[PATCH v5 6/7] emacs/mua: Let user specify which parts get a header in citations.

[Mark Walters]

From: David Edmondson <dme at dme.org>

Add a customizable function specifying which parts get a header when
replying, and give some sensible possiblities. These are,

1) all parts except multipart/*. (Subparts of a multipart part do
receive a header button.)

2) only included text/* parts.

3) Exactly as in the show buffer.

4) None at all. This means the reply contains a mish-mash of all the
original message's parts.
---
 emacs/notmuch-mua.el  | 30 ++++++++++++++++++++++++++----
 emacs/notmuch-show.el | 13 +++++++++++++
 2 files changed, 39 insertions(+), 4 deletions(-)

diff --git a/emacs/notmuch-mua.el b/emacs/notmuch-mua.el
index a386d43..fcb3e95 100644
--- a/emacs/notmuch-mua.el
+++ b/emacs/notmuch-mua.el
@@ -93,6 +93,23 @@ Note that these functions use `mail-citation-hook' if that is non-nil."
   :link '(custom-manual "(message)Insertion Variables")
   :group 'notmuch-reply)
 
+(defcustom notmuch-mua-reply-insert-header-p-function
+  'notmuch-show-reply-insert-header-p-trimmed
+  "Function to decide which parts get a header when replying.
+
+This function specifies which parts of a mime message with
+mutiple parts get a header."
+  :type '(radio (const :tag "All except multipart/* and hidden parts"
+			       notmuch-show-reply-insert-header-p-trimmed)
+		(const :tag "Only for included text parts"
+			       notmuch-show-reply-insert-header-p-minimal)
+		(const :tag "Exactly as in show view"
+			       notmuch-show-insert-header-p)
+		(const :tag "No part headers"
+			       notmuch-show-reply-insert-header-p-never)
+		(function :tag "Other"))
+  :group 'notmuch-reply)
+
 ;;
 
 (defun notmuch-mua-get-switch-function ()
@@ -223,10 +240,15 @@ Note that these functions use `mail-citation-hook' if that is non-nil."
 	(insert "Date: " date "\n\n")
 
 	(insert (with-temp-buffer
-		  ;; Don't attempt to clean up messages, excerpt
-		  ;; citations, etc. in the original message before
-		  ;; quoting.
-		  (let ((notmuch-show-insert-text/plain-hook nil))
+		  (let
+		      ;; Don't attempt to clean up messages, excerpt
+		      ;; citations, etc. in the original message before
+		      ;; quoting.
+		      ((notmuch-show-insert-text/plain-hook nil)
+		       ;; Don't omit long parts.
+		       (notmuch-show-max-text-part-size 0)
+		       ;; Insert headers for parts as appropriate for replying.
+		       (notmuch-show-insert-header-p-function notmuch-mua-reply-insert-header-p-function))
 		    (notmuch-show-insert-body original (plist-get original :body) 0)
 		    (buffer-substring-no-properties (point-min) (point-max)))))
 
diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
index 5654d11..ec58cac 100644
--- a/emacs/notmuch-show.el
+++ b/emacs/notmuch-show.el
@@ -957,6 +957,19 @@ this part.")
     (not (and (string= mime-type "text/plain")
 	      (<= (plist-get part :id) 1)))))
 
+(defun notmuch-show-reply-insert-header-p-never (part hide)
+  nil)
+
+(defun notmuch-show-reply-insert-header-p-trimmed (part hide)
+  (let ((mime-type (notmuch-show-mime-type part)))
+    (and (not (notmuch-match-content-type mime-type "multipart/*"))
+	 (not hide))))
+
+(defun notmuch-show-reply-insert-header-p-minimal (part hide)
+  (let ((mime-type (notmuch-show-mime-type part)))
+    (and (notmuch-match-content-type mime-type "text/*")
+	 (not hide))))
+
 (defun notmuch-show-insert-bodypart (msg part depth &optional hide)
   "Insert the body part PART at depth DEPTH in the current thread.
 
-- 
2.1.4