--- /dev/null
+;;; window.el --- XEmacs window commands aside from those written in C.
+
+;; Copyright (C) 1985, 1989, 1993-94, 1997 Free Software Foundation, Inc.
+;; Copyright (C) 1995, 1996 Ben Wing.
+
+;; Maintainer: XEmacs Development Team
+;; Keywords: frames, extensions, dumped
+
+;; This file is part of XEmacs.
+
+;; XEmacs 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.
+
+;; XEmacs 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 XEmacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Synched up with: Emacs/Mule zeta.
+
+;;; Commentary:
+
+;; This file is dumped with XEmacs.
+
+;;; Code:
+
+;;;; Window tree functions.
+
+(defun one-window-p (&optional nomini all-frames device)
+ "Return non-nil if the selected window is the only window (in its frame).
+Optional arg NOMINI non-nil means don't count the minibuffer
+even if it is active.
+
+The optional arg ALL-FRAMES t means count windows on all frames.
+If it is `visible', count windows on all visible frames.
+ALL-FRAMES nil or omitted means count only the selected frame,
+plus the minibuffer it uses (which may be on another frame).
+ALL-FRAMES = 0 means count windows on all visible and iconified frames.
+If ALL-FRAMES is any other value, count only the selected frame.
+
+If optional third argument DEVICE is nil or omitted, count frames
+on all devices.
+If a device, count frames only on that device.
+If a device type, count frames only on devices of that type.
+Otherwise, count frames only on the selected device."
+ (let ((base-window (selected-window)))
+ (if (and nomini (eq base-window (minibuffer-window)))
+ (setq base-window (next-window base-window)))
+ (eq base-window
+ (next-window base-window (if nomini 'arg) all-frames device))))
+
+(defun walk-windows (proc &optional minibuf all-frames device)
+ "Cycle through all visible windows, calling PROC for each one.
+PROC is called with a window as argument.
+
+Optional second arg MINIBUF t means count the minibuffer window even
+if not active. MINIBUF nil or omitted means count the minibuffer iff
+it is active. MINIBUF neither t nor nil means not to count the
+minibuffer even if it is active.
+
+Several frames may share a single minibuffer; if the minibuffer
+counts, all windows on all frames that share that minibuffer count
+too. Therefore, when a separate minibuffer frame is active,
+`walk-windows' includes the windows in the frame from which you
+entered the minibuffer, as well as the minibuffer window. But if the
+minibuffer does not count, only windows from WINDOW's frame count.
+
+ALL-FRAMES is the optional third argument.
+ALL-FRAMES nil or omitted means cycle within the frames as specified above.
+ALL-FRAMES = `visible' means include windows on all visible frames.
+ALL-FRAMES = 0 means include windows on all visible and iconified frames.
+ALL-FRAMES = t means include windows on all frames including invisible frames.
+Anything else means restrict to WINDOW's frame.
+
+If optional fourth argument DEVICE is nil or omitted, include frames
+on all devices.
+If a device, include frames only on that device.
+If a device type, include frames only on devices of that type.
+Otherwise, include frames only on the selected device."
+ ;; If we start from the minibuffer window, don't fail to come back to it.
+ (if (window-minibuffer-p (selected-window))
+ (setq minibuf t))
+ ;; Note that, like next-window & previous-window, this behaves a little
+ ;; strangely if the selected window is on an invisible frame: it hits
+ ;; some of the windows on that frame, and all windows on visible frames.
+ (let* ((walk-windows-start (selected-window))
+ (walk-windows-current walk-windows-start))
+ (while (progn
+ (setq walk-windows-current
+ (next-window walk-windows-current minibuf all-frames
+ device))
+ (funcall proc walk-windows-current)
+ (not (eq walk-windows-current walk-windows-start))))))
+;; The old XEmacs definition of the above clause. It's more correct in
+;; that it will never hit a window that's already been hit even if you
+;; do something odd like `delete-other-windows', but has the problem
+;; that it conses. (This may be called repeatedly, from lazy-lock
+;; for example.)
