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	st-ligatures-20240105-0.9.diff (18709B)
	---
	1 diff --git a/Makefile b/Makefile
	2 index 470ac86..38240da 100644
	3 --- a/Makefile
	4 +++ b/Makefile
	5 @@ -4,7 +4,7 @@
	6
	7 include config.mk
	8
	9 -SRC = st.c x.c
	10 +SRC = st.c x.c hb.c
	11 OBJ = $(SRC:.c=.o)
	12
	13 all: options st
	14 @@ -22,7 +22,8 @@ config.h:
	15 $(CC) $(STCFLAGS) -c $<
	16
	17 st.o: config.h st.h win.h
	18 -x.o: arg.h config.h st.h win.h
	19 +x.o: arg.h config.h st.h win.h hb.h
	20 +hb.o: st.h
	21
	22 $(OBJ): config.h config.mk
	23
	24 diff --git a/config.mk b/config.mk
	25 index 1e306f8..3e13e53 100644
	26 --- a/config.mk
	27 +++ b/config.mk
	28 @@ -15,10 +15,12 @@ PKG_CONFIG = pkg-config
	29 # includes and libs
	30 INCS = -I$(X11INC) \
	31 `$(PKG_CONFIG) --cflags fontconfig` \
	32 - `$(PKG_CONFIG) --cflags freetype2`
	33 + `$(PKG_CONFIG) --cflags freetype2` \
	34 + `$(PKG_CONFIG) --cflags harfbuzz`
	35 LIBS = -L$(X11LIB) -lm -lrt -lX11 -lutil -lXft \
	36 `$(PKG_CONFIG) --libs fontconfig` \
	37 - `$(PKG_CONFIG) --libs freetype2`
	38 + `$(PKG_CONFIG) --libs freetype2` \
	39 + `$(PKG_CONFIG) --libs harfbuzz`
	40
	41 # flags
	42 STCPPFLAGS = -DVERSION=\"$(VERSION)\" -D_XOPEN_SOURCE=600
	43 diff --git a/hb.c b/hb.c
	44 new file mode 100644
	45 index 0000000..99412c8
	46 --- /dev/null
	47 +++ b/hb.c
	48 @@ -0,0 +1,125 @@
	49 +#include <stdlib.h>
	50 +#include <stdio.h>
	51 +#include <math.h>
	52 +#include <X11/Xft/Xft.h>
	53 +#include <X11/cursorfont.h>
	54 +#include <hb.h>
	55 +#include <hb-ft.h>
	56 +
	57 +#include "st.h"
	58 +#include "hb.h"
	59 +
	60 +#define FEATURE(c1,c2,c3,c4) { .tag = HB_TAG(c1,c2,c3,c4), .value = 1, …
	61 +#define BUFFER_STEP 256
	62 +
	63 +hb_font_t hbfindfont(XftFont match);
	64 +
	65 +typedef struct {
	66 + XftFont *match;
	67 + hb_font_t *font;
	68 +} HbFontMatch;
	69 +
	70 +typedef struct {
	71 + size_t capacity;
	72 + HbFontMatch *fonts;
	73 +} HbFontCache;
	74 +
	75 +static HbFontCache hbfontcache = { 0, NULL };
	76 +
	77 +typedef struct {
	78 + size_t capacity;
	79 + Rune *runes;
	80 +} RuneBuffer;
	81 +
	82 +static RuneBuffer hbrunebuffer = { 0, NULL };
	83 +
	84 +/*
	85 + * Poplulate the array with a list of font features, wrapped in FEATURE…
	86 + * e. g.
