Improve float renderer occupied area calculation

DEVSIX-1381

Author: Snipx

layout/src/main/java/com/itextpdf/layout/renderer/BlockRenderer.java

@@ -350,8 +350,6 @@ public LayoutResult layout(LayoutContext layoutContext) {
             if (result.getOccupiedArea() != null) {
                 if (!FloatingHelper.isRendererFloating(childRenderer)) { // this check is needed only if margins collapsing is enabled
                     occupiedArea.setBBox(Rectangle.getCommonRectangle(occupiedArea.getBBox(), result.getOccupiedArea().getBBox()));
-                } else if (isAbsolutePosition() && childRenderer.getOccupiedArea() != null) {
-                    occupiedArea.setBBox(Rectangle.getCommonRectangle(occupiedArea.getBBox(), childRenderer.getOccupiedArea().getBBox()));
                 }
             }
             if (marginsCollapsingEnabled) {
@@ -380,7 +378,7 @@ public LayoutResult layout(LayoutContext layoutContext) {
             occupiedArea.setBBox(Rectangle.getCommonRectangle(occupiedArea.getBBox(), layoutBox));
         }
 
-        if (FloatingHelper.isRendererFloating(this) || isCellRenderer) {
+        if (isAbsolutePosition() || FloatingHelper.isRendererFloating(this) || isCellRenderer) {
             FloatingHelper.includeChildFloatsInOccupiedArea(floatRendererAreas, this);
         }
 

layout/src/main/java/com/itextpdf/layout/renderer/FloatingHelper.java

@@ -233,15 +233,9 @@ static LayoutArea adjustResultOccupiedAreaForFloatAndClear(IRenderer renderer, L
     }
 
     static void includeChildFloatsInOccupiedArea(List<Rectangle> floatRendererAreas, IRenderer renderer) {
-        Rectangle bBox = renderer.getOccupiedArea().getBBox();
-        float lowestFloatBottom = bBox.getBottom();
         for (Rectangle floatBox : floatRendererAreas) {
-            if (floatBox.getBottom() < lowestFloatBottom) {
-                lowestFloatBottom = floatBox.getBottom();
-            }
+            renderer.getOccupiedArea().setBBox(Rectangle.getCommonRectangle(renderer.getOccupiedArea().getBBox(), floatBox));
         }
-        bBox.setHeight(bBox.getTop() - lowestFloatBottom)
-                .setY(lowestFloatBottom);
     }
 
     static MinMaxWidth calculateMinMaxWidthForFloat(AbstractRenderer renderer, FloatPropertyValue floatPropertyVal) {