gtk: add gtk3 theme

2 files changed, 152 insertions, 1 deletions

diff --git a/usecases/desktop/graphical/gtk-colors.scss b/usecases/desktop/graphical/gtk-colors.scss
new file mode 100644
index 0000000..b8868de
--- /dev/null
+++ b/usecases/desktop/graphical/gtk-colors.scss
@@ -0,0 +1,125 @@
+// When color definition differs for dark and light variant
+// it gets @if ed depending on $variant
+
+$blue_1: @fadedBlue@;
+$blue_2: #62a0ea;
+$blue_3: @neutralBlue@;
+$blue_4: #1c71d8;
+$blue_5: @brightBlue@;
+$green_1: @fadedGreen@;
+$green_2: #57e389;
+$green_3: @neutralGreen@;
+$green_4: #2ec27e;
+$green_5: @brightGreen@;
+$yellow_1: @fadedYellow@;
+$yellow_2: #f8e45c;
+$yellow_3: @neutralYellow@;
+$yellow_4: #f5c211;
+$yellow_5: @brightYellow@;
+$orange_1: @fadedOrange@;
+$orange_2: #ffa348;
+$orange_3: @neutralOrange@;
+$orange_4: #e66100;
+$orange_5: @brightOrange@;
+$red_1: @fadedRed@;
+$red_2: #ed333b;
+$red_3: @neutralRed@;
+$red_4: #c01c28;
+$red_5: @brightRed@;
+$purple_1: @fadedMagenta@;
+$purple_2: #c061cb;
+$purple_3: @neutralMagenta@;
+$purple_4: #813d9c;
+$purple_5: @brightMagenta@;
+$brown_1: #cdab8f;
+$brown_2: #b5835a;
+$brown_3: #986a44;
+$brown_4: #865e3c;
+$brown_5: #63452c;
+
+$light_1: @foreground0@;
+$light_2: @foreground1@;
+$light_3: @foreground2@;
+$light_4: @foreground3@;
+$light_5: @foreground4@;
+
+$dark_1: @background4@;
+$dark_2: @background3@;
+$dark_3: @background2@;
+$dark_4: @background1@;
+$dark_5: @background0@;
+
+$base_color: if($variant == 'light', $light_1, lighten(desaturate($dark_4, 100%), 2%));
+$text_color: if($variant == 'light', black, white);
+$bg_color: if($variant == 'light', $light_2, darken(desaturate($dark_3, 100%), 4%));
+$fg_color: if($variant == 'light', #2e3436, #eeeeec);
+
+$selected_fg_color: $light_1;
+$selected_bg_color: if($variant == 'light', $blue_3, darken($blue_3, 20%));
+$selected_borders_color: if($variant== 'light', darken($selected_bg_color, 15%), darken($selected_bg_color, 30%));
+$borders_color: if($variant == 'light', darken($bg_color, 18%), darken($bg_color, 10%));
+$alt_borders_color: if($variant == 'light', darken($bg_color, 24%), darken($bg_color, 18%));
+$borders_edge: if($variant == 'light', transparentize(white, 0.2), transparentize($fg_color, 0.93));
+$link_color: if($variant == 'light', darken($selected_bg_color, 10%), lighten($selected_bg_color, 20%));
+$link_visited_color: if($variant == 'light', darken($selected_bg_color, 20%), lighten($selected_bg_color, 10%));
+$top_hilight: $borders_edge;
+$dark_fill: mix($borders_color, $bg_color, 50%);
+$headerbar_color: if($variant == 'light', lighten($bg_color, 5%), darken($bg_color, 3%));
+$menu_color: if($variant == 'light', $base_color, mix($bg_color, $base_color, 20%));
+$popover_bg_color: $bg_color;
+$popover_hover_color: lighten($bg_color, 5%);
+
+$scrollbar_bg_color: if($variant == 'light', mix($bg_color, $fg_color, 80%), mix($base_color, $bg_color, 50%));
+$scrollbar_slider_color: mix($fg_color, $bg_color, 60%);
+$scrollbar_slider_hover_color: mix($fg_color, $bg_color, 80%);
+$scrollbar_slider_active_color: if($variant=='light', darken($selected_bg_color, 10%), lighten($selected_bg_color, 10%));
+
+$warning_color: #f57900;
+$error_color: #cc0000;
+$success_color: if($variant == 'light', $green_3, darken($green_3, 10%));
+$destructive_color: if($variant == 'light', $red_3, darken($red_3, 10%));
+
+$osd_fg_color: #eeeeec;
+$osd_text_color: white;
