Added whois info button

app/src/main/java/eu/faircode/email/FragmentDialogOpenLink.java

@@ -454,9 +454,18 @@ public class FragmentDialogOpenLink extends FragmentDialogBase {
                         final View dview = LayoutInflater.from(context).inflate(R.layout.dialog_whois, null);
                         final TextView tvHost = dview.findViewById(R.id.tvHost);
                         final TextView tvWhois = dview.findViewById(R.id.tvWhois);
+                        final ImageButton ibInfo = dview.findViewById(R.id.ibInfo);
 
                         tvWhois.setMovementMethod(LinkMovementMethod.getInstance());
 
+                        ibInfo.setOnClickListener(new View.OnClickListener() {
+                            @Override
+                            public void onClick(View v) {
+                                Uri uri = Uri.parse("https://en.wikipedia.org/wiki/WHOIS");
+                                Helper.view(v.getContext(), uri, true);
+                            }
+                        });
+
                         tvHost.setText(args.getString("host"));
                         tvWhois.setText(whois);
 

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

@@ -19,10 +19,24 @@
             android:drawablePadding="6dp"
             android:text="@string/title_whois"
             android:textAppearance="@style/TextAppearance.AppCompat.Large"
-            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintEnd_toStartOf="@+id/ibInfo"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent" />
 
+        <ImageButton
+            android:id="@+id/ibInfo"
+            android:layout_width="36dp"
+            android:layout_height="36dp"
+            android:background="?android:attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/title_info"
+            android:padding="6dp"
+            android:scaleType="fitCenter"
+            android:tooltipText="@string/title_info"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:srcCompat="@drawable/twotone_info_24"
+            app:tint="?attr/colorAccent" />
+
         <TextView
             android:id="@+id/tvHost"
             android:layout_width="0dp"