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app_vue/node_modules/eslint/lib/rules/space-in-parens.js

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+/**
+ * @fileoverview Disallows or enforces spaces inside of parentheses.
+ * @author Jonathan Rajavuori
+ */
+"use strict";
+
+const astUtils = require("./utils/ast-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        type: "layout",
+
+        docs: {
+            description: "enforce consistent spacing inside parentheses",
+            category: "Stylistic Issues",
+            recommended: false,
+            url: "https://eslint.org/docs/rules/space-in-parens"
+        },
+
+        fixable: "whitespace",
+
+        schema: [
+            {
+                enum: ["always", "never"]
+            },
+            {
+                type: "object",
+                properties: {
+                    exceptions: {
+                        type: "array",
+                        items: {
+                            enum: ["{}", "[]", "()", "empty"]
+                        },
+                        uniqueItems: true
+                    }
+                },
+                additionalProperties: false
+            }
+        ],
+
+        messages: {
+            missingOpeningSpace: "There must be a space after this paren.",
+            missingClosingSpace: "There must be a space before this paren.",
+            rejectedOpeningSpace: "There should be no space after this paren.",
+            rejectedClosingSpace: "There should be no space before this paren."
+        }
+    },
+
+    create(context) {
+        const ALWAYS = context.options[0] === "always",
+            exceptionsArrayOptions = (context.options[1] && context.options[1].exceptions) || [],
+            options = {};
+
+        let exceptions;
+
+        if (exceptionsArrayOptions.length) {
+            options.braceException = exceptionsArrayOptions.includes("{}");
+            options.bracketException = exceptionsArrayOptions.includes("[]");
+            options.parenException = exceptionsArrayOptions.includes("()");
+            options.empty = exceptionsArrayOptions.includes("empty");
+        }
+
+        /**
+         * Produces an object with the opener and closer exception values
+         * @returns {Object} `openers` and `closers` exception values
+         * @private
+         */
+        function getExceptions() {
+            const openers = [],
+                closers = [];
+
+            if (options.braceException) {
+                openers.push("{");
+                closers.push("}");
+            }
+
+            if (options.bracketException) {
+                openers.push("[");
+                closers.push("]");
+            }
+
+            if (options.parenException) {
+                openers.push("(");
+                closers.push(")");
+            }
+
+            if (options.empty) {
+                openers.push(")");
+                closers.push("(");
+            }
+
+            return {
+                openers,
+                closers
+            };
+        }
+
+        //--------------------------------------------------------------------------
+        // Helpers
+        //--------------------------------------------------------------------------
+        const sourceCode = context.getSourceCode();
+
+        /**
+         * Determines if a token is one of the exceptions for the opener paren
+         * @param {Object} token The token to check
+         * @returns {boolean} True if the token is one of the exceptions for the opener paren
+         */
+        function isOpenerException(token) {
+            return exceptions.openers.includes(token.value);
+        }
+
+        /**
+         * Determines if a token is one of the exceptions for the closer paren
+         * @param {Object} token The token to check
+         * @returns {boolean} True if the token is one of the exceptions for the closer paren
+         */
+        function isCloserException(token) {
+            return exceptions.closers.includes(token.value);
+        }
+
+        /**
+         * Determines if an opening paren is immediately followed by a required space
+         * @param {Object} openingParenToken The paren token
+         * @param {Object} tokenAfterOpeningParen The token after it
+         * @returns {boolean} True if the opening paren is missing a required space
+         */
+        function openerMissingSpace(openingParenToken, tokenAfterOpeningParen) {
+            if (sourceCode.isSpaceBetweenTokens(openingParenToken, tokenAfterOpeningParen)) {
+                return false;
+            }
+
+            if (!options.empty && astUtils.isClosingParenToken(tokenAfterOpeningParen)) {
+                return false;
+            }
+
+            if (ALWAYS) {
+                return !isOpenerException(tokenAfterOpeningParen);
+            }
+            return isOpenerException(tokenAfterOpeningParen);
+        }
+
+        /**
+         * Determines if an opening paren is immediately followed by a disallowed space
+         * @param {Object} openingParenToken The paren token
+         * @param {Object} tokenAfterOpeningParen The token after it
+         * @returns {boolean} True if the opening paren has a disallowed space
+         */
+        function openerRejectsSpace(openingParenToken, tokenAfterOpeningParen) {
+            if (!astUtils.isTokenOnSameLine(openingParenToken, tokenAfterOpeningParen)) {
