Adding reflow patch (#120)

README.md

@@ -15,6 +15,8 @@ Refer to [https://st.suckless.org/](https://st.suckless.org/) for details on the
 
 ### Changelog:
 
+2024-03-09 - Added the reflow patch
+
 2024-03-07 - Improved sixel support, removed VIM browse patch
 
 2022-10-24 - Added the fullscreen patch
@@ -231,6 +233,10 @@ Refer to [https://st.suckless.org/](https://st.suckless.org/) for details on the
         ~and 07 in order to facilitate the use of theme setting scripts like~
         [~theme.sh~](https://github.com/lemnos/theme.sh) ~which expect these colours to be distinct~
 
+   - reflow
+      - allows st to be resized without cutting off text when the terminal window is made larger again
+      - text wraps when the terminal window is made smaller
+
    - [relativeborder](https://st.suckless.org/patches/relativeborder/)
       - allows you to specify a border that is relative in size to the width of a cell in the
         terminal

config.def.h

@@ -73,6 +73,12 @@ static float chscale = 1.0;
  */
 wchar_t *worddelimiters = L" ";
 
+#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+/* Word delimiters for short and long jumps in the keyboard select patch */
+wchar_t *kbds_sdelim = L"!\"#$%&'()*+,-./:;<=>?@[\\]^`{|}~ ";
+wchar_t *kbds_ldelim = L" ";
+#endif // KEYBOARDSELECT_PATCH
+
 /* selection timeouts (in milliseconds) */
 static unsigned int doubleclicktimeout = 300;
 static unsigned int tripleclicktimeout = 600;
@@ -221,6 +227,11 @@ unsigned int selectionbg = 259;
 /* Else if 1 keep original foreground-color of each cell => more colors :) */
 static int ignoreselfg = 1;
 #endif // SELECTION_COLORS_PATCH
+#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+/* Foreground and background color of search results */
+unsigned int highlightfg = 15;
+unsigned int highlightbg = 160;
+#endif // KEYBOARDSELECT_PATCH
 
 #if BLINKING_CURSOR_PATCH
 /*
@@ -321,6 +332,10 @@ ResourcePref resources[] = {
 		#if ALPHA_FOCUS_HIGHLIGHT_PATCH
 		{ "alphaUnfocused",FLOAT,  &alphaUnfocused },
 		#endif // ALPHA_FOCUS_HIGHLIGHT_PATCH
+		#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+		{ "highlightfg",  INTEGER, &highlightfg },
+		{ "highlightbg",  INTEGER, &highlightbg },
+		#endif // KEYBOARDSELECT_PATCH
 };
 #endif // XRESOURCES_PATCH
 
@@ -352,7 +367,7 @@ static MouseShortcut mshortcuts[] = {
 	{ ShiftMask,            Button4, ttysend,        {.s = "\033[5;2~"} },
 	{ ShiftMask,            Button5, ttysend,        {.s = "\033[6;2~"} },
 	#endif // SCROLLBACK_MOUSE_PATCH
-	#if SCROLLBACK_MOUSE_ALTSCREEN_PATCH
+	#if SCROLLBACK_MOUSE_ALTSCREEN_PATCH || REFLOW_PATCH
 	{ XK_NO_MOD,            Button4, kscrollup,      {.i = 1},      0, S_PRI },
 	{ XK_NO_MOD,            Button5, kscrolldown,    {.i = 1},      0, S_PRI },
 	{ XK_ANY_MOD,           Button4, ttysend,        {.s = "\031"}, 0, S_ALT },
@@ -432,6 +447,10 @@ static Shortcut shortcuts[] = {
 	#if KEYBOARDSELECT_PATCH
 	{ TERMMOD,              XK_Escape,      keyboard_select, { 0 } },
 	#endif // KEYBOARDSELECT_PATCH
+	#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+	{ TERMMOD,              XK_F,           searchforward,   { 0 } },
+	{ TERMMOD,              XK_B,           searchbackward,  { 0 } },
+	#endif // KEYBOARDSELECT_PATCH
 	#if ISO14755_PATCH
 	{ TERMMOD,              XK_I,           iso14755,        {.i =  0} },
 	#endif // ISO14755_PATCH

patch/keyboardselect_reflow.txt

@@ -0,0 +1,29 @@
+Shortcuts in keyboard selection mode:
+
+h, j, k, l:              move cursor left/down/up/right (also with arrow keys)
+H, M, L:                 move cursor to the top/middle/bottom of the screen
+Home, End:               move cursor to the top/bottom of the screen
+Backspace or 0, $ or A:  move cursor to the beginning/end of the line
+^ or I:                  move cursor to the beginning of the indented line
+!:                       move cursor to the middle of the row
+_:                       move cursor to the right edge of the screen
+*:                       move cursor to the center of the screen
+w, W                     jump forward to the start of a word
+e, E                     jump forward to the end of a word
+b, B                     jump backward to the start of a word
+g, G:                    go to the first/last line
+z:                       center the screen on the cursor
+PgUp or K, PgDown or J:  scroll the page up/down
+/, ?:                    activate input mode and search up/down
+n, N:                    repeat last search and search forward/backward
+f, F:                    jump forward/backward to the given character
+t, T:                    jump forward/backward to before the given character
+; or r                   repeat previous f, t, F or T movement and move forward
+, or R                   repeat previous f, t, F or T movement and move backward
+v:                       toggle selection mode
+V:                       toggle line selection mode
+s:                       toggle regular/rectangular selection type
+y:                       yank (copy) selected text
+0 - 9:                   set the quantifier
+Return:                  quit keyboard_select, yank and keep the highlight of the selection
+Escape, q:               quit keyboard_select/exit input mode/exit selection mode/reset quantifier

