callint.c 27.8 KB
Newer Older
Michael I. Bushnell's avatar
Michael I. Bushnell committed
1
/* Call a Lisp function interactively.
2
   Copyright (C) 1985, 86, 93, 94, 95, 1997 Free Software Foundation, Inc.
Michael I. Bushnell's avatar
Michael I. Bushnell committed
3 4 5 6 7

This file is part of GNU Emacs.

GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
Jim Blandy's avatar
Jim Blandy committed
8
the Free Software Foundation; either version 2, or (at your option)
Michael I. Bushnell's avatar
Michael I. Bushnell committed
9 10 11 12 13 14 15 16 17
any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
18 19
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */
Michael I. Bushnell's avatar
Michael I. Bushnell committed
20 21


22
#include <config.h>
Michael I. Bushnell's avatar
Michael I. Bushnell committed
23 24 25
#include "lisp.h"
#include "buffer.h"
#include "commands.h"
Jim Blandy's avatar
Jim Blandy committed
26
#include "keyboard.h"
Michael I. Bushnell's avatar
Michael I. Bushnell committed
27 28 29 30 31
#include "window.h"
#include "mocklisp.h"

extern char *index ();

32 33
extern Lisp_Object Qcursor_in_echo_area;

34
Lisp_Object Vcurrent_prefix_arg, Qminus, Qplus;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
35 36 37
Lisp_Object Qcall_interactively;
Lisp_Object Vcommand_history;

38 39
extern Lisp_Object Vhistory_length;

Michael I. Bushnell's avatar
Michael I. Bushnell committed
40
Lisp_Object Vcommand_debug_status, Qcommand_debug_status;
Richard M. Stallman's avatar
Richard M. Stallman committed
41
Lisp_Object Qenable_recursive_minibuffers;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
42

43 44 45 46
/* Non-nil means treat the mark as active
   even if mark_active is 0.  */
Lisp_Object Vmark_even_if_inactive;

47 48
Lisp_Object Vmouse_leave_buffer_hook, Qmouse_leave_buffer_hook;

49
Lisp_Object Qlist, Qlet, Qletx, Qsave_excursion;
50 51 52 53
static Lisp_Object preserved_fns;

/* Marker used within call-interactively to refer to point.  */
static Lisp_Object point_marker;
54

55 56 57 58 59
/* Buffer for the prompt text used in Fcall_interactively.  */
static char *callint_message;

/* Allocated length of that buffer.  */
static int callint_message_size;
60

Michael I. Bushnell's avatar
Michael I. Bushnell committed
61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87
/* This comment supplies the doc string for interactive,
   for make-docfile to see.  We cannot put this in the real DEFUN
   due to limits in the Unix cpp.

DEFUN ("interactive", Ffoo, Sfoo, 0, 0, 0,
 "Specify a way of parsing arguments for interactive use of a function.\n\
For example, write\n\
  (defun foo (arg) \"Doc string\" (interactive \"p\") ...use arg...)\n\
to make ARG be the prefix argument when `foo' is called as a command.\n\
The \"call\" to `interactive' is actually a declaration rather than a function;\n\
 it tells `call-interactively' how to read arguments\n\
 to pass to the function.\n\
When actually called, `interactive' just returns nil.\n\
\n\
The argument of `interactive' is usually a string containing a code letter\n\
 followed by a prompt.  (Some code letters do not use I/O to get\n\
 the argument and do not need prompts.)  To prompt for multiple arguments,\n\
 give a code letter, its prompt, a newline, and another code letter, etc.\n\
 Prompts are passed to format, and may use % escapes to print the\n\
 arguments that have already been read.\n\
If the argument is not a string, it is evaluated to get a list of\n\
 arguments to pass to the function.\n\
Just `(interactive)' means pass no args when calling interactively.\n\
\nCode letters available are:\n\
a -- Function name: symbol with a function definition.\n\
b -- Name of existing buffer.\n\
B -- Name of buffer, possibly nonexistent.\n\
88
c -- Character (no input method is used).\n\
Michael I. Bushnell's avatar
Michael I. Bushnell committed
89 90 91
C -- Command name: symbol with interactive function definition.\n\
d -- Value of point as number.  Does not do I/O.\n\
D -- Directory name.\n\
92 93 94
e -- Parametrized event (i.e., one that's a list) that invoked this command.\n\
     If used more than once, the Nth `e' returns the Nth parameterized event.\n\
     This skips events that are integers or symbols.\n\
Michael I. Bushnell's avatar
Michael I. Bushnell committed
95 96
f -- Existing file name.\n\
F -- Possibly nonexistent file name.\n\
97
i -- Ignored, i.e. always nil.  Does not do I/O.\n\
Richard M. Stallman's avatar
Richard M. Stallman committed
98 99
k -- Key sequence (downcase the last event if needed to get a definition).\n\
K -- Key sequence to be redefined (do not downcase the last event).\n\
Michael I. Bushnell's avatar
Michael I. Bushnell committed
100
m -- Value of mark as number.  Does not do I/O.\n\
101
M -- Any string.  Inherits the current input method.\n\
Michael I. Bushnell's avatar
Michael I. Bushnell committed
102
n -- Number read using minibuffer.\n\
Richard M. Stallman's avatar
Richard M. Stallman committed
103
N -- Raw prefix arg, or if none, do like code `n'.\n\
Michael I. Bushnell's avatar
Michael I. Bushnell committed
104 105 106
p -- Prefix arg converted to number.  Does not do I/O.\n\
P -- Prefix arg in raw form.  Does not do I/O.\n\
r -- Region: point and mark as 2 numeric args, smallest first.  Does no I/O.\n\
107
s -- Any string.  Does not inherit the current input method.\n\
Michael I. Bushnell's avatar
Michael I. Bushnell committed
108 109 110 111
S -- Any symbol.\n\
v -- Variable name: symbol that is user-variable-p.\n\
x -- Lisp expression read but not evaluated.\n\
X -- Lisp expression read and evaluated.\n\
112 113
z -- Coding system.\n\
Z -- Coding system, nil if no prefix arg.\n\
Michael I. Bushnell's avatar
Michael I. Bushnell committed
114 115 116
In addition, if the string begins with `*'\n\
 then an error is signaled if the buffer is read-only.\n\
 This happens before reading any arguments.\n\
Jim Blandy's avatar
Jim Blandy committed
117 118 119 120 121
If the string begins with `@', then Emacs searches the key sequence\n\
 which invoked the command for its first mouse click (or any other\n\
 event which specifies a window), and selects that window before\n\
 reading any arguments.  You may use both `@' and `*'; they are\n\
 processed in the order that they appear." */
Michael I. Bushnell's avatar
Michael I. Bushnell committed
122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137

