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adding setting to allow users to customize between binary vs SI/Metri…
…c units in UI. fixes #330
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,75 +1,27 @@ | ||
| /** | ||
| * @license | ||
| * Copyright (c) 2019 Jonathan Catmull. | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in all | ||
| * copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| * SOFTWARE. | ||
| */ | ||
| import { Pipe, PipeTransform } from '@angular/core'; | ||
| import {Pipe, PipeTransform} from '@angular/core'; | ||
|
|
||
| type unit = 'bytes' | 'KB' | 'MB' | 'GB' | 'TB' | 'PB'; | ||
| type unitPrecisionMap = { | ||
| [u in unit]: number; | ||
| }; | ||
|
|
||
| const defaultPrecisionMap: unitPrecisionMap = { | ||
| bytes: 0, | ||
| KB: 0, | ||
| MB: 1, | ||
| GB: 1, | ||
| TB: 2, | ||
| PB: 2 | ||
| }; | ||
|
|
||
| /* | ||
| * Convert bytes into largest possible unit. | ||
| * Takes an precision argument that can be a number or a map for each unit. | ||
| * Usage: | ||
| * bytes | fileSize:precision | ||
| * @example | ||
| * // returns 1 KB | ||
| * {{ 1500 | fileSize }} | ||
| * @example | ||
| * // returns 2.1 GB | ||
| * {{ 2100000000 | fileSize }} | ||
| * @example | ||
| * // returns 1.46 KB | ||
| * {{ 1500 | fileSize:2 }} | ||
| */ | ||
| @Pipe({ name: 'fileSize' }) | ||
| @Pipe({name: 'fileSize'}) | ||
| export class FileSizePipe implements PipeTransform { | ||
| private readonly units: unit[] = ['bytes', 'KB', 'MB', 'GB', 'TB', 'PB']; | ||
|
|
||
| transform(bytes: number = 0, precision: number | unitPrecisionMap = defaultPrecisionMap): string { | ||
| if (isNaN(parseFloat(String(bytes))) || !isFinite(bytes)) return '?'; | ||
|
|
||
| let unitIndex = 0; | ||
| transform(bytes: number = 0, si = false, dp = 1): string { | ||
| const thresh = si ? 1000 : 1024; | ||
|
|
||
| while (bytes >= 1024) { | ||
| bytes /= 1024; | ||
| unitIndex++; | ||
| if (Math.abs(bytes) < thresh) { | ||
| return bytes + ' B'; | ||
| } | ||
|
|
||
| const unit = this.units[unitIndex]; | ||
| const units = si | ||
| ? ['kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'] | ||
| : ['KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB', 'ZiB', 'YiB']; | ||
| let u = -1; | ||
| const r = 10 ** dp; | ||
|
|
||
| if (typeof precision === 'number') { | ||
| return `${bytes.toFixed(+precision)} ${unit}`; | ||
| } | ||
| return `${bytes.toFixed(precision[unit])} ${unit}`; | ||
| do { | ||
| bytes /= thresh; | ||
| ++u; | ||
| } while (Math.round(Math.abs(bytes) * r) / r >= thresh && u < units.length - 1); | ||
|
|
||
|
|
||
| return bytes.toFixed(dp) + ' ' + units[u]; | ||
| } | ||
| } |