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cd645247 | 1 | /* Simple built-in editing commands. |
f8c25f1b | 2 | Copyright (C) 1985, 1993, 1994, 1995 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 | ||
189fad68 RS |
33 | /* Non-nil means put this face on the next self-inserting character. */ |
34 | Lisp_Object Vself_insert_face; | |
35 | ||
36 | /* This is the command that set up Vself_insert_face. */ | |
37 | Lisp_Object Vself_insert_face_command; | |
38 | ||
189fad68 | 39 | extern Lisp_Object Qface; |
cd645247 JB |
40 | \f |
41 | DEFUN ("forward-char", Fforward_char, Sforward_char, 0, 1, "p", | |
42 | "Move point right ARG characters (left if ARG negative).\n\ | |
43 | On reaching end of buffer, stop and signal error.") | |
44 | (n) | |
45 | Lisp_Object n; | |
46 | { | |
265a9e55 | 47 | if (NILP (n)) |
48c7cef2 | 48 | XSETFASTINT (n, 1); |
cd645247 JB |
49 | else |
50 | CHECK_NUMBER (n, 0); | |
51 | ||
7b502dc3 JB |
52 | /* This used to just set point to point + XINT (n), and then check |
53 | to see if it was within boundaries. But now that SET_PT can | |
54 | potentially do a lot of stuff (calling entering and exiting | |
55 | hooks, etcetera), that's not a good approach. So we validate the | |
56 | proposed position, then set point. */ | |
57 | { | |
58 | int new_point = point + XINT (n); | |
59 | ||
60 | if (new_point < BEGV) | |
61 | { | |
62 | SET_PT (BEGV); | |
63 | Fsignal (Qbeginning_of_buffer, Qnil); | |
64 | } | |
65 | if (new_point > ZV) | |
66 | { | |
67 | SET_PT (ZV); | |
68 | Fsignal (Qend_of_buffer, Qnil); | |
69 | } | |
70 | ||
71 | SET_PT (new_point); | |
72 | } | |
73 | ||
cd645247 JB |
74 | return Qnil; |
75 | } | |
76 | ||
77 | DEFUN ("backward-char", Fbackward_char, Sbackward_char, 0, 1, "p", | |
78 | "Move point left ARG characters (right if ARG negative).\n\ | |
79 | On attempt to pass beginning or end of buffer, stop and signal error.") | |
80 | (n) | |
81 | Lisp_Object n; | |
82 | { | |
265a9e55 | 83 | if (NILP (n)) |
48c7cef2 | 84 | XSETFASTINT (n, 1); |
cd645247 JB |
85 | else |
86 | CHECK_NUMBER (n, 0); | |
87 | ||
88 | XSETINT (n, - XINT (n)); | |
89 | return Fforward_char (n); | |
90 | } | |
91 | ||
92 | DEFUN ("forward-line", Fforward_line, Sforward_line, 0, 1, "p", | |
93 | "Move ARG lines forward (backward if ARG is negative).\n\ | |
94 | Precisely, if point is on line I, move to the start of line I + ARG.\n\ | |
95 | If there isn't room, go as far as possible (no error).\n\ | |
96 | Returns the count of lines left to move. If moving forward,\n\ | |
97 | that is ARG - number of lines moved; if backward, ARG + number moved.\n\ | |
98 | With positive ARG, a non-empty line at the end counts as one line\n\ | |
99 | successfully moved (for the return value).") | |
100 | (n) | |
101 | Lisp_Object n; | |
102 | { | |
103 | int pos2 = point; | |
104 | int pos; | |
105 | int count, shortage, negp; | |
106 | ||
265a9e55 | 107 | if (NILP (n)) |
cd645247 JB |
108 | count = 1; |
109 | else | |
110 | { | |
111 | CHECK_NUMBER (n, 0); | |
112 | count = XINT (n); | |
113 | } | |
114 | ||
115 | negp = count <= 0; | |
4f5d0c3c | 116 | pos = scan_buffer ('\n', pos2, 0, count - negp, &shortage, 1); |
cd645247 JB |
117 | if (shortage > 0 |
118 | && (negp | |
502ddf23 JB |
119 | || (ZV > BEGV |
120 | && pos != pos2 | |
cd645247 JB |
121 | && FETCH_CHAR (pos - 1) != '\n'))) |
122 | shortage--; | |
123 | SET_PT (pos); | |