patch/keyboardselect_reflow_st.c

@@ -0,0 +1,769 @@
+#include <wctype.h>
+
+enum keyboardselect_mode {
+	KBDS_MODE_MOVE    = 0,
+	KBDS_MODE_SELECT  = 1<<1,
+	KBDS_MODE_LSELECT = 1<<2,
+	KBDS_MODE_FIND    = 1<<3,
+	KBDS_MODE_SEARCH  = 1<<4,
+};
+
+enum cursor_wrap {
+	KBDS_WRAP_NONE    = 0,
+	KBDS_WRAP_LINE    = 1<<0,
+	KBDS_WRAP_EDGE    = 1<<1,
+};
+
+typedef struct {
+	int x;
+	int y;
+	Line line;
+	int len;
+} KCursor;
+
+static int kbds_in_use, kbds_quant;
+static int kbds_seltype = SEL_REGULAR;
+static int kbds_mode, kbds_directsearch;
+static int kbds_searchlen, kbds_searchdir, kbds_searchcase;
+static int kbds_finddir, kbds_findtill;
+static Glyph *kbds_searchstr;
+static Rune kbds_findchar;
+static KCursor kbds_c, kbds_oc;
+
+void
+kbds_drawstatusbar(int y)
+{
+	static char *modes[] = { " MOVE ", "", " SELECT ", " RSELECT ", " LSELECT ",
+	                         " SEARCH FW ", " SEARCH BW ", " FIND FW ", " FIND BW " };
+	static char quant[20] = { ' ' };
+	static Glyph g;
+	int i, n, m;
+	int mlen, qlen;
+
+	if (!kbds_in_use)
+		return;
+
+	g.mode = ATTR_REVERSE;
+	g.fg = defaultfg;
+	g.bg = defaultbg;
+
+	if (y == 0) {
+		if (kbds_issearchmode())
+			m = 5 + (kbds_searchdir < 0 ? 1 : 0);
+		else if (kbds_mode & KBDS_MODE_FIND)
+			m = 7 + (kbds_finddir < 0 ? 1 : 0);
+		else if (kbds_mode & KBDS_MODE_SELECT)
+			m = 2 + (kbds_seltype == SEL_RECTANGULAR ? 1 : 0);
+		else
+			m = kbds_mode;
+		mlen = strlen(modes[m]);
+		qlen = kbds_quant ? snprintf(quant+1, sizeof quant-1, "%i", kbds_quant) + 1 : 0;
+		if (kbds_c.y != y || kbds_c.x < term.col - qlen - mlen) {
+			for (n = mlen, i = term.col-1; i >= 0 && n > 0; i--) {
+				g.u = modes[m][--n];
+				xdrawglyph(g, i, y);
+			}
+			for (n = qlen; i >= 0 && n > 0; i--) {
+				g.u = quant[--n];
+				xdrawglyph(g, i, y);
+			}
+		}
+	}
+
+	if (y == term.row-1 && kbds_issearchmode()) {
+		for (g.u = ' ', i = 0; i < term.col; i++)
+			xdrawglyph(g, i, y);
+		g.u = (kbds_searchdir > 0) ? '/' : '?';
+		xdrawglyph(g, 0, y);
+		for (i = 0; i < kbds_searchlen; i++) {
+			g.u = kbds_searchstr[i].u;
+			g.mode = kbds_searchstr[i].mode | ATTR_WIDE | ATTR_REVERSE;
+			if (g.u == ' ' || g.mode & ATTR_WDUMMY)
+				continue;
+			xdrawglyph(g, i + 1, y);
+		}
+		g.u = ' ';
+		g.mode = ATTR_NULL;
+		xdrawglyph(g, i + 1, y);
+	}
+}
+
+void
+kbds_pasteintosearch(const char *data, int len, int append)
+{
+	static char buf[BUFSIZ];
+	static int buflen;
+	Rune u;
+	int l, n, charsize;
+
+	if (!append)
+		buflen = 0;
+
+	for (; len > 0; len -= l, data += l) {
+		l = MIN(sizeof(buf) - buflen, len);
+		memmove(buf + buflen, data, l);
+		buflen += l;
+		for (n = 0; n < buflen; n += charsize) {
+			if (IS_SET(MODE_UTF8)) {
+				/* process a complete utf8 char */
+				charsize = utf8decode(buf + n, &u, buflen - n);
+				if (charsize == 0)
+					break;
+			} else {
+				u = buf[n] & 0xFF;
+				charsize = 1;
+			}
+			if (u > 0x1f && kbds_searchlen < term.col-2) {
+				kbds_searchstr[kbds_searchlen].u = u;
+				kbds_searchstr[kbds_searchlen++].mode = ATTR_NULL;
+				if (wcwidth(u) > 1) {
+					kbds_searchstr[kbds_searchlen-1].mode = ATTR_WIDE;
+					if (kbds_searchlen < term.col-2) {
+						kbds_searchstr[kbds_searchlen].u = 0;
+						kbds_searchstr[kbds_searchlen++].mode = ATTR_WDUMMY;
+					}
+				}
+			}
+		}
+		buflen -= n;
+		/* keep any incomplete UTF-8 byte sequence for the next call */
+		if (buflen > 0)
+			memmove(buf, buf + n, buflen);
+	}
+	term.dirty[term.row-1] = 1;
+}
+
+int
+kbds_top(void)
+{
+	return IS_SET(MODE_ALTSCREEN) ? 0 : -term.histf + term.scr;
+}
+
+int
+kbds_bot(void)
+{
+	return IS_SET(MODE_ALTSCREEN) ? term.row-1 : term.row-1 + term.scr;
+}
+
+int
+kbds_iswrapped(KCursor *c)
+{
+    return c->len > 0 && (c->line[c->len-1].mode & ATTR_WRAP);
+}
+
+int
+kbds_isselectmode(void)
+{
+	return kbds_in_use && (kbds_mode & (KBDS_MODE_SELECT | KBDS_MODE_LSELECT));
+}
+
+int
+kbds_issearchmode(void)
+{
+	return kbds_in_use && (kbds_mode & KBDS_MODE_SEARCH);
+}
+
+void
+kbds_setmode(int mode)
+{
+	kbds_mode = mode;
+	term.dirty[0] = 1;
+}
+
+void
+kbds_selecttext(void)
+{
+	if (kbds_isselectmode()) {
+		if (kbds_mode & KBDS_MODE_LSELECT)
+			selextend(term.col-1, kbds_c.y, SEL_RECTANGULAR, 0);
+		else
+			selextend(kbds_c.x, kbds_c.y, kbds_seltype, 0);
+		if (sel.mode == SEL_IDLE)
+			kbds_setmode(kbds_mode & ~(KBDS_MODE_SELECT | KBDS_MODE_LSELECT));
+	}
+}
+
+void
+kbds_copytoclipboard(void)
+{
+	if (kbds_mode & KBDS_MODE_LSELECT) {
+		selextend(term.col-1, kbds_c.y, SEL_RECTANGULAR, 1);
+		sel.type = SEL_REGULAR;
+	} else {
+		selextend(kbds_c.x, kbds_c.y, kbds_seltype, 1);
+	}
+	xsetsel(getsel());
+
+	#if !CLIPBOARD_PATCH
+	xclipcopy();
+	#endif // CLIPBOARD_PATCH
+}
+
+void
+kbds_clearhighlights(void)
+{
+	int x, y;
+	Line line;
+
+	for (y = (IS_SET(MODE_ALTSCREEN) ? 0 : -term.histf); y < term.row; y++) {
+		line = TLINEABS(y);
+		for (x = 0; x < term.col; x++)
+			line[x].mode &= ~ATTR_HIGHLIGHT;
+	}
+	tfulldirt();
+}
+
+int
+kbds_moveto(int x, int y)
+{
+	if (y < 0)
+		kscrollup(&((Arg){ .i = -y }));
+	else if (y >= term.row)
+		kscrolldown(&((Arg){ .i = y - term.row + 1 }));
+	kbds_c.x = (x < 0) ? 0 : (x > term.col-1) ? term.col-1 : x;
+	kbds_c.y = (y < 0) ? 0 : (y > term.row-1) ? term.row-1 : y;
+	kbds_c.line = TLINE(kbds_c.y);
+	kbds_c.len = tlinelen(kbds_c.line);
+	if (kbds_c.x > 0 && (kbds_c.line[kbds_c.x].mode & ATTR_WDUMMY))
+		kbds_c.x--;
+}
+
+int
+kbds_moveforward(KCursor *c, int dx, int wrap)
+{
+	KCursor n = *c;
+
+	n.x += dx;
+	if (n.x >= 0 && n.x < term.col && (n.line[n.x].mode & ATTR_WDUMMY))
+		n.x += dx;
+
+	if (n.x < 0) {
+		if (!wrap || --n.y < kbds_top())
+			return 0;
+		n.line = TLINE(n.y);
+		n.len = tlinelen(n.line);
+		if ((wrap & KBDS_WRAP_LINE) && kbds_iswrapped(&n))
+			n.x = n.len-1;
+		else if (wrap & KBDS_WRAP_EDGE)
+			n.x = term.col-1;
+		else
+			return 0;
+		n.x -= (n.x > 0 && (n.line[n.x].mode & ATTR_WDUMMY)) ? 1 : 0;
+	} else if (n.x >= term.col) {
+		if (((wrap & KBDS_WRAP_EDGE) ||
+		    ((wrap & KBDS_WRAP_LINE) && kbds_iswrapped(&n))) && ++n.y <= kbds_bot()) {
+			n.line = TLINE(n.y);
+			n.len = tlinelen(n.line);
+			n.x = 0;
+		} else {
+			return 0;
+		}
+	} else if (n.x >= n.len && dx > 0 && (wrap & KBDS_WRAP_LINE)) {
+		if (n.x == n.len && kbds_iswrapped(&n) && n.y < kbds_bot()) {
+			++n.y;
+			n.line = TLINE(n.y);
+			n.len = tlinelen(n.line);
+			n.x = 0;
+		} else if (!(wrap & KBDS_WRAP_EDGE)) {
+			return 0;
+		}
+	}
+	*c = n;
+	return 1;
+}
+
+int
+kbds_ismatch(KCursor c)
+{
+	KCursor m = c;
+	int i, next;
+
+	if (c.x + kbds_searchlen > c.len && (!kbds_iswrapped(&c) || c.y >= kbds_bot()))
+		return 0;
+
+	for (next = 0, i = 0; i < kbds_searchlen; i++) {
+		if (kbds_searchstr[i].mode & ATTR_WDUMMY)
+			continue;
+		if ((next++ && !kbds_moveforward(&c, 1, KBDS_WRAP_LINE)) ||
+		    (kbds_searchcase && kbds_searchstr[i].u != c.line[c.x].u) ||
+		    (!kbds_searchcase && kbds_searchstr[i].u != towlower(c.line[c.x].u)))
+			return 0;
+	}
+
+	for (i = 0; i < kbds_searchlen; i++) {
+		if (!(kbds_searchstr[i].mode & ATTR_WDUMMY)) {
+			m.line[m.x].mode |= ATTR_HIGHLIGHT;
+			kbds_moveforward(&m, 1, KBDS_WRAP_LINE);
+		}
+	}
+	return 1;
+}
+
+int
+kbds_searchall(void)
+{
+	KCursor c;
+	int count = 0;
+
+	if (!kbds_searchlen)
+		return 0;
+
+	for (c.y = kbds_top(); c.y <= kbds_bot(); c.y++) {
+		c.line = TLINE(c.y);
+		c.len = tlinelen(c.line);
+		for (c.x = 0; c.x < c.len; c.x++)
+			count += kbds_ismatch(c);
+	}
+	tfulldirt();
+
+	return count;
+}
+
+void
+kbds_searchnext(int dir)
+{
+	KCursor c = kbds_c, n = kbds_c;
+	int wrapped = 0;
+
+	if (!kbds_searchlen) {
+		kbds_quant = 0;
+		return;
+	}
+
+	if (dir < 0 && c.x > c.len)
+		c.x = c.len;
+
+	for (kbds_quant = MAX(kbds_quant, 1); kbds_quant > 0;) {
+		if (!kbds_moveforward(&c, dir, KBDS_WRAP_LINE)) {
+			c.y += dir;
+			if (c.y < kbds_top())
+				c.y = kbds_bot(), wrapped++;
+			else if (c.y > kbds_bot())
+				c.y = kbds_top(), wrapped++;
+			if (wrapped > 1)
+				break;;
+			c.line = TLINE(c.y);
+			c.len = tlinelen(c.line);
+			c.x = (dir < 0 && c.len > 0) ? c.len-1 : 0;
+			c.x -= (c.x > 0 && (c.line[c.x].mode & ATTR_WDUMMY)) ? 1 : 0;
+		}
+		if (kbds_ismatch(c)) {
+			n = c;
+			kbds_quant--;
+		}
+	}
+
+	kbds_moveto(n.x, n.y);
+	kbds_quant = 0;
+}
+
+void
+kbds_findnext(int dir, int repeat)
+{
+	KCursor prev, c = kbds_c, n = kbds_c;
+	int skipfirst, yoff = 0;
+
+	if (c.len <= 0 || kbds_findchar == 0) {
+		kbds_quant = 0;
+		return;
+	}
+
+	if (dir < 0 && c.x > c.len)
+		c.x = c.len;
+
+	kbds_quant = MAX(kbds_quant, 1);
+	skipfirst = (kbds_quant == 1 && repeat && kbds_findtill);
+
+	while (kbds_quant > 0) {
+		prev = c;
+		if (!kbds_moveforward(&c, dir, KBDS_WRAP_LINE))
+			break;
+		if (c.line[c.x].u == kbds_findchar) {
+			if (skipfirst && prev.x == kbds_c.x && prev.y == kbds_c.y) {
+				skipfirst = 0;
+				continue;
+			}
+			n.x = kbds_findtill ? prev.x : c.x;
+			n.y = c.y;
+			yoff = kbds_findtill ? prev.y - c.y : 0;
+			kbds_quant--;
+		}
+	}
+
+	kbds_moveto(n.x, n.y);
+	kbds_moveto(kbds_c.x, kbds_c.y + yoff);
+	kbds_quant = 0;
+}
+
+int
+kbds_isdelim(KCursor c, int xoff, wchar_t *delims)
+{
+	if (xoff && !kbds_moveforward(&c, xoff, KBDS_WRAP_LINE))
+		return 1;
+	return wcschr(delims, c.line[c.x].u) != NULL;
+}
+
+void
+kbds_nextword(int start, int dir, wchar_t *delims)
+{
+	KCursor c = kbds_c, n = kbds_c;
+	int xoff = start ? -1 : 1;
+
+	if (dir < 0 && c.x > c.len)
+		c.x = c.len;
+	else if (dir > 0 && c.x >= c.len && c.len > 0)
+		c.x = c.len-1;
+
+	for (kbds_quant = MAX(kbds_quant, 1); kbds_quant > 0;) {
+		if (!kbds_moveforward(&c, dir, KBDS_WRAP_LINE)) {
+			c.y += dir;
+			if (c.y < kbds_top() || c.y > kbds_bot())
+				break;
+			c.line = TLINE(c.y);
+			c.len = tlinelen(c.line);
+			c.x = (dir < 0 && c.len > 0) ? c.len-1 : 0;
+			c.x -= (c.x > 0 && (c.line[c.x].mode & ATTR_WDUMMY)) ? 1 : 0;
+		}
+		if (c.len > 0 &&
+		    !kbds_isdelim(c, 0, delims) && kbds_isdelim(c, xoff, delims)) {
+			n = c;
+			kbds_quant--;
+		}
+	}
+
+	kbds_moveto(n.x, n.y);
+	kbds_quant = 0;
+}
+
+int
+kbds_drawcursor(void)
+{
+	if (kbds_in_use && (!kbds_issearchmode() || kbds_c.y != term.row-1)) {
+		#if LIGATURES_PATCH
+		xdrawcursor(kbds_c.x, kbds_c.y, TLINE(kbds_c.y)[kbds_c.x],
+					kbds_oc.x, kbds_oc.y, TLINE(kbds_oc.y)[kbds_oc.x],
+					TLINE(kbds_oc.y), term.col);
+		#else
+		xdrawcursor(kbds_c.x, kbds_c.y, TLINE(kbds_c.y)[kbds_c.x],
+					kbds_oc.x, kbds_oc.y, TLINE(kbds_oc.y)[kbds_oc.x]);
+		#endif // LIGATURES_PATCH
+		kbds_moveto(kbds_c.x, kbds_c.y);
+		kbds_oc = kbds_c;
+	}
+	return term.scr != 0 || kbds_in_use;
+}
+
+int
+kbds_keyboardhandler(KeySym ksym, char *buf, int len, int forcequit)
+{
+	int i, q, dy, eol, islast, prevscr, count, wrap;
+	int alt = IS_SET(MODE_ALTSCREEN);
+	Line line;
+	Rune u;
+
+	if (kbds_issearchmode() && !forcequit) {
+		switch (ksym) {
+			case XK_Escape:
+				kbds_searchlen = 0;
+				/* FALLTHROUGH */
+			case XK_Return:
+				for (kbds_searchcase = 0, i = 0; i < kbds_searchlen; i++) {
+					if (kbds_searchstr[i].u != towlower(kbds_searchstr[i].u)) {
+						kbds_searchcase = 1;
+						break;
+					}
+				}
+				count = kbds_searchall();
+				kbds_searchnext(kbds_searchdir);
+				kbds_selecttext();
+				kbds_setmode(kbds_mode & ~KBDS_MODE_SEARCH);
+				if (count == 0 && kbds_directsearch)
+					ksym = XK_Escape;
+				break;
+			case XK_BackSpace:
+				if (kbds_searchlen) {
+					kbds_searchlen--;
+					if (kbds_searchlen && (kbds_searchstr[kbds_searchlen].mode & ATTR_WDUMMY))
+						kbds_searchlen--;
+				}
+				break;
+			default:
+				if (len < 1 || kbds_searchlen >= term.col-2)
+					return 0;
+				utf8decode(buf, &u, len);
+				kbds_searchstr[kbds_searchlen].u = u;
+				kbds_searchstr[kbds_searchlen++].mode = ATTR_NULL;
+				if (wcwidth(u) > 1) {
+					kbds_searchstr[kbds_searchlen-1].mode = ATTR_WIDE;
+					if (kbds_searchlen < term.col-2) {
+						kbds_searchstr[kbds_searchlen].u = 0;
+						kbds_searchstr[kbds_searchlen++].mode = ATTR_WDUMMY;
+					}
+				}
+				break;
+		}
+		/* If the direct search is aborted, we just go to the next switch
+		 * statement and exit the keyboard selection mode immediately */
+		if (!(ksym == XK_Escape && kbds_directsearch)) {
+			term.dirty[term.row-1] = 1;
+			return 0;
+		}
+	} else if ((kbds_mode & KBDS_MODE_FIND) && !forcequit) {
+		kbds_findchar = 0;
+		switch (ksym) {
+			case XK_Escape:
+			case XK_Return:
+				kbds_quant = 0;
+				break;
+			default:
+				if (len < 1)
+					return 0;
+				utf8decode(buf, &kbds_findchar, len);
+				kbds_findnext(kbds_finddir, 0);
+				kbds_selecttext();
+				break;
+		}
+		kbds_setmode(kbds_mode & ~KBDS_MODE_FIND);
+		return 0;
+	}
+
+	switch (ksym) {
+	case -1:
+		kbds_searchstr = xmalloc(term.col * sizeof(Glyph));
+		kbds_in_use = 1;
+		kbds_moveto(term.c.x, term.c.y);
+		kbds_oc = kbds_c;
+		kbds_setmode(KBDS_MODE_MOVE);
+		return MODE_KBDSELECT;
+	case XK_V:
+		if (kbds_mode & KBDS_MODE_LSELECT) {
+			selclear();
+			kbds_setmode(kbds_mode & ~(KBDS_MODE_SELECT | KBDS_MODE_LSELECT));
+		} else if (kbds_mode & KBDS_MODE_SELECT) {
+			selextend(term.col-1, kbds_c.y, SEL_RECTANGULAR, 0);
+			sel.ob.x = 0;
+			tfulldirt();
+			kbds_setmode((kbds_mode ^ KBDS_MODE_SELECT) | KBDS_MODE_LSELECT);
+		} else {
+			selstart(0, kbds_c.y, 0);
+			selextend(term.col-1, kbds_c.y, SEL_RECTANGULAR, 0);
+			kbds_setmode(kbds_mode | KBDS_MODE_LSELECT);
+		}
+		break;
+	case XK_v:
+		if (kbds_mode & KBDS_MODE_SELECT) {
+			selclear();
+			kbds_setmode(kbds_mode & ~(KBDS_MODE_SELECT | KBDS_MODE_LSELECT));
+		} else if (kbds_mode & KBDS_MODE_LSELECT) {
+			selextend(kbds_c.x, kbds_c.y, kbds_seltype, 0);
+			kbds_setmode((kbds_mode ^ KBDS_MODE_LSELECT) | KBDS_MODE_SELECT);
+		} else {
+			selstart(kbds_c.x, kbds_c.y, 0);
+			kbds_setmode(kbds_mode | KBDS_MODE_SELECT);
+		}
+		break;
+	case XK_s:
+		if (!(kbds_mode & KBDS_MODE_LSELECT)) {
+			kbds_seltype ^= (SEL_REGULAR | SEL_RECTANGULAR);
+			selextend(kbds_c.x, kbds_c.y, kbds_seltype, 0);
+		}
+		break;
+	case XK_y:
+	case XK_Y:
+		if (kbds_isselectmode()) {
+			kbds_copytoclipboard();
+			selclear();
+			kbds_setmode(kbds_mode & ~(KBDS_MODE_SELECT | KBDS_MODE_LSELECT));
+		}
+		break;
+	case -2:
+	case -3:
+	case XK_slash:
+	case XK_KP_Divide:
+	case XK_question:
+		kbds_directsearch = (ksym == -2 || ksym == -3);
+		kbds_searchdir = (ksym == XK_question || ksym == -3) ? -1 : 1;
+		kbds_searchlen = 0;
+		kbds_setmode(kbds_mode | KBDS_MODE_SEARCH);
+		kbds_clearhighlights();
+		return 0;
+	case XK_q:
+	case XK_Escape:
+		if (!kbds_in_use)
+			return 0;
+		if (kbds_quant && !forcequit) {
+			kbds_quant = 0;
+			break;
+		}
+		selclear();
+		if (kbds_isselectmode() && !forcequit) {
+			kbds_setmode(KBDS_MODE_MOVE);
+			break;
+		}
+		kbds_setmode(KBDS_MODE_MOVE);
+		/* FALLTHROUGH */
+	case XK_Return:
+		if (kbds_isselectmode())
+			kbds_copytoclipboard();
+		kbds_in_use = kbds_quant = 0;
+		free(kbds_searchstr);
+		kscrolldown(&((Arg){ .i = term.histf }));
+		kbds_clearhighlights();
+		return MODE_KBDSELECT;
+	case XK_n:
+	case XK_N:
+		kbds_searchnext(ksym == XK_n ? kbds_searchdir : -kbds_searchdir);
+		break;
+	case XK_BackSpace:
+		kbds_moveto(0, kbds_c.y);
+		break;
+	case XK_exclam:
+		kbds_moveto(term.col/2, kbds_c.y);
+		break;
+	case XK_underscore:
+		kbds_moveto(term.col-1, kbds_c.y);
+		break;
+	case XK_dollar:
+	case XK_A:
+		eol = kbds_c.len-1;
+		line = kbds_c.line;
+		islast = (kbds_c.x == eol || (kbds_c.x == eol-1 && (line[eol-1].mode & ATTR_WIDE)));
+		if (islast && kbds_iswrapped(&kbds_c) && kbds_c.y < kbds_bot())
+			kbds_moveto(tlinelen(TLINE(kbds_c.y+1))-1, kbds_c.y+1);
+		else
+			kbds_moveto(islast ? term.col-1 : eol, kbds_c.y);
+		break;
+	case XK_asciicircum:
+	case XK_I:
+		for (i = 0; i < kbds_c.len && kbds_c.line[i].u == ' '; i++)
+			;
+		kbds_moveto((i < kbds_c.len) ? i : 0, kbds_c.y);
+		break;
+	case XK_End:
+	case XK_KP_End:
+		kbds_moveto(kbds_c.x, term.row-1);
+		break;
+	case XK_Home:
+	case XK_KP_Home:
+	case XK_H:
+		kbds_moveto(kbds_c.x, 0);
+		break;
+	case XK_M:
+		kbds_moveto(kbds_c.x, alt ? (term.row-1) / 2
+                                  : MIN(term.c.y + term.scr, term.row-1) / 2);
+		break;
+	case XK_L:
+		kbds_moveto(kbds_c.x, alt ? term.row-1
+		                          : MIN(term.c.y + term.scr, term.row-1));
+		break;
+	case XK_Page_Up:
+	case XK_KP_Page_Up:
+	case XK_K:
+		prevscr = term.scr;
+		kscrollup(&((Arg){ .i = term.row }));
+		kbds_moveto(kbds_c.x, alt ? 0
+		                          : MAX(0, kbds_c.y - term.row + term.scr - prevscr));
+		break;
+	case XK_Page_Down:
+	case XK_KP_Page_Down:
+	case XK_J:
+		prevscr = term.scr;
+		kscrolldown(&((Arg){ .i = term.row }));
+		kbds_moveto(kbds_c.x, alt ? term.row-1
+		                          : MIN(MIN(term.c.y + term.scr, term.row-1),
+		                                    kbds_c.y + term.row + term.scr - prevscr));
+		break;
+	case XK_asterisk:
+	case XK_KP_Multiply:
+		kbds_moveto(term.col/2, (term.row-1) / 2);
+		break;
+	case XK_g:
+		kscrollup(&((Arg){ .i = term.histf }));
+		kbds_moveto(kbds_c.x, 0);
+		break;
+	case XK_G:
+		kscrolldown(&((Arg){ .i = term.histf }));
+		kbds_moveto(kbds_c.x, alt ? term.row-1 : term.c.y);
+		break;
+	case XK_b:
+	case XK_B:
+		kbds_nextword(1, -1, (ksym == XK_b) ? kbds_sdelim : kbds_ldelim);
+		break;
+	case XK_w:
+	case XK_W:
+		kbds_nextword(1, +1, (ksym == XK_w) ? kbds_sdelim : kbds_ldelim);
+		break;
+	case XK_e:
+	case XK_E:
+		kbds_nextword(0, +1, (ksym == XK_e) ? kbds_sdelim : kbds_ldelim);
+		break;
+	case XK_z:
+		prevscr = term.scr;
+		dy = kbds_c.y - (term.row-1) / 2;
+		if (dy <= 0)
+			kscrollup(&((Arg){ .i = -dy }));
+		else
+			kscrolldown(&((Arg){ .i = dy }));
+		kbds_moveto(kbds_c.x, kbds_c.y + term.scr - prevscr);
+		break;
+	case XK_f:
+	case XK_F:
+	case XK_t:
+	case XK_T:
+		kbds_finddir = (ksym == XK_f || ksym == XK_t) ? 1 : -1;
+		kbds_findtill = (ksym == XK_t || ksym == XK_T) ? 1 : 0;
+		kbds_setmode(kbds_mode | KBDS_MODE_FIND);
+		return 0;
+	case XK_semicolon:
+	case XK_r:
+		kbds_findnext(kbds_finddir, 1);
+		break;
+	case XK_comma:
+	case XK_R:
+		kbds_findnext(-kbds_finddir, 1);
+		break;
+	case XK_0:
+	case XK_KP_0:
+		if (!kbds_quant) {
+			kbds_moveto(0, kbds_c.y);
+			break;
+		}
+		/* FALLTHROUGH */
+	default:
+		if (ksym >= XK_0 && ksym <= XK_9) {                 /* 0-9 keyboard */
+			q = (kbds_quant * 10) + (ksym ^ XK_0);
+			kbds_quant = q <= 99999999 ? q : kbds_quant;
+			term.dirty[0] = 1;
+			return 0;
+		} else if (ksym >= XK_KP_0 && ksym <= XK_KP_9) {    /* 0-9 numpad */
+			q = (kbds_quant * 10) + (ksym ^ XK_KP_0);
+			kbds_quant = q <= 99999999 ? q : kbds_quant;
+			term.dirty[0] = 1;
+			return 0;
+		} else if (ksym == XK_k || ksym == XK_h)
+			i = ksym & 1;
+		else if (ksym == XK_l || ksym == XK_j)
+			i = ((ksym & 6) | 4) >> 1;
+		else if (ksym >= XK_KP_Left && ksym <= XK_KP_Down)
+			i = ksym - XK_KP_Left;
+		else if ((XK_Home & ksym) != XK_Home || (i = (ksym ^ XK_Home) - 1) > 3)
+			return 0;
+
+		kbds_quant = (kbds_quant ? kbds_quant : 1);
+
+		if (i & 1) {
+			kbds_c.y += kbds_quant * (i & 2 ? 1 : -1);
+		} else {
+			for (;kbds_quant > 0; kbds_quant--) {
+				if (!kbds_moveforward(&kbds_c, (i & 2) ? 1 : -1,
+					    KBDS_WRAP_LINE | KBDS_WRAP_EDGE))
+					break;
+			}
+		}
+		kbds_moveto(kbds_c.x, kbds_c.y);
+	}
+	kbds_selecttext();
+	kbds_quant = 0;
+	term.dirty[0] = 1;
+	return 0;
+}

