This file is indexed.

/usr/share/emacs/site-lisp/SuperCollider/sclang-help.el is in supercollider-emacs 1:3.6.3~repack-5.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
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
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
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
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
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
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
;; copyright 2003 stefan kersten <steve@k-hornz.de>
;;
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License as
;; published by the Free Software Foundation; either version 2 of the
;; License, or (at your option) any later version.
;;
;; This program 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 this program; if not, write to the Free Software
;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
;; USA

(eval-when-compile
  (require 'cl)
  (require 'font-lock))

;; (require 'w3m) ;; not needed during compilation
(require 'sclang-util)
(require 'sclang-interp)
(require 'sclang-language)
(require 'sclang-mode)
(require 'sclang-vars)
(require 'sclang-minor-mode)

(defcustom sclang-help-directory "~/SuperCollider/Help"
  "*Directory where the SuperCollider help files are kept. OBSOLETE."
  :group 'sclang-interface
  :version "21.3"
  :type 'directory
  :options '(:must-match))

(defcustom sclang-help-path (list sclang-system-help-dir
				  "~/.local/share/SuperCollider/Help")
  "*List of directories where SuperCollider help files are kept."
  :group 'sclang-interface
  :version "21.4"
  :type '(repeat directory))

(defconst sclang-extension-path (list sclang-system-extension-dir
				      "~/.local/share/SuperCollider/Extensions")
  "List of SuperCollider extension directories.")

(defcustom sclang-help-fill-column fill-column
  "*Column beyond which automatic line-wrapping in RTF help files should happen."
  :group 'sclang-interface
  :version "21.3"
  :type 'integer)

(defcustom sclang-rtf-editor-program "ted"
  "*Name of an RTF editor program used to edit SuperCollider help files."
  :group 'sclang-programs
  :version "21.3"
  :type 'string)

(defcustom sclang-html-editor-program "html"
  "*Name of an HTML editor program used to edit SuperCollider help files."
  :group 'sclang-programs
  :version "21.3"
  :type 'string)

;; dynamically change certain html-tags when displaying in w3m-browser:

(defcustom sclang-help-filters
  '(("p\\.p\\([0-9]+\\)" . "#p\\1")
    ("<p class=\"\\(.*\\)\">\\(.*\\)</p>" . "<div id=\"\\1\">\\2</div>"))
  "list of pairs of (regexp . filter) defining html-tags to be replaced by the function sclang-help-substitute-for-filters"
  :group 'sclang-interface
  :type '(repeat (cons (string :tag "match") (string :tag "replacement"))))

(defun sclang-help-substitute-for-filters (&rest args)
  "substitute various tags in SCs html-docs"
  (mapcar #'(lambda (filter)
	      (let ((regexp (car filter))
		    (to-string (cdr filter)))
		(goto-char (point-min))
		(while (re-search-forward regexp nil t)
		  (replace-match to-string nil nil))))
	  sclang-help-filters))

;; w3m's content-filtering system
(setq w3m-use-filter t)

(eval-after-load "w3m-filter"
  '(add-to-list 'w3m-filter-rules
		;; run on all files read by w3m...
                '(".*" sclang-help-substitute-for-filters)))


(defvar sclang-help-topic-alist nil
  "Alist mapping help topics to file names.")

(defvar sclang-help-topic-history nil
  "List of recently invoked help topics.")
;; (defvar sclang-help-topic-ring-length 32)
;; (defvar sclang-help-topic-ring (make-ring sclang-help-topic-ring-length))

(defconst sclang-special-help-topics
  '(("/" . "division")
    ("-" . "subtraction"))
  "Alist of help topics with transcoded filenames.")

(defvar sclang-help-file nil)
(defvar sclang-current-help-file nil)
(make-variable-buffer-local 'sclang-help-file)

(defconst sclang-help-file-regexp
  "\\(\\(\\(\\.help\\)?\\.\\(rtf\\|scd\\|html\\|htm\\)\\)\\|\\(\\.help\\.sc\\.html\\.htm\\)\\|\\.rtfd/TXT\\.rtf\\.html\\.htm\\)$"
  "Regular expression matching help files.")