/* ARGSUSED */
DEFUN ("interactive", Finteractive, Sinteractive, 0, UNEVALLED, 0,
  0 /* See immediately above */)
  (args)
     Lisp_Object args;
{
  return Qnil;
}

/* Quotify EXP: if EXP is constant, return it.
   If EXP is not constant, return (quote EXP).  */
Lisp_Object
quotify_arg (exp)
     register Lisp_Object exp;
{
138
  if (!INTEGERP (exp) && !STRINGP (exp)
Jim Blandy's avatar
Jim Blandy committed
139
      && !NILP (exp) && !EQ (exp, Qt))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165
    return Fcons (Qquote, Fcons (exp, Qnil));

  return exp;
}

/* Modify EXP by quotifying each element (except the first).  */
Lisp_Object
quotify_args (exp)
     Lisp_Object exp;
{
  register Lisp_Object tail;
  register struct Lisp_Cons *ptr;
  for (tail = exp; CONSP (tail); tail = ptr->cdr)
    {
      ptr = XCONS (tail);
      ptr->car = quotify_arg (ptr->car);
    }
  return exp;
}

char *callint_argfuns[]
    = {"", "point", "mark", "region-beginning", "region-end"};

static void
check_mark ()
{
166 167
  Lisp_Object tem;
  tem = Fmarker_buffer (current_buffer->mark);
Jim Blandy's avatar
Jim Blandy committed
168
  if (NILP (tem) || (XBUFFER (tem) != current_buffer))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
169
    error ("The mark is not set now");
170 171 172
  if (!NILP (Vtransient_mark_mode) && NILP (Vmark_even_if_inactive)
      && NILP (current_buffer->mark_active))
    Fsignal (Qmark_inactive, Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
173 174 175
}


176
DEFUN ("call-interactively", Fcall_interactively, Scall_interactively, 1, 3, 0,
Michael I. Bushnell's avatar
Michael I. Bushnell committed
177
  "Call FUNCTION, reading args according to its interactive calling specs.\n\
178
Return the value FUNCTION returns.\n\
Michael I. Bushnell's avatar
Michael I. Bushnell committed
179 180 181 182 183 184 185
The function contains a specification of how to do the argument reading.\n\
In the case of user-defined functions, this is specified by placing a call\n\
to the function `interactive' at the top level of the function body.\n\
See `interactive'.\n\
\n\
Optional second arg RECORD-FLAG non-nil\n\
means unconditionally put this command in the command-history.\n\
186
Otherwise, this is done only if an arg is read using the minibuffer.")
187 188
  (function, record_flag, keys)
     Lisp_Object function, record_flag, keys;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
189 190 191 192 193 194 195
{
  Lisp_Object *args, *visargs;
  unsigned char **argstrings;
  Lisp_Object fun;
  Lisp_Object funcar;
  Lisp_Object specs;
  Lisp_Object teml;
Richard M. Stallman's avatar
Richard M. Stallman committed
196 197
  Lisp_Object enable;
  int speccount = specpdl_ptr - specpdl;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
198

199 200
  /* The index of the next element of this_command_keys to examine for
     the 'e' interactive code.  */
Jim Blandy's avatar
Jim Blandy committed
201
  int next_event;
202

Michael I. Bushnell's avatar
Michael I. Bushnell committed
203 204 205
  Lisp_Object prefix_arg;
  unsigned char *string;
  unsigned char *tem;
Jim Blandy's avatar
Jim Blandy committed
206 207 208 209

  /* If varies[i] > 0, the i'th argument shouldn't just have its value
     in this call quoted in the command history.  It should be
     recorded as a call to the function named callint_argfuns[varies[i]].  */
Michael I. Bushnell's avatar
Michael I. Bushnell committed
210
  int *varies;
Jim Blandy's avatar
Jim Blandy committed
211

