Allow GTK theming for Ubuntu Budgie

[fossfreedom]

Ubuntu Budgie uses gnome-screensaver for its lock-screen.

By default, gnome-screensaver does not provide a GTK+3 based style class - thus the lock screen is not themed by modern GTK+3 themes.

UB already has a patch (33_budgie_support.patch) that fixes a couple of issues.

I have updated this patch to allow GTK+3 theming via the style class "lock-dialog". This allows gnome-screensaver to the themed in the same way as the gnome-screensaver fork mate-screensaver which uses the same named style-class.

This has been tested using the GTK+3 theme adapta which has the MATE lock-screen style class "lock-dialog" .

I will be separately updating arc-theme (the theme used by Ubuntu Budgie) to provide theming for both mate-screensaver and gnome-screensaver (for Ubuntu Budgie).

Note - if its considered useful, I'm happy to rework this to move the style-class application to a separate patch to allow all desktops that use gnome-screensaver to be equally themed. However I've only tested this patch on Ubuntu Budgie and hence have restricted the style-class application to UB.

[Simon Quigley (tsimonq2)]

I'm subscribing Jeremy Bicha for a review because he is the last uploader of this package.

Thanks, and sorry for the delay!

[Tim Lunn (darkxst)]

fossfreedom, your patch looks fine to me. It does seem more generally useful however not sure who is using gnome-screensaver anymore? probably just Unity as a fallback?

I was going to upload it to unblock you, but it has been dropped from the ubuntu-desktop package set with the move to gnome-shell, so alas I can't.

[Simon Quigley (tsimonq2)]

Since Tim said the patch looks good, sponsoring.

Thanks!

[Launchpad Janitor (janitor)]

This bug was fixed in the package gnome-screensaver - 3.6.1-8ubuntu3

---------------
gnome-screensaver (3.6.1-8ubuntu3) bionic; urgency=medium

  * Update 33_budgie_support.patch
    - Add lock-dialog stylecontext to allow theming (LP: #1740150)

 -- David Mohammed <email address hidden> Tue, 06 Mar 2018 23:55:34 -0600