Function getLeadingWhitespaceLength

src/cm/indentGuides.ts:89–99

* Count the leading indentation characters of a line.

(line: string)

 * Count the leading indentation characters of a line.
 */
function getLeadingWhitespaceLength(line: string): number {
	let count = 0;
	for (const ch of line) {
		if (ch === " " || ch === "\t") {
			count++;
			continue;
		}
		break;
	}
	return count;
}

function buildGuideStyle(levels: number, guideStepPx: number): string {
	const images = [];