From ba23ef6487c09aa9b378510a7d2a667259181a6c Mon Sep 17 00:00:00 2001
From: Jakob Sjudin <jakob.sjudin@gmail.com>
Date: Fri, 20 Mar 2026 11:25:27 +0100
Subject: [PATCH 1/2] Add .empty css class to group if it is empty

---
 include/group.hpp |  1 +
 src/group.cpp     | 45 ++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 45 insertions(+), 1 deletion(-)

diff --git a/include/group.hpp b/include/group.hpp
index d5cbb289..e263a35a 100644
--- a/include/group.hpp
+++ b/include/group.hpp
@@ -26,6 +26,7 @@ class Group : public AModule {
   bool is_first_widget = true;
   bool is_drawer = false;
   bool click_to_reveal = false;
+  bool empty_if_drawer_empty = false;
   std::string add_class_to_drawer_children;
   bool handleMouseEnter(GdkEventCrossing* const& ev) override;
   bool handleMouseLeave(GdkEventCrossing* const& ev) override;
diff --git a/src/group.cpp b/src/group.cpp
index acd7bd42..6b38e220 100644
--- a/src/group.cpp
+++ b/src/group.cpp
@@ -30,6 +30,7 @@ Group::Group(const std::string& name, const std::string& id, const Json::Value&
       box{vertical ? Gtk::ORIENTATION_VERTICAL : Gtk::ORIENTATION_HORIZONTAL, 0},
       revealer_box{vertical ? Gtk::ORIENTATION_VERTICAL : Gtk::ORIENTATION_HORIZONTAL, 0} {
   box.set_name(name_);
+  box.get_style_context()->add_class("empty");
   if (!id.empty()) {
     box.get_style_context()->add_class(id);
   }
@@ -67,6 +68,9 @@ Group::Group(const std::string& name, const std::string& id, const Json::Value&
     const bool start_expanded =
         (drawer_config["start-expanded"].isBool() ? drawer_config["start-expanded"].asBool()
                                                   : false);
+    empty_if_drawer_empty = (drawer_config["empty-if-drawer-empty"].isBool()
+                                 ? drawer_config["empty-if-drawer-empty"].asBool()
+                                 : false);
 
     auto transition_type = getPreferredTransitionType(vertical);
 
@@ -129,7 +133,44 @@ bool Group::handleToggle(GdkEventButton* const& e) {
 }
 
 auto Group::update() -> void {
-  // noop
+  bool has_visible_child = false;
+  bool has_visible_drawer_child = false;
+
+  if (is_drawer) {
+    for (auto* rev_child : revealer_box.get_children()) {
+      if (rev_child->get_visible()) {
+        has_visible_drawer_child = true;
+        break;
+      }
+    }
+  }
+
+  if (is_drawer && empty_if_drawer_empty) {
+    has_visible_child = has_visible_drawer_child;
+  } else {
+    for (auto* child : box.get_children()) {
+      if (child == &revealer) {
+        if (has_visible_drawer_child) {
+          has_visible_child = true;
+          break;
+        }
+      } else if (child->get_visible()) {
+        has_visible_child = true;
+        break;
+      }
+    }
+  }
+
+  auto style = box.get_style_context();
+  if (has_visible_child) {
+    if (style->has_class("empty")) {
+      style->remove_class("empty");
+    }
+  } else {
+    if (!style->has_class("empty")) {
+      style->add_class("empty");
+    }
+  }
 }
 
 bool Group::handleScroll(GdkEventScroll* e) {
@@ -147,6 +188,8 @@ void Group::addWidget(Gtk::Widget& widget) {
   }
 
   is_first_widget = false;
+  widget.property_visible().signal_changed().connect(sigc::mem_fun(*this, &Group::update));
+  update();
 }
 
 Group::operator Gtk::Widget&() { return event_box_; }

From e07a2e91976c9265003aae6fa58b8049b221c381 Mon Sep 17 00:00:00 2001
From: Jakob Sjudin <jakob.sjudin@gmail.com>
Date: Fri, 20 Mar 2026 11:40:36 +0100
Subject: [PATCH 2/2] Update manpages

---
 man/waybar.5.scd.in | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/man/waybar.5.scd.in b/man/waybar.5.scd.in
index 8b923eef..e573d7d6 100644
--- a/man/waybar.5.scd.in
+++ b/man/waybar.5.scd.in
@@ -374,6 +374,11 @@ A group may hide all but one element, showing them only on mouse hover. In order
 	Defines the direction of the transition animation. If true, the hidden elements will slide from left to right. If false, they will slide from right to left.
 	When the bar is vertical, it reads as top-to-bottom.
 
+*empty-if-drawer-empty*: ++
+	typeof: bool ++
+	default: false ++
+	Defines whether the group should be assigned the "empty" CSS class when all modules inside the drawer are hidden or missing. If false, the group will not receive the "empty" class as long as the leader module remains visible. This allows users to dynamically style or hide the entire group using CSS when its drawer contents are unavailable.
+
 ```
 "group/power": {
     "orientation": "inherit",
@@ -390,6 +395,19 @@ A group may hide all but one element, showing them only on mouse hover. In order
     ]
 },
 ```
+To hide the power group if it is empty, apply to #power and all its children:
+```
+#power.empty,
+#power.empty * {
+    min-width: 0px;
+    min-height: 0px;
+    padding: 0px;
+    margin: 0px;
+    border: none;
+    font-size: 0px;
+    opacity: 0;
+}
+```
 
 # SUPPORTED MODULES