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engines/titanic/core/message_target.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef TITANIC_MESSAGE_TARGET_H
+#define TITANIC_MESSAGE_TARGET_H
+
+#include "titanic/core/saveable_object.h"
+
+namespace Titanic {
+
+class CMessageTarget;
+class CMessage;
+
+typedef bool (CMessageTarget::*PMSG)(CMessage *msg);
+
+struct MSGMAP_ENTRY {
+	PMSG _fn;
+	const ClassDef * const *_class;
+};
+
+struct MSGMAP {
+	const MSGMAP *(* pFnGetBaseMap)();
+	const MSGMAP_ENTRY *lpEntries;
+};
+
+#define DECLARE_MESSAGE_MAP \
+protected: \
+	static const MSGMAP *getThisMessageMap(); \
+	const MSGMAP *getMessageMap() const override
+
+#define BEGIN_MESSAGE_MAP(theClass, baseClass) \
+	const MSGMAP *theClass::getMessageMap() const \
+		{ return getThisMessageMap(); } \
+	const MSGMAP *theClass::getThisMessageMap() \
+	{ \
+		typedef theClass ThisClass;						   \
+		typedef baseClass TheBaseClass;					   \
+		typedef bool (theClass::*FNPTR)(CMessage *msg);    \
+		static const MSGMAP_ENTRY _messageEntries[] = {
+
+#define ON_MESSAGE(msgClass) \
+	{ static_cast<PMSG>((FNPTR)&ThisClass::msgClass), &C##msgClass::_type },
+
+#define END_MESSAGE_MAP() \
+		{ (PMSG)nullptr, nullptr } \
+	}; \
+		static const MSGMAP messageMap = \
+		{ &TheBaseClass::getThisMessageMap, &_messageEntries[0] }; \
+		return &messageMap; \
+	}
+
+#define EMPTY_MESSAGE_MAP(theClass, baseClass) \
+	const MSGMAP *theClass::getMessageMap() const \
+		{ return getThisMessageMap(); } \
+	const MSGMAP *theClass::getThisMessageMap() \
+	{ \
+		typedef baseClass TheBaseClass;					   \
+		static const MSGMAP_ENTRY _messageEntries[] = { \
+		{ (PMSG)nullptr, nullptr } \
+	}; \
+		static const MSGMAP messageMap = \
+		{ &TheBaseClass::getThisMessageMap, &_messageEntries[0] }; \
+		return &messageMap; \
+	} \
+	enum { DUMMY }
+
+class CMessageTarget: public CSaveableObject {
+protected:
+	static const MSGMAP *getThisMessageMap();
+	virtual const MSGMAP *getMessageMap() const;
+
+public:
+	CLASSDEF;
+
+	/**
+	 * Save the data for the class to file
+	 */
+	void save(SimpleFile *file, int indent) override;
+
+	/**
+	 * Load the data for the class from file
+	 */
+	void load(SimpleFile *file) override;
+};
+
+} // End of namespace Titanic
+
+#endif /* TITANIC_MESSAGE_TARGET_H */