Added headers, commented out code the duplicates startup effects.

1 files changed, 85 insertions, 50 deletions

diff --git a/lisp/term/vt100.el b/lisp/term/vt100.el
index a3092ea42fa..658ab4820f9 100644
--- a/lisp/term/vt100.el
+++ b/lisp/term/vt100.el
@@ -1,53 +1,86 @@
-;;;; Define VT100 function key escape sequences in function-key-map.
-
-
-;;; CSI sequences - those that start with "\e[".
-(define-prefix-command 'vt100-CSI-prefix)
-(define-key function-key-map "\e[" 'vt100-CSI-prefix)
-
-(define-key vt100-CSI-prefix "A" [up])
-(define-key vt100-CSI-prefix "B" [down])
-(define-key vt100-CSI-prefix "C" [right])
-(define-key vt100-CSI-prefix "D" [left])
-
-(defun enable-arrow-keys ()
-  "Enable the use of the VT100 arrow keys for cursor motion.
-Because of the nature of the VT100, this unavoidably breaks
-the standard Emacs command ESC [; therefore, it is not done by default,
-but only if you give this command."
-  (interactive)
-  (global-unset-key "\e["))
-
-
-
-;;; SS3 sequences - those that start with "\eO".
-(define-prefix-command 'vt100-SS3-prefix)
-(define-key function-key-map "\eO" 'vt100-SS3-prefix)
-
-(define-key vt100-SS3-prefix "A" [up])
-(define-key vt100-SS3-prefix "B" [down])                ; down-arrow
-(define-key vt100-SS3-prefix "C" [right])               ; right-arrow
-(define-key vt100-SS3-prefix "D" [left])                ; left-arrow
-(define-key vt100-SS3-prefix "M" [kp-enter])            ; Enter
-(define-key vt100-SS3-prefix "P" [kp-f1])               ; PF1  
-(define-key vt100-SS3-prefix "Q" [kp-f2])               ; PF2  
-(define-key vt100-SS3-prefix "R" [kp-f3])               ; PF3  
-(define-key vt100-SS3-prefix "S" [kp-f4])               ; PF4  
-(define-key vt100-SS3-prefix "l" [kp-separator])        ; ,
-(define-key vt100-SS3-prefix "m" [kp-subtract])         ; -
-(define-key vt100-SS3-prefix "n" [kp-period])           ; .
-(define-key vt100-SS3-prefix "p" [kp-0])                ; 0
-(define-key vt100-SS3-prefix "q" [kp-1])                ; 1
-(define-key vt100-SS3-prefix "r" [kp-2])                ; 2
-(define-key vt100-SS3-prefix "s" [kp-3])                ; 3
-(define-key vt100-SS3-prefix "t" [kp-4])                ; 4
-(define-key vt100-SS3-prefix "u" [kp-5])                ; 5
-(define-key vt100-SS3-prefix "v" [kp-6])                ; 6
-(define-key vt100-SS3-prefix "w" [kp-7])                ; 7
-(define-key vt100-SS3-prefix "x" [kp-8])                ; 8
-(define-key vt100-SS3-prefix "y" [kp-9])                ; 9
-                                                   
-
+;;; vt100.el --- define VT100 function key sequences in function-key-map
+
+;; Author: FSF
+;; Keywords: terminals
+
+;; Copyright (C) 1989 Free Software Foundation, Inc.
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY.  No author or distributor
+;; accepts responsibility to anyone for the consequences of using it
+;; or for whether it serves any particular purpose or works at all,
+;; unless he says so in writing.  Refer to the GNU Emacs General Public
+;; License for full details.
+
+;; Everyone is granted permission to copy, modify and redistribute
+;; GNU Emacs, but only under the conditions described in the
+;; GNU Emacs General Public License.   A copy of this license is
+;; supposed to have been given to you along with GNU Emacs so you
+;; can know your rights and responsibilities.  It should be in a
+;; file named COPYING.  Among other things, the copyright notice
+;; and this notice must be preserved on all copies.
