[New Multicolumn] Layout support for column-span:all.

Source/core/rendering/RenderBlock.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 1479 matching lines @@
     }
 
     addVisualEffectOverflow();
 
     addVisualOverflowFromTheme();
 }
 
 void RenderBlock::addOverflowFromBlockChildren()
 {
     for (RenderBox* child = firstChildBox(); child; child = child->nextSiblingBox()) {
-        if (!child->isFloatingOrOutOfFlowPositioned())
+        if (!child->isFloatingOrOutOfFlowPositioned() && !child->isColumnSpanAll())
             addOverflowFromChild(child);
     }
 }
 
 void RenderBlock::addOverflowFromPositionedObjects()
 {
     TrackedRendererListHashSet* positionedDescendants = positionedObjects();
     if (!positionedDescendants)
         return;
 
@@ skipping 15 matching lines @@
 
     IntRect inflatedRect = pixelSnappedBorderBoxRect();
     RenderTheme::theme().adjustPaintInvalidationRect(this, inflatedRect);
     addVisualOverflow(inflatedRect);
 }
 
 bool RenderBlock::createsNewFormattingContext() const
 {
     return isInlineBlockOrInlineTable() || isFloatingOrOutOfFlowPositioned() || hasOverflowClip() || isFlexItemIncludingDeprecated()
         || style()->specifiesColumns() || isRenderFlowThread() || isTableCell() || isTableCaption() || isFieldset() || isWritingModeRoot()
-        || isDocumentElement() || style()->columnSpan() || isGridItem();
+        || isDocumentElement() || (document().regionBasedColumnsEnabled() ? isColumnSpanAll() : style()->columnSpan()) || isGridItem();
 }
 
 void RenderBlock::updateBlockChildDirtyBitsBeforeLayout(bool relayoutChildren, RenderBox& child)
 {
     // FIXME: Technically percentage height objects only need a relayout if their percentage isn't going to be turned into
     // an auto value. Add a method to determine this, so that we can avoid the relayout.
     bool hasRelativeLogicalHeight = child.hasRelativeLogicalHeight() || (child.isAnonymous() && this->hasRelativeLogicalHeight());
     if (relayoutChildren || (hasRelativeLogicalHeight && !isRenderView()))
         child.setChildNeedsLayout(MarkOnlyThis);
 
@@ skipping 811 matching lines @@
         // We have to hit-test our line boxes.
         if (m_lineBoxes.hitTest(this, request, result, locationInContainer, accumulatedOffset, hitTestAction))
             return true;
     } else {
         // Hit test our children.
         HitTestAction childHitTest = hitTestAction;
         if (hitTestAction == HitTestChildBlockBackgrounds)
             childHitTest = HitTestChildBlockBackground;
         for (RenderBox* child = lastChildBox(); child; child = child->previousSiblingBox()) {
             LayoutPoint childPoint = flipForWritingModeForChild(child, accumulatedOffset);
-            if (!child->hasSelfPaintingLayer() && !child->isFloating() && child->nodeAtPoint(request, result, locationInContainer, childPoint, childHitTest))
+            if (!child->hasSelfPaintingLayer() && !child->isFloating() && !child->isColumnSpanAll() && child->nodeAtPoint(request, result, locationInContainer, childPoint, childHitTest))
                 return true;
         }
     }
 
     return false;
 }
 
 Position RenderBlock::positionForBox(InlineBox *box, bool start) const
 {
     if (!box)
@@ skipping 1531 matching lines @@
 void RenderBlock::showLineTreeAndMark(const InlineBox* markedBox1, const char* markedLabel1, const InlineBox* markedBox2, const char* markedLabel2, const RenderObject* obj) const
 {
     showRenderObject();
     for (const RootInlineBox* root = firstRootBox(); root; root = root->nextRootBox())
         root->showLineTreeAndMark(markedBox1, markedLabel1, markedBox2, markedLabel2, obj, 1);
 }
 
 #endif
 
 } // namespace blink