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78 lines
2.8 KiB
C
78 lines
2.8 KiB
C
/* Definitions for interface to indent.c
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Copyright (C) 1985-1986, 2001-2011 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
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/* We introduce new member `tab_offset'. We need it because of the
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existence of wide-column characters. There is a case that the
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line-break occurs at a wide-column character and the number of
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colums of the line gets less than width.
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Example (where W_ stands for a wide-column character):
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----------
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abcdefgh\\
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W_
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----------
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To handle this case, we should not calculate the tab offset by
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tab_offset += width;
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Instead, we must remember tab_offset of the line.
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*/
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struct position
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{
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EMACS_INT bufpos;
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EMACS_INT bytepos;
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EMACS_INT hpos;
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EMACS_INT vpos;
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EMACS_INT prevhpos;
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EMACS_INT contin;
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/* Number of characters we have already handled
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from the before and after strings at this position. */
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EMACS_INT ovstring_chars_done;
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EMACS_INT tab_offset;
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};
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struct position *compute_motion (EMACS_INT from, EMACS_INT fromvpos,
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EMACS_INT fromhpos, int did_motion,
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EMACS_INT to, EMACS_INT tovpos,
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EMACS_INT tohpos,
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EMACS_INT width, EMACS_INT hscroll,
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EMACS_INT tab_offset, struct window *);
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struct position *vmotion (EMACS_INT from, EMACS_INT vtarget,
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struct window *);
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EMACS_INT skip_invisible (EMACS_INT pos, EMACS_INT *next_boundary_p,
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EMACS_INT to, Lisp_Object window);
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/* Value of point when current_column was called */
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extern EMACS_INT last_known_column_point;
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/* Functions for dealing with the column cache. */
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/* Return true if the display table DISPTAB specifies the same widths
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for characters as WIDTHTAB. We use this to decide when to
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invalidate the buffer's column_cache. */
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int disptab_matches_widthtab (struct Lisp_Char_Table *disptab,
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struct Lisp_Vector *widthtab);
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/* Recompute BUF's width table, using the display table DISPTAB. */
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void recompute_width_table (struct buffer *buf,
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struct Lisp_Char_Table *disptab);
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