Can we install a gtk program without root privileges?

[Stefan Salewski <mail ssalewski de>]

My Nim editor https://github.com/ngtk3/NEd can be launced from the
directory with the binary by typing

./ned file.nim

For testing that is fine. But to make it work from an arbitrary
directory something like

# And for making gsettings available system wide one method is, as root
# https://developer.gnome.org/gio/stable/glib-compile-schemas.html
# echo $XDG_DATA_DIRS
# /usr/share/gnome:/usr/local/share:/usr/share:/usr/share/gdm
# cd /usr/local/share/glib-2.0/schemas
# cp org.gtk.ned.gschema.xml .
# glib-compile-schemas .
#

# as root
cp nimdark1.xml /usr/share/gtksourceview-3.0/styles/
cp nim.lang /usr/share/gtksourceview-3.0/language-specs/

is necessary as described in the doc. That is fine for myself, but I
can understand that other people fear to damage their system when doing
root actions.

Problem seems to be the gsettings path and additional the gtksourceview
directories. May there exist a way to make it work at least on Linux
without root privileges?