823 lines
21 KiB
JavaScript
823 lines
21 KiB
JavaScript
/**
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* @fileoverview Rule to specify spacing of object literal keys and values
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* @author Brandon Mills
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* @deprecated in ESLint v8.53.0
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Requirements
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//------------------------------------------------------------------------------
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const astUtils = require("./utils/ast-utils");
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const { getGraphemeCount } = require("../shared/string-utils");
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/**
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* Checks whether a string contains a line terminator as defined in
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* http://www.ecma-international.org/ecma-262/5.1/#sec-7.3
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* @param {string} str String to test.
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* @returns {boolean} True if str contains a line terminator.
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*/
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function containsLineTerminator(str) {
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return astUtils.LINEBREAK_MATCHER.test(str);
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}
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/**
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* Gets the last element of an array.
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* @param {Array} arr An array.
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* @returns {any} Last element of arr.
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*/
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function last(arr) {
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return arr.at(-1);
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}
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/**
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* Checks whether a node is contained on a single line.
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* @param {ASTNode} node AST Node being evaluated.
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* @returns {boolean} True if the node is a single line.
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*/
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function isSingleLine(node) {
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return node.loc.end.line === node.loc.start.line;
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}
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/**
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* Checks whether the properties on a single line.
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* @param {ASTNode[]} properties List of Property AST nodes.
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* @returns {boolean} True if all properties is on a single line.
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*/
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function isSingleLineProperties(properties) {
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const [firstProp] = properties,
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lastProp = last(properties);
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return firstProp.loc.start.line === lastProp.loc.end.line;
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}
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/**
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* Initializes a single option property from the configuration with defaults for undefined values
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* @param {Object} toOptions Object to be initialized
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* @param {Object} fromOptions Object to be initialized from
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* @returns {Object} The object with correctly initialized options and values
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*/
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function initOptionProperty(toOptions, fromOptions) {
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toOptions.mode = fromOptions.mode || "strict";
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// Set value of beforeColon
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if (typeof fromOptions.beforeColon !== "undefined") {
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toOptions.beforeColon = +fromOptions.beforeColon;
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} else {
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toOptions.beforeColon = 0;
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}
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// Set value of afterColon
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if (typeof fromOptions.afterColon !== "undefined") {
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toOptions.afterColon = +fromOptions.afterColon;
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} else {
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toOptions.afterColon = 1;
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}
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// Set align if exists
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if (typeof fromOptions.align !== "undefined") {
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if (typeof fromOptions.align === "object") {
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toOptions.align = fromOptions.align;
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} else {
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// "string"
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toOptions.align = {
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on: fromOptions.align,
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mode: toOptions.mode,
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beforeColon: toOptions.beforeColon,
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afterColon: toOptions.afterColon,
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};
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}
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}
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return toOptions;
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}
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/**
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* Initializes all the option values (singleLine, multiLine and align) from the configuration with defaults for undefined values
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* @param {Object} toOptions Object to be initialized
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* @param {Object} fromOptions Object to be initialized from
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* @returns {Object} The object with correctly initialized options and values
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*/
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function initOptions(toOptions, fromOptions) {
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if (typeof fromOptions.align === "object") {
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// Initialize the alignment configuration
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toOptions.align = initOptionProperty({}, fromOptions.align);
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toOptions.align.on = fromOptions.align.on || "colon";
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toOptions.align.mode = fromOptions.align.mode || "strict";
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toOptions.multiLine = initOptionProperty(
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{},
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fromOptions.multiLine || fromOptions,
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);
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toOptions.singleLine = initOptionProperty(
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{},
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fromOptions.singleLine || fromOptions,
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);
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} else {
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// string or undefined
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toOptions.multiLine = initOptionProperty(
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{},
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fromOptions.multiLine || fromOptions,
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);
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toOptions.singleLine = initOptionProperty(
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{},
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fromOptions.singleLine || fromOptions,
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);
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// If alignment options are defined in multiLine, pull them out into the general align configuration
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if (toOptions.multiLine.align) {
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toOptions.align = {
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on: toOptions.multiLine.align.on,
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mode:
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toOptions.multiLine.align.mode || toOptions.multiLine.mode,
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beforeColon: toOptions.multiLine.align.beforeColon,
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afterColon: toOptions.multiLine.align.afterColon,
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};
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}
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}
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return toOptions;
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}
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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/** @type {import('../types').Rule.RuleModule} */
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module.exports = {
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meta: {
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deprecated: {
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message: "Formatting rules are being moved out of ESLint core.",
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url: "https://eslint.org/blog/2023/10/deprecating-formatting-rules/",
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deprecatedSince: "8.53.0",
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availableUntil: "10.0.0",
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replacedBy: [
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{
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message:
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"ESLint Stylistic now maintains deprecated stylistic core rules.",
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url: "https://eslint.style/guide/migration",
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plugin: {
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name: "@stylistic/eslint-plugin-js",
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url: "https://eslint.style/packages/js",
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},
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rule: {
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name: "key-spacing",
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url: "https://eslint.style/rules/js/key-spacing",
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},
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},
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],
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},
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type: "layout",
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docs: {
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description:
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"Enforce consistent spacing between keys and values in object literal properties",
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recommended: false,
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url: "https://eslint.org/docs/latest/rules/key-spacing",
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},
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fixable: "whitespace",
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schema: [
