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Merge pull request #73 from veltza/change-ctrl-l-behavior

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Change Ctrl+l behaviour to preserve the scrollback buffer when clearing the screen
This commit is contained in:
Stein Gunnar Bakkeby 2022-07-02 17:59:51 +02:00 committed by GitHub
commit ff557169e4
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 121 additions and 65 deletions
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5
patch/scrollback.c
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@ -26,8 +26,9 @@ kscrollup(const Arg* a)
int n = a->i;
if (n < 0)
n = term.row + n;
if (term.scr + n > term.histi)
n = term.histi - term.scr;
if (term.scr + n > term.histn)
n = term.histn - term.scr;
if (!n)
return;

177
st.c
View File

@ -197,11 +197,10 @@ static void tputc(Rune);
static void treset(void);
#if SCROLLBACK_PATCH
static void tscrollup(int, int, int);
static void tscrolldown(int, int, int);
#else
static void tscrollup(int, int);
static void tscrolldown(int, int);
#endif // SCROLLBACK_PATCH
static void tscrolldown(int, int);
static void tsetattr(const int *, int);
static void tsetchar(Rune, const Glyph *, int, int);
static void tsetdirt(int, int);
@ -1348,7 +1347,11 @@ treset(void)
for (i = 0; i < 2; i++) {
tmoveto(0, 0);
tcursor(CURSOR_SAVE);
#if COLUMNS_PATCH && !VIM_BROWSE_PATCH
tclearregion(0, 0, term.maxcol-1, term.row-1);
#else
tclearregion(0, 0, term.col-1, term.row-1);
#endif // COLUMNS_PATCH
tswapscreen();
}
#if SIXEL_PATCH
@ -1384,11 +1387,7 @@ tswapscreen(void)
}
void
#if SCROLLBACK_PATCH
tscrolldown(int orig, int n, int copyhist)
#else
tscrolldown(int orig, int n)
#endif // SCROLLBACK_PATCH
{
#if VIM_BROWSE_PATCH
if (!orig && historyBufferScroll(-n))
@ -1399,17 +1398,12 @@ tscrolldown(int orig, int n)
LIMIT(n, 0, term.bot-orig+1);
#if SCROLLBACK_PATCH
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;
}
#endif // SCROLLBACK_PATCH
tsetdirt(orig, term.bot-n);
#if COLUMNS_PATCH && !VIM_BROWSE_PATCH
tclearregion(0, term.bot-n+1, term.maxcol-1, term.bot);
#else
tclearregion(0, term.bot-n+1, term.col-1, term.bot);
#endif // COLUMNS_PATCH
for (i = term.bot; i >= orig+n; i--) {
temp = term.line[i];
@ -1418,7 +1412,14 @@ tscrolldown(int orig, int n)
}
#if SIXEL_PATCH
scroll_images(n);
/* move images, if they are inside the scrolling region */
ImageList *im;
for (im = term.images; im; im = im->next) {
if (im->y * win.ch + im->height > orig * win.ch && im->y <= term.bot) {
im->y += n;
im->should_delete |= (im->y >= term.row);
}
}
#endif // SIXEL_PATCH
#if SCROLLBACK_PATCH
@ -1446,18 +1447,25 @@ tscrollup(int orig, int n)
LIMIT(n, 0, term.bot-orig+1);
#if SCROLLBACK_PATCH
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 (copyhist && !IS_SET(MODE_ALTSCREEN)) {
for (i = 0; i < n; i++) {
term.histi = (term.histi + 1) % HISTSIZE;
temp = term.hist[term.histi];
term.hist[term.histi] = term.line[orig+i];
term.line[orig+i] = temp;
}
term.histn = MIN(term.histn + n, HISTSIZE);
if (term.scr > 0 && term.scr < HISTSIZE)
term.scr = MIN(term.scr + n, HISTSIZE-1);
if (term.scr > 0 && term.scr < HISTSIZE)
