Commit | Line | Data |
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cd645247 | 1 | /* Simple built-in editing commands. |
aa970069 | 2 | Copyright (C) 1985, 93, 94, 95, 1996 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 | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
cd645247 JB |
20 | |
21 | ||
18160b98 | 22 | #include <config.h> |
cd645247 JB |
23 | #include "lisp.h" |
24 | #include "commands.h" | |
25 | #include "buffer.h" | |
26 | #include "syntax.h" | |
f109dfa2 | 27 | #include "window.h" |
346e0c2d | 28 | #include "keyboard.h" |
cd645247 JB |
29 | |
30 | Lisp_Object Qkill_forward_chars, Qkill_backward_chars, Vblink_paren_function; | |
31 | ||
6bbb0d4a JB |
32 | /* A possible value for a buffer's overwrite-mode variable. */ |
33 | Lisp_Object Qoverwrite_mode_binary; | |
34 | ||
189fad68 RS |
35 | /* Non-nil means put this face on the next self-inserting character. */ |
36 | Lisp_Object Vself_insert_face; | |
37 | ||
38 | /* This is the command that set up Vself_insert_face. */ | |
39 | Lisp_Object Vself_insert_face_command; | |
40 | ||
189fad68 | 41 | extern Lisp_Object Qface; |
cd645247 JB |
42 | \f |
43 | DEFUN ("forward-char", Fforward_char, Sforward_char, 0, 1, "p", | |
72d5f589 | 44 | "Move point right N characters (left if N is negative).\n\ |
cd645247 | 45 | On reaching end of buffer, stop and signal error.") |
72d5f589 EN |
46 | (n) |
47 | Lisp_Object n; | |
cd645247 | 48 | { |
72d5f589 EN |
49 | if (NILP (n)) |
50 | XSETFASTINT (n, 1); | |
cd645247 | 51 | else |
72d5f589 | 52 | CHECK_NUMBER (n, 0); |
cd645247 | 53 | |
72d5f589 | 54 | /* This used to just set point to point + XINT (n), and then check |
7b502dc3 JB |
55 | to see if it was within boundaries. But now that SET_PT can |
56 | potentially do a lot of stuff (calling entering and exiting | |
57 | hooks, etcetera), that's not a good approach. So we validate the | |
58 | proposed position, then set point. */ | |
59 | { | |
72d5f589 | 60 | int new_point = point + XINT (n); |
7b502dc3 JB |
61 | |
62 | if (new_point < BEGV) | |
63 | { | |
64 | SET_PT (BEGV); | |
65 | Fsignal (Qbeginning_of_buffer, Qnil); | |
66 | } | |
67 | if (new_point > ZV) | |
68 | { | |
69 | SET_PT (ZV); | |
70 | Fsignal (Qend_of_buffer, Qnil); | |
71 | } | |
72 | ||
73 | SET_PT (new_point); | |
74 | } | |
75 | ||
cd645247 JB |
76 | return Qnil; |
77 | } | |
78 | ||
79 | DEFUN ("backward-char", Fbackward_char, Sbackward_char, 0, 1, "p", | |
72d5f589 | 80 | "Move point left N characters (right if N is negative).\n\ |
cd645247 | 81 | On attempt to pass beginning or end of buffer, stop and signal error.") |
72d5f589 EN |
82 | (n) |
83 | Lisp_Object n; | |
cd645247 | 84 | { |
72d5f589 EN |
85 | if (NILP (n)) |
86 | XSETFASTINT (n, 1); | |
cd645247 | 87 | else |
72d5f589 | 88 | CHECK_NUMBER (n, 0); |
cd645247 | 89 | |
72d5f589 EN |
90 | XSETINT (n, - XINT (n)); |
91 | return Fforward_char (n); | |
cd645247 JB |
92 | } |
93 | ||
94 | DEFUN ("forward-line", Fforward_line, Sforward_line, 0, 1, "p", | |
72d5f589 EN |
95 | "Move N lines forward (backward if N is negative).\n\ |
96 | Precisely, if point is on line I, move to the start of line I + N.\n\ | |
cd645247 JB |
97 | If there isn't room, go as far as possible (no error).\n\ |
98 | Returns the count of lines left to move. If moving forward,\n\ | |