124 | return make_number (negp ? - shortage : shortage); | |
125 | } | |
126 | ||
127 | DEFUN ("beginning-of-line", Fbeginning_of_line, Sbeginning_of_line, | |
128 | 0, 1, "p", | |
129 | "Move point to beginning of current line.\n\ | |
130 | With argument ARG not nil or 1, move forward ARG - 1 lines first.\n\ | |
131 | If scan reaches end of buffer, stop there without error.") | |
132 | (n) | |
133 | Lisp_Object n; | |
134 | { | |
265a9e55 | 135 | if (NILP (n)) |
48c7cef2 | 136 | XSETFASTINT (n, 1); |
cd645247 JB |
137 | else |
138 | CHECK_NUMBER (n, 0); | |
139 | ||
140 | Fforward_line (make_number (XINT (n) - 1)); | |
141 | return Qnil; | |
142 | } | |
143 | ||
144 | DEFUN ("end-of-line", Fend_of_line, Send_of_line, | |
145 | 0, 1, "p", | |
146 | "Move point to end of current line.\n\ | |
147 | With argument ARG not nil or 1, move forward ARG - 1 lines first.\n\ | |
148 | If scan reaches end of buffer, stop there without error.") | |
149 | (n) | |
150 | Lisp_Object n; | |
151 | { | |
152 | register int pos; | |
153 | register int stop; | |
154 | ||
265a9e55 | 155 | if (NILP (n)) |
48c7cef2 | 156 | XSETFASTINT (n, 1); |
cd645247 JB |
157 | else |
158 | CHECK_NUMBER (n, 0); | |
159 | ||
4f5d0c3c | 160 | SET_PT (find_before_next_newline (PT, 0, XINT (n) - (XINT (n) <= 0))); |
cd645247 JB |
161 | |
162 | return Qnil; | |
163 | } | |
164 | ||
165 | DEFUN ("delete-char", Fdelete_char, Sdelete_char, 1, 2, "p\nP", | |
166 | "Delete the following ARG characters (previous, with negative arg).\n\ | |
167 | Optional second arg KILLFLAG non-nil means kill instead (save in kill ring).\n\ | |
168 | Interactively, ARG is the prefix arg, and KILLFLAG is set if\n\ | |
169 | ARG was explicitly specified.") | |
170 | (n, killflag) | |
171 | Lisp_Object n, killflag; | |
172 | { | |
173 | CHECK_NUMBER (n, 0); | |
174 | ||
265a9e55 | 175 | if (NILP (killflag)) |
cd645247 JB |
176 | { |
177 | if (XINT (n) < 0) | |
178 | { | |
179 | if (point + XINT (n) < BEGV) | |
180 | Fsignal (Qbeginning_of_buffer, Qnil); | |
181 | else | |
182 | del_range (point + XINT (n), point); | |
183 | } | |
184 | else | |
185 | { | |
186 | if (point + XINT (n) > ZV) | |
187 | Fsignal (Qend_of_buffer, Qnil); | |
188 | else | |
189 | del_range (point, point + XINT (n)); | |
190 | } | |
191 | } | |
192 | else | |
193 | { | |
194 | call1 (Qkill_forward_chars, n); | |
195 | } | |
196 | return Qnil; | |
197 | } | |
198 | ||
199 | DEFUN ("delete-backward-char", Fdelete_backward_char, Sdelete_backward_char, | |
200 | 1, 2, "p\nP", | |
201 | "Delete the previous ARG characters (following, with negative ARG).\n\ | |
202 | Optional second arg KILLFLAG non-nil means kill instead (save in kill ring).\n\ | |
203 | Interactively, ARG is the prefix arg, and KILLFLAG is set if\n\ | |
204 | ARG was explicitly specified.") | |
205 | (n, killflag) | |
206 | Lisp_Object n, killflag; | |
207 | { | |
208 | CHECK_NUMBER (n, 0); | |
209 | return Fdelete_char (make_number (-XINT (n)), killflag); | |
210 | } | |
211 | ||
212 | DEFUN ("self-insert-command", Fself_insert_command, Sself_insert_command, 1, 1, "p", | |
213 | "Insert the character you type.\n\ | |
214 | Whichever character you type to run this command is inserted.") | |
215 | (arg) | |
216 | Lisp_Object arg; | |
217 | { | |
218 | CHECK_NUMBER (arg, 0); | |
219 | ||
220 | /* Barf if the key that invoked this was not a character. */ | |
ed76f667 | 221 | if (!INTEGERP (last_command_char)) |
