jbw%bucsf.BU.EDU@BU-CS.BU.EDU (Joe Wells) (03/21/89)
Are you annoyed when help windows take up half of the screen, but only
have one line of text? Do you hate resizing them? Here's a small
package that will fix the problem of badly sized help windows.
This package will adjust the size of help windows to fit the text,
subject to a maximum size. It will never accidentally enlarge the
minibuffer, which some people were recently discussing. If the window
for the temp buffer is already on the screen, it will be resized.
Have fun, send bugs to me.
--
Joe Wells
INTERNET: jbw%bucsf.bu.edu@bu-it.bu.edu IP: [128.197.10.201]
UUCP: ...!harvard!bu-cs!bucsf!jbw
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;; Improved help-window display.
;; Copyright (C) 1989 Free Software Foundation, Inc.
;; This file is not officially part of GNU Emacs, but is being donated
;; to the Free Software Foundation.
;; 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.
;; Author: Joe Wells
;; jbw%bucsf.bu.edu@bu-it.bu.edu (school year)
;; joew%uswest@boulder.colorado.edu (summer)
;; The ideas for this package were derived from the C code in
;; src/window.c.
(defvar temp-buffer-max-height (/ (- (screen-height) 2) 2)
"*This is the maximum window height (in text lines + mode line) which
show-temp-buffer will give to a temp buffer.")
(or temp-buffer-show-hook
(setq temp-buffer-show-hook 'show-temp-buffer))
(defun show-temp-buffer (buffer)
"Display BUFFER on the screen in a window of appropriate size. Will
not give a window of size greater than temp-buffer-max-height."
(let* ((current-window (selected-window))
(window (display-buffer buffer))
(window-lines (window-height window))
;; Check if we can safely resize this window
(minibuffer-line (nth 1 (window-edges (minibuffer-window))))
(window-edges (window-edges window))
(minibuffer-safe (not (and (= (nth 1 window-edges) 0)
(= (nth 3 window-edges)
minibuffer-line))))
window-lines-needed)
;; Ensure sane initial window configuration
(setq minibuffer-scroll-window window)
(set-window-start window 1)
(set-window-point window 1)
(set-window-hscroll window 0)
(save-excursion
(set-buffer buffer)
(goto-char (point-min))
;; Delete leading blank lines
(if (looking-at "\n+")
(let ((buffer-read-only nil)
(buffer-modified-p (buffer-modified-p)))
(replace-match "")
(set-buffer-modified-p buffer-modified-p)))
;; Calculate vertical lines needed by text
(setq window-lines-needed
(+ 1 (vertical-motion (- temp-buffer-max-height 2))
(if (bolp) 0 1))))
(cond (minibuffer-safe
;; Make sure the window isn't too small
(setq window-lines-needed
(if (< window-lines-needed window-min-height)
window-min-height
window-lines-needed))
;; Do the resize operation
(select-window window)
(enlarge-window (- window-lines-needed window-lines))
(select-window current-window)))))
(provide 'show-temp-buffer)