Added Scrollback Patch

config.def.h

@@ -93,87 +93,46 @@ char *termname = "st-256color";
  */
 unsigned int tabspaces = 8;
 
-typedef struct {
-	const char* const colors[258]; /* terminal colors */
-	unsigned int fg;               /* foreground */
-	unsigned int bg;               /* background */
-	unsigned int cs;               /* cursor */
-	unsigned int rcs;              /* reverse cursor */
-} ColorScheme;
-/*
- * Terminal colors (16 first used in escape sequence,
- * 2 last for custom cursor color),
- * foreground, background, cursor, reverse cursor
- */
-static const ColorScheme schemes[] = {
-	// st (dark)
-	{{"black", "red3", "green3", "yellow3",
-	  "blue2", "magenta3", "cyan3", "gray90",
-	  "gray50", "red", "green", "yellow",
-	  "#5c5cff", "magenta", "cyan", "white",
-	  [256]="#cccccc", "#555555"}, 7, 0, 256, 257},
+/* Terminal colors (16 first used in escape sequence) */
+static const char *colorname[] = {
+	/* 8 normal colors */
+	"black",
+	"red3",
+	"green3",
+	"yellow3",
+	"blue2",
+	"magenta3",
+	"cyan3",
+	"gray90",
 
-	// Alacritty (dark)
-	{{"#1d1f21", "#cc6666", "#b5bd68", "#f0c674",
-	  "#81a2be", "#b294bb", "#8abeb7", "#c5c8c6",
-	  "#666666", "#d54e53", "#b9ca4a", "#e7c547",
-	  "#7aa6da", "#c397d8", "#70c0b1", "#eaeaea",
-	  [256]="#cccccc", "#555555"}, 7, 0, 256, 257},
+	/* 8 bright colors */
+	"gray50",
+	"red",
+	"green",
+	"yellow",
+	"#5c5cff",
+	"magenta",
+	"cyan",
+	"white",
 
-	// One Half dark
-	{{"#282c34", "#e06c75", "#98c379", "#e5c07b",
-	  "#61afef", "#c678dd", "#56b6c2", "#dcdfe4",
-	  "#282c34", "#e06c75", "#98c379", "#e5c07b",
-	  "#61afef", "#c678dd", "#56b6c2", "#dcdfe4",
-	  [256]="#cccccc", "#555555"}, 7, 0, 256, 257},
+	[255] = 0,
 
-	// One Half light
-	{{"#fafafa", "#e45649", "#50a14f", "#c18401",
-      "#0184bc", "#a626a4", "#0997b3", "#383a42",
-	  "#fafafa", "#e45649", "#50a14f", "#c18401",
-	  "#0184bc", "#a626a4", "#0997b3", "#383a42",
-	  [256]="#cccccc", "#555555"}, 7, 0, 256, 257},
-
-	// Solarized dark
-	{{"#073642", "#dc322f", "#859900", "#b58900",
-	  "#268bd2", "#d33682", "#2aa198", "#eee8d5",
-	  "#002b36", "#cb4b16", "#586e75", "#657b83",
-	  "#839496", "#6c71c4", "#93a1a1", "#fdf6e3",
-	  [256]="#93a1a1", "#fdf6e3"}, 12, 8, 256, 257},
-
-	// Solarized light
-	{{"#eee8d5", "#dc322f", "#859900", "#b58900",
-	  "#268bd2", "#d33682", "#2aa198", "#073642",
-	  "#fdf6e3", "#cb4b16", "#93a1a1", "#839496",
-	  "#657b83", "#6c71c4", "#586e75", "#002b36",
-	  [256]="#586e75", "#002b36"}, 12, 8, 256, 257},
-
-	// Gruvbox dark
-	{{"#282828", "#cc241d", "#98971a", "#d79921",
-	  "#458588", "#b16286", "#689d6a", "#a89984",
-	  "#928374", "#fb4934", "#b8bb26", "#fabd2f",
-	  "#83a598", "#d3869b", "#8ec07c", "#ebdbb2",
-	  [256]="#ebdbb2", "#555555"}, 15, 0, 256, 257},
-
-	// Gruvbox light
-	{{"#fbf1c7", "#cc241d", "#98971a", "#d79921",
-	  "#458588", "#b16286", "#689d6a", "#7c6f64",
-	  "#928374", "#9d0006", "#79740e", "#b57614",
-	  "#076678", "#8f3f71", "#427b58", "#3c3836",
-	  [256]="#3c3836", "#555555"}, 15, 0, 256, 257},
+	/* more colors can be added after 255 to use with DefaultXX */
+	"#cccccc",
+	"#555555",
+	"gray90", /* default foreground colour */
+	"black", /* default background colour */
 };
 
