utilities.el 40.9 KB
Newer Older
David Byers's avatar
David Byers committed
1
;;;;; -*-coding: iso-8859-1;-*-
2
;;;;;
3
4
5
6
7
8
9
;;;;; $Id$
;;;;; Copyright (C) 1996  Lysator Academic Computer Association.
;;;;;
;;;;; This file is part of the LysKOM server.
;;;;; 
;;;;; LysKOM is free software; you can redistribute it and/or modify it
;;;;; under the terms of the GNU General Public License as published by 
10
;;;;; the Free Software Foundation; either version 2, or (at your option) 
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
;;;;; any later version.
;;;;; 
;;;;; LysKOM is distributed in the hope that it will be useful, but WITHOUT
;;;;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
;;;;; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
;;;;; for more details.
;;;;; 
;;;;; You should have received a copy of the GNU General Public License
;;;;; along with LysKOM; see the file COPYING.  If not, write to
;;;;; Lysator, c/o ISY, Linkoping University, S-581 83 Linkoping, SWEDEN,
;;;;; or the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, 
;;;;; MA 02139, USA.
;;;;;
;;;;; Please mail bug reports to bug-lyskom@lysator.liu.se. 
;;;;;
;;;; ================================================================
;;;; ================================================================
;;;;
29
;;;; File: utilities.el
30
31
32
33
34
35
36
37
38
39
40
;;;;
;;;; This file contains general lisp utility functions and
;;;; lyskom-specific utility functions (such as date formatting and
;;;; minibuffer reading)
;;;;


(setq lyskom-clientversion-long
      (concat lyskom-clientversion-long
	      "$Id$\n"))

David Byers's avatar
David Byers committed
41
42
43
44
45
46
;;;
;;; Need Per Abrahamsens widget and custom packages There should be a
;;; better way of doing this, but I'll be darned if I know how. The
;;; various files need to be loaded in a very specific order.
;;;

47
;;; Define widget wrappers for all the functions in macros.el
48
49
50
51
52
53
54
55
56
57
58
59
60
61

;;;
;;; Lisp utility functions
;;;

(defsubst listify-vector (vector)
  "Turn VECTOR into a list"
  (append vector nil))

(defun reverse-assoc (key cache)
  "Same as assoc, but searches on last element in a list"
  (reverse (assoc key (mapcar (function reverse) cache))))


62
63
(defun nfirst (n list)
  "Return a list of the N first elements of LIST."
David Byers's avatar
David Byers committed
64
65
66
67
68
69
  (let ((result nil))
    (while (and (> n 0) list)
      (setq result (cons (car list) result)
            list (cdr list)
            n (1- n)))
    (nreverse result)))
70

David Byers's avatar
David Byers committed
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
(defun lyskom-rotate-list (list el)
  "Destructively rotate LIST so EL becomes the first element.
If EL occurs more than one, the first occurrence is used."
  (let ((tail (memq el list)))
    (if (or (null tail) (eq el (car list)))
        list
      (setcdr (nthcdr (- (length list) (length tail) 1) list) nil)
      (setcdr (nthcdr (1- (length tail)) tail) list)
      tail)))

(defun lyskom-preceding-cons (list el)
  "Return the cons cell of LIST preceding the first cons cell whose car is EL.
Return nil if TAIL is the same as LIST or not a member of LIST."
  (unless (or (eq (car list) el)
              (not (memq el list)))
    (nthcdr (- (length list) (length (memq el list)) 1) list)))

(defun lyskom-insert-in-list (el list before)
  "Destructively insert EL in LIST before element BEFORE.
If BEFORE is not in the list, then insert EL at the end of the list."
  (cond ((eq before (car list))
         (cons el list))
        (t (setcdr (nthcdr (- (length list)
                              (length (memq before list)) 1) list)
                   (cons el (memq before list)))
           list)))

98
99
100
101
102
103
104
105
106
(defun lyskom-move-in-list (el list pos)
  "Destructively move EL within LIST so it appears at position POS."
  (when (memq el list)
    (setq list (delq el list))
    (cond ((eq 0 pos) (setq list (cons el list)))
          (t (setcdr (nthcdr (1- pos) list)
                     (cons el (nthcdr pos list))))))
  list)

107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
;;;
;;; +++ FIXME: If cl.el can be guaranteed, this is pointless.
;;;

(defun lyskom-butlast (x &optional n)
  "Returns a copy of LIST with the last N elements removed."
  (if (and n (<= n 0)) x
    (lyskom-nbutlast (copy-sequence x) n)))

(defun lyskom-nbutlast (x &optional n)
  "Modifies LIST to remove the last N elements."
  (let ((m (length x)))
    (or n (setq n 1))
    (and (< n m)
	 (progn
	   (if (> n 0) (setcdr (nthcdr (- (1- m) n) x) nil))
	   x))))
124

125
126
127
128
129
130
(defun skip-first-zeros (list)
  (while (and list (zerop (car list)))
    (setq list (cdr list)))
  list)


131
132
133
134
135
136
(defun filter-list (test list)
  (cond ((null list) '())
	((apply test (car list) nil)
	 (cons (car list) (filter-list test (cdr list))))
	(t (filter-list test (cdr list)))))

137
138
139
140
141
142
143
;;;============================================================
;;;
;;; Utility functions.
;;;
;;; These should be shared in LysKOM
;;;

David Byers's avatar
David Byers committed
144
145
146
147
148
(eval-and-compile
  (if (eval-when-compile (string-match "XEmacs" emacs-version))
      (defmacro lyskom-compiled-function-p (arg) `(compiled-function-p ,arg))
    (defmacro lyskom-compiled-function-p (arg) `(byte-code-function-p ,arg))))

149
(lyskom-provide-function copy-tree (l)
150
151
152
153
154
  "Recursively copy the list L"
  (cond ((atom l) l)
        (t (cons (copy-tree (car l))
                 (copy-tree (cdr l))))))

