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app_vue/node_modules/eslint/lib/rules/no-trailing-spaces.js

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+/**
+ * @fileoverview Disallow trailing spaces at the end of lines.
+ * @author Nodeca Team <https://github.com/nodeca>
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const astUtils = require("./utils/ast-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        type: "layout",
+
+        docs: {
+            description: "disallow trailing whitespace at the end of lines",
+            category: "Stylistic Issues",
+            recommended: false,
+            url: "https://eslint.org/docs/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.getSourceCode();
+
+        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;
+                }
+            }
+
+        };
+    }
+};