upload "kind" alien swarm

game/missionchooser/layout_system/tilegen_mission_preprocessor.h

@@ -0,0 +1,75 @@
+//============ Copyright (c) Valve Corporation, All rights reserved. ============
+//
+// Definition of a class to pre-process mission files and perform
+// rule substitution.
+//
+//===============================================================================
+
+#ifndef TILEGEN_MISSION_PREPROCESSOR_H
+#define TILEGEN_MISSION_PREPROCESSOR_H
+
+#if defined( COMPILER_MSVC )
+#pragma once
+#endif
+
+#include "utlvector.h"
+
+class KeyValues;
+class CTilegenRule;
+class CTilegenEnum;
+
+//-----------------------------------------------------------------------------
+// Rule-based pre-processor for mission key-values.
+// Substitutes "rule_instance" nodes with the contents of the corresponding 
+// "rule" node and fixes up instance values.
+//-----------------------------------------------------------------------------
+class CTilegenMissionPreprocessor
+{
+public:
+	friend class CTilegenRule;
+
+	CTilegenMissionPreprocessor() : m_nUniqueIndex( 0 ) { }
+	~CTilegenMissionPreprocessor();
+
+	int GetRuleCount() const { return m_Rules.Count(); }
+	const CTilegenRule *GetRule( int i ) const { return m_Rules[i]; }
+	const CTilegenRule *FindRule( const char *pRuleName ) const;
+
+	int GetEnumCount() const { return m_Enums.Count(); }
+	const CTilegenEnum *GetEnum( int i ) const { return m_Enums[i]; }
+	const CTilegenEnum *FindEnum( const char *pEnumName ) const;
+
+	//-----------------------------------------------------------------------------
+	// Searches the top level KeyValues file for 'rule' blocks, extracts
+	// the rule definition from the KeyValues data, and creates
+	// an internal CTilegenRule for each.
+	// This is a destructive operation; the rule blocks are stripped from the file.
+	// 
+	// NOTE: Caller is still responsible for cleaning up root-level key-values
+	// data.
+	//
+	// Returns true on success, false otherwise.
+	//-----------------------------------------------------------------------------
+	bool ParseAndStripRules( KeyValues *pRulesKV );
+
+	//-----------------------------------------------------------------------------
+	// Recursively walks the KeyValues file looking for rule_instances to 
+	// replace with a corresponding rule.
+	//
+	// Returns true on success, false otherwise.
+	//-----------------------------------------------------------------------------
+	bool SubstituteRules( KeyValues *pKeyValues );
+
+private:
+	// Called by CTilegenRule
+	void EvaluateMetaVariables( KeyValues *pKeyValues );
+
+	bool SubstituteRules_Recursive( KeyValues *pParent, KeyValues *pKeyValues );
+	
+	CUtlVector< CTilegenEnum * > m_Enums;
+	CUtlVector< CTilegenRule * > m_Rules;
+	// Index used to generate unique names when pre-processing a file.
+	int m_nUniqueIndex;
+};
+
+#endif // TILEGEN_MISSION_PREPROCESSOR_H