Bug#1004711: gimp uses ebook-viewer (from calibre package) for print preview

[Eric Cooper]

Thanks for this explanation. Unfortunately, I still can't find any place
that's specifying ebook-viewer (or any PDF viewer, for that matter) among
the various files you listed (none of which I've modified myself).

I purged calibre and tried the print preview again. Oddly, gimp still did
not use mupdf, it used itself: it popped up the "import pdf" dialog for the
pdf it was going to print, and opened a new (gimp) window for it.

On Tue, Feb 1, 2022 at 5:22 AM Simon McVittie <smcv at debian.org> wrote:

> On Mon, 31 Jan 2022 at 18:36:11 -0500, Eric Cooper wrote:
> > I have both mupdf and calibre installed. When I choose File > Print,
> > and then Print Preview, gimp launches the ebook-viewer program from
> > calibre rather than mupdf, which appears before ebook-viewer in
> > /etc/mailcap (if that matters).
>
> The command used for print previews in GTK 2 comes from your GTK theme
> (for historical reasons) or from gtkrc (several locations are searched,
> ~/.gtkrc-2.0 is the highest-priority).
>
> Neither ebook-viewer nor mupdf is hard-coded anywhere in GTK or GIMP.
> The only hard-coded command related to print previews is GNOME's evince,
> which is used as a default if nothing else is configured.
>
> Rather than /etc/mailcap, it is more likely that the print preview is
> using your configured default PDF viewer according to this freedesktop.org
> specification:
> https://specifications.freedesktop.org/mime-apps-spec/latest/
>
> You can configure the preferred PDF viewer for each user via
> ~/.config/mimeapps.list, or system-wide via /etc/xdg/mimeapps.list.
>
> In a well-integrated desktop environment, defaults for several
> commonly-used
> applications are in /usr/share/applications/DESKTOP-mimeapps.list, where
> DESKTOP is the value of $XDG_CURRENT_DESKTOP transformed to lower-case.
> For example, the GNOME desktop environment uses XDG_CURRENT_DESKTOP=GNOME,
> and installs /usr/share/applications/gnome-mimeapps.list via the
> gnome-session-common package.
>
> /etc/mailcap is no longer used by most libraries and applications. It's
> generated from freedesktop.org .desktop files by the update-mime command
> for compatibility with libraries and applications that still use it,
> but for historical reasons it has its own preference order.
>
>     smcv
>
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