David Byers's avatar
David Byers committed
155
156
157
158
159
(lyskom-provide-function functionp (obj)
  "Returns t if OBJ is a function, nil otherwise."
  (cond
   ((symbolp obj) (fboundp obj))
   ((subrp obj))
David Byers's avatar
David Byers committed
160
   ((lyskom-compiled-function-p obj))
David Byers's avatar
David Byers committed
161
162
163
   ((consp obj)
    (if (eq (car obj) 'lambda) (listp (car (cdr obj)))))
   (t nil)))
164
165


166
167
168
169
(defun lyskom-ignore (&rest args)
  "Ignore all arguments"
  )

170
171
172
173
174
175
176
177
178
179
(defun regexpp (re)
  "Return non-nil if RE looks like a valid regexp."
  (let ((result t))
    (save-match-data
      (condition-case nil
          (string-match re "")
        (error (setq result nil))))
    result))


180
181
182
183
184
185
186
187
188
(defun mapcar2 (fn seq1 seq2)
  (let (result)
    (while (and seq1 seq2)
      (setq result (cons (funcall fn (car seq1) (car seq2)) result))
      (setq seq1 (cdr seq1)
            seq2 (cdr seq2)))
    (nreverse result)))


189
(defun lyskom-maxint ()
David Byers's avatar
David Byers committed
190
191
192
193
  (let ((n 1) 
        (l nil)
        (i 31))
    (while (and (> n 0) (> i 0))
194
      (setq l (cons n l))
David Byers's avatar
David Byers committed
195
196
      (setq n (* 2 n))
      (setq i (1- i)))
197
198
    (apply '+ l)))

David Byers's avatar
David Byers committed
199
200
201
202
;; Set lyskom-maxint correctly

(setq lyskom-max-int (lyskom-maxint))

David Byers's avatar
David Byers committed
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221

(defun lyskom-try-require (feature &optional message &rest args)
  "Load the feature FEATURE using require. 
If optional MESSAGE is non-nil, use it as a LysKOM format string 
taking one string argument to print an error message. Remaining
arguments are used as arguments for the format string.

Returns t if the feature is loaded or can be loaded, and nil otherwise."
  (or (featurep 'feature)
      (condition-case nil
          (progn (require feature)
                 t)
        (error 
         (when message
           (apply 'lyskom-format-insert-before-prompt message (symbol-name feature) args))
         nil))))
                               
      

222
223
224
225
226
(defun lyskom-emacs-version ()
  (cond ((string-match "^XEmacs" (emacs-version)) 'xemacs)
	(t 'emacs)))


David Byers's avatar
David Byers committed
227
228
(defvar lyskom-apo-timeout 0
  "Current millisecond timeout value for accept-process-output")
229

David Byers's avatar
David Byers committed
230
231
(defvar lyskom-apo-timeout-index 0
  "Index in lyskom-apo-timeout-vector-max where last timeout is")
232

David Byers's avatar
David Byers committed
233
234
235
(defconst lyskom-apo-timeout-vector
  [0 1000 1000 2000 3000 5000 8000 13000 21000 34000 55000 89000 144000 233000 377000 610000]
  "Vector of timeout values (usecs) for accept-process-output")
236

David Byers's avatar
David Byers committed
237
238
(defconst lyskom-apo-timeout-vector-max (1- (length lyskom-apo-timeout-vector))
  "Maximum index in lyskom-apo-timeout-vector")
239

240
(defun lyskom-next-apo-timeout ()
David Byers's avatar
David Byers committed
241
242
243
244
245
  (if (< lyskom-apo-timeout-index lyskom-apo-timeout-vector-max)
      (setq lyskom-apo-timeout
            (aref lyskom-apo-timeout-vector
                  (setq lyskom-apo-timeout-index
                        (1+ lyskom-apo-timeout-index))))))
246

247
(defun lyskom-reset-apo-timeout ()
David Byers's avatar
David Byers committed
248
249
  (setq lyskom-apo-timeout-index -1)
  (setq lyskom-apo-timeout 0))
250

251
(defun lyskom-accept-process-output ()
David Byers's avatar
David Byers committed
252
253
254
  "Call accept-process-output with the correct timeout values."
  (lyskom-next-apo-timeout)
  (accept-process-output nil 0 lyskom-apo-timeout))
255

256
257
258
259
260
261
262
263
264
265
266
267
268
(defun lyskom-current-time (&optional secs)
  "Return the time in a format that LysKOM understands.
If optional argument SECS is set, it is used in place of the value
of \(current-time\)."
  (let ((time (decode-time (or secs (current-time)))))
    (setcar (cdr (cdr (cdr (cdr time))))
            (1- (car (cdr (cdr (cdr (cdr time)))))))
    (setcar (cdr (cdr (cdr (cdr (cdr time)))))
            (- (car (cdr (cdr (cdr (cdr (cdr time))))))
               1900))
    time))


269

270
271
272
273
;;;
;;; LysKOM utility functions
;;;

274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
(lyskom-provide-function string-to-sequence (string type)
  "Convert STRING to a sequence of TYPE which contains characters in STRING.
TYPE should be `list' or `vector'."
  (let ((len (length string))
	(i 0)
	val)
    (cond ((eq type 'list)
	   (setq val (make-list len 0))
	   (let ((l val))
	     (while (< i len)
	       (setcar l (aref string i))
	       (setq l (cdr l) i (1+ i)))))
	  ((eq type 'vector)
	   (setq val (make-vector len 0))
	   (while (< i len)
	     (aset val i (aref string i))
	     (setq i (1+ i))))
	  (t
	   (error "Invalid type: %s" type)))
    val))

(lyskom-provide-subst string-to-vector (string)
  "Return a vector of characters in STRING."
  (string-to-sequence string 'vector))

David Byers's avatar
David Byers committed
299
300
301
302
303
304
305
306
307
;;;
;;; WARNING!
;;;
;;; The following variable is *important* if you fuck it up in any
;;; way, the functions used to read conference names won't work. So if
;;; you change it, try to work one character at a time, and when
;;; you're done, run through the mappings of all 256 characters to
;;; make sure they look OK.
;;;
308
309
;;; Make sure your MULE Emacs doesnt fuck it up for you. It did for me.
;;;
David Byers's avatar
David Byers committed
310

311
(defvar lyskom-default-collate-table
David Byers's avatar
David Byers committed
312
  "\000\001\002\003\004\005\006\007\010 \012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037 !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]~\200\201\202\203\204\205\206\207\210\211\212\213\214\215\216\217\220\221\222\223\224\225\226\227\230\231\232\233\234\235\236\237!AAAA[]ACEEEEIIIINOOOO\\OUUUYYAAAA[]ACEEEEIIIINOOOO\\OUUUYY"
313
314
315
316
317
  "String mapping characters to their collate class.

