ref: eeb069251719e5c5e23c018f59ca8b158b3afb13
dir: /style/fonts_plan9.go/
//go:build plan9
package style
import (
"9fans.net/go/draw"
"fmt"
"github.com/psilva261/opossum/logger"
"io/fs"
"os"
"regexp"
"strings"
)
var (
fonts map[int]*draw.Font
fontHs []int
)
func initFontserver() {
if dui == nil {
// unit test
return
}
if df := dui.Font(nil); df.Height >= 40 {
dui.Display.DPI = 200
}
}
func initFonts() {
fonts = make(map[int]*draw.Font)
fontHs = make([]int, 0, 5)
if dui == nil {
// unit tests
return
}
def := dui.Display.Font.Name
ms, err := fontsLike(def)
if err != nil {
log.Errorf("find fonts: %v", err)
}
log.Infof("fonts in directory: %+v\n", ms)
for _, m := range ms {
f, err := dui.Display.OpenFont(m)
if err != nil {
log.Errorf("open font: %v", err)
continue
}
fonts[f.Height] = f
fontHs = append(fontHs, f.Height)
}
log.Infof("font heights: %+v", fontHs)
}
var reNum = regexp.MustCompile(`(\d+(x\d+)?)`)
func fontId(fn string) string {
return reNum.ReplaceAllString(fn, "")
}
func fontsLike(path string) (fts []string, err error) {
fts = make([]string, 0, 5)
if path == "*default*" {
log.Infof("use default font")
path = "/lib/font/bit/lucidasans/unicode.13.font"
}
l := strings.Split(path, "/")
dn := strings.Join(l[:len(l)-1], "/")
fn := l[len(l)-1]
dir := os.DirFS(dn)
ms, err := fs.Glob(dir, "*.font")
if err != nil {
return
}
log.Infof("fonts in directory: %+v\n", ms)
for _, m := range ms {
if fontId(fn) != fontId(m) {
continue
}
log.Infof("add font %v\n", m)
fts = append(fts, dn+"/"+m)
}
if len(fts) == 0 {
return nil, fmt.Errorf("unable to find fonts in %v", dn)
}
return
}
func (cs Map) FontFilename() (fn string, ok bool) {
if fonts == nil {
initFonts()
}
h := matchClosestFontSize(2*cs.FontSize(), fontHs)
f, ok := fonts[h]
if !ok {
return
}
return f.Name, true
}