Annotation of GNUtools/emacs/src/minibuf.c, revision 1.1

1.1     ! root        1: /* Minibuffer input and completion.
        !             2:    Copyright (C) 1985, 1986, 1990 Free Software Foundation, Inc.
        !             3: 
        !             4: This file is part of GNU Emacs.
        !             5: 
        !             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 1, or (at your option)
        !             9: any later version.
        !            10: 
        !            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.
        !            15: 
        !            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.  */
        !            19: 
        !            20: 
        !            21: #include "config.h"
        !            22: #include "lisp.h"
        !            23: #include "commands.h"
        !            24: #include "buffer.h"
        !            25: #include "window.h"
        !            26: #include "syntax.h"
        !            27: #include "dispextern.h"
        !            28: 
        !            29: #define min(a, b) ((a) < (b) ? (a) : (b))
        !            30: 
        !            31: /* List of buffers for use as minibuffers.
        !            32:   The first element of the list is used for the outermost minibuffer invocation,
        !            33:   the next element is used for a recursive minibuffer invocation, etc.
        !            34:   The list is extended at the end as deeped minibuffer recursions are encountered. */
        !            35: Lisp_Object Vminibuffer_list;
        !            36: 
        !            37: struct minibuf_save_data
        !            38:   {
        !            39:     char *prompt;
        !            40:     int prompt_width;
        !            41:     Lisp_Object help_form;
        !            42:     Lisp_Object current_prefix_arg;
        !            43:   };
        !            44: 
        !            45: int minibuf_save_vector_size;
        !            46: struct minibuf_save_data *minibuf_save_vector;
        !            47: 
        !            48: /* Depth in minibuffer invocations.  */
        !            49: int minibuf_level;
        !            50: 
        !            51: /* Nonzero means display completion help for invalid input.  */
        !            52: int completion_auto_help;
        !            53: 
        !            54: /* Fread_minibuffer leaves the input, as a string, here.  */
        !            55: Lisp_Object last_minibuf_string;
        !            56: 
        !            57: /* Nonzero means let functions called when within a minibuffer 
        !            58:    invoke recursive minibuffers (to read arguments, or whatever).  */
        !            59: int enable_recursive_minibuffers;
        !            60: 
        !            61: /* help-form is bound to this while in the minibuffer.  */
        !            62: Lisp_Object Vminibuffer_help_form;
        !            63: 
        !            64: /* Nonzero means completion ignores case.  */
        !            65: int completion_ignore_case;
        !            66: 
        !            67: Lisp_Object Quser_variable_p;
        !            68: 
        !            69: /* Width in columns of current minibuffer prompt.  */
        !            70: extern int minibuf_prompt_width;
        !            71: 
        !            72: /* Actual minibuffer invocation. */
        !            73: 
        !            74: void read_minibuf_unwind ();
        !            75: Lisp_Object get_minibuffer ();
        !            76: Lisp_Object read_minibuf ();
        !            77: 
        !            78: Lisp_Object
        !            79: read_minibuf (map, initial, prompt, expflag)
        !            80:      Lisp_Object map;
        !            81:      Lisp_Object initial;
        !            82:      Lisp_Object prompt;
        !            83:      int expflag;
        !            84: {
        !            85:   register Lisp_Object val;
        !            86:   int count = specpdl_ptr - specpdl;
        !            87:   struct gcpro gcpro1, gcpro2;
        !            88: 
        !            89:   if (XTYPE (prompt) != Lisp_String)
        !            90:     prompt = build_string ("");
        !            91: 
        !            92:   /* Emacs in -batch mode calls minibuffer: print the prompt.  */
        !            93:   if (noninteractive)
        !            94:     printf ("%s", XSTRING (prompt)->data);
        !            95: 
        !            96:   if (!enable_recursive_minibuffers &&
        !            97:       (EQ (selected_window, minibuf_window)))
        !            98:     error ("Command attempted to use minibuffer while in minibuffer");
        !            99: 
        !           100:   if (minibuf_level == minibuf_save_vector_size)
        !           101:     minibuf_save_vector =
        !           102:      (struct minibuf_save_data *) xrealloc (minibuf_save_vector,
        !           103:                      (minibuf_save_vector_size *= 2) * sizeof (struct minibuf_save_data)); 
        !           104:   minibuf_save_vector[minibuf_level].prompt = minibuf_prompt;
        !           105:   minibuf_save_vector[minibuf_level].prompt_width = minibuf_prompt_width;
        !           106:   minibuf_prompt_width = 0;
        !           107:   /* >> Why is this done this way rather than binding these variables? */
        !           108:   minibuf_save_vector[minibuf_level].help_form = Vhelp_form;
        !           109:   minibuf_save_vector[minibuf_level].current_prefix_arg = Vcurrent_prefix_arg;
        !           110:   GCPRO2 (minibuf_save_vector[minibuf_level].help_form,
        !           111:          minibuf_save_vector[minibuf_level].current_prefix_arg);
        !           112: 
        !           113: 
        !           114:   record_unwind_protect (Fset_window_configuration,
        !           115:                         Fcurrent_window_configuration ());
        !           116: 
        !           117:   val = current_buffer->directory;
        !           118:   Fset_buffer (get_minibuffer (minibuf_level));
        !           119:   current_buffer->directory = val;
        !           120: 
        !           121:   Fset_window_buffer (minibuf_window, Fcurrent_buffer ());
        !           122:   Fselect_window (minibuf_window);
        !           123:   XFASTINT (XWINDOW (minibuf_window)->hscroll) = 0;
        !           124: 
        !           125:   Ferase_buffer ();
        !           126:   minibuf_level++;
        !           127:   record_unwind_protect (read_minibuf_unwind, Qnil);
        !           128:   Vminibuf_scroll_window = Qnil;
        !           129: 
        !           130:   if (!NULL (initial))
        !           131:     Finsert (1, &initial);
        !           132: 
        !           133:   minibuf_prompt = (char *) alloca (XSTRING (prompt)->size + 1);
        !           134:   bcopy (XSTRING (prompt)->data, minibuf_prompt, XSTRING (prompt)->size + 1);
        !           135:   echo_area_contents = 0;
        !           136: 
        !           137:   Vhelp_form = Vminibuffer_help_form;
        !           138:   current_buffer->keymap = map;
        !           139:   recursive_edit_1 ();
        !           140: 
        !           141:   /* If cursor is on the minibuffer line,
        !           142:      show the user we have exited by putting it in column 0.  */
        !           143:   if (cursor_vpos >= XFASTINT (XWINDOW (minibuf_window)->top)
        !           144:       && !noninteractive)
        !           145:     {
        !           146:       cursor_hpos = 0;
        !           147:       update_screen (1, 1);
        !           148:     }
        !           149: 
        !           150:   /* Make minibuffer contents into a string */
        !           151:   val = make_string (BEG_ADDR, Z - BEG);
        !           152:   bcopy (GAP_END_ADDR, XSTRING (val)->data + GPT - BEG, Z - GPT);
        !           153:   unbind_to (count);
        !           154:   UNGCPRO;
        !           155: 
        !           156:   /* VAL is the string of minibuffer text.  */
        !           157: 
        !           158:   last_minibuf_string = val;
        !           159: 
        !           160:   /* If Lisp form desired instead of string, parse it */
        !           161:   if (expflag)
        !           162:     val = Fread (val);
        !           163: 
        !           164:   return val;
        !           165: }
        !           166: 
        !           167: /* Return a buffer to be used as the minibuffer at depth `depth'.
