(record_property_change): Typo in last change.
[bpt/emacs.git] / src / cmds.c
CommitLineData
cd645247 1/* Simple built-in editing commands.
502ddf23 2 Copyright (C) 1985, 1992 Free Software Foundation, Inc.
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3
4This file is part of GNU Emacs.
5
6GNU Emacs is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
502ddf23 8the Free Software Foundation; either version 2, or (at your option)
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9any later version.
10
11GNU Emacs is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GNU Emacs; see the file COPYING. If not, write to
18the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20
21#include "config.h"
22#include "lisp.h"
23#include "commands.h"
24#include "buffer.h"
25#include "syntax.h"
26
27Lisp_Object Qkill_forward_chars, Qkill_backward_chars, Vblink_paren_function;
28
e686c647 29int overwrite_binary_mode;
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30\f
31DEFUN ("forward-char", Fforward_char, Sforward_char, 0, 1, "p",
32 "Move point right ARG characters (left if ARG negative).\n\
33On reaching end of buffer, stop and signal error.")
34 (n)
35 Lisp_Object n;
36{
265a9e55 37 if (NILP (n))
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38 XFASTINT (n) = 1;
39 else
40 CHECK_NUMBER (n, 0);
41
42 SET_PT (point + XINT (n));
43 if (point < BEGV)
44 {
45 SET_PT (BEGV);
46 Fsignal (Qbeginning_of_buffer, Qnil);
47 }
48 if (point > ZV)
49 {
50 SET_PT (ZV);
51 Fsignal (Qend_of_buffer, Qnil);
52 }
53 return Qnil;
54}
55
56DEFUN ("backward-char", Fbackward_char, Sbackward_char, 0, 1, "p",
57 "Move point left ARG characters (right if ARG negative).\n\
58On attempt to pass beginning or end of buffer, stop and signal error.")
59 (n)
60 Lisp_Object n;
61{
265a9e55 62 if (NILP (n))
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63 XFASTINT (n) = 1;
64 else
65 CHECK_NUMBER (n, 0);
66
67 XSETINT (n, - XINT (n));
68 return Fforward_char (n);
69}
70
71DEFUN ("forward-line", Fforward_line, Sforward_line, 0, 1, "p",
72 "Move ARG lines forward (backward if ARG is negative).\n\
73Precisely, if point is on line I, move to the start of line I + ARG.\n\
74If there isn't room, go as far as possible (no error).\n\
75Returns the count of lines left to move. If moving forward,\n\
76that is ARG - number of lines moved; if backward, ARG + number moved.\n\
77With positive ARG, a non-empty line at the end counts as one line\n\
78 successfully moved (for the return value).")
79 (n)
80 Lisp_Object n;
81{
82 int pos2 = point;
83 int pos;
84 int count, shortage, negp;
85
265a9e55 86 if (NILP (n))
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87 count = 1;
88 else
89 {
90 CHECK_NUMBER (n, 0);
91 count = XINT (n);
92 }
93
94 negp = count <= 0;
95 pos = scan_buffer ('\n', pos2, count - negp, &shortage);
96 if (shortage > 0
97 && (negp
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98 || (ZV > BEGV
99 && pos != pos2
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100 && FETCH_CHAR (pos - 1) != '\n')))
101 shortage--;
102 SET_PT (pos);
103 return make_number (negp ? - shortage : shortage);
104}
105
106DEFUN ("beginning-of-line", Fbeginning_of_line, Sbeginning_of_line,
107 0, 1, "p",
108 "Move point to beginning of current line.\n\
109With argument ARG not nil or 1, move forward ARG - 1 lines first.\n\
110If scan reaches end of buffer, stop there without error.")
111 (n)
112 Lisp_Object n;
113{
265a9e55 114 if (NILP (n))
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115 XFASTINT (n) = 1;
116 else
117 CHECK_NUMBER (n, 0);
118
119 Fforward_line (make_number (XINT (n) - 1));
120 return Qnil;
121}
122
123DEFUN ("end-of-line", Fend_of_line, Send_of_line,
124 0, 1, "p",
125 "Move point to end of current line.\n\
126With argument ARG not nil or 1, move forward ARG - 1 lines first.\n\
127If scan reaches end of buffer, stop there without error.")
