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, |
114f9c96 | 3 | 2005, 2006, 2007, 2008, 2009, 2010 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> |
d7306fe6 | 22 | #include <setjmp.h> |
dcfdbac7 JB |
23 | #include "lisp.h" |
24 | #include "buffer.h" | |
83be827a | 25 | #include "character.h" |
dcfdbac7 JB |
26 | #include "commands.h" |
27 | #include "syntax.h" | |
66da2880 | 28 | #include "composite.h" |
e35f6ff7 | 29 | #include "keymap.h" |
dcfdbac7 JB |
30 | |
31 | enum case_action {CASE_UP, CASE_DOWN, CASE_CAPITALIZE, CASE_CAPITALIZE_UP}; | |
a04538da KH |
32 | |
33 | Lisp_Object Qidentity; | |
dcfdbac7 JB |
34 | \f |
35 | Lisp_Object | |
971de7fb | 36 | casify_object (enum case_action flag, Lisp_Object obj) |
dcfdbac7 | 37 | { |
2422e50a | 38 | register int c, c1; |
dcfdbac7 JB |
39 | register int inword = flag == CASE_DOWN; |
40 | ||
bd47bd35 RS |
41 | /* If the case table is flagged as modified, rescan it. */ |
42 | if (NILP (XCHAR_TABLE (current_buffer->downcase_table)->extras[1])) | |
43 | Fset_case_table (current_buffer->downcase_table); | |
44 | ||
0d64f689 | 45 | if (INTEGERP (obj)) |
dcfdbac7 | 46 | { |
0d64f689 KH |
47 | int flagbits = (CHAR_ALT | CHAR_SUPER | CHAR_HYPER |
48 | | CHAR_SHIFT | CHAR_CTL | CHAR_META); | |
49 | int flags = XINT (obj) & flagbits; | |
50 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); | |
51 | ||
52 | /* If the character has higher bits set | |
53 | above the flags, return it unchanged. | |
54 | It is not a real character. */ | |
55 | if ((unsigned) XFASTINT (obj) > (unsigned) flagbits) | |
56 | return obj; | |
57 | ||
58 | c1 = XFASTINT (obj) & ~flagbits; | |
1fb5aad7 SM |
59 | /* FIXME: Even if enable-multibyte-characters is nil, we may |
60 | manipulate multibyte chars. This means we have a bug for latin-1 | |
61 | chars since when we receive an int 128-255 we can't tell whether | |
62 | it's an eight-bit byte or a latin-1 char. */ | |
63 | if (c1 >= 256) | |
64 | multibyte = 1; | |
0d64f689 KH |
65 | if (! multibyte) |
66 | MAKE_CHAR_MULTIBYTE (c1); | |
67 | c = DOWNCASE (c1); | |
68 | if (inword) | |
69 | XSETFASTINT (obj, c | flags); | |
70 | else if (c == (XFASTINT (obj) & ~flagbits)) | |
dcfdbac7 | 71 | { |
0d64f689 KH |
72 | if (! inword) |
73 | c = UPCASE1 (c1); | |
2422e50a | 74 | if (! multibyte) |
0d64f689 KH |
75 | MAKE_CHAR_UNIBYTE (c); |
76 | XSETFASTINT (obj, c | flags); | |
dcfdbac7 | 77 | } |
0d64f689 KH |
78 | return obj; |
79 | } | |
5245463a | 80 | |
438eba3c SM |
81 | if (!STRINGP (obj)) |
82 | wrong_type_argument (Qchar_or_string_p, obj); | |
83 | else if (!STRING_MULTIBYTE (obj)) | |
0d64f689 | 84 | { |
438eba3c SM |
85 | EMACS_INT i; |
86 | EMACS_INT size = SCHARS (obj); | |
a0615d90 | 87 | |
0d64f689 | 88 | obj = Fcopy_sequence (obj); |
438eba3c | 89 | for (i = 0; i < size; i++) |
0d64f689 | 90 | { |
438eba3c | 91 | c = SREF (obj, i); |
4c0354d7 | 92 | MAKE_CHAR_MULTIBYTE (c); |
0d64f689 KH |
