Function collapseControlRunsWithSpaces

src/utils/generatedFilePath.ts:25–53

(value: string)

// space run is not followed by a control character the regex left it
// untouched, so the scanner copies it verbatim and jumps past it.
function collapseControlRunsWithSpaces(value: string): string {
	let out = "";
	let i = 0;
	while (i < value.length) {
		let j = i;
		while (j < value.length && value.charCodeAt(j) === 0x20 /* space */) {
			j++;
		}
		if (j < value.length && isControlOrLineSeparator(value.charCodeAt(j))) {
			while (
				j < value.length &&
				isControlOrLineSeparator(value.charCodeAt(j))
			) {
				j++;
			}
			while (j < value.length && value.charCodeAt(j) === 0x20) {
				j++;
			}
			out += " ";
			i = j;
			continue;
		}
		// No control char after the space run: nothing here can start a match,
		// so copy [i, j] verbatim (run + the non-matching char) and move on.
		out += value.slice(i, Math.min(j + 1, value.length));
		i = j + 1;
	}
	return out;
}

/**
 * Linear trailing-trim for a small character set. The historical