nixos-config/nixos/system/desktop/home-manager/i3.nix

{ config, lib, pkgs, ... }:

let
  cfg = config.home-manager.users.mainUser.xsession.windowManager.i3;
  colorTheme =
    let
      theme = (import ../../../library/colorThemes.nix).solarized.light.hex;
    in
    theme // {
      foreground = theme.base3;
      background = theme.base03;
    };

  # switch to named workspaces
  i3-wk-switch = pkgs.i3-wk-switch.overrideAttrs (old: {
    src = pkgs.fetchFromGitHub {
      owner = "tmfink";
      repo = "i3-wk-switch";
      rev = "5f43bb8cbe7938eff476fc534b61c8fb6a700c8f";
      sha256 = "sha256-DOBPI/wO+S8a6EzWJeVGODXeSixFl7SHTtHAq5DG8GU=";
    };
  });

  backgroundCommand = pkgs.writers.writeDash "background" ''
    ${pkgs.xorg.xrandr}/bin/xrandr | grep " connected" | \
      ${pkgs.gnused}/bin/sed -E "s/primary //" | \
      ${pkgs.coreutils-full}/bin/cut -d' ' -f 3 | \
      ${pkgs.gnused}/bin/sed -E 's/\+.*$//g' | \
      ${pkgs.coreutils-full}/bin/sort -r | \
      ${pkgs.coreutils-full}/bin/head -n 1 | \
      ${pkgs.gawk}/bin/awk -F 'x' '{print "--width="$1" --height="$2}' | \
      ${pkgs.findutils}/bin/xargs \
          ${pkgs.polygon-art.polygon-art}/bin/rings \
        /dev/shm/background.png && \
        ${pkgs.feh}/bin/feh --bg-scale /dev/shm/background.png
  '';

in
{
  home-manager.users.mainUser = {

    programs.i3status-rust = {
      enable = true;
      bars = {
        my = {
          icons = "awesome5";
          theme = "solarized-light";
          # https://github.com/greshake/i3status-rust/blob/v0.22.0/doc/blocks.md
          blocks = [
            {
              block = "cpu";
              interval = 1;
            }
            {
              block = "memory";
              display_type = "memory";
              format_mem = "{mem_used_percents}";
              format_swap = "{swap_used_percents}";
            }
            {
              block = "load";
              interval = 1;
              format = "{1m}";
            }
            {
              block = "battery";
              interval = 10;
              format = "{percentage} {time}";
            }
            { block = "uptime"; }
            {
              block = "time";
              interval = 60;
              format = "%Y-%m-%d %R";
            }
          ];
        };
      };

    };

    xsession.windowManager.i3 = {
      enable = true;
      extraConfig = ''
        default_border pixel
      '';
      config = {
        modifier = "Mod4";
        startup =
          let
            height = config.configuration.desktop.height;
            width = config.configuration.desktop.width;
          in
          [
            { command = "${pkgs.albert}/bin/albert"; always = true; }
            #{
            #  command = "${pkgs.polygon-art.polygon-art}/bin/rings --height ${toString height} --width ${toString width} /dev/shm/background.png && ${pkgs.feh}/bin/feh --bg-scale /dev/shm/background.png";
            #  always = true;
            #}
            { command = toString backgroundCommand; always = true; }
            #{ command = "${pkgs.flameshot}/bin/flameshot"; always = true; }
            # { command = "systemctl --user restart polybar"; always = true; notification = false; }
          ];
        fonts = {
          names = [ "Terminus" ];
          size = 9.0;
        };
        bars =
          with colorTheme;
          let
            selected = blue;
          in
          [{
            mode = "hide";
            hiddenState = "hide";
            position = "top";
            workspaceButtons = true;
            workspaceNumbers = true;
            statusCommand = "${pkgs.i3status-rust}/bin/i3status-rs ${config.users.users.mainUser.home}/.config/i3status-rust/config-my.toml";
            #fonts = [ "Terminus" ];
            fonts = {
              names = [ "Terminus" ];
              size = 9.0;
            };
            trayOutput = "primary";
            colors = {
              background = background;
              statusline = background;
              separator = background;
              focusedWorkspace = {
                border = selected;
                background = base02;
                text = foreground;
              };
              activeWorkspace = {
                border = background;
                background = base02;
                text = foreground;
              };
              inactiveWorkspace = {
                border = background;
                background = base02;
                text = foreground;
              };
              urgentWorkspace = {
                border = red;
                background = base02;
                text = foreground;
              };
              bindingMode = {
                border = red;
                background = red;
                text = background;
              };
            };
          }];
        colors = with colorTheme; {
          background = background;
          focused = {
            background = blue;
            border = blue;
            childBorder = blue;
            indicator = blue;
            text = foreground;
          };
          focusedInactive = {
            background = base01;
            border = base01;
            childBorder = base02;
            indicator = base02;
            text = foreground;
          };
          unfocused = {
            background = base02;
            border = base02;
            childBorder = base02;
            indicator = base02;
            text = foreground;
          };
          urgent = {
            background = orange;
            border = orange;
            childBorder = background;
            indicator = background;
            text = foreground;
          };
        };
        keybindings = {
          "Print" = "exec ${pkgs.flameshot}/bin/flameshot gui -c -p /share/";
          "${cfg.config.modifier}+Return" = "exec ${cfg.config.terminal}";
          "${cfg.config.modifier}+Shift+q" = "exit";
          "${cfg.config.modifier}+q" = "kill";

