feat: add niri module

hm/modules/linux/desktop-environment/default.nix

@@ -6,6 +6,7 @@
 {
   imports = [
     ./hyprland
+    ./niri
     ./waybar
     ./swaync.nix
   ];

hm/modules/linux/desktop-environment/niri/config.kdl

@@ -0,0 +1,509 @@
+// This config is in the KDL format: https://kdl.dev
+// "/-" comments out the following node.
+// Check the wiki for a full description of the configuration:
+// https://github.com/YaLTeR/niri/wiki/Configuration:-Overview
+
+// Input device configuration.
+// Find the full list of options on the wiki:
+// https://github.com/YaLTeR/niri/wiki/Configuration:-Input
+input {
+    keyboard {
+        xkb {
+            // You can set rules, model, layout, variant and options.
+            // For more information, see xkeyboard-config(7).
+
+            // For example:
+            // layout "us,ru"
+            // options "grp:win_space_toggle,compose:ralt,ctrl:nocaps"
+        }
+    }
+
+    // Next sections include libinput settings.
+    // Omitting settings disables them, or leaves them at their default values.
+    touchpad {
+        // off
+        tap
+        // dwt
+        // dwtp
+        natural-scroll
+        // accel-speed 0.2
+        // accel-profile "flat"
+        // scroll-method "two-finger"
+        // disabled-on-external-mouse
+    }
+
+    mouse {
+        // off
+        // natural-scroll
+        // accel-speed 0.2
+        // accel-profile "flat"
+        // scroll-method "no-scroll"
+    }
+
+    trackpoint {
+        // off
+        // natural-scroll
+        // accel-speed 0.2
+        // accel-profile "flat"
+        // scroll-method "on-button-down"
+        // scroll-button 273
+        // middle-emulation
+    }
+
+    // Uncomment this to make the mouse warp to the center of newly focused windows.
+    // warp-mouse-to-focus
+
+    // Focus windows and outputs automatically when moving the mouse into them.
+    // Setting max-scroll-amount="0%" makes it work only on windows already fully on screen.
+    // focus-follows-mouse max-scroll-amount="0%"
+}
+
+// You can configure outputs by their name, which you can find
+// by running `niri msg outputs` while inside a niri instance.
+// The built-in laptop monitor is usually called "eDP-1".
+// Find more information on the wiki:
+// https://github.com/YaLTeR/niri/wiki/Configuration:-Outputs
+// Remember to uncomment the node by removing "/-"!
+/-output "eDP-1" {
+    // Uncomment this line to disable this output.
+    // off
+
+    // Resolution and, optionally, refresh rate of the output.
+    // The format is "<width>x<height>" or "<width>x<height>@<refresh rate>".
+    // If the refresh rate is omitted, niri will pick the highest refresh rate
+    // for the resolution.
+    // If the mode is omitted altogether or is invalid, niri will pick one automatically.
+    // Run `niri msg outputs` while inside a niri instance to list all outputs and their modes.
+    mode "1920x1080@120.030"
+
+    // You can use integer or fractional scale, for example use 1.5 for 150% scale.
+    scale 2
+
+    // Transform allows to rotate the output counter-clockwise, valid values are:
+    // normal, 90, 180, 270, flipped, flipped-90, flipped-180 and flipped-270.
+    transform "normal"
+
+    // Position of the output in the global coordinate space.
+    // This affects directional monitor actions like "focus-monitor-left", and cursor movement.
+    // The cursor can only move between directly adjacent outputs.
+    // Output scale and rotation has to be taken into account for positioning:
+    // outputs are sized in logical, or scaled, pixels.
+    // For example, a 3840×2160 output with scale 2.0 will have a logical size of 1920×1080,
+    // so to put another output directly adjacent to it on the right, set its x to 1920.
+    // If the position is unset or results in an overlap, the output is instead placed
+    // automatically.