Lowercase, uppercase and other equivalents are mapped to the same class.
The class number defines a proper sorting order.")

318

David Byers's avatar
David Byers committed
319
320
321
322
323
324
(defsubst lyskom-maybe-recode-string (s &optional coding force)
  "Change the encoding of S for when multibyte characters are not supported.
Optional second argument CODING is the coding system to use. If optional
third argument FORCE is non-nil, always encode multibyte strings, otherwise
only encode when multibyte strings are not supported."
  (if (and (multibyte-string-p s) (or force (not enable-multibyte-characters)))
325
326
327
328
329
      (encode-coding-string s (or coding
                                  (and lyskom-language
                                       (lyskom-language-coding lyskom-language))
                                  'raw-text))
    s))
330

David Byers's avatar
David Byers committed
331
332
333
334
335
336
(defun lyskom-maybe-frob-completion-table (table &optional copy)
  "Recode the cars of alist TABLE to default coding system unless multibyte
characters are enabled. This function is destructive unless optional copy
is non-nil."
  (cond (enable-multibyte-characters table)
	(copy (mapcar (lambda (el)
David Byers's avatar
David Byers committed
337
			(cons (lyskom-maybe-recode-string (car el) nil t)
338
339
			      (cdr el)))
                      table))
David Byers's avatar
David Byers committed
340
	(t (lyskom-traverse el table
David Byers's avatar
David Byers committed
341
		(setcar el (lyskom-maybe-recode-string (car el) nil t)))
David Byers's avatar
David Byers committed
342
343
344
	   table)))


345
346
(defsubst lyskom-unicase-char (c)
  "Smash case and diacritical marks on c." 
347
  (if (< (char-to-int c) (length lyskom-collate-table))
David Byers's avatar
David Byers committed
348
      (aref lyskom-collate-table (char-to-int c))
349
350
351
352
    (setq c (lyskom-encode-coding-char c lyskom-server-coding-system))
    (if (and c (< (char-to-int c) (length lyskom-collate-table)))
	(aref lyskom-collate-table (char-to-int c))
      c)))
353
354
355

(defun lyskom-unicase (s)
  "Smash case and diacritical marks of all chars in s." 
356
  (lyskom-save-excursion
357
   (and lyskom-buffer (set-buffer lyskom-buffer))
358
   (let ((l (length s))
359
360
	 (s2 (string-to-vector 
              (encode-coding-string s lyskom-server-coding-system))))
361
362
363
     (while (> l 0)
       (setq l (1- l))
       (aset s2 l (lyskom-unicase-char (aref s2 l))))
364
     (concat s2))))
David Byers's avatar
David Byers committed
365

David Byers's avatar
David Byers committed
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
(defun lyskom-looking-at (s)
  "Version of looking-at that will work in Gnu Emacs 20.3"
  (save-excursion
    (let ((start (point)))
      (and (re-search-forward s nil t)
	   (eq (match-beginning 0) start)))))

;; Don't slow things down with our own looking-at unless we have to

(eval-and-compile
 (condition-case nil
     (if (and (eq emacs-major-version 20)
	      (eq emacs-minor-version 3))
	 nil
       (fset 'lyskom-looking-at (symbol-function 'looking-at)))
   (error nil)))


384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
(defun lyskom-compute-char-classes (map)
  "Find out which characters that are equivalent according to MAP.

MAP should be a collate table.

The return value is an assoc list, which characters as keys, and a
list of single-character strings as values.  Only characters that are
equivalent to at least one more character is returned in the assoc
list.

Example: if this function returns

	((97 \"A\" \"a\")
         (65 \"A\" \"a\")
	 (48 \"O\" \"o\" \"0\")
	 (111 \"O\" \"o\" \"0\")
	 (79 \"O\" \"o\" \"0\"))

it means that a and A are equivalent, and o, O and 0 are equivalent.
All other characters are unique."

  (lyskom-save-excursion
    (and lyskom-buffer (set-buffer lyskom-buffer))
    (let ((ix (length map))
	  (cls-to-strings nil)) ;assoc-list from equivalence class to
				;list of chars
      (while (> ix 0)
	(setq ix (1- ix))
	(let* ((cls (aref map ix))
	       (str (decode-coding-string (concat (vector ix))
					  lyskom-server-coding-system))
	       (elem (assoc cls cls-to-strings)))
	  (if elem
	      (rplacd elem (cons str (cdr elem)))
	    (setq cls-to-strings (cons (list cls str) cls-to-strings)))))
      (let ((res nil))
	(while cls-to-strings
	  (let ((lst (cdar cls-to-strings)))
	    (if (> (length lst) 1)
		(while lst
		  (setq res (cons (cons (string-to-char (car lst))
					(cdar cls-to-strings))
				  res))
		  (setq lst (cdr lst)))))
	  (setq cls-to-strings (cdr cls-to-strings)))
	res))))
    
David Byers's avatar
David Byers committed
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
;; Stolen from thingatpt.el
;; FIXME: We may not really need this function. Check the callers.

