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351 lines
8.7 KiB
351 lines
8.7 KiB
1 year ago
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diff --git a/config.def.h b/config.def.h
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index 91ab8ca..e3b469b 100644
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--- a/config.def.h
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+++ b/config.def.h
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@@ -201,6 +201,8 @@ static Shortcut shortcuts[] = {
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{ TERMMOD, XK_Y, selpaste, {.i = 0} },
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{ ShiftMask, XK_Insert, selpaste, {.i = 0} },
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{ TERMMOD, XK_Num_Lock, numlock, {.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 51049ba..cd750f2 100644
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--- a/st.c
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+++ b/st.c
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@@ -35,6 +35,7 @@
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#define ESC_ARG_SIZ 16
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#define STR_BUF_SIZ ESC_BUF_SIZ
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#define STR_ARG_SIZ ESC_ARG_SIZ
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+#define HISTSIZE 2000
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/* macros */
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#define IS_SET(flag) ((term.mode & (flag)) != 0)
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@@ -42,6 +43,9 @@
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#define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
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#define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
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#define ISDELIM(u) (u && wcschr(worddelimiters, u))
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+#define TLINE(y) ((y) < term.scr ? term.hist[((y) + term.histi - \
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+ term.scr + HISTSIZE + 1) % HISTSIZE] : \
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+ term.line[(y) - term.scr])
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enum term_mode {
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MODE_WRAP = 1 << 0,
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@@ -115,6 +119,9 @@ 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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TCursor c; /* cursor */
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int ocx; /* old cursor col */
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@@ -184,8 +191,8 @@ static void tnewline(int);
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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 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(const int *, int);
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static void tsetchar(Rune, const Glyph *, int, int);
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static void tsetdirt(int, int);
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@@ -416,10 +423,10 @@ 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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@@ -528,7 +535,7 @@ 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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@@ -543,14 +550,14 @@ 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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@@ -571,14 +578,14 @@ 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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@@ -609,13 +616,13 @@ 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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@@ -851,6 +858,9 @@ void
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ttywrite(const char *s, size_t n, int may_echo)
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{
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const char *next;
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+ Arg arg = (Arg) { .i = term.scr };
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+
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+ kscrolldown(&arg);
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if (may_echo && IS_SET(MODE_ECHO))
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twrite(s, n, 1);
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@@ -1062,12 +1072,52 @@ 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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@@ -1078,17 +1128,28 @@ tscrolldown(int orig, int n)
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term.line[i-n] = temp;
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}
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- selscroll(orig, n);
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+ if (term.scr == 0)
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+ selscroll(orig, 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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+ if (term.scr > 0 && term.scr < HISTSIZE)
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+ term.scr = MIN(term.scr + n, HISTSIZE-1);
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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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@@ -1098,7 +1159,8 @@ tscrollup(int orig, int n)
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term.line[i+n] = temp;
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}
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- selscroll(orig, -n);
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+ if (term.scr == 0)
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+ selscroll(orig, -n);
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}
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void
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@@ -1127,7 +1189,7 @@ 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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@@ -1292,14 +1354,14 @@ 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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@@ -1736,11 +1798,11 @@ 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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@@ -2330,7 +2392,7 @@ 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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@@ -2343,7 +2405,7 @@ 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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@@ -2557,7 +2619,7 @@ twrite(const char *buf, int buflen, int show_ctrl)
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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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@@ -2594,6 +2656,14 @@ 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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@@ -2652,7 +2722,7 @@ drawregion(int x1, int y1, int x2, int y2)
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continue;
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term.dirty[y] = 0;
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- xdrawline(term.line[y], x1, y, x2);
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+ xdrawline(TLINE(y), x1, y, x2);
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}
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}
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@@ -2673,8 +2743,9 @@ draw(void)
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cx--;
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drawregion(0, 0, term.col, term.row);
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- xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
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- term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
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+ if (term.scr == 0)
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+ xdrawcursor(cx, term.c.y, term.line[term.c.y][cx],
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+ term.ocx, term.ocy, term.line[term.ocy][term.ocx]);
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term.ocx = cx;
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term.ocy = term.c.y;
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xfinishdraw();
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diff --git a/st.h b/st.h
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index 519b9bd..da36b34 100644
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--- a/st.h
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||
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+++ b/st.h
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@@ -81,6 +81,8 @@ void die(const char *, ...);
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void redraw(void);
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void draw(void);
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+void kscrolldown(const Arg *);
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+void kscrollup(const Arg *);
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void printscreen(const Arg *);
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void printsel(const Arg *);
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void sendbreak(const Arg *);
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