---
config.def.h | 3 ++
st.c | 116 ++++++++++++++++++++++++++++++++++++++++++++++-------------
2 files changed, 95 insertions(+), 24 deletions(-)
diff --git a/config.def.h b/config.def.h
index def6c9e..35cd624 100644
--- a/config.def.h
+++ b/config.def.h
_AT_@ -7,6 +7,7 @@
*/
static char font[] = "Liberation Mono:pixelsize=12:antialias=false:autohint=false";
static int borderpx = 2;
+static int histsize = 2000;
static char shell[] = "/bin/sh";
/* Kerning / character bounding-box mutlipliers */
_AT_@ -112,6 +113,8 @@ static Shortcut shortcuts[] = {
{ ShiftMask, XK_Insert, selpaste, {.i = 0} },
{ MODKEY|ShiftMask, XK_Insert, clippaste, {.i = 0} },
{ MODKEY, 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 50b58a7..7408fe4 100644
--- a/st.c
+++ b/st.c
_AT_@ -84,6 +84,8 @@ char *argv0;
#define TRUERED(x) (((x) & 0xff0000) >> 8)
#define TRUEGREEN(x) (((x) & 0xff00))
#define TRUEBLUE(x) (((x) & 0xff) << 8)
+#define TLINE(y) ((y) < term.scr ? term.hist[((y) + term.histi - term.scr \
+ + histsize + 1) % histsize] : term.line[(y) - term.scr])
#define VT102ID "\033[?6c"
_AT_@ -220,6 +222,9 @@ typedef struct {
int col; /* nb col */
Line *line; /* screen */
Line *alt; /* alternate screen */
+ Line *hist; /* history buffer */
+ int histi; /* history index */
+ int scr; /* scroll back */
bool *dirty; /* dirtyness of lines */
TCursor c; /* cursor */
int top; /* top scroll limit */
_AT_@ -309,6 +314,8 @@ typedef struct {
/* function definitions used in config.h */
static void clippaste(const Arg *);
+static void kscrolldown(const Arg *);
+static void kscrollup(const Arg *);
static void numlock(const Arg *);
static void selpaste(const Arg *);
static void xzoom(const Arg *);
_AT_@ -368,8 +375,8 @@ static void tputtab(bool);
static void tputc(char *, int);
static void treset(void);
static int tresize(int, int);
-static void tscrollup(int, int);
-static void tscrolldown(int, int);
+static void tscrollup(int, int, bool);
+static void tscrolldown(int, int, bool);
static void tsetattr(int*, int);
static void tsetchar(char *, Glyph *, int, int);
static void tsetscroll(int, int);
_AT_@ -721,7 +728,7 @@ selsnap(int mode, int *x, int *y, int direction) {
*/
for(;;) {
if(direction < 0 && *x <= 0) {
- if(*y > 0 && term.line[*y - 1][term.col-1].mode
+ if(*y > 0 && TLINE(*y - 1)[term.col-1].mode
& ATTR_WRAP) {
*y -= 1;
*x = term.col-1;
_AT_@ -730,7 +737,7 @@ selsnap(int mode, int *x, int *y, int direction) {
}
}
if(direction > 0 && *x >= term.col-1) {
- if(*y < term.row-1 && term.line[*y][*x].mode
+ if(*y < term.row-1 && TLINE(*y)[*x].mode
& ATTR_WRAP) {
*y += 1;
*x = 0;
_AT_@ -739,13 +746,13 @@ selsnap(int mode, int *x, int *y, int direction) {
}
}
- if(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
+ if(TLINE(*y)[*x+direction].mode & ATTR_WDUMMY) {
*x += direction;
continue;
}
if(strchr(worddelimiters,
- term.line[*y][*x+direction].c[0])) {
+ TLINE(*y)[*x+direction].c[0])) {
break;
}
_AT_@ -761,14 +768,14 @@ selsnap(int mode, int *x, int *y, int direction) {
*x = (direction < 0) ? 0 : term.col - 1;
if(direction < 0 && *y > 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 && *y < term.row-1) {
for(; *y < term.row; *y += direction) {
- if(!(term.line[*y][term.col-1].mode
+ if(!(TLINE(*y)[term.col-1].mode
& ATTR_WRAP)) {
break;
}
_AT_@ -781,7 +788,7 @@ selsnap(int mode, int *x, int *y, int direction) {
*/
if(direction > 0) {
i = term.col;
- while(--i > 0 && term.line[*y][i].c[0] == ' ')
+ while(--i > 0 && TLINE(*y)[i].c[0] == ' ')
/* nothing */;
if(i > 0 && i < *x)
*x = term.col - 1;
_AT_@ -951,7 +958,7 @@ selcopy(void) {
/* append every set & selected glyph to the selection */
for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
- gp = &term.line[y][0];
