1 /* Definitions for interface to indent.c
2 Copyright (C) 1985-1986, 2001-2023 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
8 the Free Software Foundation, either version 3 of the License, or (at
9 your option) 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. If not, see <https://www.gnu.org/licenses/>. */
18
19 #ifndef EMACS_INDENT_H
20 #define EMACS_INDENT_H
21
22 #include "lisp.h"
23
24 struct position
25 {
26 ptrdiff_t bufpos;
27 ptrdiff_t bytepos;
28 EMACS_INT hpos;
29 EMACS_INT vpos;
30 EMACS_INT prevhpos;
31 int contin;
32 };
33
34 struct position *compute_motion (ptrdiff_t from, ptrdiff_t frombyte,
35 EMACS_INT fromvpos, EMACS_INT fromhpos,
36 bool did_motion, ptrdiff_t to,
37 EMACS_INT tovpos, EMACS_INT tohpos,
38 EMACS_INT width, ptrdiff_t hscroll,
39 int tab_offset, struct window *);
40 struct position *vmotion (ptrdiff_t from, ptrdiff_t from_byte,
41 EMACS_INT vtarget, struct window *);
42 ptrdiff_t skip_invisible (ptrdiff_t pos, ptrdiff_t *next_boundary_p,
43 ptrdiff_t to, Lisp_Object window);
44
45 /* Value of point when current_column was called */
46 extern ptrdiff_t last_known_column_point;
47
48 /* Functions for dealing with the column cache. */
49
50 /* Return true if the display table DISPTAB specifies the same widths
51 for characters as WIDTHTAB. We use this to decide when to
52 invalidate the buffer's column_cache. */
53 bool disptab_matches_widthtab (struct Lisp_Char_Table *disptab,
54 struct Lisp_Vector *widthtab);
55
56 /* Recompute BUF's width table, using the display table DISPTAB. */
57 void recompute_width_table (struct buffer *buf,
58 struct Lisp_Char_Table *disptab);
59
60 #endif /* EMACS_INDENT_H */