From 82b05985ba55761c497810cf9e14fd530253a1b2 Mon Sep 17 00:00:00 2001
From: Alex Schroeder <alex@gnu.org>
Date: Sat, 19 Aug 2017 10:39:37 +0200
Subject: [PATCH] Use define-minor-mode for rcirc-omit-mode

---
 lisp/net/rcirc.el | 54 +++++++++++++++++++++--------------------------
 1 file changed, 24 insertions(+), 30 deletions(-)

diff --git a/lisp/net/rcirc.el b/lisp/net/rcirc.el
index ddff25c1e92..c01ece9641d 100644
--- a/lisp/net/rcirc.el
+++ b/lisp/net/rcirc.el
@@ -176,10 +176,30 @@ underneath each nick."
   "If non-nil, activity in this buffer is considered low priority.")
 (make-variable-buffer-local 'rcirc-low-priority-flag)
 
-(defvar rcirc-omit-mode nil
-  "Non-nil if Rcirc-Omit mode is enabled.
-Use the command `rcirc-omit-mode' to change this variable.")
-(make-variable-buffer-local 'rcirc-omit-mode)
+(defcustom rcirc-omit-responses
+  '("JOIN" "PART" "QUIT" "NICK")
+  "Responses which will be hidden when `rcirc-omit-mode' is enabled."
+  :type '(repeat string)
+  :group 'rcirc)
+
+(define-minor-mode rcirc-omit-mode
+  "Toggle the hiding of \"uninteresting\" lines.
+With a prefix argument ARG, enable Rcirc-Omit mode if ARG is
+positive, and disable it otherwise. If called from Lisp, enable
+the mode if ARG is omitted or nil.
+
+Uninteresting lines are those whose responses are listed in
+`rcirc-omit-responses'."
+  nil " Omit" nil
+  (if rcirc-omit-mode
+      (progn
+	(add-to-invisibility-spec '(rcirc-omit . nil))
+	(message "Rcirc-Omit mode enabled"))
+    (remove-from-invisibility-spec '(rcirc-omit . nil))
+    (message "Rcirc-Omit mode disabled"))
+  (dolist (window (get-buffer-window-list (current-buffer)))
+    (with-selected-window window
+      (recenter (when (> (point) rcirc-prompt-start-marker) -1)))))
 
 (defcustom rcirc-time-format "%H:%M "
   "Describes how timestamps are printed.
@@ -1405,12 +1425,6 @@ the of the following escape sequences replaced by the described values:
 		:value-type string)
   :group 'rcirc)
 
-(defcustom rcirc-omit-responses
-  '("JOIN" "PART" "QUIT" "NICK")
-  "Responses which will be hidden when `rcirc-omit-mode' is enabled."
-  :type '(repeat string)
-  :group 'rcirc)
-
 (defun rcirc-format-response-string (process sender response target text)
   "Return a nicely-formatted response string, incorporating TEXT
 \(and perhaps other arguments).  The specific formatting used
@@ -1881,9 +1895,6 @@ if ARG is omitted or nil."
 (or (assq 'rcirc-low-priority-flag minor-mode-alist)
     (setq minor-mode-alist
           (cons '(rcirc-low-priority-flag " LowPri") minor-mode-alist)))
-(or (assq 'rcirc-omit-mode minor-mode-alist)
-    (setq minor-mode-alist
-          (cons '(rcirc-omit-mode " Omit") minor-mode-alist)))
 
 (defun rcirc-toggle-ignore-buffer-activity ()
   "Toggle the value of `rcirc-ignore-buffer-activity-flag'."
@@ -1905,23 +1916,6 @@ if ARG is omitted or nil."
 	     "Activity in this buffer is normal priority"))
   (force-mode-line-update))
 
-(defun rcirc-omit-mode ()
-  "Toggle the Rcirc-Omit mode.
-If enabled, \"uninteresting\" lines are not shown.
-Uninteresting lines are those whose responses are listed in
-`rcirc-omit-responses'."
-  (interactive)
-  (setq rcirc-omit-mode (not rcirc-omit-mode))
-  (if rcirc-omit-mode
-      (progn
-	(add-to-invisibility-spec '(rcirc-omit . nil))
-	(message "Rcirc-Omit mode enabled"))
-    (remove-from-invisibility-spec '(rcirc-omit . nil))
-    (message "Rcirc-Omit mode disabled"))
-  (dolist (window (get-buffer-window-list (current-buffer)))
-    (with-selected-window window
-      (recenter (when (> (point) rcirc-prompt-start-marker) -1)))))
-
 (defun rcirc-switch-to-server-buffer ()
   "Switch to the server buffer associated with current channel buffer."
   (interactive)
-- 
2.39.2