Continue progress on feed inspector.

Evergreen/Inspector/FeedInspectorViewController.swift

@@ -8,18 +8,27 @@
 
 import AppKit
 import Data
+import DB5
 
 final class FeedInspectorViewController: NSViewController, Inspector {
 
-	@IBOutlet var imageView: NSImageView!
-	@IBOutlet var nameTextField: NSTextField!
-	@IBOutlet var homePageURLTextField: NSTextField!
-	@IBOutlet var urlTextField: NSTextField!
+	@IBOutlet var imageView: NSImageView?
+	@IBOutlet var nameTextField: NSTextField?
+	@IBOutlet var homePageURLTextField: NSTextField?
+	@IBOutlet var urlTextField: NSTextField?
+
+	private var feed: Feed? {
+		didSet {
+			updateUI()
+		}
+	}
+
+	// MARK: Inspector
 
 	let isFallbackInspector = false
 	var objects: [Any]? {
 		didSet {
-			updateUI()
+			updateFeed()
 		}
 	}
 
@@ -28,69 +37,74 @@ final class FeedInspectorViewController: NSViewController, Inspector {
 		return objects.count == 1 && objects.first is Feed
 	}
 
-	func willEndInspectingObjects() {
-		
-		makeUIEmpty()
+	// MARK: NSViewController
+
+	override func viewDidLoad() {
+
+		imageView!.wantsLayer = true
+		let cornerRadius = appDelegate.currentTheme.float(forKey: "MainWindow.Timeline.cell.avatarCornerRadius")
+		imageView!.layer?.cornerRadius = cornerRadius
+
+		updateUI()
+
+		NotificationCenter.default.addObserver(self, selector: #selector(imageDidBecomeAvailable(_:)), name: .ImageDidBecomeAvailable, object: nil)
+	}
+
+	// MARK: Notifications
+
+	@objc func imageDidBecomeAvailable(_ note: Notification) {
+
+		updateImage()
 	}
 }
 
 private extension FeedInspectorViewController {
 
-	private var feed: Feed? {
-		guard let objects = objects, objects.count == 1, let feed = objects.first as? Feed else {
-			return nil
+	func updateFeed() {
+
+		guard let objects = objects, objects.count == 1, let singleFeed = objects.first as? Feed else {
+			feed = nil
+			return
 		}
-		return feed
+		feed = singleFeed
 	}
 
 	func updateUI() {
 
-		view.needsLayout = true
+		updateImage()
+		updateName()
+		updateHomePageURL()
+		updateFeedURL()
 
-		guard let feed = feed else {
-			makeUIEmpty()
+		view.needsLayout = true
+	}
+
+	func updateImage() {
+
+		guard let feed = feed, let image = image(for: feed) else {
+			imageView?.image = nil
 			return
 		}
-
-		updateImage(feed)
-		updateName(feed)
-		updateHomePageURL(feed)
-		updateFeedURL(feed)
+		imageView?.image = image
 	}
 
-	func updateImage(_ feed: Feed) {
+	func image(for feed: Feed) -> NSImage? {
 
-		if let image = appDelegate.feedIconDownloader.icon(for: feed) {
-			imageView.image = image
-		}
-		else if let image = appDelegate.faviconDownloader.favicon(for: feed) {
-			imageView.image = image
-		}
-		else {
-			imageView.image = nil
-		}
+		return appDelegate.feedIconDownloader.icon(for: feed) ?? appDelegate.faviconDownloader.favicon(for: feed)
 	}
 
-	func updateName(_ feed: Feed) {
+	func updateName() {
 
-		nameTextField.stringValue = feed.editedName ?? feed.name ?? ""
+		nameTextField?.stringValue = feed?.editedName ?? feed?.name ?? ""
 	}
 
-	func updateHomePageURL(_ feed: Feed) {
+	func updateHomePageURL() {
 
-		homePageURLTextField.stringValue = feed.homePageURL ?? ""
+		homePageURLTextField?.stringValue = feed?.homePageURL ?? ""
 	}
 
-	func updateFeedURL(_ feed: Feed) {
+	func updateFeedURL() {
 
-		urlTextField.stringValue = feed.url
-	}
-
-	func makeUIEmpty() {
-
-		imageView.image = nil
-		nameTextField.stringValue = ""
-		homePageURLTextField.stringValue = ""
-		urlTextField.stringValue = ""
+		urlTextField?.stringValue = feed?.url ?? ""
 	}
 }

Evergreen/Inspector/InspectorWindowController.swift

@@ -14,8 +14,6 @@ protocol Inspector: class {
 	var isFallbackInspector: Bool { get } // Can handle nothing-to-inspect or unexpected type of objects.
 
 	func canInspect(_ objects: [Any]) -> Bool
-
-	func willEndInspectingObjects() // Called on the current inspector right before objects is about to change.
 }
 
 typealias InspectorViewController = Inspector & NSViewController
@@ -44,9 +42,6 @@ final class InspectorWindowController: NSWindowController {
 
 	private var currentInspector: InspectorViewController! {
 		didSet {
-			if let oldInspector = oldValue {
-				oldInspector.willEndInspectingObjects()
-			}
 			currentInspector.objects = objects
 			for inspector in inspectors {
 				if inspector !== currentInspector {