Refactoring

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

@@ -46,7 +46,6 @@ import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.inputmethod.EditorInfo;
-import android.webkit.URLUtil;
 import android.widget.Button;
 import android.widget.CheckBox;
 import android.widget.CompoundButton;
@@ -139,26 +138,7 @@ public class FragmentDialogOpenLink extends FragmentDialogBase {
         // Preload web view
         Helper.customTabsWarmup(context);
 
-        final Uri uri;
-        if (_uri.getScheme() == null) {
-            String url = _uri.toString();
-            if (Helper.EMAIL_ADDRESS.matcher(url).matches())
-                uri = Uri.parse("mailto:" + _uri.toString());
-            else if (android.util.Patterns.PHONE.matcher(url).matches())
-                // Alternative: PhoneNumberUtils.isGlobalPhoneNumber()
-                uri = Uri.parse("tel:" + _uri.toString());
-            else {
-                Uri g = Uri.parse(URLUtil.guessUrl(url));
-                String scheme = g.getScheme();
-                if (scheme != null) {
-                    if ("http".equals(scheme))
-                        scheme = "https";
-                    uri = Uri.parse(scheme + "://" + _uri.toString());
-                } else
-                    uri = _uri;
-            }
-        } else
-            uri = _uri;
+        final Uri uri = UriHelper.guessScheme(_uri);
 
         // Process link
         final Uri sanitized;

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

@@ -20,7 +20,9 @@ package eu.faircode.email;
 */
 
 import android.content.Context;
+import android.net.Uri;
 import android.text.TextUtils;
+import android.webkit.URLUtil;
 
 import androidx.annotation.NonNull;
 
@@ -96,6 +98,28 @@ public class UriHelper {
         return null;
     }
 
+    static @NonNull
+    Uri guessScheme(@NonNull Uri uri) {
+        if (uri.getScheme() != null)
+            return uri;
+
+        String url = uri.toString();
+        if (Helper.EMAIL_ADDRESS.matcher(url).matches())
+            return Uri.parse("mailto:" + url);
+        else if (android.util.Patterns.PHONE.matcher(url).matches())
+            // Alternative: PhoneNumberUtils.isGlobalPhoneNumber()
+            return Uri.parse("tel:" + url);
+        else {
+            Uri g = Uri.parse(URLUtil.guessUrl(url));
+            String scheme = g.getScheme();
+            if (scheme == null)
+                return uri;
+            else if ("http".equals(scheme))
+                scheme = "https";
+            return Uri.parse(scheme + "://" + url);
+        }
+    }
+
     static void ensureSuffixList(Context context) {
         synchronized (suffixList) {
             if (suffixList.size() > 0)