--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.emacs.d/haskell-mode/haskell-move-nested.el	Mon Apr 21 04:30:59 2014 +0900
@@ -0,0 +1,130 @@
+;;; haskell-move-nested.el --- Change the column of text nested below a line
+
+;; Copyright (C) 2010  Chris Done
+
+;; Author: Chris Done <chrisdone@gmail.com>
+
+;; This file is not part of GNU Emacs.
+
+;; This program is free software: you can redistribute it and/or
+;; modify it under the terms of the GNU General Public License as
+;; published by the Free Software Foundation, either version 3 of
+;; the License, or (at your option) any later version.
+
+;; This program is distributed in the hope that it will be
+;; useful, but WITHOUT ANY WARRANTY; without even the implied
+;; warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+;; PURPOSE.  See the GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public
+;; License along with this program.  If not, see
+;; <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This module is intended for Haskell mode users, but is
+;; independent of Haskell mode.
+
+;; Example usage:
+
+;; (define-key haskell-mode-map (kbd "C-,") 'haskell-move-nested-left)
+;; (define-key haskell-mode-map (kbd "C-.") 'haskell-move-nested-right)
+
+;;; Code:
+
+;;;###autoload
+(defun haskell-move-nested (cols)
+  "Shift the nested off-side-rule block adjacent to point by COLS columns to the right.
+
+In Transient Mark mode, if the mark is active, operate on the contents
+of the region instead.
+"
+  (save-excursion
+    (if (and transient-mark-mode mark-active)
+        (progn
+          (indent-rigidly (region-beginning) (region-end) cols)
+          (setq deactivate-mark nil))
+      (let ((region (haskell-move-nested-region)))
+        (when region
+          (indent-rigidly (car region) (cdr region) cols))))))
+
+;;;###autoload
+(defun haskell-move-nested-right (cols)
+  "Increase indentation of the following off-side-rule block adjacent to point.
+
+Use a numeric prefix argument to indicate amount of indentation to apply.
+
+In Transient Mark mode, if the mark is active, operate on the contents
+of the region instead."
+  (interactive "p")
+  (haskell-move-nested cols)
+  )
+
+;;;###autoload
+(defun haskell-move-nested-left (cols)
+  "Decrease indentation of the following off-side-rule block adjacent to point.
+
+Use a numeric prefix argument to indicate amount of indentation to apply.
+
+In Transient Mark mode, if the mark is active, operate on the contents
+of the region instead."
+  (interactive "p")
+  (haskell-move-nested (- cols))
+  )
+
+(defun haskell-move-nested-region ()
+  "Infer region off-side-rule block adjacent to point.
+Used by `haskell-move-nested'.
+"
+  (save-excursion
+    (let ((starting-level (current-column)))
+      (forward-line)
+      (let ((current-level (haskell-move-nested-indent-level)))
+        (let ((start-point (line-beginning-position))
+              (start-end-point (line-end-position))
+              (end-point nil)
+              (last-line 0))
+          (forward-line)
+          (while (and (not (= (line-beginning-position) last-line))
+                      (or (> (haskell-move-nested-indent-level) starting-level)
+                          (and (> current-level starting-level)
+                               (>= (haskell-move-nested-indent-level) current-level))))
+            (setq last-line (line-beginning-position))
+            (setq end-point (line-end-position))
+            (forward-line))
+          (cons start-point (or end-point
+                                start-end-point)))))))
+
+(defun haskell-move-nested-indent-level ()
+  (max
+   0
+   (1- (length
+        (buffer-substring-no-properties
+         (line-beginning-position)
+         (or (save-excursion (goto-char (line-beginning-position))
+                             (search-forward-regexp "[^ ]" (line-end-position) t 1))
+             (line-beginning-position)))))))
+
+(defun haskell-kill-nested ()
+  "Kill the nested region after point."
+  (interactive)
+  (let ((start (point))
+        (reg (save-excursion
+               (search-backward-regexp "^[ ]+" (line-beginning-position) t 1)
+               (search-forward-regexp "[^ ]" (line-end-position) t 1)
+               (haskell-move-nested-region))))
+    (kill-region start (cdr reg))))
+
+(defun haskell-delete-nested ()
+  "Kill the nested region after point."
+  (interactive)
+  (let ((start (point))
+        (reg (save-excursion
+               (search-backward-regexp "^[ ]+" (line-beginning-position) t 1)
+               (search-forward-regexp "[^ ]" (line-end-position) t 1)
+               (haskell-move-nested-region))))
+    (delete-region start (cdr reg))))
+
+(provide 'haskell-move-nested)
+
+;;; haskell-move-nested.el ends here