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{
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anyOf: [
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{
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type: "object",
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properties: {
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align: {
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anyOf: [
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{
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enum: ["colon", "value"],
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},
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{
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type: "object",
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properties: {
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mode: {
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enum: ["strict", "minimum"],
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},
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on: {
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enum: ["colon", "value"],
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},
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beforeColon: {
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type: "boolean",
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},
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afterColon: {
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type: "boolean",
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},
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},
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additionalProperties: false,
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},
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],
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},
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mode: {
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enum: ["strict", "minimum"],
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},
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beforeColon: {
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type: "boolean",
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},
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afterColon: {
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type: "boolean",
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},
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},
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additionalProperties: false,
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},
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{
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type: "object",
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properties: {
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singleLine: {
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type: "object",
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properties: {
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mode: {
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enum: ["strict", "minimum"],
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},
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beforeColon: {
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type: "boolean",
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},
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afterColon: {
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type: "boolean",
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},
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},
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additionalProperties: false,
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},
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multiLine: {
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type: "object",
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properties: {
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align: {
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anyOf: [
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{
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enum: ["colon", "value"],
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},
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{
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type: "object",
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properties: {
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mode: {
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enum: [
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"strict",
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"minimum",
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],
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},
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on: {
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enum: [
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"colon",
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"value",
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],
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},
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beforeColon: {
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type: "boolean",
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},
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afterColon: {
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type: "boolean",
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},
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},
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additionalProperties: false,
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},
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],
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},
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mode: {
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enum: ["strict", "minimum"],
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},
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beforeColon: {
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type: "boolean",
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},
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afterColon: {
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type: "boolean",
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},
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},
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additionalProperties: false,
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},
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},
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additionalProperties: false,
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},
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{
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type: "object",
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properties: {
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singleLine: {
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type: "object",
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properties: {
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mode: {
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enum: ["strict", "minimum"],
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},
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beforeColon: {
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type: "boolean",
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},
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afterColon: {
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type: "boolean",
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},
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},
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additionalProperties: false,
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},
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multiLine: {
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type: "object",
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properties: {
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mode: {
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enum: ["strict", "minimum"],
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},
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beforeColon: {
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type: "boolean",
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},
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afterColon: {
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type: "boolean",
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},
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},
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additionalProperties: false,
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},
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align: {
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type: "object",
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properties: {
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mode: {
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enum: ["strict", "minimum"],
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},
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on: {
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enum: ["colon", "value"],
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},
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beforeColon: {
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type: "boolean",
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},
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afterColon: {
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type: "boolean",
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},
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},
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additionalProperties: false,
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},
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},
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additionalProperties: false,
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},
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],
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},
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],
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messages: {
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extraKey: "Extra space after {{computed}}key '{{key}}'.",
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extraValue:
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"Extra space before value for {{computed}}key '{{key}}'.",
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missingKey: "Missing space after {{computed}}key '{{key}}'.",
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missingValue:
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"Missing space before value for {{computed}}key '{{key}}'.",
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},
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},
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create(context) {
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/**
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* OPTIONS
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* "key-spacing": [2, {
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* beforeColon: false,
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* afterColon: true,
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* align: "colon" // Optional, or "value"
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* }
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*/
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const options = context.options[0] || {},
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ruleOptions = initOptions({}, options),
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multiLineOptions = ruleOptions.multiLine,
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singleLineOptions = ruleOptions.singleLine,
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alignmentOptions = ruleOptions.align || null;
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const sourceCode = context.sourceCode;
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/**
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* Determines if the given property is key-value property.
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* @param {ASTNode} property Property node to check.
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* @returns {boolean} Whether the property is a key-value property.
