59 lines
2.5 KiB
JavaScript
59 lines
2.5 KiB
JavaScript
/*****************************************************************************
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* Open MCT, Copyright (c) 2014-2018, 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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define(
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[],
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function () {
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/**
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* Utility function for creating getter-setter functions,
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* since these are frequently useful for element proxies.
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*
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* An optional third argument may be supplied in order to
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* constrain or modify arguments when using as a setter;
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* this argument is a function which takes two arguments
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* (the current value for the property, and the requested
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* new value.) This is useful when values need to be kept
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* in certain ranges; specifically, to keep x/y positions
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* non-negative in a fixed position view.
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*
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* @memberof platform/features/layout
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* @constructor
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* @param {Object} object the object to get/set values upon
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* @param {string} key the property to get/set
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* @param {function} [updater] function used to process updates
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*/
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function AccessorMutator(object, key, updater) {
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return function (value) {
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if (arguments.length > 0) {
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object[key] = updater ?
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updater(value, object[key]) :
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value;
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}
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return object[key];
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};
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}
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return AccessorMutator;
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}
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);
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