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- /* Call a Lisp function interactively.
- Copyright (C) 1985, 1986, 1992 Free Software Foundation, Inc.
-
- 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
- the Free Software Foundation; either version 1, or (at your option)
- 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. */
-
-
- #include "config.h"
- #include "lisp.h"
- #include "buffer.h"
- #include "commands.h"
- #include "window.h"
-
- extern Lisp_Object global_map;
-
- extern int num_input_chars;
-
- Lisp_Object Vprefix_arg, Vcurrent_prefix_arg, Qminus;
- Lisp_Object Qcall_interactively;
- Lisp_Object Vcommand_history;
-
- extern Lisp_Object ml_apply ();
- extern Lisp_Object Fread_buffer (), Fread_key_sequence (), Fread_file_name ();
-
- /* 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 fun (arg) \"Doc string\" (interactive \"p\") ...use arg...)\n\
- to make arg be the prefix numeric argument when foo is called as a command.\n\
- This 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\
- 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\
- f -- Existing file name.\n\
- F -- Possibly nonexistent file name.\n\
- k -- Key sequence (string).\n\
- m -- Value of mark as number. Does not do I/O.\n\
- n -- Number read using minibuffer.\n\
- N -- Prefix arg converted to number, or if none, do like code `n'.\n\
- 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 first character of the string is '*' then an error is\n\
- signaled if the buffer is read-only.\n\
- This happens before reading any arguments.")
- */
-
- /* 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;
- {
- if (XTYPE (exp) != Lisp_Int && XTYPE (exp) != Lisp_String
- && !NULL (exp) && !EQ (exp, Qt))
- 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 ()
- {
- Lisp_Object tem = Fmarker_buffer (current_buffer->mark);
- if (NULL (tem) || (XBUFFER (tem) != current_buffer))
- error ("The mark is not set now");
- }
-
-
- 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;
-
- Lisp_Object prefix_arg;
- unsigned char *string;
- unsigned char *tem;
- int *varies;
- 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;
- extern char *index ();
-
- /* Save this now, since use ofminibuffer will clobber it. */
- prefix_arg = Vcurrent_prefix_arg;
-
- retry:
-
- for (fun = function;
- XTYPE (fun) == Lisp_Symbol && !EQ (fun, Qunbound);
- fun = XSYMBOL (fun)->function)
- {
- QUIT;
- }
-
- if (XTYPE (fun) == Lisp_Subr)
- {
- string = (unsigned char *) XSUBR (fun)->prompt;
- if (!string)
- {
- lose:
- function = wrong_type_argument (Qcommandp, function, 0);
- goto retry;
- }
- else if ((int) string == 1)
- return call0 (function);
- }
- 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)));
- if (NULL (specs))
- goto lose;
- specs = Fcar (Fcdr (specs));
- if (XTYPE (specs) == Lisp_String)
- {
- /* Make a copy of string so that if a GC relocates specs,
- `string' will still be valid. */
- string = (unsigned char *) alloca (XSTRING (specs)->size + 1);
- bcopy (XSTRING (specs)->data, string, XSTRING (specs)->size + 1);
- }
- else
- {
- i = num_input_chars;
- specs = Feval (specs);
- if (i != num_input_chars || !NULL (record))
- Vcommand_history
- = Fcons (Fcons (function, quotify_args (Fcopy_sequence (specs))),
- Vcommand_history);
- return apply1 (function, specs);
- }
- }
- else if (EQ (funcar, Qmocklisp))
- return ml_apply (fun, Qinteractive);
- else
- goto lose;
-
- /* Here if function specifies a string to control parsing the defaults */
-
- /* First character '*' means barf if buffer read-only */
- if (*string == '*')
- {
- string++;
- if (!NULL (current_buffer->read_only))
- Fbarf_if_buffer_read_only ();
- }
-
- tem = string;
- for (j = 0; *tem; j++)
- {
- 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);
-
- tem = string;
- for (i = 1; *tem; i++)
- {
- 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 *) ""
- : XSTRING (visargs[j])->data;
-
- doprnt (prompt, sizeof prompt, prompt1, j - 1, argstrings + 1);
-
- switch (*tem)
- {
