTextProperty prop;
++ 
++	free(titlestack[tstki]);
++	if (pop) {
++		titlestack[tstki] = NULL;
++		tstki = (tstki - 1 + TITLESTACKSIZE) % TITLESTACKSIZE;
++		p = titlestack[tstki] ? titlestack[tstki] : opt_title;
++	} else if (p) {
++		titlestack[tstki] = xstrdup(p);
++	} else {
++		titlestack[tstki] = NULL;
++		p = opt_title;
++	}
+ 
+ 	if (Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
+ 	                                &prop) != Success)
+@@ -1639,6 +1664,16 @@ xsettitle(char *p)
+ 	XFree(prop.value);
+ }
+ 
++void
++xpushtitle(void)
++{
++	int tstkin = (tstki + 1) % TITLESTACKSIZE;
++
++	free(titlestack[tstkin]);
++	titlestack[tstkin] = titlestack[tstki] ? xstrdup(titlestack[tstki]) : NULL;
++	tstki = tstkin;
++}
++
+ int
+ xstartdraw(void)
+ {
+-- 
+2.35.1
+

patches/st-ligatures-boxdraw-20230105-0.9.diff

@@ -0,0 +1,624 @@
+diff --git a/Makefile b/Makefile
+index 6dfa212..adfa07a 100644
+--- a/Makefile
++++ b/Makefile
+@@ -4,7 +4,7 @@
+ 
+ include config.mk
+ 
+-SRC = st.c x.c boxdraw.c
++SRC = st.c x.c boxdraw.c hb.c
+ OBJ = $(SRC:.c=.o)
+ 
+ all: options st
+@@ -22,8 +22,9 @@ config.h:
+ 	$(CC) $(STCFLAGS) -c $<
+ 
+ st.o: config.h st.h win.h
+-x.o: arg.h config.h st.h win.h
++x.o: arg.h config.h st.h win.h hb.h
+ boxdraw.o: config.h st.h boxdraw_data.h
++hb.o: st.h
+ 
+ $(OBJ): config.h config.mk
+ 
+diff --git a/config.mk b/config.mk
+index 1e306f8..3e13e53 100644
+--- a/config.mk
++++ b/config.mk
+@@ -15,10 +15,12 @@ PKG_CONFIG = pkg-config
+ # includes and libs
+ INCS = -I$(X11INC) \
+        `$(PKG_CONFIG) --cflags fontconfig` \
+-       `$(PKG_CONFIG) --cflags freetype2`
++       `$(PKG_CONFIG) --cflags freetype2` \
++       `$(PKG_CONFIG) --cflags harfbuzz`
+ LIBS = -L$(X11LIB) -lm -lrt -lX11 -lutil -lXft \
+        `$(PKG_CONFIG) --libs fontconfig` \
+-       `$(PKG_CONFIG) --libs freetype2`
++       `$(PKG_CONFIG) --libs freetype2` \
++       `$(PKG_CONFIG) --libs harfbuzz`
+ 
+ # flags
+ STCPPFLAGS = -DVERSION=\"$(VERSION)\" -D_XOPEN_SOURCE=600
+diff --git a/hb.c b/hb.c
+new file mode 100644
+index 0000000..528c040
+--- /dev/null
++++ b/hb.c
+@@ -0,0 +1,124 @@
++#include <stdlib.h>
++#include <stdio.h>
++#include <math.h>
++#include <X11/Xft/Xft.h>
++#include <X11/cursorfont.h>
++#include <hb.h>
++#include <hb-ft.h>
++
++#include "st.h"
++#include "hb.h"
++
++#define FEATURE(c1,c2,c3,c4) { .tag = HB_TAG(c1,c2,c3,c4), .value = 1, .start = HB_FEATURE_GLOBAL_START, .end = HB_FEATURE_GLOBAL_END }
++#define BUFFER_STEP 256
++
++hb_font_t *hbfindfont(XftFont *match);
++
++typedef struct {
++	XftFont *match;
++	hb_font_t *font;
++} HbFontMatch;
++
++typedef struct {
++	size_t capacity;
++	HbFontMatch *fonts;
++} HbFontCache;
++
++static HbFontCache hbfontcache = { 0, NULL };
++
++typedef struct {
++	size_t capacity;
++	Rune *runes;
++} RuneBuffer;
++
++static RuneBuffer hbrunebuffer = { 0, NULL };
++
++/*
++ * Poplulate the array with a list of font features, wrapped in FEATURE macro,
++ * e. g.
++ * FEATURE('c', 'a', 'l', 't'), FEATURE('d', 'l', 'i', 'g')
++ */
++hb_feature_t features[] = { };
++
++void
++hbunloadfonts()
++{
++	for (int i = 0; i < hbfontcache.capacity; i++) {
++		hb_font_destroy(hbfontcache.fonts[i].font);
++		XftUnlockFace(hbfontcache.fonts[i].match);
++	}
++
++	if (hbfontcache.fonts != NULL) {
++		free(hbfontcache.fonts);
++		hbfontcache.fonts = NULL;
++	}
++	hbfontcache.capacity = 0;
++}
++
++hb_font_t *
++hbfindfont(XftFont *match)
++{
++	for (int i = 0; i < hbfontcache.capacity; i++) {
++		if (hbfontcache.fonts[i].match == match)
++			return hbfontcache.fonts[i].font;
++	}
++
++	/* Font not found in cache, caching it now. */
++	hbfontcache.fonts = realloc(hbfontcache.fonts, sizeof(HbFontMatch) * (hbfontcache.capacity + 1));
++	FT_Face face = XftLockFace(match);
++	hb_font_t *font = hb_ft_font_create(face, NULL);
++	if (font == NULL)
++		die("Failed to load Harfbuzz font.");
++
++	hbfontcache.fonts[hbfontcache.capacity].match = match;
++	hbfontcache.fonts[hbfontcache.capacity].font = font;
++	hbfontcache.capacity += 1;
++
++	return font;
++}
++
++void hbtransform(HbTransformData *data, XftFont *xfont, const Glyph *glyphs, int start, int length) {
++	ushort mode = USHRT_MAX;
++	unsigned int glyph_count;
++	int rune_idx, glyph_idx, end = start + length;
++
++	hb_font_t *font = hbfindfont(xfont);
++	if (font == NULL)
++		return;
++
++	hb_buffer_t *buffer = hb_buffer_create();
++	hb_buffer_set_direction(buffer, HB_DIRECTION_LTR);
++
++	/* Resize the buffer if required length is larger. */
++	if (hbrunebuffer.capacity < length) {
++		hbrunebuffer.capacity = (length / BUFFER_STEP + 1) * BUFFER_STEP;
++		hbrunebuffer.runes = realloc(hbrunebuffer.runes, hbrunebuffer.capacity * sizeof(Rune));
++	}
++
++	/* Fill buffer with codepoints. */
++	for (rune_idx = 0, glyph_idx = start; glyph_idx < end; glyph_idx++, rune_idx++) {
++		hbrunebuffer.runes[rune_idx] = glyphs[glyph_idx].u;
++		mode = glyphs[glyph_idx].mode;
++		if (mode & ATTR_WDUMMY)
++			hbrunebuffer.runes[rune_idx] = 0x0020;
++	}
++	hb_buffer_add_codepoints(buffer, hbrunebuffer.runes, length, 0, length);
++
++	/* Shape the segment. */
++	hb_shape(font, buffer, features, sizeof(features)/sizeof(hb_feature_t));
++
++	/* Get new glyph info. */
++	hb_glyph_info_t *info = hb_buffer_get_glyph_infos(buffer, &glyph_count);
++	hb_glyph_position_t *pos = hb_buffer_get_glyph_positions(buffer, &glyph_count);
++
++	/* Fill the output. */
++	data->buffer = buffer;
++	data->glyphs = info;
++	data->positions = pos;
++	data->count = glyph_count;
++}
++
++void hbcleanup(HbTransformData *data) {
++	hb_buffer_destroy(data->buffer);
++	memset(data, 0, sizeof(HbTransformData));
++}
+diff --git a/hb.h b/hb.h
+new file mode 100644
+index 0000000..88de9bd
+--- /dev/null
++++ b/hb.h
+@@ -0,0 +1,14 @@
++#include <X11/Xft/Xft.h>
++#include <hb.h>
++#include <hb-ft.h>
++
++typedef struct {
++  hb_buffer_t *buffer;
++  hb_glyph_info_t *glyphs;
++  hb_glyph_position_t *positions;
++  unsigned int count;
++} HbTransformData;
++
++void hbunloadfonts();
++void hbtransform(HbTransformData *, XftFont *, const Glyph *, int, int);
++void hbcleanup(HbTransformData *);
+diff --git a/st.c b/st.c
+index 41d5ace..1c2edd6 100644
+--- a/st.c
++++ b/st.c
+@@ -2643,7 +2643,8 @@ draw(void)
+ 
+ 	drawregion(0, 0, term.col, term.row);
+ 	xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
+-			term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
++			term.ocx, term.ocy, term.line[term.ocy][term.ocx],
++			term.line[term.ocy], term.col);
+ 	term.ocx = cx;
+ 	term.ocy = term.c.y;
