add uparrow and downarrow instead of pgup and pgdown

config.def.h.orig

@@ -192,6 +192,8 @@ static Shortcut shortcuts[] = {
 	{ TERMMOD,              XK_Y,           selpaste,       {.i =  0} },
 	{ ShiftMask,            XK_Insert,      selpaste,       {.i =  0} },
 	{ TERMMOD,              XK_Num_Lock,    numlock,        {.i =  0} },
+	{ ShiftMask,            XK_Page_Up,     kscrollup,      {.i = -1} },
+        { ShiftMask,            XK_Page_Down,   kscrolldown,    {.i = -1} },
 	{ MODKEY,               XK_l,           copyurl,        {.i =  0} },
 };
 

config.def.h.rej

@@ -1,11 +1,10 @@
 --- config.def.h
 +++ config.def.h
-@@ -199,6 +199,8 @@ static Shortcut shortcuts[] = {
+@@ -214,6 +229,7 @@ static Shortcut shortcuts[] = {
  	{ TERMMOD,              XK_Y,           selpaste,       {.i =  0} },
  	{ ShiftMask,            XK_Insert,      selpaste,       {.i =  0} },
  	{ TERMMOD,              XK_Num_Lock,    numlock,        {.i =  0} },
-+	{ ShiftMask,            XK_Page_Up,     kscrollup,      {.i = -1} },
++	{ MODKEY,               XK_c,           normalMode,     {.i =  0} },
-+	{ ShiftMask,            XK_Page_Down,   kscrolldown,    {.i = -1} },
  };
  
  /*

config.h

@@ -185,16 +185,16 @@ static Shortcut shortcuts[] = {
 	{ ControlMask,          XK_Print,       toggleprinter,  {.i =  0} },
 	{ ShiftMask,            XK_Print,       printscreen,    {.i =  0} },
 	{ XK_ANY_MOD,           XK_Print,       printsel,       {.i =  0} },
-	{ TERMMOD,              XK_Prior,       zoom,           {.f = +1} },
+	{ TERMMOD,              XK_KP_Add,      zoom,           {.f = +1} },
-	{ TERMMOD,              XK_Next,        zoom,           {.f = -1} },
+	{ TERMMOD,              XK_KP_Subtract, zoom,           {.f = -1} },
-	{ TERMMOD,              XK_Home,        zoomreset,      {.f =  0} },
+	{ TERMMOD,              XK_KP_Multiply, zoomreset,      {.f =  0} },
 	{ TERMMOD,              XK_C,           clipcopy,       {.i =  0} },
 	{ TERMMOD,              XK_V,           clippaste,      {.i =  0} },
 	{ TERMMOD,              XK_Y,           selpaste,       {.i =  0} },
 	{ ShiftMask,            XK_Insert,      selpaste,       {.i =  0} },
 	{ TERMMOD,              XK_Num_Lock,    numlock,        {.i =  0} },
-	{ ShiftMask,            XK_Page_Up,     kscrollup,      {.i = -1} },
+	{ ShiftMask,            XK_Up,     kscrollup,      {.i = -1} },
-        { ShiftMask,            XK_Page_Down,   kscrolldown,    {.i = -1} },
+        { ShiftMask,            XK_Down,   kscrolldown,    {.i = -1} },
 	{ MODKEY,               XK_l,           copyurl,        {.i =  0} },
 };
 

config.mk.orig

@@ -0,0 +1,35 @@
+# st version
+VERSION = 0.8.4
+
+# Customize below to fit your system
+
+# paths
+PREFIX = /usr/local
+MANPREFIX = $(PREFIX)/share/man
+
+X11INC = /usr/X11R6/include
+X11LIB = /usr/X11R6/lib
+
+PKG_CONFIG = pkg-config
+
+# includes and libs
+INCS = -I$(X11INC) \
+       `$(PKG_CONFIG) --cflags fontconfig` \
+       `$(PKG_CONFIG) --cflags freetype2`
+LIBS = -L$(X11LIB) -lm -lrt -lX11 -lutil -lXft \
+       `$(PKG_CONFIG) --libs fontconfig` \
+       `$(PKG_CONFIG) --libs freetype2`
+
+# flags
+STCPPFLAGS = -DVERSION=\"$(VERSION)\" -D_XOPEN_SOURCE=600
+STCFLAGS = $(INCS) $(STCPPFLAGS) $(CPPFLAGS) $(CFLAGS)
+STLDFLAGS = $(LIBS) $(LDFLAGS)
+
+# OpenBSD:
+#CPPFLAGS = -DVERSION=\"$(VERSION)\" -D_XOPEN_SOURCE=600 -D_BSD_SOURCE
+#LIBS = -L$(X11LIB) -lm -lX11 -lutil -lXft \
+#       `$(PKG_CONFIG) --libs fontconfig` \
+#       `$(PKG_CONFIG) --libs freetype2`
+
+# compiler and linker
+# CC = c99