+    position x=1280 y=0
+}
+
+// Settings that influence how windows are positioned and sized.
+// Find more information on the wiki:
+// https://github.com/YaLTeR/niri/wiki/Configuration:-Layout
+layout {
+    // Set gaps around windows in logical pixels.
+    gaps 16
+
+    // When to center a column when changing focus, options are:
+    // - "never", default behavior, focusing an off-screen column will keep at the left
+    //   or right edge of the screen.
+    // - "always", the focused column will always be centered.
+    // - "on-overflow", focusing a column will center it if it doesn't fit
+    //   together with the previously focused column.
+    center-focused-column "on-overflow"
+
+    // You can customize the widths that "switch-preset-column-width" (Mod+R) toggles between.
+    preset-column-widths {
+        // Proportion sets the width as a fraction of the output width, taking gaps into account.
+        // For example, you can perfectly fit four windows sized "proportion 0.25" on an output.
+        // The default preset widths are 1/3, 1/2 and 2/3 of the output.
+        proportion 0.33333
+        proportion 0.5
+        proportion 0.66667
+
+        // Fixed sets the width in logical pixels exactly.
+        // fixed 1920
+    }
+
+    // You can also customize the heights that "switch-preset-window-height" (Mod+Shift+R) toggles between.
+    // preset-window-heights { }
+
+    // You can change the default width of the new windows.
+    default-column-width { proportion 0.5; }
+    // If you leave the brackets empty, the windows themselves will decide their initial width.
+    // default-column-width {}
+
+    // By default focus ring and border are rendered as a solid background rectangle
+    // behind windows. That is, they will show up through semitransparent windows.
+    // This is because windows using client-side decorations can have an arbitrary shape.
+    //
+    // If you don't like that, you should uncomment `prefer-no-csd` below.
+    // Niri will draw focus ring and border *around* windows that agree to omit their
+    // client-side decorations.
+    //
+    // Alternatively, you can override it with a window rule called
+    // `draw-border-with-background`.
+
+    // You can change how the focus ring looks.
+    focus-ring {
+        // Uncomment this line to disable the focus ring.
+        // off
+
+        // How many logical pixels the ring extends out from the windows.
+        width 4
+
+        // Colors can be set in a variety of ways:
+        // - CSS named colors: "red"
+        // - RGB hex: "#rgb", "#rgba", "#rrggbb", "#rrggbbaa"
+        // - CSS-like notation: "rgb(255, 127, 0)", rgba(), hsl() and a few others.
+
+        // Color of the ring on the active monitor.
+        active-color "#7fc8ff"
+
+        // Color of the ring on inactive monitors.
+        inactive-color "#505050"
+
+        // You can also use gradients. They take precedence over solid colors.
+        // Gradients are rendered the same as CSS linear-gradient(angle, from, to).
+        // The angle is the same as in linear-gradient, and is optional,
+        // defaulting to 180 (top-to-bottom gradient).
+        // You can use any CSS linear-gradient tool on the web to set these up.
+        // Changing the color space is also supported, check the wiki for more info.
+        //
+        // active-gradient from="#80c8ff" to="#bbddff" angle=45
+
+        // You can also color the gradient relative to the entire view
+        // of the workspace, rather than relative to just the window itself.
+        // To do that, set relative-to="workspace-view".
+        //
+        // inactive-gradient from="#505050" to="#808080" angle=45 relative-to="workspace-view"
+    }
+
+    // You can also add a border. It's similar to the focus ring, but always visible.
+    border {
+        // The settings are the same as for the focus ring.
