Ensure FloatingToolbar is not rendered at negative x, y coordinates.

        private void refreshCoordinatesAndOverflowDirection(Rect contentRectOnScreen) {

            refreshViewPort();

            int x = contentRectOnScreen.centerX() - mPopupWindow.getWidth() / 2;

            // Update x so that the toolbar isn't rendered behind the nav bar in landscape.

            x = Math.max(0, Math.min(x, mViewPortOnScreen.right - mPopupWindow.getWidth()));

            // Initialize x ensuring that the toolbar isn't rendered behind the nav bar in

            // landscape.

            final int x = Math.min(

                    contentRectOnScreen.centerX() - mPopupWindow.getWidth() / 2,

                    mViewPortOnScreen.right - mPopupWindow.getWidth());

            final int y;

            int rootViewTopOnWindow = mTmpCoords[1];

            int windowLeftOnScreen = rootViewLeftOnScreen - rootViewLeftOnWindow;

            int windowTopOnScreen = rootViewTopOnScreen - rootViewTopOnWindow;

            mCoordsOnWindow.set(x - windowLeftOnScreen, y - windowTopOnScreen);

            mCoordsOnWindow.set(

                    Math.max(0, x - windowLeftOnScreen), Math.max(0, y - windowTopOnScreen));

        }

        /**