Improve key screen layout

Update screenshot

Sesame/ContentView.swift

@@ -8,6 +8,9 @@ struct ContentView: View {
     @AppStorage("counter")
     var nextMessageCounter: Int = 0
 
+    @AppStorage("compensate")
+    var isCompensatingDaylightTime: Bool = false
+
     @State
     var keyManager = KeyManagement()
 
@@ -31,6 +34,10 @@ struct ContentView: View {
     @State
     private var showHistorySheet = false
 
+    var compensationTime: UInt32 {
+        isCompensatingDaylightTime ? 3600 : 0
+    }
+
     var isPerformingRequests: Bool {
         hasActiveRequest ||
         state == .waitingForResponse
@@ -109,7 +116,7 @@ struct ContentView: View {
             .frame(width: geo.size.width, height: geo.size.height)
             .animation(.easeInOut, value: state.color)
             .sheet(isPresented: $showKeySheet) {
-                KeyView(keyManager: $keyManager)
+                KeyView(keyManager: $keyManager, isCompensatingDaylightTime: $isCompensatingDaylightTime)
             }
             .sheet(isPresented: $showHistorySheet) {
                 HistoryView(manager: history)
@@ -126,8 +133,9 @@ struct ContentView: View {
 
         let count = UInt32(nextMessageCounter)
         let sentTime = Date()
+        // Add time to compensate that the device is using daylight savings time
         let content = Message.Content(
-            time: sentTime.timestamp,
+            time: sentTime.timestamp + compensationTime,
             id: count)
         let message = content.authenticate(using: key)
         let historyItem = HistoryItem(sent: message, date: sentTime)
@@ -139,7 +147,6 @@ struct ContentView: View {
             responseTime = receivedTime
             state = newState
             let finishedItem = historyItem.didReceive(response: newState, date: receivedTime, message: message)
-            print("Interval: \(receivedTime.timeIntervalSince(sentTime))", "\(finishedItem.roundTripTime ?? -1)")
             process(item: finishedItem)
         }
     }

Sesame/HistoryListItem.swift

@@ -29,10 +29,10 @@ struct HistoryListItem: View {
             return startText
         }
         let diff = Int(rCounter) - Int(sentCounter)
-        guard diff != 1 else {
+        guard diff != 1 && diff != 0 else {
             return startText
         }
-        return startText + "→\(rCounter)"
+        return startText + " (\(diff))"
     }
 
     var timeOffsetText: String {

Sesame/KeyView.swift

@@ -5,21 +5,32 @@ struct KeyView: View {
     @Binding
     var keyManager: KeyManagement
 
+    @Binding
+    var isCompensatingDaylightTime: Bool
+
     var body: some View {
-        GeometryReader { geo in
-            VStack(alignment: .leading, spacing: 16) {
-                ForEach(KeyManagement.KeyType.allCases) { keyType in
-                    SingleKeyView(
-                        keyManager: $keyManager,
-                        type: keyType)
-                }
-            }.padding()
-        }
+        ScrollView {
+        VStack(alignment: .leading, spacing: 8) {
+            ForEach(KeyManagement.KeyType.allCases) { keyType in
+                SingleKeyView(
+                    keyManager: $keyManager,
+                    type: keyType)
+            }
+            Toggle(isOn: $isCompensatingDaylightTime) {
+                Text("Compensate daylight savings time")
+            }
+            Text("If the remote has daylight savings time wrongly set, then the time validation will fail. Use this option to send messages with adjusted timestamps. Warning: Incorrect use of this option will allow replay attacks.")
+                .font(.caption)
+                .foregroundColor(.secondary)
+        }.padding()
+    }
     }
 }
 
 struct KeyView_Previews: PreviewProvider {
     static var previews: some View {
-        KeyView(keyManager: .constant(KeyManagement()))
+        KeyView(
+            keyManager: .constant(KeyManagement()),
+            isCompensatingDaylightTime: .constant(true))
     }
 }

Sesame/SingleKeyView.swift

@@ -45,13 +45,15 @@ struct SingleKeyView: View {
                     keyManager.generate(type)
                     needRefresh.toggle()
                 }
-                .padding()
+                .padding([.horizontal, .bottom])
+                .padding(.top, 4)
 
                 Button(type.usesHashing ? "Copy hash" : "Copy") {
                     UIPasteboard.general.string = copyText
                 }
                 .disabled(!hasKey)
-                .padding()
+                .padding([.horizontal, .bottom])
+                .padding(.top, 4)
                 Spacer()
             }
         }