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- 'use strict';
- const isContextFunctionalPseudoClass = require('../../utils/isContextFunctionalPseudoClass');
- const isStandardSyntaxRule = require('../../utils/isStandardSyntaxRule');
- const parseSelector = require('../../utils/parseSelector');
- const report = require('../../utils/report');
- const resolvedNestedSelector = require('postcss-resolve-nested-selector');
- const ruleMessages = require('../../utils/ruleMessages');
- const validateOptions = require('../../utils/validateOptions');
- const ruleName = 'selector-max-class';
- const messages = ruleMessages(ruleName, {
- expected: (selector, max) =>
- `Expected "${selector}" to have no more than ${max} ${max === 1 ? 'class' : 'classes'}`,
- });
- function rule(max) {
- return (root, result) => {
- const validOptions = validateOptions(result, ruleName, {
- actual: max,
- possible: [
- function (max) {
- return typeof max === 'number' && max >= 0;
- },
- ],
- });
- if (!validOptions) {
- return;
- }
- function checkSelector(selectorNode, ruleNode) {
- const count = selectorNode.reduce((total, childNode) => {
-
- if (childNode.type === 'selector' || isContextFunctionalPseudoClass(childNode)) {
- checkSelector(childNode, ruleNode);
- }
- return (total += childNode.type === 'class' ? 1 : 0);
- }, 0);
- if (selectorNode.type !== 'root' && selectorNode.type !== 'pseudo' && count > max) {
- report({
- ruleName,
- result,
- node: ruleNode,
- message: messages.expected(selectorNode, max),
- word: selectorNode,
- });
- }
- }
- root.walkRules((ruleNode) => {
- if (!isStandardSyntaxRule(ruleNode)) {
- return;
- }
- ruleNode.selectors.forEach((selector) => {
- resolvedNestedSelector(selector, ruleNode).forEach((resolvedSelector) => {
- parseSelector(resolvedSelector, result, ruleNode, (container) =>
- checkSelector(container, ruleNode),
- );
- });
- });
- });
- };
- }
- rule.ruleName = ruleName;
- rule.messages = messages;
- module.exports = rule;
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