Commit | Line | Data |
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dcfdbac7 | 1 | /* GNU Emacs case conversion functions. |
3a22ee35 | 2 | Copyright (C) 1985, 1994 Free Software Foundation, Inc. |
dcfdbac7 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
7c938215 | 8 | the Free Software Foundation; either version 2, or (at your option) |
dcfdbac7 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
dcfdbac7 JB |
20 | |
21 | ||
18160b98 | 22 | #include <config.h> |
dcfdbac7 JB |
23 | #include "lisp.h" |
24 | #include "buffer.h" | |
a04538da | 25 | #include "charset.h" |
dcfdbac7 JB |
26 | #include "commands.h" |
27 | #include "syntax.h" | |
28 | ||
29 | enum case_action {CASE_UP, CASE_DOWN, CASE_CAPITALIZE, CASE_CAPITALIZE_UP}; | |
a04538da KH |
30 | |
31 | Lisp_Object Qidentity; | |
dcfdbac7 JB |
32 | \f |
33 | Lisp_Object | |
34 | casify_object (flag, obj) | |
35 | enum case_action flag; | |
36 | Lisp_Object obj; | |
37 | { | |
38 | register int i, c, len; | |
39 | register int inword = flag == CASE_DOWN; | |
a04538da | 40 | Lisp_Object tem; |
dcfdbac7 | 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 | ||
dcfdbac7 JB |
46 | while (1) |
47 | { | |
9d05e3d4 | 48 | if (INTEGERP (obj)) |
dcfdbac7 | 49 | { |
2e34157c | 50 | c = DOWNCASE (XFASTINT (obj)); |
5dd4d40a KH |
51 | if (inword) |
52 | XSETFASTINT (obj, c); | |
53 | else if (c == XFASTINT (obj)) | |
54 | { | |
2e34157c | 55 | c = UPCASE1 (XFASTINT (obj)); |
5dd4d40a KH |
56 | XSETFASTINT (obj, c); |
57 | } | |
dcfdbac7 JB |
58 | return obj; |
59 | } | |
9d05e3d4 | 60 | if (STRINGP (obj)) |
dcfdbac7 | 61 | { |
a0615d90 KH |
62 | int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
63 | ||
dcfdbac7 JB |
64 | obj = Fcopy_sequence (obj); |
65 | len = XSTRING (obj)->size; | |
66 | for (i = 0; i < len; i++) | |
67 | { | |
68 | c = XSTRING (obj)->data[i]; | |
a0615d90 KH |
69 | if (multibyte && c >= 0x80) |
70 | /* A multibyte character can't be handled in this | |
71 | simple loop. */ | |
72 | break; | |
96927ba4 | 73 | if (inword && flag != CASE_CAPITALIZE_UP) |
dcfdbac7 | 74 | c = DOWNCASE (c); |
96927ba4 RS |
75 | else if (!UPPERCASEP (c) |
76 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
dcfdbac7 JB |
77 | c = UPCASE1 (c); |
78 | XSTRING (obj)->data[i] = c; | |
96927ba4 | 79 | if ((int) flag >= (int) CASE_CAPITALIZE) |
dcfdbac7 JB |
80 | inword = SYNTAX (c) == Sword; |
81 | } | |
a0615d90 KH |
82 | if (i < len) |
83 | { | |
84 | /* The work is not yet finished because of a multibyte | |
85 | character just encountered. */ | |
86 | int fromlen, tolen, j = i; | |
87 | char *buf | |
88 | = (char *) alloca ((len - i) * MAX_LENGTH_OF_MULTI_BYTE_FORM | |
89 | + i); | |
90 | char *str, workbuf[4]; | |
91 | ||
92 | /* Copy data already handled. */ | |
93 | bcopy (XSTRING (obj)->data, buf, i); | |
94 | ||
95 | while (i < len) | |
96 | { | |
97 | c = STRING_CHAR_AND_LENGTH (XSTRING (obj)->data + i, | |
98 | len - i, fromlen); | |
99 | if (inword && flag != CASE_CAPITALIZE_UP) | |
100 | c = DOWNCASE (c); | |
