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4ed46869 | 1 | /* GNU Emacs routines to deal with category tables. |
95df8112 | 2 | |
acaf905b | 3 | Copyright (C) 1998, 2001-2012 Free Software Foundation, Inc. |
95df8112 GM |
4 | Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
5 | 2005, 2006, 2007, 2008, 2009, 2010, 2011 | |
6 | National Institute of Advanced Industrial Science and Technology (AIST) | |
7 | Registration Number H14PRO021 | |
8 | Copyright (C) 2003 | |
9 | National Institute of Advanced Industrial Science and Technology (AIST) | |
10 | Registration Number H13PRO009 | |
4ed46869 KH |
11 | |
12 | This file is part of GNU Emacs. | |
13 | ||
9ec0b715 | 14 | GNU Emacs is free software: you can redistribute it and/or modify |
4ed46869 | 15 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
16 | the Free Software Foundation, either version 3 of the License, or |
17 | (at your option) any later version. | |
4ed46869 KH |
18 | |
19 | GNU Emacs is distributed in the hope that it will be useful, | |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
23 | ||
24 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 25 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
4ed46869 KH |
26 | |
27 | ||
28 | /* Here we handle three objects: category, category set, and category | |
29 | table. Read comments in the file category.h to understand them. */ | |
30 | ||
31 | #include <config.h> | |
32 | #include <ctype.h> | |
d7306fe6 | 33 | #include <setjmp.h> |
4ed46869 KH |
34 | #include "lisp.h" |
35 | #include "buffer.h" | |
ea012abd | 36 | #include "character.h" |
4ed46869 KH |
37 | #include "charset.h" |
38 | #include "category.h" | |
e35f6ff7 | 39 | #include "keymap.h" |
4ed46869 KH |
40 | |
41 | /* The version number of the latest category table. Each category | |
42 | table has a unique version number. It is assigned a new number | |
43 | also when it is modified. When a regular expression is compiled | |
44 | into the struct re_pattern_buffer, the version number of the | |
45 | category table (of the current buffer) at that moment is also | |
46 | embedded in the structure. | |
47 | ||
48 | For the moment, we are not using this feature. */ | |
49 | static int category_table_version; | |
50 | ||
955cbe7b | 51 | static Lisp_Object Qcategory_table, Qcategoryp, Qcategorysetp, Qcategory_table_p; |
4ed46869 | 52 | |
4ed46869 KH |
53 | /* Temporary internal variable used in macro CHAR_HAS_CATEGORY. */ |
54 | Lisp_Object _temp_category_set; | |
55 | ||
d85b608f PE |
56 | /* Make CATEGORY_SET includes (if VAL is t) or excludes (if VAL is |
57 | nil) CATEGORY. */ | |
58 | #define SET_CATEGORY_SET(category_set, category, val) \ | |
59 | set_category_set (category_set, category, val) | |
60 | static void set_category_set (Lisp_Object, Lisp_Object, Lisp_Object); | |
4ed46869 KH |
61 | \f |
62 | /* Category set staff. */ | |
63 | ||
f57e2426 | 64 | static Lisp_Object hash_get_category_set (Lisp_Object, Lisp_Object); |
cd486875 KH |
65 | |
66 | static Lisp_Object | |
971de7fb | 67 | hash_get_category_set (Lisp_Object table, Lisp_Object category_set) |
cd486875 | 68 | { |
cd486875 | 69 | struct Lisp_Hash_Table *h; |
d3411f89 | 70 | ptrdiff_t i; |
0de4bb68 | 71 | EMACS_UINT hash; |
cd486875 KH |
72 | |
73 | if (NILP (XCHAR_TABLE (table)->extras[1])) | |
74 | XCHAR_TABLE (table)->extras[1] | |
75 | = make_hash_table (Qequal, make_number (DEFAULT_HASH_SIZE), | |
