Current Dev State

static/js/ketcher2/node_modules/eslint/lib/rules/no-multi-spaces.js

@@ -0,0 +1,147 @@
+/**
+ * @fileoverview Disallow use of multiple spaces.
+ * @author Nicholas C. Zakas
+ */
+
+"use strict";
+
+const astUtils = require("../ast-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        docs: {
+            description: "disallow multiple spaces",
+            category: "Best Practices",
+            recommended: false
+        },
+
+        fixable: "whitespace",
+
+        schema: [
+            {
+                type: "object",
+                properties: {
+                    exceptions: {
+                        type: "object",
+                        patternProperties: {
+                            "^([A-Z][a-z]*)+$": {
+                                type: "boolean"
+                            }
+                        },
+                        additionalProperties: false
+                    }
+                },
+                additionalProperties: false
+            }
+        ]
+    },
+
+    create(context) {
+
+        // the index of the last comment that was checked
+        const exceptions = { Property: true },
+            options = context.options[0];
+        let hasExceptions = true,
+            lastCommentIndex = 0;
+
+        if (options && options.exceptions) {
+            Object.keys(options.exceptions).forEach(key => {
+                if (options.exceptions[key]) {
+                    exceptions[key] = true;
+                } else {
+                    delete exceptions[key];
+                }
+            });
+            hasExceptions = Object.keys(exceptions).length > 0;
+        }
+
+        /**
+         * Determines if a given source index is in a comment or not by checking
+         * the index against the comment range. Since the check goes straight
+         * through the file, once an index is passed a certain comment, we can
+         * go to the next comment to check that.
+         * @param {int} index The source index to check.
+         * @param {ASTNode[]} comments An array of comment nodes.
+         * @returns {boolean} True if the index is within a comment, false if not.
+         * @private
+         */
+        function isIndexInComment(index, comments) {
+            while (lastCommentIndex < comments.length) {
+                const comment = comments[lastCommentIndex];
+
+                if (comment.range[0] <= index && index < comment.range[1]) {
+                    return true;
+                } else if (index > comment.range[1]) {
+                    lastCommentIndex++;
+                } else {
+                    break;
+                }
+            }
+
+            return false;
+        }
+
+        //--------------------------------------------------------------------------
+        // Public
+        //--------------------------------------------------------------------------
+
+        return {
+            Program() {
+
+                const sourceCode = context.getSourceCode(),
+                    source = sourceCode.getText(),
+                    allComments = sourceCode.getAllComments(),
+                    JOINED_LINEBEAKS = Array.from(astUtils.LINEBREAKS).join(""),
+                    pattern = new RegExp(String.raw`[^ \t${JOINED_LINEBEAKS}].? {2,}`, "g");  // note: repeating space
+                let parent;
+
+
+                /**
+                 * Creates a fix function that removes the multiple spaces between the two tokens
+                 * @param {RuleFixer} leftToken left token
+                 * @param {RuleFixer} rightToken right token
+                 * @returns {Function} fix function
+                 * @private
+                 */
+                function createFix(leftToken, rightToken) {
+                    return function(fixer) {
+                        return fixer.replaceTextRange([leftToken.range[1], rightToken.range[0]], " ");
+                    };
+                }
+
+                while (pattern.test(source)) {
+
+                    // do not flag anything inside of comments
+                    if (!isIndexInComment(pattern.lastIndex, allComments)) {
+
+                        const token = sourceCode.getTokenByRangeStart(pattern.lastIndex);
+
+                        if (token) {
+                            const previousToken = sourceCode.getTokenBefore(token);
+
+                            if (hasExceptions) {
+                                parent = sourceCode.getNodeByRangeIndex(pattern.lastIndex - 1);
+                            }
+
+                            if (!parent || !exceptions[parent.type]) {
+                                context.report({
+                                    node: token,
+                                    loc: token.loc.start,
+                                    message: "Multiple spaces found before '{{value}}'.",
+                                    data: { value: token.value },
+                                    fix: createFix(previousToken, token)
+                                });
+                            }
+                        }
+
+                    }
+                }
+            }
+        };
+
+    }
+};