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+#+title: TIL: I can use elfeed-search-face-alist to highlight certain headlines in Elfeed
+#+tags: emacs, elfeed, til
+#+comments: on
+#+status: publish
+#+DATE: Thu, 07 Dec 2023 22:45:51 GMT
+#+UPDATE_URL: /admin/modify-post/2023%252f12%252f07%252ftil-i-can-use-elfeed-search-face-alist-to-highlight-certain-headlines-in-elfeed
+
+I rediscovered that I can use =elfeed-search-face-alist= to customize how headlines are displayed in Elfeed. I had read it before [[https://nullprogram.com/blog/2015/12/03/#custom-entry-colors][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 [[https://blabbermouth.net/][Blabbermouth]] RSS feed to my feeds.
+
+#+begin_src emacs-lisp
+  (setq elfeed-feeds '(("https://blabbermouth.net/feed" music)))
+#+end_src
+
+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.
+
+#+begin_src emacs-lisp
+  (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)
+#+end_src
+
+And then I can just set up the feeds:
+
+#+begin_src emacs-lisp
+  (add-to-list 'elfeed-search-face-alist '(review :slant italic) t)
+  (add-to-list 'elfeed-search-face-alist '(favourite :foreground "#f17272") t)
+#+end_src
+
+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.