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cd645247 | 1 | /* Simple built-in editing commands. |
3a22ee35 | 2 | Copyright (C) 1985, 1993, 1994 Free Software Foundation, Inc. |
cd645247 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 | |
502ddf23 | 8 | the Free Software Foundation; either version 2, or (at your option) |
cd645247 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 | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
18160b98 | 21 | #include <config.h> |
cd645247 JB |
22 | #include "lisp.h" |
23 | #include "commands.h" | |
24 | #include "buffer.h" | |
25 | #include "syntax.h" | |
f109dfa2 | 26 | #include "window.h" |
cd645247 JB |
27 | |
28 | Lisp_Object Qkill_forward_chars, Qkill_backward_chars, Vblink_paren_function; | |
29 | ||
6bbb0d4a JB |
30 | /* A possible value for a buffer's overwrite-mode variable. */ |
31 | Lisp_Object Qoverwrite_mode_binary; | |
32 | ||
cd645247 JB |
33 | \f |
34 | DEFUN ("forward-char", Fforward_char, Sforward_char, 0, 1, "p", | |
35 | "Move point right ARG characters (left if ARG negative).\n\ | |
36 | On reaching end of buffer, stop and signal error.") | |
37 | (n) | |
38 | Lisp_Object n; | |
39 | { | |
265a9e55 | 40 | if (NILP (n)) |
48c7cef2 | 41 | XSETFASTINT (n, 1); |
cd645247 JB |
42 | else |
43 | CHECK_NUMBER (n, 0); | |
44 | ||
7b502dc3 JB |
45 | /* This used to just set point to point + XINT (n), and then check |
46 | to see if it was within boundaries. But now that SET_PT can | |
47 | potentially do a lot of stuff (calling entering and exiting | |
48 | hooks, etcetera), that's not a good approach. So we validate the | |
49 | proposed position, then set point. */ | |
50 | { | |
51 | int new_point = point + XINT (n); | |
52 | ||
53 | if (new_point < BEGV) | |
54 | { | |
55 | SET_PT (BEGV); | |
56 | Fsignal (Qbeginning_of_buffer, Qnil); | |
57 | } | |
58 | if (new_point > ZV) | |
59 | { | |
60 | SET_PT (ZV); | |
61 | Fsignal (Qend_of_buffer, Qnil); | |
62 | } | |
63 | ||
64 | SET_PT (new_point); | |
65 | } | |
66 | ||
cd645247 JB |
67 | return Qnil; |
68 | } | |
69 | ||
70 | DEFUN ("backward-char", Fbackward_char, Sbackward_char, 0, 1, "p", | |
71 | "Move point left ARG characters (right if ARG negative).\n\ | |
72 | On attempt to pass beginning or end of buffer, stop and signal error.") | |
73 | (n) | |
74 | Lisp_Object n; | |
75 | { | |
265a9e55 | 76 | if (NILP (n)) |
48c7cef2 | 77 | XSETFASTINT (n, 1); |
cd645247 JB |
78 | else |
79 | CHECK_NUMBER (n, 0); | |
80 | ||
81 | XSETINT (n, - XINT (n)); | |
82 | return Fforward_char (n); | |
83 | } | |
84 | ||
85 | DEFUN ("forward-line", Fforward_line, Sforward_line, 0, 1, "p", | |
86 | "Move ARG lines forward (backward if ARG is negative).\n\ | |
87 | Precisely, if point is on line I, move to the start of line I + ARG.\n\ | |
88 | If there isn't room, go as far as possible (no error).\n\ | |
89 | Returns the count of lines left to move. If moving forward,\n\ | |
90 | that is ARG - number of lines moved; if backward, ARG + number moved.\n\ | |
