Add components

slider/node_modules/eslint/lib/linter/vfile.js

@@ -0,0 +1,115 @@
+/**
+ * @fileoverview Virtual file
+ * @author Nicholas C. Zakas
+ */
+
+"use strict";
+
+//-----------------------------------------------------------------------------
+// Type Definitions
+//-----------------------------------------------------------------------------
+
+/** @typedef {import("@eslint/core").File} File */
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+/**
+ * Determines if a given value has a byte order mark (BOM).
+ * @param {string|Uint8Array} value The value to check.
+ * @returns {boolean} `true` if the value has a BOM, `false` otherwise.
+ */
+function hasUnicodeBOM(value) {
+	return typeof value === "string"
+		? value.charCodeAt(0) === 0xfeff
+		: value[0] === 0xef && value[1] === 0xbb && value[2] === 0xbf;
+}
+
+/**
+ * Strips Unicode BOM from the given value.
+ * @param {string|Uint8Array} value The value to remove the BOM from.
+ * @returns {string|Uint8Array} The stripped value.
+ */
+function stripUnicodeBOM(value) {
+	if (!hasUnicodeBOM(value)) {
+		return value;
+	}
+
+	if (typeof value === "string") {
+		/*
+		 * Check Unicode BOM.
+		 * In JavaScript, string data is stored as UTF-16, so BOM is 0xFEFF.
+		 * http://www.ecma-international.org/ecma-262/6.0/#sec-unicode-format-control-characters
+		 */
+		return value.slice(1);
+	}
+
+	/*
+	 * In a Uint8Array, the BOM is represented by three bytes: 0xEF, 0xBB, and 0xBF,
+	 * so we can just remove the first three bytes.
+	 */
+	return value.slice(3);
+}
+
+//------------------------------------------------------------------------------
+// Exports
+//------------------------------------------------------------------------------
+
+/**
+ * Represents a virtual file inside of ESLint.
+ * @implements {File}
+ */
+class VFile {
+	/**
+	 * The file path including any processor-created virtual path.
+	 * @type {string}
+	 * @readonly
+	 */
+	path;
+
+	/**
+	 * The file path on disk.
+	 * @type {string}
+	 * @readonly
+	 */
+	physicalPath;
+
+	/**
+	 * The file contents.
+	 * @type {string|Uint8Array}
+	 * @readonly
+	 */
+	body;
+
+	/**
+	 * The raw body of the file, including a BOM if present.
+	 * @type {string|Uint8Array}
+	 * @readonly
+	 */
+	rawBody;
+
+	/**
+	 * Indicates whether the file has a byte order mark (BOM).
+	 * @type {boolean}
+	 * @readonly
+	 */
+	bom;
+
+	/**
+	 * Creates a new instance.
+	 * @param {string} path The file path.
+	 * @param {string|Uint8Array} body The file contents.
+	 * @param {Object} [options] Additional options.
+	 * @param {string} [options.physicalPath] The file path on disk.
+	 */
+	constructor(path, body, { physicalPath } = {}) {
+		this.path = path;
+		this.physicalPath = physicalPath ?? path;
+		this.bom = hasUnicodeBOM(body);
+		this.body = stripUnicodeBOM(body);
+		this.rawBody = body;
+	}
+}
+
+module.exports = { VFile };