Adding patches folder

10 files changed, 1935 insertions, 0 deletions

diff --git a/patches/01st-xresources-20200604-9ba7ecf.diff b/patches/01st-xresources-20200604-9ba7ecf.diff
new file mode 100644
index 0000000..78ba00a
--- /dev/null
+++ b/patches/01st-xresources-20200604-9ba7ecf.diff
@@ -0,0 +1,184 @@
+From 2752a599ee01305a435729bfacf43b1dde7cf0ef Mon Sep 17 00:00:00 2001
+From: Benji Encalada Mora <benji@encalada.dev>
+Date: Thu, 4 Jun 2020 00:41:10 -0500
+Subject: [PATCH] fix: replace xfps and actionfps variables
+
+---
+ config.def.h | 36 ++++++++++++++++++++++++
+ x.c          | 78 +++++++++++++++++++++++++++++++++++++++++++++++++---
+ 2 files changed, 110 insertions(+), 4 deletions(-)
+
+diff --git a/config.def.h b/config.def.h
+index 6f05dce..9b99782 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -168,6 +168,42 @@ static unsigned int defaultattr = 11;
+  */
+ static uint forcemousemod = ShiftMask;
+ 
++/*
++ * Xresources preferences to load at startup
++ */
++ResourcePref resources[] = {
++		{ "font",         STRING,  &font },
++		{ "color0",       STRING,  &colorname[0] },
++		{ "color1",       STRING,  &colorname[1] },
++		{ "color2",       STRING,  &colorname[2] },
++		{ "color3",       STRING,  &colorname[3] },
++		{ "color4",       STRING,  &colorname[4] },
++		{ "color5",       STRING,  &colorname[5] },
++		{ "color6",       STRING,  &colorname[6] },
++		{ "color7",       STRING,  &colorname[7] },
++		{ "color8",       STRING,  &colorname[8] },
++		{ "color9",       STRING,  &colorname[9] },
++		{ "color10",      STRING,  &colorname[10] },
++		{ "color11",      STRING,  &colorname[11] },
++		{ "color12",      STRING,  &colorname[12] },
++		{ "color13",      STRING,  &colorname[13] },
++		{ "color14",      STRING,  &colorname[14] },
++		{ "color15",      STRING,  &colorname[15] },
++		{ "background",   STRING,  &colorname[256] },
++		{ "foreground",   STRING,  &colorname[257] },
++		{ "cursorColor",  STRING,  &colorname[258] },
++		{ "termname",     STRING,  &termname },
++		{ "shell",        STRING,  &shell },
++		{ "minlatency",   INTEGER, &minlatency },
++		{ "maxlatency",   INTEGER, &maxlatency },
++		{ "blinktimeout", INTEGER, &blinktimeout },
++		{ "bellvolume",   INTEGER, &bellvolume },
++		{ "tabspaces",    INTEGER, &tabspaces },
++		{ "borderpx",     INTEGER, &borderpx },
++		{ "cwscale",      FLOAT,   &cwscale },
++		{ "chscale",      FLOAT,   &chscale },
++};
++
+ /*
+  * Internal mouse shortcuts.
+  * Beware that overloading Button1 will disable the selection.
+diff --git a/x.c b/x.c
+index 210f184..76f167f 100644
+--- a/x.c
++++ b/x.c
+@@ -14,6 +14,7 @@
+ #include <X11/keysym.h>
+ #include <X11/Xft/Xft.h>
+ #include <X11/XKBlib.h>
++#include <X11/Xresource.h>
+ 
+ char *argv0;
+ #include "arg.h"
+@@ -45,6 +46,19 @@ typedef struct {
+ 	signed char appcursor; /* application cursor */
+ } Key;
+ 
++/* Xresources preferences */
++enum resource_type {
++	STRING = 0,
++	INTEGER = 1,
++	FLOAT = 2
++};
++
++typedef struct {
++	char *name;
++	enum resource_type type;
++	void *dst;
++} ResourcePref;
++
+ /* X modifiers */
+ #define XK_ANY_MOD    UINT_MAX
+ #define XK_NO_MOD     0
+@@ -828,8 +842,8 @@ xclear(int x1, int y1, int x2, int y2)
+ void
+ xhints(void)
+ {
+-	XClassHint class = {opt_name ? opt_name : termname,
+-	                    opt_class ? opt_class : termname};
++	XClassHint class = {opt_name ? opt_name : "st",
++	                    opt_class ? opt_class : "St"};
+ 	XWMHints wm = {.flags = InputHint, .input = 1};
+ 	XSizeHints *sizeh;
+ 
+@@ -1104,8 +1118,6 @@ xinit(int cols, int rows)
+ 	pid_t thispid = getpid();