93 | c1 = c; |
94 | if (inword && flag != CASE_CAPITALIZE_UP) | |
95 | c = DOWNCASE (c); | |
96 | else if (!UPPERCASEP (c) | |
97 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
98 | c = UPCASE1 (c1); | |
99 | if ((int) flag >= (int) CASE_CAPITALIZE) | |
100 | inword = (SYNTAX (c) == Sword); | |
101 | if (c != c1) | |
102 | { | |
0d64f689 | 103 | MAKE_CHAR_UNIBYTE (c); |
438eba3c SM |
104 | /* If the char can't be converted to a valid byte, just don't |
105 | change it. */ | |
106 | if (c >= 0 && c < 256) | |
107 | SSET (obj, i, c); | |
108 | } | |
109 | } | |
110 | return obj; | |
994b75e0 SM |
111 | } |
112 | else | |
113 | { | |
114 | EMACS_INT i, i_byte, size = SCHARS (obj); | |
115 | int len; | |
438eba3c SM |
116 | USE_SAFE_ALLOCA; |
117 | unsigned char *dst, *o; | |
118 | /* Over-allocate by 12%: this is a minor overhead, but should be | |
119 | sufficient in 99.999% of the cases to avoid a reallocation. */ | |
120 | EMACS_INT o_size = SBYTES (obj) + SBYTES (obj) / 8 + MAX_MULTIBYTE_LENGTH; | |
121 | SAFE_ALLOCA (dst, void *, o_size); | |
122 | o = dst; | |
123 | ||
124 | for (i = i_byte = 0; i < size; i++, i_byte += len) | |
125 | { | |
126 | if ((o - dst) + MAX_MULTIBYTE_LENGTH > o_size) | |
127 | { /* Not enough space for the next char: grow the destination. */ | |
128 | unsigned char *old_dst = dst; | |
129 | o_size += o_size; /* Probably overkill, but extremely rare. */ | |
130 | SAFE_ALLOCA (dst, void *, o_size); | |
72af86bd | 131 | memcpy (dst, old_dst, o - old_dst); |
438eba3c | 132 | o = dst + (o - old_dst); |
a0615d90 | 133 | } |
62a6e103 | 134 | c = STRING_CHAR_AND_LENGTH (SDATA (obj) + i_byte, len); |
438eba3c SM |
135 | if (inword && flag != CASE_CAPITALIZE_UP) |
136 | c = DOWNCASE (c); | |
137 | else if (!UPPERCASEP (c) | |
138 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
139 | c = UPCASE1 (c); | |
140 | if ((int) flag >= (int) CASE_CAPITALIZE) | |
141 | inword = (SYNTAX (c) == Sword); | |
142 | o += CHAR_STRING (c, o); | |
dcfdbac7 | 143 | } |
438eba3c SM |
144 | eassert (o - dst <= o_size); |
145 | obj = make_multibyte_string (dst, size, o - dst); | |
146 | SAFE_FREE (); | |
0d64f689 | 147 | return obj; |
dcfdbac7 JB |
148 | } |
149 | } | |
150 | ||
151 | DEFUN ("upcase", Fupcase, Supcase, 1, 1, 0, | |
fdb82f93 PJ |
152 | doc: /* Convert argument to upper case and return that. |
153 | The argument may be a character or string. The result has the same type. | |
154 | The argument object is not altered--the value is a copy. | |
155 | See also `capitalize', `downcase' and `upcase-initials'. */) | |
5842a27b | 156 | (Lisp_Object obj) |
dcfdbac7 JB |
157 | { |
158 | return casify_object (CASE_UP, obj); | |
159 | } | |
160 | ||
161 | DEFUN ("downcase", Fdowncase, Sdowncase, 1, 1, 0, | |
fdb82f93 PJ |
162 | doc: /* Convert argument to lower case and return that. |
163 | The argument may be a character or string. The result has the same type. | |
