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