76 | make_float (DEFAULT_REHASH_SIZE), | |
77 | make_float (DEFAULT_REHASH_THRESHOLD), | |
78 | Qnil, Qnil, Qnil); | |
79 | h = XHASH_TABLE (XCHAR_TABLE (table)->extras[1]); | |
80 | i = hash_lookup (h, category_set, &hash); | |
81 | if (i >= 0) | |
82 | return HASH_KEY (h, i); | |
83 | hash_put (h, category_set, Qnil, hash); | |
84 | return category_set; | |
85 | } | |
86 | ||
87 | ||
4ed46869 | 88 | DEFUN ("make-category-set", Fmake_category_set, Smake_category_set, 1, 1, 0, |
fdb82f93 PJ |
89 | doc: /* Return a newly created category-set which contains CATEGORIES. |
90 | CATEGORIES is a string of category mnemonics. | |
91 | The value is a bool-vector which has t at the indices corresponding to | |
92 | those categories. */) | |
5842a27b | 93 | (Lisp_Object categories) |
4ed46869 KH |
94 | { |
95 | Lisp_Object val; | |
96 | int len; | |
97 | ||
b7826503 | 98 | CHECK_STRING (categories); |
4ed46869 KH |
99 | val = MAKE_CATEGORY_SET; |
100 | ||
115afec3 | 101 | if (STRING_MULTIBYTE (categories)) |
95030461 | 102 | error ("Multibyte string in `make-category-set'"); |
115afec3 | 103 | |
d5db4077 | 104 | len = SCHARS (categories); |
4ed46869 KH |
105 | while (--len >= 0) |
106 | { | |
15c60737 | 107 | Lisp_Object category; |
4ed46869 | 108 | |
d5db4077 | 109 | XSETFASTINT (category, SREF (categories, len)); |
b7826503 | 110 | CHECK_CATEGORY (category); |
4ed46869 KH |
111 | SET_CATEGORY_SET (val, category, Qt); |
112 | } | |
113 | return val; | |
114 | } | |
115 | ||
116 | \f | |
117 | /* Category staff. */ | |
118 | ||
d85b608f | 119 | static Lisp_Object check_category_table (Lisp_Object table); |
4ed46869 KH |
120 | |
121 | DEFUN ("define-category", Fdefine_category, Sdefine_category, 2, 3, 0, | |
839966f3 KH |
122 | doc: /* Define CATEGORY as a category which is described by DOCSTRING. |
123 | CATEGORY should be an ASCII printing character in the range ` ' to `~'. | |
f6d2f045 KH |
124 | DOCSTRING is the documentation string of the category. The first line |
125 | should be a terse text (preferably less than 16 characters), | |
126 | and the rest lines should be the full description. | |
fdb82f93 | 127 | The category is defined only in category table TABLE, which defaults to |
839966f3 | 128 | the current buffer's category table. */) |
5842a27b | 129 | (Lisp_Object category, Lisp_Object docstring, Lisp_Object table) |
4ed46869 | 130 | { |
b7826503 PJ |
131 | CHECK_CATEGORY (category); |
132 | CHECK_STRING (docstring); | |
4ed46869 KH |
133 | table = check_category_table (table); |
134 | ||
135 | if (!NILP (CATEGORY_DOCSTRING (table, XFASTINT (category)))) | |
5fdb398c | 136 | error ("Category `%c' is already defined", (int) XFASTINT (category)); |
905a9ed3 DN |
137 | if (!NILP (Vpurify_flag)) |
138 | docstring = Fpurecopy (docstring); | |
4ed46869 KH |
139 | CATEGORY_DOCSTRING (table, XFASTINT (category)) = docstring; |
140 | ||
141 | return Qnil; | |
142 | } | |
143 | ||
144 | DEFUN ("category-docstring", Fcategory_docstring, Scategory_docstring, 1, 2, 0, | |
839966f3 KH |
145 | doc: /* Return the documentation string of CATEGORY, as defined in TABLE. |
146 | TABLE should be a category table and defaults to the current buffer's | |
147 | category table. */) | |
5842a27b | 148 | (Lisp_Object category, Lisp_Object table) |
4ed46869 | 149 | { |
b7826503 | 150 | CHECK_CATEGORY (category); |
4ed46869 KH |
151 | table = check_category_table (table); |
