Use validation instead of two-way binding

This is insane, but it appears to be working. We essentially store
things in a separate class for editing, and then commit it back at a
given time.

This business with onViewStateRestored in both TunnelEditorFragment and
in TunnelDetailFragment is buggy and likely wrong.

In general TunnelEditorFragment should probably be rewritten. The
relationship with the changed name is not clear.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

app/src/main/res/layout/tunnel_detail_fragment.xml

@@ -14,6 +14,10 @@
         <variable
             name="tunnel"
             type="com.wireguard.android.model.Tunnel" />
+
+        <variable
+            name="config"
+            type="com.wireguard.config.Config.Observable" />
     </data>
 
     <ScrollView
@@ -92,7 +96,25 @@
                     android:ellipsize="end"
                     android:maxLines="1"
                     android:onClick="@{ClipboardUtils::copyTextView}"
-                    android:text="@{tunnel.config.interface.publicKey}" />
+                    android:text="@{config.interfaceSection.publicKey}" />
+
+                <TextView
+                    android:id="@+id/addresses_label"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_below="@id/public_key_text"
+                    android:layout_marginTop="8dp"
+                    android:labelFor="@+id/addresses_text"
+                    android:text="@string/addresses" />
+
+                <TextView
+                    android:id="@+id/addresses_text"
+                    style="?android:attr/textAppearanceMedium"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_below="@+id/addresses_label"
+                    android:contentDescription="@string/addresses"
+                    android:text="@{config.interfaceSection.addresses}" />
             </RelativeLayout>
 
             <LinearLayout
@@ -101,7 +123,7 @@
                 android:layout_marginBottom="4dp"
                 android:divider="@null"
                 android:orientation="vertical"
-                app:items="@{tunnel.config.peers}"
+                app:items="@{config.peers}"
                 app:layout="@{@layout/tunnel_detail_peer}"
                 tools:ignore="UselessLeaf" />
         </LinearLayout>

app/src/main/res/layout/tunnel_detail_peer.xml

@@ -5,13 +5,9 @@
 
         <import type="com.wireguard.android.util.ClipboardUtils" />
 
-        <variable
-            name="collection"
-            type="android.databinding.ObservableList&lt;com.wireguard.config.Peer&gt;" />
-
         <variable
             name="item"
-            type="com.wireguard.config.Peer" />
+            type="com.wireguard.config.Peer.Observable" />
     </data>
 
     <RelativeLayout
@@ -69,7 +65,7 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_below="@+id/allowed_ips_label"
-            android:text="@{item.allowedIPsString}" />
+            android:text="@{item.allowedIPs}" />
 
         <TextView
             android:id="@+id/endpoint_label"
@@ -86,6 +82,6 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_below="@+id/endpoint_label"
-            android:text="@{item.endpointString}" />
+            android:text="@{item.endpoint}" />
     </RelativeLayout>
 </layout>

app/src/main/res/layout/tunnel_editor_fragment.xml

@@ -15,11 +15,7 @@
 
         <variable
             name="config"
-            type="com.wireguard.config.Config" />
-
-        <variable
-            name="name"
-            type="android.databinding.ObservableField&lt;String&gt;" />
+            type="com.wireguard.config.Config.Observable" />
     </data>
 
     <com.commonsware.cwac.crossport.design.widget.CoordinatorLayout
@@ -71,7 +67,7 @@
                         android:layout_height="wrap_content"
                         android:layout_below="@+id/interface_name_label"
                         android:inputType="textNoSuggestions|textVisiblePassword"
-                        android:text="@={name}"
+                        android:text="@={config.name}"
                         app:filter="@{NameInputFilter.newInstance()}" />
 
                     <TextView
@@ -91,7 +87,7 @@
                         android:layout_toStartOf="@+id/generate_private_key_button"
                         android:contentDescription="@string/public_key_description"
                         android:inputType="textNoSuggestions|textVisiblePassword"
-                        android:text="@={config.interface.privateKey}"
+                        android:text="@={config.interfaceSection.privateKey}"
                         app:filter="@{KeyInputFilter.newInstance()}" />
 
