Focus some text fields on appearance (#334)

Feature from iOS 15, use it on:

- New profile name
- New profile passphrase
- Renamed profile name
- Account username

Passepartout/App/Views/AccountView.swift

@@ -27,6 +27,14 @@ import PassepartoutLibrary
 import SwiftUI
 
 struct AccountView: View {
+    enum Field {
+        case username
+
+        case password
+
+        case seed
+    }
+
     @ObservedObject private var providerManager: ProviderManager
 
     private let providerName: ProviderName?
@@ -41,6 +49,8 @@ struct AccountView: View {
 
     @State private var liveAccount = Profile.Account()
 
+    @FocusState private var focusedField: Field?
+
     init(
         providerName: ProviderName?,
         vpnProtocol: VPNProtocolType,
@@ -71,6 +81,7 @@ struct AccountView: View {
                 TextField(usernamePlaceholder ?? L10n.Account.Items.Username.placeholder, text: $liveAccount.username)
                     .textContentType(.username)
                     .keyboardType(.emailAddress)
+                    .focused($focusedField, equals: .username)
                     .themeRawTextStyle()
                     .withLeadingText(L10n.Account.Items.Username.caption)
 
@@ -80,12 +91,14 @@ struct AccountView: View {
                         EmptyView()
                     } else {
                         themeSecureField(L10n.Account.Items.Password.placeholder, text: $liveAccount.password)
+                            .focused($focusedField, equals: .password)
                             .withLeadingText(L10n.Account.Items.Password.caption)
                     }
 
-                    // TODO: interactive, scan QR code
                 case .totp:
+                    // TODO: interactive, scan QR code
                     themeSecureField(L10n.Account.Items.Password.placeholder, text: $liveAccount.password, contentType: .oneTimeCode)
+                        .focused($focusedField, equals: .seed)
                         .withLeadingText(L10n.Account.Items.Seed.caption)
                 }
             } footer: {
@@ -111,6 +124,8 @@ struct AccountView: View {
                 saveAnyway: saveAnyway,
                 onSave: onSave
             )
+        }.onAppear {
+            focusedField = .username
         }.navigationTitle(L10n.Account.title)
     }
 }

Passepartout/App/Views/AddHostView+Name.swift

@@ -42,6 +42,8 @@ extension AddHostView {
 
         @State private var isEnteringCredentials = false
 
+        @FocusState private var focusedField: AddProfileView.Field?
+
         init(
             url: URL,
             deletingURLOnSuccess: Bool,
@@ -75,7 +77,11 @@ extension AddHostView {
                 isPresented: $viewModel.isAskingOverwrite,
                 actions: alertOverwriteActions,
                 message: alertOverwriteMessage
-            ).onAppear(perform: requestResourcePermissions)
+            ).onChange(of: viewModel.requiresPassphrase) {
+                if $0 {
+                    focusedField = .passphrase
+                }
+            }.onAppear(perform: requestResourcePermissions)
             .onDisappear(perform: dropResourcePermissions)
             .navigationTitle(L10n.AddProfile.Shared.title)
             .themeSecondaryView()
@@ -91,6 +97,7 @@ private extension AddHostView.NameView {
     var mainView: some View {
         AddProfileView.ProfileNameSection(
             profileName: $viewModel.profileName,
+            focusedField: $focusedField,
             errorMessage: viewModel.errorMessage
         ) {
             processProfile(replacingExisting: false)
@@ -118,7 +125,7 @@ private extension AddHostView.NameView {
         Section {
             SecureField(L10n.AddProfile.Host.Sections.Encryption.footer, text: $viewModel.encryptionPassphrase) {
                 processProfile(replacingExisting: false)
-            }
+            }.focused($focusedField, equals: .passphrase)
         } header: {
             Text(L10n.Global.Strings.encryption)
         }

Passepartout/App/Views/AddProfileView.swift

@@ -27,6 +27,12 @@ import PassepartoutLibrary
 import SwiftUI
 
 enum AddProfileView {
+    enum Field {
+        case name
+
+        case passphrase
+    }
+
     struct Bindings {
         @Binding var isPresented: Bool
     }
@@ -34,6 +40,8 @@ enum AddProfileView {
     struct ProfileNameSection: View {
         @Binding var profileName: String
 
+        @FocusState.Binding var focusedField: Field?
+
         let errorMessage: String?
 
         let onCommit: () -> Void
@@ -41,11 +49,14 @@ enum AddProfileView {
         var body: some View {
             Section {
                 TextField(L10n.Global.Placeholders.profileName, text: $profileName, onCommit: onCommit)
+                    .focused($focusedField, equals: .name)
                     .themeValidProfileName()
             } header: {
                 Text(L10n.Global.Strings.name)
             } footer: {
                 themeErrorMessage(errorMessage)
+            }.onAppear {
+                focusedField = .name
             }
         }
     }

Passepartout/App/Views/AddProviderView+Name.swift

@@ -40,6 +40,8 @@ extension AddProviderView {
 
         @State private var isEnteringCredentials = false
 
+        @FocusState private var focusedField: AddProfileView.Field?
+
         init(
             profile: Binding<Profile>,
             providerMetadata: ProviderMetadata,
@@ -57,6 +59,7 @@ extension AddProviderView {
                 List {
                     AddProfileView.ProfileNameSection(
                         profileName: $viewModel.profileName,
+                        focusedField: $focusedField,
                         errorMessage: viewModel.errorMessage
                     ) {
                         saveProfile(replacingExisting: false)

Passepartout/App/Views/ProfileView+Rename.swift

@@ -28,6 +28,10 @@ import SwiftUI
 
 extension ProfileView {
     struct RenameView: View {
+        enum Field {
+            case name
+        }
+
         @Environment(\.presentationMode) private var presentationMode
 
         @ObservedObject private var profileManager: ProfileManager
@@ -38,6 +42,8 @@ extension ProfileView {
 
         @State private var isOverwritingExistingProfile = false
 
+        @FocusState private var focusedField: Field?
+
         init(currentProfile: ObservableProfile) {
             profileManager = .shared
             self.currentProfile = currentProfile
@@ -48,6 +54,7 @@ extension ProfileView {
                 Section {
                     TextField(L10n.Global.Placeholders.profileName, text: $newName, onCommit: commitRenaming)
                         .themeValidProfileName()
+                        .focused($focusedField, equals: .name)
                         .onAppear(perform: loadCurrentName)
                 } header: {
                     Text(L10n.Profile.Alerts.Rename.title)
@@ -96,6 +103,7 @@ private extension ProfileView.RenameView {
 private extension ProfileView.RenameView {
     func loadCurrentName() {
         newName = currentProfile.value.header.name
+        focusedField = .name
     }
 
     func commitRenaming() {