Move attachment options as input bar expands

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationActivityV2.kt

@@ -12,6 +12,7 @@ import android.view.Menu
 import android.view.MenuItem
 import android.view.MotionEvent
 import android.widget.RelativeLayout
+import androidx.core.view.marginBottom
 import androidx.loader.app.LoaderManager
 import androidx.loader.content.Loader
 import androidx.recyclerview.widget.LinearLayoutManager
@@ -154,6 +155,12 @@ class ConversationActivityV2 : PassphraseRequiredActionBarActivity(), InputBarDe
         val recyclerViewLayoutParams = conversationRecyclerView.layoutParams as RelativeLayout.LayoutParams
         recyclerViewLayoutParams.bottomMargin = newValue
         conversationRecyclerView.layoutParams = recyclerViewLayoutParams
+        val attachmentButtonHeight = inputBar.attachmentsButtonContainer.height
+        val bottomMargin = (newValue - attachmentButtonHeight) / 2
+        val margin = toPx(8, resources)
+        val attachmentOptionsContainerLayoutParams = attachmentOptionsContainer.layoutParams as RelativeLayout.LayoutParams
+        attachmentOptionsContainerLayoutParams.bottomMargin = bottomMargin + attachmentButtonHeight + margin
+        attachmentOptionsContainer.layoutParams = attachmentOptionsContainerLayoutParams
     }
 
     override fun toggleAttachmentOptions() {

app/src/main/res/layout/activity_conversation_v2.xml

@@ -12,7 +12,14 @@
         android:layout_height="match_parent"
         android:layout_marginBottom="@dimen/input_bar_height" />
 
+    <org.thoughtcrime.securesms.conversation.v2.input_bar.InputBar
+        android:id="@+id/inputBar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true" />
+
     <LinearLayout
+        android:id="@+id/attachmentOptionsContainer"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="@dimen/small_spacing"
@@ -50,12 +57,6 @@
 
     </LinearLayout>
 
-    <org.thoughtcrime.securesms.conversation.v2.input_bar.InputBar
-        android:id="@+id/inputBar"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_alignParentBottom="true" />
-
     <org.thoughtcrime.securesms.conversation.v2.input_bar.InputBarRecordingView
         android:id="@+id/inputBarRecordingView"
         android:layout_width="match_parent"