+; (let* ((walk-windows-history nil)
+; (walk-windows-current (selected-window)))
+; (while (progn
+; (setq walk-windows-current
+; (next-window walk-windows-current minibuf all-frames
+; device))
+; (not (memq walk-windows-current walk-windows-history)))
+; (setq walk-windows-history (cons walk-windows-current
+; walk-windows-history))
+; (funcall proc walk-windows-current))))
+
+(defun minibuffer-window-active-p (window)
+ "Return t if WINDOW (a minibuffer window) is now active."
+ (eq window (active-minibuffer-window)))
+
+(defmacro save-selected-window (&rest body)
+ "Execute BODY, then select the window that was selected before BODY."
+ (list 'let
+ '((save-selected-window-window (selected-window)))
+ (list 'unwind-protect
+ (cons 'progn body)
+ (list 'and ; XEmacs
+ (list 'window-live-p 'save-selected-window-window)
+ (list 'select-window 'save-selected-window-window)))))
+\f
+(defun count-windows (&optional minibuf)
+ "Return the number of visible windows.
+Optional arg MINIBUF non-nil means count the minibuffer
+even if it is inactive."
+ (let ((count 0))
+ (walk-windows (function (lambda (w)
+ (setq count (+ count 1))))
+ minibuf)
+ count))
+
+(defun balance-windows ()
+ "Make all visible windows the same height (approximately)."
+ (interactive)
+ (let ((count -1) levels newsizes size)
+ ;FSFmacs
+ ;;; Don't count the lines that are above the uppermost windows.
+ ;;; (These are the menu bar lines, if any.)
+ ;(mbl (nth 1 (window-edges (frame-first-window (selected-frame))))))
+ ;; Find all the different vpos's at which windows start,
+ ;; then count them. But ignore levels that differ by only 1.
+ (save-window-excursion
+ (let (tops (prev-top -2))
+ (walk-windows (function (lambda (w)
+ (setq tops (cons (nth 1 (window-pixel-edges w))
+ tops))))
+ 'nomini)
+ (setq tops (sort tops '<))
+ (while tops
+ (if (> (car tops) (1+ prev-top))
+ (setq prev-top (car tops)
+ count (1+ count)))
+ (setq levels (cons (cons (car tops) count) levels))
+ (setq tops (cdr tops)))
+ (setq count (1+ count))))
+ ;; Subdivide the frame into that many vertical levels.
+ ;FSFmacs (setq size (/ (- (frame-height) mbl) count))
+ (setq size (/ (window-pixel-height (frame-root-window)) count))
+ (walk-windows (function
+ (lambda (w)
+ (select-window w)
+ (let ((newtop (cdr (assq (nth 1 (window-pixel-edges))
+ levels)))
+ (newbot (or (cdr (assq
+ (+ (window-pixel-height)
+ (nth 1 (window-pixel-edges)))
+ levels))
+ count)))
+ (setq newsizes
+ (cons (cons w (* size (- newbot newtop)))
+ newsizes)))))
+ 'nomini)
+ (walk-windows (function (lambda (w)
+ (select-window w)
+ (let ((newsize (cdr (assq w newsizes))))
+ (enlarge-window
+ (/ (- newsize (window-pixel-height))
+ (face-height 'default))))))
+ 'nomini)))
+\f
+;;; I think this should be the default; I think people will prefer it--rms.
+(defcustom split-window-keep-point t
+ "*If non-nil, split windows keeps the original point in both children.
+This is often more convenient for editing.
+If nil, adjust point in each of the two windows to minimize redisplay.
+This is convenient on slow terminals, but point can move strangely."
+ :type 'boolean
+ :group 'windows)
+
+(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.
+Negative arg means select the size of the lowermost window instead.
+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.
+
+Programs should probably use split-window instead of this."
+ (interactive "P")
+ (let ((old-w (selected-window))
+ (old-point (point))
+ (size (and arg (prefix-numeric-value arg)))
+ (window-full-p nil)
+ new-w bottom moved)
+ (and size (< size 0) (setq size (+ (window-height) size)))
+ (setq new-w (split-window nil size))
+ (or split-window-keep-point
+ (progn
+ (save-excursion
+ (set-buffer (window-buffer))
+ (goto-char (window-start))
+ (setq moved (vertical-motion (window-height)))
+ (set-window-start new-w (point))
+ (if (> (point) (window-point new-w))
+ (set-window-point new-w (point)))
+ (and (= moved (window-height))
+ (progn
+ (setq window-full-p t)
+ (vertical-motion -1)))
+ (setq bottom (point)))
+ (and window-full-p
+ (<= bottom (point))
+ (set-window-point old-w (1- bottom)))
+ (and window-full-p
+ (<= (window-start new-w) old-point)
+ (progn
+ (set-window-point new-w old-point)
+ (select-window new-w)))))
+ 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.
