Rename MainFeed and MainTimeline folders to Sidebar and Timeline.

iOS/MainWindow/Sidebar/RefreshProgressView.swift

@@ -0,0 +1,135 @@
+//
+//  RefeshProgressView.swift
+//  NetNewsWire-iOS
+//
+//  Created by Maurice Parker on 10/24/19.
+//  Copyright © 2019 Ranchero Software. All rights reserved.
+//
+
+import UIKit
+import Account
+
+final class RefreshProgressView: UIView {
+
+	@IBOutlet weak var progressView: UIProgressView!
+	@IBOutlet weak var label: UILabel!
+
+	override func awakeFromNib() {
+
+		NotificationCenter.default.addObserver(self, selector: #selector(progressDidChange(_:)), name: .combinedRefreshProgressDidChange, object: nil)
+		NotificationCenter.default.addObserver(self, selector: #selector(contentSizeCategoryDidChange(_:)), name: UIContentSizeCategory.didChangeNotification, object: nil)
+		update()
+		scheduleUpdateRefreshLabel()
+
+		isAccessibilityElement = true
+		accessibilityTraits = [.updatesFrequently, .notEnabled]
+	}
+
+	func update() {
+		if !AccountManager.shared.combinedRefreshProgress.isComplete {
+			progressChanged(animated: false)
+		} else {
+			updateRefreshLabel()
+		}
+	}
+
+	override func didMoveToSuperview() {
+		progressChanged(animated: false)
+	}
+
+	@objc func progressDidChange(_ note: Notification) {
+		progressChanged(animated: true)
+	}
+
+	@objc func contentSizeCategoryDidChange(_ note: Notification) {
+		// This hack is probably necessary because custom views in the toolbar don't get
+		// notifications that the content size changed.
+		label.font = UIFont.preferredFont(forTextStyle: .footnote)
+	}
+
+	deinit {
+		NotificationCenter.default.removeObserver(self)
+	}
+
+}
+
+// MARK: Private
+
+private extension RefreshProgressView {
+
+	func progressChanged(animated: Bool) {
+		// Layout may crash if not in the view hierarchy.
+		// https://github.com/Ranchero-Software/NetNewsWire/issues/1764
+		let isInViewHierarchy = self.superview != nil
+
+		let progress = AccountManager.shared.combinedRefreshProgress
+
+		if progress.isComplete {
+			if isInViewHierarchy {
+				progressView.setProgress(1, animated: animated)
+			}
+
+			func completeLabel() {
+				// Check that there are no pending downloads.
+				if AccountManager.shared.combinedRefreshProgress.isComplete {
+					self.updateRefreshLabel()
+					self.label.isHidden = false
+					self.progressView.isHidden = true
+					if self.superview != nil {
+						self.progressView.setProgress(0, animated: animated)
+					}
+				}
+			}
+
+			if animated {
+				DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
+					completeLabel()
+				}
+			} else {
+				completeLabel()
+			}
+		} else {
+			label.isHidden = true
+			progressView.isHidden = false
+			if isInViewHierarchy {
+				let percent = Float(progress.numberCompleted) / Float(progress.numberOfTasks)
+
+				// Don't let the progress bar go backwards unless we need to go back more than 25%
+				if percent > progressView.progress || progressView.progress - percent > 0.25 {
+					progressView.setProgress(percent, animated: animated)
+				}
+			}
+		}
+	}
+
+	func updateRefreshLabel() {
+		if let accountLastArticleFetchEndTime = AccountManager.shared.lastArticleFetchEndTime {
+
+			if Date() > accountLastArticleFetchEndTime.addingTimeInterval(60) {
+
+				let relativeDateTimeFormatter = RelativeDateTimeFormatter()
+				relativeDateTimeFormatter.dateTimeStyle = .named
+				let refreshed = relativeDateTimeFormatter.localizedString(for: accountLastArticleFetchEndTime, relativeTo: Date())
+				let localizedRefreshText = NSLocalizedString("Updated %@", comment: "Updated")
+				let refreshText = NSString.localizedStringWithFormat(localizedRefreshText as NSString, refreshed) as String
+				label.text = refreshText
+
+			} else {
+				label.text = NSLocalizedString("Updated Just Now", comment: "Updated Just Now")
+			}
+
+		} else {
+			label.text = ""
+		}
+
+		accessibilityLabel = label.text
+	}
+
+	func scheduleUpdateRefreshLabel() {
+		DispatchQueue.main.asyncAfter(deadline: .now() + 60) { [weak self] in
+			self?.updateRefreshLabel()
+			self?.scheduleUpdateRefreshLabel()
+		}
+	}
+
+}