Package: emacs;
Reported by: Thierry Volpiatto <thierry.volpiatto <at> gmail.com>
Date: Tue, 28 Jun 2011 04:44:01 UTC
Severity: normal
Merged with 8418
Found in version 24.0.50
Done: Chong Yidong <cyd <at> gnu.org>
Bug is archived. No further changes may be made.
Forwarded to http://lists.gnu.org/archive/html/emacs-devel/2012-06/msg00463.html
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From: Thierry Volpiatto <thierry.volpiatto <at> gmail.com> To: 8948 <at> debbugs.gnu.org Subject: bug#8948: 24.0.50; y-or-n-p doesn't support scroll-o-w like yes-or-no-p Date: Thu, 30 Jun 2011 16:57:40 +0200
Thierry Volpiatto <thierry.volpiatto <at> gmail.com> writes:
> Hi,
> after discussion about bug#8927, i discover that
> from a yes-or-no-p i can scroll-other-window, but not from a
> y-or-n-p.
This allow scrolling from a y-or-n-p:
#+BEGIN_SRC lisp
(defun y-or-n-p (prompt)
"Ask user a \"y or n\" question. Return t if answer is \"y\".
PROMPT is the string to display to ask the question. It should
end in a space; `y-or-n-p' adds \"(y or n) \" to it.
No confirmation of the answer is requested; a single character is enough.
Also accepts Space to mean yes, or Delete to mean no. \(Actually, it uses
the bindings in `query-replace-map'; see the documentation of that variable
for more information. In this case, the useful bindings are `act', `skip',
`recenter', and `quit'.\)
Under a windowing system a dialog box will be used if `last-nonmenu-event'
is nil and `use-dialog-box' is non-nil."
;; ¡Beware! when I tried to edebug this code, Emacs got into a weird state
;; where all the keys were unbound (i.e. it somehow got triggered
;; within read-key, apparently). I had to kill it.
(let ((answer 'recenter))
(if (and (display-popup-menus-p)
(listp last-nonmenu-event)
use-dialog-box)
(setq answer
(x-popup-dialog t `(,prompt ("yes" . act) ("No" . skip))))
(setq prompt (concat prompt
(if (eq ?\s (aref prompt (1- (length prompt))))
"" " ")
"(y or n) "))
(while
(let* ((key
(let ((cursor-in-echo-area t))
(when minibuffer-auto-raise
(raise-frame (window-frame (minibuffer-window))))
(read-key (propertize (if (or (eq answer 'recenter)
(eq com 'scroll-other-window)
(eq com 'scroll-other-window-down))
prompt
(concat "Please answer y or n. "
prompt))
'face 'minibuffer-prompt)))))
(setq answer (lookup-key query-replace-map (vector key) t))
(setq com (lookup-key global-map (vector key) t))
(cond
((eq com 'scroll-other-window)
(with-selected-window (minibuffer-window)
(scroll-other-window 1)) t)
((eq com 'scroll-other-window-down)
(with-selected-window (minibuffer-window)
(scroll-other-window -1)) t)
((memq answer '(skip act)) nil)
((eq answer 'recenter) (recenter) t)
((memq answer '(exit-prefix quit)) (signal 'quit nil) t)
(t t)))
(ding)
(discard-input)))
(let ((ret (eq answer 'act)))
(unless noninteractive
(message "%s %s" prompt (if ret "y" "n")))
ret)))
#+END_SRC
>
>
> In GNU Emacs 24.0.50.17 (i686-pc-linux-gnu, GTK+ Version 2.24.4)
> of 2011-06-27 on thierry-MM061
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> diff-auto-refine-mode: t
> recentf-mode: t
> savehist-mode: t
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