71 lines
1.9 KiB
JavaScript
71 lines
1.9 KiB
JavaScript
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/* Copyright 2018 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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const OptionKind = {
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VIEWER: 'viewer',
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API: 'api',
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WORKER: 'worker',
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};
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/**
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* PLEASE NOTE: To avoid introducing unnecessary dependencies, we specify the
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* values below *explicitly* rather than relying on imported types;
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* compare with the format of `default_preferences.json`.
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*/
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const defaultOptions = {
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};
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const userOptions = Object.create(null);
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class AppOptions {
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constructor() {
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throw new Error('Cannot initialize AppOptions.');
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}
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static get(name) {
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let defaultOption = defaultOptions[name], userOption = userOptions[name];
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if (userOption !== undefined) {
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return userOption;
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}
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return (defaultOption !== undefined ? defaultOption.value : undefined);
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}
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static getAll(kind = null) {
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let options = Object.create(null);
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for (let name in defaultOptions) {
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let defaultOption = defaultOptions[name], userOption = userOptions[name];
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if (kind && defaultOption.kind !== kind) {
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continue;
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}
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options[name] = (userOption !== undefined ?
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userOption : defaultOption.value);
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}
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return options;
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}
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static set(name, value) {
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userOptions[name] = value;
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}
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static remove(name) {
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delete userOptions[name];
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}
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}
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export {
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AppOptions,
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OptionKind,
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};
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