+$osd_bg_color: if($variant == 'light', transparentize(darken(desaturate($dark_3, 100%), 4%),0.1), transparentize(darken(desaturate($dark_3, 100%), 10%),0.1));
+$osd_insensitive_bg_color: transparentize(mix($osd_fg_color, opacify($osd_bg_color, 1), 10%), 0.5);
+$osd_insensitive_fg_color: mix($osd_fg_color, opacify($osd_bg_color, 1), 50%);
+$osd_borders_color: transparentize(black, 0.3);
+
+$sidebar_bg_color: mix($bg_color, $base_color, 50%);
+$base_hover_color: transparentize($fg_color, 0.95);
+
+$tooltip_borders_color: transparentize(white, 0.9);
+$shadow_color: transparentize(black, 0.9);
+
+$drop_target_color: #4e9a06;
+
+//insensitive state derived colors
+$insensitive_fg_color: mix($fg_color, $bg_color, 50%);
+$insensitive_bg_color: mix($bg_color, $base_color, 60%);
+$insensitive_borders_color: $borders_color;
+
+//colors for the backdrop state, derived from the main colors.
+$backdrop_base_color: if($variant == 'light', darken($base_color, 1%), lighten($base_color, 1%));
+$backdrop_text_color: mix($text_color, $backdrop_base_color, 80%);
+$backdrop_bg_color: $bg_color;
+$backdrop_fg_color: mix($fg_color, $backdrop_bg_color, 50%);
+$backdrop_insensitive_color: if($variant == 'light', darken($backdrop_bg_color, 15%), lighten($backdrop_bg_color, 15%));
+$backdrop_selected_fg_color: if($variant == 'light', $backdrop_base_color, $backdrop_text_color);
+$backdrop_borders_color: mix($borders_color, $bg_color, 80%);
+$backdrop_dark_fill: mix($backdrop_borders_color, $backdrop_bg_color, 35%);
+$backdrop_sidebar_bg_color: mix($backdrop_bg_color, $backdrop_base_color, 50%);
+
+$backdrop_scrollbar_bg_color: darken($backdrop_bg_color, 3%);
+$backdrop_scrollbar_slider_color: mix($backdrop_fg_color, $backdrop_bg_color, 40%);
+
+$backdrop_menu_color: if($variant == 'light', $backdrop_base_color, mix($backdrop_bg_color, $backdrop_base_color, 20%));
+
+//special cased widget colors
+$suggested_bg_color: $selected_bg_color;
+$suggested_border_color: $selected_borders_color;
+$progress_bg_color: $selected_bg_color;
+$progress_border_color: $selected_borders_color;
+$checkradio_bg_color: if($variant == 'light', $selected_bg_color, lighten($selected_bg_color,10%));
+$checkradio_fg_color: $selected_fg_color;
+$checkradio_borders_color: if($variant == 'light', darken($checkradio_bg_color,20%), darken($checkradio_bg_color,40%));
diff --git a/usecases/desktop/graphical/gtk.nix b/usecases/desktop/graphical/gtk.nix
index 4a9f501..0151492 100644
--- a/usecases/desktop/graphical/gtk.nix
+++ b/usecases/desktop/graphical/gtk.nix
@@ -4,6 +4,32 @@ inputs: {
   pkgs,
   ...
 }: let
+  gtk3Colors = ./gtk-colors.scss;
+
+  gtk3CssFile =
+    pkgs.stdenv.mkDerivation ({
+      name = "gtk3.css";
+
+      src = pkgs.gtk3.src;
+
+      nativeBuildInputs = with pkgs; [sassc];
+
+      patchPhase = ''
+        cp -f ${gtk3Colors} gtk/theme/Adwaita/_colors.scss
+        substituteAllInPlace gtk/theme/Adwaita/_colors.scss
+      '';
+
+      dontConfigure = true;
+      dontInstall = true;
+
+      buildPhase = ''
+        sassc -a -M -t expanded gtk/theme/Adwaita/gtk-contained-dark.scss $out
+        # These lines contains includes of assets
+        sed -i -e '/-gtk-icon/d' $out;
+      '';
+    }
+    // config.theme.colors);
+
   gtk4NamedColors = with config.theme.colors; {
     # From the main CSS
     # -----------------
@@ -94,7 +120,7 @@ in {
     };
 
     xdg.configFile = {
-      # "gtk-3.0/gtk.css".source = gtkCssFile;
+      "gtk-3.0/gtk.css".source = gtk3CssFile;
       "gtk-4.0/gtk.css".source = gtk4CssFile;
     };
   };