enable source-pair for tex files

init.el

@@ -109,6 +109,11 @@
 (add-hook 'LaTeX-mode-hook 'subword-mode)
 (add-hook 'LaTeX-mode-hook (lambda () (modify-syntax-entry ?\\ "w" LaTeX-mode-syntax-table)))
 
+(require 'sourcepair)
+(add-hook 'LaTeX-mode-hook (lambda () (setq sourcepair-source-extensions '(".tex"))))
+(add-hook 'LaTeX-mode-hook (lambda () (setq sourcepair-header-extensions '(".p.tex"))))
+(global-set-key (kbd "<f6>") 'sourcepair-load)
+
 ;; this should really be called in the hook
 (setq subword-forward-regexp "\\W*\\(\\([\\\\[:upper:]]*\\W?\\)[[:lower:][:digit:]]*\\)")
 (setq subword-backward-regexp "\\(\\(\\W\\|[[:lower:][:digit:]]\\)\\([\\\\[:upper:]]+\\W*\\)\\|\\W\\w+\\)")