latex layer: add company-reftex

CHANGELOG.develop

@@ -1688,6 +1688,7 @@ Other:
   (thanks to Matt Kramer)
 - Enable auto indent when paste. Remove =latex-mode= from
   =spacemacs-yank-indent-modes= to disable it (thanks to bet4it)
+- Added support for =company-reftex= (thanks to et2010)
 **** Lua
 - Added support for auto-completion with =company= (thanks to halfcrazy)
 **** Language Server Protocol (LSP)

layers/+lang/latex/packages.el

@@ -14,6 +14,7 @@
         auctex
         (auctex-latexmk :toggle (string= "LatexMk" latex-build-command))
         (company-auctex :requires company)
+        (company-reftex :requires company)
         evil-matchit
         (reftex :location built-in)
         flycheck
@@ -144,13 +145,20 @@
     :defer t
     :init (spacemacs|add-company-backends
             :backends
-            company-auctex-labels
-            company-auctex-bibs
             (company-auctex-macros
              company-auctex-symbols
              company-auctex-environments)
             :modes LaTeX-mode)))
 
+(defun latex/init-company-reftex ()
+  (use-package company-reftex
+    :defer t
+    :init (spacemacs|add-company-backends
+            :backends
+            company-reftex-labels
+            company-reftex-citations
+            :modes LaTeX-mode)))
+
 (defun latex/post-init-evil-matchit ()
   (add-hook 'LaTeX-mode-hook 'evil-matchit-mode))