mirror of
https://github.com/alrayyes/st.git
synced 2024-11-22 19:26:22 +00:00
342 lines
8.7 KiB
Diff
342 lines
8.7 KiB
Diff
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diff --git a/config.def.h b/config.def.h
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index a719e36..9b51988 100644
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--- a/config.def.h
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+++ b/config.def.h
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@@ -178,6 +178,8 @@ static Shortcut shortcuts[] = {
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{ MODKEY|ShiftMask, XK_V, clippaste, {.i = 0} },
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{ MODKEY, XK_Num_Lock, numlock, {.i = 0} },
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{ MODKEY, XK_Control_L, iso14755, {.i = 0} },
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+ { ShiftMask, XK_Page_Up, kscrollup, {.i = -1} },
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+ { ShiftMask, XK_Page_Down, kscrolldown, {.i = -1} },
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};
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/*
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diff --git a/st.c b/st.c
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index fbcd9e0..64bc208 100644
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--- a/st.c
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+++ b/st.c
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@@ -61,6 +61,7 @@ char *argv0;
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#define XK_ANY_MOD UINT_MAX
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#define XK_NO_MOD 0
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#define XK_SWITCH_MOD (1<<13)
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+#define histsize 2000
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/* macros */
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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@@ -87,6 +88,8 @@ char *argv0;
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#define TRUERED(x) (((x) & 0xff0000) >> 8)
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#define TRUEGREEN(x) (((x) & 0xff00))
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#define TRUEBLUE(x) (((x) & 0xff) << 8)
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+#define TLINE(y) ((y) < term.scr ? term.hist[((y) + term.histi - term.scr \
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+ + histsize + 1) % histsize] : term.line[(y) - term.scr])
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/* constants */
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#define ISO14755CMD "dmenu -w %lu -p codepoint: </dev/null"
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@@ -241,6 +244,9 @@ typedef struct {
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int col; /* nb col */
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Line *line; /* screen */
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Line *alt; /* alternate screen */
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+ Line hist[histsize]; /* history buffer */
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+ int histi; /* history index */
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+ int scr; /* scroll back */
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int *dirty; /* dirtyness of lines */
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XftGlyphFontSpec *specbuf; /* font spec buffer used for rendering */
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TCursor c; /* cursor */
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@@ -334,6 +340,8 @@ typedef struct {
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/* function definitions used in config.h */
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static void clipcopy(const Arg *);
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static void clippaste(const Arg *);
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+static void kscrolldown(const Arg *);
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+static void kscrollup(const Arg *);
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static void numlock(const Arg *);
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static void selpaste(const Arg *);
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static void xzoom(const Arg *);
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@@ -409,8 +417,8 @@ static void tputtab(int);
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static void tputc(Rune);
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static void treset(void);
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static void tresize(int, int);
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-static void tscrollup(int, int);
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-static void tscrolldown(int, int);
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+static void tscrollup(int, int, int);
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+static void tscrolldown(int, int, int);
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static void tsetattr(int *, int);
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static void tsetchar(Rune, Glyph *, int, int);
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static void tsetscroll(int, int);
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@@ -742,10 +750,10 @@ tlinelen(int y)
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{
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int i = term.col;
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- if (term.line[y][i - 1].mode & ATTR_WRAP)
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+ if (TLINE(y)[i - 1].mode & ATTR_WRAP)
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return i;
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- while (i > 0 && term.line[y][i - 1].u == ' ')
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+ while (i > 0 && TLINE(y)[i - 1].u == ' ')
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--i;
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return i;
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@@ -807,7 +815,7 @@ selsnap(int *x, int *y, int direction)
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* Snap around if the word wraps around at the end or
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* beginning of a line.
