92 lines
2.3 KiB
JavaScript
92 lines
2.3 KiB
JavaScript
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/**
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* Copyright (c) Facebook, Inc. and its 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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* @format
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* @flow strict
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*/
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'use strict';
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import type {PackagerAsset} from './AssetRegistry';
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const androidScaleSuffix = {
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'0.75': 'ldpi',
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'1': 'mdpi',
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'1.5': 'hdpi',
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'2': 'xhdpi',
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'3': 'xxhdpi',
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'4': 'xxxhdpi',
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};
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/**
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* FIXME: using number to represent discrete scale numbers is fragile in essence because of
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* floating point numbers imprecision.
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*/
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function getAndroidAssetSuffix(scale: number): string {
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if (scale.toString() in androidScaleSuffix) {
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return androidScaleSuffix[scale.toString()];
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}
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throw new Error('no such scale ' + scale.toString());
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}
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// See https://developer.android.com/guide/topics/resources/drawable-resource.html
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const drawableFileTypes = new Set([
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'gif',
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'jpeg',
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'jpg',
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'png',
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'svg',
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'webp',
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'xml',
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]);
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function getAndroidResourceFolderName(
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asset: PackagerAsset,
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scale: number,
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): string | $TEMPORARY$string<'raw'> {
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if (!drawableFileTypes.has(asset.type)) {
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return 'raw';
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}
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var suffix = getAndroidAssetSuffix(scale);
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if (!suffix) {
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throw new Error(
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"Don't know which android drawable suffix to use for scale: " +
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scale +
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'\nAsset: ' +
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JSON.stringify(asset, null, '\t') +
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'\nPossible scales are:' +
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JSON.stringify(androidScaleSuffix, null, '\t'),
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);
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}
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const androidFolder = 'drawable-' + suffix;
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return androidFolder;
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}
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function getAndroidResourceIdentifier(asset: PackagerAsset): string {
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var folderPath = getBasePath(asset);
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return (folderPath + '/' + asset.name)
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.toLowerCase()
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.replace(/\//g, '_') // Encode folder structure in file name
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.replace(/([^a-z0-9_])/g, '') // Remove illegal chars
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.replace(/^assets_/, ''); // Remove "assets_" prefix
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}
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function getBasePath(asset: PackagerAsset): string {
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var basePath = asset.httpServerLocation;
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if (basePath[0] === '/') {
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basePath = basePath.substr(1);
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}
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return basePath;
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}
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module.exports = {
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getAndroidAssetSuffix: getAndroidAssetSuffix,
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getAndroidResourceFolderName: getAndroidResourceFolderName,
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getAndroidResourceIdentifier: getAndroidResourceIdentifier,
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getBasePath: getBasePath,
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};
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