101 | else if (!UPPERCASEP (c) | |
102 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
103 | c = UPCASE1 (c); | |
104 | tolen = CHAR_STRING (c, workbuf, str); | |
105 | bcopy (str, buf + j, tolen); | |
106 | i += fromlen; | |
107 | j += tolen; | |
108 | if ((int) flag >= (int) CASE_CAPITALIZE) | |
109 | inword = SYNTAX (c) == Sword; | |
110 | } | |
111 | obj = make_string (buf, j); | |
112 | } | |
dcfdbac7 JB |
113 | return obj; |
114 | } | |
b37902c8 | 115 | obj = wrong_type_argument (Qchar_or_string_p, obj); |
dcfdbac7 JB |
116 | } |
117 | } | |
118 | ||
119 | DEFUN ("upcase", Fupcase, Supcase, 1, 1, 0, | |
120 | "Convert argument to upper case and return that.\n\ | |
121 | The argument may be a character or string. The result has the same type.\n\ | |
8cef1f78 RS |
122 | The argument object is not altered--the value is a copy.\n\ |
123 | See also `capitalize', `downcase' and `upcase-initials'.") | |
dcfdbac7 JB |
124 | (obj) |
125 | Lisp_Object obj; | |
126 | { | |
127 | return casify_object (CASE_UP, obj); | |
128 | } | |
129 | ||
130 | DEFUN ("downcase", Fdowncase, Sdowncase, 1, 1, 0, | |
131 | "Convert argument to lower case and return that.\n\ | |
132 | The argument may be a character or string. The result has the same type.\n\ | |
8cef1f78 | 133 | The argument object is not altered--the value is a copy.") |
dcfdbac7 JB |
134 | (obj) |
135 | Lisp_Object obj; | |
136 | { | |
137 | return casify_object (CASE_DOWN, obj); | |
138 | } | |
139 | ||
140 | DEFUN ("capitalize", Fcapitalize, Scapitalize, 1, 1, 0, | |
141 | "Convert argument to capitalized form and return that.\n\ | |
142 | This means that each word's first character is upper case\n\ | |
143 | and the rest is lower case.\n\ | |
144 | The argument may be a character or string. The result has the same type.\n\ | |
8cef1f78 | 145 | The argument object is not altered--the value is a copy.") |
dcfdbac7 JB |
146 | (obj) |
147 | Lisp_Object obj; | |
148 | { | |
149 | return casify_object (CASE_CAPITALIZE, obj); | |
150 | } | |
96927ba4 | 151 | |
2371fad4 KH |
152 | /* Like Fcapitalize but change only the initials. */ |
153 | ||
8cef1f78 RS |
154 | DEFUN ("upcase-initials", Fupcase_initials, Supcase_initials, 1, 1, 0, |
155 | "Convert the initial of each word in the argument to upper case.\n\ | |
156 | Do not change the other letters of each word.\n\ | |
157 | The argument may be a character or string. The result has the same type.\n\ | |
158 | The argument object is not altered--the value is a copy.") | |
159 | (obj) | |
160 | Lisp_Object obj; | |
161 | { | |
162 | return casify_object (CASE_CAPITALIZE_UP, obj); | |
163 | } | |
dcfdbac7 JB |
164 | \f |
165 | /* flag is CASE_UP, CASE_DOWN or CASE_CAPITALIZE or CASE_CAPITALIZE_UP. | |
166 | b and e specify range of buffer to operate on. */ | |
167 | ||
168 | casify_region (flag, b, e) | |
169 | enum case_action flag; | |
170 | Lisp_Object b, e; | |
171 | { | |
172 | register int i; | |
173 | register int c; | |
174 | register int inword = flag == CASE_DOWN; | |