(defun lyskom-thing-at-point-looking-at (regexp)
  "Return non-nil if point is in or just after a match for REGEXP.
Set the match data from the earliest such match ending at or after
point."
  (save-excursion
    (let ((old-point (point)) match)
      (and (looking-at regexp)
	   (>= (match-end 0) old-point)
	   (setq match (point)))
      ;; Search back repeatedly from end of next match.
      ;; This may fail if next match ends before this match does.
      (re-search-forward regexp nil 'limit)
      (while (and (re-search-backward regexp nil t)
		  (or (> (match-beginning 0) old-point)
		      (and (looking-at regexp) ; Extend match-end past search start
			   (>= (match-end 0) old-point)
			   (setq match (point))))))
      (if (not match) nil
	(goto-char match)
	;; Back up a char at a time in case search skipped
	;; intermediate match straddling search start pos.
	(while (and (not (bobp))
		    (progn (backward-char 1) (looking-at regexp))
		    (>= (match-end 0) old-point)
		    (setq match (point))))
	(goto-char match)
	(looking-at regexp)))))

David Byers's avatar
David Byers committed
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516

;; Stolen from Gnu Emacs

(defun lyskom-truncate-string-to-width (str end-column &optional start-column padding)
  "Truncate string STR to end at column END-COLUMN.
The optional 2nd arg START-COLUMN, if non-nil, specifies
the starting column; that means to return the characters occupying
columns START-COLUMN ... END-COLUMN of STR.

The optional 3rd arg PADDING, if non-nil, specifies a padding character
to add at the end of the result if STR doesn't reach column END-COLUMN,
or if END-COLUMN comes in the middle of a character in STR.
PADDING is also added at the beginning of the result
if column START-COLUMN appears in the middle of a character in STR.

If PADDING is nil, no padding is added in these cases, so
the resulting string may be narrower than END-COLUMN."
  (or start-column
      (setq start-column 0))
  (let ((len (length str))
	(idx 0)
	(column 0)
	(head-padding "") (tail-padding "")
	ch last-column last-idx from-idx)
    (condition-case nil
	(while (< column start-column)
	  (setq ch (aref str idx)
		column (+ column (char-width ch))
		idx (1+ idx)))
      (args-out-of-range (setq idx len)))
    (if (< column start-column)
	(if padding (make-string end-column padding) "")
      (if (and padding (> column start-column))
	  (setq head-padding (make-string (- column start-column) padding)))
      (setq from-idx idx)
      (if (< end-column column)
	  (setq idx from-idx)
	(condition-case nil
	    (while (< column end-column)
	      (setq last-column column
		    last-idx idx
		    ch (aref str idx)
		    column (+ column (char-width ch))
		    idx (1+ idx)))
	  (args-out-of-range (setq idx len)))
	(if (> column end-column)
	    (setq column last-column idx last-idx))
	(if (and padding (< column end-column))
	    (setq tail-padding (make-string (- end-column column) padding))))
      (setq str (substring str from-idx idx))
      (if padding
	  (concat head-padding str tail-padding)
	str))))


517
518
519
520
521
522
(eval-and-compile
  (lyskom-xemacs-or-gnu
   (fset 'lyskom-string= (symbol-function 'string=))
   (if (< emacs-major-version 20)
       (fset 'lyskom-string= (symbol-function 'string=))
     (defun lyskom-string= (s1 s2)
523
       (string= (and s1 (if (multibyte-string-p s1)
524
525
		    s1
		  (decode-coding-string s1 (lyskom-language-coding
526
527
					    lyskom-language))))
		(and s2 (if (multibyte-string-p s2)
528
529
		    s2
		  (decode-coding-string s2 (lyskom-language-coding
530
					    lyskom-language)))))))))
531

David Byers's avatar
X    
David Byers committed
532
533
534
(defun lyskom-string-assoc (key list)
  "Return non-nil if KEY is the same string as the car of an element of LIST.
The value is actually the element of LIST whose car equals KEY."
David Byers's avatar
David Byers committed
535
  (let ((s (and key (downcase key)))
David Byers's avatar
X    
David Byers committed
536
537
        (result nil))
    (while list
538
      (when (lyskom-string= s (downcase (car (car list))))
David Byers's avatar
X    
David Byers committed
539
540
541
542
        (setq result (car list))
        (setq list nil))
      (setq list (cdr list)))
    result))
David Byers's avatar
David Byers committed
543

544
545
546
(defun lyskom-string-rassoc (key list)
  "Return non-nil if KEY is the same string as the cdr of an element of LIST.
The value is actually the element of LIST whose car equals KEY."
David Byers's avatar
David Byers committed
547
  (let ((s (and key (downcase key)))
548
549
550
551
552
553
554
555
        (result nil))
    (while list
      (when (lyskom-string= s (downcase (cdr (car list))))
        (setq result (car list))
        (setq list nil))
      (setq list (cdr list)))
    result))

David Byers's avatar
X    
David Byers committed
556
557
(defun lyskom-set-default (sym val)
  "Set the value of SYM in the LysKOM buffer to VAL."
David Byers's avatar
David Byers committed
558
  (save-excursion
David Byers's avatar
X    
David Byers committed
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
    (set-buffer (or (and (boundp 'lyskom-buffer)
                         (bufferp lyskom-buffer)
                         (buffer-live-p lyskom-buffer)
                         lyskom-buffer)
                    (current-buffer)))
    (set sym val)))

(defun lyskom-default-value (sym)
  "Get the value of SYM in the LysKOM buffer"
  (save-excursion
    (set-buffer (or (and (boundp 'lyskom-buffer)
                         (bufferp lyskom-buffer)
                         (buffer-live-p lyskom-buffer)
                         lyskom-buffer)
                    (current-buffer)))
David Byers's avatar
David Byers committed
574
575
    (symbol-value sym)))

David Byers's avatar
X    
David Byers committed
576
577
(defun lyskom-default-value-safe (sym)
  "Get the value of SYM in the LysKOM buffer"
David Byers's avatar
David Byers committed
578
  (save-excursion
David Byers's avatar
X    
David Byers committed
579
580
581
582
583
584
    (set-buffer (or (and (boundp 'lyskom-buffer)
                         (bufferp lyskom-buffer)
                         (buffer-live-p lyskom-buffer)
                         lyskom-buffer)
                    (current-buffer)))
    (and (boundp sym) (symbol-value sym))))
585

