C++ UObject::Mark方法代码示例

void UExporter::ExportComponentDefinitions(const FExportObjectInnerContext* Context, const TArray<UObject*>& Components, FOutputDevice& Ar, uint32 PortFlags)
{
	PortFlags |= PPF_ExportsNotFullyQualified;

	if (!(PortFlags & PPF_SeparateDefine))
	{
		// export forward declarations
		// technically we only need to do this if there are circular references but it doesn't seem worth it
		// to complicate this code for a minor speed improvement in the text import path
		for (int32 ComponentIndex = 0; ComponentIndex < Components.Num(); ComponentIndex++)
		{
			UObject* Component = Components[ComponentIndex];
			FName ComponentName = Component->GetFName();
			if (!Component->HasAnyMarks(OBJECTMARK_TagImp) && !Component->HasAnyFlags(RF_TextExportTransient))
			{
				if (Component->HasAnyFlags(RF_ClassDefaultObject) || Component->GetArchetype()->HasAllFlags(RF_ClassDefaultObject))
				{
					Ar.Logf(TEXT("%sBegin Object Class=%s Name=%s ObjName=%s%s"), FCString::Spc(TextIndent), *Component->GetClass()->GetName(), *ComponentName.ToString(), *Component->GetName(), LINE_TERMINATOR);
				}
				else
				{
					Ar.Logf(TEXT("%sBegin Object Class=%s Name=%s ObjName=%s Archetype=%s'%s'%s"),FCString::Spc(TextIndent),*Component->GetClass()->GetName(), *ComponentName.ToString(), *Component->GetName(), *Component->GetArchetype()->GetClass()->GetName(), *Component->GetArchetype()->GetPathName(), LINE_TERMINATOR);
				}
				if (PortFlags & PPF_SeparateDeclare)
				{
					ExportObjectInner(Context, Component, Ar, PortFlags, false);
				}
				Ar.Logf(TEXT("%sEnd Object%s"), FCString::Spc(TextIndent), LINE_TERMINATOR);
			}
		}
	}

	if (!(PortFlags & PPF_SeparateDeclare))
	{
		// export property definitions
		for (int32 ComponentIndex = 0; ComponentIndex < Components.Num(); ComponentIndex++)
		{
			UObject* Component = Components[ComponentIndex];
			FName ComponentName = Component->GetFName();
			if (!Component->HasAnyMarks(OBJECTMARK_TagImp) && !Component->HasAnyFlags(RF_TextExportTransient))
			{
				Ar.Logf(TEXT("%sBegin Object Name=%s%s"), FCString::Spc(TextIndent), *ComponentName.ToString(), LINE_TERMINATOR);

				uint32 OldPortFlags = PortFlags;

				if (!(Component->HasAnyFlags(RF_ClassDefaultObject) || Component->GetArchetype()->HasAllFlags(RF_ClassDefaultObject)))
				{
					// we created this thing with an archetype (see archetype=, above), so we don't want to list the archetype because it is unqualified and will clash, resetting the archetype pointer to something silly
					PortFlags |= PPF_NoInternalArcheType;
				}
				ExportObjectInner(Context, Component, Ar, PortFlags, false);

				PortFlags = OldPortFlags;
				Ar.Logf(TEXT("%sEnd Object%s"), FCString::Spc(TextIndent), LINE_TERMINATOR);

				Component->Mark(OBJECTMARK_TagImp);
			}
		}
	}
}

// This is from FArchiveTraceRoute -This only creates object graph of all objects 
// This can be used by other classes such as FTraceReferences - trace references of one object
FArchiveObjectGraph::FArchiveObjectGraph(bool IncludeTransients, EObjectFlags	KeepFlags)
:	CurrentReferencer(NULL),
	bIncludeTransients(IncludeTransients), 
	RequiredFlags(KeepFlags)
{
	ArIsObjectReferenceCollector = true;

	// ALL objects reference their outers...it's just log spam here
	//ArIgnoreOuterRef = true;

	TArray<UObject*> RootObjects;

	// allocate enough memory for all objects
	ObjectGraph.Empty(GetUObjectArray().GetObjectArrayNum());
	RootObjects.Empty(GetUObjectArray().GetObjectArrayNum());

	// search for objects that have the right flags and add them to the list of objects that we're going to start with
	// all other objects need to be tagged so that we can tell whether they've been serialized or not.
	for( FObjectIterator It; It; ++It )
	{
		UObject* CurrentObject = *It;
		if ( CurrentObject->HasAnyFlags(RequiredFlags) )
		{
			// make sure it isn't tagged
			// ASKRON: WHY do we need this?
			CurrentObject->UnMark(OBJECTMARK_TagExp);
			RootObjects.Add(CurrentObject);
			ObjectGraph.Add(CurrentObject, new FObjectGraphNode(CurrentObject));
		}
		else
		{
			// ASKRON: WHY do we need this?
			CurrentObject->Mark(OBJECTMARK_TagExp);
		}
	}

