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63 lines
1.6 KiB
JavaScript
63 lines
1.6 KiB
JavaScript
/*
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* Copyright [2015] [wisemapping]
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*
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* Licensed under WiseMapping Public License, Version 1.0 (the "License").
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* It is basically the Apache License, Version 2.0 (the "License") plus the
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* "powered by wisemapping" text requirement on every single page;
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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.wisemapping.org/license
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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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import { $defined } from '@wisemapping/core-js';
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class Command {
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/**
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* @classdesc The command base class for handling do/undo mindmap operations
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* @constructs
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*/
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constructor() {
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this._id = Command._nextUUID();
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}
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/**
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* @abstract
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*/
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execute(commandContext) {
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throw new Error('execute must be implemented.');
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}
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/**
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* Triggered by the undo button - reverses the executed command
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* @abstract
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*/
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undoExecute(commandContext) {
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throw new Error('undo must be implemented.');
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}
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/**
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* Returns the unique id of this command
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* @returns {Number} command id
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*/
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getId() {
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return this._id;
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}
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}
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Command._nextUUID = function _nextUUID() {
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if (!$defined(Command._uuid)) {
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Command._uuid = 1;
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}
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Command._uuid += 1;
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return Command._uuid;
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};
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export default Command;
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