callint.c 22.7 KB
Newer Older
Michael I. Bushnell's avatar
Michael I. Bushnell committed
1
/* Call a Lisp function interactively.
2
   Copyright (C) 1985, 1986, 1993, 1994, 1995 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 18 19 20
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
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */


21
#include <config.h>
Michael I. Bushnell's avatar
Michael I. Bushnell committed
22 23 24
#include "lisp.h"
#include "buffer.h"
#include "commands.h"
Jim Blandy's avatar
Jim Blandy committed
25
#include "keyboard.h"
Michael I. Bushnell's avatar
Michael I. Bushnell committed
26 27 28 29 30
#include "window.h"
#include "mocklisp.h"

extern char *index ();

31
Lisp_Object Vcurrent_prefix_arg, Qminus, Qplus;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
32 33 34 35
Lisp_Object Qcall_interactively;
Lisp_Object Vcommand_history;

Lisp_Object Vcommand_debug_status, Qcommand_debug_status;
Richard M. Stallman's avatar
Richard M. Stallman committed
36
Lisp_Object Qenable_recursive_minibuffers;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
37

38 39 40 41
/* Non-nil means treat the mark as active
   even if mark_active is 0.  */
Lisp_Object Vmark_even_if_inactive;

42 43
Lisp_Object Vmouse_leave_buffer_hook, Qmouse_leave_buffer_hook;

44
Lisp_Object Qlist;
45 46 47 48
static Lisp_Object preserved_fns;

/* Marker used within call-interactively to refer to point.  */
static Lisp_Object point_marker;
49

50

Michael I. Bushnell's avatar
Michael I. Bushnell committed
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81
/* 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\
c -- Character.\n\
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\
82 83 84
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
85 86
f -- Existing file name.\n\
F -- Possibly nonexistent file name.\n\
Richard M. Stallman's avatar
Richard M. Stallman committed
87 88
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
89 90
m -- Value of mark as number.  Does not do I/O.\n\
n -- Number read using minibuffer.\n\
Richard M. Stallman's avatar
Richard M. Stallman committed
91
N -- Raw prefix arg, or if none, do like code `n'.\n\
Michael I. Bushnell's avatar
Michael I. Bushnell committed
92 93 94 95 96 97 98 99 100 101 102
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\
s -- Any string.\n\
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\
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
103 104 105 106 107
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
108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123

/* 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;
{
124
  if (!INTEGERP (exp) && !STRINGP (exp)
Jim Blandy's avatar
Jim Blandy committed
125
      && !NILP (exp) && !EQ (exp, Qt))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151
    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 ()
{
152 153
  Lisp_Object tem;
  tem = Fmarker_buffer (current_buffer->mark);
Jim Blandy's avatar
Jim Blandy committed
154
  if (NILP (tem) || (XBUFFER (tem) != current_buffer))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
155
    error ("The mark is not set now");
156 157 158
  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
159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180
}


DEFUN ("call-interactively", Fcall_interactively, Scall_interactively, 1, 2, 0,
  "Call FUNCTION, reading args according to its interactive calling specs.\n\
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\
Otherwise, this is done only if an arg is read using the minibuffer.")
  (function, record)
     Lisp_Object function, record;
{
  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
181 182
  Lisp_Object enable;
  int speccount = specpdl_ptr - specpdl;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
183

184 185
  /* The index of the next element of this_command_keys to examine for
     the 'e' interactive code.  */
Jim Blandy's avatar
Jim Blandy committed
186
  int next_event;
187

Michael I. Bushnell's avatar
Michael I. Bushnell committed
188 189 190
  Lisp_Object prefix_arg;
  unsigned char *string;
  unsigned char *tem;
Jim Blandy's avatar
Jim Blandy committed
191 192 193 194

  /* 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
195
  int *varies;
Jim Blandy's avatar
Jim Blandy committed
196

Michael I. Bushnell's avatar
Michael I. Bushnell committed
197 198 199 200 201 202 203 204
  register int i, j;
  int count, foo;
  char prompt[100];
  char prompt1[100];
  char *tem1;
  int arg_from_tty = 0;
  struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;