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*/
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- prevgp = &term.line[*y][*x];
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+ prevgp = &TLINE(*y)[*x];
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prevdelim = ISDELIM(prevgp->u);
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for (;;) {
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newx = *x + direction;
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@@ -822,14 +830,14 @@ selsnap(int *x, int *y, int direction)
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yt = *y, xt = *x;
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else
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yt = newy, xt = newx;
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- if (!(term.line[yt][xt].mode & ATTR_WRAP))
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+ if (!(TLINE(yt)[xt].mode & ATTR_WRAP))
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break;
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}
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if (newx >= tlinelen(newy))
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break;
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- gp = &term.line[newy][newx];
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+ gp = &TLINE(newy)[newx];
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delim = ISDELIM(gp->u);
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if (!(gp->mode & ATTR_WDUMMY) && (delim != prevdelim
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|| (delim && gp->u != prevgp->u)))
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@@ -850,14 +858,14 @@ selsnap(int *x, int *y, int direction)
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*x = (direction < 0) ? 0 : term.col - 1;
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if (direction < 0) {
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for (; *y > 0; *y += direction) {
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- if (!(term.line[*y-1][term.col-1].mode
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+ if (!(TLINE(*y-1)[term.col-1].mode
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& ATTR_WRAP)) {
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break;
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}
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}
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} else if (direction > 0) {
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for (; *y < term.row-1; *y += direction) {
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- if (!(term.line[*y][term.col-1].mode
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+ if (!(TLINE(*y)[term.col-1].mode
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& ATTR_WRAP)) {
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break;
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}
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@@ -1023,13 +1031,13 @@ getsel(void)
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}
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if (sel.type == SEL_RECTANGULAR) {
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- gp = &term.line[y][sel.nb.x];
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+ gp = &TLINE(y)[sel.nb.x];
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lastx = sel.ne.x;
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} else {
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- gp = &term.line[y][sel.nb.y == y ? sel.nb.x : 0];
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+ gp = &TLINE(y)[sel.nb.y == y ? sel.nb.x : 0];
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lastx = (sel.ne.y == y) ? sel.ne.x : term.col-1;
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}
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- last = &term.line[y][MIN(lastx, linelen-1)];
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+ last = &TLINE(y)[MIN(lastx, linelen-1)];
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while (last >= gp && last->u == ' ')
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--last;
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@@ -1513,6 +1521,9 @@ ttyread(void)
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if (buflen > 0)
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memmove(buf, ptr, buflen);
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+ if (term.scr > 0 && term.scr < histsize-1)
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+ term.scr++;
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+
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return ret;
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}
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@@ -1522,6 +1533,9 @@ ttywrite(const char *s, size_t n)
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fd_set wfd, rfd;
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ssize_t r;
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size_t lim = 256;
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+ Arg arg = (Arg) { .i = term.scr };
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+
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+ kscrolldown(&arg);
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/*
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* Remember that we are using a pty, which might be a modem line.
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@@ -1724,13 +1738,53 @@ tswapscreen(void)
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}
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void
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-tscrolldown(int orig, int n)
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+kscrolldown(const Arg* a)
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+{
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+ int n = a->i;
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+
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+ if (n < 0)
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+ n = term.row + n;
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+
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+ if (n > term.scr)
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+ n = term.scr;
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+
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+ if (term.scr > 0) {
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+ term.scr -= n;
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+ selscroll(0, -n);
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+ tfulldirt();
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+ }
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+}
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+
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+void
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+kscrollup(const Arg* a)
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+{
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+ int n = a->i;
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+
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+ if (n < 0)
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+ n = term.row + n;
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+
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+ if (term.scr <= histsize - n) {
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+ term.scr += n;
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+ selscroll(0, n);
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+ tfulldirt();
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+ }
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+}
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+
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+void
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+tscrolldown(int orig, int n, int copyhist)
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{
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int i;
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Line temp;
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LIMIT(n, 0, term.bot-orig+1);
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+ if (copyhist) {
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+ term.histi = (term.histi - 1 + histsize) % histsize;
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+ temp = term.hist[term.histi];
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+ term.hist[term.histi] = term.line[term.bot];
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+ term.line[term.bot] = temp;
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+ }
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+
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tsetdirt(orig, term.bot-n);
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tclearregion(0, term.bot-n+1, term.col-1, term.bot);
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@@ -1744,13 +1798,20 @@ tscrolldown(int orig, int n)
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}
