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618 lines
23 KiB
618 lines
23 KiB
//========= 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 DMELEMENT_H
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#define DMELEMENT_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include "tier1/utlmap.h"
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#include "tier1/utlhash.h"
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#include "tier1/utlvector.h"
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#include "tier1/utlsymbol.h"
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#include "datamodel/attributeflags.h"
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#include "datamodel/idatamodel.h"
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#include "datamodel/dmvar.h"
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//-----------------------------------------------------------------------------
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//
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//-----------------------------------------------------------------------------
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typedef bool (CDmElement::*pfnCommandMethod)( const char *command, const char *args );
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// element/element array traversal path item - assumes the full path does NOT contain cycles
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struct ElementPathItem_t
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{
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ElementPathItem_t( DmElementHandle_t hElem = DMELEMENT_HANDLE_INVALID,
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DmAttributeHandle_t hAttr = DMATTRIBUTE_HANDLE_INVALID,
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int idx = -1 )
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: hElement( hElem ), hAttribute( hAttr ), nIndex( idx )
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{
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}
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// only uses hElement so that it can be used to search for elements
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bool operator==( const ElementPathItem_t &that ) const
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{
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return hElement == that.hElement;
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}
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DmElementHandle_t hElement;
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DmAttributeHandle_t hAttribute;
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int nIndex;
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};
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//-----------------------------------------------------------------------------
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// singly-linked attribute list
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//-----------------------------------------------------------------------------
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struct DmAttributeList_t
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{
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DmAttributeList_t() : m_hAttribute( DMATTRIBUTE_HANDLE_INVALID ), m_pNext( NULL ) {}
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DmAttributeHandle_t m_hAttribute;
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DmAttributeList_t *m_pNext;
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};
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//-----------------------------------------------------------------------------
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// helper class to allow CDmeHandle access to g_pDataModelImp
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//-----------------------------------------------------------------------------
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class CDmeElementRefHelper
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{
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protected:
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void Ref ( DmElementHandle_t hElement, bool bStrong );
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void Unref( DmElementHandle_t hElement, bool bStrong );
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};
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//-----------------------------------------------------------------------------
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// element reference struct - containing attribute referrers and handle refcount
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//-----------------------------------------------------------------------------
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struct DmElementReference_t
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{
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explicit DmElementReference_t( DmElementHandle_t hElement = DMELEMENT_HANDLE_INVALID ) :
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m_hElement( hElement ), m_nWeakHandleCount( 0 ), m_nStrongHandleCount( 0 )
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{
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}
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DmElementReference_t( const DmElementReference_t &that ) :
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m_hElement( that.m_hElement ), m_nWeakHandleCount( that.m_nWeakHandleCount ),
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m_nStrongHandleCount( that.m_nStrongHandleCount ), m_attributes( that.m_attributes )
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{
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}
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DmElementReference_t &operator=( const DmElementReference_t &that )
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{
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m_hElement = that.m_hElement;
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m_nWeakHandleCount = that.m_nWeakHandleCount;
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m_nStrongHandleCount = that.m_nStrongHandleCount;
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m_attributes.m_hAttribute = that.m_attributes.m_hAttribute;
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m_attributes.m_pNext = that.m_attributes.m_pNext;
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return *this;
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}
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~DmElementReference_t()
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{
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// Assert( !IsStronglyReferenced() );
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}
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void AddAttribute( CDmAttribute *pAttribute );
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void RemoveAttribute( CDmAttribute *pAttribute );
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bool IsStronglyReferenced() // should this element be kept around (even if it's DmElementHandle_t is invalidated)
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{
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return m_attributes.m_hAttribute != DMATTRIBUTE_HANDLE_INVALID || m_nStrongHandleCount > 0;
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}
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bool IsWeaklyReferenced() // should we keep this element's DmElementHandle_t mapped to it's id (even if the element is deleted)
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{
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return IsStronglyReferenced() || m_nWeakHandleCount > 0;
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}
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int EstimateMemoryOverhead()
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{
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int nBytes = 0;
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for ( DmAttributeList_t *pLink = m_attributes.m_pNext; pLink; pLink = pLink->m_pNext )
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{
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nBytes += sizeof( DmAttributeList_t );
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}
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return nBytes;
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}
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DmElementHandle_t m_hElement;
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unsigned short m_nWeakHandleCount; // CDmeHandle<T> - for auto-hookup once the element comes back, mainly used by UI
