Commit | Line | Data |
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dcfdbac7 | 1 | /* GNU Emacs case conversion functions. |
95df8112 | 2 | |
ab422c4d PE |
3 | Copyright (C) 1985, 1994, 1997-1999, 2001-2013 Free Software Foundation, |
4 | Inc. | |
dcfdbac7 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
dcfdbac7 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
dcfdbac7 JB |
12 | |
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
dcfdbac7 JB |
20 | |
21 | ||
18160b98 | 22 | #include <config.h> |
0328b6de | 23 | |
dcfdbac7 | 24 | #include "lisp.h" |
83be827a | 25 | #include "character.h" |
e5560ff7 | 26 | #include "buffer.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 | 35 | \f |
181aa2be | 36 | static Lisp_Object |
971de7fb | 37 | casify_object (enum case_action flag, Lisp_Object obj) |
dcfdbac7 | 38 | { |
17c05d74 PE |
39 | int c, c1; |
40 | bool inword = flag == CASE_DOWN; | |
dcfdbac7 | 41 | |
bd47bd35 | 42 | /* If the case table is flagged as modified, rescan it. */ |
4b4deea2 TT |
43 | if (NILP (XCHAR_TABLE (BVAR (current_buffer, downcase_table))->extras[1])) |
44 | Fset_case_table (BVAR (current_buffer, downcase_table)); | |
bd47bd35 | 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; | |
17c05d74 PE |
51 | bool multibyte = ! NILP (BVAR (current_buffer, |
52 | enable_multibyte_characters)); | |
0d64f689 KH |
53 | |
54 | /* If the character has higher bits set | |
55 | above the flags, return it unchanged. | |
56 | It is not a real character. */ | |
ea204efb | 57 | if (UNSIGNED_CMP (XFASTINT (obj), >, flagbits)) |
0d64f689 KH |
58 | return obj; |
59 | ||
60 | c1 = XFASTINT (obj) & ~flagbits; | |
1fb5aad7 SM |
61 | /* FIXME: Even if enable-multibyte-characters is nil, we may |
62 | manipulate multibyte chars. This means we have a bug for latin-1 | |
63 | chars since when we receive an int 128-255 we can't tell whether | |
64 | it's an eight-bit byte or a latin-1 char. */ | |
65 | if (c1 >= 256) | |
66 | multibyte = 1; | |
0d64f689 KH |
67 | if (! multibyte) |
68 | MAKE_CHAR_MULTIBYTE (c1); | |
5da9919f | 69 | c = downcase (c1); |
0d64f689 KH |
70 | if (inword) |
71 | XSETFASTINT (obj, c | flags); | |
72 | else if (c == (XFASTINT (obj) & ~flagbits)) | |
dcfdbac7 | 73 | { |
0d64f689 | 74 | if (! inword) |
5da9919f | 75 | c = upcase1 (c1); |
2422e50a | 76 | if (! multibyte) |
0d64f689 KH |
77 | MAKE_CHAR_UNIBYTE (c); |
78 | XSETFASTINT (obj, c | flags); | |
dcfdbac7 | 79 | } |
0d64f689 KH |
80 | return obj; |
81 | } | |
5245463a | 82 | |
438eba3c SM |
83 | if (!STRINGP (obj)) |
84 | wrong_type_argument (Qchar_or_string_p, obj); | |
85 | else if (!STRING_MULTIBYTE (obj)) | |
0d64f689 | 86 | { |
d311d28c PE |
87 | ptrdiff_t i; |
88 | ptrdiff_t size = SCHARS (obj); | |
a0615d90 | 89 | |
0d64f689 | 90 | obj = Fcopy_sequence (obj); |
438eba3c | 91 | for (i = 0; i < size; i++) |
0d64f689 | 92 | { |
438eba3c | 93 | c = SREF (obj, i); |
4c0354d7 | 94 | MAKE_CHAR_MULTIBYTE (c); |
0d64f689 KH |
95 | c1 = c; |
96 | if (inword && flag != CASE_CAPITALIZE_UP) | |
5da9919f PE |
97 | c = downcase (c); |
98 | else if (!uppercasep (c) | |
0d64f689 | 99 | && (!inword || flag != CASE_CAPITALIZE_UP)) |
5da9919f | 100 | c = upcase1 (c1); |
0d64f689 KH |
101 | if ((int) flag >= (int) CASE_CAPITALIZE) |
102 | inword = (SYNTAX (c) == Sword); | |
103 | if (c != c1) | |
104 | { | |
0d64f689 | 105 | MAKE_CHAR_UNIBYTE (c); |
438eba3c SM |
