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// Copyright 2022 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package charset
import (
"bytes"
"io"
)
// BreakWriter wraps an io.Writer to always write '\n' as '<br>'
type BreakWriter struct {
io.Writer
}
// Write writes the provided byte slice transparently replacing '\n' with '<br>'
func (b *BreakWriter) Write(bs []byte) (n int, err error) {
pos := 0
for pos < len(bs) {
idx := bytes.IndexByte(bs[pos:], '\n')
if idx < 0 {
wn, err := b.Writer.Write(bs[pos:])
return n + wn, err
}
if idx > 0 {
wn, err := b.Writer.Write(bs[pos : pos+idx])
n += wn
if err != nil {
return n, err
}
}
if _, err = b.Writer.Write([]byte("<br>")); err != nil {
return n, err
}
pos += idx + 1
n++
}
return n, err
}
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