webpack/lib/formatLocation.js

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/

"use strict";

/** @typedef {import("./Dependency").DependencyLocation} DependencyLocation */
/** @typedef {import("./Dependency").SourcePosition} SourcePosition */

/**
 * Returns formatted position.
 * @param {SourcePosition} pos position
 * @returns {string} formatted position
 */
const formatPosition = (pos) => {
	if (pos && typeof pos === "object") {
		if ("line" in pos && "column" in pos) {
			return `${pos.line}:${pos.column}`;
		} else if ("line" in pos) {
			return `${pos.line}:?`;
		}
	}
	return "";
};

/**
 * Returns formatted location.
 * @param {DependencyLocation} loc location
 * @returns {string} formatted location
 */
const formatLocation = (loc) => {
	if (loc && typeof loc === "object") {
		if ("start" in loc && loc.start && "end" in loc && loc.end) {
			if (
				typeof loc.start === "object" &&
				typeof loc.start.line === "number" &&
				typeof loc.end === "object" &&
				typeof loc.end.line === "number" &&
				typeof loc.end.column === "number" &&
				loc.start.line === loc.end.line
			) {
				return `${formatPosition(loc.start)}-${loc.end.column}`;
			} else if (
				typeof loc.start === "object" &&
				typeof loc.start.line === "number" &&
				typeof loc.start.column !== "number" &&
				typeof loc.end === "object" &&
				typeof loc.end.line === "number" &&
				typeof loc.end.column !== "number"
			) {
				return `${loc.start.line}-${loc.end.line}`;
			}
			return `${formatPosition(loc.start)}-${formatPosition(loc.end)}`;
		}
		if ("start" in loc && loc.start) {
			return formatPosition(loc.start);
		}
		if ("name" in loc && "index" in loc) {
			return `${loc.name}[${loc.index}]`;
		}
		if ("name" in loc) {
			return loc.name;
		}
	}
	return "";
};

module.exports = formatLocation;