-static const char * const * colorname;
-int colorscheme = 0;
 
 /*
  * Default colors (colorname index)
  * foreground, background, cursor, reverse cursor
  */
-unsigned int defaultfg;
-unsigned int defaultbg;
-unsigned int defaultcs;
-static unsigned int defaultrcs;
+unsigned int defaultfg = 258;
+unsigned int defaultbg = 259;
+unsigned int defaultcs = 256;
+static unsigned int defaultrcs = 257;
 
 /*
  * Default shape of cursor
@@ -242,17 +201,8 @@ static Shortcut shortcuts[] = {
 	{ TERMMOD,              XK_Y,           selpaste,       {.i =  0} },
 	{ ShiftMask,            XK_Insert,      selpaste,       {.i =  0} },
 	{ TERMMOD,              XK_Num_Lock,    numlock,        {.i =  0} },
-	{ MODKEY,               XK_1,           selectscheme,   {.i =  0} },
-	{ MODKEY,               XK_2,           selectscheme,   {.i =  1} },
-	{ MODKEY,               XK_3,           selectscheme,   {.i =  2} },
-	{ MODKEY,               XK_4,           selectscheme,   {.i =  3} },
-	{ MODKEY,               XK_5,           selectscheme,   {.i =  4} },
-	{ MODKEY,               XK_6,           selectscheme,   {.i =  5} },
-	{ MODKEY,               XK_7,           selectscheme,   {.i =  6} },
-	{ MODKEY,               XK_8,           selectscheme,   {.i =  7} },
-	{ MODKEY,               XK_9,           selectscheme,   {.i =  8} },
-	{ MODKEY,               XK_0,           nextscheme,     {.i = +1} },
-	{ MODKEY|ControlMask,   XK_0,           nextscheme,     {.i = -1} },
+	{ ShiftMask,            XK_Page_Up,     kscrollup,      {.i = -1} },
+	{ ShiftMask,            XK_Page_Down,   kscrolldown,    {.i = -1} },
 };
 