+ 	XColor xmousefg, xmousebg;
+ 
+-	if (!(xw.dpy = XOpenDisplay(NULL)))
+-		die("can't open display\n");
+ 	xw.scr = XDefaultScreen(xw.dpy);
+ 	xw.vis = XDefaultVisual(xw.dpy, xw.scr);
+ 
+@@ -1964,6 +1976,59 @@ run(void)
+ 	}
+ }
+ 
++int
++resource_load(XrmDatabase db, char *name, enum resource_type rtype, void *dst)
++{
++	char **sdst = dst;
++	int *idst = dst;
++	float *fdst = dst;
++
++	char fullname[256];
++	char fullclass[256];
++	char *type;
++	XrmValue ret;
++
++	snprintf(fullname, sizeof(fullname), "%s.%s",
++			opt_name ? opt_name : "st", name);
++	snprintf(fullclass, sizeof(fullclass), "%s.%s",
++			opt_class ? opt_class : "St", name);
++	fullname[sizeof(fullname) - 1] = fullclass[sizeof(fullclass) - 1] = '\0';
++
++	XrmGetResource(db, fullname, fullclass, &type, &ret);
++	if (ret.addr == NULL || strncmp("String", type, 64))
++		return 1;
++
++	switch (rtype) {
++	case STRING:
++		*sdst = ret.addr;
++		break;
++	case INTEGER:
++		*idst = strtoul(ret.addr, NULL, 10);
++		break;
++	case FLOAT:
++		*fdst = strtof(ret.addr, NULL);
++		break;
++	}
++	return 0;
++}
++
++void
++config_init(void)
++{
++	char *resm;
++	XrmDatabase db;
++	ResourcePref *p;
++
++	XrmInitialize();
++	resm = XResourceManagerString(xw.dpy);
++	if (!resm)
++		return;
++
++	db = XrmGetStringDatabase(resm);
++	for (p = resources; p < resources + LEN(resources); p++)
++		resource_load(db, p->name, p->type, p->dst);
++}
++
+ void
+ usage(void)
+ {
+@@ -2037,6 +2102,11 @@ run:
+ 
+ 	setlocale(LC_CTYPE, "");
+ 	XSetLocaleModifiers("");
++
++	if(!(xw.dpy = XOpenDisplay(NULL)))
++		die("Can't open display\n");
++
++	config_init();
+ 	cols = MAX(cols, 1);
+ 	rows = MAX(rows, 1);
+ 	tnew(cols, rows);
+-- 
+2.26.2
+
diff --git a/patches/02nd-anysize-0.8.4.diff b/patches/02nd-anysize-0.8.4.diff
new file mode 100644
index 0000000..2f9a291
--- /dev/null
+++ b/patches/02nd-anysize-0.8.4.diff
@@ -0,0 +1,152 @@
+diff --git a/x.c b/x.c
+index 8bf998e..e2cda07 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;
+ }
+@@ -723,6 +724,9 @@ 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);
+@@ -840,8 +844,8 @@ 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;
+@@ -1123,8 +1127,8 @@ 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)
+@@ -1213,7 +1217,7 @@ 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;
+@@ -1346,7 +1350,7 @@ 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;
+@@ -1436,17 +1440,17 @@ 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.vborderpx,
+ 			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. */
+@@ -1540,35 +1544,35 @@ 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);
+ 	}
+ }
diff --git a/patches/03rd-bold-is-not-bright-20190127-3be4cf1.diff b/patches/03rd-bold-is-not-bright-20190127-3be4cf1.diff
new file mode 100644
index 0000000..dd3e5bf
--- /dev/null
+++ b/patches/03rd-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
+
diff --git a/patches/04th-font2-20190416-ba72400.diff b/patches/04th-font2-20190416-ba72400.diff
new file mode 100644
index 0000000..c7a2950
--- /dev/null
+++ b/patches/04th-font2-20190416-ba72400.diff
@@ -0,0 +1,167 @@
+From ba724004c6a368e452114f7dc147a9978fe0f3b4 Mon Sep 17 00:00:00 2001
+From: Kirill Bugaev <kirill.bugaev87@gmail.com>
+Date: Tue, 16 Apr 2019 04:31:30 +0800
+Subject: [PATCH] This patch allows to add spare font besides default. Some
+ glyphs can be not present in default font. For this glyphs st uses
+ font-config and try to find them in font cache first. This patch append fonts
+ defined in font2 variable to the beginning of font cache. So they will be
+ used first for glyphs that absent in default font.