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unsigned short m_nStrongHandleCount; // CDmeCountedElementRef - for preventing elements from being truly deleted, mainly used by undo and file root
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DmAttributeList_t m_attributes;
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};
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//-----------------------------------------------------------------------------
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// Base DmElement we inherit from in higher-level classes
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//-----------------------------------------------------------------------------
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class CDmElement
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{
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public:
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// Can be overridden by derived classes
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virtual void OnAttributeChanged( CDmAttribute *pAttribute ) {}
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virtual void PreAttributeChanged( CDmAttribute *pAttribute ) {}
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virtual void OnAttributeArrayElementAdded( CDmAttribute *pAttribute, int nFirstElem, int nLastElem ) {}
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virtual void OnAttributeArrayElementRemoved( CDmAttribute *pAttribute, int nFirstElem, int nLastElem ) {}
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virtual void Resolve() {}
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virtual bool IsA( UtlSymId_t typeSymbol ) const;
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virtual int GetInheritanceDepth( UtlSymId_t typeSymbol ) const;
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virtual void OnElementUnserialized() {}
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virtual int AllocatedSize() const { return sizeof( CDmElement ); }
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// Returns the element handle
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DmElementHandle_t GetHandle() const;
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// Attribute iteration, finding
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// NOTE: Passing a type into GetAttribute will return NULL if the attribute exists but isn't that type
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bool HasAttribute( const char *pAttributeName, DmAttributeType_t type = AT_UNKNOWN ) const;
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CDmAttribute *GetAttribute( const char *pAttributeName, DmAttributeType_t type = AT_UNKNOWN );
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const CDmAttribute *GetAttribute( const char *pAttributeName, DmAttributeType_t type = AT_UNKNOWN ) const;
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int AttributeCount() const;
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CDmAttribute* FirstAttribute();
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const CDmAttribute* FirstAttribute() const;
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// Element name, type, ID
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// WARNING: SetType() should only be used by format conversion methods (dmxconvert)
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UtlSymId_t GetType() const;
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const char * GetTypeString() const;
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const char * GetName() const;
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const DmObjectId_t& GetId() const;
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void SetType( const char *pType );
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void SetName( const char* pName );
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// Attribute management
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CDmAttribute * AddAttribute( const char *pAttributeName, DmAttributeType_t type );
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template< class E > CDmAttribute* AddAttributeElement( const char *pAttributeName );
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template< class E > CDmAttribute* AddAttributeElementArray( const char *pAttributeName );
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void RemoveAttribute( const char *pAttributeName );
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void RemoveAttributeByPtr( CDmAttribute *pAttributeName );
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void RenameAttribute( const char *pAttributeName, const char *pNewName );
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// get attribute value
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template< class T > const T& GetValue( const char *pAttributeName ) const;
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template< class T > const T& GetValue( const char *pAttributeName, const T& defaultValue ) const;
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const char * GetValueString( const char *pAttributeName ) const;
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template< class E > E* GetValueElement( const char *pAttributeName ) const;
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// set attribute value
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CDmAttribute* SetValue( const char *pAttributeName, const void *value, size_t size );
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template< class T > CDmAttribute* SetValue( const char *pAttributeName, const T& value );
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template< class E > CDmAttribute* SetValue( const char *pAttributeName, E* value );
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// set attribute value if the attribute doesn't already exist
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CDmAttribute* InitValue( const char *pAttributeName, const void *value, size_t size );
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template< class T > CDmAttribute* InitValue( const char *pAttributeName, const T& value );
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template< class E > CDmAttribute* InitValue( const char *pAttributeName, E* value );
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// Parses an attribute from a string
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// Doesn't create an attribute if it doesn't exist and always preserves attribute type
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void SetValueFromString( const char *pAttributeName, const char *value );
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const char *GetValueAsString( const char *pAttributeName, char *pBuffer, size_t buflen ) const;
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// Helpers for our RTTI
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template< class E > bool IsA() const;
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bool IsA( const char *pTypeName ) const;
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int GetInheritanceDepth( const char *pTypeName ) const;
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static CUtlSymbol GetStaticTypeSymbol();
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// Indicates whether this element should be copied or not
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void SetShared( bool bShared );
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bool IsShared() const;
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// Copies an element and all its attributes
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CDmElement* Copy( TraversalDepth_t depth = TD_DEEP ) const;
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// Copies attributes from a specified element
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void CopyAttributesTo( CDmElement *pCopy, TraversalDepth_t depth = TD_DEEP ) const;
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// recursively set fileid's, with option to only change elements in the matched file
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void SetFileId( DmFileId_t fileid, TraversalDepth_t depth, bool bOnlyIfMatch = false );
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DmFileId_t GetFileId() const;
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bool IsAccessible() const;
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void MarkAccessible( bool bAccessible );
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void MarkAccessible( TraversalDepth_t depth = TD_ALL );
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// returns the first path to the element found traversing all element/element
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// array attributes - not necessarily the shortest.
