Move viewer setup into different file

modules/lang/latex/+viewers.el

@@ -0,0 +1,22 @@
+;;; lang/latex/+viewers.el -*- lexical-binding: t; -*-
+
+(when (featurep! +okular)
+  ;; Configure Okular as viewer. Including a bug fix
+  ;; (https://bugs.kde.org/show_bug.cgi?id=373855)
+  (add-to-list 'TeX-view-program-list '("Okular" ("okular --unique file:%o" (mode-io-correlate "#src:%n%a"))))
+  (add-to-list 'TeX-view-program-selection '(output-pdf "Okular")))
+
+;; Or Skim
+(when (featurep! +skim)
+  (add-to-list 'TeX-view-program-selection 'output-pdf '("Skim")))
+
+;; Or Zathura
+(when (featurep! +zathura)
+  (add-to-list 'TeX-view-program-selection '(output-pdf "Zathura")))
+
+;; Or PDF-tools, but only if the module is also loaded
+(when (and (featurep! :tools pdf)
+           (featurep! +pdf-tools))
+  (add-to-list 'TeX-view-program-selection '(output-pdf "PDF Tools"))
+  ;; Enable auto reverting the PDF document with PDF Tools
+  (add-hook 'TeX-after-compilation-finished-functions #'TeX-revert-document-buffer))