[New Multicolumn] Add support for column-span:all

Source/core/rendering/RenderObject.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. 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
@@ skipping 307 matching lines @@
     //////////////////////////////////////////
 private:
 #if ENABLE(ASSERT)
     bool isSetNeedsLayoutForbidden() const { return m_setNeedsLayoutForbidden; }
     void setNeedsLayoutIsForbidden(bool flag) { m_setNeedsLayoutForbidden = flag; }
 #endif
 
     void addAbsoluteRectForLayer(LayoutRect& result);
     bool requiresAnonymousTableWrappers(const RenderObject*) const;
 
+    // This renderer has column-span:all, but is it really a valid column spanner?
+    bool isValidColumnSpanAll() const;
+
     // Gets pseudoStyle from Shadow host(in case of input elements)
     // or from Parent element.
     PassRefPtr<RenderStyle> getUncachedPseudoStyleFromParentOrShadowHost() const;
 
 public:
 #ifndef NDEBUG
     void showTreeForThis() const;
     void showRenderTreeForThis() const;
     void showLineTreeForThis() const;
 
@@ skipping 42 matching lines @@
     virtual bool isRenderBlockFlow() const { return false; }
     virtual bool isRenderButton() const { return false; }
     virtual bool isRenderFlowThread() const { return false; }
     virtual bool isRenderFullScreen() const { return false; }
     virtual bool isRenderFullScreenPlaceholder() const { return false; }
     virtual bool isRenderGrid() const { return false; }
     virtual bool isRenderIFrame() const { return false; }
     virtual bool isRenderImage() const { return false; }
     virtual bool isRenderInline() const { return false; }
     virtual bool isRenderMultiColumnSet() const { return false; }
+    virtual bool isRenderMultiColumnSpannerSet() const { return false; }
     virtual bool isRenderPart() const { return false; }
     virtual bool isRenderRegion() const { return false; }
     virtual bool isRenderScrollbarPart() const { return false; }
     virtual bool isRenderTableCol() const { return false; }
     virtual bool isRenderView() const { return false; }
     virtual bool isReplica() const { return false; }
     virtual bool isRuby() const { return false; }
     virtual bool isRubyBase() const { return false; }
     virtual bool isRubyRun() const { return false; }
     virtual bool isRubyText() const { return false; }
@@ skipping 121 matching lines @@
         return true;
     }
 
     bool isAnonymous() const { return m_bitfields.isAnonymous(); }
     bool isAnonymousBlock() const
     {
         // This function is kept in sync with anonymous block creation conditions in
         // RenderBlock::createAnonymousBlock(). This includes creating an anonymous
         // RenderBlock having a BLOCK or BOX display. Other classes such as RenderTextFragment
         // are not RenderBlocks and will return false. See https://bugs.webkit.org/show_bug.cgi?id=56709.
-        return isAnonymous() && (style()->display() == BLOCK || style()->display() == BOX) && style()->styleType() == NOPSEUDO && isRenderBlock() && !isListMarker() && !isRenderFlowThread()
+        return isAnonymous() && (style()->display() == BLOCK || style()->display() == BOX) && style()->styleType() == NOPSEUDO && isRenderBlock() && !isListMarker() && !isRenderFlowThread() && !isRenderMultiColumnSet()
             && !isRenderFullScreen()
             && !isRenderFullScreenPlaceholder();
     }
     bool isAnonymousColumnsBlock() const { return style()->specifiesColumns() && isAnonymousBlock(); }
     bool isAnonymousColumnSpanBlock() const { return style()->columnSpan() && isAnonymousBlock(); }
     bool isElementContinuation() const { return node() && node()->renderer() != this; }
     bool isInlineElementContinuation() const { return isElementContinuation() && isInline(); }
     virtual RenderBoxModelObject* virtualContinuation() const { return 0; }
 
     bool isFloating() const { return m_bitfields.floating(); }
@@ skipping 101 matching lines @@
     void clearNode() { m_node = nullptr; }
 
     // Returns the styled node that caused the generation of this renderer.
     // This is the same as node() except for renderers of :before and :after
     // pseudo elements for which their parent node is returned.
     Node* generatingNode() const { return isPseudoElement() ? node()->parentOrShadowHostNode() : node(); }
 
     Document& document() const { return m_node->document(); }
     LocalFrame* frame() const { return document().frame(); }
 
+    bool isColumnSpanAll() const { return style()->columnSpan() == ColumnSpanAll && isValidColumnSpanAll(); }
+
     // Returns the object containing this one. Can be different from parent for positioned elements.
     // If paintInvalidationContainer and paintInvalidationContainerSkipped are not null, on return *paintInvalidationContainerSkipped
     // is true if the renderer returned is an ancestor of paintInvalidationContainer.
     RenderObject* container(const RenderLayerModelObject* paintInvalidationContainer = 0, bool* paintInvalidationContainerSkipped = 0) const;
     RenderBlock* containerForFixedPosition(const RenderLayerModelObject* paintInvalidationContainer = 0, bool* paintInvalidationContainerSkipped = 0) const;
 
     virtual RenderObject* hoverAncestor() const { return parent(); }
 
     Element* offsetParent() const;
 
@@ skipping 911 matching lines @@
 void showTree(const blink::RenderObject*);
 void showLineTree(const blink::RenderObject*);
 void showRenderTree(const blink::RenderObject* object1);
 // We don't make object2 an optional parameter so that showRenderTree
 // can be called from gdb easily.
 void showRenderTree(const blink::RenderObject* object1, const blink::RenderObject* object2);
 
 #endif
 
 #endif // RenderObject_h