From b4dd55883fcf01081e8ff83dd96442267471ec6a Mon Sep 17 00:00:00 2001
From: Bozhidar Batsov <bozhidar.batsov@gmail.com>
Date: Sat, 15 Oct 2011 13:04:02 +0300
Subject: [PATCH] added basic customization support

---
 init.el                               |   4 +
 modules/prelude-c.el                  |  17 +-
 modules/prelude-clojure.el            |  13 +-
 modules/prelude-coffee.el             |  12 +-
 modules/prelude-common-lisp.el        |  40 ++++-
 modules/prelude-core.el               |   5 +
 modules/prelude-editor.el             |   9 ++
 modules/prelude-emacs-lisp.el         |  25 ++-
 modules/prelude-global-keybindings.el | 222 ++++++++++++++------------
 modules/prelude-perl.el               |  12 +-
 modules/prelude-ruby.el               |  12 +-
 modules/prelude-ui.el                 |  72 ++++++---
 12 files changed, 297 insertions(+), 146 deletions(-)

diff --git a/init.el b/init.el
index d6625fb..6789854 100644
--- a/init.el
+++ b/init.el
@@ -33,6 +33,10 @@
 
 ;;; Code:
 
+(defgroup prelude nil
+  "Emacs Prelude"
+  :group 'convenience)
+
 ;; On OS X Emacs doesn't use the shell PATH if it's not started from
 ;; the shell. If you're using homebrew modifying the PATH is essential.
 (if (string= system-type "darwin")
diff --git a/modules/prelude-c.el b/modules/prelude-c.el
index 58c525a..b864a4e 100644
--- a/modules/prelude-c.el
+++ b/modules/prelude-c.el
@@ -32,13 +32,24 @@
 
 ;;; Code:
 
+;; customize
+(defgroup c nil
+  "Emacs Prelude C programming support"
+  :group 'prelude)
+
+(defcustom prelude-enable-c-hook t
+  "Enable Prelude's default C hook."
+  :type 'boolean
+  :group 'c)
+
 (defun prelude-c-coding-hook ()
   (setq c-basic-offset 4)
   (prelude-coding-hook))
 
-;; this will affect all modes derived from cc-mode, like
-;; java-mode, php-mode, etc
-(add-hook 'c-mode-common-hook 'prelude-c-coding-hook)
+(when prelude-enable-c-hook
+  ;; this will affect all modes derived from cc-mode, like
+  ;; java-mode, php-mode, etc
+  (add-hook 'c-mode-common-hook 'prelude-c-coding-hook))
 
 (provide 'prelude-c)
 
diff --git a/modules/prelude-clojure.el b/modules/prelude-clojure.el
index 78d1404..0b8221c 100644
--- a/modules/prelude-clojure.el
+++ b/modules/prelude-clojure.el
@@ -32,6 +32,16 @@
 
 ;;; Code:
 
+;; customize
+(defgroup clojure nil
+  "Emacs Prelude Clojure programming support"
+  :group 'prelude)
+
+(defcustom prelude-enable-clojure-hook t
+  "Enable Prelude's Clojure hook."
+  :type 'boolean
+  :group 'clojure)
+
 (require 'prelude-lisp)
 
 ;; To start SLIME in your Clojure project:
@@ -39,7 +49,8 @@
 ;; 2. Invoke M-x clojure-jack-in from a project
 (require 'clojure-mode)
 
-(add-hook 'clojure-mode-hook 'prelude-lisp-coding-hook)
+(when prelude-enable-clojure-hook
+  (add-hook 'clojure-mode-hook 'prelude-lisp-coding-hook))
 
 (provide 'prelude-clojure)
 
diff --git a/modules/prelude-coffee.el b/modules/prelude-coffee.el
index a3e06e5..707ef99 100644
--- a/modules/prelude-coffee.el
+++ b/modules/prelude-coffee.el
@@ -32,6 +32,15 @@
 
 ;;; Code:
 
