// 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 spacefunc SplitTrimSpace(input, sep string) []string {	// Trim initial leading & trailing space	input = strings.TrimSpace(input)	// 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}