Current Dev State

static/js/ketcher2/node_modules/eslint/lib/rules/space-in-parens.js

@@ -0,0 +1,275 @@
+/**
+ * @fileoverview Disallows or enforces spaces inside of parentheses.
+ * @author Jonathan Rajavuori
+ */
+"use strict";
+
+const astUtils = require("../ast-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        docs: {
+            description: "enforce consistent spacing inside parentheses",
+            category: "Stylistic Issues",
+            recommended: false
+        },
+
+        fixable: "whitespace",
+
+        schema: [
+            {
+                enum: ["always", "never"]
+            },
+            {
+                type: "object",
+                properties: {
+                    exceptions: {
+                        type: "array",
+                        items: {
+                            enum: ["{}", "[]", "()", "empty"]
+                        },
+                        uniqueItems: true
+                    }
+                },
+                additionalProperties: false
+            }
+        ]
+    },
+
+    create(context) {
+
+        const MISSING_SPACE_MESSAGE = "There must be a space inside this paren.",
+            REJECTED_SPACE_MESSAGE = "There should be no spaces inside this paren.",
+            ALWAYS = context.options[0] === "always",
+
+            exceptionsArrayOptions = (context.options.length === 2) ? context.options[1].exceptions : [],
+            options = {};
+        let exceptions;
+
+        if (exceptionsArrayOptions.length) {
+            options.braceException = exceptionsArrayOptions.indexOf("{}") !== -1;
+            options.bracketException = exceptionsArrayOptions.indexOf("[]") !== -1;
+            options.parenException = exceptionsArrayOptions.indexOf("()") !== -1;
+            options.empty = exceptionsArrayOptions.indexOf("empty") !== -1;
+        }
+
+        /**
+         * Produces an object with the opener and closer exception values
+         * @param {Object} opts The exception options
+         * @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 token.type === "Punctuator" && exceptions.openers.indexOf(token.value) >= 0;
+        }
+
+        /**
+         * 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 token.type === "Punctuator" && exceptions.closers.indexOf(token.value) >= 0;
+        }
+
+        /**
+         * Determines if an opener paren should have a missing space after it
+         * @param {Object} left The paren token
+         * @param {Object} right The token after it
+         * @returns {boolean} True if the paren should have a space
+         */
+        function shouldOpenerHaveSpace(left, right) {
+            if (sourceCode.isSpaceBetweenTokens(left, right)) {
+                return false;
+            }
+
+            if (ALWAYS) {
+                if (astUtils.isClosingParenToken(right)) {
+                    return false;
+                }
+                return !isOpenerException(right);
+            }
+            return isOpenerException(right);
+
+        }
+
+        /**
+         * Determines if an closer paren should have a missing space after it
+         * @param {Object} left The token before the paren
+         * @param {Object} right The paren token
+         * @returns {boolean} True if the paren should have a space
+         */
+        function shouldCloserHaveSpace(left, right) {
+            if (astUtils.isOpeningParenToken(left)) {
+                return false;
+            }
+
+            if (sourceCode.isSpaceBetweenTokens(left, right)) {
+                return false;
+            }
+
+            if (ALWAYS) {
+                return !isCloserException(left);
+            }
+            return isCloserException(left);
+
+        }
+
+        /**
+         * Determines if an opener paren should not have an existing space after it
+         * @param {Object} left The paren token
+         * @param {Object} right The token after it
+         * @returns {boolean} True if the paren should reject the space
+         */
+        function shouldOpenerRejectSpace(left, right) {
+            if (right.type === "Line") {
+                return false;
+            }
+
+            if (!astUtils.isTokenOnSameLine(left, right)) {
+                return false;
+            }
+
+            if (!sourceCode.isSpaceBetweenTokens(left, right)) {
+                return false;
+            }
+
+            if (ALWAYS) {
+                return isOpenerException(right);
+            }
+            return !isOpenerException(right);
+
+        }
+
+        /**
+         * Determines if an closer paren should not have an existing space after it
+         * @param {Object} left The token before the paren
+         * @param {Object} right The paren token
+         * @returns {boolean} True if the paren should reject the space
+         */
+        function shouldCloserRejectSpace(left, right) {
+            if (astUtils.isOpeningParenToken(left)) {
+                return false;
+            }
+
+            if (!astUtils.isTokenOnSameLine(left, right)) {
+                return false;
+            }
+
+            if (!sourceCode.isSpaceBetweenTokens(left, right)) {
+                return false;
+            }
+
+            if (ALWAYS) {
+                return isCloserException(left);
+            }
+            return !isCloserException(left);
+
+        }
+
+        //--------------------------------------------------------------------------
+        // 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 (!astUtils.isOpeningParenToken(token) && !astUtils.isClosingParenToken(token)) {
+                        return;
+                    }
+
+                    if (token.value === "(" && shouldOpenerHaveSpace(token, nextToken)) {
+                        context.report({
+                            node,
+                            loc: token.loc.start,
+                            message: MISSING_SPACE_MESSAGE,
+                            fix(fixer) {
+                                return fixer.insertTextAfter(token, " ");
+                            }
+                        });
+                    } else if (token.value === "(" && shouldOpenerRejectSpace(token, nextToken)) {
+                        context.report({
+                            node,
+                            loc: token.loc.start,
+                            message: REJECTED_SPACE_MESSAGE,
+                            fix(fixer) {
+                                return fixer.removeRange([token.range[1], nextToken.range[0]]);
+                            }
+                        });
+                    } else if (token.value === ")" && shouldCloserHaveSpace(prevToken, token)) {
+
+                        // context.report(node, token.loc.start, MISSING_SPACE_MESSAGE);
+                        context.report({
+                            node,
+                            loc: token.loc.start,
+                            message: MISSING_SPACE_MESSAGE,
+                            fix(fixer) {
+                                return fixer.insertTextBefore(token, " ");
+                            }
+                        });
+                    } else if (token.value === ")" && shouldCloserRejectSpace(prevToken, token)) {
+                        context.report({
+                            node,
+                            loc: token.loc.start,
+                            message: REJECTED_SPACE_MESSAGE,
+                            fix(fixer) {
+                                return fixer.removeRange([prevToken.range[1], token.range[0]]);
+                            }
+                        });
+                    }
+                });
+            }
+        };
+
+    }
+};