cd645247 JB |
222 | bitch_at_user (); |
223 | else | |
224 | while (XINT (arg) > 0) | |
225 | { | |
f58dd69b KH |
226 | /* Ok since old and new vals both nonneg */ |
227 | XSETFASTINT (arg, XFASTINT (arg) - 1); | |
cd645247 JB |
228 | internal_self_insert (XINT (last_command_char), XFASTINT (arg) != 0); |
229 | } | |
230 | ||
231 | return Qnil; | |
232 | } | |
233 | ||
4c6e656f RS |
234 | /* Insert character C1. If NOAUTOFILL is nonzero, don't do autofill |
235 | even if it is enabled. | |
236 | ||
237 | If this insertion is suitable for direct output (completely simple), | |
aa52fef9 RS |
238 | return 0. A value of 1 indicates this *might* not have been simple. |
239 | A value of 2 means this did things that call for an undo boundary. */ | |
4c6e656f | 240 | |
cd645247 JB |
241 | internal_self_insert (c1, noautofill) |
242 | char c1; | |
243 | int noautofill; | |
244 | { | |
245 | extern Lisp_Object Fexpand_abbrev (); | |
246 | int hairy = 0; | |
247 | Lisp_Object tem; | |
248 | register enum syntaxcode synt; | |
249 | register int c = c1; | |
e7aacab7 | 250 | Lisp_Object overwrite; |
cd645247 | 251 | |
e7aacab7 | 252 | overwrite = current_buffer->overwrite_mode; |
166a4263 RS |
253 | if (!NILP (Vbefore_change_function) || !NILP (Vafter_change_function) |
254 | || !NILP (Vbefore_change_functions) || !NILP (Vafter_change_functions)) | |
cd645247 JB |
255 | hairy = 1; |
256 | ||
6bbb0d4a | 257 | if (!NILP (overwrite) |
cd645247 | 258 | && point < ZV |
6bbb0d4a JB |
259 | && (EQ (overwrite, Qoverwrite_mode_binary) |
260 | || (c != '\n' && FETCH_CHAR (point) != '\n')) | |
261 | && (EQ (overwrite, Qoverwrite_mode_binary) | |
e686c647 | 262 | || FETCH_CHAR (point) != '\t' |
cd645247 | 263 | || XINT (current_buffer->tab_width) <= 0 |
2234dd63 | 264 | || XFASTINT (current_buffer->tab_width) > 20 |
cd645247 JB |
265 | || !((current_column () + 1) % XFASTINT (current_buffer->tab_width)))) |
266 | { | |
267 | del_range (point, point + 1); | |
aa52fef9 | 268 | hairy = 2; |
cd645247 | 269 | } |
265a9e55 | 270 | if (!NILP (current_buffer->abbrev_mode) |
cd645247 | 271 | && SYNTAX (c) != Sword |
265a9e55 | 272 | && NILP (current_buffer->read_only) |
cd645247 JB |
273 | && point > BEGV && SYNTAX (FETCH_CHAR (point - 1)) == Sword) |
274 | { | |
ee8caabb | 275 | int modiff = MODIFF; |
4c6e656f RS |
276 | Fexpand_abbrev (); |
277 | /* We can't trust the value of Fexpand_abbrev, | |
ee8caabb RS |
278 | but if Fexpand_abbrev changed the buffer, |
279 | assume it expanded something. */ | |
280 | if (MODIFF != modiff) | |
aa52fef9 | 281 | hairy = 2; |
cd645247 JB |
282 | } |
283 | if ((c == ' ' || c == '\n') | |
284 | && !noautofill | |
3de15b7a | 285 | && !NILP (current_buffer->auto_fill_function)) |
cd645247 | 286 | { |
2e16553c BG |
287 | insert_and_inherit (&c1, 1); |
288 | if (c1 == '\n') | |
289 | /* After inserting a newline, move to previous line and fill */ | |
290 | /* that. Must have the newline in place already so filling and */ | |
291 | /* justification, if any, know where the end is going to be. */ | |
292 | SET_PT (point - 1); | |
cd645247 JB |
293 | call0 (current_buffer->auto_fill_function); |
294 | if (c1 == '\n') | |
2e16553c | 295 | SET_PT (point + 1); |
aa52fef9 | 296 | hairy = 2; |
cd645247 JB |
297 | } |
298 | else | |
b9a7407f | 299 | insert_and_inherit (&c1, 1); |
189fad68 | 300 | |
38d404db | 301 | #ifdef HAVE_FACES |
189fad68 RS |