config.mk.rej

@@ -0,0 +1,11 @@
+--- config.mk
++++ config.mk
+@@ -14,7 +14,7 @@ X11LIB = /usr/X11R6/lib
+ 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 -lXcursor \
+        `pkg-config --libs fontconfig` \
+        `pkg-config --libs freetype2`
+ 

st.c.orig

@@ -35,6 +35,7 @@
 #define ESC_ARG_SIZ   16
 #define STR_BUF_SIZ   ESC_BUF_SIZ
 #define STR_ARG_SIZ   ESC_ARG_SIZ
+#define HISTSIZE      2000
 
 /* macros */
 #define IS_SET(flag)		((term.mode & (flag)) != 0)
@@ -42,6 +43,9 @@
 #define ISCONTROLC1(c)		(BETWEEN(c, 0x80, 0x9f))
 #define ISCONTROL(c)		(ISCONTROLC0(c) || ISCONTROLC1(c))
 #define ISDELIM(u)		(u && wcschr(worddelimiters, u))
+#define TLINE(y)		((y) < term.scr ? term.hist[((y) + term.histi - \
+				term.scr + HISTSIZE + 1) % HISTSIZE] : \
+				term.line[(y) - term.scr])
 
 enum term_mode {
 	MODE_WRAP        = 1 << 0,
@@ -115,6 +119,9 @@ typedef struct {
 	int col;      /* nb col */
 	Line *line;   /* screen */
 	Line *alt;    /* alternate screen */
+	Line hist[HISTSIZE]; /* history buffer */
+	int histi;    /* history index */
+	int scr;      /* scroll back */
 	int *dirty;   /* dirtyness of lines */
 	TCursor c;    /* cursor */
 	int ocx;      /* old cursor col */
@@ -184,8 +191,8 @@ static void tnewline(int);
 static void tputtab(int);
 static void tputc(Rune);
 static void treset(void);
-static void tscrollup(int, int);
+static void tscrollup(int, int, int);
-static void tscrolldown(int, int);
+static void tscrolldown(int, int, int);
 static void tsetattr(int *, int);
 static void tsetchar(Rune, Glyph *, int, int);
 static void tsetdirt(int, int);
@@ -416,10 +423,10 @@ tlinelen(int y)
 {
 	int i = term.col;
 
-	if (term.line[y][i - 1].mode & ATTR_WRAP)
+	if (TLINE(y)[i - 1].mode & ATTR_WRAP)
 		return i;
 
-	while (i > 0 && term.line[y][i - 1].u == ' ')
+	while (i > 0 && TLINE(y)[i - 1].u == ' ')
 		--i;
 
 	return i;
@@ -528,7 +535,7 @@ selsnap(int *x, int *y, int direction)
 		 * Snap around if the word wraps around at the end or
 		 * beginning of a line.
 		 */
-		prevgp = &term.line[*y][*x];
+		prevgp = &TLINE(*y)[*x];
 		prevdelim = ISDELIM(prevgp->u);
 		for (;;) {
 			newx = *x + direction;
@@ -543,14 +550,14 @@ selsnap(int *x, int *y, int direction)
 					yt = *y, xt = *x;
 				else
 					yt = newy, xt = newx;
-				if (!(term.line[yt][xt].mode & ATTR_WRAP))
+				if (!(TLINE(yt)[xt].mode & ATTR_WRAP))
 					break;
 			}
 
 			if (newx >= tlinelen(newy))
 				break;
 
