emacs/show: special case toggling display of images

According to emacs upstream [1], we can't expect overlay invisibility
and images to get along. This commit uses the previously stashed
undisplayer functions to actually remove the images from the buffer.
When the image is toggled, it is essentially redisplayed from scratch,
using the previously stashed redisplay data.

[1]: https://lists.gnu.org/archive/html/emacs-devel/2023-08/msg00593.html
This commit is contained in:
David Bremner 2023-09-24 06:51:52 -03:00
parent 0646d4855b
commit a064a25427

View file

@ -644,8 +644,24 @@ message at DEPTH in the current thread."
(when show
(button-put button :notmuch-lazy-part nil)
(notmuch-show-lazy-part lazy-part button))
;; else there must be an overlay.
(overlay-put overlay 'invisible (not show))
(let* ((part (plist-get properties :notmuch-part))
(undisplayer (plist-get part :undisplayer))
(mime-type (plist-get part :computed-type))
(redisplay-data (button-get button
:notmuch-redisplay-data))
(imagep (string-match "^image/" mime-type)))
(cond
((and imagep (not show) undisplayer)
;; call undisplayer thunk created by gnus.
(funcall undisplayer)
;; there is an extra newline left
(delete-region
(+ 1 (button-end button))
(+ 2 (button-end button))))
((and imagep show redisplay-data)
(notmuch-show-lazy-part redisplay-data button))
(t
(overlay-put overlay 'invisible (not show)))))
t)))))))
;;; Part content ID handling