cleanup & bugfix in xdraws(). - st - simple terminal
HTML git clone https://git.parazyd.org/st
DIR Log
DIR Files
DIR Refs
DIR README
DIR LICENSE
---
DIR commit b61925b5d6fd8af0ad0ccc922db60dff1746cfe2
DIR parent 81a048d6cfda84a06353911130fee029df077c8d
HTML Author: Aurélien Aptel <aurelien.aptel@gmail.com>
Date: Sat, 20 Nov 2010 22:24:04 +0100
cleanup & bugfix in xdraws().
Diffstat:
M st.c | 251 +++++++++++++++----------------
1 file changed, 125 insertions(+), 126 deletions(-)
---
DIR diff --git a/st.c b/st.c
@@ -131,20 +131,17 @@ 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];
- FontInfo font;
- FontInfo bfont;
GC gc;
+ struct {
+ int ascent;
+ int descent;
+ short lbearing;
+ short rbearing;
+ XFontSet set;
+ } font, bfont;
} DC;
/* TODO: use better name for vars... */
@@ -222,10 +219,10 @@ static inline int selected(int, int);
static void selcopy(void);
static void selpaste(void);
-static int stou(char *, long *);
-static int utos(long *, char *);
-static int slen(char *);
-static int canstou(char *, int);
+static int utf8decode(char *, long *);
+static int utf8encode(long *, char *);
+static int utf8size(char *);
+static int isfullutf8(char *, int);
static void (*handler[LASTEvent])(XEvent *) = {
[KeyPress] = kpress,
@@ -254,8 +251,8 @@ static char *opt_cmd = NULL;
static char *opt_title = NULL;
static char *opt_class = NULL;
-/* UTF-8 decode */
-static int stou(char *s, long *u) {
+int
+utf8decode(char *s, long *u) {
unsigned char c;
int i, n, rtn;
@@ -264,28 +261,28 @@ static int stou(char *s, long *u) {
if(~c&B7) { /* 0xxxxxxx */
*u = c;
return rtn;
- } else if ((c&(B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
+ } 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 */
+ } 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 */
+ } 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) {
+ for(i=n,++s; i>0; --i,++rtn,++s) {
c = *s;
- if ((c&(B7|B6)) != B7) /* 10xxxxxx */
+ 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))
+ if((n == 1 && *u < 0x80) ||
+ (n == 2 && *u < 0x800) ||
+ (n == 3 && *u < 0x10000) ||
+ (*u >= 0xD800 && *u <= 0xDFFF))
goto invalid;
return rtn;
invalid:
@@ -293,30 +290,30 @@ invalid:
return rtn;
}
-/* UTF-8 encode */
-static int utos(long *u, char *s) {
+int
+utf8encode(long *u, char *s) {
unsigned char *sp;
unsigned long uc;
int i, n;
sp = (unsigned char*) s;
uc = *u;
- if (uc < 0x80) {
+ if(uc < 0x80) {
*sp = uc; /* 0xxxxxxx */
return 1;
- } else if (*u < 0x800) {
+ } else if(*u < 0x800) {
*sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
n = 1;
- } else if (uc < 0x10000) {
+ } else if(uc < 0x10000) {
*sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
n = 2;
- } else if (uc <= 0x10FFFF) {
+ } 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)
+ 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:
@@ -329,34 +326,32 @@ invalid:
/* 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 = *s;
- int n;
+int
+isfullutf8(char *s, int b) {
+ unsigned char *c1, *c2, *c3;
- if (b < 1)
+ c1 = (unsigned char *) s;