+
+---
+ config.def.h |   6 +++
+ x.c          | 101 +++++++++++++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 107 insertions(+)
+
+diff --git a/config.def.h b/config.def.h
+index 482901e..676719e 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -6,6 +6,12 @@
+  * font: see http://freedesktop.org/software/fontconfig/fontconfig-user.html
+  */
+ static char *font = "Liberation Mono:pixelsize=12:antialias=true:autohint=true";
++/* Spare fonts */
++static char *font2[] = {
++/*	"Inconsolata for Powerline:pixelsize=12:antialias=true:autohint=true", */
++/*	"Hack Nerd Font Mono:pixelsize=11:antialias=true:autohint=true", */
++};
++
+ static int borderpx = 2;
+ 
+ /*
+diff --git a/x.c b/x.c
+index 5828a3b..d37e59d 100644
+--- a/x.c
++++ b/x.c
+@@ -149,6 +149,8 @@ static void xhints(void);
+ static int xloadcolor(int, const char *, Color *);
+ static int xloadfont(Font *, FcPattern *);
+ static void xloadfonts(char *, double);
++static int xloadsparefont(FcPattern *, int);
++static void xloadsparefonts(void);
+ static void xunloadfont(Font *);
+ static void xunloadfonts(void);
+ static void xsetenv(void);
+@@ -296,6 +298,7 @@ zoomabs(const Arg *arg)
+ {
+ 	xunloadfonts();
+ 	xloadfonts(usedfont, arg->f);
++	xloadsparefonts();
+ 	cresize(0, 0);
+ 	redraw();
+ 	xhints();
+@@ -977,6 +980,101 @@ xloadfonts(char *fontstr, double fontsize)
+ 	FcPatternDestroy(pattern);
+ }
+ 
++int
++xloadsparefont(FcPattern *pattern, int flags)
++{
++	FcPattern *match;
++	FcResult result;
++	
++	match = FcFontMatch(NULL, pattern, &result);
++	if (!match) {
++		return 1;
++	}
++
++	if (!(frc[frclen].font = XftFontOpenPattern(xw.dpy, match))) {
++		FcPatternDestroy(match);
++		return 1;
++	}
++
++	frc[frclen].flags = flags;
++	/* Believe U+0000 glyph will present in each default font */
++	frc[frclen].unicodep = 0;
++	frclen++;
++
++	return 0;
++}
++
++void
++xloadsparefonts(void)
++{
++	FcPattern *pattern;
++	double sizeshift, fontval;
++	int fc;
++	char **fp;
++
++	if (frclen != 0)
++		die("can't embed spare fonts. cache isn't empty");
++
++	/* Calculate count of spare fonts */
++	fc = sizeof(font2) / sizeof(*font2);
++	if (fc == 0)
++		return;
++
++	/* Allocate memory for cache entries. */
++	if (frccap < 4 * fc) {
++		frccap += 4 * fc - frccap;
++		frc = xrealloc(frc, frccap * sizeof(Fontcache));
++	}
++
++	for (fp = font2; fp - font2 < fc; ++fp) {
++	
++		if (**fp == '-')
++			pattern = XftXlfdParse(*fp, False, False);
++		else
++			pattern = FcNameParse((FcChar8 *)*fp);
++	
++		if (!pattern)
++			die("can't open spare font %s\n", *fp);
++	   		
++		if (defaultfontsize > 0) {
++			sizeshift = usedfontsize - defaultfontsize;
++			if (sizeshift != 0 &&
++					FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
++					FcResultMatch) {	
++				fontval += sizeshift;
++				FcPatternDel(pattern, FC_PIXEL_SIZE);
++				FcPatternDel(pattern, FC_SIZE);
++				FcPatternAddDouble(pattern, FC_PIXEL_SIZE, fontval);
++			}
++		}
++	
++		FcPatternAddBool(pattern, FC_SCALABLE, 1);
++	
++		FcConfigSubstitute(NULL, pattern, FcMatchPattern);
++		XftDefaultSubstitute(xw.dpy, xw.scr, pattern);
++	
++		if (xloadsparefont(pattern, FRC_NORMAL))
++			die("can't open spare font %s\n", *fp);
++	
++		FcPatternDel(pattern, FC_SLANT);
++		FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
++		if (xloadsparefont(pattern, FRC_ITALIC))
++			die("can't open spare font %s\n", *fp);
++			
++		FcPatternDel(pattern, FC_WEIGHT);
++		FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
++		if (xloadsparefont(pattern, FRC_ITALICBOLD))
++			die("can't open spare font %s\n", *fp);
++	
++		FcPatternDel(pattern, FC_SLANT);
++		FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
++		if (xloadsparefont(pattern, FRC_BOLD))
++			die("can't open spare font %s\n", *fp);
++	
++		FcPatternDestroy(pattern);
++	}
++}
++
+ void
+ xunloadfont(Font *f)
+ {
+@@ -1057,6 +1155,9 @@ xinit(int cols, int rows)
+ 	usedfont = (opt_font == NULL)? font : opt_font;
+ 	xloadfonts(usedfont, 0);
+ 
++	/* spare fonts */
++	xloadsparefonts();
++
+ 	/* colors */
+ 	xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
+ 	xloadcols();
+-- 
+2.21.0
+
diff --git a/patches/05th-scrollback-0.8.4.diff b/patches/05th-scrollback-0.8.4.diff
new file mode 100644
index 0000000..88e0c79
--- /dev/null
+++ b/patches/05th-scrollback-0.8.4.diff
@@ -0,0 +1,351 @@
+diff --git a/config.def.h b/config.def.h
