material-motion
Version:
Makes it easy to add rich, interactive motion to your application.
40 lines • 1.52 kB
JavaScript
/** @license
* Copyright 2016 - present The Material Motion Authors. All Rights Reserved.
*
* 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.
*/
import { isDefined, isPoint2D, } from '../typeGuards';
export function withDistanceFrom(superclass) {
return class extends superclass {
distanceFrom({ origin$ }) {
if (!isDefined(origin$)) {
origin$ = arguments[0];
}
return this._reactiveMap({
transform({ upstream, origin }) {
if (isPoint2D(upstream)) {
return Math.sqrt(Math.pow((origin.x - upstream.x), 2) +
Math.pow((origin.y - upstream.y), 2));
}
else {
return Math.abs(origin - upstream);
}
},
inputs: {
origin: origin$,
},
});
}
};
}
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