Added ligature-alpha-scrollback (w/o alpha) v0.9 patch

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
 

config.def.h

@@ -8,20 +8,6 @@
 static char *font = "Liberation Mono:pixelsize=12:antialias=true:autohint=true";
 static int borderpx = 2;
 
-/*
- * Override/adjust fontsize of choosen monitors:
- */
-MonitorConfig monitors_config[] = {
-	// skip = fixed relative points size (monitor dpi)
-	//   =0 : fixed absolute pixel size (default screen dpi)
-	//   >0 : auto absolute pixel size (monitor dpi)
-	//   <0 : auto relative points size (monitor dpi)
-	// {"DP-1", 0}, // BUG:(size=0): not restored to default after back'n'forth
-	{"HDMI-0~1", -20},  // BUG:(ignored DPI=220): = 20 is eqv to 10pt (DPI=110)
-	{"HDMI-0~2", -14},
-};
-float winmovethreshold = 0.6;
-
 /*
  * What program is execed by st depends of these precedence rules:
  * 1: program passed with -e
@@ -210,12 +196,13 @@ static Shortcut shortcuts[] = {
 	{ TERMMOD,              XK_Prior,       zoom,           {.f = +1} },
 	{ TERMMOD,              XK_Next,        zoom,           {.f = -1} },
 	{ TERMMOD,              XK_Home,        zoomreset,      {.f =  0} },
-	{ TERMMOD,              XK_End,         refreshxrandr,  {.i =  0} },
 	{ TERMMOD,              XK_C,           clipcopy,       {.i =  0} },
 	{ TERMMOD,              XK_V,           clippaste,      {.i =  0} },
 	{ 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} },
 };
 
 /*

config.mk

@@ -15,12 +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) --cflags harfbuzz`
-LIBS += -lXrandr
 
 # 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 *);

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)
@@ -22,17 +23,19 @@
 
 enum glyph_attribute {
 	ATTR_NULL       = 0,
-	ATTR_BOLD       = 1 << 0,
+	ATTR_SET        = 1 << 0,
-	ATTR_FAINT      = 1 << 1,
+	ATTR_BOLD       = 1 << 1,
-	ATTR_ITALIC     = 1 << 2,
+	ATTR_FAINT      = 1 << 2,
-	ATTR_UNDERLINE  = 1 << 3,
+	ATTR_ITALIC     = 1 << 3,
-	ATTR_BLINK      = 1 << 4,
+	ATTR_UNDERLINE  = 1 << 4,
-	ATTR_REVERSE    = 1 << 5,
+	ATTR_BLINK      = 1 << 5,
-	ATTR_INVISIBLE  = 1 << 6,
+	ATTR_REVERSE    = 1 << 6,
-	ATTR_STRUCK     = 1 << 7,
+	ATTR_INVISIBLE  = 1 << 7,
-	ATTR_WRAP       = 1 << 8,
+	ATTR_STRUCK     = 1 << 8,
-	ATTR_WIDE       = 1 << 9,
+	ATTR_WRAP       = 1 << 9,
-	ATTR_WDUMMY     = 1 << 10,
+	ATTR_WIDE       = 1 << 10,
+	ATTR_WDUMMY     = 1 << 11,
+	ATTR_SELECTED   = 1 << 12,
 	ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
 };
 
@@ -81,6 +84,8 @@ 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 *);
@@ -88,6 +93,7 @@ void toggleprinter(const Arg *);
 
 int tattrset(int);
 void tnew(int, int);
+int tisaltscreen(void);
 void tresize(int, int);
 void tsetdirtattr(int);
 void ttyhangup(void);

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);

x.c

@@ -14,12 +14,12 @@
 #include <X11/keysym.h>
 #include <X11/Xft/Xft.h>
 #include <X11/XKBlib.h>
-#include <X11/extensions/Xrandr.h>
 
 char *argv0;
 #include "arg.h"
 #include "st.h"
 #include "win.h"
+#include "hb.h"
 
 /* types used in config.h */
 typedef struct {
@@ -46,19 +46,6 @@ typedef struct {
 	signed char appcursor; /* application cursor */
 } Key;
 