patch/keyboardselect_reflow_st.h

@@ -0,0 +1,6 @@
+void kbds_drawstatusbar(int y);
+void kbds_pasteintosearch(const char *, int, int);
+int kbds_isselectmode(void);
+int kbds_issearchmode(void);
+int kbds_drawcursor(void);
+int kbds_keyboardhandler(KeySym, char *, int, int);

patch/keyboardselect_reflow_x.c

@@ -0,0 +1,16 @@
+void keyboard_select(const Arg *dummy)
+{
+    win.mode ^= kbds_keyboardhandler(-1, NULL, 0, 0);
+}
+
+void searchforward(const Arg *)
+{
+    win.mode ^= kbds_keyboardhandler(-1, NULL, 0, 0);
+    kbds_keyboardhandler(-2, NULL, 0, 0);
+}
+
+void searchbackward(const Arg *)
+{
+    win.mode ^= kbds_keyboardhandler(-1, NULL, 0, 0);
+    kbds_keyboardhandler(-3, NULL, 0, 0);
+}

patch/keyboardselect_reflow_x.h

@@ -0,0 +1,3 @@
+void keyboard_select(const Arg *);
+void searchforward(const Arg *);
+void searchbackward(const Arg *);

patch/keyboardselect_x.c

@@ -1,7 +1,7 @@
 void toggle_winmode(int flag) {
-        win.mode ^= flag;
+    win.mode ^= flag;
 }
 
 void keyboard_select(const Arg *dummy) {
     win.mode ^= trt_kbdselect(-1, NULL, 0);
-}
+}

patch/openurlonclick.c

@@ -1,8 +1,10 @@
+#if !REFLOW_PATCH
 #if SCROLLBACK_PATCH
 #define TLINEURL(y) TLINE(y)
 #else
 #define TLINEURL(y) term.line[y]
 #endif // SCROLLBACK_PATCH
+#endif // REFLOW_PATCH
 
 int url_x1, url_y1, url_x2, url_y2 = -1;
 int url_draw, url_click, url_maxcol;
@@ -20,6 +22,20 @@ isvalidurlchar(Rune u)
 }
 
 /* find the end of the wrapped line */
+#if REFLOW_PATCH
+static int
+findeowl(Line line)
+{
+	int i = term.col - 1;
+
+	do {
+		if (line[i].mode & ATTR_WRAP)
+			return i;
+	} while (!(line[i].mode & ATTR_SET) && --i >= 0);
+
+	return -1;
+}
+#else
 static int
 findeowl(int row)
 {
@@ -35,6 +51,7 @@ findeowl(int row)
 	} while (TLINEURL(row)[col].u == ' ' && --col >= 0);
 	return -1;
 }
+#endif // REFLOW_PATCH
 
 void
 clearurl(void)
@@ -44,6 +61,84 @@ clearurl(void)
 	url_y2 = -1;
 }
 
+#if REFLOW_PATCH
+char *
+detecturl(int col, int row, int draw)
+{
+	static char url[2048];
+	Line line;
+	int x1, y1, x2, y2;
+	int i = sizeof(url)/2+1, j = sizeof(url)/2;
+	int row_start = row, col_start = col;
+	int minrow = tisaltscr() ? 0 : term.scr - term.histf;
+	int maxrow = tisaltscr() ? term.row - 1 : term.scr + term.row - 1;
+
+	/* clear previously underlined url */
+	if (draw)
+		clearurl();
+
+	url_maxcol = 0;
+	line = TLINE(row);
+
+	if (!isvalidurlchar(line[col].u))
+		return NULL;
+
+	/* find the first character of url */
+	do {
+		x1 = col_start, y1 = row_start;
+		url_maxcol = MAX(url_maxcol, x1);
+		url[--i] = line[col_start].u;
+		if (--col_start < 0) {
+			if (--row_start < minrow || (col_start = findeowl(TLINE(row_start))) < 0)
+				break;
+			line = TLINE(row_start);
+		}
+	} while (isvalidurlchar(line[col_start].u) && i > 0);
+
+	/* early detection */
+	if (url[i] != 'h')
+		return NULL;
+
+	/* find the last character of url */
+	line = TLINE(row);
+	do {
+		x2 = col, y2 = row;
+		url_maxcol = MAX(url_maxcol, x2);
+		url[j++] = line[col].u;
+		if (line[col++].mode & ATTR_WRAP) {
+			if (++row > maxrow)
+				break;
+			col = 0;
+			line = TLINE(row);
+		}
+	} while (col < term.col && isvalidurlchar(line[col].u) && j < sizeof(url)-1);
+
+	url[j] = 0;
+
+	if (strncmp("https://", &url[i], 8) && strncmp("http://", &url[i], 7))
+		return NULL;
+
+	/* Ignore some trailing characters to improve detection. */
+	/* Alacritty and many other terminals also ignore these. */
+	if (strchr(",.;:?!", (int)(url[j-1])) != NULL) {
+		x2 = MAX(x2-1, 0);
+		url[j-1] = 0;
+	}
+
+	/* underline url (see xdrawglyphfontspecs() in x.c) */
+	if (draw) {
+		url_x1 = (y1 >= 0) ? x1 : 0;
+		url_x2 = (y2 < term.row) ? x2 : url_maxcol;
+		url_y1 = MAX(y1, 0);
+		url_y2 = MIN(y2, term.row-1);
+		url_draw = 1;
+		for (y1 = url_y1; y1 <= url_y2; y1++)
+			term.dirty[y1] = 1;
+	}
+
+	return &url[i];
+}
+#else
 char *
 detecturl(int col, int row, int draw)
 {
@@ -52,6 +147,7 @@ detecturl(int col, int row, int draw)
 	int row_start = row;
 	int col_start = col;
 	int i = sizeof(url)/2+1, j = sizeof(url)/2;
+
 	#if SCROLLBACK_PATCH
 	int minrow = term.scr - term.histn, maxrow = term.scr + term.row - 1;
 	/* Fixme: MODE_ALTSCREEN is not defined here, I had to use the magic number 1<<2 */
@@ -59,7 +155,7 @@ detecturl(int col, int row, int draw)
 		minrow = 0, maxrow = term.row - 1;
 	#else
 	int minrow = 0, maxrow = term.row - 1;
-	#endif // scrollback_patch
+	#endif // SCROLLBACK_PATCH
 	url_maxcol = 0;
 
 	/* clear previously underlined url */
@@ -119,6 +215,7 @@ detecturl(int col, int row, int draw)
 
 	return &url[i];
 }
+#endif // REFLOW_PATCH
 
 void
 openUrlOnClick(int col, int row, char* url_opener)

