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Re: Selecting default prompt text


From: Richard Riley
Subject: Re: Selecting default prompt text
Date: Thu, 12 Feb 2009 14:35:40 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.90 (gnu/linux)

Andreas Politz <address@hidden> writes:

> Richard Riley wrote:
>> Kevin Rodgers <address@hidden> writes:
>>
>>> Richard Riley wrote:
>>>> I like my interactive functions to generally use the word or region at
>>>> point as a default. Is there a way to make the read-string mini buffer
>>>> input to pre-select the default value?
>>>>
>>>> e.g
>>>>
>>>> consider
>>>>
>>>> (setq url (read-string (format "Url (%s) :" url) url nil url))
>>>>
>>>> Here I would like to see at the input prompt
>>>>
>>>> Url (xyz): xyz
>>>>
>>>> with the default value of "xyz" already selected. In other words
>>>> the same behaviour as when you tab into a populated  entry field in most
>>>> of applications.
>>> (let ((url-at-point (thing-at-point 'url)))
>>>   (read-string (if url-at-point
>>>                (format "URL (%s): " url-at-point)
>>>              "URL: ")
>>>            nil nil url-at-point))
>>
>> Hi Kevin,
>>
>> Sorry if I was not clear. I don't mean a default value - I mean
>> pre-selected as in "in region". e.g when you tab to a field in a web
>> form for example - The data in the field is highlighted/selected. I
>> already had a default value set as "url" in the code above.
>>
>> e.g
>>
>> goto www.Google.com 
>>
>> enter some text and tab to a button then tab back. The text in the
>> search field is selected.
>>
>>
>>
>
> Something like this ?
>
> (defun minibuffer-select-inital-input ()
>   (let ((start (next-single-char-property-change 1 'read-only)))
>     (when (< start (point-max))
>       (set-mark start)
>       (setq mark-active t))))
>
> (add-hook 'minibuffer-setup-hook 'minibuffer-select-inital-input)
> (read-string "> " "Hallo")
>
> -ap

Yes, thanks. But I released I was hoping for too much here since
region/mark etc works so many different ways depending on settings. As
"dim" in the #emacs said, probably best to rely on C-a C-k. e.g With my
setting hitting right arrow there results in "end of buffer" error.

Thanks for your time though!


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