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/*****************************************************************************
* Open MCT, Copyright (c) 2014-2021, United States Government
* as represented by the Administrator of the National Aeronautics and Space
* Administration. All rights reserved.
*
* Open MCT is licensed under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0.
*
* 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.
*
* Open MCT includes source code licensed under additional open source
* licenses. See the Open Source Licenses file (LICENSES.md) included with
* this source code distribution or the Licensing information page available
* at runtime from the About dialog for additional information.
*****************************************************************************/
/**
* Module defining MCTInclude. Created by vwoeltje on 11/7/14.
*/
define(
[],
function () {
/**
* Defines the mct-include directive. This acts like the
* ng-include directive, except it accepts a symbolic
* key which can be exposed by bundles, instead of requiring
* an explicit path.
*
* This directive uses two-way binding for three attributes:
*
* * `key`, matched against the key of a defined template extension
* in order to determine which actual template to include.
* * `ng-model`, populated as `ngModel` in the loaded template's
* scope; used for normal ng-model purposes (e.g. if the
* included template is meant to two-way bind to a data model.)
* * `parameters`, used to communicate display parameters to
* the included template (e.g. title.) The difference between
* `parameters` and `ngModel` is intent: Both are two-way
* bound, but `ngModel` is useful for data models (more like
* an output) and `parameters` is meant to be useful for
* display parameterization (more like an input.)
*
* @memberof platform/representation
* @constructor
* @param {TemplateDefinition[]} templates an array of
* template extensions
*/
function MCTInclude(templates, templateLinker) {
var templateMap = {};
function link(scope, element) {
var changeTemplate = templateLinker.link(
scope,
element,
scope.key && templateMap[scope.key]
);
scope.$watch('key', function (newKey, oldKey) {
if (newKey !== oldKey) {
changeTemplate(newKey && templateMap[newKey]);
}
});
}
// Prepopulate templateMap for easy look up by key
templates.forEach(function (template) {
var key = template.key;
// First found should win (priority ordering)
templateMap[key] =
templateMap[key] || template;
});
return {
// Only show at the element level
restrict: "E",
// Use the included controller to populate scope
link: link,
// May hide the element, so let other directives act first
priority: -1000,
// Two-way bind key, ngModel, and parameters
scope: {
key: "=",
ngModel: "=",
parameters: "="
}
};
}
return MCTInclude;
}
);
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