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, |
8cabe764 | 3 | 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
dcfdbac7 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
dcfdbac7 | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
dcfdbac7 JB |
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 | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
dcfdbac7 JB |
19 | |
20 | ||
18160b98 | 21 | #include <config.h> |
dcfdbac7 JB |
22 | #include "lisp.h" |
23 | #include "buffer.h" | |
83be827a | 24 | #include "character.h" |
dcfdbac7 JB |
25 | #include "commands.h" |
26 | #include "syntax.h" | |
66da2880 | 27 | #include "composite.h" |
e35f6ff7 | 28 | #include "keymap.h" |
dcfdbac7 JB |
29 | |
30 | enum case_action {CASE_UP, CASE_DOWN, CASE_CAPITALIZE, CASE_CAPITALIZE_UP}; | |
a04538da KH |
31 | |
32 | Lisp_Object Qidentity; | |
dcfdbac7 JB |
33 | \f |
34 | Lisp_Object | |
35 | casify_object (flag, obj) | |
36 | enum case_action flag; | |
37 | Lisp_Object obj; | |
38 | { | |
2422e50a | 39 | register int c, c1; |
dcfdbac7 JB |
40 | register int inword = flag == CASE_DOWN; |
41 | ||
bd47bd35 RS |
42 | /* If the case table is flagged as modified, rescan it. */ |
43 | if (NILP (XCHAR_TABLE (current_buffer->downcase_table)->extras[1])) | |
44 | Fset_case_table (current_buffer->downcase_table); | |
45 | ||
0d64f689 | 46 | if (INTEGERP (obj)) |
dcfdbac7 | 47 | { |
0d64f689 KH |
48 | int flagbits = (CHAR_ALT | CHAR_SUPER | CHAR_HYPER |
49 | | CHAR_SHIFT | CHAR_CTL | CHAR_META); | |
50 | int flags = XINT (obj) & flagbits; | |
51 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); | |
52 | ||
53 | /* If the character has higher bits set | |
54 | above the flags, return it unchanged. | |
55 | It is not a real character. */ | |
56 | if ((unsigned) XFASTINT (obj) > (unsigned) flagbits) | |
57 | return obj; | |
58 | ||
59 | c1 = XFASTINT (obj) & ~flagbits; | |
60 | if (! multibyte) | |
61 | MAKE_CHAR_MULTIBYTE (c1); | |
62 | c = DOWNCASE (c1); | |
63 | if (inword) | |
64 | XSETFASTINT (obj, c | flags); | |
65 | else if (c == (XFASTINT (obj) & ~flagbits)) | |
dcfdbac7 | 66 | { |
0d64f689 KH |
67 | if (! inword) |
68 | c = UPCASE1 (c1); | |
2422e50a | 69 | if (! multibyte) |
0d64f689 KH |
70 | MAKE_CHAR_UNIBYTE (c); |
71 | XSETFASTINT (obj, c | flags); | |
dcfdbac7 | 72 | } |
0d64f689 KH |
73 | return obj; |
74 | } | |
5245463a | 75 | |
438eba3c SM |
76 | if (!STRINGP (obj)) |
77 | wrong_type_argument (Qchar_or_string_p, obj); | |
78 | else if (!STRING_MULTIBYTE (obj)) | |
0d64f689 | 79 | { |
438eba3c SM |
80 | EMACS_INT i; |
81 | EMACS_INT size = SCHARS (obj); | |
a0615d90 | 82 | |
0d64f689 | 83 | obj = Fcopy_sequence (obj); |
438eba3c | 84 | for (i = 0; i < size; i++) |
0d64f689 | 85 | { |
438eba3c | 86 | c = SREF (obj, i); |
0d64f689 | 87 | MAKE_CHAR_MULTIBYTE (c); |
0d64f689 KH |
88 | c1 = c; |
89 | if (inword && flag != CASE_CAPITALIZE_UP) | |
90 | c = DOWNCASE (c); | |
91 | else if (!UPPERCASEP (c) | |
92 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
93 | c = UPCASE1 (c1); | |
94 | if ((int) flag >= (int) CASE_CAPITALIZE) | |
95 | inword = (SYNTAX (c) == Sword); | |
96 | if (c != c1) | |
97 | { | |
0d64f689 | 98 | MAKE_CHAR_UNIBYTE (c); |
438eba3c SM |
99 | /* If the char can't be converted to a valid byte, just don't |
100 | change it. */ | |
101 | if (c >= 0 && c < 256) | |
102 | SSET (obj, i, c); | |
103 | } | |
104 | } | |
105 | return obj; | |
994b75e0 SM |
106 | } |
107 | else | |
108 | { | |