David Byers's avatar
David Byers committed
586

587
588
589
;;; ============================================================
;;; Prefix arguments

590
(defun lyskom-read-text-no-prefix-arg (prompt &optional always-read default)
591
  "Call in interactive list to read text-no.
592
593
594
595
596
597
598
If optional argument ALWAYS-READ is non-nil the user is prompted if an
explicit prefix argument was not given. The prefix argument zero
refers to the text under point. A positive prefix argument is
interpreted as a text-no, whereas a negative prefix argument will try
to find the text-no of the text `arg' messages above point from the
current kom buffer. DEFAULT specifies the default text to use. If it
is nil, the most recently read text is the default. The symbol
599
last-written means use the text most recently written. The symbol
600
601
602
last-seen-written means use the text in lyskom-last-seen-written. A
number means use that text as the default."
  (let ((default (cond ((or (null default)
David Byers's avatar
David Byers committed
603
                            (eq 0 default))
604
605
                        (lyskom-default-value 'lyskom-current-text))
                       ((numberp default) default)
606
607
608
609
610
                       ((eq default 'last-written)
                        (or (lyskom-default-value 'lyskom-last-seen-written)
                            (lyskom-default-value 'lyskom-current-text)))
                       ((eq default 'last-seen-written)
                        (or (lyskom-default-value 'lyskom-last-seen-written)
611
612
613
                            (lyskom-default-value 'lyskom-current-text))))))
    ;; If the default is *still* zero, then we really can't figure
    ;; one out, so set it to nil.
David Byers's avatar
David Byers committed
614
    (when (eq 0 default) (setq default nil))
615
616
    (cond
     ((null current-prefix-arg)
617
618
619
      (if (or always-read
              (memq lyskom-current-command kom-prompt-for-text-no)
              (null default))
620
621
622
623
624
625
          (lyskom-read-number prompt default)
        default))
     ((or (integerp current-prefix-arg)
          (eq '- current-prefix-arg))
      (let ((current-prefix-arg
             (if (eq '- current-prefix-arg) -1 current-prefix-arg)))
626
627
        (cond
	 ((> current-prefix-arg 0) current-prefix-arg)
628
	 ((zerop current-prefix-arg) (lyskom-text-at-point))
629
	 (t
630
631
632
633
634
          (save-excursion
            (backward-text (- 1 current-prefix-arg))
            (if (looking-at "\\([0-9]+\\)\\s-")
                (string-to-int (match-string 1))
              (lyskom-error (lyskom-get-string 'bad-text-no-prefix)
635
                            current-prefix-arg)))))))
636
     ((listp current-prefix-arg)
637
      (lyskom-read-number prompt default))
638
639
     (t (lyskom-error (lyskom-get-string 'bad-text-no-prefix)
                      current-prefix-arg)))))
640

641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
;;; ============================================================
;;; Set functions

(defun lyskom-subset-p (a b)
  "Return non-nil if A is a subset of B"
  (let ((result t))
    (while a
      (if (memq (car a) b)
          (setq a (cdr a))
        (setq result nil a nil)))
    result))

(defun lyskom-intersection (a b)
  "Returns as a list the intersection of list A and list B.
The order of the list a is kept."
  (if (or a b)
      (let ((list nil))
        (while a
          (if (memq (car a) b)
              (setq list (cons (car a) list)))
          (setq a (cdr a)))
        (nreverse list))))

664
665


666
667
668
669
670
671
672
673
674
675
676
;;; ======================================================================
;;; Display device management
;;;


;;; Definition of some useful functions from XEmacs

(lyskom-provide-function console-type (&optional console)
  (or window-system 'tty))

(lyskom-provide-function device-class (&optional device)
David Kågedal's avatar
David Kågedal committed
677
678
679
680
681
682
683
  (condition-case nil
      (if (x-display-grayscale-p)
	  (if (x-display-color-p)
	      'color
	    'grayscale)
	'mono)
    (error 'mono)))
684
685
686
687
688
689
690
691
692
693
694
695
696


(lyskom-provide-function frame-property (frame property &optional default)
  (or (cdr (assq property (frame-parameters frame)))
      default))


;;; XEmacs doesn't seem to have a background-mode frame property

(defun lyskom-background-mode ()
  (frame-property (selected-frame) 'background-mode 'light))


David Byers's avatar
X    
David Byers committed
697
698
699
700
701
702
703
704
705
706
707
;;; ======================================================================
;;; LysKOM Hooks
;;;

(defun lyskom-run-hook-with-args (hook &rest args)
  "Run HOOK with the specified arguments ARGS in the LysKOM buffer.
See run-hook-with-args for detailed information."
  (save-excursion (set-buffer (or (and (boundp 'lyskom-buffer)
                                       lyskom-buffer)
                                  (current-buffer)))
                  (apply 'run-hook-with-args hook args)))
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756


