notmuch.el: colorize lines in notmuch-search based on thread tags.

[notmuch] / emacs / notmuch.el

diff --git a/emacs/notmuch.el b/emacs/notmuch.el
index 9ff376786c476cd17ea8783fbe8a4e1f58baf3cc..4bc429461c599e102111d8bfee8cbae36ea3271a 100644 (file)
--- a/emacs/notmuch.el
+++ b/emacs/notmuch.el
@@ -411,9 +411,19 @@ Complete list of currently available key bindings:
 (defun notmuch-search-show-thread ()
   "Display the currently selected thread."
   (interactive)
-  (let ((thread-id (notmuch-search-find-thread-id)))
+  (let ((thread-id (notmuch-search-find-thread-id))
+       (subject (notmuch-search-find-subject))
+       buffer-name)
+    (when (string-match "^[ \t]*$" subject)
+      (setq subject "[No Subject]"))
+    (setq buffer-name (concat "*"
+                             (truncate-string-to-width subject 32 nil nil t)
+                             "*"))
     (if (> (length thread-id) 0)
-       (notmuch-show thread-id (current-buffer) notmuch-search-query-string)
+       (notmuch-show thread-id
+                     (current-buffer)
+                     notmuch-search-query-string
+                     buffer-name)
       (error "End of search results"))))
 
 (defun notmuch-search-reply-to-thread ()
@@ -516,6 +526,35 @@ This function advances the next thread when finished."
                       notmuch-search-target-line)
                  (goto-line notmuch-search-target-line)))))))
 
+(defcustom notmuch-search-line-faces nil
+  "Tag/face mapping for line highlighting in notmuch-search.
+
+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 '((\"delete\" . '(:foreground \"red\"))
+                                 (\"unread\" . '(:foreground \"green\"))))
+
+Order matters: for lines with multiple tags, the the first
+matching will be applied."
+  :type '(alist :key-type (string) :value-type (list))
+  :group 'notmuch)
+
+(defun notmuch-search-color-line (start end line-tag-list)
+  "Colorize lines in notmuch-show based on tags"
+  (if notmuch-search-line-faces
+      (let ((overlay (make-overlay start end))
+           (tags-faces (copy-alist notmuch-search-line-faces)))
+       (while tags-faces
+         (let* ((tag-face (car tags-faces))
+                (tag (car tag-face))
+                (face (cdr tag-face)))
+           (cond ((member tag line-tag-list)
+                  (overlay-put overlay 'face face)
+                  (setq tags-faces nil))
+                 (t
+                  (setq tags-faces (cdr tags-faces)))))))))
+
 (defun notmuch-search-process-filter (proc string)
   "Process and filter the output of \"notmuch search\""
   (let ((buffer (process-buffer proc))
@@ -534,13 +573,15 @@ This function advances the next thread when finished."
                           (authors (match-string 4 string))
                           (authors-length (length authors))
                           (subject (match-string 5 string))
-                          (tags (match-string 6 string)))
+                          (tags (match-string 6 string))
+                          (tag-list (if tags (save-match-data (split-string tags)))))
                      (if (> authors-length notmuch-search-authors-width)
                          (set 'authors (concat (substring authors 0 (- notmuch-search-authors-width 3)) "...")))
                      (goto-char (point-max))
                      (let ((beg (point-marker))
                            (format-string (format "%%s %%-7s %%-%ds %%s (%%s)\n" notmuch-search-authors-width)))
                        (insert (format format-string date count authors subject tags))
+                       (notmuch-search-color-line beg (point-marker) tag-list)
                        (put-text-property beg (point-marker) 'notmuch-search-thread-id thread-id)
                        (put-text-property beg (point-marker) 'notmuch-search-authors authors)
                        (put-text-property beg (point-marker) 'notmuch-search-subject subject)