	// Populate the ObjectGraph - this serializes our root set to map out the relationships between all rooted objects
	GenerateObjectGraph(RootObjects);

	// we won't be adding any additional objects for the arrays and graphs, so free up any memory not being used.
	RootObjects.Shrink();
	ObjectGraph.Shrink();

	// we're done with serialization; clear the tags so that we don't interfere with anything else
	for( FObjectIterator It; It; ++It )
	{
		It->UnMark(OBJECTMARK_TagExp);
	}
}

/**
 * Exports the property values for the specified object as text to the output device.
 *
 * @param	Context			Context from which the set of 'inner' objects is extracted.  If NULL, an object iterator will be used.
 * @param	Out				the output device to send the exported text to
 * @param	ObjectClass		the class of the object to dump properties for
 * @param	Object			the address of the object to dump properties for
 * @param	Indent			number of spaces to prepend to each line of output
 * @param	DiffClass		the class to use for comparing property values when delta export is desired.
 * @param	Diff			the address of the object to use for determining whether a property value should be exported.  If the value in Object matches the corresponding
 *							value in Diff, it is not exported.  Specify NULL to export all properties.
 * @param	Parent			the UObject corresponding to Object
 * @param	PortFlags		flags used for modifying the output and/or behavior of the export
 */
void ExportProperties
(
    const FExportObjectInnerContext* Context,
    FOutputDevice&	Out,
    UClass*			ObjectClass,
    uint8*			Object,
    int32				Indent,
    UClass*			DiffClass,
    uint8*			Diff,
    UObject*		Parent,
    uint32			PortFlags,
    UObject*		ExportRootScope
)
{
    FString ThisName = TEXT("(none)");
    check(ObjectClass != NULL);

    for( UProperty* Property = ObjectClass->PropertyLink; Property; Property = Property->PropertyLinkNext )
    {
        if (!Property->ShouldPort(PortFlags))
            continue;

        ThisName = Property->GetName();
        UArrayProperty* ArrayProperty = Cast<UArrayProperty>(Property);
        UObjectPropertyBase* ExportObjectProp = (Property->PropertyFlags & CPF_ExportObject) != 0 ? Cast<UObjectPropertyBase>(Property) : NULL;
        const uint32 ExportFlags = PortFlags | PPF_Delimited;

        if ( ArrayProperty != NULL )
        {
            // Export dynamic array.
            UProperty* InnerProp = ArrayProperty->Inner;
            ExportObjectProp = (Property->PropertyFlags & CPF_ExportObject) != 0 ? Cast<UObjectPropertyBase>(InnerProp) : NULL;
            // This is used as the default value in the case of an array property that has
            // fewer elements than the exported object.
            uint8* StructDefaults = NULL;
            UStructProperty* StructProperty = Cast<UStructProperty>(InnerProp);
            if ( StructProperty != NULL )
            {
                checkSlow(StructProperty->Struct);
                StructDefaults = (uint8*)FMemory::Malloc(StructProperty->Struct->GetStructureSize());
                StructProperty->InitializeValue(StructDefaults);
            }

            for( int32 PropertyArrayIndex=0; PropertyArrayIndex<Property->ArrayDim; PropertyArrayIndex++ )
            {
                void* Arr = Property->ContainerPtrToValuePtr<void>(Object, PropertyArrayIndex);
                FScriptArrayHelper ArrayHelper(ArrayProperty, Arr);

                void*	DiffArr = NULL;
                if( DiffClass )
                {
                    DiffArr = Property->ContainerPtrToValuePtrForDefaults<void>(DiffClass, Diff, PropertyArrayIndex);
                }
                // we won't use this if DiffArr is NULL, but we have to set it up to something
                FScriptArrayHelper DiffArrayHelper(ArrayProperty, DiffArr);

                bool bAnyElementDiffered = false;
                for( int32 DynamicArrayIndex=0; DynamicArrayIndex<ArrayHelper.Num(); DynamicArrayIndex++ )
                {
                    FString	Value;