        !           168:  depth = 0 is the lowest allowed argument, and that is the value
        !           169:  used for nonrecursive minibuffer invocations */
        !           170: 
        !           171: Lisp_Object
        !           172: get_minibuffer (depth)
        !           173:      int depth;
        !           174: {
        !           175:   Lisp_Object tail, num, buf;
        !           176:   char name[14];
        !           177:   extern Lisp_Object nconc2 ();
        !           178: 
        !           179:   XFASTINT (num) = depth;
        !           180:   tail = Fnthcdr (num, Vminibuffer_list);
        !           181:   if (NULL (tail))
        !           182:     {
        !           183:       tail = Fcons (Qnil, Qnil);
        !           184:       Vminibuffer_list = nconc2 (Vminibuffer_list, tail);
        !           185:     }
        !           186:   buf = Fcar (tail);
        !           187:   if (NULL (buf) || NULL (XBUFFER (buf)->name))
        !           188:     {
        !           189:       sprintf (name, " *Minibuf-%d*", depth);
        !           190:       buf = Fget_buffer_create (build_string (name));
        !           191:       XCONS (tail)->car = buf;
        !           192:     }
        !           193:   else
        !           194:     reset_buffer (XBUFFER (buf));
        !           195:   return buf;
        !           196: }
        !           197: 
        !           198: /* This function is called on exiting minibuffer, whether normally or not,
        !           199:  and it restores the current window, buffer, etc. */
        !           200: 
        !           201: void
        !           202: read_minibuf_unwind ()
        !           203: {
        !           204:   /* Erase the minibuffer we were using at this level.  */
        !           205:   Fset_buffer (XWINDOW (minibuf_window)->buffer);
        !           206:   /* Prevent error if user has done something strange.  */
        !           207:   current_buffer->read_only = Qnil;
        !           208:   Ferase_buffer ();
        !           209: 
        !           210:   /* If this was a recursive minibuffer,
        !           211:      tie the minibuffer window back to the outer level minibuffer buffer */
        !           212:   minibuf_level--;
        !           213:   /* Make sure minibuffer window is erased, not ignored */
        !           214:   windows_or_buffers_changed++;
        !           215:   XFASTINT (XWINDOW (minibuf_window)->last_modified) = 0;
        !           216: 
        !           217:   /* Restore prompt from outer minibuffer */
        !           218:   minibuf_prompt = minibuf_save_vector[minibuf_level].prompt;
        !           219:   minibuf_prompt_width = minibuf_save_vector[minibuf_level].prompt_width;
        !           220:   Vhelp_form = minibuf_save_vector[minibuf_level].help_form;
        !           221:   Vcurrent_prefix_arg = minibuf_save_vector[minibuf_level].current_prefix_arg;
        !           222: }
        !           223: 
        !           224: DEFUN ("read-from-minibuffer", Fread_from_minibuffer, Sread_from_minibuffer, 1, 4, 0,
        !           225:   "Read a string from the minibuffer, prompting with string PROMPT.\n\
        !           226: If optional second arg INITIAL-CONTENTS is non-nil, it is a string\n\
        !           227:   to be inserted into the minibuffer before reading input.\n\
        !           228: Third arg KEYMAP is a keymap to use whilst reading; the default is\n\
        !           229:   minibuffer-local-map.\n\
        !           230: If fourth arg READ is non-nil, then interpret the result as a lisp object\n\
        !           231:   and return that object  (ie  (car (read-from-string <input-string>)))")
        !           232:   (prompt, initial_input, keymap, read)
        !           233:      Lisp_Object prompt, initial_input, keymap, read;
        !           234: {
        !           235:   CHECK_STRING (prompt, 0);
        !           236:   if (!NULL (initial_input))
        !           237:     CHECK_STRING (initial_input, 1);
        !           238:   if (NULL (keymap))
        !           239:     keymap = Vminibuffer_local_map;
        !           240:   else
        !           241:     keymap = get_keymap (keymap,2);
        !           242:   return read_minibuf (keymap, initial_input, prompt, !NULL(read));
        !           243: }
        !           244: 
        !           245: DEFUN ("read-minibuffer", Fread_minibuffer, Sread_minibuffer, 1, 2, 0,
        !           246:   "Return a Lisp object read using the minibuffer.\n\
        !           247: Prompt with PROMPT.  If non-nil, optional second arg INITIAL-CONTENTS\n\
        !           248: is a string to insert in the minibuffer before reading.")
        !           249:   (prompt, initial_contents)
        !           250:      Lisp_Object prompt, initial_contents;
        !           251: {
        !           252:   CHECK_STRING (prompt, 0);
        !           253:   if (!NULL (initial_contents))
        !           254:     CHECK_STRING (initial_contents, 1)
        !           255:   return read_minibuf (Vminibuffer_local_map, initial_contents, prompt, 1);
        !           256: }
        !           257: 
        !           258: DEFUN ("eval-minibuffer", Feval_minibuffer, Seval_minibuffer, 1, 2, 0,
        !           259:   "Return value of Lisp expression read using the minibuffer.\n\
        !           260: Prompt with PROMPT.  If non-nil, optional second arg INITIAL-CONTENTS\n\
        !           261: is a string to insert in the minibuffer before reading.")
        !           262:   (prompt, initial_contents)
        !           263:      Lisp_Object prompt, initial_contents;
        !           264: {
        !           265:   return Feval (Fread_minibuffer (prompt, initial_contents));
        !           266: }
        !           267: 
        !           268: /* Functions that use the minibuffer to read various things. */
        !           269: 
        !           270: DEFUN ("read-string", Fread_string, Sread_string, 1, 2, 0,
        !           271:   "Read a string from the minibuffer, prompting with string PROMPT.\n\
        !           272: If non-nil second arg INITIAL-INPUT is a string to insert before reading.")
        !           273:   (prompt, initial_input)
        !           274:      Lisp_Object prompt, initial_input;
        !           275: {
        !           276:   return Fread_from_minibuffer (prompt, initial_input, Qnil, Qnil);
        !           277: }
        !           278: 
        !           279: DEFUN ("read-no-blanks-input", Fread_no_blanks_input, Sread_no_blanks_input, 2, 2, 0,
        !           280:   "Args PROMPT and INIT, strings.  Read a string from the terminal, not allowing blanks.\n\
        !           281: Prompt with PROMPT, and provide INIT as an initial value of the input string.")