152 | ||
153 | return CATEGORY_DOCSTRING (table, XFASTINT (category)); | |
154 | } | |
155 | ||
156 | DEFUN ("get-unused-category", Fget_unused_category, Sget_unused_category, | |
157 | 0, 1, 0, | |
839966f3 | 158 | doc: /* Return a category which is not yet defined in TABLE. |
0b6694a5 | 159 | If no category remains available, return nil. |
839966f3 | 160 | The optional argument TABLE specifies which category table to modify; |
0b6694a5 | 161 | it defaults to the current buffer's category table. */) |
5842a27b | 162 | (Lisp_Object table) |
4ed46869 KH |
163 | { |
164 | int i; | |
4ed46869 KH |
165 | |
166 | table = check_category_table (table); | |
167 | ||
168 | for (i = ' '; i <= '~'; i++) | |
169 | if (NILP (CATEGORY_DOCSTRING (table, i))) | |
170 | return make_number (i); | |
171 | ||
172 | return Qnil; | |
173 | } | |
174 | ||
175 | \f | |
176 | /* Category-table staff. */ | |
177 | ||
178 | DEFUN ("category-table-p", Fcategory_table_p, Scategory_table_p, 1, 1, 0, | |
fdb82f93 | 179 | doc: /* Return t if ARG is a category table. */) |
5842a27b | 180 | (Lisp_Object arg) |
4ed46869 KH |
181 | { |
182 | if (CHAR_TABLE_P (arg) | |
ed8ec86d | 183 | && EQ (XCHAR_TABLE (arg)->purpose, Qcategory_table)) |
4ed46869 KH |
184 | return Qt; |
185 | return Qnil; | |
186 | } | |
187 | ||
188 | /* If TABLE is nil, return the current category table. If TABLE is | |
189 | not nil, check the validity of TABLE as a category table. If | |
190 | valid, return TABLE itself, but if not valid, signal an error of | |
191 | wrong-type-argument. */ | |
192 | ||
d85b608f | 193 | static Lisp_Object |
971de7fb | 194 | check_category_table (Lisp_Object table) |
4ed46869 | 195 | { |
4ed46869 | 196 | if (NILP (table)) |
4b4deea2 | 197 | return BVAR (current_buffer, category_table); |
88674269 | 198 | CHECK_TYPE (!NILP (Fcategory_table_p (table)), Qcategory_table_p, table); |
4ed46869 | 199 | return table; |
177c0ea7 | 200 | } |
4ed46869 KH |
201 | |
202 | DEFUN ("category-table", Fcategory_table, Scategory_table, 0, 0, 0, | |
fdb82f93 PJ |
203 | doc: /* Return the current category table. |
204 | This is the one specified by the current buffer. */) | |
5842a27b | 205 | (void) |
4ed46869 | 206 | { |
4b4deea2 | 207 | return BVAR (current_buffer, category_table); |
4ed46869 KH |
208 | } |
209 | ||
210 | DEFUN ("standard-category-table", Fstandard_category_table, | |
211 | Sstandard_category_table, 0, 0, 0, | |
fdb82f93 PJ |
212 | doc: /* Return the standard category table. |
213 | This is the one used for new buffers. */) | |
5842a27b | 214 | (void) |
4ed46869 KH |
215 | { |
216 | return Vstandard_category_table; | |
217 | } | |
218 | ||
ea012abd KH |
219 | |
220 | static void | |
971de7fb | 221 | copy_category_entry (Lisp_Object table, Lisp_Object c, Lisp_Object val) |
ea012abd | 222 | { |
f4b670ef | 223 | val = Fcopy_sequence (val); |
8f924df7 KH |
224 | if (CONSP (c)) |
225 | char_table_set_range (table, XINT (XCAR (c)), XINT (XCDR (c)), val); | |
f4b670ef | 226 | else |
8f924df7 | 227 | char_table_set (table, XINT (c), val); |
ea012abd KH |
228 | } |
229 | ||
4ed46869 KH |
230 | /* Return a copy of category table TABLE. We can't simply use the |
231 | function copy-sequence because no contents should be shared between | |
ed8ec86d | 232 | the original and the copy. This function is called recursively by |
9da95d53 | 233 | binding TABLE to a sub char table. */ |