+ 	xfinishdraw();
+diff --git a/st.h b/st.h
+index 808f5f7..ae41368 100644
+--- a/st.h
++++ b/st.h
+@@ -11,7 +11,8 @@
+ #define DIVCEIL(n, d)		(((n) + ((d) - 1)) / (d))
+ #define DEFAULT(a, b)		(a) = (a) ? (a) : (b)
+ #define LIMIT(x, a, b)		(x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
+-#define ATTRCMP(a, b)		((a).mode != (b).mode || (a).fg != (b).fg || \
++#define ATTRCMP(a, b)		(((a).mode & (~ATTR_WRAP)) != ((b).mode & (~ATTR_WRAP)) || \
++				(a).fg != (b).fg || \
+ 				(a).bg != (b).bg)
+ #define TIMEDIFF(t1, t2)	((t1.tv_sec-t2.tv_sec)*1000 + \
+ 				(t1.tv_nsec-t2.tv_nsec)/1E6)
+diff --git a/win.h b/win.h
+index 6de960d..94679e4 100644
+--- a/win.h
++++ b/win.h
+@@ -25,7 +25,7 @@ enum win_mode {
+ 
+ void xbell(void);
+ void xclipcopy(void);
+-void xdrawcursor(int, int, Glyph, int, int, Glyph);
++void xdrawcursor(int, int, Glyph, int, int, Glyph, Line, int);
+ void xdrawline(Line, int, int, int);
+ void xfinishdraw(void);
+ void xloadcols(void);
+diff --git a/x.c b/x.c
+index bf6bbf9..929a59a 100644
+--- a/x.c
++++ b/x.c
+@@ -19,6 +19,7 @@ char *argv0;
+ #include "arg.h"
+ #include "st.h"
+ #include "win.h"
++#include "hb.h"
+ 
+ /* types used in config.h */
+ typedef struct {
+@@ -141,6 +142,7 @@ typedef struct {
+ } DC;
+ 
+ static inline ushort sixd_to_16bit(int);
++static void xresetfontsettings(ushort mode, Font **font, int *frcflags);
+ static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
+ static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
+ static void xdrawglyph(Glyph, int, int);
+@@ -757,7 +759,7 @@ xresize(int col, int row)
+ 	xclear(0, 0, win.w, win.h);
+ 
+ 	/* resize to new width */
+-	xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
++	xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec) * 4);
+ }
+ 
+ ushort
+@@ -1062,6 +1064,9 @@ xunloadfont(Font *f)
+ void
+ xunloadfonts(void)
+ {
++	/* Clear Harfbuzz font cache. */
++	hbunloadfonts();
++
+ 	/* Free the loaded fonts in the font cache.  */
+ 	while (frclen > 0)
+ 		XftFontClose(xw.dpy, frc[--frclen].font);
+@@ -1185,7 +1190,7 @@ xinit(int cols, int rows)
+ 	XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
+ 
+ 	/* font spec buffer */
+-	xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec));
++	xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec) * 4);
+ 
+ 	/* Xft rendering context */
+ 	xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
+@@ -1241,6 +1246,22 @@ xinit(int cols, int rows)
+ 	boxdraw_xinit(xw.dpy, xw.cmap, xw.draw, xw.vis);
+ }
+ 
++void
++xresetfontsettings(ushort mode, Font **font, int *frcflags)
++{
++	*font = &dc.font;
++	if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
++		*font = &dc.ibfont;
++		*frcflags = FRC_ITALICBOLD;
++	} else if (mode & ATTR_ITALIC) {
++		*font = &dc.ifont;
++		*frcflags = FRC_ITALIC;
++	} else if (mode & ATTR_BOLD) {
++		*font = &dc.bfont;
++		*frcflags = FRC_BOLD;
++	}
++}
++
+ int
+ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
+ {
+@@ -1255,126 +1276,158 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x
+ 	FcPattern *fcpattern, *fontpattern;
+ 	FcFontSet *fcsets[] = { NULL };
+ 	FcCharSet *fccharset;
+-	int i, f, numspecs = 0;
++	int i, f, length = 0, start = 0, numspecs = 0;
++	float cluster_xp = xp, cluster_yp = yp;
++	HbTransformData shaped = { 0 };
++
++	/* Initial values. */
++	mode = prevmode = glyphs[0].mode;
++	xresetfontsettings(mode, &font, &frcflags);
+ 
+ 	for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
+-		/* Fetch rune and mode for current glyph. */
+-		rune = glyphs[i].u;
+ 		mode = glyphs[i].mode;
+ 
+ 		/* Skip dummy wide-character spacing. */
+-		if (mode == ATTR_WDUMMY)
++		if (mode & ATTR_WDUMMY && i < (len - 1))
+ 			continue;
+ 
+-		/* Determine font for glyph if different from previous glyph. */
+-		if (prevmode != mode) {
+-			prevmode = mode;
+-			font = &dc.font;
+-			frcflags = FRC_NORMAL;
+-			runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
+-			if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
+-				font = &dc.ibfont;
+-				frcflags = FRC_ITALICBOLD;
+-			} else if (mode & ATTR_ITALIC) {
+-				font = &dc.ifont;
+-				frcflags = FRC_ITALIC;
+-			} else if (mode & ATTR_BOLD) {
+-				font = &dc.bfont;
+-				frcflags = FRC_BOLD;
++		if (
++			prevmode != mode
++			|| ATTRCMP(glyphs[start], glyphs[i])
++			|| selected(x + i, y) != selected(x + start, y)
++			|| i == (len - 1)
++		) {
++			/* Handle 1-character wide segments and end of line */
++			length = i - start;
++			if (i == start) {
++				length = 1;
++			} else if (i == (len - 1)) {
++				length = (i - start + 1);
+ 			}
+-			yp = winy + font->ascent;
+-		}
+ 
+-		if (mode & ATTR_BOXDRAW) {
+-			/* minor shoehorning: boxdraw uses only this ushort */
+-			glyphidx = boxdrawindex(&glyphs[i]);
+-		} else {
+-			/* Lookup character index with default font. */
+-			glyphidx = XftCharIndex(xw.dpy, font->match, rune);
+-		}
+-		if (glyphidx) {
+-			specs[numspecs].font = font->match;
+-			specs[numspecs].glyph = glyphidx;
+-			specs[numspecs].x = (short)xp;
+-			specs[numspecs].y = (short)yp;
+-			xp += runewidth;
+-			numspecs++;
+-			continue;
+-		}
+-
+-		/* Fallback on font cache, search the font cache for match. */
+-		for (f = 0; f < frclen; f++) {
+-			glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
+-			/* Everything correct. */
+-			if (glyphidx && frc[f].flags == frcflags)
+-				break;
+-			/* We got a default font for a not found glyph. */
+-			if (!glyphidx && frc[f].flags == frcflags
+-					&& frc[f].unicodep == rune) {
+-				break;
++			/* Shape the segment. */
++			hbtransform(&shaped, font->match, glyphs, start, length);
++			runewidth = win.cw * ((glyphs[start].mode & ATTR_WIDE) ? 2.0f : 1.0f);
++			cluster_xp = xp; cluster_yp = yp;
++			for (int code_idx = 0; code_idx < shaped.count; code_idx++) {
++				int idx = shaped.glyphs[code_idx].cluster;
++
++				if (glyphs[start + idx].mode & ATTR_WDUMMY)
++					continue;
++
++				/* Advance the drawing cursor if we've moved to a new cluster */
++				if (code_idx > 0 && idx != shaped.glyphs[code_idx - 1].cluster) {
++					xp += runewidth;
++					cluster_xp = xp;
++					cluster_yp = yp;
++					runewidth = win.cw * ((glyphs[start + idx].mode & ATTR_WIDE) ? 2.0f : 1.0f);
++				}
++
++				if (glyphs[start + code_idx].mode & ATTR_BOXDRAW) {
++					/* minor shoehorning: boxdraw uses only this ushort */
++					specs[numspecs].font = font->match;
++					specs[numspecs].glyph = boxdrawindex(&glyphs[start + code_idx]);
++					specs[numspecs].x = xp;
