Initial implementation

include/factory.hpp

@@ -68,6 +68,9 @@
 #ifdef HAVE_UPOWER
 #include "modules/upower/upower.hpp"
 #endif
+#ifdef HAVE_PIPEWIRE
+#include "modules/privacy/privacy.hpp"
+#endif
 #ifdef HAVE_LIBPULSE
 #include "modules/pulseaudio.hpp"
 #endif
@@ -101,7 +104,7 @@ namespace waybar {
 class Factory {
  public:
   Factory(const Bar& bar, const Json::Value& config);
-  AModule* makeModule(const std::string& name) const;
+  AModule* makeModule(const std::string& name, const std::string& pos) const;
 
  private:
   const Bar& bar_;

include/modules/privacy/privacy.hpp

@@ -0,0 +1,44 @@
+#pragma once
+
+#include <iostream>
+#include <map>
+#include <string>
+
+#include "ALabel.hpp"
+#include "gtkmm/box.h"
+#include "modules/privacy/privacy_item.hpp"
+#include "util/pipewire/pipewire_backend.hpp"
+#include "util/pipewire/privacy_node_info.hpp"
+
+using waybar::util::PipewireBackend::PrivacyNodeInfo;
+
+namespace waybar::modules::privacy {
+
+class Privacy : public AModule {
+ public:
+  Privacy(const std::string &, const Json::Value &, const std::string &pos);
+  auto update() -> void override;
+
+  void onPrivacyNodesChanged();
+
+ private:
+  std::list<PrivacyNodeInfo *> nodes_screenshare;  // Screen is being shared
+  std::list<PrivacyNodeInfo *> nodes_audio_in;     // Application is using the microphone
+  std::list<PrivacyNodeInfo *> nodes_audio_out;    // Application is outputting audio
+
+  PrivacyItem privacy_item_screenshare;
+  PrivacyItem privacy_item_audio_input;
+  PrivacyItem privacy_item_audio_output;
+
+  sigc::connection visibility_conn;
+
+  // Config
+  Gtk::Box box_;
+  uint iconSpacing = 4;
+  uint iconSize = 20;
+  uint transition_duration = 500;
+
+  std::shared_ptr<util::PipewireBackend::PipewireBackend> backend = nullptr;
+};
+
+}  // namespace waybar::modules::privacy

include/modules/privacy/privacy_item.hpp

@@ -0,0 +1,46 @@
+#pragma once
+
+#include <json/value.h>
+
+#include <iostream>
+#include <map>
+#include <mutex>
+#include <string>
+
+#include "gtkmm/box.h"
+#include "gtkmm/image.h"
+#include "gtkmm/revealer.h"
+#include "util/pipewire/privacy_node_info.hpp"
+
+namespace waybar::modules::privacy {
+
+class PrivacyItem : public Gtk::Revealer {
+ public:
+  PrivacyItem(const Json::Value&, enum util::PipewireBackend::PrivacyNodeType privacy_type_,
+              const std::string& pos);
+
+  bool is_enabled();
+
+  void set_in_use(bool in_use);
+
+  void set_icon_size(uint size);
+
+ private:
+  enum util::PipewireBackend::PrivacyNodeType privacy_type;
+
+  std::mutex mutex_;
+  sigc::connection signal_conn;
+
+  bool init = false;
+  bool in_use = false;
+  std::string lastStatus;
+
+  // Config
+  bool enabled = true;
+  std::string iconName = "image-missing-symbolic";
+
+  Gtk::Box box_;
+  Gtk::Image icon_;
+};
+
+}  // namespace waybar::modules::privacy