106 | /* If the char can't be converted to a valid byte, just don't |
107 | change it. */ | |
108 | if (c >= 0 && c < 256) | |
109 | SSET (obj, i, c); | |
110 | } | |
111 | } | |
112 | return obj; | |
994b75e0 SM |
113 | } |
114 | else | |
115 | { | |
d311d28c | 116 | ptrdiff_t i, i_byte, size = SCHARS (obj); |
994b75e0 | 117 | int len; |
438eba3c | 118 | USE_SAFE_ALLOCA; |
d311d28c PE |
119 | ptrdiff_t o_size = (size < STRING_BYTES_BOUND / MAX_MULTIBYTE_LENGTH |
120 | ? size * MAX_MULTIBYTE_LENGTH | |
121 | : STRING_BYTES_BOUND); | |
98c6f1e3 PE |
122 | unsigned char *dst = SAFE_ALLOCA (o_size); |
123 | unsigned char *o = dst; | |
438eba3c SM |
124 | |
125 | for (i = i_byte = 0; i < size; i++, i_byte += len) | |
126 | { | |
d311d28c PE |
127 | if (o_size - (o - dst) < MAX_MULTIBYTE_LENGTH) |
128 | string_overflow (); | |
62a6e103 | 129 | c = STRING_CHAR_AND_LENGTH (SDATA (obj) + i_byte, len); |
438eba3c | 130 | if (inword && flag != CASE_CAPITALIZE_UP) |
5da9919f PE |
131 | c = downcase (c); |
132 | else if (!uppercasep (c) | |
438eba3c | 133 | && (!inword || flag != CASE_CAPITALIZE_UP)) |
5da9919f | 134 | c = upcase1 (c); |
438eba3c SM |
135 | if ((int) flag >= (int) CASE_CAPITALIZE) |
136 | inword = (SYNTAX (c) == Sword); | |
137 | o += CHAR_STRING (c, o); | |
dcfdbac7 | 138 | } |
438eba3c | 139 | eassert (o - dst <= o_size); |
47ce90e4 | 140 | obj = make_multibyte_string ((char *) dst, size, o - dst); |
438eba3c | 141 | SAFE_FREE (); |
0d64f689 | 142 | return obj; |
dcfdbac7 JB |
143 | } |
144 | } | |
145 | ||
a7ca3326 | 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'. */) | |
5842a27b | 151 | (Lisp_Object obj) |
dcfdbac7 JB |
152 | { |
153 | return casify_object (CASE_UP, obj); | |
154 | } | |
155 | ||
a7ca3326 | 156 | DEFUN ("downcase", Fdowncase, Sdowncase, 1, 1, 0, |
fdb82f93 PJ |
157 | doc: /* Convert argument to lower case and return that. |
158 | The argument may be a character or string. The result has the same type. | |
159 | The argument object is not altered--the value is a copy. */) | |
5842a27b | 160 | (Lisp_Object obj) |
dcfdbac7 JB |
161 | { |
162 | return casify_object (CASE_DOWN, obj); | |
163 | } | |
164 | ||
165 | DEFUN ("capitalize", Fcapitalize, Scapitalize, 1, 1, 0, | |
fdb82f93 PJ |
166 | doc: /* Convert argument to capitalized form and return that. |
167 | This means that each word's first character is upper case | |
168 | and the rest is lower case. | |
169 | The argument may be a character or string. The result has the same type. | |
170 | The argument object is not altered--the value is a copy. */) | |
5842a27b | 171 | (Lisp_Object obj) |
dcfdbac7 JB |
172 | { |
173 | return casify_object (CASE_CAPITALIZE, obj); | |
174 | } | |
96927ba4 | 175 | |
2371fad4 KH |
176 | /* Like Fcapitalize but change only the initials. */ |
177 | ||
a7ca3326 | 178 | DEFUN ("upcase-initials", Fupcase_initials, Supcase_initials, 1, 1, 0, |
fdb82f93 PJ |
179 | doc: /* Convert the initial of each word in the argument to upper case. |
180 | Do not change the other letters of each word. | |
181 | The argument may be a character or string. The result has the same type. | |
182 | The argument object is not altered--the value is a copy. */) | |
5842a27b | 183 | (Lisp_Object obj) |
8cef1f78 RS |
184 | { |
185 | return casify_object (CASE_CAPITALIZE_UP, obj); | |
186 | } | |
dcfdbac7 JB |
187 | \f |
188 | /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP. | |
