Expose scroll customization for touch to JS (behind REF).

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 13 matching lines @@
 
 #include "core/animation/ElementAnimations.h"
 #include "core/dom/Attr.h"
 #include "core/dom/DatasetDOMStringMap.h"
 #include "core/dom/NamedNodeMap.h"
 #include "core/dom/NodeRareData.h"
 #include "core/dom/PseudoElement.h"
 #include "core/dom/custom/CustomElementDefinition.h"
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/html/ClassList.h"
+#include "core/page/scrolling/ScrollStateCallback.h"
 #include "core/style/StyleInheritedData.h"
 #include "platform/heap/Handle.h"
 #include "wtf/OwnPtr.h"
 
 namespace blink {
 
 class HTMLElement;
 
 class ElementRareData : public NodeRareData {
 public:
@@ skipping 70 matching lines @@
     uint32_t decrementProxyCount()
     {
         ASSERT(m_proxyCount);
         return --m_proxyCount;
     }
     uint32_t proxyCount() const { return m_proxyCount; }
 
     void setCustomElementDefinition(PassRefPtrWillBeRawPtr<CustomElementDefinition> definition) { m_customElementDefinition = definition; }
     CustomElementDefinition* customElementDefinition() const { return m_customElementDefinition.get(); }
 
+    void setDistributeScroll(PassRefPtrWillBeRawPtr<ScrollStateCallback> scrollStateCallback)
+    {
+        m_distributeScroll = scrollStateCallback;
+    }
+
+    ScrollStateCallback* getDistributeScroll() { return m_distributeScroll.get(); }
+
+    void setApplyScroll(PassRefPtrWillBeRawPtr<ScrollStateCallback> scrollStateCallback)
+    {
+        m_applyScroll = scrollStateCallback;
+    }
+
+    ScrollStateCallback* getApplyScroll() { return m_applyScroll.get(); }
+
     AttrNodeList& ensureAttrNodeList();
     AttrNodeList* attrNodeList() { return m_attrNodeList.get(); }
     void removeAttrNodeList() { m_attrNodeList.clear(); }
 
     DECLARE_TRACE_AFTER_DISPATCH();
 
 private:
     short m_tabindex;
     // As m_proxyCount usually doesn't exceed 10bits (1024), if you want to add some booleans you
     // can steal some bits from m_proxyCount by using bitfields to prevent ElementRareData bloat.
@@ skipping 11 matching lines @@
     OwnPtrWillBeMember<InlineCSSStyleDeclaration> m_cssomWrapper;
 
     RefPtr<ComputedStyle> m_computedStyle;
     RefPtrWillBeMember<CustomElementDefinition> m_customElementDefinition;
 
     RefPtrWillBeMember<PseudoElement> m_generatedBefore;
     RefPtrWillBeMember<PseudoElement> m_generatedAfter;
     RefPtrWillBeMember<PseudoElement> m_generatedFirstLetter;
     RefPtrWillBeMember<PseudoElement> m_backdrop;
 
+    RefPtrWillBeMember<ScrollStateCallback> m_applyScroll;
+    RefPtrWillBeMember<ScrollStateCallback> m_distributeScroll;

[haraken, 2015/06/27 08:09:33]

You can make Oilpan the default for ScrollStateCallback and use
PersistentWillBeMember.

[tdresser, 2015/06/29 20:59:33]

Thanks, I'd tried that earlier, but had been missing the behavior of Persistent.

+
     explicit ElementRareData(LayoutObject*);
 };
 
 inline LayoutSize defaultMinimumSizeForResizing()
 {
     return LayoutSize(LayoutUnit::max(), LayoutUnit::max());
 }
 
 inline ElementRareData::ElementRareData(LayoutObject* layoutObject)
     : NodeRareData(layoutObject)
@@ skipping 68 matching lines @@
     case FIRST_LETTER:
         return m_generatedFirstLetter.get();
     default:
         return 0;
     }
 }
 
 } // namespace
 
 #endif // ElementRareData_h