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 | ||
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 | |
684d6f5b | 9 | the Free Software Foundation; either version 3, 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" | |
83be827a | 26 | #include "character.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 | { | |
2422e50a | 41 | register int c, c1; |
dcfdbac7 JB |
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 | ||
0d64f689 | 48 | if (INTEGERP (obj)) |
dcfdbac7 | 49 | { |
0d64f689 KH |
50 | int flagbits = (CHAR_ALT | CHAR_SUPER | CHAR_HYPER |
51 | | CHAR_SHIFT | CHAR_CTL | CHAR_META); | |
52 | int flags = XINT (obj) & flagbits; | |
53 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); | |
54 | ||
55 | /* If the character has higher bits set | |
56 | above the flags, return it unchanged. | |
57 | It is not a real character. */ | |
58 | if ((unsigned) XFASTINT (obj) > (unsigned) flagbits) | |
59 | return obj; | |
60 | ||
61 | c1 = XFASTINT (obj) & ~flagbits; | |
62 | if (! multibyte) | |
63 | MAKE_CHAR_MULTIBYTE (c1); | |
64 | c = DOWNCASE (c1); | |
65 | if (inword) | |
66 | XSETFASTINT (obj, c | flags); | |
67 | else if (c == (XFASTINT (obj) & ~flagbits)) | |
dcfdbac7 | 68 | { |
0d64f689 KH |
69 | if (! inword) |
70 | c = UPCASE1 (c1); | |
2422e50a | 71 | if (! multibyte) |
0d64f689 KH |
72 | MAKE_CHAR_UNIBYTE (c); |
73 | XSETFASTINT (obj, c | flags); | |
dcfdbac7 | 74 | } |
0d64f689 KH |
75 | return obj; |
76 | } | |
5245463a | 77 | |
438eba3c SM |
78 | if (!STRINGP (obj)) |
79 | wrong_type_argument (Qchar_or_string_p, obj); | |
80 | else if (!STRING_MULTIBYTE (obj)) | |
0d64f689 | 81 | { |
438eba3c SM |
82 | EMACS_INT i; |
83 | EMACS_INT size = SCHARS (obj); | |
a0615d90 | 84 | |
0d64f689 | 85 | obj = Fcopy_sequence (obj); |
438eba3c | 86 | for (i = 0; i < size; i++) |
0d64f689 | 87 | { |
438eba3c | 88 | c = SREF (obj, i); |
0d64f689 | 89 | MAKE_CHAR_MULTIBYTE (c); |
0d64f689 KH |
90 | c1 = c; |
91 | if (inword && flag != CASE_CAPITALIZE_UP) | |
92 | c = DOWNCASE (c); | |
93 | else if (!UPPERCASEP (c) | |
94 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
95 | c = UPCASE1 (c1); | |
96 | if ((int) flag >= (int) CASE_CAPITALIZE) | |
97 | inword = (SYNTAX (c) == Sword); | |
98 | if (c != c1) | |
99 | { | |
0d64f689 | 100 | MAKE_CHAR_UNIBYTE (c); |
438eba3c SM |
101 | /* If the char can't be converted to a valid byte, just don't |
102 | change it. */ | |
103 | if (c >= 0 && c < 256) | |
104 | SSET (obj, i, c); | |
105 | } | |
106 | } | |
107 | return obj; | |
2422e50a | 108 | } |
0d64f689 | 109 | else |
a0615d90 | 110 | { |
438eba3c SM |
111 | EMACS_INT i, i_byte, len; |
112 | EMACS_INT size = SCHARS (obj); | |
113 | USE_SAFE_ALLOCA; | |
114 | unsigned char *dst, *o; | |
115 | /* Over-allocate by 12%: this is a minor overhead, but should be | |
116 | sufficient in 99.999% of the cases to avoid a reallocation. */ | |
117 | EMACS_INT o_size = SBYTES (obj) + SBYTES (obj) / 8 + MAX_MULTIBYTE_LENGTH; | |
118 | SAFE_ALLOCA (dst, void *, o_size); | |
119 | o = dst; | |
120 | ||
121 | for (i = i_byte = 0; i < size; i++, i_byte += len) | |
122 | { | |
123 | if ((o - dst) + MAX_MULTIBYTE_LENGTH > o_size) | |
124 | { /* Not enough space for the next char: grow the destination. */ | |
125 | unsigned char *old_dst = dst; | |
