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home-manager/modules/programs/feh.nix
2020-02-02 01:07:28 +01:00

70 lines
2 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.programs.feh;
disableBinding = func: key: func;
enableBinding = func: key: "${func} ${toString key}";
in {
options.programs.feh = {
enable = mkEnableOption "feh - a fast and light image viewer";
buttons = mkOption {
default = { };
type = with types; attrsOf (nullOr (either str int));
example = {
zoom_in = 4;
zoom_out = "C-4";
};
description = ''
Override feh's default mouse button mapping. If you want to disable an
action, set its value to null.
See <link xlink:href="https://man.finalrewind.org/1/feh/#x425554544f4e53"/> for
default bindings and available commands.
'';
};
keybindings = mkOption {
default = { };
type = types.attrsOf (types.nullOr types.str);
example = {
zoom_in = "plus";
zoom_out = "minus";
};
description = ''
Override feh's default keybindings. If you want to disable a keybinding
set its value to null.
See <link xlink:href="https://man.finalrewind.org/1/feh/#x4b455953"/> for
default bindings and available commands.
'';
};
};
config = mkIf cfg.enable {
assertions = [{
assertion = ((filterAttrs (n: v: v == "") cfg.keybindings) == { });
message =
"To disable a keybinding, use `null` instead of an empty string.";
}];
home.packages = [ pkgs.feh ];
xdg.configFile."feh/buttons".text = ''
${concatStringsSep "\n" (mapAttrsToList disableBinding
(filterAttrs (n: v: v == null) cfg.buttons))}
${concatStringsSep "\n" (mapAttrsToList enableBinding
(filterAttrs (n: v: v != null) cfg.buttons))}
'';
xdg.configFile."feh/keys".text = ''
${concatStringsSep "\n" (mapAttrsToList disableBinding
(filterAttrs (n: v: v == null) cfg.keybindings))}
${concatStringsSep "\n" (mapAttrsToList enableBinding
(filterAttrs (n: v: v != null) cfg.keybindings))}
'';
};
}