Clean up `prelude-cleanup-buffer` code

- Create a macro `with-region-or-buffer` to replace the prelude wrapper
  around `untabify` and `indent-region`
- Remove the function operated on buffers, cause we only need the dwim
  one

core/prelude-core.el

@@ -158,23 +158,6 @@ point reaches the beginning or end of the buffer, stop there."
 (global-set-key [remap move-beginning-of-line]
                 'prelude-move-beginning-of-line)
 
-(defun prelude-indent-buffer ()
-  "Indent the currently visited buffer."
-  (interactive)
-  (indent-region (point-min) (point-max)))
-
-(defun prelude-indent-buffer-or-region ()
-  "Indent a region if selected, otherwise the whole buffer."
-  (interactive)
-  (save-excursion
-    (if (region-active-p)
-        (progn
-          (indent-region (region-beginning) (region-end))
-          (message "Indented selected region."))
-      (progn
-        (prelude-indent-buffer)
-        (message "Indented buffer.")))))
-
 (defun prelude-indent-defun ()
   "Indent the current defun."
   (interactive)
@@ -286,43 +269,11 @@ there's a region, all lines that region covers will be duplicated."
     (cond ((search-forward "<?xml" nil t) (nxml-mode))
           ((search-forward "<html" nil t) (html-mode)))))
 
-(defun prelude-untabify-buffer ()
-  "Remove all tabs from the current buffer."
-  (interactive)
-  (untabify (point-min) (point-max)))
-
-(defun prelude-untabify-buffer-or-region ()
-  "Untabify a region if selected, otherwise the whole buffer."
-  (interactive)
-  (save-excursion
-    (if (region-active-p)
-        (progn
-          (untabify (region-beginning) (region-end))
-          (message "Untabify selected region."))
-      (progn
-        (prelude-untabify-buffer)
-        (message "Untabify buffer.")))))
-
-(defun prelude-cleanup-buffer ()
-  "Perform a bunch of operations on the whitespace content of a buffer."
-  (interactive)
-  (prelude-untabify-buffer)
-  (prelude-indent-buffer)
-  (whitespace-cleanup))
-
 (defun prelude-cleanup-buffer-or-region ()
   "Cleanup a region if selected, otherwise the whole buffer."
   (interactive)
-  (save-excursion
-    (if (region-active-p)
-        (progn
-          (untabify (region-beginning) (region-end))
-          (indent-region (region-beginning) (region-end))
-          (message "Cleanup selected region."))
-      (progn
-        (prelude-untabify-buffer)
-        (prelude-indent-buffer)
-        (message "Cleanup buffer."))))
+  (call-interactively 'untabify)
+  (call-interactively 'indent-region)
   (whitespace-cleanup))
 
 (defun prelude-eval-and-replace ()

core/prelude-editor.el

@@ -285,6 +285,17 @@ The body of the advice is in BODY."
   (interactive
    (list (not (region-active-p)))))
 
+(defmacro with-region-or-buffer (func)
+  "When called with no active region, call FUNC on current buffer."
+  `(defadvice ,func (before with-region-or-buffer activate compile)
+     (interactive
+      (if mark-active
+          (list (region-beginning) (region-end))
+        (list (point-min) (point-max))))))
+
+(with-region-or-buffer indent-region)
+(with-region-or-buffer untabify)
+
 ;; automatically indenting yanked text if in programming-modes
 (defvar yank-indent-modes
   '(LaTeX-mode TeX-mode)

core/prelude-mode.el

@@ -50,7 +50,6 @@
     (define-key map [(meta shift down)]  'move-text-down)
     (define-key map (kbd "C-c n") 'prelude-cleanup-buffer-or-region)
     (define-key map (kbd "C-c f")  'prelude-recentf-ido-find-file)
-    (define-key map (kbd "C-M-\\") 'prelude-indent-buffer-or-region)
     (define-key map (kbd "C-M-z") 'prelude-indent-defun)
     (define-key map (kbd "C-c u") 'prelude-view-url)
     (define-key map (kbd "C-c e") 'prelude-eval-and-replace)
@@ -93,7 +92,6 @@
                          ["Copy file name to clipboard" prelude-copy-file-name-to-clipboard])
 
                         ("Buffers"
-                         ["Clean up buffer" prelude-cleanup-buffer]
                          ["Clean up buffer or region" prelude-cleanup-buffer-or-region]
                          ["Kill other buffers" prelude-kill-other-buffers])
 
@@ -101,10 +99,6 @@
                          ["Insert empty line" prelude-insert-empty-line]
                          ["Move line up" prelude-move-line-up]
                          ["Move line down" prelude-move-line-down]
-                         ["Indent buffer" prelude-indent-buffer]
-                         ["Indent buffer or region" prelude-indent-buffer-or-region]
-                         ["Untabify buffer" prelude-untabify-buffer]
-                         ["Untabify buffer or region" prelude-untabify-buffer-or-region]
                          ["Duplicate line or region" prelude-duplicate-current-line-or-region]
                          ["Indent rigidly and copy to clipboard" prelude-indent-rigidly-and-copy-to-clipboard]
                          ["Insert date" prelude-insert-date]