4ed46869 | 234 | |
9f3b5e69 | 235 | static Lisp_Object |
971de7fb | 236 | copy_category_table (Lisp_Object table) |
4ed46869 | 237 | { |
ea012abd | 238 | table = copy_char_table (table); |
4ed46869 | 239 | |
ea012abd KH |
240 | if (! NILP (XCHAR_TABLE (table)->defalt)) |
241 | XCHAR_TABLE (table)->defalt | |
242 | = Fcopy_sequence (XCHAR_TABLE (table)->defalt); | |
243 | XCHAR_TABLE (table)->extras[0] | |
244 | = Fcopy_sequence (XCHAR_TABLE (table)->extras[0]); | |
8f924df7 | 245 | map_char_table (copy_category_entry, Qnil, table, table); |
ed8ec86d | 246 | |
4ed46869 KH |
247 | return table; |
248 | } | |
249 | ||
250 | DEFUN ("copy-category-table", Fcopy_category_table, Scopy_category_table, | |
251 | 0, 1, 0, | |
fdb82f93 PJ |
252 | doc: /* Construct a new category table and return it. |
253 | It is a copy of the TABLE, which defaults to the standard category table. */) | |
5842a27b | 254 | (Lisp_Object table) |
4ed46869 KH |
255 | { |
256 | if (!NILP (table)) | |
257 | check_category_table (table); | |
258 | else | |
259 | table = Vstandard_category_table; | |
260 | ||
9da95d53 | 261 | return copy_category_table (table); |
4ed46869 KH |
262 | } |
263 | ||
70414a3d KH |
264 | DEFUN ("make-category-table", Fmake_category_table, Smake_category_table, |
265 | 0, 0, 0, | |
fdb82f93 | 266 | doc: /* Construct a new and empty category table and return it. */) |
5842a27b | 267 | (void) |
70414a3d KH |
268 | { |
269 | Lisp_Object val; | |
ea012abd | 270 | int i; |
70414a3d KH |
271 | |
272 | val = Fmake_char_table (Qcategory_table, Qnil); | |
273 | XCHAR_TABLE (val)->defalt = MAKE_CATEGORY_SET; | |
8f924df7 | 274 | for (i = 0; i < (1 << CHARTAB_SIZE_BITS_0); i++) |
ea012abd | 275 | XCHAR_TABLE (val)->contents[i] = MAKE_CATEGORY_SET; |
70414a3d KH |
276 | Fset_char_table_extra_slot (val, make_number (0), |
277 | Fmake_vector (make_number (95), Qnil)); | |
278 | return val; | |
279 | } | |
280 | ||
4ed46869 | 281 | DEFUN ("set-category-table", Fset_category_table, Sset_category_table, 1, 1, 0, |
839966f3 KH |
282 | doc: /* Specify TABLE as the category table for the current buffer. |
283 | Return TABLE. */) | |
5842a27b | 284 | (Lisp_Object table) |
4ed46869 | 285 | { |
6f598a6d | 286 | int idx; |
4ed46869 | 287 | table = check_category_table (table); |
4b4deea2 | 288 | BVAR (current_buffer, category_table) = table; |
4ed46869 | 289 | /* Indicate that this buffer now has a specified category table. */ |
f6cd0527 GM |
290 | idx = PER_BUFFER_VAR_IDX (category_table); |
291 | SET_PER_BUFFER_VALUE_P (current_buffer, idx, 1); | |
4ed46869 KH |
292 | return table; |
293 | } | |
294 | ||
295 | \f | |
ea012abd | 296 | Lisp_Object |
971de7fb | 297 | char_category_set (int c) |
ea012abd | 298 | { |
4b4deea2 | 299 | return CHAR_TABLE_REF (BVAR (current_buffer, category_table), c); |
ea012abd KH |
300 | } |
301 | ||
4ed46869 | 302 | DEFUN ("char-category-set", Fchar_category_set, Schar_category_set, 1, 1, 0, |
a2c2f196 JB |
303 | doc: /* Return the category set of CHAR. |
304 | usage: (char-category-set CHAR) */) | |
5842a27b | 305 | (Lisp_Object ch) |
4ed46869 | 306 | { |
b7826503 | 307 | CHECK_NUMBER (ch); |
4ed46869 KH |
308 | return CATEGORY_SET (XFASTINT (ch)); |
309 | } | |
310 | ||
311 | DEFUN ("category-set-mnemonics", Fcategory_set_mnemonics, | |
312 | Scategory_set_mnemonics, 1, 1, 0, | |
fdb82f93 PJ |