++					specs[numspecs].y = yp;
++					numspecs++;
++				} else if (shaped.glyphs[code_idx].codepoint != 0) {
++					/* If symbol is found, put it into the specs. */
++					specs[numspecs].font = font->match;
++					specs[numspecs].glyph = shaped.glyphs[code_idx].codepoint;
++					specs[numspecs].x = cluster_xp + (short)(shaped.positions[code_idx].x_offset / 64.);
++					specs[numspecs].y = cluster_yp - (short)(shaped.positions[code_idx].y_offset / 64.);
++					cluster_xp += shaped.positions[code_idx].x_advance / 64.;
++					cluster_yp += shaped.positions[code_idx].y_advance / 64.;
++					numspecs++;
++				} else {
++					/* If it's not found, try to fetch it through the font cache. */
++					rune = glyphs[start + idx].u;
++					for (f = 0; f < frclen; f++) {
++						glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
++						/* Everything correct. */
++						if (glyphidx && frc[f].flags == frcflags)
++							break;
++						/* We got a default font for a not found glyph. */
++						if (!glyphidx && frc[f].flags == frcflags
++								&& frc[f].unicodep == rune) {
++							break;
++						}
++					}
++
++					/* Nothing was found. Use fontconfig to find matching font. */
++					if (f >= frclen) {
++						if (!font->set)
++							font->set = FcFontSort(0, font->pattern,
++																		 1, 0, &fcres);
++						fcsets[0] = font->set;
++
++						/*
++						 * Nothing was found in the cache. Now use
++						 * some dozen of Fontconfig calls to get the
++						 * font for one single character.
++						 *
++						 * Xft and fontconfig are design failures.
++						 */
++						fcpattern = FcPatternDuplicate(font->pattern);
++						fccharset = FcCharSetCreate();
++
++						FcCharSetAddChar(fccharset, rune);
++						FcPatternAddCharSet(fcpattern, FC_CHARSET,
++								fccharset);
++						FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
++
++						FcConfigSubstitute(0, fcpattern,
++								FcMatchPattern);
++						FcDefaultSubstitute(fcpattern);
++
++						fontpattern = FcFontSetMatch(0, fcsets, 1,
++								fcpattern, &fcres);
++
++						/* Allocate memory for the new cache entry. */
++						if (frclen >= frccap) {
++							frccap += 16;
++							frc = xrealloc(frc, frccap * sizeof(Fontcache));
++						}
++
++						frc[frclen].font = XftFontOpenPattern(xw.dpy,
++								fontpattern);
++						if (!frc[frclen].font)
++							die("XftFontOpenPattern failed seeking fallback font: %s\n",
++								strerror(errno));
++						frc[frclen].flags = frcflags;
++						frc[frclen].unicodep = rune;
++
++						glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
++
++						f = frclen;
++						frclen++;
++
++						FcPatternDestroy(fcpattern);
++						FcCharSetDestroy(fccharset);
++					}
++
++					specs[numspecs].font = frc[f].font;
++					specs[numspecs].glyph = glyphidx;
++					specs[numspecs].x = (short)xp;
++					specs[numspecs].y = (short)yp;
++					numspecs++;
++				}
+ 			}
+-		}
+ 
+-		/* Nothing was found. Use fontconfig to find matching font. */
+-		if (f >= frclen) {
+-			if (!font->set)
+-				font->set = FcFontSort(0, font->pattern,
+-				                       1, 0, &fcres);
+-			fcsets[0] = font->set;
++			/* Cleanup and get ready for next segment. */
++			hbcleanup(&shaped);
++			start = i;
+ 
+-			/*
+-			 * Nothing was found in the cache. Now use
+-			 * some dozen of Fontconfig calls to get the
+-			 * font for one single character.
+-			 *
+-			 * Xft and fontconfig are design failures.
+-			 */
+-			fcpattern = FcPatternDuplicate(font->pattern);
+-			fccharset = FcCharSetCreate();
+-
+-			FcCharSetAddChar(fccharset, rune);
+-			FcPatternAddCharSet(fcpattern, FC_CHARSET,
+-					fccharset);
+-			FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
+-
+-			FcConfigSubstitute(0, fcpattern,
+-					FcMatchPattern);
+-			FcDefaultSubstitute(fcpattern);
+-
+-			fontpattern = FcFontSetMatch(0, fcsets, 1,
+-					fcpattern, &fcres);
+-
+-			/* Allocate memory for the new cache entry. */
+-			if (frclen >= frccap) {
+-				frccap += 16;
+-				frc = xrealloc(frc, frccap * sizeof(Fontcache));
++			/* Determine font for glyph if different from previous glyph. */
++			if (prevmode != mode) {
++				prevmode = mode;
++				xresetfontsettings(mode, &font, &frcflags);
++				yp = winy + font->ascent;
+ 			}
+-
+-			frc[frclen].font = XftFontOpenPattern(xw.dpy,
+-					fontpattern);
+-			if (!frc[frclen].font)
+-				die("XftFontOpenPattern failed seeking fallback font: %s\n",
+-					strerror(errno));
+-			frc[frclen].flags = frcflags;
+-			frc[frclen].unicodep = rune;
+-
+-			glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
+-
+-			f = frclen;
+-			frclen++;
+-
+-			FcPatternDestroy(fcpattern);
+-			FcCharSetDestroy(fccharset);
+ 		}
+-
+-		specs[numspecs].font = frc[f].font;
+-		specs[numspecs].glyph = glyphidx;
+-		specs[numspecs].x = (short)xp;
+-		specs[numspecs].y = (short)yp;
+-		xp += runewidth;
+-		numspecs++;
+ 	}
+ 
++	hbcleanup(&shaped);
+ 	return numspecs;
+ }
+ 
+@@ -1528,14 +1581,17 @@ xdrawglyph(Glyph g, int x, int y)
+ }
+ 
+ void
+-xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
++xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og, Line line, int len)
+ {
+ 	Color drawcol;
+ 
+ 	/* remove the old cursor */
+ 	if (selected(ox, oy))
+ 		og.mode ^= ATTR_REVERSE;
+-	xdrawglyph(og, ox, oy);
++
++	/* Redraw the line where cursor was previously.
++	 * It will restore the ligatures broken by the cursor. */
++	xdrawline(line, 0, oy, len);
+ 
+ 	if (IS_SET(MODE_HIDE))
+ 		return;
+@@ -1663,18 +1719,16 @@ xdrawline(Line line, int x1, int y1, int x2)
+ 	Glyph base, new;
+ 	XftGlyphFontSpec *specs = xw.specbuf;
+ 
+-	numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y1);
+ 	i = ox = 0;
+-	for (x = x1; x < x2 && i < numspecs; x++) {
++	for (x = x1; x < x2; x++) {
+ 		new = line[x];
+ 		if (new.mode == ATTR_WDUMMY)
+ 			continue;
+ 		if (selected(x, y1))
+ 			new.mode ^= ATTR_REVERSE;
+-		if (i > 0 && ATTRCMP(base, new)) {
+-			xdrawglyphfontspecs(specs, base, i, ox, y1);
+-			specs += i;
+-			numspecs -= i;
++		if ((i > 0) && ATTRCMP(base, new)) {
++			numspecs = xmakeglyphfontspecs(specs, &line[ox], x - ox, ox, y1);
++			xdrawglyphfontspecs(specs, base, numspecs, ox, y1);
+ 			i = 0;
+ 		}
+ 		if (i == 0) {
+@@ -1683,8 +1737,10 @@ xdrawline(Line line, int x1, int y1, int x2)
+ 		}
+ 		i++;
+ 	}
+-	if (i > 0)
+-		xdrawglyphfontspecs(specs, base, i, ox, y1);
++	if (i > 0) {
++		numspecs = xmakeglyphfontspecs(specs, &line[ox], x2 - ox, ox, y1);
++		xdrawglyphfontspecs(specs, base, numspecs, ox, y1);
++	}
+ }
+ 
+ void

