Introduce VisiblePositionTemplate template class

Source/core/editing/VisiblePosition.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Portions Copyright (c) 2011 Motorola Mobility, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 31 matching lines @@
 #include "wtf/text/CString.h"
 
 #ifndef NDEBUG
 #include <stdio.h>
 #endif
 
 namespace blink {
 
 using namespace HTMLNames;
 
-VisiblePosition::VisiblePosition()
+template <typename Strategy>
+VisiblePositionTemplate<Strategy>::VisiblePositionTemplate()
 {
 }
 
-VisiblePosition::VisiblePosition(const PositionWithAffinity& positionWithAffinity)
+template <typename Strategy>
+VisiblePositionTemplate<Strategy>::VisiblePositionTemplate(const PositionWithAffinityTemplate<Strategy>& positionWithAffinity)
     : m_positionWithAffinity(positionWithAffinity)
 {
 }
 
-VisiblePosition VisiblePosition::createWithoutCanonicalization(const PositionWithAffinity& canonicalized)
+template <typename Strategy>
+VisiblePositionTemplate<Strategy> VisiblePositionTemplate<Strategy>::createWithoutCanonicalization(const PositionWithAffinityTemplate<Strategy>& canonicalized)
 {
-    return VisiblePosition(canonicalized);
+    return VisiblePositionTemplate<Strategy>(canonicalized);
 }
 
 template<typename Strategy>
 static PositionWithAffinityTemplate<Strategy> createVisiblePositionAlgorithm(const PositionAlgorithm<Strategy>& position, TextAffinity affinity)
 {
     const PositionAlgorithm<Strategy> deepPosition = canonicalPositionOf(position);
     if (deepPosition.isNull())
         return PositionWithAffinityTemplate<Strategy>();
     if (affinity == TextAffinity::Downstream)
         return PositionWithAffinityTemplate<Strategy>(deepPosition);
@@ skipping 16 matching lines @@
 }
 
 VisiblePosition createVisiblePosition(const PositionInComposedTree& position, TextAffinity affinity)
 {
     PositionInComposedTreeWithAffinity canonicalized = createVisiblePositionAlgorithm<EditingInComposedTreeStrategy>(position, affinity);
     return VisiblePosition::createWithoutCanonicalization(PositionWithAffinity(toPositionInDOMTree(canonicalized.position()), canonicalized.affinity()));
 }
 
 #ifndef NDEBUG
 
-void VisiblePosition::debugPosition(const char* msg) const
+template<typename Strategy>
+void VisiblePositionTemplate<Strategy>::debugPosition(const char* msg) const
 {
     if (isNull()) {
         fprintf(stderr, "Position [%s]: null\n", msg);
         return;
     }
     deepEquivalent().debugPosition(msg);
 }
 
-void VisiblePosition::formatForDebugger(char* buffer, unsigned length) const
+template<typename Strategy>
+void VisiblePositionTemplate<Strategy>::formatForDebugger(char* buffer, unsigned length) const
 {
     deepEquivalent().formatForDebugger(buffer, length);
 }
 
-void VisiblePosition::showTreeForThis() const
+template<typename Strategy>
+void VisiblePositionTemplate<Strategy>::showTreeForThis() const
 {
     deepEquivalent().showTreeForThis();
 }
 
 #endif
 
-DEFINE_TRACE(VisiblePosition)
-{
-    visitor->trace(m_positionWithAffinity);
-}
+template class CORE_TEMPLATE_EXPORT VisiblePositionTemplate<EditingStrategy>;
 
 } // namespace blink
 
 #ifndef NDEBUG
 
 void showTree(const blink::VisiblePosition* vpos)
 {
     if (vpos)
         vpos->showTreeForThis();
     else
         fprintf(stderr, "Cannot showTree for (nil) VisiblePosition.\n");
 }
 
 void showTree(const blink::VisiblePosition& vpos)
 {
     vpos.showTreeForThis();
 }
 
 #endif