82 lines
2.3 KiB
Nix
82 lines
2.3 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.programs.feh;
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bindingsOf = t: with types; attrsOf (nullOr (either t (listOf t)));
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renderBindings = bindings:
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let
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enabled = filterAttrs (n: v: v != null) bindings;
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disabled = filterAttrs (n: v: v == null) bindings;
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render = mapAttrsToList renderBinding;
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in concatStringsSep "\n" (render disabled ++ render enabled);
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renderBinding = func: key:
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if key == null then
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func
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else if isList key then
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concatStringsSep " " ([ func ] ++ map toString key)
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else
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"${func} ${toString key}";
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in {
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options.programs.feh = {
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enable = mkEnableOption "feh - a fast and light image viewer";
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buttons = mkOption {
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default = { };
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type = with types; bindingsOf (either str int);
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example = {
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zoom_in = 4;
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zoom_out = "C-4";
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prev_img = [ 3 "C-3" ];
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};
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description = ''
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Override feh's default mouse button mapping. If you want to disable an
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action, set its value to null. If you want to bind multiple buttons to
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an action, set its value to a list.
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See <link xlink:href="https://man.finalrewind.org/1/feh/#x425554544f4e53"/> for
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default bindings and available commands.
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'';
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};
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keybindings = mkOption {
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default = { };
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type = bindingsOf types.str;
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example = {
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zoom_in = "plus";
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zoom_out = "minus";
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prev_img = [ "h" "Left" ];
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};
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description = ''
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Override feh's default keybindings. If you want to disable a keybinding
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set its value to null. If you want to bind multiple keys to an action,
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set its value to a list.
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See <link xlink:href="https://man.finalrewind.org/1/feh/#x4b455953"/> for
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default bindings and available commands.
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'';
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};
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};
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config = mkIf cfg.enable {
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assertions = [{
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assertion = ((filterAttrs (n: v: v == "") cfg.keybindings) == { });
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message =
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"To disable a keybinding, use `null` instead of an empty string.";
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}];
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home.packages = [ pkgs.feh ];
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xdg.configFile."feh/buttons" =
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mkIf (cfg.buttons != { }) { text = renderBindings cfg.buttons + "\n"; };
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xdg.configFile."feh/keys" = mkIf (cfg.keybindings != { }) {
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text = renderBindings cfg.keybindings + "\n";
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};
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};
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}
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