+index 6f05dce..93cbcc0 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -199,6 +199,8 @@ static Shortcut shortcuts[] = {
+ 	{ TERMMOD,              XK_Y,           selpaste,       {.i =  0} },
+ 	{ ShiftMask,            XK_Insert,      selpaste,       {.i =  0} },
+ 	{ TERMMOD,              XK_Num_Lock,    numlock,        {.i =  0} },
++	{ ShiftMask,            XK_Page_Up,     kscrollup,      {.i = -1} },
++	{ ShiftMask,            XK_Page_Down,   kscrolldown,    {.i = -1} },
+ };
+ 
+ /*
+diff --git a/st.c b/st.c
+index 76b7e0d..edec064 100644
+--- a/st.c
++++ b/st.c
+@@ -35,6 +35,7 @@
+ #define ESC_ARG_SIZ   16
+ #define STR_BUF_SIZ   ESC_BUF_SIZ
+ #define STR_ARG_SIZ   ESC_ARG_SIZ
++#define HISTSIZE      2000
+ 
+ /* macros */
+ #define IS_SET(flag)		((term.mode & (flag)) != 0)
+@@ -42,6 +43,9 @@
+ #define ISCONTROLC1(c)		(BETWEEN(c, 0x80, 0x9f))
+ #define ISCONTROL(c)		(ISCONTROLC0(c) || ISCONTROLC1(c))
+ #define ISDELIM(u)		(u && wcschr(worddelimiters, u))
++#define TLINE(y)		((y) < term.scr ? term.hist[((y) + term.histi - \
++				term.scr + HISTSIZE + 1) % HISTSIZE] : \
++				term.line[(y) - term.scr])
+ 
+ enum term_mode {
+ 	MODE_WRAP        = 1 << 0,
+@@ -115,6 +119,9 @@ typedef struct {
+ 	int col;      /* nb col */
+ 	Line *line;   /* screen */
+ 	Line *alt;    /* alternate screen */
++	Line hist[HISTSIZE]; /* history buffer */
++	int histi;    /* history index */
++	int scr;      /* scroll back */
+ 	int *dirty;   /* dirtyness of lines */
+ 	TCursor c;    /* cursor */
+ 	int ocx;      /* old cursor col */
+@@ -184,8 +191,8 @@ static void tnewline(int);
+ static void tputtab(int);
+ static void tputc(Rune);
+ static void treset(void);
+-static void tscrollup(int, int);
+-static void tscrolldown(int, int);
++static void tscrollup(int, int, int);
++static void tscrolldown(int, int, int);
+ static void tsetattr(int *, int);
+ static void tsetchar(Rune, Glyph *, int, int);
+ static void tsetdirt(int, int);
+@@ -414,10 +421,10 @@ tlinelen(int y)
+ {
+ 	int i = term.col;
+ 
+-	if (term.line[y][i - 1].mode & ATTR_WRAP)
++	if (TLINE(y)[i - 1].mode & ATTR_WRAP)
+ 		return i;
+ 
+-	while (i > 0 && term.line[y][i - 1].u == ' ')
++	while (i > 0 && TLINE(y)[i - 1].u == ' ')
+ 		--i;
+ 
+ 	return i;
+@@ -526,7 +533,7 @@ selsnap(int *x, int *y, int direction)
+ 		 * Snap around if the word wraps around at the end or
+ 		 * beginning of a line.
+ 		 */
+-		prevgp = &term.line[*y][*x];
++		prevgp = &TLINE(*y)[*x];
+ 		prevdelim = ISDELIM(prevgp->u);
+ 		for (;;) {
+ 			newx = *x + direction;
+@@ -541,14 +548,14 @@ selsnap(int *x, int *y, int direction)
+ 					yt = *y, xt = *x;
+ 				else
+ 					yt = newy, xt = newx;
+-				if (!(term.line[yt][xt].mode & ATTR_WRAP))
++				if (!(TLINE(yt)[xt].mode & ATTR_WRAP))
+ 					break;
+ 			}
+ 
+ 			if (newx >= tlinelen(newy))
+ 				break;
+ 
+-			gp = &term.line[newy][newx];
++			gp = &TLINE(newy)[newx];
+ 			delim = ISDELIM(gp->u);
+ 			if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
+ 					|| (delim && gp->u != prevgp->u)))
+@@ -569,14 +576,14 @@ selsnap(int *x, int *y, int direction)
+ 		*x = (direction < 0) ? 0 : term.col - 1;
+ 		if (direction < 0) {
+ 			for (; *y > 0; *y += direction) {
+-				if (!(term.line[*y-1][term.col-1].mode
++				if (!(TLINE(*y-1)[term.col-1].mode
+ 						& ATTR_WRAP)) {
+ 					break;
+ 				}
+ 			}
+ 		} else if (direction > 0) {
+ 			for (; *y < term.row-1; *y += direction) {
+-				if (!(term.line[*y][term.col-1].mode
++				if (!(TLINE(*y)[term.col-1].mode
+ 						& ATTR_WRAP)) {
+ 					break;
+ 				}
+@@ -607,13 +614,13 @@ getsel(void)
+ 		}
+ 
+ 		if (sel.type == SEL_RECTANGULAR) {
+-			gp = &term.line[y][sel.nb.x];
++			gp = &TLINE(y)[sel.nb.x];
+ 			lastx = sel.ne.x;
+ 		} else {
+-			gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
++			gp = &TLINE(y)[sel.nb.y == y ? sel.nb.x : 0];
+ 			lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
+ 		}
+-		last = &term.line[y][MIN(lastx, linelen-1)];
++		last = &TLINE(y)[MIN(lastx, linelen-1)];
+ 		while (last >= gp && last->u == ' ')
+ 			--last;
+ 
+@@ -848,6 +855,9 @@ void
+ ttywrite(const char *s, size_t n, int may_echo)
+ {
+ 	const char *next;
++	Arg arg = (Arg) { .i = term.scr };
++
++	kscrolldown(&arg);
+ 
+ 	if (may_echo && IS_SET(MODE_ECHO))
+ 		twrite(s, n, 1);
+@@ -1059,13 +1069,53 @@ tswapscreen(void)
+ }
+ 
+ void
+-tscrolldown(int orig, int n)
++kscrolldown(const Arg* a)
++{
++	int n = a->i;
++