include/util/pipewire/pipewire_backend.hpp

@@ -0,0 +1,40 @@
+#pragma once
+
+#include <pipewire/pipewire.h>
+
+#include "util/backend_common.hpp"
+#include "util/pipewire/privacy_node_info.hpp"
+
+namespace waybar::util::PipewireBackend {
+
+class PipewireBackend {
+ private:
+  pw_thread_loop* mainloop_;
+  pw_context* context_;
+  pw_core* core_;
+
+  spa_hook registry_listener;
+
+  /* Hack to keep constructor inaccessible but still public.
+   * This is required to be able to use std::make_shared.
+   * It is important to keep this class only accessible via a reference-counted
+   * pointer because the destructor will manually free memory, and this could be
+   * a problem with C++20's copy and move semantics.
+   */
+  struct private_constructor_tag {};
+
+ public:
+  std::mutex mutex_;
+
+  pw_registry* registry;
+
+  sigc::signal<void> privacy_nodes_changed_signal_event;
+
+  std::unordered_map<uint32_t, PrivacyNodeInfo*> privacy_nodes;
+
+  static std::shared_ptr<PipewireBackend> getInstance();
+
+  PipewireBackend(private_constructor_tag tag);
+  ~PipewireBackend();
+};
+}  // namespace waybar::util::pipewire::PipewireBackend

include/util/pipewire/privacy_node_info.hpp

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <pipewire/pipewire.h>
+
+#include <string>
+
+namespace waybar::util::PipewireBackend {
+
+enum PrivacyNodeType {
+  PRIVACY_NODE_TYPE_NONE,
+  PRIVACY_NODE_TYPE_VIDEO_INPUT,
+  PRIVACY_NODE_TYPE_AUDIO_INPUT,
+  PRIVACY_NODE_TYPE_AUDIO_OUTPUT
+};
+
+class PrivacyNodeInfo {
+ public:
+  PrivacyNodeType type = PRIVACY_NODE_TYPE_NONE;
+  uint32_t id;
+  uint32_t client_id;
+  enum pw_node_state state = PW_NODE_STATE_IDLE;
+  std::string media_class;
+  std::string media_name;
+  std::string node_name;
+
+  struct spa_hook node_listener;
+
+  bool changed = false;
+
+  void* data;
+
+  PrivacyNodeInfo(uint32_t id_, void* data_) : id(id_), data(data_) {}
+
+  ~PrivacyNodeInfo() { spa_hook_remove(&node_listener); }
+};
+}  // namespace waybar::util::pipewire::PipewireBackend

meson.build

@@ -98,6 +98,7 @@ libinput = dependency('libinput', required: get_option('libinput'))
 libnl = dependency('libnl-3.0', required: get_option('libnl'))
 libnlgen = dependency('libnl-genl-3.0', required: get_option('libnl'))
 upower_glib = dependency('upower-glib', required: get_option('upower_glib'))
+pipewire = dependency('libpipewire-0.3', required: get_option('pipewire'))
 playerctl = dependency('playerctl', version : ['>=2.0.0'], required: get_option('mpris'))
 libpulse = dependency('libpulse', required: get_option('pulseaudio'))
 libudev = dependency('libudev', required: get_option('libudev'))
@@ -273,6 +274,14 @@ if (upower_glib.found() and giounix.found() and not get_option('logind').disable
     src_files += 'src/modules/upower/upower_tooltip.cpp'
 endif
 
+
+if (pipewire.found())
+    add_project_arguments('-DHAVE_PIPEWIRE', language: 'cpp')
+    src_files += 'src/modules/privacy/privacy.cpp'
+    src_files += 'src/modules/privacy/privacy_item.cpp'
+    src_files += 'src/util/pipewire_backend.cpp'
+endif
+
 if (playerctl.found() and giounix.found() and not get_option('logind').disabled())
     add_project_arguments('-DHAVE_MPRIS', language: 'cpp')
     src_files += 'src/modules/mpris/mpris.cpp'
@@ -373,9 +382,12 @@ endif
 
 subdir('protocol')
 
+app_resources = []
+subdir('resources/icons')
+
 executable(
     'waybar',
-    src_files,
+    [src_files, app_resources],
     dependencies: [
         thread_dep,
         client_protos,
@@ -392,6 +404,7 @@ executable(
         libnl,
         libnlgen,
         upower_glib,
+        pipewire,
         playerctl,
         libpulse,
         libjack,

