108 lines
2.0 KiB
C
108 lines
2.0 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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#include <u.h>
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#include <lib9.h>
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#include <draw.h>
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static Rune empty[] = { 0 };
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int
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_stringnwidth(Font *f, char *s, Rune *r, int len)
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{
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int wid, twid, n, max, l;
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char *name;
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enum { Max = 64 };
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uint16_t cbuf[Max];
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Rune rune, **rptr;
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char *subfontname, **sptr;
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Font *def;
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if(s == nil){
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s = "";
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sptr = nil;
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}else
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sptr = &s;
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if(r == nil){
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r = empty;
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rptr = nil;
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}else
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rptr = &r;
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twid = 0;
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while(len>0 && (*s || *r)){
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max = Max;
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if(len < max)
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max = len;
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n = 0;
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while((l = cachechars(f, sptr, rptr, cbuf, max, &wid, &subfontname)) <= 0){
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if(++n > 10){
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if(*r)
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rune = *r;
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else
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chartorune(&rune, s);
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if(f->name != nil)
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name = f->name;
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else
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name = "unnamed font";
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fprint(2, "stringwidth: bad character set for rune 0x%.4ux in %s\n", rune, name);
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return twid;
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}
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if(subfontname){
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if(_getsubfont(f->display, subfontname) == 0){
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def = f->display->defaultfont;
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if(def && f!=def)
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f = def;
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else
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break;
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}
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}
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}
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agefont(f);
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twid += wid;
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len -= l;
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}
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return twid;
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}
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int
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stringnwidth(Font *f, char *s, int len)
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{
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return _stringnwidth(f, s, nil, len);
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}
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int
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stringwidth(Font *f, char *s)
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{
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return _stringnwidth(f, s, nil, 1<<24);
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}
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Point
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stringsize(Font *f, char *s)
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{
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return Pt(_stringnwidth(f, s, nil, 1<<24), f->height);
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}
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int
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runestringnwidth(Font *f, Rune *r, int len)
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{
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return _stringnwidth(f, nil, r, len);
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}
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int
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runestringwidth(Font *f, Rune *r)
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{
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return _stringnwidth(f, nil, r, 1<<24);
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}
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Point
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runestringsize(Font *f, Rune *r)
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{
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return Pt(_stringnwidth(f, nil, r, 1<<24), f->height);
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}
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