+        // If you enable the border, you probably want to disable the focus ring.
+        off
+
+        width 4
+        active-color "#ffc87f"
+        inactive-color "#505050"
+
+        // active-gradient from="#ffbb66" to="#ffc880" angle=45 relative-to="workspace-view"
+        // inactive-gradient from="#505050" to="#808080" angle=45 relative-to="workspace-view"
+    }
+
+    // Struts shrink the area occupied by windows, similarly to layer-shell panels.
+    // You can think of them as a kind of outer gaps. They are set in logical pixels.
+    // Left and right struts will cause the next window to the side to always be visible.
+    // Top and bottom struts will simply add outer gaps in addition to the area occupied by
+    // layer-shell panels and regular gaps.
+    struts {
+        // left 64
+        // right 64
+        // top 64
+        // bottom 64
+    }
+}
+
+// Add lines like this to spawn processes at startup.
+// Note that running niri as a session supports xdg-desktop-autostart,
+// which may be more convenient to use.
+// See the binds section below for more spawn examples.
+// spawn-at-startup "alacritty" "-e" "fish"
+
+// Uncomment this line to ask the clients to omit their client-side decorations if possible.
+// If the client will specifically ask for CSD, the request will be honored.
+// Additionally, clients will be informed that they are tiled, removing some client-side rounded corners.
+// This option will also fix border/focus ring drawing behind some semitransparent windows.
+// After enabling or disabling this, you need to restart the apps for this to take effect.
+prefer-no-csd
+
+// You can change the path where screenshots are saved.
+// A ~ at the front will be expanded to the home directory.
+// The path is formatted with strftime(3) to give you the screenshot date and time.
+screenshot-path "~/Pictures/Screenshots/Screenshot from %Y-%m-%d %H-%M-%S.png"
+
+// You can also set this to null to disable saving screenshots to disk.
+// screenshot-path null
+
+// Animation settings.
+// The wiki explains how to configure individual animations:
+// https://github.com/YaLTeR/niri/wiki/Configuration:-Animations
+animations {
+    // Uncomment to turn off all animations.
+    // off
+
+    // Slow down all animations by this factor. Values below 1 speed them up instead.
+    // slowdown 3.0
+}
+
+// Window rules let you adjust behavior for individual windows.
+// Find more information on the wiki:
+// https://github.com/YaLTeR/niri/wiki/Configuration:-Window-Rules
+
+// Work around WezTerm's initial configure bug
+// by setting an empty default-column-width.
+window-rule {
+    // This regular expression is intentionally made as specific as possible,
+    // since this is the default config, and we want no false positives.
+    // You can get away with just app-id="wezterm" if you want.
+    match app-id=r#"^org\.wezfurlong\.wezterm$"#
+    default-column-width {}
+}
+
+// Open the Firefox picture-in-picture player as floating by default.
+window-rule {
+    // This app-id regular expression will work for both:
+    // - host Firefox (app-id is "firefox")
+    // - Flatpak Firefox (app-id is "org.mozilla.firefox")
+    match app-id=r#"firefox$"# title="^Picture-in-Picture$"
+    open-floating true
+}
+
+// Example: block out two password managers from screen capture.
+// (This example rule is commented out with a "/-" in front.)
+/-window-rule {
+    match app-id=r#"^org\.keepassxc\.KeePassXC$"#
+    match app-id=r#"^org\.gnome\.World\.Secrets$"#
+
+    block-out-from "screen-capture"
+
+    // Use this instead if you want them visible on third-party screenshot tools.
+    // block-out-from "screencast"
+}
+
+// Example: enable rounded corners for all windows.
+// (This example rule is commented out with a "/-" in front.)
+window-rule {
+    geometry-corner-radius 12
+    clip-to-geometry true