Jim Blandy's avatar
Jim Blandy committed
205
  /* Save this now, since use of minibuffer will clobber it. */
206
  prefix_arg = Vcurrent_prefix_arg;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
207

Jim Blandy's avatar
Jim Blandy committed
208
 retry:
Michael I. Bushnell's avatar
Michael I. Bushnell committed
209

210
  if (SYMBOLP (function))
211
    enable = Fget (function, Qenable_recursive_minibuffers);
Richard M. Stallman's avatar
Richard M. Stallman committed
212

Jim Blandy's avatar
Jim Blandy committed
213
  fun = indirect_function (function);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
214 215 216 217 218 219 220 221

  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.  */

222
  if (SUBRP (fun))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
223 224 225 226 227
    {
      string = (unsigned char *) XSUBR (fun)->prompt;
      if (!string)
	{
	lose:
228
	  function = wrong_type_argument (Qcommandp, function);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
229 230
	  goto retry;
	}
231
      if ((EMACS_INT) string == 1)
Michael I. Bushnell's avatar
Michael I. Bushnell committed
232 233 234
	/* Let SPECS (which is nil) be used as the args.  */
	string = 0;
    }
235
  else if (COMPILEDP (fun))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
236
    {
Roland McGrath's avatar
Roland McGrath committed
237
      if ((XVECTOR (fun)->size & PSEUDOVECTOR_SIZE_MASK) <= COMPILED_INTERACTIVE)
Michael I. Bushnell's avatar
Michael I. Bushnell committed
238 239 240 241 242 243 244 245 246 247 248 249 250 251 252
	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
253
      if (NILP (specs))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
254 255 256 257
	goto lose;
      specs = Fcar (Fcdr (specs));
    }
  else if (EQ (funcar, Qmocklisp))
258
    {
259
      single_kboard_state ();
260 261
      return ml_apply (fun, Qinteractive);
    }
Michael I. Bushnell's avatar
Michael I. Bushnell committed
262 263 264
  else
    goto lose;

Jim Blandy's avatar
Jim Blandy committed
265
  /* If either specs or string is set to a string, use it.  */
266
  if (STRINGP (specs))
Jim Blandy's avatar
Jim Blandy committed
267 268 269
    {
      /* Make a copy of string so that if a GC relocates specs,
	 `string' will still be valid.  */
Jim Blandy's avatar
Jim Blandy committed
270
      string = (unsigned char *) alloca (XSTRING (specs)->size + 1);
Jim Blandy's avatar
Jim Blandy committed
271 272
      bcopy (XSTRING (specs)->data, string, XSTRING (specs)->size + 1);
    }
Michael I. Bushnell's avatar
Michael I. Bushnell committed
273 274
  else if (string == 0)
    {
275
      Lisp_Object input;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
276
      i = num_input_chars;
277 278
      input = specs;
      /* Compute the arg values using the user's expression.  */
Michael I. Bushnell's avatar
Michael I. Bushnell committed
279
      specs = Feval (specs);
Jim Blandy's avatar
Jim Blandy committed
280
      if (i != num_input_chars || !NILP (record))
281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312
	{
	  /* 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.  */
	  car = Fcar (input);
	  if (EQ (car, Qlist))
	    {
	      Lisp_Object intail, valtail;
	      for (intail = Fcdr (input), valtail = values;
		   CONSP (valtail);
		   intail = Fcdr (intail), valtail = Fcdr (valtail))
		{
		  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));
		    }
		}
	    }
	  Vcommand_history
	    = Fcons (Fcons (function, values), Vcommand_history);
	}
313
      single_kboard_state ();
Michael I. Bushnell's avatar
Michael I. Bushnell committed
314 315 316 317 318
      return apply1 (function, specs);
    }

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

Jim Blandy's avatar
Jim Blandy committed
319 320 321 322 323 324
  /* Set next_event to point to the first event with parameters.  */
  for (next_event = 0; next_event < this_command_key_count; next_event++)
    if (EVENT_HAS_PARAMETERS
	(XVECTOR (this_command_keys)->contents[next_event]))
      break;
  