;;;(defun lyskom-set-variable-hook-wrapper (hook-function args)
;;;  "Wrapper for running HOOK-FUNCTION with ARGS.
;;;If HOOK returns an alist ((S1 . V1) ...), set value of symbol S1 to V1
;;;and similarly for each element.
;;;
;;;The hook may set hook-function-args to change the arguments to subsequent
;;;hook functions.
;;;
;;;Hook functions that rely on this are totally dependent on the current 
;;;implementation of all callers. If you think you want to use this feature,
;;;think again. You probably don't."
;;;  (lyskom-traverse el (apply hook args)
;;;    (set (car el) (cdr el))))
;;;
;;;
;;;(defun lyskom-run-hook-with-wrapper (hook wrapper &rest args)
;;;  "Run HOOK by calling WRAPPER for each function in the LysKOM buffer.
;;;The wrapper will be called with arguments FUNCTION and ARGS. It
;;;calls the actual hook function by applying FUNCTION to ARGS.
;;;
;;;This function emulates the built-in run-hook-with-args function.
;;;It is modeled on the XEmacs 21.2 implementation, so there may be
;;;slight discrepancies with other Emacs versions.
;;;
;;;The variable hook-function-args holds the arguments to the hook 
;;;function (the ARGS parameter for the wrapper)."
;;;  (save-excursion
;;;    (set-buffer (or (and (boundp 'lyskom-buffer) lyskom-buffer)
;;;                    (current-buffer)))
;;;    (let ((hook-function-args args))
;;;      (when (and hook (boundp hook))
;;;        (let ((val (symbol-value hook)))
;;;          (if (and (consp val) (eq (car val 'lambda)))
;;;              (funcall wrapper val args)
;;;            (while (and val (consp val))
;;;              (if (eq (car val) t)
;;;                  (let ((globals (default-value hook)))
;;;                    (if (and (consp globals) (eq (car globals 'lambda)))
;;;                        (funcall wrapper hook args)
;;;                      (while (and globals (consp globals))
;;;                        (unless (eq (car globals t))
;;;                          (funcall wrapper (car globals) args))
;;;                        (setq globals (cdr globals)))))
;;;                (funcall wrapper (car val) args)
;;;                (setq val (cdr val))))))))))

                                                     
David Byers's avatar
X    
David Byers committed
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779

(defun lyskom-add-hook (hook function &optional append)
  "Add to the value of HOOK the function FUNCTION in the LysKOM buffer.
If optional APPEND is non-nil, add at the end of HOOK."
  (save-excursion (set-buffer (or (and (boundp 'lyskom-buffer)
                                       lyskom-buffer)
                                  (current-buffer)))
                  (add-hook hook function append t)))

(defun lyskom-remove-hook (hook function)
  "From the value of HOOK remove the function FUNCTION in the LysKOM buffer."
  (save-excursion (set-buffer (or (and (boundp 'lyskom-buffer)
                                       lyskom-buffer)
                                  (current-buffer)))
                  (remove-hook hook function t)))




;;; ======================================================================
;;; Printing
;;;
;;; XEmacs princ does not insert text properties. This function is based
780
;;; on the C code for princ. 
David Byers's avatar
X    
David Byers committed
781
782
;;;

783
784
(defun lyskom-princ (object &optional stream)
  "Output the printed representation of OBJECT, any Lisp OBJECT.
785
786
787
788
No quoting characters are used; no delimiters are printed around
the contents of strings. Text properties are retained.

Output stream is STREAM, or value of standard-output, and must be a
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
buffer or a marker. Function or minibuffer streams are not supported
for strings."
  (if (not (stringp object))
      (princ object stream)
    (let ((old-point nil)
          (start-point nil)
          (old-buffer (current-buffer)))
      (unwind-protect
          (progn
            (cond ((bufferp stream) (set-buffer stream))
                  ((markerp stream) 
                   (setq old-point (point))
                   (set-buffer (marker-buffer stream))
                   (goto-char stream)
                   (setq start-point (point)))
                  ((null stream)
                   (cond ((bufferp standard-output) (set-buffer standard-output))
                         ((markerp standard-output) 
                          (setq old-point (point))
                          (set-buffer (marker-buffer standard-output))
                          (goto-char standard-output)
                          (setq start-point (point))))))

            (insert object))
        (cond ((markerp stream) 
               (set-marker stream (point))
               (if (>= old-point start-point)
                   (goto-char (+ old-point (- (point) start-point)))
                 (goto-char old-point))))
        (set-buffer old-buffer)))))
David Byers's avatar
X    
David Byers committed
819
820


821
822
823
824
825
826
827
828
829
830
831
832
833
834
;;; ======================================================================
;;; Faces
;;;

(defun lyskom-set-face-foreground (face color)
  (condition-case nil
      (set-face-foreground face color)
    (error nil)))

(defun lyskom-set-face-background (face color)
  (condition-case nil
      (set-face-background face color)
    (error nil)))

835
836
837
838
839
(defun lyskom-copy-face (old new)
  (lyskom-xemacs-or-gnu (copy-face old new nil nil nil 'remove-all)
                        (copy-face old new)))


840

David Kågedal's avatar
David Kågedal committed
841
(defun lyskom-set-face-scheme (scheme)
842
843
844
  "Set the LysKOM color and face scheme to SCHEME. Valid schemes are listed
in lyskom-face-schemes."
  (let ((tmp (assoc scheme lyskom-face-schemes)))
845
846
847
848
849
850
851
    (when (and tmp
               (fboundp 'copy-face)
               (fboundp 'lyskom-set-face-foreground)
               (fboundp 'lyskom-set-face-background))
      (mapcar 
       (function
        (lambda (spec)
852
          (lyskom-copy-face (or (elt spec 1) 'default) (elt spec 0))
853
854
855
856
857
          (if (elt spec 2)
              (lyskom-set-face-foreground (elt spec 0) (elt spec 2)))
          (if (elt spec 3)
              (lyskom-set-face-background (elt spec 0) (elt spec 3)))))
       (cdr tmp)))))
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879


(defun lyskom-face-resource (face-name attr type)
  (if (eq (lyskom-emacs-version) 'xemacs)
      ;; XEmac style
      (let ((val (x-get-resource (concat face-name ".attribute" attr)
				 (concat "Face.Attribute" attr)
				 type)))
	(cond ((eq type 'string) val)
	      ((and (eq type 'boolean) val) (if (car val) 'on 'off))
	      (t val)))
    ;; Emacs style
    (let ((val (x-get-resource (concat face-name ".attribute" attr)
			       (concat "Face.Attribute" attr))))
      (cond ((eq type 'string) val)
	    ((and val
		  (eq type 'boolean)
		  (member (downcase val) '("on" "true"))) 'on)
	    ((and val (eq type 'boolean)) 'off)
	    (t val)))))


