1

Is that possible to use kind of constants in gnome-shell.css theme file?

Something linke

@import url("/usr/share/gnome-shell/theme/gnome-shell.css");

@PANEL_ALPHA:0.5;

#panel {
    background-color: rgba(0,0,0,@PANEL_ALPHA);
}

.panel-corner {
    -panel-corner-background-color: rgba(0,0,0,@PANEL_ALPHA);
}

I also tried with @const PANEL_ALPHA:0.5; but it doesn't work.

1

If I understand the documentation correctly (big if), no. The CSS version implemented by GTK3 only accepts a subset of the full CSS3 functionality. Specifically:

GTK+ also supports an additional @define-color rule, in order to define a color name which may be used instead of color numeric representations. Also see the "gtk-color-scheme" setting for a way to override the values of these named colors.

@define-color bg_color #f9a039;

* {
    background-color: @bg_color;
}

So, you can define colors using the @define-color keyword but I don't think you can define arbitrary identifiers.

| improve this answer | |
  • Have you tried that? I've tried in my theme but it doesn't work... – lviggiani Mar 21 '14 at 9:52
  • @lviggiani no I haven't, that was a direct quote from the official documentation (see the link in my answer). However, I checked in some of the themes I have installed and many do use it. For example: Adwaita, Menta, Albatross, Xfce-cadmium, Bluebird, Clearlooks-Phenix, GreenLaguna, you should be able to find all of these on gnome-look.org, download one and see how they do it. – terdon Mar 21 '14 at 17:04

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