patches/st-selectioncolors-0.8.4.diff

@@ -0,0 +1,130 @@
+From 0750c0b8c91579ec871c70c8990527bebc86a56e Mon Sep 17 00:00:00 2001
+From: Ashish Kumar Yadav <ashishkumar.yadav@students.iiserpune.ac.in>
+Date: Sat, 31 Jul 2021 22:21:11 +0530
+Subject: [PATCH] Add settings for selection-colors
+
+This patch adds the two color-settings *selectionfg* and *selectionbg* to
+config.def.h. Those define the fore- and background colors which are used when
+text on the screen is selected with the mouse. This removes the default
+behaviour which would simply reverse the colors.
+
+Additionally, a third setting *ingnoreselfg* exists. If true then the setting
+*selectionfg* is ignored and the original foreground-colors of each cell are
+not changed during selection. Basically only the background-color would change.
+This might be more visually appealing to some folks.
+---
+ config.def.h | 11 ++++++++---
+ st.h         |  1 +
+ x.c          | 30 +++++++++++++-----------------
+ 3 files changed, 22 insertions(+), 20 deletions(-)
+
+diff --git a/config.def.h b/config.def.h
+index 6f05dce..3679af8 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -119,18 +119,23 @@ static const char *colorname[] = {
+ 
+ 	/* more colors can be added after 255 to use with DefaultXX */
+ 	"#cccccc",
+-	"#555555",
++	"#2e3440",
+ };
+ 
+ 
+ /*
+  * Default colors (colorname index)
+- * foreground, background, cursor, reverse cursor
++ * foreground, background, cursor, reverse cursor, selection
+  */
+ unsigned int defaultfg = 7;
+ unsigned int defaultbg = 0;
+ static unsigned int defaultcs = 256;
+-static unsigned int defaultrcs = 257;
++static unsigned int defaultrcs = 256;
++unsigned int selectionbg = 257;
++unsigned int selectionfg = 7;
++/* If 0 use selectionfg as foreground in order to have a uniform foreground-color */
++/* Else if 1 keep original foreground-color of each cell => more colors :) */
++static int ignoreselfg = 1;
+ 
+ /*
+  * Default shape of cursor
+diff --git a/st.h b/st.h
+index 3d351b6..e1a28c3 100644
+--- a/st.h
++++ b/st.h
+@@ -33,6 +33,7 @@ enum glyph_attribute {
+ 	ATTR_WRAP       = 1 << 8,
+ 	ATTR_WIDE       = 1 << 9,
+ 	ATTR_WDUMMY     = 1 << 10,
++	ATTR_SELECTED   = 1 << 11,
+ 	ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
+ };
+ 
+diff --git a/x.c b/x.c
+index 210f184..7a6c70e 100644
+--- a/x.c
++++ b/x.c
+@@ -1425,6 +1425,12 @@ xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, i
+ 		bg = temp;
+ 	}
+ 
++	if (base.mode & ATTR_SELECTED) {
++		bg = &dc.col[selectionbg];
++		if (!ignoreselfg)
++			fg = &dc.col[selectionfg];
++	}
++
+ 	if (base.mode & ATTR_BLINK && win.mode & MODE_BLINK)
+ 		fg = bg;
+ 
+@@ -1491,7 +1497,7 @@ xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
+ 
+ 	/* remove the old cursor */
+ 	if (selected(ox, oy))
+-		og.mode ^= ATTR_REVERSE;
++		og.mode |= ATTR_SELECTED;
+ 	xdrawglyph(og, ox, oy);
+ 
+ 	if (IS_SET(MODE_HIDE))
+@@ -1504,23 +1510,13 @@ xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
+ 
+ 	if (IS_SET(MODE_REVERSE)) {
+ 		g.mode |= ATTR_REVERSE;
++		g.fg = defaultcs;
+ 		g.bg = defaultfg;
+-		if (selected(cx, cy)) {
+-			drawcol = dc.col[defaultcs];
+-			g.fg = defaultrcs;
+-		} else {
+-			drawcol = dc.col[defaultrcs];
+-			g.fg = defaultcs;
+-		}
++		drawcol = dc.col[defaultrcs];
+ 	} else {
+-		if (selected(cx, cy)) {
+-			g.fg = defaultfg;
+-			g.bg = defaultrcs;
+-		} else {
+-			g.fg = defaultbg;
+-			g.bg = defaultcs;
+-		}
+-		drawcol = dc.col[g.bg];
++		g.fg = defaultbg;
++		g.bg = defaultcs;
++		drawcol = dc.col[defaultcs];
+ 	}
+ 
+ 	/* draw the new one */
+@@ -1612,7 +1608,7 @@ xdrawline(Line line, int x1, int y1, int x2)
+ 		if (new.mode == ATTR_WDUMMY)
+ 			continue;
+ 		if (selected(x, y1))
+-			new.mode ^= ATTR_REVERSE;
++			new.mode |= ATTR_SELECTED;
+ 		if (i > 0 && ATTRCMP(base, new)) {
+ 			xdrawglyphfontspecs(specs, base, i, ox, y1);
+ 			specs += i;
+-- 
+2.32.0
+