	87 + * FEATURE('c', 'a', 'l', 't'), FEATURE('d', 'l', 'i', 'g')
	88 + */
	89 +hb_feature_t features[] = { };
	90 +
	91 +void
	92 +hbunloadfonts()
	93 +{
	94 + for (int i = 0; i < hbfontcache.capacity; i++) {
	95 + hb_font_destroy(hbfontcache.fonts[i].font);
	96 + XftUnlockFace(hbfontcache.fonts[i].match);
	97 + }
	98 +
	99 + if (hbfontcache.fonts != NULL) {
	100 + free(hbfontcache.fonts);
	101 + hbfontcache.fonts = NULL;
	102 + }
	103 + hbfontcache.capacity = 0;
	104 +}
	105 +
	106 +hb_font_t *
	107 +hbfindfont(XftFont *match)
	108 +{
	109 + for (int i = 0; i < hbfontcache.capacity; i++) {
	110 + if (hbfontcache.fonts[i].match == match)
	111 + return hbfontcache.fonts[i].font;
	112 + }
	113 +
	114 + /* Font not found in cache, caching it now. */
	115 + hbfontcache.fonts = realloc(hbfontcache.fonts, sizeof(HbFontMat…
	116 + FT_Face face = XftLockFace(match);
	117 + hb_font_t *font = hb_ft_font_create(face, NULL);
	118 + if (font == NULL)
	119 + die("Failed to load Harfbuzz font.");
	120 +
	121 + hbfontcache.fonts[hbfontcache.capacity].match = match;
	122 + hbfontcache.fonts[hbfontcache.capacity].font = font;
	123 + hbfontcache.capacity += 1;
	124 +
	125 + return font;
	126 +}
	127 +
	128 +void hbtransform(HbTransformData data, XftFont xfont, const Glyph *gl…
	129 + ushort mode = USHRT_MAX;
	130 + unsigned int glyph_count;
	131 + int rune_idx, glyph_idx, end = start + length;
	132 +
	133 + hb_font_t *font = hbfindfont(xfont);
	134 + if (font == NULL)
	135 + return;
	136 +
	137 + hb_buffer_t *buffer = hb_buffer_create();
	138 + hb_buffer_set_direction(buffer, HB_DIRECTION_LTR);
	139 + hb_buffer_set_cluster_level(buffer, HB_BUFFER_CLUSTER_LEVEL_MON…
	140 +
	141 + /* Resize the buffer if required length is larger. */
	142 + if (hbrunebuffer.capacity < length) {
	143 + hbrunebuffer.capacity = (length / BUFFER_STEP + 1) * BU…
	144 + hbrunebuffer.runes = realloc(hbrunebuffer.runes, hbrune…
	145 + }
	146 +
	147 + /* Fill buffer with codepoints. */
	148 + for (rune_idx = 0, glyph_idx = start; glyph_idx < end; glyph_id…
	149 + hbrunebuffer.runes[rune_idx] = glyphs[glyph_idx].u;
	150 + mode = glyphs[glyph_idx].mode;
	151 + if (mode & ATTR_WDUMMY)
	152 + hbrunebuffer.runes[rune_idx] = 0x0020;
	153 + }
	154 + hb_buffer_add_codepoints(buffer, hbrunebuffer.runes, length, 0,…
	155 +
	156 + /* Shape the segment. */
	157 + hb_shape(font, buffer, features, sizeof(features)/sizeof(hb_fea…
	158 +
	159 + /* Get new glyph info. */
	160 + hb_glyph_info_t *info = hb_buffer_get_glyph_infos(buffer, &glyp…
	161 + hb_glyph_position_t *pos = hb_buffer_get_glyph_positions(buffer…
	162 +
	163 + /* Fill the output. */
	164 + data->buffer = buffer;
	165 + data->glyphs = info;
	166 + data->positions = pos;
	167 + data->count = glyph_count;
	168 +}
	169 +
	170 +void hbcleanup(HbTransformData *data) {
	171 + hb_buffer_destroy(data->buffer);
	172 + memset(data, 0, sizeof(HbTransformData));
	173 +}
	174 diff --git a/hb.h b/hb.h
	175 new file mode 100644
	176 index 0000000..3b0ef44
	177 --- /dev/null
	178 +++ b/hb.h
	179 @@ -0,0 +1,14 @@
	180 +#include <X11/Xft/Xft.h>
	181 +#include <hb.h>
	182 +#include <hb-ft.h>
	183 +
	184 +typedef struct {
	185 + hb_buffer_t *buffer;
	186 + hb_glyph_info_t *glyphs;
	187 + hb_glyph_position_t *positions;