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// cycle-safe (skips any references to elements in the current path)
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// but may re-traverse elements via different paths
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bool FindElement( const CDmElement *pElement, CUtlVector< ElementPathItem_t > &elementPath, TraversalDepth_t depth ) const;
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bool FindReferer( DmElementHandle_t hElement, CUtlVector< ElementPathItem_t > &elementPath, TraversalDepth_t depth ) const;
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void RemoveAllReferencesToElement( CDmElement *pElement );
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bool IsStronglyReferenced() { return m_ref.IsStronglyReferenced(); }
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// Estimates the memory usage of the element, its attributes, and child elements
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int EstimateMemoryUsage( TraversalDepth_t depth = TD_DEEP );
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protected:
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// NOTE: These are protected to ensure that the factory is the only thing that can create these
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CDmElement( DmElementHandle_t handle, const char *objectType, const DmObjectId_t &id, const char *objectName, DmFileId_t fileid );
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virtual ~CDmElement();
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// Used by derived classes to do construction and setting up CDmaVars
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void OnConstruction() { }
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void OnDestruction() { }
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virtual void PerformConstruction();
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virtual void PerformDestruction();
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// Internal methods related to RTII
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static void SetTypeSymbol( CUtlSymbol sym );
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static bool IsA_Implementation( CUtlSymbol typeSymbol );
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static int GetInheritanceDepth_Implementation( CUtlSymbol typeSymbol, int nCurrentDepth );
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// Internal method for creating a copy of this element
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CDmElement* CopyInternal( TraversalDepth_t depth = TD_DEEP ) const;
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// helper for making attributevarelementarray cleanup easier
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template< class T > static void DeleteAttributeVarElementArray( T &array );
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private:
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typedef CUtlMap< DmElementHandle_t, DmElementHandle_t, int > CRefMap;
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// Bogus constructor
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CDmElement();
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// internal recursive copy method - builds refmap of old element's handle -> copy's handle, and uses it to fixup references
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void CopyAttributesTo( CDmElement *pCopy, CRefMap &refmap, TraversalDepth_t depth ) const;
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void CopyElementAttribute( const CDmAttribute *pAttr, CDmAttribute *pCopyAttr, CRefMap &refmap, TraversalDepth_t depth ) const;
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void CopyElementArrayAttribute( const CDmAttribute *pAttr, CDmAttribute *pCopyAttr, CRefMap &refmap, TraversalDepth_t depth ) const;
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void FixupReferences( CUtlHashFast< DmElementHandle_t > &visited, const CRefMap &refmap, TraversalDepth_t depth );
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void SetFileId( DmFileId_t fileid );
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void SetFileId_R( CUtlHashFast< DmElementHandle_t > &visited, DmFileId_t fileid, TraversalDepth_t depth, DmFileId_t match, bool bOnlyIfMatch );
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CDmAttribute* CreateAttribute( const char *pAttributeName, DmAttributeType_t type );
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void RemoveAttribute( CDmAttribute **pAttrRef );
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CDmAttribute* AddExternalAttribute( const char *pAttributeName, DmAttributeType_t type, void *pMemory );
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CDmAttribute *FindAttribute( const char *pAttributeName ) const;
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void Purge();
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void SetId( const DmObjectId_t &id );
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bool IsDirty() const;
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void MarkDirty( bool dirty = true );
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void MarkAttributesClean();
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void MarkBeingUnserialized( bool beingUnserialized = true );
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bool IsBeingUnserialized() const;
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// Used by the undo system only.