+}
+
+binds {
+    // Keys consist of modifiers separated by + signs, followed by an XKB key name
+    // in the end. To find an XKB name for a particular key, you may use a program
+    // like wev.
+    //
+    // "Mod" is a special modifier equal to Super when running on a TTY, and to Alt
+    // when running as a winit window.
+    //
+    // Most actions that you can bind here can also be invoked programmatically with
+    // `niri msg action do-something`.
+
+    // Mod-Shift-/, which is usually the same as Mod-?,
+    // shows a list of important hotkeys.
+    Mod+Shift+Slash { show-hotkey-overlay; }
+
+    // Suggested binds for running programs: terminal, app launcher, screen locker.
+    Mod+T { spawn "kitty"; }
+    Mod+D { spawn "bash" "-c" "pkill -9 rofi || rofi -show drun"; }
+    Super+Alt+L { spawn "loginctl lock-session"; }
+
+    // You can also use a shell. Do this if you need pipes, multiple commands, etc.
+    // Note: the entire command goes as a single argument in the end.
+    // Mod+T { spawn "bash" "-c" "notify-send hello && exec alacritty"; }
+
+    // Example volume keys mappings for PipeWire & WirePlumber.
+    // The allow-when-locked=true property makes them work even when the session is locked.
+    XF86AudioRaiseVolume allow-when-locked=true { spawn "wpctl" "set-volume" "@DEFAULT_AUDIO_SINK@" "0.1+"; }
+    XF86AudioLowerVolume allow-when-locked=true { spawn "wpctl" "set-volume" "@DEFAULT_AUDIO_SINK@" "0.1-"; }
+    XF86AudioMute        allow-when-locked=true { spawn "wpctl" "set-mute" "@DEFAULT_AUDIO_SINK@" "toggle"; }
+    XF86AudioMicMute     allow-when-locked=true { spawn "wpctl" "set-mute" "@DEFAULT_AUDIO_SOURCE@" "toggle"; }
+
+    Mod+Q { close-window; }
+
+    Mod+Left  { focus-column-left; }
+    Mod+Down  { focus-window-down; }
+    Mod+Up    { focus-window-up; }
+    Mod+Right { focus-column-right; }
+    Mod+H     { focus-column-left; }
+    Mod+J     { focus-window-down; }
+    Mod+K     { focus-window-up; }
+    Mod+L     { focus-column-right; }
+
+    Mod+Ctrl+Left  { move-column-left; }
+    Mod+Ctrl+Down  { move-window-down; }
+    Mod+Ctrl+Up    { move-window-up; }
+    Mod+Ctrl+Right { move-column-right; }
+    Mod+Ctrl+H     { move-column-left; }
+    Mod+Ctrl+J     { move-window-down; }
+    Mod+Ctrl+K     { move-window-up; }
+    Mod+Ctrl+L     { move-column-right; }
+
+    // Alternative commands that move across workspaces when reaching
+    // the first or last window in a column.
+    // Mod+J     { focus-window-or-workspace-down; }
+    // Mod+K     { focus-window-or-workspace-up; }
+    // Mod+Ctrl+J     { move-window-down-or-to-workspace-down; }
+    // Mod+Ctrl+K     { move-window-up-or-to-workspace-up; }
+
+    Mod+Home { focus-column-first; }
+    Mod+End  { focus-column-last; }
+    Mod+Ctrl+Home { move-column-to-first; }
+    Mod+Ctrl+End  { move-column-to-last; }
+
+    Mod+Shift+Left  { focus-monitor-left; }
+    Mod+Shift+Down  { focus-monitor-down; }
+    Mod+Shift+Up    { focus-monitor-up; }
+    Mod+Shift+Right { focus-monitor-right; }
+    Mod+Shift+H     { focus-monitor-left; }
+    Mod+Shift+J     { focus-monitor-down; }
+    Mod+Shift+K     { focus-monitor-up; }
+    Mod+Shift+L     { focus-monitor-right; }
+
+    Mod+Shift+Ctrl+Left  { move-column-to-monitor-left; }
+    Mod+Shift+Ctrl+Down  { move-column-to-monitor-down; }
+    Mod+Shift+Ctrl+Up    { move-column-to-monitor-up; }
+    Mod+Shift+Ctrl+Right { move-column-to-monitor-right; }
+    Mod+Shift+Ctrl+H     { move-column-to-monitor-left; }
+    Mod+Shift+Ctrl+J     { move-column-to-monitor-down; }
+    Mod+Shift+Ctrl+K     { move-column-to-monitor-up; }
+    Mod+Shift+Ctrl+L     { move-column-to-monitor-right; }
+
+    // Alternatively, there are commands to move just a single window:
+    // Mod+Shift+Ctrl+Left  { move-window-to-monitor-left; }
+    // ...
+
+    // And you can also move a whole workspace to another monitor:
