29027fd1e1
Using pkgs.lib on the spine of module evaluation is problematic because the pkgs argument depends on the result of module evaluation. To prevent an infinite recursion, pkgs and some of the modules are evaluated twice, which is inefficient. Using ‘with lib’ prevents this problem.
142 lines
4.1 KiB
Nix
142 lines
4.1 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let cfg = config.services.xserver.synaptics;
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tapConfig = if cfg.tapButtons then enabledTapConfig else disabledTapConfig;
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enabledTapConfig = ''
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Option "MaxTapTime" "180"
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Option "MaxTapMove" "220"
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Option "TapButton1" "${builtins.elemAt cfg.buttonsMap 0}"
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Option "TapButton2" "${builtins.elemAt cfg.buttonsMap 1}"
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Option "TapButton3" "${builtins.elemAt cfg.buttonsMap 2}"
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'';
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disabledTapConfig = ''
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Option "MaxTapTime" "0"
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Option "MaxTapMove" "0"
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Option "TapButton1" "0"
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Option "TapButton2" "0"
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Option "TapButton3" "0"
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'';
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in {
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options = {
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services.xserver.synaptics = {
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enable = mkOption {
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default = false;
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example = true;
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description = "Whether to enable touchpad support.";
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};
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dev = mkOption {
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default = null;
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example = "/dev/input/event0";
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description =
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''
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Path for touchpad device. Set to null to apply to any
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auto-detected touchpad.
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'';
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};
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accelFactor = mkOption {
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default = "0.001";
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description = "Cursor acceleration (how fast speed increases from minSpeed to maxSpeed).";
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};
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minSpeed = mkOption {
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default = "0.6";
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description = "Cursor speed factor for precision finger motion.";
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};
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maxSpeed = mkOption {
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default = "1.0";
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description = "Cursor speed factor for highest-speed finger motion.";
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};
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twoFingerScroll = mkOption {
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default = false;
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description = "Whether to enable two-finger drag-scrolling.";
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};
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vertEdgeScroll = mkOption {
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default = ! cfg.twoFingerScroll;
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description = "Whether to enable vertical edge drag-scrolling.";
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};
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tapButtons = mkOption {
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default = true;
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example = false;
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description = "Whether to enable tap buttons.";
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};
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buttonsMap = mkOption {
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default = [1 2 3];
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example = [1 3 2];
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description = "Remap touchpad buttons.";
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apply = map toString;
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};
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palmDetect = mkOption {
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default = false;
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example = true;
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description = "Whether to enable palm detection (hardware support required)";
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};
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horizontalScroll = mkOption {
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default = true;
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example = false;
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description = "Whether to enable horizontal scrolling (on touchpad)";
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};
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additionalOptions = mkOption {
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default = "";
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example = ''
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Option "RTCornerButton" "2"
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Option "RBCornerButton" "3"
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'';
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description = ''
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Additional options for synaptics touchpad driver.
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'';
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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.xserver.modules = [ pkgs.xorg.xf86inputsynaptics ];
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environment.systemPackages = [ pkgs.xorg.xf86inputsynaptics ];
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services.xserver.config =
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''
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# Automatically enable the synaptics driver for all touchpads.
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Section "InputClass"
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Identifier "synaptics touchpad catchall"
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MatchIsTouchpad "on"
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${optionalString (cfg.dev != null) ''MatchDevicePath "${cfg.dev}"''}
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Driver "synaptics"
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Option "MinSpeed" "${cfg.minSpeed}"
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Option "MaxSpeed" "${cfg.maxSpeed}"
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Option "AccelFactor" "${cfg.accelFactor}"
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${optionalString cfg.tapButtons tapConfig}
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Option "ClickFinger1" "${builtins.elemAt cfg.buttonsMap 0}"
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Option "ClickFinger2" "${builtins.elemAt cfg.buttonsMap 1}"
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Option "ClickFinger3" "${builtins.elemAt cfg.buttonsMap 2}"
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Option "VertTwoFingerScroll" "${if cfg.twoFingerScroll then "1" else "0"}"
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Option "HorizTwoFingerScroll" "${if cfg.twoFingerScroll then "1" else "0"}"
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Option "VertEdgeScroll" "${if cfg.vertEdgeScroll then "1" else "0"}"
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${if cfg.palmDetect then ''Option "PalmDetect" "1"'' else ""}
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${if cfg.horizontalScroll then "" else ''Option "HorizScrollDelta" "0"''}
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${cfg.additionalOptions}
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EndSection
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'';
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};
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}
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