[hackers] [st] st-scrollback update 1/2
I took a few hours to get st-scrollback and st-scrollback-mouse working
again after the 9 March 2018 patches. I did NOT update
st-scrollback-mouse-altscreen.
Following, st-scrollback-20180311-c5ba9c0.diff
I hope this is helpful to someone.
Sincerely,
Gary Allen Vollink
diff -U 3 a/config.def.h b/config.def.h
--- a/config.def.h 2018-03-10 17:55:12.445254900 -0500
+++ b/config.def.h 2018-03-10 23:55:54.468236300 -0500
_AT_@ -178,6 +178,8 @@
{ TERMMOD, XK_Y, 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} },
};
/*
diff -U 3 a/st.c b/st.c
--- a/st.c 2018-03-10 17:55:12.449266800 -0500
+++ b/st.c 2018-03-11 00:36:36.437966200 -0500
_AT_@ -121,6 +121,9 @@
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 */
_AT_@ -188,8 +191,8 @@
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);
_AT_@ -431,10 +434,10 @@
{
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;
_AT_@ -543,7 +546,7 @@
* 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;
_AT_@ -558,14 +561,14 @@
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)))
_AT_@ -586,14 +589,14 @@
*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;
}
_AT_@ -624,13 +627,13 @@
}
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;
_AT_@ -836,6 +839,9 @@
if (buflen > 0)
memmove(buf, buf + written, buflen);
+ if (term.scr > 0 && term.scr < HISTSIZE-1)
+ term.scr++;
+
return ret;
}
_AT_@ -843,6 +849,9 @@
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);
_AT_@ -1054,13 +1063,54 @@
}
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);
_AT_@ -1074,13 +1124,20 @@
}
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;
+ }
+
tclearregion(0, orig, term.col-1, orig+n-1);
tsetdirt(orig+n, term.bot);
_AT_@ -1129,7 +1186,7 @@
int y = term.c.y;
if (y == term.bot) {
- tscrollup(term.top, 1);
+ tscrollup(term.top, 1, 1);
} else {
y++;
}
_AT_@ -1294,14 +1351,14 @@
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
_AT_@ -1730,11 +1787,11 @@
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);
_AT_@ -2258,7 +2315,7 @@
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);
}
_AT_@ -2271,7 +2328,7 @@
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);
}
_AT_@ -2490,7 +2547,7 @@
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;
_AT_@ -2527,7 +2584,15 @@
term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
- /* resize each row to new width, zero-pad if needed */
+ 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 r w 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));
_AT_@ -2584,7 +2649,7 @@
continue;
term.dirty[y] = 0;
- xdrawline(term.line[y], x1, y, x2);
+ xdrawline(TLINE(y), x1, y, x2);
}
}
_AT_@ -2605,8 +2670,10 @@
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 -U 3 a/st.h b/st.h
--- a/st.h 2018-03-10 17:55:12.453776400 -0500
+++ b/st.h 2018-03-11 00:25:11.590522500 -0500
_AT_@ -3,6 +3,9 @@
#include <stdint.h>
#include <sys/types.h>
+/* Arbitrary size */
+#define HISTSIZE 2000
+
/* macros */
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) < (b) ? (b) : (a))
_AT_@ -19,6 +22,8 @@
#define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
#define IS_TRUECOL(x) (1 << 24 & (x))
+#define TLINE(y) ((y) < term.scr ? term.hist[((y) + term.histi -
term.scr \
+ + HISTSIZE + 1) % HISTSIZE] : term.line[(y) - term.scr])
enum glyph_attribute {
ATTR_NULL = 0,
_AT_@ -111,6 +116,9 @@
void *xrealloc(void *, size_t);
char *xstrdup(char *);
+void kscrolldown(const Arg *);
+void kscrollup(const Arg *);
+
/* config.h globals */
extern char *utmp;
extern char *stty_args;
Received on Sun Mar 11 2018 - 08:40:39 CET
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: Sun Mar 11 2018 - 08:48:24 CET