2021-03-24 14:21:21 +00:00
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import { LitElement } from 'lit';
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2021-05-27 21:00:43 +00:00
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import { customElement, property } from 'lit/decorators.js';
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2022-03-24 11:48:03 +00:00
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import { LocalizeController } from '~/utilities/localize';
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2021-02-26 14:09:13 +00:00
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/**
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2022-01-27 13:56:51 +00:00
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2021-02-26 14:09:13 +00:00
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* @since 2.0
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* @status stable
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*/
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2021-03-18 13:04:23 +00:00
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@customElement('sl-format-bytes')
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2021-03-09 00:14:32 +00:00
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export default class SlFormatBytes extends LitElement {
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2022-01-16 05:47:14 +00:00
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private readonly localize = new LocalizeController(this);
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2021-12-07 18:20:27 +00:00
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2021-02-26 14:09:13 +00:00
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/** The number to format in bytes. */
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2021-07-01 00:04:46 +00:00
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@property({ type: Number }) value = 0;
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2021-02-26 14:09:13 +00:00
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/** The unit to display. */
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2022-01-27 13:56:51 +00:00
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@property() unit: 'byte' | 'bit' = 'byte';
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/** Determines how to display the result, e.g. "100 bytes", "100 b", or "100b". */
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@property() display: 'long' | 'short' | 'narrow' = 'short';
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2021-02-26 14:09:13 +00:00
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/** The locale to use when formatting the number. */
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2021-12-02 15:29:04 +00:00
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@property() lang: string;
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2021-02-26 14:09:13 +00:00
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render() {
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2022-01-27 13:56:51 +00:00
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if (isNaN(this.value)) {
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return '';
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}
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const bitPrefixes = ['', 'kilo', 'mega', 'giga', 'tera']; // petabit isn't a supported unit
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const bytePrefixes = ['', 'kilo', 'mega', 'giga', 'tera', 'peta'];
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const prefix = this.unit === 'bit' ? bitPrefixes : bytePrefixes;
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const index = Math.max(0, Math.min(Math.floor(Math.log10(this.value) / 3), prefix.length - 1));
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const unit = prefix[index] + this.unit;
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const valueToFormat = parseFloat((this.value / Math.pow(1000, index)).toPrecision(3));
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return this.localize.number(valueToFormat, {
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style: 'unit',
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unit,
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unitDisplay: this.display
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2021-02-26 14:09:13 +00:00
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});
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}
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}
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2021-03-12 14:07:38 +00:00
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2021-03-12 14:09:08 +00:00
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declare global {
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interface HTMLElementTagNameMap {
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'sl-format-bytes': SlFormatBytes;
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}
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}
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