	188 + unsigned int count;
	189 +} HbTransformData;
	190 +
	191 +void hbunloadfonts();
	192 +void hbtransform(HbTransformData , XftFont , const Glyph *, int, int);
	193 +void hbcleanup(HbTransformData *);
	194 diff --git a/st.c b/st.c
	195 index 62def59..041c6d8 100644
	196 --- a/st.c
	197 +++ b/st.c
	198 @@ -2640,7 +2640,8 @@ draw(void)
	199
	200 drawregion(0, 0, term.col, term.row);
	201 xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
	202 - term.ocx, term.ocy, term.line[term.ocy][term.oc…
	203 + term.ocx, term.ocy, term.line[term.ocy][term.oc…
	204 + term.line[term.ocy], term.col);
	205 term.ocx = cx;
	206 term.ocy = term.c.y;
	207 xfinishdraw();
	208 diff --git a/st.h b/st.h
	209 index fd3b0d8..142fdfe 100644
	210 --- a/st.h
	211 +++ b/st.h
	212 @@ -11,7 +11,8 @@
	213 #define DIVCEIL(n, d) (((n) + ((d) - 1)) / (d))
	214 #define DEFAULT(a, b) (a) = (a) ? (a) : (b)
	215 #define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b)…
	216 -#define ATTRCMP(a, b) ((a).mode != (b).mode \|\| (a).fg !=…
	217 +#define ATTRCMP(a, b) (((a).mode & (~ATTR_WRAP)) != ((b)…
	218 + (a).fg != (b).fg \|\| \
	219 (a).bg != (b).bg)
	220 #define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + \
	221 (t1.tv_nsec-t2.tv_nsec)/1E6)
	222 diff --git a/win.h b/win.h
	223 index 6de960d..94679e4 100644
	224 --- a/win.h
	225 +++ b/win.h
	226 @@ -25,7 +25,7 @@ enum win_mode {
	227
	228 void xbell(void);
	229 void xclipcopy(void);
	230 -void xdrawcursor(int, int, Glyph, int, int, Glyph);
	231 +void xdrawcursor(int, int, Glyph, int, int, Glyph, Line, int);
	232 void xdrawline(Line, int, int, int);
	233 void xfinishdraw(void);
	234 void xloadcols(void);
	235 diff --git a/x.c b/x.c
	236 index 2a3bd38..66605ae 100644
	237 --- a/x.c
	238 +++ b/x.c
	239 @@ -19,6 +19,7 @@ char *argv0;
	240 #include "arg.h"
	241 #include "st.h"
	242 #include "win.h"
	243 +#include "hb.h"
	244
	245 /* types used in config.h */
	246 typedef struct {
	247 @@ -141,8 +142,9 @@ typedef struct {
	248 } DC;
	249
	250 static inline ushort sixd_to_16bit(int);
	251 +static void xresetfontsettings(ushort mode, Font *font, int frcflags);
	252 static int xmakeglyphfontspecs(XftGlyphFontSpec , const Glyph , int, …
	253 -static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, i…
	254 +static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, i…
	255 static void xdrawglyph(Glyph, int, int);
	256 static void xclear(int, int, int, int);
	257 static int xgeommasktogravity(int);
	258 @@ -757,7 +759,7 @@ xresize(int col, int row)
	259 xclear(0, 0, win.w, win.h);
	260
	261 /* resize to new width */
	262 - xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec));
	263 + xw.specbuf = xrealloc(xw.specbuf, col * sizeof(GlyphFontSpec) *…
	264 }
	265
	266 ushort
	267 @@ -1062,6 +1064,9 @@ xunloadfont(Font *f)
	268 void
	269 xunloadfonts(void)
	270 {
	271 + /* Clear Harfbuzz font cache. */
	272 + hbunloadfonts();
	273 +
	274 /* Free the loaded fonts in the font cache. */
	275 while (frclen > 0)
	276 XftFontClose(xw.dpy, frc[--frclen].font);
	277 @@ -1185,7 +1190,7 @@ xinit(int cols, int rows)
	278 XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
	279
	280 /* font spec buffer */
	281 - xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec));
	282 + xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec) * 4);
