Added appsync part2 v2020-06-18 patch

Reviewed-on: #8

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
@@ -70,6 +56,12 @@ int allowwindowops = 0;
 static double minlatency = 8;
 static double maxlatency = 33;
 
+/*
+ * Synchronized-Update timeout in ms
+ * https://gitlab.com/gnachman/iterm2/-/wikis/synchronized-updates-spec
+ */
+static uint su_timeout = 200;
+
 /*
  * blinking timeout (set to 0 to disable blinking) for the terminal blinking
  * attribute.
@@ -107,35 +99,30 @@ char *termname = "st-256color";
  */
 unsigned int tabspaces = 8;
 
+/* bg opacity */
+float alpha = 0.8;
+
 /* Terminal colors (16 first used in escape sequence) */
 static const char *colorname[] = {
 	/* 8 normal colors */
-	"black",
+	[0] = "#282828", /* hard contrast: #1d2021 / soft contrast: #32302f */
-	"red3",
+	[1] = "#cc241d", /* red     */
-	"green3",
+	[2] = "#98971a", /* green   */
-	"yellow3",
+	[3] = "#d79921", /* yellow  */
-	"blue2",
+	[4] = "#458588", /* blue    */
-	"magenta3",
+	[5] = "#b16286", /* magenta */
-	"cyan3",
+	[6] = "#689d6a", /* cyan    */
-	"gray90",
+	[7] = "#a89984", /* white   */
 
 	/* 8 bright colors */
-	"gray50",
+	[8]  = "#928374", /* black   */
-	"red",
+	[9]  = "#fb4934", /* red     */
-	"green",
+	[10] = "#b8bb26", /* green   */
-	"yellow",
+	[11] = "#fabd2f", /* yellow  */
-	"#5c5cff",
+	[12] = "#83a598", /* blue    */
-	"magenta",
+	[13] = "#d3869b", /* magenta */
-	"cyan",
+	[14] = "#8ec07c", /* cyan    */
-	"white",
+	[15] = "#ebdbb2", /* white   */
-
-	[255] = 0,
-
-	/* more colors can be added after 255 to use with DefaultXX */
-	"#cccccc",
-	"#555555",
-	"gray90", /* default foreground colour */
-	"black", /* default background colour */
 };
 
 
@@ -143,9 +130,9 @@ static const char *colorname[] = {
  * Default colors (colorname index)
  * foreground, background, cursor, reverse cursor
  */
-unsigned int defaultfg = 258;
+unsigned int defaultfg = 15;
-unsigned int defaultbg = 259;
+unsigned int defaultbg = 0;
-unsigned int defaultcs = 256;
+unsigned int defaultcs = 15;
 static unsigned int defaultrcs = 257;
 
 /*
@@ -210,7 +197,6 @@ 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} },

config.mk

@@ -16,12 +16,10 @@ PKG_CONFIG = pkg-config
 INCS = -I$(X11INC) \
        `$(PKG_CONFIG) --cflags fontconfig` \
        `$(PKG_CONFIG) --cflags freetype2`
-LIBS = -L$(X11LIB) -lm -lrt -lX11 -lutil -lXft \
+LIBS = -L$(X11LIB) -lm -lrt -lX11 -lutil -lXft -lXrender\
        `$(PKG_CONFIG) --libs fontconfig` \
        `$(PKG_CONFIG) --libs freetype2`
 
-LIBS += -lXrandr
-
 # flags
 STCPPFLAGS = -DVERSION=\"$(VERSION)\" -D_XOPEN_SOURCE=600
 STCFLAGS = $(INCS) $(STCPPFLAGS) $(CPPFLAGS) $(CFLAGS)

st.c

@@ -232,6 +232,33 @@ static const uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
 static const Rune utfmin[UTF_SIZ + 1] = {       0,    0,  0x80,  0x800,  0x10000};
 static const Rune utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
 
+#include <time.h>
+static int su = 0;
+struct timespec sutv;
+
+static void
+tsync_begin()
+{
+	clock_gettime(CLOCK_MONOTONIC, &sutv);
+	su = 1;
+}
+
+static void
+tsync_end()
+{
+	su = 0;
+}
+
+int
+tinsync(uint timeout)
+{
+	struct timespec now;
+	if (su && !clock_gettime(CLOCK_MONOTONIC, &now)
+	       && TIMEDIFF(now, sutv) >= timeout)
+		su = 0;
+	return su;
+}
+
 ssize_t
 xwrite(int fd, const char *s, size_t len)
 {
@@ -814,6 +841,9 @@ ttynew(const char *line, char *cmd, const char *out, char **args)
 	return cmdfd;
 }
 
+static int twrite_aborted = 0;
+int ttyread_pending() { return twrite_aborted; }
+
 size_t
 ttyread(void)
 {
@@ -822,7 +852,7 @@ ttyread(void)
 	int ret, written;
 
