[CSS Regions] Add new regionOversetChange event

Source/core/rendering/RenderRegion.cpp

 /*
  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above
  *    copyright notice, this list of conditions and the following
  *    disclaimer.
@@ skipping 30 matching lines @@
 
 namespace WebCore {
 
 RenderRegion::RenderRegion(Element* element, RenderFlowThread* flowThread)
     : RenderBlock(element)
     , m_flowThread(flowThread)
     , m_parentNamedFlowThread(0)
     , m_isValid(false)
     , m_hasCustomRegionStyle(false)
     , m_hasAutoLogicalHeight(false)
-    , m_regionState(RegionUndefined)
 {
 }
 
 LayoutUnit RenderRegion::pageLogicalWidth() const
 {
     ASSERT(m_flowThread);
     return m_flowThread->isHorizontalWritingMode() ? contentWidth() : contentHeight();
 }
 
 LayoutUnit RenderRegion::pageLogicalHeight() const
@@ skipping 57 matching lines @@
         LayoutUnit minX = isFirstPortion ? (flowThreadOverflow.x() - outlineSize) : flowThreadPortionRect.x();
         LayoutUnit maxX = isLastPortion ? max(flowThreadPortionRect.maxX(), flowThreadOverflow.maxX()) + outlineSize : flowThreadPortionRect.maxX();
         LayoutUnit minY = clipY ? flowThreadPortionRect.y() : min(flowThreadPortionRect.y(), (flowThreadOverflow.y() - outlineSize));
         LayoutUnit maxY = clipY ? flowThreadPortionRect.maxY() : max(flowThreadPortionRect.y(), (flowThreadOverflow.maxY() + outlineSize));
         clipRect = LayoutRect(minX, minY, maxX - minX, maxY - minY);
     }
 
     return clipRect;
 }
 
+RegionOversetState RenderRegion::regionOversetState() const
+{
+    if (isValid() && node() && node()->isElementNode())
+        return toElement(node())->regionOversetState();
+
+    return RegionUndefined;
+}
+
+void RenderRegion::setRegionOversetState(RegionOversetState state)
+{
+    if (node() && node()->isElementNode())
+        toElement(node())->setRegionOversetState(state);
+}
+
 LayoutUnit RenderRegion::pageLogicalTopForOffset(LayoutUnit /* offset */) const
 {
     return flowThread()->isHorizontalWritingMode() ? flowThreadPortionRect().y() : flowThreadPortionRect().x();
 }
 
 bool RenderRegion::isFirstRegion() const
 {
     ASSERT(isValid());
 
     return m_flowThread->firstRegion() == this;
@@ skipping 481 matching lines @@
     if (!hasOverrideHeight())
         return;
 
     LayoutUnit newLogicalHeight = overrideLogicalContentHeight() + borderAndPaddingLogicalHeight();
     ASSERT(newLogicalHeight < LayoutUnit::max() / 2);
     if (newLogicalHeight > logicalHeight())
         setLogicalHeight(newLogicalHeight);
 }
 
 } // namespace WebCore