meson_options.txt

@@ -5,6 +5,7 @@ option('libudev', type: 'feature', value: 'auto', description: 'Enable libudev s
 option('libevdev', type: 'feature', value: 'auto', description: 'Enable libevdev support for evdev related features')
 option('pulseaudio', type: 'feature', value: 'auto', description: 'Enable support for pulseaudio')
 option('upower_glib', type: 'feature', value: 'auto', description: 'Enable support for upower')
+option('pipewire', type: 'feature', value: 'auto', description: 'Enable support for pipewire')
 option('mpris', type: 'feature', value: 'auto', description: 'Enable support for mpris')
 option('systemd', type: 'feature', value: 'auto', description: 'Install systemd user service unit')
 option('dbusmenu-gtk', type: 'feature', value: 'auto', description: 'Enable support for tray')

resources/icons/meson.build

@@ -0,0 +1,6 @@
+gnome = import('gnome')
+
+app_resources += gnome.compile_resources('icon-resources',
+  'waybar_icons.gresource.xml',
+  c_name: 'waybar_icons'
+)

resources/icons/waybar-privacy-audio-input-symbolic.svg

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg height="16px" viewBox="0 0 16 16" width="16px" xmlns="http://www.w3.org/2000/svg">
+    <path d="m 8 0 c -1.660156 0 -3 1.339844 -3 3 v 5 c 0 1.660156 1.339844 3 3 3 s 3 -1.339844 3 -3 v -5 c 0 -1.660156 -1.339844 -3 -3 -3 z m -6 6 v 2.011719 c 0 2.964843 2.164062 5.429687 5 5.90625 v 2.082031 h 2 v -2.082031 c 2.835938 -0.476563 5 -2.941407 5 -5.90625 v -2.011719 h -1.5 v 2.011719 c 0 2.5 -1.992188 4.488281 -4.5 4.488281 s -4.5 -1.988281 -4.5 -4.488281 v -2.011719 z m 0 0" fill="#2e3436"/>
+</svg>

