@google/model-viewer
Version:
Easily display interactive 3D models on the web and in AR!
55 lines • 2.07 kB
JavaScript
/* @license
* Copyright 2019 Google LLC. All Rights Reserved.
* 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.
*/
import { parseExpressions } from './parsers.js';
/**
* For our purposes, an enumeration is a fixed set of CSS-expression-compatible
* names. When serialized, a selected subset of the members may be specified as
* whitespace-separated strings. An enumeration deserializer is a function that
* parses a serialized subset of an enumeration and returns any members that are
* found as a Set.
*
* The following example will produce a deserializer for the days of the
* week:
*
* const deserializeDaysOfTheWeek = enumerationDeserializer([
* 'Monday',
* 'Tuesday',
* 'Wednesday',
* 'Thursday',
* 'Friday',
* 'Saturday',
* 'Sunday'
* ]);
*/
export const enumerationDeserializer = (allowedNames) => (valueString) => {
try {
const expressions = parseExpressions(valueString);
const names = (expressions.length ? expressions[0].terms : [])
.filter((valueNode) => valueNode && valueNode.type === 'ident')
.map(valueNode => valueNode.value)
.filter(name => allowedNames.indexOf(name) > -1);
// NOTE(cdata): IE11 does not support constructing a Set directly from
// an iterable, so we need to manually add all the items:
const result = new Set();
for (const name of names) {
result.add(name);
}
return result;
}
catch (_error) {
}
return new Set();
};
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