126 | o_size += o_size; /* Probably overkill, but extremely rare. */ | |
127 | SAFE_ALLOCA (dst, void *, o_size); | |
128 | bcopy (old_dst, dst, o - old_dst); | |
129 | o = dst + (o - old_dst); | |
a0615d90 | 130 | } |
438eba3c SM |
131 | c = STRING_CHAR_AND_LENGTH (SDATA (obj) + i_byte, 0, len); |
132 | if (inword && flag != CASE_CAPITALIZE_UP) | |
133 | c = DOWNCASE (c); | |
134 | else if (!UPPERCASEP (c) | |
135 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
136 | c = UPCASE1 (c); | |
137 | if ((int) flag >= (int) CASE_CAPITALIZE) | |
138 | inword = (SYNTAX (c) == Sword); | |
139 | o += CHAR_STRING (c, o); | |
dcfdbac7 | 140 | } |
438eba3c SM |
141 | eassert (o - dst <= o_size); |
142 | obj = make_multibyte_string (dst, size, o - dst); | |
143 | SAFE_FREE (); | |
0d64f689 | 144 | return obj; |
dcfdbac7 JB |
145 | } |
146 | } | |
147 | ||
148 | DEFUN ("upcase", Fupcase, Supcase, 1, 1, 0, | |
fdb82f93 PJ |
149 | doc: /* Convert argument to upper case and return that. |
150 | The argument may be a character or string. The result has the same type. | |
151 | The argument object is not altered--the value is a copy. | |
152 | See also `capitalize', `downcase' and `upcase-initials'. */) | |
153 | (obj) | |
dcfdbac7 JB |
154 | Lisp_Object obj; |
155 | { | |
156 | return casify_object (CASE_UP, obj); | |
157 | } | |
158 | ||
159 | DEFUN ("downcase", Fdowncase, Sdowncase, 1, 1, 0, | |
fdb82f93 PJ |
160 | doc: /* Convert argument to lower case and return that. |
161 | The argument may be a character or string. The result has the same type. | |
162 | The argument object is not altered--the value is a copy. */) | |
163 | (obj) | |
dcfdbac7 JB |
164 | Lisp_Object obj; |
165 | { | |
166 | return casify_object (CASE_DOWN, obj); | |
167 | } | |
168 | ||
169 | DEFUN ("capitalize", Fcapitalize, Scapitalize, 1, 1, 0, | |
fdb82f93 PJ |
170 | doc: /* Convert argument to capitalized form and return that. |
171 | This means that each word's first character is upper case | |
172 | and the rest is lower case. | |
173 | The argument may be a character or string. The result has the same type. | |
174 | The argument object is not altered--the value is a copy. */) | |
175 | (obj) | |
dcfdbac7 JB |
176 | Lisp_Object obj; |
177 | { | |
178 | return casify_object (CASE_CAPITALIZE, obj); | |
179 | } | |
96927ba4 | 180 | |
2371fad4 KH |
181 | /* Like Fcapitalize but change only the initials. */ |
182 | ||
8cef1f78 | 183 | DEFUN ("upcase-initials", Fupcase_initials, Supcase_initials, 1, 1, 0, |
fdb82f93 PJ |
184 | doc: /* Convert the initial of each word in the argument to upper case. |
185 | Do not change the other letters of each word. | |
186 | The argument may be a character or string. The result has the same type. | |
187 | The argument object is not altered--the value is a copy. */) | |
188 | (obj) | |
8cef1f78 RS |
189 | Lisp_Object obj; |
190 | { | |
191 | return casify_object (CASE_CAPITALIZE_UP, obj); | |
192 | } | |
dcfdbac7 JB |
193 | \f |
194 | /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP. | |
195 | b and e specify range of buffer to operate on. */ | |
196 | ||
dfcf069d | 197 | void |
dcfdbac7 JB |
198 | casify_region (flag, b, e) |
199 | enum case_action flag; | |
200 | Lisp_Object b, e; | |
201 | { | |
dcfdbac7 JB |
202 | register int c; |
203 | register int inword = flag == CASE_DOWN; | |
