326 lines
8.9 KiB
Nix
326 lines
8.9 KiB
Nix
{ config, options, lib, pkgs, ... }:
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let
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inherit (builtins) elemAt isAttrs isBool length mapAttrs toJSON;
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inherit (lib)
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boolToString concatMapStringsSep concatStringsSep escape literalExpression
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mapAttrsToList mkEnableOption mkRenamedOptionModule mkRemovedOptionModule
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mkDefault mkIf mkOption optional types warn;
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cfg = config.services.picom;
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opt = options.services.picom;
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pairOf = x:
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with types;
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addCheck (listOf x) (y: length y == 2) // {
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description = "pair of ${x.description}";
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};
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mkDefaultAttrs = mapAttrs (n: v: mkDefault v);
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# Basically a tinkered lib.generators.mkKeyValueDefault
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# It either serializes a top-level definition "key: { values };"
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# or an expression "key = { values };"
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mkAttrsString = top:
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mapAttrsToList (k: v:
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let sep = if (top && isAttrs v) then ": " else " = ";
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in "${escape [ sep ] k}${sep}${mkValueString v};");
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# This serializes a Nix expression to the libconfig format.
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mkValueString = v:
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if types.bool.check v then
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boolToString v
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else if types.int.check v then
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toString v
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else if types.float.check v then
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toString v
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else if types.str.check v then
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''"${escape [ ''"'' ] v}"''
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else if builtins.isList v then
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"[ ${concatMapStringsSep " , " mkValueString v} ]"
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else if types.attrs.check v then
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"{ ${concatStringsSep " " (mkAttrsString false v)} }"
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else
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throw ''
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invalid expression used in option services.picom.settings:
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${v}
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'';
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toConf = attrs: concatStringsSep "\n" (mkAttrsString true cfg.settings);
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configFile = toConf cfg.settings;
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in {
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imports = [
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(mkRemovedOptionModule [ "services" "picom" "refreshRate" ]
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"The option `refresh-rate` has been deprecated by upstream.")
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(mkRemovedOptionModule [ "services" "picom" "experimentalBackends" ]
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"The option `--experimental-backends` has been removed by upstream.")
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(mkRemovedOptionModule [ "services" "picom" "extraOptions" ]
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"This option has been replaced by `services.picom.settings`.")
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(mkRenamedOptionModule [ "services" "picom" "opacityRule" ] [
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"services"
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"picom"
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"opacityRules"
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])
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];
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options.services.picom = {
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enable = mkEnableOption "Picom X11 compositor";
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fade = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Fade windows in and out.
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'';
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};
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fadeDelta = mkOption {
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type = types.ints.positive;
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default = 10;
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example = 5;
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description = ''
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Time between fade animation step (in ms).
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'';
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};
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fadeSteps = mkOption {
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type = pairOf (types.numbers.between 1.0e-2 1);
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default = [ 2.8e-2 3.0e-2 ];
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example = [ 4.0e-2 4.0e-2 ];
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description = ''
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Opacity change between fade steps (in and out).
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'';
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};
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fadeExclude = mkOption {
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type = types.listOf types.str;
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default = [ ];
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example = [ "window_type *= 'menu'" "name ~= 'Firefox$'" "focused = 1" ];
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description = ''
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List of conditions of windows that should not be faded.
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See <literal>picom(1)</literal> man page for more examples.
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'';
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};
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shadow = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Draw window shadows.
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'';
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};
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shadowOffsets = mkOption {
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type = pairOf types.int;
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default = [ (-15) (-15) ];
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example = [ (-10) (-15) ];
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description = ''
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Left and right offset for shadows (in pixels).
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'';
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};
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shadowOpacity = mkOption {
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type = types.numbers.between 0 1;
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default = 0.75;
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example = 0.8;
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description = ''
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Window shadows opacity.
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'';
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};
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shadowExclude = mkOption {
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type = types.listOf types.str;
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default = [ ];
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example = [ "window_type *= 'menu'" "name ~= 'Firefox$'" "focused = 1" ];
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description = ''
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List of conditions of windows that should have no shadow.
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See <literal>picom(1)</literal> man page for more examples.
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'';
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};
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activeOpacity = mkOption {
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type = types.numbers.between 0 1;
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default = 1.0;
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example = 0.8;
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description = ''
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Opacity of active windows.
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'';
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};
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inactiveOpacity = mkOption {
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type = types.numbers.between 0.1 1;
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default = 1.0;
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example = 0.8;
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description = ''
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Opacity of inactive windows.
