DevTools: Introduce ARIAUtils

third_party/WebKit/Source/devtools/front_end/ui/ARIAUtils.js

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+UI.ARIAUtils = {};
+
+/**
+ * @param {!Element} element
+ */
+UI.ARIAUtils.markAsTab = function(element) {
+  element.setAttribute('role', 'tab');
+};
+
+/**
+ * @param {!Element} element
+ * @param {boolean} value
+ */
+UI.ARIAUtils.setSelected = function(element, value) {
+  // aria-selected behaves differently for false and undefined.
+  // Often times undefined values are unintentionally typed as booleans.
+  // Use !! to make sure this is true or false.
+  element.setAttribute('aria-selected', !!value);
+};
+
+/**
+ * @param {!Element} element
+ * @param {boolean} value
+ */
+UI.ARIAUtils.setPressed = function(element, value) {
+  // aria-pressed behaves differently for false and undefined.
+  // Often times undefined values are unintentionally typed as booleans.
+  // Use !! to make sure this is true or false.
+  element.setAttribute('aria-pressed', !!value);
+};
+
+/**
+ * @param {!Element} element
+ * @param {string} name
+ */
+UI.ARIAUtils.setAccessibleName = function(element, name) {
+  element.setAttribute('aria-label', name);
+};