109 | EMACS_INT i, i_byte, size = SCHARS (obj); | |
110 | int len; | |
438eba3c SM |
111 | USE_SAFE_ALLOCA; |
112 | unsigned char *dst, *o; | |
113 | /* Over-allocate by 12%: this is a minor overhead, but should be | |
114 | sufficient in 99.999% of the cases to avoid a reallocation. */ | |
115 | EMACS_INT o_size = SBYTES (obj) + SBYTES (obj) / 8 + MAX_MULTIBYTE_LENGTH; | |
116 | SAFE_ALLOCA (dst, void *, o_size); | |
117 | o = dst; | |
118 | ||
119 | for (i = i_byte = 0; i < size; i++, i_byte += len) | |
120 | { | |
121 | if ((o - dst) + MAX_MULTIBYTE_LENGTH > o_size) | |
122 | { /* Not enough space for the next char: grow the destination. */ | |
123 | unsigned char *old_dst = dst; | |
124 | o_size += o_size; /* Probably overkill, but extremely rare. */ | |
125 | SAFE_ALLOCA (dst, void *, o_size); | |
126 | bcopy (old_dst, dst, o - old_dst); | |
127 | o = dst + (o - old_dst); | |
a0615d90 | 128 | } |
438eba3c SM |
129 | c = STRING_CHAR_AND_LENGTH (SDATA (obj) + i_byte, 0, len); |
130 | if (inword && flag != CASE_CAPITALIZE_UP) | |
131 | c = DOWNCASE (c); | |
132 | else if (!UPPERCASEP (c) | |
133 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
134 | c = UPCASE1 (c); | |
135 | if ((int) flag >= (int) CASE_CAPITALIZE) | |
136 | inword = (SYNTAX (c) == Sword); | |
137 | o += CHAR_STRING (c, o); | |
dcfdbac7 | 138 | } |
438eba3c SM |
139 | eassert (o - dst <= o_size); |
140 | obj = make_multibyte_string (dst, size, o - dst); | |
141 | SAFE_FREE (); | |
0d64f689 | 142 | return obj; |
dcfdbac7 JB |
143 | } |
144 | } | |
145 | ||
146 | DEFUN ("upcase", Fupcase, Supcase, 1, 1, 0, | |
fdb82f93 PJ |
147 | doc: /* Convert argument to upper case and return that. |
148 | The argument may be a character or string. The result has the same type. | |
149 | The argument object is not altered--the value is a copy. | |
150 | See also `capitalize', `downcase' and `upcase-initials'. */) | |
151 | (obj) | |
dcfdbac7 JB |
152 | Lisp_Object obj; |
153 | { | |
154 | return casify_object (CASE_UP, obj); | |
155 | } | |
156 | ||
157 | DEFUN ("downcase", Fdowncase, Sdowncase, 1, 1, 0, | |
fdb82f93 PJ |
158 | doc: /* Convert argument to lower case and return that. |
159 | The argument may be a character or string. The result has the same type. | |
160 | The argument object is not altered--the value is a copy. */) | |
161 | (obj) | |
dcfdbac7 JB |
162 | Lisp_Object obj; |
163 | { | |
164 | return casify_object (CASE_DOWN, obj); | |
165 | } | |
166 | ||
167 | DEFUN ("capitalize", Fcapitalize, Scapitalize, 1, 1, 0, | |
fdb82f93 PJ |
168 | doc: /* Convert argument to capitalized form and return that. |
169 | This means that each word's first character is upper case | |
170 | and the rest is lower case. | |
171 | The argument may be a character or string. The result has the same type. | |
172 | The argument object is not altered--the value is a copy. */) | |
173 | (obj) | |
dcfdbac7 JB |
174 | Lisp_Object obj; |
175 | { | |
176 | return casify_object (CASE_CAPITALIZE, obj); | |
177 | } | |
96927ba4 | 178 | |
2371fad4 KH |
179 | /* Like Fcapitalize but change only the initials. */ |
180 | ||
8cef1f78 | 181 | DEFUN ("upcase-initials", Fupcase_initials, Supcase_initials, 1, 1, 0, |
fdb82f93 PJ |
182 | doc: /* Convert the initial of each word in the argument to upper case. |
183 | Do not change the other letters of each word. | |
184 | The argument may be a character or string. The result has the same type. | |
185 | The argument object is not altered--the value is a copy. */) | |