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void AddAttributeByPtr( CDmAttribute *ptr );
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void RemoveAttributeByPtrNoDelete( CDmAttribute *ptr );
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// Should only be called from datamodel, who will take care of changing the fileset entry as well
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void ChangeHandle( DmElementHandle_t handle );
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// returns element reference struct w/ list of referrers and handle count
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DmElementReference_t* GetReference();
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void SetReference( const DmElementReference_t &ref );
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// Estimates memory usage
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int EstimateMemoryUsage( CUtlHash< DmElementHandle_t > &visited, TraversalDepth_t depth, int *pCategories );
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protected:
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CDmaString m_Name;
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private:
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CDmAttribute *m_pAttributes;
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DmElementReference_t m_ref;
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UtlSymId_t m_Type;
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bool m_bDirty : 1;
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bool m_bBeingUnserialized : 1;
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bool m_bIsAcessible : 1;
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unsigned char m_nReserved; // Makes Id be quad aligned
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DmObjectId_t m_Id;
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DmFileId_t m_fileId;
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// Stores the type symbol
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static CUtlSymbol m_classType;
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// Factories can access our constructors
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template <class T> friend class CDmElementFactory;
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template <class T> friend class CDmAbstractElementFactory;
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template< class T > friend class CDmaVar;
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template< class T > friend class CDmaArray;
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template< class T > friend class CDmaElementArray;
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template< class T, class B > friend class CDmaDecorator;
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template< class T > friend class CDmrElementArray;
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friend class CDmElementFactoryDefault;
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friend class CDmeElementAccessor;
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friend class CDmeOperator;
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friend void CopyElements( const CUtlVector< CDmElement* > &from, CUtlVector< CDmElement* > &to, TraversalDepth_t depth );
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};
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inline void DestroyElement( CDmElement *pElement )
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{
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if ( pElement )
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{
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g_pDataModel->DestroyElement( pElement->GetHandle() );
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}
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}
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void DestroyElement( CDmElement *pElement, TraversalDepth_t depth );
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//-----------------------------------------------------------------------------
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// copy groups of elements together so that references between them are maintained
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//-----------------------------------------------------------------------------
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void CopyElements( const CUtlVector< CDmElement* > &from, CUtlVector< CDmElement* > &to, TraversalDepth_t depth = TD_DEEP );
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//-----------------------------------------------------------------------------
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// allows elements to chain OnAttributeChanged up to their parents (or at least, referrers)
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//-----------------------------------------------------------------------------
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void InvokeOnAttributeChangedOnReferrers( DmElementHandle_t hElement, CDmAttribute *pChangedAttr );
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//-----------------------------------------------------------------------------
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// Returns the type, name, id, fileId
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//-----------------------------------------------------------------------------
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inline UtlSymId_t CDmElement::GetType() const
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{
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return m_Type;
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}
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inline const char *CDmElement::GetTypeString() const
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{
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return g_pDataModel->GetString( m_Type );
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}
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inline const char *CDmElement::GetName() const
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{
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return m_Name.Get();