;; =====================================================================
;; utilities
;; =====================================================================

(defun sclang-get-help-file (topic)
  (let ((topic (or (cdr (assoc topic sclang-special-help-topics)) topic)))
    (cdr (assoc topic sclang-help-topic-alist))))

(defun sclang-get-help-topic (file)
  (let ((topic (car (rassoc file sclang-help-topic-alist))))
    (or (car (rassoc topic sclang-special-help-topics)) topic)))

(defun sclang-help-buffer-name (topic)
  (sclang-make-buffer-name (concat "Help:" topic)))

(defun sclang-rtf-file-p (file)
  (let ((case-fold-search t))
    (string-match ".*\\.rtf$" file)))

;; ========= ADDITION for HTML help files
(defun sclang-html-file-p (file)
   (let ((case-fold-search t))
     (string-match ".*\\.html?$" file)))

(defun sclang-sc-file-p (file)
  (let ((case-fold-search t))
    (string-match ".*\\.sc$" file)))

(defun sclang-scd-file-p (file)
  (let ((case-fold-search t))
    (string-match ".*\\.scd$" file)))

(defun sclang-help-file-p (file)
  (string-match sclang-help-file-regexp file))

(defun sclang-help-topic-name (file)
  (if (string-match sclang-help-file-regexp file)
      (cons (file-name-nondirectory (replace-match "" nil nil file 1))
	    file)))

;; =====================================================================
;; rtf parsing
;; =====================================================================

(defconst sclang-rtf-face-change-token "\0")

(defun sclang-fill-rtf-syntax-table (table)
  ;; character quote
  (modify-syntax-entry ?\\ "/" table)
  (modify-syntax-entry ?\" "." table)
  (modify-syntax-entry ?\{ "(" table)
  (modify-syntax-entry ?\} ")" table)
  (modify-syntax-entry ?\( "." table)
  (modify-syntax-entry ?\) "." table)
  (modify-syntax-entry ?\[ "." table)
  (modify-syntax-entry ?\] "." table)
  table)

(defvar sclang-rtf-syntax-table (sclang-fill-rtf-syntax-table (make-syntax-table))
  "Syntax table used for RTF parsing.")

(defvar sclang-rtf-font-map '((Helvetica . variable-pitch)
			      (Helvetica-Bold . variable-pitch)
			      (Monaco . nil)))

(defstruct sclang-rtf-state
  output font-table font face pos)

(macrolet ((rtf-p (pos) `(plist-get (text-properties-at ,pos) 'rtf-p)))
  (defun sclang-rtf-p (pos) (rtf-p pos))
  (defun sclang-code-p (pos) (not (rtf-p pos))))

(defmacro with-sclang-rtf-state-output (state &rest body)
  `(with-current-buffer (sclang-rtf-state-output ,state)
     ,@body))

(defmacro sclang-rtf-state-add-font (state font-id font-name)
  `(push (cons ,font-id (intern ,font-name)) (sclang-rtf-state-font-table ,state)))

(defmacro sclang-rtf-state-apply (state)
  (let ((pos (gensym))
	(font (gensym))
	(face (gensym)))
    `(with-current-buffer (sclang-rtf-state-output ,state)
       (let ((,pos (or (sclang-rtf-state-pos ,state) (point-min)))
	     (,font (cdr (assq
			  (cdr (assoc
				(sclang-rtf-state-font ,state)
				(sclang-rtf-state-font-table ,state)))
			  sclang-rtf-font-map)))
	     (,face (sclang-rtf-state-face ,state)))
	 (when (> (point) ,pos)
	   (if ,font
	       (add-text-properties
		,pos (point)
		(list 'rtf-p t 'rtf-face (append (list ,font) ,face))))
	   (setf (sclang-rtf-state-pos ,state) (point)))))))

(defmacro sclang-rtf-state-set-font (state font)
  `(progn
     (sclang-rtf-state-apply ,state)
     (setf (sclang-rtf-state-font ,state) ,font)))

(defmacro sclang-rtf-state-push-face (state face)
  (let ((list (gensym)))
    `(let ((,list (sclang-rtf-state-face state)))
       (sclang-rtf-state-apply ,state)
       (unless (memq ,face ,list)
	 (setf (sclang-rtf-state-face ,state)
	       (append ,list (list ,face)))))))

