Add util methods to handle RTL/LTR text concatenations;

Add markers to external links

src/main/java/org/thoughtcrime/securesms/InstantOnboardingActivity.java

@@ -54,6 +54,7 @@ import org.thoughtcrime.securesms.relay.RelayListActivity;
 import org.thoughtcrime.securesms.scribbles.ScribbleActivity;
 import org.thoughtcrime.securesms.util.IntentUtils;
 import org.thoughtcrime.securesms.util.Prefs;
+import org.thoughtcrime.securesms.util.TextUtil;
 import org.thoughtcrime.securesms.util.Util;
 import org.thoughtcrime.securesms.util.ViewUtil;
 import org.thoughtcrime.securesms.util.views.ProgressDialog;
@@ -345,6 +346,11 @@ public class InstantOnboardingActivity extends BaseActionBarActivity implements
 
   private void showOtherOptionsDialog() {
     View view = View.inflate(this, R.layout.signup_options_view, null);
+    Button otherServerButton = view.findViewById(R.id.use_other_server);
+    if (otherServerButton != null) {
+      otherServerButton.setText(
+        TextUtil.markAsExternal(getString(R.string.instant_onboarding_other_server)));
+    }
     AlertDialog signUpDialog = new AlertDialog.Builder(this)
       .setView(view)
       .setTitle(R.string.instant_onboarding_show_more_instances)
@@ -376,9 +382,11 @@ public class InstantOnboardingActivity extends BaseActionBarActivity implements
       signUpBtn.setText(R.string.instant_onboarding_create);
       privacyPolicyBtn.setTextColor(getResources().getColor(R.color.delta_accent));
       if (DEFAULT_CHATMAIL_HOST.equals(providerHost)) {
-        privacyPolicyBtn.setText(getString(R.string.instant_onboarding_agree_default2, providerHost));
+        privacyPolicyBtn.setText(TextUtil.markAsExternal(
+          getString(R.string.instant_onboarding_agree_default2, providerHost)));
       } else {
-        privacyPolicyBtn.setText(getString(R.string.instant_onboarding_agree_instance, providerHost));
+        privacyPolicyBtn.setText(TextUtil.markAsExternal(
+          getString(R.string.instant_onboarding_agree_instance, providerHost)));
       }
     }
   }

src/main/java/org/thoughtcrime/securesms/LocalHelpActivity.java

@@ -5,6 +5,7 @@ import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
 
+import org.thoughtcrime.securesms.util.TextUtil;
 import org.thoughtcrime.securesms.util.Util;
 
 import java.io.InputStream;
@@ -51,6 +52,28 @@ public class LocalHelpActivity extends WebViewActivity
   public boolean onPrepareOptionsMenu(Menu menu) {
     super.onPrepareOptionsMenu(menu);
     this.getMenuInflater().inflate(R.menu.local_help, menu);
+
+    // Append " ↗" to external link buttons
+    MenuItem item = menu.findItem(R.id.learn_more);
+    if (item != null) {
+      item.setTitle(TextUtil.markAsExternal(getString(R.string.delta_chat_homepage)));
+    }
+
+    item = menu.findItem(R.id.privacy_policy);
+    if (item != null) {
+      item.setTitle(TextUtil.markAsExternal(getString(R.string.privacy_policy)));
+    }
+
+    item = menu.findItem(R.id.contribute);
+    if (item != null) {
+      item.setTitle(TextUtil.markAsExternal(getString(R.string.contribute)));
+    }
+
+    item = menu.findItem(R.id.report_issue);
+    if (item != null) {
+      item.setTitle(TextUtil.markAsExternal(getString(R.string.global_menu_help_report_desktop)));
+    }
+
     return true;
   }
 

src/main/java/org/thoughtcrime/securesms/util/TextUtil.java

@@ -0,0 +1,16 @@
+package org.thoughtcrime.securesms.util;
+
+import androidx.annotation.NonNull;
+import androidx.core.text.BidiFormatter;
+
+public class TextUtil {
+  @NonNull
+  public static String bidiAppend(String text, String suffix) {
+    return BidiFormatter.getInstance().unicodeWrap(text) + suffix;
+  }
+
+  @NonNull
+  public static String markAsExternal(String text) {
+    return bidiAppend(text, " ↗");
+  }
+}