164 | The argument object is not altered--the value is a copy. */) | |
5842a27b | 165 | (Lisp_Object obj) |
dcfdbac7 JB |
166 | { |
167 | return casify_object (CASE_DOWN, obj); | |
168 | } | |
169 | ||
170 | DEFUN ("capitalize", Fcapitalize, Scapitalize, 1, 1, 0, | |
fdb82f93 PJ |
171 | doc: /* Convert argument to capitalized form and return that. |
172 | This means that each word's first character is upper case | |
173 | and the rest is lower case. | |
174 | The argument may be a character or string. The result has the same type. | |
175 | The argument object is not altered--the value is a copy. */) | |
5842a27b | 176 | (Lisp_Object obj) |
dcfdbac7 JB |
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. */) | |
5842a27b | 188 | (Lisp_Object obj) |
8cef1f78 RS |
189 | { |
190 | return casify_object (CASE_CAPITALIZE_UP, obj); | |
191 | } | |
dcfdbac7 JB |
192 | \f |
193 | /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP. | |
194 | b and e specify range of buffer to operate on. */ | |
195 | ||
dfcf069d | 196 | void |
971de7fb | 197 | casify_region (enum case_action flag, Lisp_Object b, Lisp_Object e) |
dcfdbac7 | 198 | { |
dcfdbac7 JB |
199 | register int c; |
200 | register int inword = flag == CASE_DOWN; | |
a0615d90 | 201 | register int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
7927d8e3 SM |
202 | EMACS_INT start, end; |
203 | EMACS_INT start_byte, end_byte; | |
204 | EMACS_INT first = -1, last; /* Position of first and last changes. */ | |
205 | EMACS_INT opoint = PT; | |
206 | EMACS_INT opoint_byte = PT_BYTE; | |
dcfdbac7 JB |
207 | |
208 | if (EQ (b, e)) | |
209 | /* Not modifying because nothing marked */ | |
210 | return; | |
211 | ||
bd47bd35 RS |
212 | /* If the case table is flagged as modified, rescan it. */ |
213 | if (NILP (XCHAR_TABLE (current_buffer->downcase_table)->extras[1])) | |
214 | Fset_case_table (current_buffer->downcase_table); | |
215 | ||
dcfdbac7 | 216 | validate_region (&b, &e); |
2371fad4 KH |
217 | start = XFASTINT (b); |
218 | end = XFASTINT (e); | |
3e145152 | 219 | modify_region (current_buffer, start, end, 0); |
2371fad4 | 220 | record_change (start, end - start); |
4c7b7eab RS |
221 | start_byte = CHAR_TO_BYTE (start); |
222 | end_byte = CHAR_TO_BYTE (end); | |
dcfdbac7 | 223 | |
c785836d SM |
224 | SETUP_BUFFER_SYNTAX_TABLE(); /* For syntax_prefix_flag_p. */ |
225 | ||
2422e50a | 226 | while (start < end) |
a04538da | 227 | { |
2422e50a KH |
228 | int c2, len; |
229 | ||
230 | if (multibyte) | |
231 | { | |
232 | c = FETCH_MULTIBYTE_CHAR (start_byte); | |
233 | len = CHAR_BYTES (c); | |
234 | } | |
235 | else | |
236 | { | |
237 | c = FETCH_BYTE (start_byte); | |
238 | MAKE_CHAR_MULTIBYTE (c); | |
239 | len = 1; | |
240 | } | |
241 | c2 = c; | |
a0615d90 KH |
242 | if (inword && flag != CASE_CAPITALIZE_UP) |
243 | c = DOWNCASE (c); | |
244 | else if (!UPPERCASEP (c) | |
245 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
