auto-save files on window or buffer switch

modules/prelude-core.el

@@ -360,5 +360,20 @@ there's a region, all lines that region covers will be duplicated."
   (global-set-key [M-left]  'left-word)
   (message "Arrow keys navigation in buffers in now allowed."))
 
+;; automatically save buffers associated with files on buffer switch
+;; and on windows switch
+(defadvice switch-to-buffer (before save-buffer-now activate)
+  (when buffer-file-name (save-buffer)))
+(defadvice other-window (before other-window-now activate)
+  (when buffer-file-name (save-buffer)))
+(defadvice windmove-up (before other-window-now activate)
+  (when buffer-file-name (save-buffer)))
+(defadvice windmove-down (before other-window-now activate)
+  (when buffer-file-name (save-buffer)))
+(defadvice windmove-left (before other-window-now activate)
+  (when buffer-file-name (save-buffer)))
+(defadvice windmove-right (before other-window-now activate)
+  (when buffer-file-name (save-buffer)))
+
 (provide 'prelude-core)
 ;;; prelude-core.el ends here