325
  /* Handle special starting chars `*' and `@'.  Also `-'.  */
326
  /* Note that `+' is reserved for user extensions.  */
Michael I. Bushnell's avatar
Michael I. Bushnell committed
327 328
  while (1)
    {
329
      if (*string == '+')
330 331
	error ("`+' is not used in `interactive' for ordinary commands");
      else if (*string == '*')
Michael I. Bushnell's avatar
Michael I. Bushnell committed
332 333
	{
	  string++;
Jim Blandy's avatar
Jim Blandy committed
334
	  if (!NILP (current_buffer->read_only))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
335 336
	    Fbarf_if_buffer_read_only ();
	}
337 338 339
      /* Ignore this for semi-compatibility with Lucid.  */
      else if (*string == '-')
	string++;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
340 341
      else if (*string == '@')
	{
342
	  Lisp_Object event;
Jim Blandy's avatar
Jim Blandy committed
343

344
	  event = XVECTOR (this_command_keys)->contents[next_event];
Jim Blandy's avatar
Jim Blandy committed
345
	  if (EVENT_HAS_PARAMETERS (event)
346
	      && (event = XCONS (event)->cdr, CONSP (event))
347
	      && (event = XCONS (event)->car, CONSP (event))
Karl Heuer's avatar
Karl Heuer committed
348
	      && (event = XCONS (event)->car, WINDOWP (event)))
349
	    {
Karl Heuer's avatar
Karl Heuer committed
350
	      if (MINI_WINDOW_P (XWINDOW (event))
351
		  && ! (minibuf_level > 0 && EQ (event, minibuf_window)))
352
		error ("Attempt to select inactive minibuffer window");
353 354 355 356 357

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

358 359
	      Fselect_window (event);
	    }
Michael I. Bushnell's avatar
Michael I. Bushnell committed
360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396
	  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 *) "";
    }
  count = j;

  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
397 398 399
  if (!NILP (enable))
    specbind (Qenable_recursive_minibuffers, Qt);

Michael I. Bushnell's avatar
Michael I. Bushnell committed
400
  tem = string;
Jim Blandy's avatar
Jim Blandy committed
401
  for (i = 1; *tem; i++)
Michael I. Bushnell's avatar
Michael I. Bushnell committed
402 403 404 405 406 407 408 409 410 411 412
    {
      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]
	  = EQ (visargs[j], Qnil)
	    ? (unsigned char *) ""
Jim Blandy's avatar
Jim Blandy committed
413
	      : XSTRING (visargs[j])->data;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
414

415 416
      doprnt (prompt, sizeof prompt, prompt1, (char *)0,
	      j - 1, argstrings + 1);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
417 418 419 420 421 422 423 424 425 426 427 428 429 430

      switch (*tem)
	{
	case 'a':		/* Symbol defined as a function */
	  visargs[i] = Fcompleting_read (build_string (prompt),
					 Vobarray, Qfboundp, Qt, Qnil, Qnil);
	  /* 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))
431
	    args[i] = Fother_buffer (args[i], Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
432 433 434 435 436
	  args[i] = Fread_buffer (build_string (prompt), args[i], Qt);
	  break;

	case 'B':		/* Name of buffer, possibly nonexistent */
	  args[i] = Fread_buffer (build_string (prompt),
437 438
				  Fother_buffer (Fcurrent_buffer (), Qnil),
				  Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457
	  break;

        case 'c':		/* Character */
	  message1 (prompt);
	  args[i] = Fread_char ();
	  /* Passing args[i] directly stimulates compiler bug */
	  teml = args[i];
	  visargs[i] = Fchar_to_string (teml);
	  break;

	case 'C':		/* Command: symbol with interactive function */
	  visargs[i] = Fcompleting_read (build_string (prompt),
					 Vobarray, Qcommandp, Qt, Qnil, Qnil);
	  /* 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.  */
458 459
	  Fset_marker (point_marker, make_number (PT), Qnil);
	  args[i] = point_marker;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478
	  /* visargs[i] = Qnil; */
	  varies[i] = 1;
	  break;

