Initial ResizeObserver implementation

third_party/WebKit/Source/core/dom/ElementRareData.h

 /*
  * Copyright (C) 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 David Smith <catfish.man@gmail.com>
  *
  * 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,
@@ skipping 26 matching lines @@
 #include "core/html/ClassList.h"
 #include "core/style/StyleInheritedData.h"
 #include "platform/heap/Handle.h"
 #include "wtf/HashSet.h"
 #include <memory>
 
 namespace blink {
 
 class HTMLElement;
 class CompositorProxiedPropertySet;
+class ResizeObservation;
+class ResizeObserver;
 
 class ElementRareData : public NodeRareData {
 public:
     static ElementRareData* create(LayoutObject* layoutObject)
     {
         return new ElementRareData(layoutObject);
     }
 
     ~ElementRareData();
 
@@ skipping 74 matching lines @@
     void removeAttrNodeList() { m_attrNodeList.clear(); }
 
     NodeIntersectionObserverData* intersectionObserverData() const { return m_intersectionObserverData.get(); }
     NodeIntersectionObserverData& ensureIntersectionObserverData()
     {
         if (!m_intersectionObserverData)
             m_intersectionObserverData = new NodeIntersectionObserverData();
         return *m_intersectionObserverData;
     }
 
+    using ResizeObserverDataMap = HeapHashMap<Member<ResizeObserver>, Member<ResizeObservation>>;
+
+    ResizeObserverDataMap* resizeObserverData() const { return m_resizeObserverData; }
+    ResizeObserverDataMap& ensureResizeObserverData();
+
     DECLARE_TRACE_AFTER_DISPATCH();
 
     DECLARE_TRACE_WRAPPERS_AFTER_DISPATCH();
 
 private:
     CompositorProxiedPropertySet& ensureCompositorProxiedPropertySet();
     void clearCompositorProxiedPropertySet() { m_proxiedProperties = nullptr; }
 
     short m_tabindex;
 
     LayoutSize m_minimumSizeForResizing;
     IntSize m_savedLayerScrollOffset;
 
     Member<DatasetDOMStringMap> m_dataset;
     Member<ElementShadow> m_shadow;
     Member<ClassList> m_classList;
     Member<NamedNodeMap> m_attributeMap;
     Member<AttrNodeList> m_attrNodeList;
     Member<InlineCSSStyleDeclaration> m_cssomWrapper;
     Member<InlineStylePropertyMap> m_cssomMapWrapper;
     std::unique_ptr<CompositorProxiedPropertySet> m_proxiedProperties;
 
     Member<ElementAnimations> m_elementAnimations;
     Member<NodeIntersectionObserverData> m_intersectionObserverData;
+    Member<ResizeObserverDataMap> m_resizeObserverData;
 
     RefPtr<ComputedStyle> m_computedStyle;
     Member<V0CustomElementDefinition> m_customElementDefinition;
 
     Member<PseudoElementData> m_pseudoElementData;
 
     explicit ElementRareData(LayoutObject*);
 };
 
 inline LayoutSize defaultMinimumSizeForResizing()
@@ skipping 57 matching lines @@
 inline CompositorProxiedPropertySet& ElementRareData::ensureCompositorProxiedPropertySet()
 {
     if (!m_proxiedProperties)
         m_proxiedProperties = CompositorProxiedPropertySet::create();
     return *m_proxiedProperties;
 }
 
 } // namespace blink
 
 #endif // ElementRareData_h