--- /dev/null
+// Copyright 2014 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+goog.require('axs.AuditRule');
+goog.require('axs.AuditRules');
+goog.require('axs.constants.Severity');
+
+/**
+ * @type {axs.AuditRule.Spec}
+ */
+axs.AuditRule.specs.ariaOwnsDescendant = {
+ // TODO(RickSBrown): check for elements that try to 'aria-own' an ancestor;
+ name: 'ariaOwnsDescendant',
+ heading: 'aria-owns should not be used if ownership is implicit in the DOM',
+ url: '', // TODO(RickSBrown): talk to Alice about wiki for this (I don't think I can add?);
+ severity: axs.constants.Severity.WARNING,
+ relevantElementMatcher: function(element) {
+ return axs.browserUtils.matchSelector(element, '[aria-owns]');
+ },
+ test: function(element) {
+ var document = element.ownerDocument;
+ var owns = element.getAttribute('aria-owns');
+ var ownedIds = owns.split(/\s+/);
+ for (var i = 0, len = ownedIds.length; i < len; i++) {
+ var ownedElement = document.getElementById(ownedIds[i]);
+ if (ownedElement &&
+ (element.compareDocumentPosition(ownedElement) & Node.DOCUMENT_POSITION_CONTAINED_BY)) {
+ return true;
+ }
+ }
+ return false;
+ },
+ code: 'AX_ARIA_06'
+};