First version of the SOurce SDK 2013

2013-06-26 15:22:04 -07:00
commit 39ed87570b
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================
+
+#ifndef DMELEMENTFACTORYHELPER_H
+#define DMELEMENTFACTORYHELPER_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "datamodel/idatamodel.h"
+#include "datamodel/dmelement.h"
+#include "datamodel/dmattribute.h"
+#include "datamodel/dmattributevar.h"
+#include "tier1/utlvector.h"
+#include "tier1/utlsymbol.h"
+
+
+//-----------------------------------------------------------------------------
+// Internal interface for IDmElementFactory
+//-----------------------------------------------------------------------------
+class IDmElementFactoryInternal : public IDmElementFactory
+{
+public:
+	virtual void SetElementTypeSymbol( CUtlSymbol sym ) = 0;
+	virtual bool IsAbstract() const = 0;
+};
+
+
+//-----------------------------------------------------------------------------
+// Class used to register factories into a global list
+//-----------------------------------------------------------------------------
+class CDmElementFactoryHelper
+{
+public:
+	// Static list of helpers
+	static CDmElementFactoryHelper *s_pHelpers[2];
+
+	// Create all the hud elements
+	static void InstallFactories( );
+
+public:
+	// Construction
+	CDmElementFactoryHelper( const char *pClassName, IDmElementFactoryInternal *pFactory, bool bIsStandardFactory );
+
+	// Accessors
+	CDmElementFactoryHelper *GetNext( void );
+
+	const char *GetClassname();
+	IDmElementFactoryInternal *GetFactory();
+
+private:
+	// Next factory in list
+	CDmElementFactoryHelper	*m_pNext;
+	// Creation function to use for this technology
+	IDmElementFactoryInternal *m_pFactory;
+	const char				*m_pszClassname;
+};
+
+
+//-----------------------------------------------------------------------------
+// Inline methods 
+//-----------------------------------------------------------------------------
+inline const char *CDmElementFactoryHelper::GetClassname() 
+{ 
+	return m_pszClassname; 
+}
+
+inline IDmElementFactoryInternal *CDmElementFactoryHelper::GetFactory() 
+{ 
+	return m_pFactory; 
+}
+
+
+//-----------------------------------------------------------------------------
+// Helper Template factory for simple creation of factories
+//-----------------------------------------------------------------------------
+template <class T >
+class CDmElementFactory : public IDmElementFactoryInternal
+{
+public:
+	CDmElementFactory( const char *pLookupName ) : m_pLookupName( pLookupName ) {}
+
+	// Creation, destruction
+	virtual CDmElement* Create( DmElementHandle_t handle, const char *pElementType, const char *pElementName, DmFileId_t fileid, const DmObjectId_t &id )
+	{
+		return new T( handle, m_pLookupName, id, pElementName, fileid );
+	}
+
+	virtual void Destroy( DmElementHandle_t hElement )
+	{
+		CDmElement *pElement = g_pDataModel->GetElement( hElement );
+		if ( pElement )
+		{
+			T *pActualElement = static_cast< T* >( pElement );
+			delete pActualElement;
+		}
+	}
+
+	// Sets the type symbol, used for "isa" implementation
+	virtual void SetElementTypeSymbol( CUtlSymbol sym )
+	{
+		T::SetTypeSymbol( sym );
+	}
+
+	virtual bool IsAbstract() const { return false; }
+
+private:
+	const char *m_pLookupName;
+};
+
+
+template < class T >
+class CDmAbstractElementFactory : public IDmElementFactoryInternal
+{
+public:
+	CDmAbstractElementFactory() {}
+
+	// Creation, destruction
+	virtual CDmElement* Create( DmElementHandle_t handle, const char *pElementType, const char *pElementName, DmFileId_t fileid, const DmObjectId_t &id )
+	{
+		return NULL;
+	}
+
+	virtual void Destroy( DmElementHandle_t hElement )
+	{
+	}
+
+	// Sets the type symbol, used for "isa" implementation
+	virtual void SetElementTypeSymbol( CUtlSymbol sym )
+	{
+		T::SetTypeSymbol( sym );
+	}
+
+	virtual bool IsAbstract() const { return true; }
+
+private:
+};
+
+
+//-----------------------------------------------------------------------------
+// Helper macro to create the class factory 
+//-----------------------------------------------------------------------------
+#if defined( MOVIEOBJECTS_LIB ) || defined ( DATAMODEL_LIB ) || defined ( DMECONTROLS_LIB )
+
+#define IMPLEMENT_ELEMENT_FACTORY( lookupName, className )	\
+	IMPLEMENT_ELEMENT( className )							\
+	CDmElementFactory< className > g_##className##_Factory( #lookupName );							\
+	CDmElementFactoryHelper g_##className##_Helper( #lookupName, &g_##className##_Factory, true );	\
+	className *g_##className##LinkerHack = NULL;
+
+#define IMPLEMENT_ABSTRACT_ELEMENT( lookupName, className )	\
+	IMPLEMENT_ELEMENT( className )							\
+	CDmAbstractElementFactory< className > g_##className##_Factory;									\
+	CDmElementFactoryHelper g_##className##_Helper( #lookupName, &g_##className##_Factory, true );	\
+	className *g_##className##LinkerHack = NULL;
+
+#else
+
+#define IMPLEMENT_ELEMENT_FACTORY( lookupName, className )	\
+	IMPLEMENT_ELEMENT( className )							\
+	CDmElementFactory< className > g_##className##_Factory( #lookupName );						\
+	CDmElementFactoryHelper g_##className##_Helper( #lookupName, &g_##className##_Factory, false );	\
+	className *g_##className##LinkerHack = NULL;
+
+#define IMPLEMENT_ABSTRACT_ELEMENT( lookupName, className )	\
+	IMPLEMENT_ELEMENT( className )							\
+	CDmAbstractElementFactory< className > g_##className##_Factory;									\
+	CDmElementFactoryHelper g_##className##_Helper( #lookupName, &g_##className##_Factory, false );	\
+	className *g_##className##LinkerHack = NULL;
+
+#endif
+
+
+// Used by classes defined in movieobjects or scenedatabase that must be explicitly installed
+#define IMPLEMENT_ELEMENT_FACTORY_INSTALL_EXPLICITLY( lookupName, className )	\
+	IMPLEMENT_ELEMENT( className )							\
+	CDmElementFactory< className > g_##className##_Factory( #lookupName );						\
+	CDmElementFactoryHelper g_##className##_Helper( #lookupName, &g_##className##_Factory, false );	\
+	className *g_##className##LinkerHack = NULL;
+
+//-----------------------------------------------------------------------------
+// Installs dm element factories
+//-----------------------------------------------------------------------------
+void InstallDmElementFactories( );
+
+
+#endif // DMELEMENTFACTORYHELPER_H