lisp/medit.el

   1 ;; Lisp interface between GNU Emacs and MEDIT package. Emacs under MDL.
   2 ;; Copyright (C) 1985 Free Software Foundation, Inc.
   3 ;; Principal author K. Shane Hartman
   4
   5 ;; This file is part of GNU Emacs.
   6
   7 ;; GNU Emacs is free software; you can redistribute it and/or modify
   8 ;; it under the terms of the GNU General Public License as published by
   9 ;; the Free Software Foundation; either version 1, or (at your option)
  10 ;; any later version.
  11
  12 ;; GNU Emacs is distributed in the hope that it will be useful,
  13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;; GNU General Public License for more details.
  16
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with GNU Emacs; see the file COPYING.  If not, write to
  19 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  20
  21
  22 ;; >> This package depends on two MDL packages: MEDIT and FORKS which
  23 ;; >> can be obtained from the public (network) library at mit-ajax.
  24
  25 (require 'mim-mode)
  26
  27 (defconst medit-zap-file (concat "/tmp/" (user-login-name) ".medit.mud")
  28   "File name for data sent to MDL by Medit.")
  29 (defconst medit-buffer "*MEDIT*"
  30   "Name of buffer in which Medit accumulates data to send to MDL.")
  31 (defconst medit-save-files t
  32   "If non-nil, Medit offers to save files on return to MDL.")
  33
  34 (defun medit-save-define ()
  35   "Mark the previous or surrounding toplevel object to be sent back to MDL."
  36   (interactive)
  37   (save-excursion
  38       (beginning-of-DEFINE)
  39       (let ((start (point)))
  40         (forward-mim-object 1)
  41         (append-to-buffer medit-buffer start (point))
  42         (goto-char start)
  43         (message (buffer-substring start (progn (end-of-line) (point)))))))
  44
  45 (defun medit-save-region (start end)
  46   "Mark the current region to be sent to back to MDL."
  47   (interactive "r")
  48   (append-to-buffer medit-buffer start end)
  49   (message "Current region saved for MDL."))
  50
  51 (defun medit-save-buffer ()
  52   "Mark the current buffer to be sent back to MDL."
  53   (interactive)
  54   (append-to-buffer medit-buffer (point-min) (point-max))
  55   (message "Current buffer saved for MDL."))
  56
  57 (defun medit-zap-define-to-mdl ()
  58   "Return to MDL with surrounding or previous toplevel MDL object."
  59   (indetarctive)
  60   (medit-save-defun)
  61   (medit-go-to-mdl))
  62
  63 (defun medit-zap-region-mdl (start end)
  64   "Return to MDL with current region."
  65   (interactive)
  66   (medit-save-region start end)
  67   (medit-go-to-mdl))
  68
  69 (defun medit-zap-buffer ()
  70   "Return to MDL with current buffer."
  71   (interactive)
  72   (medit-save-buffer)
  73   (medit-go-to-mdl))
  74
  75 (defun medit-goto-mdl ()
  76   "Return from Emacs to superior MDL, sending saved code.
  77 Optionally, offers to save changed files."
  78   (interactive)
  79   (let ((buffer (get-buffer medit-buffer)))
  80   (if buffer
  81       (save-excursion
  82         (set-buffer buffer)
  83         (if (buffer-modified-p buffer)
  84             (write-region (point-min) (point-max) medit-zap-file))
  85         (set-buffer-modified-p nil)
  86         (erase-buffer)))
  87   (if medit-save-files (save-some-buffers))
  88   ;; Note could handle parallel fork by giving argument "%xmdl".  Then
  89   ;; mdl would have to invoke with "%emacs".
  90   (suspend-emacs)))
  91
  92 (defconst medit-mode-map nil)
  93 (if (not medit-mode-map)
  94     (progn
  95       (setq medit-mode-map (copy-keymap mim-mode-map))
  96       (define-key medit-mode-map "\e\z" 'medit-save-define)
  97       (define-key medit-mode-map "\e\^z" 'medit-save-buffer)
  98       (define-key medit-mode-map "\^xz" 'medit-goto-mdl)
  99       (define-key medit-mode-map "\^xs" 'medit-zap-buffer)))
 100
 101 (defconst medit-mode-hook (and (boundp 'mim-mode-hook) mim-mode-hook) "")
 102 (setq mim-mode-hook '(lambda () (medit-mode)))
 103
 104 (defun medit-mode (&optional state)
 105   "Major mode for editing text and returning it to a superior MDL.
 106 Like Mim mode, plus these special commands:
 107 \\{medit-mode-map}"
 108   (interactive)
 109   (use-local-map medit-mode-map)
 110   (run-hooks 'medit-mode-hook)
 111   (setq major-mode 'medit-mode)
 112   (setq mode-name "Medit"))
 113
 114 (mim-mode)
 115
 116