+(defgroup coffee nil
+  "Emacs Prelude CoffeeScript support"
+  :group 'prelude)
+
+(defcustom prelude-enable-coffee-hook t
+  "Enable Prelude's CoffeeScript's hook"
+  :type 'boolean
+  :group 'coffee)
+
 (require 'coffee-mode)
 
 (defun prelude-coffee-mode-hook ()
@@ -64,7 +73,8 @@
        (file-exists-p (coffee-compiled-file-name))
        (coffee-cos-mode t)))
 
-(add-hook 'coffee-mode-hook 'prelude-coffee-mode-hook)
+(when prelude-enable-coffee-hook
+ (add-hook 'coffee-mode-hook 'prelude-coffee-mode-hook))
 
 (provide 'prelude-coffee)
 
diff --git a/modules/prelude-common-lisp.el b/modules/prelude-common-lisp.el
index da9411e..96047d3 100644
--- a/modules/prelude-common-lisp.el
+++ b/modules/prelude-common-lisp.el
@@ -32,9 +32,30 @@
 
 ;;; Code:
 
+(defgroup common-lisp nil
+  "Prelude's Common Lisp support"
+  :group 'prelude)
+
+(defcustom prelude-start-slime-automatically t
+  "Start SLIME automatically the first time a .list file is opened."
+  :type 'boolean
+  :group 'common-lisp)
+
+(defcustom prelude-enable-common-lisp-hook t
+  "Enable Prelude's Common Lisp hook"
+  :type 'boolean
+  :group 'common-lisp)
+
+(defcustom prelude-load-common-lisp-slime-automatically nil
+  "Load Common Lisp's SLIME by default. Setting this to `t' is not a
+very good idea if you're programming on occasion in both Clojure and
+Common Lisp."
+  :type 'boolean
+  :group 'common-lisp)
+
 (require 'prelude-lisp)
 
-;; the SBCL configuration file is in Common Lisp 
+;; the SBCL configuration file is in Common Lisp
 (add-to-list 'auto-mode-alist '("\\.sbclrc$" . lisp-mode))
 
 ;; Use SLIME from Quicklisp
@@ -43,8 +64,7 @@
   ;; Common Lisp support depends on SLIME being installed with Quicklisp
   (if (file-exists-p (expand-file-name "~/quicklisp/slime-helper.el"))
       (load (expand-file-name "~/quicklisp/slime-helper.el"))
-    (message "%s" "SLIME is not installed. Use Quicklisp to install it."))
-  )
+    (message "%s" "SLIME is not installed. Use Quicklisp to install it.")))
 
 ;; a list of alternative Common Lisp implementations that can be
 ;; used with SLIME. Note that their presence render
@@ -58,17 +78,23 @@
         (sbcl ("sbcl" "--noinform") :coding-system utf-8-unix)))
 
 ;; select the default value from slime-lisp-implementations
-(setq slime-default-lisp 'sbcl)
+(if (string= system-type "darwin")
+    ;; default to Clozure CL on OS X
+    (setq slime-default-lisp 'ccl)
+  ;; default to SBCL on Linux and Windows
+  (setq slime-default-lisp 'sbcl))
 
-(add-hook 'lisp-mode-hook 'prelude-lisp-coding-hook)
-(add-hook 'slime-repl-mode-hook 'prelude-interactive-lisp-coding-hook)
+(when prelude-enable-common-lisp-hook
+  (add-hook 'lisp-mode-hook 'prelude-lisp-coding-hook)
+  (add-hook 'slime-repl-mode-hook 'prelude-interactive-lisp-coding-hook))
 
 ;; start slime automatically when we open a lisp file
 (defun prelude-start-slime ()
   (unless (slime-connected-p)
     (save-excursion (slime))))
 
-(add-hook 'slime-mode-hook 'prelude-start-slime)
+(when prelude-start-slime-automatically
+  (add-hook 'slime-mode-hook 'prelude-start-slime))
 
