(require 'crm)
(require 'notmuch-lib)
-(defcustom notmuch-tag-formats
- '(("unread" (propertize tag 'face '(:foreground "red")))
- ("flagged" (propertize tag 'face '(:foreground "blue"))
- (notmuch-tag-format-image-data tag (notmuch-tag-star-icon))))
- "Custom formats for individual tags.
-
-This gives a list that maps from tag names to lists of formatting
-expressions. The car of each element gives a tag name and the
-cdr gives a list of Elisp expressions that modify the tag. If
-the list is empty, the tag will simply be hidden. Otherwise,
-each expression will be evaluated in order: for the first
-expression, the variable `tag' will be bound to the tag name; for
-each later expression, the variable `tag' will be bound to the
-result of the previous expression. In this way, each expression
-can build on the formatting performed by the previous expression.
-The result of the last expression will displayed in place of the
-tag.
-
-For example, to replace a tag with another string, simply use
-that string as a formatting expression. To change the foreground
-of a tag to red, use the expression
- (propertize tag 'face '(:foreground \"red\"))
-
-See also `notmuch-tag-format-image', which can help replace tags
-with images."
-
- :group 'notmuch-search
- :group 'notmuch-show
- :type '(alist :key-type (string :tag "Tag")
+(define-widget 'notmuch-tag-format-type 'lazy
+ "Customize widget for notmuch-tag-format and friends"
+ :type '(alist :key-type (regexp :tag "Tag")
:extra-offset -3
:value-type
(radio :format "%v"
(string :tag "Custom")))
(sexp :tag "Custom")))))
+(defcustom notmuch-tag-formats
+ '(("unread" (propertize tag 'face '(:foreground "red")))
+ ("flagged" (propertize tag 'face '(:foreground "blue"))
+ (notmuch-tag-format-image-data tag (notmuch-tag-star-icon))))
+ "Custom formats for individual tags.
+
+This is an association list that maps from tag name regexps to
+lists of formatting expressions. The first entry whose car
+regexp-matches a tag will be used to format that tag. The regexp
+is implicitly anchored, so to match a literal tag name, just use
+that tag name (if it contains special regexp characters like
+\".\" or \"*\", these have to be escaped). The cdr of the
+matching entry gives a list of Elisp expressions that modify the
+tag. If the list is empty, the tag will simply be hidden.
+Otherwise, each expression will be evaluated in order: for the
+first expression, the variable `tag' will be bound to the tag
+name; for each later expression, the variable `tag' will be bound
+to the result of the previous expression. In this way, each
+expression can build on the formatting performed by the previous
+expression. The result of the last expression will displayed in
+place of the tag.
+
+For example, to replace a tag with another string, simply use
+that string as a formatting expression. To change the foreground
+of a tag to red, use the expression
+ (propertize tag 'face '(:foreground \"red\"))
+
+See also `notmuch-tag-format-image', which can help replace tags
+with images."
+ :group 'notmuch-search
+ :group 'notmuch-show
+ :type 'notmuch-tag-format-type)
+
(defun notmuch-tag-format-image-data (tag data)
"Replace TAG with image DATA, if available.
</g>
</svg>")
+(defvar notmuch-tag--format-cache (make-hash-table :test 'equal)
+ "Cache of tag format lookup. Internal to `notmuch-tag-format-tag'.")
+
+(defun notmuch-tag-clear-cache ()
+ "Clear the internal cache of tag formats."
+ (clrhash notmuch-tag--format-cache))
+
(defun notmuch-tag-format-tag (tag)
- "Format TAG by looking into `notmuch-tag-formats'."
- (let ((formats (assoc tag notmuch-tag-formats)))
- (cond
- ((null formats) ;; - Tag not in `notmuch-tag-formats',
- tag) ;; the format is the tag itself.
- ((null (cdr formats)) ;; - Tag was deliberately hidden,
- nil) ;; no format must be returned
- (t ;; - Tag was found and has formats,
- (let ((tag tag)) ;; we must apply all the formats.
- (dolist (format (cdr formats) tag)
- (setq tag (eval format))))))))
+ "Format TAG by according to `notmuch-tag-formats'.
+
+Callers must ensure that the tag format cache has been recently cleared
+via `notmuch-tag-clear-cache' before using this function. For example,
+it would be appropriate to clear the cache just prior to filling a
+buffer that uses formatted tags."
+
+ (let ((formatted (gethash tag notmuch-tag--format-cache 'missing)))
+ (when (eq formatted 'missing)
+ (let* ((formats
+ (save-match-data
+ ;; Don't use assoc-default since there's no way to
+ ;; distinguish a missing key from a present key with a
+ ;; null cdr:.
+ (assoc* tag notmuch-tag-formats
+ :test (lambda (tag key)
+ (and (eq (string-match key tag) 0)
+ (= (match-end 0) (length tag))))))))
+ (setq formatted
+ (cond
+ ((null formats) ;; - Tag not in `notmuch-tag-formats',
+ tag) ;; the format is the tag itself.
+ ((null (cdr formats)) ;; - Tag was deliberately hidden,
+ nil) ;; no format must be returned
+ (t ;; - Tag was found and has formats,
+ (let ((tag tag)) ;; we must apply all the formats.
+ (dolist (format (cdr formats) tag)
+ (setq tag (eval format)))))))
+ (puthash tag formatted notmuch-tag--format-cache)))
+ formatted))
(defun notmuch-tag-format-tags (tags &optional face)
"Return a string representing formatted TAGS."
projects / notmuch / blobdiff