--- /dev/null
+"use strict";
+
+const _ = require("lodash");
+const htmlTags = require("html-tags");
+const isCustomElement = require("../../utils/isCustomElement");
+const isKeyframeSelector = require("../../utils/isKeyframeSelector");
+const isStandardSyntaxRule = require("../../utils/isStandardSyntaxRule");
+const isStandardSyntaxSelector = require("../../utils/isStandardSyntaxSelector");
+const isStandardSyntaxTypeSelector = require("../../utils/isStandardSyntaxTypeSelector");
+const keywordSets = require("../../reference/keywordSets");
+const mathMLTags = require("mathml-tag-names");
+const optionsMatches = require("../../utils/optionsMatches");
+const parseSelector = require("../../utils/parseSelector");
+const report = require("../../utils/report");
+const ruleMessages = require("../../utils/ruleMessages");
+const svgTags = require("svg-tags");
+const validateOptions = require("../../utils/validateOptions");
+
+const ruleName = "selector-type-no-unknown";
+
+const messages = ruleMessages(ruleName, {
+ rejected: selector => `Unexpected unknown type selector "${selector}"`
+});
+
+const rule = function(actual, options) {
+ return (root, result) => {
+ const validOptions = validateOptions(
+ result,
+ ruleName,
+ { actual },
+ {
+ actual: options,
+ possible: {
+ ignore: ["custom-elements", "default-namespace"],
+ ignoreNamespaces: [_.isString],
+ ignoreTypes: [_.isString]
+ },
+ optional: true
+ }
+ );
+ if (!validOptions) {
+ return;
+ }
+
+ root.walkRules(rule => {
+ const selector = rule.selector,
+ selectors = rule.selectors;
+
+ if (!isStandardSyntaxRule(rule)) {
+ return;
+ }
+ if (!isStandardSyntaxSelector(selector)) {
+ return;
+ }
+ if (selectors.some(s => isKeyframeSelector(s))) {
+ return;
+ }
+
+ parseSelector(selector, result, rule, selectorTree => {
+ selectorTree.walkTags(tagNode => {
+ if (!isStandardSyntaxTypeSelector(tagNode)) {
+ return;
+ }
+
+ if (
+ optionsMatches(options, "ignore", "custom-elements") &&
+ isCustomElement(tagNode.value)
+ ) {
+ return;
+ }
+
+ if (
+ optionsMatches(options, "ignore", "default-namespace") &&
+ !(typeof tagNode.namespace === "string")
+ ) {
+ return;
+ }
+
+ if (optionsMatches(options, "ignoreNamespaces", tagNode.namespace)) {
+ return;
+ }
+
+ if (optionsMatches(options, "ignoreTypes", tagNode.value)) {
+ return;
+ }
+
+ const tagName = tagNode.value;
+ const tagNameLowerCase = tagName.toLowerCase();
+
+ if (
+ htmlTags.indexOf(tagNameLowerCase) !== -1 ||
+ svgTags.indexOf(tagNameLowerCase) !== -1 ||
+ keywordSets.nonStandardHtmlTags.has(tagNameLowerCase) ||
+ mathMLTags.indexOf(tagNameLowerCase) !== -1
+ ) {
+ return;
+ }
+
+ report({
+ message: messages.rejected(tagName),
+ node: rule,
+ index: tagNode.sourceIndex,
+ ruleName,
+ result
+ });
+ });
+ });
+ });
+ };
+};
+
+rule.ruleName = ruleName;
+rule.messages = messages;
+module.exports = rule;