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1 ;;!emacs
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2 ;;
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3 ;; FILE: br-start.el
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4 ;; SUMMARY: Select language and invoke OO-Browser.
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5 ;; USAGE: GNU Emacs Lisp Library
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6 ;; KEYWORDS: oop, tools
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7 ;;
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8 ;; AUTHOR: Bob Weiner
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9 ;; ORG: Motorola Inc.
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10 ;;
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11 ;; ORIG-DATE: 5-Sep-92 at 23:31:03
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12 ;; LAST-MOD: 25-Oct-95 at 01:38:41 by Bob Weiner
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13 ;;
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14 ;; Copyright (C) 1992-19945 Free Software Foundation, Inc.
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15 ;; See the file BR-COPY for license information.
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16 ;;
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17 ;; This file is part of the OO-Browser.
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18 ;;
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19 ;; DESCRIPTION:
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20 ;; DESCRIP-END.
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21
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22 ;;; ************************************************************************
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23 ;;; OO-Browser directory setting
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24 ;;; ************************************************************************
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25
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26 ;; Defines (hyperb:path-being-loaded), which is used below.
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27 ;; A Hyperbole directory, such as oobr/hypb, must either already be in
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28 ;; load-path or an explicit load of "hversion" must have been
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29 ;; done already or else the following line will fail to load hversion.
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30 ;; This is all documented in the OO-Browser installation instructions.
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31 (require 'hversion)
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32
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33 ;; Reinitialize br-directory on reload if initialization failed for any reason.
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34 (and (boundp 'br-directory) (null br-directory) (makunbound 'br-directory))
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35
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36 (defvar br-directory (hyperb:path-being-loaded)
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37 "Directory where the OO-Browser executable code is kept.
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38 It must end with a directory separator character.")
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39 (if (stringp br-directory)
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40 (setq br-directory (file-name-directory br-directory))
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41 (error
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42 "(br-start.el): OO-Browser failed to set br-directory. Try setting it manually."))
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43
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44 (if (fboundp 'member)
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45 (fset 'br-member 'member)
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46 (defun br-member (elt list)
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47 "Return non-nil if ELT is an element of LIST. Comparison done with 'equal'.
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48 The value is actually the tail of LIST whose car is ELT."
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49 (while (and list (not (equal (car list) elt)))
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50 (setq list (cdr list)))
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51 list))
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52
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53 ;;; ************************************************************************
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54 ;;; Other required Elisp libraries
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55 ;;; ************************************************************************
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56
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57 ;; Add br-directory to load-path so other OO-Browser libraries can be found.
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58 (or (br-member br-directory load-path)
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59 (setq load-path (cons br-directory load-path)))
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60
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61 (load "br-vers")
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62 (mapcar 'require '(br-init br-site))
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63
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64 ;;; ************************************************************************
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65 ;;; Public functions
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66 ;;; ************************************************************************
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67
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68 ;;; For backwards compatibility.
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69 ;;;###autoload
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70 (fset 'oobr 'oo-browser)
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71
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72 ;;;###autoload
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73 (defun oo-browser (&optional same-env-flag)
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74 "Prompt for an Environment and language over which to run the OO-Browser.
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75 Optional prefix argument SAME-ENV-FLAG means browse the current Environment,
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76 if any, without prompting."
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77 (interactive "P")
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78 (if (and same-env-flag br-env-file br-lang-prefix)
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79 (funcall (intern-soft (concat br-lang-prefix "browse")))
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80 (call-interactively 'br-env-browse)))
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81
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82 (provide 'br-start)
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