wisemapping-frontend/packages/mindplot/lib/components/Command.js
2021-09-29 17:24:07 -03:00

68 lines
1.7 KiB
JavaScript

/*
* Copyright [2015] [wisemapping]
*
* Licensed under WiseMapping Public License, Version 1.0 (the "License").
* It is basically the Apache License, Version 2.0 (the "License") plus the
* "powered by wisemapping" text requirement on every single page;
* you may not use this file except in compliance with the License.
* You may obtain a copy of the license at
*
* http://www.wisemapping.org/license
*
* 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.
*/
const Command = new Class(/** @lends mindplot.Command */{
/**
* @classdesc The command base class for handling do/undo mindmap operations
* @constructs
*/
initialize: function()
{
this._id = Command._nextUUID();
},
/**
* @abstract
*/
execute: function(commandContext)
{
throw "execute must be implemented.";
},
/**
* Triggered by the undo button - reverses the executed command
* @abstract
*/
undoExecute: function(commandContext)
{
throw "undo must be implemented.";
},
/**
* Returns the unique id of this command
* @returns {Number} command id
*/
getId:function()
{
return this._id;
}
});
Command._nextUUID = function()
{
if (!$defined(Command._uuid))
{
Command._uuid = 1;
}
Command._uuid = Command._uuid + 1;
return Command._uuid;
};
export default Command;