 ;; Stop SLIME's REPL from grabbing DEL,
 ;; which is annoying when backspacing over a '('
diff --git a/modules/prelude-core.el b/modules/prelude-core.el
index d628769..883632b 100644
--- a/modules/prelude-core.el
+++ b/modules/prelude-core.el
@@ -36,6 +36,11 @@
 (require 'thingatpt)
 (require 'imenu)
 
+;; customization
+(defgroup core nil
+  "Emacs Prelude core"
+  :group 'prelude)
+
 (defun prelude-add-subfolders-to-load-path (parent-dir)
   "Adds all first level `parent-dir' subdirs to the
 Emacs load path."
diff --git a/modules/prelude-editor.el b/modules/prelude-editor.el
index 45f1c60..17a94b8 100644
--- a/modules/prelude-editor.el
+++ b/modules/prelude-editor.el
@@ -32,6 +32,11 @@
 
 ;;; Code:
 
+;; customize
+(defgroup editor nil
+  "Emacs Prelude Editor enhancements"
+  :group 'prelude)
+
 ;; Emacs users obviously have little need for Command and Option keys,
 ;; but they do need Meta and Super
 (when (string= system-type "darwin")
@@ -160,6 +165,10 @@
 (require 'yasnippet) ;; not yasnippet-bundle
 (yas/initialize)
 
+;; dispense of trailing whitespace once and for all
+(add-hook 'before-save-hook
+          'delete-trailing-whitespace)
+
 ;; projectile is a project management mode
 (require 'projectile)
 (projectile-global-mode t)
diff --git a/modules/prelude-emacs-lisp.el b/modules/prelude-emacs-lisp.el
index 2052c27..ae0a354 100644
--- a/modules/prelude-emacs-lisp.el
+++ b/modules/prelude-emacs-lisp.el
@@ -32,17 +32,17 @@
 
 ;;; Code:
 
+(defgroup emacs-lisp nil
+  "Prelude support for Emacs Lisp"
+  :group 'prelude)
+
+(defcustom prelude-enable-emacs-lisp-hook t
+  "Enable Prelude's Emacs Lisp hook"
+  :type 'boolean
+  :group 'emacs-lisp)
 
 (require 'prelude-lisp)
 
-(add-hook 'emacs-lisp-mode-hook 'turn-on-eldoc-mode)
-(add-hook 'emacs-lisp-mode-hook 'prelude-remove-elc-on-save)
-
-(add-hook 'emacs-lisp-mode-hook 'prelude-lisp-coding-hook)
-
-(add-hook 'ielm-mode-hook 'prelude-interactive-lisp-coding-hook)
-(add-hook 'ielm-mode-hook 'turn-on-eldoc-mode)
-
 (defun prelude-remove-elc-on-save ()
   "If you're saving an elisp file, likely the .elc is no longer valid."
   (make-local-variable 'after-save-hook)
@@ -51,6 +51,15 @@
               (if (file-exists-p (concat buffer-file-name "c"))
                   (delete-file (concat buffer-file-name "c"))))))
 
+(when prelude-enable-emacs-lisp-hook
+  (add-hook 'emacs-lisp-mode-hook 'turn-on-eldoc-mode)
+  (add-hook 'emacs-lisp-mode-hook 'prelude-remove-elc-on-save)
+
+  (add-hook 'emacs-lisp-mode-hook 'prelude-lisp-coding-hook)
+
+  (add-hook 'ielm-mode-hook 'prelude-interactive-lisp-coding-hook)
+  (add-hook 'ielm-mode-hook 'turn-on-eldoc-mode))
+
 (define-key emacs-lisp-mode-map (kbd "M-.") 'find-function-at-point)
 
 (provide 'prelude-emacs-lisp)
diff --git a/modules/prelude-global-keybindings.el b/modules/prelude-global-keybindings.el
index 12f4493..2cf2a07 100644
--- a/modules/prelude-global-keybindings.el
+++ b/modules/prelude-global-keybindings.el
@@ -32,120 +32,132 @@
 
