/** * Copyright (c) Meta Platforms, Inc. and affiliates. * * This source code is licensed under the MIT license found in the * LICENSE file in the root directory of this source tree. * * @flow strict * @format */ 'use strict'; /*:: import type {PackagerAsset} from './registry.js'; */ const androidScaleSuffix = { '0.75': 'ldpi', '1': 'mdpi', '1.5': 'hdpi', '2': 'xhdpi', '3': 'xxhdpi', '4': 'xxxhdpi', }; const ANDROID_BASE_DENSITY = 160; /** * FIXME: using number to represent discrete scale numbers is fragile in essence because of * floating point numbers imprecision. */ function getAndroidAssetSuffix(scale /*: number */) /*: string */ { if (scale.toString() in androidScaleSuffix) { // $FlowFixMe[invalid-computed-prop] return androidScaleSuffix[scale.toString()]; } // NOTE: Android Gradle Plugin does not fully support the nnndpi format. // See https://issuetracker.google.com/issues/72884435 if (Number.isFinite(scale) && scale > 0) { return Math.round(scale * ANDROID_BASE_DENSITY) + 'dpi'; } throw new Error('no such scale ' + scale.toString()); } // See https://developer.android.com/guide/topics/resources/drawable-resource.html const drawableFileTypes = new Set([ 'gif', 'jpeg', 'jpg', 'ktx', 'png', 'svg', 'webp', 'xml', ]); function getAndroidResourceFolderName( asset /*: PackagerAsset */, scale /*: number */, ) /*: string */ { if (!drawableFileTypes.has(asset.type)) { return 'raw'; } const suffix = getAndroidAssetSuffix(scale); if (!suffix) { throw new Error( "Don't know which android drawable suffix to use for scale: " + scale + '\nAsset: ' + JSON.stringify(asset, null, '\t') + '\nPossible scales are:' + JSON.stringify(androidScaleSuffix, null, '\t'), ); } return 'drawable-' + suffix; } function getAndroidResourceIdentifier( asset /*: PackagerAsset */, ) /*: string */ { return (getBasePath(asset) + '/' + asset.name) .toLowerCase() .replace(/\//g, '_') // Encode folder structure in file name .replace(/([^a-z0-9_])/g, '') // Remove illegal chars .replace(/^(?:assets|assetsunstable_path)_/, ''); // Remove "assets_" or "assetsunstable_path_" prefix } function getBasePath(asset /*: PackagerAsset */) /*: string */ { const basePath = asset.httpServerLocation; return basePath.startsWith('/') ? basePath.slice(1) : basePath; } module.exports = { getAndroidResourceFolderName, getAndroidResourceIdentifier, getBasePath, };