stk/Lib/help.stk

;;;;
;;;; Help management
;;;;
;;;; Copyright <20> 1993-1998 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
;;;; 
;;;; Permission to use, copy, and/or distribute this software and its
;;;; documentation for any purpose and without fee is hereby granted, provided
;;;; that both the above copyright notice and this permission notice appear in
;;;; all copies and derived works.  Fees for distribution or use of this
;;;; software or derived works may only be charged with express written
;;;; permission of the copyright holder.  
;;;; This software is provided ``as is'' without express or implied warranty.
;;;;
;;;;           Author: Erick Gallesio [eg@unice.fr]
;;;;    Creation date: 14-Sep-1993 13:30
;;;; Last file update: 28-May-1998 19:10
;;;;

(require "www-browser")

(select-module STk)

(define (STk:show-help-file name)
  ;; Show the file (after having found the Help directory)
  (let loop ((l *help-path*))
    (if (null? l)
	(error "Cannot find help file ~S" name)
	(let* ((f  (string-append (car l) "/" name))
	       (fd (open-file f "r")))
	  (catch (close-port fd))
	  (if fd
	      (www:browser :url f)
	      (loop (cdr l)))))))

(define (help . arg)
  (if (null? arg)
      (STk:show-help-file "STk-hlp.html")
      (STk:show-help-file (format #f "~A.n.html" (car arg))))
  #f)

(provide "help")