Do not hide FAB if chatBox is visible

Author: kunall17

app/src/main/java/com/zulip/android/util/RemoveViewsOnScroll.java

@@ -4,13 +4,15 @@
 import android.content.Context;
 import android.support.design.widget.AppBarLayout;
 import android.support.design.widget.CoordinatorLayout;
+import android.support.design.widget.FloatingActionButton;
 import android.support.v4.view.ViewCompat;
 import android.support.v4.view.animation.FastOutSlowInInterpolator;
 import android.util.AttributeSet;
 import android.util.TypedValue;
 import android.view.View;
 import android.view.ViewPropertyAnimator;
 import android.view.animation.Interpolator;
+import com.zulip.android.R;
 
 /**
  * This hides the {@link AppBarLayout} and {@link android.support.design.widget.FloatingActionButton} when the
@@ -22,13 +24,13 @@ public class RemoveViewsOnScroll extends CoordinatorLayout.Behavior<View> {
     private boolean mIsShowing;
     private boolean isViewHidden;
     private static float toolbarHeight;
+    private View chatBox;
 
     public RemoveViewsOnScroll(Context context, AttributeSet attrs) {
         super(context, attrs);
         TypedValue tv = new TypedValue();
         if (context.getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true))
             toolbarHeight = TypedValue.complexToDimensionPixelSize(tv.data, context.getResources().getDisplayMetrics());
-
     }
 
     @Override
@@ -46,8 +48,16 @@ public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, View child, V
         changeInYDir += dy;
         if (changeInYDir > toolbarHeight && child.getVisibility() == View.VISIBLE && !isViewHidden)
             hideView(child);
-        else if (changeInYDir < 0 && child.getVisibility() == View.GONE && !mIsShowing)
+        else if (changeInYDir < 0 && child.getVisibility() == View.GONE && !mIsShowing) {
+            if (child instanceof FloatingActionButton) {
+                if (chatBox == null)
+                    chatBox = coordinatorLayout.findViewById(R.id.messageBoxContainer);
+                if (chatBox.getVisibility() == View.VISIBLE) {
+                    return;
+                }
+            }
             showView(child);
+        }
 
     }
 

app/src/main/java/com/zulip/android/util/SwipeRemoveLinearLayout.java

@@ -43,7 +43,6 @@ public boolean onInterceptTouchEvent(MotionEvent ev) {
                 x2 = ev.getX();
                 float deltaX = x2 - x1;
                 if (Math.abs(deltaX) > MIN_DISTANCE) {
-                    //swiping right to left
                     leftToRightSwipeListen.removeChatBox();
                     return true;
                 }