From f33e684cacba4ae791bd013438959834be43e5f5 Mon Sep 17 00:00:00 2001
From: Mark Wooding <mdw@distorted.org.uk>
Date: Thu, 20 May 2021 18:39:11 +0100
Subject: [PATCH] el/dot-emacs.el: Don't print `flyspell' overlays.

---
 el/dot-emacs.el | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/el/dot-emacs.el b/el/dot-emacs.el
index 9810267..2a19ad1 100644
--- a/el/dot-emacs.el
+++ b/el/dot-emacs.el
@@ -1359,6 +1359,40 @@ case."
 	     (pad . ,(or mat 2))))))
 
 ;;;--------------------------------------------------------------------------
+;;; Printing.
+
+;; Arrange to strip overlays from the buffer before we print .  This will
+;; prevent `flyspell' from interfering with the printout.  (It would be less
+;; bad if `ps-print' could merge the `flyspell' overlay face with the
+;; underlying `font-lock' face, but it can't (and that seems hard).  So
+;; instead we have this hack.
+;;
+;; The basic trick is to copy the relevant text from the buffer being printed
+;; into a temporary buffer and... just print that.  The text properties come
+;; with the text and end up in the new buffer, and the overlays get lost
+;; along the way.  Only problem is that the headers identifying the file
+;; being printed get confused, so remember the original buffer and reinstate
+;; it when constructing the headers.
+(defvar mdw-printing-buffer)
+
+(defadvice ps-generate-header
+    (around mdw-use-correct-buffer () activate compile)
+  "Print the correct name of the buffer being printed."
+  (with-current-buffer mdw-printing-buffer
+    ad-do-it))
+
+(defadvice ps-generate
+    (around mdw-strip-overlays (buffer from to genfunc) activate compile)
+  "Strip overlays -- in particular, from `flyspell' -- before printout."
+  (with-temp-buffer
+    (let ((mdw-printing-buffer buffer))
+      (insert-buffer-substring buffer from to)
+      (ad-set-arg 0 (current-buffer))
+      (ad-set-arg 1 (point-min))
+      (ad-set-arg 2 (point-max))
+      ad-do-it)))
+
+;;;--------------------------------------------------------------------------
 ;;; Other common declarations.
 
 ;; Common mode settings.
-- 
2.11.0