78 lines
2.9 KiB
JavaScript
78 lines
2.9 KiB
JavaScript
/*****************************************************************************
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* Open MCT, Copyright (c) 2009-2016, 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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* Implements the "Start" action for timers.
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*
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* Sets the reference timestamp in a timer to the current
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* time, such that it begins counting up.
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*
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* @implements {Action}
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* @memberof platform/features/clock
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* @constructor
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* @param {Function} now a function which returns the current
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* time (typically wrapping `Date.now`)
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* @param {ActionContext} context the context for this action
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*/
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function StartTimerAction(now, context) {
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this.domainObject = context.domainObject;
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this.now = now;
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}
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StartTimerAction.appliesTo = function (context) {
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var model =
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(context.domainObject && context.domainObject.getModel()) ||
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{};
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// We show this variant for timers which do not yet have
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// a target time.
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return model.type === 'timer' &&
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model.timerState !== 'started';
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};
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StartTimerAction.prototype.perform = function () {
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var domainObject = this.domainObject,
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now = this.now;
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function updateModel(model) {
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//if we are resuming
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if (model.pausedTime) {
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var timeShift = now() - model.pausedTime;
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model.timestamp = model.timestamp + timeShift;
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} else {
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model.timestamp = now();
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}
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model.timerState = 'started';
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model.pausedTime = undefined;
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}
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return domainObject.useCapability('mutation', updateModel);
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};
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return StartTimerAction;
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}
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);
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