Commit | Line | Data |
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dcfdbac7 | 1 | /* GNU Emacs case conversion functions. |
0b5538bd | 2 | Copyright (C) 1985, 1994, 1997, 1998, 1999, 2001, 2002, 2003, 2004, |
4e6835db | 3 | 2005, 2006, 2007 Free Software Foundation, Inc. |
dcfdbac7 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
7c938215 | 9 | the Free Software Foundation; either version 2, or (at your option) |
dcfdbac7 JB |
10 | any later version. |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. */ | |
dcfdbac7 JB |
21 | |
22 | ||
18160b98 | 23 | #include <config.h> |
dcfdbac7 JB |
24 | #include "lisp.h" |
25 | #include "buffer.h" | |
a04538da | 26 | #include "charset.h" |
dcfdbac7 JB |
27 | #include "commands.h" |
28 | #include "syntax.h" | |
66da2880 | 29 | #include "composite.h" |
e35f6ff7 | 30 | #include "keymap.h" |
dcfdbac7 JB |
31 | |
32 | enum case_action {CASE_UP, CASE_DOWN, CASE_CAPITALIZE, CASE_CAPITALIZE_UP}; | |
a04538da KH |
33 | |
34 | Lisp_Object Qidentity; | |
dcfdbac7 JB |
35 | \f |
36 | Lisp_Object | |
37 | casify_object (flag, obj) | |
38 | enum case_action flag; | |
39 | Lisp_Object obj; | |
40 | { | |
41 | register int i, c, len; | |
42 | register int inword = flag == CASE_DOWN; | |
43 | ||
bd47bd35 RS |
44 | /* If the case table is flagged as modified, rescan it. */ |
45 | if (NILP (XCHAR_TABLE (current_buffer->downcase_table)->extras[1])) | |
46 | Fset_case_table (current_buffer->downcase_table); | |
47 | ||
4e374bf2 | 48 | if (INTEGERP (obj)) |
dcfdbac7 | 49 | { |
4e374bf2 KS |
50 | int flagbits = (CHAR_ALT | CHAR_SUPER | CHAR_HYPER |
51 | | CHAR_SHIFT | CHAR_CTL | CHAR_META); | |
52 | int flags = XINT (obj) & flagbits; | |
53 | ||
54 | /* If the character has higher bits set | |
55 | above the flags, return it unchanged. | |
56 | It is not a real character. */ | |
57 | if ((unsigned) XFASTINT (obj) > (unsigned) flagbits) | |
58 | return obj; | |
59 | ||
60 | c = DOWNCASE (XFASTINT (obj) & ~flagbits); | |
61 | if (inword) | |
62 | XSETFASTINT (obj, c | flags); | |
63 | else if (c == (XFASTINT (obj) & ~flagbits)) | |
dcfdbac7 | 64 | { |
4e374bf2 KS |
65 | c = UPCASE1 ((XFASTINT (obj) & ~flagbits)); |
66 | XSETFASTINT (obj, c | flags); | |
dcfdbac7 | 67 | } |
4e374bf2 KS |
68 | return obj; |
69 | } | |
5245463a | 70 | |
4e374bf2 KS |
71 | if (STRINGP (obj)) |
72 | { | |
73 | int multibyte = STRING_MULTIBYTE (obj); | |
74 | int n; | |
a0615d90 | 75 | |
4e374bf2 KS |
76 | obj = Fcopy_sequence (obj); |
77 | len = SBYTES (obj); | |
5245463a | 78 | |
4e374bf2 KS |
79 | /* I counts bytes, and N counts chars. */ |
80 | for (i = n = 0; i < len; n++) | |
81 | { | |
82 | int from_len = 1, to_len = 1; | |
83 | ||
84 | c = SREF (obj, i); | |
85 | ||
86 | if (multibyte && c >= 0x80) | |
87 | c = STRING_CHAR_AND_LENGTH (SDATA (obj) + i, len -i, from_len); | |
88 | if (inword && flag != CASE_CAPITALIZE_UP) | |
89 | c = DOWNCASE (c); | |
90 | else if (!UPPERCASEP (c) | |
91 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
92 | c = UPCASE1 (c); | |
93 | if ((ASCII_BYTE_P (c) && from_len == 1) | |
94 | || (! multibyte && SINGLE_BYTE_CHAR_P (c))) | |
95 | SSET (obj, i, c); | |
96 | else | |
dcfdbac7 | 97 | { |
4e374bf2 KS |
98 | to_len = CHAR_BYTES (c); |
99 | if (from_len == to_len) | |
100 | CHAR_STRING (c, SDATA (obj) + i); | |
f98a8aa9 | 101 | else |
a0615d90 | 102 | { |
4e374bf2 KS |