-			gp = &term.line[newy][newx];
+			gp = &TLINE(newy)[newx];
 			delim = ISDELIM(gp->u);
 			if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
 					|| (delim && gp->u != prevgp->u)))
@@ -571,14 +578,14 @@ selsnap(int *x, int *y, int direction)
 		*x = (direction < 0) ? 0 : term.col - 1;
 		if (direction < 0) {
 			for (; *y > 0; *y += direction) {
-				if (!(term.line[*y-1][term.col-1].mode
+				if (!(TLINE(*y-1)[term.col-1].mode
 						& ATTR_WRAP)) {
 					break;
 				}
 			}
 		} else if (direction > 0) {
 			for (; *y < term.row-1; *y += direction) {
-				if (!(term.line[*y][term.col-1].mode
+				if (!(TLINE(*y)[term.col-1].mode
 						& ATTR_WRAP)) {
 					break;
 				}
@@ -609,13 +616,13 @@ getsel(void)
 		}
 
 		if (sel.type == SEL_RECTANGULAR) {
-			gp = &term.line[y][sel.nb.x];
+			gp = &TLINE(y)[sel.nb.x];
 			lastx = sel.ne.x;
 		} else {
-			gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
+			gp = &TLINE(y)[sel.nb.y == y ? sel.nb.x : 0];
 			lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
 		}
-		last = &term.line[y][MIN(lastx, linelen-1)];
+		last = &TLINE(y)[MIN(lastx, linelen-1)];
 		while (last >= gp && last->u == ' ')
 			--last;
 
@@ -850,6 +857,9 @@ void
 ttywrite(const char *s, size_t n, int may_echo)
 {
 	const char *next;
+	Arg arg = (Arg) { .i = term.scr };
+
+	kscrolldown(&arg);
 
 	if (may_echo && IS_SET(MODE_ECHO))
 		twrite(s, n, 1);
@@ -1061,13 +1071,53 @@ tswapscreen(void)
 }
 
 void
-tscrolldown(int orig, int n)
+kscrolldown(const Arg* a)
+{
+	int n = a->i;
+
+	if (n < 0)
+		n = term.row + n;
+
+	if (n > term.scr)
+		n = term.scr;
+
+	if (term.scr > 0) {
+		term.scr -= n;
+		selscroll(0, -n);
+		tfulldirt();
+	}
+}
+
+void
+kscrollup(const Arg* a)
+{
+	int n = a->i;
+
+	if (n < 0)
+		n = term.row + n;
+
+	if (term.scr <= HISTSIZE-n) {
+		term.scr += n;
+		selscroll(0, n);
+		tfulldirt();
+	}
+}
+
+void
+tscrolldown(int orig, int n, int copyhist)
 {
 	int i;
 	Line temp;
 
 	LIMIT(n, 0, term.bot-orig+1);
 
+	if (copyhist) {
+		term.histi = (term.histi - 1 + HISTSIZE) % HISTSIZE;
+		temp = term.hist[term.histi];
+		term.hist[term.histi] = term.line[term.bot];
+		term.line[term.bot] = temp;
+	}
+
 	tsetdirt(orig, term.bot-n);
 	tclearregion(0, term.bot-n+1, term.col-1, term.bot);
 
@@ -1077,17 +1127,28 @@ tscrolldown(int orig, int n)
 		term.line[i-n] = temp;
 	}
 
-	selscroll(orig, n);
+	if (term.scr == 0)
+		selscroll(orig, n);
 }
 
 void
-tscrollup(int orig, int n)
+tscrollup(int orig, int n, int copyhist)
 {
 	int i;
 	Line temp;
 
 	LIMIT(n, 0, term.bot-orig+1);
 
+	if (copyhist) {
+		term.histi = (term.histi + 1) % HISTSIZE;
+		temp = term.hist[term.histi];
+		term.hist[term.histi] = term.line[orig];
+		term.line[orig] = temp;
+	}
+
+	if (term.scr > 0 && term.scr < HISTSIZE)
+		term.scr = MIN(term.scr + n, HISTSIZE-1);
+
 	tclearregion(0, orig, term.col-1, orig+n-1);
 	tsetdirt(orig+n, term.bot);
 