	283
	284 /* Xft rendering context */
	285 xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
	286 @@ -1239,6 +1244,22 @@ xinit(int cols, int rows)
	287 xsel.xtarget = XA_STRING;
	288 }
	289
	290 +void
	291 +xresetfontsettings(ushort mode, Font *font, int frcflags)
	292 +{
	293 + *font = &dc.font;
	294 + if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
	295 + *font = &dc.ibfont;
	296 + *frcflags = FRC_ITALICBOLD;
	297 + } else if (mode & ATTR_ITALIC) {
	298 + *font = &dc.ifont;
	299 + *frcflags = FRC_ITALIC;
	300 + } else if (mode & ATTR_BOLD) {
	301 + *font = &dc.bfont;
	302 + *frcflags = FRC_BOLD;
	303 + }
	304 +}
	305 +
	306 int
	307 xmakeglyphfontspecs(XftGlyphFontSpec specs, const Glyph glyphs, int l…
	308 {
	309 @@ -1253,128 +1274,156 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, c…
	310 FcPattern fcpattern, fontpattern;
	311 FcFontSet *fcsets[] = { NULL };
	312 FcCharSet *fccharset;
	313 - int i, f, numspecs = 0;
	314 + int i, f, length = 0, start = 0, numspecs = 0;
	315 + float cluster_xp = xp, cluster_yp = yp;
	316 + HbTransformData shaped = { 0 };
	317 +
	318 + /* Initial values. */
	319 + mode = prevmode = glyphs[0].mode & ~ATTR_WRAP;
	320 + xresetfontsettings(mode, &font, &frcflags);
	321
	322 for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
	323 - /* Fetch rune and mode for current glyph. */
	324 - rune = glyphs[i].u;
	325 - mode = glyphs[i].mode;
	326 + mode = glyphs[i].mode & ~ATTR_WRAP;
	327
	328 /* Skip dummy wide-character spacing. */
	329 - if (mode == ATTR_WDUMMY)
	330 + if (mode & ATTR_WDUMMY && i < (len - 1))
	331 continue;
	332
	333 - /* Determine font for glyph if different from previous …
	334 - if (prevmode != mode) {
	335 - prevmode = mode;
	336 - font = &dc.font;
	337 - frcflags = FRC_NORMAL;
	338 - runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f…
	339 - if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD))…
	340 - font = &dc.ibfont;
	341 - frcflags = FRC_ITALICBOLD;
	342 - } else if (mode & ATTR_ITALIC) {
	343 - font = &dc.ifont;
	344 - frcflags = FRC_ITALIC;
	345 - } else if (mode & ATTR_BOLD) {
	346 - font = &dc.bfont;
	347 - frcflags = FRC_BOLD;
	348 + if (
	349 + prevmode != mode
	350 + \|\| ATTRCMP(glyphs[start], glyphs[i])
	351 + \|\| selected(x + i, y) != selected(x + start, y)
	352 + \|\| i == (len - 1)
	353 + ) {
	354 + /* Handle 1-character wide segments and end of …
	355 + length = i - start;
	356 + if (i == start) {
	357 + length = 1;
	358 + } else if (i == (len - 1)) {
	359 + length = (i - start + 1);
	360 }
	361 - yp = winy + font->ascent;
	362 - }
	363
	364 - /* Lookup character index with default font. */
	365 - glyphidx = XftCharIndex(xw.dpy, font->match, rune);
	366 - if (glyphidx) {
	367 - specs[numspecs].font = font->match;
	368 - specs[numspecs].glyph = glyphidx;
	369 - specs[numspecs].x = (short)xp;
	370 - specs[numspecs].y = (short)yp;
	371 - xp += runewidth;
	372 - numspecs++;
	373 - continue;
	374 - }
	375 -
	376 - /* Fallback on font cache, search the font cache for ma…
	377 - for (f = 0; f < frclen; f++) {
	378 - glyphidx = XftCharIndex(xw.dpy, frc[f].font, ru…
	379 - /* Everything correct. */
	380 - if (glyphidx && frc[f].flags == frcflags)
	381 - break;
	382 - /* We got a default font for a not found glyph.…