resources/icons/waybar-privacy-audio-output-symbolic.svg

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" height="16px" viewBox="0 0 16 16" width="16px"><filter id="a" height="100%" width="100%" x="0%" y="0%"><feColorMatrix color-interpolation-filters="sRGB" values="0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0"/></filter><mask id="b"><g filter="url(#a)"><path d="m -1.6 -1.6 h 19.2 v 19.2 h -19.2 z" fill-opacity="0.5"/></g></mask><clipPath id="c"><path d="m 0 0 h 1600 v 1200 h -1600 z"/></clipPath><mask id="d"><g filter="url(#a)"><path d="m -1.6 -1.6 h 19.2 v 19.2 h -19.2 z" fill-opacity="0.7"/></g></mask><clipPath id="e"><path d="m 0 0 h 1600 v 1200 h -1600 z"/></clipPath><mask id="f"><g filter="url(#a)"><path d="m -1.6 -1.6 h 19.2 v 19.2 h -19.2 z" fill-opacity="0.35"/></g></mask><clipPath id="g"><path d="m 0 0 h 1600 v 1200 h -1600 z"/></clipPath><path d="m 1.972656 3.773438 c -0.132812 0.007812 -0.257812 0.070312 -0.34375 0.167968 c -1.066406 1.210938 -1.628906 2.585938 -1.628906 3.984375 c 0 1.402344 0.558594 2.8125 1.617188 4.105469 c 0.175781 0.214844 0.488281 0.246094 0.703124 0.070312 c 0.214844 -0.175781 0.246094 -0.488281 0.070313 -0.703124 c -0.945313 -1.152344 -1.390625 -2.332032 -1.390625 -3.472657 c 0 -1.136719 0.441406 -2.261719 1.378906 -3.324219 c 0.183594 -0.207031 0.164063 -0.523437 -0.042968 -0.707031 c -0.101563 -0.085937 -0.230469 -0.128906 -0.363282 -0.121093 z m 11.984375 0 c -0.105469 0.011718 -0.207031 0.054687 -0.285156 0.121093 c -0.207031 0.183594 -0.226563 0.5 -0.042969 0.710938 c 0.933594 1.058593 1.375 2.183593 1.375 3.320312 c 0 1.140625 -0.445312 2.320313 -1.386718 3.472657 c -0.175782 0.214843 -0.144532 0.527343 0.070312 0.703124 c 0.210938 0.175782 0.527344 0.144532 0.703125 -0.070312 c 1.058594 -1.292969 1.613281 -2.703125 1.613281 -4.101562 c 0 -1.402344 -0.558594 -2.777344 -1.625 -3.988282 c -0.109375 -0.121094 -0.265625 -0.183594 -0.421875 -0.167968 z m -8.101562 0.164062 c -0.480469 0.023438 -0.855469 0.417969 -0.855469 0.898438 v 6.359374 c 0 0.675782 0.742188 1.085938 1.3125 0.730469 l 5.265625 -3.246093 c 0.507813 -0.3125 0.507813 -1.046876 0.003906 -1.363282 l -5.203125 -3.246094 c -0.15625 -0.097656 -0.339844 -0.144531 -0.523437 -0.132812 z m -2.359375 1.050781 c -0.160156 -0.003906 -0.3125 0.066407 -0.410156 0.195313 c -0.679688 0.886718 -1.070313 1.824218 -1.078126 2.792968 c -0.011718 0.964844 0.363282 1.921876 1.085938 2.835938 c 0.167969 0.214844 0.484375 0.25 0.699219 0.078125 c 0.214843 -0.167969 0.253906 -0.484375 0.082031 -0.699219 c -0.617188 -0.777344 -0.875 -1.5 -0.871094 -2.207031 c 0.007813 -0.703125 0.289063 -1.425781 0.875 -2.191406 c 0.167969 -0.21875 0.128906 -0.53125 -0.09375 -0.703125 c -0.082031 -0.0625 -0.183594 -0.097656 -0.289062 -0.101563 z m 9.015625 0 c -0.109375 0.003907 -0.210938 0.039063 -0.292969 0.105469 c -0.21875 0.164062 -0.261719 0.480469 -0.09375 0.699219 c 0.585938 0.765625 0.867188 1.488281 0.875 2.195312 c 0.007812 0.703125 -0.253906 1.425781 -0.867188 2.203125 c -0.171874 0.214844 -0.136718 0.53125 0.082032 0.703125 c 0.214844 0.167969 0.527344 0.132813 0.699218 -0.082031 c 0.722657 -0.914062 1.097657 -1.871094 1.085938 -2.835938 c -0.011719 -0.96875 -0.398438 -1.90625 -1.078125 -2.792968 c -0.097656 -0.128906 -0.253906 -0.199219 -0.410156 -0.195313 z m 0 0" fill="#222222"/><g mask="url(#b)"><g clip-path="url(#c)" transform="matrix(1 0 0 1 -600 -1044)"><path d="m 550 182 c -0.351562 0.003906 -0.695312 0.101562 -1 0.28125 v 3.4375 c 0.304688 0.179688 0.648438 0.277344 1 0.28125 c 1.105469 0 2 -0.894531 2 -2 s -0.894531 -2 -2 -2 z m 0 5 c -0.339844 0 -0.679688 0.058594 -1 0.175781 v 6.824219 h 4 v -4 c 0 -1.65625 -1.34375 -3 -3 -3 z m 0 0"/></g></g><g mask="url(#d)"><g clip-path="url(#e)" transform="matrix(1 0 0 1 -600 -1044)"><path d="m 569 182 v 4 c 1.105469 0 2 -0.894531 2 -2 s -0.894531 -2 -2 -2 z m 0 5 v 7 h 3 v -4 c 0 -1.65625 -1.34375 -3 -3 -3 z m 0 0"/></g></g><g mask="url(#f)"><g clip-path="url(#g)" transform="matrix(1 0 0 1 -600 -1044)"><path d="m 573 182.269531 v 3.449219 c 0.613281 -0.355469 0.996094 -1.007812 1 -1.71875 c 0 -0.714844 -0.382812 -1.375 -1 -1.730469 z m 0 4.90625 v 6.824219 h 2 v -4 c 0 -1.269531 -0.800781 -2.402344 -2 -2.824219 z m 0 0"/></g></g></svg>

