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57 lines
2.0 KiB
Swift
57 lines
2.0 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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@_exported import Foundation // Clang module
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@available(OSX 10.13, iOS 11.0, watchOS 4.0, tvOS 11.0, *)
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extension NSItemProvider {
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@available(OSX 10.13, iOS 11.0, watchOS 4.0, tvOS 11.0, *)
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public func registerObject<
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T : _ObjectiveCBridgeable
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> (
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ofClass: T.Type,
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visibility: NSItemProviderRepresentationVisibility,
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loadHandler: @escaping ((T?, Error?) -> Void) -> Progress?
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) where T._ObjectiveCType : NSItemProviderWriting {
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self.registerObject(
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ofClass: T._ObjectiveCType.self, visibility: visibility) {
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completionHandler in loadHandler {
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// Using `x as! T._ObjectiveCType?` triggers an assertion in the
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// compiler, hence the explicit call to `_bridgeToObjectiveC`.
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(x, error) in completionHandler(x?._bridgeToObjectiveC(), error)
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}
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}
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}
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@available(OSX 10.13, iOS 11.0, watchOS 4.0, tvOS 11.0, *)
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public func canLoadObject<
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T : _ObjectiveCBridgeable
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>(ofClass: T.Type) -> Bool
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where T._ObjectiveCType : NSItemProviderReading {
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return self.canLoadObject(ofClass: T._ObjectiveCType.self)
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}
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@available(OSX 10.13, iOS 11.0, watchOS 4.0, tvOS 11.0, *)
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public func loadObject<
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T : _ObjectiveCBridgeable
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>(
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ofClass: T.Type,
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completionHandler: @escaping (T?, Error?) -> Void
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) -> Progress where T._ObjectiveCType : NSItemProviderReading {
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return self.loadObject(ofClass: T._ObjectiveCType.self) {
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x, error in completionHandler(x as! T?, error)
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}
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}
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}
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