patch/reflow.c

@@ -0,0 +1,931 @@
+void
+tloaddefscreen(int clear, int loadcursor)
+{
+	int col, row, alt = IS_SET(MODE_ALTSCREEN);
+
+	if (alt) {
+		if (clear) {
+			tclearregion(0, 0, term.col-1, term.row-1, 1);
+			#if SIXEL_PATCH
+			tdeleteimages();
+			#endif // SIXEL_PATCH
+		}
+		col = term.col, row = term.row;
+		tswapscreen();
+	}
+	if (loadcursor)
+		tcursor(CURSOR_LOAD);
+	if (alt)
+		tresizedef(col, row);
+}
+
+void
+tloadaltscreen(int clear, int savecursor)
+{
+	int col, row, def = !IS_SET(MODE_ALTSCREEN);
+
+	if (savecursor)
+		tcursor(CURSOR_SAVE);
+	if (def) {
+		col = term.col, row = term.row;
+		kscrolldown(&((Arg){ .i = term.scr }));
+		tswapscreen();
+		tresizealt(col, row);
+	}
+	if (clear) {
+		tclearregion(0, 0, term.col-1, term.row-1, 1);
+		#if SIXEL_PATCH
+		tdeleteimages();
+		#endif // SIXEL_PATCH
+	}
+}
+
+void
+selmove(int n)
+{
+	sel.ob.y += n, sel.nb.y += n;
+	sel.oe.y += n, sel.ne.y += n;
+}
+
+void
+tclearglyph(Glyph *gp, int usecurattr)
+{
+	if (usecurattr) {
+		gp->fg = term.c.attr.fg;
+		gp->bg = term.c.attr.bg;
+	} else {
+		gp->fg = defaultfg;
+		gp->bg = defaultbg;
+	}
+	gp->mode = ATTR_NULL;
+	gp->u = ' ';
+}
+
+#if SIXEL_PATCH
+void
+treflow_moveimages(int oldy, int newy)
+{
+	ImageList *im;
+
+	for (im = term.images; im; im = im->next) {
+		if (im->y == oldy)
+			im->reflow_y = newy;
+	}
+}
+#endif // SIXEL_PATCH
+
+void
+treflow(int col, int row)
+{
+	int i, j, x, x2;
+	int oce, nce, bot, scr;
+	int ox = 0, oy = -term.histf, nx = 0, ny = -1, len;
+	int cy = -1; /* proxy for new y coordinate of cursor */
+	int buflen, nlines, del;
+	Line *buf, bufline, line;
+	#if SIXEL_PATCH
+	ImageList *im, *next;
+
+	for (im = term.images; im; im = im->next)
+		im->reflow_y = INT_MIN; /* unset reflow_y */
+	#endif // SIXEL_PATCH
+
+	/* y coordinate of cursor line end */
+	for (oce = term.c.y; oce < term.row - 1 &&
+	                     tiswrapped(term.line[oce]); oce++);
+
+	nlines = HISTSIZE + row;
+	buf = xmalloc(nlines * sizeof(Line));
+	do {
+		if (!nx && ++ny < nlines)
+			buf[ny] = xmalloc(col * sizeof(Glyph));
+		if (!ox) {
+			line = TLINEABS(oy);
+			len = tlinelen(line);
+		}
+		if (oy == term.c.y) {
+			if (!ox)
+				len = MAX(len, term.c.x + 1);
+			/* update cursor */
+			if (cy < 0 && term.c.x - ox < col - nx) {
+				term.c.x = nx + term.c.x - ox, cy = ny;
+				UPDATEWRAPNEXT(0, col);
+			}
+		}
+		/* get reflowed lines in buf */
+		bufline = buf[ny % nlines];
+		if (col - nx > len - ox) {
+			memcpy(&bufline[nx], &line[ox], (len-ox) * sizeof(Glyph));
+			nx += len - ox;
+			if (len == 0 || !(line[len - 1].mode & ATTR_WRAP)) {
+				for (j = nx; j < col; j++)
+					tclearglyph(&bufline[j], 0);
+				#if SIXEL_PATCH
+				treflow_moveimages(oy+term.scr, ny);
+				#endif // SIXEL_PATCH
+				nx = 0;
+			} else if (nx > 0) {
+				bufline[nx - 1].mode &= ~ATTR_WRAP;
+			}
+			ox = 0, oy++;
+		} else if (col - nx == len - ox) {
+			memcpy(&bufline[nx], &line[ox], (col-nx) * sizeof(Glyph));
+			#if SIXEL_PATCH
+			treflow_moveimages(oy+term.scr, ny);
+			#endif // SIXEL_PATCH
+			ox = 0, oy++, nx = 0;
+		} else/* if (col - nx < len - ox) */ {
+			memcpy(&bufline[nx], &line[ox], (col-nx) * sizeof(Glyph));
+			if (bufline[col - 1].mode & ATTR_WIDE) {
+				bufline[col - 2].mode |= ATTR_WRAP;
+				tclearglyph(&bufline[col - 1], 0);
+				ox--;
+			} else {
+				bufline[col - 1].mode |= ATTR_WRAP;
+			}
+			#if SIXEL_PATCH
+			treflow_moveimages(oy+term.scr, ny);
+			#endif // SIXEL_PATCH
+			ox += col - nx;
+			nx = 0;
+		}
+	} while (oy <= oce);
+	if (nx)
+		for (j = nx; j < col; j++)
+			tclearglyph(&bufline[j], 0);
+
+	/* free extra lines */
+	for (i = row; i < term.row; i++)
+		free(term.line[i]);
+	/* resize to new height */
+	term.line = xrealloc(term.line, row * sizeof(Line));
+
+	buflen = MIN(ny + 1, nlines);
+	bot = MIN(ny, row - 1);
+	scr = MAX(row - term.row, 0);
+	/* update y coordinate of cursor line end */
+	nce = MIN(oce + scr, bot);
+	/* update cursor y coordinate */
+	term.c.y = nce - (ny - cy);
+	if (term.c.y < 0) {
+		j = nce, nce = MIN(nce + -term.c.y, bot);
+		term.c.y += nce - j;
+		while (term.c.y < 0) {
+			free(buf[ny-- % nlines]);
+			buflen--;
+			term.c.y++;
+		}
+	}
+	/* allocate new rows */
+	for (i = row - 1; i > nce; i--) {
+		if (i >= term.row)
+			term.line[i] = xmalloc(col * sizeof(Glyph));
+		else
+			term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
+		for (j = 0; j < col; j++)
+			tclearglyph(&term.line[i][j], 0);
+	}
+	/* fill visible area */
+	for (/*i = nce */; i >= term.row; i--, ny--, buflen--)
+		term.line[i] = buf[ny % nlines];
+	for (/*i = term.row - 1 */; i >= 0; i--, ny--, buflen--) {
+		free(term.line[i]);
+		term.line[i] = buf[ny % nlines];
+	}
+	/* fill lines in history buffer and update term.histf */
+	for (/*i = -1 */; buflen > 0 && i >= -HISTSIZE; i--, ny--, buflen--) {
+		j = (term.histi + i + 1 + HISTSIZE) % HISTSIZE;
+		free(term.hist[j]);
+		term.hist[j] = buf[ny % nlines];
+	}
+	term.histf = -i - 1;
+	term.scr = MIN(term.scr, term.histf);
+	/* resize rest of the history lines */
+	for (/*i = -term.histf - 1 */; i >= -HISTSIZE; i--) {
+		j = (term.histi + i + 1 + HISTSIZE) % HISTSIZE;
+		term.hist[j] = xrealloc(term.hist[j], col * sizeof(Glyph));
+	}
+
+	#if SIXEL_PATCH
+	/* move images to the final position */
+	for (im = term.images; im; im = next) {
+		next = im->next;
+		if (im->reflow_y == INT_MIN) {
+			delete_image(im);
+		} else {
+			im->y = im->reflow_y - term.histf + term.scr - (ny + 1);
+			if (im->y - term.scr < -HISTSIZE || im->y - term.scr >= row)
+				delete_image(im);
+		}
+	}
+
+	/* expand images into new text cells or
+	 * delete images if there is text behind them */
+	for (im = term.images; im; im = next) {
+		next = im->next;
+		if (im->x < col) {
+			line = TLINE(im->y);
+			x2 = MIN(im->x + im->cols, col);
+			for (del = 0, x = im->x; x < x2; x++) {
+				if ((del = line[x].mode & ATTR_SET))
+					break;
+				line[x].u = ' ';
+				line[x].mode = ATTR_SIXEL;
+			}
+			if (del)
+				delete_image(im);
+		}
+	}
+	#endif // SIXEL_PATCH
+
+	for (; buflen > 0; ny--, buflen--)
+		free(buf[ny % nlines]);
+	free(buf);
+}
+
+void
+rscrolldown(int n)
+{
+	int i;
+	Line temp;
+
+	/* can never be true as of now
+	if (IS_SET(MODE_ALTSCREEN))
+		return; */
+
+	if ((n = MIN(n, term.histf)) <= 0)
+		return;
+
+	for (i = term.c.y + n; i >= n; i--) {
+		temp = term.line[i];
+		term.line[i] = term.line[i-n];
+		term.line[i-n] = temp;
+	}
+	for (/*i = n - 1 */; i >= 0; i--) {
+		temp = term.line[i];
+		term.line[i] = term.hist[term.histi];
+		term.hist[term.histi] = temp;
+		term.histi = (term.histi - 1 + HISTSIZE) % HISTSIZE;
+	}
+	term.c.y += n;
+	term.histf -= n;
+	if ((i = term.scr - n) >= 0) {
+		term.scr = i;
+	} else {
+		#if SIXEL_PATCH
+		scroll_images(n - term.scr);
+		#endif // SIXEL_PATCH
+		term.scr = 0;
+		if (sel.ob.x != -1 && !sel.alt)
+			selmove(-i);
+	}
+}
+
+void
+tresizedef(int col, int row)
+{
+	int i, j;
+
+	/* return if dimensions haven't changed */
+	if (term.col == col && term.row == row) {
+		tfulldirt();
+		return;
+	}
+	if (col != term.col) {
+		if (!sel.alt)
+			selremove();
+		treflow(col, row);
+	} else {
+		/* slide screen up if otherwise cursor would get out of the screen */
+		if (term.c.y >= row) {
+			tscrollup(0, term.row - 1, term.c.y - row + 1, SCROLL_RESIZE);
+			term.c.y = row - 1;
+		}
+		for (i = row; i < term.row; i++)
+			free(term.line[i]);
+
+		/* resize to new height */
+		term.line = xrealloc(term.line, row * sizeof(Line));
+		/* allocate any new rows */
+		for (i = term.row; i < row; i++) {
+			term.line[i] = xmalloc(col * sizeof(Glyph));
+			for (j = 0; j < col; j++)
+				tclearglyph(&term.line[i][j], 0);
+		}
+		/* scroll down as much as height has increased */
+		rscrolldown(row - term.row);
+	}
+	/* update terminal size */
+	term.col = col, term.row = row;
+	/* reset scrolling region */
+	term.top = 0, term.bot = row - 1;
+	/* dirty all lines */
+	tfulldirt();
+}
+
+void
+tresizealt(int col, int row)
+{
+	int i, j;
+	#if SIXEL_PATCH
+	ImageList *im, *next;
+	#endif // SIXEL_PATCH
+
+	/* return if dimensions haven't changed */
+	if (term.col == col && term.row == row) {
+		tfulldirt();
+		return;
+	}
+	if (sel.alt)
+		selremove();
+	/* slide screen up if otherwise cursor would get out of the screen */
+	for (i = 0; i <= term.c.y - row; i++)
+		free(term.line[i]);
+	if (i > 0) {
+		/* ensure that both src and dst are not NULL */
+		memmove(term.line, term.line + i, row * sizeof(Line));
+		#if SIXEL_PATCH
+		scroll_images(-i);
+		#endif // SIXEL_PATCH
+		term.c.y = row - 1;
+	}
+	for (i += row; i < term.row; i++)
+		free(term.line[i]);
+	/* resize to new height */
+	term.line = xrealloc(term.line, row * sizeof(Line));
+	/* resize to new width */
+	for (i = 0; i < MIN(row, term.row); i++) {
+		term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
+		for (j = term.col; j < col; j++)
+			tclearglyph(&term.line[i][j], 0);
+	}
+	/* allocate any new rows */
+	for (/*i = MIN(row, term.row) */; i < row; i++) {
+		term.line[i] = xmalloc(col * sizeof(Glyph));
+		for (j = 0; j < col; j++)
+			tclearglyph(&term.line[i][j], 0);
+	}
+	/* update cursor */
+	if (term.c.x >= col) {
+		term.c.state &= ~CURSOR_WRAPNEXT;
+		term.c.x = col - 1;
+	} else {
+		UPDATEWRAPNEXT(1, col);
+	}
+	/* update terminal size */
+	term.col = col, term.row = row;
+	/* reset scrolling region */
+	term.top = 0, term.bot = row - 1;
+
+	#if SIXEL_PATCH
+	/* delete or clip images if they are not inside the screen */
+	for (im = term.images; im; im = next) {
+		next = im->next;
+		if (im->x >= term.col || im->y >= term.row || im->y < 0) {
+			delete_image(im);
+		} else {
+			if ((im->cols = MIN(im->x + im->cols, term.col) - im->x) <= 0)
+				delete_image(im);
+		}
+	}
+	#endif // SIXEL_PATCH
+
+	/* dirty all lines */
+	tfulldirt();
+}
+
+void
+kscrolldown(const Arg* a)
+{
+	int n = a->i;
+
+	if (!term.scr || IS_SET(MODE_ALTSCREEN))
+		return;
+
+	if (n < 0)
+		n = MAX(term.row / -n, 1);
+
+	if (n <= term.scr) {
+		term.scr -= n;
+	} else {
+		n = term.scr;
+		term.scr = 0;
+	}
+
+	if (sel.ob.x != -1 && !sel.alt)
+		selmove(-n); /* negate change in term.scr */
+	tfulldirt();
+
+	#if SIXEL_PATCH
+	scroll_images(-1*n);
+	#endif // SIXEL_PATCH
+
+	#if OPENURLONCLICK_PATCH
+	if (n > 0)
+		restoremousecursor();
+	#endif // OPENURLONCLICK_PATCH
+}
+
+void
+kscrollup(const Arg* a)
+{
+	int n = a->i;
+
+	if (!term.histf || IS_SET(MODE_ALTSCREEN))
+		return;
+
+	if (n < 0)
+		n = MAX(term.row / -n, 1);
+
+	if (term.scr + n <= term.histf) {
+		term.scr += n;
+	} else {
+		n = term.histf - term.scr;
+		term.scr = term.histf;
+	}
+
+	if (sel.ob.x != -1 && !sel.alt)
+		selmove(n); /* negate change in term.scr */
+	tfulldirt();
+
+	#if SIXEL_PATCH
+	scroll_images(n);
+	#endif // SIXEL_PATCH
+
+	#if OPENURLONCLICK_PATCH
+	if (n > 0)
+		restoremousecursor();
+	#endif // OPENURLONCLICK_PATCH
+}
+
+void
+tscrollup(int top, int bot, int n, int mode)
+{
+	#if OPENURLONCLICK_PATCH
+	restoremousecursor();
+	#endif //OPENURLONCLICK_PATCH
+
+	int i, j, s;
+	Line temp;
+	int alt = IS_SET(MODE_ALTSCREEN);
+	int savehist = !alt && top == 0 && mode != SCROLL_NOSAVEHIST;
+	int scr = alt ? 0 : term.scr;
+	#if SIXEL_PATCH
+	int itop = top + scr, ibot = bot + scr;
+	ImageList *im, *next;
+	#endif // SIXEL_PATCH
+
+	if (n <= 0)
+		return;
+	n = MIN(n, bot-top+1);
+
+	if (savehist) {
+		for (i = 0; i < n; i++) {
+			term.histi = (term.histi + 1) % HISTSIZE;
+			temp = term.hist[term.histi];
+			for (j = 0; j < term.col; j++)
+				tclearglyph(&temp[j], 1);
+			term.hist[term.histi] = term.line[i];
+			term.line[i] = temp;
+		}
+		term.histf = MIN(term.histf + n, HISTSIZE);
+		s = n;
+		if (term.scr) {
+			j = term.scr;
+			term.scr = MIN(j + n, HISTSIZE);
+			s = j + n - term.scr;
+		}
+		if (mode != SCROLL_RESIZE)
+			tfulldirt();
+	} else {
+		tclearregion(0, top, term.col-1, top+n-1, 1);
+		tsetdirt(top + scr, bot + scr);
+	}
+
+	for (i = top; i <= bot-n; i++) {
+		temp = term.line[i];
+		term.line[i] = term.line[i+n];
+		term.line[i+n] = temp;
+	}
+
+	#if SIXEL_PATCH
+	if (alt || !savehist) {
+		/* move images, if they are inside the scrolling region */
+		for (im = term.images; im; im = next) {
+			next = im->next;
+			if (im->y >= itop && im->y <= ibot) {
+				im->y -= n;
+				if (im->y < itop)
+					delete_image(im);
+			}
+		}
+	} else {
+		/* move images, if they are inside the scrolling region or scrollback */
+		for (im = term.images; im; im = next) {
+			next = im->next;
+			im->y -= scr;
+			if (im->y < 0) {
+				im->y -= n;
+			} else if (im->y >= top && im->y <= bot) {
+				im->y -= n;
+				if (im->y < top)
+					im->y -= top; // move to scrollback
+			}
+			if (im->y < -HISTSIZE)
+				delete_image(im);
+			else
+				im->y += term.scr;
+		}
+	}
+	#endif // SIXEL_PATCH
+
+	if (sel.ob.x != -1 && sel.alt == alt) {
+		if (!savehist) {
+			selscroll(top, bot, -n);
+		} else if (s > 0) {
+			selmove(-s);
+			if (-term.scr + sel.nb.y < -term.histf)
+				selremove();
+		}
+	}
+}
+
+void
+tscrolldown(int top, int n)
+{
+	#if OPENURLONCLICK_PATCH
+	restoremousecursor();
+	#endif //OPENURLONCLICK_PATCH
+
+	int i, bot = term.bot;
+	int scr = IS_SET(MODE_ALTSCREEN) ? 0 : term.scr;
+	int itop = top + scr, ibot = bot + scr;
+	Line temp;
+	#if SIXEL_PATCH
+	ImageList *im, *next;
+	#endif // SIXEL_PATCH
+
+	if (n <= 0)
+		return;
+	n = MIN(n, bot-top+1);
+
+	tsetdirt(top + scr, bot + scr);
+	tclearregion(0, bot-n+1, term.col-1, bot, 1);
+
+	for (i = bot; i >= top+n; i--) {
+		temp = term.line[i];
+		term.line[i] = term.line[i-n];
+		term.line[i-n] = temp;
+	}
+
+	#if SIXEL_PATCH
+	/* move images, if they are inside the scrolling region */
+	for (im = term.images; im; im = next) {
+		next = im->next;
+		if (im->y >= itop && im->y <= ibot) {
+			im->y += n;
+			if (im->y > ibot)
+				delete_image(im);
+		}
+	}
+	#endif // SIXEL_PATCH
+
+	if (sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN))
+		selscroll(top, bot, n);
+}
+
+void
+tresize(int col, int row)
+{
+	int *bp;
+
+	#if KEYBOARDSELECT_PATCH
+	if (row != term.row || col != term.col)
+		win.mode ^= kbds_keyboardhandler(XK_Escape, NULL, 0, 1);
+	#endif // KEYBOARDSELECT_PATCH
+
+	term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
+	term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
+	if (col > term.col) {
+		bp = term.tabs + term.col;
+		memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
+		while (--bp > term.tabs && !*bp)
+			/* nothing */ ;
+		for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
+			*bp = 1;
+	}
+
+	if (IS_SET(MODE_ALTSCREEN))
+		tresizealt(col, row);
+	else
+		tresizedef(col, row);
+}
+
+void
+tclearregion(int x1, int y1, int x2, int y2, int usecurattr)
+{
+	int x, y;
+
+	/* regionselected() takes relative coordinates */
+	if (regionselected(x1+term.scr, y1+term.scr, x2+term.scr, y2+term.scr))
+		selremove();
+
+	for (y = y1; y <= y2; y++) {
+		term.dirty[y] = 1;
+		for (x = x1; x <= x2; x++)
+			tclearglyph(&term.line[y][x], usecurattr);
+	}
+}
+
+void
+tnew(int col, int row)
+{
+	int i, j;
+	for (i = 0; i < 2; i++) {
+		term.line = xmalloc(row * sizeof(Line));
+		for (j = 0; j < row; j++)
+			term.line[j] = xmalloc(col * sizeof(Glyph));
+		term.col = col, term.row = row;
+		tswapscreen();
+	}
+	term.dirty = xmalloc(row * sizeof(*term.dirty));
+	term.tabs = xmalloc(col * sizeof(*term.tabs));
+	for (i = 0; i < HISTSIZE; i++)
+		term.hist[i] = xmalloc(col * sizeof(Glyph));
+	treset();
+}
+
+void
+tdeletechar(int n)
+{
+	int src, dst, size;
+	Line line;
+
+	if (n <= 0)
+		return;
+	dst = term.c.x;
+	src = MIN(term.c.x + n, term.col);
+	size = term.col - src;
+	if (size > 0) { /* otherwise src would point beyond the array
+	                   https://stackoverflow.com/questions/29844298 */
+		line = term.line[term.c.y];
+		memmove(&line[dst], &line[src], size * sizeof(Glyph));
+	}
+	tclearregion(dst + size, term.c.y, term.col - 1, term.c.y, 1);
+}
+
+void
+tinsertblank(int n)
+{
+	int src, dst, size;
+	Line line;
+
+	if (n <= 0)
+		return;
+	dst = MIN(term.c.x + n, term.col);
+	src = term.c.x;
+	size = term.col - dst;
+
+	if (size > 0) { /* otherwise dst would point beyond the array */
+		line = term.line[term.c.y];
+		memmove(&line[dst], &line[src], size * sizeof(Glyph));
+	}
+	tclearregion(src, term.c.y, dst - 1, term.c.y, 1);
+}
+
+int
+tlinelen(Line line)
+{
+	int i = term.col - 1;
+
+	/* We are using a different algorithm on the alt screen because an
+	 * application might use spaces to clear the screen and in that case it is
+	 * impossible to find the end of the line when every cell has the ATTR_SET
+	 * attribute. The second algorithm is more accurate on the main screen and
+	 * and we can use it there. */
+	if (IS_SET(MODE_ALTSCREEN))
+		for (; i >= 0 && !(line[i].mode & ATTR_WRAP) && line[i].u == ' '; i--);
+	else
+		for (; i >= 0 && !(line[i].mode & (ATTR_SET | ATTR_WRAP)); i--);
+
+	return i + 1;
+}
+
+int
+tiswrapped(Line line)
+{
+	int len = tlinelen(line);
+
+	return len > 0 && (line[len - 1].mode & ATTR_WRAP);
+}
+
+char *
+tgetglyphs(char *buf, const Glyph *gp, const Glyph *lgp)
+{
+	while (gp <= lgp)
+		if (gp->mode & ATTR_WDUMMY) {
+			gp++;
+		} else {
+			buf += utf8encode((gp++)->u, buf);
+		}
+	return buf;
+}
+
+size_t
+tgetline(char *buf, const Glyph *fgp)
+{
+	char *ptr;
+	const Glyph *lgp = &fgp[term.col - 1];
+
+	while (lgp > fgp && !(lgp->mode & (ATTR_SET | ATTR_WRAP)))
+		lgp--;
+	ptr = tgetglyphs(buf, fgp, lgp);
+	if (!(lgp->mode & ATTR_WRAP))
+		*(ptr++) = '\n';
+	return ptr - buf;
+}
+
+int
+regionselected(int x1, int y1, int x2, int y2)
+{
+	if (sel.ob.x == -1 || sel.mode == SEL_EMPTY ||
+	    sel.alt != IS_SET(MODE_ALTSCREEN) || sel.nb.y > y2 || sel.ne.y < y1)
+		return 0;
+
+	return (sel.type == SEL_RECTANGULAR) ? sel.nb.x <= x2 && sel.ne.x >= x1
+		: (sel.nb.y != y2 || sel.nb.x <= x2) &&
+		  (sel.ne.y != y1 || sel.ne.x >= x1);
+}
+
+int
+selected(int x, int y)
+{
+	return regionselected(x, y, x, y);
+}
+
+void
+selsnap(int *x, int *y, int direction)
+{
+	int newx, newy;
+	int rtop = 0, rbot = term.row - 1;
+	int delim, prevdelim, maxlen;
+	const Glyph *gp, *prevgp;
+
+	if (!IS_SET(MODE_ALTSCREEN))
+		rtop += -term.histf + term.scr, rbot += term.scr;
+
+	switch (sel.snap) {
+	case SNAP_WORD:
+		/*
+		 * Snap around if the word wraps around at the end or
+		 * beginning of a line.
+		 */
+		maxlen = (TLINE(*y)[term.col-2].mode & ATTR_WRAP) ? term.col-1 : term.col;
+		LIMIT(*x, 0, maxlen - 1);
+		prevgp = &TLINE(*y)[*x];
+		prevdelim = ISDELIM(prevgp->u);
+		for (;;) {
+			newx = *x + direction;
+			newy = *y;
+			if (!BETWEEN(newx, 0, maxlen - 1)) {
+				newy += direction;
+				if (!BETWEEN(newy, rtop, rbot))
+					break;
+
+				if (!tiswrapped(TLINE(direction > 0 ? *y : newy)))
+					break;
+
+				maxlen = (TLINE(newy)[term.col-2].mode & ATTR_WRAP) ? term.col-1 : term.col;
+				newx = direction > 0 ? 0 : maxlen - 1;
+			}
+
+			gp = &TLINE(newy)[newx];
+			delim = ISDELIM(gp->u);
+			if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
+					|| (delim && gp->u != prevgp->u)))
+				break;
+
+			*x = newx;
+			*y = newy;
+			if (!(gp->mode & ATTR_WDUMMY)) {
+				prevgp = gp;
+				prevdelim = delim;
+			}
+		}
+		break;
+	case SNAP_LINE:
+		/*
+		 * Snap around if the the previous line or the current one
+		 * has set ATTR_WRAP at its end. Then the whole next or
+		 * previous line will be selected.
+		 */
+		*x = (direction < 0) ? 0 : term.col - 1;
+		if (direction < 0) {
+			for (; *y > rtop; *y -= 1) {
+				if (!tiswrapped(TLINE(*y-1)))
+					break;
+			}
+		} else if (direction > 0) {
+			for (; *y < rbot; *y += 1) {
+				if (!tiswrapped(TLINE(*y)))
+					break;
+			}
+		}
+		break;
+	}
+}
+
+void
+selscroll(int top, int bot, int n)
+{
+	/* turn absolute coordinates into relative */
+	top += term.scr, bot += term.scr;
+
+	if (BETWEEN(sel.nb.y, top, bot) != BETWEEN(sel.ne.y, top, bot)) {
+		selclear();
+	} else if (BETWEEN(sel.nb.y, top, bot)) {
+		selmove(n);
+		if (sel.nb.y < top || sel.ne.y > bot)
+			selclear();
+	}
+}
+
+void
+tswapscreen(void)
+{
+	static Line *altline;
+	static int altcol, altrow;
+	Line *tmpline = term.line;
+	int tmpcol = term.col, tmprow = term.row;
+	#if SIXEL_PATCH
+	ImageList *im = term.images;
+	#endif // SIXEL_PATCH
+
+	term.line = altline;
+	term.col = altcol, term.row = altrow;
+	altline = tmpline;
+	altcol = tmpcol, altrow = tmprow;
+	term.mode ^= MODE_ALTSCREEN;
+
+	#if SIXEL_PATCH
+	term.images = term.images_alt;
+	term.images_alt = im;
+	#endif // SIXEL_PATCH
+}
+
+char *
+getsel(void)
+{
+	char *str, *ptr;
+	int y, lastx, linelen;
+	const Glyph *gp, *lgp;
+
+	if (sel.ob.x == -1 || sel.alt != IS_SET(MODE_ALTSCREEN))
+		return NULL;
+
+	str = xmalloc((term.col + 1) * (sel.ne.y - sel.nb.y + 1) * UTF_SIZ);
+	ptr = str;
+
+	/* append every set & selected glyph to the selection */
+	for (y = sel.nb.y; y <= sel.ne.y; y++) {
+		Line line = TLINE(y);
+
+		if ((linelen = tlinelen(line)) == 0) {
+			*ptr++ = '\n';
+			continue;
+		}
+
+		if (sel.type == SEL_RECTANGULAR) {
+			gp = &line[sel.nb.x];
+			lastx = sel.ne.x;
+		} else {
+			gp = &line[sel.nb.y == y ? sel.nb.x : 0];
+			lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
+		}
+		lgp = &line[MIN(lastx, linelen-1)];
+
+		ptr = tgetglyphs(ptr, gp, lgp);
+		/*
+		 * Copy and pasting of line endings is inconsistent
+		 * in the inconsistent terminal and GUI world.
+		 * The best solution seems like to produce '\n' when
+		 * something is copied from st and convert '\n' to
+		 * '\r', when something to be pasted is received by
+		 * st.
+		 * FIXME: Fix the computer world.
+		 */
+		if ((y < sel.ne.y || lastx >= linelen) &&
+		    (!(lgp->mode & ATTR_WRAP) || sel.type == SEL_RECTANGULAR))
+			*ptr++ = '\n';
+	}
+	*ptr = '\0';
+	return str;
+}
+
+void
+tdumpline(int n)
+{
+	char str[(term.col + 1) * UTF_SIZ];
+
+	tprinter(str, tgetline(str, &term.line[n][0]));
+}