resources/icons/waybar-privacy-screen-share-symbolic.svg

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg height="16px" viewBox="0 0 16 16" width="16px" xmlns="http://www.w3.org/2000/svg">
+    <g fill="#2e3436">
+        <path d="m 3 0 c -1.660156 0 -3 1.339844 -3 3 v 7 c 0 1.660156 1.339844 3 3 3 h 10 c 1.660156 0 3 -1.339844 3 -3 v -1 c 0 -0.550781 -0.449219 -1 -1 -1 s -1 0.449219 -1 1 v 1 c 0 0.554688 -0.445312 1 -1 1 h -10 c -0.554688 0 -1 -0.445312 -1 -1 v -7 c 0 -0.554688 0.445312 -1 1 -1 h 4 c 0.550781 0 1 -0.449219 1 -1 s -0.449219 -1 -1 -1 z m 7 0 c -0.550781 0 -1 0.449219 -1 1 s 0.449219 1 1 1 h 2.585938 l -5.292969 5.289062 c -0.1875 0.191407 -0.292969 0.445313 -0.292969 0.710938 s 0.105469 0.519531 0.292969 0.707031 c 0.390625 0.390625 1.023437 0.390625 1.414062 0 l 5.292969 -5.292969 v 2.585938 c 0 0.550781 0.449219 1 1 1 s 1 -0.449219 1 -1 v -5 c 0 -0.085938 -0.011719 -0.171875 -0.035156 -0.257812 c -0.023438 -0.085938 -0.054688 -0.167969 -0.101563 -0.242188 c -0.042969 -0.074219 -0.09375 -0.144531 -0.15625 -0.207031 c 0 0 0 0 0 -0.003907 c -0.015625 -0.011718 -0.03125 -0.023437 -0.046875 -0.035156 c -0.054687 -0.046875 -0.117187 -0.089844 -0.183594 -0.128906 c -0.035156 -0.015625 -0.074218 -0.03125 -0.113281 -0.046875 c -0.050781 -0.0195312 -0.101562 -0.0351562 -0.15625 -0.0507812 c -0.039062 -0.0078126 -0.082031 -0.0117188 -0.121093 -0.015625 c -0.027344 -0.0039063 -0.058594 -0.00781255 -0.085938 -0.0117188 z m -5 14 c -1.105469 0 -2 0.894531 -2 2 h 10 c 0 -1.105469 -0.894531 -2 -2 -2 z m 0 0"/>
+        <path d="m 3 3 v 7 h 10 v -4.171875 l -3.585938 3.585937 c -0.773437 0.773438 -2.054687 0.773438 -2.828124 0 c -0.773438 -0.773437 -0.773438 -2.058593 0 -2.832031 l 3.585937 -3.582031 z m 0 0" fill-opacity="0.34902"/>
+    </g>
+</svg>

resources/icons/waybar_icons.gresource.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gresources>
+  <gresource prefix="/fr/arouillard/waybar/icons/scalable/actions">
+    <file preprocess="xml-stripblanks">waybar-privacy-audio-input-symbolic.svg</file>
+    <file preprocess="xml-stripblanks">waybar-privacy-audio-output-symbolic.svg</file>
+    <file preprocess="xml-stripblanks">waybar-privacy-screen-share-symbolic.svg</file>
+  </gresource>
+</gresources>

src/bar.cpp

@@ -760,7 +760,7 @@ void waybar::Bar::getModules(const Factory& factory, const std::string& pos,
           getModules(factory, ref, group_module);
           module = group_module;
         } else {
-          module = factory.makeModule(ref);
+          module = factory.makeModule(ref, pos);
         }
 
         std::shared_ptr<AModule> module_sp(module);

src/client.cpp

@@ -4,6 +4,7 @@
 
 #include <iostream>
 
+#include "gtkmm/icontheme.h"
 #include "idle-inhibit-unstable-v1-client-protocol.h"
 #include "util/clara.hpp"
 #include "util/format.hpp"
@@ -244,6 +245,11 @@ int waybar::Client::main(int argc, char *argv[]) {
   }
   gtk_app = Gtk::Application::create(argc, argv, "fr.arouillard.waybar",
                                      Gio::APPLICATION_HANDLES_COMMAND_LINE);
+
+  // Initialize Waybars GTK resources with our custom icons
+  auto theme = Gtk::IconTheme::get_default();
+  theme->add_resource_path("/fr/arouillard/waybar/icons");
+
   gdk_display = Gdk::Display::get_default();
   if (!gdk_display) {
     throw std::runtime_error("Can't find display");

src/factory.cpp

@@ -10,7 +10,8 @@
 
 waybar::Factory::Factory(const Bar& bar, const Json::Value& config) : bar_(bar), config_(config) {}
 