 	/* append read bytes to unprocessed bytes */
-	ret = read(cmdfd, buf+buflen, LEN(buf)-buflen);
+	ret = twrite_aborted ? 1 : read(cmdfd, buf+buflen, LEN(buf)-buflen);
 
 	switch (ret) {
 	case 0:
@@ -830,7 +860,7 @@ ttyread(void)
 	case -1:
 		die("couldn't read from shell: %s\n", strerror(errno));
 	default:
-		buflen += ret;
+		buflen += twrite_aborted ? 0 : ret;
 		written = twrite(buf, buflen, 0);
 		buflen -= written;
 		/* keep any incomplete UTF-8 byte sequence for the next call */
@@ -990,6 +1020,7 @@ tsetdirtattr(int attr)
 void
 tfulldirt(void)
 {
+	tsync_end();
 	tsetdirt(0, term.row-1);
 }
 
@@ -1959,6 +1990,12 @@ strhandle(void)
 		xsettitle(strescseq.args[0]);
 		return;
 	case 'P': /* DCS -- Device Control String */
+		/* https://gitlab.com/gnachman/iterm2/-/wikis/synchronized-updates-spec */
+		if (strstr(strescseq.buf, "=1s") == strescseq.buf)
+			tsync_begin();  /* BSU */
+		else if (strstr(strescseq.buf, "=2s") == strescseq.buf)
+			tsync_end();  /* ESU */
+		return;
 	case '_': /* APC -- Application Program Command */
 	case '^': /* PM -- Privacy Message */
 		return;
@@ -2507,6 +2544,9 @@ twrite(const char *buf, int buflen, int show_ctrl)
 	Rune u;
 	int n;
 
+	int su0 = su;
+	twrite_aborted = 0;
+
 	for (n = 0; n < buflen; n += charsize) {
 		if (IS_SET(MODE_UTF8)) {
 			/* process a complete utf8 char */
@@ -2517,6 +2557,10 @@ twrite(const char *buf, int buflen, int show_ctrl)
 			u = buf[n] & 0xFF;
 			charsize = 1;
 		}
+		if (su0 && !su) {
+			twrite_aborted = 1;
+			break;  // ESU - allow rendering before a new BSU
+		}
 		if (show_ctrl && ISCONTROL(u)) {
 			if (u & 0x80) {
 				u &= 0x7f;

st.h

@@ -124,3 +124,4 @@ extern unsigned int tabspaces;
 extern unsigned int defaultfg;
 extern unsigned int defaultbg;
 extern unsigned int defaultcs;
+extern float alpha;

st.info

@@ -191,6 +191,7 @@ st-mono| simpleterm monocolor,
 	Ms=\E]52;%p1%s;%p2%s\007,
 	Se=\E[2 q,
 	Ss=\E[%p1%d q,
+	Sync=\EP=%p1%ds\E\\,
 
 st| simpleterm,
 	use=st-mono,

x.c

@@ -14,7 +14,6 @@
 #include <X11/keysym.h>
 #include <X11/Xft/Xft.h>
 #include <X11/XKBlib.h>
-#include <X11/extensions/Xrandr.h>
 
 char *argv0;
 #include "arg.h"
@@ -46,19 +45,6 @@ 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
@@ -95,6 +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 */
@@ -119,6 +106,7 @@ typedef struct {
 	XSetWindowAttributes attrs;
 	int scr;
 	int isfixed; /* is fixed geometry? */
+	int depth; /* bit depth */
 	int l, t; /* left and top offset */
 	int gm; /* geometry mask */
 } XWindow;
@@ -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;
@@ -262,6 +245,7 @@ static char *usedfont = NULL;
 static double usedfontsize = 0;
 static double defaultfontsize = 0;
 
+static char *opt_alpha = NULL;
 static char *opt_class = NULL;
 static char **opt_cmd  = NULL;
 static char *opt_embed = NULL;
@@ -350,7 +334,7 @@ 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;
 }
@@ -358,7 +342,7 @@ 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;
 }
@@ -705,6 +689,8 @@ setsel(char *str, Time t)
 	XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
 	if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
 		selclear();
+
+	xclipcopy();
 }
 
 void
@@ -728,7 +714,9 @@ brelease(XEvent *e)
 
 	if (mouseaction(e, 1))
 		return;
-	if (btn == Button1)
+	if (btn == Button3)
+		selpaste(NULL);
+	else if (btn == Button1)
 		mousesel(e, 1);
 }
 
@@ -758,6 +746,9 @@ 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);
@@ -771,7 +762,7 @@ xresize(int col, int row)
 
