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Re: How to handle default value in read-string?
From: |
Marcin Borkowski |
Subject: |
Re: How to handle default value in read-string? |
Date: |
Wed, 19 Aug 2015 23:15:46 +0200 |
On 2015-08-04, at 01:51, Drew Adams <drew.adams@oracle.com> wrote:
>> I'd like read-string to somehow indicate the default value. A natural
>> idea is to include it in the prompt, for example having a prompt like
>>
>> (format "Foo (%s): " default)
>>
>> However, Icicles' version of read-string already does exactly that, so
>> for Icicles users this would be superfluous.
>>
>> So here's the question: is there a better way than just have a prompt of
>>
>> (if icicle-mode (don't-include-default) (do-include-default))?
>
> That's OK. Or wrap the `read-string' call in:
>
> (let ((icicle-default-value nil)) ...)
>
> A nil value of `icicle-default-value' tells Icicles not to put the
> default value in the prompt. Then you can add it to the prompt
> explicitly, so it will be there with and without Icicle mode:
>
> (defun foo (strg)
> (interactive
> (let ((icicle-default-value nil))
> (list (read-string "String (default my-default): "
> nil nil "my-default")))))
OK, so I sat to this today, and didn't manage to get it to work. Here's
my function:
--8<---------------cut here---------------start------------->8---
(defun my-read-string (prompt &optional initial-input history default-value
inherit-input-method)
"A replacement for `read-string', displaying the default.
Also, not displaying it twice should the user use Icicles."
(let ((icicle-default-value nil)
(prompt-with-default
(progn
(string-match "\\(: \\)?$" prompt)
(replace-match (format " (%s)\\1" default-value) t nil prompt))))
(read-string prompt-with-default initial-input history default-value
inherit-input-method)))
--8<---------------cut here---------------end--------------->8---
If I do M-: (my-read-string "foo: " nil nil "bar") with Icicles off,
everything is fine. If Icicles are on, however, this is what I get:
foo (bar) (bar): -!-
Setting icicle-default-value to nil globally doesn't help, either.
My Icicles version is
--8<---------------cut here---------------start------------->8---
;; Version: 2015.04.03
;; Package-Requires: ()
;; Last-Updated: Fri Apr 3 09:12:40 2015 (-0700)
;; By: dradams
;; Update #: 23650
--8<---------------cut here---------------end--------------->8---
What am I doing wrong?
--
Marcin Borkowski
http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
Faculty of Mathematics and Computer Science
Adam Mickiewicz University