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1.1 root 1: /* Minibuffer input and completion.
2: Copyright (C) 1985, 1986 Free Software Foundation, Inc.
3:
4: This file is part of GNU Emacs.
5:
6: GNU Emacs is distributed in the hope that it will be useful,
7: but WITHOUT ANY WARRANTY. No author or distributor
8: accepts responsibility to anyone for the consequences of using it
9: or for whether it serves any particular purpose or works at all,
10: unless he says so in writing. Refer to the GNU Emacs General Public
11: License for full details.
12:
13: Everyone is granted permission to copy, modify and redistribute
14: GNU Emacs, but only under the conditions described in the
15: GNU Emacs General Public License. A copy of this license is
16: supposed to have been given to you along with GNU Emacs so you
17: can know your rights and responsibilities. It should be in a
18: file named COPYING. Among other things, the copyright notice
19: and this notice must be preserved on all copies. */
20:
21:
22: #include "config.h"
23: #include "lisp.h"
24: #include "commands.h"
25: #include "buffer.h"
26: #include "window.h"
27: #include "syntax.h"
28: #include "dispextern.h"
29:
30: #define min(a, b) ((a) < (b) ? (a) : (b))
31:
32: /* List of buffers for use as minibuffers.
33: The first element of the list is used for the outermost minibuffer invocation,
34: the next element is used for a recursive minibuffer invocation, etc.
35: The list is extended at the end as deeped minibuffer recursions are encountered. */
36: Lisp_Object Vminibuffer_list;
37:
38: struct minibuf_save_data
39: {
40: char *prompt;
41: int prompt_width;
42: Lisp_Object help_form;
43: Lisp_Object current_prefix_arg;
44: };
45:
46: int minibuf_save_vector_size;
47: struct minibuf_save_data *minibuf_save_vector;
48:
49: int auto_help; /* Nonzero means display completion help for invalid input */
50:
51: /* Fread_minibuffer leaves the input, as a string, here */
52: Lisp_Object last_minibuf_string;
53:
54: /* Nonzero means let functions called when within a minibuffer
55: invoke recursive minibuffers (to read arguments, or whatever) */
56: int enable_recursive_minibuffers;
57:
58: /* help-form is bound to this while in the minibuffer. */
59:
60: Lisp_Object Vminibuffer_help_form;
61:
62: /* Nonzero means completion ignores case. */
63:
64: int completion_ignore_case;
65:
66: Lisp_Object Quser_variable_p;
67:
68: /* Width in columns of current minibuffer prompt. */
69:
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, prefix, prompt, expflag)
80: Lisp_Object map;
81: Lisp_Object prefix;
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 (MinibufDepth == 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[MinibufDepth].prompt = minibuf_prompt;
105: minibuf_save_vector[MinibufDepth].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[MinibufDepth].help_form = Vhelp_form;
109: minibuf_save_vector[MinibufDepth].current_prefix_arg = Vcurrent_prefix_arg;
110: GCPRO2 (minibuf_save_vector[MinibufDepth].help_form,
111: minibuf_save_vector[MinibufDepth].current_prefix_arg);
112:
113:
114: record_unwind_protect (Fset_window_configuration,
115: Fcurrent_window_configuration ());
116:
117: val = bf_cur->directory;
118: Fset_buffer (get_minibuffer (MinibufDepth));
119: bf_cur->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: MinibufDepth++;
127: record_unwind_protect (read_minibuf_unwind, Qnil);
128: Vminibuf_scroll_window = Qnil;
129:
130: if (!NULL (prefix))
131: Finsert (1, &prefix);
132:
133: minibuf_prompt = (char *) alloca (XSTRING (prompt)->size + 1);
134: bcopy (XSTRING (prompt)->data, minibuf_prompt, XSTRING (prompt)->size + 1);
135: minibuf_message = 0;
136:
137: Vhelp_form = Vminibuffer_help_form;
138: bf_cur->keymap = map;
139: Frecursive_edit ();
140:
141: /* If cursor is on the minibuffer line,
142: show the user we have exited by putting it in column 0. */
143: if (cursY >= XFASTINT (XWINDOW (minibuf_window)->top)
144: && !noninteractive)
145: {
146: cursX = 0;
147: update_screen (1, 1);
148: }
149:
150: /* Make minibuffer contents into a string */
151: val = make_string (bf_p1 + 1, bf_s1 + bf_s2);
152: bcopy (bf_p2 + bf_s1 + 1,
153: XSTRING (val)->data + bf_s1,
154: bf_s2);
155: unbind_to (count);
156: UNGCPRO;
157:
158: /* VAL is the string of minibuffer text. */
159:
160: last_minibuf_string = val;
161:
162: /* If Lisp form desired instead of string, parse it */
163: if (expflag)
164: val = Fread (val);
165:
166: return val;
167: }
168:
169: /* Return a buffer to be used as the minibuffer at depth `depth'.