 	XFreePixmap(xw.dpy, xw.buf);
 	xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
-			DefaultDepth(xw.dpy, xw.scr));
+			xw.depth);
 	XftDrawChange(xw.draw, xw.buf);
 	xclear(0, 0, win.w, win.h);
 
@@ -831,6 +822,13 @@ xloadcols(void)
 			else
 				die("could not allocate color %d\n", i);
 		}
+
+	/* set alpha value of bg color */
+	if (opt_alpha)
+		alpha = strtof(opt_alpha, NULL);
+	dc.col[defaultbg].color.alpha = (unsigned short)(0xffff * alpha);
+	dc.col[defaultbg].pixel &= 0x00FFFFFF;
+	dc.col[defaultbg].pixel |= (unsigned char)(0xff * alpha) << 24;
 	loaded = 1;
 }
 
@@ -888,8 +886,8 @@ xhints(void)
 	sizeh->flags = PSize | PResizeInc | PBaseSize | PMinSize;
 	sizeh->height = win.h;
 	sizeh->width = win.w;
-	sizeh->height_inc = win.ch;
+	sizeh->height_inc = 1;
-	sizeh->width_inc = win.cw;
+	sizeh->width_inc = 1;
 	sizeh->base_height = 2 * borderpx;
 	sizeh->base_width = 2 * borderpx;
 	sizeh->min_height = win.ch + 2 * borderpx;
@@ -1153,11 +1151,23 @@ xinit(int cols, int rows)
 	Window parent;
 	pid_t thispid = getpid();
 	XColor xmousefg, xmousebg;
+	XWindowAttributes attr;
+	XVisualInfo vis;
 
 	if (!(xw.dpy = XOpenDisplay(NULL)))
 		die("can't open display\n");
 	xw.scr = XDefaultScreen(xw.dpy);
-	xw.vis = XDefaultVisual(xw.dpy, xw.scr);
+
+	if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0)))) {
+		parent = XRootWindow(xw.dpy, xw.scr);
+		xw.depth = 32;
+	} else {
+		XGetWindowAttributes(xw.dpy, parent, &attr);
+		xw.depth = attr.depth;
+	}
+
+	XMatchVisualInfo(xw.dpy, xw.scr, xw.depth, TrueColor, &vis);
+	xw.vis = vis.visual;
 
 	/* font */
 	if (!FcInit())
@@ -1167,12 +1177,12 @@ xinit(int cols, int rows)
 	xloadfonts(usedfont, 0);
 
 	/* colors */
-	xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
+	xw.cmap = XCreateColormap(xw.dpy, parent, xw.vis, None);
 	xloadcols();
 
 	/* adjust fixed window geometry */
-	win.w = 2 * borderpx + cols * win.cw;
+	win.w = 2 * win.hborderpx + 2 * borderpx + cols * win.cw;
-	win.h = 2 * borderpx + rows * win.ch;
+	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)
@@ -1187,19 +1197,15 @@ xinit(int cols, int rows)
 		| ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
 	xw.attrs.colormap = xw.cmap;
 
-	if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
-		parent = XRootWindow(xw.dpy, xw.scr);
 	xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
-			win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
+			win.w, win.h, 0, xw.depth, InputOutput,
 			xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
 			| CWEventMask | CWColormap, &xw.attrs);
 
 	memset(&gcvalues, 0, sizeof(gcvalues));
 	gcvalues.graphics_exposures = False;
-	dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
+	xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h, xw.depth);
-			&gcvalues);
+	dc.gc = XCreateGC(xw.dpy, xw.buf, GCGraphicsExposures, &gcvalues);
-	xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
-			DefaultDepth(xw.dpy, xw.scr));
 	XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
 	XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
 
@@ -1261,7 +1267,7 @@ 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;
@@ -1394,7 +1400,7 @@ 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;
@@ -1431,10 +1437,6 @@ 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];
@@ -1484,17 +1486,17 @@ xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, i
 