        !           282:   (prompt, init)
        !           283:      Lisp_Object prompt, init;
        !           284: {
        !           285:   CHECK_STRING (prompt, 0);
        !           286:   CHECK_STRING (init, 1);
        !           287: 
        !           288:   return read_minibuf (Vminibuffer_local_ns_map, init, prompt, 0);
        !           289: }
        !           290: 
        !           291: DEFUN ("read-command", Fread_command, Sread_command, 1, 1, 0,
        !           292:   "One arg PROMPT, a string.  Read the name of a command and return as a symbol.\n\
        !           293: Prompts with PROMPT.")
        !           294:   (prompt)
        !           295:      Lisp_Object prompt;
        !           296: {
        !           297:   return Fintern (Fcompleting_read (prompt, Vobarray, Qcommandp, Qt, Qnil),
        !           298:                  Qnil);
        !           299: }
        !           300: 
        !           301: #ifdef NOTDEF
        !           302: DEFUN ("read-function", Fread_function, Sread_function, 1, 1, 0,
        !           303:   "One arg PROMPT, a string.  Read the name of a function and return as a symbol.\n\
        !           304: Prompts with PROMPT.")
        !           305:   (prompt)
        !           306:      Lisp_Object prompt;
        !           307: {
        !           308:   return Fintern (Fcompleting_read (prompt, Vobarray, Qfboundp, Qt, Qnil),
        !           309:                  Qnil);
        !           310: }
        !           311: #endif /* NOTDEF */
        !           312: 
        !           313: DEFUN ("read-variable", Fread_variable, Sread_variable, 1, 1, 0,
        !           314:   "One arg PROMPT, a string.  Read the name of a user variable and return\n\
        !           315: it as a symbol.  Prompts with PROMPT.\n\
        !           316: A user variable is one whose documentation starts with a \"*\" character.")
        !           317:   (prompt)
        !           318:      Lisp_Object prompt;
        !           319: {
        !           320:   return Fintern (Fcompleting_read (prompt, Vobarray,
        !           321:                                    Quser_variable_p, Qt, Qnil),
        !           322:                  Qnil);
        !           323: }
        !           324: 
        !           325: DEFUN ("read-buffer", Fread_buffer, Sread_buffer, 1, 3, 0,
        !           326:   "One arg PROMPT, a string.  Read the name of a buffer and return as a string.\n\
        !           327: Prompts with PROMPT.\n\
        !           328: Optional second arg is value to return if user enters an empty line.\n\
        !           329: If optional third arg REQUIRE-MATCH is non-nil, only existing buffer names are allowed.")
        !           330:   (prompt, def, require_match)
        !           331:      Lisp_Object prompt, def, require_match;
        !           332: {
        !           333:   Lisp_Object tem;
        !           334:   Lisp_Object args[3];
        !           335:   struct gcpro gcpro1;
        !           336: 
        !           337:   if (XTYPE (def) == Lisp_Buffer)
        !           338:     def = XBUFFER (def)->name;
        !           339:   if (!NULL (def))
        !           340:     {
        !           341:       args[0] = build_string ("%s(default %s) ");
        !           342:       args[1] = prompt;
        !           343:       args[2] = def;
        !           344:       prompt = Fformat (3, args);
        !           345:     }
        !           346:   GCPRO1 (def);
        !           347:   tem = Fcompleting_read (prompt, Vbuffer_alist, Qnil, require_match, Qnil);
        !           348:   UNGCPRO;
        !           349:   if (XSTRING (tem)->size)
        !           350:     return tem;
        !           351:   return def;
        !           352: }
        !           353: 
        !           354: DEFUN ("try-completion", Ftry_completion, Stry_completion, 2, 3, 0,
        !           355:   "Return common substring of all completions of STRING in ALIST.\n\
        !           356: Each car of each element of ALIST is tested to see if it begins with STRING.\n\
        !           357: All that match are compared together; the longest initial sequence\n\
        !           358: common to all matches is returned as a string.\n\
        !           359: If there is no match at all, nil is returned.\n\
        !           360: For an exact match, t is returned.\n\
        !           361: \n\
        !           362: ALIST can be an obarray instead of an alist.\n\
        !           363: Then the print names of all symbols in the obarray are the possible matches.\n\
        !           364: \n\
        !           365: If optional third argument PREDICATE is non-nil,\n\
        !           366: it is used to test each possible match.\n\
        !           367: The match is a candidate only if PREDICATE returns non-nil.\n\
        !           368: The argument given to PREDICATE is the alist element or the symbol from the obarray.")
        !           369:   (string, alist, pred)
        !           370:      Lisp_Object string, alist, pred;
        !           371: {
        !           372:   Lisp_Object bestmatch, tail, elt, eltstring;
        !           373:   int bestmatchsize;
        !           374:   int compare, matchsize;
        !           375:   int list = CONSP (alist) || NULL (alist);
        !           376:   int index, obsize;
        !           377:   int matchcount = 0;
        !           378:   Lisp_Object bucket, zero, end, tem;
        !           379:   struct gcpro gcpro1, gcpro2, gcpro3;
        !           380: 
        !           381:   CHECK_STRING (string, 0);
        !           382:   if (!list && XTYPE (alist) != Lisp_Vector)
        !           383:     return call3 (alist, string, pred, Qnil);
        !           384: 
        !           385:   bestmatch = Qnil;
        !           386: 
        !           387:   if (list)
        !           388:     tail = alist;
        !           389:   else
        !           390:     {
        !           391:       index = 0;
        !           392:       obsize = XVECTOR (alist)->size;
        !           393:       bucket = XVECTOR (alist)->contents[index];
        !           394:     }
        !           395: 
        !           396:   while (1)
        !           397:     {
        !           398:       /* Get the next element of the alist or obarray. */
        !           399:       /* Exit the loop if the elements are all used up. */
        !           400:       /* elt gets the alist element or symbol.