	case 'D':		/* Directory name. */
	  args[i] = Fread_file_name (build_string (prompt), Qnil,
				     current_buffer->directory, Qlambda, Qnil);
	  break;

	case 'f':		/* Existing file name. */
	  args[i] = Fread_file_name (build_string (prompt),
				     Qnil, Qnil, Qlambda, Qnil);
	  break;

	case 'F':		/* Possibly nonexistent file name. */
	  args[i] = Fread_file_name (build_string (prompt),
				     Qnil, Qnil, Qnil, Qnil);
	  break;

479
	case 'k':		/* Key sequence. */
480
	  args[i] = Fread_key_sequence (build_string (prompt), Qnil, Qnil, Qnil);
481 482 483 484 485
	  teml = args[i];
	  visargs[i] = Fkey_description (teml);
	  break;

	case 'K':		/* Key sequence to be defined. */
486
	  args[i] = Fread_key_sequence (build_string (prompt), Qnil, Qt, Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
487 488 489 490
	  teml = args[i];
	  visargs[i] = Fkey_description (teml);
	  break;

491 492 493
	case 'e':		/* The invoking event.  */
	  if (next_event >= this_command_key_count)
	    error ("%s must be bound to an event with parameters",
494
		   (SYMBOLP (function)
Jim Blandy's avatar
Jim Blandy committed
495
		    ? (char *) XSYMBOL (function)->name->data
496
		    : "command"));
497
	  args[i] = XVECTOR (this_command_keys)->contents[next_event++];
Jim Blandy's avatar
Jim Blandy committed
498
	  varies[i] = -1;
Jim Blandy's avatar
Jim Blandy committed
499 500 501 502 503 504 505

	  /* Find the next parameterized event.  */
	  while (next_event < this_command_key_count
		 && ! (EVENT_HAS_PARAMETERS
		       (XVECTOR (this_command_keys)->contents[next_event])))
	    next_event++;

Jim Blandy's avatar
Jim Blandy committed
506 507
	  break;

Michael I. Bushnell's avatar
Michael I. Bushnell committed
508 509 510
	case 'm':		/* Value of mark.  Does not do I/O.  */
	  check_mark ();
	  /* visargs[i] = Qnil; */
511
	  args[i] = current_buffer->mark;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
512 513 514 515
	  varies[i] = 2;
	  break;

	case 'N':		/* Prefix arg, else number from minibuffer */
Jim Blandy's avatar
Jim Blandy committed
516
	  if (!NILP (prefix_arg))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
517 518 519 520
	    goto have_prefix_arg;
	case 'n':		/* Read number from minibuffer.  */
	  do
	    args[i] = Fread_minibuffer (build_string (prompt), Qnil);
Jim Blandy's avatar
Jim Blandy committed
521
	  while (! NUMBERP (args[i]));
Michael I. Bushnell's avatar
Michael I. Bushnell committed
522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539
	  visargs[i] = last_minibuf_string;
	  break;

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

	case 'p':		/* Prefix arg converted to number.  No I/O. */
	  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 ();
540
	  Fset_marker (point_marker, make_number (PT), Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
541 542 543
	  /* visargs[i+1] = Qnil; */
	  foo = marker_position (current_buffer->mark);
	  /* visargs[i] = Qnil; */
544
	  args[i] = point < foo ? point_marker : current_buffer->mark;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
545
	  varies[i] = 3;
546
	  args[++i] = point > foo ? point_marker : current_buffer->mark;
Michael I. Bushnell's avatar
Michael I. Bushnell committed
547 548 549 550
	  varies[i] = 4;
	  break;

	case 's':		/* String read via minibuffer.  */
551
	  args[i] = Fread_string (build_string (prompt), Qnil, Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
552 553 554
	  break;

	case 'S':		/* Any symbol.  */
555
	  visargs[i] = Fread_string (build_string (prompt), Qnil, Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576
	  /* 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. */
	  args[i] = Fread_variable (build_string (prompt));
	  visargs[i] = last_minibuf_string;
	  break;

	case 'x':		/* Lisp expression read but not evaluated */
	  args[i] = Fread_minibuffer (build_string (prompt), Qnil);
	  visargs[i] = last_minibuf_string;
	  break;

	case 'X':		/* Lisp expression read and evaluated */
	  args[i] = Feval_minibuffer (build_string (prompt), Qnil);
	  visargs[i] = last_minibuf_string;
 	  break;

