+ (goto-char (point-min))
+ (forward-line (1- notmuch-search-target-line)))))))))
+
+(define-widget 'notmuch--custom-face-edit 'lazy
+ "Custom face edit with a tag Edit Face"
+ ;; I could not persuage custom-face-edit to respect the :tag
+ ;; property so create a widget specially
+ :tag "Manually specify face"
+ :type 'custom-face-edit)
+
+(defcustom notmuch-search-line-faces
+ '(("unread" . notmuch-search-unread-face)
+ ("flagged" . notmuch-search-flagged-face))
+ "Alist of tags to faces for line highlighting in notmuch-search.
+Each element looks like (TAG . FACE).
+A thread with TAG will have FACE applied.
+
+Here is an example of how to color search results based on tags.
+ (the following text would be placed in your ~/.emacs file):
+
+ (setq notmuch-search-line-faces '((\"unread\" . (:foreground \"green\"))
+ (\"deleted\" . (:foreground \"red\"
+ :background \"blue\"))))
+
+The FACE must be a face name (a symbol or string), a property
+list of face attributes, or a list of these. The faces for
+matching tags are merged, with earlier attributes overriding
+later. A message having both \"deleted\" and \"unread\" tags with
+the above settings would have a green foreground and blue
+background."
+ :type '(alist :key-type (string)
+ :value-type (radio (face :tag "Face name")
+ (notmuch--custom-face-edit)))
+ :group 'notmuch-search
+ :group 'notmuch-faces)
+
+(defun notmuch-search-color-line (start end line-tag-list)
+ "Colorize lines in `notmuch-show' based on tags."
+ ;; Reverse the list so earlier entries take precedence
+ (dolist (elem (reverse notmuch-search-line-faces))
+ (let ((tag (car elem))
+ (face (cdr elem)))
+ (when (member tag line-tag-list)
+ (notmuch-apply-face nil face nil start end)))))
+
+(defun notmuch-search-author-propertize (authors)
+ "Split `authors' into matching and non-matching authors and
+propertize appropriately. If no boundary between authors and
+non-authors is found, assume that all of the authors match."
+ (if (string-match "\\(.*\\)|\\(.*\\)" authors)
+ (concat (propertize (concat (match-string 1 authors) ",")
+ 'face 'notmuch-search-matching-authors)
+ (propertize (match-string 2 authors)
+ 'face 'notmuch-search-non-matching-authors))
+ (propertize authors 'face 'notmuch-search-matching-authors)))
+
+(defun notmuch-search-insert-authors (format-string authors)
+ ;; Save the match data to avoid interfering with
+ ;; `notmuch-search-process-filter'.
+ (save-match-data
+ (let* ((formatted-authors (format format-string authors))
+ (formatted-sample (format format-string ""))
+ (visible-string formatted-authors)
+ (invisible-string "")
+ (padding ""))
+
+ ;; Truncate the author string to fit the specification.
+ (if (> (length formatted-authors)
+ (length formatted-sample))
+ (let ((visible-length (- (length formatted-sample)
+ (length "... "))))
+ ;; Truncate the visible string according to the width of
+ ;; the display string.
+ (setq visible-string (substring formatted-authors 0 visible-length)
+ invisible-string (substring formatted-authors visible-length))
+ ;; If possible, truncate the visible string at a natural
+ ;; break (comma or pipe), as incremental search doesn't
+ ;; match across the visible/invisible border.
+ (when (string-match "\\(.*\\)\\([,|] \\)\\([^,|]*\\)" visible-string)
+ ;; Second clause is destructive on `visible-string', so
+ ;; order is important.
+ (setq invisible-string (concat (match-string 3 visible-string)
+ invisible-string)
+ visible-string (concat (match-string 1 visible-string)
+ (match-string 2 visible-string))))
+ ;; `visible-string' may be shorter than the space allowed
+ ;; by `format-string'. If so we must insert some padding
+ ;; after `invisible-string'.
+ (setq padding (make-string (- (length formatted-sample)
+ (length visible-string)
+ (length "..."))
+ ? ))))
+
+ ;; Use different faces to show matching and non-matching authors.
+ (if (string-match "\\(.*\\)|\\(.*\\)" visible-string)
+ ;; The visible string contains both matching and
+ ;; non-matching authors.
+ (setq visible-string (notmuch-search-author-propertize visible-string)
+ ;; The invisible string must contain only non-matching
+ ;; authors, as the visible-string contains both.
+ invisible-string (propertize invisible-string
+ 'face 'notmuch-search-non-matching-authors))
+ ;; The visible string contains only matching authors.
+ (setq visible-string (propertize visible-string
+ 'face 'notmuch-search-matching-authors)
+ ;; The invisible string may contain both matching and
+ ;; non-matching authors.
+ invisible-string (notmuch-search-author-propertize invisible-string)))
+
+ ;; If there is any invisible text, add it as a tooltip to the
+ ;; visible text.
+ (when (not (string= invisible-string ""))
+ (setq visible-string (propertize visible-string 'help-echo (concat "..." invisible-string))))
+
+ ;; Insert the visible and, if present, invisible author strings.
+ (insert visible-string)
+ (when (not (string= invisible-string ""))
+ (let ((start (point))
+ overlay)
+ (insert invisible-string)
+ (setq overlay (make-overlay start (point)))
+ (overlay-put overlay 'invisible 'ellipsis)
+ (overlay-put overlay 'isearch-open-invisible #'delete-overlay)))
+ (insert padding))))
+
+(defun notmuch-search-insert-field (field format-string result)
+ (cond
+ ((string-equal field "date")
+ (insert (propertize (format format-string (plist-get result :date_relative))
+ 'face 'notmuch-search-date)))
+ ((string-equal field "count")
+ (insert (propertize (format format-string
+ (format "[%s/%s]" (plist-get result :matched)
+ (plist-get result :total)))
+ 'face 'notmuch-search-count)))
+ ((string-equal field "subject")
+ (insert (propertize (format format-string
+ (notmuch-sanitize (plist-get result :subject)))
+ 'face 'notmuch-search-subject)))
+
+ ((string-equal field "authors")
+ (notmuch-search-insert-authors
+ format-string (notmuch-sanitize (plist-get result :authors))))
+
+ ((string-equal field "tags")
+ (let ((tags (plist-get result :tags))
+ (orig-tags (plist-get result :orig-tags)))
+ (insert (format format-string (notmuch-tag-format-tags tags orig-tags)))))))
+
+(defun notmuch-search-show-result (result pos)
+ "Insert RESULT at POS."
+ ;; Ignore excluded matches
+ (unless (= (plist-get result :matched) 0)
+ (save-excursion
+ (goto-char pos)
+ (dolist (spec notmuch-search-result-format)
+ (notmuch-search-insert-field (car spec) (cdr spec) result))
+ (insert "\n")
+ (notmuch-search-color-line pos (point) (plist-get result :tags))
+ (put-text-property pos (point) 'notmuch-search-result result))))
+
+(defun notmuch-search-append-result (result)
+ "Insert RESULT at the end of the buffer.
+
+This is only called when a result is first inserted so it also
+sets the :orig-tag property."
+ (let ((new-result (plist-put result :orig-tags (plist-get result :tags)))
+ (pos (point-max)))
+ (notmuch-search-show-result new-result pos)
+ (when (string= (plist-get result :thread) notmuch-search-target-thread)
+ (setq notmuch-search-target-thread "found")
+ (goto-char pos))))