David Byers's avatar
X    
David Byers committed
880
(defun lyskom-modify-face (what face)
David Byers's avatar
David Byers committed
881
  (condition-case nil
David Byers's avatar
X    
David Byers committed
882
883
884
885
      (funcall (intern (concat "make-face-" (symbol-name what)))
               face)
    (error nil)))

886
887
888
889
890
891
892
(defun lyskom-setup-faces ()
  "Initalize the faces in the LysKOM client.
This sets the face scheme according to `kom-default-face-scheme', and
also reads the proper X resources."
  (unless kom-default-face-scheme
    (setq kom-default-face-scheme
	  (condition-case nil
David Kågedal's avatar
David Kågedal committed
893
	      (cond ((eq (device-class) 'mono) 'monochrome)
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
		    ((eq (lyskom-background-mode) 'dark)
		     'inverse)
		    (t 'default))
	    (error 'default))))  
  (lyskom-set-face-scheme kom-default-face-scheme)
  (if (eq (console-type) 'x)
      (mapcar
       (function
	(lambda (face)
	  (let* ((face-name (symbol-name face))
		 (fg (lyskom-face-resource face-name "Foreground" 'string))
		 (bg (lyskom-face-resource face-name "Background" 'string))
		 (bl (lyskom-face-resource face-name "Bold" 'boolean))
		 (it (lyskom-face-resource face-name "Italic" 'boolean))
		 (ul (lyskom-face-resource face-name "Underline" 'boolean)))
	    (if fg (set-face-foreground face fg))
	    (if bg (set-face-background face bg))
David Byers's avatar
X    
David Byers committed
911
912
913
914
	    (if (eq bl 'on) (lyskom-modify-face 'bold face))
	    (if (eq bl 'off) (lyskom-modify-face 'unbold face))
	    (if (eq it 'on) (lyskom-modify-face 'italic face))
	    (if (eq it 'off) (lyskom-modify-face 'unitalic face))
915
916
	    (if ul (set-face-underline-p face (eq ul 'on))))))
       lyskom-faces)))
917
918


David Byers's avatar
David Byers committed
919
920
921
922
923
924
925
926
927
928
929
930
;;; ============================================================
;;; Date and time utilities

(defun lyskom-client-date-string (&optional fmt)
  "Format the current client time as a string.
The optional format string FMT specifies the format. If no format string
is supplied time-yyyy-mm-dd-hh-mm is used. The arguments to the format
string are the following: the year, the month, the day, the hour, the 
minutes, the seconds, the full name of the day of week, the abbreviated
name of the day of week."
  (let ((now (decode-time)))
    (lyskom-format (or fmt 'time-yyyy-mm-dd-hh-mm)
David Byers's avatar
David Byers committed
931
                   (elt now 5)
David Byers's avatar
David Byers committed
932
933
934
935
936
937
938
939
940
941
                   (elt now 4)
                   (elt now 3)
                   (elt now 2)
                   (elt now 1)
                   (elt now 0)
                   (elt (lyskom-get-string 'weekdays)
                        (elt now 6))
                   (elt (lyskom-get-string 'weekdays-short)
                        (elt now 6)))))

942
(defun lyskom-client-date ()
943
  "Return the current time at the client as a LysKOM time structure."
944
945
946
947
  (let ((now (decode-time)))
    (lyskom-create-time (elt now 0)     ;sec
                        (elt now 1)     ;min
                        (elt now 2)     ;hour
948
                        (elt now 3)	;mday
949
950
951
952
953
954
955
                        (elt now 4)     ;mon
                        (- (elt now 5) 1900) ;year
                        (elt now 6)     ;wday
                        0               ;yday
                        (elt now 7)
                        )))

956
957
958
959
;;; ============================================================
;;; Keymap utilities

(defun lyskom-lookup-key (keymap event &optional accept-default)
960
961
  (if (not (arrayp event))
      (setq event (vector event)))
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
  (if (null keymap)
      (and accept-default 
           (lookup-key global-map event))
    (or (lookup-key keymap event)
        (lyskom-lookup-key (keymap-parent keymap) event accept-default))))

(defun lyskom-keymap-body (keymap)
  (setq keymap (cdr keymap))
  (cond ((arrayp (car keymap)) (car keymap))
        (t keymap)))

(defun lyskom-keymap-realbinding (binding)
  (while (stringp (car-safe binding))
    (setq binding (cdr binding)))
  binding)

(defun lyskom-overlay-keymap (basemap overlay keymap &optional prefix)
  (let ((keys (make-vector (1+ (length prefix)) nil))
        (index (length prefix))
        (body nil)
        (r 0))

    (while (< r (length prefix))
      (aset keys r (aref prefix r))
      (setq r (1+ r)))

    (cond ((not (keymapp keymap)))
          ((not (keymapp overlay)))
          ((not (keymapp basemap)))

          ((setq body (lyskom-keymap-body overlay))
           (mapcar
            (function
             (lambda (element)
               (cond ((arrayp element)
                      (let ((len (length element)))
                        (setq r 0)
                        (while (< r len)
                          (aset keys index r)
                          (lyskom-overlay-keys keys (aref element r)
                                               basemap overlay keymap)
                          (setq r (1+ r)))))

                     ((consp element)
                      (when (not (eq t (car element)))
                        (aset keys index (car element))
                        (lyskom-overlay-keys keys
                                             (lyskom-keymap-realbinding
                                              (cdr element))
                                             basemap overlay keymap)))

                     (t nil))))
            body)))))


(defun lyskom-overlay-keys (keys binding basemap overlay keymap)
  (let ((base-binding (lyskom-lookup-key basemap keys nil)))

   ;; If the binding is a keymap or prefix and
   ;; the binding in the base is a keymap or prefix 
   ;; then recurse

   (cond ((and (keymapp binding)
               (keymapp base-binding))
          (lyskom-overlay-keymap basemap binding keymap keys))

   ;; If the binding is a keymap or prefix and
   ;; we are bound in the base
   ;; then don't recurse

