Function IsWordBreak

core/textfield.go:1967–1987

IsWordBreak defines what counts as a word break for the purposes of selecting words. r1 is the rune in question, r2 is the rune past r1 in the direction you are moving. Pass -1 for r2 if there is no rune past r1.

(r1, r2 rune)

// r1 is the rune in question, r2 is the rune past r1 in the direction you are moving.
// Pass -1 for r2 if there is no rune past r1.
func IsWordBreak(r1, r2 rune) bool {
	if r2 == -1 {
		if unicode.IsSpace(r1) || unicode.IsSymbol(r1) || unicode.IsPunct(r1) {
			return true
		}
		return false
	}
	if unicode.IsSpace(r1) || unicode.IsSymbol(r1) {
		return true
	}
	if unicode.IsPunct(r1) && r1 != rune('\'') {
		return true
	}
	if unicode.IsPunct(r1) && r1 == rune('\'') {
		if unicode.IsSpace(r2) || unicode.IsSymbol(r2) || unicode.IsPunct(r2) {
			return true
		}
		return false
	}
	return false
}

// concealDots creates an n-length []rune of bullet characters.
func concealDots(n int) []rune {