emacs: show: add invisibility button action

This adds a button action to show hidden parts. In this version "RET"
toggles the visibility of any part which puts content in the buffer
(as opposed to attachments such as application/pdf).

The button is used to hide parts when appropriate (eg text/html in
multipart/alternative).
This commit is contained in:
Mark Walters 2012-12-18 19:27:59 +00:00 committed by David Bremner
parent 0c3a63f1af
commit a5b5404976

View file

@ -554,6 +554,25 @@ message at DEPTH in the current thread."
(let ((handle (mm-make-handle (current-buffer) (list content-type))))
(mm-pipe-part handle))))
;; This is taken from notmuch-wash: maybe it should be unified?
(defun notmuch-show-toggle-part-invisibility (&optional button)
(interactive)
(let* ((button (or button (button-at (point))))
(overlay (button-get button 'overlay)))
(when overlay
(let* ((show (overlay-get overlay 'invisible))
(new-start (button-start button))
(button-label (button-get button :base-label))
(old-point (point))
(inhibit-read-only t))
(overlay-put overlay 'invisible (not show))
(goto-char new-start)
(insert "[ " button-label (if show " ]" " (hidden) ]"))
(let ((old-end (button-end button)))
(move-overlay button new-start (point))
(delete-region (point) old-end))
(goto-char (min old-point (1- (button-end button))))))))
(defun notmuch-show-multipart/*-to-list (part)
(mapcar (lambda (inner-part) (plist-get inner-part :content-type))
(plist-get part :content)))
@ -847,7 +866,12 @@ message at DEPTH in the current thread."
;; also need to check that the button is a genuine part button not
;; a notmuch-wash button.
(when (and button (/= part-beg end) (button-get button :base-label))
(button-put button 'overlay (make-overlay part-beg end)))))
(button-put button 'overlay (make-overlay part-beg end))
;; We toggle the button for hidden parts as that gets the
;; button label right.
(save-excursion
(when hide
(notmuch-show-toggle-part-invisibility button))))))
(defun notmuch-show-insert-bodypart (msg part depth &optional hide)
"Insert the body part PART at depth DEPTH in the current thread.
@ -1953,7 +1977,10 @@ the user (see `notmuch-show-stash-mlarchive-link-alist')."
(defun notmuch-show-part-button-default (&optional button)
(interactive)
(notmuch-show-part-button-internal button notmuch-show-part-button-default-action))
(let ((button (or button (button-at (point)))))
(if (button-get button 'overlay)
(notmuch-show-toggle-part-invisibility button)
(notmuch-show-part-button-internal button notmuch-show-part-button-default-action))))
(defun notmuch-show-part-button-save (&optional button)
(interactive)