a0615d90 | 175 | register int multibyte = !NILP (current_buffer->enable_multibyte_characters); |
2371fad4 | 176 | int start, end; |
a04538da | 177 | Lisp_Object ch, downch, val; |
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); | |
190 | modify_region (current_buffer, start, end); | |
191 | record_change (start, end - start); | |
dcfdbac7 | 192 | |
a0615d90 | 193 | for (i = start; i < end; i++) |
a04538da | 194 | { |
a0615d90 KH |
195 | c = FETCH_BYTE (i); |
196 | if (multibyte && c >= 0x80) | |
197 | /* A multibyte character can't be handled in this simple loop. */ | |
198 | break; | |
199 | if (inword && flag != CASE_CAPITALIZE_UP) | |
200 | c = DOWNCASE (c); | |
201 | else if (!UPPERCASEP (c) | |
202 | && (!inword || flag != CASE_CAPITALIZE_UP)) | |
203 | c = UPCASE1 (c); | |
204 | FETCH_BYTE (i) = c; | |
205 | if ((int) flag >= (int) CASE_CAPITALIZE) | |
206 | inword = SYNTAX (c) == Sword; | |
a04538da | 207 | } |
a0615d90 | 208 | if (i < end) |
dcfdbac7 | 209 | { |
a0615d90 KH |
210 | /* The work is not yet finished because of a multibyte character |
211 | just encountered. */ | |
212 | int opoint = PT, c2; | |
a04538da | 213 | |
a0615d90 | 214 | while (i < end) |
a04538da | 215 | { |
a0615d90 KH |
216 | if ((c = FETCH_BYTE (i)) >= 0x80) |
217 | c = FETCH_MULTIBYTE_CHAR (i); | |
218 | c2 = c; | |
a04538da | 219 | if (inword && flag != CASE_CAPITALIZE_UP) |
a0615d90 KH |
220 | c2 = DOWNCASE (c); |
221 | else if (!UPPERCASEP (c) | |
a04538da | 222 | && (!inword || flag != CASE_CAPITALIZE_UP)) |
a0615d90 KH |
223 | c2 = UPCASE1 (c); |
224 | if (c != c2) | |
a04538da KH |
225 | { |
226 | int fromlen, tolen, j; | |
227 | char workbuf[4], *str; | |
228 | ||
a04538da | 229 | /* Handle the most likely case */ |
a0615d90 KH |
230 | if (c < 0400 && c2 < 0400) |
231 | FETCH_BYTE (i) = c2; | |
a04538da | 232 | else if (fromlen = CHAR_STRING (c, workbuf, str), |
a0615d90 | 233 | tolen = CHAR_STRING (c2, workbuf, str), |
a04538da KH |
234 | fromlen == tolen) |
235 | { | |
236 | for (j = 0; j < tolen; ++j) | |
237 | FETCH_BYTE (i + j) = str[j]; | |
238 | } | |
239 | else | |
240 | { | |
241 | error ("Can't casify letters that change length"); | |
242 | #if 0 /* This is approximately what we'd like to be able to do here */ | |
243 | if (tolen < fromlen) | |
244 | del_range_1 (i + tolen, i + fromlen, 0); | |
245 | else if (tolen > fromlen) | |
246 | { | |
247 | TEMP_SET_PT (i + fromlen); | |
248 | insert_1 (str + fromlen, tolen - fromlen, 1, 0); | |
249 | } | |
250 | #endif | |
251 | } | |
252 | } | |
253 | if ((int) flag >= (int) CASE_CAPITALIZE) | |
a0615d90 | 254 | inword = SYNTAX (c2) == Sword; |
a04538da KH |
255 | INC_POS (i); |
256 | } | |
257 | TEMP_SET_PT (opoint); | |
dcfdbac7 JB |
258 | } |
259 | ||
2371fad4 | 260 | signal_after_change (start, end - start, end - start); |
dcfdbac7 JB |
261 | } |
262 | ||
263 | DEFUN ("upcase-region", Fupcase_region, Supcase_region, 2, 2, "r", | |
264 | "Convert the region to upper case. In programs, wants two arguments.\n\ | |
