From c802d12a1e43fe69f2fcf7a2f7d44018a55bfb65 Mon Sep 17 00:00:00 2001 From: David Edmondson Date: Sat, 20 Feb 2016 18:24:37 +0000 Subject: [PATCH] emacs/show: Accommodate the lack of part header buttons Various pieces of code assumed (reasonably) that part header buttons are present. Modify them to avoid problems if no part headers were inserted. --- emacs/notmuch-show.el | 88 +++++++++++++++++++++++-------------------- 1 file changed, 48 insertions(+), 40 deletions(-) diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el index ddb9c65c..8222f0d1 100644 --- a/emacs/notmuch-show.el +++ b/emacs/notmuch-show.el @@ -501,36 +501,37 @@ message at DEPTH in the current thread." (defun notmuch-show-toggle-part-invisibility (&optional button) (interactive) - (let* ((button (or button (button-at (point)))) - (overlay (button-get button 'overlay)) - (lazy-part (button-get button :notmuch-lazy-part))) - ;; We have a part to toggle if there is an overlay or if there is a lazy part. - ;; If neither is present we cannot toggle the part so we just return nil. - (when (or overlay lazy-part) - (let* ((show (button-get button :notmuch-part-hidden)) - (new-start (button-start button)) - (button-label (button-get button :base-label)) - (old-point (point)) - (properties (text-properties-at (button-start button))) - (inhibit-read-only t)) - ;; Toggle the button itself. - (button-put button :notmuch-part-hidden (not show)) - (goto-char new-start) - (insert "[ " button-label (if show " ]" " (hidden) ]")) - (set-text-properties new-start (point) properties) - (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)))) - ;; Return nil if there is a lazy-part, it is empty, and we are - ;; trying to show it. In all other cases return t. - (if lazy-part - (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)) - t))))) + (let ((button (or button (button-at (point))))) + (when button + (let ((overlay (button-get button 'overlay)) + (lazy-part (button-get button :notmuch-lazy-part))) + ;; We have a part to toggle if there is an overlay or if there is a lazy part. + ;; If neither is present we cannot toggle the part so we just return nil. + (when (or overlay lazy-part) + (let* ((show (button-get button :notmuch-part-hidden)) + (new-start (button-start button)) + (button-label (button-get button :base-label)) + (old-point (point)) + (properties (text-properties-at (button-start button))) + (inhibit-read-only t)) + ;; Toggle the button itself. + (button-put button :notmuch-part-hidden (not show)) + (goto-char new-start) + (insert "[ " button-label (if show " ]" " (hidden) ]")) + (set-text-properties new-start (point) properties) + (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)))) + ;; Return nil if there is a lazy-part, it is empty, and we are + ;; trying to show it. In all other cases return t. + (if lazy-part + (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)) + t))))))) ;; Part content ID handling @@ -639,14 +640,17 @@ will return nil if the CID is unknown or cannot be retrieved." t) (defun notmuch-show-insert-part-multipart/signed (msg part content-type nth depth button) - (button-put button 'face 'notmuch-crypto-part-header) - ;; add signature status button if sigstatus provided + (when button + (button-put button 'face 'notmuch-crypto-part-header)) + ;; Add signature status button if sigstatus provided. (if (plist-member part :sigstatus) (let* ((from (notmuch-show-get-header :From msg)) (sigstatus (car (plist-get part :sigstatus)))) (notmuch-crypto-insert-sigstatus-button sigstatus from)) - ;; if we're not adding sigstatus, tell the user how they can get it - (button-put button 'help-echo "Set notmuch-crypto-process-mime to process cryptographic MIME parts.")) + ;; If we're not adding the signature status, tell the user how + ;; they can get it. + (when button + (button-put button 'help-echo "Set notmuch-crypto-process-mime to process cryptographic MIME parts."))) (let ((inner-parts (plist-get part :content)) (start (point))) @@ -660,17 +664,20 @@ will return nil if the CID is unknown or cannot be retrieved." t) (defun notmuch-show-insert-part-multipart/encrypted (msg part content-type nth depth button) - (button-put button 'face 'notmuch-crypto-part-header) - ;; add encryption status button if encstatus specified + (when button + (button-put button 'face 'notmuch-crypto-part-header)) + ;; Add encryption status button if encryption status is specified. (if (plist-member part :encstatus) (let ((encstatus (car (plist-get part :encstatus)))) (notmuch-crypto-insert-encstatus-button encstatus) - ;; add signature status button if sigstatus specified + ;; Add signature status button if signature status is + ;; specified. (if (plist-member part :sigstatus) (let* ((from (notmuch-show-get-header :From msg)) (sigstatus (car (plist-get part :sigstatus)))) (notmuch-crypto-insert-sigstatus-button sigstatus from)))) - ;; if we're not adding encstatus, tell the user how they can get it + ;; If we're not adding the encryption status, tell the user how + ;; they can get it. (button-put button 'help-echo "Set notmuch-crypto-process-mime to process cryptographic MIME parts.")) (let ((inner-parts (plist-get part :content)) @@ -980,8 +987,9 @@ useful for quoting in replies)." (if show-part (notmuch-show-insert-bodypart-internal msg part mime-type nth depth button) - (button-put button :notmuch-lazy-part - (list msg part mime-type nth depth button))) + (when button + (button-put button :notmuch-lazy-part + (list msg part mime-type nth depth button)))) ;; Some of the body part handlers leave point somewhere up in the ;; part, so we make sure that we're down at the end. -- 2.26.2