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Edit:
/home/techb158/balavpn.abdallabala.com/node_modules/eslint/lib/rules/lines-around-comment.js
(15497B)
/** * @fileoverview Enforces empty lines around comments. * @author Jamund Ferguson * @deprecated in ESLint v8.53.0 */ "use strict"; //------------------------------------------------------------------------------ // Requirements //------------------------------------------------------------------------------ const astUtils = require("./utils/ast-utils"); //------------------------------------------------------------------------------ // Helpers //------------------------------------------------------------------------------ /** * Return an array with any line numbers that are empty. * @param {Array} lines An array of each line of the file. * @returns {Array} An array of line numbers. */ function getEmptyLineNums(lines) { const emptyLines = lines .map((line, i) => ({ code: line.trim(), num: i + 1, })) .filter(line => !line.code) .map(line => line.num); return emptyLines; } /** * Return an array with any line numbers that contain comments. * @param {Array} comments An array of comment tokens. * @returns {Array} An array of line numbers. */ function getCommentLineNums(comments) { const lines = []; comments.forEach(token => { const start = token.loc.start.line; const end = token.loc.end.line; lines.push(start, end); }); return lines; } //------------------------------------------------------------------------------ // 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: "11.0.0", 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: "lines-around-comment", url: "https://eslint.style/rules/lines-around-comment", }, }, ], }, type: "layout", docs: { description: "Require empty lines around comments", recommended: false, url: "https://eslint.org/docs/latest/rules/lines-around-comment", }, fixable: "whitespace", schema: [ { type: "object", properties: { beforeBlockComment: { type: "boolean", default: true, }, afterBlockComment: { type: "boolean", default: false, }, beforeLineComment: { type: "boolean", default: false, }, afterLineComment: { type: "boolean", default: false, }, allowBlockStart: { type: "boolean", default: false, }, allowBlockEnd: { type: "boolean", default: false, }, allowClassStart: { type: "boolean", }, allowClassEnd: { type: "boolean", }, allowObjectStart: { type: "boolean", }, allowObjectEnd: { type: "boolean", }, allowArrayStart: { type: "boolean", }, allowArrayEnd: { type: "boolean", }, ignorePattern: { type: "string", }, applyDefaultIgnorePatterns: { type: "boolean", }, afterHashbangComment: { type: "boolean", default: false, }, }, additionalProperties: false, }, ], messages: { after: "Expected line after comment.", before: "Expected line before comment.", }, }, create(context) { const options = Object.assign({}, context.options[0]); const ignorePattern = options.ignorePattern; const defaultIgnoreRegExp = astUtils.COMMENTS_IGNORE_PATTERN; const customIgnoreRegExp = new RegExp(ignorePattern, "u"); const applyDefaultIgnorePatterns = options.applyDefaultIgnorePatterns !== false; options.beforeBlockComment = typeof options.beforeBlockComment !== "undefined" ? options.beforeBlockComment : true; const sourceCode = context.sourceCode; const lines = sourceCode.lines, numLines = lines.length + 1, comments = sourceCode.getAllComments(), commentLines = getCommentLineNums(comments), emptyLines = getEmptyLineNums(lines), commentAndEmptyLines = new Set(commentLines.concat(emptyLines)); /** * Returns whether or not comments are on lines starting with or ending with code * @param {token} token The comment token to check. * @returns {boolean} True if the comment is not alone. */ function codeAroundComment(token) { let currentToken = token; do { currentToken = sourceCode.getTokenBefore(currentToken, { includeComments: true, }); } while (currentToken && astUtils.isCommentToken(currentToken)); if ( currentToken && astUtils.isTokenOnSameLine(currentToken, token) ) { return true; } currentToken = token; do { currentToken = sourceCode.getTokenAfter(currentToken, { includeComments: true, }); } while (currentToken && astUtils.isCommentToken(currentToken)); if ( currentToken && astUtils.isTokenOnSameLine(token, currentToken) ) { return true; } return false; } /** * Returns whether or not comments are inside a node type or not. * @param {ASTNode} parent The Comment parent node. * @param {string} nodeType