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/*
* Copyright (C) 2002 Red Hat, Inc.
*
* This is free software; you can redistribute it and/or modify it under
* the terms of the GNU Library General Public License as published by
* the Free Software Foundation; either version 2 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 Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* The interfaces in this file are subject to change at any time. */
#ifndef vte_ring_h_included
#define vte_ring_h_included
#include "vterowdata.h"
#include "vtestream.h"
G_BEGIN_DECLS
typedef struct _VteCellAttrChange {
gsize text_offset;
VteIntCellAttr attr;
} VteCellAttrChange;
/*
* VteRing: A scrollback buffer ring
*/
typedef struct _VteRing VteRing;
struct _VteRing {
guint max;
guint start, end;
/* Writable */
guint writable, mask;
VteRowData *array;
/* Storage */
guint last_page;
VteStream *attr_stream, *text_stream, *row_stream;
VteCellAttrChange last_attr;
GString *utf8_buffer;
VteRowData cached_row;
guint cached_row_num;
};
#define _vte_ring_contains(__ring, __position) \
(((__position) >= (__ring)->start) && \
((__position) < (__ring)->end))
#define _vte_ring_delta(__ring) ((__ring)->start + 0)
#define _vte_ring_length(__ring) ((__ring)->end - (__ring)->start)
#define _vte_ring_next(__ring) ((__ring)->end + 0)
VTE_STATIC const VteRowData *_vte_ring_index (VteRing *ring, guint position);
VTE_STATIC VteRowData *_vte_ring_index_writable (VteRing *ring, guint position);
VTE_STATIC void _vte_ring_init (VteRing *ring, guint max_rows);
VTE_STATIC void _vte_ring_fini (VteRing *ring);
VTE_STATIC void _vte_ring_resize (VteRing *ring, guint max_rows);
VTE_STATIC void _vte_ring_shrink (VteRing *ring, guint max_len);
VTE_STATIC VteRowData *_vte_ring_insert (VteRing *ring, guint position);
VTE_STATIC VteRowData *_vte_ring_append (VteRing *ring);
VTE_STATIC void _vte_ring_remove (VteRing *ring, guint position);
G_END_DECLS
#endif
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