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TIL: I can use elfeed-search-face-alist to highlight certain headlines in Elfeed

7 December 2023 11:45 PM (emacs | elfeed | til)

I rediscovered that I can use elfeed-search-face-alist to customize how headlines are displayed in Elfeed. I had read it before on Chris Wellons' blog, but I didn't have a use for it then.

With elfeed-search-face-alist I can define a face to be used for an article with a specific tag. I added the Blabbermouth RSS feed to my feeds. 

(setq elfeed-feeds '(("https://blabbermouth.net/feed" music)))

And created 2 taggers. One tags reviews, because those always have /reviews/ in the url. The other has a list of bands that I'm especially interested in. 

(defvar oni-elfeed-blabbermouth-review-tagger
  (elfeed-make-tagger :feed-url (rx "blabbermouth.net")
                      :entry-link (rx "/reviews/")
                      :add 'review)
  "Tagger that marks any reviews from Blabbermouth.")

(defvar oni-elfeed-blabbermouth-favourite-tagger
  (elfeed-make-tagger :feed-url (rx "blabbermouth.net")
                      :entry-title (rx (or "SLIPKNOT"
                                           (seq "DREAM" whitespace "THEATER")
                                           ;; And so on...
                                           ))
                      :add 'favourite)
  "Tagger that highlights specific bands from Blabbermouth.")

(add-hook 'elfeed-new-entry-hook oni-elfeed-blabbermouth-favourite-tagger)
(add-hook 'elfeed-new-entry-hook oni-elfeed-blabbermouth-review-tagger)

And then I can just set up the feeds: 

(add-to-list 'elfeed-search-face-alist '(review :slant italic) t)
(add-to-list 'elfeed-search-face-alist '(favourite :foreground "#f17272") t)

As long as the face definitions don't conflict a headline's face would be the combination of all that apply. For example, by default unread headlines are bold, so unread favourite messages would be bold and somewhat reddish.

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