Files
2026-08-20 18:47:29 -04:00

60 lines
1.0 KiB
Go

package styles
import (
"embed"
"io/fs"
"sort"
"strings"
"sync"
"github.com/alecthomas/chroma/v2"
)
//go:embed *.xml
var embedded embed.FS
// Registry of Styles, built on first use.
var Registry = sync.OnceValue(func() map[string]*chroma.Style {
registry := map[string]*chroma.Style{}
files, err := fs.ReadDir(embedded, ".")
if err != nil {
panic(err)
}
for _, file := range files {
r, err := embedded.Open(file.Name())
if err != nil {
panic(err)
}
style, err := chroma.NewXMLStyle(r)
if err != nil {
panic(err)
}
registry[strings.ToLower(style.Name)] = style
_ = r.Close()
}
return registry
})
// Fallback style.
func Fallback() *chroma.Style {
return Registry()["swapoff"]
}
// Names of all available styles.
func Names() []string {
out := []string{}
for name := range Registry() {
out = append(out, name)
}
sort.Strings(out)
return out
}
// Get named style, or Fallback.
func Get(name string) *chroma.Style {
if style, ok := Registry()[strings.ToLower(name)]; ok {
return style
}
return Fallback()
}