a0615d90 | 204 | register int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
7927d8e3 SM |
205 | EMACS_INT start, end; |
206 | EMACS_INT start_byte, end_byte; | |
207 | EMACS_INT first = -1, last; /* Position of first and last changes. */ | |
208 | EMACS_INT opoint = PT; | |
209 | EMACS_INT opoint_byte = PT_BYTE; | |
dcfdbac7 JB |
210 | |
211 | if (EQ (b, e)) | |
212 | /* Not modifying because nothing marked */ | |
213 | return; | |
214 | ||
bd47bd35 RS |
215 | /* If the case table is flagged as modified, rescan it. */ |
216 | if (NILP (XCHAR_TABLE (current_buffer->downcase_table)->extras[1])) | |
217 | Fset_case_table (current_buffer->downcase_table); | |
218 | ||
dcfdbac7 | 219 | validate_region (&b, &e); |
2371fad4 KH |
220 | start = XFASTINT (b); |
221 | end = XFASTINT (e); | |
3e145152 | 222 | modify_region (current_buffer, start, end, 0); |
2371fad4 | 223 | record_change (start, end - start); |
4c7b7eab RS |
224 | start_byte = CHAR_TO_BYTE (start); |
225 | end_byte = CHAR_TO_BYTE (end); | |
dcfdbac7 | 226 | |
2422e50a | 227 | while (start < end) |
a04538da | 228 | { |
2422e50a KH |
229 | int c2, len; |
230 | ||
231 | if (multibyte) | |
232 | { | |
233 | c = FETCH_MULTIBYTE_CHAR (start_byte); | |
234 | len = CHAR_BYTES (c); | |
235 | } | |
236 | else | |
237 | { | |
238 | c = FETCH_BYTE (start_byte); | |
239 | MAKE_CHAR_MULTIBYTE (c); | |
240 | len = 1; | |
241 | } | |
242 | c2 = c; | |
a0615d90 KH |
243 | if (inword && flag != CASE_CAPITALIZE_UP) |
244 | c = DOWNCASE (c); | |
245 | else if (!UPPERCASEP (c) | |
246 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
247 | c = UPCASE1 (c); | |
a0615d90 | 248 | if ((int) flag >= (int) CASE_CAPITALIZE) |
8f924df7 | 249 | inword = ((SYNTAX (c) == Sword) && (inword || !SYNTAX_PREFIX (c))); |
2422e50a | 250 | if (c != c2) |
a04538da | 251 | { |
7927d8e3 SM |
252 | last = start; |
253 | if (first < 0) | |
254 | first = start; | |
255 | ||
2422e50a KH |
256 | if (! multibyte) |
257 | { | |
258 | MAKE_CHAR_UNIBYTE (c); | |
259 | FETCH_BYTE (start_byte) = c; | |
260 | } | |
261 | else if (ASCII_CHAR_P (c2) && ASCII_CHAR_P (c)) | |
262 | FETCH_BYTE (start_byte) = c; | |
08588bfa | 263 | else |
a04538da | 264 | { |
08588bfa | 265 | int tolen = CHAR_BYTES (c); |
2422e50a | 266 | int j; |
66da2880 | 267 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
a04538da | 268 | |
2422e50a | 269 | CHAR_STRING (c, str); |
08588bfa KH |
270 | if (len == tolen) |
271 | { | |
272 | /* Length is unchanged. */ | |
273 | for (j = 0; j < len; ++j) | |
274 | FETCH_BYTE (start_byte + j) = str[j]; | |
275 | } | |
276 | else | |
277 | { | |
278 | /* Replace one character with the other, | |
279 | keeping text properties the same. */ | |
280 | replace_range_2 (start, start_byte, | |
281 | start + 1, start_byte + len, | |
282 | str, 1, tolen, | |
283 | 0); | |
284 | len = tolen; | |
285 | } | |
a04538da | 286 | } |
a04538da | 287 | } |
2422e50a KH |
288 | start++; |
289 | start_byte += len; | |
dcfdbac7 JB |
290 | } |
291 | ||
8f924df7 KH |
292 | if (PT != opoint) |
293 | TEMP_SET_PT_BOTH (opoint, opoint_byte); | |
294 | ||
7927d8e3 | 295 | if (first >= 0) |
66da2880 | 296 | { |
7927d8e3 SM |
297 | signal_after_change (first, last + 1 - first, last + 1 - first); |
298 | update_compositions (first, last + 1, CHECK_ALL); | |
