Add basic ExtensionPoint support.

Mac/Preferences/ExtensionPoints/ExtensionPointPreferencesViewController.swift

@@ -0,0 +1,89 @@
+//
+//  ExtensionsPreferencesViewController.swift
+//  NetNewsWire
+//
+//  Created by Maurice Parker on 4/6/20.
+//  Copyright © 2020 Ranchero Software. All rights reserved.
+//
+
+import AppKit
+
+final class ExtensionPointPreferencesViewController: NSViewController {
+
+	@IBOutlet weak var tableView: NSTableView!
+	@IBOutlet weak var detailView: NSView!
+	@IBOutlet weak var deleteButton: NSButton!
+	
+	private var sortedAccounts = [String]()
+
+	override func viewDidLoad() {
+		super.viewDidLoad()
+
+		tableView.delegate = self
+		tableView.dataSource = self
+		
+		showController(ExtensionPointAddViewController())
+
+		// Fix tableView frame — for some reason IB wants it 1pt wider than the clip view. This leads to unwanted horizontal scrolling.
+		var rTable = tableView.frame
+		rTable.size.width = tableView.superview!.frame.size.width
+		tableView.frame = rTable
+	}
+	
+}
+
+// MARK: - NSTableViewDataSource
+
+extension ExtensionPointPreferencesViewController: NSTableViewDataSource {
+
+	func numberOfRows(in tableView: NSTableView) -> Int {
+		return sortedAccounts.count
+	}
+
+	func tableView(_ tableView: NSTableView, objectValueFor tableColumn: NSTableColumn?, row: Int) -> Any? {
+		return sortedAccounts[row]
+	}
+}
+
+// MARK: - NSTableViewDelegate
+
+extension ExtensionPointPreferencesViewController: NSTableViewDelegate {
+
+	private static let cellIdentifier = NSUserInterfaceItemIdentifier(rawValue: "AccountCell")
+
+	func tableView(_ tableView: NSTableView, viewFor tableColumn: NSTableColumn?, row: Int) -> NSView? {
+		if let cell = tableView.makeView(withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "Cell"), owner: nil) as? NSTableCellView {
+			let account = sortedAccounts[row]
+//			cell.textField?.stringValue = account.nameForDisplay
+//			cell.imageView?.image = account.smallIcon?.image
+			return cell
+		}
+		return nil
+	}
+
+	func tableViewSelectionDidChange(_ notification: Notification) {
+		
+		
+	}
+	
+}
+
+// MARK: - Private
+
+private extension ExtensionPointPreferencesViewController {
+	
+	func showController(_ controller: NSViewController) {
+		
+		if let controller = children.first {
+			children.removeAll()
+			controller.view.removeFromSuperview()
+		}
+		
+		addChild(controller)
+		controller.view.translatesAutoresizingMaskIntoConstraints = false
+		detailView.addSubview(controller.view)
+		detailView.addFullSizeConstraints(forSubview: controller.view)
+		
+	}
+	
+}