 /*

st-colorschemes-0.8.5.diff

@@ -1,306 +0,0 @@
-From 9bfbafa1e98c13c039bea4790941e51b3a8054b4 Mon Sep 17 00:00:00 2001
-From: Max Schillinger <maxschillinger@web.de>
-Date: Thu, 23 Jun 2022 21:58:37 +0200
-Subject: [PATCH] Add multiple color schemes and key bindings to change them
-
-This commits adds these color schemes:
-
-- the default (dark) st color scheme
-- the default (dark) alacritty color scheme
-- One Half (dark & light)
-- Solarized (dark & light)
-- Gruvbox (dark & light)
-
-Select one with Alt+1..8.
-Select the next one with Alt+0.
-Select the previous one with Ctrl+Alt+0.
----
- config.def.h | 118 +++++++++++++++++++++++++++++++++++++--------------
- st.c         |  22 ++++++++++
- st.h         |   2 +
- x.c          |  52 ++++++++++++++++++++++-
- 4 files changed, 160 insertions(+), 34 deletions(-)
-
-diff --git a/config.def.h b/config.def.h
-index 91ab8ca..38777fe 100644
---- a/config.def.h
-+++ b/config.def.h
-@@ -93,46 +93,87 @@ char *termname = "st-256color";
-  */
- unsigned int tabspaces = 8;
- 
--/* Terminal colors (16 first used in escape sequence) */
--static const char *colorname[] = {
--	/* 8 normal colors */
--	"black",
--	"red3",
--	"green3",
--	"yellow3",
--	"blue2",
--	"magenta3",
--	"cyan3",
--	"gray90",
--
--	/* 8 bright colors */
--	"gray50",
--	"red",
--	"green",
--	"yellow",
--	"#5c5cff",
--	"magenta",
--	"cyan",
--	"white",
--
--	[255] = 0,
--
--	/* more colors can be added after 255 to use with DefaultXX */
--	"#cccccc",
--	"#555555",
--	"gray90", /* default foreground colour */
--	"black", /* default background colour */
-+typedef struct {
-+	const char* const colors[258]; /* terminal colors */
-+	unsigned int fg;               /* foreground */
-+	unsigned int bg;               /* background */
-+	unsigned int cs;               /* cursor */
-+	unsigned int rcs;              /* reverse cursor */
-+} ColorScheme;
-+/*
-+ * Terminal colors (16 first used in escape sequence,
-+ * 2 last for custom cursor color),
-+ * foreground, background, cursor, reverse cursor
-+ */
-+static const ColorScheme schemes[] = {
-+	// st (dark)
-+	{{"black", "red3", "green3", "yellow3",
-+	  "blue2", "magenta3", "cyan3", "gray90",
-+	  "gray50", "red", "green", "yellow",
-+	  "#5c5cff", "magenta", "cyan", "white",
-+	  [256]="#cccccc", "#555555"}, 7, 0, 256, 257},
-+
-+	// Alacritty (dark)
-+	{{"#1d1f21", "#cc6666", "#b5bd68", "#f0c674",
-+	  "#81a2be", "#b294bb", "#8abeb7", "#c5c8c6",
-+	  "#666666", "#d54e53", "#b9ca4a", "#e7c547",
-+	  "#7aa6da", "#c397d8", "#70c0b1", "#eaeaea",
-+	  [256]="#cccccc", "#555555"}, 7, 0, 256, 257},
-+
-+	// One Half dark
-+	{{"#282c34", "#e06c75", "#98c379", "#e5c07b",
-+	  "#61afef", "#c678dd", "#56b6c2", "#dcdfe4",
-+	  "#282c34", "#e06c75", "#98c379", "#e5c07b",
-+	  "#61afef", "#c678dd", "#56b6c2", "#dcdfe4",
-+	  [256]="#cccccc", "#555555"}, 7, 0, 256, 257},
-+
-+	// One Half light
-+	{{"#fafafa", "#e45649", "#50a14f", "#c18401",
-+      "#0184bc", "#a626a4", "#0997b3", "#383a42",
-+	  "#fafafa", "#e45649", "#50a14f", "#c18401",
-+	  "#0184bc", "#a626a4", "#0997b3", "#383a42",
-+	  [256]="#cccccc", "#555555"}, 7, 0, 256, 257},
-+
-+	// Solarized dark
-+	{{"#073642", "#dc322f", "#859900", "#b58900",
-+	  "#268bd2", "#d33682", "#2aa198", "#eee8d5",
-+	  "#002b36", "#cb4b16", "#586e75", "#657b83",
-+	  "#839496", "#6c71c4", "#93a1a1", "#fdf6e3",
-+	  [256]="#93a1a1", "#fdf6e3"}, 12, 8, 256, 257},
-+
-+	// Solarized light
-+	{{"#eee8d5", "#dc322f", "#859900", "#b58900",
-+	  "#268bd2", "#d33682", "#2aa198", "#073642",
-+	  "#fdf6e3", "#cb4b16", "#93a1a1", "#839496",
-+	  "#657b83", "#6c71c4", "#586e75", "#002b36",
-+	  [256]="#586e75", "#002b36"}, 12, 8, 256, 257},
-+
-+	// Gruvbox dark
-+	{{"#282828", "#cc241d", "#98971a", "#d79921",
-+	  "#458588", "#b16286", "#689d6a", "#a89984",
-+	  "#928374", "#fb4934", "#b8bb26", "#fabd2f",
-+	  "#83a598", "#d3869b", "#8ec07c", "#ebdbb2",
-+	  [256]="#ebdbb2", "#555555"}, 15, 0, 256, 257},
-+
-+	// Gruvbox light
-+	{{"#fbf1c7", "#cc241d", "#98971a", "#d79921",
-+	  "#458588", "#b16286", "#689d6a", "#7c6f64",
-+	  "#928374", "#9d0006", "#79740e", "#b57614",
-+	  "#076678", "#8f3f71", "#427b58", "#3c3836",
-+	  [256]="#3c3836", "#555555"}, 15, 0, 256, 257},
- };
- 
-+static const char * const * colorname;
-+int colorscheme = 0;
- 
- /*
-  * Default colors (colorname index)
-  * foreground, background, cursor, reverse cursor
-  */
--unsigned int defaultfg = 258;
--unsigned int defaultbg = 259;
--unsigned int defaultcs = 256;
--static unsigned int defaultrcs = 257;