186 | (obj) | |
8cef1f78 RS |
187 | Lisp_Object obj; |
188 | { | |
189 | return casify_object (CASE_CAPITALIZE_UP, obj); | |
190 | } | |
dcfdbac7 JB |
191 | \f |
192 | /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP. | |
193 | b and e specify range of buffer to operate on. */ | |
194 | ||
dfcf069d | 195 | void |
dcfdbac7 JB |
196 | casify_region (flag, b, e) |
197 | enum case_action flag; | |
198 | Lisp_Object b, e; | |
199 | { | |
dcfdbac7 JB |
200 | register int c; |
201 | register int inword = flag == CASE_DOWN; | |
a0615d90 | 202 | register int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
7927d8e3 SM |
203 | EMACS_INT start, end; |
204 | EMACS_INT start_byte, end_byte; | |
205 | EMACS_INT first = -1, last; /* Position of first and last changes. */ | |
206 | EMACS_INT opoint = PT; | |
207 | EMACS_INT opoint_byte = PT_BYTE; | |
dcfdbac7 JB |
208 | |
209 | if (EQ (b, e)) | |
210 | /* Not modifying because nothing marked */ | |
211 | return; | |
212 | ||
bd47bd35 RS |
213 | /* If the case table is flagged as modified, rescan it. */ |
214 | if (NILP (XCHAR_TABLE (current_buffer->downcase_table)->extras[1])) | |
215 | Fset_case_table (current_buffer->downcase_table); | |
216 | ||
dcfdbac7 | 217 | validate_region (&b, &e); |
2371fad4 KH |
218 | start = XFASTINT (b); |
219 | end = XFASTINT (e); | |
3e145152 | 220 | modify_region (current_buffer, start, end, 0); |
2371fad4 | 221 | record_change (start, end - start); |
4c7b7eab RS |
222 | start_byte = CHAR_TO_BYTE (start); |
223 | end_byte = CHAR_TO_BYTE (end); | |
dcfdbac7 | 224 | |
2422e50a | 225 | while (start < end) |
a04538da | 226 | { |
2422e50a KH |
227 | int c2, len; |
228 | ||
229 | if (multibyte) | |
230 | { | |
231 | c = FETCH_MULTIBYTE_CHAR (start_byte); | |
232 | len = CHAR_BYTES (c); | |
233 | } | |
234 | else | |
235 | { | |
236 | c = FETCH_BYTE (start_byte); | |
237 | MAKE_CHAR_MULTIBYTE (c); | |
238 | len = 1; | |
239 | } | |
240 | c2 = c; | |
a0615d90 KH |
241 | if (inword && flag != CASE_CAPITALIZE_UP) |
242 | c = DOWNCASE (c); | |
243 | else if (!UPPERCASEP (c) | |
244 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
245 | c = UPCASE1 (c); | |
a0615d90 | 246 | if ((int) flag >= (int) CASE_CAPITALIZE) |
8f924df7 | 247 | inword = ((SYNTAX (c) == Sword) && (inword || !SYNTAX_PREFIX (c))); |
2422e50a | 248 | if (c != c2) |
a04538da | 249 | { |
7927d8e3 SM |
250 | last = start; |
251 | if (first < 0) | |
252 | first = start; | |
253 | ||
2422e50a KH |
254 | if (! multibyte) |
255 | { | |
256 | MAKE_CHAR_UNIBYTE (c); | |
257 | FETCH_BYTE (start_byte) = c; | |
258 | } | |
259 | else if (ASCII_CHAR_P (c2) && ASCII_CHAR_P (c)) | |
260 | FETCH_BYTE (start_byte) = c; | |
08588bfa | 261 | else |
a04538da | 262 | { |
08588bfa | 263 | int tolen = CHAR_BYTES (c); |
2422e50a | 264 | int j; |
66da2880 | 265 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
a04538da | 266 | |
2422e50a | 267 | CHAR_STRING (c, str); |
08588bfa KH |
268 | if (len == tolen) |
269 | { | |
270 | /* Length is unchanged. */ | |
271 | for (j = 0; j < len; ++j) | |
272 | FETCH_BYTE (start_byte + j) = str[j]; | |
273 | } | |
274 | else | |
275 | { | |
276 | /* Replace one character with the other, | |
277 | keeping text properties the same. */ | |
278 | replace_range_2 (start, start_byte, | |
279 | start + 1, start_byte + len, | |
280 | str, 1, tolen, | |
281 | 0); | |
282 | len = tolen; | |
283 | } | |
a04538da | 284 | } |
a04538da | 285 | } |
2422e50a KH |
286 | start++; |
