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Re: Any infrastructure to select one of a few options in Emacs core?
From: |
John Mastro |
Subject: |
Re: Any infrastructure to select one of a few options in Emacs core? |
Date: |
Thu, 19 May 2016 18:16:22 -0700 |
Marcin Borkowski <mbork@mbork.pl> wrote:
> I went with this code:
>
> --8<---------------cut here---------------start------------->8---
> (defun select-choice (message choices)
> "Display a buffer with MESSAGE and then CHOICES.
> Each element of CHOICES should be a cons cell, whose car is the
> result and the cdr is the description. The user may select one
> by pressing a digit."
> ;; TODO: This function is way too simple and not fool-proof!
> (if (> (length choices) 9)
> (error "Too many choices!")
> (save-window-excursion
> (pop-to-buffer " *amsrefs doi selection*" t t)
> (delete-other-windows) ; TODO: this should be fixed
> (erase-buffer)
> (insert message "\n\n")
> (let ((i 0))
> (dolist (choice choices)
> (setq i (1+ i))
> (insert (format "%d. %s\n\n" i (cdr choice)))))
> (let ((key (read-key)))
> (if (<= 49 key 57)
> (car (nth (- key 49) choices))
> (error "Wrong key pressed!"))))))
> --8<---------------cut here---------------end--------------->8---
>
> As it is said in the comment, it is far from ideal, but the whole
> program I've been writing for my friend is one big quick hack, so
> I didn't bother too much.
I've sometimes wanted something like this too.
I played around with a few cosmetic changes to your function and ended
up with this:
(defun read-choice (prompt choices)
(if (> (length choices) 9)
(error "Too many choices (max 9)")
(let ((cursor-in-echo-area t)
(prompt (if (get-text-property 0 'face prompt)
prompt
(propertize prompt
'face
'minibuffer-prompt))))
(save-window-excursion
(pop-to-buffer " *Read choice*" t t)
(setq-local cursor-type nil)
(erase-buffer)
(let ((i 0))
(dolist (choice choices)
(setq i (1+ i))
(insert (propertize (number-to-string i)
'face
'font-lock-variable-name-face)
(format " %s\n" (cdr choice))))
(goto-char (point-min))
(fit-window-to-buffer)
(let ((key (- (read-key prompt) 48)))
(if (<= 1 key i)
(car (nth (1- key) choices))
(user-error "Invalid key"))))))))
Same functionality but posted anyway in the spirit of sharing :)
Why did you find `delete-other-windows' necessary? (Your TODO mentions
that it should be "fixed", so I assume you would have preferred not to
use it.)
John
- Any infrastructure to select one of a few options in Emacs core?, Marcin Borkowski, 2016/05/09
- RE: Any infrastructure to select one of a few options in Emacs core?, Drew Adams, 2016/05/09
- Re: Any infrastructure to select one of a few options in Emacs core?, Marcin Borkowski, 2016/05/09
- Re: Any infrastructure to select one of a few options in Emacs core?, Kaushal Modi, 2016/05/09
- Re: Any infrastructure to select one of a few options in Emacs core?, Marcin Borkowski, 2016/05/09
- RE: Any infrastructure to select one of a few options in Emacs core?, Drew Adams, 2016/05/09
- Re: Any infrastructure to select one of a few options in Emacs core?, Marcin Borkowski, 2016/05/09
- RE: Any infrastructure to select one of a few options in Emacs core?, Drew Adams, 2016/05/09
- Re: Any infrastructure to select one of a few options in Emacs core?, Marcin Borkowski, 2016/05/19
- Re: Any infrastructure to select one of a few options in Emacs core?,
John Mastro <=
- Re: Any infrastructure to select one of a few options in Emacs core?, John Mastro, 2016/05/20
- Re: Any infrastructure to select one of a few options in Emacs core?, Marcin Borkowski, 2016/05/21
- Re: Any infrastructure to select one of a few options in Emacs core?, Pascal J. Bourguignon, 2016/05/09
- Re: Any infrastructure to select one of a few options in Emacs core?, Emanuel Berg, 2016/05/16
- Re: Any infrastructure to select one of a few options in Emacs core?, Marcin Borkowski, 2016/05/21
Re: Any infrastructure to select one of a few options in Emacs core?, Emanuel Berg, 2016/05/16