74 lines
2.4 KiB
JavaScript
74 lines
2.4 KiB
JavaScript
// vim: set et sw=2 ts=2:
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//
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// This file is part of Moonfire NVR, a security camera digital video recorder.
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// Copyright (C) 2018 Dolf Starreveld <dolf@starreveld.com>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// In addition, as a special exception, the copyright holders give
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// permission to link the code of portions of this program with the
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// OpenSSL library under certain conditions as described in each
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// individual source file, and distribute linked combinations including
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// the two.
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//
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// You must obey the GNU General Public License in all respects for all
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// of the code used other than OpenSSL. If you modify file(s) with this
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// exception, you may extend this exception to your version of the
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// file(s), but you are not obligated to do so. If you do not wish to do
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// so, delete this exception statement from your version. If you delete
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// this exception statement from all source files in the program, then
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// also delete it here.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Class to represent ranges of values.
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*
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* The range has a "low", and "high" value property and is inclusive.
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* The "size" property returns the difference between high and low.
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*/
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export default class Range {
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/**
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* Create a range.
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*
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* @param {Number} low Low value (inclusive) in range.
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* @param {Number} high High value (inclusive) in range.
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*/
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constructor(low, high) {
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if (high < low) {
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console.warn('Warning range swap: ' + low + ' - ' + high);
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[low, high] = [high, low];
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}
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this.low = low;
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this.high = high;
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}
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/**
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* Size of the range.
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*
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* @return {Number} high - low
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*/
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get size() {
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return this.high - this.low;
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}
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/**
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* Determine if value is inside the range.
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*
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* @param {Number} value Value to test
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* @return {Boolean}
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*/
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isInRange(value) {
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return value >= this.low && value <= this.high;
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}
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}
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