ui,tunnel: support DNS search domains

wg-quick has supported this for a while, but not the config layer, and
not the Go backend, so wire this all up.

Requested-by: Alexis Geoffrey <alexis.geoffrey97@gmail.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

4 files changed, 40 insertions, 6 deletions

diff --git a/ui/src/main/java/com/wireguard/android/databinding/BindingAdapters.kt b/ui/src/main/java/com/wireguard/android/databinding/BindingAdapters.kt
index adc42e7b..e5ff4bc9 100644
--- a/ui/src/main/java/com/wireguard/android/databinding/BindingAdapters.kt
+++ b/ui/src/main/java/com/wireguard/android/databinding/BindingAdapters.kt
@@ -153,6 +153,12 @@ object BindingAdapters {
     }
 
     @JvmStatic
+    @BindingAdapter("android:text")
+    fun setStringSetText(view: TextView, strings: Iterable<String?>?) {
+        view.text = if (strings != null) Attribute.join(strings) else ""
+    }
+
+    @JvmStatic
     fun tryParseInt(s: String?): Int {
         if (s == null)
             return 0
diff --git a/ui/src/main/java/com/wireguard/android/viewmodel/InterfaceProxy.kt b/ui/src/main/java/com/wireguard/android/viewmodel/InterfaceProxy.kt
index bd2a9831..16af043c 100644
--- a/ui/src/main/java/com/wireguard/android/viewmodel/InterfaceProxy.kt
+++ b/ui/src/main/java/com/wireguard/android/viewmodel/InterfaceProxy.kt
@@ -81,7 +81,7 @@ class InterfaceProxy : BaseObservable, Parcelable {
 
     constructor(other: Interface) {
         addresses = Attribute.join(other.addresses)
-        val dnsServerStrings = other.dnsServers.map { it.hostAddress }
+        val dnsServerStrings = other.dnsServers.map { it.hostAddress }.plus(other.dnsSearchDomains)
         dnsServers = Attribute.join(dnsServerStrings)
         excludedApplications.addAll(other.excludedApplications)
         includedApplications.addAll(other.includedApplications)
diff --git a/ui/src/main/res/layout/tunnel_detail_fragment.xml b/ui/src/main/res/layout/tunnel_detail_fragment.xml
index 16bc2ddb..8e34f082 100644
--- a/ui/src/main/res/layout/tunnel_detail_fragment.xml
+++ b/ui/src/main/res/layout/tunnel_detail_fragment.xml
@@ -167,8 +167,8 @@
                         android:layout_height="wrap_content"
                         android:contentDescription="@string/dns_servers"
                         android:nextFocusUp="@id/addresses_text"
-                        android:nextFocusDown="@id/listen_port_text"
-                        android:nextFocusForward="@id/listen_port_text"
+                        android:nextFocusDown="@id/dns_search_domains_text"
+                        android:nextFocusForward="@id/dns_search_domains_text"
                         android:onClick="@{ClipboardUtils::copyTextView}"
                         android:text="@{config.interface.dnsServers}"
                         android:visibility="@{config.interface.dnsServers.isEmpty() ? android.view.View.GONE : android.view.View.VISIBLE}"
@@ -177,6 +177,33 @@
                         tools:text="8.8.8.8, 8.8.4.4" />
 
                     <TextView
+                        android:id="@+id/dns_search_domains_label"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:layout_marginTop="8dp"
+                        android:labelFor="@+id/dns_search_domain_text"
+                        android:text="@string/dns_search_domains"
+                        android:visibility="@{config.interface.dnsSearchDomains.isEmpty() ? android.view.View.GONE : android.view.View.VISIBLE}"
+                        app:layout_constraintStart_toStartOf="parent"
+                        app:layout_constraintTop_toBottomOf="@id/dns_servers_text" />
+
+                    <TextView
+                        android:id="@+id/dns_search_domains_text"
+                        style="@style/DetailText"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:contentDescription="@string/dns_search_domains"
+                        android:nextFocusUp="@id/dns_servers_text"
+                        android:nextFocusDown="@id/listen_port_text"
+                        android:nextFocusForward="@id/listen_port_text"
+                        android:onClick="@{ClipboardUtils::copyTextView}"
+                        android:text="@{config.interface.dnsSearchDomains}"
+                        android:visibility="@{config.interface.dnsSearchDomains.isEmpty() ? android.view.View.GONE : android.view.View.VISIBLE}"
+                        app:layout_constraintStart_toStartOf="parent"
+                        app:layout_constraintTop_toBottomOf="@+id/dns_search_domains_label"
+                        tools:text="zx2c4.com" />
+
+                    <TextView
                         android:id="@+id/listen_port_label"
                         android:layout_width="0dp"
                         android:layout_height="wrap_content"
@@ -187,7 +214,7 @@
                         app:layout_constraintEnd_toStartOf="@id/mtu_label"
                         app:layout_constraintHorizontal_weight="0.5"
                         app:layout_constraintStart_toStartOf="parent"
-                        app:layout_constraintTop_toBottomOf="@id/dns_servers_text" />
+                        app:layout_constraintTop_toBottomOf="@id/dns_search_domains_text" />
 
                     <TextView
                         android:id="@+id/listen_port_text"
@@ -196,7 +223,7 @@
                         android:layout_height="wrap_content"
                         android:contentDescription="@string/listen_port"
                         android:nextFocusRight="@id/mtu_text"
-                        android:nextFocusUp="@id/dns_servers_text"
+                        android:nextFocusUp="@id/dns_search_domains_text"
                         android:nextFocusDown="@id/applications_text"
                         android:nextFocusForward="@id/mtu_text"
                         android:onClick="@{ClipboardUtils::copyTextView}"
@@ -220,7 +247,7 @@
                         app:layout_constraintHorizontal_weight="0.5"
                         app:layout_constraintLeft_toRightOf="@id/listen_port_label"
                         app:layout_constraintStart_toEndOf="@id/listen_port_label"
-                        app:layout_constraintTop_toBottomOf="@id/dns_servers_text" />
+                        app:layout_constraintTop_toBottomOf="@id/dns_search_domains_text" />
 
                     <TextView
                         android:id="@+id/mtu_text"
diff --git a/ui/src/main/res/values/strings.xml b/ui/src/main/res/values/strings.xml
index 3be69798..badae61e 100644
--- a/ui/src/main/res/values/strings.xml
+++ b/ui/src/main/res/values/strings.xml
@@ -109,6 +109,7 @@
     <string name="disable_config_export_title">Disable config exporting</string>
     <string name="disable_config_export_description">Disabling config exporting makes private keys less accessible</string>
     <string name="dns_servers">DNS servers</string>
+    <string name="dns_search_domains">Search domains</string>
     <string name="edit">Edit</string>
     <string name="endpoint">Endpoint</string>
     <string name="error_down">Error bringing down tunnel: %s</string>