patch/reflow.h

@@ -0,0 +1,44 @@
+#define TLINE(y) ( \
+	(y) < term.scr ? term.hist[(term.histi + (y) - term.scr + 1 + HISTSIZE) % HISTSIZE] \
+	               : term.line[(y) - term.scr] \
+)
+
+#define TLINEABS(y) ( \
+	(y) < 0 ? term.hist[(term.histi + (y) + 1 + HISTSIZE) % HISTSIZE] : term.line[(y)] \
+)
+
+#define UPDATEWRAPNEXT(alt, col) do { \
+	if ((term.c.state & CURSOR_WRAPNEXT) && term.c.x + term.wrapcwidth[alt] < col) { \
+		term.c.x += term.wrapcwidth[alt]; \
+		term.c.state &= ~CURSOR_WRAPNEXT; \
+	} \
+} while (0);
+
+static int tiswrapped(Line line);
+static size_t tgetline(char *, const Glyph *);
+static inline int regionselected(int, int, int, int);
+static void tloaddefscreen(int, int);
+static void tloadaltscreen(int, int);
+static void selmove(int);
+static inline void tclearglyph(Glyph *, int);
+static void treflow(int, int);
+static void rscrolldown(int);
+static void tresizedef(int, int);
+static void tresizealt(int, int);
+void kscrolldown(const Arg *);
+void kscrollup(const Arg *);
+static void tscrollup(int, int, int, int);
+static void tclearregion(int, int, int, int, int);
+static void tdeletechar(int);
+static int tlinelen(Line len);
+static char * tgetglyphs(char *buf, const Glyph *gp, const Glyph *lgp);
+static void selscroll(int, int, int);
+
+typedef struct {
+	 uint b;
+	 uint mask;
+	 void (*func)(const Arg *);
+	 const Arg arg;
+} MouseKey;
+
+extern MouseKey mkeys[];

