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/**
* @fileoverview Validates newlines before and after dots
* @author Greg Cochard
* @deprecated in ESLint v8.53.0
*/
"use strict";
const astUtils = require("./utils/ast-utils");
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
/** @type {import('../shared/types').Rule} */
module.exports = {
meta: {
deprecated: {
message: "Formatting rules are being moved out of ESLint core.",
url: "https://eslint.org/blog/2023/10/deprecating-formatting-rules/",
deprecatedSince: "8.53.0",
availableUntil: "10.0.0",
replacedBy: [
{
message: "ESLint Stylistic now maintains deprecated stylistic core rules.",
url: "https://eslint.style/guide/migration",
plugin: {
name: "@stylistic/eslint-plugin-js",
url: "https://eslint.style/packages/js"
},
rule: {
name: "dot-location",
url: "https://eslint.style/rules/js/dot-location"
}
}
]
},
type: "layout",
docs: {
description: "Enforce consistent newlines before and after dots",
recommended: false,
url: "https://eslint.org/docs/latest/rules/dot-location"
},
schema: [
{
enum: ["object", "property"]
}
],
fixable: "code",
messages: {
expectedDotAfterObject: "Expected dot to be on same line as object.",
expectedDotBeforeProperty: "Expected dot to be on same line as property."
}
},
create(context) {
const config = context.options[0];
// default to onObject if no preference is passed
const onObject = config === "object" || !config;
const sourceCode = context.sourceCode;
/**
* Reports if the dot between object and property is on the correct location.
* @param {ASTNode} node The `MemberExpression` node.
* @returns {void}
*/
function checkDotLocation(node) {
const property = node.property;
const dotToken = sourceCode.getTokenBefore(property);
if (onObject) {
// `obj` expression can be parenthesized, but those paren tokens are not a part of the `obj` node.
const tokenBeforeDot = sourceCode.getTokenBefore(dotToken);
if (!astUtils.isTokenOnSameLine(tokenBeforeDot, dotToken)) {
context.report({
node,
loc: dotToken.loc,
messageId: "expectedDotAfterObject",
*fix(fixer) {
if (dotToken.value.startsWith(".") && astUtils.isDecimalIntegerNumericToken(tokenBeforeDot)) {
yield fixer.insertTextAfter(tokenBeforeDot, ` ${dotToken.value}`);
} else {
yield fixer.insertTextAfter(tokenBeforeDot, dotToken.value);
}
yield fixer.remove(dotToken);
}
});
}
} else if (!astUtils.isTokenOnSameLine(dotToken, property)) {
context.report({
node,
loc: dotToken.loc,
messageId: "expectedDotBeforeProperty",
*fix(fixer) {
yield fixer.remove(dotToken);
yield fixer.insertTextBefore(property, dotToken.value);
}
});
}
}
/**
* Checks the spacing of the dot within a member expression.
* @param {ASTNode} node The node to check.
* @returns {void}
*/
function checkNode(node) {
if (!node.computed) {
checkDotLocation(node);
}
}
return {
MemberExpression: checkNode
};
}
};