        !           401:         eltstring gets the name to check as a completion. */
        !           402: 
        !           403:       if (list)
        !           404:        {
        !           405:          if (NULL (tail))
        !           406:            break;
        !           407:          elt = Fcar (tail);
        !           408:          eltstring = Fcar (elt);
        !           409:          tail = Fcdr (tail);
        !           410:        }
        !           411:       else
        !           412:        {
        !           413:          if (XFASTINT (bucket) != 0)
        !           414:            {
        !           415:              elt = bucket;
        !           416:              eltstring = Fsymbol_name (elt);
        !           417:              if (XSYMBOL (bucket)->next)
        !           418:                XSETSYMBOL (bucket, XSYMBOL (bucket)->next);
        !           419:              else
        !           420:                XFASTINT (bucket) = 0;
        !           421:            }
        !           422:          else if (++index >= obsize)
        !           423:            break;
        !           424:          else
        !           425:            {
        !           426:              bucket = XVECTOR (alist)->contents[index];
        !           427:              continue;
        !           428:            }
        !           429:        }
        !           430: 
        !           431:       /* Is this element a possible completion? */
        !           432: 
        !           433:       if (XTYPE (eltstring) == Lisp_String &&
        !           434:          XSTRING (string)->size <= XSTRING (eltstring)->size &&
        !           435:          0 > scmp (XSTRING (eltstring)->data, XSTRING (string)->data,
        !           436:                    XSTRING (string)->size))
        !           437:        {
        !           438:          /* Yes. */
        !           439:          /* Ignore this element if there is a predicate
        !           440:             and the predicate doesn't like it. */
        !           441: 
        !           442:          if (!NULL (pred))
        !           443:            {
        !           444:              if (EQ (pred, Qcommandp))
        !           445:                tem = Fcommandp (elt);
        !           446:              else
        !           447:                {
        !           448:                  GCPRO3 (string, eltstring, bestmatch);
        !           449:                  tem = call1 (pred, elt);
        !           450:                  UNGCPRO;
        !           451:                }
        !           452:              if (NULL (tem)) continue;
        !           453:            }
        !           454: 
        !           455:          /* Update computation of how much all possible completions match */
        !           456: 
        !           457:          matchcount++;
        !           458:          if (NULL (bestmatch))
        !           459:            bestmatch = eltstring, bestmatchsize = XSTRING (eltstring)->size;
        !           460:          else
        !           461:            {
        !           462:              compare = min (bestmatchsize, XSTRING (eltstring)->size);
        !           463:              matchsize = scmp (XSTRING (bestmatch)->data,
        !           464:                                XSTRING (eltstring)->data,
        !           465:                                compare);
        !           466:              if (matchsize < 0)
        !           467:                matchsize = compare;
        !           468:              if (completion_ignore_case)
        !           469:                {
        !           470:                  /* If this is an exact match except for case,
        !           471:                     use it as the best match rather than one that is not an
        !           472:                     exact match.  This way, we get the case pattern
        !           473:                     of the actual match.  */
        !           474:                  if ((matchsize == XSTRING (eltstring)->size
        !           475:                       && matchsize < XSTRING (bestmatch)->size)
        !           476:                      ||
        !           477:                      /* If there is no exact match ignoring case,
        !           478:                         prefer a match that does not change the case
        !           479:                         of the input.  */
        !           480:                      (((matchsize == XSTRING (eltstring)->size)
        !           481:                        ==
        !           482:                        (matchsize == XSTRING (bestmatch)->size))
        !           483:                       /* If there is more than one exact match ignoring case,
        !           484:                          and one of them is exact including case,
        !           485:                          prefer that one.  */
        !           486:                       && !bcmp (XSTRING (eltstring)->data,
        !           487:                                 XSTRING (string)->data,
        !           488:                                 XSTRING (string)->size)
        !           489:                       && bcmp (XSTRING (bestmatch)->data,
        !           490:                                XSTRING (string)->data,
        !           491:                                XSTRING (string)->size)))
        !           492:                    bestmatch = eltstring;
        !           493:                }
        !           494:              bestmatchsize = matchsize;
        !           495:            }
        !           496:        }
        !           497:     }
        !           498: 
        !           499:   if (NULL (bestmatch))
        !           500:     return Qnil;               /* No completions found */
        !           501:   /* If we are ignoring case, and there is no exact match,
        !           502:      and no additional text was supplied,
        !           503:      don't change the case of what the user typed.  */
        !           504:   if (completion_ignore_case && bestmatchsize == XSTRING (string)->size
        !           505:       && XSTRING (bestmatch)->size > bestmatchsize)
        !           506:     return string;
        !           507: 
        !           508:   /* Return t if the supplied string is an exact match (counting case);
        !           509:      it does not require any change to be made.  */
        !           510:   if (matchcount == 1 && bestmatchsize == XSTRING (string)->size
        !           511:       && !bcmp (XSTRING (bestmatch)->data, XSTRING (string)->data,
        !           512:                bestmatchsize))
        !           513:     return Qt;
        !           514: 
        !           515:   XFASTINT (zero) = 0;         /* Else extract the part in which */
        !           516:   XFASTINT (end) = bestmatchsize;           /* all completions agree */
        !           517:   return Fsubstring (bestmatch, zero, end);
        !           518: }
        !           519: 
        !           520: /* Compare exactly LEN chars of strings at S1 and S2,
        !           521:    ignoring case if appropriate.
        !           522:    Return -1 if strings match,
        !           523:    else number of chars that match at the beginning.  */
        !           524: 
        !           525: scmp (s1, s2, len)
        !           526:      register char *s1, *s2;
        !           527:      int len;
        !           528: {
        !           529:   register int l = len;
        !           530: 
        !           531:   if (completion_ignore_case)
        !           532:     {
        !           533:       while (l && downcase_table[*s1++] == downcase_table[*s2++])
        !           534:        l--;
        !           535:     }
        !           536:   else
        !           537:     {
        !           538:       while (l && *s1++ == *s2++)
        !           539:        l--;
        !           540:     }
        !           541:   if (l == 0)
        !           542:     return -1;
        !           543:   else return len - l;
        !           544: }
        !           545: 
        !           546: DEFUN ("all-completions", Fall_completions, Sall_completions, 2, 3, 0,
        !           547:   "Search for partial matches to STRING in ALIST.\n\
        !           548: Each car of each element of ALIST is tested to see if it begins with STRING.\n\
        !           549: The value is a list of all the strings from ALIST that match.\n\
        !           550: ALIST can be an obarray instead of an alist.\n\
        !           551: Then the print names of all symbols in the obarray are the possible matches.\n\
        !           552: \n\
        !           553: If optional third argument PREDICATE is non-nil,\n\
        !           554: it is used to test each possible match.\n\
        !           555: The match is a candidate only if PREDICATE returns non-nil.\n\
        !           556: The argument given to PREDICATE is the alist element or the symbol from the obarray.")
        !           557:   (string, alist, pred)
        !           558:      Lisp_Object string, alist, pred;
        !           559: {
        !           560:   Lisp_Object tail, elt, eltstring;
        !           561:   Lisp_Object allmatches;
        !           562:   int list = CONSP (alist) || NULL (alist);
        !           563:   int index, obsize;
        !           564:   Lisp_Object bucket, tem;
        !           565:   struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
        !           566: 
        !           567:   CHECK_STRING (string, 0);
        !           568:   if (!list && XTYPE (alist) != Lisp_Vector)
        !           569:     {
        !           570:       return call3 (alist, string, pred, Qt);
        !           571:     }
        !           572:   allmatches = Qnil;
        !           573: 
        !           574:   /* If ALIST is not a list, set TAIL just for gc pro.  */
        !           575:   tail = alist;
        !           576:   if (! list)
        !           577:     {
        !           578:       index = 0;
        !           579:       obsize = XVECTOR (alist)->size;
        !           580:       bucket = XVECTOR (alist)->contents[index];
        !           581:     }
        !           582: 
        !           583:   while (1)
        !           584:     {
        !           585:       /* Get the next element of the alist or obarray. */
        !           586:       /* Exit the loop if the elements are all used up. */
        !           587:       /* elt gets the alist element or symbol.
