int
entrytextwidth(Tk *tk, int n)
{
TkEntry *tke = TKobj(TkEntry, tk);
Rune c;
Font *f;
f = tk->env->font;
if (tke->show != nil) {
chartorune(&c, tke->show);
return n * runestringnwidth(f, &c, 1);
}
return runestringnwidth(f, tke->text, n);
}
int
wordsize(Rune *w, int nw)
{
if(nw < 0)
abort();
if(font)
return runestringnwidth(font, w, nw);
return nw;
}
int
xtofchar(Rune *s, Font *f, long p)
{
Rune *r;
int q;
if(p == 0)
return 0;
q = 0;
for(r=s; *r!=L'\0'; r++) {
p -= runestringnwidth(f, r, 1);
if(p < 0)
break;
q++;
}
return q;
}
void
center(Font *f, Point p, char *s, Image *color)
{
int i, n, dx;
Rune rbuf[32];
char sbuf[32*UTFmax+1];
dx = stringwidth(f, s);
if(dx > Facesize){
n = torune(rbuf, s, nelem(rbuf));
for(i=0; i<n; i++){
dx = runestringnwidth(f, rbuf, i+1);
if(dx > Facesize)
break;
}
sprint(sbuf, "%.*S", i, rbuf);
s = sbuf;
dx = stringwidth(f, s);
}
p.x += (Facesize-dx)/2;
string(screen, p, color, ZP, f, s);
}