-typedef struct {
-	const char *name;
-	float defaultfontsize;
-} MonitorConfig;
-
-typedef struct {
-	Atom name;
-	int x, y, w, h;
-	float defaultfontsize, usedfontsize;
-} MonitorInfo;
-
-static void refreshxrandr(const Arg *dummy);
-
 /* X modifiers */
 #define XK_ANY_MOD    UINT_MAX
 #define XK_NO_MOD     0
@@ -155,6 +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);
@@ -229,11 +217,6 @@ static void (*handler[LASTEvent])(XEvent *) = {
 	[SelectionRequest] = selrequest,
 };
 
-static double defaultrelfontsize = 0;
-static MonitorInfo *monitors_info = NULL;
-static int monitors_num = 0;
-static int prev_mindex = -1;
-
 /* Globals */
 static DC dc;
 static XWindow xw;
@@ -776,7 +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
@@ -1081,6 +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);
@@ -1204,7 +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);
@@ -1258,6 +1244,22 @@ xinit(int cols, int rows)
 		xsel.xtarget = XA_STRING;
 }
 
+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)
 {
@@ -1272,119 +1274,148 @@ 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 (
-		if (prevmode != mode) {
+			prevmode != mode
-			prevmode = mode;
+			|| ATTRCMP(glyphs[start], glyphs[i])
-			font = &dc.font;
+			|| selected(x + i, y) != selected(x + start, y)
-			frcflags = FRC_NORMAL;
+			|| i == (len - 1)
-			runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
+		) {
-			if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
+			/* Handle 1-character wide segments and end of line */
-				font = &dc.ibfont;
+			length = i - start;
-				frcflags = FRC_ITALICBOLD;
+			if (i == start) {
-			} else if (mode & ATTR_ITALIC) {
+				length = 1;
-				font = &dc.ifont;
+			} else if (i == (len - 1)) {
-				frcflags = FRC_ITALIC;
+				length = (i - start + 1);
-			} else if (mode & ATTR_BOLD) {
-				font = &dc.bfont;
-				frcflags = FRC_BOLD;
-			}
-			yp = winy + font->ascent;
-		}
-
-		/* 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;
-			}
-		}
-
-		/* 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,
+			/* Shape the segment. */
-					fontpattern);
+			hbtransform(&shaped, font->match, glyphs, start, length);
-			if (!frc[frclen].font)
+			runewidth = win.cw * ((glyphs[start].mode & ATTR_WIDE) ? 2.0f : 1.0f);
-				die("XftFontOpenPattern failed seeking fallback font: %s\n",
+			cluster_xp = xp; cluster_yp = yp;
-					strerror(errno));
+			for (int code_idx = 0; code_idx < shaped.count; code_idx++) {
-			frc[frclen].flags = frcflags;
+				int idx = shaped.glyphs[code_idx].cluster;
-			frc[frclen].unicodep = rune;
 
-			glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
+				if (glyphs[start + idx].mode & ATTR_WDUMMY)
+					continue;
 
-			f = frclen;
+				/* Advance the drawing cursor if we've moved to a new cluster */
-			frclen++;
+				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);
+				}
 
-			FcPatternDestroy(fcpattern);
+				if (shaped.glyphs[code_idx].codepoint != 0) {
-			FcCharSetDestroy(fccharset);
+					/* 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++;
+				}
+			}
+
+			/* Cleanup and get ready for next segment. */
+			hbcleanup(&shaped);
+			start = i;
+
+			/* Determine font for glyph if different from previous glyph. */
+			if (prevmode != mode) {
+				prevmode = mode;
+				xresetfontsettings(mode, &font, &frcflags);
+				yp = winy + font->ascent;
+			}
 		}
-
-		specs[numspecs].font = frc[f].font;
-		specs[numspecs].glyph = glyphidx;
-		specs[numspecs].x = (short)xp;
-		specs[numspecs].y = (short)yp;
-		xp += runewidth;
-		numspecs++;
 	}
 
 	return numspecs;
@@ -1536,14 +1567,17 @@ 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;
@@ -1671,18 +1705,16 @@ 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)) {
+		if ((i > 0) && ATTRCMP(base, new)) {
-			xdrawglyphfontspecs(specs, base, i, ox, y1);
+			numspecs = xmakeglyphfontspecs(specs, &line[ox], x - ox, ox, y1);
-			specs += i;
+			xdrawglyphfontspecs(specs, base, numspecs, ox, y1);
-			numspecs -= i;
 			i = 0;
 		}
 		if (i == 0) {
@@ -1691,8 +1723,10 @@ xdrawline(Line line, int x1, int y1, int x2)
 		}
 		i++;
 	}
-	if (i > 0)
+	if (i > 0) {
-		xdrawglyphfontspecs(specs, base, i, ox, y1);
+		numspecs = xmakeglyphfontspecs(specs, &line[ox], x2 - ox, ox, y1);
+		xdrawglyphfontspecs(specs, base, numspecs, ox, y1);
+	}
 }
 
