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comparison src/bufslots.h @ 428:3ecd8885ac67 r21-2-22

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Import from CVS: tag r21-2-22
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date Mon, 13 Aug 2007 11:28:15 +0200
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1 /* Definitions of marked slots in buffers
2 Copyright (C) 1990, 1992, 1993 Free Software Foundation, Inc.
3
4 This file is part of XEmacs.
5
6 XEmacs is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
9 later version.
10
11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21 /* Synched up with: Mule 2.0, FSF 19.30. Split out of buffer.h. */
22
23 /* Authorship:
24
25 FSF: long ago (part of buffer.h).
26 JWZ: separated out from buffer.h, early in Lemacs.
27 XEmacs: a few other changes.
28 */
29
30 /* In the declaration of the buffer structure, this file is included
31 after defining MARKED_SLOT(x) to be Lisp_Object x; i.e. just a slot
32 definition. In the garbage collector this file is included after
33 defining MARKED_SLOT(x) to be mark_object(buffer->x). */
34
35 #ifndef BUFFER_SLOTS_FIRST_NAME
36 #define BUFFER_SLOTS_FIRST_NAME name
37 #endif
38
39 /* The name of this buffer. */
40 MARKED_SLOT (name);
41
42 /* The name of the file visited in this buffer, or nil. */
43 MARKED_SLOT (filename);
44
45 /* Dir for expanding relative file names. */
46 MARKED_SLOT (directory);
47
48 /* True iff this buffer has been backed up (if you write to the
49 visited file and it hasn't been backed up, then a backup will
50 be made). */
51 /* #### This isn't really used by the C code, so could be deleted. */
52 MARKED_SLOT (backed_up);
53
54 /* Length of file when last read or saved.
55 This is not in the struct buffer_text
56 because it's not used in indirect buffers at all. */
57 MARKED_SLOT (saved_size);
58
59 /* File name used for auto-saving this buffer.
60 This is not in the struct buffer_text
61 because it's not used in indirect buffers at all. */
62 MARKED_SLOT (auto_save_file_name);
63
64 /* Non-nil if buffer read-only. */
65 MARKED_SLOT (read_only);
66
67 /* "The mark". This is a marker which may
68 point into this buffer or may point nowhere. */
69 MARKED_SLOT (mark);
70
71 /* Alist of elements (SYMBOL . VALUE-IN-THIS-BUFFER)
72 for all per-buffer variables of this buffer.
73 Specifically, this lists those variables that have
74 a buffer-local value in this buffer: i.e. those
75 whose value does not shadow the default value.
76 (Remember that for any particular variable created
77 with `make-local-variable' or `make-variable-buffer-local',
78 it will have a per-buffer value in some buffers and a
79 default value in others.)
80
81 Variables declared in C with DEFVAR_BUFFER_LOCAL() (i.e.
82 those stored in the struct buffer) are not listed here. */
83 MARKED_SLOT (local_var_alist);
84
85 /* Symbol naming major mode (eg, lisp-mode). */
86 MARKED_SLOT (major_mode);
87
88 /* Pretty name of major mode (eg, "Lisp"). */
89 MARKED_SLOT (mode_name);
90
91 /* Modeline element that controls format of modeline. */
92 MARKED_SLOT (modeline_format);
93
94 /* Keys that are bound local to this buffer. */
95 MARKED_SLOT (keymap);
96
97 /* This buffer's local abbrev table. */
98 MARKED_SLOT (abbrev_table);
99 /* This buffer's syntax table. */
100 MARKED_SLOT (syntax_table);
101 /* Massaged values from the syntax table, for faster lookup. */
102 MARKED_SLOT (mirror_syntax_table);
103
104 #ifdef MULE
105 /* This buffer's category table. */
106 MARKED_SLOT (category_table);
107 #endif /* MULE */
108 #ifdef FILE_CODING
109 /* This buffer's coding system. */
110 MARKED_SLOT (buffer_file_coding_system);
111 #endif
112 /* Values of several buffer-local variables.
113
114 tab-width is buffer-local so that redisplay can find it
115 in buffers that are not current */
116 MARKED_SLOT (case_fold_search);
117 MARKED_SLOT (tab_width);
118 MARKED_SLOT (fill_column);
119 MARKED_SLOT (left_margin);
120
121 /* Function to call when insert space past fill column. */
122 MARKED_SLOT (auto_fill_function);
123
124 /* Case table for case-conversion in this buffer.
125 This char-table maps each char into its lower-case version. */
126 MARKED_SLOT (downcase_table);
127 /* Char-table mapping each char to its upper-case version. */
128 MARKED_SLOT (upcase_table);
129
130 /* Char-table for conversion for case-folding search. */
131 MARKED_SLOT (case_canon_table);
132 /* Char-table of equivalences for case-folding search. */
133 MARKED_SLOT (case_eqv_table);
134
135 #ifdef MULE
136 /* #### The purpose of these bogos is to deal with the fact that
137 the Boyer-Moore and regex searching routines don't know how to
138 deal with translating multi-byte characters. Fixing this is hard,
139 so instead we maintain these mirror tables that have all incorrect
140 mappings (see casetab.c) sanitized out of them. If we don't do
141 this, we may get weird and unpredictable results in the presence
142 of extended chars and extended mappings, and it could even lead
143 to a crash.
