Set to scroll to last item when keyboard opens

app/src/main/java/chat/rocket/android/chatroom/ui/ChatRoomFragment.kt

@@ -221,6 +221,11 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardPopup.Listener {
             actionSnackbar.text = quotedMessage
             actionSnackbar.show()
             KeyboardHelper.showSoftKeyboard(text_message)
+            if (!recycler_view.isAtBottom()) {
+                if (adapter.itemCount > 0) {
+                    recycler_view.scrollToPosition(0)
+                }
+            }
         }
     }
 
@@ -317,6 +322,11 @@ class ChatRoomFragment : Fragment(), ChatRoomView, EmojiKeyboardPopup.Listener {
             emojiKeyboardPopup.listener = this
             text_message.listener = object : ComposerEditText.ComposerEditTextListener {
                 override fun onKeyboardOpened() {
+                    if (recycler_view.isAtBottom()) {
+                        if (adapter.itemCount > 0) {
+                            recycler_view.scrollToPosition(0)
+                        }
+                    }
                 }
 
                 override fun onKeyboardClosed() {

app/src/main/java/chat/rocket/android/util/extensions/Ui.kt

@@ -6,6 +6,8 @@ import android.support.annotation.LayoutRes
 import android.support.annotation.StringRes
 import android.support.v4.app.Fragment
 import android.support.v7.app.AppCompatActivity
+import android.support.v7.widget.LinearLayoutManager
+import android.support.v7.widget.RecyclerView
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -54,4 +56,13 @@ fun Activity.showToast(message: String, duration: Int = Toast.LENGTH_SHORT) = To
 
 fun Fragment.showToast(@StringRes resource: Int, duration: Int = Toast.LENGTH_SHORT) = showToast(getString(resource), duration)
 
-fun Fragment.showToast(message: String, duration: Int = Toast.LENGTH_SHORT) = activity!!.showToast(message, duration)
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+fun Fragment.showToast(message: String, duration: Int = Toast.LENGTH_SHORT) = activity!!.showToast(message, duration)
+
+fun RecyclerView.isAtBottom(): Boolean {
+    val manager: RecyclerView.LayoutManager? = layoutManager
+    if (manager is LinearLayoutManager) {
+        return manager.findFirstVisibleItemPosition() == 0
+    }
+
+    return false // or true??? we can't determine the first visible item.
+}
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