246 | c = UPCASE1 (c); | |
a0615d90 | 247 | if ((int) flag >= (int) CASE_CAPITALIZE) |
c5683ceb SM |
248 | inword = ((SYNTAX (c) == Sword) |
249 | && (inword || !syntax_prefix_flag_p (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'. */) | |
5842a27b | 308 | (Lisp_Object beg, Lisp_Object end) |
dcfdbac7 | 309 | { |
8c22d56c | 310 | casify_region (CASE_UP, beg, end); |
dcfdbac7 JB |
311 | return Qnil; |
312 | } | |
313 | ||
314 | DEFUN ("downcase-region", Fdowncase_region, Sdowncase_region, 2, 2, "r", | |
fdb82f93 PJ |
315 | doc: /* Convert the region to lower case. In programs, wants two arguments. |
316 | These arguments specify the starting and ending character numbers of | |
317 | the region to operate on. When used as a command, the text between | |
318 | point and the mark is operated on. */) | |
5842a27b | 319 | (Lisp_Object beg, Lisp_Object 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. */) | |
5842a27b | 331 | (Lisp_Object beg, Lisp_Object end) |
dcfdbac7 | 332 | { |
8c22d56c | 333 | casify_region (CASE_CAPITALIZE, beg, end); |
dcfdbac7 JB |
334 | return Qnil; |
335 | } | |
336 | ||
2371fad4 KH |
337 | /* Like Fcapitalize_region but change only the initials. */ |
338 | ||
8cef1f78 RS |
339 | DEFUN ("upcase-initials-region", Fupcase_initials_region, |
340 | Supcase_initials_region, 2, 2, "r", | |
fdb82f93 PJ |
341 | doc: /* Upcase the initial of each word in the region. |
342 | Subsequent letters of each word are not changed. | |
343 | In programs, give two arguments, the starting and ending | |
344 | character positions to operate on. */) | |
5842a27b | 345 | (Lisp_Object beg, Lisp_Object end) |
8cef1f78 | 346 | { |
8c22d56c | 347 | casify_region (CASE_CAPITALIZE_UP, beg, end); |
8cef1f78 RS |
348 | return Qnil; |
349 | } | |
dcfdbac7 | 350 | \f |
438eba3c | 351 | static Lisp_Object |
971de7fb | 352 | operate_on_word (Lisp_Object arg, EMACS_INT *newpoint) |
dcfdbac7 | 353 | { |
39fb55ff | 354 | Lisp_Object val; |
34628a90 | 355 | int farend; |
2371fad4 | 356 | int iarg; |
dcfdbac7 | 357 | |
b7826503 | 358 | CHECK_NUMBER (arg); |
2371fad4 | 359 | iarg = XINT (arg); |
6ec8bbd2 | 360 | farend = scan_words (PT, iarg); |
dcfdbac7 | 361 | if (!farend) |
2371fad4 | 362 | farend = iarg > 0 ? ZV : BEGV; |
dcfdbac7 | 363 | |
6ec8bbd2 | 364 | *newpoint = PT > farend ? PT : farend; |
18e23fd0 | 365 | XSETFASTINT (val, farend); |
dcfdbac7 JB |
366 | |
367 | return val; | |
368 | } | |
369 | ||
370 | DEFUN ("upcase-word", Fupcase_word, Supcase_word, 1, 1, "p", | |
fdb82f93 PJ |
371 | doc: /* Convert following word (or ARG words) to upper case, moving over. |
372 | With negative argument, convert previous words but do not move. | |
373 | See also `capitalize-word'. */) | |
5842a27b | 374 | (Lisp_Object arg) |
dcfdbac7 | 375 | { |
34628a90 | 376 | Lisp_Object beg, end; |
438eba3c | 377 | EMACS_INT newpoint; |
6ec8bbd2 | 378 | XSETFASTINT (beg, PT); |
34628a90 RS |