+ gp = &TLINE(y)[0];
last = gp + term.col;
while(--last >= gp && !(selected(last - gp, y) && \
_AT_@ -985,7 +992,7 @@ selcopy(void) {
*/
if(y == sel.ne.y) {
i = term.col;
- while(--i > 0 && term.line[y][i].c[0] == ' ')
+ while(--i > 0 && TLINE(y)[i].c[0] == ' ')
/* nothing */;
ex = sel.ne.x;
if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
_AT_@ -1290,10 +1297,16 @@ ttyread(void) {
/* keep any uncomplete utf8 char for the next call */
memmove(buf, ptr, buflen);
+ if(term.scr > 0 && term.scr < histsize-1)
+ term.scr++;
}
void
ttywrite(const char *s, size_t n) {
+ Arg arg = (Arg){ .i = term.scr };
+
+ kscrolldown(&arg);
+
if(write(cmdfd, s, n) == -1)
die("write error on tty: %s\n", SERRNO);
}
_AT_@ -1418,12 +1431,50 @@ 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, bool 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;
+ }
+
tclearregion(0, term.bot-n+1, term.col-1, term.bot);
for(i = term.bot; i >= orig+n; i--) {
_AT_@ -1439,11 +1490,18 @@ tscrolldown(int orig, int n) {
}
void
-tscrollup(int orig, int n) {
+tscrollup(int orig, int n, bool 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;
+ }
+
tclearregion(0, orig, term.col-1, orig+n-1);
for(i = orig; i <= term.bot-n; i++) {
_AT_@ -1492,7 +1550,7 @@ tnewline(int first_col) {
int y = term.c.y;
if(y == term.bot) {
- tscrollup(term.top, 1);
+ tscrollup(term.top, 1, true);
} else {
y++;
}
_AT_@ -1655,7 +1713,7 @@ tinsertblankline(int n) {
if(term.c.y < term.top || term.c.y > term.bot)
return;
- tscrolldown(term.c.y, n);
+ tscrolldown(term.c.y, n, false);
}
void
_AT_@ -1663,7 +1721,7 @@ tdeleteline(int n) {
if(term.c.y < term.top || term.c.y > term.bot)
return;
- tscrollup(term.c.y, n);
+ tscrollup(term.c.y, n, false);
}
long
_AT_@ -2053,11 +2111,11 @@ 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], false);
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], false);
break;
case 'L': /* IL -- Insert <n> blank lines */
DEFAULT(csiescseq.arg[0], 1);
_AT_@ -2474,7 +2532,7 @@ tputc(char *c, int len) {
break;
case 'D': /* IND -- Linefeed */
if(term.c.y == term.bot) {
- tscrollup(term.top, 1);
+ tscrollup(term.top, 1, true);
} else {
tmoveto(term.c.x, term.c.y+1);
}
_AT_@ -2490,7 +2548,7 @@ tputc(char *c, int len) {
break;
case 'M': /* RI -- Reverse index */
if(term.c.y == term.top) {
- tscrolldown(term.top, 1);
+ tscrolldown(term.top, 1, true);
} else {
tmoveto(term.c.x, term.c.y-1);
}
_AT_@ -2576,7 +2634,7 @@ tputc(char *c, int len) {
int
tresize(int col, int row) {
- int i;
+ int i, j;
int minrow = MIN(row, term.row);
int mincol = MIN(col, term.col);
int slide = term.c.y - row + 1;
_AT_@ -2609,9 +2667,18 @@ tresize(int col, int row) {
/* resize to new height */
term.line = xrealloc(term.line, row * sizeof(Line));
term.alt = xrealloc(term.alt, row * sizeof(Line));
+ term.hist = xrealloc(term.hist, histsize * sizeof(Line));
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;
+ memcpy(term.hist[i][j].c, " ", 2);
+ }
+ }
+
/* resize each row to new width, zero-pad if needed */
for(i = 0; i < minrow; i++) {
term.dirty[i] = 1;
_AT_@ -3406,10 +3473,10 @@ drawregion(int x1, int y1, int x2, int y2) {
xtermclear(0, y, term.col, y);
term.dirty[y] = 0;
- base = term.line[y][0];
+ base = TLINE(y)[0];
ic = ib = ox = 0;
for(x = x1; x < x2; x++) {
- new = term.line[y][x];
+ new = TLINE(y)[x];
if(new.mode == ATTR_WDUMMY)
continue;
if(ena_sel && selected(x, y))
_AT_@ -3432,7 +3499,8 @@ drawregion(int x1, int y1, int x2, int y2) {
if(ib > 0)
xdraws(buf, base, ox, y, ic, ib);
}
- xdrawcursor();
+ if(term.scr == 0)
+ xdrawcursor();
}
void
--
1.8.4.rc3
--tThc/1wpZn/ma/RB--
Received on Mon Sep 17 2001 - 00:00:00 CEST
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