103 | Faset (obj, make_number (n), make_number (c)); |
104 | len += to_len - from_len; | |
a0615d90 | 105 | } |
a0615d90 | 106 | } |
4e374bf2 KS |
107 | if ((int) flag >= (int) CASE_CAPITALIZE) |
108 | inword = SYNTAX (c) == Sword; | |
109 | i += to_len; | |
dcfdbac7 | 110 | } |
4e374bf2 | 111 | return obj; |
dcfdbac7 | 112 | } |
4e374bf2 | 113 | |
ddc4cc77 | 114 | wrong_type_argument (Qchar_or_string_p, obj); |
dcfdbac7 JB |
115 | } |
116 | ||
117 | DEFUN ("upcase", Fupcase, Supcase, 1, 1, 0, | |
fdb82f93 PJ |
118 | doc: /* Convert argument to upper case and return that. |
119 | The argument may be a character or string. The result has the same type. | |
120 | The argument object is not altered--the value is a copy. | |
121 | See also `capitalize', `downcase' and `upcase-initials'. */) | |
122 | (obj) | |
dcfdbac7 JB |
123 | Lisp_Object obj; |
124 | { | |
125 | return casify_object (CASE_UP, obj); | |
126 | } | |
127 | ||
128 | DEFUN ("downcase", Fdowncase, Sdowncase, 1, 1, 0, | |
fdb82f93 PJ |
129 | doc: /* Convert argument to lower case and return that. |
130 | The argument may be a character or string. The result has the same type. | |
131 | The argument object is not altered--the value is a copy. */) | |
132 | (obj) | |
dcfdbac7 JB |
133 | Lisp_Object obj; |
134 | { | |
135 | return casify_object (CASE_DOWN, obj); | |
136 | } | |
137 | ||
138 | DEFUN ("capitalize", Fcapitalize, Scapitalize, 1, 1, 0, | |
fdb82f93 PJ |
139 | doc: /* Convert argument to capitalized form and return that. |
140 | This means that each word's first character is upper case | |
141 | and the rest is lower case. | |
142 | The argument may be a character or string. The result has the same type. | |
143 | The argument object is not altered--the value is a copy. */) | |
144 | (obj) | |
dcfdbac7 JB |
145 | Lisp_Object obj; |
146 | { | |
147 | return casify_object (CASE_CAPITALIZE, obj); | |
148 | } | |
96927ba4 | 149 | |
2371fad4 KH |
150 | /* Like Fcapitalize but change only the initials. */ |
151 | ||
8cef1f78 | 152 | DEFUN ("upcase-initials", Fupcase_initials, Supcase_initials, 1, 1, 0, |
fdb82f93 PJ |
153 | doc: /* Convert the initial of each word in the argument to upper case. |
154 | Do not change the other letters of each word. | |
155 | The argument may be a character or string. The result has the same type. | |
156 | The argument object is not altered--the value is a copy. */) | |
157 | (obj) | |
8cef1f78 RS |
158 | Lisp_Object obj; |
159 | { | |
160 | return casify_object (CASE_CAPITALIZE_UP, obj); | |
161 | } | |
dcfdbac7 JB |
162 | \f |
163 | /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP. | |
164 | b and e specify range of buffer to operate on. */ | |
165 | ||
dfcf069d | 166 | void |
dcfdbac7 JB |
167 | casify_region (flag, b, e) |
168 | enum case_action flag; | |
169 | Lisp_Object b, e; | |
170 | { | |
171 | register int i; | |
172 | register int c; | |
173 | register int inword = flag == CASE_DOWN; | |
a0615d90 | 174 | register int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
2371fad4 | 175 | int start, end; |
4c7b7eab | 176 | int start_byte, end_byte; |
66da2880 | 177 | int changed = 0; |
dcfdbac7 JB |
178 | |
179 | if (EQ (b, e)) | |
180 | /* Not modifying because nothing marked */ | |
181 | return; | |
182 | ||
bd47bd35 RS |
183 | /* If the case table is flagged as modified, rescan it. */ |