379 | end = operate_on_word (arg, &newpoint); |
380 | casify_region (CASE_UP, beg, end); | |
381 | SET_PT (newpoint); | |
dcfdbac7 JB |
382 | return Qnil; |
383 | } | |
384 | ||
385 | DEFUN ("downcase-word", Fdowncase_word, Sdowncase_word, 1, 1, "p", | |
fdb82f93 PJ |
386 | doc: /* Convert following word (or ARG words) to lower case, moving over. |
387 | With negative argument, convert previous words but do not move. */) | |
5842a27b | 388 | (Lisp_Object arg) |
dcfdbac7 | 389 | { |
34628a90 | 390 | Lisp_Object beg, end; |
438eba3c | 391 | EMACS_INT newpoint; |
6ec8bbd2 | 392 | XSETFASTINT (beg, PT); |
34628a90 RS |
393 | end = operate_on_word (arg, &newpoint); |
394 | casify_region (CASE_DOWN, beg, end); | |
395 | SET_PT (newpoint); | |
dcfdbac7 JB |
396 | return Qnil; |
397 | } | |
398 | ||
399 | DEFUN ("capitalize-word", Fcapitalize_word, Scapitalize_word, 1, 1, "p", | |
fdb82f93 PJ |
400 | doc: /* Capitalize the following word (or ARG words), moving over. |
401 | This gives the word(s) a first character in upper case | |
402 | and the rest lower case. | |
403 | With negative argument, capitalize previous words but do not move. */) | |
5842a27b | 404 | (Lisp_Object arg) |
dcfdbac7 | 405 | { |
34628a90 | 406 | Lisp_Object beg, end; |
438eba3c | 407 | EMACS_INT newpoint; |
6ec8bbd2 | 408 | XSETFASTINT (beg, PT); |
34628a90 RS |
409 | end = operate_on_word (arg, &newpoint); |
410 | casify_region (CASE_CAPITALIZE, beg, end); | |
411 | SET_PT (newpoint); | |
dcfdbac7 JB |
412 | return Qnil; |
413 | } | |
414 | \f | |
dfcf069d | 415 | void |
971de7fb | 416 | syms_of_casefiddle (void) |
dcfdbac7 | 417 | { |
d67b4f80 | 418 | Qidentity = intern_c_string ("identity"); |
a04538da | 419 | staticpro (&Qidentity); |
dcfdbac7 JB |
420 | defsubr (&Supcase); |
421 | defsubr (&Sdowncase); | |
422 | defsubr (&Scapitalize); | |
8cef1f78 | 423 | defsubr (&Supcase_initials); |
dcfdbac7 JB |
424 | defsubr (&Supcase_region); |
425 | defsubr (&Sdowncase_region); | |
426 | defsubr (&Scapitalize_region); | |
8cef1f78 | 427 | defsubr (&Supcase_initials_region); |
dcfdbac7 JB |
428 | defsubr (&Supcase_word); |
429 | defsubr (&Sdowncase_word); | |
430 | defsubr (&Scapitalize_word); | |
431 | } | |
432 | ||
dfcf069d | 433 | void |
971de7fb | 434 | keys_of_casefiddle (void) |
dcfdbac7 JB |
435 | { |
436 | initial_define_key (control_x_map, Ctl('U'), "upcase-region"); | |
d427b66a | 437 | Fput (intern ("upcase-region"), Qdisabled, Qt); |
dcfdbac7 | 438 | initial_define_key (control_x_map, Ctl('L'), "downcase-region"); |
d427b66a JB |
439 | Fput (intern ("downcase-region"), Qdisabled, Qt); |
440 | ||
dcfdbac7 JB |
441 | initial_define_key (meta_map, 'u', "upcase-word"); |
442 | initial_define_key (meta_map, 'l', "downcase-word"); | |
443 | initial_define_key (meta_map, 'c', "capitalize-word"); | |
444 | } | |
6b61353c KH |
445 | |
446 | /* arch-tag: 60a73c66-5489-47e7-a81f-cead4057c526 | |
447 | (do not change this comment) */ |