(defmacro sclang-rtf-state-pop-face (state face)
  (let ((list (gensym)))
    `(let* ((,list (sclang-rtf-state-face ,state)))
       (sclang-rtf-state-apply ,state)
       (setf (sclang-rtf-state-face ,state) (delq ,face ,list)))))

(defun sclang-parse-rtf (state)
  (while (not (eobp))
    (cond ((looking-at "{")
	   ;; container
	   (let ((beg (point)))
	     (with-syntax-table sclang-rtf-syntax-table
	       (forward-list 1))
	     (save-excursion
	       (save-restriction
		 (narrow-to-region (1+ beg) (1- (point)))
		 (goto-char (point-min))
		 (sclang-parse-rtf-container state)
		 (widen)))))
	  ((or (looking-at "\\\\\\([{}\\\n]\\)")
	       (looking-at "\\\\\\([^\\ \n]+\\) ?"))
	   ;; control
	   (let ((end (match-end 0)))
	     (sclang-parse-rtf-control state (match-string 1))
	     (goto-char end)))
	  ((looking-at "\\([^{\\\n]+\\)")
	   ;; normal text
	   (let ((end (match-end 0))
		 (match (match-string 1)))
	     (with-sclang-rtf-state-output state (insert match))
	     (goto-char end)))
	  (t
	   ;; never reached (?)
	   (forward-char 1)))))

(defun sclang-parse-rtf-container (state)
  (cond ((looking-at "\\\\rtf1")		; document
	 (goto-char (match-end 0))
	 (sclang-parse-rtf state))
	((looking-at "\\\\fonttbl")		; font table
	 (goto-char (match-end 0))
	 (while (looking-at "\\\\\\(f[0-9]+\\)[^ ]* \\([^;]*\\);[^\\]*")
	   (sclang-rtf-state-add-font state (match-string 1) (match-string 2))
	   (goto-char (match-end 0))))
	((looking-at "{\\\\NeXTGraphic \\([^\\]+\\.[a-z]+\\)") ; inline graphic
	 (let* ((file (match-string 1))
		(image (and file (create-image (expand-file-name file)))))
	   (with-sclang-rtf-state-output
	    state
	    (if image
		(insert-image image)
	      (sclang-rtf-state-push-face state 'italic)
	      (insert file)
	      (sclang-rtf-state-pop-face state 'italic)))))
	))

(defun sclang-parse-rtf-control (state ctrl)
  (let ((char (aref ctrl 0)))
    (cond ((memq char '(?{ ?} ?\\))
	   (with-sclang-rtf-state-output state (insert char)))
	  ((or (eq char ?\n)
	       (string= ctrl "par"))
	   (sclang-rtf-state-apply state)
	   (with-sclang-rtf-state-output
	    state
	    (when (sclang-rtf-p (line-beginning-position))
	      (fill-region (line-beginning-position) (line-end-position)
			   t t))
	      (insert ?\n)))
	  ((string= ctrl "tab")
	   (with-sclang-rtf-state-output state (insert ?\t)))
	  ((string= ctrl "b")
	   (sclang-rtf-state-push-face state 'bold))
	  ((string= ctrl "b0")
	   (sclang-rtf-state-pop-face state 'bold))
	  ((string-match "^f[0-9]+$" ctrl)
	   (sclang-rtf-state-set-font state ctrl))
	  )))

(defun sclang-convert-rtf-buffer (output)
  (let ((case-fold-search nil)
	(fill-column sclang-help-fill-column))
    (save-excursion
      (goto-char (point-min))
      (when (looking-at "{\\\\rtf1")
	(let ((state (make-sclang-rtf-state)))
	  (setf (sclang-rtf-state-output state) output)
	  (sclang-parse-rtf state)
	  (sclang-rtf-state-apply state))))))

;; =====================================================================
;; help mode
;; =====================================================================

(defun sclang-fill-help-syntax-table (table)
  ;; make ?- be part of symbols for selection and sclang-symbol-at-point
  (modify-syntax-entry ?- "_" table))

(defun sclang-fill-help-mode-map (map)
  (define-key map "\C-c}" 'bury-buffer)
  (define-key map "\C-c\C-v" 'sclang-edit-help-file))