+Negative arg means select the size of the rightmost window instead.
+No arg means split equally."
+ (interactive "P")
+ (let ((size (and arg (prefix-numeric-value arg))))
+ (and size (< size 0)
+ (setq size (+ (window-width) size)))
+ (split-window nil size t)))
+\f
+(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 shrink-window-if-larger-than-buffer (&optional window)
+ "Shrink the WINDOW to be as small as possible to display its contents.
+Do not shrink to less than `window-min-height' lines.
+Do nothing if the buffer contains more lines than the present window height,
+or if some of the window's contents are scrolled out of view,
+or if the window is not the full width of the frame,
+or if the window is the only window of its frame."
+ (interactive)
+ (or window (setq window (selected-window)))
+ (save-excursion
+ (set-buffer (window-buffer window))
+ (let ((n 0)
+ (test-pos
+ (- (point-max)
+ ;; If buffer ends with a newline, ignore it when counting
+ ;; height unless point is after it.
+ (if (and (not (eobp))
+ (eq ?\n (char-after (1- (point-max)))))
+ 1 0)))
+ (mini (frame-property (window-frame window) 'minibuffer))
+ (edges (window-pixel-edges (selected-window))))
+ (if (and (< 1 (let ((frame (selected-frame)))
+ (select-frame (window-frame window))
+ (unwind-protect
+ (count-windows)
+ (select-frame frame))))
+ ;; check to make sure that we don't have horizontally
+ ;; split windows
+ (eq (frame-highest-window (window-frame window) 0)
+ (frame-highest-window (window-frame window) -1))
+ (pos-visible-in-window-p (point-min) window)
+ (not (eq mini 'only))
+ (or (not mini) (eq mini t)
+ (< (nth 3 edges)
+ (nth 1 (window-pixel-edges mini)))
+ (> (nth 1 edges)
+ 0)))
+ (progn
+ (save-window-excursion
+ (goto-char (point-min))
+ (while (and (window-live-p window)
+ (pos-visible-in-window-p test-pos window))
+ (shrink-window 1 nil window)
+ (setq n (1+ n))))
+ (if (> n 0)
+ (shrink-window (min (1- n)
+ (- (window-height window)
+ (1+ window-min-height)))
+ nil
+ window)))))))
+
+(defun kill-buffer-and-window ()
+ "Kill the current buffer and delete the selected window."
+ (interactive)
+ (if (yes-or-no-p (format "Kill buffer `%s'? " (buffer-name)))
+ (let ((buffer (current-buffer)))
+ (delete-window (selected-window))
+ (kill-buffer buffer))
+ (error "Aborted")))
+
+;;; New with XEmacs 20.3
+;;; Suggested by Noah Friedman, and tuned by Hrvoje Niksic.
+(defun window-list (&optional minibuf all-frames device)
+ "Return a list of existing windows.
+If the optional argument MINIBUF is non-nil, then include minibuffer
+windows in the result.
+
+By default, only the windows in the selected frame are returned.
+The optional argument ALL-FRAMES changes this behavior:
+ALL-FRAMES = `visible' means include windows on all visible frames.
+ALL-FRAMES = 0 means include windows on all visible and iconified frames.
+ALL-FRAMES = t means include windows on all frames including invisible frames.
+Anything else means restrict to the selected frame.
+The optional fourth argument DEVICE further clarifies which frames to
+search as specified by ALL-FRAMES. This value is only meaningful if
+ALL-FRAMES is non-nil.
+If nil or omitted, search only the selected device.
+If a device, search frames only on that device.
+If a device type, search frames only on devices of that type.
+Any other non-nil value means search frames on all devices."
+ (let ((wins nil))
+ (walk-windows (lambda (win)
+ (push win wins))
+ minibuf all-frames device)
+ wins))
+
+
+;;; window.el ends here
projects / chise / xemacs-chise.git / blobdiff