265 | These arguments specify the starting and ending character numbers of\n\ | |
266 | the region to operate on. When used as a command, the text between\n\ | |
267 | point and the mark is operated on.\n\ | |
268 | See also `capitalize-region'.") | |
8c22d56c EN |
269 | (beg, end) |
270 | Lisp_Object beg, end; | |
dcfdbac7 | 271 | { |
8c22d56c | 272 | casify_region (CASE_UP, beg, end); |
dcfdbac7 JB |
273 | return Qnil; |
274 | } | |
275 | ||
276 | DEFUN ("downcase-region", Fdowncase_region, Sdowncase_region, 2, 2, "r", | |
277 | "Convert the region to lower case. In programs, wants two arguments.\n\ | |
278 | These arguments specify the starting and ending character numbers of\n\ | |
279 | the region to operate on. When used as a command, the text between\n\ | |
280 | point and the mark is operated on.") | |
8c22d56c EN |
281 | (beg, end) |
282 | Lisp_Object beg, end; | |
dcfdbac7 | 283 | { |
8c22d56c | 284 | casify_region (CASE_DOWN, beg, end); |
dcfdbac7 JB |
285 | return Qnil; |
286 | } | |
287 | ||
288 | DEFUN ("capitalize-region", Fcapitalize_region, Scapitalize_region, 2, 2, "r", | |
289 | "Convert the region to capitalized form.\n\ | |
290 | Capitalized form means each word's first character is upper case\n\ | |
291 | and the rest of it is lower case.\n\ | |
292 | In programs, give two arguments, the starting and ending\n\ | |
293 | character positions to operate on.") | |
8c22d56c EN |
294 | (beg, end) |
295 | Lisp_Object beg, end; | |
dcfdbac7 | 296 | { |
8c22d56c | 297 | casify_region (CASE_CAPITALIZE, beg, end); |
dcfdbac7 JB |
298 | return Qnil; |
299 | } | |
300 | ||
2371fad4 KH |
301 | /* Like Fcapitalize_region but change only the initials. */ |
302 | ||
8cef1f78 RS |
303 | DEFUN ("upcase-initials-region", Fupcase_initials_region, |
304 | Supcase_initials_region, 2, 2, "r", | |
305 | "Upcase the initial of each word in the region.\n\ | |
306 | Subsequent letters of each word are not changed.\n\ | |
307 | In programs, give two arguments, the starting and ending\n\ | |
308 | character positions to operate on.") | |
8c22d56c EN |
309 | (beg, end) |
310 | Lisp_Object beg, end; | |
8cef1f78 | 311 | { |
8c22d56c | 312 | casify_region (CASE_CAPITALIZE_UP, beg, end); |
8cef1f78 RS |
313 | return Qnil; |
314 | } | |
dcfdbac7 JB |
315 | \f |
316 | Lisp_Object | |
34628a90 | 317 | operate_on_word (arg, newpoint) |
dcfdbac7 | 318 | Lisp_Object arg; |
34628a90 | 319 | int *newpoint; |
dcfdbac7 | 320 | { |
39fb55ff | 321 | Lisp_Object val; |
34628a90 | 322 | int farend; |
2371fad4 | 323 | int iarg; |
dcfdbac7 JB |
324 | |
325 | CHECK_NUMBER (arg, 0); | |
2371fad4 | 326 | iarg = XINT (arg); |
6ec8bbd2 | 327 | farend = scan_words (PT, iarg); |
dcfdbac7 | 328 | if (!farend) |
2371fad4 | 329 | farend = iarg > 0 ? ZV : BEGV; |
dcfdbac7 | 330 | |
6ec8bbd2 | 331 | *newpoint = PT > farend ? PT : farend; |
18e23fd0 | 332 | XSETFASTINT (val, farend); |
dcfdbac7 JB |
333 | |
334 | return val; | |
335 | } | |
336 | ||
337 | DEFUN ("upcase-word", Fupcase_word, Supcase_word, 1, 1, "p", | |