patch/st_include.c

@@ -8,7 +8,9 @@
 #if ISO14755_PATCH
 #include "iso14755.c"
 #endif
-#if KEYBOARDSELECT_PATCH
+#if REFLOW_PATCH && KEYBOARDSELECT_PATCH
+#include "keyboardselect_reflow_st.c"
+#elif KEYBOARDSELECT_PATCH
 #include "keyboardselect_st.c"
 #endif
 #if RIGHTCLICKTOPLUMB_PATCH
@@ -17,7 +19,9 @@
 #if NEWTERM_PATCH
 #include "newterm.c"
 #endif
-#if SCROLLBACK_PATCH || SCROLLBACK_MOUSE_PATCH || SCROLLBACK_MOUSE_ALTSCREEN_PATCH
+#if REFLOW_PATCH
+#include "reflow.c"
+#elif SCROLLBACK_PATCH || SCROLLBACK_MOUSE_PATCH || SCROLLBACK_MOUSE_ALTSCREEN_PATCH
 #include "scrollback.c"
 #endif
 #if SYNC_PATCH

patch/st_include.h

@@ -8,7 +8,9 @@
 #if ISO14755_PATCH
 #include "iso14755.h"
 #endif
-#if KEYBOARDSELECT_PATCH
+#if REFLOW_PATCH && KEYBOARDSELECT_PATCH
+#include "keyboardselect_reflow_st.h"
+#elif KEYBOARDSELECT_PATCH
 #include "keyboardselect_st.h"
 #endif
 #if OPENURLONCLICK_PATCH
@@ -20,7 +22,9 @@
 #if NEWTERM_PATCH
 #include "newterm.h"
 #endif
-#if SCROLLBACK_PATCH || SCROLLBACK_MOUSE_PATCH || SCROLLBACK_MOUSE_ALTSCREEN_PATCH
+#if REFLOW_PATCH
+#include "reflow.h"
+#elif SCROLLBACK_PATCH || SCROLLBACK_MOUSE_PATCH || SCROLLBACK_MOUSE_ALTSCREEN_PATCH
 #include "scrollback.h"
 #endif
 #if SYNC_PATCH

patch/x_include.c

@@ -23,7 +23,9 @@
 #if INVERT_PATCH
 #include "invert.c"
 #endif
-#if KEYBOARDSELECT_PATCH
+#if REFLOW_PATCH && KEYBOARDSELECT_PATCH
+#include "keyboardselect_reflow_x.c"
+#elif KEYBOARDSELECT_PATCH
 #include "keyboardselect_x.c"
 #endif
 #if OPENURLONCLICK_PATCH

patch/x_include.h

@@ -20,7 +20,10 @@
 #if INVERT_PATCH
 #include "invert.h"
 #endif
-#if KEYBOARDSELECT_PATCH
+#if REFLOW_PATCH && KEYBOARDSELECT_PATCH
+#include "keyboardselect_reflow_st.h"
+#include "keyboardselect_reflow_x.h"
+#elif KEYBOARDSELECT_PATCH
 #include "keyboardselect_x.h"
 #endif
 #if NETWMICON_PATCH

patches.def.h

@@ -264,6 +264,13 @@
  */
 #define OPENURLONCLICK_PATCH 0
 
+/* Reflow.
+ * Allows st to be resized without cutting off text when the terminal window is made larger again.
+ * Text wraps when the terminal window is made smaller.
+ * Comes with scrollback.
+ */
+#define REFLOW_PATCH 0
+
 /* This patch allows you to specify a border that is relative in size to the width of a cell
  * in the terminal.
  * https://st.suckless.org/patches/relativeborder/

sixel.c

@@ -36,7 +36,7 @@ static sixel_color_t const sixel_default_color_table[] = {
 void
 scroll_images(int n) {
 	ImageList *im, *next;
-	#if SCROLLBACK_PATCH
+	#if SCROLLBACK_PATCH || REFLOW_PATCH
 	int top = tisaltscr() ? 0 : term.scr - HISTSIZE;
 	#else
 	int top = 0;

st.c

@@ -73,6 +73,14 @@ enum term_mode {
 	#endif // SIXEL_PATCH
 };
 
+#if REFLOW_PATCH
+enum scroll_mode {
+	SCROLL_RESIZE = -1,
+	SCROLL_NOSAVEHIST = 0,
+	SCROLL_SAVEHIST = 1
+};
+#endif // REFLOW_PATCH
+
 enum cursor_movement {
 	CURSOR_SAVE,
 	CURSOR_LOAD
@@ -177,27 +185,36 @@ static void tprinter(char *, size_t);
 static void tdumpsel(void);
 static void tdumpline(int);
 static void tdump(void);
+#if !REFLOW_PATCH
 static void tclearregion(int, int, int, int);
+#endif // REFLOW_PATCH
 static void tcursor(int);
+static void tresetcursor(void);
+#if !REFLOW_PATCH
 static void tdeletechar(int);
+#endif // REFLOW_PATCH
 #if SIXEL_PATCH
 static void tdeleteimages(void);
 #endif // SIXEL_PATCH
 static void tdeleteline(int);
 static void tinsertblank(int);
 static void tinsertblankline(int);
+#if !REFLOW_PATCH
 static int tlinelen(int);
+#endif // REFLOW_PATCH
 static void tmoveto(int, int);
 static void tmoveato(int, int);
 static void tnewline(int);
 static void tputtab(int);
 static void tputc(Rune);
 static void treset(void);
+#if !REFLOW_PATCH
 #if SCROLLBACK_PATCH
 static void tscrollup(int, int, int);
 #else
 static void tscrollup(int, int);
 #endif // SCROLLBACK_PATCH
+#endif // REFLOW_PATCH
 static void tscrolldown(int, int);
 static void tsetattr(const int *, int);
 static void tsetchar(Rune, const Glyph *, int, int);
@@ -213,7 +230,9 @@ static int32_t tdefcolor(const int *, int *, int);
 static void tdeftran(char);
 static void tstrsequence(uchar);
 static void selnormalize(void);
+#if !REFLOW_PATCH
 static void selscroll(int, int);
+#endif // REFLOW_PATCH
 static void selsnap(int *, int *, int);
 
 static size_t utf8decode(const char *, Rune *, size_t);
@@ -421,6 +440,7 @@ selinit(void)
 	sel.ob.x = -1;
 }
 
+#if !REFLOW_PATCH
 int
 tlinelen(int y)
 {
@@ -442,6 +462,7 @@ tlinelen(int y)
 
 	return i;
 }
+#endif // REFLOW_PATCH
 
 void
 selstart(int col, int row, int snap)
@@ -455,9 +476,9 @@ selstart(int col, int row, int snap)
 	sel.oe.y = sel.ob.y = row;
 	selnormalize();
 
-    if (sel.snap != 0)
+	if (sel.snap != 0)
-        sel.mode = SEL_READY;
+		sel.mode = SEL_READY;
-    tsetdirt(sel.nb.y, sel.ne.y);
+	tsetdirt(sel.nb.y, sel.ne.y);
 }
 
 void
@@ -480,8 +501,8 @@ selextend(int col, int row, int type, int done)
 
 	sel.oe.x = col;
 	sel.oe.y = row;
-	selnormalize();
 	sel.type = type;
+	selnormalize();
 
 	if (oldey != sel.oe.y || oldex != sel.oe.x || oldtype != sel.type || sel.mode == SEL_EMPTY)
 		tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
@@ -510,13 +531,23 @@ selnormalize(void)
 	/* expand selection over line breaks */
 	if (sel.type == SEL_RECTANGULAR)
 		return;
+
+	#if REFLOW_PATCH
+	i = tlinelen(TLINE(sel.nb.y));
+	if (sel.nb.x > i)
+		sel.nb.x = i;
+	if (sel.ne.x >= tlinelen(TLINE(sel.ne.y)))
+		sel.ne.x = term.col - 1;
+	#else
 	i = tlinelen(sel.nb.y);
 	if (i < sel.nb.x)
 		sel.nb.x = i;
 	if (tlinelen(sel.ne.y) <= sel.ne.x)
 		sel.ne.x = term.col - 1;
+	#endif // REFLOW_PATCH
 }
 
+#if !REFLOW_PATCH
 int
 selected(int x, int y)
 {
@@ -532,7 +563,9 @@ selected(int x, int y)
 	    && (y != sel.nb.y || x >= sel.nb.x)
 	    && (y != sel.ne.y || x <= sel.ne.x);
 }
+#endif // REFLOW_PATCH
 
+#if !REFLOW_PATCH
 void
 selsnap(int *x, int *y, int direction)
 {
@@ -625,7 +658,9 @@ selsnap(int *x, int *y, int direction)
 		break;
 	}
 }
+#endif // REFLOW_PATCH
 
+#if !REFLOW_PATCH
 char *
 getsel(void)
 {
@@ -662,6 +697,7 @@ getsel(void)
 			#endif // SCROLLBACK_PATCH
 			lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
 		}
+
 		#if SCROLLBACK_PATCH
 		last = &TLINE(y)[MIN(lastx, linelen-1)];
 		#else
@@ -693,15 +729,22 @@ getsel(void)
 	*ptr = 0;
 	return str;
 }
+#endif // REFLOW_PATCH
 
 void
 selclear(void)
 {
 	if (sel.ob.x == -1)
 		return;
+	selremove();
+	tsetdirt(sel.nb.y, sel.ne.y);
+}
+
+void
+selremove(void)
+{
 	sel.mode = SEL_IDLE;
 	sel.ob.x = -1;
-	tsetdirt(sel.nb.y, sel.ne.y);
 }
 
 void
@@ -950,10 +993,8 @@ void
 ttywrite(const char *s, size_t n, int may_echo)
 {
 	const char *next;
-	#if SCROLLBACK_PATCH
+	#if REFLOW_PATCH || SCROLLBACK_PATCH
-	Arg arg = (Arg) { .i = term.scr };
+	kscrolldown(&((Arg){ .i = term.scr }));
-
-	kscrolldown(&arg);
 	#endif // SCROLLBACK_PATCH
 
 	if (may_echo && IS_SET(MODE_ECHO))
@@ -1097,7 +1138,11 @@ tsetdirtattr(int attr)
 	for (i = 0; i < term.row-1; i++) {
 		for (j = 0; j < term.col-1; j++) {
 			if (term.line[i][j].mode & attr) {
+				#if REFLOW_PATCH
+				term.dirty[i] = 1;
+				#else
 				tsetdirt(i, i);
+				#endif // REFLOW_PATCH
 				break;
 			}
 		}
@@ -1110,7 +1155,12 @@ tfulldirt(void)
 	#if SYNC_PATCH
 	tsync_end();
 	#endif // SYNC_PATCH
+	#if REFLOW_PATCH
+	for (int i = 0; i < term.row; i++)
+		term.dirty[i] = 1;
+	#else
 	tsetdirt(0, term.row-1);
+	#endif // REFLOW_PATCH
 }
 
 void
@@ -1127,19 +1177,22 @@ tcursor(int mode)
 	}
 }
 
+void
+tresetcursor(void)
+{
+	term.c = (TCursor){ { .mode = ATTR_NULL, .fg = defaultfg, .bg = defaultbg },
+	                    .x = 0, .y = 0, .state = CURSOR_DEFAULT };
+}
+
 void
 treset(void)
 {
 	uint i;
-	#if SIXEL_PATCH
+	#if REFLOW_PATCH
-	ImageList *im;
+	int x, y;
-	#endif // SIXEL_PATCH
+	#endif // REFLOW_PATCH
 
-	term.c = (TCursor){{
+	tresetcursor();
-		.mode = ATTR_NULL,
-		.fg = defaultfg,
-		.bg = defaultbg
-	}, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
 
 	memset(term.tabs, 0, term.col * sizeof(*term.tabs));
 	for (i = tabspaces; i < term.col; i += tabspaces)
@@ -1149,8 +1202,20 @@ treset(void)
 	term.mode = MODE_WRAP|MODE_UTF8;
 	memset(term.trantbl, CS_USA, sizeof(term.trantbl));
 	term.charset = 0;
+	#if REFLOW_PATCH
+	term.histf = 0;
+	term.histi = 0;
+	term.scr = 0;
+	selremove();
+	#endif // REFLOW_PATCH
 
 	for (i = 0; i < 2; i++) {
+		#if REFLOW_PATCH
+		tcursor(CURSOR_SAVE); /* reset saved cursor */
+		for (y = 0; y < term.row; y++)
+			for (x = 0; x < term.col; x++)
+				tclearglyph(&term.line[y][x], 0);
+		#else
 		tmoveto(0, 0);
 		tcursor(CURSOR_SAVE);
 		#if COLUMNS_PATCH
@@ -1158,13 +1223,18 @@ treset(void)
 		#else
 		tclearregion(0, 0, term.col-1, term.row-1);
 		#endif // COLUMNS_PATCH
+		#endif // REFLOW_PATCH
 		#if SIXEL_PATCH
 		tdeleteimages();
 		#endif // SIXEL_PATCH
 		tswapscreen();
 	}
+	#if REFLOW_PATCH
+	tfulldirt();
+	#endif // REFLOW_PATCH
 }
 
+#if !REFLOW_PATCH
 void
 tnew(int col, int row)
 {
@@ -1172,7 +1242,9 @@ tnew(int col, int row)
 	tresize(col, row);
 	treset();
 }
+#endif // REFLOW_PATCH
 
+#if !REFLOW_PATCH
 void
 tswapscreen(void)
 {
@@ -1190,7 +1262,9 @@ tswapscreen(void)
 	term.mode ^= MODE_ALTSCREEN;
 	tfulldirt();
 }
+#endif // REFLOW_PATCH
 
+#if !REFLOW_PATCH
 void
 tscrolldown(int orig, int n)
 {
@@ -1245,7 +1319,9 @@ tscrolldown(int orig, int n)
 	selscroll(orig, n);
 	#endif // SCROLLBACK_PATCH
 }
+#endif // REFLOW_PATCH
 
+#if !REFLOW_PATCH
 void
 #if SCROLLBACK_PATCH
 tscrollup(int orig, int n, int copyhist)
@@ -1350,7 +1426,9 @@ tscrollup(int orig, int n)
 	selscroll(orig, -n);
 	#endif // SCROLLBACK_PATCH
 }
+#endif // REFLOW_PATCH
 
+#if !REFLOW_PATCH
 void
 selscroll(int orig, int n)
 {
@@ -1370,6 +1448,7 @@ selscroll(int orig, int n)
 		}
 	}
 }
+#endif // REFLOW_PATCH
 
 void
 tnewline(int first_col)
@@ -1377,7 +1456,9 @@ tnewline(int first_col)
 	int y = term.c.y;
 
 	if (y == term.bot) {
-		#if SCROLLBACK_PATCH
+		#if REFLOW_PATCH
+		tscrollup(term.top, term.bot, 1, SCROLL_SAVEHIST);
+		#elif SCROLLBACK_PATCH
 		tscrollup(term.top, 1, 1);
 		#else
 		tscrollup(term.top, 1);
@@ -1503,6 +1584,9 @@ 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 REFLOW_PATCH
+	term.line[y][x].mode |= ATTR_SET;
+	#endif // REFLOW_PATCH
 