-waybar::AModule* waybar::Factory::makeModule(const std::string& name) const {
+waybar::AModule* waybar::Factory::makeModule(const std::string& name,
+                                             const std::string& pos) const {
   try {
     auto hash_pos = name.find('#');
     auto ref = name.substr(0, hash_pos);
@@ -30,6 +31,11 @@ waybar::AModule* waybar::Factory::makeModule(const std::string& name) const {
       return new waybar::modules::upower::UPower(id, config_[name]);
     }
 #endif
+#ifdef HAVE_PIPEWIRE
+    if (ref == "privacy") {
+      return new waybar::modules::privacy::Privacy(id, config_[name], pos);
+    }
+#endif
 #ifdef HAVE_MPRIS
     if (ref == "mpris") {
       return new waybar::modules::mpris::Mpris(id, config_[name]);

src/modules/privacy/privacy.cpp

@@ -0,0 +1,138 @@
+#include "modules/privacy/privacy.hpp"
+
+#include <fmt/core.h>
+#include <pipewire/pipewire.h>
+#include <spdlog/spdlog.h>
+
+#include <cstdio>
+#include <cstring>
+#include <string>
+
+#include "AModule.hpp"
+#include "gtkmm/image.h"
+
+namespace waybar::modules::privacy {
+
+using util::PipewireBackend::PRIVACY_NODE_TYPE_AUDIO_INPUT;
+using util::PipewireBackend::PRIVACY_NODE_TYPE_AUDIO_OUTPUT;
+using util::PipewireBackend::PRIVACY_NODE_TYPE_NONE;
+using util::PipewireBackend::PRIVACY_NODE_TYPE_VIDEO_INPUT;
+
+Privacy::Privacy(const std::string& id, const Json::Value& config, const std::string& pos)
+    : AModule(config, "privacy", id),
+      nodes_screenshare(),
+      nodes_audio_in(),
+      nodes_audio_out(),
+      privacy_item_screenshare(config["screenshare"], PRIVACY_NODE_TYPE_VIDEO_INPUT, pos),
+      privacy_item_audio_input(config["audio-in"], PRIVACY_NODE_TYPE_AUDIO_INPUT, pos),
+      privacy_item_audio_output(config["audio-out"], PRIVACY_NODE_TYPE_AUDIO_OUTPUT, pos),
+      visibility_conn(),
+      box_(Gtk::ORIENTATION_HORIZONTAL, 0) {
+  box_.set_name(name_);
+  box_.add(privacy_item_screenshare);
+  box_.add(privacy_item_audio_output);
+  box_.add(privacy_item_audio_input);
+
+  event_box_.add(box_);
+
+  // Icon Spacing
+  if (config_["icon-spacing"].isUInt()) {
+    iconSpacing = config_["icon-spacing"].asUInt();
+  }
+  box_.set_spacing(iconSpacing);
+
+  // Icon Size
+  if (config_["icon-size"].isUInt()) {
+    iconSize = config_["icon-size"].asUInt();
+  }
+  privacy_item_screenshare.set_icon_size(iconSize);
+  privacy_item_audio_output.set_icon_size(iconSize);
+  privacy_item_audio_input.set_icon_size(iconSize);
+
+  // Transition Duration
+  if (config_["transition-duration"].isUInt()) {
+    transition_duration = config_["transition-duration"].asUInt();
+  }
+  privacy_item_screenshare.set_transition_duration(transition_duration);
+  privacy_item_audio_output.set_transition_duration(transition_duration);
+  privacy_item_audio_input.set_transition_duration(transition_duration);
+
+  if (!privacy_item_screenshare.is_enabled() && !privacy_item_audio_input.is_enabled() &&
+      !privacy_item_audio_output.is_enabled()) {
+    throw std::runtime_error("No privacy modules enabled");
+  }
+  backend = util::PipewireBackend::PipewireBackend::getInstance();
+  backend->privacy_nodes_changed_signal_event.connect(
+      sigc::mem_fun(*this, &Privacy::onPrivacyNodesChanged));
+}
+
+void Privacy::onPrivacyNodesChanged() {
+  nodes_audio_out.clear();
+  nodes_audio_in.clear();
+  nodes_screenshare.clear();
+
+  bool screenshare = false;
+  bool audio_in = false;
+  bool audio_out = false;
+  for (auto& node : backend->privacy_nodes) {
+    if (screenshare && audio_in && audio_out) break;
+    switch (node.second->state) {
+      case PW_NODE_STATE_RUNNING:
+        switch (node.second->type) {
+          case PRIVACY_NODE_TYPE_VIDEO_INPUT:
+            screenshare = true;
+            nodes_screenshare.push_back(node.second);
+            break;
+          case PRIVACY_NODE_TYPE_AUDIO_INPUT:
+            audio_in = true;
+            nodes_audio_in.push_back(node.second);
+            break;
+          case PRIVACY_NODE_TYPE_AUDIO_OUTPUT:
+            audio_out = true;
+            nodes_audio_out.push_back(node.second);
+            break;
+          case PRIVACY_NODE_TYPE_NONE:
+            continue;
+        }
+        break;
+      default:
+        break;
+    }
+  }
+
+  dp.emit();
+}
+
+auto Privacy::update() -> void {
+  bool screenshare = !nodes_screenshare.empty();
+  bool audio_in = !nodes_audio_in.empty();
+  bool audio_out = !nodes_audio_out.empty();
+
+  privacy_item_screenshare.set_in_use(screenshare);
+  privacy_item_audio_input.set_in_use(audio_in);
+  privacy_item_audio_output.set_in_use(audio_out);
+
+  // Hide the whole widget if none are in use
+  bool is_visible = screenshare || audio_in || audio_out;
+  if (is_visible != event_box_.get_visible()) {
+    // Disconnect any previous connection so that it doesn't get activated in
+    // the future, hiding the module when it should be visible
+    visibility_conn.disconnect();
+    if (is_visible) {
+      event_box_.set_visible(true);
+    } else {
+      visibility_conn = Glib::signal_timeout().connect(sigc::track_obj(
+                                                           [this] {
+                                                             event_box_.set_visible(false);
+                                                             return false;
+                                                           },
+                                                           *this),
+                                                       transition_duration);
+    }
+  }
+
+  // Call parent update
+  AModule::update();
+}
+
+}  // namespace waybar::modules::privacy