 ;;; Code:
 
-;; You know, like Readline.
-(global-set-key (kbd "C-M-h") 'backward-kill-word)
+(defcustom prelude-enable-additional-keybindings t
+  "Enable Prelude additional global keybindings"
+  :type 'boolean
+  :group 'prelude)
 
-;; Align your code in a pretty way.
-(global-set-key (kbd "C-x \\") 'align-regexp)
+(defcustom prelude-disable-arrow-navigation t
+  "Disable arrow navigation"
+  :type 'boolean
+  :group 'prelude)
 
-;; Perform general cleanup.
-(global-set-key (kbd "C-c n") 'prelude-cleanup-buffer)
+(when prelude-enable-additional-keybindings
+  ;; You know, like Readline.
+  (global-set-key (kbd "C-M-h") 'backward-kill-word)
 
-;; Font size
-(define-key global-map (kbd "C-+") 'text-scale-increase)
-(define-key global-map (kbd "C--") 'text-scale-decrease)
+  ;; Align your code in a pretty way.
+  (global-set-key (kbd "C-x \\") 'align-regexp)
 
-;; Jump to a definition in the current file. (This is awesome.)
-(global-set-key (kbd "M-i") 'prelude-ido-goto-symbol)
+  ;; Perform general cleanup.
+  (global-set-key (kbd "C-c n") 'prelude-cleanup-buffer)
 
-;; File finding
-(global-set-key (kbd "C-x f") 'prelude-recentf-ido-find-file)
-(global-set-key (kbd "C-c r") 'bury-buffer)
-(global-set-key (kbd "M-`") 'file-cache-minibuffer-complete)
+  ;; Font size
+  (define-key global-map (kbd "C-+") 'text-scale-increase)
+  (define-key global-map (kbd "C--") 'text-scale-decrease)
 
-;; Window switching. (C-x o goes to the next window)
-(global-set-key (kbd "C-x O") (lambda ()
-                                (interactive)
-                                (other-window -1))) ;; back one
+  ;; Jump to a definition in the current file. (This is awesome.)
+  (global-set-key (kbd "M-i") 'prelude-ido-goto-symbol)
 
-;; Indentation help
-(global-set-key (kbd "C-x ^") 'join-line)
-(global-set-key (kbd "C-M-\\") 'prelude-indent-region-or-buffer)
+  ;; File finding
+  (global-set-key (kbd "C-x f") 'prelude-recentf-ido-find-file)
+  (global-set-key (kbd "C-c r") 'bury-buffer)
+  (global-set-key (kbd "M-`") 'file-cache-minibuffer-complete)
 
