Modifying an existing desktop file's MimeTypes

[Bastien Nocera]

On Sat, 2014-01-11 at 13:36 +0100, Albert Astals Cid wrote:
> El Dissabte, 11 de gener de 2014, a les 02:28:18, Jerome Leclanche va 
> escriure:
> > Consider the following use case:
> > 
> > "gimp" supports image/png. "gimp-webp-plugin" makes gimp support image/webp.
> > 
> > How would gimp-webp-plugin declare that it makes another app support
> > additional mime types? I don't think it's possible currently.
> > Suggestions?
> 
> In Okular we just install another .desktop with the same main keys (Name, 
> exec, type, etc) except it has a different mimetype and NoDisplay=true
> 
> That works fine under KDE but I've been told not so good under 
> gnome/glib/gtk/whatever does the .desktop parsing.
> 
> IMHO it's quite a clean an easy way to do it, but I do not have much in depth 
> knowledge of how this works/is supposed to work.

It works fine under GNOME, but it will break some other functionality
like "Default applications" because there's no way to back link to the
original desktop file (the one without NoDisplay=true).