 	#if BOXDRAW_PATCH
 	if (isboxdraw(u))
@@ -1510,6 +1594,7 @@ tsetchar(Rune u, const Glyph *attr, int x, int y)
 	#endif // BOXDRAW_PATCH
 }
 
+#if !REFLOW_PATCH
 void
 tclearregion(int x1, int y1, int x2, int y2)
 {
@@ -1544,7 +1629,9 @@ tclearregion(int x1, int y1, int x2, int y2)
 		}
 	}
 }
+#endif // REFLOW_PATCH
 
+#if !REFLOW_PATCH
 void
 tdeletechar(int n)
 {
@@ -1561,7 +1648,9 @@ tdeletechar(int n)
 	memmove(&line[dst], &line[src], size * sizeof(Glyph));
 	tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
 }
+#endif // REFLOW_PATCH
 
+#if !REFLOW_PATCH
 void
 tinsertblank(int n)
 {
@@ -1578,6 +1667,7 @@ tinsertblank(int n)
 	memmove(&line[dst], &line[src], size * sizeof(Glyph));
 	tclearregion(src, term.c.y, dst - 1, term.c.y);
 }
+#endif // REFLOW_PATCH
 
 void
 tinsertblankline(int n)
@@ -1602,12 +1692,15 @@ tdeleteimages(void)
 void
 tdeleteline(int n)
 {
-	if (BETWEEN(term.c.y, term.top, term.bot))
+	if (BETWEEN(term.c.y, term.top, term.bot)) {
-		#if SCROLLBACK_PATCH
+		#if REFLOW_PATCH
+		tscrollup(term.c.y, term.bot, n, SCROLL_NOSAVEHIST);
+		#elif SCROLLBACK_PATCH
 		tscrollup(term.c.y, n, 0);
 		#else
 		tscrollup(term.c.y, n);
 		#endif // SCROLLBACK_PATCH
+	}
 }
 
 int32_t
@@ -1906,6 +1999,13 @@ tsetmode(int priv, int set, const int *args, int narg)
 			case 1047:
 				if (!allowaltscreen)
 					break;
+				#if REFLOW_PATCH
+				if (set)
+					tloadaltscreen(*args != 47, *args == 1049);
+				else
+					tloaddefscreen(*args != 47, *args == 1049);
+				break;
+				#else
 				alt = IS_SET(MODE_ALTSCREEN);
 				if (alt) {
 					#if COLUMNS_PATCH
@@ -1919,7 +2019,12 @@ tsetmode(int priv, int set, const int *args, int narg)
 				if (*args != 1049)
 					break;
 				/* FALLTHROUGH */
+				#endif // REFLOW_PATCH
 			case 1048:
+				#if REFLOW_PATCH
+				if (!allowaltscreen)
+					break;
+				#endif // REFLOW_PATCH
 				tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
 				break;
 			case 2004: /* 2004: bracketed paste mode */
@@ -1979,11 +2084,14 @@ void
 csihandle(void)
 {
 	char buffer[40];
-	int len;
+	int n = 0, len;
 	#if SIXEL_PATCH
 	ImageList *im, *next;
-	int n, pi, pa;
+	int pi, pa;
 	#endif // SIXEL_PATCH
+	#if REFLOW_PATCH
+	int x;
+	#endif // REFLOW_PATCH
 	#if COLUMNS_PATCH
 	int maxcol = term.maxcol;
 	#else
@@ -2086,18 +2194,52 @@ csihandle(void)
 	case 'J': /* ED -- Clear screen */
 		switch (csiescseq.arg[0]) {
 		case 0: /* below */
+			#if REFLOW_PATCH
+			tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
+			if (term.c.y < term.row-1)
+				tclearregion(0, term.c.y+1, term.col-1, term.row-1, 1);
+			#else
 			tclearregion(term.c.x, term.c.y, maxcol-1, term.c.y);
-			if (term.c.y < term.row-1) {
+			if (term.c.y < term.row-1)
-				tclearregion(0, term.c.y+1, maxcol-1,
+				tclearregion(0, term.c.y+1, maxcol-1, term.row-1);
-						term.row-1);
+			#endif // REFLOW_PATCH
-			}
 			break;
 		case 1: /* above */
+			#if REFLOW_PATCH
+			if (term.c.y >= 1)
+				tclearregion(0, 0, term.col-1, term.c.y-1, 1);
+			tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
+			#else
 			if (term.c.y > 1)
 				tclearregion(0, 0, maxcol-1, term.c.y-1);
 			tclearregion(0, term.c.y, term.c.x, term.c.y);
+			#endif // REFLOW_PATCH
 			break;
 		case 2: /* screen */
+			#if REFLOW_PATCH
+			if (IS_SET(MODE_ALTSCREEN)) {
+				tclearregion(0, 0, term.col-1, term.row-1, 1);
+				#if SIXEL_PATCH
+				tdeleteimages();
+				#endif // SIXEL_PATCH
+				break;
+			}
+			/* vte does this:
+			tscrollup(0, term.row-1, term.row, SCROLL_SAVEHIST); */
+			/* alacritty does this: */
+			#if KEYBOARDSELECT_PATCH
+			for (n = term.row-1; n >= 0 && tlinelen(term.line[n]) == 0; n--)
+				;
+			#endif // KEYBOARDSELECT_PATCH
+			#if SIXEL_PATCH
+			for (im = term.images; im; im = im->next)
+				n = MAX(im->y - term.scr, n);
+			#endif // SIXEL_PATCH
+			if (n >= 0)
+				tscrollup(0, term.row-1, n+1, SCROLL_SAVEHIST);
+			tscrollup(0, term.row-1, term.row-n-1, SCROLL_NOSAVEHIST);
+			break;
+			#else // !REFLOW_PATCH
 			#if SCROLLBACK_PATCH
 			if (!IS_SET(MODE_ALTSCREEN)) {
 				#if SCROLLBACK_PATCH
@@ -2127,8 +2269,25 @@ csihandle(void)
 			#if SIXEL_PATCH
 			tdeleteimages();
 			#endif // SIXEL_PATCH
+			#endif // REFLOW_PTCH
 			break;
 		case 3: /* scrollback */
+			#if REFLOW_PATCH
+			if (IS_SET(MODE_ALTSCREEN))
+				break;
+			kscrolldown(&((Arg){ .i = term.scr }));
+			term.scr = 0;
+			term.histi = 0;
+			term.histf = 0;
+			#if SIXEL_PATCH
+			for (im = term.images; im; im = next) {
+				next = im->next;
+				if (im->y < 0)
+					delete_image(im);
+			}
+			#endif // SIXEL_PATCH
+			break;
+			#else // !REFLOW_PATCH
 			#if SCROLLBACK_PATCH
 			if (!IS_SET(MODE_ALTSCREEN)) {
 				term.scr = 0;
@@ -2149,6 +2308,7 @@ csihandle(void)
 			}
 			#endif // SIXEL_PATCH
 			break;
+			#endif // REFLOW_PATCH
 		#if SIXEL_PATCH
 		case 6: /* sixels */
 			tdeleteimages();
@@ -2161,9 +2321,20 @@ csihandle(void)
 		break;
 	case 'K': /* EL -- Clear line */
 		switch (csiescseq.arg[0]) {
+		#if REFLOW_PATCH
 		case 0: /* right */
-			tclearregion(term.c.x, term.c.y, maxcol-1,
+			tclearregion(term.c.x, term.c.y, term.col-1, term.c.y, 1);
-					term.c.y);
+			break;
+		case 1: /* left */
+			tclearregion(0, term.c.y, term.c.x, term.c.y, 1);
+			break;
+		case 2: /* all */
+			tclearregion(0, term.c.y, term.col-1, term.c.y, 1);
+			break;
+		}
+		#else
+		case 0: /* right */
+			tclearregion(term.c.x, term.c.y, maxcol-1, term.c.y);
 			break;
 		case 1: /* left */
 			tclearregion(0, term.c.y, term.c.x, term.c.y);
@@ -2172,6 +2343,7 @@ csihandle(void)
 			tclearregion(0, term.c.y, maxcol-1, term.c.y);
 			break;
 		}
+		#endif // REFLOW_PATCH
 		break;
 	case 'S': /* SU -- Scroll <n> line up ; XTSMGRAPHICS */
 		if (csiescseq.priv) {
@@ -2203,7 +2375,10 @@ csihandle(void)
 			goto unknown;
 		}
 		DEFAULT(csiescseq.arg[0], 1);
-		#if SIXEL_PATCH && SCROLLBACK_PATCH
+		#if REFLOW_PATCH
+		/* xterm, urxvt, alacritty save this in history */
+		tscrollup(term.top, term.bot, csiescseq.arg[0], SCROLL_SAVEHIST);
+		#elif SIXEL_PATCH && SCROLLBACK_PATCH
 		tscrollup(term.top, csiescseq.arg[0], 1);
 		#elif SCROLLBACK_PATCH
 		tscrollup(term.top, csiescseq.arg[0], 0);
@@ -2227,9 +2402,17 @@ csihandle(void)
 		tdeleteline(csiescseq.arg[0]);
 		break;
 	case 'X': /* ECH -- Erase <n> char */
+		#if REFLOW_PATCH
+		if (csiescseq.arg[0] < 0)
+			return;
+		DEFAULT(csiescseq.arg[0], 1);
+		x = MIN(term.c.x + csiescseq.arg[0], term.col) - 1;
+		tclearregion(term.c.x, term.c.y, x, term.c.y, 1);
+		#else
 		DEFAULT(csiescseq.arg[0], 1);
 		tclearregion(term.c.x, term.c.y,
 				term.c.x + csiescseq.arg[0] - 1, term.c.y);
+		#endif // REFLOW_PATCH
 		break;
 	case 'P': /* DCH -- Delete <n> char */
 		DEFAULT(csiescseq.arg[0], 1);
@@ -2411,7 +2594,7 @@ strhandle(void)
 	int i, x, y, x1, y1, x2, y2, numimages;
 	int cx, cy;
 	Line line;
-	#if SCROLLBACK_PATCH
+	#if SCROLLBACK_PATCH || REFLOW_PATCH
 	int scr = IS_SET(MODE_ALTSCREEN) ? 0 : term.scr;
 	#else
 	int scr = 0;
@@ -2551,7 +2734,7 @@ strhandle(void)
 			x2 = MIN(x2, term.col);
 			for (i = 0, im = newimages; im; im = next, i++) {
 				next = im->next;
-				#if SCROLLBACK_PATCH
+				#if SCROLLBACK_PATCH || REFLOW_PATCH
 				scr = IS_SET(MODE_ALTSCREEN) ? 0 : term.scr;
 				#endif // SCROLLBACK_PATCH
 				if (IS_SET(MODE_SIXEL_SDM)) {
@@ -2704,6 +2887,7 @@ tdumpsel(void)
 	}
 }
 
+#if !REFLOW_PATCH
 void
 tdumpline(int n)
 {
@@ -2718,6 +2902,7 @@ tdumpline(int n)
 	}
 	tprinter("\n", 1);
 }
+#endif // REFLOW_PATCH
 
 void
 tdump(void)
@@ -2994,7 +3179,9 @@ eschandle(uchar ascii)
 		return 0;
 	case 'D': /* IND -- Linefeed */
 		if (term.c.y == term.bot) {
-			#if SCROLLBACK_PATCH
+			#if REFLOW_PATCH
+			tscrollup(term.top, term.bot, 1, SCROLL_SAVEHIST);
+			#elif SCROLLBACK_PATCH
 			tscrollup(term.top, 1, 1);
 			#else
 			tscrollup(term.top, 1);
@@ -3027,7 +3214,7 @@ eschandle(uchar ascii)
 		resettitle();
 		xloadcols();
 		xsetmode(0, MODE_HIDE);
-		#if SCROLLBACK_PATCH
+		#if SCROLLBACK_PATCH && !REFLOW_PATCH
 		if (!IS_SET(MODE_ALTSCREEN)) {
 			term.scr = 0;
 			term.histi = 0;
@@ -3189,8 +3376,14 @@ check_control_code:
 		return;
 	}
 
+	#if REFLOW_PATCH
+	/* selected() takes relative coordinates */
+	if (selected(term.c.x + term.scr, term.c.y + term.scr))
+		selclear();
+	#else
 	if (selected(term.c.x, term.c.y))
 		selclear();
+	#endif // REFLOW_PATCH
 
 	gp = &term.line[term.c.y][term.c.x];
 	if (IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
@@ -3229,6 +3422,9 @@ check_control_code:
 	if (term.c.x+width < term.col) {
 		tmoveto(term.c.x+width, term.c.y);
 	} else {
+		#if REFLOW_PATCH
+		term.wrapcwidth[IS_SET(MODE_ALTSCREEN)] = width;
+		#endif // REFLOW_PATCH
 		term.c.state |= CURSOR_WRAPNEXT;
 	}
 }
@@ -3284,6 +3480,7 @@ twrite(const char *buf, int buflen, int show_ctrl)
 	return n;
 }
 
+#if !REFLOW_PATCH
 void
 tresize(int col, int row)
 {
@@ -3446,6 +3643,7 @@ tresize(int col, int row)
 	}
 	#endif // SIXEL_PATCH
 }
+#endif // REFLOW_PATCH
 
 void
 resettitle(void)
@@ -3467,7 +3665,7 @@ drawregion(int x1, int y1, int x2, int y2)
 			continue;
 
 		term.dirty[y] = 0;
-		#if SCROLLBACK_PATCH
+		#if SCROLLBACK_PATCH || REFLOW_PATCH
 		xdrawline(TLINE(y), x1, y, x2);
 		#else
 		xdrawline(term.line[y], x1, y, x2);
@@ -3495,6 +3693,10 @@ draw(void)
 
 	drawregion(0, 0, term.col, term.row);
 
