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nixpkgs/nixos/modules/config/fonts/fonts.nix
2021-10-04 12:47:20 +02:00

87 lines
2.4 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
# A scalable variant of the X11 "core" cursor
#
# If not running a fancy desktop environment, the cursor is likely set to
# the default `cursor.pcf` bitmap font. This is 17px wide, so it's very
# small and almost invisible on 4K displays.
fontcursormisc_hidpi = pkgs.xorg.fontxfree86type1.overrideAttrs (old:
let
# The scaling constant is 230/96: the scalable `left_ptr` glyph at
# about 23 points is rendered as 17px, on a 96dpi display.
# Note: the XLFD font size is in decipoints.
size = 2.39583 * config.services.xserver.dpi;
sizeString = builtins.head (builtins.split "\\." (toString size));
in
{
postInstall = ''
alias='cursor -xfree86-cursor-medium-r-normal--0-${sizeString}-0-0-p-0-adobe-fontspecific'
echo "$alias" > $out/lib/X11/fonts/Type1/fonts.alias
'';
});
hasHidpi =
config.hardware.video.hidpi.enable &&
config.services.xserver.dpi != null;
defaultFonts =
[ pkgs.dejavu_fonts
pkgs.freefont_ttf
pkgs.gyre-fonts # TrueType substitutes for standard PostScript fonts
pkgs.liberation_ttf
pkgs.unifont
pkgs.noto-fonts-emoji
];
defaultXFonts =
[ (if hasHidpi then fontcursormisc_hidpi else pkgs.xorg.fontcursormisc)
pkgs.xorg.fontmiscmisc
] ++ optionals (config.nixpkgs.config.allowUnfree or false)
[ # these are unfree, and will make usage with xserver fail
pkgs.xorg.fontbhlucidatypewriter100dpi
pkgs.xorg.fontbhlucidatypewriter75dpi
pkgs.xorg.fontbh100dpi
];
in
{
imports = [
(mkRemovedOptionModule [ "fonts" "enableCoreFonts" ] "Use fonts.fonts = [ pkgs.corefonts ]; instead.")
];
options = {
fonts = {
# TODO: find another name for it.
fonts = mkOption {
type = types.listOf types.path;
default = [];
example = literalExpression "[ pkgs.dejavu_fonts ]";
description = "List of primary font paths.";
};
enableDefaultFonts = mkOption {
type = types.bool;
default = false;
description = ''
Enable a basic set of fonts providing several font styles
and families and reasonable coverage of Unicode.
'';
};
};
};
config = mkMerge [
{ fonts.fonts = mkIf config.fonts.enableDefaultFonts defaultFonts; }
{ fonts.fonts = mkIf config.services.xserver.enable defaultXFonts; }
];
}