        !           588:         eltstring gets the name to check as a completion. */
        !           589: 
        !           590:       if (list)
        !           591:        {
        !           592:          if (NULL (tail))
        !           593:            break;
        !           594:          elt = Fcar (tail);
        !           595:          eltstring = Fcar (elt);
        !           596:          tail = Fcdr (tail);
        !           597:        }
        !           598:       else
        !           599:        {
        !           600:          if (XFASTINT (bucket) != 0)
        !           601:            {
        !           602:              elt = bucket;
        !           603:              eltstring = Fsymbol_name (elt);
        !           604:              if (XSYMBOL (bucket)->next)
        !           605:                XSETSYMBOL (bucket, XSYMBOL (bucket)->next);
        !           606:              else
        !           607:                XFASTINT (bucket) = 0;
        !           608:            }
        !           609:          else if (++index >= obsize)
        !           610:            break;
        !           611:          else
        !           612:            {
        !           613:              bucket = XVECTOR (alist)->contents[index];
        !           614:              continue;
        !           615:            }
        !           616:        }
        !           617: 
        !           618:       /* Is this element a possible completion? */
        !           619: 
        !           620:       if (XTYPE (eltstring) == Lisp_String &&
        !           621:          XSTRING (string)->size <= XSTRING (eltstring)->size &&
        !           622:          XSTRING (eltstring)->data[0] != ' ' &&
        !           623:          0 > scmp (XSTRING (eltstring)->data, XSTRING (string)->data,
        !           624:                    XSTRING (string)->size))
        !           625:        {
        !           626:          /* Yes. */
        !           627:          /* Ignore this element if there is a predicate
        !           628:             and the predicate doesn't like it. */
        !           629: 
        !           630:          if (!NULL (pred))
        !           631:            {
        !           632:              if (EQ (pred, Qcommandp))
        !           633:                tem = Fcommandp (elt);
        !           634:              else
        !           635:                {
        !           636:                  GCPRO4 (tail, eltstring, allmatches, string);
        !           637:                  tem = call1 (pred, elt);
        !           638:                  UNGCPRO;
        !           639:                }
        !           640:              if (NULL (tem)) continue;
        !           641:            }
        !           642:          /* Ok => put it on the list. */
        !           643:          allmatches = Fcons (eltstring, allmatches);
        !           644:        }
        !           645:     }
        !           646: 
        !           647:   return Fnreverse (allmatches);
        !           648: }
        !           649: 
        !           650: Lisp_Object Vminibuffer_completion_table, Qminibuffer_completion_table;
        !           651: Lisp_Object Vminibuffer_completion_predicate, Qminibuffer_completion_predicate;
        !           652: Lisp_Object Vminibuffer_completion_confirm, Qminibuffer_completion_confirm;
        !           653: 
        !           654: DEFUN ("completing-read", Fcompleting_read, Scompleting_read, 2, 5, 0,
        !           655:   "Read a string in the minibuffer, with completion.\n\
        !           656: Args are PROMPT, TABLE, PREDICATE, REQUIRE-MATCH and INITIAL-INPUT.\n\
        !           657: PROMPT is a string to prompt with; normally it ends in a colon and a space.\n\
        !           658: TABLE is an alist whose elements' cars are strings, or an obarray (see try-completion).\n\
        !           659: PREDICATE limits completion to a subset of TABLE; see try-completion for details.\n\
        !           660: If REQUIRE-MATCH is non-nil, the user is not allowed to exit unless\n\
        !           661:  the input is (or completes to) an element of TABLE.\n\
        !           662:  If it is also not t, Return does not exit if it does non-null completion.\n\
        !           663: If INITIAL-INPUT is non-nil, insert it in the minibuffer initially.\n\
        !           664: Case is ignored if ambient value of  completion-ignore-case  is non-nil.")
        !           665:   (prompt, table, pred, require_match, init)
        !           666:      Lisp_Object prompt, table, pred, require_match, init;
        !           667: {
        !           668:   Lisp_Object val;
        !           669:   int count = specpdl_ptr - specpdl;
        !           670:   specbind (Qminibuffer_completion_table, table);
        !           671:   specbind (Qminibuffer_completion_predicate, pred);
        !           672:   specbind (Qminibuffer_completion_confirm,
        !           673:            EQ (require_match, Qt) ? Qnil : Qt);
        !           674:   val = read_minibuf (NULL (require_match)
        !           675:                      ? Vminibuffer_local_completion_map
        !           676:                      : Vminibuffer_local_must_match_map,
        !           677:                      init, prompt, 0);
        !           678:   unbind_to (count);
        !           679:   return val;
        !           680: }
        !           681: 
        !           682: temp_echo_area_contents (m)
        !           683:      char *m;
        !           684: {
        !           685:   int osize = ZV;
        !           686:   Lisp_Object oinhibit;
        !           687:   oinhibit = Vinhibit_quit;
        !           688: 
        !           689:   SET_PT (osize);
        !           690:   InsStr (m);
        !           691:   SET_PT (osize);
        !           692:   Vinhibit_quit = Qt;
        !           693:   Fsit_for (make_number (2), Qnil);
        !           694:   del_range (point, ZV);
        !           695:   if (!NULL (Vquit_flag))
        !           696:     {
        !           697:       Vquit_flag = Qnil;
        !           698:       unread_command_char = quit_char;
        !           699:     }
        !           700:   Vinhibit_quit = oinhibit;
        !           701: }
        !           702: 
        !           703: Lisp_Object Fminibuffer_completion_help ();
        !           704: Lisp_Object assoc_for_completion ();
        !           705: 
        !           706: /* returns:
        !           707:  * 0 no possible completion
        !           708:  * 1 was already an exact and unique completion
        !           709:  * 3 was already an exact completion
        !           710:  * 4 completed to an exact completion
        !           711:  * 5 some completion happened
        !           712:  * 6 no completion happened
        !           713:  */
        !           714: int
        !           715: do_completion ()
        !           716: {
        !           717:   Lisp_Object completion, tem;
        !           718:   int completedp;
        !           719: 
        !           720:   completion = Ftry_completion (Fbuffer_string (), Vminibuffer_completion_table,
        !           721:                                Vminibuffer_completion_predicate);
        !           722:   if (NULL (completion))
        !           723:     {
        !           724:       bell ();
        !           725:       /* Clearing this prevents sit-for from leaving the message up.  */
        !           726:       prev_echo_area_contents = 0;
        !           727:       temp_echo_area_contents (" [No match]");
        !           728:       return 0;
        !           729:     }
        !           730: 
        !           731:   if (EQ (completion, Qt))     /* exact and unique match */
        !           732:     return 1;
        !           733: 
        !           734:   /* compiler bug */
        !           735:   tem = Fstring_equal (completion, Fbuffer_string());
        !           736:   if (completedp = NULL (tem))
        !           737:     {
        !           738:       Ferase_buffer ();                /* Some completion happened */
        !           739:       Finsert (1, &completion);
        !           740:     }
        !           741: 
        !           742:   /* It did find a match.  Do we match some possibility exactly now? */
        !           743:   if (CONSP (Vminibuffer_completion_table)
        !           744:       || NULL (Vminibuffer_completion_table))
        !           745:     tem = assoc_for_completion (Fbuffer_string (), Vminibuffer_completion_table);
        !           746:   else if (XTYPE (Vminibuffer_completion_table) == Lisp_Vector)
        !           747:     {
        !           748:       /* the primitive used by Fintern_soft */
        !           749:       extern Lisp_Object oblookup ();
        !           750: 
        !           751:       tem = Fbuffer_string ();
        !           752:       /* Bypass intern-soft as that loses for nil */
        !           753:       tem = oblookup (Vminibuffer_completion_table,
        !           754:                      XSTRING (tem)->data, XSTRING (tem)->size);
        !           755:       if (XTYPE (tem) != Lisp_Symbol)
        !           756:        tem = Qnil;
        !           757:       else if (!NULL (Vminibuffer_completion_predicate))
        !           758:        tem = call1 (Vminibuffer_completion_predicate, tem);
        !           759:       else
        !           760:        tem = Qt;
        !           761:     }
        !           762:   else
        !           763:     tem = call3 (Vminibuffer_completion_table,