@@ -1097,7 +1158,8 @@ tscrollup(int orig, int n)
 		term.line[i+n] = temp;
 	}
 
-	selscroll(orig, -n);
+	if (term.scr == 0)
+		selscroll(orig, -n);
 }
 
 void
@@ -1126,7 +1188,7 @@ tnewline(int first_col)
 	int y = term.c.y;
 
 	if (y == term.bot) {
-		tscrollup(term.top, 1);
+		tscrollup(term.top, 1, 1);
 	} else {
 		y++;
 	}
@@ -1291,14 +1353,14 @@ void
 tinsertblankline(int n)
 {
 	if (BETWEEN(term.c.y, term.top, term.bot))
-		tscrolldown(term.c.y, n);
+		tscrolldown(term.c.y, n, 0);
 }
 
 void
 tdeleteline(int n)
 {
 	if (BETWEEN(term.c.y, term.top, term.bot))
-		tscrollup(term.c.y, n);
+		tscrollup(term.c.y, n, 0);
 }
 
 int32_t
@@ -1735,11 +1797,11 @@ csihandle(void)
 		break;
 	case 'S': /* SU -- Scroll <n> line up */
 		DEFAULT(csiescseq.arg[0], 1);
-		tscrollup(term.top, csiescseq.arg[0]);
+		tscrollup(term.top, csiescseq.arg[0], 0);
 		break;
 	case 'T': /* SD -- Scroll <n> line down */
 		DEFAULT(csiescseq.arg[0], 1);
-		tscrolldown(term.top, csiescseq.arg[0]);
+		tscrolldown(term.top, csiescseq.arg[0], 0);
 		break;
 	case 'L': /* IL -- Insert <n> blank lines */
 		DEFAULT(csiescseq.arg[0], 1);
@@ -2243,7 +2305,7 @@ eschandle(uchar ascii)
 		return 0;
 	case 'D': /* IND -- Linefeed */
 		if (term.c.y == term.bot) {
-			tscrollup(term.top, 1);
+			tscrollup(term.top, 1, 1);
 		} else {
 			tmoveto(term.c.x, term.c.y+1);
 		}
@@ -2256,7 +2318,7 @@ eschandle(uchar ascii)
 		break;
 	case 'M': /* RI -- Reverse index */
 		if (term.c.y == term.top) {
-			tscrolldown(term.top, 1);
+			tscrolldown(term.top, 1, 1);
 		} else {
 			tmoveto(term.c.x, term.c.y-1);
 		}
@@ -2466,7 +2528,7 @@ twrite(const char *buf, int buflen, int show_ctrl)
 void
 tresize(int col, int row)
 {
-	int i;
+	int i, j;
 	int minrow = MIN(row, term.row);
 	int mincol = MIN(col, term.col);
 	int *bp;
@@ -2503,6 +2565,14 @@ tresize(int col, int row)
 	term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
 	term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
 
+	for (i = 0; i < HISTSIZE; i++) {
+		term.hist[i] = xrealloc(term.hist[i], col * sizeof(Glyph));
+		for (j = mincol; j < col; j++) {
+			term.hist[i][j] = term.c.attr;
+			term.hist[i][j].u = ' ';
+		}
+	}
+
 	/* resize each row to new width, zero-pad if needed */
 	for (i = 0; i < minrow; i++) {
 		term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
@@ -2561,7 +2631,7 @@ drawregion(int x1, int y1, int x2, int y2)
 			continue;
 
 		term.dirty[y] = 0;
-		xdrawline(term.line[y], x1, y, x2);
+		xdrawline(TLINE(y), x1, y, x2);
 	}
 }
 