+ c2 = (unsigned char *) ++s;
+ c3 = (unsigned char *) ++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)
+ else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
+ return 0;
+ else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
+ ((b == 1) ||
+ ((b == 2) && (*c2&(B7|B6)) == B7)))
+ return 0;
+ else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
+ ((b == 1) ||
+ ((b == 2) && (*c2&(B7|B6)) == B7) ||
+ ((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
return 0;
else
return 1;
}
-static int slen(char *s) {
+int
+utf8size(char *s) {
unsigned char c = *s;
if (~c&B7)
@@ -369,13 +364,15 @@ static int slen(char *s) {
return 4;
}
-static void selinit(void) {
+void
+selinit(void) {
sel.mode = 0;
sel.bx = -1;
sel.clip = NULL;
}
-static inline int selected(int x, int y) {
+static inline int
+selected(int x, int y) {
if(sel.ey == y && sel.by == y) {
int bx = MIN(sel.bx, sel.ex);
int ex = MAX(sel.bx, sel.ex);
@@ -385,7 +382,8 @@ static inline int selected(int x, int y) {
|| (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
}
-static void getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
+void
+getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
if(b)
*b = e->xbutton.button;
@@ -397,13 +395,15 @@ static void getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
sel.e.y = MAX(sel.by, sel.ey);
}
-static void bpress(XEvent *e) {
+void
+bpress(XEvent *e) {
sel.mode = 1;
sel.ex = sel.bx = e->xbutton.x/xw.cw;
sel.ey = sel.by = e->xbutton.y/xw.ch;
}
-static void selcopy() {
+void
+selcopy(void) {
char *str, *ptr;
int ls, x, y, sz, sl;
@@ -415,7 +415,7 @@ static void selcopy() {
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))) {
- sl = slen(term.line[y][x].c);
+ sl = utf8size(term.line[y][x].c);
memcpy(ptr, term.line[y][x].c, sl);
ptr += sl;
}
@@ -427,7 +427,8 @@ static void selcopy() {
xsetsel(str);
}
-static void selnotify(XEvent *e) {
+void
+selnotify(XEvent *e) {
unsigned long nitems;
unsigned long ofs, rem;
int format;
@@ -449,12 +450,13 @@ static void selnotify(XEvent *e) {
} while(rem > 0);
}
-static void selpaste() {
+void
+selpaste() {
XConvertSelection(xw.dis, XA_PRIMARY, XA_STRING, XA_PRIMARY, xw.win, CurrentTime);
}
-static void selrequest(XEvent *e)
-{
+void
+selrequest(XEvent *e) {
XSelectionRequestEvent *xsre;
XSelectionEvent xev;
Atom xa_targets;
@@ -488,7 +490,8 @@ static void selrequest(XEvent *e)
fprintf(stderr, "Error sending SelectionNotify event\n");
}
-static void xsetsel(char *str) {
+void
+xsetsel(char *str) {
/* register the selection for both the clipboard and the primary */
Atom clipboard;
@@ -504,7 +507,8 @@ static void xsetsel(char *str) {
}
/* TODO: doubleclick to select word */
-static void brelease(XEvent *e) {
+void
+brelease(XEvent *e) {
int b;
sel.mode = 0;
getbuttoninfo(e, &b, &sel.ex, &sel.ey);
@@ -519,7 +523,8 @@ static void brelease(XEvent *e) {
draw(1);
}
-static void bmotion(XEvent *e) {
+void
+bmotion(XEvent *e) {
if (sel.mode) {
getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
/* XXX: draw() can't keep up, disabled for now.