287 | start_byte += len; | |
dcfdbac7 JB |
288 | } |
289 | ||
8f924df7 KH |
290 | if (PT != opoint) |
291 | TEMP_SET_PT_BOTH (opoint, opoint_byte); | |
292 | ||
7927d8e3 | 293 | if (first >= 0) |
66da2880 | 294 | { |
7927d8e3 SM |
295 | signal_after_change (first, last + 1 - first, last + 1 - first); |
296 | update_compositions (first, last + 1, CHECK_ALL); | |
66da2880 | 297 | } |
dcfdbac7 JB |
298 | } |
299 | ||
300 | DEFUN ("upcase-region", Fupcase_region, Supcase_region, 2, 2, "r", | |
fdb82f93 PJ |
301 | doc: /* Convert the region to upper case. In programs, wants two arguments. |
302 | These arguments specify the starting and ending character numbers of | |
303 | the region to operate on. When used as a command, the text between | |
304 | point and the mark is operated on. | |
305 | See also `capitalize-region'. */) | |
306 | (beg, end) | |
8c22d56c | 307 | Lisp_Object beg, end; |
dcfdbac7 | 308 | { |
8c22d56c | 309 | casify_region (CASE_UP, beg, end); |
dcfdbac7 JB |
310 | return Qnil; |
311 | } | |
312 | ||
313 | DEFUN ("downcase-region", Fdowncase_region, Sdowncase_region, 2, 2, "r", | |
fdb82f93 PJ |
314 | doc: /* Convert the region to lower case. In programs, wants two arguments. |
315 | These arguments specify the starting and ending character numbers of | |
316 | the region to operate on. When used as a command, the text between | |
317 | point and the mark is operated on. */) | |
318 | (beg, end) | |
8c22d56c | 319 | Lisp_Object beg, end; |
dcfdbac7 | 320 | { |
8c22d56c | 321 | casify_region (CASE_DOWN, beg, end); |
dcfdbac7 JB |
322 | return Qnil; |
323 | } | |
324 | ||
325 | DEFUN ("capitalize-region", Fcapitalize_region, Scapitalize_region, 2, 2, "r", | |
fdb82f93 PJ |
326 | doc: /* Convert the region to capitalized form. |
327 | Capitalized form means each word's first character is upper case | |
328 | and the rest of it is lower case. | |
329 | In programs, give two arguments, the starting and ending | |
330 | character positions to operate on. */) | |
331 | (beg, end) | |
8c22d56c | 332 | Lisp_Object beg, end; |
dcfdbac7 | 333 | { |
8c22d56c | 334 | casify_region (CASE_CAPITALIZE, beg, end); |
dcfdbac7 JB |
335 | return Qnil; |
336 | } | |
337 | ||
2371fad4 KH |
338 | /* Like Fcapitalize_region but change only the initials. */ |
339 | ||
8cef1f78 RS |
340 | DEFUN ("upcase-initials-region", Fupcase_initials_region, |
341 | Supcase_initials_region, 2, 2, "r", | |
fdb82f93 PJ |
342 | doc: /* Upcase the initial of each word in the region. |
343 | Subsequent letters of each word are not changed. | |
344 | In programs, give two arguments, the starting and ending | |
345 | character positions to operate on. */) | |
346 | (beg, end) | |
8c22d56c | 347 | Lisp_Object beg, end; |
8cef1f78 | 348 | { |
8c22d56c | 349 | casify_region (CASE_CAPITALIZE_UP, beg, end); |
8cef1f78 RS |
350 | return Qnil; |
351 | } | |
dcfdbac7 | 352 | \f |
438eba3c | 353 | static Lisp_Object |
34628a90 | 354 | operate_on_word (arg, newpoint) |
dcfdbac7 | 355 | Lisp_Object arg; |
438eba3c | 356 | EMACS_INT *newpoint; |
dcfdbac7 | 357 | { |
39fb55ff | 358 | Lisp_Object val; |
34628a90 | 359 | int farend; |
2371fad4 | 360 | int iarg; |
dcfdbac7 | 361 | |
b7826503 | 362 | CHECK_NUMBER (arg); |
2371fad4 | 363 | iarg = XINT (arg); |
6ec8bbd2 | 364 | farend = scan_words (PT, iarg); |
dcfdbac7 | 365 | if (!farend) |
2371fad4 | 366 | farend = iarg > 0 ? ZV : BEGV; |
dcfdbac7 | 367 | |
6ec8bbd2 | 368 | *newpoint = PT > farend ? PT : farend; |
18e23fd0 | 369 | XSETFASTINT (val, farend); |