@@ -2582,8 +2652,9 @@ draw(void)
 		cx--;
 
 	drawregion(0, 0, term.col, term.row);
-	xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
+	if (term.scr == 0)
-			term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
+		xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
+				term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
 	term.ocx = cx;
 	term.ocy = term.c.y;
 	xfinishdraw();

st.c.rej

@@ -0,0 +1,262 @@
+--- st.c
++++ st.c
+@@ -43,6 +44,8 @@
+ #define ISCONTROLC1(c)		(BETWEEN(c, 0x80, 0x9f))
+ #define ISCONTROL(c)		(ISCONTROLC0(c) || ISCONTROLC1(c))
+ #define ISDELIM(u)		(u && wcschr(worddelimiters, u))
++static inline int max(int a, int b) { return a > b ? a : b; }
++static inline int min(int a, int b) { return a < b ? a : b; }
+ 
+ enum term_mode {
+ 	MODE_WRAP        = 1 << 0,
+@@ -585,119 +664,47 @@ selected(int x, int y)
+ 		return BETWEEN(y, sel.nb.y, sel.ne.y)
+ 		    && BETWEEN(x, sel.nb.x, sel.ne.x);
+ 
+-	return BETWEEN(y, sel.nb.y, sel.ne.y)
+-	    && (y != sel.nb.y || x >= sel.nb.x)
+-	    && (y != sel.ne.y || x <= sel.ne.x);
+-}
+-
+-void
+-selsnap(int *x, int *y, int direction)
+-{
+-	int newx, newy, xt, yt;
+-	int delim, prevdelim;
+-	Glyph *gp, *prevgp;
+-
+-	switch (sel.snap) {
+-	case SNAP_WORD:
+-		/*
+-		 * Snap around if the word wraps around at the end or
+-		 * beginning of a line.
+-		 */
+-		prevgp = &term.line[*y][*x];
+-		prevdelim = ISDELIM(prevgp->u);
+-		for (;;) {
+-			newx = *x + direction;
+-			newy = *y;
+-			if (!BETWEEN(newx, 0, term.col - 1)) {
+-				newy += direction;
+-				newx = (newx + term.col) % term.col;
+-				if (!BETWEEN(newy, 0, term.row - 1))
+-					break;
+-
+-				if (direction > 0)
+-					yt = *y, xt = *x;
+-				else
+-					yt = newy, xt = newx;
+-				if (!(term.line[yt][xt].mode & ATTR_WRAP))
+-					break;
+-			}
+-
+-			if (newx >= tlinelen(newy))
+-				break;
+-
+-			gp = &term.line[newy][newx];
+-			delim = ISDELIM(gp->u);
+-			if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
+-					|| (delim && gp->u != prevgp->u)))
+-				break;
+-
+-			*x = newx;
+-			*y = newy;
+-			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 > 0; *y += direction) {
+-				if (!(term.line[*y-1][term.col-1].mode
+-						& ATTR_WRAP)) {
+-					break;
+-				}
+-			}
+-		} else if (direction > 0) {
+-			for (; *y < term.row-1; *y += direction) {
+-				if (!(term.line[*y][term.col-1].mode
+-						& ATTR_WRAP)) {
+-					break;
+-				}
+-			}
+-		}
+-		break;
+-	}
++	return ((sel.nb.y > sel.ne.y) ? OUT(y, sel.nb.y, sel.ne.y)
++	                              : BETWEEN(y, sel.nb.y, sel.ne.y)) &&
++	       (y != sel.nb.y || x >= sel.nb.x) &&
++	       (y != sel.ne.y || x <= sel.ne.x);
+ }
+ 
+ char *
+ getsel(void)
+ {
+ 	char *str, *ptr;
+-	int y, bufsize, lastx, linelen;
++	int y, yy, bufsize, lastx;
+ 	Glyph *gp, *last;
+ 
+ 	if (sel.ob.x == -1)
+ 		return NULL;
+ 
+-	bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
++	int const start = sel.swap ? sel.oe.y : sel.ob.y, h = rows();
++	int endy = (sel.swap ? sel.ob.y : sel.oe.y);
++	for (; endy < start; endy += h);
++	Line * const cbuf = IS_SET(MODE_ALTSCREEN) ? term.line : buf;
++	bufsize = (term.col+1) * (endy-start+1 ) * UTF_SIZ;
++	assert(bufsize > 0);
+ 	ptr = str = xmalloc(bufsize);
+ 
+ 	/* append every set & selected glyph to the selection */
+-	for (y = sel.nb.y; y <= sel.ne.y; y++) {
+-		if ((linelen = tlinelen(y)) == 0) {
+-			*ptr++ = '\n';
+-			continue;
+-		}
++	for (y = start; y <= endy; y++) {
++		yy = y % h;
+ 
+ 		if (sel.type == SEL_RECTANGULAR) {
+-			gp = &term.line[y][sel.nb.x];
++			gp = &cbuf[yy][sel.nb.x];
+ 			lastx = sel.ne.x;
+ 		} else {
+-			gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
+-			lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
++			gp = &cbuf[yy][start == y ? sel.nb.x : 0];
++			lastx = (endy == y) ? sel.ne.x : term.col-1;
+ 		}
+-		last = &term.line[y][MIN(lastx, linelen-1)];
+-		while (last >= gp && last->u == ' ')
+-			--last;