	383 - if (!glyphidx && frc[f].flags == frcflags
	384 - && frc[f].unicodep == rune) {
	385 - break;
	386 + /* Shape the segment. */
	387 + hbtransform(&shaped, font->match, glyphs, start…
	388 + runewidth = win.cw * ((glyphs[start].mode & ATT…
	389 + cluster_xp = xp; cluster_yp = yp;
	390 + for (int code_idx = 0; code_idx < shaped.count;…
	391 + int idx = shaped.glyphs[code_idx].clust…
	392 +
	393 + if (glyphs[start + idx].mode & ATTR_WDU…
	394 + continue;
	395 +
	396 + /* Advance the drawing cursor if we've …
	397 + if (code_idx > 0 && idx != shaped.glyph…
	398 + xp += runewidth;
	399 + cluster_xp = xp;
	400 + cluster_yp = yp;
	401 + runewidth = win.cw * ((glyphs[s…
	402 + }
	403 +
	404 + if (shaped.glyphs[code_idx].codepoint !…
	405 + /* If symbol is found, put it i…
	406 + specs[numspecs].font = font->ma…
	407 + specs[numspecs].glyph = shaped.…
	408 + specs[numspecs].x = cluster_xp …
	409 + specs[numspecs].y = cluster_yp …
	410 + cluster_xp += shaped.positions[…
	411 + cluster_yp += shaped.positions[…
	412 + numspecs++;
	413 + } else {
	414 + /* If it's not found, try to fe…
	415 + rune = glyphs[start + idx].u;
	416 + for (f = 0; f < frclen; f++) {
	417 + glyphidx = XftCharIndex…
	418 + /* Everything correct. …
	419 + if (glyphidx && frc[f].…
	420 + break;
	421 + /* We got a default fon…
	422 + if (!glyphidx && frc[f]…
	423 + && frc[…
	424 + break;
	425 + }
	426 + }
	427 +
	428 + /* Nothing was found. Use fontc…
	429 + if (f >= frclen) {
	430 + if (!font->set)
	431 + font->set = FcF…
	432 + …
	433 + fcsets[0] = font->set;
	434 +
	435 + /*
	436 + * Nothing was found in…
	437 + * some dozen of Fontco…
	438 + * font for one single …
	439 + *
	440 + * Xft and fontconfig a…
	441 + */
	442 + fcpattern = FcPatternDu…
	443 + fccharset = FcCharSetCr…
	444 +
	445 + FcCharSetAddChar(fcchar…
	446 + FcPatternAddCharSet(fcp…
	447 + fcchars…
	448 + FcPatternAddBool(fcpatt…
	449 +
	450 + FcConfigSubstitute(0, f…
	451 + FcMatch…
	452 + FcDefaultSubstitute(fcp…
	453 +
	454 + fontpattern = FcFontSet…
	455 + fcpatte…
	456 +
	457 + /* Allocate memory for …
	458 + if (frclen >= frccap) {
	459 + frccap += 16;
	460 + frc = xrealloc(…
	461 + }
	462 +
	463 + frc[frclen].font = XftF…
	464 + fontpat…
	465 + if (!frc[frclen].font)
	466 + die("XftFontOpe…
	467 + strerro…
	468 + frc[frclen].flags = frc…
	469 + frc[frclen].unicodep = …
	470 +
	471 + glyphidx = XftCharIndex…
	472 +
	473 + f = frclen;
	474 + frclen++;
	475 +
	476 + FcPatternDestroy(fcpatt…
	477 + FcCharSetDestroy(fcchar…
	478 + }
	479 +
	480 + specs[numspecs].font = frc[f].f…
	481 + specs[numspecs].glyph = glyphid…
	482 + specs[numspecs].x = (short)xp;
	483 + specs[numspecs].y = (short)yp;
	484 + numspecs++;
	485 + }
	486 }
	487 - }
	488
	489 - /* Nothing was found. Use fontconfig to find matching f…
	490 - if (f >= frclen) {
	491 - if (!font->set)
	492 - font->set = FcFontSort(0, font->pattern,
	493 - 1, 0, &fcres);
	494 - fcsets[0] = font->set;
	495 + /* Cleanup and get ready for next segment. */
	496 + hbcleanup(&shaped);
	497 + start = i;
	498
	499 - /*
	500 - * Nothing was found in the cache. Now use
	501 - * some dozen of Fontconfig calls to get the
	502 - * font for one single character.
	503 - *
	504 - * Xft and fontconfig are design failures.