++	if (n < 0)
++		n = term.row + n;
++
++	if (n > term.scr)
++		n = term.scr;
++
++	if (term.scr > 0) {
++		term.scr -= n;
++		selscroll(0, -n);
++		tfulldirt();
++	}
++}
++
++void
++kscrollup(const Arg* a)
++{
++	int n = a->i;
++
++	if (n < 0)
++		n = term.row + n;
++
++	if (term.scr <= HISTSIZE-n) {
++		term.scr += n;
++		selscroll(0, n);
++		tfulldirt();
++	}
++}
++
++void
++tscrolldown(int orig, int n, int copyhist)
+ {
+ 	int i;
+ 	Line temp;
+ 
+ 	LIMIT(n, 0, term.bot-orig+1);
+ 
++	if (copyhist) {
++		term.histi = (term.histi - 1 + HISTSIZE) % HISTSIZE;
++		temp = term.hist[term.histi];
++		term.hist[term.histi] = term.line[term.bot];
++		term.line[term.bot] = temp;
++	}
++
+ 	tsetdirt(orig, term.bot-n);
+ 	tclearregion(0, term.bot-n+1, term.col-1, term.bot);
+ 
+@@ -1075,17 +1125,28 @@ tscrolldown(int orig, int n)
+ 		term.line[i-n] = temp;
+ 	}
+ 
+-	selscroll(orig, n);
++	if (term.scr == 0)
++		selscroll(orig, n);
+ }
+ 
+ void
+-tscrollup(int orig, int n)
++tscrollup(int orig, int n, int copyhist)
+ {
+ 	int i;
+ 	Line temp;
+ 
+ 	LIMIT(n, 0, term.bot-orig+1);
+ 
++	if (copyhist) {
++		term.histi = (term.histi + 1) % HISTSIZE;
++		temp = term.hist[term.histi];
++		term.hist[term.histi] = term.line[orig];
++		term.line[orig] = temp;
++	}
++
++	if (term.scr > 0 && term.scr < HISTSIZE)
++		term.scr = MIN(term.scr + n, HISTSIZE-1);
++
+ 	tclearregion(0, orig, term.col-1, orig+n-1);
+ 	tsetdirt(orig+n, term.bot);
+ 
+@@ -1095,7 +1156,8 @@ tscrollup(int orig, int n)
+ 		term.line[i+n] = temp;
+ 	}
+ 
+-	selscroll(orig, -n);
++	if (term.scr == 0)
++		selscroll(orig, -n);
+ }
+ 
+ void
+@@ -1124,7 +1186,7 @@ tnewline(int first_col)
+ 	int y = term.c.y;
+ 
+ 	if (y == term.bot) {
+-		tscrollup(term.top, 1);
++		tscrollup(term.top, 1, 1);
+ 	} else {
+ 		y++;
+ 	}
+@@ -1289,14 +1351,14 @@ void
+ tinsertblankline(int n)
+ {
+ 	if (BETWEEN(term.c.y, term.top, term.bot))
+-		tscrolldown(term.c.y, n);
++		tscrolldown(term.c.y, n, 0);
+ }
+ 
+ void
+ tdeleteline(int n)
+ {
+ 	if (BETWEEN(term.c.y, term.top, term.bot))
+-		tscrollup(term.c.y, n);
++		tscrollup(term.c.y, n, 0);
+ }
+ 
+ int32_t
+@@ -1733,11 +1795,11 @@ csihandle(void)
+ 		break;
+ 	case 'S': /* SU -- Scroll <n> line up */
+ 		DEFAULT(csiescseq.arg[0], 1);
+-		tscrollup(term.top, csiescseq.arg[0]);
++		tscrollup(term.top, csiescseq.arg[0], 0);
+ 		break;
+ 	case 'T': /* SD -- Scroll <n> line down */
+ 		DEFAULT(csiescseq.arg[0], 1);
+-		tscrolldown(term.top, csiescseq.arg[0]);
++		tscrolldown(term.top, csiescseq.arg[0], 0);
+ 		break;
+ 	case 'L': /* IL -- Insert <n> blank lines */
+ 		DEFAULT(csiescseq.arg[0], 1);
+@@ -2241,7 +2303,7 @@ eschandle(uchar ascii)
+ 		return 0;
+ 	case 'D': /* IND -- Linefeed */
+ 		if (term.c.y == term.bot) {
+-			tscrollup(term.top, 1);
++			tscrollup(term.top, 1, 1);
+ 		} else {
+ 			tmoveto(term.c.x, term.c.y+1);
+ 		}
+@@ -2254,7 +2316,7 @@ eschandle(uchar ascii)
+ 		break;
+ 	case 'M': /* RI -- Reverse index */
+ 		if (term.c.y == term.top) {
+-			tscrolldown(term.top, 1);
++			tscrolldown(term.top, 1, 1);
+ 		} else {
+ 			tmoveto(term.c.x, term.c.y-1);
+ 		}
+@@ -2464,7 +2526,7 @@ twrite(const char *buf, int buflen, int show_ctrl)
+ void
+ tresize(int col, int row)
+ {
+-	int i;
++	int i, j;
+ 	int minrow = MIN(row, term.row);
+ 	int mincol = MIN(col, term.col);
+ 	int *bp;
+@@ -2501,6 +2563,14 @@ tresize(int col, int row)
+ 	term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
+ 	term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
+ 
++	for (i = 0; i < HISTSIZE; i++) {
++		term.hist[i] = xrealloc(term.hist[i], col * sizeof(Glyph));
++		for (j = mincol; j < col; j++) {
++			term.hist[i][j] = term.c.attr;
++			term.hist[i][j].u = ' ';
++		}
++	}
++
+ 	/* resize each row to new width, zero-pad if needed */
+ 	for (i = 0; i < minrow; i++) {
+ 		term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
+@@ -2559,7 +2629,7 @@ drawregion(int x1, int y1, int x2, int y2)
+ 			continue;
+ 
+ 		term.dirty[y] = 0;
+-		xdrawline(term.line[y], x1, y, x2);
++		xdrawline(TLINE(y), x1, y, x2);
+ 	}
+ }
+ 
+@@ -2580,8 +2650,9 @@ draw(void)
+ 		cx--;
+ 
+ 	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]);
++	if (term.scr == 0)
++		xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
++				term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
+ 	term.ocx = cx;
+ 	term.ocy = term.c.y;
+ 	xfinishdraw();
+diff --git a/st.h b/st.h
