Re: [Geiser-users] Showing images in windows

[Jose A. Ortega Ruiz]

Hi,

On Mon, Dec 10 2012, Gustav Wikström wrote:

> Hi!
>
> I've been trying to get the image-functionality to work with geiser
> and Racket. On windows. The dll's are downloaded and images work in
> general. Just not in geiser.
>
> Trying to debug a bit I realize the problem is with the image pattern
> that is scanned in geiser-image--replace-images. Not necessarily in
> that function, but in the function that creates the string to be
> parsed..

If you can see image files being created in C:\, please try replacing
line 93 in geiser-image.el (you can open it quickly with M-x
find-library RET geiser-image RET) by:

        (while (re-search-forward "\"?#<Image: \\([-+.\\\\/_0-9a-zA-Z]+\\)>\"?" 
nil t)

(there's just a change in the regular expression recognizing where
images need to be inserted): i think it's actually a bug in that
very function.

> On my system the string is generated with "\" instead of "/" between
> folders.
>
> Eg. 
> c:\image.png
>
> instead of 
> c:/image.png
>
> Emacs cannot handle that (at least not my emacs!).

Unless i'm mistaken, it's not Emacs, but Geiser's
geiser-imag--replace-images who cannot cope :) Let's see if the above
fix is really a fix, if you can try.

>
> I haven't found the function generating the image-string, but maybe
> that is Racket-specific? Anyhow, is there anyone in here who knows how
> to "fix" this - if it needs to be fixed - or can give me some advice
> on how to configure this if it is a user-based error by me?

Even if the above fixes the problem, you might want to change the
customizable variable geiser-image-cache-dir to a path of your liking.
If you then restart the REPL with this variable set, Geiser will tell
Racket to use that directory to store cached image files, instead of
polluting your root directory.

Hope this helps,
jao
-- 
One reason that life is complex is that it has a real part and an
imaginary part.
 -Andrew Koenig