term.scr = MIN(term.scr + n, HISTSIZE-1);
}
#endif // SCROLLBACK_PATCH
#if COLUMNS_PATCH && !VIM_BROWSE_PATCH
tclearregion(0, orig, term.maxcol-1, orig+n-1);
#else
tclearregion(0, orig, term.col-1, orig+n-1);
#endif // COLUMNS_PATCH
tsetdirt(orig+n, term.bot);
for (i = orig; i <= term.bot-n; i++) {
@ -1467,7 +1475,12 @@ tscrollup(int orig, int n)
}
#if SIXEL_PATCH
#if SCROLLBACK_PATCH
if (term.scr == 0)
scroll_images(-1 * n);
#else
scroll_images(-1 * n);
#endif
#endif // SIXEL_PATCH
#if SCROLLBACK_PATCH
@ -1713,11 +1726,7 @@ void
tinsertblankline(int n)
{
if (BETWEEN(term.c.y, term.top, term.bot))
#if SCROLLBACK_PATCH
tscrolldown(term.c.y, n, 0);
#else
tscrolldown(term.c.y, n);
#endif // SCROLLBACK_PATCH
}
void
@ -2029,8 +2038,11 @@ tsetmode(int priv, int set, const int *args, int narg)
break;
alt = IS_SET(MODE_ALTSCREEN);
if (alt) {
tclearregion(0, 0, term.col-1,
term.row-1);
#if COLUMNS_PATCH && !VIM_BROWSE_PATCH
tclearregion(0, 0, term.maxcol-1, term.row-1);
#else
tclearregion(0, 0, term.col-1, term.row-1);
#endif // COLUMNS_PATCH
}
if (set ^ alt) /* set is always 1 or 0 */
tswapscreen();
@ -2088,11 +2100,16 @@ tsetmode(int priv, int set, const int *args, int narg)
void
csihandle(void)
{
char buf[40];
char buffer[40];
int len;
#if SIXEL_PATCH
ImageList *im;
#endif // SIXEL_PATCH
#if COLUMNS_PATCH && !VIM_BROWSE_PATCH
int maxcol = term.maxcol;
#else
int maxcol = term.col;
#endif // COLUMNS_PATCH
switch (csiescseq.mode[0]) {
default:
@ -2190,35 +2207,82 @@ csihandle(void)
case 'J': /* ED -- Clear screen */
switch (csiescseq.arg[0]) {
case 0: /* below */
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
tclearregion(term.c.x, term.c.y, maxcol-1, term.c.y);
if (term.c.y < term.row-1) {
tclearregion(0, term.c.y+1, term.col-1,
tclearregion(0, term.c.y+1, maxcol-1,
term.row-1);
}
break;
case 1: /* above */
if (term.c.y > 1)
tclearregion(0, 0, term.col-1, term.c.y-1);
tclearregion(0, 0, maxcol-1, term.c.y-1);
tclearregion(0, term.c.y, term.c.x, term.c.y);
break;
case 2: /* screen */
tclearregion(0, 0, term.col-1, term.row-1);
break;
case 3: /* all including scrollback */
tclearregion(0, 0, term.col-1, term.row-1);
#if SCROLLBACK_PATCH
term.scr = 0;
term.histi = 0;
for (int i = 0; i < HISTSIZE; i++)
term.hist[i][0].u = '\0';
#if SCROLLBACK_PATCH || VIM_BROWSE_PATCH
if (!IS_SET(MODE_ALTSCREEN)) {
#if SCROLLBACK_PATCH
kscrolldown(&((Arg){ .i = term.scr }));
#endif
int n, m, bot = term.bot;
term.bot = term.row-1;
for (n = term.row-1; n >= 0; n--) {
for (m = 0; m < maxcol && term.line[n][m].u == ' ' && !term.line[n][m].mode; m++);
if (m < maxcol) {
#if SCROLLBACK_PATCH
tscrollup(0, n+1, 1);
#else
tscrollup(0, n+1);
#endif
break;
}
}
if (n < term.row-1)
tclearregion(0, 0, maxcol-1, term.row-n-2);
term.bot = bot;
break;
}
#endif // SCROLLBACK_PATCH
tclearregion(0, 0, maxcol-1, term.row-1);
#if SIXEL_PATCH
for (im = term.images; im; im = im->next)
im->should_delete = 1;
#endif // SIXEL_PATCH
break;
case 3: /* scrollback */
#if VIM_BROWSE_PATCH
if (!IS_SET(MODE_ALTSCREEN)) {
Glyph g=(Glyph){.bg=term.c.attr.bg, .fg=term.c.attr.fg, .u=' ', .mode=0};
for (int i = 0; i < buffSize; ++i) {
