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// Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package util
import (
"strings"
"unicode/utf8"
)
// in UTF8 "…" is 3 bytes so doesn't really gain us anything...
const (
utf8Ellipsis = "…"
asciiEllipsis = "..."
)
// SplitStringAtByteN splits a string at byte n accounting for rune boundaries. (Combining characters are not accounted for.)
func SplitStringAtByteN(input string, n int) (left, right string) {
if len(input) <= n {
return input, ""
}
if !utf8.ValidString(input) {
if n-3 < 0 {
return input, ""
}
return input[:n-3] + asciiEllipsis, asciiEllipsis + input[n-3:]
}
end := 0
for end <= n-3 {
_, size := utf8.DecodeRuneInString(input[end:])
if end+size > n-3 {
break
}
end += size
}
return input[:end] + utf8Ellipsis, utf8Ellipsis + input[end:]
}
// SplitTrimSpace splits the string at given separator and trims leading and trailing space
func SplitTrimSpace(input, sep string) []string {
// replace CRLF with LF
input = strings.ReplaceAll(input, "\r\n", "\n")
var stringList []string
for _, s := range strings.Split(input, sep) {
// trim leading and trailing space
stringList = append(stringList, strings.TrimSpace(s))
}
return stringList
}
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