Merge from mainline.
[emacs.git] / src / indent.h
blob4d9dbf2d7ff54de894d80363f881a589bb95618d
1 /* Definitions for interface to indent.c
2 Copyright (C) 1985, 1986, 2001, 2002, 2003, 2004,
3 2005, 2006, 2007, 2008, 2009, 2010 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 of the License, or
10 (at your option) 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. If not, see <http://www.gnu.org/licenses/>. */
20 /* We introduce new member `tab_offset'. We need it because of the
21 existence of wide-column characters. There is a case that the
22 line-break occurs at a wide-column character and the number of
23 colums of the line gets less than width.
25 Example (where W_ stands for a wide-column character):
26 ----------
27 abcdefgh\\
29 ----------
31 To handle this case, we should not calculate the tab offset by
32 tab_offset += width;
34 Instead, we must remember tab_offset of the line.
38 struct position
40 EMACS_INT bufpos;
41 EMACS_INT bytepos;
42 EMACS_INT hpos;
43 EMACS_INT vpos;
44 EMACS_INT prevhpos;
45 EMACS_INT contin;
46 /* Number of characters we have already handled
47 from the before and after strings at this position. */
48 EMACS_INT ovstring_chars_done;
49 EMACS_INT tab_offset;
52 struct position *compute_motion P_ ((EMACS_INT from, EMACS_INT fromvpos,
53 EMACS_INT fromhpos, int did_motion,
54 EMACS_INT to, EMACS_INT tovpos,
55 EMACS_INT tohpos,
56 EMACS_INT width, EMACS_INT hscroll,
57 EMACS_INT tab_offset, struct window *));
58 struct position *vmotion P_ ((EMACS_INT from, EMACS_INT vtarget,
59 struct window *));
60 EMACS_INT skip_invisible P_ ((EMACS_INT pos, EMACS_INT *next_boundary_p,
61 EMACS_INT to, Lisp_Object window));
63 /* Value of point when current_column was called */
64 extern EMACS_INT last_known_column_point;
66 /* Functions for dealing with the column cache. */
68 /* Return true if the display table DISPTAB specifies the same widths
69 for characters as WIDTHTAB. We use this to decide when to
70 invalidate the buffer's column_cache. */
71 int disptab_matches_widthtab P_ ((struct Lisp_Char_Table *disptab,
72 struct Lisp_Vector *widthtab));
74 /* Recompute BUF's width table, using the display table DISPTAB. */
75 void recompute_width_table P_ ((struct buffer *buf,
76 struct Lisp_Char_Table *disptab));
79 /* arch-tag: f9feb373-5bff-4f4f-9198-94805d00cfd7
80 (do not change this comment) */