ecdb79111c
The mechanism here is simple but hard to explain without leaning heavily on object-oriented jargon. Consider this a rough draft. Illustrations would certainly help clarify.
74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
/*
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* e-extension.h
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) version 3.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with the program; if not, see <http://www.gnu.org/licenses/>
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*
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*/
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#ifndef E_EXTENSION_H
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#define E_EXTENSION_H
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#include <glib-object.h>
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#include <e-util/e-extensible.h>
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/* Standard GObject macros */
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#define E_TYPE_EXTENSION \
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(e_extension_get_type ())
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#define E_EXTENSION(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST \
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((obj), E_TYPE_EXTENSION, EExtension))
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#define E_EXTENSION_CLASS(cls) \
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(G_TYPE_CHECK_CLASS_CAST \
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((cls), E_TYPE_EXTENSION, EExtensionClass))
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#define E_IS_EXTENSION(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE \
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((obj), E_TYPE_EXTENSION))
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#define E_IS_EXTENSION_CLASS(cls) \
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(G_TYPE_CHECK_CLASS_TYPE \
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((cls), E_TYPE_EXTENSION))
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#define E_EXTENSION_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS \
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((obj), E_TYPE_EXTENSION, EExtensionClass))
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G_BEGIN_DECLS
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typedef struct _EExtension EExtension;
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typedef struct _EExtensionClass EExtensionClass;
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typedef struct _EExtensionPrivate EExtensionPrivate;
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/**
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* EExtension:
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*
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* Contains only private data that should be read and manipulated using the
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* functions below.
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**/
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struct _EExtension {
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GObject parent;
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EExtensionPrivate *priv;
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};
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struct _EExtensionClass {
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GObjectClass parent_class;
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/* The type to extend. */
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GType extensible_type;
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};
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GType e_extension_get_type (void);
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EExtensible * e_extension_get_extensible (EExtension *extension);
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G_END_DECLS
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#endif /* E_EXTENSION_H */
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