170: depth = 0 is the lowest allowed argument, and that is the value
171: used for nonrecursive minibuffer invocations */
172:
173: Lisp_Object
174: get_minibuffer (depth)
175: int depth;
176: {
177: Lisp_Object tail, num, buf;
178: char name[14];
179: extern Lisp_Object nconc2 ();
180:
181: XFASTINT (num) = depth;
182: tail = Fnthcdr (num, Vminibuffer_list);
183: if (NULL (tail))
184: {
185: tail = Fcons (Qnil, Qnil);
186: Vminibuffer_list = nconc2 (Vminibuffer_list, tail);
187: }
188: buf = Fcar (tail);
189: if (NULL (buf) || NULL (XBUFFER (buf)->name))
190: {
191: sprintf (name, " *Minibuf-%d*", depth);
192: buf = Fget_buffer_create (build_string (name));
193: XCONS (tail)->car = buf;
194: }
195: else
196: reset_buffer (XBUFFER (buf));
197: return buf;
198: }
199:
200: /* This function is called on exiting minibuffer, whether normally or not,
201: and it restores the current window, buffer, etc. */
202:
203: void
204: read_minibuf_unwind ()
205: {
206: /* Erase the minibuffer we were using at this level. */
207: Fset_buffer (XWINDOW (minibuf_window)->buffer);
208: Ferase_buffer ();
209:
210: /* If this was a recursive minibuffer,
211: tie the minibuffer window back to the outer level minibuffer buffer */
212: MinibufDepth--;
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[MinibufDepth].prompt;
219: minibuf_prompt_width = minibuf_save_vector[MinibufDepth].prompt_width;
220: Vhelp_form = minibuf_save_vector[MinibufDepth].help_form;
221: Vcurrent_prefix_arg = minibuf_save_vector[MinibufDepth].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);
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: bestmatchsize = (matchsize >= 0) ? matchsize : compare;
467: }
468: }
469: }
470:
471: if (NULL (bestmatch))
472: return Qnil; /* No completions found */
473: if (matchcount == 1 && bestmatchsize == XSTRING (string)->size)
474: return Qt;
475:
476: XFASTINT (zero) = 0; /* Else extract the part in which */
477: XFASTINT (end) = bestmatchsize; /* all completions agree */
478: return Fsubstring (bestmatch, zero, end);
479: }
480:
481: /* Compare exactly LEN chars of strings at S1 and S2,
482: ignoring case if appropriate.