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*/
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function isKeyValueProperty(property) {
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return !(
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(
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property.method ||
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property.shorthand ||
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property.kind !== "init" ||
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property.type !== "Property"
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) // Could be "ExperimentalSpreadProperty" or "SpreadElement"
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);
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}
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/**
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* Starting from the given node (a property.key node here) looks forward
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* until it finds the colon punctuator and returns it.
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* @param {ASTNode} node The node to start looking from.
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* @returns {ASTNode} The colon punctuator.
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*/
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function getNextColon(node) {
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return sourceCode.getTokenAfter(node, astUtils.isColonToken);
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}
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/**
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* Starting from the given node (a property.key node here) looks forward
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* until it finds the last token before a colon punctuator and returns it.
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* @param {ASTNode} node The node to start looking from.
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* @returns {ASTNode} The last token before a colon punctuator.
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*/
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function getLastTokenBeforeColon(node) {
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const colonToken = getNextColon(node);
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return sourceCode.getTokenBefore(colonToken);
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}
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/**
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* Starting from the given node (a property.key node here) looks forward
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* until it finds the first token after a colon punctuator and returns it.
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* @param {ASTNode} node The node to start looking from.
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* @returns {ASTNode} The first token after a colon punctuator.
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*/
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function getFirstTokenAfterColon(node) {
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const colonToken = getNextColon(node);
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return sourceCode.getTokenAfter(colonToken);
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}
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/**
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* Checks whether a property is a member of the property group it follows.
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* @param {ASTNode} lastMember The last Property known to be in the group.
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* @param {ASTNode} candidate The next Property that might be in the group.
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* @returns {boolean} True if the candidate property is part of the group.
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*/
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function continuesPropertyGroup(lastMember, candidate) {
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const groupEndLine = lastMember.loc.start.line,
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candidateValueStartLine = (
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isKeyValueProperty(candidate)
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? getFirstTokenAfterColon(candidate.key)
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: candidate
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).loc.start.line;
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if (candidateValueStartLine - groupEndLine <= 1) {
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return true;
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}
|
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|
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/*
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* Check that the first comment is adjacent to the end of the group, the
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* last comment is adjacent to the candidate property, and that successive
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* comments are adjacent to each other.
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*/
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const leadingComments = sourceCode.getCommentsBefore(candidate);
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if (
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leadingComments.length &&
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leadingComments[0].loc.start.line - groupEndLine <= 1 &&
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candidateValueStartLine - last(leadingComments).loc.end.line <=
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1
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) {
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for (let i = 1; i < leadingComments.length; i++) {
|
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if (
|
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leadingComments[i].loc.start.line -
|
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leadingComments[i - 1].loc.end.line >
|
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1
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) {
|
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return false;
|
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}
|
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}
|
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return true;
|
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}
|
|
|
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return false;
|
|
}
|
|
|
|
/**
|
|
* Gets an object literal property's key as the identifier name or string value.
|
|
* @param {ASTNode} property Property node whose key to retrieve.
|
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* @returns {string} The property's key.
|
|
*/
|
|
function getKey(property) {
|
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const key = property.key;
|
|
|
|
if (property.computed) {
|
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return sourceCode.getText().slice(key.range[0], key.range[1]);
|
|
}
|
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return astUtils.getStaticPropertyName(property);
|
|
}
|
|
|
|
/**
|
|
* Reports an appropriately-formatted error if spacing is incorrect on one
|
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* side of the colon.
|
|
* @param {ASTNode} property Key-value pair in an object literal.
|
|
* @param {string} side Side being verified - either "key" or "value".
|
|
* @param {string} whitespace Actual whitespace string.
|
|
* @param {int} expected Expected whitespace length.