        !           764:                 Fbuffer_string (),
        !           765:                 Vminibuffer_completion_predicate,
        !           766:                 Qlambda);
        !           767: 
        !           768:   if (NULL (tem))
        !           769:     { /* not an exact match */
        !           770:       if (completedp)
        !           771:        return 5;
        !           772:       else if (completion_auto_help)
        !           773:        Fminibuffer_completion_help ();
        !           774:       else
        !           775:        temp_echo_area_contents (" [Next char not unique]");
        !           776:       return 6;
        !           777:     }
        !           778:   else
        !           779:     return (completedp ? 4 : 3);
        !           780: }
        !           781: 
        !           782: /* Like assoc but assumes KEY is a string, and ignores case if appropriate.  */
        !           783: 
        !           784: Lisp_Object
        !           785: assoc_for_completion (key, list)
        !           786:      register Lisp_Object key;
        !           787:      Lisp_Object list;
        !           788: {
        !           789:   register Lisp_Object tail;
        !           790: 
        !           791:   if (completion_ignore_case)
        !           792:     key = Fupcase (key);
        !           793: 
        !           794:   for (tail = list; !NULL (tail); tail = Fcdr (tail))
        !           795:     {
        !           796:       register Lisp_Object elt, tem, thiscar;
        !           797:       elt = Fcar (tail);
        !           798:       if (!CONSP (elt)) continue;
        !           799:       thiscar = Fcar (elt);
        !           800:       if (XTYPE (thiscar) != Lisp_String)
        !           801:        continue;
        !           802:       if (completion_ignore_case)
        !           803:        thiscar = Fupcase (thiscar);
        !           804:       tem = Fequal (thiscar, key);
        !           805:       if (!NULL (tem)) return elt;
        !           806:       QUIT;
        !           807:     }
        !           808:   return Qnil;
        !           809: }
        !           810: 
        !           811: DEFUN ("minibuffer-complete", Fminibuffer_complete, Sminibuffer_complete, 0, 0, "",
        !           812:   "Complete the minibuffer contents as far as possible.")
        !           813:   ()
        !           814: {
        !           815:   register int i = do_completion ();
        !           816:   switch (i)
        !           817:     {
        !           818:     case 0:
        !           819:       return Qnil;
        !           820: 
        !           821:     case 1:
        !           822:       temp_echo_area_contents(" [Sole completion]");
        !           823:       break;
        !           824: 
        !           825:     case 3:
        !           826:       temp_echo_area_contents(" [Complete, but not unique]");
        !           827:       break;
        !           828:     }
        !           829:   return Qt;
        !           830: }
        !           831: 
        !           832: DEFUN ("minibuffer-complete-and-exit", Fminibuffer_complete_and_exit,
        !           833:         Sminibuffer_complete_and_exit, 0, 0, "",
        !           834:   "Complete the minibuffer contents, and maybe exit.\n\
        !           835: Exit if the name is valid with no completion needed.\n\
        !           836: If name was completed to a valid match,\n\
        !           837: a repetition of this command will exit.")
        !           838:   ()
        !           839: {
        !           840:   register int i;
        !           841: 
        !           842:   /* Allow user to specify null string */
        !           843:   if (BEGV == ZV)
        !           844:     goto exit;
        !           845: 
        !           846:   i = do_completion ();
        !           847:   switch (i)
        !           848:     {
        !           849:     case 1:
        !           850:     case 3:
        !           851:       goto exit;
        !           852: 
        !           853:     case 4:
        !           854:       if (!NULL (Vminibuffer_completion_confirm))
        !           855:        {
        !           856:          temp_echo_area_contents(" [Confirm]");
        !           857:          return Qnil;
        !           858:        }
        !           859:       else
        !           860:        goto exit;
        !           861: 
        !           862:     default:
        !           863:       return Qnil;
        !           864:     }
        !           865:  exit:
        !           866:   Fthrow (Qexit, Qnil);
        !           867:   /* NOTREACHED */
        !           868: }
        !           869: 
        !           870: DEFUN ("minibuffer-complete-word", Fminibuffer_complete_word, Sminibuffer_complete_word,
        !           871:   0, 0, "",
        !           872:   "Complete the minibuffer contents at most a single word.")
        !           873:   ()
        !           874: {
        !           875:   Lisp_Object completion, tem;
        !           876:   register int i;
        !           877:   register unsigned char *completion_string;
        !           878:   /* We keep calling Fbuffer_string
        !           879:      rather than arrange for GC to hold onto a pointer to
        !           880:      one of the strings thus made.  */
        !           881: 
        !           882:   completion = Ftry_completion (Fbuffer_string (),
        !           883:                                Vminibuffer_completion_table,
        !           884:                                Vminibuffer_completion_predicate);
        !           885:   if (NULL (completion))
        !           886:     {
        !           887:       bell ();
        !           888:       temp_echo_area_contents (" [No match]");
        !           889:       return Qnil;
        !           890:     }
        !           891:   if (EQ (completion, Qt))
        !           892:     return Qnil;
        !           893: 
        !           894: #if 0 /* How the below code used to look, for reference */
        !           895:   tem = Fbuffer_string ();
        !           896:   b = XSTRING (tem)->data;
        !           897:   i = ZV - 1 - XSTRING (completion)->size;
        !           898:   p = XSTRING (completion)->data;
        !           899:   if (i > 0 ||
        !           900:       0 <= scmp (b, p, ZV - 1))
        !           901:     {
        !           902:       i = 1;
        !           903:       /* Set buffer to longest match of buffer tail and completion head. */
        !           904:       while (0 <= scmp (b + i, p, ZV - 1 - i))
        !           905:        i++;
        !           906:       del_range (1, i + 1);
        !           907:       SET_PT (ZV);
        !           908:     }
        !           909: #else /* Rewritten code */
        !           910:   {
        !           911:     register unsigned char *buffer_string;
        !           912:     int buffer_length, completion_length;
        !           913: 
        !           914:     tem = Fbuffer_string ();
        !           915:     buffer_string = XSTRING (tem)->data;
        !           916:     completion_string = XSTRING (completion)->data;
        !           917:     buffer_length = XSTRING (tem)->size; /* ie ZV - BEGV */
        !           918:     completion_length = XSTRING (completion)->size;
        !           919:     i = buffer_length - completion_length;
        !           920:     /* Mly: I don't understand what this is supposed to do AT ALL */
        !           921:     if (i > 0 ||
        !           922:        0 <= scmp (buffer_string, completion_string, buffer_length))
        !           923:       {
        !           924:        /* Set buffer to longest match of buffer tail and completion head. */
        !           925:        if (i <= 0) i = 1;
        !           926:        buffer_string += i;
        !           927:        buffer_length -= i;
        !           928:        while (0 <= scmp (buffer_string++, completion_string, buffer_length--))
        !           929:          i++;
        !           930:        del_range (1, i + 1);
        !           931:        SET_PT (ZV);
        !           932:       }
        !           933:   }
        !           934: #endif /* Rewritten code */
        !           935:   i = ZV - BEGV;
        !           936: 
        !           937:   /* If completion finds next char not unique,
        !           938:      consider adding a space or a hyphen */
        !           939:   if (i == XSTRING (completion)->size)
        !           940:     {
        !           941:       tem = Ftry_completion (concat2 (Fbuffer_string (), build_string (" ")),
        !           942:                             Vminibuffer_completion_table,
        !           943:                             Vminibuffer_completion_predicate);
        !           944:       if (XTYPE (tem) == Lisp_String)
        !           945:        completion = tem;
        !           946:       else
        !           947:        {
        !           948:          tem = Ftry_completion (concat2 (Fbuffer_string (), build_string ("-")),
        !           949:                                 Vminibuffer_completion_table,
        !           950:                                 Vminibuffer_completion_predicate);
        !           951:          if (XTYPE (tem) == Lisp_String)
        !           952:            completion = tem;
        !           953:        }
        !           954:     }      
        !           955: 
        !           956:   /* Now find first word-break in the stuff found by completion.
