mirror of
https://github.com/nasa/openmct.git
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89 lines
2.7 KiB
JavaScript
89 lines
2.7 KiB
JavaScript
/*****************************************************************************
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* Open MCT, Copyright (c) 2014-2024, United States Government
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* as represented by the Administrator of the National Aeronautics and Space
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* Administration. All rights reserved.
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*
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* Open MCT is licensed under the Apache License, Version 2.0 (the
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* "License"); 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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* 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* Open MCT includes source code licensed under additional open source
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* licenses. See the Open Source Licenses file (LICENSES.md) included with
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* this source code distribution or the Licensing information page available
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* at runtime from the About dialog for additional information.
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*****************************************************************************/
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import EventEmitter from 'EventEmitter';
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export default class Editor extends EventEmitter {
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constructor(openmct) {
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super();
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this.editing = false;
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this.openmct = openmct;
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}
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/**
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* Initiate an editing session. This will start a transaction during
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* which any persist operations will be deferred until either save()
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* or finish() are called.
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*/
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edit() {
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if (this.editing === true) {
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throw 'Already editing';
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}
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this.editing = true;
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this.emit('isEditing', true);
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this.openmct.objects.startTransaction();
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}
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/**
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* @returns {boolean} true if the application is in edit mode, false otherwise.
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*/
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isEditing() {
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return this.editing;
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}
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/**
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* Save any unsaved changes from this editing session. This will
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* end the current transaction.
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*/
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async save() {
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const transaction = this.openmct.objects.getActiveTransaction();
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await transaction.commit();
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this.editing = false;
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this.emit('isEditing', false);
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this.openmct.objects.endTransaction();
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}
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/**
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* End the currently active transaction and discard unsaved changes.
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*/
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cancel() {
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this.editing = false;
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this.emit('isEditing', false);
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return new Promise((resolve, reject) => {
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const transaction = this.openmct.objects.getActiveTransaction();
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if (!transaction) {
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return resolve();
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}
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transaction
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.cancel()
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.then(resolve)
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.catch(reject)
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.finally(() => {
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this.openmct.objects.endTransaction();
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});
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});
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}
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}
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