patches/st-undercurl-0.8.4-20210822.diff

@@ -0,0 +1,605 @@
+diff --git a/config.def.h b/config.def.h
+index 6f05dce..7ae1b92 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -470,3 +470,27 @@ static char ascii_printable[] =
+ 	" !\"#$%&'()*+,-./0123456789:;<=>?"
+ 	"@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_"
+ 	"`abcdefghijklmnopqrstuvwxyz{|}~";
++
++/**
++ * Undercurl style. Set UNDERCURL_STYLE to one of the available styles.
++ *
++ * Curly: Dunno how to draw it *shrug*
++ *  _   _   _   _
++ * ( ) ( ) ( ) ( )
++ *	 (_) (_) (_) (_)
++ *
++ * Spiky:
++ * /\  /\   /\	/\
++ *   \/  \/	  \/
++ *
++ * Capped:
++ *	_     _     _
++ * / \   / \   / \
++ *    \_/   \_/
++ */
++// Available styles
++#define UNDERCURL_CURLY 0
++#define UNDERCURL_SPIKY 1
++#define UNDERCURL_CAPPED 2
++// Active style
++#define UNDERCURL_STYLE UNDERCURL_SPIKY
+diff --git a/st.c b/st.c
+index 76b7e0d..542ab3a 100644
+--- a/st.c
++++ b/st.c
+@@ -33,6 +33,7 @@
+ #define UTF_SIZ       4
+ #define ESC_BUF_SIZ   (128*UTF_SIZ)
+ #define ESC_ARG_SIZ   16
++#define CAR_PER_ARG   4
+ #define STR_BUF_SIZ   ESC_BUF_SIZ
+ #define STR_ARG_SIZ   ESC_ARG_SIZ
+ 
+@@ -139,6 +140,7 @@ typedef struct {
+ 	int arg[ESC_ARG_SIZ];
+ 	int narg;              /* nb of args */
+ 	char mode[2];
++	int carg[ESC_ARG_SIZ][CAR_PER_ARG]; /* colon args */
+ } CSIEscape;
+ 
+ /* STR Escape sequence structs */
+@@ -159,6 +161,7 @@ static void ttywriteraw(const char *, size_t);
+ 
+ static void csidump(void);
+ static void csihandle(void);
++static void readcolonargs(char **, int, int[][CAR_PER_ARG]);
+ static void csiparse(void);
+ static void csireset(void);
+ static int eschandle(uchar);
+@@ -1131,6 +1134,28 @@ tnewline(int first_col)
+ 	tmoveto(first_col ? 0 : term.c.x, y);
+ }
+ 
++void
++readcolonargs(char **p, int cursor, int params[][CAR_PER_ARG])
++{
++	int i = 0;
++	for (; i < CAR_PER_ARG; i++)
++		params[cursor][i] = -1;
++
++	if (**p != ':')
++		return;
++
++	char *np = NULL;
++	i = 0;
++
++	while (**p == ':' && i < CAR_PER_ARG) {
++		while (**p == ':')
++			(*p)++;
++		params[cursor][i] = strtol(*p, &np, 10);
++		*p = np;
++		i++;
++	}
++}
++
+ void
+ csiparse(void)
+ {
+@@ -1153,6 +1178,7 @@ csiparse(void)
+ 			v = -1;
+ 		csiescseq.arg[csiescseq.narg++] = v;
+ 		p = np;
++		readcolonargs(&p, csiescseq.narg-1, csiescseq.carg);
+ 		if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
+ 			break;
+ 		p++;
+@@ -1369,6 +1395,10 @@ tsetattr(int *attr, int l)
+ 				ATTR_STRUCK     );
+ 			term.c.attr.fg = defaultfg;
+ 			term.c.attr.bg = defaultbg;
++			term.c.attr.ustyle = -1;
++			term.c.attr.ucolor[0] = -1;
++			term.c.attr.ucolor[1] = -1;
++			term.c.attr.ucolor[2] = -1;
+ 			break;
+ 		case 1:
+ 			term.c.attr.mode |= ATTR_BOLD;
+@@ -1380,7 +1410,14 @@ tsetattr(int *attr, int l)
+ 			term.c.attr.mode |= ATTR_ITALIC;
+ 			break;
+ 		case 4:
+-			term.c.attr.mode |= ATTR_UNDERLINE;
++			term.c.attr.ustyle = csiescseq.carg[i][0];
++
++			if (term.c.attr.ustyle != 0)
++				term.c.attr.mode |= ATTR_UNDERLINE;
++			else
++				term.c.attr.mode &= ~ATTR_UNDERLINE;
++
++			term.c.attr.mode ^= ATTR_DIRTYUNDERLINE;
+ 			break;
+ 		case 5: /* slow blink */
+ 			/* FALLTHROUGH */
+@@ -1431,6 +1468,18 @@ tsetattr(int *attr, int l)
+ 		case 49:
+ 			term.c.attr.bg = defaultbg;
+ 			break;
++		case 58:
++			term.c.attr.ucolor[0] = csiescseq.carg[i][1];
++			term.c.attr.ucolor[1] = csiescseq.carg[i][2];
++			term.c.attr.ucolor[2] = csiescseq.carg[i][3];
++			term.c.attr.mode ^= ATTR_DIRTYUNDERLINE;
++			break;
++		case 59:
++			term.c.attr.ucolor[0] = -1;
++			term.c.attr.ucolor[1] = -1;
++			term.c.attr.ucolor[2] = -1;
++			term.c.attr.mode ^= ATTR_DIRTYUNDERLINE;
++			break;
+ 		default:
+ 			if (BETWEEN(attr[i], 30, 37)) {
+ 				term.c.attr.fg = attr[i] - 30;
+diff --git a/st.h b/st.h
+index 3d351b6..95bdcbd 100644
+--- a/st.h
++++ b/st.h
+@@ -34,6 +34,7 @@ enum glyph_attribute {
+ 	ATTR_WIDE       = 1 << 9,
+ 	ATTR_WDUMMY     = 1 << 10,
+ 	ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
++	ATTR_DIRTYUNDERLINE = 1 << 15,
+ };
+ 
+ enum selection_mode {
+@@ -65,6 +66,8 @@ typedef struct {
+ 	ushort mode;      /* attribute flags */
+ 	uint32_t fg;      /* foreground  */
+ 	uint32_t bg;      /* background  */
++	int ustyle;	  /* underline style */
++	int ucolor[3];    /* underline color */
+ } Glyph;
+ 
+ typedef Glyph *Line;
+diff --git a/st.info b/st.info
+index 8201ad6..659878c 100644
+--- a/st.info
++++ b/st.info
+@@ -1,4 +1,5 @@
+ st-mono| simpleterm monocolor,
++	Su,
+ 	acsc=+C\,D-A.B0E``aaffgghFiGjjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~,
+ 	am,
+ 	bce,
+diff --git a/x.c b/x.c
+index 210f184..3a0e79e 100644
+--- a/x.c
++++ b/x.c
+@@ -45,6 +45,14 @@ typedef struct {
+ 	signed char appcursor; /* application cursor */
+ } Key;
+ 
++/* Undercurl slope types */
++enum undercurl_slope_type {
++	UNDERCURL_SLOPE_ASCENDING = 0,
++	UNDERCURL_SLOPE_TOP_CAP = 1,
++	UNDERCURL_SLOPE_DESCENDING = 2,
++	UNDERCURL_SLOPE_BOTTOM_CAP = 3
++};
++
+ /* X modifiers */
+ #define XK_ANY_MOD    UINT_MAX
+ #define XK_NO_MOD     0
+@@ -1339,6 +1347,51 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x
+ 	return numspecs;
+ }
+ 
++static int isSlopeRising (int x, int iPoint, int waveWidth)
++{
++	//    .     .     .     .
++	//   / \   / \   / \   / \
++	//  /   \ /   \ /   \ /   \
++	// .     .     .     .     .
++
++	// Find absolute `x` of point
++	x += iPoint * (waveWidth/2);
++
++	// Find index of absolute wave
++	int absSlope = x / ((float)waveWidth/2);
++
++	return (absSlope % 2);
++}
++
++static int getSlope (int x, int iPoint, int waveWidth)
++{
++	// Sizes: Caps are half width of slopes
++	//    1_2       1_2       1_2      1_2
++	//   /   \     /   \     /   \    /   \
++	//  /     \   /     \   /     \  /     \
++	// 0       3_0       3_0      3_0       3_
++	// <2->    <1>         <---6---->
++
++	// Find type of first point
++	int firstType;
++	x -= (x / waveWidth) * waveWidth;
++	if (x < (waveWidth * (2.f/6.f)))
++		firstType = UNDERCURL_SLOPE_ASCENDING;
++	else if (x < (waveWidth * (3.f/6.f)))
++		firstType = UNDERCURL_SLOPE_TOP_CAP;
++	else if (x < (waveWidth * (5.f/6.f)))
++		firstType = UNDERCURL_SLOPE_DESCENDING;
++	else
++		firstType = UNDERCURL_SLOPE_BOTTOM_CAP;
++
++	// Find type of given point
++	int pointType = (iPoint % 4);
++	pointType += firstType;
++	pointType %= 4;
++
++	return pointType;
++}
++
+ void
+ xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
+ {
+@@ -1461,8 +1514,357 @@ xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, i
+ 
+ 	/* Render underline and strikethrough. */
+ 	if (base.mode & ATTR_UNDERLINE) {
+-		XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
+-				width, 1);
++		// Underline Color
++		const int widthThreshold  = 28; // +1 width every widthThreshold px of font
++		int wlw = (win.ch / widthThreshold) + 1; // Wave Line Width
++		int linecolor;
++		if ((base.ucolor[0] >= 0) &&
++			!(base.mode & ATTR_BLINK && win.mode & MODE_BLINK) &&
++			!(base.mode & ATTR_INVISIBLE)
++		) {
++			// Special color for underline
++			// Index
++			if (base.ucolor[1] < 0) {
++				linecolor = dc.col[base.ucolor[0]].pixel;
++			}
++			// RGB
++			else {
++				XColor lcolor;
++				lcolor.red = base.ucolor[0] * 257;
++				lcolor.green = base.ucolor[1] * 257;
++				lcolor.blue = base.ucolor[2] * 257;
++				lcolor.flags = DoRed | DoGreen | DoBlue;
++				XAllocColor(xw.dpy, xw.cmap, &lcolor);
++				linecolor = lcolor.pixel;
++			}
++		} else {
++			// Foreground color for underline
++			linecolor = fg->pixel;
++		}
++
++		XGCValues ugcv = {
++			.foreground = linecolor,
++			.line_width = wlw,
++			.line_style = LineSolid,
++			.cap_style = CapNotLast
++		};
++
++		GC ugc = XCreateGC(xw.dpy, XftDrawDrawable(xw.draw),
++			GCForeground | GCLineWidth | GCLineStyle | GCCapStyle,
++			&ugcv);
++
++		// Underline Style
++		if (base.ustyle != 3) {
++			//XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1, width, 1);
++			XFillRectangle(xw.dpy, XftDrawDrawable(xw.draw), ugc, winx,
++				winy + dc.font.ascent + 1, width, wlw);
++		} else if (base.ustyle == 3) {
++			int ww = win.cw;//width;
++			int wh = dc.font.descent - wlw/2 - 1;//r.height/7;
++			int wx = winx;
++			int wy = winy + win.ch - dc.font.descent;
++
++#if UNDERCURL_STYLE == UNDERCURL_CURLY
++			// Draw waves
++			int narcs = charlen * 2 + 1;