++		last = &cbuf[yy][lastx];
++		if (!(cbuf[yy][term.col - 1].mode & ATTR_WRAP))
++			while (last > gp && last->u == ' ') --last;
+ 
+ 		for ( ; gp <= last; ++gp) {
+-			if (gp->mode & ATTR_WDUMMY)
+-				continue;
+-
++			if (gp->mode & ATTR_WDUMMY) continue;
+ 			ptr += utf8encode(gp->u, ptr);
+ 		}
+ 
+@@ -2541,8 +2547,10 @@ void
+ tresize(int col, int row)
+ {
+ 	int i;
+-	int minrow = MIN(row, term.row);
+-	int mincol = MIN(col, term.col);
++	int const colSet = col, alt = IS_SET(MODE_ALTSCREEN), ini = buf == NULL;
++	col = MAX(col, buffCols);
++	row = MIN(row, buffSize);
++	int const minrow = MIN(row, term.row), mincol = MIN(col, buffCols);
+ 	int *bp;
+ 	TCursor c;
+ 
+@@ -2559,48 +2568,54 @@ tresize(int col, int row)
+ 	 * memmove because we're freeing the earlier lines
+ 	 */
+ 	for (i = 0; i <= term.c.y - row; i++) {
+-		free(term.line[i]);
+ 		free(term.alt[i]);
+ 	}
+ 	/* ensure that both src and dst are not NULL */
+ 	if (i > 0) {
+-		memmove(term.line, term.line + i, row * sizeof(Line));
+ 		memmove(term.alt, term.alt + i, row * sizeof(Line));
+ 	}
+ 	for (i += row; i < term.row; i++) {
+-		free(term.line[i]);
+ 		free(term.alt[i]);
+ 	}
+ 
+ 	/* resize to new height */
+-	term.line = xrealloc(term.line, row * sizeof(Line));
++	buf = xrealloc(buf, (buffSize + row) * sizeof(Line));
+ 	term.alt  = xrealloc(term.alt,  row * sizeof(Line));
+ 	term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
++	mark = xrealloc(mark, col * row * sizeof(*mark));
+ 	term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
+ 
+ 	/* resize each row to new width, zero-pad if needed */
+ 	for (i = 0; i < minrow; i++) {
+-		term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
+ 		term.alt[i]  = xrealloc(term.alt[i],  col * sizeof(Glyph));
+ 	}
+ 
+ 	/* allocate any new rows */
+ 	for (/* i = minrow */; i < row; i++) {
+-		term.line[i] = xmalloc(col * sizeof(Glyph));
+ 		term.alt[i] = xmalloc(col * sizeof(Glyph));
+ 	}
+-	if (col > term.col) {
+-		bp = term.tabs + term.col;
++	if (col > buffCols) {
++		bp = term.tabs + buffCols;
+ 
+-		memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
++		memset(bp, 0, sizeof(*term.tabs) * (col - buffCols));
+ 		while (--bp > term.tabs && !*bp)
+ 			/* nothing */ ;
+ 		for (bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
+ 			*bp = 1;
+ 	}
++	Glyph g=(Glyph){.bg=term.c.attr.bg, .fg=term.c.attr.fg, .u=' ', .mode=0};
++	for (i = 0; i < buffSize; ++i) {
++		buf[i] = xrealloc(ini ? NULL : buf[i], col*sizeof(Glyph));
++		for (int j = ini ? 0 : buffCols; j < col; ++j) buf[i][j] = g;
++	}
++	for (i = 0; i < row; ++i) buf[buffSize + i] = buf[i];
++	term.line = &buf[*(histOp?&histOff:&insertOff) +=MAX(term.c.y-row+1,0)];
++	memset(mark, 0, col * row * sizeof(*mark));
+ 	/* update terminal size */
+-	term.col = col;
++	term.col = colSet;
++	buffCols = col;
+ 	term.row = row;
++	if (alt) tswapscreen();
+ 	/* reset scrolling region */
+ 	tsetscroll(0, row-1);
+ 	/* make use of the LIMIT in tmoveto */
+@@ -2629,15 +2644,17 @@ resettitle(void)
+ void
+ drawregion(int x1, int y1, int x2, int y2)
+ {
++	if (altToggle && histMode && !histOp)
++		memset(term.dirty, 0, sizeof(*term.dirty) * term.row);
++	int const o = !IS_SET(MODE_ALTSCREEN) && histMode && !histOp, h =rows();
+ 	int y;
+ 
+ 	for (y = y1; y < y2; y++) {
+-		if (!term.dirty[y])
+-			continue;
+-
+-		term.dirty[y] = 0;
+-		xdrawline(term.line[y], x1, y, x2);
++		int const oy = o ? (y + insertOff - histOff + h) % h : y;
++		if (!BETWEEN(oy, 0, term.row-1) || !term.dirty[y]) continue;
++		xdrawline(term.line[y], x1, oy, x2);
+ 	}
++	memset(&term.dirty[y1], 0, sizeof(*term.dirty) * (y2 - y1));
+ }
+ 
+ void
+@@ -2656,7 +2673,9 @@ draw(void)
+ 	if (term.line[term.c.y][cx].mode & ATTR_WDUMMY)
+ 		cx--;
+ 
++	if (histMode) historyPreDraw();
+ 	drawregion(0, 0, term.col, term.row);
++	if (!histMode)
+ 	xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
+ 			term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
+ 	term.ocx = cx;