483: Return -1 if strings match,
484: else number of chars that match at the beginning. */
485:
486: scmp (s1, s2, len)
487: register char *s1, *s2;
488: int len;
489: {
490: register int l = len;
491:
492: if (completion_ignore_case)
493: {
494: while (l && downcase_table[*s1++] == downcase_table[*s2++])
495: l--;
496: }
497: else
498: {
499: while (l && *s1++ == *s2++)
500: l--;
501: }
502: if (l == 0)
503: return -1;
504: else return len - l;
505: }
506:
507: DEFUN ("all-completions", Fall_completions, Sall_completions, 2, 3, 0,
508: "Search for partial matches to STRING in ALIST.\n\
509: Each car of each element of ALIST is tested to see if it begins with STRING.\n\
510: The value is a list of all the strings from ALIST that match.\n\
511: ALIST can be an obarray instead of an alist.\n\
512: Then the print names of all symbols in the obarray are the possible matches.\n\
513: \n\
514: If optional third argument PREDICATE is non-nil,\n\
515: it is used to test each possible match.\n\
516: The match is a candidate only if PREDICATE returns non-nil.\n\
517: The argument given to PREDICATE is the alist element or the symbol from the obarray.")
518: (string, alist, pred)
519: Lisp_Object string, alist, pred;
520: {
521: Lisp_Object tail, elt, eltstring;
522: Lisp_Object allmatches;
523: int list = CONSP (alist);
524: int index, obsize;
525: Lisp_Object bucket, tem;
526: struct gcpro gcpro1, gcpro2, gcpro3;
527:
528: CHECK_STRING (string, 0);
529: if (!list && XTYPE (alist) != Lisp_Vector)
530: {
531: return call3 (alist, string, pred, Qt);
532: }
533: allmatches = Qnil;
534:
535: if (list)
536: tail = alist;
537: else
538: {
539: index = 0;
540: obsize = XVECTOR (alist)->size;
541: bucket = XVECTOR (alist)->contents[index];
542: }
543:
544: while (1)
545: {
546: /* Get the next element of the alist or obarray. */
547: /* Exit the loop if the elements are all used up. */
548: /* elt gets the alist element or symbol.
549: eltstring gets the name to check as a completion. */
550:
551: if (list)
552: {
553: if (NULL (tail))
554: break;
555: elt = Fcar (tail);
556: eltstring = Fcar (elt);
557: tail = Fcdr (tail);
558: }
559: else
560: {
561: if (XFASTINT (bucket) != 0)
562: {
563: elt = bucket;
564: eltstring = Fsymbol_name (elt);
565: if (XSYMBOL (bucket)->next)
566: XSETSYMBOL (bucket, XSYMBOL (bucket)->next);
567: else
568: XFASTINT (bucket) = 0;
569: }
570: else if (++index >= obsize)
571: break;
572: else
573: {
574: bucket = XVECTOR (alist)->contents[index];
575: continue;
576: }
577: }
578:
579: /* Is this element a possible completion? */
580:
581: if (XTYPE (eltstring) == Lisp_String &&
582: XSTRING (string)->size <= XSTRING (eltstring)->size &&
583: XSTRING (eltstring)->data[0] != ' ' &&
584: 0 > scmp (XSTRING (eltstring)->data, XSTRING (string)->data,
585: XSTRING (string)->size))
586: {
587: /* Yes. */
588: /* Ignore this element if there is a predicate
589: and the predicate doesn't like it. */
590:
591: if (!NULL (pred))
592: {
593: if (EQ (pred, Qcommandp))
594: tem = Fcommandp (elt);
595: else
596: {
597: GCPRO3 (tail, eltstring, allmatches);
598: tem = call1 (pred, elt);
599: UNGCPRO;
600: }
601: if (NULL (tem)) continue;
602: }
603: /* Ok => put it on the list. */
604: allmatches = Fcons (eltstring, allmatches);
605: }
606: }
607:
608: return Fnreverse (allmatches);
609: }
610:
611: Lisp_Object Vminibuffer_completion_table, Qminibuffer_completion_table;
612: Lisp_Object Vminibuffer_completion_predicate, Qminibuffer_completion_predicate;
613: Lisp_Object Vminibuffer_completion_confirm, Qminibuffer_completion_confirm;
614:
615: DEFUN ("completing-read", Fcompleting_read, Scompleting_read, 2, 5, 0,
616: "Read a string in the minibuffer, with completion.\n\
617: Args are PROMPT, TABLE, PREDICATE, REQUIRE-MATCH and INITIAL-INPUT.\n\
618: PROMPT is a string to prompt with; normally it ends in a colon and a space.\n\
619: TABLE is an alist whose elements' cars are strings, or an obarray (see try-completion).\n\
620: PREDICATE limits completion to a subset of TABLE; see try-completion for details.\n\
621: If REQUIRE-MATCH is non-nil, the user is not allowed to exit unless\n\
622: the input is (or completes to) an element of TABLE.\n\
623: If it is also not t, Return does not exit if it does non-null completion.\n\
624: If INITIAL-INPUT is non-nil, insert it in the minibuffer initially.\n\
625: Case is ignored if ambient value of completion-ignore-case is non-nil.")
