dependency-cruiser/src/utl/wrap-and-indent.mjs

Validate and visualize dependencies. With your rules. JavaScript, TypeScript, CoffeeScript. ES6, CommonJS, AMD.

const DEFAULT_INDENT = 4;

function indentString(pString, pCount) {
	return pString.replaceAll(/^(?!\s*$)/gm, " ".repeat(pCount));
}

/**
 * @param {string} pLine
 * @param {number} pMaxWidth
 */
function splitLine(pLine, pMaxWidth) {
	const lWords = pLine.split(" ");
	const lWrappedLines = [];
	let lCurrentLine = "";
	let lCurrentWidth = 0;

	for (const lWord of lWords) {
		if (lCurrentWidth + lWord.length > pMaxWidth) {
			lWrappedLines.push(lCurrentLine.trimEnd());
			lCurrentLine = "";
			lCurrentWidth = 0;
		}

		if (lCurrentLine) {
			lCurrentLine += " ";
			lCurrentWidth += 1;
		}

		lCurrentLine += lWord;
		lCurrentWidth += lWord.length;
	}

	lWrappedLines.push(lCurrentLine.trimEnd());

	return lWrappedLines.join("\n");
}

/**
 * @param {string} pString - the string to wrap
 * @param {number} pMaxWidth - the maximum width of the wrapped string
 */
function wrapString(pString, pMaxWidth) {
	return pString
		.split(/\r?\n/)
		.map((pLine) => splitLine(pLine, pMaxWidth))
		.join("\n");
}

export default function wrapAndIndent(pString, pIndent = DEFAULT_INDENT) {
	const lMaxConsoleWidth = 78;
	const lMaxWidth = lMaxConsoleWidth - pIndent;

	return indentString(wrapString(pString, lMaxWidth), pIndent);
}