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/********************************************************************************
* *
* M e t a C l a s s O b j e c t *
* *
*********************************************************************************
* Copyright (C) 1997,2022 by Jeroen van der Zijp. All Rights Reserved. *
*********************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as published by *
* the Free Software Foundation; either version 3 of the License, or *
* (at your option) any later version. *
* *
* This library 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 Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/> *
********************************************************************************/
#ifndef FXMETACLASS_H
#define FXMETACLASS_H
namespace FX {
class FXObject;
/// Minimum and maximum message type
enum {
MINTYPE = 0,
MAXTYPE = 65535
};
/// Minimum and maximum message id
enum {
MINKEY = 0,
MAXKEY = 65535
};
/// Association key
typedef FXuint FXSelector;
/// Describes a FOX object
class FXAPI FXMetaClass {
private:
const FXchar *className; // Class name
FXObject* (*manufacture)(); // Factory function
const FXMetaClass *baseClass; // Base classes' metaclass
const void *assoc; // Associated handlers
FXuint nassocs; // Count of handlers
FXuint assocsz; // Size of association
private:
static const FXMetaClass **metaClassTable; // Class table
static FXuint metaClassSlots; // Number of slots
static FXuint metaClassCount; // Number items
private:
static void resize(FXuint slots);
private:
FXMetaClass(const FXMetaClass&);
FXMetaClass &operator=(const FXMetaClass&);
public:
/// Create one metaclass for each class
FXMetaClass(const FXchar* name,FXObject *(fac)(),const FXMetaClass* base,const void* ass,FXuint nass,FXuint assz);
/// Make instance of some object
FXObject* makeInstance() const;
/// Search message map
const void* search(FXSelector key) const;
/// Ask class name
const FXchar* getClassName() const { return className; }
/// Ask base class
const FXMetaClass* getBaseClass() const { return baseClass; }
/// Check if metaclass is subclass of some other metaclass
FXbool isSubClassOf(const FXMetaClass* metaclass) const;
/// Find metaclass object
static const FXMetaClass* getMetaClassFromName(const FXchar* name);
/// Make NULL object
static FXObject* nullObject();
/// Destroy metaclass
~FXMetaClass();
};
}
#endif
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