+index 3d351b6..f44e1d3 100644
+--- a/st.h
++++ b/st.h
+@@ -81,6 +81,8 @@ void die(const char *, ...);
+ void redraw(void);
+ void draw(void);
+ 
++void kscrolldown(const Arg *);
++void kscrollup(const Arg *);
+ void printscreen(const Arg *);
+ void printsel(const Arg *);
+ void sendbreak(const Arg *);
diff --git a/patches/06th-scrollback-mouse-20191024-a2c479c.diff b/patches/06th-scrollback-mouse-20191024-a2c479c.diff
new file mode 100644
index 0000000..49eba8e
--- /dev/null
+++ b/patches/06th-scrollback-mouse-20191024-a2c479c.diff
@@ -0,0 +1,13 @@
+diff --git a/config.def.h b/config.def.h
+index ec1b576..4b3bf15 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -163,6 +163,8 @@ static uint forcemousemod = ShiftMask;
+  */
+ static MouseShortcut mshortcuts[] = {
+ 	/* mask                 button   function        argument       release */
++	{ ShiftMask,            Button4, kscrollup,      {.i = 1} },
++	{ ShiftMask,            Button5, kscrolldown,    {.i = 1} },
+ 	{ XK_ANY_MOD,           Button2, selpaste,       {.i = 0},      1 },
+ 	{ XK_ANY_MOD,           Button4, ttysend,        {.s = "\031"} },
+ 	{ XK_ANY_MOD,           Button5, ttysend,        {.s = "\005"} },
diff --git a/patches/07th-st-boxdraw_v2-0.8.5.diff b/patches/07th-st-boxdraw_v2-0.8.5.diff
new file mode 100644
index 0000000..1ba0e46
--- /dev/null
+++ b/patches/07th-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
+
diff --git a/patches/08th-ligatures-scrollback-20210824-0.8.4.diff b/patches/08th-ligatures-scrollback-20210824-0.8.4.diff
new file mode 100644
index 0000000..94e842a
--- /dev/null
+++ b/patches/08th-ligatures-scrollback-20210824-0.8.4.diff
@@ -0,0 +1,314 @@
+diff --git a/Makefile b/Makefile
+index 470ac86..38240da 100644
+--- a/Makefile
++++ b/Makefile
+@@ -4,7 +4,7 @@
+ 
+ include config.mk
+ 
+-SRC = st.c x.c
++SRC = st.c x.c hb.c
+ OBJ = $(SRC:.c=.o)
+ 
+ all: options st
+@@ -22,7 +22,8 @@ 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
++hb.o: st.h
+ 
+ $(OBJ): config.h config.mk
+ 
+diff --git a/config.mk b/config.mk
+index c070a4a..3d236f0 100644
+--- a/config.mk
++++ b/config.mk
+@@ -15,10 +15,12 @@ PKG_CONFIG = pkg-config
+ # includes and libs
+ INCS = -I$(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..f9c4f76
+--- /dev/null
++++ b/hb.c
+@@ -0,0 +1,144 @@
++#include <stdlib.h>
++#include <stdio.h>
++#include <math.h>
++#include <X11/Xft/Xft.h>
++#include <hb.h>
++#include <hb-ft.h>
++
++#include "st.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 }
++
++void hbtransformsegment(XftFont *xfont, const Glyph *string, hb_codepoint_t *codepoints, int start, int length);
++hb_font_t *hbfindfont(XftFont *match);
++
++typedef struct {
++	XftFont *match;
++	hb_font_t *font;
++} HbFontMatch;
++
++static int hbfontslen = 0;
++static HbFontMatch *hbfontcache = NULL;
++
++/*
++ * Replace 0 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[] = { 0 };
++
++void
++hbunloadfonts()
++{
++	for (int i = 0; i < hbfontslen; i++) {
++		hb_font_destroy(hbfontcache[i].font);
++		XftUnlockFace(hbfontcache[i].match);
++	}
++
++	if (hbfontcache != NULL) {
++		free(hbfontcache);
++		hbfontcache = NULL;
++	}
++	hbfontslen = 0;
++}
++
++hb_font_t *
++hbfindfont(XftFont *match)
++{
++	for (int i = 0; i < hbfontslen; i++) {
++		if (hbfontcache[i].match == match)
++			return hbfontcache[i].font;
++	}
++
++	/* Font not found in cache, caching it now. */
++	hbfontcache = realloc(hbfontcache, sizeof(HbFontMatch) * (hbfontslen + 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[hbfontslen].match = match;
++	hbfontcache[hbfontslen].font = font;
++	hbfontslen += 1;
++
++	return font;
++}
++
++void
++hbtransform(XftGlyphFontSpec *specs, const Glyph *glyphs, size_t len, int x, int y)
++{
++	int start = 0, length = 1, gstart = 0;
++	hb_codepoint_t *codepoints = calloc((unsigned int)len, sizeof(hb_codepoint_t));
++
++	for (int idx = 1, specidx = 1; idx < len; idx++) {
++		if (glyphs[idx].mode & ATTR_WDUMMY) {
++			length += 1;
++			continue;
++		}
++
++		if (specs[specidx].font != specs[start].font || ATTRCMP(glyphs[gstart], glyphs[idx]) || selected(x + idx, y) != selected(x + gstart, y)) {
++			hbtransformsegment(specs[start].font, glyphs, codepoints, gstart, length);
++
++			/* Reset the sequence. */
++			length = 1;
++			start = specidx;
++			gstart = idx;
++		} else {
++			length += 1;
++		}
++
++		specidx++;
++	}
++
++	/* EOL. */
