DevTools: Add autocomplete for ARIA

third_party/WebKit/Source/devtools/front_end/accessibility/ARIAMetadata.js

+// Copyright (c) 2016 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.
+
+/**
+ * @constructor
+ * @param {?Object} config
+ */
+WebInspector.ARIAMetadata = function(config)
+{
+    /** @type {!Map<string, !WebInspector.ARIAMetadata.Attribute>} */
+    this._attributes = new Map();
+
+    if (config)
+        this._initialize(config);
+}
+
+/**
+ * @return {!WebInspector.ARIAMetadata}
+ */
+WebInspector.ariaMetadata = function()
+{
+    if (!WebInspector.ARIAMetadata._instance)
+        WebInspector.ARIAMetadata._instance = new WebInspector.ARIAMetadata(WebInspector.ARIAMetadata.config);
+    return WebInspector.ARIAMetadata._instance;
+};
+
+WebInspector.ARIAMetadata.prototype = {
+    /**
+     * @param {!Object} config
+     */
+    _initialize: function(config)
+    {
+        var attributes = config["attributes"];
+
+        var booleanEnum = ["true", "false"];
+        for (var name in attributes) {
+            var attributeConfig = attributes[name];
+            if (attributeConfig.type === "boolean")
+                attributeConfig.enum = booleanEnum;
+            this._attributes.set(name, new WebInspector.ARIAMetadata.Attribute(attributeConfig));
+        }
+
+        var roles = config["roles"];

[lushnikov, 2016/08/26 23:32:20]

nit: inlining this would be nice 

+
+        /** @type {!Array<string>} */
+        this._roleNames = Object.keys(roles);
+    },
+
+    /**
+     * @param {string} property
+     * @return {!Array<string>}
+     */
+    valuesForProperty: function(property)

[lushnikov, 2016/08/26 23:32:20]

Feels a little weird that we call it values here and enum in the attribute
itself. But works for me!

[aboxhall, 2016/08/26 23:43:58]

I can see that. It's kind of an implementation detail.

+    {
+        if (this._attributes.has(property))
+            return this._attributes.get(property).enum();
+
+        if (property === "role")
+            return this._roleNames;
+
+        return [];
+    }
+};
+
+/**
+ * @constructor
+ * @param {!Object} config
+ */
+WebInspector.ARIAMetadata.Attribute = function(config)
+{
+    /** @type {!Array<string>} */
+    this._enum = [];
+
+    if ("enum" in config)
+        this._enum = config.enum;
+};
+
+WebInspector.ARIAMetadata.Attribute.prototype = {
+    /**
+     * @return {!Array<string>}
+     */
+    enum: function()
+    {
+        return this._enum;
+    }
+};