From: Mark Wooding <mdw@distorted.org.uk>
Date: Mon, 28 Dec 2015 14:12:52 +0000 (+0000)
Subject: el/dot-emacs.el: Don't highlight bad whitespace in read-only buffers.
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/profile/commitdiff_plain/2717a191863be96a568b9534e660de469bda3009

el/dot-emacs.el: Don't highlight bad whitespace in read-only buffers.

It's not like I'm planning to do anything about them.
---

diff --git a/el/dot-emacs.el b/el/dot-emacs.el
index 7e55329..1b0e350 100644
--- a/el/dot-emacs.el
+++ b/el/dot-emacs.el
@@ -837,11 +837,17 @@ (defun mdw-misc-mode-config ()
   (trap (turn-on-font-lock)))
 
 (defun mdw-post-local-vars-misc-mode-config ()
-  (when mdw-do-misc-mode-hacking
+  (when (and mdw-do-misc-mode-hacking
+	     (not buffer-read-only))
     (setq show-trailing-whitespace t)
     (mdw-whitespace-mode 1)))
 (add-hook 'hack-local-variables-hook 'mdw-post-local-vars-misc-mode-config)
 
+(defadvice toggle-read-only (after mdw-angry-fruit-salad activate)
+  (when mdw-do-misc-mode-hacking
+    (setq show-trailing-whitespace (not buffer-read-only))
+    (mdw-whitespace-mode (if buffer-read-only 0 1))))
+
 (eval-after-load 'gtags
   '(progn
      (dolist (key '([mouse-2] [mouse-3]))