mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-23 07:19:15 +00:00
128 lines
4.7 KiB
EmacsLisp
128 lines
4.7 KiB
EmacsLisp
;;; windows.el --- GNU Emacs window commands aside from those written in C.
|
|
;;; Copyright (C) 1985, 1989, 1992 Free Software Foundation, Inc.
|
|
|
|
;; This file is part of GNU Emacs.
|
|
|
|
;; GNU Emacs 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 2, or (at your option)
|
|
;; any later version.
|
|
|
|
;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
|
|
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
|
|
(defun count-windows (&optional minibuf)
|
|
"Returns the number of visible windows.
|
|
Optional arg NO-MINI non-nil means don't count the minibuffer
|
|
even if it is active."
|
|
(let ((count 0))
|
|
(walk-windows (function (lambda ()
|
|
(setq count (+ count 1))))
|
|
minibuf)
|
|
count))
|
|
|
|
(defun balance-windows ()
|
|
"Makes all visible windows the same size (approximately)."
|
|
(interactive)
|
|
(let ((count 0))
|
|
(walk-windows (function (lambda (w)
|
|
(setq count (+ count 1))))
|
|
'nomini)
|
|
(let ((size (/ (screen-height) count)))
|
|
(walk-windows (function (lambda (w)
|
|
(select-window w)
|
|
(enlarge-window (- size (window-height)))))
|
|
'nomini))))
|
|
|
|
;;; I think this should be the default; I think people will prefer it--rms.
|
|
|
|
(defvar split-window-keep-point t
|
|
"*If non-nil, split windows so that both windows keep the original
|
|
value of point. This is often more convenient for editing.
|
|
If nil, split windows to minimize redisplay. This is convenient on
|
|
slow terminals, but point may be moved strangely to accommodate the
|
|
redisplay.")
|
|
|
|
(defun split-window-vertically (&optional arg)
|
|
"Split current window into two windows, one above the other.
|
|
The uppermost window gets ARG lines and the other gets the rest.
|
|
With no argument, split equally or close to it.
|
|
Both windows display the same buffer now current.
|
|
|
|
If the variable split-window-keep-point is non-nil, both new windows
|
|
will get the same value of point as the current window. This is often
|
|
more convenient for editing.
|
|
|
|
Otherwise, we chose window starts so as to minimize the amount of
|
|
redisplay; this is convenient on slow terminals. The new selected
|
|
window is the one that the current value of point appears in. The
|
|
value of point can change if the text around point is hidden by the
|
|
new mode line."
|
|
(interactive "P")
|
|
(let ((old-w (selected-window))
|
|
(old-point (point))
|
|
new-w bottom switch)
|
|
(setq new-w (split-window nil (and arg (prefix-numeric-value arg))))
|
|
(or split-window-keep-point
|
|
(progn
|
|
(save-excursion
|
|
(set-buffer (window-buffer))
|
|
(goto-char (window-start))
|
|
(vertical-motion (window-height))
|
|
(set-window-start new-w (point))
|
|
(if (> (point) (window-point new-w))
|
|
(set-window-point new-w (point)))
|
|
(vertical-motion -1)
|
|
(setq bottom (point)))
|
|
(if (<= bottom (point))
|
|
(set-window-point old-w (1- bottom)))
|
|
(if (< (window-start new-w) old-point)
|
|
(progn
|
|
(set-window-point new-w old-point)
|
|
(select-window new-w)))))))
|
|
|
|
(defun split-window-horizontally (&optional 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))
|
|
|
|
(defun window-config-to-register (name)
|
|
"Save the current window configuration in register REG (a letter).
|
|
It can be later retrieved using \\[M-x register-to-window-config]."
|
|
(interactive "cSave window configuration in register: ")
|
|
(set-register name (current-window-configuration)))
|
|
|
|
(defun register-to-window-config (name)
|
|
"Restore (make current) the window configuration in register REG (a letter).
|
|
Use with a register previously set with \\[window-config-to-register]."
|
|
(interactive "cRestore window configuration from register: ")
|
|
(set-window-configuration (get-register name)))
|
|
|
|
(define-key ctl-x-map "2" 'split-window-vertically)
|
|
(define-key ctl-x-map "3" 'split-window-horizontally)
|
|
(define-key ctl-x-map "6" 'window-config-to-register)
|
|
(define-key ctl-x-map "7" 'register-to-window-config)
|
|
(define-key ctl-x-map "}" 'enlarge-window-horizontally)
|
|
(define-key ctl-x-map "{" 'shrink-window-horizontally)
|
|
|
|
;;; windows.el ends here
|