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gtk: fix GTK 4 theme being ignored

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Haven't dug into any code, but my best guess is GTK 4 ignores it on
purpose since devs campaigned against theming: https://stopthemingmy.app

According to the following link, it's fine for users to do it as long
as they don't expect support from app devs. And the campaign was
against distributions applying custom themes by default.

  https://github.com/GradienceTeam/Gradience/tree/0.4.1#%EF%B8%8F-gradience-stopthemingmyapp-and-adwaita-developers
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ThinkChaos 2023-12-16 09:01:19 -05:00 committed by GitHub
parent b00a03b668
commit e9b9ecef42
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1 changed files with 12 additions and 2 deletions
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14
modules/misc/gtk.nix
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@ -35,6 +35,8 @@ let
Package providing the theme. This package will be installed
to your profile. If `null` then the theme
is assumed to already be available in your profile.
For the theme to apply to GTK 4, this option is mandatory.
'';
};
@ -233,6 +235,15 @@ in {
gtk-cursor-theme-size = cfg.cursorTheme.size;
};
gtk4Css =
lib.optionalString (cfg.theme != null && cfg.theme.package != null) ''
/**
* GTK 4 reads the theme configured by gtk-theme-name, but ignores it.
* It does however respect user CSS, so import the theme from here.
**/
@import url("file://${cfg.theme.package}/share/themes/${cfg.theme.name}/gtk-4.0/gtk.css");
'' + cfg4.extraCss;
dconfIni = optionalAttrs (cfg.font != null) {
font-name = let
fontSize =
@ -277,8 +288,7 @@ in {
xdg.configFile."gtk-4.0/settings.ini".text =
toGtk3Ini { Settings = gtkIni // cfg4.extraConfig; };
xdg.configFile."gtk-4.0/gtk.css" =
mkIf (cfg4.extraCss != "") { text = cfg4.extraCss; };
xdg.configFile."gtk-4.0/gtk.css" = mkIf (gtk4Css != "") { text = gtk4Css; };
dconf.settings."org/gnome/desktop/interface" = dconfIni;
});