72d5f589 EN |
99 | that is N - number of lines moved; if backward, N + number moved.\n\ |
100 | With positive N, a non-empty line at the end counts as one line\n\ | |
cd645247 JB |
101 | successfully moved (for the return value).") |
102 | (n) | |
103 | Lisp_Object n; | |
104 | { | |
105 | int pos2 = point; | |
106 | int pos; | |
107 | int count, shortage, negp; | |
108 | ||
265a9e55 | 109 | if (NILP (n)) |
cd645247 JB |
110 | count = 1; |
111 | else | |
112 | { | |
113 | CHECK_NUMBER (n, 0); | |
114 | count = XINT (n); | |
115 | } | |
116 | ||
117 | negp = count <= 0; | |
4f5d0c3c | 118 | pos = scan_buffer ('\n', pos2, 0, count - negp, &shortage, 1); |
cd645247 JB |
119 | if (shortage > 0 |
120 | && (negp | |
502ddf23 JB |
121 | || (ZV > BEGV |
122 | && pos != pos2 | |
cd645247 JB |
123 | && FETCH_CHAR (pos - 1) != '\n'))) |
124 | shortage--; | |
125 | SET_PT (pos); | |
126 | return make_number (negp ? - shortage : shortage); | |
127 | } | |
128 | ||
129 | DEFUN ("beginning-of-line", Fbeginning_of_line, Sbeginning_of_line, | |
130 | 0, 1, "p", | |
131 | "Move point to beginning of current line.\n\ | |
72d5f589 | 132 | With argument N not nil or 1, move forward N - 1 lines first.\n\ |
cd645247 JB |
133 | If scan reaches end of buffer, stop there without error.") |
134 | (n) | |
135 | Lisp_Object n; | |
136 | { | |
265a9e55 | 137 | if (NILP (n)) |
48c7cef2 | 138 | XSETFASTINT (n, 1); |
cd645247 JB |
139 | else |
140 | CHECK_NUMBER (n, 0); | |
141 | ||
142 | Fforward_line (make_number (XINT (n) - 1)); | |
143 | return Qnil; | |
144 | } | |
145 | ||
146 | DEFUN ("end-of-line", Fend_of_line, Send_of_line, | |
147 | 0, 1, "p", | |
148 | "Move point to end of current line.\n\ | |
72d5f589 | 149 | With argument N not nil or 1, move forward N - 1 lines first.\n\ |
cd645247 JB |
150 | If scan reaches end of buffer, stop there without error.") |
151 | (n) | |
152 | Lisp_Object n; | |
153 | { | |
154 | register int pos; | |
155 | register int stop; | |
156 | ||
265a9e55 | 157 | if (NILP (n)) |
48c7cef2 | 158 | XSETFASTINT (n, 1); |
cd645247 JB |
159 | else |
160 | CHECK_NUMBER (n, 0); | |
161 | ||
4f5d0c3c | 162 | SET_PT (find_before_next_newline (PT, 0, XINT (n) - (XINT (n) <= 0))); |
cd645247 JB |
163 | |
164 | return Qnil; | |
165 | } | |
166 | ||
167 | DEFUN ("delete-char", Fdelete_char, Sdelete_char, 1, 2, "p\nP", | |
72d5f589 | 168 | "Delete the following N characters (previous if N is negative).\n\ |
cd645247 | 169 | Optional second arg KILLFLAG non-nil means kill instead (save in kill ring).\n\ |
72d5f589 EN |
170 | Interactively, N is the prefix arg, and KILLFLAG is set if\n\ |
171 | N was explicitly specified.") | |
cd645247 JB |
172 | (n, killflag) |
173 | Lisp_Object n, killflag; | |
174 | { | |
175 | CHECK_NUMBER (n, 0); | |
176 | ||
265a9e55 | 177 | if (NILP (killflag)) |
cd645247 JB |
178 | { |
179 | if (XINT (n) < 0) | |
180 | { | |
181 | if (point + XINT (n) < BEGV) | |
182 | Fsignal (Qbeginning_of_buffer, Qnil); | |
183 | else | |
184 | del_range (point + XINT (n), point); | |
185 | } | |
186 | else | |
187 | { | |
188 | if (point + XINT (n) > ZV) | |
189 | Fsignal (Qend_of_buffer, Qnil); | |
190 | else | |
191 | del_range (point, point + XINT (n)); | |
192 | } | |
193 | } | |
194 | else | |
195 | { | |
196 | call1 (Qkill_forward_chars, n); | |
