Implement macOS share button

Multiplatform/macOS/Article/SharingServiceDelegate.swift

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+//
+//  SharingServiceDelegate.swift
+//  NetNewsWire
+//
+//  Created by Maurice Parker on 9/7/18.
+//  Copyright © 2018 Ranchero Software. All rights reserved.
+//
+
+import AppKit
+
+@objc final class SharingServiceDelegate: NSObject, NSSharingServiceDelegate {
+
+	weak var window: NSWindow?
+	
+	init(_ window: NSWindow?) {
+		self.window = window
+	}
+
+	func sharingService(_ sharingService: NSSharingService, willShareItems items: [Any]) {
+		sharingService.subject = items
+			.compactMap { item in
+				let writer = item as? ArticlePasteboardWriter
+				return writer?.article.title
+			}
+			.joined(separator: ", ")
+	}
+	
+	func sharingService(_ sharingService: NSSharingService, sourceWindowForShareItems items: [Any], sharingContentScope: UnsafeMutablePointer<NSSharingService.SharingContentScope>) -> NSWindow? {
+		return window
+	}
+	
+}

Multiplatform/macOS/Article/SharingServicePickerDelegate.swift

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+//
+//  SharingServicePickerDelegate.swift
+//  NetNewsWire
+//
+//  Created by Brent Simmons on 2/17/18.
+//  Copyright © 2018 Ranchero Software. All rights reserved.
+//
+
+import AppKit
+import RSCore
+
+@objc final class SharingServicePickerDelegate: NSObject, NSSharingServicePickerDelegate {
+	
+	private let sharingServiceDelegate: SharingServiceDelegate
+	private let completion: (() -> Void)?
+	
+	init(_ window: NSWindow?, completion: (() -> Void)?) {
+		self.sharingServiceDelegate = SharingServiceDelegate(window)
+		self.completion = completion
+	}
+	
+	func sharingServicePicker(_ sharingServicePicker: NSSharingServicePicker, sharingServicesForItems items: [Any], proposedSharingServices proposedServices: [NSSharingService]) -> [NSSharingService] {
+		return proposedServices + SharingServicePickerDelegate.customSharingServices(for: items)
+	}
+
+	func sharingServicePicker(_ sharingServicePicker: NSSharingServicePicker, delegateFor sharingService: NSSharingService) -> NSSharingServiceDelegate? {
+		return sharingServiceDelegate
+	}
+
+	func sharingServicePicker(_ sharingServicePicker: NSSharingServicePicker, didChoose service: NSSharingService?) {
+		completion?()
+	}
+	
+	static func customSharingServices(for items: [Any]) -> [NSSharingService] {
+		let customServices = ExtensionPointManager.shared.activeSendToCommands.compactMap { (sendToCommand) -> NSSharingService? in
+
+			guard let object = items.first else {
+				return nil
+			}
+			
+			guard sendToCommand.canSendObject(object, selectedText: nil) else {
+				return nil
+			}
+
+			let image = sendToCommand.image ?? NSImage()
+			return NSSharingService(title: sendToCommand.title, image: image, alternateImage: nil) {
+				sendToCommand.sendObject(object, selectedText: nil)
+			}
+		}
+		return customServices
+	}
+}
+
+

Multiplatform/macOS/Article/SharingServiceView.swift

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+//
+//  SharingServiceView.swift
+//  Multiplatform macOS
+//
+//  Created by Maurice Parker on 7/14/20.
+//  Copyright © 2020 Ranchero Software. All rights reserved.
+//
+
+import SwiftUI
+import AppKit
+import Articles
+
+class SharingServiceController: NSViewController {
+	
+	var sharingServicePickerDelegate: SharingServicePickerDelegate? = nil
+	var articles = [Article]()
+	var completion: (() -> Void)? = nil
+
+	override func loadView() {
+		view = NSView()
+	}
+	
+	override func viewDidAppear() {
+		guard let anchor = view.superview?.superview else { return }
+		
+		sharingServicePickerDelegate = SharingServicePickerDelegate(self.view.window, completion: completion)
+		
+		let sortedArticles = articles.sortedByDate(.orderedAscending)
+		let items = sortedArticles.map { ArticlePasteboardWriter(article: $0) }
+		
+		let sharingServicePicker = NSSharingServicePicker(items: items)
+		sharingServicePicker.delegate = sharingServicePickerDelegate
+		
+		sharingServicePicker.show(relativeTo: anchor.bounds, of: anchor, preferredEdge: .minY)
+	}
+	
+}
+
+struct SharingServiceView: NSViewControllerRepresentable {
+
+	var articles: [Article]
+	@Binding var showing: Bool
+	
+	func makeNSViewController(context: Context) -> SharingServiceController {
+		let controller = SharingServiceController()
+		controller.articles = articles
+		controller.completion = {
+			showing = false
+		}
+		return controller
+	}
+
+	func updateNSViewController(_ nsViewController: SharingServiceController, context: Context) {
+	}
+	
+}