184 | if (NILP (XCHAR_TABLE (current_buffer->downcase_table)->extras[1])) | |
185 | Fset_case_table (current_buffer->downcase_table); | |
186 | ||
dcfdbac7 | 187 | validate_region (&b, &e); |
2371fad4 KH |
188 | start = XFASTINT (b); |
189 | end = XFASTINT (e); | |
3e145152 | 190 | modify_region (current_buffer, start, end, 0); |
2371fad4 | 191 | record_change (start, end - start); |
4c7b7eab RS |
192 | start_byte = CHAR_TO_BYTE (start); |
193 | end_byte = CHAR_TO_BYTE (end); | |
dcfdbac7 | 194 | |
66da2880 | 195 | for (i = start_byte; i < end_byte; i++, start++) |
a04538da | 196 | { |
66da2880 KH |
197 | int c2; |
198 | c = c2 = FETCH_BYTE (i); | |
a0615d90 KH |
199 | if (multibyte && c >= 0x80) |
200 | /* A multibyte character can't be handled in this simple loop. */ | |
201 | break; | |
202 | if (inword && flag != CASE_CAPITALIZE_UP) | |
203 | c = DOWNCASE (c); | |
204 | else if (!UPPERCASEP (c) | |
205 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
206 | c = UPCASE1 (c); | |
5d19ee8a RS |
207 | if (multibyte && c >= 0x80) |
208 | /* A multibyte result character can't be handled in this | |
209 | simple loop. */ | |
210 | break; | |
a0615d90 | 211 | FETCH_BYTE (i) = c; |
66da2880 KH |
212 | if (c != c2) |
213 | changed = 1; | |
a0615d90 | 214 | if ((int) flag >= (int) CASE_CAPITALIZE) |
cdeb3480 | 215 | inword = SYNTAX (c) == Sword && (inword || !SYNTAX_PREFIX (c)); |
a04538da | 216 | } |
4c7b7eab | 217 | if (i < end_byte) |
dcfdbac7 | 218 | { |
a0615d90 KH |
219 | /* The work is not yet finished because of a multibyte character |
220 | just encountered. */ | |
4c7b7eab RS |
221 | int opoint = PT; |
222 | int opoint_byte = PT_BYTE; | |
223 | int c2; | |
a04538da | 224 | |
f98a8aa9 | 225 | while (start < end) |
a04538da | 226 | { |
a0615d90 KH |
227 | if ((c = FETCH_BYTE (i)) >= 0x80) |
228 | c = FETCH_MULTIBYTE_CHAR (i); | |
229 | c2 = c; | |
a04538da | 230 | if (inword && flag != CASE_CAPITALIZE_UP) |
a0615d90 KH |
231 | c2 = DOWNCASE (c); |
232 | else if (!UPPERCASEP (c) | |
a04538da | 233 | && (!inword || flag != CASE_CAPITALIZE_UP)) |
a0615d90 KH |
234 | c2 = UPCASE1 (c); |
235 | if (c != c2) | |
a04538da KH |
236 | { |
237 | int fromlen, tolen, j; | |
66da2880 | 238 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
a04538da | 239 | |
66da2880 | 240 | changed = 1; |
a04538da | 241 | /* Handle the most likely case */ |
a0615d90 KH |
242 | if (c < 0400 && c2 < 0400) |
243 | FETCH_BYTE (i) = c2; | |
66da2880 KH |
244 | else if (fromlen = CHAR_STRING (c, str), |
245 | tolen = CHAR_STRING (c2, str), | |
a04538da KH |
246 | fromlen == tolen) |
247 | { | |
5d19ee8a | 248 | /* Length is unchanged. */ |
a04538da KH |
249 | for (j = 0; j < tolen; ++j) |
250 | FETCH_BYTE (i + j) = str[j]; | |
251 | } | |
252 | else | |
f98a8aa9 KH |
253 | { |
254 | /* Replace one character with the other, | |
255 | keeping text properties the same. */ | |
256 | replace_range_2 (start, i, | |
257 | start + 1, i + fromlen, | |
258 | str, 1, tolen, | |
259 | 1); | |
cc4ff429 KH |
260 | if (opoint > start) |
261 | opoint_byte += tolen - fromlen; | |
f98a8aa9 | 262 | } |
a04538da KH |
263 | } |
264 | if ((int) flag >= (int) CASE_CAPITALIZE) | |
a0615d90 | 265 | inword = SYNTAX (c2) == Sword; |
66da2880 | 266 | INC_BOTH (start, i); |
a04538da | 267 | } |
4c7b7eab | 268 | TEMP_SET_PT_BOTH (opoint, opoint_byte); |
dcfdbac7 JB |
269 | } |
270 | ||
66da2880 KH |