189 | b and e specify range of buffer to operate on. */ | |
190 | ||
181aa2be | 191 | static void |
971de7fb | 192 | casify_region (enum case_action flag, Lisp_Object b, Lisp_Object e) |
dcfdbac7 | 193 | { |
17c05d74 PE |
194 | int c; |
195 | bool inword = flag == CASE_DOWN; | |
196 | bool multibyte = !NILP (BVAR (current_buffer, enable_multibyte_characters)); | |
d311d28c PE |
197 | ptrdiff_t start, end; |
198 | ptrdiff_t start_byte; | |
e45a141a PE |
199 | |
200 | /* Position of first and last changes. */ | |
d311d28c | 201 | ptrdiff_t first = -1, last IF_LINT (= 0); |
e45a141a | 202 | |
d311d28c PE |
203 | ptrdiff_t opoint = PT; |
204 | ptrdiff_t opoint_byte = PT_BYTE; | |
dcfdbac7 JB |
205 | |
206 | if (EQ (b, e)) | |
207 | /* Not modifying because nothing marked */ | |
208 | return; | |
209 | ||
bd47bd35 | 210 | /* If the case table is flagged as modified, rescan it. */ |
4b4deea2 TT |
211 | if (NILP (XCHAR_TABLE (BVAR (current_buffer, downcase_table))->extras[1])) |
212 | Fset_case_table (BVAR (current_buffer, downcase_table)); | |
bd47bd35 | 213 | |
dcfdbac7 | 214 | validate_region (&b, &e); |
2371fad4 KH |
215 | start = XFASTINT (b); |
216 | end = XFASTINT (e); | |
20edc1c9 | 217 | modify_region_1 (start, end, false); |
2371fad4 | 218 | record_change (start, end - start); |
4c7b7eab | 219 | start_byte = CHAR_TO_BYTE (start); |
dcfdbac7 | 220 | |
5e617bc2 | 221 | SETUP_BUFFER_SYNTAX_TABLE (); /* For syntax_prefix_flag_p. */ |
c785836d | 222 | |
2422e50a | 223 | while (start < end) |
a04538da | 224 | { |
2422e50a KH |
225 | int c2, len; |
226 | ||
227 | if (multibyte) | |
228 | { | |
229 | c = FETCH_MULTIBYTE_CHAR (start_byte); | |
230 | len = CHAR_BYTES (c); | |
231 | } | |
232 | else | |
233 | { | |
234 | c = FETCH_BYTE (start_byte); | |
235 | MAKE_CHAR_MULTIBYTE (c); | |
236 | len = 1; | |
237 | } | |
238 | c2 = c; | |
a0615d90 | 239 | if (inword && flag != CASE_CAPITALIZE_UP) |
5da9919f PE |
240 | c = downcase (c); |
241 | else if (!uppercasep (c) | |
a0615d90 | 242 | && (!inword || flag != CASE_CAPITALIZE_UP)) |
5da9919f | 243 | c = upcase1 (c); |
a0615d90 | 244 | if ((int) flag >= (int) CASE_CAPITALIZE) |
c5683ceb SM |
245 | inword = ((SYNTAX (c) == Sword) |
246 | && (inword || !syntax_prefix_flag_p (c))); | |
2422e50a | 247 | if (c != c2) |
a04538da | 248 | { |
7927d8e3 SM |
249 | last = start; |
250 | if (first < 0) | |
251 | first = start; | |
252 | ||
2422e50a KH |
253 | if (! multibyte) |
254 | { | |
255 | MAKE_CHAR_UNIBYTE (c); | |
256 | FETCH_BYTE (start_byte) = c; | |
257 | } | |
258 | else if (ASCII_CHAR_P (c2) && ASCII_CHAR_P (c)) | |
259 | FETCH_BYTE (start_byte) = c; | |
08588bfa | 260 | else |
a04538da | 261 | { |
08588bfa | 262 | int tolen = CHAR_BYTES (c); |
2422e50a | 263 | int j; |
66da2880 | 264 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
a04538da | 265 | |
2422e50a | 266 | CHAR_STRING (c, str); |
08588bfa KH |
267 | if (len == tolen) |
268 | { | |
269 | /* Length is unchanged. */ | |
270 | for (j = 0; j < len; ++j) | |
271 | FETCH_BYTE (start_byte + j) = str[j]; | |
272 | } | |
273 | else | |
274 | { | |
275 | /* Replace one character with the other, | |
276 | keeping text properties the same. */ | |
277 | replace_range_2 (start, start_byte, | |
278 | start + 1, start_byte + len, | |
47ce90e4 | 279 | (char *) str, 1, tolen, |
08588bfa KH |
280 | 0); |
281 | len = tolen; | |
282 | } | |
a04538da | 283 | } |