++			XArc *arcs = xmalloc(sizeof(XArc) * narcs);
++
++			int i = 0;
++			for (i = 0; i < charlen-1; i++) {
++				arcs[i*2] = (XArc) {
++					.x = wx + win.cw * i + ww / 4,
++					.y = wy,
++					.width = win.cw / 2,
++					.height = wh,
++					.angle1 = 0,
++					.angle2 = 180 * 64
++				};
++				arcs[i*2+1] = (XArc) {
++					.x = wx + win.cw * i + ww * 0.75,
++					.y = wy,
++					.width = win.cw/2,
++					.height = wh,
++					.angle1 = 180 * 64,
++					.angle2 = 180 * 64
++				};
++			}
++			// Last wave
++			arcs[i*2] = (XArc) {wx + ww * i + ww / 4, wy, ww / 2, wh,
++			0, 180 * 64 };
++			// Last wave tail
++			arcs[i*2+1] = (XArc) {wx + ww * i + ww * 0.75, wy, ceil(ww / 2.),
++			wh, 180 * 64, 90 * 64};
++			// First wave tail
++			i++;
++			arcs[i*2] = (XArc) {wx - ww/4 - 1, wy, ceil(ww / 2.), wh, 270 * 64,
++			90 * 64 };
++
++			XDrawArcs(xw.dpy, XftDrawDrawable(xw.draw), ugc, arcs, narcs);
++
++			free(arcs);
++#elif UNDERCURL_STYLE == UNDERCURL_SPIKY
++			// Make the underline corridor larger
++			/*
++			wy -= wh;
++			*/
++			wh *= 2;
++
++			// Set the angle of the slope to 45°
++			ww = wh;
++
++			// Position of wave is independent of word, it's absolute
++			wx = (wx / (ww/2)) * (ww/2);
++
++			int marginStart = winx - wx;
++
++			// Calculate number of points with floating precision
++			float n = width;					// Width of word in pixels
++			n = (n / ww) * 2;					// Number of slopes (/ or \)
++			n += 2;								// Add two last points
++			int npoints = n;					// Convert to int
++
++			// Total length of underline
++			float waveLength = 0;
++
++			if (npoints >= 3) {
++				// We add an aditional slot in case we use a bonus point
++				XPoint *points = xmalloc(sizeof(XPoint) * (npoints + 1));
++
++				// First point (Starts with the word bounds)
++				points[0] = (XPoint) {
++					.x = wx + marginStart,
++					.y = (isSlopeRising(wx, 0, ww))
++						? (wy - marginStart + ww/2.f)
++						: (wy + marginStart)
++				};
++
++				// Second point (Goes back to the absolute point coordinates)
++				points[1] = (XPoint) {
++					.x = (ww/2.f) - marginStart,
++					.y = (isSlopeRising(wx, 1, ww))
++						? (ww/2.f - marginStart)
++						: (-ww/2.f + marginStart)
++				};
++				waveLength += (ww/2.f) - marginStart;
++
++				// The rest of the points
++				for (int i = 2; i < npoints-1; i++) {
++					points[i] = (XPoint) {
++						.x = ww/2,
++						.y = (isSlopeRising(wx, i, ww))
++							? wh/2
++							: -wh/2
++					};
++					waveLength += ww/2;
++				}
++
++				// Last point
++				points[npoints-1] = (XPoint) {
++					.x = ww/2,
++					.y = (isSlopeRising(wx, npoints-1, ww))
++						? wh/2
++						: -wh/2
++				};
++				waveLength += ww/2;
++
++				// End
++				if (waveLength < width) { // Add a bonus point?
++					int marginEnd = width - waveLength;
++					points[npoints] = (XPoint) {
++						.x = marginEnd,
++						.y = (isSlopeRising(wx, npoints, ww))
++							? (marginEnd)
++							: (-marginEnd)
++					};
++
++					npoints++;
++				} else if (waveLength > width) { // Is last point too far?
++					int marginEnd = waveLength - width;
++					points[npoints-1].x -= marginEnd;
++					if (isSlopeRising(wx, npoints-1, ww))
++						points[npoints-1].y -= (marginEnd);
++					else
++						points[npoints-1].y += (marginEnd);
++				}
++
++				// Draw the lines
++				XDrawLines(xw.dpy, XftDrawDrawable(xw.draw), ugc, points, npoints,
++						CoordModePrevious);
++
++				// Draw a second underline with an offset of 1 pixel
++				if ( ((win.ch / (widthThreshold/2)) % 2)) {
++					points[0].x++;
++
++					XDrawLines(xw.dpy, XftDrawDrawable(xw.draw), ugc, points,
++							npoints, CoordModePrevious);
++				}
++
++				// Free resources
++				free(points);
++			}
++#else // UNDERCURL_CAPPED
++			// Cap is half of wave width
++			float capRatio = 0.5f;
++
++			// Make the underline corridor larger
++			wh *= 2;
++
++			// Set the angle of the slope to 45°
++			ww = wh;
++			ww *= 1 + capRatio; // Add a bit of width for the cap
++
++			// Position of wave is independent of word, it's absolute
++			wx = (wx / ww) * ww;
++
++			float marginStart;
++			switch(getSlope(winx, 0, ww)) {
++				case UNDERCURL_SLOPE_ASCENDING:
++					marginStart = winx - wx;
++					break;
++				case UNDERCURL_SLOPE_TOP_CAP:
++					marginStart = winx - (wx + (ww * (2.f/6.f)));
++					break;
++				case UNDERCURL_SLOPE_DESCENDING:
++					marginStart = winx - (wx + (ww * (3.f/6.f)));
++					break;
++				case UNDERCURL_SLOPE_BOTTOM_CAP:
++					marginStart = winx - (wx + (ww * (5.f/6.f)));
++					break;
++			}
++
++			// Calculate number of points with floating precision
++			float n = width;					// Width of word in pixels
++												//					   ._.
++			n = (n / ww) * 4;					// Number of points (./   \.)
++			n += 2;								// Add two last points
++			int npoints = n;					// Convert to int
++
++			// Position of the pen to draw the lines
++			float penX = 0;
++			float penY = 0;
++
++			if (npoints >= 3) {
++				XPoint *points = xmalloc(sizeof(XPoint) * (npoints + 1));
++
++				// First point (Starts with the word bounds)
++				penX = winx;
++				switch (getSlope(winx, 0, ww)) {
++					case UNDERCURL_SLOPE_ASCENDING:
++						penY = wy + wh/2.f - marginStart;
++						break;
++					case UNDERCURL_SLOPE_TOP_CAP:
++						penY = wy;
++						break;
++					case UNDERCURL_SLOPE_DESCENDING:
++						penY = wy + marginStart;
++						break;
++					case UNDERCURL_SLOPE_BOTTOM_CAP:
++						penY = wy + wh/2.f;
++						break;
++				}
++				points[0].x = penX;
++				points[0].y = penY;
++
++				// Second point (Goes back to the absolute point coordinates)
++				switch (getSlope(winx, 1, ww)) {
++					case UNDERCURL_SLOPE_ASCENDING:
++						penX += ww * (1.f/6.f) - marginStart;
++						penY += 0;
++						break;
++					case UNDERCURL_SLOPE_TOP_CAP:
++						penX += ww * (2.f/6.f) - marginStart;
++						penY += -wh/2.f + marginStart;
++						break;
++					case UNDERCURL_SLOPE_DESCENDING:
++						penX += ww * (1.f/6.f) - marginStart;
++						penY += 0;
++						break;
++					case UNDERCURL_SLOPE_BOTTOM_CAP:
++						penX += ww * (2.f/6.f) - marginStart;
++						penY += -marginStart + wh/2.f;
++						break;
++				}
++				points[1].x = penX;
++				points[1].y = penY;
++
++				// The rest of the points
++				for (int i = 2; i < npoints; i++) {
++					switch (getSlope(winx, i, ww)) {
++						case UNDERCURL_SLOPE_ASCENDING:
++						case UNDERCURL_SLOPE_DESCENDING:
++							penX += ww * (1.f/6.f);
++							penY += 0;
++							break;
++						case UNDERCURL_SLOPE_TOP_CAP:
++							penX += ww * (2.f/6.f);
++							penY += -wh / 2.f;
++							break;
++						case UNDERCURL_SLOPE_BOTTOM_CAP:
++							penX += ww * (2.f/6.f);
++							penY += wh / 2.f;
++							break;
++					}
++					points[i].x = penX;
++					points[i].y = penY;
++				}
++
++				// End
++				float waveLength = penX - winx;
++				if (waveLength < width) { // Add a bonus point?
++					int marginEnd = width - waveLength;
++					penX += marginEnd;
++					switch(getSlope(winx, npoints, ww)) {
++						case UNDERCURL_SLOPE_ASCENDING:
++						case UNDERCURL_SLOPE_DESCENDING:
++							//penY += 0;
++							break;
++						case UNDERCURL_SLOPE_TOP_CAP:
++							penY += -marginEnd;
++							break;
++						case UNDERCURL_SLOPE_BOTTOM_CAP:
++							penY += marginEnd;
++							break;
++					}
++
++					points[npoints].x = penX;
++					points[npoints].y = penY;
++
++					npoints++;
++				} else if (waveLength > width) { // Is last point too far?
++					int marginEnd = waveLength - width;
++					points[npoints-1].x -= marginEnd;
++					switch(getSlope(winx, npoints-1, ww)) {
++						case UNDERCURL_SLOPE_TOP_CAP:
++							points[npoints-1].y += marginEnd;
++							break;
++						case UNDERCURL_SLOPE_BOTTOM_CAP:
++							points[npoints-1].y -= marginEnd;
++							break;
++						default:
++							break;
++					}
++				}
++
++				// Draw the lines
++				XDrawLines(xw.dpy, XftDrawDrawable(xw.draw), ugc, points, npoints,
++						CoordModeOrigin);
++
++				// Draw a second underline with an offset of 1 pixel
++				if ( ((win.ch / (widthThreshold/2)) % 2)) {
++					for (int i = 0; i < npoints; i++)
++						points[i].x++;
++
++					XDrawLines(xw.dpy, XftDrawDrawable(xw.draw), ugc, points,
++							npoints, CoordModeOrigin);
++				}
++
++				// Free resources
++				free(points);
++			}
++#endif
++		}
++
++		XFreeGC(xw.dpy, ugc);
+ 	}
+ 
+ 	if (base.mode & ATTR_STRUCK) {