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void
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-tscrollup(int orig, int n)
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+tscrollup(int orig, int n, int copyhist)
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{
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int i;
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Line temp;
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LIMIT(n, 0, term.bot-orig+1);
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+ if (copyhist) {
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+ term.histi = (term.histi + 1) % histsize;
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+ temp = term.hist[term.histi];
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+ term.hist[term.histi] = term.line[orig];
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+ term.line[orig] = temp;
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+ }
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+
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tclearregion(0, orig, term.col-1, orig+n-1);
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tsetdirt(orig+n, term.bot);
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@@ -1799,7 +1860,7 @@ tnewline(int first_col)
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int y = term.c.y;
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if (y == term.bot) {
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- tscrollup(term.top, 1);
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+ tscrollup(term.top, 1, 1);
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} else {
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y++;
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}
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@@ -1964,14 +2025,14 @@ void
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tinsertblankline(int n)
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{
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if (BETWEEN(term.c.y, term.top, term.bot))
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- tscrolldown(term.c.y, n);
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+ tscrolldown(term.c.y, n, 0);
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}
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void
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tdeleteline(int n)
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{
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if (BETWEEN(term.c.y, term.top, term.bot))
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- tscrollup(term.c.y, n);
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+ tscrollup(term.c.y, n, 0);
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}
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int32_t
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@@ -2405,11 +2466,11 @@ csihandle(void)
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break;
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case 'S': /* SU -- Scroll <n> line up */
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DEFAULT(csiescseq.arg[0], 1);
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- tscrollup(term.top, csiescseq.arg[0]);
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+ tscrollup(term.top, csiescseq.arg[0], 0);
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break;
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case 'T': /* SD -- Scroll <n> line down */
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DEFAULT(csiescseq.arg[0], 1);
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- tscrolldown(term.top, csiescseq.arg[0]);
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+ tscrolldown(term.top, csiescseq.arg[0], 0);
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break;
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case 'L': /* IL -- Insert <n> blank lines */
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DEFAULT(csiescseq.arg[0], 1);
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@@ -2945,7 +3006,7 @@ eschandle(uchar ascii)
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return 0;
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case 'D': /* IND -- Linefeed */
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if (term.c.y == term.bot) {
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- tscrollup(term.top, 1);
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+ tscrollup(term.top, 1, 1);
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} else {
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tmoveto(term.c.x, term.c.y+1);
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}
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@@ -2958,7 +3019,7 @@ eschandle(uchar ascii)
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break;
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case 'M': /* RI -- Reverse index */
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if (term.c.y == term.top) {
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- tscrolldown(term.top, 1);
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+ tscrolldown(term.top, 1, 1);
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} else {
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tmoveto(term.c.x, term.c.y-1);
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}
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@@ -3145,7 +3206,7 @@ check_control_code:
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void
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tresize(int col, int row)
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{
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- int i;
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+ int i, j;
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int minrow = MIN(row, term.row);
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int mincol = MIN(col, term.col);
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int *bp;
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@@ -3185,6 +3246,14 @@ tresize(int col, int row)
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term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
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term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
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+ for (i = 0; i < histsize; i++) {
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+ term.hist[i] = xrealloc(term.hist[i], col * sizeof(Glyph));
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+ for (j = mincol; j < col; j++) {
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+ term.hist[i][j] = term.c.attr;
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+ term.hist[i][j].u = ' ';
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+ }
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+ }
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+
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/* resize each row to new width, zero-pad if needed */
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for (i = 0; i < minrow; i++) {
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term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph));
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@@ -4112,11 +4181,11 @@ drawregion(int x1, int y1, int x2, int y2)
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term.dirty[y] = 0;
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specs = term.specbuf;
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- numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
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+ numspecs = xmakeglyphfontspecs(specs, &TLINE(y)[x1], x2 - x1, x1, y);
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i = ox = 0;
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for (x = x1; x < x2 && i < numspecs; x++) {
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- new = term.line[y][x];
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+ new = TLINE(y)[x];
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if (new.mode == ATTR_WDUMMY)
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continue;
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if (ena_sel && selected(x, y))
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@@ -4136,7 +4205,9 @@ drawregion(int x1, int y1, int x2, int y2)
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if (i > 0)
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xdrawglyphfontspecs(specs, base, i, ox, y);
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}
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- xdrawcursor();
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+
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+ if (term.scr == 0)
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+ xdrawcursor();
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}
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void
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