How to fix GTK theme for Nemo's pathbar breadcrumbs and disk free space barchart

Question

I like a few features of Nemo, but there seems to be a theme problem - at least when running under Ubuntu Gnome 14.04:

As you can see from this screenshot:

it's not possible to see which of the breadcrumbs is selected, and the barchart for available space seems to be colouring both full and free the same colour!

In the screenshot I have the "global dark theme" on, but it's the same problem without this.

Answer 1

I installed Nemo from the Mint packaged for Ubuntu archives. This updated it, made some more nemo-* packages available and fixed the breadcrumbs, but I was left with the useless disk space indicators. Here's how I fixed those:

Create your own GTK+3 theme as follows

First, duplicate the Adwaita theme with the name Adwaita-custom

$ cd /usr/share/themes
$ sudo bash  # easier than prepending every line with sudo...
# cp -ar Adwaita Adwaita-custom
# cd Adwaita-custom
# sed -i 's/Adwaita/Adwaita-custom/' index.theme

Now we add special CSS for Nemo

# cd gtk-3.0
# echo '@import url("apps/nemo-custom.css");' >>gtk.css
# mkdir apps
# $EDITOR apps/nemo-custom.css*

Now in that file, here's what I put:

/* For Places Sidebar diskfull indicators */
NemoPlacesTreeView {
    -NemoPlacesTreeView-disk-full-bg-color: #d9d9d9;
    -NemoPlacesTreeView-disk-full-fg-color: #4a90d9 ;
    -NemoPlacesTreeView-disk-full-bar-width: 2px;
    -NemoPlacesTreeView-disk-full-bar-radius: 1px;
    -NemoPlacesTreeView-disk-full-bottom-padding: 1px;
    -NemoPlacesTreeView-disk-full-max-length: 70px;
}
NemoPlacesTreeView:selected {
    -NemoPlacesTreeView-disk-full-bg-color: #d9d9d9;
    -NemoPlacesTreeView-disk-full-fg-color: shade(#4a90d9,0.5) ;
}

Save and exit your editor. You can now drop root privileges, too, and/or exit your terminal shell.

Now select Adwaita-custom as the GTK+ theme in the tweak tool ("Advanced Settings") app.

Here's mine now:

PS. Big thanks to Roman Raguet for the comment which linked to the original nemo css.

PPS. Oh, in my screenshot, you like my small titlebar eh? Yeah, nice. Here's how.