function escapeText()

in build/importTypescript.js [202:260]
56 lines of code
12 McCabe index (conditional complexity)

function escapeText(text) {
	// See http://www.javascriptkit.com/jsref/escapesequence.shtml
	const _backspace = '\b'.charCodeAt(0);
	const _formFeed = '\f'.charCodeAt(0);
	const _newLine = '\n'.charCodeAt(0);
	const _nullChar = 0;
	const _carriageReturn = '\r'.charCodeAt(0);
	const _tab = '\t'.charCodeAt(0);
	const _verticalTab = '\v'.charCodeAt(0);
	const _backslash = '\\'.charCodeAt(0);
	const _doubleQuote = '"'.charCodeAt(0);

	const len = text.length;
	let startPos = 0;
	let chrCode;
	let replaceWith = null;
	let resultPieces = [];

	for (let i = 0; i < len; i++) {
		chrCode = text.charCodeAt(i);
		switch (chrCode) {
			case _backspace:
				replaceWith = '\\b';
				break;
			case _formFeed:
				replaceWith = '\\f';
				break;
			case _newLine:
				replaceWith = '\\n';
				break;
			case _nullChar:
				replaceWith = '\\0';
				break;
			case _carriageReturn:
				replaceWith = '\\r';
				break;
			case _tab:
				replaceWith = '\\t';
				break;
			case _verticalTab:
				replaceWith = '\\v';
				break;
			case _backslash:
				replaceWith = '\\\\';
				break;
			case _doubleQuote:
				replaceWith = '\\"';
				break;
		}
		if (replaceWith !== null) {
			resultPieces.push(text.substring(startPos, i));
			resultPieces.push(replaceWith);
			startPos = i + 1;
			replaceWith = null;
		}
	}
	resultPieces.push(text.substring(startPos, len));
	return resultPieces.join('');
}