313 | doc: /* Return a string containing mnemonics of the categories in CATEGORY-SET. |
314 | CATEGORY-SET is a bool-vector, and the categories \"in\" it are those | |
839966f3 | 315 | that are indexes where t occurs in the bool-vector. |
fdb82f93 | 316 | The return value is a string containing those same categories. */) |
5842a27b | 317 | (Lisp_Object category_set) |
4ed46869 KH |
318 | { |
319 | int i, j; | |
320 | char str[96]; | |
321 | ||
b7826503 | 322 | CHECK_CATEGORY_SET (category_set); |
4ed46869 KH |
323 | |
324 | j = 0; | |
325 | for (i = 32; i < 127; i++) | |
326 | if (CATEGORY_MEMBER (i, category_set)) | |
327 | str[j++] = i; | |
328 | str[j] = '\0'; | |
329 | ||
330 | return build_string (str); | |
331 | } | |
332 | ||
d85b608f | 333 | static void |
971de7fb | 334 | set_category_set (Lisp_Object category_set, Lisp_Object category, Lisp_Object val) |
4ed46869 KH |
335 | { |
336 | do { | |
337 | int idx = XINT (category) / 8; | |
338 | unsigned char bits = 1 << (XINT (category) % 8); | |
339 | ||
340 | if (NILP (val)) | |
341 | XCATEGORY_SET (category_set)->data[idx] &= ~bits; | |
342 | else | |
343 | XCATEGORY_SET (category_set)->data[idx] |= bits; | |
344 | } while (0); | |
345 | } | |
346 | ||
347 | DEFUN ("modify-category-entry", Fmodify_category_entry, | |
348 | Smodify_category_entry, 2, 4, 0, | |
fdb82f93 PJ |
349 | doc: /* Modify the category set of CHARACTER by adding CATEGORY to it. |
350 | The category is changed only for table TABLE, which defaults to | |
8f7e5042 DL |
351 | the current buffer's category table. |
352 | CHARACTER can be either a single character or a cons representing the | |
353 | lower and upper ends of an inclusive character range to modify. | |
fdb82f93 PJ |
354 | If optional fourth argument RESET is non-nil, |
355 | then delete CATEGORY from the category set instead of adding it. */) | |
5842a27b | 356 | (Lisp_Object character, Lisp_Object category, Lisp_Object table, Lisp_Object reset) |
4ed46869 | 357 | { |
4ed46869 | 358 | Lisp_Object set_value; /* Actual value to be set in category sets. */ |
8f7e5042 | 359 | Lisp_Object category_set; |
ea012abd KH |
360 | int start, end; |
361 | int from, to; | |
4ed46869 | 362 | |
ea012abd | 363 | if (INTEGERP (character)) |
4ed46869 | 364 | { |
ea012abd KH |
365 | CHECK_CHARACTER (character); |
366 | start = end = XFASTINT (character); | |
4ed46869 | 367 | } |
ea012abd | 368 | else |
4ed46869 | 369 | { |
ea012abd | 370 | CHECK_CONS (character); |
8f924df7 KH |
371 | CHECK_CHARACTER_CAR (character); |
372 | CHECK_CHARACTER_CDR (character); | |
ea012abd KH |
373 | start = XFASTINT (XCAR (character)); |
374 | end = XFASTINT (XCDR (character)); | |
4ed46869 | 375 | } |
4ed46869 | 376 | |
b7826503 | 377 | CHECK_CATEGORY (category); |
4ed46869 | 378 | table = check_category_table (table); |
4ed46869 | 379 | |
4ed46869 | 380 | if (NILP (CATEGORY_DOCSTRING (table, XFASTINT (category)))) |
5fdb398c | 381 | error ("Undefined category: %c", (int) XFASTINT (category)); |
4ed46869 | 382 | |
4ed46869 | 383 | set_value = NILP (reset) ? Qt : Qnil; |
4ed46869 | 384 | |
ea012abd | 385 | while (start <= end) |
4ed46869 | 386 | { |
cd486875 | 387 | from = start, to = end; |
ea012abd | 388 | category_set = char_table_ref_and_range (table, start, &from, &to); |
0b261f59 | 389 | if (CATEGORY_MEMBER (XFASTINT (category), category_set) != NILP (reset)) |
ea012abd | 390 | { |
d8887a31 KH |
391 | category_set = Fcopy_sequence (category_set); |
