+++ /dev/null
-"use strict";
-
-const isStandardSyntaxRule = require("../../utils/isStandardSyntaxRule");
-const isStandardSyntaxSelector = require("../../utils/isStandardSyntaxSelector");
-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-combinators";
-
-const messages = ruleMessages(ruleName, {
- expected: (selector, max) =>
- `Expected "${selector}" to have no more than ${max} ${
- max === 1 ? "combinator" : "combinators"
- }`
-});
-
-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) => {
- // Only traverse inside actual selectors
- if (childNode.type === "selector") {
- checkSelector(childNode, ruleNode);
- }
-
- return (total += childNode.type === "combinator" ? 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;
- }
- if (!isStandardSyntaxSelector(ruleNode.selector)) {
- return;
- }
- if (
- ruleNode.nodes.some(
- node => ["rule", "atrule"].indexOf(node.type) !== -1
- )
- ) {
- // Skip unresolved nested selectors
- 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;