emacs/show: add parameter notmuch-show-single-message

This dynamically bound variable can be set when the caller of
notmuch-show guarantees that exactly one message will match the
query. It avoids transporting and parsing the complete thread
structure.

diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
index 939f8913f2508d5ff145bdbd6a1477fcf278fae4..9a95eb344db9356bdd9c66632383c2660406f5fc 100644 (file)
--- a/emacs/notmuch-show.el
+++ b/emacs/notmuch-show.el
@@ -179,6 +179,8 @@ indentation."
 
 (defvar-local notmuch-show-indent-content t)
 
 
 (defvar-local notmuch-show-indent-content t)
 

+(defvar-local notmuch-show-single-message nil)
+

 (defvar notmuch-show-attachment-debug nil
   "If t log stdout and stderr from attachment handlers.
 
 (defvar notmuch-show-attachment-debug nil
   "If t log stdout and stderr from attachment handlers.
 


@@ -1315,9 +1317,10 @@ Apply the previously saved STATE if supplied, otherwise show the
 first relevant message.
 
 If no messages match the query return NIL."
 first relevant message.
 
 If no messages match the query return NIL."

-  (let* ((cli-args (cons "--exclude=false"
-                        (and notmuch-show-elide-non-matching-messages
-                             (list "--entire-thread=false"))))
+  (let* ((cli-args (list "--exclude=false"))
+        (cli-args (if notmuch-show-elide-non-matching-messages (cons "--entire-thread=false" cli-args) cli-args))
+        ;; "part 0 is the whole message (headers and body)" notmuch-show(1)
+        (cli-args (if notmuch-show-single-message (cons "--part=0" cli-args) cli-args))

         (queries (notmuch-show--build-queries
                   notmuch-show-thread-id notmuch-show-query-context))
         (forest nil)
         (queries (notmuch-show--build-queries
                   notmuch-show-thread-id notmuch-show-query-context))
         (forest nil)


@@ -1328,6 +1331,8 @@ If no messages match the query return NIL."
     (while (and (not forest) queries)
       (setq forest (notmuch-query-get-threads
                    (append cli-args (list "'") (car queries) (list "'"))))
     (while (and (not forest) queries)
       (setq forest (notmuch-query-get-threads
                    (append cli-args (list "'") (car queries) (list "'"))))

+      (when (and forest notmuch-show-single-message)
+       (setq forest (list (list (list forest)))))

       (setq queries (cdr queries)))
     (when forest
       (notmuch-show-insert-forest forest)
       (setq queries (cdr queries)))
     (when forest
       (notmuch-show-insert-forest forest)