Michael I. Bushnell's avatar
Michael I. Bushnell committed
212 213 214 215 216 217
  register int i, j;
  int count, foo;
  char prompt1[100];
  char *tem1;
  int arg_from_tty = 0;
  struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
218 219 220 221 222 223 224 225 226
  int key_count;

  if (NILP (keys))
    keys = this_command_keys, key_count = this_command_key_count;
  else
    {
      CHECK_VECTOR (keys, 3);
      key_count = XVECTOR (keys)->size;
    }
Michael I. Bushnell's avatar
Michael I. Bushnell committed
227

Jim Blandy's avatar
Jim Blandy committed
228
  /* Save this now, since use of minibuffer will clobber it. */
229
  prefix_arg = Vcurrent_prefix_arg;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
230

Jim Blandy's avatar
Jim Blandy committed
231
 retry:
Michael I. Bushnell's avatar
Michael I. Bushnell committed
232

233
  if (SYMBOLP (function))
234
    enable = Fget (function, Qenable_recursive_minibuffers);
Richard M. Stallman's avatar
Richard M. Stallman committed
235

Jim Blandy's avatar
Jim Blandy committed
236
  fun = indirect_function (function);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
237 238 239 240 241 242 243 244

  specs = Qnil;
  string = 0;

  /* Decode the kind of function.  Either handle it and return,
     or go to `lose' if not interactive, or go to `retry'
     to specify a different function, or set either STRING or SPECS.  */

245
  if (SUBRP (fun))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
246 247 248 249 250
    {
      string = (unsigned char *) XSUBR (fun)->prompt;
      if (!string)
	{
	lose:
251
	  function = wrong_type_argument (Qcommandp, function);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
252 253
	  goto retry;
	}
254
      if ((EMACS_INT) string == 1)
Michael I. Bushnell's avatar
Michael I. Bushnell committed
255 256 257
	/* Let SPECS (which is nil) be used as the args.  */
	string = 0;
    }
258
  else if (COMPILEDP (fun))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
259
    {
Roland McGrath's avatar
Roland McGrath committed
260
      if ((XVECTOR (fun)->size & PSEUDOVECTOR_SIZE_MASK) <= COMPILED_INTERACTIVE)
Michael I. Bushnell's avatar
Michael I. Bushnell committed
261 262 263 264 265 266 267 268 269 270 271 272 273 274 275
	goto lose;
      specs = XVECTOR (fun)->contents[COMPILED_INTERACTIVE];
    }
  else if (!CONSP (fun))
    goto lose;
  else if (funcar = Fcar (fun), EQ (funcar, Qautoload))
    {
      GCPRO2 (function, prefix_arg);
      do_autoload (fun, function);
      UNGCPRO;
      goto retry;
    }
  else if (EQ (funcar, Qlambda))
    {
      specs = Fassq (Qinteractive, Fcdr (Fcdr (fun)));
Jim Blandy's avatar
Jim Blandy committed
276
      if (NILP (specs))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
277 278 279 280
	goto lose;
      specs = Fcar (Fcdr (specs));
    }
  else if (EQ (funcar, Qmocklisp))
281
    {
282
      single_kboard_state ();
283 284
      return ml_apply (fun, Qinteractive);
    }
Michael I. Bushnell's avatar
Michael I. Bushnell committed
285 286 287
  else
    goto lose;

Jim Blandy's avatar
Jim Blandy committed
288
  /* If either specs or string is set to a string, use it.  */
289
  if (STRINGP (specs))
Jim Blandy's avatar
Jim Blandy committed
290 291 292
    {
      /* Make a copy of string so that if a GC relocates specs,
	 `string' will still be valid.  */
293 294 295
      string = (unsigned char *) alloca (STRING_BYTES (XSTRING (specs)) + 1);
      bcopy (XSTRING (specs)->data, string,
	     STRING_BYTES (XSTRING (specs)) + 1);
Jim Blandy's avatar
Jim Blandy committed
296
    }
Michael I. Bushnell's avatar
Michael I. Bushnell committed
297 298
  else if (string == 0)
    {
299
      Lisp_Object input;
300
      i = num_input_events;
301 302
      input = specs;
      /* Compute the arg values using the user's expression.  */
303
      specs = Feval (specs);
304
      if (i != num_input_events || !NILP (record_flag))
305 306 307 308 309 310 311 312 313 314
	{
	  /* We should record this command on the command history.  */
	  Lisp_Object values, car;
	  /* Make a copy of the list of values, for the command history,
	     and turn them into things we can eval.  */
	  values = quotify_args (Fcopy_sequence (specs));
	  /* If the list of args was produced with an explicit call to `list',
	     look for elements that were computed with (region-beginning)
	     or (region-end), and put those expressions into VALUES
	     instead of the present values.  */
315
	  if (CONSP (input))
316
	    {
317 318 319 320
	      car = XCONS (input)->car;
	      /* Skip through certain special forms.  */
	      while (EQ (car, Qlet) || EQ (car, Qletx)
		     || EQ (car, Qsave_excursion))
321
		{
322 323 324 325 326 327 328 329 330 331 332 333 334
		  while (CONSP (XCONS (input)->cdr))
		    input = XCONS (input)->cdr;
		  input = XCONS (input)->car;
		  if (!CONSP (input))
		    break;
		  car = XCONS (input)->car;
		}
	      if (EQ (car, Qlist))
		{
		  Lisp_Object intail, valtail;
		  for (intail = Fcdr (input), valtail = values;
		       CONSP (valtail);
		       intail = Fcdr (intail), valtail = Fcdr (valtail))
335
		    {
336 337 338 339 340 341 342 343 344
		      Lisp_Object elt;
		      elt = Fcar (intail);
		      if (CONSP (elt))
			{
			  Lisp_Object presflag;
			  presflag = Fmemq (Fcar (elt), preserved_fns);
			  if (!NILP (presflag))
			    Fsetcar (valtail, Fcar (intail));
			}
345 346 347 348 349
		    }
		}
	    }
	  Vcommand_history
	    = Fcons (Fcons (function, values), Vcommand_history);
350 351 352 353 354 355 356 357

