Function isAlpha

src/cm/colorView.ts:53–60

(char: string)

}

function isAlpha(char: string): boolean {
	if (!char) return false;
	const code = char.charCodeAt(0);
	return (
		(code >= 65 && code <= 90) || // A-Z
		(code >= 97 && code <= 122)
	);
}

function charAt(doc: Text, index: number): string {
	if (index < 0 || index >= doc.length) return "";