Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>
#include <draw.h>

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;

        if(s == nil){
                s = "";
                sptr = nil;
        }else
                sptr = &s;
        if(r == nil){
                r = L"";
                rptr = nil;
        }else
                rptr = &r;
        twid = 0;
        while(len>0 && (*s || *r)){
                max = Max;
                if(len < max)
                        max = len;
                n = 0;
                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";
                                fprint(2, "stringwidth: bad character set for rune 0x%.4ux in %s\n", rune, name);
                                return twid;
                        }
                        if(subfontname){
                                if(_getsubfont(f->display, subfontname) == 0){
                                        def = f->display->defaultfont;
                                        if(def && f!=def)
                                                f = def;
                                        else
                                                break;
                                }
                        }
                }
                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);
}