	  /* Don't keep command history around forever.  */
	  if (NUMBERP (Vhistory_length) && XINT (Vhistory_length) > 0)
	    {
	      teml = Fnthcdr (Vhistory_length, Vcommand_history);
	      if (CONSP (teml))
		XCONS (teml)->cdr = Qnil;
	    }
358
	}
359
      single_kboard_state ();
Michael I. Bushnell's avatar
Michael I. Bushnell committed
360 361 362 363 364
      return apply1 (function, specs);
    }

  /* Here if function specifies a string to control parsing the defaults */

Jim Blandy's avatar
Jim Blandy committed
365
  /* Set next_event to point to the first event with parameters.  */
366 367
  for (next_event = 0; next_event < key_count; next_event++)
    if (EVENT_HAS_PARAMETERS (XVECTOR (keys)->contents[next_event]))
Jim Blandy's avatar
Jim Blandy committed
368 369
      break;
  
370
  /* Handle special starting chars `*' and `@'.  Also `-'.  */
371
  /* Note that `+' is reserved for user extensions.  */
Michael I. Bushnell's avatar
Michael I. Bushnell committed
372 373
  while (1)
    {
374
      if (*string == '+')
375 376
	error ("`+' is not used in `interactive' for ordinary commands");
      else if (*string == '*')
Michael I. Bushnell's avatar
Michael I. Bushnell committed
377 378
	{
	  string++;
Jim Blandy's avatar
Jim Blandy committed
379
	  if (!NILP (current_buffer->read_only))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
380 381
	    Fbarf_if_buffer_read_only ();
	}
382 383 384
      /* Ignore this for semi-compatibility with Lucid.  */
      else if (*string == '-')
	string++;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
385 386
      else if (*string == '@')
	{
387
	  Lisp_Object event;
Jim Blandy's avatar
Jim Blandy committed
388

389
	  event = XVECTOR (keys)->contents[next_event];
Jim Blandy's avatar
Jim Blandy committed
390
	  if (EVENT_HAS_PARAMETERS (event)
391
	      && (event = XCONS (event)->cdr, CONSP (event))
392
	      && (event = XCONS (event)->car, CONSP (event))
Karl Heuer's avatar
Karl Heuer committed
393
	      && (event = XCONS (event)->car, WINDOWP (event)))
394
	    {
Karl Heuer's avatar
Karl Heuer committed
395
	      if (MINI_WINDOW_P (XWINDOW (event))
396
		  && ! (minibuf_level > 0 && EQ (event, minibuf_window)))
397
		error ("Attempt to select inactive minibuffer window");
398 399 400 401 402

	      /* If the current buffer wants to clean up, let it.  */
	      if (!NILP (Vmouse_leave_buffer_hook))
		call1 (Vrun_hooks, Qmouse_leave_buffer_hook);

403 404
	      Fselect_window (event);
	    }
Michael I. Bushnell's avatar
Michael I. Bushnell committed
405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423
	  string++;
	}
      else break;
    }

  /* Count the number of arguments the interactive spec would have
     us give to the function.  */
  tem = string;
  for (j = 0; *tem; j++)
    {
      /* 'r' specifications ("point and mark as 2 numeric args")
	 produce *two* arguments.  */
      if (*tem == 'r') j++;
      tem = (unsigned char *) index (tem, '\n');
      if (tem)
	tem++;
      else
	tem = (unsigned char *) "";
    }
424
  count = j;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441

  args = (Lisp_Object *) alloca ((count + 1) * sizeof (Lisp_Object));
  visargs = (Lisp_Object *) alloca ((count + 1) * sizeof (Lisp_Object));
  argstrings = (unsigned char **) alloca ((count + 1) * sizeof (char *));
  varies = (int *) alloca ((count + 1) * sizeof (int));

  for (i = 0; i < (count + 1); i++)
    {
      args[i] = Qnil;
      visargs[i] = Qnil;
      varies[i] = 0;
    }

  GCPRO4 (prefix_arg, function, *args, *visargs);
  gcpro3.nvars = (count + 1);
  gcpro4.nvars = (count + 1);

Richard M. Stallman's avatar
Richard M. Stallman committed
442 443 444
  if (!NILP (enable))
    specbind (Qenable_recursive_minibuffers, Qt);