+
+;;; Commentary:
+
+;; Uses the Emacs 19 terminal initialization features --- won't work with 18.
+
+;; Handles all VT100 clones, including the Apollo terminal.  Also handles
+;; the VT200 --- its PF- and arrow- keys are different, but all those
+;; are really set up by the terminal initialization code, which mines them
+;; out of termcap.  This package is here to define the keypad comma, dash
+;; and period (which aren't in termcap's repertoire) and the function for
+;; changing from 80 to 132 columns & vv.
+
+;;; Code:
+
+;; CSI sequences - those that start with "\e[".
+;; Termcap or terminfo should set these up automatically
+;; (if (boundp 'vt100-CSI-prefix)
+;;     nil
+;;   (define-prefix-command 'vt100-CSI-prefix)
+;;   (define-key function-key-map "\e[" 'vt100-CSI-prefix)
+;; 
+;;   (define-key vt100-CSI-prefix "A" [up])
+;;   (define-key vt100-CSI-prefix "B" [down])
+;;   (define-key vt100-CSI-prefix "C" [right])
+;;   (define-key vt100-CSI-prefix "D" [left])
+;;   )
+
+;; SS3 sequences - those that start with "\eO".
+(if (boundp 'vt100-SS3-prefix)
+    nil
+  (define-prefix-command 'vt100-SS3-prefix)
+  (define-key function-key-map "\eO" 'vt100-SS3-prefix)
+
+  ;; These will typically be set up automatically by termcap or terminfo
+  ;;   (define-key vt100-SS3-prefix "A" [up]) ; up-arrow
+  ;;   (define-key vt100-SS3-prefix "B" [down]) ; down-arrow
+  ;;   (define-key vt100-SS3-prefix "C" [right]) ; right-arrow
+  ;;   (define-key vt100-SS3-prefix "D" [left]) ; left-arrow
+  ;;   (define-key vt100-SS3-prefix "M" [kp-enter]) ; Enter
+  ;;   (define-key vt100-SS3-prefix "P" [kp-f1]) ; PF1  
+  ;;   (define-key vt100-SS3-prefix "Q" [kp-f2]) ; PF2  
+  ;;   (define-key vt100-SS3-prefix "R" [kp-f3]) ; PF3  
+  ;;   (define-key vt100-SS3-prefix "S" [kp-f4]) ; PF4  
+  ;;   (define-key vt100-SS3-prefix "p" [kp-0]) ; 0
+  ;;   (define-key vt100-SS3-prefix "q" [kp-1]) ; 1
+  ;;   (define-key vt100-SS3-prefix "r" [kp-2]) ; 2
+  ;;   (define-key vt100-SS3-prefix "s" [kp-3]) ; 3
+  ;;   (define-key vt100-SS3-prefix "t" [kp-4]) ; 4
+  ;;   (define-key vt100-SS3-prefix "u" [kp-5]) ; 5
+  ;;   (define-key vt100-SS3-prefix "v" [kp-6]) ; 6
+  ;;   (define-key vt100-SS3-prefix "w" [kp-7]) ; 7
+  ;;   (define-key vt100-SS3-prefix "x" [kp-8]) ; 8
+  ;;   (define-key vt100-SS3-prefix "y" [kp-9]) ; 9
+
+  ;; Neither termcap nor terminfo will set these
+  (define-key vt100-SS3-prefix "l" [kp-separator]) ; ,
+  (define-key vt100-SS3-prefix "m" [kp-subtract]) ; -
+  (define-key vt100-SS3-prefix "n" [kp-period]) ; .
+  )
+
 ;;; Controlling the screen width.
 (defconst vt100-wide-mode (= (frame-width) 132)
   "t if vt100 is in 132-column mode.")
@@ -60,3 +93,5 @@ but only if you give this command."
           (> (prefix-numeric-value arg) 0)))
  (send-string-to-terminal (if vt100-wide-mode "\e[?3h" "\e[?3l"))
  (set-frame-width (if vt100-wide-mode 132 80)))
+
+;;; vt100.el ends here