(defmacro sclang-help-mode-limit-point-to-code (&rest body)
  (let ((min (gensym))
	(max (gensym))
	(res (gensym)))
    `(if (and (sclang-code-p (point))
	      (not (or (bobp) (eobp)))
	      (sclang-code-p (1- (point)))
	      (sclang-code-p (1+ (point))))
	 (let ((,min (previous-single-property-change (point) 'rtf-p (current-buffer) (point-min)))
	       (,max (next-single-property-change (point) 'rtf-p (current-buffer) (point-max))))
	   (let ((,res (progn ,@body)))
	     (cond ((< (point) ,min) (goto-char ,min) nil)
		   ((> (point) ,max) (goto-char ,max) nil)
		   (t ,res)))))))

(defun sclang-help-mode-beginning-of-defun (&optional arg)
  (interactive "p")
  (sclang-help-mode-limit-point-to-code (sclang-beginning-of-defun arg)))

(defun sclang-help-mode-end-of-defun (&optional arg)
  (interactive "p")
  (sclang-help-mode-limit-point-to-code (sclang-end-of-defun arg)))

(defun sclang-help-mode-fontify-region (start end loudly)
  (flet ((fontify-code
	  (start end loudly)
	  (funcall 'font-lock-default-fontify-region start end loudly))
	 (fontify-non-code
	  (start end loudly)
	  (while (< start end)
	    (let ((value (plist-get (text-properties-at start) 'rtf-face))
		  (end (next-single-property-change start 'rtf-face (current-buffer) end)))
		(add-text-properties start end (list 'face (append '(variable-pitch) (list value))))
		(setq start end)))))
    (let ((modified (buffer-modified-p)) (buffer-undo-list t)
	  (inhibit-read-only t) (inhibit-point-motion-hooks t)
	  (inhibit-modification-hooks t)
	  deactivate-mark buffer-file-name buffer-file-truename
	  (pos start))
      (unwind-protect
	  (while (< pos end)
	    (let ((end (next-single-property-change pos 'rtf-p (current-buffer) end)))
	      (if (sclang-rtf-p pos)
		  (fontify-non-code pos end loudly)
		(fontify-code pos end loudly))
	      (setq pos end)))
	(when (and (not modified) (buffer-modified-p))
	  (set-buffer-modified-p nil))))))


(defun sclang-help-mode-indent-line ()
  (if (sclang-code-p (point))
      (sclang-indent-line)
    (insert "\t")))

(define-derived-mode sclang-help-mode sclang-mode "SCLangHelp"
  "Major mode for displaying SuperCollider help files.
\\{sclang-help-mode-map}"
  (let ((file (or (buffer-file-name)
		  (and (boundp 'sclang-current-help-file)
		       sclang-current-help-file))))
    (when file
      (set-visited-file-name nil)
      (setq buffer-auto-save-file-name nil)
      (save-excursion
	(when (sclang-rtf-file-p file)
	  (let ((tmp-buffer (generate-new-buffer " *RTF*"))
		(modified-p (buffer-modified-p)))
	    (unwind-protect
		(progn
		  (sclang-convert-rtf-buffer tmp-buffer)
		  (toggle-read-only 0)
		  (erase-buffer)
		  (insert-buffer-substring tmp-buffer))
	      (and (buffer-modified-p) (not modified-p) (set-buffer-modified-p nil))
	      (kill-buffer tmp-buffer))))))
    (set (make-local-variable 'sclang-help-file) file)
    (setq font-lock-defaults
	  (append font-lock-defaults
		  '((font-lock-fontify-region-function . sclang-help-mode-fontify-region))))
    (set (make-local-variable 'beginning-of-defun-function) 'sclang-help-mode-beginning-of-defun)
    (set (make-local-variable 'indent-line-function) 'sclang-help-mode-indent-line)
    ))

;; =====================================================================
;; help file access
;; =====================================================================

(defun sclang-skip-help-directory-p (path)
  "Answer t if PATH should be skipped during help file indexing."
  (let ((directory (file-name-nondirectory path)))
    (reduce (lambda (a b) (or a b))
	    (mapcar (lambda (regexp) (string-match regexp directory))
		    '("^\.$" "^\.\.$" "^CVS$" "^\.svn$" "^_darcs$")))))