128 (n)
129 Lisp_Object n;
130{
131 register int pos;
132 register int stop;
133
265a9e55 134 if (NILP (n))
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135 XFASTINT (n) = 1;
136 else
137 CHECK_NUMBER (n, 0);
138
139 if (XINT (n) != 1)
140 Fforward_line (make_number (XINT (n) - 1));
141
142 pos = point;
143 stop = ZV;
144 while (pos < stop && FETCH_CHAR (pos) != '\n') pos++;
145 SET_PT (pos);
146
147 return Qnil;
148}
149
150DEFUN ("delete-char", Fdelete_char, Sdelete_char, 1, 2, "p\nP",
151 "Delete the following ARG characters (previous, with negative arg).\n\
152Optional second arg KILLFLAG non-nil means kill instead (save in kill ring).\n\
153Interactively, ARG is the prefix arg, and KILLFLAG is set if\n\
154ARG was explicitly specified.")
155 (n, killflag)
156 Lisp_Object n, killflag;
157{
158 CHECK_NUMBER (n, 0);
159
265a9e55 160 if (NILP (killflag))
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161 {
162 if (XINT (n) < 0)
163 {
164 if (point + XINT (n) < BEGV)
165 Fsignal (Qbeginning_of_buffer, Qnil);
166 else
167 del_range (point + XINT (n), point);
168 }
169 else
170 {
171 if (point + XINT (n) > ZV)
172 Fsignal (Qend_of_buffer, Qnil);
173 else
174 del_range (point, point + XINT (n));
175 }
176 }
177 else
178 {
179 call1 (Qkill_forward_chars, n);
180 }
181 return Qnil;
182}
183
184DEFUN ("delete-backward-char", Fdelete_backward_char, Sdelete_backward_char,
185 1, 2, "p\nP",
186 "Delete the previous ARG characters (following, with negative ARG).\n\
187Optional second arg KILLFLAG non-nil means kill instead (save in kill ring).\n\
188Interactively, ARG is the prefix arg, and KILLFLAG is set if\n\
189ARG was explicitly specified.")
190 (n, killflag)
191 Lisp_Object n, killflag;
192{
193 CHECK_NUMBER (n, 0);
194 return Fdelete_char (make_number (-XINT (n)), killflag);
195}
196
197DEFUN ("self-insert-command", Fself_insert_command, Sself_insert_command, 1, 1, "p",
198 "Insert the character you type.\n\
199Whichever character you type to run this command is inserted.")
200 (arg)
201 Lisp_Object arg;
202{
203 CHECK_NUMBER (arg, 0);
204
205 /* Barf if the key that invoked this was not a character. */
206 if (XTYPE (last_command_char) != Lisp_Int)
207 bitch_at_user ();
208 else
209 while (XINT (arg) > 0)
210 {
211 XFASTINT (arg)--; /* Ok since old and new vals both nonneg */
212 internal_self_insert (XINT (last_command_char), XFASTINT (arg) != 0);
213 }
214
215 return Qnil;
216}
217
218DEFUN ("newline", Fnewline, Snewline, 0, 1, "P",
219 "Insert a newline. With arg, insert that many newlines.\n\
220In Auto Fill mode, if no numeric arg, break the preceding line if it's long.")
221 (arg1)
222 Lisp_Object arg1;
223{
224 int flag;
225 Lisp_Object arg;
226 char c1 = '\n';
227
228 arg = Fprefix_numeric_value (arg1);
229
265a9e55 230 if (!NILP (current_buffer->read_only))
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231 Fsignal (Qbuffer_read_only, Qnil);
232
233 /* Inserting a newline at the end of a line
234 produces better redisplay in try_window_id
235 than inserting at the ebginning fo a line,
236 And the textual result is the same.
237 So if at beginning, pretend to be at the end.
238 Must avoid internal_self_insert in that case since point is wrong.
239 Luckily internal_self_insert's special features all do nothing in that case. */
240
241 flag = point > BEGV && FETCH_CHAR (point - 1) == '\n';
242 if (flag)
243 SET_PT (point - 1);
244
245 while (XINT (arg) > 0)
246 {
247 if (flag)
248 insert (&c1, 1);
249 else
265a9e55 250 internal_self_insert ('\n', !NILP (arg1));
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251 XFASTINT (arg)--; /* Ok since old and new vals both nonneg */
252 }
253
254 if (flag)
255 SET_PT (point + 1);
256
257 return Qnil;
258}
259
4c6e656f
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260/* Insert character C1. If NOAUTOFILL is nonzero, don't do autofill
261 even if it is enabled.