271 | start = XFASTINT (b); |
272 | if (changed) | |
273 | { | |
274 | signal_after_change (start, end - start, end - start); | |
275 | update_compositions (start, end, CHECK_ALL); | |
276 | } | |
dcfdbac7 JB |
277 | } |
278 | ||
279 | DEFUN ("upcase-region", Fupcase_region, Supcase_region, 2, 2, "r", | |
fdb82f93 PJ |
280 | doc: /* Convert the region to upper case. In programs, wants two arguments. |
281 | These arguments specify the starting and ending character numbers of | |
282 | the region to operate on. When used as a command, the text between | |
283 | point and the mark is operated on. | |
284 | See also `capitalize-region'. */) | |
285 | (beg, end) | |
8c22d56c | 286 | Lisp_Object beg, end; |
dcfdbac7 | 287 | { |
8c22d56c | 288 | casify_region (CASE_UP, beg, end); |
dcfdbac7 JB |
289 | return Qnil; |
290 | } | |
291 | ||
292 | DEFUN ("downcase-region", Fdowncase_region, Sdowncase_region, 2, 2, "r", | |
fdb82f93 PJ |
293 | doc: /* Convert the region to lower case. In programs, wants two arguments. |
294 | These arguments specify the starting and ending character numbers of | |
295 | the region to operate on. When used as a command, the text between | |
296 | point and the mark is operated on. */) | |
297 | (beg, end) | |
8c22d56c | 298 | Lisp_Object beg, end; |
dcfdbac7 | 299 | { |
8c22d56c | 300 | casify_region (CASE_DOWN, beg, end); |
dcfdbac7 JB |
301 | return Qnil; |
302 | } | |
303 | ||
304 | DEFUN ("capitalize-region", Fcapitalize_region, Scapitalize_region, 2, 2, "r", | |
fdb82f93 PJ |
305 | doc: /* Convert the region to capitalized form. |
306 | Capitalized form means each word's first character is upper case | |
307 | and the rest of it is lower case. | |
308 | In programs, give two arguments, the starting and ending | |
309 | character positions to operate on. */) | |
310 | (beg, end) | |
8c22d56c | 311 | Lisp_Object beg, end; |
dcfdbac7 | 312 | { |
8c22d56c | 313 | casify_region (CASE_CAPITALIZE, beg, end); |
dcfdbac7 JB |
314 | return Qnil; |
315 | } | |
316 | ||
2371fad4 KH |
317 | /* Like Fcapitalize_region but change only the initials. */ |
318 | ||
8cef1f78 RS |
319 | DEFUN ("upcase-initials-region", Fupcase_initials_region, |
320 | Supcase_initials_region, 2, 2, "r", | |
fdb82f93 PJ |
321 | doc: /* Upcase the initial of each word in the region. |
322 | Subsequent letters of each word are not changed. | |
323 | In programs, give two arguments, the starting and ending | |
324 | character positions to operate on. */) | |
325 | (beg, end) | |
8c22d56c | 326 | Lisp_Object beg, end; |
8cef1f78 | 327 | { |
8c22d56c | 328 | casify_region (CASE_CAPITALIZE_UP, beg, end); |
8cef1f78 RS |
329 | return Qnil; |
330 | } | |
dcfdbac7 JB |
331 | \f |
332 | Lisp_Object | |
34628a90 | 333 | operate_on_word (arg, newpoint) |
dcfdbac7 | 334 | Lisp_Object arg; |
34628a90 | 335 | int *newpoint; |
dcfdbac7 | 336 | { |
39fb55ff | 337 | Lisp_Object val; |
34628a90 | 338 | int farend; |
2371fad4 | 339 | int iarg; |
dcfdbac7 | 340 | |
b7826503 | 341 | CHECK_NUMBER (arg); |
2371fad4 | 342 | iarg = XINT (arg); |
6ec8bbd2 | 343 | farend = scan_words (PT, iarg); |
dcfdbac7 | 344 | if (!farend) |
2371fad4 | 345 | farend = iarg > 0 ? ZV : BEGV; |
dcfdbac7 | 346 | |
6ec8bbd2 | 347 | *newpoint = PT > farend ? PT : farend; |
18e23fd0 | 348 | XSETFASTINT (val, farend); |
dcfdbac7 JB |
349 | |
350 | return val; | |
351 | } | |
352 | ||