91 | With positive ARG, a non-empty line at the end counts as one line\n\ | |
92 | successfully moved (for the return value).") | |
93 | (n) | |
94 | Lisp_Object n; | |
95 | { | |
96 | int pos2 = point; | |
97 | int pos; | |
98 | int count, shortage, negp; | |
99 | ||
265a9e55 | 100 | if (NILP (n)) |
cd645247 JB |
101 | count = 1; |
102 | else | |
103 | { | |
104 | CHECK_NUMBER (n, 0); | |
105 | count = XINT (n); | |
106 | } | |
107 | ||
108 | negp = count <= 0; | |
4f5d0c3c | 109 | pos = scan_buffer ('\n', pos2, 0, count - negp, &shortage, 1); |
cd645247 JB |
110 | if (shortage > 0 |
111 | && (negp | |
502ddf23 JB |
112 | || (ZV > BEGV |
113 | && pos != pos2 | |
cd645247 JB |
114 | && FETCH_CHAR (pos - 1) != '\n'))) |
115 | shortage--; | |
116 | SET_PT (pos); | |
117 | return make_number (negp ? - shortage : shortage); | |
118 | } | |
119 | ||
120 | DEFUN ("beginning-of-line", Fbeginning_of_line, Sbeginning_of_line, | |
121 | 0, 1, "p", | |
122 | "Move point to beginning of current line.\n\ | |
123 | With argument ARG not nil or 1, move forward ARG - 1 lines first.\n\ | |
124 | If scan reaches end of buffer, stop there without error.") | |
125 | (n) | |
126 | Lisp_Object n; | |
127 | { | |
265a9e55 | 128 | if (NILP (n)) |
48c7cef2 | 129 | XSETFASTINT (n, 1); |
cd645247 JB |
130 | else |
131 | CHECK_NUMBER (n, 0); | |
132 | ||
133 | Fforward_line (make_number (XINT (n) - 1)); | |
134 | return Qnil; | |
135 | } | |
136 | ||
137 | DEFUN ("end-of-line", Fend_of_line, Send_of_line, | |
138 | 0, 1, "p", | |
139 | "Move point to end of current line.\n\ | |
140 | With argument ARG not nil or 1, move forward ARG - 1 lines first.\n\ | |
141 | If scan reaches end of buffer, stop there without error.") | |
142 | (n) | |
143 | Lisp_Object n; | |
144 | { | |
145 | register int pos; | |
146 | register int stop; | |
147 | ||
265a9e55 | 148 | if (NILP (n)) |
48c7cef2 | 149 | XSETFASTINT (n, 1); |
cd645247 JB |
150 | else |
151 | CHECK_NUMBER (n, 0); | |
152 | ||
4f5d0c3c | 153 | SET_PT (find_before_next_newline (PT, 0, XINT (n) - (XINT (n) <= 0))); |
cd645247 JB |
154 | |
155 | return Qnil; | |
156 | } | |
157 | ||
158 | DEFUN ("delete-char", Fdelete_char, Sdelete_char, 1, 2, "p\nP", | |
159 | "Delete the following ARG characters (previous, with negative arg).\n\ | |
160 | Optional second arg KILLFLAG non-nil means kill instead (save in kill ring).\n\ | |
161 | Interactively, ARG is the prefix arg, and KILLFLAG is set if\n\ | |
162 | ARG was explicitly specified.") | |
163 | (n, killflag) | |
164 | Lisp_Object n, killflag; | |
165 | { | |
166 | CHECK_NUMBER (n, 0); | |
167 | ||
265a9e55 | 168 | if (NILP (killflag)) |
cd645247 JB |
169 | { |
170 | if (XINT (n) < 0) | |
171 | { | |
172 | if (point + XINT (n) < BEGV) | |
173 | Fsignal (Qbeginning_of_buffer, Qnil); | |
174 | else | |
175 | del_range (point + XINT (n), point); | |
176 | } | |
177 | else | |
178 | { | |
179 | if (point + XINT (n) > ZV) | |
180 | Fsignal (Qend_of_buffer, Qnil); | |
181 | else | |
182 | del_range (point, point + XINT (n)); | |
183 | } | |
184 | } | |
185 | else | |