a04538da | 284 | } |
2422e50a KH |
285 | start++; |
286 | start_byte += len; | |
dcfdbac7 JB |
287 | } |
288 | ||
8f924df7 KH |
289 | if (PT != opoint) |
290 | TEMP_SET_PT_BOTH (opoint, opoint_byte); | |
291 | ||
7927d8e3 | 292 | if (first >= 0) |
66da2880 | 293 | { |
7927d8e3 SM |
294 | signal_after_change (first, last + 1 - first, last + 1 - first); |
295 | update_compositions (first, last + 1, CHECK_ALL); | |
66da2880 | 296 | } |
dcfdbac7 JB |
297 | } |
298 | ||
a7ca3326 | 299 | DEFUN ("upcase-region", Fupcase_region, Supcase_region, 2, 2, "r", |
fdb82f93 PJ |
300 | doc: /* Convert the region to upper case. In programs, wants two arguments. |
301 | These arguments specify the starting and ending character numbers of | |
302 | the region to operate on. When used as a command, the text between | |
303 | point and the mark is operated on. | |
304 | See also `capitalize-region'. */) | |
5842a27b | 305 | (Lisp_Object beg, Lisp_Object end) |
dcfdbac7 | 306 | { |
8c22d56c | 307 | casify_region (CASE_UP, beg, end); |
dcfdbac7 JB |
308 | return Qnil; |
309 | } | |
310 | ||
311 | DEFUN ("downcase-region", Fdowncase_region, Sdowncase_region, 2, 2, "r", | |
fdb82f93 PJ |
312 | doc: /* Convert the region to lower case. In programs, wants two arguments. |
313 | These arguments specify the starting and ending character numbers of | |
314 | the region to operate on. When used as a command, the text between | |
315 | point and the mark is operated on. */) | |
5842a27b | 316 | (Lisp_Object beg, Lisp_Object end) |
dcfdbac7 | 317 | { |
8c22d56c | 318 | casify_region (CASE_DOWN, beg, end); |
dcfdbac7 JB |
319 | return Qnil; |
320 | } | |
321 | ||
322 | DEFUN ("capitalize-region", Fcapitalize_region, Scapitalize_region, 2, 2, "r", | |
fdb82f93 PJ |
323 | doc: /* Convert the region to capitalized form. |
324 | Capitalized form means each word's first character is upper case | |
325 | and the rest of it is lower case. | |
326 | In programs, give two arguments, the starting and ending | |
327 | character positions to operate on. */) | |
5842a27b | 328 | (Lisp_Object beg, Lisp_Object end) |
dcfdbac7 | 329 | { |
8c22d56c | 330 | casify_region (CASE_CAPITALIZE, beg, end); |
dcfdbac7 JB |
331 | return Qnil; |
332 | } | |
333 | ||
2371fad4 KH |
334 | /* Like Fcapitalize_region but change only the initials. */ |
335 | ||
a7ca3326 | 336 | DEFUN ("upcase-initials-region", Fupcase_initials_region, |
8cef1f78 | 337 | Supcase_initials_region, 2, 2, "r", |
fdb82f93 PJ |
338 | doc: /* Upcase the initial of each word in the region. |
339 | Subsequent letters of each word are not changed. | |
340 | In programs, give two arguments, the starting and ending | |
341 | character positions to operate on. */) | |
5842a27b | 342 | (Lisp_Object beg, Lisp_Object end) |
8cef1f78 | 343 | { |
8c22d56c | 344 | casify_region (CASE_CAPITALIZE_UP, beg, end); |
8cef1f78 RS |
345 | return Qnil; |
346 | } | |
dcfdbac7 | 347 | \f |
438eba3c | 348 | static Lisp_Object |
d311d28c | 349 | operate_on_word (Lisp_Object arg, ptrdiff_t *newpoint) |
dcfdbac7 | 350 | { |
39fb55ff | 351 | Lisp_Object val; |
d311d28c | 352 | ptrdiff_t farend; |
4f3a2f8d | 353 | EMACS_INT iarg; |
dcfdbac7 | 354 | |
b7826503 | 355 | CHECK_NUMBER (arg); |
2371fad4 | 356 | iarg = XINT (arg); |
6ec8bbd2 | 357 | farend = scan_words (PT, iarg); |
dcfdbac7 | 358 | if (!farend) |
2371fad4 | 359 | farend = iarg > 0 ? ZV : BEGV; |
dcfdbac7 | 360 | |
