File size: 867 Bytes
8d3471e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | package util
import "unicode/utf8"
// TruncateRunes trims a string to at most limit Unicode code points.
func TruncateRunes(text string, limit int) (string, bool) {
if limit < 0 {
return text, false
}
if limit == 0 {
return "", text != ""
}
count := 0
for i := range text {
if count == limit {
return text[:i], true
}
count++
}
return text, false
}
// TruncateUTF8Bytes trims a string to fit within limit bytes without cutting
// through a UTF-8 code point boundary.
func TruncateUTF8Bytes(text string, limit int) (string, bool) {
if limit < 0 {
return text, false
}
if len(text) <= limit {
return text, false
}
if limit == 0 {
return "", true
}
raw := []byte(text)
cut := limit
if cut > len(raw) {
cut = len(raw)
}
for cut > 0 && cut < len(raw) && !utf8.RuneStart(raw[cut]) {
cut--
}
return string(raw[:cut]), true
}
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