626: (prompt, table, pred, require_match, init)
627: Lisp_Object prompt, table, pred, require_match, init;
628: {
629: Lisp_Object val;
630: int count = specpdl_ptr - specpdl;
631: specbind (Qminibuffer_completion_table, table);
632: specbind (Qminibuffer_completion_predicate, pred);
633: specbind (Qminibuffer_completion_confirm,
634: EQ (require_match, Qt) ? Qnil : Qt);
635: val = read_minibuf (NULL (require_match)
636: ? Vminibuffer_local_completion_map
637: : Vminibuffer_local_must_match_map,
638: init, prompt, 0);
639: unbind_to (count);
640: return val;
641: }
642:
643: temp_minibuf_message (m)
644: char *m;
645: {
646: int osize = NumCharacters + 1;
647: Lisp_Object oinhibit;
648: oinhibit = Vinhibit_quit;
649:
650: SetPoint (osize);
651: InsStr (m);
652: SetPoint (osize);
653: Vinhibit_quit = Qt;
654: Fsit_for (make_number (2), Qnil);
655: del_range (point, NumCharacters + 1);
656: if (!NULL (Vquit_flag))
657: {
658: Vquit_flag = Qnil;
659: unread_command_char = Ctl ('g');
660: }
661: Vinhibit_quit = oinhibit;
662: }
663:
664: Lisp_Object Fminibuffer_completion_help ();
665:
666: /* returns:
667: * 0 no possible completion
668: * 1 was already an exact and unique completion
669: * 3 was already an exact completion
670: * 4 completed to an exact completion
671: * 5 some completion happened
672: * 6 no completion happened
673: */
674: int
675: do_completion ()
676: {
677: Lisp_Object completion, tem;
678: int completedp;
679:
680: completion = Ftry_completion (Fbuffer_string (), Vminibuffer_completion_table,
681: Vminibuffer_completion_predicate);
682: if (NULL (completion))
683: {
684: Ding ();
685: temp_minibuf_message (" [No match]");
686: return 0;
687: }
688:
689: if (EQ (completion, Qt)) /* exact and unique match */
690: return 1;
691:
692: /* compiler bug */
693: tem = Fstring_equal (completion, Fbuffer_string());
694: if (completedp = NULL (tem))
695: {
696: Ferase_buffer (); /* Some completion happened */
697: Finsert (1, &completion);
698: }
699:
700: /* It did find a match. Do we match some possibility exactly now? */
701: if (CONSP (Vminibuffer_completion_table))
702: tem = Fassoc (Fbuffer_string (), Vminibuffer_completion_table);
703: else if (XTYPE (Vminibuffer_completion_table) == Lisp_Vector)
704: {
705: /* the primitive used by Fintern_soft */
706: extern Lisp_Object oblookup ();
707:
708: tem = Fbuffer_string ();
709: /* Bypass intern-soft as that loses for nil */
710: tem = oblookup (Vminibuffer_completion_table,
711: XSTRING (tem)->data, XSTRING (tem)->size);
712: if (XTYPE (tem) != Lisp_Symbol)
713: tem = Qnil;
714: else if (!NULL (Vminibuffer_completion_predicate))
715: tem = call1 (Vminibuffer_completion_predicate, tem);
716: else
717: tem = Qt;
718: }
719: else
720: tem = call3 (Vminibuffer_completion_table,
721: Fbuffer_string (),
722: Vminibuffer_completion_predicate,
723: Qlambda);
724:
725: if (NULL (tem))
726: { /* not an exact match */
727: if (completedp)
728: return 5;
729: else if (auto_help)
730: Fminibuffer_completion_help ();
731: else
732: temp_minibuf_message (" [Next char not unique]");
733: return 6;
734: }
735: else
736: return (completedp ? 4 : 3);
737: }
738:
739:
740: DEFUN ("minibuffer-complete", Fminibuffer_complete, Sminibuffer_complete, 0, 0, "",
741: "Complete the minibuffer contents as far as possible.")
