add scroll to first/last entry on empty search

src/org/thoughtcrime/securesms/ConversationActivity.java

@@ -1572,6 +1572,13 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
       if(searchResultPosition<0) searchResultPosition = searchResult.length-1;
       if(searchResultPosition>=searchResult.length) searchResultPosition = 0;
       fragment.scrollToMsgId(searchResult[searchResultPosition]);
+    } else {
+      // no search, scroll to first/last message
+      if(searchNext) {
+        fragment.scrollToBottom();
+      } else {
+        fragment.scrollToTop();
+      }
     }
   }
 

src/org/thoughtcrime/securesms/ConversationFragment.java

@@ -310,6 +310,16 @@ public class ConversationFragment extends Fragment
         }
     }
 
+    public void scrollToTop() {
+        ConversationAdapter adapter = (ConversationAdapter)list.getAdapter();
+        if (adapter.getItemCount()>0) {
+            final int pos = adapter.getItemCount()-1;
+            list.post(() -> {
+                list.getLayoutManager().scrollToPosition(pos);
+            });
+        }
+    }
+
     public void scrollToBottom() {
         if (((LinearLayoutManager) list.getLayoutManager()).findFirstVisibleItemPosition() < SCROLL_ANIMATION_THRESHOLD) {
             list.smoothScrollToPosition(0);
@@ -517,7 +527,6 @@ public class ConversationFragment extends Fragment
         int position = adapter.msgIdToPosition(msgId);
         if (position!=-1) {
             scrollToStartingPosition(position);
-            Log.i("Delta Chat", String.format(">>>>>>>>>>>>>>>>>>> %d", position));
         }
     }