Supporting mime types in desktop actions

[Jerome Leclanche]

Writing the intents spec, I found out that according to the desktop entry
spec:
http://standards.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html
Desktop Actions do not support a MimeType key. Is there a solid reason why?

My use case:
I have an image viewer and editor which supports viewing jpg and png,
however it can only *edit* png files. The "Edit" action would then only
support image/png while the main entry would support image/jpeg and
image/png.

One of the issues raised by supporting it is associating a mime type to an
action (rather than a desktop file altogether).
I propose the following syntax for mimeapps.list

image/jpeg=myapp.desktop;
image/png=myapp.desktop;myapp.desktop[Edit];

In brackets would be the name of the desktop action as specified by the
[Desktop Action Edit]. Possibly going even further, in the name could be
the entire section, eg [Desktop Action Edit], that way it may support
possible extensions to the spec though I find that a little verbose.

Thoughts?

J. Leclanche
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