desktop: switched to niri from hyprland

- window manager hopping now goes to niri from hyprland
- added niri configuration closely resembling the keybindings and visual
  appearence as before
- updated all other modules like waybar to use niri instead of hyprland

1 files changed, 110 insertions, 0 deletions

diff --git a/modules/desktop/niri/default.nix b/modules/desktop/niri/default.nix
new file mode 100644
index 0000000..f1e0fa7
--- /dev/null
+++ b/modules/desktop/niri/default.nix
@@ -0,0 +1,110 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+{
+  imports = [ ./keybindings.nix ];
+
+  options.desktop.hardware.gpu = {
+    nvidia.enable = lib.mkEnableOption "Nvidia GPU Wayland optimizations";
+    amd.enable = lib.mkEnableOption "AMD GPU Wayland optimizations";
+  };
+
+  config = lib.mkIf config.desktop.enable {
+    home.sessionVariables = lib.mkMerge [
+      {
+        NIXOS_OZONE_WL = "1";
+        QT_QPA_PLATFORM = "wayland;xcb";
+        SDL_VIDEODRIVER = "wayland";
+        CLUTTER_BACKEND = "wayland";
+        GDK_SCALE = "1";
+        QT_SCALE_FACTOR = "1";
+        GTK_THEME = "Adwaita:dark";
+      }
+
+      (lib.mkIf config.desktop.hardware.gpu.nvidia.enable {
+        LIBVA_DRIVER_NAME = "nvidia";
+        __GLX_VENDOR_LIBRARY_NAME = "nvidia";
+        GBM_BACKEND = "nvidia-drm";
+        __GL_YIELD = "USLEEP";
+        __GL_VRR_ALLOWED = "0";
+      })
+
+      (lib.mkIf config.desktop.hardware.gpu.amd.enable {
+        AMD_VULKAN_ICD = "RADV";
+        MESA_VK_DEVICE_SELECT = "1002:";
+      })
+    ];
+
+    wayland.windowManager.niri = {
+      enable = true;
+      systemd.enable = true;
+    };
+
+    # Niri does not paint wallpapers itself, so start swaybg with the existing wallpaper.
+    home.packages = [ pkgs.swaybg ];
+
+    home.pointerCursor = {
+      enable = true;
+      package = pkgs.adwaita-icon-theme;
+      name = "Adwaita";
+      size = 20;
+      gtk.enable = true;
+      x11.enable = true;
+    };
+
+    wayland.windowManager.niri.extraConfigEarly = ''
+      input {
+        keyboard {
+          xkb {
+            layout "us"
+          }
+        }
+        touchpad {
+          natural-scroll
+          tap
+          dwt
+          click-method "clickfinger"
+          accel-speed 0.5
+        }
+      }
+
+      layout {
+        gaps 5
+        center-focused-column "on-overflow"
+        default-column-width { proportion 1.0; }
+        preset-column-widths {
+          proportion 0.5
+          proportion 1.0
+        }
+        focus-ring {
+          width 1
+          active-color "${config.scheme.withHashtag.base07}"
+          inactive-color "${config.scheme.withHashtag.base03}"
+        }
+        border { off; }
+        shadow { off; }
+      }
+
+      prefer-no-csd
+      screenshot-path "~/Pictures/Screenshots/Screenshot from %Y-%m-%d %H-%M-%S.png"
+      animations { off; }
+
+      spawn-at-startup "${lib.getExe pkgs.swaybg}" "-i" "${../../../assets/sapling.png}" "-m" "fill"
+
+      // Keep the familiar numbered workspaces persistent; Niri otherwise uses dynamic workspaces.
+      workspace "1"
+      workspace "2"
+      workspace "3"
+      workspace "4"
+      workspace "5"
+      workspace "6"
+      workspace "7"
+      workspace "8"
+      workspace "9"
+      workspace "10"
+    '';
+  };
+}