-+unsigned int defaultfg;
-+unsigned int defaultbg;
-+unsigned int defaultcs;
-+static unsigned int defaultrcs;
- 
- /*
-  * Default shape of cursor
-@@ -201,6 +242,17 @@ static Shortcut shortcuts[] = {
- 	{ TERMMOD,              XK_Y,           selpaste,       {.i =  0} },
- 	{ ShiftMask,            XK_Insert,      selpaste,       {.i =  0} },
- 	{ TERMMOD,              XK_Num_Lock,    numlock,        {.i =  0} },
-+	{ MODKEY,               XK_1,           selectscheme,   {.i =  0} },
-+	{ MODKEY,               XK_2,           selectscheme,   {.i =  1} },
-+	{ MODKEY,               XK_3,           selectscheme,   {.i =  2} },
-+	{ MODKEY,               XK_4,           selectscheme,   {.i =  3} },
-+	{ MODKEY,               XK_5,           selectscheme,   {.i =  4} },
-+	{ MODKEY,               XK_6,           selectscheme,   {.i =  5} },
-+	{ MODKEY,               XK_7,           selectscheme,   {.i =  6} },
-+	{ MODKEY,               XK_8,           selectscheme,   {.i =  7} },
-+	{ MODKEY,               XK_9,           selectscheme,   {.i =  8} },
-+	{ MODKEY,               XK_0,           nextscheme,     {.i = +1} },
-+	{ MODKEY|ControlMask,   XK_0,           nextscheme,     {.i = -1} },
- };
- 
- /*
-diff --git a/st.c b/st.c
-index 51049ba..3ffe333 100644
---- a/st.c
-+++ b/st.c
-@@ -2196,6 +2196,28 @@ tstrsequence(uchar c)
- 	term.esc |= ESC_STR;
- }
- 
-+void
-+tupdatebgcolor(int oldbg, int newbg)
-+{
-+	for (int y = 0; y < term.row; y++) {
-+		for (int x = 0; x < term.col; x++) {
-+			if (term.line[y][x].bg == oldbg)
-+				term.line[y][x].bg = newbg;
-+		}
-+	}
-+}
-+
-+void
-+tupdatefgcolor(int oldfg, int newfg)
-+{
-+	for (int y = 0; y < term.row; y++) {
-+		for (int x = 0; x < term.col; x++) {
-+			if (term.line[y][x].fg == oldfg)
-+				term.line[y][x].fg = newfg;
-+		}
-+	}
-+}
-+
- void
- tcontrolcode(uchar ascii)
- {
-diff --git a/st.h b/st.h
-index 519b9bd..2700de5 100644
---- a/st.h
-+++ b/st.h
-@@ -90,6 +90,8 @@ int tattrset(int);
- void tnew(int, int);
- void tresize(int, int);
- void tsetdirtattr(int);
-+void tupdatebgcolor(int, int);
-+void tupdatefgcolor(int, int);
- void ttyhangup(void);
- int ttynew(const char *, char *, const char *, char **);
- size_t ttyread(void);
-diff --git a/x.c b/x.c
-index 8a16faa..bc0a48c 100644
---- a/x.c
-+++ b/x.c
-@@ -59,6 +59,8 @@ static void zoom(const Arg *);
- static void zoomabs(const Arg *);
- static void zoomreset(const Arg *);
- static void ttysend(const Arg *);
-+static void nextscheme(const Arg *);
-+static void selectscheme(const Arg *);
- 
- /* config.h for applying patches and the configuration. */
- #include "config.h"
-@@ -185,6 +187,7 @@ static void mousesel(XEvent *, int);
- static void mousereport(XEvent *);
- static char *kmap(KeySym, uint);
- static int match(uint, uint);
-+static void updatescheme(void);
- 
- static void run(void);
- static void usage(void);
-@@ -785,7 +788,7 @@ xloadcols(void)
- 		for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
- 			XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
- 	} else {
--		dc.collen = MAX(LEN(colorname), 256);
-+		dc.collen = 258;
- 		dc.col = xmalloc(dc.collen * sizeof(Color));
- 	}
- 
-@@ -2008,6 +2011,47 @@ usage(void)
- 	    " [stty_args ...]\n", argv0, argv0);
- }
- 
-+void
-+nextscheme(const Arg *arg)
-+{
-+	colorscheme += arg->i;
-+	if (colorscheme >= (int)LEN(schemes))
-+		colorscheme = 0;
-+	else if (colorscheme < 0)
-+		colorscheme = LEN(schemes) - 1;
-+	updatescheme();
-+}
-+
-+void
-+selectscheme(const Arg *arg)
-+{
-+	if (BETWEEN(arg->i, 0, LEN(schemes)-1)) {
-+		colorscheme = arg->i;
-+		updatescheme();
-+	}
-+}
-+
-+void
-+updatescheme(void)
-+{
-+	int oldbg, oldfg;
-+
-+	oldbg = defaultbg;
-+	oldfg = defaultfg;
-+	colorname = schemes[colorscheme].colors;
-+	defaultbg = schemes[colorscheme].bg;
-+	defaultfg = schemes[colorscheme].fg;
-+	defaultcs = schemes[colorscheme].cs;
-+	defaultrcs = schemes[colorscheme].rcs;
-+	xloadcols();
-+	if (defaultbg != oldbg)
-+		tupdatebgcolor(oldbg, defaultbg);
-+	if (defaultfg != oldfg)
-+		tupdatefgcolor(oldfg, defaultfg);
-+	cresize(win.w, win.h);
-+	redraw();
-+}
-+
- int
- main(int argc, char *argv[])
- {
-@@ -2060,6 +2104,12 @@ main(int argc, char *argv[])
- 	} ARGEND;
- 
- run:
-+	colorname = schemes[colorscheme].colors;
-+	defaultbg = schemes[colorscheme].bg;
-+	defaultfg = schemes[colorscheme].fg;
-+	defaultcs = schemes[colorscheme].cs;
-+	defaultrcs = schemes[colorscheme].rcs;
-+
- 	if (argc > 0) /* eat all remaining arguments */
- 		opt_cmd = argv;
- 
--- 
-2.36.1
-