392 | SET_CATEGORY_SET (category_set, category, set_value); | |
cd486875 KH |
393 | category_set = hash_get_category_set (table, category_set); |
394 | char_table_set_range (table, start, to, category_set); | |
ea012abd | 395 | } |
ea012abd | 396 | start = to + 1; |
4ed46869 | 397 | } |
4ed46869 KH |
398 | |
399 | return Qnil; | |
400 | } | |
401 | \f | |
4ed46869 KH |
402 | /* Return 1 if there is a word boundary between two word-constituent |
403 | characters C1 and C2 if they appear in this order, else return 0. | |
404 | Use the macro WORD_BOUNDARY_P instead of calling this function | |
405 | directly. */ | |
406 | ||
407 | int | |
971de7fb | 408 | word_boundary_p (int c1, int c2) |
4ed46869 KH |
409 | { |
410 | Lisp_Object category_set1, category_set2; | |
411 | Lisp_Object tail; | |
412 | int default_result; | |
413 | ||
714b2198 KH |
414 | if (EQ (CHAR_TABLE_REF (Vchar_script_table, c1), |
415 | CHAR_TABLE_REF (Vchar_script_table, c2))) | |
4ed46869 KH |
416 | { |
417 | tail = Vword_separating_categories; | |
418 | default_result = 0; | |
419 | } | |
420 | else | |
421 | { | |
422 | tail = Vword_combining_categories; | |
423 | default_result = 1; | |
424 | } | |
425 | ||
426 | category_set1 = CATEGORY_SET (c1); | |
427 | if (NILP (category_set1)) | |
428 | return default_result; | |
429 | category_set2 = CATEGORY_SET (c2); | |
430 | if (NILP (category_set2)) | |
431 | return default_result; | |
432 | ||
03699b14 | 433 | for (; CONSP (tail); tail = XCDR (tail)) |
4ed46869 | 434 | { |
03699b14 | 435 | Lisp_Object elt = XCAR (tail); |
4ed46869 KH |
436 | |
437 | if (CONSP (elt) | |
714b2198 KH |
438 | && (NILP (XCAR (elt)) |
439 | || (CATEGORYP (XCAR (elt)) | |
8a605fe8 KH |
440 | && CATEGORY_MEMBER (XFASTINT (XCAR (elt)), category_set1) |
441 | && ! CATEGORY_MEMBER (XFASTINT (XCAR (elt)), category_set2))) | |
714b2198 KH |
442 | && (NILP (XCDR (elt)) |
443 | || (CATEGORYP (XCDR (elt)) | |
8a605fe8 | 444 | && ! CATEGORY_MEMBER (XFASTINT (XCDR (elt)), category_set1) |
714b2198 | 445 | && CATEGORY_MEMBER (XFASTINT (XCDR (elt)), category_set2)))) |
4ed46869 KH |
446 | return !default_result; |
447 | } | |
448 | return default_result; | |
449 | } | |
450 | ||
451 | \f | |
dfcf069d | 452 | void |
971de7fb | 453 | init_category_once (void) |
4ed46869 KH |
454 | { |
455 | /* This has to be done here, before we call Fmake_char_table. */ | |
cd3520a4 | 456 | DEFSYM (Qcategory_table, "category-table"); |
4ed46869 KH |
457 | |
458 | /* Intern this now in case it isn't already done. | |
459 | Setting this variable twice is harmless. | |
460 | But don't staticpro it here--that is done in alloc.c. */ | |
d67b4f80 | 461 | Qchar_table_extra_slots = intern_c_string ("char-table-extra-slots"); |
4ed46869 KH |
462 | |
463 | /* Now we are ready to set up this property, so we can | |
464 | create category tables. */ | |
465 | Fput (Qcategory_table, Qchar_table_extra_slots, make_number (2)); | |
466 | ||
467 | Vstandard_category_table = Fmake_char_table (Qcategory_table, Qnil); | |
177c0ea7 | 468 | /* Set a category set which contains nothing to the default. */ |
4ed46869 | 469 | XCHAR_TABLE (Vstandard_category_table)->defalt = MAKE_CATEGORY_SET; |
9da95d53 | 470 | Fset_char_table_extra_slot (Vstandard_category_table, make_number (0), |
4ed46869 KH |
471 | Fmake_vector (make_number (95), Qnil)); |
472 | } | |
473 | ||
dfcf069d | 474 | void |