          "${cfg.config.modifier}+Left" = "focus left";
          "${cfg.config.modifier}+Down" = "focus down";
          "${cfg.config.modifier}+Up" = "focus up";
          "${cfg.config.modifier}+Right" = "focus right";
          "${cfg.config.modifier}+j" = "focus next";
          "${cfg.config.modifier}+k" = "focus prev";

          "${cfg.config.modifier}+Shift+Left" = "move left";
          "${cfg.config.modifier}+Shift+Down" = "move down";
          "${cfg.config.modifier}+Shift+Up" = "move up";
          "${cfg.config.modifier}+Shift+Right" = "move right";

          "${cfg.config.modifier}+h" = "split h";
          "${cfg.config.modifier}+v" = "split v";
          "${cfg.config.modifier}+f" = "fullscreen toggle";

          "${cfg.config.modifier}+s" = "layout stacking";
          "${cfg.config.modifier}+w" = "layout tabbed";
          "${cfg.config.modifier}+e" = "layout toggle split";

          "${cfg.config.modifier}+t" = "floating toggle";
          #"${cfg.config.modifier}+space" = "focus mode_toggle";

          "${cfg.config.modifier}+b" = "exec ${backgroundCommand}";

          "${cfg.config.modifier}+p" = "focus parent";

          "${cfg.config.modifier}+Shift+minus" = "move scratchpad";
          "${cfg.config.modifier}+minus" = "scratchpad show";

          "${cfg.config.modifier}+1" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 1";
          "${cfg.config.modifier}+2" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 2";
          "${cfg.config.modifier}+3" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 3";
          "${cfg.config.modifier}+4" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 4";
          "${cfg.config.modifier}+5" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 5";
          "${cfg.config.modifier}+6" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 6";
          "${cfg.config.modifier}+7" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 7";
          "${cfg.config.modifier}+8" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 8";
          "${cfg.config.modifier}+9" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 9";
          "${cfg.config.modifier}+0" = "exec --no-startup-id ${i3-wk-switch}/bin/i3-wk-switch 10";

          "${cfg.config.modifier}+Shift+1" = "move container to workspace number 1";
          "${cfg.config.modifier}+Shift+2" = "move container to workspace number 2";
          "${cfg.config.modifier}+Shift+3" = "move container to workspace number 3";
          "${cfg.config.modifier}+Shift+4" = "move container to workspace number 4";
          "${cfg.config.modifier}+Shift+5" = "move container to workspace number 5";
          "${cfg.config.modifier}+Shift+6" = "move container to workspace number 6";
          "${cfg.config.modifier}+Shift+7" = "move container to workspace number 7";
          "${cfg.config.modifier}+Shift+8" = "move container to workspace number 8";
          "${cfg.config.modifier}+Shift+9" = "move container to workspace number 9";
          "${cfg.config.modifier}+Shift+0" = "move container to workspace number 10";

          "${cfg.config.modifier}+Escape" = "workspace back_and_forth";

          # rename workspace
          "${cfg.config.modifier}+n" = ''
            exec i3-input -F 'rename workspace to "%s"' -P 'New name for this workspace: '
          '';

          "${cfg.config.modifier}+grave" =
            let
              script = pkgs.writers.writeBash "select-workspace" ''
                set -e
                set -o pipefail
                ${pkgs.i3}/bin/i3-msg -t get_workspaces | \
                ${pkgs.jq}/bin/jq --raw-output '.[] | .name' | \
                ${pkgs.rofi}/bin/rofi -dmenu -p 'Select Workspace' | \
                while read line
                do
                  ${i3-wk-switch}/bin/i3-wk-switch "$line"
                done
              '';
            in
            "exec ${script}";

          "${cfg.config.modifier}+Shift+c" = "reload";
          "${cfg.config.modifier}+Shift+r" = "restart";
          "${cfg.config.modifier}+Shift+e" = "exec i3-nagbar -t warning -m 'Do you want to exit i3?' -b 'Yes' 'i3-msg exit'";

          "${cfg.config.modifier}+r" = "mode resize";

          # multiple monitors
          # autorandr --save docked   # to save setup
          # autorandr --save undocked # to save setup
          # autorandr --change        # automatically detects the setup
          "${cfg.config.modifier}+BackSpace" =
            let
              xmodmapConfig = pkgs.writeText "xmodmap" ''
                !
                ! Swap Caps_Lock and Control_L
                !

                ! replace capslock keys with Escape Keys
                ! remove Lock = Caps_Lock
                clear Lock
                add Lock = Scroll_Lock

                keysym Caps_Lock = Escape

                ! Set Right function Key to Windows-key
                keycode 135 = Super_R NoSymbol Super_R NoSymbol Super_R

                ! Map umlauts to RIGHT ALT + <key>
                keycode 108 = Mode_switch
                keysym e = e E EuroSign
                keysym c = c C cent
                keysym a = a A adiaeresis Adiaeresis
                keysym o = o O odiaeresis Odiaeresis
                keysym u = u U udiaeresis Udiaeresis
                keysym s = s S ssharp
              '';
              script = pkgs.writers.writeBash "autorandr" ''
                ${pkgs.autorandr}/bin/autorandr --change
                ${pkgs.xorg.xmodmap}/bin/xmodmap ${xmodmapConfig}
                ${backgroundCommand}
              '';
            in
            "exec ${toString script}";

          # like vimperator

          "${cfg.config.modifier}+a" = "exec ${pkgs.i3-easyfocus}/bin/i3-easyfocus";

        };
      };

    };

  };
}