st-scrollback-0.8.5.diff

@@ -0,0 +1,350 @@
+diff --git a/config.def.h b/config.def.h
+index 91ab8ca..e3b469b 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -201,6 +201,8 @@ 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 51049ba..cd750f2 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,
+@@ -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(const int *, int);
+ static void tsetchar(Rune, const 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;
+ 
+@@ -851,6 +858,9 @@ 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);
+@@ -1062,12 +1072,52 @@ 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);
+@@ -1078,17 +1128,28 @@ 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);
+ 
+@@ -1098,7 +1159,8 @@ tscrollup(int orig, int n)
+ 		term.line[i+n] = temp;
+ 	}
+ 
+-	selscroll(orig, -n);
++	if (term.scr == 0)
++		selscroll(orig, -n);
+ }
+ 
+ void
+@@ -1127,7 +1189,7 @@ tnewline(int first_col)
+ 	int y = term.c.y;
+ 
+ 	if (y == term.bot) {
+-		tscrollup(term.top, 1);
++		tscrollup(term.top, 1, 1);
+ 	} else {
+ 		y++;
+ 	}
+@@ -1292,14 +1354,14 @@ 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
+@@ -1736,11 +1798,11 @@ 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);
+@@ -2330,7 +2392,7 @@ 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);
+ 		}
+@@ -2343,7 +2405,7 @@ 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);
+ 		}
+@@ -2557,7 +2619,7 @@ 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;
+@@ -2594,6 +2656,14 @@ 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));
+@@ -2652,7 +2722,7 @@ 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);
+ 	}
+ }
+ 
+@@ -2673,8 +2743,9 @@ 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 519b9bd..da36b34 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 *);

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,
@@ -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(const int *, int);
 static void tsetchar(Rune, const 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;
 
@@ -851,6 +858,9 @@ 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);
@@ -1062,12 +1072,52 @@ 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);
@@ -1078,17 +1128,28 @@ tscrolldown(int orig, int n)
 		term.line[i-n] = temp;
 	}
 
+	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);
 
@@ -1098,6 +1159,7 @@ tscrollup(int orig, int n)
 		term.line[i+n] = temp;
 	}
 
+	if (term.scr == 0)
 		selscroll(orig, -n);
 }
 
@@ -1127,7 +1189,7 @@ tnewline(int first_col)
 	int y = term.c.y;
 
 	if (y == term.bot) {
-		tscrollup(term.top, 1);
+		tscrollup(term.top, 1, 1);
 	} else {
 		y++;
 	}
@@ -1292,14 +1354,14 @@ 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
@@ -1736,11 +1798,11 @@ 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);
@@ -2196,28 +2258,6 @@ tstrsequence(uchar c)
 	term.esc |= ESC_STR;
 }
 