+    // Mod+Shift+Ctrl+Left  { move-workspace-to-monitor-left; }
+    // ...
+
+    Mod+Page_Down      { focus-workspace-down; }
+    Mod+Page_Up        { focus-workspace-up; }
+    Mod+U              { focus-workspace-down; }
+    Mod+I              { focus-workspace-up; }
+    Mod+Ctrl+Page_Down { move-column-to-workspace-down; }
+    Mod+Ctrl+Page_Up   { move-column-to-workspace-up; }
+    Mod+Ctrl+U         { move-column-to-workspace-down; }
+    Mod+Ctrl+I         { move-column-to-workspace-up; }
+
+    // Alternatively, there are commands to move just a single window:
+    // Mod+Ctrl+Page_Down { move-window-to-workspace-down; }
+    // ...
+
+    Mod+Shift+Page_Down { move-workspace-down; }
+    Mod+Shift+Page_Up   { move-workspace-up; }
+    Mod+Shift+U         { move-workspace-down; }
+    Mod+Shift+I         { move-workspace-up; }
+
+    // You can bind mouse wheel scroll ticks using the following syntax.
+    // These binds will change direction based on the natural-scroll setting.
+    //
+    // To avoid scrolling through workspaces really fast, you can use
+    // the cooldown-ms property. The bind will be rate-limited to this value.
+    // You can set a cooldown on any bind, but it's most useful for the wheel.
+    Mod+WheelScrollDown      cooldown-ms=150 { focus-workspace-down; }
+    Mod+WheelScrollUp        cooldown-ms=150 { focus-workspace-up; }
+    Mod+Ctrl+WheelScrollDown cooldown-ms=150 { move-column-to-workspace-down; }
+    Mod+Ctrl+WheelScrollUp   cooldown-ms=150 { move-column-to-workspace-up; }
+
+    Mod+WheelScrollRight      { focus-column-right; }
+    Mod+WheelScrollLeft       { focus-column-left; }
+    Mod+Ctrl+WheelScrollRight { move-column-right; }
+    Mod+Ctrl+WheelScrollLeft  { move-column-left; }
+
+    // Usually scrolling up and down with Shift in applications results in
+    // horizontal scrolling; these binds replicate that.
+    Mod+Shift+WheelScrollDown      { focus-column-right; }
+    Mod+Shift+WheelScrollUp        { focus-column-left; }
+    Mod+Ctrl+Shift+WheelScrollDown { move-column-right; }
+    Mod+Ctrl+Shift+WheelScrollUp   { move-column-left; }
+
+    // Similarly, you can bind touchpad scroll "ticks".
+    // Touchpad scrolling is continuous, so for these binds it is split into
+    // discrete intervals.
+    // These binds are also affected by touchpad's natural-scroll, so these
+    // example binds are "inverted", since we have natural-scroll enabled for
+    // touchpads by default.
+    // Mod+TouchpadScrollDown { spawn "wpctl" "set-volume" "@DEFAULT_AUDIO_SINK@" "0.02+"; }
+    // Mod+TouchpadScrollUp   { spawn "wpctl" "set-volume" "@DEFAULT_AUDIO_SINK@" "0.02-"; }
+
+    // You can refer to workspaces by index. However, keep in mind that
+    // niri is a dynamic workspace system, so these commands are kind of
+    // "best effort". Trying to refer to a workspace index bigger than
+    // the current workspace count will instead refer to the bottommost
+    // (empty) workspace.
+    //
+    // For example, with 2 workspaces + 1 empty, indices 3, 4, 5 and so on
+    // will all refer to the 3rd workspace.
+    Mod+1 { focus-workspace 1; }
+    Mod+2 { focus-workspace 2; }
+    Mod+3 { focus-workspace 3; }
+    Mod+4 { focus-workspace 4; }
+    Mod+5 { focus-workspace 5; }
+    Mod+6 { focus-workspace 6; }
+    Mod+7 { focus-workspace 7; }
+    Mod+8 { focus-workspace 8; }
+    Mod+9 { focus-workspace 9; }
+    Mod+Ctrl+1 { move-column-to-workspace 1; }
+    Mod+Ctrl+2 { move-column-to-workspace 2; }
+    Mod+Ctrl+3 { move-column-to-workspace 3; }
+    Mod+Ctrl+4 { move-column-to-workspace 4; }
+    Mod+Ctrl+5 { move-column-to-workspace 5; }
+    Mod+Ctrl+6 { move-column-to-workspace 6; }
+    Mod+Ctrl+7 { move-column-to-workspace 7; }
+    Mod+Ctrl+8 { move-column-to-workspace 8; }
+    Mod+Ctrl+9 { move-column-to-workspace 9; }
+
