1 files changed, 37 insertions, 3 deletions

diff --git a/tools/sample.emacs b/tools/sample.emacs
index 41a59acff3..53b75fd907 100644
--- a/tools/sample.emacs
+++ b/tools/sample.emacs
@@ -1,10 +1,44 @@
 ;; $Id$ -*- emacs-lisp -*-
 
 ;; Here's a sample .emacs file that might help you along the way.
-;; Just copy this region and paste it into your .emacs file.  You
-;; might not want to use this if you already use c-mode-hooks for
-;; other styles.
+
+;; First comes a setup that is ideal when you are only working with
+;; rockbox. Just select the next few lines, paste it into your .emacs
+;; and change the path to the tools folder. (If you are using more
+;; than one style. Look further down the this file.)
 
 (load-file "<YOUR-PATH-TO-ROCKBOX>/tools/rockbox-style.el")
 (add-hook 'c-mode-common-hook 'rockbox-c-mode-common-hook)
 
+;; If you are using more than one style in maybe more than one project
+;; the example below might help out. It uses a predicate hook pair to
+;; select the right hook to use.
+
+(defvar my-style-selective-mode-hook nil
+  "Holds a list of predicate and hooks pairs. (list (PREDICATE . HOOK)
+...) It is used by my-mode-selective-mood-hook-function for choosing
+the right hook to run.")
+
+(defun my-style-selective-mode-hook-function ()
+  "Run each PREDICATE in `my-style-selective-mode-hook' to see if the 
+HOOK in the pair should be executed. If the PREDICATE evaluate to non
+nil HOOK is executed and the rest of the hooks are ignored."
+  (let ((h my-style-selective-mode-hook))
+    (while (not (eval (caar h)))
+      (setq h (cdr h)))
+    (funcall (cdar h))))
+
+;;; Example configuration.
+;; Add the selective hook to the c-mode-common-hook
+(add-hook 'c-mode-common-hook 'my-style-selective-mode-hook-function)
+
+;; Add your own hooks and predicates. The predicate should evaluate to
+;; non nil if the hook in the pair is supposed to be evaluated. In the
+;; example a part of the path is used to select what style to
+;; use. Choose what is appropriate for you.
+(add-hook 'my-style-selective-mode-hook 
+          '((string-match "rockbox" (buffer-file-name)) . rockbox-c-mode-common-hook))
+(add-hook 'my-style-selective-mode-hook 
+          '((string-match "other" (buffer-file-name)) . other-c-mode-common-hook))
+;; Make sure the default style is appended.
+(add-hook 'my-style-selective-mode-hook '(t . my-c-mode-common-hook) t)