85 lines
		
	
	
		
			2.2 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
			
		
		
	
	
			85 lines
		
	
	
		
			2.2 KiB
		
	
	
	
		
			Nix
		
	
	
	
	
	
{ config, lib, pkgs, ... }:
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with lib;
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{
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  ###### interface
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  options = {
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    hardware.trackpoint = {
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      enable = mkOption {
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        default = false;
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        type = types.bool;
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        description = ''
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          Enable sensitivity and speed configuration for trackpoints.
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        '';
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      };
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      sensitivity = mkOption {
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        default = 128;
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        example = 255;
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        type = types.int;
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        description = ''
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          Configure the trackpoint sensitivity. By default, the kernel
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          configures 128.
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        '';
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      };
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      speed = mkOption {
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        default = 97;
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        example = 255;
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        type = types.int;
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        description = ''
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          Configure the trackpoint sensitivity. By default, the kernel
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          configures 97.
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        '';
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      };
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      emulateWheel = mkOption {
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        default = false;
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        type = types.bool;
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        description = ''
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          Enable scrolling while holding the middle mouse button.
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        '';
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      };
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    };
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  };
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  ###### implementation
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  config = mkMerge [
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    (mkIf config.hardware.trackpoint.enable {
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      services.udev.extraRules =
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      ''
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        ACTION=="add|change", SUBSYSTEM=="input", ATTR{name}=="TPPS/2 IBM TrackPoint", ATTR{device/speed}="${toString config.hardware.trackpoint.speed}", ATTR{device/sensitivity}="${toString config.hardware.trackpoint.sensitivity}"
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      '';
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      system.activationScripts.trackpoint =
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        ''
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          ${config.systemd.package}/bin/udevadm trigger --attr-match=name="TPPS/2 IBM TrackPoint"
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        '';
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    })
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    (mkIf config.hardware.trackpoint.emulateWheel {
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      services.xserver.config =
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        ''
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          Section "InputClass"
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            Identifier "Trackpoint Wheel Emulation"
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            MatchProduct "TPPS/2 IBM TrackPoint|DualPoint Stick|Synaptics Inc. Composite TouchPad / TrackPoint|ThinkPad USB Keyboard with TrackPoint|USB Trackpoint pointing device|Composite TouchPad / TrackPoint"
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            MatchDevicePath "/dev/input/event*"
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            Option "EmulateWheel" "true"
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            Option "EmulateWheelButton" "2"
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            Option "Emulate3Buttons" "false"
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            Option "XAxisMapping" "6 7"
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            Option "YAxisMapping" "4 5"
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            EndSection
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        '';
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    })
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  ];
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}
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