66 lines
1.9 KiB
TypeScript
66 lines
1.9 KiB
TypeScript
import { Asset } from 'expo-asset';
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import { CodedError } from 'expo-modules-core';
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import ExpoFontLoader from './ExpoFontLoader';
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import { FontResource, FontSource, FontDisplay } from './Font.types';
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function uriFromFontSource(asset: FontSource): string | number | null {
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if (typeof asset === 'string') {
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return asset || null;
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} else if (typeof asset === 'number') {
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return uriFromFontSource(Asset.fromModule(asset));
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} else if (typeof asset === 'object' && typeof asset.uri === 'number') {
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return uriFromFontSource(asset.uri);
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} else if (typeof asset === 'object') {
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return asset.uri || (asset as Asset).localUri || (asset as FontResource).default || null;
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}
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return null;
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}
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function displayFromFontSource(asset: FontSource): FontDisplay {
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if (typeof asset === 'object' && 'display' in asset) {
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return asset.display || FontDisplay.AUTO;
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}
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return FontDisplay.AUTO;
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}
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export function getAssetForSource(source: FontSource): Asset | FontResource {
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const uri = uriFromFontSource(source);
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const display = displayFromFontSource(source);
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if (!uri || typeof uri !== 'string') {
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throwInvalidSourceError(uri);
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}
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return {
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uri,
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display,
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};
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}
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function throwInvalidSourceError(source: any): never {
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let type: string = typeof source;
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if (type === 'object') type = JSON.stringify(source, null, 2);
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throw new CodedError(
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`ERR_FONT_SOURCE`,
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`Expected font asset of type \`string | FontResource | Asset\` instead got: ${type}`
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);
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}
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// NOTE(EvanBacon): No async keyword!
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export function loadSingleFontAsync(name: string, input: Asset | FontResource): Promise<void> {
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if (typeof input !== 'object' || typeof input.uri !== 'string' || (input as any).downloadAsync) {
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throwInvalidSourceError(input);
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}
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try {
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return ExpoFontLoader.loadAsync(name, input);
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} catch {
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// No-op.
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}
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return Promise.resolve();
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}
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