[SVG] Resources should be laid out in dependecy order.

Source/core/svg/SVGElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) 2009 Cameron McCormack <cam@mcc.id.au>
  *
  * 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 29 matching lines @@
 #include "core/rendering/RenderObject.h"
 #include "core/rendering/svg/RenderSVGResourceContainer.h"
 #include "core/svg/SVGCursorElement.h"
 #include "core/svg/SVGDocumentExtensions.h"
 #include "core/svg/SVGElementInstance.h"
 #include "core/svg/SVGElementRareData.h"
 #include "core/svg/SVGGraphicsElement.h"
 #include "core/svg/SVGSVGElement.h"
 #include "core/svg/SVGUseElement.h"
 
+#include "wtf/TemporaryChange.h"
+
 namespace WebCore {
 
 // Animated property definitions
 DEFINE_ANIMATED_STRING(SVGElement, HTMLNames::classAttr, ClassName, className)
 
 BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGElement)
     REGISTER_LOCAL_ANIMATED_PROPERTY(className)
 END_REGISTER_ANIMATED_PROPERTIES
 
 using namespace HTMLNames;
 using namespace SVGNames;
 
 void mapAttributeToCSSProperty(HashMap<StringImpl*, CSSPropertyID>* propertyNameToIdMap, const QualifiedName& attrName)
 {
     // FIXME: when CSS supports "transform-origin" the special case for transform_originAttr can be removed.
     CSSPropertyID propertyId = cssPropertyID(attrName.localName());
     if (!propertyId && attrName == transform_originAttr)
         propertyId = CSSPropertyWebkitTransformOrigin; // cssPropertyID("-webkit-transform-origin")
     ASSERT(propertyId > 0);
     propertyNameToIdMap->set(attrName.localName().impl(), propertyId);
 }
 
 SVGElement::SVGElement(const QualifiedName& tagName, Document& document, ConstructionType constructionType)
     : Element(tagName, &document, constructionType)
+#if !ASSERT_DISABLED
+    , m_inRelativeLengthClientsInvalidation(false)
+#endif
 {
     ScriptWrappable::init(this);
     registerAnimatedPropertiesForSVGElement();
     setHasCustomStyleCallbacks();
 }
 
 SVGElement::~SVGElement()
 {
     if (!hasSVGRareData())
         ASSERT(!SVGElementRareData::rareDataMap().contains(this));
@@ skipping 360 matching lines @@
 {
     // If we're not yet in a document, this function will be called again from insertedInto(). Do nothing now.
     if (!inDocument())
         return;
 
     // An element wants to notify us that its own relative lengths state changed.
     // Register it in the relative length map, and register us in the parent relative length map.
     // Register the parent in the grandparents map, etc. Repeat procedure until the root of the SVG tree.
     for (ContainerNode* currentNode = this; currentNode && currentNode->isSVGElement(); currentNode = currentNode->parentNode()) {
         SVGElement* currentElement = toSVGElement(currentNode);
+        ASSERT(!currentElement->m_inRelativeLengthClientsInvalidation);
 
         bool hadRelativeLengths = currentElement->hasRelativeLengths();
         if (clientHasRelativeLengths)
             currentElement->m_elementsWithRelativeLengths.add(clientElement);
         else
             currentElement->m_elementsWithRelativeLengths.remove(clientElement);
 
         // If the relative length state hasn't changed, we can stop propagating the notfication.
         if (hadRelativeLengths == currentElement->hasRelativeLengths())
             break;
 
         clientElement = currentElement;
         clientHasRelativeLengths = clientElement->hasRelativeLengths();
     }
 }
 
+void SVGElement::invalidateRelativeLengthClients(SubtreeLayoutScope* layoutScope)
+{
+    if (!inDocument())
+        return;
+
+    ASSERT(!m_inRelativeLengthClientsInvalidation);
+#if !ASSERT_DISABLED
+    TemporaryChange<bool> inRelativeLengthClientsInvalidationChange(m_inRelativeLengthClientsInvalidation, true);
+#endif
+
+    HashSet<SVGElement*>::iterator end = m_elementsWithRelativeLengths.end();
+    for (HashSet<SVGElement*>::iterator it = m_elementsWithRelativeLengths.begin(); it != end; ++it) {
+        if (*it == this)
+            continue;
+
+        if ((*it)->renderer() && (*it)->selfHasRelativeLengths())
+            (*it)->renderer()->setNeedsLayout(MarkContainingBlockChain, layoutScope);
+
+        (*it)->invalidateRelativeLengthClients(layoutScope);
+    }
+}
+
 SVGSVGElement* SVGElement::ownerSVGElement() const
 {
     ContainerNode* n = parentOrShadowHostNode();
     while (n) {
         if (n->hasTagName(SVGNames::svgTag))
             return toSVGSVGElement(n);
 
         n = n->parentOrShadowHostNode();
     }
 
@@ skipping 659 matching lines @@
     }
 
     if (name == classAttr)
         return true;
 
     return animatableAttributes.contains(name);
 }
 #endif
 
 }