+	#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+	if (!kbds_drawcursor()) {
+	#endif // KEYBOARDSELECT_PATCH
+
 	#if SCROLLBACK_PATCH
 	if (term.scr == 0)
 	#endif // SCROLLBACK_PATCH
@@ -3506,6 +3708,9 @@ draw(void)
 	xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
 			term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
 	#endif // LIGATURES_PATCH
+	#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+	}
+	#endif // KEYBOARDSELECT_PATCH
 	term.ocx = cx;
 	term.ocy = term.c.y;
 	xfinishdraw();

st.h

@@ -33,39 +33,43 @@
 
 #define TRUECOLOR(r,g,b)	(1 << 24 | (r) << 16 | (g) << 8 | (b))
 #define IS_TRUECOL(x)		(1 << 24 & (x))
-#if SCROLLBACK_PATCH
+#if SCROLLBACK_PATCH || REFLOW_PATCH
 #define HISTSIZE      2000
-#endif // SCROLLBACK_PATCH
+#endif // SCROLLBACK_PATCH | REFLOW_PATCH
 
 enum glyph_attribute {
-	ATTR_NULL       = 0,
+	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,
+	#if SELECTION_COLORS_PATCH
+	ATTR_SELECTED       = 1 << 12,
+	#endif // SELECTION_COLORS_PATCH | REFLOW_PATCH
 	#if BOXDRAW_PATCH
-	ATTR_BOXDRAW    = 1 << 11,
+	ATTR_BOXDRAW        = 1 << 13,
 	#endif // BOXDRAW_PATCH
+	#if UNDERCURL_PATCH
+	ATTR_DIRTYUNDERLINE = 1 << 14,
+	#endif // UNDERCURL_PATCH
 	#if LIGATURES_PATCH
-	ATTR_LIGA       = 1 << 12,
+	ATTR_LIGA           = 1 << 15,
 	#endif // LIGATURES_PATCH
 	#if SIXEL_PATCH
-	ATTR_SIXEL      = 1 << 13,
+	ATTR_SIXEL          = 1 << 16,
 	#endif // SIXEL_PATCH
+	#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+	ATTR_HIGHLIGHT      = 1 << 17,
+	#endif // KEYBOARDSELECT_PATCH
 	ATTR_BOLD_FAINT = ATTR_BOLD | ATTR_FAINT,
-	#if SELECTION_COLORS_PATCH
-	ATTR_SELECTED   = 1 << 14,
-	#endif // SELECTION_COLORS_PATCH
-	#if UNDERCURL_PATCH
-	ATTR_DIRTYUNDERLINE = 1 << 15,
-	#endif // UNDERCURL_PATCH
 };
 
 #if SIXEL_PATCH
@@ -77,6 +81,9 @@ typedef struct _ImageList {
 	int height;
 	int x;
 	int y;
+	#if REFLOW_PATCH
+	int reflow_y;
+	#endif // REFLOW_PATCH
 	int cols;
 	int cw;
 	int ch;
@@ -128,7 +135,7 @@ typedef XftGlyphFontSpec GlyphFontSpec;
 #define Glyph Glyph_
 typedef struct {
 	Rune u;           /* character code */
-	ushort mode;      /* attribute flags */
+	uint32_t mode;    /* attribute flags */
 	uint32_t fg;      /* foreground  */
 	uint32_t bg;      /* background  */
 	#if UNDERCURL_PATCH
@@ -164,12 +171,18 @@ typedef struct {
 	#endif // COLUMNS_PATCH
 	Line *line;   /* screen */
 	Line *alt;    /* alternate screen */
-	#if SCROLLBACK_PATCH
+	#if REFLOW_PATCH
+	Line hist[HISTSIZE]; /* history buffer */
+	int histi;           /* history index */
+	int histf;           /* nb history available */
+	int scr;             /* scroll back */
+	int wrapcwidth[2];   /* used in updating WRAPNEXT when resizing */
+	#elif SCROLLBACK_PATCH
 	Line hist[HISTSIZE]; /* history buffer */
 	int histi;    /* history index */
 	int histn;    /* number of history entries */
 	int scr;      /* scroll back */
-	#endif // SCROLLBACK_PATCH
+	#endif // SCROLLBACK_PATCH | REFLOW_PATCH
 	int *dirty;   /* dirtyness of lines */
 	TCursor c;    /* cursor */
 	int ocx;      /* old cursor col */
@@ -347,6 +360,7 @@ void resettitle(void);
 
 void selclear(void);
 void selinit(void);
+void selremove(void);
 void selstart(int, int, int);
 void selextend(int, int, int, int);
 int selected(int, int);
@@ -376,6 +390,10 @@ extern char *scroll;
 extern char *stty_args;
 extern char *vtiden;
 extern wchar_t *worddelimiters;
+#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+extern wchar_t *kbds_sdelim;
+extern wchar_t *kbds_ldelim;
+#endif // KEYBOARDSELECT_PATCH
 extern int allowaltscreen;
 extern int allowwindowops;
 extern char *termname;

win.h

@@ -52,4 +52,7 @@ void xsetpointermotion(int);
 void xsetsel(char *);
 int xstartdraw(void);
 void xximspot(int, int);
-void xclearwin(void);
+void xclearwin(void);
+#if REFLOW_PATCH && KEYBOARDSELECT_PATCH
+void xdrawglyph(Glyph, int, int);
+#endif // KEYBOARDSELECT_PATCH

x.c

@@ -90,7 +90,7 @@ static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
 #if LIGATURES_PATCH
 static inline void xresetfontsettings(uint32_t mode, Font **font, int *frcflags);
 #endif // LIGATURES_PATCH
-static void xdrawglyph(Glyph, int, int);
+void xdrawglyph(Glyph, int, int);
 static void xclear(int, int, int, int);
 static int xgeommasktogravity(int);
 static int ximopen(Display *);
@@ -259,6 +259,11 @@ clippaste(const Arg *dummy)
 {
 	Atom clipboard;
 
+	#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+	if (IS_SET(MODE_KBDSELECT) && !kbds_issearchmode())
+		return;
+	#endif // KEYBOARDSELECT_PATCH
+
 	clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
 	XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
 			xw.win, CurrentTime);
@@ -273,6 +278,11 @@ numlock(const Arg *dummy)
 void
 selpaste(const Arg *dummy)
 {
+	#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+	if (IS_SET(MODE_KBDSELECT) && !kbds_issearchmode())
+		return;
+	#endif // KEYBOARDSELECT_PATCH
+
 	XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
 			xw.win, CurrentTime);
 }
@@ -399,6 +409,11 @@ mousesel(XEvent *e, int done)
 	int type, seltype = SEL_REGULAR;
 	uint state = e->xbutton.state & ~(Button1Mask | forcemousemod);
 
+	#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+	if (kbds_isselectmode())
+		return;
+	#endif // KEYBOARDSELECT_PATCH
+
 	for (type = 1; type < LEN(selmasks); ++type) {
 		if (match(selmasks[type], state)) {
 			seltype = type;
@@ -517,6 +532,11 @@ bpress(XEvent *e)
 		xsel.tclick2 = xsel.tclick1;
 		xsel.tclick1 = now;
 
+		#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+		if (kbds_isselectmode())
+			return;
+		#endif // KEYBOARDSELECT_PATCH
+
 		selstart(evcol(e), evrow(e), snap);
 
 		#if OPENURLONCLICK_PATCH
@@ -555,6 +575,9 @@ selnotify(XEvent *e)
 	int format;
 	uchar *data, *last, *repl;
 	Atom type, incratom, property = None;
+	#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+	int append = 0;
+	#endif // KEYBOARDSELECT_PATCH
 
 	incratom = XInternAtom(xw.dpy, "INCR", 0);
 
@@ -616,6 +639,30 @@ selnotify(XEvent *e)
 			continue;
 		}
 
+		#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+		if (IS_SET(MODE_KBDSELECT) && kbds_issearchmode()) {
+			kbds_pasteintosearch(data, nitems * format / 8, append++);
+		} else {
+			/*
+			 * As seen in getsel:
+			 * Line endings are inconsistent in the terminal and GUI world
+			 * copy and pasting. When receiving some selection data,
+			 * replace all '\n' with '\r'.
+			 * FIXME: Fix the computer world.
+			 */
+			repl = data;
+			last = data + nitems * format / 8;
+			while ((repl = memchr(repl, '\n', last - repl))) {
+				*repl++ = '\r';
+			}
+
+			if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
+				ttywrite("\033[200~", 6, 0);
+			ttywrite((char *)data, nitems * format / 8, 1);
+			if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
+				ttywrite("\033[201~", 6, 0);
+		}
+		#else
 		/*
 		 * As seen in getsel:
 		 * Line endings are inconsistent in the terminal and GUI world
@@ -634,6 +681,7 @@ selnotify(XEvent *e)
 		ttywrite((char *)data, nitems * format / 8, 1);
 		if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
 			ttywrite("\033[201~", 6, 0);
+		#endif // KEYBOARDSELECT_PATCH
 		XFree(data);
 		/* number of 32-bit chunks returned */
 		ofs += nitems * format / 32;
@@ -854,11 +902,11 @@ xresize(int col, int row)
 	#if !SINGLE_DRAWABLE_BUFFER_PATCH
 	XFreePixmap(xw.dpy, xw.buf);
 	xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
-			#if ALPHA_PATCH
+		#if ALPHA_PATCH
-			xw.depth
+		xw.depth
-			#else
+		#else
-			DefaultDepth(xw.dpy, xw.scr)
+		DefaultDepth(xw.dpy, xw.scr)
-			#endif // ALPHA_PATCH
+		#endif // ALPHA_PATCH
 	);
 	XftDrawChange(xw.draw, xw.buf);
 	#endif // SINGLE_DRAWABLE_BUFFER_PATCH
@@ -2064,6 +2112,13 @@ xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, i
 	}
 	#endif // INVERT_PATCH
 
+	#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+	if (base.mode & ATTR_HIGHLIGHT) {
+		fg = &dc.col[(base.mode & ATTR_REVERSE) ? highlightbg : highlightfg];
+		bg = &dc.col[(base.mode & ATTR_REVERSE) ? highlightfg : highlightbg];
+	}
+	#endif // KEYBOARDSELECT_PATCH
+
 	#if ALPHA_PATCH && ALPHA_GRADIENT_PATCH
 	// gradient
 	bg->color.alpha = grad_alpha * 0xffff * (win.h - y*win.ch) / win.h + stat_alpha * 0xffff;
@@ -2614,6 +2669,9 @@ xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
 	#if DYNAMIC_CURSOR_COLOR_PATCH
 	|ATTR_REVERSE
 	#endif // DYNAMIC_CURSOR_COLOR_PATCH
+	#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+	|ATTR_HIGHLIGHT
+	#endif // KEYBOARDSELECT_PATCH
 	;
 
 	if (IS_SET(MODE_REVERSE)) {
@@ -2638,7 +2696,9 @@ xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
 		drawcol = dc.col[defaultcs];
 		#else
 		if (selected(cx, cy)) {
-			#if DYNAMIC_CURSOR_COLOR_PATCH
+			#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+			g.mode &= ~(ATTR_REVERSE | ATTR_HIGHLIGHT);
+			#elif DYNAMIC_CURSOR_COLOR_PATCH
 			g.mode &= ~ATTR_REVERSE;
 			#endif // DYNAMIC_CURSOR_COLOR_PATCH
 			g.fg = defaultfg;
@@ -2669,6 +2729,11 @@ xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
 		#endif // SELECTION_COLORS_PATCH
 	}
 
+	#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+	if (g.mode & ATTR_HIGHLIGHT)
+		g.mode ^= ATTR_REVERSE;
+	#endif // KEYBOARDSELECT_PATCH
+
 	/* draw the new one */
 	if (IS_SET(MODE_FOCUSED)) {
 		switch (win.cursor) {
@@ -2921,6 +2986,10 @@ xdrawline(Line line, int x1, int y1, int x2)
 		xdrawglyphfontspecs(specs, seq[i].base, seq[i].numspecs, seq[i].ox, y1, DRAW_FG, seq[i].charlen);
 		specs += seq[i].numspecs;
 	}
+
+	#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+	kbds_drawstatusbar(y1);
+	#endif // KEYBOARDSELECT_PATCH
 }
 #elif LIGATURES_PATCH
 void
@@ -2957,6 +3026,10 @@ xdrawline(Line line, int x1, int y1, int x2)
 		numspecs = xmakeglyphfontspecs(specs, &line[ox], x2 - ox, ox, y1);
 		xdrawglyphfontspecs(specs, base, numspecs, ox, y1, x2 - ox);
 	}
+
+	#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+	kbds_drawstatusbar(y1);
+	#endif // KEYBOARDSELECT_PATCH
 }
 #elif WIDE_GLYPHS_PATCH
 void
@@ -2999,6 +3072,10 @@ xdrawline(Line line, int x1, int y1, int x2)
 		if (i > 0)
 			xdrawglyphfontspecs(specs, base, i, ox, y1, dmode);
 	}
+
+	#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+	kbds_drawstatusbar(y1);
+	#endif // KEYBOARDSELECT_PATCH
 }
 #else // !WIDE_GLYPHS_PATCH and !LIGATURES_PATCH
 void
@@ -3035,6 +3112,10 @@ xdrawline(Line line, int x1, int y1, int x2)
 	}
 	if (i > 0)
 		xdrawglyphfontspecs(specs, base, i, ox, y1);
+
+	#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+	kbds_drawstatusbar(y1);
+	#endif // KEYBOARDSELECT_PATCH
 }
 #endif // WIDE_GLYPHS_PATCH | LIGATURES_PATCH
 
@@ -3130,11 +3211,11 @@ xfinishdraw(void)
 		width = MIN(width, (x2 - im->x) * win.cw);
 
 		/* delete the image if the text cells behind it have been changed */
-		#if SCROLLBACK_PATCH
+		#if SCROLLBACK_PATCH || REFLOW_PATCH
 		line = TLINE(im->y);
 		#else
 		line = term.line[im->y];
-		#endif // SCROLLBACK_PATCH
+		#endif // SCROLLBACK_PATCH | REFLOW_PATCH
 		for (del = 0, x = im->x; x < x2; x++) {
 			if ((del = !(line[x].mode & ATTR_SIXEL)))
 				break;
@@ -3431,7 +3512,25 @@ kpress(XEvent *ev)
 	} else {
 		len = XLookupString(e, buf, sizeof buf, &ksym, NULL);
 	}
-	#if KEYBOARDSELECT_PATCH
+
+	#if KEYBOARDSELECT_PATCH && REFLOW_PATCH
+	if (IS_SET(MODE_KBDSELECT) ) {
+		if (kbds_issearchmode()) {
+			for (bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
+				if (ksym == bp->keysym && match(bp->mod, e->state) &&
+						(!bp->screen || bp->screen == screen) &&
+						(bp->func == clippaste || bp->func == selpaste)) {
+					bp->func(&(bp->arg));
+					return;
+				}
+			}
+		}
+		if (match(XK_NO_MOD, e->state) ||
+			(XK_Shift_L | XK_Shift_R) & e->state )
+			win.mode ^= kbds_keyboardhandler(ksym, buf, len, 0);
+		return;
+	}
+	#elif KEYBOARDSELECT_PATCH
 	if ( IS_SET(MODE_KBDSELECT) ) {
 		if ( match(XK_NO_MOD, e->state) ||
 			(XK_Shift_L | XK_Shift_R) & e->state )