        !           957:      i gets index in string of where to stop completing.  */
        !           958:   completion_string = XSTRING (completion)->data;
        !           959: 
        !           960:   for (; i < XSTRING (completion)->size; i++)
        !           961:     if (SYNTAX (completion_string[i]) != Sword) break;
        !           962:   if (i < XSTRING (completion)->size)
        !           963:     i = i + 1;
        !           964: 
        !           965:   /* If got no characters, print help for user.  */
        !           966: 
        !           967:   if (i == ZV - BEGV)
        !           968:     {
        !           969:       if (completion_auto_help)
        !           970:        Fminibuffer_completion_help ();
        !           971:       return Qnil;
        !           972:     }
        !           973: 
        !           974:   /* Otherwise insert in minibuffer the chars we got */
        !           975: 
        !           976:   Ferase_buffer ();
        !           977:   insert (completion_string, i);
        !           978:   return Qt;
        !           979: }
        !           980: 
        !           981: DEFUN ("display-completion-list", Fdisplay_completion_list, Sdisplay_completion_list,
        !           982:        1, 1, 0,
        !           983:   "Display in a buffer the list of completions, COMPLETIONS.\n\
        !           984: Each element may be just a symbol or string\n\
        !           985: or may be a list of two strings to be printed as if concatenated.")
        !           986:   (completions)
        !           987:      Lisp_Object completions;
        !           988: {
        !           989:   register Lisp_Object tail, elt;
        !           990:   register int i;
        !           991:   struct buffer *old = current_buffer;
        !           992:   /* No GCPRO needed, since (when it matters) every variable
        !           993:      points to a non-string that is pointed to by COMPLETIONS.  */
        !           994: 
        !           995:   set_buffer_internal (XBUFFER (Vstandard_output));
        !           996: 
        !           997:   if (NULL (completions))
        !           998:     InsStr ("There are no possible completions of what you have typed.");
        !           999:   else
        !          1000:     {
        !          1001:       InsStr ("Possible completions are:");
        !          1002:       for (tail = completions, i = 0; !NULL (tail); tail = Fcdr (tail), i++)
        !          1003:        {
        !          1004:          /* this needs fixing for the case of long completions
        !          1005:             and/or narrow windows */
        !          1006:          /* Sadly, the window it will appear in is not known
        !          1007:             until after the text has been made. */
        !          1008:          if (i & 1)
        !          1009:            Findent_to (make_number (35), make_number (1));
        !          1010:          else
        !          1011:            Fterpri (Qnil);
        !          1012:          elt = Fcar (tail);
        !          1013:          if (CONSP (elt))
        !          1014:            {
        !          1015:              Fprinc (Fcar (elt), Qnil);
        !          1016:              Fprinc (Fcar (Fcdr (elt)), Qnil);
        !          1017:            }
        !          1018:          else
        !          1019:            Fprinc (elt, Qnil);
        !          1020:        }
        !          1021:     }
        !          1022:   set_buffer_internal (old);
        !          1023:   return Qnil;
        !          1024: }
        !          1025: 
        !          1026: DEFUN ("minibuffer-completion-help", Fminibuffer_completion_help, Sminibuffer_completion_help,
        !          1027:   0, 0, "",
        !          1028:   "Display a list of possible completions of the current minibuffer contents.")
        !          1029:   ()
        !          1030: {
        !          1031:   Lisp_Object completions;
        !          1032:   message ("Making completion list...");
        !          1033:   completions = Fall_completions (Fbuffer_string (), Vminibuffer_completion_table,
        !          1034:                                  Vminibuffer_completion_predicate);
        !          1035:   echo_area_contents = 0;
        !          1036:   if (NULL (completions))
        !          1037:     {
        !          1038:       bell ();
        !          1039:       temp_echo_area_contents (" [No completions]");
        !          1040:     }
        !          1041:   else
        !          1042:     internal_with_output_to_temp_buffer (" *Completions*",
        !          1043:                                         Fdisplay_completion_list,
        !          1044:                                         Fsort (completions, Qstring_lessp));
        !          1045:   return Qnil;
        !          1046: }
        !          1047: 
        !          1048: DEFUN ("self-insert-and-exit", Fself_insert_and_exit, Sself_insert_and_exit, 0, 0, "",
        !          1049:   "Terminate minibuffer input.")
        !          1050:   ()
        !          1051: {
        !          1052:   self_insert_internal (last_command_char, 0);
        !          1053:   Fthrow (Qexit, Qnil);
        !          1054: }
        !          1055: 
        !          1056: DEFUN ("exit-minibuffer", Fexit_minibuffer, Sexit_minibuffer, 0, 0, "",
        !          1057:   "Terminate this minibuffer argument.")
        !          1058:   ()
        !          1059: {
        !          1060:   Fthrow (Qexit, Qnil);
        !          1061: }
        !          1062: 
        !          1063: DEFUN ("minibuffer-depth", Fminibuffer_depth, Sminibuffer_depth, 0, 0, 0,
        !          1064:   "Return current depth of activations of minibuffer, a nonnegative integer.")
