123 lines
4.2 KiB
JavaScript
123 lines
4.2 KiB
JavaScript
/**
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* @fileoverview Rule to enforce line breaks between arguments of a function call
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* @author Alexey Gonchar <https://github.com/finico>
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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module.exports = {
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meta: {
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type: "layout",
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docs: {
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description: "enforce line breaks between arguments of a function call",
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category: "Stylistic Issues",
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recommended: false,
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url: "https://eslint.org/docs/rules/function-call-argument-newline"
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},
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fixable: "whitespace",
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schema: [
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{
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enum: ["always", "never", "consistent"]
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}
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],
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messages: {
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unexpectedLineBreak: "There should be no line break here.",
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missingLineBreak: "There should be a line break after this argument."
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}
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},
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create(context) {
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const sourceCode = context.getSourceCode();
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const checkers = {
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unexpected: {
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messageId: "unexpectedLineBreak",
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check: (prevToken, currentToken) => prevToken.loc.end.line !== currentToken.loc.start.line,
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createFix: (token, tokenBefore) => fixer =>
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fixer.replaceTextRange([tokenBefore.range[1], token.range[0]], " ")
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},
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missing: {
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messageId: "missingLineBreak",
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check: (prevToken, currentToken) => prevToken.loc.end.line === currentToken.loc.start.line,
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createFix: (token, tokenBefore) => fixer =>
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fixer.replaceTextRange([tokenBefore.range[1], token.range[0]], "\n")
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}
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};
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/**
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* Check all arguments for line breaks in the CallExpression
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* @param {CallExpression} node node to evaluate
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* @param {{ messageId: string, check: Function }} checker selected checker
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* @returns {void}
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* @private
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*/
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function checkArguments(node, checker) {
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for (let i = 1; i < node.arguments.length; i++) {
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const prevArgToken = sourceCode.getLastToken(node.arguments[i - 1]);
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const currentArgToken = sourceCode.getFirstToken(node.arguments[i]);
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if (checker.check(prevArgToken, currentArgToken)) {
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const tokenBefore = sourceCode.getTokenBefore(
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currentArgToken,
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{ includeComments: true }
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);
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const hasLineCommentBefore = tokenBefore.type === "Line";
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context.report({
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node,
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loc: {
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start: tokenBefore.loc.end,
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end: currentArgToken.loc.start
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},
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messageId: checker.messageId,
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fix: hasLineCommentBefore ? null : checker.createFix(currentArgToken, tokenBefore)
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});
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}
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}
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}
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/**
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* Check if open space is present in a function name
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* @param {CallExpression} node node to evaluate
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* @returns {void}
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* @private
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*/
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function check(node) {
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if (node.arguments.length < 2) {
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return;
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}
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const option = context.options[0] || "always";
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if (option === "never") {
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checkArguments(node, checkers.unexpected);
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} else if (option === "always") {
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checkArguments(node, checkers.missing);
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} else if (option === "consistent") {
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const firstArgToken = sourceCode.getLastToken(node.arguments[0]);
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const secondArgToken = sourceCode.getFirstToken(node.arguments[1]);
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if (firstArgToken.loc.end.line === secondArgToken.loc.start.line) {
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checkArguments(node, checkers.unexpected);
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} else {
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checkArguments(node, checkers.missing);
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}
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}
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}
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return {
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CallExpression: check,
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NewExpression: check
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};
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}
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};
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