262
263 If this insertion is suitable for direct output (completely simple),
264 return 0. A value of 1 indicates this *might* not have been simple. */
265
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266internal_self_insert (c1, noautofill)
267 char c1;
268 int noautofill;
269{
270 extern Lisp_Object Fexpand_abbrev ();
271 int hairy = 0;
272 Lisp_Object tem;
273 register enum syntaxcode synt;
274 register int c = c1;
275
265a9e55 276 if (!NILP (Vbefore_change_function) || !NILP (Vafter_change_function))
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277 hairy = 1;
278
265a9e55 279 if (!NILP (current_buffer->overwrite_mode)
cd645247 280 && point < ZV
e686c647
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281 && (overwrite_binary_mode || (c != '\n' && FETCH_CHAR (point) != '\n'))
282 && (overwrite_binary_mode
283 || FETCH_CHAR (point) != '\t'
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284 || XINT (current_buffer->tab_width) <= 0
285 || !((current_column () + 1) % XFASTINT (current_buffer->tab_width))))
286 {
287 del_range (point, point + 1);
288 hairy = 1;
289 }
265a9e55 290 if (!NILP (current_buffer->abbrev_mode)
cd645247 291 && SYNTAX (c) != Sword
265a9e55 292 && NILP (current_buffer->read_only)
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293 && point > BEGV && SYNTAX (FETCH_CHAR (point - 1)) == Sword)
294 {
ee8caabb 295 int modiff = MODIFF;
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296 Fexpand_abbrev ();
297 /* We can't trust the value of Fexpand_abbrev,
ee8caabb
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298 but if Fexpand_abbrev changed the buffer,
299 assume it expanded something. */
300 if (MODIFF != modiff)
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301 hairy = 1;
302 }
303 if ((c == ' ' || c == '\n')
304 && !noautofill
265a9e55 305 && !NILP (current_buffer->auto_fill_function)
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306 && current_column () > XFASTINT (current_buffer->fill_column))
307 {
308 if (c1 != '\n')
309 insert (&c1, 1);
310 call0 (current_buffer->auto_fill_function);
311 if (c1 == '\n')
312 insert (&c1, 1);
313 hairy = 1;
314 }
315 else
316 insert (&c1, 1);
317 synt = SYNTAX (c);
318 if ((synt == Sclose || synt == Smath)
265a9e55 319 && !NILP (Vblink_paren_function) && INTERACTIVE)
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320 {
321 call0 (Vblink_paren_function);
322 hairy = 1;
323 }
324 return hairy;
325}
326\f
327/* module initialization */
328
329syms_of_cmds ()
330{
331 Qkill_backward_chars = intern ("kill-backward-chars");
332 staticpro (&Qkill_backward_chars);
333
334 Qkill_forward_chars = intern ("kill-forward-chars");
335 staticpro (&Qkill_forward_chars);
336
e686c647
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337 DEFVAR_BOOL ("overwrite-binary-mode", &overwrite_binary_mode,
338 "*Non-nil means overwrite mode treats tab and newline normally.\n\
339Ordinarily, overwriting preserves a tab until its whole width is overwritten\n\
340and never replaces a newline.");
341 overwrite_tabs_mode = 1;
342
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343 DEFVAR_LISP ("blink-paren-function", &Vblink_paren_function,
344 "Function called, if non-nil, whenever a close parenthesis is inserted.\n\
345More precisely, a char with closeparen syntax is self-inserted.");
346 Vblink_paren_function = Qnil;
347
348 defsubr (&Sforward_char);
349 defsubr (&Sbackward_char);
350 defsubr (&Sforward_line);
351 defsubr (&Sbeginning_of_line);
352 defsubr (&Send_of_line);
353
354 defsubr (&Sdelete_char);
355 defsubr (&Sdelete_backward_char);
356
357 defsubr (&Sself_insert_command);
358 defsubr (&Snewline);
359}
360
361keys_of_cmds ()
362{
363 int n;
364
365 initial_define_key (global_map, Ctl('M'), "newline");
366 initial_define_key (global_map, Ctl('I'), "self-insert-command");
367 for (n = 040; n < 0177; n++)
368 initial_define_key (global_map, n, "self-insert-command");
369
370 initial_define_key (global_map, Ctl ('A'), "beginning-of-line");
371 initial_define_key (global_map, Ctl ('B'), "backward-char");
372 initial_define_key (global_map, Ctl ('D'), "delete-char");
373 initial_define_key (global_map, Ctl ('E'), "end-of-line");
374 initial_define_key (global_map, Ctl ('F'), "forward-char");
375 initial_define_key (global_map, 0177, "delete-backward-char");
376}