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[emacs.git] / lisp / medit.el
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1 ;;; medit.el --- front-end to the MEDIT package for editing MDL
3 ;; Copyright (C) 1985 Free Software Foundation, Inc.
5 ;; Author: K. Shane Hartman
6 ;; Maintainer: FSF
7 ;; Keywords: languages
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software; you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; any later version.
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to
23 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 ;;; Commentary:
27 ;; >> This package depends on two MDL packages: MEDIT and FORKS which
28 ;; >> can be obtained from the public (network) library at mit-ajax.
30 ;;; Code:
32 (require 'mim-mode)
34 (defconst medit-zap-file (concat "/tmp/" (user-login-name) ".medit.mud")
35 "File name for data sent to MDL by Medit.")
36 (defconst medit-buffer "*MEDIT*"
37 "Name of buffer in which Medit accumulates data to send to MDL.")
38 (defconst medit-save-files t
39 "If non-nil, Medit offers to save files on return to MDL.")
41 (defun medit-save-define ()
42 "Mark the previous or surrounding toplevel object to be sent back to MDL."
43 (interactive)
44 (save-excursion
45 (beginning-of-DEFINE)
46 (let ((start (point)))
47 (forward-mim-object 1)
48 (append-to-buffer medit-buffer start (point))
49 (goto-char start)
50 (message "%s" (buffer-substring start (progn (end-of-line) (point)))))))
52 (defun medit-save-region (start end)
53 "Mark the current region to be sent to back to MDL."
54 (interactive "r")
55 (append-to-buffer medit-buffer start end)
56 (message "Current region saved for MDL."))
58 (defun medit-save-buffer ()
59 "Mark the current buffer to be sent back to MDL."
60 (interactive)
61 (append-to-buffer medit-buffer (point-min) (point-max))
62 (message "Current buffer saved for MDL."))
64 (defun medit-zap-define-to-mdl ()
65 "Return to MDL with surrounding or previous toplevel MDL object."
66 (interactive)
67 (medit-save-define)
68 (medit-goto-mdl))
70 (defun medit-zap-region-mdl (start end)
71 "Return to MDL with current region."
72 (interactive)
73 (medit-save-region start end)
74 (medit-goto-mdl))
76 (defun medit-zap-buffer ()
77 "Return to MDL with current buffer."
78 (interactive)
79 (medit-save-buffer)
80 (medit-goto-mdl))
82 (defun medit-goto-mdl ()
83 "Return from Emacs to superior MDL, sending saved code.
84 Optionally, offers to save changed files."
85 (interactive)
86 (let ((buffer (get-buffer medit-buffer)))
87 (if buffer
88 (save-excursion
89 (set-buffer buffer)
90 (if (buffer-modified-p buffer)
91 (write-region (point-min) (point-max) medit-zap-file))
92 (set-buffer-modified-p nil)
93 (erase-buffer)))
94 (if medit-save-files (save-some-buffers))
95 ;; Note could handle parallel fork by giving argument "%xmdl". Then
96 ;; mdl would have to invoke with "%emacs".
97 (suspend-emacs)))
99 (defconst medit-mode-map nil)
100 (if (not medit-mode-map)
101 (progn
102 (setq medit-mode-map (copy-keymap mim-mode-map))
103 (define-key medit-mode-map "\e\z" 'medit-save-define)
104 (define-key medit-mode-map "\e\^z" 'medit-save-buffer)
105 (define-key medit-mode-map "\^xz" 'medit-goto-mdl)
106 (define-key medit-mode-map "\^xs" 'medit-zap-buffer)))
108 (defconst medit-mode-hook (and (boundp 'mim-mode-hook) mim-mode-hook) "")
109 (setq mim-mode-hook '(lambda () (medit-mode)))
111 (defun medit-mode (&optional state)
112 "Major mode for editing text and returning it to a superior MDL.
113 Like Mim mode, plus these special commands:
114 \\{medit-mode-map}"
115 (interactive)
116 (use-local-map medit-mode-map)
117 (run-hooks 'medit-mode-hook)
118 (setq major-mode 'medit-mode)
119 (setq mode-name "Medit"))
121 (mim-mode)
123 ;;; medit.el ends here