Michael I. Bushnell's avatar
Michael I. Bushnell committed
445
  tem = string;
446
  for (i = 1; *tem; i++)
Michael I. Bushnell's avatar
Michael I. Bushnell committed
447 448 449 450 451 452 453 454 455
    {
      strncpy (prompt1, tem + 1, sizeof prompt1 - 1);
      prompt1[sizeof prompt1 - 1] = 0;
      tem1 = index (prompt1, '\n');
      if (tem1) *tem1 = 0;
      /* Fill argstrings with a vector of C strings
	 corresponding to the Lisp strings in visargs.  */
      for (j = 1; j < i; j++)
	argstrings[j]
456 457 458
	  = (EQ (visargs[j], Qnil)
	     ? (unsigned char *) ""
	     : XSTRING (visargs[j])->data);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
459

460 461 462 463 464 465 466 467
      /* Process the format-string in prompt1, putting the output
	 into callint_message.  Make callint_message bigger if necessary.
	 We don't use a buffer on the stack, because the contents
	 need to stay stable for a while.  */
      while (1)
	{
	  int nchars = doprnt (callint_message, callint_message_size,
			       prompt1, (char *)0,
468
			       j - 1, (char **) argstrings + 1);
469 470 471 472 473 474
	  if (nchars < callint_message_size)
	    break;
	  callint_message_size *= 2;
	  callint_message
	    = (char *) xrealloc (callint_message, callint_message_size);
	}
Michael I. Bushnell's avatar
Michael I. Bushnell committed
475 476 477 478

      switch (*tem)
	{
	case 'a':		/* Symbol defined as a function */
479
	  visargs[i] = Fcompleting_read (build_string (callint_message),
480
					 Vobarray, Qfboundp, Qt,
481
					 Qnil, Qnil, Qnil, Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
482 483 484 485 486 487 488 489
	  /* Passing args[i] directly stimulates compiler bug */
	  teml = visargs[i];
	  args[i] = Fintern (teml, Qnil);
	  break;

	case 'b':   		/* Name of existing buffer */
	  args[i] = Fcurrent_buffer ();
	  if (EQ (selected_window, minibuf_window))
490
	    args[i] = Fother_buffer (args[i], Qnil, Qnil);
491
	  args[i] = Fread_buffer (build_string (callint_message), args[i], Qt);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
492 493 494
	  break;

	case 'B':		/* Name of buffer, possibly nonexistent */
495
	  args[i] = Fread_buffer (build_string (callint_message),
496
				  Fother_buffer (Fcurrent_buffer (), Qnil, Qnil),
497
				  Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
498 499 500
	  break;

        case 'c':		/* Character */
501
	  args[i] = Fread_char (build_string (callint_message), Qnil);
502
	  message1_nolog ((char *) 0);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
503 504 505 506 507 508
	  /* Passing args[i] directly stimulates compiler bug */
	  teml = args[i];
	  visargs[i] = Fchar_to_string (teml);
	  break;

	case 'C':		/* Command: symbol with interactive function */
509
	  visargs[i] = Fcompleting_read (build_string (callint_message),
510
					 Vobarray, Qcommandp,
511
					 Qt, Qnil, Qnil, Qnil, Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
512 513 514 515 516 517
	  /* Passing args[i] directly stimulates compiler bug */
	  teml = visargs[i];
	  args[i] = Fintern (teml, Qnil);
	  break;

	case 'd':		/* Value of point.  Does not do I/O.  */
518
	  set_marker_both (point_marker, Qnil, PT, PT_BYTE);
519
	  args[i] = point_marker;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
520 521 522 523 524
	  /* visargs[i] = Qnil; */
	  varies[i] = 1;
	  break;

	case 'D':		/* Directory name. */
525
	  args[i] = Fread_file_name (build_string (callint_message), Qnil,
Michael I. Bushnell's avatar
Michael I. Bushnell committed
526 527 528 529
				     current_buffer->directory, Qlambda, Qnil);
	  break;

	case 'f':		/* Existing file name. */
530
	  args[i] = Fread_file_name (build_string (callint_message),
Michael I. Bushnell's avatar
Michael I. Bushnell committed
531 532 533 534
				     Qnil, Qnil, Qlambda, Qnil);
	  break;

	case 'F':		/* Possibly nonexistent file name. */
535
	  args[i] = Fread_file_name (build_string (callint_message),
Michael I. Bushnell's avatar
Michael I. Bushnell committed
536 537 538
				     Qnil, Qnil, Qnil, Qnil);
	  break;

539 540 541 542
	case 'i':		/* Ignore an argument -- Does not do I/O */
	  varies[i] = -1;
	  break;

543
	case 'k':		/* Key sequence. */
544 545 546 547
	  {
	    int speccount1 = specpdl_ptr - specpdl;
	    specbind (Qcursor_in_echo_area, Qt);
	    args[i] = Fread_key_sequence (build_string (callint_message),
548
					  Qnil, Qnil, Qnil, Qnil);
549 550 551
	    unbind_to (speccount1, Qnil);
	    teml = args[i];
	    visargs[i] = Fkey_description (teml);
552 553 554 555 556 557 558 559 560 561 562

