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;;;; -*- emacs-lisp -*- Sample .emacs file for use in Com S 342
;;;; $Id: sample-.emacs,v 1.3 2005/02/22 00:42:22 leavens Exp leavens $

;;; This sets up emacs to run Scheme, makes C-h the same as DEL,
;;; and makes help be on the key M-? (i.e., ESC ?).
;;; After installing this you can type
;;;      ESC ? t
;;; for the emacs on-line tutorial.  However, when reading the tutorial,
;;; remember to replace C-h by M-? everywhere.

;;; INSTRUCTIONS: copy this into your ~/.emacs file.
;;; However, if you are an emacs user already,
;;; you should instead integrate this into your existing .emacs file.
;;; Look especially at the optional customizations following how to run scheme.
;;; See the course staff if you have questions.

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; The customization below is, we think, the best way to run Scheme locally.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;;; Files mentioned below are found in "~/emacs" and "/usr/unsup/emacs".
;;; (If you're working at home, you may need to copy some files to a
;;; directory you call "/usr/unsup/emacs" or change the following.)
;;;
(setq load-path (cons "~/emacs" (cons "/usr/unsup/emacs" load-path)))

;;; Scheme program mode

;;; Tell emacs that files that end in .ss are Chez Scheme files.
;;; There already is a mapping for the suffix .scm.
;;;
(add-to-list 'auto-mode-alist '("\\.ss$" . scheme-mode))
(add-to-list 'auto-mode-alist '("\\.def$" . scheme-mode))
(add-to-list 'auto-mode-alist '("\\.tst$" . scheme-mode))

;;; use cmuscheme instead of the standard scheme mode.
;;;
(autoload 'run-scheme "cmuscheme" "Run Scheme in an emacs buffer." t)
(autoload 'scheme-mode
	  "cmuscheme"
	  "Mode for Scheme programming and interaction"
	  t)

;;; Special behavior that I want for scheme program files
;;;
(setq scheme-mit-dialect nil)

;;; The following uses "scheme342" as the scheme interpreter
;;;
(setq scheme-program-name "sh -c scheme342")
;;; To use scm342 as the scheme interpreter uncomment the following
; (setq scheme-program-name "sh -c scm342")

;;; Customize scheme mode
;;;
(add-hook
 'scheme-mode-hook
 (function
  (lambda ()
    (define-key scheme-mode-map "\n" 'newline)
    (define-key scheme-mode-map "\r" 'newline-and-indent)
    (put 'cases 'scheme-indent-function 2)
    (put 'forall 'scheme-indent-function 1)
    (put 'has-type 'scheme-indent-function 0)
    (put 'has-type-trusted 'scheme-indent-function 0)
    (put 'defrep 'scheme-indent-function 0)
    (put 'module 'scheme-indent-function 2)

    (if window-system
	(progn
	  ;; turn on fancy coloring of scheme programs (optional)
	  (font-lock-mode)

	  ;; Modify the font-locked keywords to include some used in EOPL
	  ;; (The following is for GNU emacs 20)
	  (if (> emacs-major-version 19)
	      (progn
		(setq font-lock-keywords
		      (cons 't
			    (cons
			     '("\\((\\(->\\|cases\\|isa\\|forall\\|def\\(rep\\|type\\|ine-datatype\\)\\|provide\\|module\\|require\\|file\\|lib\\|has-type\\(\\|-trusted\\)\\)\\>\\)"
			       (1 font-lock-keyword-face))
			     (cdr font-lock-keywords))))
		(font-lock-fontify-buffer)))
	  ))

    (fset 'untyped
	  (lambda ()
	    (interactive)
	    (setq scheme-program-name "sh -c scheme342untyped")))
    (fset 'typed
	  (lambda ()
	    (interactive)
	    (setq scheme-program-name "sh -c scheme342typed")))
    )))

;;; Portable scheme debugger mode
;;;
(autoload 'psd-mode "psd" "Portable Scheme Debugger mode" t nil)
;;;
;;; uncomment the following to turn on psd-mode by default when running Scheme
;(add-hook 'inferior-scheme-mode-hook
;	  (function (lambda () (psd-mode 1))))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; The optional customizations below are generally helpful,
;;; but delete it or comment it out if you don't want it.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;;; The following disable key sequences that can cause
;;; big or unnoticed mistakes
(put 'zap-to-char 'disabled t)      ; M-z
(put 'rmail-edit-current-message 'disabled 't) 
(global-unset-key "\C-x\C-u")       ; C-x C-u (upcase-region) vs. C-x u (undo)
(global-unset-key "\C-x\C-l")       ; downcase of region can be disaster
(global-unset-key "\C-xf")          ; can use set-fill-column explicitly

;;; I don't use emacs to change directories, just to get to files
(setq find-file-run-dired nil)      ; never run dired

;;; it's safer to not allow local variable lists to take effect automatically
(setq enable-local-variables 'query)


;;; Setting new commands and key bindings (make it do what I want)

;;; Make backspace (BS) work as most people expect (thanks to Bob Glickstein)
;;;
; make BS delete characters backwards, just like DEL
(global-set-key "\C-h" 'backward-delete-char-untabify)
; put help on M-? (i.e., ESC ?)
(global-set-key "\M-?" 'help-command)

;;; Make the behavior of a selection be as in many standard apps, so you can
;;; type right over it or delete it by using backspace.
;;;
(pc-selection-mode)

;;; key bindings that are useful especially for flow control (ISN, telnet),
;;; which sometimes eats all the C-s and C-q chars,
;;; and which I can live with all the time anyway.
;;;
(global-set-key "\C-\\" 'isearch-forward)
(global-set-key "\C-^" 'quoted-insert)
(global-set-key "\M-s" 'isearch-forward-regexp)
(define-key isearch-mode-map "\C-\\" 'isearch-repeat-forward)
(define-key isearch-mode-map "\C-^" 'isearch-quote-char)

;;; The following are mostly to help Prof. Leavens when you go to his
;;; office.  You can comment them out if you want.
;;; Function key binding, the \M-O ones come from Kermit in emacs mode...
;;;
(global-set-key "\M-OP" 'help)
(global-set-key [f2] 'goto-line)
(global-set-key "\M-OQ" 'goto-line)
(global-set-key [f3] 'begin)
(global-set-key "\M-OR" 'begin)
(global-set-key "\M-OA" 'previous-line)
(global-set-key "\M-OB" 'next-line)
(global-set-key "\M-OC" 'forward-char)
(global-set-key "\M-OD" 'backward-char)

;;; Keys from a Maltron keyboard using kermit that's not in emacs mode (:-(
;;;
(global-set-key "\M-[A" 'previous-line)
(global-set-key "\M-[B" 'next-line)
(global-set-key "\M-[C" 'forward-char)
(global-set-key "\M-[D" 'backward-char)


;;; Other customizations

;;; The following is important for the Windows file system,
;;; which uses ~ at the end of a name to control long file names!
;;; I use it also under Unix, so that sharing files on Windows works...
(setq version-control t)

;;; Make ~ backup files even when using RCS or SCCS
;;;
(setq vc-make-backup-files 't)

;;; Preserve links of files when editing
;;;
(setq backup-by-copying-when-linked 't)

;;; Make files always end in a newline
;;;
(setq require-final-newline 't)

;;; Uncomment the following to turn on viper-mode if you are a vi user.
;;; This make emacs use the vi keystrokes
; (setq viper-mode t)
; (require 'viper)