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/* Definitions for interface to indent.c
Copyright (C) 1985, 1986 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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, or (at your option)
any later version.
GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* We introduce new member `tab_offset'. We need it because of the
existence of wide-column characters. There is a case that the
line-break occurs at a wide-column character and the number of
colums of the line gets less than width.
Example (where W_ stands for a wide-column character):
----------
abcdefgh\\
W_
----------
To handle this case, we should not calculate the tab offset by
tab_offset += width;
Instead, we must remember tab_offset of the line.
*/
struct position
{
int bufpos;
int bytepos;
int hpos;
int vpos;
int prevhpos;
int contin;
/* Number of characters we have already handled
from the before and after strings at this position. */
int ovstring_chars_done;
int tab_offset;
};
struct position *compute_motion P_ ((int, int, int, int, int, int, int,
int, int, int, struct window *));
struct position *vmotion P_ ((int, int, struct window *));
int skip_invisible P_ ((int, int *, int, Lisp_Object));
/* Value of point when current_column was called */
extern int last_known_column_point;
/* Functions for dealing with the column cache. */
/* Return true iff the display table DISPTAB specifies the same widths
for characters as WIDTHTAB. We use this to decide when to
invalidate the buffer's column_cache. */
int disptab_matches_widthtab P_ ((struct Lisp_Char_Table *disptab,
struct Lisp_Vector *widthtab));
/* Recompute BUF's width table, using the display table DISPTAB. */
void recompute_width_table P_ ((struct buffer *buf,
struct Lisp_Char_Table *disptab));
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