~petersanchez/st

5166b2712652fb8be782e8fa8a615c8032c2169a — Peter Sanchez 1 year, 8 months ago 47932ea
Adding st-scrollback patch
5 files changed, 468 insertions(+), 27 deletions(-)

M config.h
M patches/README.md
A patches/st-scrollback-20200419-72e3f6c.diff
M st.c
M st.h
M config.h => config.h +10 -0
@@ 205,6 205,16 @@ static Shortcut shortcuts[] = {
	{ ShiftMask,            XK_Insert,      selpaste,       {.i =  0} },
	{ TERMMOD,              XK_Num_Lock,    numlock,        {.i =  0} },
	/* { TERMMOD,              XK_I,           iso14755,       {.i =  0} }, */
        { ShiftMask,            XK_Page_Up,     kscrollup,      {.i = -1} },
        { ShiftMask,            XK_Page_Down,   kscrolldown,    {.i = -1} },
        { MODKEY,               XK_Page_Up,     kscrollup,      {.i = -1} },
        { MODKEY,               XK_Page_Down,   kscrolldown,    {.i = -1} },
        { MODKEY,               XK_k,           kscrollup,      {.i =  1} },
        { MODKEY,               XK_j,           kscrolldown,    {.i =  1} },
        { MODKEY,               XK_Up,          kscrollup,      {.i =  1} },
        { MODKEY,               XK_Down,        kscrolldown,    {.i =  1} },
        { MODKEY,               XK_u,           kscrollup,      {.i = -1} },
        { MODKEY,               XK_d,           kscrolldown,    {.i = -1} },
	{ MODKEY,               XK_l,           copyurl,        {.i =  0} },
	{ TERMMOD,              XK_K,           zoom,           {.f = +1} },
	{ TERMMOD,              XK_J,           zoom,           {.f = -1} },

M patches/README.md => patches/README.md +7 -0
@@ 3,3 3,10 @@
1. http://st.suckless.org/patches/copyurl/st-copyurl-20190202-0.8.1.diff
1. http://st.suckless.org/patches/alpha/st-alpha-0.8.2.diff
1. http://st.suckless.org/patches/clipboard/st-clipboard-0.8.3.diff
1. https://st.suckless.org/patches/scrollback/st-scrollback-20200419-72e3f6c.diff

## Notes

- The `st-scrollback` patch was modified to remove the editing of
  `config.def.h`. It didn't apply cleanly and it it isn't needed in my case. I
  just adjusted my `config.h` manually.

A patches/st-scrollback-20200419-72e3f6c.diff => patches/st-scrollback-20200419-72e3f6c.diff +351 -0
@@ 0,0 1,351 @@
diff --git a/config.def.h b/config.def.h
index 0895a1f..eef24df 100644
--- a/config.def.h
+++ b/config.def.h
@@ -188,6 +188,8 @@ 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} },
 };
 
 /*
diff --git a/st.c b/st.c
index 0ce6ac2..641edc0 100644
--- a/st.c
+++ b/st.c
@@ -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,
@@ -117,6 +121,9 @@ 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 */
@@ -185,8 +192,8 @@ static void tnewline(int);
 static void tputtab(int);
 static void tputc(Rune);
 static void treset(void);
-static void tscrollup(int, int);
-static void tscrolldown(int, int);
+static void tscrollup(int, 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);
@@ -415,10 +422,10 @@ 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;
@@ -527,7 +534,7 @@ 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;
@@ -542,14 +549,14 @@ 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)))
@@ -570,14 +577,14 @@ 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;
 				}
@@ -608,13 +615,13 @@ 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;
 
@@ -849,6 +856,9 @@ 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);
@@ -1060,13 +1070,53 @@ 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);
 
@@ -1076,17 +1126,28 @@ 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);
 
@@ -1096,7 +1157,8 @@ tscrollup(int orig, int n)
 		term.line[i+n] = temp;
 	}
 
-	selscroll(orig, -n);
+	if (term.scr == 0)
+		selscroll(orig, -n);
 }
 
 void
@@ -1135,7 +1197,7 @@ tnewline(int first_col)
 	int y = term.c.y;
 
 	if (y == term.bot) {
-		tscrollup(term.top, 1);
+		tscrollup(term.top, 1, 1);
 	} else {
 		y++;
 	}
@@ -1300,14 +1362,14 @@ 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
@@ -1738,11 +1800,11 @@ 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);
@@ -2248,7 +2310,7 @@ 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);
 		}
@@ -2261,7 +2323,7 @@ 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);
 		}
@@ -2482,7 +2544,7 @@ 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;
@@ -2519,6 +2581,14 @@ 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));
@@ -2577,7 +2647,7 @@ 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);
 	}
 }
 
@@ -2598,8 +2668,9 @@ draw(void)
 		cx--;
 
 	drawregion(0, 0, term.col, term.row);
-	xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
-			term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
+	if (term.scr == 0)
+		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();
diff --git a/st.h b/st.h
index d978458..b9a4eeb 100644
--- a/st.h
+++ b/st.h
@@ -81,6 +81,8 @@ void die(const char *, ...);
 void redraw(void);
 void draw(void);
 
+void kscrolldown(const Arg *);
+void kscrollup(const Arg *);
 void printscreen(const Arg *);
 void printsel(const Arg *);
 void sendbreak(const Arg *);

M st.c => st.c +98 -27
@@ 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 tscrolldown(int, int);
static void tscrollup(int, 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);


@@ 414,10 421,10 @@ 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;


@@ 526,7 533,7 @@ 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;


@@ 541,14 548,14 @@ 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)))


@@ 569,14 576,14 @@ 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;
				}


@@ 607,13 614,13 @@ 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;



@@ 848,6 855,9 @@ 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);


@@ 1059,13 1069,53 @@ 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);



@@ 1075,17 1125,28 @@ 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);



@@ 1095,7 1156,8 @@ tscrollup(int orig, int n)
		term.line[i+n] = temp;
	}

	selscroll(orig, -n);
	if (term.scr == 0)
		selscroll(orig, -n);
}

void


@@ 1124,7 1186,7 @@ tnewline(int first_col)
	int y = term.c.y;

	if (y == term.bot) {
		tscrollup(term.top, 1);
		tscrollup(term.top, 1, 1);
	} else {
		y++;
	}


@@ 1289,14 1351,14 @@ 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


@@ 1733,11 1795,11 @@ 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);


@@ 2249,7 2311,7 @@ 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);
		}


@@ 2262,7 2324,7 @@ 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);
		}


@@ 2472,7 2534,7 @@ 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;


@@ 2509,6 2571,14 @@ 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));


@@ 2567,7 2637,7 @@ 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);
	}
}



@@ 2588,8 2658,9 @@ draw(void)
		cx--;

	drawregion(0, 0, term.col, term.row);
	xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
			term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
	if (term.scr == 0)
		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();

M st.h => st.h +2 -0
@@ 81,6 81,8 @@ void die(const char *, ...);
void redraw(void);
void draw(void);

void kscrolldown(const Arg *);
void kscrollup(const Arg *);
void printscreen(const Arg *);
void printsel(const Arg *);
void sendbreak(const Arg *);