Function StringWidth

internal/util/util.go:215–240

StringWidth returns the visual width of a byte array indexed from 0 to n (rune index) with a given tabsize

(b []byte, n, tabsize int)

// StringWidth returns the visual width of a byte array indexed from 0 to n (rune index)
// with a given tabsize
func StringWidth(b []byte, n, tabsize int) int {
	if n <= 0 {
		return 0
	}
	i := 0
	width := 0
	for len(b) > 0 {
		r, _, size := DecodeCharacter(b)
		b = b[size:]

		switch r {
		case '\t':
			ts := tabsize - (width % tabsize)
			width += ts
		default:
			width += runewidth.RuneWidth(r)
		}

		i++

		if i == n {
			return width
		}
	}
	return width
}

// Min takes the min of two ints
func Min(a, b int) int {