dcfdbac7 JB |
370 | |
371 | return val; | |
372 | } | |
373 | ||
374 | DEFUN ("upcase-word", Fupcase_word, Supcase_word, 1, 1, "p", | |
fdb82f93 PJ |
375 | doc: /* Convert following word (or ARG words) to upper case, moving over. |
376 | With negative argument, convert previous words but do not move. | |
377 | See also `capitalize-word'. */) | |
378 | (arg) | |
dcfdbac7 JB |
379 | Lisp_Object arg; |
380 | { | |
34628a90 | 381 | Lisp_Object beg, end; |
438eba3c | 382 | EMACS_INT newpoint; |
6ec8bbd2 | 383 | XSETFASTINT (beg, PT); |
34628a90 RS |
384 | end = operate_on_word (arg, &newpoint); |
385 | casify_region (CASE_UP, beg, end); | |
386 | SET_PT (newpoint); | |
dcfdbac7 JB |
387 | return Qnil; |
388 | } | |
389 | ||
390 | DEFUN ("downcase-word", Fdowncase_word, Sdowncase_word, 1, 1, "p", | |
fdb82f93 PJ |
391 | doc: /* Convert following word (or ARG words) to lower case, moving over. |
392 | With negative argument, convert previous words but do not move. */) | |
393 | (arg) | |
dcfdbac7 JB |
394 | Lisp_Object arg; |
395 | { | |
34628a90 | 396 | Lisp_Object beg, end; |
438eba3c | 397 | EMACS_INT newpoint; |
6ec8bbd2 | 398 | XSETFASTINT (beg, PT); |
34628a90 RS |
399 | end = operate_on_word (arg, &newpoint); |
400 | casify_region (CASE_DOWN, beg, end); | |
401 | SET_PT (newpoint); | |
dcfdbac7 JB |
402 | return Qnil; |
403 | } | |
404 | ||
405 | DEFUN ("capitalize-word", Fcapitalize_word, Scapitalize_word, 1, 1, "p", | |
fdb82f93 PJ |
406 | doc: /* Capitalize the following word (or ARG words), moving over. |
407 | This gives the word(s) a first character in upper case | |
408 | and the rest lower case. | |
409 | With negative argument, capitalize previous words but do not move. */) | |
410 | (arg) | |
dcfdbac7 JB |
411 | Lisp_Object arg; |
412 | { | |
34628a90 | 413 | Lisp_Object beg, end; |
438eba3c | 414 | EMACS_INT newpoint; |
6ec8bbd2 | 415 | XSETFASTINT (beg, PT); |
34628a90 RS |
416 | end = operate_on_word (arg, &newpoint); |
417 | casify_region (CASE_CAPITALIZE, beg, end); | |
418 | SET_PT (newpoint); | |
dcfdbac7 JB |
419 | return Qnil; |
420 | } | |
421 | \f | |
dfcf069d | 422 | void |
dcfdbac7 JB |
423 | syms_of_casefiddle () |
424 | { | |
a04538da KH |
425 | Qidentity = intern ("identity"); |
426 | staticpro (&Qidentity); | |
dcfdbac7 JB |
427 | defsubr (&Supcase); |
428 | defsubr (&Sdowncase); | |
429 | defsubr (&Scapitalize); | |
8cef1f78 | 430 | defsubr (&Supcase_initials); |
dcfdbac7 JB |
431 | defsubr (&Supcase_region); |
432 | defsubr (&Sdowncase_region); | |
433 | defsubr (&Scapitalize_region); | |
8cef1f78 | 434 | defsubr (&Supcase_initials_region); |
dcfdbac7 JB |
435 | defsubr (&Supcase_word); |
436 | defsubr (&Sdowncase_word); | |
437 | defsubr (&Scapitalize_word); | |
438 | } | |
439 | ||
dfcf069d | 440 | void |
dcfdbac7 JB |
441 | keys_of_casefiddle () |
442 | { | |
443 | initial_define_key (control_x_map, Ctl('U'), "upcase-region"); | |
d427b66a | 444 | Fput (intern ("upcase-region"), Qdisabled, Qt); |
dcfdbac7 | 445 | initial_define_key (control_x_map, Ctl('L'), "downcase-region"); |
d427b66a JB |
446 | Fput (intern ("downcase-region"), Qdisabled, Qt); |
447 | ||
dcfdbac7 JB |
448 | initial_define_key (meta_map, 'u', "upcase-word"); |
449 | initial_define_key (meta_map, 'l', "downcase-word"); | |
450 | initial_define_key (meta_map, 'c', "capitalize-word"); | |
451 | } | |
6b61353c KH |
452 | |
453 | /* arch-tag: 60a73c66-5489-47e7-a81f-cead4057c526 | |
454 | (do not change this comment) */ |