Linkify links in long message view.

Fixes #8735

src/org/thoughtcrime/securesms/longmessage/LongMessageActivity.java

@@ -8,17 +8,24 @@ import android.graphics.drawable.ColorDrawable;
 import android.os.Build;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
+import android.text.SpannableString;
+import android.text.method.LinkMovementMethod;
+import android.text.style.URLSpan;
+import android.text.util.Linkify;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import com.annimon.stream.Stream;
+
 import org.thoughtcrime.securesms.PassphraseRequiredActionBarActivity;
 import org.thoughtcrime.securesms.R;
 import org.thoughtcrime.securesms.color.MaterialColor;
 import org.thoughtcrime.securesms.components.ConversationItemFooter;
 import org.thoughtcrime.securesms.database.Address;
+import org.thoughtcrime.securesms.linkpreview.LinkPreviewUtil;
 import org.thoughtcrime.securesms.recipients.Recipient;
 import org.thoughtcrime.securesms.recipients.RecipientModifiedListener;
 import org.thoughtcrime.securesms.util.DynamicLanguage;
@@ -142,8 +149,21 @@ public class LongMessageActivity extends PassphraseRequiredActionBarActivity imp
       ConversationItemFooter footer = bubble.findViewById(R.id.longmessage_footer);
 
       bubble.setVisibility(View.VISIBLE);
-      text.setText(message.get().getFullBody());
+      text.setText(linkifyMessageBody(new SpannableString(message.get().getFullBody())));
+      text.setMovementMethod(LinkMovementMethod.getInstance());
       footer.setMessageRecord(message.get().getMessageRecord(), dynamicLanguage.getCurrentLocale());
     });
   }
+
+  private SpannableString linkifyMessageBody(SpannableString messageBody) {
+    int     linkPattern = Linkify.WEB_URLS | Linkify.EMAIL_ADDRESSES | Linkify.PHONE_NUMBERS;
+    boolean hasLinks    = Linkify.addLinks(messageBody, linkPattern);
+
+    if (hasLinks) {
+      Stream.of(messageBody.getSpans(0, messageBody.length(), URLSpan.class))
+            .filterNot(url -> LinkPreviewUtil.isLegalUrl(url.getURL()))
+            .forEach(messageBody::removeSpan);
+    }
+    return messageBody;
+  }
 }