implement scrollback saving

implement a scrollback cap of 10MiB
add prettyscrollback() to return kib, mib etc
tried a different resuming thingy

ShhShell/SSH/SSHHandler.swift

@@ -15,6 +15,7 @@ class SSHHandler: @unchecked Sendable, ObservableObject {
 	private var channel: ssh_channel?
 	
 	var scrollback: [String] = []
+	var scrollbackSize = 0.0
 	
 	@Published var title: String = ""
 	@Published var state: SSHState = .idle
@@ -133,6 +134,9 @@ class SSHHandler: @unchecked Sendable, ObservableObject {
 			withAnimation { self.testSuceeded = nil }
 		}
 		
+		scrollback = []
+		scrollbackSize = 0
+		
 		//send eof if open
 		if ssh_channel_is_open(channel) == 1 {
 			ssh_channel_send_eof(channel)
@@ -396,7 +400,12 @@ class SSHHandler: @unchecked Sendable, ObservableObject {
 //			print(String(data: Data(bytes: buffer, count: Int(nbytes)), encoding: .utf8)!)
 			#endif
 			Task { @MainActor in
-				scrollback.append(string)
+				scrollback.append(string)				
+				if scrollbackSize/1024/1024 > 10 {
+					scrollback.remove(at: 0)
+				} else {
+					scrollbackSize += Double(string.lengthOfBytes(using: .utf8))
+				}
 			}
 			return string
 		}
@@ -429,6 +438,16 @@ class SSHHandler: @unchecked Sendable, ObservableObject {
 //		print("resized tty to \(toRows)rows and \(toCols)cols")
 	}
 	
+	func prettyScrollbackSize() -> String {
+		if (scrollbackSize/1024/1024) > 1 {
+			return "\(scrollbackSize/1024/1024) MiB scrollback"
+		} else if scrollbackSize/1024 > 1 {
+			return "\(scrollbackSize/1024) KiB scrollback"
+		} else {
+			return "\(scrollbackSize) B scrollback"
+		}
+	}
+	
 	private func logSshGetError() {
 		guard var session = self.session else { return }
 		logger.critical("\(String(cString: ssh_get_error(&session)))")

ShhShell/Views/Hosts/ConnectionView.swift

@@ -12,8 +12,6 @@ struct ConnectionView: View {
 	@ObservedObject var hostsManager: HostsManager
 	@ObservedObject var keyManager: KeyManager
 	
-	@State var resuming: Bool = false
-	
 	@State var passphrase: String = ""
 	
 	@State var pubkeyStr: String = ""
@@ -112,7 +110,6 @@ struct ConnectionView: View {
 				
 				Button() {
 					showTerminal.toggle()
-					resuming = true
 				} label: {
 					Label("Show Terminal", systemImage: "apple.terminal")
 				}
@@ -159,7 +156,7 @@ struct ConnectionView: View {
 			}
 		}
 		.fullScreenCover(isPresented: $showTerminal) {
-			ShellView(handler: handler, resuming: resuming)
+			ShellView(handler: handler)
 		}
 		.onChange(of: handler.host.key) { _ in
 			guard let previousKnownHost = hostsManager.getHostMatching(handler.host) else { return }
@@ -169,7 +166,7 @@ struct ConnectionView: View {
 			}
 		}
 		.onDisappear {
-//			hostsManager.updateHost(handler.host)
+			hostsManager.updateHost(handler.host)
 		}
 		.task {
 			if let publicKeyData = handler.host.publicKey {

ShhShell/Views/Hosts/HostsView.swift

@@ -29,7 +29,7 @@ struct HostsView: View {
 				NavigationLink() {
 					ForEach(hostsManager.savedHosts) { host in
 						let miniHandler = SSHHandler(host: host)
-						TerminalController(handler: miniHandler, resuming: false)
+						TerminalController(handler: miniHandler)
 							.onAppear { miniHandler.go() }
 					}
 				} label: {

ShhShell/Views/Terminal/SSHTerminalView.swift

@@ -12,29 +12,15 @@ import SwiftTerm
 @MainActor
 final class SSHTerminalView: TerminalView, Sendable, @preconcurrency TerminalViewDelegate {
 	var handler: SSHHandler?
-	var sshQueue = DispatchQueue(label: "sshQueue")
+//	var sshQueue = DispatchQueue(label: "sshQueue")
-	var resuming: Bool
 	
-	public convenience init(frame: CGRect, handler: SSHHandler, resuming: Bool) {
+	public convenience init(frame: CGRect, handler: SSHHandler) {
 		self.init(frame: frame)
 		self.handler = handler
-		self.resuming = resuming
 		
-		sshQueue.async {
+		restoreScrollback()
-			Task {
+		
-				if resuming {
+		DispatchQueue.main.async {
-					if let handler = await self.handler {
-						for chunk in handler.scrollback {
-							await MainActor.run {
-								self.feed(text: chunk)
-							}
-						}
-					}
-				}
-			}
-		}
-
-		sshQueue.async {
 			Task {
 				guard let handler = await self.handler else { return }
 				while handler.connected {
@@ -52,7 +38,6 @@ final class SSHTerminalView: TerminalView, Sendable, @preconcurrency TerminalVie
 	}
 	
 	public override init(frame: CGRect) {
-		self.resuming = false
 		super.init(frame: frame)
 		terminalDelegate = self
 	}
@@ -100,4 +85,16 @@ final class SSHTerminalView: TerminalView, Sendable, @preconcurrency TerminalVie
 	public func bell(source: TerminalView) {
 		handler?.ring()
 	}
+	
+	func restoreScrollback() {
+		guard let scrollback = handler?.scrollback else { return }
+		
+		DispatchQueue.main.asyncAfter(deadline: .now() + 0.05) {
+			for line in scrollback {
+				self.feed(text: line)
+			}
+			self.setNeedsLayout()
+			self.setNeedsDisplay()
+		}
+	}
 }

ShhShell/Views/Terminal/ShellView.swift

@@ -9,7 +9,6 @@ import SwiftUI
 
 struct ShellView: View {
 	@ObservedObject var handler: SSHHandler
-	@State var resuming: Bool = false
 	
 	@Environment(\.dismiss) var dismiss
 	
@@ -33,7 +32,7 @@ struct ShellView: View {
 				}
 			}
 			.task {
-				terminalControllerRef = TerminalController(handler: handler, resuming: resuming)
+				terminalControllerRef = TerminalController(handler: handler)
 			}
 			.toolbar {
 				ToolbarItem {

ShhShell/Views/Terminal/TerminalController.swift

@@ -12,7 +12,6 @@ import SwiftTerm
 
 struct TerminalController: UIViewRepresentable {
 	@ObservedObject var handler: SSHHandler
-	@State var resuming: Bool
 	
 	func makeUIView(context: Context) -> TerminalView {
 		let tv = SSHTerminalView(
@@ -20,8 +19,7 @@ struct TerminalController: UIViewRepresentable {
 				origin: CGPoint(x: 0, y: 0),
 				size: .zero
 			),
-			handler: handler,
+			handler: handler
-			resuming: resuming
 		)
 		
 		tv.translatesAutoresizingMaskIntoConstraints = false