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}
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inline void CDmElement::SetName( const char* pName )
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{
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m_Name.Set( pName );
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}
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inline const DmObjectId_t& CDmElement::GetId() const
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{
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return m_Id;
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}
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inline DmFileId_t CDmElement::GetFileId() const
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{
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return m_fileId;
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}
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//-----------------------------------------------------------------------------
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// Controls whether the element should be copied by default
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//-----------------------------------------------------------------------------
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inline void CDmElement::SetShared( bool bShared )
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{
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if ( bShared )
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{
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SetValue< bool >( "shared", true );
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}
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else
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{
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RemoveAttribute( "shared" );
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}
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}
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inline bool CDmElement::IsShared() const
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{
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return GetValue< bool >( "shared" ); // if attribute doesn't exist, returns default bool value, which is false
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}
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//-----------------------------------------------------------------------------
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// Copies attributes from a specified element
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//-----------------------------------------------------------------------------
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inline CDmElement* CDmElement::Copy( TraversalDepth_t depth ) const
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{
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return CopyInternal( depth );
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}
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//-----------------------------------------------------------------------------
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// RTTI
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//-----------------------------------------------------------------------------
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inline bool CDmElement::IsA_Implementation( CUtlSymbol typeSymbol )
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{
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return ( m_classType == typeSymbol ) || ( UTL_INVAL_SYMBOL == typeSymbol );
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}
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inline int CDmElement::GetInheritanceDepth_Implementation( CUtlSymbol typeSymbol, int nCurrentDepth )
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{
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return IsA_Implementation( typeSymbol ) ? nCurrentDepth : -1;
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}
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inline CUtlSymbol CDmElement::GetStaticTypeSymbol()
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{
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return m_classType;
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}
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inline bool CDmElement::IsA( const char *pTypeName ) const
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{
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CUtlSymbol typeSymbol = g_pDataModel->GetSymbol( pTypeName );
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return IsA( typeSymbol );
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}
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template< class E > inline bool CDmElement::IsA() const
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{
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return IsA( E::GetStaticTypeSymbol() );
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}
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//-----------------------------------------------------------------------------
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// Helper for finding elements that refer to this element
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//-----------------------------------------------------------------------------
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template< class T >
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T *FindReferringElement( CDmElement *pElement, const char *pAttrName, bool bMustBeInSameFile = true )
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{
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return FindReferringElement< T >( pElement, g_pDataModel->GetSymbol( pAttrName ), bMustBeInSameFile );
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}
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void RemoveElementFromRefereringAttributes( CDmElement *pElement, bool bPreserveOrder = true );
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//-----------------------------------------------------------------------------
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//
