91 lines
3.1 KiB
JavaScript
91 lines
3.1 KiB
JavaScript
|
/**
|
||
|
|
* @fileoverview Enforce newlines between operands of ternary expressions
|
||
|
|
* @author Kai Cataldo
|
||
|
|
*/
|
||
|
|
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
const astUtils = require("../ast-utils");
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// Rule Definition
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
module.exports = {
|
||
|
|
meta: {
|
||
|
|
docs: {
|
||
|
|
description: "enforce newlines between operands of ternary expressions",
|
||
|
|
category: "Stylistic Issues",
|
||
|
|
recommended: false,
|
||
|
|
url: "https://eslint.org/docs/rules/multiline-ternary"
|
||
|
|
},
|
||
|
|
schema: [
|
||
|
|
{
|
||
|
|
enum: ["always", "always-multiline", "never"]
|
||
|
|
}
|
||
|
|
]
|
||
|
|
},
|
||
|
|
|
||
|
|
create(context) {
|
||
|
|
const option = context.options[0];
|
||
|
|
const multiline = option !== "never";
|
||
|
|
const allowSingleLine = option === "always-multiline";
|
||
|
|
|
||
|
|
//--------------------------------------------------------------------------
|
||
|
|
// Helpers
|
||
|
|
//--------------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Tests whether node is preceded by supplied tokens
|
||
|
|
* @param {ASTNode} node - node to check
|
||
|
|
* @param {ASTNode} parentNode - parent of node to report
|
||
|
|
* @param {boolean} expected - whether newline was expected or not
|
||
|
|
* @returns {void}
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
function reportError(node, parentNode, expected) {
|
||
|
|
context.report({
|
||
|
|
node,
|
||
|
|
message: "{{expected}} newline between {{typeOfError}} of ternary expression.",
|
||
|
|
data: {
|
||
|
|
expected: expected ? "Expected" : "Unexpected",
|
||
|
|
typeOfError: node === parentNode.test ? "test and consequent" : "consequent and alternate"
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
//--------------------------------------------------------------------------
|
||
|
|
// Public
|
||
|
|
//--------------------------------------------------------------------------
|
||
|
|
|
||
|
|
return {
|
||
|
|
ConditionalExpression(node) {
|
||
|
|
const areTestAndConsequentOnSameLine = astUtils.isTokenOnSameLine(node.test, node.consequent);
|
||
|
|
const areConsequentAndAlternateOnSameLine = astUtils.isTokenOnSameLine(node.consequent, node.alternate);
|
||
|
|
|
||
|
|
if (!multiline) {
|
||
|
|
if (!areTestAndConsequentOnSameLine) {
|
||
|
|
reportError(node.test, node, false);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!areConsequentAndAlternateOnSameLine) {
|
||
|
|
reportError(node.consequent, node, false);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if (allowSingleLine && node.loc.start.line === node.loc.end.line) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (areTestAndConsequentOnSameLine) {
|
||
|
|
reportError(node.test, node, true);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (areConsequentAndAlternateOnSameLine) {
|
||
|
|
reportError(node.consequent, node, true);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
};
|