-;; Start proced in a similar manner to dired
-(global-set-key (kbd "C-x p") 'proced)
-
-;; Start eshell or switch to it if it's active.
-(global-set-key (kbd "C-x m") 'eshell)
-
-;; Start a new eshell even if one is active.
-(global-set-key (kbd "C-x M") (lambda () (interactive) (eshell t)))
-
-;; Start a regular shell if you prefer that.
-(global-set-key (kbd "C-x M-m") 'shell)
-
-;; If you want to be able to M-x without meta
-(global-set-key (kbd "C-x C-m") 'execute-extended-command)
-
-;; Fetch the contents at a URL, display it raw.
-(global-set-key (kbd "C-x C-h") 'prelude-view-url)
-
-;; A complementary binding to the apropos-command(C-h a)
-(global-set-key (kbd "C-h A") 'apropos)
-
-;; Should be able to eval-and-replace anywhere.
-(global-set-key (kbd "C-c e") 'prelude-eval-and-replace)
-
-;; Magit rules!
-(global-set-key (kbd "C-x g") 'magit-status)
-
-;; Activate occur easily inside isearch
-(define-key isearch-mode-map (kbd "C-o")
-  (lambda () (interactive)
-    (let ((case-fold-search isearch-case-fold-search))
-      (occur (if isearch-regexp
-                 isearch-string
-               (regexp-quote isearch-string))))))
-
-;; cycle through buffers
-(global-set-key (kbd "<C-tab>") 'bury-buffer)
-
-;; use hippie-expand instead of dabbrev
-(global-set-key (kbd "M-/") 'hippie-expand)
-
-;; spell check Bulgarian text
-(global-set-key (kbd "C-c B")
-                (lambda()(interactive)
-                  (ispell-change-dictionary "bulgarian")
-                  (flyspell-buffer)))
-
-;; replace buffer-menu with ibuffer
-(global-set-key (kbd "C-x C-b") 'ibuffer)
-
-;; swap windows
-(global-set-key (kbd "C-c s") 'prelude-swap-windows)
-
-;; duplicate the current line or region
-(global-set-key (kbd "C-c d") 'prelude-duplicate-current-line-or-region)
-
-;; rename buffer & visited file
-(global-set-key (kbd "C-c r") 'prelude-rename-file-and-buffer)
-
-;; open an ansi-term buffer
-(global-set-key (kbd "C-x t") 'prelude-visit-term-buffer)
-
-;; toggle input method
-(global-set-key (kbd "C-\\") 'prelude-toggle-bulgarian-input-method)
-
-;; search with google
-(global-set-key (kbd "C-c g") 'prelude-google)
-
-;; toggle menu-bar visibility
-(global-set-key (kbd "<f12>") 'menu-bar-mode)
-
-;; real Emacs hackers don't use the arrow keys
-(global-set-key (kbd "<up>") (lambda ()
-                               (interactive)
-                               (message "Arrow key navigation is disabled. Use C-p instead.")))
-(global-set-key (kbd "<down>") (lambda ()
-                                 (interactive)
-                                 (message "Arrow key navigation is disabled. Use C-n instead.")))
-(global-set-key (kbd "<left>") (lambda ()
-                                 (interactive)
-                                 (message "Arrow key navigation is disabled. Use C-b instead.")))
-(global-set-key (kbd "<right>") (lambda ()
+  ;; Window switching. (C-x o goes to the next window)
+  (global-set-key (kbd "C-x O") (lambda ()
                                   (interactive)
-                                  (message "Arrow key navigation is disabled. Use C-f instead.")))
+                                  (other-window -1))) ;; back one
+
+  ;; Indentation help
+  (global-set-key (kbd "C-x ^") 'join-line)
+  (global-set-key (kbd "C-M-\\") 'prelude-indent-region-or-buffer)
+
+  ;; Start proced in a similar manner to dired
+  (global-set-key (kbd "C-x p") 'proced)
+
+  ;; Start eshell or switch to it if it's active.
+  (global-set-key (kbd "C-x m") 'eshell)
+
+  ;; Start a new eshell even if one is active.
+  (global-set-key (kbd "C-x M") (lambda () (interactive) (eshell t)))
+
+  ;; Start a regular shell if you prefer that.
+  (global-set-key (kbd "C-x M-m") 'shell)
+
+  ;; If you want to be able to M-x without meta
+  (global-set-key (kbd "C-x C-m") 'execute-extended-command)
+
+  ;; Fetch the contents at a URL, display it raw.
+  (global-set-key (kbd "C-x C-h") 'prelude-view-url)
+
+  ;; A complementary binding to the apropos-command(C-h a)
+  (global-set-key (kbd "C-h A") 'apropos)
+
+  ;; Should be able to eval-and-replace anywhere.
+  (global-set-key (kbd "C-c e") 'prelude-eval-and-replace)
+
+  ;; Magit rules!
+  (global-set-key (kbd "C-x g") 'magit-status)
+
+  ;; Activate occur easily inside isearch
+  (define-key isearch-mode-map (kbd "C-o")
+    (lambda () (interactive)
+      (let ((case-fold-search isearch-case-fold-search))
+        (occur (if isearch-regexp
+                   isearch-string
+                 (regexp-quote isearch-string))))))
+
+  ;; cycle through buffers
+  (global-set-key (kbd "<C-tab>") 'bury-buffer)
+
+  ;; use hippie-expand instead of dabbrev
+  (global-set-key (kbd "M-/") 'hippie-expand)
+
+  ;; spell check Bulgarian text
+  (global-set-key (kbd "C-c B")
+                  (lambda()(interactive)
+                    (ispell-change-dictionary "bulgarian")
+                    (flyspell-buffer)))
+
+  ;; replace buffer-menu with ibuffer
+  (global-set-key (kbd "C-x C-b") 'ibuffer)
+
+  ;; swap windows
+  (global-set-key (kbd "C-c s") 'prelude-swap-windows)
+
+  ;; duplicate the current line or region
+  (global-set-key (kbd "C-c d") 'prelude-duplicate-current-line-or-region)
+
+  ;; rename buffer & visited file
+  (global-set-key (kbd "C-c r") 'prelude-rename-file-and-buffer)
+
+  ;; open an ansi-term buffer
+  (global-set-key (kbd "C-x t") 'prelude-visit-term-buffer)
+
+  ;; toggle input method
+  (global-set-key (kbd "C-\\") 'prelude-toggle-bulgarian-input-method)
+
+  ;; search with google
+  (global-set-key (kbd "C-c g") 'prelude-google)
+
+  ;; toggle menu-bar visibility
+  (global-set-key (kbd "<f12>") 'menu-bar-mode))
+
+(when prelude-disable-arrow-navigation
+  ;; real Emacs hackers don't use the arrow keys
+  (global-set-key (kbd "<up>") (lambda ()
+                                 (interactive)
+                                 (message "Arrow key navigation is disabled. Use C-p instead.")))
+  (global-set-key (kbd "<down>") (lambda ()
+                                   (interactive)
+                                   (message "Arrow key navigation is disabled. Use C-n instead.")))
+  (global-set-key (kbd "<left>") (lambda ()
+                                   (interactive)
+                                   (message "Arrow key navigation is disabled. Use C-b instead.")))
+  (global-set-key (kbd "<right>") (lambda ()
+                                    (interactive)
+                                    (message "Arrow key navigation is disabled. Use C-f instead."))))
 
