Re: Simple "view this image externally" question

[Katsumi Yamaoka <yamaoka@jpl.org>]

>>>>> Paul R wrote:
> I can't display externally any image when the name contains space.
> I haven't investigated much but I suspect the default viewer ("display",
> from image-magick) to be run without quoting the temp file name nor
> escaping spaces. I had a quick look at gnus and multimedia customization
> but I did not find any variable that could fix that.

> As an interesting data point, dired does not suffer from this problem
> when using dired-display-image-externaly (or so...).

> Could some kind and knowlegable soul do something about that please ?

I don't know what `dired-display-image-externaly' is, but one
possibility is that the program Gnus uses to display images is
a shell script.  Is it the real "display" executable?  To verify
it, try evaluating the following forms (for example):

(mailcap-mime-info "image/png")
 => "display %s"

(executable-find "display")
 => "/usr/local/bin/display"

And examine the type of the program:

% file /usr/local/bin/display
 => /usr/local/bin/display: ELF 32-bit LSB executable,...

Gnus should quote space as follows:

(mm-mailcap-command "display %s" "file name.png"
		    '("image/png" (name . "file name.png")))
 => "display file\\ name.png"

However, if "display" is a shell script, the quotes in the file
name likely get disappeared when the shell script passes it to
the real command.

Maybe one solution is to make the ~/.mailcap file have the entry
like:

image/*; /usr/local/bin/display %s

To reflect it immediately, use `M-x mailcap-parse-mailcaps RET'.