+                return false;
+            }
+
+            if (tokenAfterOpeningParen.type === "Line") {
+                return false;
+            }
+
+            if (!sourceCode.isSpaceBetweenTokens(openingParenToken, tokenAfterOpeningParen)) {
+                return false;
+            }
+
+            if (ALWAYS) {
+                return isOpenerException(tokenAfterOpeningParen);
+            }
+            return !isOpenerException(tokenAfterOpeningParen);
+        }
+
+        /**
+         * Determines if a closing paren is immediately preceded by a required space
+         * @param {Object} tokenBeforeClosingParen The token before the paren
+         * @param {Object} closingParenToken The paren token
+         * @returns {boolean} True if the closing paren is missing a required space
+         */
+        function closerMissingSpace(tokenBeforeClosingParen, closingParenToken) {
+            if (sourceCode.isSpaceBetweenTokens(tokenBeforeClosingParen, closingParenToken)) {
+                return false;
+            }
+
+            if (!options.empty && astUtils.isOpeningParenToken(tokenBeforeClosingParen)) {
+                return false;
+            }
+
+            if (ALWAYS) {
+                return !isCloserException(tokenBeforeClosingParen);
+            }
+            return isCloserException(tokenBeforeClosingParen);
+        }
+
+        /**
+         * Determines if a closer paren is immediately preceded by a disallowed space
+         * @param {Object} tokenBeforeClosingParen The token before the paren
+         * @param {Object} closingParenToken The paren token
+         * @returns {boolean} True if the closing paren has a disallowed space
+         */
+        function closerRejectsSpace(tokenBeforeClosingParen, closingParenToken) {
+            if (!astUtils.isTokenOnSameLine(tokenBeforeClosingParen, closingParenToken)) {
+                return false;
+            }
+
+            if (!sourceCode.isSpaceBetweenTokens(tokenBeforeClosingParen, closingParenToken)) {
+                return false;
+            }
+
+            if (ALWAYS) {
+                return isCloserException(tokenBeforeClosingParen);
+            }
+            return !isCloserException(tokenBeforeClosingParen);
+        }
+
+        //--------------------------------------------------------------------------
+        // Public
+        //--------------------------------------------------------------------------
+
+        return {
+            Program: function checkParenSpaces(node) {
+                exceptions = getExceptions();
+                const tokens = sourceCode.tokensAndComments;
+
+                tokens.forEach((token, i) => {
+                    const prevToken = tokens[i - 1];
+                    const nextToken = tokens[i + 1];
+
+                    // if token is not an opening or closing paren token, do nothing
+                    if (!astUtils.isOpeningParenToken(token) && !astUtils.isClosingParenToken(token)) {
+                        return;
+                    }
+
+                    // if token is an opening paren and is not followed by a required space
+                    if (token.value === "(" && openerMissingSpace(token, nextToken)) {
+                        context.report({
+                            node,
+                            loc: token.loc,
+                            messageId: "missingOpeningSpace",
+                            fix(fixer) {
+                                return fixer.insertTextAfter(token, " ");
+                            }
+                        });
+                    }
+
+                    // if token is an opening paren and is followed by a disallowed space
+                    if (token.value === "(" && openerRejectsSpace(token, nextToken)) {
+                        context.report({
+                            node,
+                            loc: { start: token.loc.end, end: nextToken.loc.start },
+                            messageId: "rejectedOpeningSpace",
+                            fix(fixer) {
+                                return fixer.removeRange([token.range[1], nextToken.range[0]]);
+                            }
+                        });
+                    }
+
+                    // if token is a closing paren and is not preceded by a required space
+                    if (token.value === ")" && closerMissingSpace(prevToken, token)) {
+                        context.report({
+                            node,
+                            loc: token.loc,
+                            messageId: "missingClosingSpace",
+                            fix(fixer) {
+                                return fixer.insertTextBefore(token, " ");
+                            }
+                        });
+                    }
+
+                    // if token is a closing paren and is preceded by a disallowed space
+                    if (token.value === ")" && closerRejectsSpace(prevToken, token)) {
+                        context.report({
+                            node,
+                            loc: { start: prevToken.loc.end, end: token.loc.start },
+                            messageId: "rejectedClosingSpace",
+                            fix(fixer) {
+                                return fixer.removeRange([prevToken.range[1], token.range[0]]);
+                            }
+                        });
+                    }
+                });
+            }
+        };
+    }
+};