33 lines
1.1 KiB
Swift
33 lines
1.1 KiB
Swift
import ExpoModulesCore
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public final class FontLoaderModule: Module {
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public func definition() -> ModuleDefinition {
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Name("ExpoFontLoader")
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Property("customNativeFonts") {
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return queryCustomNativeFonts()
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}
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AsyncFunction("loadAsync") { (fontFamilyAlias: String, localUri: URL) in
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let fontUrl = localUri as CFURL
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// If the font was already registered, unregister it first. Otherwise CTFontManagerRegisterFontsForURL
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// would fail because of a duplicated font name when the app reloads or someone wants to override a font.
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if FontFamilyAliasManager.familyName(forAlias: fontFamilyAlias) != nil {
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guard try unregisterFont(url: fontUrl) else {
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return
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}
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}
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// Register the font
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try registerFont(fontUrl)
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// Create a font object from the given URL
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let font = try loadFont(fromUrl: fontUrl, alias: fontFamilyAlias)
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if let postScriptName = font.postScriptName as? String {
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FontFamilyAliasManager.setAlias(fontFamilyAlias, forFont: postScriptName)
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}
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}
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}
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}
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