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82 lines
3.4 KiB
JavaScript
82 lines
3.4 KiB
JavaScript
/*****************************************************************************
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* Open MCT Web, Copyright (c) 2014-2015, 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 Web 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 Web 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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/*global define*/
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define(
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[],
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function () {
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"use strict";
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/**
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* Policy controlling when the `edit` and/or `properties` actions
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* can appear as applicable actions of the `view-control` category
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* (shown as buttons in the top-right of browse mode.)
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* @constructor
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*/
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function EditActionPolicy() {
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// Get a count of views which are not flagged as non-editable.
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function countEditableViews(context) {
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var domainObject = (context || {}).domainObject,
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views = domainObject && domainObject.useCapability('view'),
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count = 0;
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// A view is editable unless explicitly flagged as not
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(views || []).forEach(function (view) {
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count += (view.editable !== false) ? 1 : 0;
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});
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return count;
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}
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return {
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/**
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* Check whether or not a given action is allowed by this
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* policy.
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* @param {Action} action the action
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* @param context the context
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* @returns {boolean} true if not disallowed
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*/
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allow: function (action, context) {
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var key = action.getMetadata().key,
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category = (context || {}).category;
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// Only worry about actions in the view-control category
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if (category === 'view-control') {
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// Restrict 'edit' to cases where there are editable
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// views (similarly, restrict 'properties' to when
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// the converse is true)
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if (key === 'edit') {
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return countEditableViews(context) > 0;
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} else if (key === 'properties') {
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return countEditableViews(context) < 1;
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}
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}
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// Like all policies, allow by default.
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return true;
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}
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};
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}
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return EditActionPolicy;
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}
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); |