577 578 579
	  /* 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
580
	default:
581
	  error ("Invalid control letter `%c' (%03o) in interactive calling string",
Michael I. Bushnell's avatar
Michael I. Bushnell committed
582 583 584 585 586 587
		 *tem, *tem);
	}

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

588
      if (NILP (visargs[i]) && STRINGP (args[i]))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
589 590 591 592 593 594
	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
595
  unbind_to (speccount, Qnil);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
596 597 598 599 600

  QUIT;

  args[0] = function;

Jim Blandy's avatar
Jim Blandy committed
601
  if (arg_from_tty || !NILP (record))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
602 603
    {
      visargs[0] = function;
Jim Blandy's avatar
Jim Blandy committed
604
      for (i = 1; i < count + 1; i++)
605 606 607 608 609 610
	{
	  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
611 612 613 614
      Vcommand_history = Fcons (Flist (count + 1, visargs),
				Vcommand_history);
    }

615 616
  /* If we used a marker to hold point, mark, or an end of the region,
     temporarily, convert it to an integer now.  */
617
  for (i = 1; i <= count; i++)
618 619 620
    if (varies[i] >= 1 && varies[i] <= 4)
      XSETINT (args[i], marker_position (args[i]));

621
  single_kboard_state ();
622

Michael I. Bushnell's avatar
Michael I. Bushnell committed
623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642
  {
    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,
  "Return numeric meaning of raw prefix argument ARG.\n\
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
643
  if (NILP (raw))
644
    XSETFASTINT (val, 1);
645
  else if (EQ (raw, Qminus))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
646
    XSETINT (val, -1);
647
  else if (CONSP (raw) && INTEGERP (XCONS (raw)->car))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
648
    XSETINT (val, XINT (XCONS (raw)->car));
649
  else if (INTEGERP (raw))
Michael I. Bushnell's avatar
Michael I. Bushnell committed
650 651
    val = raw;
  else
652
    XSETFASTINT (val, 1);
Michael I. Bushnell's avatar
Michael I. Bushnell committed
653 654 655 656 657 658

  return val;
}

syms_of_callint ()
{
659 660 661
  point_marker = Fmake_marker ();
  staticpro (&point_marker);

662 663 664 665 666 667 668 669 670
  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);

Michael I. Bushnell's avatar
Michael I. Bushnell committed
671 672 673
  Qminus = intern ("-");
  staticpro (&Qminus);

Richard M. Stallman's avatar
Richard M. Stallman committed
674 675 676
  Qplus = intern ("+");
  staticpro (&Qplus);

Michael I. Bushnell's avatar
Michael I. Bushnell committed
677 678 679 680 681 682
  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
683 684 685
  Qenable_recursive_minibuffers = intern ("enable-recursive-minibuffers");
  staticpro (&Qenable_recursive_minibuffers);

686 687 688
  Qmouse_leave_buffer_hook = intern ("mouse-leave-buffer-hook");
  staticpro (&Qmouse_leave_buffer_hook);

689
  DEFVAR_KBOARD ("prefix-arg", Vprefix_arg,
690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707
    "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\").");

  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
708 709 710 711 712 713 714 715 716 717 718
  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;

719
  DEFVAR_LISP ("mark-even-if-inactive", &Vmark_even_if_inactive,
720 721 722 723 724 725 726
    "*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;

727 728 729 730 731 732
  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
733 734 735 736
  defsubr (&Sinteractive);
  defsubr (&Scall_interactively);
  defsubr (&Sprefix_numeric_value);
}