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