st

Personal fork of ST from suckless.org; st is a simple terminal implementation for X.
git clone git://git.swab.dev/st.git
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commit 9b74fcadc46ee78b38b20e9663c6924cd9df7e84
parent d581bfccd7c2987e12809383d8ce1f833529b715
Author: Aurélien Aptel <aurelien.aptel@gmail.com>
Date:   Thu, 18 Nov 2010 01:00:04 +0100

utf8 support! print text in delicious unicode greatness! all hail to the glorious Damian Okrasa for the patch!

TERM set back to xterm.
changed default fonts.
Note: drawing is now (even) slower.
Diffstat:
Mconfig.def.h | 29+++--------------------------
Mst.c | 322+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----------------
2 files changed, 260 insertions(+), 91 deletions(-)

diff --git a/config.def.h b/config.def.h @@ -1,7 +1,7 @@ #define TAB 8 -#define TNAME "st-256color" -#define FONT "-misc-*-medium-r-semicondensed-*-13-*-*-*-*-*-iso8859-*" -#define BOLDFONT "-misc-*-bold-r-semicondensed-*-13-*-*-*-*-*-iso8859-*" +#define TNAME "xterm" +#define FONT "-*-*-medium-r-*-*-*-120-75-75-*-60-*-*" +#define BOLDFONT "-*-*-bold-r-*-*-*-120-75-75-*-60-*-*" #define BORDER 2 #define SHELL "/bin/sh" @@ -55,31 +55,8 @@ static Key key[] = { /* Line drawing characters (sometime specific to each font...) */ static char gfx[] = { - ['`'] = 0x01, - ['a'] = 0x02, ['f'] = 'o', ['g'] = '+', ['i'] = '#', - ['j'] = 0x0B, - ['k'] = 0x0C, - ['l'] = 0x0D, - ['m'] = 0x0E, - ['n'] = 0x0F, - ['o'] = 0x10, - ['p'] = 0x11, - ['q'] = 0x12, - ['r'] = 0x13, - ['s'] = 0x14, - ['t'] = 0x15, - ['u'] = 0x16, - ['v'] = 0x17, - ['w'] = 0x18, - ['x'] = 0x19, - ['y'] = 0x1A, - ['z'] = 0x1B, - ['{'] = 0x1C, - ['|'] = 0x1D, - ['}'] = 0x1E, - ['~'] = 0x1F, [255] = 0, }; diff --git a/st.c b/st.c @@ -38,6 +38,7 @@ #define ESC_BUF_SIZ 256 #define ESC_ARG_SIZ 16 #define DRAW_BUF_SIZ 1024 +#define UTF_SIZ 4 #define SERRNO strerror(errno) #define MIN(a, b) ((a) < (b) ? (a) : (b)) @@ -61,8 +62,11 @@ enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 }; enum { SCREEN_UPDATE, SCREEN_REDRAW }; enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 }; +#undef B0 +enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 }; + typedef struct { - char c; /* character code */ + char c[UTF_SIZ]; /* character code */ char mode; /* attribute flags */ int fg; /* foreground */ int bg; /* background */ @@ -127,11 +131,19 @@ typedef struct { char s[ESC_BUF_SIZ]; } Key; +typedef struct { + XFontSet fs; + short lbearing; + short rbearing; + int ascent; + int descent; +} FontInfo; + /* Drawing Context */ typedef struct { unsigned long col[256]; - XFontStruct* font; - XFontStruct* bfont; + FontInfo font; + FontInfo bfont; GC gc; } DC; @@ -167,14 +179,13 @@ static void tmoveto(int, int); static void tnew(int, int); static void tnewline(int); static void tputtab(void); -static void tputc(char); -static void tputs(char*, int); +static void tputc(char*); static void treset(void); static int tresize(int, int); static void tscrollup(int, int); static void tscrolldown(int, int); static void tsetattr(int*, int); -static void tsetchar(char); +static void tsetchar(char*); static void tsetscroll(int, int); static void tswapscreen(void); @@ -183,7 +194,7 @@ static void ttyread(void); static void ttyresize(int, int); static void ttywrite(const char *, size_t); -static void xdraws(char *, Glyph, int, int, int); +static void xdraws(char *, Glyph, int, int, int, int); static void xhints(void); static void xclear(int, int, int, int); static void xdrawcursor(void); @@ -205,6 +216,11 @@ static void bmotion(XEvent *); static void selection_notify(XEvent *); static void selection_request(XEvent *); +static int stou(char *, long *); +static int utos(long *, char *); +static int slen(char *); +static