|
|
* @param {string} mode Value of the mode as "strict" or "minimum"
|
|
* @returns {void}
|
|
*/
|
|
function report(property, side, whitespace, expected, mode) {
|
|
const diff = whitespace.length - expected;
|
|
|
|
if (
|
|
((diff && mode === "strict") ||
|
|
(diff < 0 && mode === "minimum") ||
|
|
(diff > 0 && !expected && mode === "minimum")) &&
|
|
!(expected && containsLineTerminator(whitespace))
|
|
) {
|
|
const nextColon = getNextColon(property.key),
|
|
tokenBeforeColon = sourceCode.getTokenBefore(nextColon, {
|
|
includeComments: true,
|
|
}),
|
|
tokenAfterColon = sourceCode.getTokenAfter(nextColon, {
|
|
includeComments: true,
|
|
}),
|
|
isKeySide = side === "key",
|
|
isExtra = diff > 0,
|
|
diffAbs = Math.abs(diff),
|
|
spaces = Array(diffAbs + 1).join(" ");
|
|
|
|
const locStart = isKeySide
|
|
? tokenBeforeColon.loc.end
|
|
: nextColon.loc.start;
|
|
const locEnd = isKeySide
|
|
? nextColon.loc.start
|
|
: tokenAfterColon.loc.start;
|
|
const missingLoc = isKeySide
|
|
? tokenBeforeColon.loc
|
|
: tokenAfterColon.loc;
|
|
const loc = isExtra
|
|
? { start: locStart, end: locEnd }
|
|
: missingLoc;
|
|
|
|
let fix;
|
|
|
|
if (isExtra) {
|
|
let range;
|
|
|
|
// Remove whitespace
|
|
if (isKeySide) {
|
|
range = [
|
|
tokenBeforeColon.range[1],
|
|
tokenBeforeColon.range[1] + diffAbs,
|
|
];
|
|
} else {
|
|
range = [
|
|
tokenAfterColon.range[0] - diffAbs,
|
|
tokenAfterColon.range[0],
|
|
];
|
|
}
|
|
fix = function (fixer) {
|
|
return fixer.removeRange(range);
|
|
};
|
|
} else {
|
|
// Add whitespace
|
|
if (isKeySide) {
|
|
fix = function (fixer) {
|
|
return fixer.insertTextAfter(
|
|
tokenBeforeColon,
|
|
spaces,
|
|
);
|
|
};
|
|
} else {
|
|
fix = function (fixer) {
|
|
return fixer.insertTextBefore(
|
|
tokenAfterColon,
|
|
spaces,
|
|
);
|
|
};
|
|
}
|
|
}
|
|
|
|
let messageId;
|
|
|
|
if (isExtra) {
|
|
messageId = side === "key" ? "extraKey" : "extraValue";
|
|
} else {
|
|
messageId = side === "key" ? "missingKey" : "missingValue";
|
|
}
|
|
|
|
context.report({
|
|
node: property[side],
|
|
loc,
|
|
messageId,
|
|
data: {
|
|
computed: property.computed ? "computed " : "",
|
|
key: getKey(property),
|
|
},
|
|
fix,
|
|
});
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Gets the number of characters in a key, including quotes around string
|
|
* keys and braces around computed property keys.
|
|
* @param {ASTNode} property Property of on object literal.
|
|
* @returns {int} Width of the key.
|
|
*/
|
|
function getKeyWidth(property) {
|
|
const startToken = sourceCode.getFirstToken(property);
|
|
const endToken = getLastTokenBeforeColon(property.key);
|
|
|
|
return getGraphemeCount(
|
|
sourceCode
|
|
.getText()
|
|
.slice(startToken.range[0], endToken.range[1]),
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Gets the whitespace around the colon in an object literal property.
|
|
* @param {ASTNode} property Property node from an object literal.
|
|
* @returns {Object} Whitespace before and after the property's colon.
|
|
*/
|
|
function getPropertyWhitespace(property) {
|
|
const whitespace = /(\s*):(\s*)/u.exec(
|
|
sourceCode
|
|
.getText()
|
|
.slice(property.key.range[1], property.value.range[0]),
|
|
);
|
|
|
|
if (whitespace) {
|
|
return {
|
|
beforeColon: whitespace[1],
|
|
afterColon: whitespace[2],
|
|
};
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Creates groups of properties.
|
|
* @param {ASTNode} node ObjectExpression node being evaluated.
|
|
* @returns {Array<ASTNode[]>} Groups of property AST node lists.
|
|
*/
|
|
function createGroups(node) {
|
|
if (node.properties.length === 1) {
|
|
return [node.properties];
|
|
}
|
|
|
|
return node.properties.reduce(
|
|
(groups, property) => {
|
|
const currentGroup = last(groups),
|
|
prev = last(currentGroup);
|
|
|
|
if (!prev || continuesPropertyGroup(prev, property)) {
|
|
currentGroup.push(property);
|
|
} else {
|
|
groups.push([property]);
|
|
}
|
|
|
|
return groups;
|
|
},
|
|
[[]],
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Verifies correct vertical alignment of a group of properties.
|
|
* @param {ASTNode[]} properties List of Property AST nodes.
|
|
* @returns {void}
|
|
*/
|
|
function verifyGroupAlignment(properties) {
|
|
const length = properties.length,
|
|
widths = properties.map(getKeyWidth), // Width of keys, including quotes
|
|
align = alignmentOptions.on; // "value" or "colon"
|
|
let targetWidth = Math.max(...widths),
|
|
beforeColon,
|
|
afterColon,
|
|
mode;
|
|
|
|
if (alignmentOptions && length > 1) {
|
|
// When aligning values within a group, use the alignment configuration.