 (provide 'prelude-global-keybindings)
 
diff --git a/modules/prelude-perl.el b/modules/prelude-perl.el
index 18a98ff..54f62ce 100644
--- a/modules/prelude-perl.el
+++ b/modules/prelude-perl.el
@@ -32,6 +32,15 @@
 
 ;;; Code:
 
+(defgroup perl nil
+  "Emacs Prelude Perl support."
+  :group 'prelude)
+
+(defcustom prelude-enable-perl-hook t
+  "Enable Prelude's Perl hook"
+  :type 'boolean
+  :group 'perl)
+
 ;; use cperl-mode instead of perl-mode
 (defalias 'perl-mode 'cperl-mode)
 
@@ -56,7 +65,8 @@
   (set-face-background 'cperl-hash-face nil)
   (setq cperl-invalid-face nil))
 
-(add-hook 'cperl-mode-hook 'prelude-cperl-mode-hook t)
+(when prelude-enable-perl-hook
+ (add-hook 'cperl-mode-hook 'prelude-cperl-mode-hook t))
 
 (provide 'prelude-perl)
 
diff --git a/modules/prelude-ruby.el b/modules/prelude-ruby.el
index 5888ee7..a1c7f2e 100644
--- a/modules/prelude-ruby.el
+++ b/modules/prelude-ruby.el
@@ -32,6 +32,15 @@
 
 ;;; Code:
 