-void
-tupdatebgcolor(int oldbg, int newbg)
-{
-	for (int y = 0; y < term.row; y++) {
-		for (int x = 0; x < term.col; x++) {
-			if (term.line[y][x].bg == oldbg)
-				term.line[y][x].bg = newbg;
-		}
-	}
-}
-
-void
-tupdatefgcolor(int oldfg, int newfg)
-{
-	for (int y = 0; y < term.row; y++) {
-		for (int x = 0; x < term.col; x++) {
-			if (term.line[y][x].fg == oldfg)
-				term.line[y][x].fg = newfg;
-		}
-	}
-}
-
 void
 tcontrolcode(uchar ascii)
 {
@@ -2352,7 +2392,7 @@ 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);
 		}
@@ -2365,7 +2405,7 @@ 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);
 		}
@@ -2579,7 +2619,7 @@ 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;
@@ -2616,6 +2656,14 @@ 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));
@@ -2674,7 +2722,7 @@ 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);
 	}
 }
 
@@ -2695,6 +2743,7 @@ draw(void)
 		cx--;
 
 	drawregion(0, 0, term.col, term.row);
+	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;

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 *);
@@ -90,8 +92,6 @@ int tattrset(int);
 void tnew(int, int);
 void tresize(int, int);
 void tsetdirtattr(int);
-void tupdatebgcolor(int, int);
-void tupdatefgcolor(int, int);
 void ttyhangup(void);
 int ttynew(const char *, char *, const char *, char **);
 size_t ttyread(void);

x.c

@@ -59,8 +59,6 @@ static void zoom(const Arg *);
 static void zoomabs(const Arg *);
 static void zoomreset(const Arg *);
 static void ttysend(const Arg *);
-static void nextscheme(const Arg *);
-static void selectscheme(const Arg *);
 
 /* config.h for applying patches and the configuration. */
 #include "config.h"
@@ -187,7 +185,6 @@ static void mousesel(XEvent *, int);
 static void mousereport(XEvent *);
 static char *kmap(KeySym, uint);
 static int match(uint, uint);
-static void updatescheme(void);
 
 static void run(void);
 static void usage(void);
@@ -788,7 +785,7 @@ xloadcols(void)
 		for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
 			XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
 	} else {
-		dc.collen = 258;
+		dc.collen = MAX(LEN(colorname), 256);
 		dc.col = xmalloc(dc.collen * sizeof(Color));
 	}
 
@@ -2011,47 +2008,6 @@ usage(void)
 	    " [stty_args ...]\n", argv0, argv0);
 }
 
-void
-nextscheme(const Arg *arg)
-{
-	colorscheme += arg->i;
-	if (colorscheme >= (int)LEN(schemes))
-		colorscheme = 0;
-	else if (colorscheme < 0)
-		colorscheme = LEN(schemes) - 1;
-	updatescheme();
-}
-
-void
-selectscheme(const Arg *arg)
-{
-	if (BETWEEN(arg->i, 0, LEN(schemes)-1)) {
-		colorscheme = arg->i;
-		updatescheme();
-	}
-}
-
-void
-updatescheme(void)
-{
-	int oldbg, oldfg;
-
-	oldbg = defaultbg;
-	oldfg = defaultfg;
-	colorname = schemes[colorscheme].colors;
-	defaultbg = schemes[colorscheme].bg;
-	defaultfg = schemes[colorscheme].fg;
-	defaultcs = schemes[colorscheme].cs;
-	defaultrcs = schemes[colorscheme].rcs;
-	xloadcols();
-	if (defaultbg != oldbg)
-		tupdatebgcolor(oldbg, defaultbg);
-	if (defaultfg != oldfg)
-		tupdatefgcolor(oldfg, defaultfg);
-	cresize(win.w, win.h);
-	redraw();
-}
-
 int
 main(int argc, char *argv[])
 {
@@ -2104,12 +2060,6 @@ main(int argc, char *argv[])
 	} ARGEND;
 
 run:
-	colorname = schemes[colorscheme].colors;
-	defaultbg = schemes[colorscheme].bg;
-	defaultfg = schemes[colorscheme].fg;
-	defaultcs = schemes[colorscheme].cs;
-	defaultrcs = schemes[colorscheme].rcs;
-
 	if (argc > 0) /* eat all remaining arguments */
 		opt_cmd = argv;