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'';
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};
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menuOpacity = mkOption {
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type = types.numbers.between 0 1;
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default = 1.0;
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example = 0.8;
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description = ''
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Opacity of dropdown and popup menu.
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'';
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};
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wintypes = mkOption {
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type = types.attrs;
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default = {
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popup_menu = { opacity = cfg.menuOpacity; };
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dropdown_menu = { opacity = cfg.menuOpacity; };
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};
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defaultText = literalExpression ''
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{
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popup_menu = { opacity = config.${opt.menuOpacity}; };
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dropdown_menu = { opacity = config.${opt.menuOpacity}; };
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}
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'';
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example = { };
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description = ''
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Rules for specific window types.
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'';
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};
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opacityRules = mkOption {
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type = types.listOf types.str;
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default = [ ];
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example = [
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"95:class_g = 'URxvt' && !_NET_WM_STATE@:32a"
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"0:_NET_WM_STATE@:32a *= '_NET_WM_STATE_HIDDEN'"
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];
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description = ''
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Rules that control the opacity of windows, in format PERCENT:PATTERN.
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'';
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};
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backend = mkOption {
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type = types.enum [ "egl" "glx" "xrender" "xr_glx_hybrid" ];
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default = "xrender";
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description = ''
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Backend to use: <literal>egl</literal>, <literal>glx</literal>, <literal>xrender</literal> or <literal>xr_glx_hybrid</literal>.
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'';
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};
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vSync = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Enable vertical synchronization.
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'';
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};
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extraArgs = mkOption {
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type = with types; listOf str;
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default = [ ];
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example = literalExpression ''[ "--legacy-backends" ]'';
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description = ''
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Extra arguments to be passed to the picom executable.
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'';
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};
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package = mkOption {
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type = types.package;
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default = pkgs.picom;
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defaultText = literalExpression "pkgs.picom";
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example = literalExpression "pkgs.picom";
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description = ''
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Picom derivation to use.
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'';
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};
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settings = with types;
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let
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scalar = oneOf [ bool int float str ] // {
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description = "scalar types";
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};
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libConfig = oneOf [ scalar (listOf libConfig) (attrsOf libConfig) ] // {
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description = "libconfig type";
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};
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topLevel = attrsOf libConfig // {
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description = ''
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libconfig configuration. The format consists of an attributes
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set (called a group) of settings. Each setting can be a scalar type
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(boolean, integer, floating point number or string), a list of
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scalars or a group itself
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'';
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};
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in mkOption {
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type = topLevel;
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default = { };
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example = literalExpression ''
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blur =
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{ method = "gaussian";
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size = 10;
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deviation = 5.0;
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};
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'';
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description = ''
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Picom settings. Use this option to configure Picom settings not exposed
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in a NixOS option or to bypass one. For the available options see the
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CONFIGURATION FILES section at <literal>picom(1)</literal>.
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'';
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};
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};
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config = mkIf cfg.enable {
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services.picom.settings = mkDefaultAttrs {
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# fading
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fading = cfg.fade;
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fade-delta = cfg.fadeDelta;
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fade-in-step = elemAt cfg.fadeSteps 0;
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fade-out-step = elemAt cfg.fadeSteps 1;
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fade-exclude = cfg.fadeExclude;
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# shadows
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shadow = cfg.shadow;
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shadow-offset-x = elemAt cfg.shadowOffsets 0;
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shadow-offset-y = elemAt cfg.shadowOffsets 1;
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shadow-opacity = cfg.shadowOpacity;
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shadow-exclude = cfg.shadowExclude;
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# opacity
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active-opacity = cfg.activeOpacity;
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inactive-opacity = cfg.inactiveOpacity;
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wintypes = cfg.wintypes;
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opacity-rule = cfg.opacityRules;
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# other options
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backend = cfg.backend;
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vsync = cfg.vSync;
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};
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home.packages = [ cfg.package ];
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xdg.configFile."picom/picom.conf".text = configFile;
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systemd.user.services.picom = {
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Unit = {
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Description = "Picom X11 compositor";
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After = [ "graphical-session-pre.target" ];
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PartOf = [ "graphical-session.target" ];
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};
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Install = { WantedBy = [ "graphical-session.target" ]; };
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Service = {
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ExecStart = concatStringsSep " " ([
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"${cfg.package}/bin/picom"
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"--config ${config.xdg.configFile."picom/picom.conf".source}"
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] ++ cfg.extraArgs);
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Restart = "always";
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RestartSec = 3;
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};
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};
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};
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meta.maintainers = with lib.maintainers; [ thiagokokada ];
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}
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