gnu1987/emacs18.41/lisp/window.el

;; GNU Emacs window commands aside from those written in C.
;; Copyright (C) 1985 Free Software Foundation, Inc.

;; This file is part of GNU Emacs.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY.  No author or distributor
;; accepts responsibility to anyone for the consequences of using it
;; or for whether it serves any particular purpose or works at all,
;; unless he says so in writing.  Refer to the GNU Emacs General Public
;; License for full details.

;; Everyone is granted permission to copy, modify and redistribute
;; GNU Emacs, but only under the conditions described in the
;; GNU Emacs General Public License.   A copy of this license is
;; supposed to have been given to you along with GNU Emacs so you
;; can know your rights and responsibilities.  It should be in a
;; file named COPYING.  Among other things, the copyright notice
;; and this notice must be preserved on all copies.


(defun split-window-vertically (arg)
  "Split current window into two windows, one above the other.
This window becomes the uppermost of the two, and gets
ARG lines.  No arg means split equally."
  (interactive "P")
  (split-window nil (and arg (prefix-numeric-value arg))))

(defun split-window-horizontally (arg)
  "Split current window into two windows side by side.
This window becomes the leftmost of the two, and gets
ARG columns.  No arg means split equally."
  (interactive "P")
  (split-window nil (and arg (prefix-numeric-value arg)) t))

(defun enlarge-window-horizontally (arg)
  "Make current window ARG columns wider."
  (interactive "p")
  (enlarge-window arg t))

(defun shrink-window-horizontally (arg)
  "Make current window ARG columns narrower."
  (interactive "p")
  (shrink-window arg t))

(define-key ctl-x-map "2" 'split-window-vertically)
(define-key ctl-x-map "5" 'split-window-horizontally)
(define-key ctl-x-map "}" 'enlarge-window-horizontally)
(define-key ctl-x-map "{" 'shrink-window-horizontally)