353 | DEFUN ("upcase-word", Fupcase_word, Supcase_word, 1, 1, "p", | |
fdb82f93 PJ |
354 | doc: /* Convert following word (or ARG words) to upper case, moving over. |
355 | With negative argument, convert previous words but do not move. | |
356 | See also `capitalize-word'. */) | |
357 | (arg) | |
dcfdbac7 JB |
358 | Lisp_Object arg; |
359 | { | |
34628a90 RS |
360 | Lisp_Object beg, end; |
361 | int newpoint; | |
6ec8bbd2 | 362 | XSETFASTINT (beg, PT); |
34628a90 RS |
363 | end = operate_on_word (arg, &newpoint); |
364 | casify_region (CASE_UP, beg, end); | |
365 | SET_PT (newpoint); | |
dcfdbac7 JB |
366 | return Qnil; |
367 | } | |
368 | ||
369 | DEFUN ("downcase-word", Fdowncase_word, Sdowncase_word, 1, 1, "p", | |
fdb82f93 PJ |
370 | doc: /* Convert following word (or ARG words) to lower case, moving over. |
371 | With negative argument, convert previous words but do not move. */) | |
372 | (arg) | |
dcfdbac7 JB |
373 | Lisp_Object arg; |
374 | { | |
34628a90 RS |
375 | Lisp_Object beg, end; |
376 | int newpoint; | |
6ec8bbd2 | 377 | XSETFASTINT (beg, PT); |
34628a90 RS |
378 | end = operate_on_word (arg, &newpoint); |
379 | casify_region (CASE_DOWN, beg, end); | |
380 | SET_PT (newpoint); | |
dcfdbac7 JB |
381 | return Qnil; |
382 | } | |
383 | ||
384 | DEFUN ("capitalize-word", Fcapitalize_word, Scapitalize_word, 1, 1, "p", | |
fdb82f93 PJ |
385 | doc: /* Capitalize the following word (or ARG words), moving over. |
386 | This gives the word(s) a first character in upper case | |
387 | and the rest lower case. | |
388 | With negative argument, capitalize previous words but do not move. */) | |
389 | (arg) | |
dcfdbac7 JB |
390 | Lisp_Object arg; |
391 | { | |
34628a90 RS |
392 | Lisp_Object beg, end; |
393 | int newpoint; | |
6ec8bbd2 | 394 | XSETFASTINT (beg, PT); |
34628a90 RS |
395 | end = operate_on_word (arg, &newpoint); |
396 | casify_region (CASE_CAPITALIZE, beg, end); | |
397 | SET_PT (newpoint); | |
dcfdbac7 JB |
398 | return Qnil; |
399 | } | |
400 | \f | |
dfcf069d | 401 | void |
dcfdbac7 JB |
402 | syms_of_casefiddle () |
403 | { | |
a04538da KH |
404 | Qidentity = intern ("identity"); |
405 | staticpro (&Qidentity); | |
dcfdbac7 JB |
406 | defsubr (&Supcase); |
407 | defsubr (&Sdowncase); | |
408 | defsubr (&Scapitalize); | |
8cef1f78 | 409 | defsubr (&Supcase_initials); |
dcfdbac7 JB |
410 | defsubr (&Supcase_region); |
411 | defsubr (&Sdowncase_region); | |
412 | defsubr (&Scapitalize_region); | |
8cef1f78 | 413 | defsubr (&Supcase_initials_region); |
dcfdbac7 JB |
414 | defsubr (&Supcase_word); |
415 | defsubr (&Sdowncase_word); | |
416 | defsubr (&Scapitalize_word); | |
417 | } | |
418 | ||
dfcf069d | 419 | void |
dcfdbac7 JB |
420 | keys_of_casefiddle () |
421 | { | |
422 | initial_define_key (control_x_map, Ctl('U'), "upcase-region"); | |
d427b66a | 423 | Fput (intern ("upcase-region"), Qdisabled, Qt); |
dcfdbac7 | 424 | initial_define_key (control_x_map, Ctl('L'), "downcase-region"); |
d427b66a JB |
425 | Fput (intern ("downcase-region"), Qdisabled, Qt); |
426 | ||
dcfdbac7 JB |
427 | initial_define_key (meta_map, 'u', "upcase-word"); |
428 | initial_define_key (meta_map, 'l', "downcase-word"); | |
429 | initial_define_key (meta_map, 'c', "capitalize-word"); | |
430 | } | |
ab5796a9 MB |
431 | |
432 | /* arch-tag: 60a73c66-5489-47e7-a81f-cead4057c526 | |
433 | (do not change this comment) */ |