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/** * @fileoverview Disallow trailing spaces at the end of lines. * @author Nodeca Team <https://github.com/nodeca> * @deprecated in ESLint v8.53.0 */ "use strict"; //------------------------------------------------------------------------------ // Requirements //------------------------------------------------------------------------------ const astUtils = require("./utils/ast-utils"); //------------------------------------------------------------------------------ // Rule Definition //------------------------------------------------------------------------------ /** @type {import('../shared/types').Rule} */ module.exports = { meta: { deprecated: true, replacedBy: [], type: "layout", docs: { description: "Disallow trailing whitespace at the end of lines", recommended: false, url: "https://eslint.org/docs/latest/rules/no-trailing-spaces" }, fixable: "whitespace", schema: [ { type: "object", properties: { skipBlankLines: { type: "boolean", default: false }, ignoreComments: { type: "boolean", default: false } }, additionalProperties: false } ], messages: { trailingSpace: "Trailing spaces not allowed." } }, create(context) { const sourceCode = context.sourceCode; const BLANK_CLASS = "[ \t\u00a0\u2000-\u200b\u3000]", SKIP_BLANK = `^${BLANK_CLASS}*$`, NONBLANK = `${BLANK_CLASS}+$`; const options = context.options[0] || {}, skipBlankLines = options.skipBlankLines || false, ignoreComments = options.ignoreComments || false; /** * Report the error message * @param {ASTNode} node node to report * @param {int[]} location range information * @param {int[]} fixRange Range based on the whole program * @returns {void} */ function report(node, location, fixRange) { /* * Passing node is a bit dirty, because message data will contain big * text in `source`. But... who cares :) ? * One more kludge will not make worse the bloody wizardry of this * plugin. */ context.report({ node, loc: location, messageId: "trailingSpace", fix(fixer) { return fixer.removeRange(fixRange); } }); } /** * Given a list of comment nodes, return the line numbers for those comments. * @param {Array} comments An array of comment nodes. * @returns {number[]} An array of line numbers containing comments. */ function getCommentLineNumbers(comments) { const lines = new Set(); comments.forEach(comment => { const endLine = comment.type === "Block" ? comment.loc.end.line - 1 : comment.loc.end.line; for (let i = comment.loc.start.line; i <= endLine; i++) { lines.add(i); } }); return lines; } //-------------------------------------------------------------------------- // Public //-------------------------------------------------------------------------- return { Program: function checkTrailingSpaces(node) { /* * Let's hack. Since Espree does not return whitespace nodes, * fetch the source code and do matching via regexps. */ const re = new RegExp(NONBLANK, "u"), skipMatch = new RegExp(SKIP_BLANK, "u"), lines = sourceCode.lines, linebreaks = sourceCode.getText().match(astUtils.createGlobalLinebreakMatcher()), comments = sourceCode.getAllComments(), commentLineNumbers = getCommentLineNumbers(comments); let totalLength = 0, fixRange = []; for (let i = 0, ii = lines.length; i < ii; i++) { const lineNumber = i + 1; /* * Always add linebreak length to line length to accommodate for line break (\n or \r\n) * Because during the fix time they also reserve one spot in the array. * Usually linebreak length is 2 for \r\n (CRLF) and 1 for \n (LF) */ const linebreakLength = linebreaks && linebreaks[i] ? linebreaks[i].length : 1; const lineLength = lines[i].length + linebreakLength; const matches = re.exec(lines[i]); if (matches) { const location = { start: { line: lineNumber, column: matches.index }, end: { line: lineNumber, column: lineLength - linebreakLength } }; const rangeStart = totalLength + location.start.column; const rangeEnd = totalLength + location.end.column; const containingNode = sourceCode.getNodeByRangeIndex(rangeStart); if (containingNode && containingNode.type === "TemplateElement" && rangeStart > containingNode.parent.range[0] && rangeEnd < containingNode.parent.range[1]) { totalLength += lineLength; continue; } /* * If the line has only whitespace, and skipBlankLines * is true, don't report it */ if (skipBlankLines && skipMatch.test(lines[i])) { totalLength += lineLength; continue; } fixRange = [rangeStart, rangeEnd]; if (!ignoreComments || !commentLineNumbers.has(lineNumber)) { report(node, location, fixRange); } } totalLength += lineLength; } } }; } };