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package colorable
import (
"bytes"
"io"
)
// NonColorable hold writer but remove escape sequence.
type NonColorable struct {
out io.Writer
}
// NewNonColorable return new instance of Writer which remove escape sequence from Writer.
func NewNonColorable(w io.Writer) io.Writer {
return &NonColorable{out: w}
}
// Write write data on console
func (w *NonColorable) Write(data []byte) (n int, err error) {
er := bytes.NewReader(data)
var bw [1]byte
loop:
for {
c1, err := er.ReadByte()
if err != nil {
break loop
}
if c1 != 0x1b {
bw[0] = c1
w.out.Write(bw[:])
continue
}
c2, err := er.ReadByte()
if err != nil {
break loop
}
if c2 != 0x5b {
continue
}
var buf bytes.Buffer
for {
c, err := er.ReadByte()
if err != nil {
break loop
}
if ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || c == '@' {
break
}
buf.Write([]byte(string(c)))
}
}
return len(data), nil
}
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