71a8dbb956
(originally from f9415cb621)
feh is used to set background image for desktop managers that do not
support it directly, however there is no need to include it in PATH.
Fixes #17450.
114 lines
4.1 KiB
Nix
114 lines
4.1 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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xcfg = config.services.xserver;
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cfg = xcfg.desktopManager;
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# If desktop manager `d' isn't capable of setting a background and
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# the xserver is enabled, `feh' or `xsetroot' are used as a fallback.
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needBGCond = d: ! (d ? bgSupport && d.bgSupport) && xcfg.enable;
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in
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{
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# Note: the order in which desktop manager modules are imported here
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# determines the default: later modules (if enabled) are preferred.
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# E.g., if Plasma 5 is enabled, it supersedes xterm.
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imports = [
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./none.nix ./xterm.nix ./xfce.nix ./plasma5.nix ./lumina.nix
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./lxqt.nix ./enlightenment.nix ./gnome3.nix ./kodi.nix ./maxx.nix
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./mate.nix
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];
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options = {
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services.xserver.desktopManager = {
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wallpaper = {
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mode = mkOption {
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type = types.enum [ "center" "fill" "max" "scale" "tile" ];
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default = "scale";
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example = "fill";
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description = ''
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The file <filename>~/.background-image</filename> is used as a background image.
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This option specifies the placement of this image onto your desktop.
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Possible values:
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<literal>center</literal>: Center the image on the background. If it is too small, it will be surrounded by a black border.
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<literal>fill</literal>: Like <literal>scale</literal>, but preserves aspect ratio by zooming the image until it fits. Either a horizontal or a vertical part of the image will be cut off.
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<literal>max</literal>: Like <literal>fill</literal>, but scale the image to the maximum size that fits the screen with black borders on one side.
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<literal>scale</literal>: Fit the file into the background without repeating it, cutting off stuff or using borders. But the aspect ratio is not preserved either.
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<literal>tile</literal>: Tile (repeat) the image in case it is too small for the screen.
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'';
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};
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combineScreens = mkOption {
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type = types.bool;
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default = false;
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description = ''
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When set to <literal>true</literal> the wallpaper will stretch across all screens.
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When set to <literal>false</literal> the wallpaper is duplicated to all screens.
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'';
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};
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};
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session = mkOption {
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internal = true;
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default = [];
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example = singleton
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{ name = "kde";
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bgSupport = true;
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start = "...";
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};
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description = ''
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Internal option used to add some common line to desktop manager
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scripts before forwarding the value to the
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<varname>displayManager</varname>.
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'';
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apply = list: {
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list = map (d: d // {
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manage = "desktop";
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start = d.start
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+ optionalString (needBGCond d) ''
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if [ -e $HOME/.background-image ]; then
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${pkgs.feh}/bin/feh --bg-${cfg.wallpaper.mode} ${optionalString cfg.wallpaper.combineScreens "--no-xinerama"} $HOME/.background-image
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else
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# Use a solid black background as fallback
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${pkgs.xorg.xsetroot}/bin/xsetroot -solid black
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fi
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'';
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}) list;
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needBGPackages = [] != filter needBGCond list;
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};
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};
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default = mkOption {
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type = types.str;
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default = "none";
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example = "plasma5";
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description = "Default desktop manager loaded if none have been chosen.";
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apply = defaultDM:
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if defaultDM == "none" && cfg.session.list != [] then
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(head cfg.session.list).name
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else if any (w: w.name == defaultDM) cfg.session.list then
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defaultDM
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else
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throw ''
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Default desktop manager (${defaultDM}) not found.
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Probably you want to change
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services.xserver.desktopManager.default = "${defaultDM}";
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to one of
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${concatMapStringsSep "\n " (w: "services.xserver.desktopManager.default = \"${w.name}\";") cfg.session.list}
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'';
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};
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};
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};
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config.services.xserver.displayManager.session = cfg.session.list;
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}
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