66da2880 | 299 | } |
dcfdbac7 JB |
300 | } |
301 | ||
302 | DEFUN ("upcase-region", Fupcase_region, Supcase_region, 2, 2, "r", | |
fdb82f93 PJ |
303 | doc: /* Convert the region to upper case. In programs, wants two arguments. |
304 | These arguments specify the starting and ending character numbers of | |
305 | the region to operate on. When used as a command, the text between | |
306 | point and the mark is operated on. | |
307 | See also `capitalize-region'. */) | |
308 | (beg, end) | |
8c22d56c | 309 | Lisp_Object beg, end; |
dcfdbac7 | 310 | { |
8c22d56c | 311 | casify_region (CASE_UP, beg, end); |
dcfdbac7 JB |
312 | return Qnil; |
313 | } | |
314 | ||
315 | DEFUN ("downcase-region", Fdowncase_region, Sdowncase_region, 2, 2, "r", | |
fdb82f93 PJ |
316 | doc: /* Convert the region to lower case. In programs, wants two arguments. |
317 | These arguments specify the starting and ending character numbers of | |
318 | the region to operate on. When used as a command, the text between | |
319 | point and the mark is operated on. */) | |
320 | (beg, end) | |
8c22d56c | 321 | Lisp_Object beg, end; |
dcfdbac7 | 322 | { |
8c22d56c | 323 | casify_region (CASE_DOWN, beg, end); |
dcfdbac7 JB |
324 | return Qnil; |
325 | } | |
326 | ||
327 | DEFUN ("capitalize-region", Fcapitalize_region, Scapitalize_region, 2, 2, "r", | |
fdb82f93 PJ |
328 | doc: /* Convert the region to capitalized form. |
329 | Capitalized form means each word's first character is upper case | |
330 | and the rest of it is lower case. | |
331 | In programs, give two arguments, the starting and ending | |
332 | character positions to operate on. */) | |
333 | (beg, end) | |
8c22d56c | 334 | Lisp_Object beg, end; |
dcfdbac7 | 335 | { |
8c22d56c | 336 | casify_region (CASE_CAPITALIZE, beg, end); |
dcfdbac7 JB |
337 | return Qnil; |
338 | } | |
339 | ||
2371fad4 KH |
340 | /* Like Fcapitalize_region but change only the initials. */ |
341 | ||
8cef1f78 RS |
342 | DEFUN ("upcase-initials-region", Fupcase_initials_region, |
343 | Supcase_initials_region, 2, 2, "r", | |
fdb82f93 PJ |
344 | doc: /* Upcase the initial of each word in the region. |
345 | Subsequent letters of each word are not changed. | |
346 | In programs, give two arguments, the starting and ending | |
347 | character positions to operate on. */) | |
348 | (beg, end) | |
8c22d56c | 349 | Lisp_Object beg, end; |
8cef1f78 | 350 | { |
8c22d56c | 351 | casify_region (CASE_CAPITALIZE_UP, beg, end); |
8cef1f78 RS |
352 | return Qnil; |
353 | } | |
dcfdbac7 | 354 | \f |
438eba3c | 355 | static Lisp_Object |
34628a90 | 356 | operate_on_word (arg, newpoint) |
dcfdbac7 | 357 | Lisp_Object arg; |
438eba3c | 358 | EMACS_INT *newpoint; |
dcfdbac7 | 359 | { |
39fb55ff | 360 | Lisp_Object val; |
34628a90 | 361 | int farend; |
2371fad4 | 362 | int iarg; |
dcfdbac7 | 363 | |
b7826503 | 364 | CHECK_NUMBER (arg); |
2371fad4 | 365 | iarg = XINT (arg); |
6ec8bbd2 | 366 | farend = scan_words (PT, iarg); |
dcfdbac7 | 367 | if (!farend) |
2371fad4 | 368 | farend = iarg > 0 ? ZV : BEGV; |
dcfdbac7 | 369 | |
6ec8bbd2 | 370 | *newpoint = PT > farend ? PT : farend; |
18e23fd0 | 371 | XSETFASTINT (val, farend); |
dcfdbac7 JB |
372 | |
373 | return val; | |
374 | } | |
375 | ||
376 | DEFUN ("upcase-word", Fupcase_word, Supcase_word, 1, 1, "p", | |
fdb82f93 PJ |
