Merge from emacs--devo--0
[emacs.git] / src / indent.h
blob5943f46bc8ee23cbe3fe56986bf3082d6aff782a
1 /* Definitions for interface to indent.c
2 Copyright (C) 1985, 1986, 2001, 2002, 2003, 2004,
3 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
10 any later version.
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
22 /* We introduce new member `tab_offset'. We need it because of the
23 existence of wide-column characters. There is a case that the
24 line-break occurs at a wide-column character and the number of
25 colums of the line gets less than width.
27 Example (where W_ stands for a wide-column character):
28 ----------
29 abcdefgh\\
31 ----------
33 To handle this case, we should not calculate the tab offset by
34 tab_offset += width;
36 Instead, we must remember tab_offset of the line.
40 struct position
42 EMACS_INT bufpos;
43 EMACS_INT bytepos;
44 EMACS_INT hpos;
45 EMACS_INT vpos;
46 EMACS_INT prevhpos;
47 EMACS_INT contin;
48 /* Number of characters we have already handled
49 from the before and after strings at this position. */
50 EMACS_INT ovstring_chars_done;
51 EMACS_INT tab_offset;
54 struct position *compute_motion P_ ((EMACS_INT from, EMACS_INT fromvpos,
55 EMACS_INT fromhpos, int did_motion,
56 EMACS_INT to, EMACS_INT tovpos,
57 EMACS_INT tohpos,
58 EMACS_INT width, EMACS_INT hscroll,
59 EMACS_INT tab_offset, struct window *));
60 struct position *vmotion P_ ((EMACS_INT from, EMACS_INT vtarget,
61 struct window *));
62 EMACS_INT skip_invisible P_ ((EMACS_INT pos, EMACS_INT *next_boundary_p,
63 EMACS_INT to, Lisp_Object window));
65 /* Value of point when current_column was called */
66 extern EMACS_INT last_known_column_point;
68 /* Functions for dealing with the column cache. */
70 /* Return true if the display table DISPTAB specifies the same widths
71 for characters as WIDTHTAB. We use this to decide when to
72 invalidate the buffer's column_cache. */
73 int disptab_matches_widthtab P_ ((struct Lisp_Char_Table *disptab,
74 struct Lisp_Vector *widthtab));
76 /* Recompute BUF's width table, using the display table DISPTAB. */
77 void recompute_width_table P_ ((struct buffer *buf,
78 struct Lisp_Char_Table *disptab));
81 /* arch-tag: f9feb373-5bff-4f4f-9198-94805d00cfd7
82 (do not change this comment) */