                    // compare each element's value manually so that elements which match the NULL value for the array's inner property type
                    // but aren't in the diff array are still exported
                    uint8* SourceData = ArrayHelper.GetRawPtr(DynamicArrayIndex);
                    uint8* DiffData = DiffArr && DynamicArrayIndex < DiffArrayHelper.Num()
                                      ? DiffArrayHelper.GetRawPtr(DynamicArrayIndex)
                                      : StructDefaults;

                    bool bExportItem = DiffData == NULL || (DiffData != SourceData && !InnerProp->Identical(SourceData, DiffData, ExportFlags));
                    if ( bExportItem )
                    {
                        bAnyElementDiffered = true;
                        InnerProp->ExportTextItem(Value, SourceData, DiffData, Parent, ExportFlags, ExportRootScope);
                        if(ExportObjectProp)
                        {
                            UObject* Obj = ExportObjectProp->GetObjectPropertyValue(ArrayHelper.GetRawPtr(DynamicArrayIndex));
                            check(!Obj || Obj->IsValidLowLevel());
                            if( Obj && !Obj->HasAnyMarks(OBJECTMARK_TagImp) )
                            {
                                // only export the BEGIN OBJECT block for a component if Parent is the component's Outer....when importing subobject definitions,
                                // (i.e. BEGIN OBJECT), whichever BEGIN OBJECT block a component's BEGIN OBJECT block is located within is the object that will be
                                // used as the Outer to create the component

                                // Is this an array of components?
                                if ( InnerProp->HasAnyPropertyFlags(CPF_InstancedReference) )
                                {
//.........这里部分代码省略.........

void UExporter::ExportObjectInner(const FExportObjectInnerContext* Context, UObject* Object, FOutputDevice& Ar, uint32 PortFlags, bool bSkipComponents)
{
	// indent all the text in here
	TextIndent += 3;

	FExportObjectInnerContext::InnerList ObjectInners;
	if ( Context )
	{
		const FExportObjectInnerContext::InnerList* Inners = Context->ObjectToInnerMap.Find( Object );
		if ( Inners )
		{
			ObjectInners = *Inners;
		}
	}
	else
	{
		for (TObjectIterator<UObject> It; It; ++It)
		{
			if ( It->GetOuter() == Object )
			{
				ObjectInners.Add( *It );
			}
		}
	}


	TArray<UObject*> Components;
	if (!bSkipComponents)
	{
		// first export the components
		Object->CollectDefaultSubobjects(Components, false);
	}

	if (!(PortFlags & PPF_SeparateDefine))
	{
		for ( int32 ObjIndex = 0 ; ObjIndex < ObjectInners.Num() ; ++ObjIndex )
		{
			// NOTE: We ignore inner objects that have been tagged for death
			UObject* Obj = ObjectInners[ObjIndex];
			if ( !Obj->IsPendingKill() && !Obj->IsDefaultSubobject() && !Obj->HasAnyFlags(RF_TextExportTransient) && FCString::Stricmp(*Obj->GetClass()->GetName(), TEXT("Model")) != 0)
			{
				// export the object
				UExporter::ExportToOutputDevice( Context, Obj, NULL, Ar, (PortFlags & PPF_Copy) ? TEXT("Copy") : TEXT("T3D"), TextIndent, PortFlags | PPF_SeparateDeclare, false, ExportRootScope );
			}
		}

		if (!bSkipComponents)
		{
			ExportComponentDefinitions(Context, Components, Ar, PortFlags | PPF_SeparateDeclare);
		}
	}

	if (!(PortFlags & PPF_SeparateDeclare))
	{
		for ( int32 ObjIndex = 0 ; ObjIndex < ObjectInners.Num() ; ++ObjIndex )
		{
			// NOTE: We ignore inner objects that have been tagged for death
			UObject* Obj = ObjectInners[ObjIndex];
			if ( !Obj->IsPendingKill() && !Obj->IsDefaultSubobject() && !Obj->HasAnyFlags(RF_TextExportTransient) && FCString::Stricmp(*Obj->GetClass()->GetName(), TEXT("Model")) != 0)
			{
				// export the object
				UExporter::ExportToOutputDevice( Context, Obj, NULL, Ar, (PortFlags & PPF_Copy) ? TEXT("Copy") : TEXT("T3D"), TextIndent, PortFlags | PPF_SeparateDefine, false, ExportRootScope );

				// don't reexport below in ExportProperties
				Obj->Mark(OBJECTMARK_TagImp);
			}
		}

		if (!bSkipComponents)
		{
			ExportComponentDefinitions(Context, Components, Ar, PortFlags | PPF_SeparateDefine);
		}

		// export the object's properties
		// Note: we use archetype as the object to diff properties against before they exported. When object is created, they should create from archetype
		// and using this system, it should recover all properties it needs to copy
		uint8 *CompareObject;
		if (Object->HasAnyFlags(RF_ClassDefaultObject))
		{
			CompareObject = (uint8*)Object;
		}
		else
		{
			CompareObject = (uint8*)Object->GetArchetype();
		}
		ExportProperties( Context, Ar, Object->GetClass(), (uint8*)Object, TextIndent, Object->GetClass(), CompareObject, Object, PortFlags, ExportRootScope );

		if (!bSkipComponents)
		{
			// Export anything extra for the components. Used for instanced foliage.
			// This is done after the actor properties so these are set when regenerating the extra data objects.
			ExportComponentExtra( Context, Components, Ar, PortFlags );
		}
	}

	// remove indent
	TextIndent -= 3;
}