6ec8bbd2 | 361 | *newpoint = PT > farend ? PT : farend; |
18e23fd0 | 362 | XSETFASTINT (val, farend); |
dcfdbac7 JB |
363 | |
364 | return val; | |
365 | } | |
366 | ||
367 | DEFUN ("upcase-word", Fupcase_word, Supcase_word, 1, 1, "p", | |
fdb82f93 PJ |
368 | doc: /* Convert following word (or ARG words) to upper case, moving over. |
369 | With negative argument, convert previous words but do not move. | |
370 | See also `capitalize-word'. */) | |
5842a27b | 371 | (Lisp_Object arg) |
dcfdbac7 | 372 | { |
34628a90 | 373 | Lisp_Object beg, end; |
d311d28c | 374 | ptrdiff_t newpoint; |
6ec8bbd2 | 375 | XSETFASTINT (beg, PT); |
34628a90 RS |
376 | end = operate_on_word (arg, &newpoint); |
377 | casify_region (CASE_UP, beg, end); | |
378 | SET_PT (newpoint); | |
dcfdbac7 JB |
379 | return Qnil; |
380 | } | |
381 | ||
382 | DEFUN ("downcase-word", Fdowncase_word, Sdowncase_word, 1, 1, "p", | |
fdb82f93 PJ |
383 | doc: /* Convert following word (or ARG words) to lower case, moving over. |
384 | With negative argument, convert previous words but do not move. */) | |
5842a27b | 385 | (Lisp_Object arg) |
dcfdbac7 | 386 | { |
34628a90 | 387 | Lisp_Object beg, end; |
d311d28c | 388 | ptrdiff_t newpoint; |
6ec8bbd2 | 389 | XSETFASTINT (beg, PT); |
34628a90 RS |
390 | end = operate_on_word (arg, &newpoint); |
391 | casify_region (CASE_DOWN, beg, end); | |
392 | SET_PT (newpoint); | |
dcfdbac7 JB |
393 | return Qnil; |
394 | } | |
395 | ||
396 | DEFUN ("capitalize-word", Fcapitalize_word, Scapitalize_word, 1, 1, "p", | |
fdb82f93 PJ |
397 | doc: /* Capitalize the following word (or ARG words), moving over. |
398 | This gives the word(s) a first character in upper case | |
399 | and the rest lower case. | |
400 | With negative argument, capitalize previous words but do not move. */) | |
5842a27b | 401 | (Lisp_Object arg) |
dcfdbac7 | 402 | { |
34628a90 | 403 | Lisp_Object beg, end; |
d311d28c | 404 | ptrdiff_t newpoint; |
6ec8bbd2 | 405 | XSETFASTINT (beg, PT); |
34628a90 RS |
406 | end = operate_on_word (arg, &newpoint); |
407 | casify_region (CASE_CAPITALIZE, beg, end); | |
408 | SET_PT (newpoint); | |
dcfdbac7 JB |
409 | return Qnil; |
410 | } | |
411 | \f | |
dfcf069d | 412 | void |
971de7fb | 413 | syms_of_casefiddle (void) |
dcfdbac7 | 414 | { |
cd3520a4 | 415 | DEFSYM (Qidentity, "identity"); |
dcfdbac7 JB |
416 | defsubr (&Supcase); |
417 | defsubr (&Sdowncase); | |
418 | defsubr (&Scapitalize); | |
8cef1f78 | 419 | defsubr (&Supcase_initials); |
dcfdbac7 JB |
420 | defsubr (&Supcase_region); |
421 | defsubr (&Sdowncase_region); | |
422 | defsubr (&Scapitalize_region); | |
8cef1f78 | 423 | defsubr (&Supcase_initials_region); |
dcfdbac7 JB |
424 | defsubr (&Supcase_word); |
425 | defsubr (&Sdowncase_word); | |
426 | defsubr (&Scapitalize_word); | |
427 | } | |
428 | ||
dfcf069d | 429 | void |
971de7fb | 430 | keys_of_casefiddle (void) |
dcfdbac7 | 431 | { |
5e617bc2 | 432 | initial_define_key (control_x_map, Ctl ('U'), "upcase-region"); |
d427b66a | 433 | Fput (intern ("upcase-region"), Qdisabled, Qt); |
5e617bc2 | 434 | initial_define_key (control_x_map, Ctl ('L'), "downcase-region"); |
d427b66a JB |
435 | Fput (intern ("downcase-region"), Qdisabled, Qt); |
436 | ||
dcfdbac7 JB |
437 | initial_define_key (meta_map, 'u', "upcase-word"); |
438 | initial_define_key (meta_map, 'l', "downcase-word"); | |
439 | initial_define_key (meta_map, 'c', "capitalize-word"); | |
440 | } |