	    /* If the key sequence ends with a down-event,
	       discard the following up-event.  */
	    teml = Faref (args[i], make_number (XINT (Flength (args[i])) - 1));
	    if (CONSP (teml))
	      teml = XCONS (teml)->car;
	    if (SYMBOLP (teml))
	      {
		Lisp_Object tem2;

		teml = Fget (teml, intern ("event-symbol-elements"));
563 564
		/* Ignore first element, which is the base key.  */
		tem2 = Fmemq (intern ("down"), Fcdr (teml));
565
		if (! NILP (tem2))
566
		  Fread_event (Qnil, Qnil);
567
	      }
568
	  }
569 570 571
	  break;

	case 'K':		/* Key sequence to be defined. */
572 573 574 575
	  {
	    int speccount1 = specpdl_ptr - specpdl;
	    specbind (Qcursor_in_echo_area, Qt);
	    args[i] = Fread_key_sequence (build_string (callint_message),
576
					  Qnil, Qt, Qnil, Qnil);
577 578 579
	    teml = args[i];
	    visargs[i] = Fkey_description (teml);
	    unbind_to (speccount1, Qnil);
580 581 582 583 584 585 586 587 588 589 590

	    /* If the key sequence ends with a down-event,
	       discard the following up-event.  */
	    teml = Faref (args[i], make_number (XINT (Flength (args[i])) - 1));
	    if (CONSP (teml))
	      teml = XCONS (teml)->car;
	    if (SYMBOLP (teml))
	      {
		Lisp_Object tem2;

		teml = Fget (teml, intern ("event-symbol-elements"));
591 592
		/* Ignore first element, which is the base key.  */
		tem2 = Fmemq (intern ("down"), Fcdr (teml));
593
		if (! NILP (tem2))
594
		  Fread_event (Qnil, Qnil);
595
	      }
596
	  }
Michael I. Bushnell's avatar
Michael I. Bushnell committed
597 598
	  break;

599
	case 'e':		/* The invoking event.  */
600
	  if (next_event >= key_count)
601
	    error ("%s must be bound to an event with parameters",
602
		   (SYMBOLP (function)
Jim Blandy's avatar
Jim Blandy committed
603
		    ? (char *) XSYMBOL (function)->name->data
604
		    : "command"));
605
	  args[i] = XVECTOR (keys)->contents[next_event++];
Jim Blandy's avatar
Jim Blandy committed
606
	  varies[i] = -1;
Jim Blandy's avatar
Jim Blandy committed
607 608

	  /* Find the next parameterized event.  */
609
	  while (next_event < key_count
Jim Blandy's avatar
Jim Blandy committed
610
		 && ! (EVENT_HAS_PARAMETERS
611
		       (XVECTOR (keys)->contents[next_event])))
Jim Blandy's avatar
Jim Blandy committed
612 613
	    next_event++;

Jim Blandy's avatar
Jim Blandy committed
614 615
	  break;

Michael I. Bushnell's avatar
Michael I. Bushnell committed
616 617 618
	case 'm':		/* Value of mark.  Does not do I/O.  */
	  check_mark ();
	  /* visargs[i] = Qnil; */
619
	  args[i] = current_buffer->mark;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
620 621 622
	  varies[i] = 2;
	  break;

623 624 625 626 627 628
	case 'M':		/* String read via minibuffer with
				   inheriting the current input method.  */
	  args[i] = Fread_string (build_string (callint_message),
				  Qnil, Qnil, Qnil, Qt);
	  break;

Michael I. Bushnell's avatar
Michael I. Bushnell committed
629
	case 'N':		/* Prefix arg, else number from minibuffer */
Jim Blandy's avatar
Jim Blandy committed
630
	  if (!NILP (prefix_arg))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
631 632
	    goto have_prefix_arg;
	case 'n':		/* Read number from minibuffer.  */
633 634 635 636 637 638 639 640
	  {
	    int first = 1;
	    do
	      {
		Lisp_Object tem;
		if (!  first)
		  {
		    message ("Please enter a number.");
641
		    sit_for (1, 0, 0, 0, 0);
642 643 644 645
		  }
		first = 0;

		tem = Fread_from_minibuffer (build_string (callint_message),
646 647
					     Qnil, Qnil, Qnil, Qnil, Qnil,
					     Qnil);
648 649 650 651 652 653 654
		if (! STRINGP (tem) || XSTRING (tem)->size == 0)
		  args[i] = Qnil;
		else
		  args[i] = Fread (tem);
	      }
	    while (! NUMBERP (args[i]));
	  }
Michael I. Bushnell's avatar
Michael I. Bushnell committed
655 656 657 658 659 660 661 662 663 664
	  visargs[i] = last_minibuf_string;
	  break;

	case 'P':		/* Prefix arg in raw form.  Does no I/O.  */
	  args[i] = prefix_arg;
	  /* visargs[i] = Qnil; */
	  varies[i] = -1;
	  break;

	case 'p':		/* Prefix arg converted to number.  No I/O. */
665
	have_prefix_arg:
Michael I. Bushnell's avatar
Michael I. Bushnell committed
666 667 668 669 670 671 672
	  args[i] = Fprefix_numeric_value (prefix_arg);
	  /* visargs[i] = Qnil; */
	  varies[i] = -1;
	  break;

	case 'r':		/* Region, point and mark as 2 args. */
	  check_mark ();
673
	  set_marker_both (point_marker, Qnil, PT, PT_BYTE);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
674 675 676
	  /* visargs[i+1] = Qnil; */
	  foo = marker_position (current_buffer->mark);
	  /* visargs[i] = Qnil; */
677
	  args[i] = PT < foo ? point_marker : current_buffer->mark;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
678
	  varies[i] = 3;
679
	  args[++i] = PT > foo ? point_marker : current_buffer->mark;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
680 681 682
	  varies[i] = 4;
	  break;

