Tracking filter mutation via SVGElementProxy

third_party/WebKit/Source/core/layout/svg/LayoutSVGResourceContainer.h

 /*
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef LayoutSVGResourceContainer_h
 #define LayoutSVGResourceContainer_h
 
 #include "core/layout/svg/LayoutSVGHiddenContainer.h"
 #include "core/svg/SVGDocumentExtensions.h"
-#include "core/svg/SVGResourceClient.h"
-#include "platform/heap/Handle.h"
 
 namespace blink {
 
+class SVGElementProxyTracker;
+
 enum LayoutSVGResourceType {
   MaskerResourceType,
   MarkerResourceType,
   PatternResourceType,
   LinearGradientResourceType,
   RadialGradientResourceType,
   FilterResourceType,
   ClipperResourceType
 };
 
-class PaintLayer;
-
 class LayoutSVGResourceContainer : public LayoutSVGHiddenContainer {
  public:
   explicit LayoutSVGResourceContainer(SVGElement*);
   ~LayoutSVGResourceContainer() override;
 
   virtual void removeAllClientsFromCache(bool markForInvalidation = true) = 0;
   virtual void removeClientFromCache(LayoutObject*,
                                      bool markForInvalidation = true) = 0;
 
   void layout() override;
   void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) final;
   bool isOfType(LayoutObjectType type) const override {
     return type == LayoutObjectSVGResourceContainer ||
            LayoutSVGHiddenContainer::isOfType(type);
   }
 
   virtual LayoutSVGResourceType resourceType() const = 0;
 
   bool isSVGPaintServer() const {
     LayoutSVGResourceType resourceType = this->resourceType();
     return resourceType == PatternResourceType ||
            resourceType == LinearGradientResourceType ||
            resourceType == RadialGradientResourceType;
   }
 
   void idChanged();
-  void addResourceClient(SVGResourceClient*);
-  void removeResourceClient(SVGResourceClient*);
 
   void invalidateCacheAndMarkForLayout(SubtreeLayoutScope* = nullptr);
 
   static void markForLayoutAndParentResourceInvalidation(
       LayoutObject*,
       bool needsLayout = true);
 
   void clearInvalidationMask() { m_invalidationMask = 0; }
 
  protected:
   // When adding modes, make sure we don't overflow m_invalidationMask below.
   enum InvalidationMode {
     LayoutAndBoundariesInvalidation = 1 << 0,
     BoundariesInvalidation = 1 << 1,
     PaintInvalidation = 1 << 2,
     ParentOnlyInvalidation = 1 << 3
   };
 
   // Used from the invalidateClient/invalidateClients methods from classes,
   // inheriting from us.
   void markAllClientsForInvalidation(InvalidationMode);
-  void markAllResourceClientsForInvalidation();
   void markClientForInvalidation(LayoutObject*, InvalidationMode);
 
+  void invalidateProxyClients(InvalidationMode);

[pdr., 2016/10/20 03:11:05]

Is InvalidationMode needed (yet)?

[fs, 2016/10/20 11:28:00]

No. Dropped (for now.)

+  void invalidateProxies();
+  virtual SVGElementProxyTracker* elementProxyTracker() { return nullptr; }
+
   void willBeDestroyed() override;
 
   bool m_isInLayout;
 
  private:
   friend class SVGResourcesCache;
   void addClient(LayoutObject*);
   void removeClient(LayoutObject*);
   void detachAllClients();
 
   void registerResource();
 
   AtomicString m_id;
   // Track global (markAllClientsForInvalidation) invals to avoid redundant
   // crawls.
   unsigned m_invalidationMask : 8;
 
   unsigned m_registered : 1;
   unsigned m_isInvalidating : 1;
   // 22 padding bits available
 
   HashSet<LayoutObject*> m_clients;
-  PersistentHeapHashSet<WeakMember<SVGResourceClient>> m_resourceClients;
 };
 
 inline LayoutSVGResourceContainer* getLayoutSVGResourceContainerById(
     TreeScope& treeScope,
     const AtomicString& id) {
   if (id.isEmpty())
     return nullptr;
 
   if (LayoutSVGResourceContainer* layoutResource =
           treeScope.document().accessSVGExtensions().resourceById(id))
@@ skipping 16 matching lines @@
                                 isSVGResourceContainer());
 
 #define DEFINE_LAYOUT_SVG_RESOURCE_TYPE_CASTS(thisType, typeName)   \
   DEFINE_TYPE_CASTS(thisType, LayoutSVGResourceContainer, resource, \
                     resource->resourceType() == typeName,           \
                     resource.resourceType() == typeName)
 
 }  // namespace blink
 
 #endif