helper.format.unit.js
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/*
* ADOBE CONFIDENTIAL
*
* Copyright 2016 Adobe Systems Incorporated
* All Rights Reserved.
*
* NOTICE: All information contained herein is, and remains
* the property of Adobe Systems Incorporated and its suppliers,
* if any. The intellectual and technical concepts contained
* herein are proprietary to Adobe Systems Incorporated and its
* suppliers and may be covered by U.S. and Foreign Patents,
* patents in process, and are protected by trade secret or copyright law.
* Dissemination of this information or reproduction of this material
* is strictly forbidden unless prior written permission is obtained
* from Adobe Systems Incorporated.
*/
/* globals use */
use(function() {
'use strict';
/**
* String array of units for digital information in metric form (multiples of 1000 bytes)
*/
var UNITS_DI_METRIC = [1000, 'bytes', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
/**
* String array of units for digital information in IEC form (multiples of 1024 bytes)
*/
var UNITS_DI_IEC = [1024, 'bytes', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB', 'ZiB', 'YiB'];
/**
* Formats the given value to best unit available.
*
* @param {Number} value The value to format
* @param {Array} units Array of units. The first unit specifies the base.
* @param {Number} decimals The number of decimals to show, if required.
* @return {String} the formatted string.
*/
function formatUnit(value, units, decimals) {
if (typeof value === 'undefined') {
return 'NaN';
}
if (typeof units === 'undefined') {
units = UNITS_DI_IEC;
}
var sign = '';
var base = units[0];
var i = 1;
if (value < 0) {
value = -value;
sign = '-';
}
while (value >= base && i < units.length - 1) {
value /= base;
i++;
}
return sign + value.toFixed(decimals) + ' ' + units[i];
}
/*eslint-disable */
var units = this.units || UNITS_DI_IEC;
var value = this.value;
var decimals = this.decimals || 2;
/*eslint-enable */
return {
UNITS_DI_METRIC: UNITS_DI_METRIC,
UNITS_DI_IEC: UNITS_DI_IEC,
formattedUnit: function() {
return formatUnit(value, units, decimals);
},
formatUnit: formatUnit
};
});