/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* hex-document.h

   Copyright (C) 1998, 1999 Free Software Foundation

   GHex 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 2 of the
   License, or (at your option) any later version.

   GHex 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 GHex; see the file COPYING.
   If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.

   Author: Jaka Mocnik <jaka.mocnik@kiss.uni-lj.si>
 */

#ifndef __HEX_DOCUMENT_H__
#define __HEX_DOCUMENT_H__

#include <gtk/gtk.h>
#include <gdk/gdk.h>

#include <gnome.h>

BEGIN_GNOME_DECLS

#define HEX_DOCUMENT(obj)          GTK_CHECK_CAST (obj, hex_document_get_type (), HexDocument)
#define HEX_DOCUMENT_CLASS(klass)  GTK_CHECK_CLASS_CAST (klass, hex_document_get_type (), HexDocumentClass)
#define IS_HEX_DOCUMENT(obj)       GTK_CHECK_TYPE (obj, hex_document_get_type ())

typedef struct _HexDocument       HexDocument;
typedef struct _HexDocumentClass  HexDocumentClass;
typedef struct _HexChangeData     HexChangeData;

typedef enum {
	HEX_CHANGE_STRING,
	HEX_CHANGE_BYTE
} HexChangeType;

struct _HexChangeData {
	gint start, end;
	gboolean lower_nibble;
	HexChangeType type;
	gchar *v_string;
	gchar v_byte;
};

struct _HexDocument
{
	GnomeMDIChild mdi_child;
	
	gchar *file_name;
	gchar *path_end;
	FILE *file;
	
	guchar *buffer;
	guint buffer_size;
	
	gboolean changed;

	GList *undo_stack;
	GList *undo_top;   /* top of the stack (for redo) */
	guint undo_depth;
	guint undo_max;

	HexChangeData change_data;
};

struct _HexDocumentClass
{
	GnomeMDIChildClass parent_class;
	
	void (*document_changed)(HexDocument *, gpointer, gboolean);
};

GtkType hex_document_get_type(void);
HexDocument *hex_document_new(const gchar *);
void hex_document_set_data(HexDocument *, guint, guint, guchar *);
void hex_document_set_byte(HexDocument *, guchar, guint);
void hex_document_set_nibble(HexDocument *, guchar, guint, gboolean);
gint hex_document_read(HexDocument *doc);
gint hex_document_write(HexDocument *doc);
gboolean hex_document_has_changed(HexDocument *doc);
void hex_document_changed(HexDocument *doc, gpointer change_data, gboolean push_undo);
GnomeMDIChild *hex_document_new_from_config(const gchar *);
void hex_document_set_max_undo(HexDocument *doc, guint max_undo);
gint find_string_forward(HexDocument *doc, guint start, guchar *what, gint len, guint *found);
gint find_string_backward(HexDocument *doc, guint start, guchar *what, gint len, guint *found);

END_GNOME_DECLS

#endif /* __HEX_DOCUMENT_H__ */