if (!BETWEEN(i, insertOff, insertOff + term.row - 1) &&
!(insertOff + term.row > buffSize &&
BETWEEN(i, 0, (insertOff + term.row - 1) % buffSize))) {
for (int j = 0; j < term.col; ++j)
buf[i][j] = g;
}
}
}
#elif SCROLLBACK_PATCH
if (!IS_SET(MODE_ALTSCREEN)) {
term.scr = 0;
term.histi = 0;
term.histn = 0;
Glyph g=(Glyph){.bg=term.c.attr.bg, .fg=term.c.attr.fg, .u=' ', .mode=0};
for (int i = 0; i < HISTSIZE; i++) {
for (int j = 0; j < maxcol; j++)
term.hist[i][j] = g;
}
}
#endif // SCROLLBACK_PATCH
#if SIXEL_PATCH
if (!IS_SET(MODE_ALTSCREEN)) {
for (im = term.images; im; im = im->next)
im->should_delete |= (im->y * win.ch + im->height <= 0);
}
#endif // SIXEL_PATCH
break;
default:
goto unknown;
}
@ -2226,14 +2290,14 @@ csihandle(void)
case 'K': /* EL -- Clear line */
switch (csiescseq.arg[0]) {
case 0: /* right */
tclearregion(term.c.x, term.c.y, term.col-1,
tclearregion(term.c.x, term.c.y, maxcol-1,
term.c.y);
break;
case 1: /* left */
tclearregion(0, term.c.y, term.c.x, term.c.y);
break;
case 2: /* all */
tclearregion(0, term.c.y, term.col-1, term.c.y);
tclearregion(0, term.c.y, maxcol-1, term.c.y);
break;
}
break;
@ -2249,13 +2313,7 @@ csihandle(void)
break;
case 'T': /* SD -- Scroll <n> line down */
DEFAULT(csiescseq.arg[0], 1);
#if SIXEL_PATCH && SCROLLBACK_PATCH
tscrolldown(term.top, csiescseq.arg[0], 1);
#elif SCROLLBACK_PATCH
tscrolldown(term.top, csiescseq.arg[0], 0);
#else
tscrolldown(term.top, csiescseq.arg[0]);
#endif // SCROLLBACK_PATCH
break;
case 'L': /* IL -- Insert <n> blank lines */
DEFAULT(csiescseq.arg[0], 1);
@ -2293,9 +2351,9 @@ csihandle(void)
break;
case 'n': /* DSR – Device Status Report (cursor position) */
if (csiescseq.arg[0] == 6) {
len = snprintf(buf, sizeof(buf), "\033[%i;%iR",
len = snprintf(buffer, sizeof(buffer), "\033[%i;%iR",
term.c.y+1, term.c.x+1);
ttywrite(buf, len, 0);
ttywrite(buffer, len, 0);
}
break;
case 'r': /* DECSTBM -- Set Scrolling Region */
@ -2969,11 +3027,7 @@ eschandle(uchar ascii)
break;
case 'M': /* RI -- Reverse index */
if (term.c.y == term.top) {
#if SCROLLBACK_PATCH
tscrolldown(term.top, 1, 1);
#else
tscrolldown(term.top, 1);
#endif // SCROLLBACK_PATCH
} else {
tmoveto(term.c.x, term.c.y-1);
}
@ -3316,12 +3370,11 @@ tresize(int col, int row)
term.tabs = xrealloc(term.tabs, col * sizeof(*term.tabs));
#if SCROLLBACK_PATCH
Glyph gc=(Glyph){.bg=term.c.attr.bg, .fg=term.c.attr.fg, .u=' ', .mode=0};
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 = ' ';
}
for (j = mincol; j < col; j++)
term.hist[i][j] = gc;
}
#endif // SCROLLBACK_PATCH

1
st.h
View File

@ -148,6 +148,7 @@ typedef struct {
#if SCROLLBACK_PATCH
Line hist[HISTSIZE]; /* history buffer */
int histi; /* history index */
int histn; /* number of history entries */
int scr; /* scroll back */
#endif // SCROLLBACK_PATCH
int *dirty; /* dirtyness of lines */

3
st.info
View File

@ -10,7 +10,7 @@ st-mono| simpleterm monocolor,
cbt=\E[Z,
cvvis=\E[?25h,
civis=\E[?25l,
clear=\E[H\E[3J,
clear=\E[H\E[2J,
cnorm=\E[?12l\E[?25h,
colors#2,
cols#80,
@ -35,6 +35,7 @@ st-mono| simpleterm monocolor,
el=\E[K,
el1=\E[1K,
enacs=\E)0,
E3=\E[3J,
flash=\E[?5h$<80/>\E[?5l,
fsl=^G,
home=\E[H,