                     <Button
@@ -101,7 +97,7 @@
                         android:layout_alignBottom="@id/private_key_text"
                         android:layout_alignParentEnd="true"
                         android:layout_below="@+id/private_key_label"
-                        android:onClick="@{() -> config.interface.generateKeypair()}"
+                        android:onClick="@{() -> config.interfaceSection.generateKeypair()}"
                         android:text="@string/generate" />
 
                     <TextView
@@ -124,7 +120,7 @@
                         android:maxLines="1"
                         android:contentDescription="@string/public_key_description"
                         android:onClick="@{ClipboardUtils::copyTextView}"
-                        android:text="@{config.interface.publicKey}" />
+                        android:text="@{config.interfaceSection.publicKey}" />
 
                     <TextView
                         android:id="@+id/addresses_label"
@@ -144,7 +140,7 @@
                         android:layout_below="@+id/addresses_label"
                         android:layout_toStartOf="@+id/listen_port_text"
                         android:inputType="textNoSuggestions|textVisiblePassword"
-                        android:text="@={config.interface.addressString}" />
+                        android:text="@={config.interfaceSection.addresses}" />
 
                     <TextView
                         android:id="@+id/listen_port_label"
@@ -165,7 +161,7 @@
                         android:layout_alignStart="@+id/generate_private_key_button"
                         android:hint="@string/hint_random"
                         android:inputType="number"
-                        android:text="@={config.interface.listenPortString}"
+                        android:text="@={config.interfaceSection.listenPort}"
                         android:textAlignment="center" />
 
                     <TextView
@@ -186,7 +182,7 @@
                         android:layout_below="@+id/dns_servers_label"
                         android:layout_toStartOf="@+id/mtu_text"
                         android:inputType="textNoSuggestions|textVisiblePassword"
-                        android:text="@={config.interface.dnsString}" />
+                        android:text="@={config.interfaceSection.dnses}" />
 
                     <TextView
                         android:id="@+id/mtu_label"
@@ -207,7 +203,7 @@
                         android:layout_alignStart="@+id/generate_private_key_button"
                         android:hint="@string/hint_automatic"
                         android:inputType="number"
-                        android:text="@={config.interface.mtuString}"
+                        android:text="@={config.interfaceSection.mtu}"
                         android:textAlignment="center" />
                 </RelativeLayout>
 
@@ -226,7 +222,7 @@
                     android:layout_marginBottom="4dp"
                     android:layout_marginEnd="4dp"
                     android:layout_marginStart="4dp"
-                    android:onClick="@{() -> config.peers.add(Peer.newInstance())}"
+                    android:onClick="@{() -> config.peers.add(Peer.Observable.newInstance())}"
                     android:text="@string/add_peer" />
             </LinearLayout>
         </ScrollView>

app/src/main/res/layout/tunnel_editor_peer.xml

@@ -8,11 +8,11 @@
 
         <variable
             name="collection"
-            type="android.databinding.ObservableList&lt;com.wireguard.config.Peer&gt;" />
+            type="android.databinding.ObservableList&lt;com.wireguard.config.Peer.Observable&gt;" />
 
         <variable
             name="item"
-            type="com.wireguard.config.Peer" />
+            type="com.wireguard.config.Peer.Observable" />
     </data>
 
     <RelativeLayout
@@ -96,7 +96,7 @@
             android:layout_height="wrap_content"
             android:layout_below="@+id/allowed_ips_label"
             android:inputType="textNoSuggestions|textVisiblePassword"
-            android:text="@={item.allowedIPsString}" />
+            android:text="@={item.allowedIPs}" />
 
         <TextView
             android:id="@+id/endpoint_label"
@@ -116,7 +116,7 @@
             android:layout_below="@+id/endpoint_label"
             android:layout_toStartOf="@+id/persistent_keepalive_text"
             android:inputType="textNoSuggestions|textVisiblePassword"
-            android:text="@={item.endpointString}" />
+            android:text="@={item.endpoint}" />
 
         <TextView
             android:id="@+id/persistent_keepalive_label"
@@ -136,7 +136,7 @@
             android:layout_alignStart="@+id/persistent_keepalive_label"
             android:hint="@string/hint_optional"
             android:inputType="number"
-            android:text="@={item.persistentKeepaliveString}"
+            android:text="@={item.persistentKeepalive}"
             android:textAlignment="center" />
     </RelativeLayout>
 </layout>