186 | { | |
187 | call1 (Qkill_forward_chars, n); | |
188 | } | |
189 | return Qnil; | |
190 | } | |
191 | ||
192 | DEFUN ("delete-backward-char", Fdelete_backward_char, Sdelete_backward_char, | |
193 | 1, 2, "p\nP", | |
194 | "Delete the previous ARG characters (following, with negative ARG).\n\ | |
195 | Optional second arg KILLFLAG non-nil means kill instead (save in kill ring).\n\ | |
196 | Interactively, ARG is the prefix arg, and KILLFLAG is set if\n\ | |
197 | ARG was explicitly specified.") | |
198 | (n, killflag) | |
199 | Lisp_Object n, killflag; | |
200 | { | |
201 | CHECK_NUMBER (n, 0); | |
202 | return Fdelete_char (make_number (-XINT (n)), killflag); | |
203 | } | |
204 | ||
205 | DEFUN ("self-insert-command", Fself_insert_command, Sself_insert_command, 1, 1, "p", | |
206 | "Insert the character you type.\n\ | |
207 | Whichever character you type to run this command is inserted.") | |
208 | (arg) | |
209 | Lisp_Object arg; | |
210 | { | |
211 | CHECK_NUMBER (arg, 0); | |
212 | ||
213 | /* Barf if the key that invoked this was not a character. */ | |
ed76f667 | 214 | if (!INTEGERP (last_command_char)) |
cd645247 JB |
215 | bitch_at_user (); |
216 | else | |
217 | while (XINT (arg) > 0) | |
218 | { | |
f58dd69b KH |
219 | /* Ok since old and new vals both nonneg */ |
220 | XSETFASTINT (arg, XFASTINT (arg) - 1); | |
cd645247 JB |
221 | internal_self_insert (XINT (last_command_char), XFASTINT (arg) != 0); |
222 | } | |
223 | ||
224 | return Qnil; | |
225 | } | |
226 | ||
227 | DEFUN ("newline", Fnewline, Snewline, 0, 1, "P", | |
228 | "Insert a newline. With arg, insert that many newlines.\n\ | |
229 | In Auto Fill mode, if no numeric arg, break the preceding line if it's long.") | |
230 | (arg1) | |
231 | Lisp_Object arg1; | |
232 | { | |
233 | int flag; | |
234 | Lisp_Object arg; | |
235 | char c1 = '\n'; | |
236 | ||
237 | arg = Fprefix_numeric_value (arg1); | |
238 | ||
265a9e55 | 239 | if (!NILP (current_buffer->read_only)) |
69f19f89 | 240 | Fbarf_if_buffer_read_only (); |
cd645247 | 241 | |
c39e6cc2 | 242 | /* Inserting a newline at the end of a line produces better |
eb8c3be9 | 243 | redisplay in try_window_id than inserting at the beginning of a |
c39e6cc2 JB |
244 | line, and the textual result is the same. So, if we're at |
245 | beginning of line, pretend to be at the end of the previous line. | |
246 | ||
247 | We can't use internal_self_insert in that case since it won't do | |
248 | the insertion correctly. Luckily, internal_self_insert's special | |
249 | features all do nothing in that case. */ | |
cd645247 JB |
250 | |
251 | flag = point > BEGV && FETCH_CHAR (point - 1) == '\n'; | |
f109dfa2 RS |
252 | /* Don't do this if at the beginning of the window. */ |
253 | if (XBUFFER (XWINDOW (selected_window)->buffer) == current_buffer | |
254 | && marker_position (XWINDOW (selected_window)->start) == PT) | |
255 | flag = 0; | |
256 | ||
7c011261 | 257 | #ifdef USE_TEXT_PROPERTIES |
dbf8da39 RS |
258 | /* We cannot use this optimization if properties change |