 void
@@ -1772,144 +1806,6 @@ xseturgency(int add)
 	XFree(h);
 }
 
-static void
-cachemonitorinfo()
-{
-	int prev_num = monitors_num;
-	MonitorInfo *prev_info = monitors_info;
-	XRRMonitorInfo *xmonitors = XRRGetMonitors(xw.dpy, XRootWindow(xw.dpy, xw.scr), 1, &monitors_num);
-	if (!monitors_num)
-		die("xrandr found no monitors");
-
-	monitors_info = xmalloc(monitors_num * sizeof(MonitorInfo));
-
-	for (int i = 0; i < monitors_num; ++i) {
-		XRRMonitorInfo *xm = &xmonitors[i];
-		MonitorInfo *m = &monitors_info[i];
-
-		m->name = xm->name;
-		m->x = xm->x;
-		m->y = xm->y;
-		m->w = xm->width;
-		m->h = xm->height;
-
-		float px_mm = ((float)m->w / xm->mwidth + (float)m->h / xm->mheight) / 2;
-		float px_pt = 25.4 * px_mm / 72;
-		m->defaultfontsize = defaultrelfontsize * px_pt;
-
-		// Override defaultfontsize (dpi) by user config
-		char *name = XGetAtomName(xw.dpy, xm->name);
-		for (int j = 0; j < LEN(monitors_config); ++j)
-			if (!strcmp(name, monitors_config[j].name)) {
-				m->defaultfontsize = monitors_config[j].defaultfontsize;
-				if (m->defaultfontsize < 0)
-					m->defaultfontsize *= -px_pt;
-				break;
-			}
-		// fprintf(stderr, "%s: %fpx, %f\n", name, m->defaultfontsize, m->usedfontsize);
-		XFree(name);
-
-		// Restore usedfontsize (zoom) after re-cache for monitors with the same name
-		m->usedfontsize = m->defaultfontsize;
-		for (int j = 0; j < prev_num; ++j)
-			if (prev_info[j].name == m->name) {
-				m->usedfontsize = prev_info[j].usedfontsize;
-				break;
-			}
-	}
-
-	XRRFreeMonitors(xmonitors);
-	free(prev_info);
-}
-
-static int
-getmonitorindex_threshold(int w, int h, int x, int y)
-{
-	int mindex = -1;
-	float fontsize = 0;
-	int thresholdarea = winmovethreshold * w * h;
-
-	for (int i = 0; i < monitors_num; ++i) {
-		MonitorInfo *m = &monitors_info[i];
-		int overlap_w = MAX(0, MIN(x + w, m->x + m->w) - MAX(x, m->x));
-		int overlap_h = MAX(0, MIN(y + h, m->y + m->h) - MAX(y, m->y));
-		int area = overlap_w * overlap_h;
-		// Choose monitor with largest dpi (defaultfontsize)
-		//  from all "mirrored"/overlapped (e.g. projector)
-		if (area >= thresholdarea && fontsize < m->defaultfontsize) {
-			fontsize = m->defaultfontsize;
-			mindex = i;
-		}
-	}
-	return mindex;
-}
-
-static int
-getmonitorindex_nearest(int w, int h, int x, int y)
-{
-	int mindex = -1;
-	float fontsize = 0;
-	int overlaparea = 0;
-
-	for (int i = 0; i < monitors_num; ++i) {
-		MonitorInfo *m = &monitors_info[i];
-		int overlap_w = MAX(0, MIN(x + w, m->x + m->w) - MAX(x, m->x));
-		int overlap_h = MAX(0, MIN(y + h, m->y + m->h) - MAX(y, m->y));
-		int area = overlap_w * overlap_h;
-		// Choose monitor with largest overlapping area
-		//  e.g. when "st" is initially spawned in-between monitors
-		if (area > overlaparea) {
-			overlaparea = area;
-			mindex = i;
-		}
-	}
-	return mindex;
-}
-
-static void
-adjustmonitorfontsize(int mindex)
-{
-	if (mindex < 0 || prev_mindex == mindex)
-		return;
-	// Save zoom of current monitor before switching
-	if (prev_mindex >= 0)
-		monitors_info[prev_mindex].usedfontsize = usedfontsize;
-
-	defaultfontsize = monitors_info[mindex].defaultfontsize;
-	// fprintf(stderr, "Crossing: %fpx\n", defaultfontsize);
-
-	// NOTE: do nothing if font size differs by less than 1%
-	double fontsize = monitors_info[mindex].usedfontsize;
-	double delta = 0.01 * usedfontsize;
-	if (!BETWEEN(fontsize - usedfontsize, -delta, delta)) {
-		// fprintf(stderr, "Adjusted: %fpx\n", fontsize);
-		xunloadfonts();
-		xloadfonts(usedfont, fontsize);
-	}
-	prev_mindex = mindex;
-}
-
-void
-refreshxrandr(const Arg *dummy)
-{
-	// Reset index to detect change of window association on "xrandr ... --primary"
-	//  otherwise: zoom won't be saved on switching and new font size won't be loaded
-	// CRIT!!! event from xrandr may place another monitor into same index
-	if (prev_mindex >= 0)
-		monitors_info[prev_mindex].usedfontsize = usedfontsize;
-	prev_mindex = -1;
-
-	XWindowAttributes xattr = {0};
-	cachemonitorinfo();
-	XGetWindowAttributes(xw.dpy, xw.win, &xattr);
-
-	int mindex = getmonitorindex_threshold(xattr.width, xattr.height, xattr.x, xattr.y);
-	if (mindex < 0)
-		mindex = getmonitorindex_nearest(xattr.width, xattr.height, xattr.x, xattr.y);
-	adjustmonitorfontsize(mindex);
-}
-
-
 void
 xbell(void)
 {
@@ -2062,14 +1958,6 @@ cmessage(XEvent *e)
 void
 resize(XEvent *e)
 {
-	// BAD: no resize on monitor plug/unplug/reconfigure -- until window itself is kept in the same place
-	// NOTE: no resize event on zoomabs()
-	// fprintf(stderr, "Resize: %dx%d+%d+%d\n",
-	//     e->xconfigure.width, e->xconfigure.height, e->xconfigure.x, e->xconfigure.y);
-
-	adjustmonitorfontsize(getmonitorindex_threshold(
-	    e->xconfigure.width, e->xconfigure.height, e->xconfigure.x, e->xconfigure.y));
-
 	if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
 		return;
 
