nwg-panel: make configurable through nix

hosts/common/programs/nwg-panel/config

@@ -6,7 +6,7 @@
     "position": "top",
     "controls": "right",
     "width": "auto",
-    "height": 40,
+    "height": @height@,
     "homogeneous": true,
     "margin-top": 0,
     "margin-bottom": 0,
@@ -84,8 +84,8 @@
       "image-size": 16,
       "workspaces-spacing": 0,
       "task-padding": 0,
-      "show-app-icon": true,
-      "show-app-name": true,
+      "show-app-icon": @windowIcon@,
+      "show-app-name": @windowTitle@,
       "show-layout": false,
       "workspace-buttons": false,
       "all-workspaces": true,
@@ -109,9 +109,9 @@
       ],
       "custom-labels": [],
       "focused-labels": [],
-      "show-icon": true,
+      "show-icon": @windowIcon@,
       "image-size": 16,
-      "show-name": true,
+      "show-name": @windowTitle@,
       "name-length": 40,
       "mark-autotiling": true,
       "mark-content": false,
@@ -144,7 +144,7 @@
     "playerctl": {
       "buttons-position": "left",
       "icon-size": 16,
-      "chars": 30,
+      "chars": @playerctlChars@,
       "scroll": false,
       "button-css-name": "playerctl-button",
       "label-css-name": "playerctl-label",

hosts/common/programs/nwg-panel/default.nix

@@ -4,11 +4,56 @@
 #
 # interactively configure with: `nwg-panel-config`
 # ^ note that this may interfere with the `nwg-panel` service
-{ ... }:
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.sane.programs.nwg-panel;
+  mkEnableOption' = default: description: lib.mkOption {
+    type = lib.types.bool;
+    inherit default description;
+  };
+in
 {
   sane.programs.nwg-panel = {
-    fs.".config/nwg-panel/config".symlink.target = ./config;
-    fs.".config/nwg-panel/style.css".symlink.target = ./style.css;
+    configOption = with lib; mkOption {
+      default = {};
+      type = types.submodule {
+        options = {
+          fontSize = mkOption {
+            type = types.int;
+            default = 16;
+          };
+          height = mkOption {
+            type = types.int;
+            default = 40;
+            description = ''
+              height of the top bar in px.
+            '';
+          };
+          mediaTitle = mkEnableOption' true "display title of current song/media";
+          mediaPrevNext = mkEnableOption' true "display prev/next button in media";
+          windowIcon = mkEnableOption' true "display icon of active window";
+          windowTitle = mkEnableOption' true "display title of active window";
+        };
+      };
+    };
+
+    packageUnwrapped = pkgs.nwg-panel.overrideAttrs (base: {
+      patches = (base.patches or []) ++ lib.optionals (!cfg.config.mediaPrevNext) [
+        ./playerctl-no-prev-next.diff
+      ];
+    });
+
+    # fs.".config/nwg-panel/config".symlink.target = ./config;
+    # fs.".config/nwg-panel/style.css".symlink.target = ./style.css;
+    fs.".config/nwg-panel/config".symlink.target = pkgs.substituteAll {
+      src = ./config;
+      inherit (cfg.config) height windowIcon windowTitle;
+      playerctlChars = if cfg.config.mediaTitle then 30 else 0;
+    };
+    fs.".config/nwg-panel/style.css".symlink.target = pkgs.substituteAll {
+      src = ./style.css;
+      inherit (cfg.config) fontSize;
+    };
 
     services.nwg-panel = {
       description = "nwg-panel status/topbar for wayland";

hosts/common/programs/nwg-panel/playerctl-no-prev-next.diff

@@ -0,0 +1,36 @@
+diff --git a/nwg_panel/modules/playerctl.py b/nwg_panel/modules/playerctl.py
+index 9b53b4b..c4d96ae 100644
+--- a/nwg_panel/modules/playerctl.py
++++ b/nwg_panel/modules/playerctl.py
+@@ -180,15 +180,6 @@ class Playerctl(Gtk.EventBox):
+         if self.settings["angle"] != 0.0:
+             button_box.set_orientation(Gtk.Orientation.VERTICAL)
+ 
+-        img = Gtk.Image()
+-        update_image(img, "media-skip-backward-symbolic", self.settings["icon-size"], icons_path=self.icons_path)
+-        btn = Gtk.Button()
+-        btn.set_image(img)
+-        if self.settings["button-css-name"]:
+-            btn.set_property("name", self.settings["button-css-name"])
+-        btn.connect("clicked", self.launch, self.PlayerOps.PREVIOUS)
+-        button_box.pack_start(btn, False, False, 1)
+-
+         self.play_pause_btn = Gtk.Button()
+         if self.settings["button-css-name"]:
+             self.play_pause_btn.set_property("name", self.settings["button-css-name"])
+@@ -198,15 +189,6 @@ class Playerctl(Gtk.EventBox):
+         self.play_pause_btn.connect("clicked", self.launch, self.PlayerOps.PLAY_PAUSE)
+         button_box.pack_start(self.play_pause_btn, False, False, 1)
+ 
+-        img = Gtk.Image()
+-        update_image(img, "media-skip-forward-symbolic", self.settings["icon-size"], icons_path=self.icons_path)
+-        btn = Gtk.Button()
+-        btn.set_image(img)
+-        if self.settings["button-css-name"]:
+-            btn.set_property("name", self.settings["button-css-name"])
+-        btn.connect("clicked", self.launch, self.PlayerOps.NEXT)
+-        button_box.pack_start(btn, False, False, 1)
+-
+         self.label = AutoScrollLabel(self.settings["scroll"],
+                                      self.settings["chars"],
+                                      self.settings["interval"])

hosts/common/programs/nwg-panel/style.css

@@ -17,7 +17,7 @@
 
 
 * {
-  font-size: 16px;
+  font-size: @fontSize@px;
 }
 
 button {

hosts/modules/roles/handheld.nix

@@ -56,6 +56,14 @@
       modules.windowTitle = false;
       # TODO: show modem state
     };
+    sane.programs.nwg-panel.config = {
+      fontSize = 14;
+      height = 26;
+      windowIcon = false;
+      windowTitle = false;
+      mediaPrevNext = false;
+      mediaTitle = false;
+    };
 
     sane.programs.zsh.config.showDeadlines = false;  # unlikely to act on them when in shell
   };