From 3a842d0beff32a5a647c6b6a4364f83846df81ac Mon Sep 17 00:00:00 2001
From: Minijackson <minijackson@riseup.net>
Date: Wed, 23 Jun 2021 10:42:17 +0200
Subject: graphical: set icon and gtk theme

---
 lib/override-arc-theme.nix     | 110 +++++++++++++++++++++++++++++++++++++++++
 usecases/desktop/graphical.nix |  22 ++++++++-
 2 files changed, 131 insertions(+), 1 deletion(-)
 create mode 100644 lib/override-arc-theme.nix

diff --git a/lib/override-arc-theme.nix b/lib/override-arc-theme.nix
new file mode 100644
index 0000000..614cffd
--- /dev/null
+++ b/lib/override-arc-theme.nix
@@ -0,0 +1,110 @@
+{ lib, themeConfig, ... }:
+
+let
+  # Thank you:
+  # https://github.com/vedard/Arc-Theme-Generator/blob/master/arc-theme-generator.py
+  colorMapping = with themeConfig.colors;
+  with import ./theme.nix { inherit lib; };
+  let
+    hex2RgbaPrefix = color:
+      let rgb = hex2RGB color;
+        in "rgba(${toString rgb.red}, ${toString rgb.green}, ${toString rgb.blue}";
+  in {
+    "#5294e2" = dominant; # Dominant color
+    # Same but allows opacity
+    "rgba(82, 148, 226" = hex2RgbaPrefix dominant;
+    "#6ba4e7" = dominant; # Dominant color but in icons
+
+    # TODO: this should be slightly lighter
+    "#4dadd4" = dominant; # Lighter Dominant color
+    # Same but allows opacity
+    "rgba(77, 173, 212" = hex2RgbaPrefix dominant;
+
+      #"#252a35" = "#121212";  # Gnome Panel Background
+      #"#262932" = "#101010";  # Dark WM bordard
+    "#2f343f" = background0;  # Dark Header BG
+    # Same but allows opacity
+    "rgba(47, 52, 63" = hex2RgbaPrefix background0;  # Dark Header BG
+      #"#e7e8eb" = "#e8e8e8";  # Light Header BG
+    "#383c4a" = background;  # Dark Background
+    # Same but allows opacity
+    "rgba(56, 60, 74" = hex2RgbaPrefix background;
+    "#d3dae3" = foreground;  # Dark Foreground
+    # Same but allows opacity
+    "rgba(211, 218, 227" = hex2RgbaPrefix foreground;
+    "#f5f6f7" = lightBackground;  # Light Background
+    "#3b3e45" = foreground;  # Light Foreground
+
+    "#404552" = softBackground;  # Dark Base Background (ListBox)
+    # Same but allows opacity
+    "rgba(64, 69, 82" = hex2RgbaPrefix softBackground;
+    "#3c4150" = softBackground;  # Sidebars
+    "#353945" = softBackground;  # Dark SideBar Background (Nautilus)
+    "rgba(53, 57, 69, 0.95)" = background2; # Nautilus SideBar
+    "#bac3cf" = foreground;  # Dark SideBar Foreground (Nautilus)
+
+    "rgba(95, 105, 127, 0.37)" = background2; # Buttons?
+    "rgba(134, 144, 165, 0.37)" = background3; # Buttons? hover
+    "#484c59" = background2; # Popover menu button hover
+
+    # Lots of text
+    "rgba(207, 218, 231" = hex2RgbaPrefix foreground;
+    # Some more labels (list sorting)
+    "#b6bcc6" = dimForeground;
+    # Action icons
+    "#9699a2" = dimForeground;
+    # Links
+    "#a9caf1" = brightBlue;
+
+    # List element Hover / Selected
+    "#4a85cb" = dimDominant;
+
+      #"#323644" = "#202020";  # Dark Gnome Shell Modal background
+
+    # Light Gnome Shell Foreground
+    "#5c616c" = foreground;
+    "rgba(92, 97, 108" = hex2RgbaPrefix foreground;
+
+      #"#2d323d" = "#171717";  # Dark Checkbox Background
+      #"#5b627b" = "#505050";  # Dark Switch Background
+      #"#353a47" = "#232323";  # Dark Switch Circle
+      #"#cfd6e6" = "#dbdbdb";  # Light Switch Background
+    "#444a58" = background2;  # Gtk2 Dark Button Background
+    "#505666" = background3;  # Gtk2 Dark Button-Hover Background
+    "#3e4351" = background;  # Gtk2 Dark Button-insensitive Background
+    "#2e3340" = background0;  # Gtk2 Dark Button-active Background
+    # More insensitive buttons :'-(
+    "rgba(68, 74, 88" = hex2RgbaPrefix background0;
+
+    "#4b5162" = background;  # Gtk2 Dark Tooltips Background
+    "#3e4350" = background0;  # Gtk2 Dark Insensitive Background
+      #"#262934" = "#0E0E0E";  # Gtk2 Dark checkbox-unchecked border
+      #"#2b303b" = "#151515";  # Gtk2 Dark checkbox-unchecked Background
+      #"#3e434f" = "#282828";  # Gtk2 Dark scrollbar Background
+      #"#2d303b" = "#151515";  # Gtk2 Dark trough Background
+      #"#767b87" = "#606060";  # Gtk2 Dark slider Background
+      #"#303440" = "#191919";  # Gtk2 Dark border insensitive
+      #"#2b2e39" = "#131313";  # Gtk2 Dark border
+    "#313541" = background0;  # Gtk2 Dark inline toolbar
+  };
+
+  #substituteArguments = with lib; concatStrings (foldAttrs (previousColor: newColor: "--replace ${previousColor} ${newColor} ") [] [colorMapping]);
+  substituteArguments = with lib;
+  concatStrings
+    (mapAttrsToList
+      (previousColor: newColor: "--replace '${previousColor}' '${newColor}' --replace '${toUpper previousColor}' '${newColor}' ")
+      colorMapping);
+in
+  package:
+
+package.overrideAttrs (oldAttrs: {
+  name = if (oldAttrs ? name)
+         then "gruvbox-${oldAttrs.name}"
+         else "gruvbox-${oldAttrs.pname}-${oldAttrs.version}";
+  postPatch = ''
+    # For every plaintext file
+    for file in $(find . -type f -exec grep -Iq . {} \; -and -print); do
+      substituteInPlace "$file" ${substituteArguments} 2>/dev/null
+    done
+  '';
+})
diff --git a/usecases/desktop/graphical.nix b/usecases/desktop/graphical.nix
index 258f603..7b898ff 100644
--- a/usecases/desktop/graphical.nix
+++ b/usecases/desktop/graphical.nix
@@ -1,6 +1,6 @@
 inputs:
 
-{ pkgs, ... }:
+{ config, lib, pkgs, ... }:
 
 {
   imports = [
@@ -64,6 +64,26 @@ inputs:
   networking.firewall.allowedUDPPortRanges = [{ from = 1714; to = 1764; }];
 
   home-manager.users.minijackson = {
+    gtk =
+      let
+        override-arc-theme = import ../../lib/override-arc-theme.nix {
+          inherit lib;
+          themeConfig = config.theme;
+        };
+      in
+      {
+        enable = true;
+        iconTheme = {
+          # TODO: properly modify the colors
+          package = pkgs.arc-icon-theme;
+          name = "Arc";
+        };
+        theme = {
+          package = override-arc-theme pkgs.arc-theme;
+          name = "Arc-Dark";
+        };
+      };
+
     services.kdeconnect = {
       enable = true;
       indicator = true;
-- 
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