259 | in the vicinity. | |
260 | ??? We need to check for change hook properties, etc. */ | |
261 | if (flag) | |
262 | if (! (point - 1 > BEGV && ! property_change_between_p (point - 2, point))) | |
263 | flag = 0; | |
7c011261 | 264 | #endif |
dbf8da39 RS |
265 | |
266 | if (flag) | |
267 | SET_PT (point - 1); | |
cd645247 JB |
268 | |
269 | while (XINT (arg) > 0) | |
270 | { | |
271 | if (flag) | |
dfb756b7 | 272 | insert_and_inherit (&c1, 1); |
cd645247 | 273 | else |
265a9e55 | 274 | internal_self_insert ('\n', !NILP (arg1)); |
f58dd69b KH |
275 | /* Ok since old and new vals both nonneg */ |
276 | XSETFASTINT (arg, XFASTINT (arg) - 1); | |
cd645247 JB |
277 | } |
278 | ||
279 | if (flag) | |
280 | SET_PT (point + 1); | |
281 | ||
282 | return Qnil; | |
283 | } | |
284 | ||
4c6e656f RS |
285 | /* Insert character C1. If NOAUTOFILL is nonzero, don't do autofill |
286 | even if it is enabled. | |
287 | ||
288 | If this insertion is suitable for direct output (completely simple), | |
aa52fef9 RS |
289 | return 0. A value of 1 indicates this *might* not have been simple. |
290 | A value of 2 means this did things that call for an undo boundary. */ | |
4c6e656f | 291 | |
cd645247 JB |
292 | internal_self_insert (c1, noautofill) |
293 | char c1; | |
294 | int noautofill; | |
295 | { | |
296 | extern Lisp_Object Fexpand_abbrev (); | |
297 | int hairy = 0; | |
298 | Lisp_Object tem; | |
299 | register enum syntaxcode synt; | |
300 | register int c = c1; | |
e7aacab7 | 301 | Lisp_Object overwrite; |
cd645247 | 302 | |
e7aacab7 | 303 | overwrite = current_buffer->overwrite_mode; |
166a4263 RS |
304 | if (!NILP (Vbefore_change_function) || !NILP (Vafter_change_function) |
305 | || !NILP (Vbefore_change_functions) || !NILP (Vafter_change_functions)) | |
cd645247 JB |
306 | hairy = 1; |
307 | ||
6bbb0d4a | 308 | if (!NILP (overwrite) |
cd645247 | 309 | && point < ZV |
6bbb0d4a JB |
310 | && (EQ (overwrite, Qoverwrite_mode_binary) |
311 | || (c != '\n' && FETCH_CHAR (point) != '\n')) | |
312 | && (EQ (overwrite, Qoverwrite_mode_binary) | |
e686c647 | 313 | || FETCH_CHAR (point) != '\t' |
cd645247 | 314 | || XINT (current_buffer->tab_width) <= 0 |
2234dd63 | 315 | || XFASTINT (current_buffer->tab_width) > 20 |
cd645247 JB |
316 | || !((current_column () + 1) % XFASTINT (current_buffer->tab_width)))) |
317 | { | |
318 | del_range (point, point + 1); | |
aa52fef9 | 319 | hairy = 2; |
cd645247 | 320 | } |
265a9e55 | 321 | if (!NILP (current_buffer->abbrev_mode) |
cd645247 | 322 | && SYNTAX (c) != Sword |
265a9e55 | 323 | && NILP (current_buffer->read_only) |
cd645247 JB |
324 | && point > BEGV && SYNTAX (FETCH_CHAR (point - 1)) == Sword) |
325 | { | |
ee8caabb | 326 | int modiff = MODIFF; |
4c6e656f RS |
327 | Fexpand_abbrev (); |
328 | /* We can't trust the value of Fexpand_abbrev, | |
ee8caabb RS |
329 | but if Fexpand_abbrev changed the buffer, |
330 | assume it expanded something. */ | |
331 | if (MODIFF != modiff) | |
aa52fef9 | 332 | hairy = 2; |
cd645247 JB |
333 | } |
334 | if ((c == ' ' || c == '\n') | |