         ((and (keymapp binding)
               base-binding) nil)

   ;; If we are not bound in the base
   ;; copy the binding

         ((and binding
               (null base-binding)) (define-key keymap keys binding)))))

1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058

;;;
;;; Stuff
;;;

(defun lyskom-return-membership-type (mt)
  "Return a text description of membership type mt"
  (let ((tmp
         (mapconcat 
          'identity
          (delete nil
                  (list (if (membership-type->invitation mt) (lyskom-get-string 'invitation-mt-type) nil)
                        (if (membership-type->passive mt) (lyskom-get-string 'passive-mt-type) nil)
                        (if (membership-type->secret mt) (lyskom-get-string 'secret-mt-type) nil)))
          ", ")))
    (if (string= tmp "") 
        tmp
      (concat "[" tmp "]"))))
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073

(defun lyskom-find-unread (conf-no)
  "Return the number of unread texts in CONF-NO.
If this function is unable to calculate the number of unread texts it will
return nil."
  (save-excursion
   (set-buffer lyskom-buffer)
   (let ((rlist (read-list->all-entries lyskom-to-do-list))
         (found nil))
     (while (and (not found) rlist)
       (when (eq conf-no (conf-stat->conf-no
                          (read-info->conf-stat (car rlist))))
         (setq found (length (cdr (read-info->text-list (car rlist))))))
       (setq rlist (cdr rlist)))
     found)))
1074

David Byers's avatar
David Byers committed
1075
(defun lyskom-prev-area (num prop &optional goto-point-min)
1076
1077
  (while (> num 0)
    (let ((where (previous-single-property-change (point) prop)))
David Byers's avatar
David Byers committed
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
      (cond (where
             (if (not (get-text-property where prop))
                 (setq where (previous-single-property-change 
                              where prop)))
             (if where
                 (goto-char where)
               (goto-char (point-min))
               (setq num 1)))
            (goto-point-min (goto-char (point-min))
                            (setq num 1))))
1088
1089
    (setq num (1- num))))

David Byers's avatar
David Byers committed
1090
(defun lyskom-next-area (num prop &optional goto-point-max)
1091
1092
1093
1094
  "Move the cursor to the next prompt in the LysKOM buffer"
  (interactive "p")
  (while (> num 0)
    (let ((where (next-single-property-change (point) prop)))
David Byers's avatar
David Byers committed
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
      (cond (where
             (if (not (get-text-property where prop))
                 (setq where (next-single-property-change where prop)))
             (if where
                 (goto-char where)
               (goto-char (point-max))
               (setq num 1)))
            (goto-point-max (goto-char (point-max))
                            (setq num 1))))
      (setq num (1- num))))
David Byers's avatar
David Byers committed
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158

;;; ============================================================
;;; Database stuff

;; Extracted from edit-text.el
;;(defun lyskom-is-supervisor (conf-stat &optional memo)
;;  "Return non-nil if lyskom-pers-no is a supervisor of CONF-STAT."
;;  (cond ((null conf-stat) nil)
;;        ((memq (conf-stat->conf-no conf-stat) memo) nil)
;;        ((eq lyskom-pers-no (conf-stat->conf-no conf-stat)) t)
;;        ((eq lyskom-pers-no (conf-stat->supervisor conf-stat)) t)
;;        ((eq 0 (conf-stat->supervisor conf-stat)) nil)
;;        ((lyskom-get-membership (conf-stat->conf-no conf-stat) t) t)
;;        ((lyskom-is-supervisor
;;          (blocking-do 'get-conf-stat (conf-stat->supervisor conf-stat))
;;          (cons (conf-stat->conf-no conf-stat) memo)))))

(defun lyskom-is-supervisor (conf-no viewer-no)
  "Return non-nil if the supervisor of CONF-NO is VIEWER-NO."
  (or (eq viewer-no conf-no)
      (lyskom-is-strictly-supervisor conf-no viewer-no)))

(defun lyskom-is-strictly-supervisor (conf-no viewer-no)
  "Return non-nil if VIEWER-NO is strictly a supervisor of CONF-NO

Cannot be called from a callback."
  (let ((collector (make-collector))
        (conf-stat nil))
    (initiate-get-conf-stat 'background 'collector-push conf-no collector)
    (lyskom-wait-queue 'background)
    (setq conf-stat (car (collector->value collector)))

    (cond ((null viewer-no) nil)
          ((eq viewer-no 0) nil)
          ((null conf-stat) nil)
          ((eq viewer-no (conf-stat->supervisor conf-stat)) t)
          ((lyskom-is-member (conf-stat->supervisor conf-stat) viewer-no) t)
          (t nil))))

(defun lyskom-is-member (conf-no pers-no &optional queue)
  "Return the membership in CONF-NO of PERS-NO
Optional argument QUEUE is the queue to send the queries on.

Cannot be called from a callback."
  (or (and (eq pers-no lyskom-pers-no)
           (lyskom-try-get-membership conf-no t))
      (let ((collector (make-collector)))
        (initiate-query-read-texts (or queue 'background)
                                   'collector-push
                                   pers-no
                                   conf-no
                                   collector)
        (lyskom-wait-queue (or queue 'background))
        (car (collector->value collector)))))
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175

(defun lyskom-text-recipients (text-stat &optional want-types)
  "Return the list of recipients for TEXT-STAT.
If WANT-TYPES is non-nil then the result is an assoc list where the 
car of each element is the recipient number and the cdr is the type."
  (let ((result nil))
    (lyskom-traverse misc (text-stat->misc-info-list text-stat)
      (when (or (eq (misc-info->type misc) 'RECPT)
                (eq (misc-info->type misc) 'CC-RECPT)
                (eq (misc-info->type misc) 'BCC-RECPT))
        (if want-types
            (setq result (cons (cons (misc-info->recipient-no misc)
                                     (misc-info->type misc))
                               result))
          (setq result (cons (misc-info->recipient-no misc)
                             result)))))
    (nreverse result)))