dwl/tags: add hide-vacant option

include/modules/dwl/tags.hpp

@@ -28,6 +28,7 @@ class Tags : public waybar::AModule {
   const waybar::Bar &bar_;
   Gtk::Box box_;
   std::vector<Gtk::Button> buttons_;
+  bool hide_vacant_;
   struct zdwl_ipc_output_v2 *output_status_;
 };
 

man/waybar-dwl-tags.5.scd

@@ -21,6 +21,11 @@ Addressed by *dwl/tags*
 	typeof: array ++
 	The label to display for each tag.
 
+*hide-vacant*: ++
+	typeof: bool ++
+	default: false ++
+	If set to true, tags without clients and that are not active will be hidden.
+
 *disable-click*: ++
 	typeof: bool ++
 	default: false ++

src/modules/dwl/tags.cpp

@@ -94,7 +94,11 @@ Tags::Tags(const std::string &id, const waybar::Bar &bar, const Json::Value &con
       seat_{nullptr},
       bar_(bar),
       box_{bar.orientation, 0},
+      hide_vacant_(false),
       output_status_{nullptr} {
+  if (config_["hide-vacant"].asBool()) {
+    hide_vacant_ = config_["hide-vacant"].asBool();
+  }
   struct wl_display *display = Client::inst()->wl_display;
   struct wl_registry *registry = wl_display_get_registry(display);
 
@@ -198,6 +202,12 @@ void Tags::handle_view_tags(uint32_t tag, uint32_t state, uint32_t clients, uint
   } else {
     button.get_style_context()->remove_class("urgent");
   }
+
+  if (hide_vacant_ && !clients && !(state & TAG_ACTIVE)) {
+    button.set_visible(false);
+  } else {
+    button.set_visible(true);
+  }
 }
 
 } /* namespace waybar::modules::dwl */