Narrow to conversation by clicking on message title

Author: niftynei

app/src/main/java/com/zulip/android/MessageAdapter.java

@@ -2,6 +2,7 @@
 
 import java.io.IOException;
 import java.net.URL;
+import java.util.Arrays;
 import java.util.List;
 
 import org.ccil.cowan.tagsoup.HTMLSchema;
@@ -79,7 +80,15 @@ public View getView(int position, View convertView, ViewGroup group) {
         if (message.getType() != MessageType.STREAM_MESSAGE) {
             display_recipient.setText(context.getString(R.string.huddle_text, message.getDisplayRecipient(context.app)));
             display_recipient.setTextColor(Color.WHITE);
-            display_recipient.setOnClickListener(null);
+            display_recipient.setOnClickListener(new View.OnClickListener() {
+                @Override
+                public void onClick(View v) {
+                    if (getContext() instanceof NarrowListener) {
+                        ((NarrowListener) getContext()).onNarrow(new NarrowFilterPM(
+                                Arrays.asList(message.getRecipients((ZulipApp.get())))));
+                    }
+                }
+            });
         } else {
             display_recipient.setText(message.getDisplayRecipient(context.app));
             display_recipient.setTextColor(Color.BLACK);

app/src/main/java/com/zulip/android/MessageListFragment.java

@@ -297,7 +297,9 @@ public boolean onContextItemSelected(MenuItem item) {
                 mListener.openCompose(message.getSender().getEmail());
                 return true;
             case R.id.narrow_to_private:
-                ((ZulipActivity) getActivity()).doNarrow(new NarrowFilterPM(Arrays.asList(message.getRecipients(app))));
+                if (getActivity() instanceof NarrowListener) {
+                    ((NarrowListener) getActivity()).onNarrow(new NarrowFilterPM(Arrays.asList(message.getRecipients(app))));
+                }
                 return true;
             case R.id.narrow_to_stream:
                 if (getActivity() instanceof NarrowListener) {