Function charAt

src/cm/colorView.ts:62–65

(doc: Text, index: number)

}

function charAt(doc: Text, index: number): string {
	if (index < 0 || index >= doc.length) return "";
	return doc.sliceString(index, index + 1);
}

function findPrevNonWhitespace(doc: Text, index: number): number {
	for (let i = index - 1; i >= 0; i--) {