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102 lines
3.0 KiB
102 lines
3.0 KiB
2 years ago
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/**
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* @fileoverview Require or prevent a new line after jsx elements and expressions.
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* @author Johnny Zabala
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* @author Joseph Stiles
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*/
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'use strict';
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const docsUrl = require('../util/docsUrl');
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const report = require('../util/report');
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// ------------------------------------------------------------------------------
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// Rule Definition
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// ------------------------------------------------------------------------------
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const messages = {
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require: 'JSX element should start in a new line',
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prevent: 'JSX element should not start in a new line',
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};
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module.exports = {
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meta: {
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docs: {
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description: 'Require or prevent a new line after jsx elements and expressions.',
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category: 'Stylistic Issues',
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recommended: false,
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url: docsUrl('jsx-newline'),
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},
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fixable: 'code',
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messages,
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schema: [
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{
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type: 'object',
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properties: {
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prevent: {
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default: false,
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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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create(context) {
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const jsxElementParents = new Set();
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const sourceCode = context.getSourceCode();
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return {
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'Program:exit'() {
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jsxElementParents.forEach((parent) => {
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parent.children.forEach((element, index, elements) => {
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if (element.type === 'JSXElement' || element.type === 'JSXExpressionContainer') {
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const firstAdjacentSibling = elements[index + 1];
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const secondAdjacentSibling = elements[index + 2];
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const hasSibling = firstAdjacentSibling
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&& secondAdjacentSibling
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&& (firstAdjacentSibling.type === 'Literal' || firstAdjacentSibling.type === 'JSXText');
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if (!hasSibling) return;
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// Check adjacent sibling has the proper amount of newlines
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const isWithoutNewLine = !/\n\s*\n/.test(firstAdjacentSibling.value);
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const prevent = !!(context.options[0] || {}).prevent;
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if (isWithoutNewLine === prevent) return;
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const messageId = prevent
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? 'prevent'
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: 'require';
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const regex = prevent
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? /(\n\n)(?!.*\1)/g
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: /(\n)(?!.*\1)/g;
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const replacement = prevent
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? '\n'
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: '\n\n';
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report(context, messages[messageId], messageId, {
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node: secondAdjacentSibling,
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fix(fixer) {
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return fixer.replaceText(
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firstAdjacentSibling,
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// double or remove the last newline
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sourceCode.getText(firstAdjacentSibling)
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.replace(regex, replacement)
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);
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},
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});
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}
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});
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});
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},
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':matches(JSXElement, JSXFragment) > :matches(JSXElement, JSXExpressionContainer)': (node) => {
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jsxElementParents.add(node.parent);
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},
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};
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},
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};
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