This allows (and requires) the original-tags to be passed along with the current-tags to be passed to notmuch-tag-format-tags. This allows the tag formatting to show added and deleted tags.By default a removed tag is displayed with strike-through in red (if strike-through is not available, eg on a terminal, inverse video is used instead) and an added tag is displayed underlined in green.
If the caller does not wish to use the new feature it can pass current-tags for both arguments and, at this point, we do exactly that in the three callers of this function. Note, we cannot tidily allow original-tags to be optional because we would need to distinguish nil meaning "we are not specifying original-tags" from nil meaning there were no original-tags (an empty list). We use this in subsequent patches to make it clear when a message was unread when you first loaded a show buffer (previously the unread tag could be removed before a user realised that it had been unread). The code adds into the existing tag formatting code. The user can specify exactly how a tag should be displayed normally, when deleted, or when added. For convenience an entry for the empty string in the notmuch-tag-formats (and the corresponding notmuch-tag-deleted-formats notmuch-tag-added-formats) is applied to all tags which do not have an explicit match. This means that a user can tell notmuch not to show deleted tags at all by setting notmuch-tag-deleted-formats to '(("" nil)) or not to show any deleted tags except "unread" by setting it to '(("" nil) ("unread" (propertize tag 'face '(strike-through "red")))) All the variables are customizable; however, more complicated cases like changing the face depending on the type of display will require custom lisp. Currently this overrides notmuch-tag-deleted-formats for the tests setting it to '(("" nil)) so that they get removed from the display and, thus, all tests still pass. --- emacs/notmuch-show.el | 4 ++-- emacs/notmuch-tag.el | 32 +++++++++++++++++++++++++------- emacs/notmuch-tree.el | 2 +- emacs/notmuch.el | 2 +- test/test-lib.el | 4 ++++ 5 files changed, 33 insertions(+), 11 deletions(-) diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el index 1ac80ca..1ce56f9 100644 --- a/emacs/notmuch-show.el +++ b/emacs/notmuch-show.el @@ -344,7 +344,7 @@ operation on the contents of the current buffer." (if (re-search-forward "(\\([^()]*\\))$" (line-end-position) t) (let ((inhibit-read-only t)) (replace-match (concat "(" - (notmuch-tag-format-tags tags) + (notmuch-tag-format-tags tags tags) ")")))))) (defun notmuch-clean-address (address) @@ -423,7 +423,7 @@ message at DEPTH in the current thread." " (" date ") (" - (notmuch-tag-format-tags tags) + (notmuch-tag-format-tags tags tags) ")\n") (overlay-put (make-overlay start (point)) 'face 'notmuch-message-summary-face))) diff --git a/emacs/notmuch-tag.el b/emacs/notmuch-tag.el index 9757a0e..6bc47fb 100644 --- a/emacs/notmuch-tag.el +++ b/emacs/notmuch-tag.el @@ -164,10 +164,25 @@ This can be used with `notmuch-tag-format-image-data'." </g> </svg>") -(defun notmuch-tag-format-tag (tag) - "Format TAG by looking into `notmuch-tag-formats'." - (let ((formats (or (assoc tag notmuch-tag-formats) - (assoc "" notmuch-tag-formats)))) +(defun notmuch-tag-format-tag (tags orig-tags tag) + "Format TAG by looking into `notmuch-tag-formats'. + +TAGS and ORIG-TAGS are lists of the current tags and the original +tags; tags which have been deleted (i.e., are in ORIG-TAGS but +are not in TAGS) are shown using formats from +`notmuch-tag-deleted-formats'; tags which have been added (i.e., +are in TAGS but are not in ORIG-TAGS) are shown using formats +from `notmuch-tag-added-formats' and tags which have not been +changed (the normal case) are shown using formats from +`notmuch-tag-formats'" + (let* ((status-formats (cond ((and (member tag tags) (member tag orig-tags)) + notmuch-tag-formats) + ((not (member tag tags)) + notmuch-tag-deleted-formats) + ((not (member tag orig-tags)) + notmuch-tag-added-formats))) + (formats (or (assoc tag status-formats) + (assoc "" status-formats)))) (cond ((null formats) ;; - Tag not in `notmuch-tag-formats', tag) ;; the format is the tag itself. @@ -178,13 +193,16 @@ This can be used with `notmuch-tag-format-image-data'." (dolist (format (cdr formats) tag) (setq tag (eval format)))))))) -(defun notmuch-tag-format-tags (tags &optional face) +(defun notmuch-tag-format-tags (tags orig-tags &optional face) "Return a string representing formatted TAGS." - (let ((face (or face 'notmuch-tag-face))) + (let ((face (or face 'notmuch-tag-face)) + (all-tags (sort (delete-dups (append tags orig-tags)) #'string<))) (notmuch-combine-face-text-property-string (mapconcat #'identity ;; nil indicated that the tag was deliberately hidden - (delq nil (mapcar #'notmuch-tag-format-tag tags)) + (delq nil (mapcar + (apply-partially #'notmuch-tag-format-tag tags orig-tags) + all-tags)) " ") face t))) diff --git a/emacs/notmuch-tree.el b/emacs/notmuch-tree.el index 4f2ac02..b37e2cd 100644 --- a/emacs/notmuch-tree.el +++ b/emacs/notmuch-tree.el @@ -704,7 +704,7 @@ unchanged ADDRESS if parsing fails." (face (if match 'notmuch-tree-match-tag-face 'notmuch-tree-no-match-tag-face))) - (format format-string (notmuch-tag-format-tags tags face))))))) + (format format-string (notmuch-tag-format-tags tags tags face))))))) (defun notmuch-tree-format-field-list (field-list msg) "Format fields of MSG according to FIELD-LIST and return string" diff --git a/emacs/notmuch.el b/emacs/notmuch.el index 0471750..1436e5a 100644 --- a/emacs/notmuch.el +++ b/emacs/notmuch.el @@ -754,7 +754,7 @@ non-authors is found, assume that all of the authors match." ((string-equal field "tags") (let ((tags (plist-get result :tags))) - (insert (format format-string (notmuch-tag-format-tags tags))))))) + (insert (format format-string (notmuch-tag-format-tags tags tags))))))) (defun notmuch-search-show-result (result &optional pos) "Insert RESULT at POS or the end of the buffer if POS is null." diff --git a/test/test-lib.el b/test/test-lib.el index 37fcb3d..6cbd57c 100644 --- a/test/test-lib.el +++ b/test/test-lib.el @@ -165,3 +165,7 @@ nothing." (t (notmuch-test-report-unexpected output expected))))) + +;; hide deleted tags +(setq notmuch-tag-deleted-formats + '(("" nil))) -- 1.7.9.1