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1 ;;; mule-help.el --- Mule-ized Help functions -*- coding: iso-2022-7bit; -*-
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2
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3 ;; Copyright (C) 1997 by Free Software Foundation, Inc.
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4
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5 ;; Author: SL Baur <steve@xemacs.org>
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6 ;; Keywords: help, internal, mule
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7
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8 ;; This file is part of XEmacs.
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9
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10 ;; XEmacs is free software; you can redistribute it and/or modify it
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11 ;; under the terms of the GNU General Public License as published by
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12 ;; the Free Software Foundation; either version 2, or (at your option)
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13 ;; any later version.
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14
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15 ;; XEmacs is distributed in the hope that it will be useful, but
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16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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18 ;; General Public License for more details.
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19
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20 ;; You should have received a copy of the GNU General Public License
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21 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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22 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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23 ;; 02111-1307, USA.
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24
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25 ;;; Synched up with: Emacs 20.1
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26
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27 ;;; Commentary:
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28
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29 ;;
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30
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31 ;;; Code:
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32
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33 ;; TUTORIAL arg is XEmacs addition
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34 (defun help-with-tutorial (&optional arg tutorial)
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35 "Select the XEmacs learn-by-doing tutorial.
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36 If there is a tutorial version written in the language
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37 of the selected language environment, that version is used.
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38 If there's no tutorial in that language, `TUTORIAL' is selected.
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39 With arg, you are asked to select which language."
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40 (interactive "P")
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41 (let (lang filename file)
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42 (if arg
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43 (or (setq lang (read-language-name 'tutorial "Language: "))
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44 (error "No tutorial file of the specified language"))
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45 (setq lang current-language-environment))
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46 ;; The menubar buttons call this function like this:
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47 ;; (help-with-tutorial nil "tutorial.lang")
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48 (setq filename (if (and (not arg) tutorial)
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49 tutorial
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50 (or (get-language-info lang 'tutorial)
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51 (or tutorial "TUTORIAL"))))
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52 (setq file (expand-file-name (concat "~/" filename)))
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53 (delete-other-windows)
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54 (if (get-file-buffer file)
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55 (switch-to-buffer (get-file-buffer file))
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56 (switch-to-buffer (create-file-buffer file))
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57 (setq buffer-file-name file)
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58 (setq default-directory (expand-file-name "~/"))
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59 (setq buffer-auto-save-file-name nil)
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60 (let ((coding-system-for-read
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61 (get-language-info lang 'tutorial-coding-system)))
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62 (insert-file-contents (locate-data-file filename)))
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63 (goto-char (point-min))
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64 ;; The 'didactic' blank lines: Possibly insert blank lines
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65 ;; around <<nya nya nya>>, and change << >> to [ ].
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66 (if (re-search-forward "^<<.+>>" nil t)
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67 (let ((n (- (window-height (selected-window))
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68 (count-lines (point-min) (point-at-bol))
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69 6)))
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70 (if (< n 12)
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71 (progn (beginning-of-line) (kill-line))
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72 ;; Some people get confused by the large gap
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73 (delete-backward-char 2)
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74 (insert "]")
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75 (beginning-of-line)
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76 (save-excursion
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77 (delete-char 2)
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78 (insert "["))
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79 (newline (/ n 2))
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80 (next-line 1)
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81 (newline (- n (/ n 2))))))
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82 (goto-char (point-min))
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83 (set-buffer-modified-p nil))))
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84
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85
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86 (provide 'mule-help)
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87
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88 ;;; mule-help.el ends here
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