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// 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.
/**
* @unrestricted
*/
Accessibility.ARIAMetadata = class {
/**
* @param {?Object} config
*/
constructor(config) {
/** @type {!Map<string, !Accessibility.ARIAMetadata.Attribute>} */
this._attributes = new Map();
if (config)
this._initialize(config);
}
/**
* @param {!Object} config
*/
_initialize(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 Accessibility.ARIAMetadata.Attribute(attributeConfig));
}
/** @type {!Array<string>} */
this._roleNames = Object.keys(config['roles']);
}
/**
* @param {string} property
* @return {!Array<string>}
*/
valuesForProperty(property) {
if (this._attributes.has(property))
return this._attributes.get(property).getEnum();
if (property === 'role')
return this._roleNames;
return [];
}
};
/**
* @return {!Accessibility.ARIAMetadata}
*/
Accessibility.ariaMetadata = function() {
if (!Accessibility.ARIAMetadata._instance)
Accessibility.ARIAMetadata._instance = new Accessibility.ARIAMetadata(Accessibility.ARIAMetadata._config || null);
return Accessibility.ARIAMetadata._instance;
};
/**
* @unrestricted
*/
Accessibility.ARIAMetadata.Attribute = class {
/**
* @param {!Object} config
*/
constructor(config) {
/** @type {!Array<string>} */
this._enum = [];
if ('enum' in config)
this._enum = config.enum;
}
/**
* @return {!Array<string>}
*/
getEnum() {
return this._enum;
}
};
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