197 | } | |
198 | return Qnil; | |
199 | } | |
200 | ||
201 | DEFUN ("delete-backward-char", Fdelete_backward_char, Sdelete_backward_char, | |
202 | 1, 2, "p\nP", | |
72d5f589 | 203 | "Delete the previous N characters (following if N is negative).\n\ |
cd645247 | 204 | Optional second arg KILLFLAG non-nil means kill instead (save in kill ring).\n\ |
72d5f589 EN |
205 | Interactively, N is the prefix arg, and KILLFLAG is set if\n\ |
206 | N was explicitly specified.") | |
cd645247 JB |
207 | (n, killflag) |
208 | Lisp_Object n, killflag; | |
209 | { | |
aa970069 RS |
210 | Lisp_Object value; |
211 | int deleted_tab = 0; | |
212 | int i; | |
213 | ||
cd645247 | 214 | CHECK_NUMBER (n, 0); |
aa970069 RS |
215 | |
216 | /* See if we are about to delete a tab backwards. */ | |
217 | for (i = 0; i < XINT (n); i++) | |
218 | { | |
219 | if (point - i < BEGV) | |
220 | break; | |
221 | if (FETCH_CHAR (point - i) == '\t') | |
222 | { | |
223 | deleted_tab = 1; | |
224 | break; | |
225 | } | |
226 | } | |
227 | ||
228 | value = Fdelete_char (make_number (-XINT (n)), killflag); | |
229 | ||
230 | /* In overwrite mode, back over columns while clearing them out, | |
231 | unless at end of line. */ | |
232 | if (XINT (n) > 0 | |
233 | && ! NILP (current_buffer->overwrite_mode) | |
234 | && ! deleted_tab | |
235 | && ! (point == ZV || FETCH_CHAR (point) == '\n')) | |
236 | { | |
237 | Finsert_char (make_number (' '), XINT (n)); | |
238 | SET_PT (point - XINT (n)); | |
239 | } | |
240 | ||
241 | return value; | |
cd645247 JB |
242 | } |
243 | ||
244 | DEFUN ("self-insert-command", Fself_insert_command, Sself_insert_command, 1, 1, "p", | |
245 | "Insert the character you type.\n\ | |
246 | Whichever character you type to run this command is inserted.") | |
72d5f589 EN |
247 | (n) |
248 | Lisp_Object n; | |
cd645247 | 249 | { |
72d5f589 | 250 | CHECK_NUMBER (n, 0); |
cd645247 JB |
251 | |
252 | /* Barf if the key that invoked this was not a character. */ | |
ed76f667 | 253 | if (!INTEGERP (last_command_char)) |
cd645247 | 254 | bitch_at_user (); |
72d5f589 | 255 | else if (XINT (n) >= 2 && NILP (current_buffer->overwrite_mode)) |
2718dfa4 | 256 | { |
72d5f589 | 257 | XSETFASTINT (n, XFASTINT (n) - 2); |
2718dfa4 RS |
258 | /* The first one might want to expand an abbrev. */ |
259 | internal_self_insert (XINT (last_command_char), 1); | |
260 | /* The bulk of the copies of this char can be inserted simply. | |
261 | We don't have to handle a user-specified face specially | |
262 | because it will get inherited from the first char inserted. */ | |
72d5f589 | 263 | Finsert_char (last_command_char, n, Qt); |
2718dfa4 RS |
264 | /* The last one might want to auto-fill. */ |
265 | internal_self_insert (XINT (last_command_char), 0); | |
266 | } | |
cd645247 | 267 | else |
72d5f589 | 268 | while (XINT (n) > 0) |
cd645247 | 269 | { |
f58dd69b | 270 | /* Ok since old and new vals both nonneg */ |
72d5f589 EN |
271 | XSETFASTINT (n, XFASTINT (n) - 1); |
272 | internal_self_insert (XINT (last_command_char), XFASTINT (n) != 0); | |
cd645247 JB |
273 | } |
274 | ||
275 | return Qnil; | |
276 | } | |
277 | ||
4c6e656f RS |
278 | /* Insert character C1. If NOAUTOFILL is nonzero, don't do autofill |
279 | even if it is enabled. | |
280 | ||
281 | If this insertion is suitable for direct output (completely simple), | |
