Add components

slider/node_modules/eslint/lib/rules/no-multiple-empty-lines.js

@@ -0,0 +1,210 @@
+/**
+ * @fileoverview Disallows multiple blank lines.
+ * implementation adapted from the no-trailing-spaces rule.
+ * @author Greg Cochard
+ * @deprecated in ESLint v8.53.0
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+/** @type {import('../types').Rule.RuleModule} */
+module.exports = {
+	meta: {
+		deprecated: {
+			message: "Formatting rules are being moved out of ESLint core.",
+			url: "https://eslint.org/blog/2023/10/deprecating-formatting-rules/",
+			deprecatedSince: "8.53.0",
+			availableUntil: "10.0.0",
+			replacedBy: [
+				{
+					message:
+						"ESLint Stylistic now maintains deprecated stylistic core rules.",
+					url: "https://eslint.style/guide/migration",
+					plugin: {
+						name: "@stylistic/eslint-plugin",
+						url: "https://eslint.style",
+					},
+					rule: {
+						name: "no-multiple-empty-lines",
+						url: "https://eslint.style/rules/no-multiple-empty-lines",
+					},
+				},
+			],
+		},
+		type: "layout",
+
+		docs: {
+			description: "Disallow multiple empty lines",
+			recommended: false,
+			url: "https://eslint.org/docs/latest/rules/no-multiple-empty-lines",
+		},
+
+		fixable: "whitespace",
+
+		schema: [
+			{
+				type: "object",
+				properties: {
+					max: {
+						type: "integer",
+						minimum: 0,
+					},
+					maxEOF: {
+						type: "integer",
+						minimum: 0,
+					},
+					maxBOF: {
+						type: "integer",
+						minimum: 0,
+					},
+				},
+				required: ["max"],
+				additionalProperties: false,
+			},
+		],
+
+		messages: {
+			blankBeginningOfFile:
+				"Too many blank lines at the beginning of file. Max of {{max}} allowed.",
+			blankEndOfFile:
+				"Too many blank lines at the end of file. Max of {{max}} allowed.",
+			consecutiveBlank:
+				"More than {{max}} blank {{pluralizedLines}} not allowed.",
+		},
+	},
+
+	create(context) {
+		// Use options.max or 2 as default
+		let max = 2,
+			maxEOF = max,
+			maxBOF = max;
+
+		if (context.options.length) {
+			max = context.options[0].max;
+			maxEOF =
+				typeof context.options[0].maxEOF !== "undefined"
+					? context.options[0].maxEOF
+					: max;
+			maxBOF =
+				typeof context.options[0].maxBOF !== "undefined"
+					? context.options[0].maxBOF
+					: max;
+		}
+
+		const sourceCode = context.sourceCode;
+
+		// Swallow the final newline, as some editors add it automatically and we don't want it to cause an issue
+		const allLines =
+			sourceCode.lines.at(-1) === ""
+				? sourceCode.lines.slice(0, -1)
+				: sourceCode.lines;
+		const templateLiteralLines = new Set();
+
+		//--------------------------------------------------------------------------
+		// Public
+		//--------------------------------------------------------------------------
+
+		return {
+			TemplateLiteral(node) {
+				node.quasis.forEach(literalPart => {
+					// Empty lines have a semantic meaning if they're inside template literals. Don't count these as empty lines.
+					for (
+						let ignoredLine = literalPart.loc.start.line;
+						ignoredLine < literalPart.loc.end.line;
+						ignoredLine++
+					) {
+						templateLiteralLines.add(ignoredLine);
+					}
+				});
+			},
+			"Program:exit"(node) {
+				return (
+					allLines
+
+						// Given a list of lines, first get a list of line numbers that are non-empty.
+						.reduce((nonEmptyLineNumbers, line, index) => {
+							if (
+								line.trim() ||
+								templateLiteralLines.has(index + 1)
+							) {
+								nonEmptyLineNumbers.push(index + 1);
+							}
+							return nonEmptyLineNumbers;
+						}, [])
+
+						// Add a value at the end to allow trailing empty lines to be checked.
+						.concat(allLines.length + 1)
+
+						// Given two line numbers of non-empty lines, report the lines between if the difference is too large.
+						.reduce((lastLineNumber, lineNumber) => {
+							let messageId, maxAllowed;
+
+							if (lastLineNumber === 0) {
+								messageId = "blankBeginningOfFile";
+								maxAllowed = maxBOF;
+							} else if (lineNumber === allLines.length + 1) {
+								messageId = "blankEndOfFile";
+								maxAllowed = maxEOF;
+							} else {
+								messageId = "consecutiveBlank";
+								maxAllowed = max;
+							}
+
+							if (lineNumber - lastLineNumber - 1 > maxAllowed) {
+								context.report({
+									node,
+									loc: {
+										start: {
+											line:
+												lastLineNumber + maxAllowed + 1,
+											column: 0,
+										},
+										end: { line: lineNumber, column: 0 },
+									},
+									messageId,
+									data: {
+										max: maxAllowed,
+										pluralizedLines:
+											maxAllowed === 1 ? "line" : "lines",
+									},
+									fix(fixer) {
+										const rangeStart =
+											sourceCode.getIndexFromLoc({
+												line: lastLineNumber + 1,
+												column: 0,
+											});
+
+										/*
+										 * The end of the removal range is usually the start index of the next line.
+										 * However, at the end of the file there is no next line, so the end of the
+										 * range is just the length of the text.
+										 */
+										const lineNumberAfterRemovedLines =
+											lineNumber - maxAllowed;
+										const rangeEnd =
+											lineNumberAfterRemovedLines <=
+											allLines.length
+												? sourceCode.getIndexFromLoc({
+														line: lineNumberAfterRemovedLines,
+														column: 0,
+													})
+												: sourceCode.text.length;
+
+										return fixer.removeRange([
+											rangeStart,
+											rangeEnd,
+										]);
+									},
+								});
+							}
+
+							return lineNumber;
+						}, 0)
+				);
+			},
+		};
+	},
+};