Emacs: Add case functions, vala-mode change

Add some functions that may help me managing case for enums and such.

For some reason vala-mode really likes having indent-tabs-mode turned
on, but I prefer it off anyway.

emacs/init.org

@@ -552,6 +552,42 @@ buffer hanging around.
         (kill-buffer (current-buffer)))))
 #+END_SRC
 
+I don't have a capslock key on my keyboard, and sometimes it's
+annoying to have to hold my shift key for long enums and such. The
+idea is to type everything except regular caps in lower case and then
+use these functions to fix them.
+
+#+BEGIN_SRC emacs-lisp
+  (defun oni:change-prev-case (num dir)
+    (let ((regfunc (if (eq dir 'up) 'upcase-region 'downcase-region))
+          (wordfunc (if (eq dir 'up) 'upcase-word 'downcase-word)))
+      (if (> num 1)
+          (funcall regfunc (point) (- (point) num))
+        (funcall wordfunc -1))))
+
+  (defun oni:upcase-prev (num)
+    (interactive "p")
+    (oni:change-prev-case num 'up))
+
+  (defun oni:downcase-prev (num)
+    (interactive "p")
+    (oni:change-prev-case num 'down))
+
+  (global-set-key (kbd "C-c u") 'oni:upcase-prev)
+  (global-set-key (kbd "C-c d") 'oni:downcase-prev)
+#+END_SRC
+
+For some reason, =vala-mode= turns on =indent-tabs-mode=, I don't like
+that.
+
+#+BEGIN_SRC emacs-lisp
+  (defun oni:vala-mode-func ()
+    "Function for `vala-mode-hook'."
+    (setq indent-tabs-mode nil))
+
+  (add-hook 'vala-mode-hook 'oni:vala-mode-func)
+#+END_SRC
+
 #+BEGIN_SRC emacs-lisp
   (eval-after-load "rainbow-mode" '(oni:rainbow-mode-init))
   (eval-after-load "smex" '(oni:smex-init))