(defun sclang-filter-help-directories (list)
  "Remove paths to be skipped from LIST of directories."
  (remove-if (lambda (x)
	       (or (not (file-directory-p x))
		   (sclang-skip-help-directory-p x)))
	     list))

(defun sclang-directory-files-save (directory &optional full match nosort)
  "Return a list of names of files in DIRECTORY, or nil on error."
  (condition-case nil
      (directory-files directory full match nosort)
    (error nil)))

;; (defun sclang-extension-help-directories ()
;;   "Build a list of help directories for extensions."
;;   (flet ((flatten (seq)
;; 		  (if (null seq)
;; 		      seq
;; 		    (if (listp seq)
;; 			(reduce 'append (mapcar #'flatten seq))
;; 		      (list seq)))))
;;     (flatten
;;      (mapcar
;;       (lambda (dir)
;; 	(mapcar
;; 	 (lambda (dir)
;; 	   (remove-if-not
;; 	    'file-directory-p
;; 	    (sclang-directory-files-save dir t "^[Hh][Ee][Ll][Pp]$" t)))
;; 	 (sclang-filter-help-directories (sclang-directory-files-save dir t))))
;;       sclang-extension-path))))

;; (defun sclang-help-directories ()
;;   "Answer list of help directories to be indexed."
;;   (append sclang-help-path (sclang-extension-help-directories)))

(defun sclang-help-directories ()
  "Answer list of help directories to be indexed."
  (append sclang-help-path sclang-extension-path))

(defun sclang-make-help-topic-alist (dirs result)
  "Build a help topic alist from directories in DIRS, with initial RESULT."
  (if dirs
      (let* ((files (sclang-directory-files-save (car dirs) t))
	     (topics (remove-if 'null (mapcar 'sclang-help-topic-name files)))
	     (new-dirs	(sclang-filter-help-directories files)))
	(sclang-make-help-topic-alist
	 (append new-dirs (cdr dirs))
	 (append topics result)))
    (sort result (lambda (a b) (string< (car a) (car b))))))

(defun sclang-index-help-topics ()
  "Build an index of help topics searching in the various help file locations."
  (interactive)
  (setq sclang-help-topic-alist nil)
  (let ((case-fold-search nil)
	(max-specpdl-size 10000)
	(max-lisp-eval-depth 10000))
    (sclang-message "Indexing help topics ...")
    (setq sclang-help-topic-alist
	  (sclang-make-help-topic-alist (sclang-help-directories) nil))
    (sclang-message "Indexing help topics ... Done")))

(defun sclang-edit-html-help-file ()
  "Edit the help file associated with the current buffer.
Switches w3m to edit mode (actually HTML mode)."
  (interactive)
  (w3m-edit-current-url)
  )

(defun sclang-edit-help-code ()
  "Edit the help file to make code variations.
Switches to text mode with sclang-minor-mode."
  (interactive)
  (w3m-copy-buffer)
;;  (text-mode)
  (sclang-mode)
  (toggle-read-only)
  (rename-buffer "*SC_Help:CodeEdit*")
  )


(defun sclang-edit-help-file ()
  "Edit the help file associated with the current buffer.
Either visit file internally (.sc) or start external editor (.rtf)."
  (interactive)
  (if (and (boundp 'sclang-help-file) sclang-help-file)
      (let ((file sclang-help-file))
	(if (file-exists-p file)
	    (if (sclang-rtf-file-p file)
		(start-process (sclang-make-buffer-name (format "HelpEditor:%s" file))
			       nil sclang-rtf-editor-program file)
	      (find-file file))
	  (if (sclang-html-file-p file)
	      (w3m-edit-current-url)
	   ;; (find-file file)
	   )
	  (sclang-message "Help file not found")))
    (sclang-message "Buffer has no associated help file")))

(defun sclang-help-topic-at-point ()
  "Answer the help topic at point, or nil if not found."
  (save-excursion
    (with-syntax-table sclang-help-mode-syntax-table
      (let (beg end)
	(skip-syntax-backward "w_")
	(setq beg (point))
	(skip-syntax-forward "w_")
	(setq end (point))
	(goto-char beg)
	(car (assoc (buffer-substring-no-properties beg end)
		    sclang-help-topic-alist))))))