742: ()
743: {
744: register int i = do_completion ();
745: switch (i)
746: {
747: case 0:
748: return Qnil;
749:
750: case 1:
751: temp_minibuf_message(" [Sole completion]");
752: break;
753:
754: case 3:
755: temp_minibuf_message(" [Complete, but not unique]");
756: break;
757: }
758: return Qt;
759: }
760:
761: DEFUN ("minibuffer-complete-and-exit", Fminibuffer_complete_and_exit,
762: Sminibuffer_complete_and_exit, 0, 0, "",
763: "Complete the minibuffer contents, and maybe exit.\n\
764: Exit if the name is valid with no completion needed.\n\
765: If name was completed to a valid match,\n\
766: a repetition of this command will exit.")
767: ()
768: {
769: register int i;
770:
771: /* Allow user to specify null string */
772: if (NumCharacters == 0)
773: goto exit;
774:
775: i = do_completion ();
776: switch (i)
777: {
778: case 1:
779: case 3:
780: goto exit;
781:
782: case 4:
783: if (!NULL (Vminibuffer_completion_confirm))
784: {
785: temp_minibuf_message(" [Confirm]");
786: return Qnil;
787: }
788: else
789: goto exit;
790:
791: default:
792: return Qnil;
793: }
794: exit:
795: Fthrow (Qexit, Qnil);
796: /* NOTREACHED */
797: }
798:
799: DEFUN ("minibuffer-complete-word", Fminibuffer_complete_word, Sminibuffer_complete_word,
800: 0, 0, "",
801: "Complete the minibuffer contents at most a single word.")
802: ()
803: {
804: Lisp_Object completion, tem;
805: register int i;
806: register unsigned char *completion_string;
807: /* We keep calling Fbuffer_string
808: rather than arrange for GC to hold onto a pointer to
809: one of the strings thus made. */
810:
811: completion = Ftry_completion (Fbuffer_string (),
812: Vminibuffer_completion_table,
813: Vminibuffer_completion_predicate);
814: if (NULL (completion))
815: {
816: Ding ();
817: temp_minibuf_message (" [No match]");
818: return Qnil;
819: }
820: if (EQ (completion, Qt))
821: return Qnil;
822:
823: #if 0 /* How the below code used to look, for reference */
824: tem = Fbuffer_string ();
825: b = XSTRING (tem)->data;
826: i = NumCharacters - XSTRING (completion)->size;
827: p = XSTRING (completion)->data;
828: if (i > 0 ||
829: 0 <= scmp (b, p, NumCharacters))
830: {
831: i = 1;
832: /* Set buffer to longest match of buffer tail and completion head. */
833: while (0 <= scmp (b + i, p, NumCharacters - i))
834: i++;
835: del_range (1, i + 1);
836: SetPoint (NumCharacters + 1);
837: }
838: #else /* Rewritten code */
839: {
840: register unsigned char *buffer_string;
841: int buffer_length, completion_length;
842:
843: tem = Fbuffer_string ();
844: buffer_string = XSTRING (tem)->data;
845: completion_string = XSTRING (completion)->data;
846: buffer_length = XSTRING (tem)->size; /* ie NumCharacters */
847: completion_length = XSTRING (completion)->size;
848: i = buffer_length - completion_length;
849: /* Mly: I don't understand what this is supposed to do AT ALL */
850: if (i > 0 ||
851: 0 <= scmp (buffer_string, completion_string, buffer_length))
852: {
853: /* Set buffer to longest match of buffer tail and completion head. */
