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autowrap.go
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autowrap.go
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package console
import (
"bytes"
"strings"
)
const wrapingChars = " \n.,?;:/+=*-_°)(\"!@#"
type autoWraper struct {
maxWidth int
wrappingChar string
}
func (aw autoWraper) Wrap(input string) string {
wrappingChar := aw.wrappingChar
if wrappingChar == "" {
wrappingChar = " "
}
splits := strings.Split(input, wrappingChar)
var output bytes.Buffer
for i, split := range splits {
if len(split) <= aw.maxWidth {
output.WriteString(split)
} else {
var toWrite bytes.Buffer
var buff bytes.Buffer
for _, c := range split {
if toWrite.Len() != 0 {
if buff.Len()+toWrite.Len() >= aw.maxWidth {
output.WriteString(toWrite.String())
toWrite.Reset()
output.WriteString(wrappingChar)
}
}
if buff.Len() >= aw.maxWidth {
output.WriteString(buff.String())
buff.Reset()
output.WriteString(wrappingChar)
}
buff.WriteRune(c)
if strings.ContainsRune(wrapingChars, c) {
toWrite.WriteString(buff.String())
buff.Reset()
}
}
output.WriteString(toWrite.String())
output.WriteString(buff.String())
}
if i < len(splits)-1 {
output.WriteString(wrappingChar)
}
}
return output.String()
}