`goto-char' in callback to `url-retrieve'

`goto-char' in callback to `url-retrieve'

[Deniz Dogan]

I'm using the following code to play around with `url-retrieve':

(defun rss-get-feed-callback (status url)
   (switch-to-buffer (current-buffer))
   (goto-char 0))

(defun rss-get-feed (url)
   (url-retrieve url 'rss-get-feed-callback (list url) t t))

(defun rss-test ()
   (interactive)
   (rss-get-feed "http://blogg.aftonbladet.se/feeds/entries/bankoniva/rss"))

When I hit M-x rss-test RET, I expect point to be at the first character 
of the result buffer, but it is nevertheless at the end.

Is this a bug?  I'm using: GNU Emacs 24.0.93.1 (i386-mingw-nt6.1.7601) 
of 2012-02-16 on MARVIN

Cheers,
Deniz

Re: `goto-char' in callback to `url-retrieve'

[Johan Bockgård]

Deniz Dogan <deniz@dogan.se> writes:

> When I hit M-x rss-test RET, I expect point to be at the first
> character of the result buffer, but it is nevertheless at the end.

The callback is called inside `save-excursion'.

Re: `goto-char' in callback to `url-retrieve'

[Lynbech Christian]

Even if not truly relevant here (due to the save-excursion mentioned in
the followup), you may want to consider using

        (goto-char (point-min))

as a better idiom than 

        (goto-char 0)

since the former will also correctly handle narrowed buffers.


------------------------+-----------------------------------------------------
Christian Lynbech       | christian #\@ defun #\. dk
------------------------+-----------------------------------------------------
Hit the philistines three times over the head with the Elisp reference manual.
                                        - petonic@hal.com (Michael A. Petonic)