854: if (i <= 0) i = 1;
855: buffer_string += i;
856: buffer_length -= i;
857: while (0 <= scmp (buffer_string++, completion_string, buffer_length--))
858: i++;
859: del_range (1, i + 1);
860: SetPoint (NumCharacters + 1);
861: }
862: }
863: #endif /* Rewritten code */
864: i = NumCharacters;
865:
866: /* If completion finds next char not unique,
867: consider adding a space or a hyphen */
868: if (i == XSTRING (completion)->size)
869: {
870: tem = Ftry_completion (concat2 (Fbuffer_string (), build_string (" ")),
871: Vminibuffer_completion_table,
872: Vminibuffer_completion_predicate);
873: if (XTYPE (tem) == Lisp_String)
874: completion = tem;
875: else
876: {
877: tem = Ftry_completion (concat2 (Fbuffer_string (), build_string ("-")),
878: Vminibuffer_completion_table,
879: Vminibuffer_completion_predicate);
880: if (XTYPE (tem) == Lisp_String)
881: completion = tem;
882: }
883: }
884:
885: /* Now find first word-break in the stuff found by completion.
886: i gets index in string of where to stop completing. */
887: completion_string = XSTRING (completion)->data;
888:
889: for (; i < XSTRING (completion)->size; i++)
890: if (SYNTAX (completion_string[i]) != Sword) break;
891: if (i < XSTRING (completion)->size)
892: i = i + 1;
893:
894: /* If got no characters, print help for user. */
895:
896: if (i == NumCharacters)
897: {
898: if (auto_help)
899: Fminibuffer_completion_help ();
900: return Qnil;
901: }
902:
903: /* Otherwise insert in minibuffer the chars we got */
904:
905: Ferase_buffer ();
906: InsCStr (completion_string, i);
907: return Qt;
908: }
909:
910: DEFUN ("display-completion-list", Fdisplay_completion_list, Sdisplay_completion_list,
911: 1, 1, 0,
912: "Display in a buffer the list of completions, COMPLETIONS.\n\
913: Each element may be just a symbol or string\n\
914: or may be a list of two strings to be printed as if concatenated.")
915: (completions)
916: Lisp_Object completions;
917: {
918: register Lisp_Object tail, elt;
919: register int i;
920: struct buffer *old = bf_cur;
921: SetBfp (XBUFFER (Vstandard_output));
922:
923: if (NULL (completions))
924: InsStr ("There are no possible completions of what you have typed.");
925: else
926: {
927: InsStr ("Possible completions are:");
928: for (tail = completions, i = 0; !NULL (tail); tail = Fcdr (tail), i++)
929: {
930: /* this needs fixing for the case of long completions
931: and/or narrow windows */
932: /* Sadly, the window it will appear in is not known
933: until after the text has been made. */
934: if (i & 1)
935: Findent_to (make_number (35), make_number (1));
936: else
937: Fterpri (Qnil);
938: elt = Fcar (tail);
939: if (CONSP (elt))
940: {
941: Fprinc (Fcar (elt), Qnil);
942: Fprinc (Fcar (Fcdr (elt)), Qnil);
943: }
944: else
945: Fprinc (elt, Qnil);
946: }
947: }
948: SetBfp (old);
949: return Qnil;
950: }
951:
952: DEFUN ("minibuffer-completion-help", Fminibuffer_completion_help, Sminibuffer_completion_help,
953: 0, 0, "",
954: "Display a list of possible completions of the current minibuffer contents.")
