119 lines
3.7 KiB
Ucode
119 lines
3.7 KiB
Ucode
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/**
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* Base class for all switch condition ops which use an object value for branching.
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*
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* Copyright 1998-2013 Epic Games, Inc. All Rights Reserved.
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*/
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class SeqCond_SwitchObject extends SeqCond_SwitchBase
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native(inherit);
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cpptext
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{
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/* === USeqCond_SwitchBase interface === */
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/**
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* Returns the index of the OutputLink to activate for the specified object.
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*
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* @param out_LinksToActivate
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* the indexes [into the OutputLinks array] for the most appropriate OutputLinks to activate
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* for the specified object, or INDEX_NONE if none are found. Should only contain 0 or 1 elements
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* unless one of the matching cases is configured to fall through.
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*
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* @return TRUE if at least one match was found, FALSE otherwise.
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*/
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virtual UBOOL GetOutputLinksToActivate( TArray<INT>& out_LinksToActivate );
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/**
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* Returns the index [into the switch op's array of values] that corresponds to the specified OutputLink.
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*
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* @param OutputLinkIndex index into [into the OutputLinks array] to find the corresponding value index for
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*
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* @return INDEX_NONE if no value was found which matches the specified output link.
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*/
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virtual INT FindCaseValueIndex( INT OutputLinkIndex ) const;
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/** Returns the number of elements in this switch op's array of values. */
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virtual INT GetSupportedValueCount() const;
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/**
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* Returns a string representation of the value at the specified index. Used to populate the LinkDesc for the OutputLinks array.
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*/
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virtual FString GetCaseValueString( INT ValueIndex ) const;
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}
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/** Stores class name to compare for each output link and whether it should fall through to next node */
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struct native SwitchObjectCase
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{
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/** the value of this case statement */
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var() Object ObjectValue;
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/** indicates whether control should fall through to the next case upon a match*/
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var() bool bFallThru;
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/** true if this represents the default value option */
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var() bool bDefaultValue;
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};
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/**
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* Stores the list of values which are handled by this switch object.
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*/
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var() array<SwitchObjectCase> SupportedValues;
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/* === Events === */
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/**
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* Ensures that the last item in the value array represents the "default" item. Child classes should override this method to ensure that
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* their value array stays synchronized with the OutputLinks array.
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*/
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event VerifyDefaultCaseValue()
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{
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local int i;
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Super.VerifyDefaultCaseValue();
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SupportedValues.Length = OutputLinks.Length;
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for ( i = 0; i < SupportedValues.Length - 1; i++ )
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{
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SupportedValues[i].bDefaultValue = false;
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}
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SupportedValues[SupportedValues.Length-1].ObjectValue = None;
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SupportedValues[SupportedValues.Length-1].bFallThru = false;
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SupportedValues[SupportedValues.Length-1].bDefaultValue = true;
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}
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/**
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* Returns whether fall through is enabled for the specified case value.
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*/
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event bool IsFallThruEnabled( int ValueIndex )
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{
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// by default, fall thru is not enabled on anything
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return ValueIndex >= 0 && ValueIndex < SupportedValues.Length && SupportedValues[ValueIndex].bFallThru;
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}
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/**
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* Insert an empty element into this switch's value array at the specified index.
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*/
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event InsertValueEntry( int InsertIndex )
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{
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InsertIndex = Clamp(InsertIndex, 0, SupportedValues.Length);
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SupportedValues.Insert(InsertIndex, 1);
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}
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/**
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* Remove an element from this switch's value array at the specified index.
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*/
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event RemoveValueEntry( int RemoveIndex )
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{
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if ( RemoveIndex >= 0 && RemoveIndex < SupportedValues.Length )
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{
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SupportedValues.Remove(RemoveIndex, 1);
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}
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}
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DefaultProperties
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{
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SupportedValues(0)=(bDefaultValue=true)
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ObjName="Switch Object"
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VariableLinks(0)=(ExpectedType=class'SeqVar_Object',LinkDesc="Object")
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}
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