335 | && !noautofill | |
265a9e55 | 336 | && !NILP (current_buffer->auto_fill_function) |
cd645247 JB |
337 | && current_column () > XFASTINT (current_buffer->fill_column)) |
338 | { | |
339 | if (c1 != '\n') | |
b9a7407f | 340 | insert_and_inherit (&c1, 1); |
cd645247 JB |
341 | call0 (current_buffer->auto_fill_function); |
342 | if (c1 == '\n') | |
b9a7407f | 343 | insert_and_inherit (&c1, 1); |
aa52fef9 | 344 | hairy = 2; |
cd645247 JB |
345 | } |
346 | else | |
b9a7407f | 347 | insert_and_inherit (&c1, 1); |
cd645247 JB |
348 | synt = SYNTAX (c); |
349 | if ((synt == Sclose || synt == Smath) | |
265a9e55 | 350 | && !NILP (Vblink_paren_function) && INTERACTIVE) |
cd645247 JB |
351 | { |
352 | call0 (Vblink_paren_function); | |
aa52fef9 | 353 | hairy = 2; |
cd645247 JB |
354 | } |
355 | return hairy; | |
356 | } | |
357 | \f | |
358 | /* module initialization */ | |
359 | ||
360 | syms_of_cmds () | |
361 | { | |
362 | Qkill_backward_chars = intern ("kill-backward-chars"); | |
363 | staticpro (&Qkill_backward_chars); | |
364 | ||
365 | Qkill_forward_chars = intern ("kill-forward-chars"); | |
366 | staticpro (&Qkill_forward_chars); | |
367 | ||
6bbb0d4a JB |
368 | Qoverwrite_mode_binary = intern ("overwrite-mode-binary"); |
369 | staticpro (&Qoverwrite_mode_binary); | |
e686c647 | 370 | |
cd645247 JB |
371 | DEFVAR_LISP ("blink-paren-function", &Vblink_paren_function, |
372 | "Function called, if non-nil, whenever a close parenthesis is inserted.\n\ | |
373 | More precisely, a char with closeparen syntax is self-inserted."); | |
374 | Vblink_paren_function = Qnil; | |
375 | ||
376 | defsubr (&Sforward_char); | |
377 | defsubr (&Sbackward_char); | |
378 | defsubr (&Sforward_line); | |
379 | defsubr (&Sbeginning_of_line); | |
380 | defsubr (&Send_of_line); | |
381 | ||
382 | defsubr (&Sdelete_char); | |
383 | defsubr (&Sdelete_backward_char); | |
384 | ||
385 | defsubr (&Sself_insert_command); | |
386 | defsubr (&Snewline); | |
387 | } | |
388 | ||
389 | keys_of_cmds () | |
390 | { | |
391 | int n; | |
392 | ||
393 | initial_define_key (global_map, Ctl('M'), "newline"); | |
394 | initial_define_key (global_map, Ctl('I'), "self-insert-command"); | |
395 | for (n = 040; n < 0177; n++) | |
396 | initial_define_key (global_map, n, "self-insert-command"); | |
cf9cdc11 RS |
397 | #ifdef MSDOS |
398 | for (n = 0200; n < 0240; n++) | |
399 | initial_define_key (global_map, n, "self-insert-command"); | |
400 | #endif | |
94748cb9 | 401 | for (n = 0240; n < 0400; n++) |
eb46da6a | 402 | initial_define_key (global_map, n, "self-insert-command"); |
cd645247 JB |
403 | |
404 | initial_define_key (global_map, Ctl ('A'), "beginning-of-line"); | |
405 | initial_define_key (global_map, Ctl ('B'), "backward-char"); | |
406 | initial_define_key (global_map, Ctl ('D'), "delete-char"); | |
407 | initial_define_key (global_map, Ctl ('E'), "end-of-line"); | |
408 | initial_define_key (global_map, Ctl ('F'), "forward-char"); | |
409 | initial_define_key (global_map, 0177, "delete-backward-char"); | |
410 | } |