LayoutObject::paintingLayer() to correctly handle column-span:all

third_party/WebKit/Source/core/layout/LayoutObject.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 251 matching lines @@
     LayoutObject* nextInPreOrder() const;
     LayoutObject* nextInPreOrder(const LayoutObject* stayWithin) const;
     LayoutObject* nextInPreOrderAfterChildren() const;
     LayoutObject* nextInPreOrderAfterChildren(const LayoutObject* stayWithin) const;
     LayoutObject* previousInPreOrder() const;
     LayoutObject* previousInPreOrder(const LayoutObject* stayWithin) const;
     LayoutObject* childAt(unsigned) const;
 
     LayoutObject* lastLeafChild() const;
 
-    // The following six functions are used when the layout tree hierarchy changes to make sure layers get
+    // The following functions are used when the layout tree hierarchy changes to make sure layers get
     // properly added and removed.  Since containership can be implemented by any subclass, and since a hierarchy
     // can contain a mixture of boxes and other object types, these functions need to be in the base class.
     PaintLayer* enclosingLayer() const;
     void addLayers(PaintLayer* parentLayer);
     void removeLayers(PaintLayer* parentLayer);
     void moveLayers(PaintLayer* oldParent, PaintLayer* newParent);
     PaintLayer* findNextLayer(PaintLayer* parentLayer, LayoutObject* startPoint, bool checkParent = true);
 
+    // Returns the layer that will paint this object.
+    // If possible, use the faster PaintInvalidationState::paintingLayer() instead.
+    PaintLayer* paintingLayer() const;
+
     // Scrolling is a LayoutBox concept, however some code just cares about recursively scrolling our enclosing ScrollableArea(s).
     bool scrollRectToVisible(
         const LayoutRect&,
         const ScrollAlignment& alignX = ScrollAlignment::alignCenterIfNeeded,
         const ScrollAlignment& alignY = ScrollAlignment::alignCenterIfNeeded,
         ScrollType = ProgrammaticScroll,
         bool makeVisibleInVisualViewport = true);
 
     // Convenience function for getting to the nearest enclosing box of a LayoutObject.
     LayoutBox* enclosingBox() const;
@@ skipping 1259 matching lines @@
 
     // This function generates the invalidation for this object only.
     // It doesn't recurse into other object, as this is handled
     // by invalidatePaintOfSubtreesIfNeeded.
     virtual PaintInvalidationReason invalidatePaintIfNeeded(const PaintInvalidationState&);
 
     // When this object is invalidated for paint, this method is called to invalidate any DisplayItemClients
     // owned by this object, including the object itself, LayoutText/LayoutInline line boxes, etc.,
     // not including children which will be invalidated normally during invalidateTreeIfNeeded() and
     // parts which are invalidated separately (e.g. scrollbars).
-    // The caller should ensure the enclosing layer has been setNeedsRepaint before calling this function.
+    // The caller should ensure the painting layer has been setNeedsRepaint before calling this function.
     virtual void invalidateDisplayItemClients(const LayoutBoxModelObject& paintInvalidationContainer, PaintInvalidationReason) const;
 
+    // If possible, use the faster paintInvalidationState.paintingLayer().setNeedsRepaint().
+    void setPaintingLayerNeedsRepaint() const;
+
     // Sets enclosing layer needsRepaint, then calls invalidateDisplayItemClients().
     // Should use this version when PaintInvalidationState is available.
     void invalidateDisplayItemClientsWithPaintInvalidationState(const LayoutBoxModelObject& paintInvalidationContainer, const PaintInvalidationState&, PaintInvalidationReason) const;
 
     void setIsBackgroundAttachmentFixedObject(bool);
 
     void clearSelfNeedsOverflowRecalcAfterStyleChange() { m_bitfields.setSelfNeedsOverflowRecalcAfterStyleChange(false); }
     void setShouldInvalidateOverflowForPaint() { m_bitfields.setShouldInvalidateOverflowForPaint(true); }
     void setEverHadLayout() { m_bitfields.setEverHadLayout(true); }
 
@@ skipping 36 matching lines @@
     inline void markAncestorsForOverflowRecalcIfNeeded();
 
     inline void markAncestorsForPaintInvalidation();
 
     inline void invalidateSelectionIfNeeded(const LayoutBoxModelObject& paintInvalidationContainer, const PaintInvalidationState&, PaintInvalidationReason);
 
     inline void invalidateContainerPreferredLogicalWidths();
 
     void invalidatePaintIncludingNonSelfPaintingLayerDescendantsInternal(const LayoutBoxModelObject& paintInvalidationContainer);
 
-    // The caller should ensure the enclosing layer has been setNeedsRepaint before calling this function.
+    // The caller should ensure the painting layer has been setNeedsRepaint before calling this function.
     void invalidatePaintOfPreviousPaintInvalidationRect(const LayoutBoxModelObject& paintInvalidationContainer, PaintInvalidationReason);
 
     LayoutRect previousSelectionRectForPaintInvalidation() const;
     void setPreviousSelectionRectForPaintInvalidation(const LayoutRect&);
 
     LayoutObject* containerForAbsolutePosition(const LayoutBoxModelObject* ancestor = nullptr, bool* ancestorSkipped = nullptr, bool* filterOrReflectionSkipped = nullptr) const;
 
     const LayoutBoxModelObject* enclosingCompositedContainer() const;
 
     LayoutFlowThread* locateFlowThreadContainingBlock() const;
@@ skipping 542 matching lines @@
 void showTree(const blink::LayoutObject*);
 void showLineTree(const blink::LayoutObject*);
 void showLayoutTree(const blink::LayoutObject* object1);
 // We don't make object2 an optional parameter so that showLayoutTree
 // can be called from gdb easily.
 void showLayoutTree(const blink::LayoutObject* object1, const blink::LayoutObject* object2);
 
 #endif
 
 #endif // LayoutObject_h