++	hbtransformsegment(specs[start].font, glyphs, codepoints, gstart, length);
++
++	/* Apply the transformation to glyph specs. */
++	for (int i = 0, specidx = 0; i < len; i++) {
++		if (glyphs[i].mode & ATTR_WDUMMY)
++			continue;
++
++		if (codepoints[i] != specs[specidx].glyph)
++			((Glyph *)glyphs)[i].mode |= ATTR_LIGA;
++
++		specs[specidx++].glyph = codepoints[i];
++	}
++
++	free(codepoints);
++}
++
++void
++hbtransformsegment(XftFont *xfont, const Glyph *string, hb_codepoint_t *codepoints, int start, int length)
++{
++	hb_font_t *font = hbfindfont(xfont);
++	if (font == NULL)
++		return;
++
++	Rune rune;
++	ushort mode = USHRT_MAX;
++	hb_buffer_t *buffer = hb_buffer_create();
++	hb_buffer_set_direction(buffer, HB_DIRECTION_LTR);
++
++	/* Fill buffer with codepoints. */
++	for (int i = start; i < (start+length); i++) {
++		rune = string[i].u;
++		mode = string[i].mode;
++		if (mode & ATTR_WDUMMY)
++			rune = 0x0020;
++		hb_buffer_add_codepoints(buffer, &rune, 1, 0, 1);
++	}
++
++	/* Shape the segment. */
++	hb_shape(font, buffer, features, sizeof(features));
++
++	/* Get new glyph info. */
++	hb_glyph_info_t *info = hb_buffer_get_glyph_infos(buffer, NULL);
++
++	/* Write new codepoints. */
++	for (int i = 0; i < length; i++) {
++		hb_codepoint_t gid = info[i].codepoint;
++		codepoints[start+i] = gid;
++	}
++
++	/* Cleanup. */
++	hb_buffer_destroy(buffer);
++}
+diff --git a/hb.h b/hb.h
+new file mode 100644
+index 0000000..07888df
+--- /dev/null
++++ b/hb.h
+@@ -0,0 +1,6 @@
++#include <X11/Xft/Xft.h>
++#include <hb.h>
++#include <hb-ft.h>
++
++void hbunloadfonts();
++void hbtransform(XftGlyphFontSpec *, const Glyph *, size_t, int, int);
+diff --git a/st.c b/st.c
+index edec064..ea13c13 100644
+--- a/st.c
++++ b/st.c
+@@ -2652,7 +2652,8 @@ draw(void)
+ 	drawregion(0, 0, term.col, term.row);
+ 	if (term.scr == 0)
+ 		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 f44e1d3..00c796c 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) & (~ATTR_LIGA)) != ((b).mode & (~ATTR_WRAP) & (~ATTR_LIGA)) || \
++				(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)
+@@ -33,6 +34,7 @@ enum glyph_attribute {
+ 	ATTR_WRAP       = 1 << 8,
+ 	ATTR_WIDE       = 1 << 9,
+ 	ATTR_WDUMMY     = 1 << 10,
++	ATTR_LIGA       = 1 << 11,
+ 	ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
+ };
+ 
+diff --git a/win.h b/win.h
+index a6ef1b9..bc0d180 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 210f184..f6d67ef 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 {
+@@ -1031,6 +1032,9 @@ 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);
+@@ -1229,7 +1233,7 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x
+ 		mode = glyphs[i].mode;
+ 
+ 		/* Skip dummy wide-character spacing. */
+-		if (mode == ATTR_WDUMMY)
++		if (mode & ATTR_WDUMMY)
+ 			continue;
+ 
+ 		/* Determine font for glyph if different from previous glyph. */
+@@ -1336,6 +1340,9 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x
+ 		numspecs++;
+ 	}
+ 
++	/* Harfbuzz transformation for ligatures. */
++	hbtransform(specs, glyphs, len, x, y);
++
+ 	return numspecs;
+ }
+ 
+@@ -1485,14 +1492,17 @@ 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;
diff --git a/patches/09th-st-dynamic-cursor-color-0.8.4.diff b/patches/09th-st-dynamic-cursor-color-0.8.4.diff
new file mode 100644
index 0000000..a763d6d
--- /dev/null
+++ b/patches/09th-st-dynamic-cursor-color-0.8.4.diff
@@ -0,0 +1,52 @@
+From 01e706efbc13194a4a4404e91b93a9638a3c1bea Mon Sep 17 00:00:00 2001
+From: Kipras Melnikovas <kipras@kipras.org>
+Date: Thu, 25 Feb 2021 14:31:26 +0200
+Subject: [PATCH] refactor dynamic-cursor-color patch
+
+Signed-off-by: Kipras Melnikovas <kipras@kipras.org>
+---
+ x.c | 19 +++++++++++++++++--
+ 1 file changed, 17 insertions(+), 2 deletions(-)
+
+diff --git a/x.c b/x.c
+index 120e495..ab66364 100644
+--- a/x.c
++++ b/x.c
+@@ -1489,6 +1489,7 @@ void
+ xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
+ {
+ 	Color drawcol;
++	XRenderColor colbg;
+ 
+ 	/* remove the old cursor */
+ 	if (selected(ox, oy))
+@@ -1518,10 +1519,24 @@ xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
+ 			g.fg = defaultfg;
+ 			g.bg = defaultrcs;
+ 		} else {
++			/** this is the main part of the dynamic cursor color patch */
++			g.bg = g.fg;
+ 			g.fg = defaultbg;
+-			g.bg = defaultcs;
+ 		}
+-		drawcol = dc.col[g.bg];
++
++		/**
++		 * and this is the second part of the dynamic cursor color patch.
