Commit | Line | Data |
---|---|---|
d427b66a | 1 | /* Definitions for interface to indent.c |
acaf905b | 2 | Copyright (C) 1985-1986, 2001-2012 Free Software Foundation, Inc. |
d427b66a JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
b9b1cc14 | 6 | GNU Emacs is free software: you can redistribute it and/or modify |
d427b66a | 7 | it under the terms of the GNU General Public License as published by |
b9b1cc14 GM |
8 | the Free Software Foundation, either version 3 of the License, or |
9 | (at your option) any later version. | |
d427b66a JB |
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 | |
b9b1cc14 | 17 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
d427b66a | 18 | |
fafd594b KH |
19 | /* We introduce new member `tab_offset'. We need it because of the |
20 | existence of wide-column characters. There is a case that the | |
21 | line-break occurs at a wide-column character and the number of | |
da6062e6 | 22 | columns of the line gets less than width. |
fafd594b KH |
23 | |
24 | Example (where W_ stands for a wide-column character): | |
25 | ---------- | |
26 | abcdefgh\\ | |
177c0ea7 | 27 | W_ |
fafd594b KH |
28 | ---------- |
29 | ||
177c0ea7 | 30 | To handle this case, we should not calculate the tab offset by |
fafd594b KH |
31 | tab_offset += width; |
32 | ||
177c0ea7 | 33 | Instead, we must remember tab_offset of the line. |
fafd594b KH |
34 | |
35 | */ | |
d427b66a JB |
36 | |
37 | struct position | |
38 | { | |
83155776 SM |
39 | EMACS_INT bufpos; |
40 | EMACS_INT bytepos; | |
41 | EMACS_INT hpos; | |
42 | EMACS_INT vpos; | |
43 | EMACS_INT prevhpos; | |
44 | EMACS_INT contin; | |
cf5db374 RS |
45 | /* Number of characters we have already handled |
46 | from the before and after strings at this position. */ | |
83155776 SM |
47 | EMACS_INT ovstring_chars_done; |
48 | EMACS_INT tab_offset; | |
d427b66a JB |
49 | }; |
50 | ||
383e0970 J |
51 | struct position *compute_motion (EMACS_INT from, EMACS_INT fromvpos, |
52 | EMACS_INT fromhpos, int did_motion, | |
53 | EMACS_INT to, EMACS_INT tovpos, | |
54 | EMACS_INT tohpos, | |
55 | EMACS_INT width, EMACS_INT hscroll, | |
56 | EMACS_INT tab_offset, struct window *); | |
57 | struct position *vmotion (EMACS_INT from, EMACS_INT vtarget, | |
58 | struct window *); | |
59 | EMACS_INT skip_invisible (EMACS_INT pos, EMACS_INT *next_boundary_p, | |
60 | EMACS_INT to, Lisp_Object window); | |
d427b66a JB |
61 | |
62 | /* Value of point when current_column was called */ | |
83155776 | 63 | extern EMACS_INT last_known_column_point; |
63dec5bd JB |
64 | |
65 | /* Functions for dealing with the column cache. */ | |
66 | ||
e0f24100 | 67 | /* Return true if the display table DISPTAB specifies the same widths |
63dec5bd JB |
68 | for characters as WIDTHTAB. We use this to decide when to |
69 | invalidate the buffer's column_cache. */ | |
383e0970 J |
70 | int disptab_matches_widthtab (struct Lisp_Char_Table *disptab, |
71 | struct Lisp_Vector *widthtab); | |
63dec5bd JB |
72 | |
73 | /* Recompute BUF's width table, using the display table DISPTAB. */ | |
383e0970 J |
74 | void recompute_width_table (struct buffer *buf, |
75 | struct Lisp_Char_Table *disptab); |