aa52fef9 RS |
282 | return 0. A value of 1 indicates this *might* not have been simple. |
283 | A value of 2 means this did things that call for an undo boundary. */ | |
4c6e656f | 284 | |
cd645247 | 285 | internal_self_insert (c1, noautofill) |
af39ac8c RS |
286 | /* This has to be unsigned char; when it is char, |
287 | some compilers sign-extend it in SYNTAX_ENTRY, despite | |
288 | the casts to unsigned char there. */ | |
289 | unsigned char c1; | |
cd645247 JB |
290 | int noautofill; |
291 | { | |
292 | extern Lisp_Object Fexpand_abbrev (); | |
293 | int hairy = 0; | |
294 | Lisp_Object tem; | |
295 | register enum syntaxcode synt; | |
296 | register int c = c1; | |
e7aacab7 | 297 | Lisp_Object overwrite; |
cd645247 | 298 | |
e7aacab7 | 299 | overwrite = current_buffer->overwrite_mode; |
166a4263 RS |
300 | if (!NILP (Vbefore_change_function) || !NILP (Vafter_change_function) |
301 | || !NILP (Vbefore_change_functions) || !NILP (Vafter_change_functions)) | |
cd645247 JB |
302 | hairy = 1; |
303 | ||
6bbb0d4a | 304 | if (!NILP (overwrite) |
cd645247 | 305 | && point < ZV |
6bbb0d4a JB |
306 | && (EQ (overwrite, Qoverwrite_mode_binary) |
307 | || (c != '\n' && FETCH_CHAR (point) != '\n')) | |
308 | && (EQ (overwrite, Qoverwrite_mode_binary) | |
e686c647 | 309 | || FETCH_CHAR (point) != '\t' |
cd645247 | 310 | || XINT (current_buffer->tab_width) <= 0 |
2234dd63 | 311 | || XFASTINT (current_buffer->tab_width) > 20 |
cd645247 JB |
312 | || !((current_column () + 1) % XFASTINT (current_buffer->tab_width)))) |
313 | { | |
314 | del_range (point, point + 1); | |
aa52fef9 | 315 | hairy = 2; |
cd645247 | 316 | } |
265a9e55 | 317 | if (!NILP (current_buffer->abbrev_mode) |
cd645247 | 318 | && SYNTAX (c) != Sword |
265a9e55 | 319 | && NILP (current_buffer->read_only) |
cd645247 JB |
320 | && point > BEGV && SYNTAX (FETCH_CHAR (point - 1)) == Sword) |
321 | { | |
ee8caabb | 322 | int modiff = MODIFF; |
4c6e656f RS |
323 | Fexpand_abbrev (); |
324 | /* We can't trust the value of Fexpand_abbrev, | |
ee8caabb RS |
325 | but if Fexpand_abbrev changed the buffer, |
326 | assume it expanded something. */ | |
327 | if (MODIFF != modiff) | |
aa52fef9 | 328 | hairy = 2; |
cd645247 JB |
329 | } |
330 | if ((c == ' ' || c == '\n') | |
331 | && !noautofill | |
3de15b7a | 332 | && !NILP (current_buffer->auto_fill_function)) |
cd645247 | 333 | { |
76bb6dbb KH |
334 | Lisp_Object tem; |
335 | ||
2e16553c BG |
336 | insert_and_inherit (&c1, 1); |
337 | if (c1 == '\n') | |
338 | /* After inserting a newline, move to previous line and fill */ | |
339 | /* that. Must have the newline in place already so filling and */ | |
340 | /* justification, if any, know where the end is going to be. */ | |
341 | SET_PT (point - 1); | |
76bb6dbb | 342 | tem = call0 (current_buffer->auto_fill_function); |
cd645247 | 343 | if (c1 == '\n') |
2e16553c | 344 | SET_PT (point + 1); |
76bb6dbb KH |
345 | if (!NILP (tem)) |
346 | hairy = 2; | |
cd645247 JB |
347 | } |
348 | else | |
b9a7407f | 349 | insert_and_inherit (&c1, 1); |
189fad68 | 350 | |
38d404db | 351 | #ifdef HAVE_FACES |
189fad68 RS |
352 | /* If previous command specified a face to use, use it. */ |
353 | if (!NILP (Vself_insert_face) | |
346e0c2d | 354 | && EQ (current_kboard->Vlast_command, Vself_insert_face_command)) |