patches/st-workingdir-20200317-51e19ea.diff

@@ -0,0 +1,97 @@
+From ae14b869d7bc0e0cd8ed16157837ad09aaacacc0 Mon Sep 17 00:00:00 2001
+From: David Gricar <coppie@protonmail.com>
+Date: Tue, 17 Mar 2020 13:38:05 +0100
+Subject: [PATCH] Add switch to provide initial working directory
+
+This patch adds -p switch which takes one argument 'path' and can be
+used to set the initial working directory of the new st instance.
+It acts the same as running 'cd path' command after starting the st
+instance.
+---
+ st.1 |  8 ++++++++
+ x.c  | 13 +++++++++----
+ 2 files changed, 17 insertions(+), 4 deletions(-)
+
+diff --git a/st.1 b/st.1
+index e8d6059..a901122 100644
+--- a/st.1
++++ b/st.1
+@@ -6,6 +6,8 @@ st \- simple terminal
+ .RB [ \-aiv ]
+ .RB [ \-c
+ .IR class ]
++.RB [ \-d
++.IR path ]
+ .RB [ \-f
+ .IR font ]
+ .RB [ \-g
+@@ -30,6 +32,8 @@ st \- simple terminal
+ .RB [ \-aiv ]
+ .RB [ \-c
+ .IR class ]
++.RB [ \-d
++.IR path ]
+ .RB [ \-f
+ .IR font ]
+ .RB [ \-g
+@@ -58,6 +62,10 @@ disable alternate screens in terminal
+ .BI \-c " class"
+ defines the window class (default $TERM).
+ .TP
++.BI \-d " path"
++changes the working directory to
++.IR path .
++.TP
+ .BI \-f " font"
+ defines the
+ .I font
+diff --git a/x.c b/x.c
+index 48a6676..fab2ddc 100644
+--- a/x.c
++++ b/x.c
+@@ -250,6 +250,7 @@ static char *opt_io    = NULL;
+ static char *opt_line  = NULL;
+ static char *opt_name  = NULL;
+ static char *opt_title = NULL;
++static char *opt_dir   = NULL;
+ 
+ static int oldbutton = 3; /* button event on startup: 3 = release */
+ 
+@@ -1958,12 +1959,12 @@ run(void)
+ void
+ usage(void)
+ {
+-	die("usage: %s [-aiv] [-c class] [-f font] [-g geometry]"
+-	    " [-n name] [-o file]\n"
++	die("usage: %s [-aiv] [-c class] [-d path] [-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]"
+-	    " [-n name] [-o file]\n"
++	    "       %s [-aiv] [-c class] [-d path] [-f font]"
++	    " [-g geometry] [-n name] [-o file]\n"
+ 	    "          [-T title] [-t title] [-w windowid] -l line"
+ 	    " [stty_args ...]\n", argv0, argv0);
+ }
+@@ -2015,6 +2016,9 @@ main(int argc, char *argv[])
+ 	case 'v':
+ 		die("%s " VERSION "\n", argv0);
+ 		break;
++	case 'd':
++		opt_dir = EARGF(usage());
++		break;
+ 	default:
+ 		usage();
+ 	} ARGEND;
+@@ -2034,6 +2038,7 @@ run:
+ 	xinit(cols, rows);
+ 	xsetenv();
+ 	selinit();
++	chdir(opt_dir);
+ 	run();
+ 
+ 	return 0;
+-- 
+2.25.1
+

st.1

@@ -6,6 +6,8 @@ st \- simple terminal
 .RB [ \-aiv ]
 .RB [ \-c
 .IR class ]
+.RB [ \-d
+.IR path ]
 .RB [ \-f
 .IR font ]
 .RB [ \-g
@@ -30,6 +32,8 @@ st \- simple terminal
 .RB [ \-aiv ]
 .RB [ \-c
 .IR class ]
+.RB [ \-d
+.IR path ]
 .RB [ \-f
 .IR font ]
 .RB [ \-g
@@ -58,6 +62,10 @@ disable alternate screens in terminal
 .BI \-c " class"
 defines the window class (default $TERM).
 .TP
+.BI \-d " path"
+changes the working directory to
+.IR path .
+.TP
 .BI \-f " font"
 defines the
 .I font

st.c

@@ -33,6 +33,7 @@
 #define UTF_SIZ       4
 #define ESC_BUF_SIZ   (128*UTF_SIZ)
 #define ESC_ARG_SIZ   16
+#define CAR_PER_ARG   4
 #define STR_BUF_SIZ   ESC_BUF_SIZ
 #define STR_ARG_SIZ   ESC_ARG_SIZ
 
@@ -139,6 +140,7 @@ typedef struct {
 	int arg[ESC_ARG_SIZ];
 	int narg;              /* nb of args */
 	char mode[2];
+	int carg[ESC_ARG_SIZ][CAR_PER_ARG]; /* colon args */
 } CSIEscape;
 
 /* STR Escape sequence structs */
@@ -159,6 +161,7 @@ static void ttywriteraw(const char *, size_t);
 
 static void csidump(void);
 static void csihandle(void);
+static void readcolonargs(char **, int, int[][CAR_PER_ARG]);
 static void csiparse(void);
 static void csireset(void);
 static void osc_color_response(int, int, int);
@@ -1127,6 +1130,28 @@ tnewline(int first_col)
 	tmoveto(first_col ? 0 : term.c.x, y);
 }
 
+void
+readcolonargs(char **p, int cursor, int params[][CAR_PER_ARG])
+{
+	int i = 0;
+	for (; i < CAR_PER_ARG; i++)
+		params[cursor][i] = -1;
+
+	if (**p != ':')
+		return;
+
+	char *np = NULL;
+	i = 0;
+
+	while (**p == ':' && i < CAR_PER_ARG) {
+		while (**p == ':')
+			(*p)++;
+		params[cursor][i] = strtol(*p, &np, 10);
+		*p = np;
+		i++;
+	}
+}
+
 void
 csiparse(void)
 {
@@ -1149,6 +1174,7 @@ csiparse(void)
 			v = -1;
 		csiescseq.arg[csiescseq.narg++] = v;
 		p = np;
+		readcolonargs(&p, csiescseq.narg-1, csiescseq.carg);
 		if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
 			break;
 		p++;
@@ -1215,6 +1241,9 @@ tsetchar(Rune u, const Glyph *attr, int x, int y)
 	term.dirty[y] = 1;
 	term.line[y][x] = *attr;
 	term.line[y][x].u = u;
+
+	if (isboxdraw(u))
+		term.line[y][x].mode |= ATTR_BOXDRAW;
 }
 