++		 * it handles the `drawcol` variable
++		*/
++		if (IS_TRUECOL(g.bg)) {
++			colbg.alpha = 0xffff;
++			colbg.red = TRUERED(g.bg);
++			colbg.green = TRUEGREEN(g.bg);
++			colbg.blue = TRUEBLUE(g.bg);
++			XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &drawcol);
++		} else {
++			drawcol = dc.col[g.bg];
++		}
+ 	}
+ 
+ 	/* draw the new one */
+-- 
+2.30.1
+
diff --git a/patches/10th-st-externalpipe-0.8.4.diff b/patches/10th-st-externalpipe-0.8.4.diff
new file mode 100644
index 0000000..297d746
--- /dev/null
+++ b/patches/10th-st-externalpipe-0.8.4.diff
@@ -0,0 +1,92 @@
+diff --git a/st.c b/st.c
+index 76b7e0d..0e9a614 100644
+--- a/st.c
++++ b/st.c
+@@ -723,8 +723,14 @@ sigchld(int a)
+ 	if ((p = waitpid(pid, &stat, WNOHANG)) < 0)
+ 		die("waiting for pid %hd failed: %s\n", pid, strerror(errno));
+ 
+-	if (pid != p)
++	if (pid != p) {
++		if (p == 0 && wait(&stat) < 0)
++			die("wait: %s\n", strerror(errno));
++
++		/* reinstall sigchld handler */
++		signal(SIGCHLD, sigchld);
+ 		return;
++	}
+ 
+ 	if (WIFEXITED(stat) && WEXITSTATUS(stat))
+ 		die("child exited with status %d\n", WEXITSTATUS(stat));
+@@ -1926,6 +1932,59 @@ strparse(void)
+ 	}
+ }
+ 
++void
++externalpipe(const Arg *arg)
++{
++	int to[2];
++	char buf[UTF_SIZ];
++	void (*oldsigpipe)(int);
++	Glyph *bp, *end;
++	int lastpos, n, newline;
++
++	if (pipe(to) == -1)
++		return;
++
++	switch (fork()) {
++	case -1:
++		close(to[0]);
++		close(to[1]);
++		return;
++	case 0:
++		dup2(to[0], STDIN_FILENO);
++		close(to[0]);
++		close(to[1]);
++		execvp(((char **)arg->v)[0], (char **)arg->v);
++		fprintf(stderr, "st: execvp %s\n", ((char **)arg->v)[0]);
++		perror("failed");
++		exit(0);
++	}
++
++	close(to[0]);
++	/* ignore sigpipe for now, in case child exists early */
++	oldsigpipe = signal(SIGPIPE, SIG_IGN);
++	newline = 0;
++	for (n = 0; n < term.row; n++) {
++		bp = term.line[n];
++		lastpos = MIN(tlinelen(n) + 1, term.col) - 1;
++		if (lastpos < 0)
++			break;
++		end = &bp[lastpos + 1];
++		for (; bp < end; ++bp)
++			if (xwrite(to[1], buf, utf8encode(bp->u, buf)) < 0)
++				break;
++		if ((newline = term.line[n][lastpos].mode & ATTR_WRAP))
++			continue;
++		if (xwrite(to[1], "\n", 1) < 0)
++			break;
++		newline = 0;
++	}
++	if (newline)
++		(void)xwrite(to[1], "\n", 1);
++	close(to[1]);
++	/* restore */
++	signal(SIGPIPE, oldsigpipe);
++}
++
+ void
+ strdump(void)
+ {
+diff --git a/st.h b/st.h
+index 3d351b6..392b64e 100644
+--- a/st.h
++++ b/st.h
+@@ -81,6 +81,7 @@ void die(const char *, ...);
+ void redraw(void);
+ void draw(void);
+ 
++void externalpipe(const Arg *);
+ void printscreen(const Arg *);
+ void printsel(const Arg *);
+ void sendbreak(const Arg *);