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commit 10bf3c85073325a2e3fd4c2201b7a3e4770e70d3
parent 683341140065b3096ee9e7e3e3b042f9c52230a6
Author: Shiva <shiv@shiv.me>
Date:   Sun, 29 Jan 2017 21:39:12 -0800

Scrollback + wheel support

Diffstat:
Mconfig.def.h | 12++++++++++--
Mst.c | 137++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---------------
2 files changed, 122 insertions(+), 27 deletions(-)

diff --git a/config.def.h b/config.def.h @@ -156,8 +156,14 @@ static unsigned int defaultattr = 11; */ static MouseShortcut mshortcuts[] = { /* button mask string */ - { Button4, XK_ANY_MOD, "\031" }, - { Button5, XK_ANY_MOD, "\005" }, + { Button4, XK_NO_MOD, "\031" }, + { Button5, XK_NO_MOD, "\005" }, +}; + +static MouseKey mkeys[] = { + /* button mask function argument */ + { Button4, ShiftMask, kscrollup, {.i = 1} }, + { Button5, ShiftMask, kscrolldown, {.i = 1} }, }; /* Internal keyboard shortcuts. */ @@ -178,6 +184,8 @@ static Shortcut shortcuts[] = { { MODKEY|ShiftMask, XK_V, clippaste, {.i = 0} }, { MODKEY, XK_Num_Lock, numlock, {.i = 0} }, { MODKEY, XK_Control_L, iso14755, {.i = 0} }, + { ShiftMask, XK_Page_Up, kscrollup, {.i = -1} }, + { ShiftMask, XK_Page_Down, kscrolldown, {.i = -1} }, }; /* diff --git a/st.c b/st.c @@ -61,6 +61,7 @@ char *argv0; #define XK_ANY_MOD UINT_MAX #define XK_NO_MOD 0 #define XK_SWITCH_MOD (1<<13) +#define histsize 2000 /* macros */ #define MIN(a, b) ((a) < (b) ? (a) : (b)) @@ -87,6 +88,8 @@ 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]) /* constants */ #define ISO14755CMD "dmenu -w %lu -p codepoint: </dev/null" @@ -241,6 +244,9 @@ typedef struct { 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 */ XftGlyphFontSpec *specbuf; /* font spec buffer used for rendering */ TCursor c; /* cursor */ @@ -325,6 +331,13 @@ typedef union { } Arg; typedef struct { + uint b; + uint mask; + void (*func)(const Arg *); + const Arg arg; +} MouseKey; + +typedef struct { uint mod; KeySym keysym; void (*func)(const Arg *); @@ -334,6 +347,8 @@ typedef struct { /* function definitions used in config.h */ static void clipcopy(const Arg *); 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 *); @@ -409,8 +424,8 @@ static void tputtab(int); static void tputc(Rune); static void treset(void); static void tresize(int, int); -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 tsetscroll(int, int); @@ -742,10 +757,10 @@ tlinelen(int y) { 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; @@ -807,7 +822,7 @@ selsnap(int *x, int *y, int direction) * 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; @@ -822,14 +837,14 @@ selsnap(int *x, int *y, int direction) 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))) @@ -850,14 +865,14 @@ selsnap(int *x, int *y, int direction) *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; } @@ -957,6 +972,7 @@ bpress(XEvent *e) { struct timespec now; MouseShortcut *ms; + MouseKey *mk; if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) { mousereport(e); @@ -971,6 +987,14 @@ bpress(XEvent *e) } } + for (mk = mkeys; mk < mkeys + LEN(mkeys); mk++) { + if (e->xbutton.button == mk->b + && match(mk->mask, e->xbutton.state)) { + mk->func(&mk->arg); + return; + } + } + if (e->xbutton.button == Button1) { clock_gettime(CLOCK_MONOTONIC, &now); @@ -1023,13 +1047,13 @@ getsel(void) } 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; @@ -1515,6 +1539,9 @@ ttyread(void) if (buflen > 0) memmove(buf, ptr, buflen); + if (term.scr > 0 && term.scr < histsize-1) + term.scr++; + return ret; } @@ -1524,6 +1551,9 @@ ttywrite(const char *s, size_t n) fd_set wfd, rfd; ssize_t r; size_t lim = 256; + Arg arg = (Arg) { .i = term.scr }; + + kscrolldown(&arg); /* * Remember that we are using a pty, which might be a modem line. @@ -1726,13 +1756,53 @@ 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, 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); @@ -1746,13 +1816,20 @@ tscrolldown(int orig, int n) } 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); @@ -1801,7 +1878,7 @@ tnewline(int first_col) int y = term.c.y; if (y == term.bot) { - tscrollup(term.top, 1); + tscrollup(term.top, 1, 1); } else { y++; } @@ -1966,14 +2043,14 @@ void 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 @@ -2407,11 +2484,11 @@ 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], 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); @@ -2947,7 +3024,7 @@ eschandle(uchar ascii) 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); } @@ -2960,7 +3037,7 @@ eschandle(uchar ascii) 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); } @@ -3147,7 +3224,7 @@ check_control_code: 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; @@ -3187,6 +3264,14 @@ tresize(int col, int row) 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; + term.hist[i][j].u = ' '; + } + } + /* resize each row to new width, zero-pad if needed */ for (i = 0; i < minrow; i++) { term.line[i] = xrealloc(term.line[i], col * sizeof(Glyph)); @@ -4114,11 +4199,11 @@ drawregion(int x1, int y1, int x2, int y2) term.dirty[y] = 0; specs = term.specbuf; - numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y); + numspecs = xmakeglyphfontspecs(specs, &TLINE(y)[x1], x2 - x1, x1, y); i = ox = 0; for (x = x1; x < x2 && i < numspecs; x++) { - new = term.line[y][x]; + new = TLINE(y)[x]; if (new.mode == ATTR_WDUMMY) continue; if (ena_sel && selected(x, y)) @@ -4138,7 +4223,9 @@ drawregion(int x1, int y1, int x2, int y2) if (i > 0) xdrawglyphfontspecs(specs, base, i, ox, y); } - xdrawcursor(); + + if (term.scr == 0) + xdrawcursor(); } void