 	/* Intelligent cleaning up of the borders. */
 	if (x == 0) {
-		xclear(0, (y == 0)? 0 : winy, borderpx,
+		xclear(0, (y == 0)? 0 : winy, win.hborderpx,
 			winy + win.ch +
-			((winy + win.ch >= borderpx + win.th)? win.h : 0));
+			((winy + win.ch >= win.vborderpx + win.th)? win.h : 0));
 	}
-	if (winx + width >= borderpx + win.tw) {
+	if (winx + width >= win.hborderpx + win.tw) {
 		xclear(winx + width, (y == 0)? 0 : winy, win.w,
-			((winy + win.ch >= borderpx + win.th)? win.h : (winy + win.ch)));
+			((winy + win.ch >= win.vborderpx + win.th)? win.h : (winy + win.ch)));
 	}
 	if (y == 0)
-		xclear(winx, 0, winx + width, borderpx);
+		xclear(winx, 0, winx + width, win.vborderpx);
-	if (winy + win.ch >= borderpx + win.th)
+	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. */
@@ -1539,6 +1541,7 @@ 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))
@@ -1567,12 +1570,22 @@ xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
 		if (selected(cx, cy)) {
 			g.fg = defaultfg;
 			g.bg = defaultrcs;
-		} else {
+		} else if (!(og.mode & ATTR_REVERSE)) {
-			g.fg = defaultbg;
+			unsigned long col = g.bg;
-			g.bg = defaultcs;
+			g.bg = g.fg;
+			g.fg = col;
 		}
+
+		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 */
 	if (IS_SET(MODE_FOCUSED)) {
@@ -1588,35 +1601,35 @@ 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,
+					win.hborderpx + cx * win.cw,
-					borderpx + (cy + 1) * win.ch - \
+					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,
+					win.hborderpx + cx * win.cw,
-					borderpx + cy * win.ch,
+					win.vborderpx + cy * win.ch,
 					cursorthickness, win.ch);
 			break;
 		}
 	} else {
 		XftDrawRect(xw.draw, &drawcol,
-				borderpx + cx * win.cw,
+				win.hborderpx + cx * win.cw,
-				borderpx + cy * win.ch,
+				win.vborderpx + cy * win.ch,
 				win.cw - 1, 1);
 		XftDrawRect(xw.draw, &drawcol,
-				borderpx + cx * win.cw,
+				win.hborderpx + cx * win.cw,
-				borderpx + cy * win.ch,
+				win.vborderpx + cy * win.ch,
 				1, win.ch - 1);
 		XftDrawRect(xw.draw, &drawcol,
-				borderpx + (cx + 1) * win.cw - 1,
+				win.hborderpx + (cx + 1) * win.cw - 1,
-				borderpx + cy * win.ch,
+				win.vborderpx + cy * win.ch,
 				1, win.ch - 1);
 		XftDrawRect(xw.draw, &drawcol,
-				borderpx + cx * win.cw,
+				win.hborderpx + cx * win.cw,
-				borderpx + (cy + 1) * win.ch - 1,
+				win.vborderpx + (cy + 1) * win.ch - 1,
 				win.cw, 1);
 	}
 }
@@ -1772,144 +1785,6 @@ 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)
 {
@@ -2062,20 +1937,15 @@ 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;
 
 	cresize(e->xconfigure.width, e->xconfigure.height);
 }
 
+int tinsync(uint);
+int ttyread_pending();
+
 void
 run(void)
 {
@@ -2102,22 +1972,6 @@ 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);
 
@@ -2126,7 +1980,7 @@ run(void)
 		FD_SET(ttyfd, &rfd);
 		FD_SET(xfd, &rfd);
 
-		if (XPending(xw.dpy))
+		if (XPending(xw.dpy) || ttyread_pending())
 			timeout = 0;  /* existing events might not set xfd */
 
 		seltv.tv_sec = timeout / 1E3;
@@ -2140,7 +1994,8 @@ run(void)
 		}
 		clock_gettime(CLOCK_MONOTONIC, &now);
 
-		if (FD_ISSET(ttyfd, &rfd))
+		int ttyin = FD_ISSET(ttyfd, &rfd) || ttyread_pending();
+		if (ttyin)
 			ttyread();
 
 		xev = 0;
@@ -2149,16 +2004,6 @@ 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);
 		}
@@ -2174,7 +2019,7 @@ run(void)
 		 * maximum latency intervals during `cat huge.txt`, and perfect
 		 * sync with periodic updates from animations/key-repeats/etc.
 		 */
-		if (FD_ISSET(ttyfd, &rfd) || xev) {
+		if (ttyin || xev) {
 			if (!drawing) {
 				trigger = now;
 				drawing = 1;
@@ -2185,6 +2030,18 @@ run(void)
 				continue;  /* we have time, try to find idle */
 		}
 
+		if (tinsync(su_timeout)) {
+			/*
+			 * on synchronized-update draw-suspension: don't reset
+			 * drawing so that we draw ASAP once we can (just after
+			 * ESU). it won't be too soon because we already can
+			 * draw now but we skip. we set timeout > 0 to draw on
+			 * SU-timeout even without new content.
+			 */
+			timeout = minlatency;
+			continue;
+		}
+
 		/* idle detected or maxlatency exhausted -> draw */
 		timeout = -1;
 		if (blinktimeout && tattrset(ATTR_BLINK)) {
@@ -2229,6 +2086,9 @@ main(int argc, char *argv[])
 	case 'a':
 		allowaltscreen = 0;
 		break;
+	case 'A':
+		opt_alpha = EARGF(usage());
+		break;
 	case 'c':
 		opt_class = EARGF(usage());
 		break;