The parent type to check against. * @returns {boolean} True if the comment is inside nodeType. */ function isParentNodeType(parent, nodeType) { return ( parent.type === nodeType || (parent.body && parent.body.type === nodeType) || (parent.consequent && parent.consequent.type === nodeType) ); } /** * Returns the parent node that contains the given token. * @param {token} token The token to check. * @returns {ASTNode|null} The parent node that contains the given token. */ function getParentNodeOfToken(token) { const node = sourceCode.getNodeByRangeIndex(token.range[0]); /* * For the purpose of this rule, the comment token is in a `StaticBlock` node only * if it's inside the braces of that `StaticBlock` node. * * Example where this function returns `null`: * * static * // comment * { * } * * Example where this function returns `StaticBlock` node: * * static * { * // comment * } * */ if (node && node.type === "StaticBlock") { const openingBrace = sourceCode.getFirstToken(node, { skip: 1, }); // skip the `static` token return token.range[0] >= openingBrace.range[0] ? node : null; } return node; } /** * Returns whether or not comments are at the parent start or not. * @param {token} token The Comment token. * @param {string} nodeType The parent type to check against. * @returns {boolean} True if the comment is at parent start. */ function isCommentAtParentStart(token, nodeType) { const parent = getParentNodeOfToken(token); if (parent && isParentNodeType(parent, nodeType)) { let parentStartNodeOrToken = parent; if (parent.type === "StaticBlock") { parentStartNodeOrToken = sourceCode.getFirstToken(parent, { skip: 1, }); // opening brace of the static block } else if (parent.type === "SwitchStatement") { parentStartNodeOrToken = sourceCode.getTokenAfter( parent.discriminant, { filter: astUtils.isOpeningBraceToken, }, ); // opening brace of the switch statement } return ( token.loc.start.line - parentStartNodeOrToken.loc.start.line === 1 ); } return false; } /** * Returns whether or not comments are at the parent end or not. * @param {token} token The Comment token. * @param {string} nodeType The parent type to check against. * @returns {boolean} True if the comment is at parent end. */ function isCommentAtParentEnd(token, nodeType) { const parent = getParentNodeOfToken(token); return ( !!parent && isParentNodeType(parent, nodeType) && parent.loc.end.line - token.loc.end.line === 1 ); } /** * Returns whether or not comments are at the block start or not. * @param {token} token The Comment token. * @returns {boolean} True if the comment is at block start. */ function isCommentAtBlockStart(token) { return ( isCommentAtParentStart(token, "ClassBody") || isCommentAtParentStart(token, "BlockStatement") || isCommentAtParentStart(token, "StaticBlock") || isCommentAtParentStart(token, "SwitchCase") || isCommentAtParentStart(token, "SwitchStatement") ); } /** * Returns whether or not comments are at the block end or not. * @param {token} token The Comment token. * @returns {boolean} True if the comment is at block end. */ function isCommentAtBlockEnd(token) { return ( isCommentAtParentEnd(token, "ClassBody") || isCommentAtParentEnd(token, "BlockStatement") || isCommentAtParentEnd(token, "StaticBlock") || isCommentAtParentEnd(token, "SwitchCase") || isCommentAtParentEnd(token, "SwitchStatement") ); } /** * Returns whether or not comments are at the class start or not. * @param {token} token The Comment token. * @returns {boolean} True if the comment is at class start. */ function isCommentAtClassStart(token) { return isCommentAtParentStart(token, "ClassBody"); } /** * Returns whether or not comments are at the class end or not. * @param {token} token The Comment token. * @returns {boolean} True if the comment is at class end. */ function isCommentAtClassEnd(token) { return isCommentAtParentEnd(token, "ClassBody"); } /** * Returns whether or not comments are at the object start or not. * @param {token} token The Comment token. * @returns {boolean} True if the comment is at object start. */ function isCommentAtObjectStart(token) { return ( isCommentAtParentStart(token, "ObjectExpression") || isCommentAtParentStart(token, "ObjectPattern") ); } /** * Returns whether or not comments are at the object end or not. * @param {token} token The Comment token. * @returns {boolean} True if the comment is at object end. */ function isCommentAtObjectEnd(token) { return ( isCommentAtParentEnd(token, "ObjectExpression") || isCommentAtParentEnd(token, "ObjectPattern") ); } /** * Returns whether or not comments are at the array start or not. * @param {token} token The Comment token. * @returns {boolean} True if the comment is at array start. */ function isCommentAtArrayStart(token) { return ( isCommentAtParentStart(token, "ArrayExpression") || isCommentAtParentStart(token, "ArrayPattern") ); } /** * Returns whether or not comments are at the array end or not. * @param {token} token The Comment token. * @returns {boolean} True if the comment is at array end. */ function isCommentAtArrayEnd(token) { return ( isCommentAtParentEnd(token, "ArrayExpression") || isCommentAtParentEnd(token, "ArrayPattern") ); } /** * Checks if a comment token has lines around it (ignores inline comments) * @param {token} token The Comment token. * @param {Object} opts Options to determine the newline. * @param {boolean} opts.after Should have a newline after this line. * @param {boolean} opts.before Should have a newline before this line. * @returns {void} */ function checkForEmptyLine(token, opts) { if ( applyDefaultIgnorePatterns && defaultIgnoreRegExp.test(token.value) ) { return; } if (ignorePattern && customIgnoreRegExp.test(token.value)) { return; } let after = opts.after, before = opts.before; const prevLineNum = token.loc.start.line - 1, nextLineNum = token.loc.end.line + 1, commentIsNotAlone = codeAroundComment(token); const blockStartAllowed = options.allowBlockStart && isCommentAtBlockStart(token) && !( options.allowClassStart === false && isCommentAtClassStart(token) ), blockEndAllowed = options.allowBlockEnd && isCommentAtBlockEnd(token) && !( options.allowClassEnd === false && isCommentAtClassEnd(token) ), classStartAllowed = options.allowClassStart && isCommentAtClassStart(token), classEndAllowed = options.allowClassEnd && isCommentAtClassEnd(token), objectStartAllowed = options.allowObjectStart && isCommentAtObjectStart(token), objectEndAllowed = options.allowObjectEnd && isCommentAtObjectEnd(token), arrayStartAllowed = options.allowArrayStart && isCommentAtArrayStart(token), arrayEndAllowed = options.allowArrayEnd && isCommentAtArrayEnd(token); const exceptionStartAllowed = blockStartAllowed || classStartAllowed || objectStartAllowed || arrayStartAllowed; const exceptionEndAllowed = blockEndAllowed || classEndAllowed || objectEndAllowed || arrayEndAllowed; // ignore top of the file and bottom of the file if (prevLineNum < 1) { before = false; } if (nextLineNum >= numLines) { after = false; } // we ignore all inline comments if (commentIsNotAlone) { return; } const previousTokenOrComment = sourceCode.getTokenBefore(token, { includeComments: true, }); const nextTokenOrComment = sourceCode.getTokenAfter(token, { includeComments: true, }); // check for newline before if ( !exceptionStartAllowed && before && !commentAndEmptyLines.has(prevLineNum) && !( astUtils.isCommentToken(previousTokenOrComment) && astUtils.isTokenOnSameLine(previousTokenOrComment, token) ) ) { const lineStart = token.range[0] - token.loc.start.column; const range = [lineStart, lineStart]; context.report({ node: token, messageId: "before", fix(fixer) { return fixer.insertTextBeforeRange(range, "\n"); }, }); } // check for newline after if ( !exceptionEndAllowed && after && !commentAndEmptyLines.has(nextLineNum) && !( astUtils.isCommentToken(nextTokenOrComment) && astUtils.isTokenOnSameLine(token, nextTokenOrComment) ) ) { context.report({ node: token, messageId: "after", fix(fixer) { return fixer.insertTextAfter(token, "\n"); }, }); } } //-------------------------------------------------------------------------- // Public //-------------------------------------------------------------------------- return { Program() { comments.forEach(token => { if (token.type === "Line") { if ( options.beforeLineComment || options.afterLineComment ) { checkForEmptyLine(token, { after: options.afterLineComment, before: options.beforeLineComment, }); } } else if (token.type === "Block") { if ( options.beforeBlockComment || options.afterBlockComment ) { checkForEmptyLine(token, { after: options.afterBlockComment, before: options.beforeBlockComment, }); } } else if (token.type === "Shebang") { if (options.afterHashbangComment) { checkForEmptyLine(token, { after: options.afterHashbangComment, before: false, }); } } }); }, }; }, };
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