+    // Alternatively, there are commands to move just a single window:
+    // Mod+Ctrl+1 { move-window-to-workspace 1; }
+
+    // Switches focus between the current and the previous workspace.
+    // Mod+Tab { focus-workspace-previous; }
+
+    // The following binds move the focused window in and out of a column.
+    // If the window is alone, they will consume it into the nearby column to the side.
+    // If the window is already in a column, they will expel it out.
+    Mod+BracketLeft  { consume-or-expel-window-left; }
+    Mod+BracketRight { consume-or-expel-window-right; }
+
+    // Consume one window from the right to the bottom of the focused column.
+    Mod+Comma  { consume-window-into-column; }
+    // Expel the bottom window from the focused column to the right.
+    Mod+Period { expel-window-from-column; }
+
+    Mod+R { switch-preset-column-width; }
+    Mod+Shift+R { switch-preset-window-height; }
+    Mod+Ctrl+R { reset-window-height; }
+    Mod+F { maximize-column; }
+    Mod+Shift+F { fullscreen-window; }
+    Mod+C { center-column; }
+
+    // Finer width adjustments.
+    // This command can also:
+    // * set width in pixels: "1000"
+    // * adjust width in pixels: "-5" or "+5"
+    // * set width as a percentage of screen width: "25%"
+    // * adjust width as a percentage of screen width: "-10%" or "+10%"
+    // Pixel sizes use logical, or scaled, pixels. I.e. on an output with scale 2.0,
+    // set-column-width "100" will make the column occupy 200 physical screen pixels.
+    Mod+Minus { set-column-width "-10%"; }
+    Mod+Equal { set-column-width "+10%"; }
+
+    // Finer height adjustments when in column with other windows.
+    Mod+Shift+Minus { set-window-height "-10%"; }
+    Mod+Shift+Equal { set-window-height "+10%"; }
+
+    // Move the focused window between the floating and the tiling layout.
+    Mod+V       { toggle-window-floating; }
+    Mod+Shift+V { switch-focus-between-floating-and-tiling; }
+
+    // Actions to switch layouts.
+    // Note: if you uncomment these, make sure you do NOT have
+    // a matching layout switch hotkey configured in xkb options above.
+    // Having both at once on the same hotkey will break the switching,
+    // since it will switch twice upon pressing the hotkey (once by xkb, once by niri).
+    // Mod+Space       { switch-layout "next"; }
+    // Mod+Shift+Space { switch-layout "prev"; }
+
+    Print { screenshot; }
+    Ctrl+Print { screenshot-screen; }
+    Alt+Print { screenshot-window; }
+
+    // The quit action will show a confirmation dialog to avoid accidental exits.
+    Mod+Shift+E { quit; }
+    Ctrl+Alt+Delete { quit; }
+
+    // Powers off the monitors. To turn them back on, do any input like
+    // moving the mouse or pressing any other key.
+    Mod+Shift+P { power-off-monitors; }
+}

hm/modules/linux/desktop-environment/niri/default.nix

@@ -0,0 +1,19 @@
+{ lib, config, ... }:
+let
+  cfg = config.liminalOS.desktop.niri;
+in
+{
+  options.liminalOS.desktop.niri = {
+    enable = lib.mkOption {
+      type = lib.types.bool;
+      default = false;
+      description = ''
+        Whether to enable and rice Niri.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    xdg.configFile."niri/config.kdl".source = config.lib.file.mkOutOfStoreSymlink ./config.kdl;
+  };
+}

modules/linux/desktop-environment/default.nix

@@ -23,6 +23,7 @@ in
         Whether to enable Hyprland. Sets up a default configuration at the system and user level, and installs xdg-desktop-portal-gtk.
       '';
     };
+    niri.enable = lib.mkEnableOption "Niri compositor";
   };
 
   config = lib.mkIf cfg.enable {
@@ -33,6 +34,10 @@ in
 
     programs.hyprland.enable = cfg.hyprland.enable;
 
+    programs.niri.enable = cfg.niri.enable;
+
+    programs.xwayland.enable = lib.mkIf cfg.niri.enable (lib.mkForce true);
+
     services.xserver.enable = false;
 
     services.xserver = {