(defun sclang-goto-help-browser ()
  "Switch to the *w3m* buffer to browse help files"
  (interactive)
  (let* ((buffer-name "*w3m*")
	 (buffer (get-buffer buffer-name)))
    (if buffer
      (switch-to-buffer buffer)
      ;; else
      (let* ((buffer-name "*SC_Help:w3m*")
	     (buffer2 (get-buffer buffer-name)))
	(if buffer2
	    (switch-to-buffer buffer2)
	  ;; else
	  (sclang-find-help "Help")
	  )
	)
      )
    (if buffer
	(with-current-buffer buffer
	  (rename-buffer "*SC_Help:w3m*")
	  (sclang-help-minor-mode)
	  ;;(setq buffer-read-only false)
	  )
      )
;    (if buffer
;
;      )
    )
  )

(defun sclang-find-help (topic)
  (interactive
   (list
    (let ((topic (or (and mark-active (buffer-substring-no-properties (region-beginning) (region-end)))
                     (sclang-help-topic-at-point)
                     "Help")))
      (completing-read (format "Help topic%s: " (if (sclang-get-help-file topic)
                                                    (format " (default %s)" topic) ""))
                       sclang-help-topic-alist nil t nil 'sclang-help-topic-history topic))))
  (let ((file (sclang-get-help-file topic)))
    (if file
        (if (file-exists-p file)
            (let* ((buffer-name (sclang-help-buffer-name topic))
                   (buffer (get-buffer buffer-name)))
              (unless buffer
                (if (sclang-html-file-p file)
                    (w3m-find-file file)
                  ;;  (sclang-goto-help-browser)
                  ;; not a sclang-html file
                  (setq buffer (get-buffer-create buffer-name))
                  (with-current-buffer buffer
                    (insert-file-contents file)
                    (let ((sclang-current-help-file file)
                          (default-directory (file-name-directory file)))
                      (sclang-help-mode))
                    (set-buffer-modified-p nil)))
                (switch-to-buffer buffer))
              (if (sclang-html-file-p file)
                  (sclang-goto-help-browser))
              )
          (sclang-message "Help file not found") nil)
      (sclang-message "No help for \"%s\"" topic) nil)))


(defun sclang-open-help-gui ()
  "Open SCDoc Help Browser"
  (interactive)
  (sclang-eval-string (sclang-format "Help.gui"))
  )

(defvar sclang-scdoc-topics (make-hash-table :size 16385)
  "List of all scdoc topics.")

(sclang-set-command-handler
 'helpSymbols
 (lambda (list-of-symbols)
   (mapcar (lambda (arg)
             (puthash arg nil sclang-scdoc-topics))
           list-of-symbols)
   ))

(defun sclang-find-help-in-gui (topic)
  "Search for topic in SCDoc Help Browser"
  (interactive
   (list
    (let ((topic (sclang-symbol-at-point)))
      (completing-read (format "Help topic%s: " (if topic
                                                    (format " (default %s)" topic)
                                                  ""))
                       sclang-scdoc-topics nil nil nil 'sclang-help-topic-history topic)))
   )
  (if topic
      (sclang-eval-string (sclang-format "HelpBrowser.openHelpFor(%o)" topic))
    (sclang-eval-string (sclang-format "Help.gui"))
    )
  )


;; =====================================================================
;; module setup
;; =====================================================================

(add-hook 'sclang-library-startup-hook
          (lambda ()
            (sclang-perform-command 'helpSymbols)
            (condition-case nil
                (sclang-index-help-topics)
              (error nil))))

(add-hook 'sclang-library-shutdown-hook
          (lambda ()
            (clrhash sclang-scdoc-topics)))

(add-to-list 'auto-mode-alist '("\\.rtf$" . sclang-help-mode))
;; ========= ADDITION for HTML help files?? ============
;; (add-to-list 'auto-mode-alist '("\\.html$" . sclang-help-mode))
;; (setq mm-text-html-renderer 'w3m)
;;  (setq mm-inline-text-html-with-images t)
;;  (setq mm-inline-text-html-with-w3m-keymap nil)
;; =====================================================
(sclang-fill-help-syntax-table sclang-help-mode-syntax-table)
(sclang-fill-help-mode-map sclang-help-mode-map)

(provide 'sclang-help)

;; EOF