955: ()
956: {
957: Lisp_Object completions;
958: message ("Making completion list...");
959: completions = Fall_completions (Fbuffer_string (), Vminibuffer_completion_table,
960: Vminibuffer_completion_predicate);
961: minibuf_message = 0;
962: if (NULL (completions))
963: { Ding ();
964: temp_minibuf_message (" [No completions]"); }
965: else
966: internal_with_output_to_temp_buffer (" *Completions*",
967: Fdisplay_completion_list,
968: Fsort (completions, Qstring_lessp));
969: return Qnil;
970: }
971:
972: DEFUN ("self-insert-and-exit", Fself_insert_and_exit, Sself_insert_and_exit, 0, 0, "",
973: "Terminate minibuffer input.")
974: ()
975: {
976: SelfInsert (last_command_char, 0);
977: Fthrow (Qexit, Qnil);
978: }
979:
980: DEFUN ("exit-minibuffer", Fexit_minibuffer, Sexit_minibuffer, 0, 0, "",
981: "Terminate this minibuffer argument.")
982: ()
983: {
984: Fthrow (Qexit, Qnil);
985: }
986:
987: DEFUN ("minibuffer-depth", Fminibuffer_depth, Sminibuffer_depth, 0, 0, 0,
988: "Return current depth of activations of minibuffer, a nonnegative integer.")
989: ()
990: {
991: return make_number (MinibufDepth);
992: }
993:
994:
995: init_minibuf_once ()
996: {
997: Vminibuffer_list = Qnil;
998: staticpro (&Vminibuffer_list);
999: }
1000:
1001: syms_of_minibuf ()
1002: {
1003: MinibufDepth = 0;
1004: minibuf_prompt = 0;
1005: minibuf_save_vector_size = 5;
1006: minibuf_save_vector = (struct minibuf_save_data *) malloc (5 * sizeof (struct minibuf_save_data));
1007:
1008: Qminibuffer_completion_table = intern ("minibuffer-completion-table");
1009: staticpro (&Qminibuffer_completion_table);
1010:
1011: Qminibuffer_completion_confirm = intern ("minibuffer-completion-confirm");
1012: staticpro (&Qminibuffer_completion_confirm);
1013:
1014: Qminibuffer_completion_predicate = intern ("minibuffer-completion-predicate");
1015: staticpro (&Qminibuffer_completion_predicate);
1016:
1017: staticpro (&last_minibuf_string);
1018: last_minibuf_string = Qnil;
1019:
1020: Quser_variable_p = intern ("user-variable-p");
1021: staticpro (&Quser_variable_p);
1022:
1023:
1024:
1025: DEFVAR_BOOL ("completion-auto-help", &auto_help,
1026: "*Non-nil means automatically provide help for invalid completion input.");
1027: auto_help = 1;
1028:
1029: DEFVAR_BOOL ("completion-ignore-case", &completion_ignore_case,
1030: "Non-nil means don't consider case significant in completion.");
1031: completion_ignore_case = 0;
1032:
1033: DEFVAR_BOOL ("enable-recursive-minibuffers", &enable_recursive_minibuffers,
1034: "*Non-nil means to allow minibuffers to invoke commands which use\n\
1035: recursive minibuffers.");
1036: enable_recursive_minibuffers = 0;
1037:
1038: DEFVAR_LISP ("minibuffer-completion-table", &Vminibuffer_completion_table,
1039: "Alist or obarray used for completion in the minibuffer.");
1040: Vminibuffer_completion_table = Qnil;
1041:
1042: DEFVAR_LISP ("minibuffer-completion-predicate", &Vminibuffer_completion_predicate,
1043: "Holds PREDICATE argument to completing-read.");
