pyrox.dev
1{ config, lib, pkgs, ... }:
2
3with lib;
4
5let
6
7 xcfg = config.services.xserver;
8 cfg = xcfg.desktopManager;
9
10 # If desktop manager `d' isn't capable of setting a background and
11 # the xserver is enabled, `feh' or `xsetroot' are used as a fallback.
12 needBGCond = d: ! (d ? bgSupport && d.bgSupport) && xcfg.enable;
13
14in
15
16{
17 # Note: the order in which desktop manager modules are imported here
18 # determines the default: later modules (if enabled) are preferred.
19 # E.g., if Plasma 5 is enabled, it supersedes xterm.
20 imports = [
21 ./none.nix ./xterm.nix ./xfce.nix ./plasma5.nix ./lumina.nix
22 ./lxqt.nix ./enlightenment.nix ./gnome3.nix ./kodi.nix ./maxx.nix
23 ./mate.nix
24 ];
25
26 options = {
27
28 services.xserver.desktopManager = {
29
30 wallpaper = {
31 mode = mkOption {
32 type = types.enum [ "center" "fill" "max" "scale" "tile" ];
33 default = "scale";
34 example = "fill";
35 description = ''
36 The file <filename>~/.background-image</filename> is used as a background image.
37 This option specifies the placement of this image onto your desktop.
38
39 Possible values:
40 <literal>center</literal>: Center the image on the background. If it is too small, it will be surrounded by a black border.
41 <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.
42 <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.
43 <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.
44 <literal>tile</literal>: Tile (repeat) the image in case it is too small for the screen.
45 '';
46 };
47
48 combineScreens = mkOption {
49 type = types.bool;
50 default = false;
51 description = ''
52 When set to <literal>true</literal> the wallpaper will stretch across all screens.
53 When set to <literal>false</literal> the wallpaper is duplicated to all screens.
54 '';
55 };
56 };
57
58 session = mkOption {
59 internal = true;
60 default = [];
61 example = singleton
62 { name = "kde";
63 bgSupport = true;
64 start = "...";
65 };
66 description = ''
67 Internal option used to add some common line to desktop manager
68 scripts before forwarding the value to the
69 <varname>displayManager</varname>.
70 '';
71 apply = list: {
72 list = map (d: d // {
73 manage = "desktop";
74 start = d.start
75 + optionalString (needBGCond d) ''
76 if [ -e $HOME/.background-image ]; then
77 ${pkgs.feh}/bin/feh --bg-${cfg.wallpaper.mode} ${optionalString cfg.wallpaper.combineScreens "--no-xinerama"} $HOME/.background-image
78 else
79 # Use a solid black background as fallback
80 ${pkgs.xorg.xsetroot}/bin/xsetroot -solid black
81 fi
82 '';
83 }) list;
84 needBGPackages = [] != filter needBGCond list;
85 };
86 };
87
88 default = mkOption {
89 type = types.str;
90 default = "";
91 example = "none";
92 description = "Default desktop manager loaded if none have been chosen.";
93 apply = defaultDM:
94 if defaultDM == "" && cfg.session.list != [] then
95 (head cfg.session.list).name
96 else if any (w: w.name == defaultDM) cfg.session.list then
97 defaultDM
98 else
99 builtins.trace ''
100 Default desktop manager (${defaultDM}) not found at evaluation time.
101 These are the known valid session names:
102 ${concatMapStringsSep "\n " (w: "services.xserver.desktopManager.default = \"${w.name}\";") cfg.session.list}
103 It's also possible the default can be found in one of these packages:
104 ${concatMapStringsSep "\n " (p: p.name) config.services.xserver.displayManager.extraSessionFilePackages}
105 '' defaultDM;
106 };
107
108 };
109
110 };
111
112 config.services.xserver.displayManager.session = cfg.session.list;
113}