int canstou(char *, int); + static void (*handler[LASTEvent])(XEvent *) = { [KeyPress] = kpress, [ConfigureNotify] = resize, @@ -231,6 +247,133 @@ static Selection sel; static char *opt_cmd = NULL; static char *opt_title = NULL; +/* UTF-8 decode */ +static int +stou(char *s, long *u) +{ + unsigned char c; + int i, n, rtn; + + rtn = 1; + c = *s; + if(~c&B7) { /* 0xxxxxxx */ + *u = c; + return rtn; + } else if ((c&(B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */ + *u = c&(B4|B3|B2|B1|B0); + n = 1; + } else if ((c&(B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */ + *u = c&(B3|B2|B1|B0); + n = 2; + } else if ((c&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */ + *u = c&(B2|B1|B0); + n = 3; + } else + goto invalid; + for (i=n,++s; i>0; --i,++rtn,++s) { + c = *s; + if ((c&(B7|B6)) != B7) /* 10xxxxxx */ + goto invalid; + *u <<= 6; + *u |= c&(B5|B4|B3|B2|B1|B0); + } + if ((n == 1 && *u < 0x80) || + (n == 2 && *u < 0x800) || + (n == 3 && *u < 0x10000) || + (*u >= 0xD800 && *u <= 0xDFFF)) + goto invalid; + return rtn; +invalid: + *u = 0xFFFD; + return rtn; +} + +/* UTF-8 encode */ +static int +utos(long *u, char *s) +{ + unsigned char *sp; + unsigned long uc; + int i, n; + + sp = (unsigned char*) s; + uc = *u; + if (uc < 0x80) { + *sp = uc; /* 0xxxxxxx */ + return 1; + } else if (*u < 0x800) { + *sp = (uc >> 6) | (B7|B6); /* 110xxxxx */ + n = 1; + } else if (uc < 0x10000) { + *sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */ + n = 2; + } else if (uc <= 0x10FFFF) { + *sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */ + n = 3; + } else { + goto invalid; + } + for (i=n,++sp; i>0; --i,++sp) + *sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */ + return n+1; +invalid: + /* U+FFFD */ + *s++ = '\xEF'; + *s++ = '\xBF'; + *s = '\xBD'; + return 3; +} + +/* + * use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode UTF-8 + * otherwise return 0 + */ +static int +canstou(char *s, int b) +{ + unsigned char c; + int n; + + c = *s; + if (b < 1) + return 0; + else if (~c&B7) + return 1; + else if ((c&(B7|B6|B5)) == (B7|B6)) + n = 1; + else if ((c&(B7|B6|B5|B4)) == (B7|B6|B5)) + n = 2; + else if ((c&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) + n = 3; + else + return 1; + for (--b,++s; n>0&&b>0; --n,--b,++s) { + c = *s; + if ((c&(B7|B6)) != B7) + break; + } + if (n > 0 && b == 0) + return 0; + else + return 1; +} + +static int +slen(char *s) +{ + unsigned char c; + + c = *s; + if (~c&B7) + return 1; + else if ((c&(B7|B6|B5)) == (B7|B6)) + return 2; + else if ((c&(B7|B6|B5|B4)) == (B7|B6|B5)) + return 3; + else + return 4; +} + void selinit(void) { sel.mode = 0; @@ -268,15 +411,18 @@ static void bpress(XEvent *e) { static char *getseltext() { char *str, *ptr; - int ls, x, y, sz; + int ls, x, y, sz, sl; if(sel.bx == -1) return NULL; - sz = (term.col+1) * (sel.e.y-sel.b.y+1); + sz = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ; ptr = str = malloc(sz); for(y = 0; y < term.row; y++) { for(x = 0; x < term.col; x++) - if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y))) - *ptr = term.line[y][x].c, ptr++; + if(term.line[y][x].state & GLYPH_SET && (ls = selected(x, y))) { + sl = slen(term.line[y][x].c); + memcpy(ptr, term.line[y][x].c, sl); + ptr += sl; + } if(ls) *ptr = '\n', ptr++; } @@ -476,13 +622,24 @@ dump(char c) { void ttyread(void) { - char buf[BUFSIZ]; - int ret; + char buf[BUFSIZ], *ptr; + char s[UTF_SIZ]; + int ret, br; + static int buflen = 0; + long u; - if((ret = read(cmdfd, buf, LEN(buf))) < 0) + if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0) die("Couldn't read from shell: %s\n", SERRNO); - else - tputs(buf, ret); + else { + buflen += ret; + for(ptr=buf; buflen>=UTF_SIZ||canstou(ptr,buflen); buflen-=br) { + br = stou(ptr, &u); + utos(&u, s); + tputc(s); + ptr += br; + } + memcpy(buf, ptr, buflen); + } } void @@ -622,9 +779,9 @@ tmoveto(int x, int y) { } void -tsetchar(char c) { +tsetchar(char *c) { term.line[term.c.y][term.c.x] = term.c.attr; - term.line[term.c.y][term.c.x].c = c; + memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ); term.line[term.c.y][term.c.x].state |= GLYPH_SET; } @@ -1025,30 +1182,31 @@ tputtab(void) { } void -tputc(char c) { +tputc(char *c) { + char ascii = *c; if(term.esc & ESC_START) { if(term.esc & ESC_CSI) { - escseq.buf[escseq.len++] = c; - if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) { + escseq.buf[escseq.len++] = ascii; + if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) { term.esc = 0; csiparse(), csihandle(); } /* TODO: handle other OSC */ } else if(term.esc & ESC_OSC) { - if(c == ';') { + if(ascii == ';') { term.titlelen = 0; term.esc = ESC_START | ESC_TITLE; } } else if(term.esc & ESC_TITLE) { - if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) { + if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) { term.esc = 0; term.title[term.titlelen] = '\0'; XStoreName(xw.dis, xw.win, term.title); } else { - term.title[term.titlelen++] = c; + term.title[term.titlelen++] = ascii; } } else if(term.esc & ESC_ALTCHARSET) { - switch(c) { + switch(ascii) { case '0': /* Line drawing crap */ term.c.attr.mode |= ATTR_GFX; break; @@ -1056,11 +1214,11 @@ tputc(char c) { term.c.attr.mode &= ~ATTR_GFX; break; default: - printf("esc unhandled charset: ESC ( %c\n", c); + printf("esc unhandled charset: ESC ( %c\n", ascii); } term.esc = 0; } else { - switch(c) { + switch(ascii) { case '[': term.esc |= ESC_CSI; break; @@ -1109,12 +1267,13 @@ tputc(char c) { term.esc = 0; break; default: - fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.'); + fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", + (unsigned char) ascii, isprint(ascii)?ascii:'.'); term.esc = 0; } } } else { - switch(c) { + switch(ascii) { case '\t': tputtab(); break; @@ -1151,12 +1310,6 @@ tputc(char c) { } } -void -tputs(char *s, int len) { - for(; len > 0; len--) - tputc(*s++); -} - int tresize(int col, int row) { int i, x; @@ -1309,20 +1462,52 @@ xhints(void) } void +xsetfontinfo(FontInfo *fi) +{ + XFontStruct **xfonts; + int fnum; + int i; + char **fontnames; + + fi->lbearing = 0; + fi->rbearing = 0; + fi->ascent = 0; + fi->descent = 0; + fnum = XFontsOfFontSet(fi->fs, &xfonts, &fontnames); + for(i=0; i<fnum; i++,xfonts++,fontnames++) { + puts(*fontnames); + if(fi->ascent < (*xfonts)->ascent) + fi->ascent = (*xfonts)->ascent; + if(fi->descent < (*xfonts)->descent) + fi->descent = (*xfonts)->descent; + if(fi->rbearing < (*xfonts)->max_bounds.rbearing) + fi->rbearing = (*xfonts)->max_bounds.rbearing; + if(fi->lbearing < (*xfonts)->min_bounds.lbearing) + fi->lbearing = (*xfonts)->min_bounds.lbearing; + } +} + +void xinit(void) { XSetWindowAttributes attrs; + char **mc; + char *ds; + int nmc; if(!(xw.dis = XOpenDisplay(NULL))) die("Can't open display\n"); xw.scr = XDefaultScreen(xw.dis); /* font */ - if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT))) - die("Can't load font %s\n", dc.font ? BOLDFONT : FONT); + if ((dc.font.fs = XCreateFontSet(xw.dis, FONT, &mc, &nmc, &ds)) == NULL || + (dc.bfont.fs = XCreateFontSet(xw.dis, BOLDFONT, &mc, &nmc, &ds)) == NULL) + die("Can't load font %s\n", dc.font.fs ? BOLDFONT : FONT); + xsetfontinfo(&dc.font); + xsetfontinfo(&dc.bfont); /* XXX: Assuming same size for bold font */ - xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing; - xw.ch = dc.font->ascent + dc.font->descent; + xw.cw = dc.font.rbearing - dc.font.lbearing; + xw.ch = dc.font.ascent + dc.font.descent; /* colors */ xw.cmap = XDefaultColormap(xw.dis, xw.scr); @@ -1366,9 +1551,9 @@ xinit(void) { } void -xdraws(char *s, Glyph base, int x, int y, int len) { +xdraws(char *s, Glyph base, int x, int y, int cl, int sl) { unsigned long xfg, xbg; - int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw; + int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = cl*xw.cw; int i; if(base.mode & ATTR_REVERSE) @@ -1378,9 +1563,9 @@ xdraws(char *s, Glyph base, int x, int y, int len) { XSetBackground(xw.dis, dc.gc, xbg); XSetForeground(xw.dis, dc.gc, xfg); - + if(base.mode & ATTR_GFX) - for(i = 0; i < len; i++) { + for(i = 0; i < cl; i++) { char c = gfx[(unsigned int)s[i] % 256]; if(c) s[i] = c; @@ -1388,8 +1573,8 @@ xdraws(char *s, Glyph base, int x, int y, int len) { s[i] -= 0x5f; } - XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid); - XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len); + XmbDrawImageString(xw.dis, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.fs : dc.font.fs, + dc.gc, winx, winy, s, sl); if(base.mode & ATTR_UNDERLINE) XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1); @@ -1399,23 +1584,26 @@ void xdrawcursor(void) { static int oldx = 0; static int oldy = 0; - Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0}; + int sl; + Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0}; LIMIT(oldx, 0, term.col-1); LIMIT(oldy, 0, term.row-1); if(term.line[term.c.y][term.c.x].state & GLYPH_SET) - g.c = term.line[term.c.y][term.c.x].c; - + memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ); + /* remove the old cursor */ - if(term.line[oldy][oldx].state & GLYPH_SET) - xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1); - else + if(term.line[oldy][oldx].state & GLYPH_SET) { + sl = slen(term.line[oldy][oldx].c); + xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl); + } else xclear(oldx, oldy, oldx, oldy); /* draw the new one */ if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) { - xdraws(&g.c, g, term.c.x, term.c.y, 1); + sl = slen(g.c); + xdraws(g.c, g, term.c.x, term.c.y, 1, sl); oldx = term.c.x, oldy = term.c.y; } } @@ -1424,11 +1612,12 @@ xdrawcursor(void) { /* basic drawing routines */ void xdrawc(int x, int y, Glyph g) { + int sl = slen(g.c); XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch }; XSetBackground(xw.dis, dc.gc, dc.col[g.bg]); XSetForeground(xw.dis, dc.gc, dc.col[g.fg]); - XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid); - XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1); + XmbDrawImageString(xw.dis, xw.buf, g.mode&ATTR_BOLD?dc.bfont.fs:dc.font.fs, + dc.gc, r.x, r.y+dc.font.ascent, g.c, sl); } void @@ -1450,7 +1639,7 @@ draw(int dummy) { /* optimized drawing routine */ void draw(int redraw_all) { - int i, x, y, ox; + int ic, ib, x, y, ox, sl; Glyph base, new; char buf[DRAW_BUF_SIZ]; @@ -1460,26 +1649,29 @@ draw(int redraw_all) { xclear(0, 0, term.col-1, term.row-1); for(y = 0; y < term.row; y++) { base = term.line[y][0]; - i = ox = 0; + ic = ib = ox = 0; for(x = 0; x < term.col; x++) { new = term.line[y][x]; - if(sel.bx!=-1 && new.c && selected(x, y)) + if(sel.bx!=-1 && *(new.c) && selected(x, y)) new.mode ^= ATTR_REVERSE; - if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) || - i >= DRAW_BUF_SIZ)) { - xdraws(buf, base, ox, y, i); - i = 0; + if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) || + ib >= DRAW_BUF_SIZ-UTF_SIZ)) { + xdraws(buf, base, ox, y, ic, ib); + ic = ib = 0; } if(new.state & GLYPH_SET) { - if(i == 0) { + if(ib == 0) { ox = x; base = new; } - buf[i++] = new.c; + sl = slen(new.c); + memcpy(buf+ib, new.c, sl); + ib += sl; + ++ic; } } - if(i > 0) - xdraws(buf, base, ox, y, i); + if(ib > 0) + xdraws(buf, base, ox, y, ic, ib); } xdrawcursor(); XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);