144
145 #### Eventually we should deal with this properly. */
146 MARKED_SLOT (mirror_downcase_table);
147 MARKED_SLOT (mirror_upcase_table);
148 MARKED_SLOT (mirror_case_canon_table);
149 MARKED_SLOT (mirror_case_eqv_table);
150 #endif
151
152 /* #### This ought to be a specifier: */
153 /* Non-nil means do not display continuation lines. */
154 MARKED_SLOT (truncate_lines);
155 /* #### This ought to be a specifier: */
156 /* #### Better yet, it ought to be junked. It really sucks. */
157 /* Non-nil means display ctl chars with uparrow. */
158 MARKED_SLOT (ctl_arrow);
159 /* #### This ought to be a specifier: */
160 /* #### Better yet, it ought to be junked. It really sucks. */
161 /* Non-nil means do selective display;
162 see doc string in syms_of_buffer (buffer.c) for details. */
163 MARKED_SLOT (selective_display);
164 /* #### This ought to be a specifier: */
165 /* #### Better yet, it ought to be junked. It really sucks. */
166 /* Non-nil means show ... at end of line followed by invisible lines. */
167 MARKED_SLOT (selective_display_ellipses);
168 /* Alist of (FUNCTION . STRING) for each minor mode enabled in buffer. */
169 /* Unused: MARKED_SLOT (minor_modes); */
170 /* t if "self-insertion" should overwrite */
171 MARKED_SLOT (overwrite_mode);
172 /* non-nil means abbrev mode is on. Expand abbrevs automatically. */
173 MARKED_SLOT (abbrev_mode);
174
175 /* No display table here. It's a specifier. */
176 #if 0 /* FSFmacs */
177 /* t means the mark and region are currently active. */
178 MARKED_SLOT (mark_active);
179 #endif
180
181 /* Changes in the buffer are recorded here for undo.
182 t means don't record anything.
183 This information belongs to the base buffer of an indirect buffer,
184 But we can't store it in the struct buffer_text
185 because local variables have to be right in the struct buffer.
186 So we copy it around in set_buffer_internal. */
187 MARKED_SLOT (undo_list);
188
189 /* FSFmacs has overlay stuff here. We have extent info elsewhere in the
190 struct buffer. */
191
192 /* If dedicated_frame is non-nil, display_buffer tries to use it instead
193 of the current frame */
194 MARKED_SLOT (dedicated_frame);
195
196 /* Lisp of symbols naming the file format used for visited file. */
197 MARKED_SLOT (file_format);
198
199 #ifdef REGION_CACHE_NEEDS_WORK
200 /* True if the newline position cache and width run cache are
201 enabled. See search.c and indent.c. */
202 MARKED_SLOT (cache_long_line_scans);
203
204 /* If the width run cache is enabled, this table contains the
205 character widths width_run_cache (see above) assumes. When we
206 do a thorough redisplay, we compare this against the buffer's
207 current display table to see whether the display table has
208 affected the widths of any characters. If it has, we
209 invalidate the width run cache, and re-initialize width_table. */
210 MARKED_SLOT (width_table);
211 #endif /* REGION_CACHE_NEEDS_WORK */
212
213 /* A redundant copy of text.pt, in the form of a marker. Every time one
214 is updated, so is the other.
215 */
216 MARKED_SLOT (point_marker);
217
218 /* FSFmacs has pt_marker, begv_marker, zv_marker here, used for
219 indirect buffers. We don't need them because we handle these
220 values directly instead of playing games with markers. */
221
222 /* This holds the point value before the last scroll operation.
223 Explicitly setting point sets this to nil. */
224 MARKED_SLOT (point_before_scroll);
225
226 /* Truename of the visited file (via the realpath() system call),
227 or nil. */
228 MARKED_SLOT (file_truename);
229
230 /* Invisibility spec of this buffer.
231 t => any non-nil `invisible' property means invisible.
232 A list => `invisible' property means invisible
233 if it is memq in that list. */
234 MARKED_SLOT (invisibility_spec);
235
236 /* The string generated by formatting the modeline in this buffer. */
237 MARKED_SLOT (generated_modeline_string);
238
239 /* A hash table that maps from a "generic extent" (an extent in
240 `modeline-format') into a buffer-specific extent. */
241 MARKED_SLOT (modeline_extent_table);
242
243 #ifndef BUFFER_SLOTS_LAST_NAME
244 #define BUFFER_SLOTS_LAST_NAME modeline_extent_table
245 #endif
246
247 #if 0 /* FSFmacs */
248 /* This is silly and stupid */
249 /* These are so we don't have to recompile everything
250 the next few times we add a new slot. */
251 MARKED_SLOT (extra1, extra2, extra3);
252 #endif