utils.h

@@ -0,0 +1,23 @@
+/// Dynamic memory-chunk, with (1) datatype size, (2/3) initialized / allocated chunk, (4) content
+typedef struct { uint8_t const elSize; uint32_t init, alloc; char* content; } DynamicArray;
+#define UTF8_ARRAY {4, 0, 0, NULL}
+
+static inline int p_alloc(DynamicArray *s, uint32_t amount) {
+	uint32_t const diff=s->init+s->elSize*amount-s->alloc, nas=s->alloc+max(diff,15)*s->elSize;
+	if (s->alloc < s->init + s->elSize * amount) {
+		char* tmp = realloc(s->content, nas);
+		if (!tmp) return 0;
+		s->alloc = nas, s->content = tmp;
+	}
+	return 1;
+}
+static inline char *view(DynamicArray * s, uint32_t i) { return s->content + i*s->elSize; }
+static inline char *end(DynamicArray *s, uint32_t i) { return s->content +s->init-(i+1)*s->elSize; }
+static inline uint32_t getU32(DynamicArray* s, uint32_t i, int b) { return *((uint32_t*) (b ?view(s,i) :end(s,i))); }
+static char *expand(DynamicArray *s) { if (!p_alloc(s, 1)) return NULL; s->init += s->elSize; return end(s, 0); }
+static inline void pop(DynamicArray* s) { s->init -= s->elSize; }
+static inline void empty(DynamicArray* s) { s->init = 0; }
+static inline int size(DynamicArray const * s) { return s->init / s->elSize; }
+static inline void assign(DynamicArray* s, DynamicArray const *o) { 
+	if (p_alloc(s, size(o))) memcpy(s->content, o->content, (s->init=o->init));
+}

win.h

@@ -19,6 +19,7 @@ enum win_mode {
 	MODE_MOUSEMANY   = 1 << 15,
 	MODE_BRCKTPASTE  = 1 << 16,
 	MODE_NUMLOCK     = 1 << 17,
+	MODE_NORMAL      = 1 << 18,
 	MODE_MOUSE       = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
 	                  |MODE_MOUSEMANY,
 };