Re: Change the color of article counts when equal to 0

[Richard Riley <rileyrg@googlemail.com>]

Sébastien Vauban <wxhgmqzgwmuf@spammotel.com> writes:

> Hello,
>
> I'm using 4 count numbers on every group line:
>
>
>
>
> --8<---------------cut here---------------start------------->8---
>       ;; format of the group buffer
>       (setq gnus-group-line-format (concat "%M%m%P "
>                                            "%(%-39,39g%) "
>                                            "%5{%3y Unread%} "
>                                            "%6{(%3U Unseen)%} + "
>                                            "%7{%3T Ticked%} < "
>                                            "%6t Total Items"
>                                            "\n"))
> --8<---------------cut here---------------end--------------->8---
>
>
>
> with these fonts:
>
>
>
>
> --8<---------------cut here---------------start------------->8---
>       ;; create faces for article counts
>       (defface my/unread-face
>         '((t (:weight bold :foreground "black"))) "Ticked group face")
>       (defface my/unseen-face
>         '((t (:weight bold :foreground "blue"))) "Ticked group face")
>       (defface my/ticked-face
>         '((t (:weight bold :foreground "orange"))) "Ticked group face")
>
>       (setq gnus-face-5 'my/unread-face)
>       (setq gnus-face-6 'my/unseen-face)
>       (setq gnus-face-7 'my/ticked-face)
> --8<---------------cut here---------------end--------------->8---
>
>
>
> I would like to see the numbers in very light gray when they're equal to 0,
> but can't figure out how -- or, even, if possible at all... Can you help me?
>
> Best regards,
>   Seb

You need to use a user format function.

e.g here is one that I use to create a mailbox icon to replace the word "INBOX".

,----
|   (defun gnus-user-format-function-g (headers) ;; gnus-group-line-format use %ug to call this func! e.g  "%M%S%p%P%(%-40,40ug%)%-5uy %ud\n"
|     ;; split full group protocol-server:group into three parts.
|     (string-match "\\(^.*\\)\\+\\(.*\\):\\(.*\\)" gnus-tmp-group)
|     ;; map the first two letters of the server name to a more friendly and cuddly display name
|     (let*  ((match-ok (match-string 2 gnus-tmp-group))
|             (server-key (if (null match-ok) nil (upcase(substring match-ok 0 2)))))
|       (if (zerop (length server-key))
|           gnus-tmp-group
|         ;; construct new group format line with a small envelope taking the place of any INBOX
|         (concat
|          (propertize
|           (format "%-8s" (cdr (assoc server-key rgr/server-name-maps)))
|           'face (rgr/unread-face "my-group-server-face") 'face (rgr/unread-face (concat "my-group-server-face-" server-key)) 'gnus-face t)
|          " - "
|          (if (string-match "INBOX" (match-string 3 gnus-tmp-group) )
|              (propertize "\x2709" 'face (rgr/unread-face "my-inbox-icon-face") 'gnus-face t)
|            (propertize (match-string 3 gnus-tmp-group) 'face (rgr/unread-face "my-group-face") 'gnus-face t) )))))
`----

The important bits for you are the propertize cells setting a special
face for something : in your case the count value.

Here is my user function y which does this for count :-

,----
|   (defun gnus-user-format-function-y (headers)
|     "return string representation for unread articles"
|     (concat
|      (propertize  (if (= (string-to-number  gnus-tmp-number-of-unread) 0) "" "\x2709") 'face (rgr/unread-face "my-inbox-icon-face") 'gnus-face t)
|      (propertize  (if (= (string-to-number  gnus-tmp-number-of-unread) 0) ""
|                     (concat "   (" gnus-tmp-number-of-unread ")")) 'face (rgr/unread-face "my-unread-count-face") 'gnus-face t)))
`----

And here the group line format

,----
| gnus-group-line-format is a variable defined in `gnus-group.el'.
| Its value is 
| "%M%S%p%P%-12uy%(%-60ug%)\n"
| 
`----

Hope it sets you on the right way.

regards

r.