 void
@@ -1365,6 +1394,10 @@ tsetattr(const int *attr, int l)
 				ATTR_STRUCK     );
 			term.c.attr.fg = defaultfg;
 			term.c.attr.bg = defaultbg;
+			term.c.attr.ustyle = -1;
+			term.c.attr.ucolor[0] = -1;
+			term.c.attr.ucolor[1] = -1;
+			term.c.attr.ucolor[2] = -1;
 			break;
 		case 1:
 			term.c.attr.mode |= ATTR_BOLD;
@@ -1376,7 +1409,14 @@ tsetattr(const int *attr, int l)
 			term.c.attr.mode |= ATTR_ITALIC;
 			break;
 		case 4:
-			term.c.attr.mode |= ATTR_UNDERLINE;
+			term.c.attr.ustyle = csiescseq.carg[i][0];
+
+			if (term.c.attr.ustyle != 0)
+				term.c.attr.mode |= ATTR_UNDERLINE;
+			else
+				term.c.attr.mode &= ~ATTR_UNDERLINE;
+
+			term.c.attr.mode ^= ATTR_DIRTYUNDERLINE;
 			break;
 		case 5: /* slow blink */
 			/* FALLTHROUGH */
@@ -1427,6 +1467,18 @@ tsetattr(const int *attr, int l)
 		case 49:
 			term.c.attr.bg = defaultbg;
 			break;
+		case 58:
+			term.c.attr.ucolor[0] = csiescseq.carg[i][1];
+			term.c.attr.ucolor[1] = csiescseq.carg[i][2];
+			term.c.attr.ucolor[2] = csiescseq.carg[i][3];
+			term.c.attr.mode ^= ATTR_DIRTYUNDERLINE;
+			break;
+		case 59:
+			term.c.attr.ucolor[0] = -1;
+			term.c.attr.ucolor[1] = -1;
+			term.c.attr.ucolor[2] = -1;
+			term.c.attr.mode ^= ATTR_DIRTYUNDERLINE;
+			break;
 		default:
 			if (BETWEEN(attr[i], 30, 37)) {
 				term.c.attr.fg = attr[i] - 30;
@@ -1809,6 +1861,33 @@ csihandle(void)
 			goto unknown;
 		}
 		break;
+	case 't': /* title stack operations */
+		switch (csiescseq.arg[0]) {
+		case 22: /* pust current title on stack */
+			switch (csiescseq.arg[1]) {
+			case 0:
+			case 1:
+			case 2:
+				xpushtitle();
+				break;
+			default:
+				goto unknown;
+			}
+			break;
+		case 23: /* pop last title from stack */
+			switch (csiescseq.arg[1]) {
+			case 0:
+			case 1:
+			case 2:
+				xsettitle(NULL, 1);
+				break;
+			default:
+				goto unknown;
+			}
+			break;
+		default:
+			goto unknown;
+		}
 	}
 }
 
@@ -1887,7 +1966,7 @@ strhandle(void)
 		switch (par) {
 		case 0:
 			if (narg > 1) {
-				xsettitle(strescseq.args[1]);
+				xsettitle(strescseq.args[1], 0);
 				xseticontitle(strescseq.args[1]);
 			}
 			return;
@@ -1897,7 +1976,7 @@ strhandle(void)
 			return;
 		case 2:
 			if (narg > 1)
-				xsettitle(strescseq.args[1]);
+				xsettitle(strescseq.args[1], 0);
 			return;
 		case 52:
 			if (narg > 2 && allowwindowops) {
@@ -1956,7 +2035,7 @@ strhandle(void)
 		}
 		break;
 	case 'k': /* old title set compatibility */
-		xsettitle(strescseq.args[0]);
+		xsettitle(strescseq.args[0], 0);
 		return;
 	case 'P': /* DCS -- Device Control String */
 	case '_': /* APC -- Application Program Command */
@@ -2328,6 +2407,7 @@ eschandle(uchar ascii)
 		break;
 	case 'c': /* RIS -- Reset to initial state */
 		treset();
+		xfreetitlestack();
 		resettitle();
 		xloadcols();
 		break;
@@ -2617,7 +2697,7 @@ tresize(int col, int row)
 void
 resettitle(void)
 {
-	xsettitle(NULL);
+	xsettitle(NULL, 0);
 }
 
 void
@@ -2652,7 +2732,8 @@ draw(void)
 
 	drawregion(0, 0, term.col, term.row);
 	xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
-			term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
+			term.ocx, term.ocy, term.line[term.ocy][term.ocx],
+			term.line[term.ocy], term.col);
 	term.ocx = cx;
 	term.ocy = term.c.y;
 	xfinishdraw();

st.h

@@ -11,7 +11,8 @@
 #define DIVCEIL(n, d)		(((n) + ((d) - 1)) / (d))
 #define DEFAULT(a, b)		(a) = (a) ? (a) : (b)
 #define LIMIT(x, a, b)		(x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
-#define ATTRCMP(a, b)		((a).mode != (b).mode || (a).fg != (b).fg || \
+#define ATTRCMP(a, b)		(((a).mode & (~ATTR_WRAP)) != ((b).mode & (~ATTR_WRAP)) || \
+				(a).fg != (b).fg || \
 				(a).bg != (b).bg)
 #define TIMEDIFF(t1, t2)	((t1.tv_sec-t2.tv_sec)*1000 + \
 				(t1.tv_nsec-t2.tv_nsec)/1E6)
@@ -33,7 +34,10 @@ enum glyph_attribute {
 	ATTR_WRAP       = 1 << 8,
 	ATTR_WIDE       = 1 << 9,
 	ATTR_WDUMMY     = 1 << 10,
+	ATTR_BOXDRAW    = 1 << 11,
+	ATTR_SELECTED   = 1 << 12,
 	ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
+	ATTR_DIRTYUNDERLINE = 1 << 15,
 };
 
 enum selection_mode {
@@ -65,6 +69,8 @@ typedef struct {
 	ushort mode;      /* attribute flags */
 	uint32_t fg;      /* foreground  */
 	uint32_t bg;      /* background  */
+	int ustyle;	  /* underline style */
+	int ucolor[3];    /* underline color */
 } Glyph;
 
 typedef Glyph *Line;
@@ -111,6 +117,14 @@ void *xmalloc(size_t);
 void *xrealloc(void *, size_t);
 char *xstrdup(const char *);
 
+int isboxdraw(Rune);
+ushort boxdrawindex(const Glyph *);
+#ifdef XFT_VERSION
+/* only exposed to x.c, otherwise we'll need Xft.h for the types */
+void boxdraw_xinit(Display *, Colormap, XftDraw *, Visual *);
+void drawboxes(int, int, int, int, XftColor *, XftColor *, const XftGlyphFontSpec *, int);
+#endif
+
 /* config.h globals */
 extern char *utmp;
 extern char *scroll;
@@ -124,3 +138,4 @@ extern unsigned int tabspaces;
 extern unsigned int defaultfg;
 extern unsigned int defaultbg;
 extern unsigned int defaultcs;
+extern const int boxdraw, boxdraw_bold, boxdraw_braille;

st.info

@@ -1,4 +1,5 @@
 st-mono| simpleterm monocolor,
+	Su,
 	acsc=+C\,D-A.B0E``aaffgghFiGjjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~,
 	am,
 	bce,
@@ -161,7 +162,7 @@ st-mono| simpleterm monocolor,
 	rin=\E[%p1%dT,
 	ritm=\E[23m,
 	rmacs=\E(B,
-	rmcup=\E[?1049l,
+	rmcup=\E[?1049l\E[23;0;0t,
 	rmir=\E[4l,
 	rmkx=\E[?1l\E>,
 	rmso=\E[27m,
@@ -172,7 +173,7 @@ st-mono| simpleterm monocolor,
 	sitm=\E[3m,
 	sgr0=\E[0m,
 	smacs=\E(0,
-	smcup=\E[?1049h,
+	smcup=\E[?1049h\E[22;0;0t,
 	smir=\E[4h,
 	smkx=\E[?1h\E=,
 	smso=\E[7m,

win.h

@@ -25,14 +25,16 @@ enum win_mode {
 
 void xbell(void);
 void xclipcopy(void);
-void xdrawcursor(int, int, Glyph, int, int, Glyph);
+void xdrawcursor(int, int, Glyph, int, int, Glyph, Line, int);
 void xdrawline(Line, int, int, int);
 void xfinishdraw(void);
 void xloadcols(void);
 int xsetcolorname(int, const char *);
 int xgetcolor(int, unsigned char *, unsigned char *, unsigned char *);
 void xseticontitle(char *);
-void xsettitle(char *);
+void xfreetitlestack(void);
+void xsettitle(char *, int);
+void xpushtitle(void);
 int xsetcursor(int);
 void xsetmode(int, unsigned int);
 void xsetpointermotion(int);