77 lines
2.8 KiB
Swift
77 lines
2.8 KiB
Swift
//
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// Copyright (c) 2020 Touch Instinct
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the Software), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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import CoreGraphics
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import CoreText
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import Foundation
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public enum FontFormat: String {
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case woff2
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}
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public extension CTFont {
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enum FontRegistrationError: Error {
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case fontsNotFound
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case unableToCreateCGFontFromData
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case unableToRegisterFont(CFError)
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case unknown
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}
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static func registerFont(at url: URL) throws {
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let fontData = try Data(contentsOf: url)
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guard let dataProvider = CGDataProvider(data: fontData as CFData),
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let font = CGFont(dataProvider) else {
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throw FontRegistrationError.unableToCreateCGFontFromData
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}
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var errorRef: Unmanaged<CFError>?
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let registrationWasSuccessful = CTFontManagerRegisterGraphicsFont(font, &errorRef)
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if registrationWasSuccessful {
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return
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} else if let error = errorRef?.takeRetainedValue() {
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if CFErrorGetCode(error) != CTFontManagerError.alreadyRegistered.rawValue {
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throw FontRegistrationError.unableToRegisterFont(error)
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} else {
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return // it's okay, font is already registered
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}
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} else {
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throw FontRegistrationError.unknown
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}
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}
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static func registerAllFonts(in bundle: Bundle,
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withFileExtension fileExtension: String = FontFormat.woff2.rawValue) throws {
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guard let fontUrls = bundle.urls(forResourcesWithExtension: fileExtension,
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subdirectory: nil),
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!fontUrls.isEmpty else {
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throw FontRegistrationError.fontsNotFound
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}
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try fontUrls.forEach {
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try registerFont(at: $0)
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}
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}
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}
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