1044: Vminibuffer_completion_predicate = Qnil;
1045:
1046: DEFVAR_LISP ("minibuffer-completion-confirm", &Vminibuffer_completion_confirm,
1047: "Non-nil => demand confirmation of completion before exiting minibuffer.");
1048: Vminibuffer_completion_confirm = Qnil;
1049:
1050: DEFVAR_LISP ("minibuffer-help-form", &Vminibuffer_help_form,
1051: "Value that help-form takes on inside the minibuffer.");
1052: Vminibuffer_help_form = Qnil;
1053:
1054: defsubr (&Sread_from_minibuffer);
1055: defsubr (&Seval_minibuffer);
1056: defsubr (&Sread_minibuffer);
1057: defsubr (&Sread_string);
1058: defsubr (&Sread_command);
1059: defsubr (&Sread_variable);
1060: defsubr (&Sread_buffer);
1061: defsubr (&Sread_no_blanks_input);
1062: defsubr (&Sminibuffer_depth);
1063:
1064: defsubr (&Stry_completion);
1065: defsubr (&Sall_completions);
1066: defsubr (&Scompleting_read);
1067: defsubr (&Sminibuffer_complete);
1068: defsubr (&Sminibuffer_complete_word);
1069: defsubr (&Sminibuffer_complete_and_exit);
1070: defsubr (&Sdisplay_completion_list);
1071: defsubr (&Sminibuffer_completion_help);
1072:
1073: defsubr (&Sself_insert_and_exit);
1074: defsubr (&Sexit_minibuffer);
1075:
1076: }
1077:
1078: keys_of_minibuf ()
1079: {
1080: ndefkey (Vminibuffer_local_map, Ctl ('g'), "abort-recursive-edit");
1081: ndefkey (Vminibuffer_local_map, Ctl ('m'), "exit-minibuffer");
1082: ndefkey (Vminibuffer_local_map, Ctl ('j'), "exit-minibuffer");
1083:
1084: ndefkey (Vminibuffer_local_ns_map, Ctl ('g'), "abort-recursive-edit");
1085: ndefkey (Vminibuffer_local_ns_map, Ctl ('m'), "exit-minibuffer");
1086: ndefkey (Vminibuffer_local_ns_map, Ctl ('j'), "exit-minibuffer");
1087:
1088: ndefkey (Vminibuffer_local_ns_map, ' ', "exit-minibuffer");
1089: ndefkey (Vminibuffer_local_ns_map, '\t', "exit-minibuffer");
1090: ndefkey (Vminibuffer_local_ns_map, '?', "self-insert-and-exit");
1091:
1092: ndefkey (Vminibuffer_local_completion_map, Ctl ('g'), "abort-recursive-edit");
1093: ndefkey (Vminibuffer_local_completion_map, Ctl ('m'), "exit-minibuffer");
1094: ndefkey (Vminibuffer_local_completion_map, Ctl ('j'), "exit-minibuffer");
1095: ndefkey (Vminibuffer_local_completion_map, '\t', "minibuffer-complete");
1096: ndefkey (Vminibuffer_local_completion_map, ' ', "minibuffer-complete-word");
1097: ndefkey (Vminibuffer_local_completion_map, '?', "minibuffer-completion-help");
1098:
1099: ndefkey (Vminibuffer_local_must_match_map, Ctl ('g'), "abort-recursive-edit");
1100: ndefkey (Vminibuffer_local_must_match_map, Ctl ('m'), "minibuffer-complete-and-exit");
1101: ndefkey (Vminibuffer_local_must_match_map, Ctl ('j'), "minibuffer-complete-and-exit");
1102: ndefkey (Vminibuffer_local_must_match_map, '\t', "minibuffer-complete");
1103: ndefkey (Vminibuffer_local_must_match_map, ' ', "minibuffer-complete-word");
1104: ndefkey (Vminibuffer_local_must_match_map, '?', "minibuffer-completion-help");
1105: }
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