49 строки
1.2 KiB
JavaScript
49 строки
1.2 KiB
JavaScript
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow
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* @format
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*/
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import PixelRatio from '../Utilities/PixelRatio';
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let cacheBreaker;
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let warnIfCacheBreakerUnset = true;
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export function pickScale(scales: Array<number>, deviceScale?: number): number {
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if (deviceScale == null) {
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deviceScale = PixelRatio.get();
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}
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// Packager guarantees that `scales` array is sorted
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for (let i = 0; i < scales.length; i++) {
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if (scales[i] >= deviceScale) {
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return scales[i];
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}
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}
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// If nothing matches, device scale is larger than any available
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// scales, so we return the biggest one. Unless the array is empty,
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// in which case we default to 1
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return scales[scales.length - 1] || 1;
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}
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export function setUrlCacheBreaker(appendage: string) {
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cacheBreaker = appendage;
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}
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export function getUrlCacheBreaker(): string {
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if (cacheBreaker == null) {
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if (__DEV__ && warnIfCacheBreakerUnset) {
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warnIfCacheBreakerUnset = false;
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console.warn(
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'AssetUtils.getUrlCacheBreaker: Cache breaker value is unset',
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);
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}
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return '';
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}
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return cacheBreaker;
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}
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