- case 'a': /* Symbol defined as a function */
- visargs[i] = Fcompleting_read (build_string (prompt),
- Vobarray, Qfboundp, Qt, 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))
- args[i] = Fother_buffer (args[i]);
- 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),
- Fother_buffer (Fcurrent_buffer ()), Qnil);
- 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);
- /* 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. */
- XFASTINT (args[i]) = point;
- /* visargs[i] = Qnil; */
- varies[i] = 1;
- break;
-
- case 'D': /* Directory name. */
- args[i] = Fread_file_name (build_string (prompt), Qnil,
- current_buffer->directory, Qlambda);
- break;
-
- case 'f': /* Existing file name. */
- /* On VMS, treat 'f' like 'F', because 'f' fails to work
- for multivalued logical names or for explicit versions. */
- #ifndef VMS
- args[i] = Fread_file_name (build_string (prompt),
- Qnil, Qnil, Qlambda);
- break;
- #endif
-
- case 'F': /* Possibly nonexistent file name. */
- args[i] = Fread_file_name (build_string (prompt),
- Qnil, Qnil, Qnil);
- break;
-
- case 'k': /* Key sequence (string) */
- args[i] = Fread_key_sequence (build_string (prompt));
- teml = args[i];
- visargs[i] = Fkey_description (teml);
- break;
-
- case 'm': /* Value of mark. Does not do I/O. */
- check_mark ();
- /* visargs[i] = Qnil; */
- XFASTINT (args[i]) = marker_position (current_buffer->mark);
- varies[i] = 2;
- break;
-
- case 'N': /* Prefix arg, else number from minibuffer */
- if (!NULL (prefix_arg))
- goto have_prefix_arg;
- case 'n': /* Read number from minibuffer. */
- do
- args[i] = Fread_minibuffer (build_string (prompt), Qnil);
- while (XTYPE (args[i]) != Lisp_Int);
- 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. */
- have_prefix_arg:
- 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 ();
- /* visargs[i+1] = Qnil; */
- foo = marker_position (current_buffer->mark);
- /* visargs[i] = Qnil; */
- XFASTINT (args[i]) = point < foo ? point : foo;
- varies[i] = 3;
- XFASTINT (args[++i]) = point > foo ? point : foo;
- varies[i] = 4;
- break;
-
- case 's': /* String read via minibuffer. */
- args[i] = Fread_string (build_string (prompt), Qnil);
- break;
-
- case 'S': /* Any symbol. */
- visargs[i] = read_minibuf (Vminibuffer_local_ns_map,
- Qnil,
- build_string (prompt),
- 0);
- /* 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;
-
- default:
- error ("Invalid control letter \"%c\" (%03o) in interactive calling string",
- *tem, *tem);
- }
-
- if (varies[i] == 0)
- arg_from_tty = 1;
-
- if (NULL (visargs[i]) && XTYPE (args[i]) == Lisp_String)
- visargs[i] = args[i];
-
- tem = (unsigned char *) index (tem, '\n');
- if (tem) tem++;
- else tem = (unsigned char *) "";
- }
-
- QUIT;
-
- args[0] = function;
-
- if (arg_from_tty || !NULL (record))
- {
- visargs[0] = function;
- for (i = 1; i < count + 1; i++)
- if (varies[i] > 0)
- visargs[i] = Fcons (intern (callint_argfuns[varies[i]]), Qnil);
- else
- visargs[i] = quotify_arg (args[i]);
- Vcommand_history = Fcons (Flist (count + 1, visargs),
- Vcommand_history);
- }
-
- teml = Ffuncall (count + 1, args);
- UNGCPRO;
- return teml;
- }
-
- 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\").")
- (raw)
- Lisp_Object raw;
- {
- Lisp_Object val;
-
- if (NULL (raw))
- XFASTINT (val) = 1;
- else if (XTYPE (raw) == Lisp_Symbol)
- {
- XFASTINT (val) = 0;
- XSETINT (val, -1);
- }
- else if (CONSP (raw))
- val = XCONS (raw)->car;
- else if (XTYPE (raw) == Lisp_Int)
- val = raw;
- else
- XFASTINT (val) = 1;
-
- return val;
- }
-
- syms_of_callint ()
- {
- Qminus = intern ("-");
- staticpro (&Qminus);
-
- Qcall_interactively = intern ("call-interactively");
- staticpro (&Qcall_interactively);
-
- DEFVAR_LISP ("prefix-arg", &Vprefix_arg,
- "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\").");
- Vprefix_arg = Qnil;
-
- 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;
-
- 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;
-
- defsubr (&Sinteractive);
- defsubr (&Scall_interactively);
- defsubr (&Sprefix_numeric_value);
- }
-