189fad68 RS |
355 | { |
356 | Lisp_Object before, after; | |
357 | XSETINT (before, PT - 1); | |
358 | XSETINT (after, PT); | |
359 | Fput_text_property (before, after, Qface, Vself_insert_face, Qnil); | |
360 | Vself_insert_face = Qnil; | |
361 | } | |
38d404db | 362 | #endif |
cd645247 JB |
363 | synt = SYNTAX (c); |
364 | if ((synt == Sclose || synt == Smath) | |
2718dfa4 RS |
365 | && !NILP (Vblink_paren_function) && INTERACTIVE |
366 | && !noautofill) | |
cd645247 JB |
367 | { |
368 | call0 (Vblink_paren_function); | |
aa52fef9 | 369 | hairy = 2; |
cd645247 JB |
370 | } |
371 | return hairy; | |
372 | } | |
373 | \f | |
374 | /* module initialization */ | |
375 | ||
376 | syms_of_cmds () | |
377 | { | |
378 | Qkill_backward_chars = intern ("kill-backward-chars"); | |
379 | staticpro (&Qkill_backward_chars); | |
380 | ||
381 | Qkill_forward_chars = intern ("kill-forward-chars"); | |
382 | staticpro (&Qkill_forward_chars); | |
383 | ||
6bbb0d4a JB |
384 | Qoverwrite_mode_binary = intern ("overwrite-mode-binary"); |
385 | staticpro (&Qoverwrite_mode_binary); | |
e686c647 | 386 | |
189fad68 RS |
387 | DEFVAR_LISP ("self-insert-face", &Vself_insert_face, |
388 | "If non-nil, set the face of the next self-inserting character to this.\n\ | |
389 | See also `self-insert-face-command'."); | |
390 | Vself_insert_face = Qnil; | |
391 | ||
392 | DEFVAR_LISP ("self-insert-face-command", &Vself_insert_face_command, | |
393 | "This is the command that set up `self-insert-face'.\n\ | |
394 | If `last-command' does not equal this value, we ignore `self-insert-face'."); | |
395 | Vself_insert_face_command = Qnil; | |
396 | ||
cd645247 JB |
397 | DEFVAR_LISP ("blink-paren-function", &Vblink_paren_function, |
398 | "Function called, if non-nil, whenever a close parenthesis is inserted.\n\ | |
399 | More precisely, a char with closeparen syntax is self-inserted."); | |
400 | Vblink_paren_function = Qnil; | |
401 | ||
402 | defsubr (&Sforward_char); | |
403 | defsubr (&Sbackward_char); | |
404 | defsubr (&Sforward_line); | |
405 | defsubr (&Sbeginning_of_line); | |
406 | defsubr (&Send_of_line); | |
407 | ||
408 | defsubr (&Sdelete_char); | |
409 | defsubr (&Sdelete_backward_char); | |
410 | ||
411 | defsubr (&Sself_insert_command); | |
cd645247 JB |
412 | } |
413 | ||
414 | keys_of_cmds () | |
415 | { | |
416 | int n; | |
417 | ||
cbf65115 | 418 | initial_define_key (global_map, Ctl ('I'), "self-insert-command"); |
cd645247 JB |
419 | for (n = 040; n < 0177; n++) |
420 | initial_define_key (global_map, n, "self-insert-command"); | |
cf9cdc11 RS |
421 | #ifdef MSDOS |
422 | for (n = 0200; n < 0240; n++) | |
423 | initial_define_key (global_map, n, "self-insert-command"); | |
424 | #endif | |
94748cb9 | 425 | for (n = 0240; n < 0400; n++) |
eb46da6a | 426 | initial_define_key (global_map, n, "self-insert-command"); |
cd645247 JB |
427 | |
428 | initial_define_key (global_map, Ctl ('A'), "beginning-of-line"); | |
429 | initial_define_key (global_map, Ctl ('B'), "backward-char"); | |
430 | initial_define_key (global_map, Ctl ('D'), "delete-char"); | |
431 | initial_define_key (global_map, Ctl ('E'), "end-of-line"); | |
432 | initial_define_key (global_map, Ctl ('F'), "forward-char"); | |
433 | initial_define_key (global_map, 0177, "delete-backward-char"); | |
434 | } |