683 684
	case 's':		/* String read via minibuffer without
				   inheriting the current input method.  */
685
	  args[i] = Fread_string (build_string (callint_message),
686
				  Qnil, Qnil, Qnil, Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
687 688 689
	  break;

	case 'S':		/* Any symbol.  */
690
	  visargs[i] = Fread_string (build_string (callint_message),
691
				     Qnil, Qnil, Qnil, Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
692 693 694 695 696 697 698
	  /* Passing args[i] directly stimulates compiler bug */
	  teml = visargs[i];
	  args[i] = Fintern (teml, Qnil);
	  break;

	case 'v':		/* Variable name: symbol that is
				   user-variable-p. */
699
	  args[i] = Fread_variable (build_string (callint_message), Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
700 701 702 703
	  visargs[i] = last_minibuf_string;
	  break;

	case 'x':		/* Lisp expression read but not evaluated */
704
	  args[i] = Fread_minibuffer (build_string (callint_message), Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
705 706 707 708
	  visargs[i] = last_minibuf_string;
	  break;

	case 'X':		/* Lisp expression read and evaluated */
709
	  args[i] = Feval_minibuffer (build_string (callint_message), Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
710 711 712
	  visargs[i] = last_minibuf_string;
 	  break;

713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728
	case 'Z':		/* Coding-system symbol, or ignore the
				   argument if no prefix */
	  if (NILP (prefix_arg))
	    {
	      args[i] = Qnil;
	      varies[i] = -1;
	    }
	  else 
	    {
	      args[i]
		= Fread_non_nil_coding_system (build_string (callint_message));
	      visargs[i] = last_minibuf_string;
	    }
	  break;

	case 'z':		/* Coding-system symbol or nil */
729
	  args[i] = Fread_coding_system (build_string (callint_message), Qnil);
730 731 732
	  visargs[i] = last_minibuf_string;
	  break;

733 734 735
	  /* We have a case for `+' so we get an error
	     if anyone tries to define one here.  */
	case '+':
Michael I. Bushnell's avatar
Michael I. Bushnell committed
736
	default:
737
	  error ("Invalid control letter `%c' (%03o) in interactive calling string",
Michael I. Bushnell's avatar
Michael I. Bushnell committed
738 739 740 741 742 743
		 *tem, *tem);
	}

      if (varies[i] == 0)
	arg_from_tty = 1;

744
      if (NILP (visargs[i]) && STRINGP (args[i]))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
745 746 747 748 749 750
	visargs[i] = args[i];

      tem = (unsigned char *) index (tem, '\n');
      if (tem) tem++;
      else tem = (unsigned char *) "";
    }
Richard M. Stallman's avatar
Richard M. Stallman committed
751
  unbind_to (speccount, Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
752 753 754 755 756

  QUIT;

  args[0] = function;

757
  if (arg_from_tty || !NILP (record_flag))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
758 759
    {
      visargs[0] = function;
Jim Blandy's avatar
Jim Blandy committed
760
      for (i = 1; i < count + 1; i++)
761 762 763 764 765 766
	{
	  if (varies[i] > 0)
	    visargs[i] = Fcons (intern (callint_argfuns[varies[i]]), Qnil);
	  else
	    visargs[i] = quotify_arg (args[i]);
	}
Michael I. Bushnell's avatar
Michael I. Bushnell committed
767 768
      Vcommand_history = Fcons (Flist (count + 1, visargs),
				Vcommand_history);
769 770 771 772 773 774 775
      /* Don't keep command history around forever.  */
      if (NUMBERP (Vhistory_length) && XINT (Vhistory_length) > 0)
	{
	  teml = Fnthcdr (Vhistory_length, Vcommand_history);
	  if (CONSP (teml))
	    XCONS (teml)->cdr = Qnil;
	}
Michael I. Bushnell's avatar
Michael I. Bushnell committed
776 777
    }

778 779
  /* If we used a marker to hold point, mark, or an end of the region,
     temporarily, convert it to an integer now.  */
780
  for (i = 1; i <= count; i++)
781 782 783
    if (varies[i] >= 1 && varies[i] <= 4)
      XSETINT (args[i], marker_position (args[i]));

784
  single_kboard_state ();
785

Michael I. Bushnell's avatar
Michael I. Bushnell committed
786 787 788 789 790 791 792 793 794 795 796 797
  {
    Lisp_Object val;
    specbind (Qcommand_debug_status, Qnil);

    val = Ffuncall (count + 1, args);
    UNGCPRO;
    return unbind_to (speccount, val);
  }
}  

DEFUN ("prefix-numeric-value", Fprefix_numeric_value, Sprefix_numeric_value,
  1, 1, 0,
798
  "Return numeric meaning of raw prefix argument RAW.\n\
Michael I. Bushnell's avatar
Michael I. Bushnell committed
799 800 801 802 803 804 805
A raw prefix argument is what you get from `(interactive \"P\")'.\n\
Its numeric meaning is what you would get from `(interactive \"p\")'.")
  (raw)
     Lisp_Object raw;
{
  Lisp_Object val;
  