338 | "Convert following word (or ARG words) to upper case, moving over.\n\ | |
339 | With negative argument, convert previous words but do not move.\n\ | |
340 | See also `capitalize-word'.") | |
341 | (arg) | |
342 | Lisp_Object arg; | |
343 | { | |
34628a90 RS |
344 | Lisp_Object beg, end; |
345 | int newpoint; | |
6ec8bbd2 | 346 | XSETFASTINT (beg, PT); |
34628a90 RS |
347 | end = operate_on_word (arg, &newpoint); |
348 | casify_region (CASE_UP, beg, end); | |
349 | SET_PT (newpoint); | |
dcfdbac7 JB |
350 | return Qnil; |
351 | } | |
352 | ||
353 | DEFUN ("downcase-word", Fdowncase_word, Sdowncase_word, 1, 1, "p", | |
354 | "Convert following word (or ARG words) to lower case, moving over.\n\ | |
355 | With negative argument, convert previous words but do not move.") | |
356 | (arg) | |
357 | Lisp_Object arg; | |
358 | { | |
34628a90 RS |
359 | Lisp_Object beg, end; |
360 | int newpoint; | |
6ec8bbd2 | 361 | XSETFASTINT (beg, PT); |
34628a90 RS |
362 | end = operate_on_word (arg, &newpoint); |
363 | casify_region (CASE_DOWN, beg, end); | |
364 | SET_PT (newpoint); | |
dcfdbac7 JB |
365 | return Qnil; |
366 | } | |
367 | ||
368 | DEFUN ("capitalize-word", Fcapitalize_word, Scapitalize_word, 1, 1, "p", | |
369 | "Capitalize the following word (or ARG words), moving over.\n\ | |
370 | This gives the word(s) a first character in upper case\n\ | |
371 | and the rest lower case.\n\ | |
372 | With negative argument, capitalize previous words but do not move.") | |
373 | (arg) | |
374 | Lisp_Object arg; | |
375 | { | |
34628a90 RS |
376 | Lisp_Object beg, end; |
377 | int newpoint; | |
6ec8bbd2 | 378 | XSETFASTINT (beg, PT); |
34628a90 RS |
379 | end = operate_on_word (arg, &newpoint); |
380 | casify_region (CASE_CAPITALIZE, beg, end); | |
381 | SET_PT (newpoint); | |
dcfdbac7 JB |
382 | return Qnil; |
383 | } | |
384 | \f | |
385 | syms_of_casefiddle () | |
386 | { | |
a04538da KH |
387 | Qidentity = intern ("identity"); |
388 | staticpro (&Qidentity); | |
dcfdbac7 JB |
389 | defsubr (&Supcase); |
390 | defsubr (&Sdowncase); | |
391 | defsubr (&Scapitalize); | |
8cef1f78 | 392 | defsubr (&Supcase_initials); |
dcfdbac7 JB |
393 | defsubr (&Supcase_region); |
394 | defsubr (&Sdowncase_region); | |
395 | defsubr (&Scapitalize_region); | |
8cef1f78 | 396 | defsubr (&Supcase_initials_region); |
dcfdbac7 JB |
397 | defsubr (&Supcase_word); |
398 | defsubr (&Sdowncase_word); | |
399 | defsubr (&Scapitalize_word); | |
400 | } | |
401 | ||
402 | keys_of_casefiddle () | |
403 | { | |
404 | initial_define_key (control_x_map, Ctl('U'), "upcase-region"); | |
d427b66a | 405 | Fput (intern ("upcase-region"), Qdisabled, Qt); |
dcfdbac7 | 406 | initial_define_key (control_x_map, Ctl('L'), "downcase-region"); |
d427b66a JB |
407 | Fput (intern ("downcase-region"), Qdisabled, Qt); |
408 | ||
dcfdbac7 JB |
409 | initial_define_key (meta_map, 'u', "upcase-word"); |
410 | initial_define_key (meta_map, 'l', "downcase-word"); | |
411 | initial_define_key (meta_map, 'c', "capitalize-word"); | |
412 | } |