@@ -2102,22 +1990,6 @@ run(void)
 		}
 	} while (ev.type != MapNotify);
 
-	int rr_event_base, rr_error_base, rr_major, rr_minor;
-	if (!XRRQueryExtension (xw.dpy, &rr_event_base, &rr_error_base) ||
-	    !XRRQueryVersion (xw.dpy, &rr_major, &rr_minor) ||
-	    rr_major < 1 || (rr_major == 1 && rr_minor < 5))
-	{
-		die("RandR 1.5 extension isn't available\n");
-	}
-	XRRSelectInput(xw.dpy, xw.win, RRCrtcChangeNotifyMask);
-
-	// WARN: can query actual window size/pos only after window is mapped and its width/height are adjusted by WM
-	//  * x/y are WM-dependent and can't be determined beforehand anyway
-	//  * defaultfontsize isn't available until font is loaded and actual Fc*() size queried
-	// BAD: fonts on startup are always reloaded -- how to specify their size beforehand ?
-	FcPatternGetDouble(dc.font.match->pattern, FC_SIZE, 0, &defaultrelfontsize);
-	refreshxrandr(0);
-
 	ttyfd = ttynew(opt_line, shell, opt_io, opt_cmd);
 	cresize(w, h);
 
@@ -2149,16 +2021,6 @@ run(void)
 			XNextEvent(xw.dpy, &ev);
 			if (XFilterEvent(&ev, None))
 				continue;
-			if (LASTEvent <= ev.type) {
-				if (rr_event_base + RRNotify == ev.type &&
-					RRNotify_CrtcChange == ((XRRNotifyEvent *)&ev)->subtype)
-				{
-					XRRUpdateConfiguration(&ev);
-					// fprintf(stderr, "Monitor change: %d > %d\n", rr_event_base, LASTEvent);
-					refreshxrandr(0);
-				}
-				continue;
-			}
 			if (handler[ev.type])
 				(handler[ev.type])(&ev);
 		}