377 | doc: /* Convert following word (or ARG words) to upper case, moving over. |
378 | With negative argument, convert previous words but do not move. | |
379 | See also `capitalize-word'. */) | |
380 | (arg) | |
dcfdbac7 JB |
381 | Lisp_Object arg; |
382 | { | |
34628a90 | 383 | Lisp_Object beg, end; |
438eba3c | 384 | EMACS_INT newpoint; |
6ec8bbd2 | 385 | XSETFASTINT (beg, PT); |
34628a90 RS |
386 | end = operate_on_word (arg, &newpoint); |
387 | casify_region (CASE_UP, beg, end); | |
388 | SET_PT (newpoint); | |
dcfdbac7 JB |
389 | return Qnil; |
390 | } | |
391 | ||
392 | DEFUN ("downcase-word", Fdowncase_word, Sdowncase_word, 1, 1, "p", | |
fdb82f93 PJ |
393 | doc: /* Convert following word (or ARG words) to lower case, moving over. |
394 | With negative argument, convert previous words but do not move. */) | |
395 | (arg) | |
dcfdbac7 JB |
396 | Lisp_Object arg; |
397 | { | |
34628a90 | 398 | Lisp_Object beg, end; |
438eba3c | 399 | EMACS_INT newpoint; |
6ec8bbd2 | 400 | XSETFASTINT (beg, PT); |
34628a90 RS |
401 | end = operate_on_word (arg, &newpoint); |
402 | casify_region (CASE_DOWN, beg, end); | |
403 | SET_PT (newpoint); | |
dcfdbac7 JB |
404 | return Qnil; |
405 | } | |
406 | ||
407 | DEFUN ("capitalize-word", Fcapitalize_word, Scapitalize_word, 1, 1, "p", | |
fdb82f93 PJ |
408 | doc: /* Capitalize the following word (or ARG words), moving over. |
409 | This gives the word(s) a first character in upper case | |
410 | and the rest lower case. | |
411 | With negative argument, capitalize previous words but do not move. */) | |
412 | (arg) | |
dcfdbac7 JB |
413 | Lisp_Object arg; |
414 | { | |
34628a90 | 415 | Lisp_Object beg, end; |
438eba3c | 416 | EMACS_INT newpoint; |
6ec8bbd2 | 417 | XSETFASTINT (beg, PT); |
34628a90 RS |
418 | end = operate_on_word (arg, &newpoint); |
419 | casify_region (CASE_CAPITALIZE, beg, end); | |
420 | SET_PT (newpoint); | |
dcfdbac7 JB |
421 | return Qnil; |
422 | } | |
423 | \f | |
dfcf069d | 424 | void |
dcfdbac7 JB |
425 | syms_of_casefiddle () |
426 | { | |
a04538da KH |
427 | Qidentity = intern ("identity"); |
428 | staticpro (&Qidentity); | |
dcfdbac7 JB |
429 | defsubr (&Supcase); |
430 | defsubr (&Sdowncase); | |
431 | defsubr (&Scapitalize); | |
8cef1f78 | 432 | defsubr (&Supcase_initials); |
dcfdbac7 JB |
433 | defsubr (&Supcase_region); |
434 | defsubr (&Sdowncase_region); | |
435 | defsubr (&Scapitalize_region); | |
8cef1f78 | 436 | defsubr (&Supcase_initials_region); |
dcfdbac7 JB |
437 | defsubr (&Supcase_word); |
438 | defsubr (&Sdowncase_word); | |
439 | defsubr (&Scapitalize_word); | |
440 | } | |
441 | ||
dfcf069d | 442 | void |
dcfdbac7 JB |
443 | keys_of_casefiddle () |
444 | { | |
445 | initial_define_key (control_x_map, Ctl('U'), "upcase-region"); | |
d427b66a | 446 | Fput (intern ("upcase-region"), Qdisabled, Qt); |
dcfdbac7 | 447 | initial_define_key (control_x_map, Ctl('L'), "downcase-region"); |
d427b66a JB |
448 | Fput (intern ("downcase-region"), Qdisabled, Qt); |
449 | ||
dcfdbac7 JB |
450 | initial_define_key (meta_map, 'u', "upcase-word"); |
451 | initial_define_key (meta_map, 'l', "downcase-word"); | |
452 | initial_define_key (meta_map, 'c', "capitalize-word"); | |
453 | } | |
6b61353c KH |
454 | |
455 | /* arch-tag: 60a73c66-5489-47e7-a81f-cead4057c526 | |
456 | (do not change this comment) */ |