302 | /* If previous command specified a face to use, use it. */ |
303 | if (!NILP (Vself_insert_face) | |
304 | && EQ (last_command, Vself_insert_face_command)) | |
305 | { | |
306 | Lisp_Object before, after; | |
307 | XSETINT (before, PT - 1); | |
308 | XSETINT (after, PT); | |
309 | Fput_text_property (before, after, Qface, Vself_insert_face, Qnil); | |
310 | Vself_insert_face = Qnil; | |
311 | } | |
38d404db | 312 | #endif |
cd645247 JB |
313 | synt = SYNTAX (c); |
314 | if ((synt == Sclose || synt == Smath) | |
265a9e55 | 315 | && !NILP (Vblink_paren_function) && INTERACTIVE) |
cd645247 JB |
316 | { |
317 | call0 (Vblink_paren_function); | |
aa52fef9 | 318 | hairy = 2; |
cd645247 JB |
319 | } |
320 | return hairy; | |
321 | } | |
322 | \f | |
323 | /* module initialization */ | |
324 | ||
325 | syms_of_cmds () | |
326 | { | |
327 | Qkill_backward_chars = intern ("kill-backward-chars"); | |
328 | staticpro (&Qkill_backward_chars); | |
329 | ||
330 | Qkill_forward_chars = intern ("kill-forward-chars"); | |
331 | staticpro (&Qkill_forward_chars); | |
332 | ||
6bbb0d4a JB |
333 | Qoverwrite_mode_binary = intern ("overwrite-mode-binary"); |
334 | staticpro (&Qoverwrite_mode_binary); | |
e686c647 | 335 | |
189fad68 RS |
336 | DEFVAR_LISP ("self-insert-face", &Vself_insert_face, |
337 | "If non-nil, set the face of the next self-inserting character to this.\n\ | |
338 | See also `self-insert-face-command'."); | |
339 | Vself_insert_face = Qnil; | |
340 | ||
341 | DEFVAR_LISP ("self-insert-face-command", &Vself_insert_face_command, | |
342 | "This is the command that set up `self-insert-face'.\n\ | |
343 | If `last-command' does not equal this value, we ignore `self-insert-face'."); | |
344 | Vself_insert_face_command = Qnil; | |
345 | ||
cd645247 JB |
346 | DEFVAR_LISP ("blink-paren-function", &Vblink_paren_function, |
347 | "Function called, if non-nil, whenever a close parenthesis is inserted.\n\ | |
348 | More precisely, a char with closeparen syntax is self-inserted."); | |
349 | Vblink_paren_function = Qnil; | |
350 | ||
351 | defsubr (&Sforward_char); | |
352 | defsubr (&Sbackward_char); | |
353 | defsubr (&Sforward_line); | |
354 | defsubr (&Sbeginning_of_line); | |
355 | defsubr (&Send_of_line); | |
356 | ||
357 | defsubr (&Sdelete_char); | |
358 | defsubr (&Sdelete_backward_char); | |
359 | ||
360 | defsubr (&Sself_insert_command); | |
cd645247 JB |
361 | } |
362 | ||
363 | keys_of_cmds () | |
364 | { | |
365 | int n; | |
366 | ||
cbf65115 | 367 | initial_define_key (global_map, Ctl ('I'), "self-insert-command"); |
cd645247 JB |
368 | for (n = 040; n < 0177; n++) |
369 | initial_define_key (global_map, n, "self-insert-command"); | |
cf9cdc11 RS |
370 | #ifdef MSDOS |
371 | for (n = 0200; n < 0240; n++) | |
372 | initial_define_key (global_map, n, "self-insert-command"); | |
373 | #endif | |
94748cb9 | 374 | for (n = 0240; n < 0400; n++) |
eb46da6a | 375 | initial_define_key (global_map, n, "self-insert-command"); |
cd645247 JB |
376 | |
377 | initial_define_key (global_map, Ctl ('A'), "beginning-of-line"); | |
378 | initial_define_key (global_map, Ctl ('B'), "backward-char"); | |
379 | initial_define_key (global_map, Ctl ('D'), "delete-char"); | |
380 | initial_define_key (global_map, Ctl ('E'), "end-of-line"); | |
381 | initial_define_key (global_map, Ctl ('F'), "forward-char"); | |
382 | initial_define_key (global_map, 0177, "delete-backward-char"); | |
383 | } |