@@ -528,26 +533,6 @@ static void bmotion(XEvent *e) {
}
}
-#ifdef DEBUG
-void
-tdump(void) {
- int row, col;
- Glyph c;
-
- for(row = 0; row < term.row; row++) {
- for(col = 0; col < term.col; col++) {
- if(col == term.c.x && row == term.c.y)
- putchar('#');
- else {
- c = term.line[row][col];
- putchar(c.state & GLYPH_SET ? c.c : '.');
- }
- }
- putchar('\n');
- }
-}
-#endif
-
void
die(const char *errstr, ...) {
va_list ap;
@@ -631,9 +616,9 @@ ttyread(void) {
die("Couldn't read from shell: %s\n", SERRNO);
else {
buflen += ret;
- for(ptr=buf; buflen>=UTF_SIZ||canstou(ptr,buflen); buflen-=br) {
- br = stou(ptr, &u);
- utos(&u, s);
+ for(ptr=buf; buflen>=UTF_SIZ||isfullutf8(ptr,buflen); buflen-=br) {
+ br = utf8decode(ptr, &u);
+ utf8encode(&u, s);
tputc(s);
ptr += br;
}
@@ -1460,49 +1445,63 @@ xhints(void)
XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
}
+XFontSet
+xinitfont(char *fontstr)
+{
+ XFontSet set;
+ char *def, **missing;
+ int n;
+
+ missing = NULL;
+ set = XCreateFontSet(xw.dis, fontstr, &missing, &n, &def);
+ if(missing) {
+ while(n--)
+ fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
+ XFreeStringList(missing);
+ }
+ return set;
+}
+
void
-xsetfontinfo(FontInfo *fi)
+xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing)
{
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;
+ char **font_names;
+ int i, n;
+
+ *ascent = *descent = *lbearing = *rbearing = 0;
+ n = XFontsOfFontSet(set, &xfonts, &font_names);
+ for(i = 0; i < n; i++) {
+ *ascent = MAX(*ascent, (*xfonts)->ascent);
+ *descent = MAX(*descent, (*xfonts)->descent);
+ *lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
+ *rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
+ xfonts++;
}
}
void
+initfonts(char *fontstr, char *bfontstr)
+{
+ if((dc.font.set = xinitfont(fontstr)) == NULL ||
+ (dc.bfont.set = xinitfont(bfontstr)) == NULL)
+ die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
+ xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
+ &dc.font.lbearing, &dc.font.rbearing);
+ xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
+ &dc.bfont.lbearing, &dc.bfont.rbearing);
+}
+
+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.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);
+ initfonts(FONT, BOLDFONT);
/* XXX: Assuming same size for bold font */
xw.cw = dc.font.rbearing - dc.font.lbearing;
@@ -1550,9 +1549,9 @@ xinit(void) {
}
void
-xdraws(char *s, Glyph base, int x, int y, int cl, int sl) {
+xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
unsigned long xfg, xbg;
- int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = cl*xw.cw;
+ int winx = x*xw.cw, winy = y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
int i;
if(base.mode & ATTR_REVERSE)
@@ -1564,7 +1563,7 @@ xdraws(char *s, Glyph base, int x, int y, int cl, int sl) {
XSetForeground(xw.dis, dc.gc, xfg);
if(base.mode & ATTR_GFX)
- for(i = 0; i < cl; i++) {
+ for(i = 0; i < bytelen; i++) {
char c = gfx[(unsigned int)s[i] % 256];
if(c)
s[i] = c;
@@ -1572,8 +1571,8 @@ xdraws(char *s, Glyph base, int x, int y, int cl, int sl) {
s[i] -= 0x5f;
}
- XmbDrawImageString(xw.dis, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.fs : dc.font.fs,
- dc.gc, winx, winy, s, sl);
+ XmbDrawImageString(xw.dis, xw.buf, base.mode & ATTR_BOLD ? dc.bfont.set : dc.font.set,
+ dc.gc, winx, winy, s, bytelen);
if(base.mode & ATTR_UNDERLINE)
XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
@@ -1594,14 +1593,14 @@ xdrawcursor(void) {
/* remove the old cursor */
if(term.line[oldy][oldx].state & GLYPH_SET) {
- sl = slen(term.line[oldy][oldx].c);
+ sl = utf8size(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)) {
- sl = slen(g.c);
+ sl = utf8size(g.c);
xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
oldx = term.c.x, oldy = term.c.y;
}
@@ -1611,7 +1610,7 @@ xdrawcursor(void) {
/* basic drawing routines */
void
xdrawc(int x, int y, Glyph g) {
- int sl = slen(g.c);
+ int sl = utf8size(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]);
@@ -1663,7 +1662,7 @@ draw(int redraw_all) {
ox = x;
base = new;
}
- sl = slen(new.c);
+ sl = utf8size(new.c);
memcpy(buf+ib, new.c, sl);
ib += sl;
++ic;