	505 - */
	506 - fcpattern = FcPatternDuplicate(font->pattern);
	507 - fccharset = FcCharSetCreate();
	508 -
	509 - FcCharSetAddChar(fccharset, rune);
	510 - FcPatternAddCharSet(fcpattern, FC_CHARSET,
	511 - fccharset);
	512 - FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
	513 -
	514 - FcConfigSubstitute(0, fcpattern,
	515 - FcMatchPattern);
	516 - FcDefaultSubstitute(fcpattern);
	517 -
	518 - fontpattern = FcFontSetMatch(0, fcsets, 1,
	519 - fcpattern, &fcres);
	520 -
	521 - /* Allocate memory for the new cache entry. */
	522 - if (frclen >= frccap) {
	523 - frccap += 16;
	524 - frc = xrealloc(frc, frccap * sizeof(Fon…
	525 + /* Determine font for glyph if different from p…
	526 + if (prevmode != mode) {
	527 + prevmode = mode;
	528 + xresetfontsettings(mode, &font, &frcfla…
	529 + yp = winy + font->ascent;
	530 }
	531 -
	532 - frc[frclen].font = XftFontOpenPattern(xw.dpy,
	533 - fontpattern);
	534 - if (!frc[frclen].font)
	535 - die("XftFontOpenPattern failed seeking …
	536 - strerror(errno));
	537 - frc[frclen].flags = frcflags;
	538 - frc[frclen].unicodep = rune;
	539 -
	540 - glyphidx = XftCharIndex(xw.dpy, frc[frclen].fon…
	541 -
	542 - f = frclen;
	543 - frclen++;
	544 -
	545 - FcPatternDestroy(fcpattern);
	546 - FcCharSetDestroy(fccharset);
	547 }
	548 -
	549 - specs[numspecs].font = frc[f].font;
	550 - specs[numspecs].glyph = glyphidx;
	551 - specs[numspecs].x = (short)xp;
	552 - specs[numspecs].y = (short)yp;
	553 - xp += runewidth;
	554 - numspecs++;
	555 }
	556
	557 return numspecs;
	558 }
	559
	560 void
	561 -xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len,…
	562 +xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len,…
	563 {
	564 - int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
	565 int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
	566 width = charlen * win.cw;
	567 Color fg, bg, *temp, revfg, revbg, truefg, truebg;
	568 @@ -1510,21 +1559,24 @@ void
	569 xdrawglyph(Glyph g, int x, int y)
	570 {
	571 int numspecs;
	572 - XftGlyphFontSpec spec;
	573 + XftGlyphFontSpec *specs = xw.specbuf;
	574
	575 - numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
	576 - xdrawglyphfontspecs(&spec, g, numspecs, x, y);
	577 + numspecs = xmakeglyphfontspecs(specs, &g, 1, x, y);
	578 + xdrawglyphfontspecs(specs, g, numspecs, x, y, (g.mode & ATTR_WI…
	579 }
	580
	581 void
	582 -xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
	583 +xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og, Line lin…
	584 {
	585 Color drawcol;
	586
	587 /* remove the old cursor */
	588 if (selected(ox, oy))
	589 og.mode ^= ATTR_REVERSE;
	590 - xdrawglyph(og, ox, oy);
	591 +
	592 + /* Redraw the line where cursor was previously.
	593 + * It will restore the ligatures broken by the cursor. */
	594 + xdrawline(line, 0, oy, len);
	595
	596 if (IS_SET(MODE_HIDE))
	597 return;
	598 @@ -1652,18 +1704,16 @@ xdrawline(Line line, int x1, int y1, int x2)
	599 Glyph base, new;
	600 XftGlyphFontSpec *specs = xw.specbuf;
	601
	602 - numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y…
	603 i = ox = 0;
	604 - for (x = x1; x < x2 && i < numspecs; x++) {
	605 + for (x = x1; x < x2; x++) {
	606 new = line[x];
	607 if (new.mode == ATTR_WDUMMY)
	608 continue;
	609 if (selected(x, y1))
	610 new.mode ^= ATTR_REVERSE;
	611 - if (i > 0 && ATTRCMP(base, new)) {
	612 - xdrawglyphfontspecs(specs, base, i, ox, y1);
	613 - specs += i;
	614 - numspecs -= i;
	615 + if ((i > 0) && ATTRCMP(base, new)) {
	616 + numspecs = xmakeglyphfontspecs(specs, &line[ox]…
	617 + xdrawglyphfontspecs(specs, base, numspecs, ox, …
	618 i = 0;
	619 }
	620 if (i == 0) {
	621 @@ -1672,8 +1722,10 @@ xdrawline(Line line, int x1, int y1, int x2)
	622 }
	623 i++;
	624 }
	625 - if (i > 0)
	626 - xdrawglyphfontspecs(specs, base, i, ox, y1);
	627 + if (i > 0) {
	628 + numspecs = xmakeglyphfontspecs(specs, &line[ox], x2 - o…
	629 + xdrawglyphfontspecs(specs, base, numspecs, ox, y1, x2 -…
	630 + }
	631 }
	632
	633 void