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renderer.go
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renderer.go
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package font
import (
"bytes"
"fmt"
"sort"
"qlova.org/seed"
"qlova.org/seed/use/css"
)
type harvester struct {
fonts map[string]Font
}
func newHarvester() harvester {
return harvester{
make(map[string]Font),
}
}
func (h harvester) harvest(c seed.Seed) map[string]Font {
var data data
c.Load(&data)
for _, font := range data.fonts {
h.fonts[font.name] = font
}
for _, child := range c.Children() {
h.harvest(child)
}
return h.fonts
}
func init() {
css.RegisterRenderer(func(c seed.Seed) []byte {
var harvested = newHarvester().harvest(c)
var b bytes.Buffer
//Deterministic render.
keys := make([]string, 0, len(harvested))
for i := range harvested {
keys = append(keys, i)
}
sort.Strings(keys)
for _, key := range keys {
font := harvested[key]
fmt.Fprint(&b, `@font-face {`)
b.Write(font.Bytes())
fmt.Fprint(&b, `}`)
}
return b.Bytes()
})
}