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// element-specific unique name generation methods
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//
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//-----------------------------------------------------------------------------
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// returns startindex if none found, 2 if only "prefix" found, and n+1 if "prefixn" found
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int GenerateUniqueNameIndex( const char *prefix, const CUtlVector< DmElementHandle_t > &array, int startindex = -1 );
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bool GenerateUniqueName( char *name, int memsize, const char *prefix, const CUtlVector< DmElementHandle_t > &array );
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void MakeElementNameUnique( CDmElement *pElement, const char *prefix, const CUtlVector< DmElementHandle_t > &array, bool forceIndex = false );
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//-----------------------------------------------------------------------------
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// helper for making attributevarelementarray cleanup easier
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//-----------------------------------------------------------------------------
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template< class T >
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inline void CDmElement::DeleteAttributeVarElementArray( T &array )
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{
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int nElements = array.Count();
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for ( int i = 0; i < nElements; ++i )
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{
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g_pDataModel->DestroyElement( array.GetHandle( i ) );
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}
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array.RemoveAll();
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}
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//-----------------------------------------------------------------------------
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// Default size computation
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//-----------------------------------------------------------------------------
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template< class T >
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int DmeEstimateMemorySize( T* pElement )
|
|
{
|
|
return sizeof( T );
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Helper macro to create an element; this is used for elements that are helper base classes
|
|
//-----------------------------------------------------------------------------
|
|
#define DEFINE_UNINSTANCEABLE_ELEMENT( className, baseClassName ) \
|
|
protected: \
|
|
className( DmElementHandle_t handle, const char *pElementTypeName, const DmObjectId_t &id, const char *pElementName, DmFileId_t fileid ) : \
|
|
baseClassName( handle, pElementTypeName, id, pElementName, fileid ) \
|
|
{ \
|
|
} \
|
|
virtual ~className() \
|
|
{ \
|
|
} \
|
|
void OnConstruction(); \
|
|
void OnDestruction(); \
|
|
virtual void PerformConstruction() \
|
|
{ \
|
|
BaseClass::PerformConstruction(); \
|
|
OnConstruction(); \
|
|
} \
|
|
virtual void PerformDestruction() \
|
|
{ \
|
|
OnDestruction(); \
|
|
BaseClass::PerformDestruction(); \
|
|
} \
|
|
virtual int AllocatedSize() const { return DmeEstimateMemorySize( this ); } \
|
|
\
|
|
private: \
|
|
typedef baseClassName BaseClass; \
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Helper macro to create the class factory
|
|
//-----------------------------------------------------------------------------
|
|
#define DEFINE_ELEMENT( className, baseClassName ) \
|
|
public: \
|
|
virtual bool IsA( UtlSymId_t typeSymbol ) const \
|
|
{ \
|
|
return IsA_Implementation( typeSymbol );\
|
|
} \
|
|
\
|
|
bool IsA( const char *pTypeName ) const \
|
|
{ \
|
|
CUtlSymbol typeSymbol = g_pDataModel->GetSymbol( pTypeName ); \
|
|
return IsA( typeSymbol ); \
|
|
} \
|
|
\
|
|
template< class T > bool IsA() const \
|
|
{ \
|
|
return IsA( T::GetStaticTypeSymbol() ); \
|
|
} \
|
|
\
|
|
virtual int GetInheritanceDepth( UtlSymId_t typeSymbol ) const \
|
|
{ \
|
|
return GetInheritanceDepth_Implementation( typeSymbol, 0 ); \
|
|
} \
|
|
\
|
|
static CUtlSymbol GetStaticTypeSymbol( ) \
|
|
{ \
|
|
return m_classType; \
|
|
} \
|
|
\
|
|
className* Copy( TraversalDepth_t depth = TD_DEEP ) const \
|
|
{ \
|
|
return static_cast< className* >( CopyInternal( depth ) ); \
|
|
} \
|
|
protected: \
|
|
className( DmElementHandle_t handle, const char *pElementTypeName, const DmObjectId_t &id, const char *pElementName, DmFileId_t fileid ) : \
|
|
baseClassName( handle, pElementTypeName, id, pElementName, fileid ) \
|
|
{ \
|
|
} \
|
|
virtual ~className() \
|
|
{ \
|
|
} \
|
|
void OnConstruction(); \
|
|
void OnDestruction(); \
|
|
virtual void PerformConstruction() \
|
|
{ \
|
|
BaseClass::PerformConstruction(); \
|
|
OnConstruction(); \
|
|
} \
|
|
virtual void PerformDestruction() \
|
|
{ \
|
|
OnDestruction(); \
|
|
BaseClass::PerformDestruction(); \
|
|
} \
|
|
static void SetTypeSymbol( CUtlSymbol typeSymbol ) \
|
|
{ \
|
|
m_classType = typeSymbol; \
|
|
} \
|
|
\
|
|
static bool IsA_Implementation( CUtlSymbol typeSymbol ) \
|
|
{ \
|
|
if ( typeSymbol == m_classType ) \
|
|
return true; \
|
|
return BaseClass::IsA_Implementation( typeSymbol ); \
|
|
} \
|
|
\
|
|
static int GetInheritanceDepth_Implementation( CUtlSymbol typeSymbol, int nCurrentDepth ) \
|
|
{ \
|
|
if ( typeSymbol == m_classType ) \
|
|
return nCurrentDepth; \
|
|
return BaseClass::GetInheritanceDepth_Implementation( typeSymbol, nCurrentDepth+1 );\
|
|
} \
|
|
virtual int AllocatedSize() const { return DmeEstimateMemorySize( this ); } \
|
|
\
|
|
private: \
|
|
typedef baseClassName BaseClass; \
|
|
template <class T> friend class CDmElementFactory; \
|
|
template <class T> friend class CDmAbstractElementFactory; \
|
|
static CUtlSymbol m_classType
|
|
|
|
#define IMPLEMENT_ELEMENT( className ) \
|
|
CUtlSymbol className::m_classType = UTL_INVAL_SYMBOL;
|
|
|
|
|
|
#endif // DMELEMENT_H
|