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#include <u.h>
#include <libc.h>
#include <draw.h>
static Rune empty[] = { 0 };
int
_stringnwidth(Font *f, char *s, Rune *r, int len)
{
int wid, twid, n, max, l;
char *name;
enum { Max = 64 };
ushort cbuf[Max];
Rune rune, **rptr;
char *subfontname, **sptr;
Font *def;
Subfont *sf;
if(s == nil){
s = "";
sptr = nil;
}else
sptr = &s;
if(r == nil){
r = empty;
rptr = nil;
}else
rptr = &r;
twid = 0;
while(len>0 && (*s || *r)){
max = Max;
if(len < max)
max = len;
n = 0;
sf = nil;
while((l = cachechars(f, sptr, rptr, cbuf, max, &wid, &subfontname)) <= 0){
if(++n > 10){
if(*r)
rune = *r;
else
chartorune(&rune, s);
if(f->name != nil)
name = f->name;
else
name = "unnamed font";
freesubfont(sf);
fprint(2, "stringwidth: bad character set for rune 0x%.4ux in %s\n", rune, name);
return twid;
}
if(subfontname){
freesubfont(sf);
if((sf=_getsubfont(f->display, subfontname)) == 0){
def = f->display ? f->display->defaultfont : nil;
if(def && f!=def)
f = def;
else
break;
}
/*
* must not free sf until cachechars has found it in the cache
* and picked up its own reference.
*/
}
}
freesubfont(sf);
agefont(f);
twid += wid;
len -= l;
}
return twid;
}
int
stringnwidth(Font *f, char *s, int len)
{
return _stringnwidth(f, s, nil, len);
}
int
stringwidth(Font *f, char *s)
{
return _stringnwidth(f, s, nil, 1<<24);
}
Point
stringsize(Font *f, char *s)
{
return Pt(_stringnwidth(f, s, nil, 1<<24), f->height);
}
int
runestringnwidth(Font *f, Rune *r, int len)
{
return _stringnwidth(f, nil, r, len);
}
int
runestringwidth(Font *f, Rune *r)
{
return _stringnwidth(f, nil, r, 1<<24);
}
Point
runestringsize(Font *f, Rune *r)
{
return Pt(_stringnwidth(f, nil, r, 1<<24), f->height);
}
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