Function utf8Decode

internal/app/render.go:317–323

utf8Decode is a thin wrapper. Kept separate so future width-aware logic (e.g. CJK double-width) can slot in here.

(s string)

// utf8Decode is a thin wrapper. Kept separate so future width-aware
// logic (e.g. CJK double-width) can slot in here.
func utf8Decode(s string) (rune, int) {
	if len(s) == 0 {
		return 0, 0
	}
	r, size := utf8.DecodeRuneInString(s)
	return r, size
}

// effectiveStyleAt returns the SGR sequence active at visual column `col`
// within string `s` — i.e., the last CSI seen before that column. An