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;;; mule-help.el --- Mule-ized Help functions
;; Copyright (C) 1997 by Free Software Foundation, Inc.
;; Author: SL Baur <steve@xemacs.org>
;; Keywords: help, internal, mule
;; This file is part of XEmacs.
;; XEmacs 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, or (at your option)
;; any later version.
;; XEmacs 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 XEmacs; see the file COPYING. If not, write to the Free
;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
;; 02111-1307, USA.
;;; Synched up with: Emacs 20.1
;;; Commentary:
;;
;;; Code:
;; TUTORIAL arg is XEmacs addition
(defun help-with-tutorial (&optional arg tutorial)
"Select the XEmacs learn-by-doing tutorial.
If there is a tutorial version written in the language
of the selected language environment, that version is used.
If there's no tutorial in that language, `TUTORIAL' is selected.
With arg, you are asked to select which language."
(interactive "P")
(let (lang filename file)
(if arg
(or (setq lang (read-language-name 'tutorial "Language: "))
(error "No tutorial file of the specified language"))
(setq lang current-language-environment))
;; The menubar buttons call this function like this:
;; (help-with-tutorial nil "tutorial.lang")
(setq filename (if (and (not arg) tutorial)
tutorial
(or (get-language-info lang 'tutorial)
(or tutorial "TUTORIAL"))))
(setq file (expand-file-name (concat "~/" filename)))
(delete-other-windows)
(if (get-file-buffer file)
(switch-to-buffer (get-file-buffer file))
(switch-to-buffer (create-file-buffer file))
(setq buffer-file-name file)
(setq default-directory (expand-file-name "~/"))
(setq buffer-auto-save-file-name nil)
(let ((coding-system-for-read
(get-language-info lang 'tutorial-coding-system)))
(insert-file-contents (locate-data-file filename)))
(goto-char (point-min))
;; The 'didactic' blank lines: Possibly insert blank lines
;; around <<nya nya nya>>, and change << >> to [ ].
(if (re-search-forward "^<<.+>>" nil t)
(let ((n (- (window-height (selected-window))
(count-lines (point-min) (point-at-bol))
6)))
(if (< n 12)
(progn (beginning-of-line) (kill-line))
;; Some people get confused by the large gap
(delete-backward-char 2)
(insert "]")
(beginning-of-line)
(save-excursion
(delete-char 2)
(insert "["))
(newline (/ n 2))
(next-line 1)
(newline (- n (/ n 2))))))
(goto-char (point-min))
(set-buffer-modified-p nil))))
(provide 'mule-help)
;;; mule-help.el ends here
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