        !          1065:   ()
        !          1066: {
        !          1067:   return make_number (minibuf_level);
        !          1068: }
        !          1069: 
        !          1070: 
        !          1071: init_minibuf_once ()
        !          1072: {
        !          1073:   Vminibuffer_list = Qnil;
        !          1074:   staticpro (&Vminibuffer_list);
        !          1075: }
        !          1076: 
        !          1077: syms_of_minibuf ()
        !          1078: {
        !          1079:   minibuf_level = 0;
        !          1080:   minibuf_prompt = 0;
        !          1081:   minibuf_save_vector_size = 5;
        !          1082:   minibuf_save_vector = (struct minibuf_save_data *) malloc (5 * sizeof (struct minibuf_save_data));
        !          1083: 
        !          1084:   Qminibuffer_completion_table = intern ("minibuffer-completion-table");
        !          1085:   staticpro (&Qminibuffer_completion_table);
        !          1086: 
        !          1087:   Qminibuffer_completion_confirm = intern ("minibuffer-completion-confirm");
        !          1088:   staticpro (&Qminibuffer_completion_confirm);
        !          1089: 
        !          1090:   Qminibuffer_completion_predicate = intern ("minibuffer-completion-predicate");
        !          1091:   staticpro (&Qminibuffer_completion_predicate);
        !          1092: 
        !          1093:   staticpro (&last_minibuf_string);
        !          1094:   last_minibuf_string = Qnil;
        !          1095: 
        !          1096:   Quser_variable_p = intern ("user-variable-p");
        !          1097:   staticpro (&Quser_variable_p);
        !          1098: 
        !          1099: 
        !          1100: 
        !          1101:   DEFVAR_BOOL ("completion-auto-help", &completion_auto_help,
        !          1102:     "*Non-nil means automatically provide help for invalid completion input.");
        !          1103:   completion_auto_help = 1;
        !          1104: 
        !          1105:   DEFVAR_BOOL ("completion-ignore-case", &completion_ignore_case,
        !          1106:     "Non-nil means don't consider case significant in completion.");
        !          1107:   completion_ignore_case = 0;
        !          1108: 
        !          1109:   DEFVAR_BOOL ("enable-recursive-minibuffers", &enable_recursive_minibuffers,
        !          1110:     "*Non-nil means to allow minibuffers to invoke commands which use\n\
        !          1111: recursive minibuffers.");
        !          1112:   enable_recursive_minibuffers = 0;
        !          1113: 
        !          1114:   DEFVAR_LISP ("minibuffer-completion-table", &Vminibuffer_completion_table,
        !          1115:     "Alist or obarray used for completion in the minibuffer.");
        !          1116:   Vminibuffer_completion_table = Qnil;
        !          1117: 
        !          1118:   DEFVAR_LISP ("minibuffer-completion-predicate", &Vminibuffer_completion_predicate,
        !          1119:     "Holds PREDICATE argument to completing-read.");
        !          1120:   Vminibuffer_completion_predicate = Qnil;
        !          1121: 
        !          1122:   DEFVAR_LISP ("minibuffer-completion-confirm", &Vminibuffer_completion_confirm,
        !          1123:     "Non-nil => demand confirmation of completion before exiting minibuffer.");
        !          1124:   Vminibuffer_completion_confirm = Qnil;
        !          1125: 
        !          1126:   DEFVAR_LISP ("minibuffer-help-form", &Vminibuffer_help_form,
        !          1127:     "Value that help-form takes on inside the minibuffer.");
        !          1128:   Vminibuffer_help_form = Qnil;
        !          1129: 
        !          1130:   defsubr (&Sread_from_minibuffer);
        !          1131:   defsubr (&Seval_minibuffer);
        !          1132:   defsubr (&Sread_minibuffer);
        !          1133:   defsubr (&Sread_string);
        !          1134:   defsubr (&Sread_command);
        !          1135:   defsubr (&Sread_variable);
        !          1136:   defsubr (&Sread_buffer);
        !          1137:   defsubr (&Sread_no_blanks_input);
        !          1138:   defsubr (&Sminibuffer_depth);
        !          1139: 
        !          1140:   defsubr (&Stry_completion);
        !          1141:   defsubr (&Sall_completions);
        !          1142:   defsubr (&Scompleting_read);
        !          1143:   defsubr (&Sminibuffer_complete);
        !          1144:   defsubr (&Sminibuffer_complete_word);
        !          1145:   defsubr (&Sminibuffer_complete_and_exit);
        !          1146:   defsubr (&Sdisplay_completion_list);
        !          1147:   defsubr (&Sminibuffer_completion_help);
        !          1148: 
        !          1149:   defsubr (&Sself_insert_and_exit);
        !          1150:   defsubr (&Sexit_minibuffer);
        !          1151: 
        !          1152: }
        !          1153: 
        !          1154: keys_of_minibuf ()
        !          1155: {
        !          1156:   ndefkey (Vminibuffer_local_map, Ctl ('g'), "abort-recursive-edit");
        !          1157:   ndefkey (Vminibuffer_local_map, Ctl ('m'), "exit-minibuffer");
        !          1158:   ndefkey (Vminibuffer_local_map, Ctl ('j'), "exit-minibuffer");
        !          1159: 
        !          1160:   ndefkey (Vminibuffer_local_ns_map, Ctl ('g'), "abort-recursive-edit");
        !          1161:   ndefkey (Vminibuffer_local_ns_map, Ctl ('m'), "exit-minibuffer");
        !          1162:   ndefkey (Vminibuffer_local_ns_map, Ctl ('j'), "exit-minibuffer");
        !          1163: 
        !          1164:   ndefkey (Vminibuffer_local_ns_map, ' ', "exit-minibuffer");
        !          1165:   ndefkey (Vminibuffer_local_ns_map, '\t', "exit-minibuffer");
        !          1166:   ndefkey (Vminibuffer_local_ns_map, '?', "self-insert-and-exit");
        !          1167: 
        !          1168:   ndefkey (Vminibuffer_local_completion_map, Ctl ('g'), "abort-recursive-edit");
        !          1169:   ndefkey (Vminibuffer_local_completion_map, Ctl ('m'), "exit-minibuffer");
        !          1170:   ndefkey (Vminibuffer_local_completion_map, Ctl ('j'), "exit-minibuffer");
        !          1171:   ndefkey (Vminibuffer_local_completion_map, '\t', "minibuffer-complete");
        !          1172:   ndefkey (Vminibuffer_local_completion_map, ' ', "minibuffer-complete-word");
        !          1173:   ndefkey (Vminibuffer_local_completion_map, '?', "minibuffer-completion-help");
        !          1174: 
        !          1175:   ndefkey (Vminibuffer_local_must_match_map, Ctl ('g'), "abort-recursive-edit");
        !          1176:   ndefkey (Vminibuffer_local_must_match_map, Ctl ('m'), "minibuffer-complete-and-exit");
        !          1177:   ndefkey (Vminibuffer_local_must_match_map, Ctl ('j'), "minibuffer-complete-and-exit");
        !          1178:   ndefkey (Vminibuffer_local_must_match_map, '\t', "minibuffer-complete");
        !          1179:   ndefkey (Vminibuffer_local_must_match_map, ' ', "minibuffer-complete-word");
        !          1180:   ndefkey (Vminibuffer_local_must_match_map, '?', "minibuffer-completion-help");
        !          1181: }

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