Use define-minor-mode where applicable.

* mh-show.el (mh-showing-mode): Move function to mh-e.el.
* mh-e.el (mh-showing-mode):
* url-dired.el (url-dired-minor-mode):
* org-table.el (orgtbl-mode):
* view.el (view-mode):
* type-break.el (type-break-query-mode)
(type-break-mode-line-message-mode):
* textmodes/reftex.el (reftex-mode):
* term/vt100.el (vt100-wide-mode):
* tar-mode.el (tar-subfile-mode):
* savehist.el (savehist-mode):
* ibuf-ext.el (ibuffer-auto-mode):
* composite.el (auto-composition-mode):
* progmodes/vhdl-mode.el (vhdl-electric-mode, vhdl-stutter-mode):
Use define-minor-mode.
(vhdl-mode): Use static mode-line format.
(vhdl-mode-line-update): Delete.
(vhdl-create-mode-menu, vhdl-activate-customizations)
(vhdl-hs-minor-mode): Don't bother calling it.

1 files changed, 4 insertions, 10 deletions

diff --git a/lisp/term/vt100.el b/lisp/term/vt100.el
index d0560702ac0..017c976ed51 100644
--- a/lisp/term/vt100.el
+++ b/lisp/term/vt100.el
@@ -41,19 +41,13 @@
   (tty-run-terminal-initialization (selected-frame) "lk201"))
 
 ;;; Controlling the screen width.
-(defvar vt100-wide-mode (= (frame-width) 132)
-  "t if vt100 is in 132-column mode.")
-
-(defun vt100-wide-mode (&optional arg)
+(define-minor-mode vt100-wide-mode
   "Toggle 132/80 column mode for vt100s.
 With positive argument, switch to 132-column mode.
 With negative argument, switch to 80-column mode."
- (interactive "P")
- (setq vt100-wide-mode
-        (if (null arg) (not vt100-wide-mode)
-          (> (prefix-numeric-value arg) 0)))
- (send-string-to-terminal (if vt100-wide-mode "\e[?3h" "\e[?3l"))
- (set-frame-width terminal-frame (if vt100-wide-mode 132 80)))
+  :global t :initial-value (= (frame-width) 132)
+  (send-string-to-terminal (if vt100-wide-mode "\e[?3h" "\e[?3l"))
+  (set-frame-width terminal-frame (if vt100-wide-mode 132 80)))
 
 ;; arch-tag: 9ff41f24-a7c9-4dee-9cf2-fbaa951eb840
 ;;; vt100.el ends here