971de7fb | 475 | syms_of_category (void) |
4ed46869 | 476 | { |
cd3520a4 JB |
477 | DEFSYM (Qcategoryp, "categoryp"); |
478 | DEFSYM (Qcategorysetp, "categorysetp"); | |
479 | DEFSYM (Qcategory_table_p, "category-table-p"); | |
4ed46869 | 480 | |
29208e82 | 481 | DEFVAR_LISP ("word-combining-categories", Vword_combining_categories, |
fdb82f93 PJ |
482 | doc: /* List of pair (cons) of categories to determine word boundary. |
483 | ||
484 | Emacs treats a sequence of word constituent characters as a single | |
e0f24100 | 485 | word (i.e. finds no word boundary between them) only if they belong to |
714b2198 | 486 | the same script. But, exceptions are allowed in the following cases. |
fdb82f93 | 487 | |
714b2198 | 488 | \(1) The case that characters are in different scripts is controlled |
fdb82f93 PJ |
489 | by the variable `word-combining-categories'. |
490 | ||
714b2198 | 491 | Emacs finds no word boundary between characters of different scripts |
fdb82f93 PJ |
492 | if they have categories matching some element of this list. |
493 | ||
494 | More precisely, if an element of this list is a cons of category CAT1 | |
495 | and CAT2, and a multibyte character C1 which has CAT1 is followed by | |
496 | C2 which has CAT2, there's no word boundary between C1 and C2. | |
497 | ||
714b2198 KH |
498 | For instance, to tell that Han characters followed by Hiragana |
499 | characters can form a single word, the element `(?C . ?H)' should be | |
500 | in this list. | |
fdb82f93 | 501 | |
714b2198 | 502 | \(2) The case that character are in the same script is controlled by |
fdb82f93 PJ |
503 | the variable `word-separating-categories'. |
504 | ||
ecdcaa09 | 505 | Emacs finds a word boundary between characters of the same script |
fdb82f93 PJ |
506 | if they have categories matching some element of this list. |
507 | ||
508 | More precisely, if an element of this list is a cons of category CAT1 | |
8a605fe8 KH |
509 | and CAT2, and a multibyte character C1 which has CAT1 but not CAT2 is |
510 | followed by C2 which has CAT2 but not CAT1, there's a word boundary | |
511 | between C1 and C2. | |
fdb82f93 | 512 | |
714b2198 KH |
513 | For instance, to tell that there's a word boundary between Hiragana |
514 | and Katakana (both are in the same script `kana'), | |
515 | the element `(?H . ?K) should be in this list. */); | |
4ed46869 KH |
516 | |
517 | Vword_combining_categories = Qnil; | |
518 | ||
29208e82 | 519 | DEFVAR_LISP ("word-separating-categories", Vword_separating_categories, |
fdb82f93 PJ |
520 | doc: /* List of pair (cons) of categories to determine word boundary. |
521 | See the documentation of the variable `word-combining-categories'. */); | |
4ed46869 KH |
522 | |
523 | Vword_separating_categories = Qnil; | |
524 | ||
525 | defsubr (&Smake_category_set); | |
526 | defsubr (&Sdefine_category); | |
527 | defsubr (&Scategory_docstring); | |
528 | defsubr (&Sget_unused_category); | |
529 | defsubr (&Scategory_table_p); | |
530 | defsubr (&Scategory_table); | |
531 | defsubr (&Sstandard_category_table); | |
532 | defsubr (&Scopy_category_table); | |
70414a3d | 533 | defsubr (&Smake_category_table); |
4ed46869 KH |
534 | defsubr (&Sset_category_table); |
535 | defsubr (&Schar_category_set); | |
536 | defsubr (&Scategory_set_mnemonics); | |
537 | defsubr (&Smodify_category_entry); | |
4ed46869 KH |
538 | |
539 | category_table_version = 0; | |
540 | } |