1 /* Simple built-in editing commands.
2 Copyright (C) 1985, 1993, 1994, 1995 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
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
8 the Free Software Foundation; either version 2, or (at your option)
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.
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. */
28 Lisp_Object Qkill_forward_chars
, Qkill_backward_chars
, Vblink_paren_function
;
30 /* A possible value for a buffer's overwrite-mode variable. */
31 Lisp_Object Qoverwrite_mode_binary
;
33 /* Non-nil means put this face on the next self-inserting character. */
34 Lisp_Object Vself_insert_face
;
36 /* This is the command that set up Vself_insert_face. */
37 Lisp_Object Vself_insert_face_command
;
39 extern Lisp_Object Qface
;
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.")
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. */
58 int new_point
= point
+ XINT (n
);
63 Fsignal (Qbeginning_of_buffer
, Qnil
);
68 Fsignal (Qend_of_buffer
, Qnil
);
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.")
88 XSETINT (n
, - XINT (n
));
89 return Fforward_char (n
);
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).")
105 int count
, shortage
, negp
;
116 pos
= scan_buffer ('\n', pos2
, 0, count
- negp
, &shortage
, 1);
121 && FETCH_CHAR (pos
- 1) != '\n')))
124 return make_number (negp
? - shortage
: shortage
);
127 DEFUN ("beginning-of-line", Fbeginning_of_line
, Sbeginning_of_line
,
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.")
140 Fforward_line (make_number (XINT (n
) - 1));
144 DEFUN ("end-of-line", Fend_of_line
, Send_of_line
,
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.")
160 SET_PT (find_before_next_newline (PT
, 0, XINT (n
) - (XINT (n
) <= 0)));
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.")
171 Lisp_Object n
, killflag
;
179 if (point
+ XINT (n
) < BEGV
)
180 Fsignal (Qbeginning_of_buffer
, Qnil
);
182 del_range (point
+ XINT (n
), point
);
186 if (point
+ XINT (n
) > ZV
)
187 Fsignal (Qend_of_buffer
, Qnil
);
189 del_range (point
, point
+ XINT (n
));
194 call1 (Qkill_forward_chars
, n
);
199 DEFUN ("delete-backward-char", Fdelete_backward_char
, Sdelete_backward_char
,
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.")
206 Lisp_Object n
, killflag
;
209 return Fdelete_char (make_number (-XINT (n
)), killflag
);
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.")
218 CHECK_NUMBER (arg
, 0);
220 /* Barf if the key that invoked this was not a character. */
221 if (!INTEGERP (last_command_char
))
224 while (XINT (arg
) > 0)
226 /* Ok since old and new vals both nonneg */
227 XSETFASTINT (arg
, XFASTINT (arg
) - 1);
228 internal_self_insert (XINT (last_command_char
), XFASTINT (arg
) != 0);
234 /* Insert character C1. If NOAUTOFILL is nonzero, don't do autofill
235 even if it is enabled.
237 If this insertion is suitable for direct output (completely simple),
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. */
241 internal_self_insert (c1
, noautofill
)
245 extern Lisp_Object
Fexpand_abbrev ();
248 register enum syntaxcode synt
;
250 Lisp_Object overwrite
;
252 overwrite
= current_buffer
->overwrite_mode
;
253 if (!NILP (Vbefore_change_function
) || !NILP (Vafter_change_function
)
254 || !NILP (Vbefore_change_functions
) || !NILP (Vafter_change_functions
))
257 if (!NILP (overwrite
)
259 && (EQ (overwrite
, Qoverwrite_mode_binary
)
260 || (c
!= '\n' && FETCH_CHAR (point
) != '\n'))
261 && (EQ (overwrite
, Qoverwrite_mode_binary
)
262 || FETCH_CHAR (point
) != '\t'
263 || XINT (current_buffer
->tab_width
) <= 0
264 || XFASTINT (current_buffer
->tab_width
) > 20
265 || !((current_column () + 1) % XFASTINT (current_buffer
->tab_width
))))
267 del_range (point
, point
+ 1);
270 if (!NILP (current_buffer
->abbrev_mode
)
271 && SYNTAX (c
) != Sword
272 && NILP (current_buffer
->read_only
)
273 && point
> BEGV
&& SYNTAX (FETCH_CHAR (point
- 1)) == Sword
)
277 /* We can't trust the value of Fexpand_abbrev,
278 but if Fexpand_abbrev changed the buffer,
279 assume it expanded something. */
280 if (MODIFF
!= modiff
)
283 if ((c
== ' ' || c
== '\n')
285 && !NILP (current_buffer
->auto_fill_function
))
287 insert_and_inherit (&c1
, 1);
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. */
293 call0 (current_buffer
->auto_fill_function
);
299 insert_and_inherit (&c1
, 1);
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
))
306 Lisp_Object before
, after
;
307 XSETINT (before
, PT
- 1);
309 Fput_text_property (before
, after
, Qface
, Vself_insert_face
, Qnil
);
310 Vself_insert_face
= Qnil
;
314 if ((synt
== Sclose
|| synt
== Smath
)
315 && !NILP (Vblink_paren_function
) && INTERACTIVE
)
317 call0 (Vblink_paren_function
);
323 /* module initialization */
327 Qkill_backward_chars
= intern ("kill-backward-chars");
328 staticpro (&Qkill_backward_chars
);
330 Qkill_forward_chars
= intern ("kill-forward-chars");
331 staticpro (&Qkill_forward_chars
);
333 Qoverwrite_mode_binary
= intern ("overwrite-mode-binary");
334 staticpro (&Qoverwrite_mode_binary
);
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
;
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
;
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
;
351 defsubr (&Sforward_char
);
352 defsubr (&Sbackward_char
);
353 defsubr (&Sforward_line
);
354 defsubr (&Sbeginning_of_line
);
355 defsubr (&Send_of_line
);
357 defsubr (&Sdelete_char
);
358 defsubr (&Sdelete_backward_char
);
360 defsubr (&Sself_insert_command
);
367 initial_define_key (global_map
, Ctl ('I'), "self-insert-command");
368 for (n
= 040; n
< 0177; n
++)
369 initial_define_key (global_map
, n
, "self-insert-command");
371 for (n
= 0200; n
< 0240; n
++)
372 initial_define_key (global_map
, n
, "self-insert-command");
374 for (n
= 0240; n
< 0400; n
++)
375 initial_define_key (global_map
, n
, "self-insert-command");
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");