diff options
| -rw-r--r-- | emacs/notmuch-lib.el | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/emacs/notmuch-lib.el b/emacs/notmuch-lib.el index 270e3dc6..e7e71ea6 100644 --- a/emacs/notmuch-lib.el +++ b/emacs/notmuch-lib.el @@ -316,6 +316,16 @@ current buffer, if possible." (loop for (key value . rest) on plist by #'cddr collect (cons (intern (substring (symbol-name key) 1)) value))) +(defun notmuch-face-ensure-list-form (face) + "Return FACE in face list form. + +If FACE is already a face list, it will be returned as-is. If +FACE is a face name or face plist, it will be returned as a +single element face list." + (if (and (listp face) (not (keywordp (car face)))) + face + (list face))) + (defun notmuch-combine-face-text-property (start end face) "Combine FACE into the 'face text property between START and END. @@ -324,11 +334,20 @@ and END. Attributes specified by FACE take precedence over existing attributes. FACE must be a face name (a symbol or string), a property list of face attributes, or a list of these." - (let ((pos start)) + ;; A face property can have three forms: a face name (a string or + ;; symbol), a property list, or a list of these two forms. In the + ;; list case, the faces will be combined, with the earlier faces + ;; taking precedent. Here we canonicalize everything to list form + ;; to make it easy to combine. + (let ((pos start) + (face-list (notmuch-face-ensure-list-form face))) (while (< pos end) - (let ((cur (get-text-property pos 'face)) - (next (next-single-property-change pos 'face nil end))) - (put-text-property pos next 'face (cons face cur)) + (let* ((cur (get-text-property pos 'face)) + (cur-list (notmuch-face-ensure-list-form cur)) + (new (cond ((null cur-list) face) + (t (append face-list cur-list)))) + (next (next-single-property-change pos 'face nil end))) + (put-text-property pos next 'face new) (setq pos next))))) (defun notmuch-logged-error (msg &optional extra) |