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chroma/formatters/tty_truecolour.go
Alec Thomas d5083b3f7c Big changes to the style and colour APIs.
- Styles now use a builder system, to enforce immutability of styles.
- Corrected and cleaned up how style inheritance works.
- Added a brightening function to colours
- HTML formatter will now automatically pick line and highlight colours
  if they are not provided in the style. This is done by slightly
  darkening or lightening.

Fixes #21.
2017-09-23 22:09:46 +10:00

39 lines
963 B
Go

package formatters
import (
"fmt"
"io"
"github.com/alecthomas/chroma"
)
// TTY16m is a true-colour terminal formatter.
var TTY16m = Register("terminal16m", chroma.FormatterFunc(trueColourFormatter))
func trueColourFormatter(w io.Writer, style *chroma.Style, it chroma.Iterator) error {
for token := it(); token != nil; token = it() {
entry := style.Get(token.Type)
if !entry.IsZero() {
out := ""
if entry.Bold == chroma.Yes {
out += "\033[1m"
}
if entry.Underline == chroma.Yes {
out += "\033[4m"
}
if entry.Colour.IsSet() {
out += fmt.Sprintf("\033[38:2:%d:%d:%dm", entry.Colour.Red(), entry.Colour.Green(), entry.Colour.Blue())
}
if entry.Background.IsSet() {
out += fmt.Sprintf("\033[48:2:%d:%d:%dm", entry.Background.Red(), entry.Background.Green(), entry.Background.Blue())
}
fmt.Fprint(w, out)
}
fmt.Fprint(w, token.Value)
if !entry.IsZero() {
fmt.Fprint(w, "\033[0m")
}
}
return nil
}