+(defgroup ruby nil
+  "Emacs Prelude Ruby support"
+  :group 'prelude)
+
+(defcustom prelude-enable-ruby-hook t
+  "Enable Prelude's Ruby hook"
+  :type 'boolean
+  :group 'ruby)
+
 ;; Rake files are ruby, too, as are gemspecs, rackup files, and gemfiles.
 (add-to-list 'auto-mode-alist '("\\.rake$" . ruby-mode))
 (add-to-list 'auto-mode-alist '("Rakefile$" . ruby-mode))
@@ -63,7 +72,8 @@
   (ruby-block-mode t)
   (local-set-key (kbd "C-h r") 'yari))
 
-(add-hook 'ruby-mode-hook 'prelude-ruby-mode-hook)
+(when prelude-enable-ruby-hook
+ (add-hook 'ruby-mode-hook 'prelude-ruby-mode-hook))
 
 (require 'haml-mode)
 (require 'scss-mode)
diff --git a/modules/prelude-ui.el b/modules/prelude-ui.el
index c59438a..ad33a23 100644
--- a/modules/prelude-ui.el
+++ b/modules/prelude-ui.el
@@ -33,34 +33,68 @@
 
 ;;; Code:
 
-;; the toolbar is just a waste of valuable screen estate
-(tool-bar-mode -1)
-;; the menu bar is mostly useless as well
-;; but removing it under OS X doesn't make much sense
-(unless (string= system-type "darwin")
-  (menu-bar-mode -1))
-;; the blinking cursor is nothing, but an annoyance
-(blink-cursor-mode -1)
+;; customization
+(defgroup ui nil
+  "Emacs Prelude UI"
+  :group 'prelude)
 
-;; disable startup screen
-(setq inhibit-startup-screen t)
+(defcustom prelude-use-minimalistic-ui t
+  "If set to true Prelude will dispense of most the UI that's mouse related - 
+menu bar, tool bar, etc"
+  :type 'boolean
+  :group 'ui)
 
-;; nice scrolling
-(setq scroll-margin 0
-      scroll-conservatively 100000
-      scroll-preserve-screen-position 1)
+(defcustom prelude-use-smooth-scrolling t
+  "Overrides the default scrolling behavior with a much more common one."
+  :type 'boolean
+  :group 'ui)
 
-;; mode line settings
-(line-number-mode t)                    
-(column-number-mode t)                  
-(size-indication-mode t)                
+(defcustom prelude-use-default-prelude-theme t
+  "If set to true Prelude will load up its default theme (Zenburn),
+instead of Emacs's default theme."
+  :type 'boolean
+  :group 'ui)
+
+(defcustom prelude-enhance-modeline t
+  "If set to true Prelude will augment the default modeline settings."
+  :type 'boolean
+  :group 'ui)
+
+
+(when prelude-use-minimalistic-ui
+ ;; the toolbar is just a waste of valuable screen estate
+ (tool-bar-mode -1)
+ ;; the menu bar is mostly useless as well
+ ;; but removing it under OS X doesn't make much sense
+ (unless (string= system-type "darwin")
+   (menu-bar-mode -1))
+ ;; the blinking cursor is nothing, but an annoyance
+ (blink-cursor-mode -1)
+
+ ;; disable startup screen
+ (setq inhibit-startup-screen t))
+
+
+(when prelude-use-smooth-scrolling
+ ;; nice scrolling
+ (setq scroll-margin 0
+       scroll-conservatively 100000
+       scroll-preserve-screen-position 1))
+
+(when prelude-enhance-modeline
+ ;; mode line settings
+ (line-number-mode t)
+ (column-number-mode t)
+ (size-indication-mode t))
 
 ;; enable y/n answers
 (fset 'yes-or-no-p 'y-or-n-p)
 
 ;; custom Emacs 24 color themes support
 (add-to-list 'custom-theme-load-path (concat prelude-dir "themes/"))
-(load-theme 'zenburn t)
+
+(when prelude-use-default-prelude-theme
+  (load-theme 'zenburn t))
 
 (provide 'prelude-ui)
 ;;; prelude-ui.el ends here