I can not change the behavior of open the link which is a CHM file [[file+sys://kk.chm]]

I can not change the behavior of open the link which is a CHM file [[file+sys://kk.chm]]

[chris]

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I set variable "org-file-apps" like this:


(setq org-file-apps
      '(;; default
        (auto-mode . emacs)
        ("\\.mm\\'" . default)
        ;; ("\\.x?html?\\'" . default)
        ("\.x?html\'" . "firefox %s")
        ("\\.pdf\\'" . default)
        ("\\.pdf::\\([[:digit:]]+\\)\\'" . "okular -p %1 %s")
        ;; extras
        ("\\.chm\\'" . "kchmviewer %s") ;; TODO open CHM file with external program.
        ))

But when I open a CHM file, Emacs does not open it with "kchmviewer", just open
CHM in Emacs.

What's wrong ?

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Re: I can not change the behavior of open the link which is a CHM file [[file+sys://kk.chm]]

[Nick Dokos]

chris <numbchild@gmail.com> writes:

> I set variable "org-file-apps" like this:
>
>
> (setq org-file-apps
>       '(;; default
>         (auto-mode . emacs)
>         ("\\.mm\\'" . default)
>         ;; ("\\.x?html?\\'" . default)
>         ("\.x?html\'" . "firefox %s")
>         ("\\.pdf\\'" . default)
>         ("\\.pdf::\\([[:digit:]]+\\)\\'" . "okular -p %1 %s")
>         ;; extras
>         ("\\.chm\\'" . "kchmviewer %s") ;; TODO open CHM file with external program.
>         ))
>
> But when I open a CHM file, Emacs does not open it with "kchmviewer", just open
> CHM in Emacs.
>
> What's wrong ?

Nothing is wrong. org-file-apps applies only to links that org-mode
knows about (e.g. when you follow a link to a CHM file from an org file
- that should work). In order to affect emacs as a whole, you need to
modify one of your mailcap files - read the manual page mailca[(5) for
the details. It's probably best to put it in your personal mailcap file,
~/.mailcap, but if your machine is used by other people who might also
want the association, you might want to put it into /etc/mailcap. I have
no idea how Windows does these things, so if you are running on Windows
you might need additional help.

mailcap maps content type (e.g. chemical/x-chemdraw) to processor:

chemical/x-chemdraw; kchmviewer %s

You might also need to provide an association between a filename suffix
and a content type. That is done in /etc/mime.types or ~/.mime.types:

chemical/x-chemdraw                     chm

My /etc/mime.types already contained this association.

This is the general mechanism and *all* programs that claim to deal
with MIME content use it, including emacs. org-file-apps should be
used only to impose *exceptions* to this rule (e.g. you might want to
treat some content types differently if they are found as targets of
links from org files).

-- 
Nick

Re: I can not change the behavior of open the link which is a CHM file [[file+sys://kk.chm]]

[Jambunathan K]

Nick Dokos <ndokos@gmail.com> writes:

> In order to affect emacs as a whole, you need to modify one of your
> mailcap files

This will work as well.

        (setcdr (assq 'system org-file-apps-defaults-gnu ) "xdg-open %s")

If xdg-open is not available, one can replace it with gnome-open or
kde-open.

Re: I can not change the behavior of open the link which is a CHM file [[file+sys://kk.chm]]

[Nick Dokos]

On 07/09/2013 10:08 AM, Jambunathan K wrote:
> Nick Dokos <ndokos@gmail.com> writes:
>
>> In order to affect emacs as a whole, you need to modify one of your
>> mailcap files
> This will work as well.
>
>          (setcdr (assq 'system org-file-apps-defaults-gnu ) "xdg-open %s")
>
> If xdg-open is not available, one can replace it with gnome-open or
> kde-open.
  I don't understand: how will changing org-file-apps-defaults-gnu 
affect the rest of emacs?
E.g. if I receive a chem attachment and I use e.g. mh-e to read my mail, 
how will that help me?

Re: I can not change the behavior of open the link which is a CHM file [[file+sys://kk.chm]]

[Jambunathan K]

Nick Dokos <nick@dokosmarshall.org> writes:

> On 07/09/2013 10:08 AM, Jambunathan K wrote:
>> Nick Dokos <ndokos@gmail.com> writes:
>>
>>> In order to affect emacs as a whole, you need to modify one of your
>>> mailcap files
>> This will work as well.
>>
>>          (setcdr (assq 'system org-file-apps-defaults-gnu ) "xdg-open %s")
>>
>> If xdg-open is not available, one can replace it with gnome-open or
>> kde-open.
>  I don't understand: how will changing org-file-apps-defaults-gnu
> affect the rest of emacs?
> E.g. if I receive a chem attachment and I use e.g. mh-e to read my
> mail, how will that help me?

Did I forget `Conditions apply'?

Re: I can not change the behavior of open the link which is a CHM file [[file+sys://kk.chm]]

[chris]

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Excerpts from [ Jambunathan K ] //// On [2013-07-09 19:38:35 +0530]:

> Nick Dokos <ndokos@gmail.com> writes:
> 
> > In order to affect emacs as a whole, you need to modify one of your
> > mailcap files
> 
> This will work as well.
> 
>         (setcdr (assq 'system org-file-apps-defaults-gnu ) "xdg-open %s")
This is great, thanks. A good and simple method.
> 
> If xdg-open is not available, one can replace it with gnome-open or
> kde-open.

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