Jim Blandy's avatar
Jim Blandy committed
806
  if (NILP (raw))
807
    XSETFASTINT (val, 1);
808
  else if (EQ (raw, Qminus))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
809
    XSETINT (val, -1);
810
  else if (CONSP (raw) && INTEGERP (XCONS (raw)->car))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
811
    XSETINT (val, XINT (XCONS (raw)->car));
812
  else if (INTEGERP (raw))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
813 814
    val = raw;
  else
815
    XSETFASTINT (val, 1);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
816 817 818 819

  return val;
}

Andreas Schwab's avatar
Andreas Schwab committed
820
void
Michael I. Bushnell's avatar
Michael I. Bushnell committed
821 822
syms_of_callint ()
{
823 824 825
  point_marker = Fmake_marker ();
  staticpro (&point_marker);

826 827 828 829 830 831 832 833
  preserved_fns = Fcons (intern ("region-beginning"),
			 Fcons (intern ("region-end"),
				Fcons (intern ("point"),
				       Fcons (intern ("mark"), Qnil))));
  staticpro (&preserved_fns);

  Qlist = intern ("list");
  staticpro (&Qlist);
834 835 836 837 838 839
  Qlet = intern ("let");
  staticpro (&Qlet);
  Qletx = intern ("let*");
  staticpro (&Qletx);
  Qsave_excursion = intern ("save-excursion");
  staticpro (&Qsave_excursion);
840

Michael I. Bushnell's avatar
Michael I. Bushnell committed
841 842 843
  Qminus = intern ("-");
  staticpro (&Qminus);

Richard M. Stallman's avatar
Richard M. Stallman committed
844 845 846
  Qplus = intern ("+");
  staticpro (&Qplus);

Michael I. Bushnell's avatar
Michael I. Bushnell committed
847 848 849 850 851 852
  Qcall_interactively = intern ("call-interactively");
  staticpro (&Qcall_interactively);

  Qcommand_debug_status = intern ("command-debug-status");
  staticpro (&Qcommand_debug_status);

Richard M. Stallman's avatar
Richard M. Stallman committed
853 854 855
  Qenable_recursive_minibuffers = intern ("enable-recursive-minibuffers");
  staticpro (&Qenable_recursive_minibuffers);

856 857 858
  Qmouse_leave_buffer_hook = intern ("mouse-leave-buffer-hook");
  staticpro (&Qmouse_leave_buffer_hook);

859 860 861 862
  callint_message_size = 100;
  callint_message = (char *) xmalloc (callint_message_size);


863
  DEFVAR_KBOARD ("prefix-arg", Vprefix_arg,
864 865 866 867 868 869 870 871 872 873
    "The value of the prefix argument for the next editing command.\n\
It may be a number, or the symbol `-' for just a minus sign as arg,\n\
or a list whose car is a number for just one or more C-U's\n\
or nil if no argument has been specified.\n\
\n\
You cannot examine this variable to find the argument for this command\n\
since it has been set to nil by the time you can look.\n\
Instead, you should use the variable `current-prefix-arg', although\n\
normally commands can get this prefix argument with (interactive \"P\").");

874 875 876 877
  DEFVAR_KBOARD ("last-prefix-arg", Vlast_prefix_arg,
    "The value of the prefix argument for the previous editing command.\n\
See `prefix-arg' for the meaning of the value.");

878 879 880 881 882 883 884 885
  DEFVAR_LISP ("current-prefix-arg", &Vcurrent_prefix_arg,
    "The value of the prefix argument for this editing command.\n\
It may be a number, or the symbol `-' for just a minus sign as arg,\n\
or a list whose car is a number for just one or more C-U's\n\
or nil if no argument has been specified.\n\
This is what `(interactive \"P\")' returns.");
  Vcurrent_prefix_arg = Qnil;

Michael I. Bushnell's avatar
Michael I. Bushnell committed
886 887 888 889 890 891 892 893 894 895 896
  DEFVAR_LISP ("command-history", &Vcommand_history,
    "List of recent commands that read arguments from terminal.\n\
Each command is represented as a form to evaluate.");
  Vcommand_history = Qnil;

  DEFVAR_LISP ("command-debug-status", &Vcommand_debug_status,
    "Debugging status of current interactive command.\n\
Bound each time `call-interactively' is called;\n\
may be set by the debugger as a reminder for itself.");
  Vcommand_debug_status = Qnil;

897
  DEFVAR_LISP ("mark-even-if-inactive", &Vmark_even_if_inactive,
898 899 900 901 902 903 904
    "*Non-nil means you can use the mark even when inactive.\n\
This option makes a difference in Transient Mark mode.\n\
When the option is non-nil, deactivation of the mark\n\
turns off region highlighting, but commands that use the mark\n\
behave as if the mark were still active.");
  Vmark_even_if_inactive = Qnil;

905 906 907 908 909 910
  DEFVAR_LISP ("mouse-leave-buffer-hook", &Vmouse_leave_buffer_hook,
    "Hook to run when about to switch windows with a mouse command.\n\
Its purpose is to give temporary modes such as Isearch mode\n\
a way to turn themselves off when a mouse command switches windows.");
  Vmouse_leave_buffer_hook = Qnil;

Michael I. Bushnell's avatar
Michael I. Bushnell committed
911 912 913 914
  defsubr (&Sinteractive);
  defsubr (&Scall_interactively);
  defsubr (&Sprefix_numeric_value);
}