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d427b66a JB |
1 | /* Definitions for interface to indent.c |
2 | Copyright (C) 1985, 1986 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
7c938215 | 8 | the Free Software Foundation; either version 2, or (at your option) |
d427b66a JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
d427b66a | 20 | |
fafd594b KH |
21 | /* We introduce new member `tab_offset'. We need it because of the |
22 | existence of wide-column characters. There is a case that the | |
23 | line-break occurs at a wide-column character and the number of | |
24 | colums of the line gets less than width. | |
25 | ||
26 | Example (where W_ stands for a wide-column character): | |
27 | ---------- | |
28 | abcdefgh\\ | |
29 | W_ | |
30 | ---------- | |
31 | ||
32 | To handle this case, we should not calculate the tab offset by | |
33 | tab_offset += width; | |
34 | ||
35 | Instead, we must remember tab_offset of the line. | |
36 | ||
37 | */ | |
d427b66a JB |
38 | |
39 | struct position | |
40 | { | |
41 | int bufpos; | |
42 | int hpos; | |
43 | int vpos; | |
44 | int prevhpos; | |
45 | int contin; | |
cf5db374 RS |
46 | /* Number of characters we have already handled |
47 | from the before and after strings at this position. */ | |
48 | int ovstring_chars_done; | |
fafd594b | 49 | int tab_offset; |
d427b66a JB |
50 | }; |
51 | ||
52 | struct position *compute_motion (); | |
53 | struct position *vmotion (); | |
54 | ||
55 | /* Value of point when current_column was called */ | |
56 | extern int last_known_column_point; | |
63dec5bd JB |
57 | |
58 | /* Functions for dealing with the column cache. */ | |
59 | ||
60 | /* Return true iff the display table DISPTAB specifies the same widths | |
61 | for characters as WIDTHTAB. We use this to decide when to | |
62 | invalidate the buffer's column_cache. */ | |
63 | extern int disptab_matches_widthtab ( /* struct Lisp_Vector *disptab, | |
64 | struct Lisp_Vector *widthtab */ ); | |
65 | ||
66 | /* Recompute BUF's width table, using the display table DISPTAB. */ | |
67 | extern void recompute_width_table ( /* struct buffer *buf, | |
68 | struct Lisp_Vector *disptab */ ); |