GitRemoteSettings -> Let a custom SSH key be provided

Just like during the GitHost Setup.

assets/langs/en.yaml

@@ -332,6 +332,7 @@ setup:
     openDeploy: Open Deploy Key Webpage
     clone: Clone Repo
     addDeploy: Adding as a Deploy Key
+    save: Save
   sshKeyChoice:
     title: We need SSH keys to authenticate -
     generate: Generate new keys

lib/screens/settings_git_remote.dart

@@ -56,6 +56,12 @@ class _GitRemoteSettingsScreenState extends State<GitRemoteSettingsScreen> {
             onPressed: () => _generateSshKey(context),
           ),
         ),
+        Builder(
+          builder: (BuildContext context) => Button(
+            text: tr('setup.sshKeyChoice.custom'),
+            onPressed: _customSshKeys,
+          ),
+        ),
         ListPreference(
           title: tr('settings.ssh.syncFreq'),
           currentOption: settings.remoteSyncFrequency.toPublicString(),
@@ -87,13 +93,44 @@ class _GitRemoteSettingsScreenState extends State<GitRemoteSettingsScreen> {
           },
         ),
       ),
-      body: Padding(
-        padding: const EdgeInsets.all(16.0),
-        child: body,
+      body: SingleChildScrollView(
+        child: Padding(
+          padding: const EdgeInsets.all(16.0),
+          child: body,
+        ),
       ),
     );
   }
 
+  void _customSshKeys() {
+    var route = MaterialPageRoute(
+      builder: (context) => Scaffold(
+        body: GitHostUserProvidedKeys(
+          doneFunction: _updateKeys,
+          saveText: tr("setup.sshKey.save"),
+        ),
+        appBar: AppBar(
+          title: Text(tr('setup.sshKeyChoice.custom')),
+        ),
+      ),
+      settings: const RouteSettings(name: '/settings/gitRemote/customKeys'),
+    );
+    Navigator.of(context).push(route);
+  }
+
+  void _updateKeys(String publicKey, String privateKey) {
+    var settings = Provider.of<Settings>(context, listen: false);
+
+    if (publicKey.isEmpty || privateKey.isEmpty) {
+      return;
+    }
+    settings.sshPublicKey = publicKey;
+    settings.sshPrivateKey = privateKey;
+    settings.save();
+
+    Navigator.of(context).pop();
+  }
+
   void _copyKeyToClipboard(BuildContext context) {
     Clipboard.setData(ClipboardData(text: widget.sshPublicKey));
     showSnackbar(context, tr('setup.sshKey.copied'));

lib/setup/sshkey.dart

@@ -204,10 +204,12 @@ class GitHostSetupKeyChoice extends StatelessWidget {
 }
 
 class GitHostUserProvidedKeys extends StatefulWidget {
-  final Func2<String, String, void> doneFunction;
+  final Func2<String, String, void> doneFunction; // public, private
+  final String saveText;
 
   GitHostUserProvidedKeys({
     @required this.doneFunction,
+    this.saveText = "",
   });
 
   @override
@@ -221,6 +223,8 @@ class _GitHostUserProvidedKeysState extends State<GitHostUserProvidedKeys> {
   TextEditingController _publicKeyController;
   TextEditingController _privateKeyController;
 
+  String saveText;
+
   @override
   void initState() {
     super.initState();
@@ -229,6 +233,8 @@ class _GitHostUserProvidedKeysState extends State<GitHostUserProvidedKeys> {
     _privateFormKey = GlobalKey<FormState>();
     _publicKeyController = TextEditingController();
     _privateKeyController = TextEditingController();
+
+    saveText = widget.saveText.isEmpty ? tr("setup.next") : widget.saveText;
   }
 
   @override
@@ -241,7 +247,7 @@ class _GitHostUserProvidedKeysState extends State<GitHostUserProvidedKeys> {
 
   @override
   Widget build(BuildContext context) {
-    return Container(
+    var body = Container(
       child: Column(
         children: <Widget>[
           Text(
@@ -259,7 +265,7 @@ class _GitHostUserProvidedKeysState extends State<GitHostUserProvidedKeys> {
           PrivateKeyEditor(_privateFormKey, _privateKeyController),
           const SizedBox(height: 16.0),
           GitHostSetupButton(
-            text: tr("setup.next"),
+            text: saveText,
             onPressed: () {
               var publicValid = _publicFormKey.currentState.validate();
               var privateValid = _privateFormKey.currentState.validate();
@@ -286,6 +292,13 @@ class _GitHostUserProvidedKeysState extends State<GitHostUserProvidedKeys> {
         crossAxisAlignment: CrossAxisAlignment.start,
       ),
     );
+
+    return SingleChildScrollView(
+      child: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: body,
+      ),
+    );
   }
 }