|
|
beforeColon = alignmentOptions.beforeColon;
|
|
afterColon = alignmentOptions.afterColon;
|
|
mode = alignmentOptions.mode;
|
|
} else {
|
|
beforeColon = multiLineOptions.beforeColon;
|
|
afterColon = multiLineOptions.afterColon;
|
|
mode = alignmentOptions.mode;
|
|
}
|
|
|
|
// Conditionally include one space before or after colon
|
|
targetWidth += align === "colon" ? beforeColon : afterColon;
|
|
|
|
for (let i = 0; i < length; i++) {
|
|
const property = properties[i];
|
|
const whitespace = getPropertyWhitespace(property);
|
|
|
|
if (whitespace) {
|
|
// Object literal getters/setters lack a colon
|
|
const width = widths[i];
|
|
|
|
if (align === "value") {
|
|
report(
|
|
property,
|
|
"key",
|
|
whitespace.beforeColon,
|
|
beforeColon,
|
|
mode,
|
|
);
|
|
report(
|
|
property,
|
|
"value",
|
|
whitespace.afterColon,
|
|
targetWidth - width,
|
|
mode,
|
|
);
|
|
} else {
|
|
// align = "colon"
|
|
report(
|
|
property,
|
|
"key",
|
|
whitespace.beforeColon,
|
|
targetWidth - width,
|
|
mode,
|
|
);
|
|
report(
|
|
property,
|
|
"value",
|
|
whitespace.afterColon,
|
|
afterColon,
|
|
mode,
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Verifies spacing of property conforms to specified options.
|
|
* @param {ASTNode} node Property node being evaluated.
|
|
* @param {Object} lineOptions Configured singleLine or multiLine options
|
|
* @returns {void}
|
|
*/
|
|
function verifySpacing(node, lineOptions) {
|
|
const actual = getPropertyWhitespace(node);
|
|
|
|
if (actual) {
|
|
// Object literal getters/setters lack colons
|
|
report(
|
|
node,
|
|
"key",
|
|
actual.beforeColon,
|
|
lineOptions.beforeColon,
|
|
lineOptions.mode,
|
|
);
|
|
report(
|
|
node,
|
|
"value",
|
|
actual.afterColon,
|
|
lineOptions.afterColon,
|
|
lineOptions.mode,
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Verifies spacing of each property in a list.
|
|
* @param {ASTNode[]} properties List of Property AST nodes.
|
|
* @param {Object} lineOptions Configured singleLine or multiLine options
|
|
* @returns {void}
|
|
*/
|
|
function verifyListSpacing(properties, lineOptions) {
|
|
const length = properties.length;
|
|
|
|
for (let i = 0; i < length; i++) {
|
|
verifySpacing(properties[i], lineOptions);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Verifies vertical alignment, taking into account groups of properties.
|
|
* @param {ASTNode} node ObjectExpression node being evaluated.
|
|
* @returns {void}
|
|
*/
|
|
function verifyAlignment(node) {
|
|
createGroups(node).forEach(group => {
|
|
const properties = group.filter(isKeyValueProperty);
|
|
|
|
if (
|
|
properties.length > 0 &&
|
|
isSingleLineProperties(properties)
|
|
) {
|
|
verifyListSpacing(properties, multiLineOptions);
|
|
} else {
|
|
verifyGroupAlignment(properties);
|
|
}
|
|
});
|
|
}
|
|
|
|
//--------------------------------------------------------------------------
|
|
// Public API
|
|
//--------------------------------------------------------------------------
|
|
|
|
if (alignmentOptions) {
|
|
// Verify vertical alignment
|
|
|
|
return {
|
|
ObjectExpression(node) {
|
|
if (isSingleLine(node)) {
|
|
verifyListSpacing(
|
|
node.properties.filter(isKeyValueProperty),
|
|
singleLineOptions,
|
|
);
|
|
} else {
|
|
verifyAlignment(node);
|
|
}
|
|
},
|
|
};
|
|
}
|
|
|
|
// Obey beforeColon and afterColon in each property as configured
|
|
return {
|
|
Property(node) {
|
|
verifySpacing(
|
|
node,
|
|
isSingleLine(node.parent)
|
|
? singleLineOptions
|
|
: multiLineOptions,
|
|
);
|
|
},
|
|
};
|
|
},
|
|
};
|