src/modules/privacy/privacy_item.cpp

@@ -0,0 +1,140 @@
+#include "modules/privacy/privacy_item.hpp"
+
+#include <fmt/core.h>
+#include <pipewire/pipewire.h>
+#include <spdlog/spdlog.h>
+
+#include <cstdio>
+#include <cstring>
+#include <mutex>
+#include <string>
+#include <thread>
+
+#include "AModule.hpp"
+#include "glibmm/main.h"
+#include "glibmm/priorities.h"
+#include "gtkmm/enums.h"
+#include "gtkmm/label.h"
+#include "gtkmm/revealer.h"
+#include "gtkmm/tooltip.h"
+#include "sigc++/adaptors/bind.h"
+#include "util/gtk_icon.hpp"
+#include "util/pipewire/privacy_node_info.hpp"
+
+namespace waybar::modules::privacy {
+
+PrivacyItem::PrivacyItem(const Json::Value& config_,
+                         enum util::PipewireBackend::PrivacyNodeType privacy_type_,
+                         const std::string& pos)
+    : Gtk::Revealer(),
+      privacy_type(privacy_type_),
+      mutex_(),
+      signal_conn(),
+      box_(Gtk::ORIENTATION_HORIZONTAL, 0),
+      icon_() {
+  switch (privacy_type) {
+    case util::PipewireBackend::PRIVACY_NODE_TYPE_AUDIO_INPUT:
+      get_style_context()->add_class("audio-in");
+      iconName = "waybar-privacy-audio-input-symbolic";
+      break;
+    case util::PipewireBackend::PRIVACY_NODE_TYPE_AUDIO_OUTPUT:
+      get_style_context()->add_class("audio-out");
+      iconName = "waybar-privacy-audio-output-symbolic";
+      break;
+    case util::PipewireBackend::PRIVACY_NODE_TYPE_VIDEO_INPUT:
+      get_style_context()->add_class("screenshare");
+      iconName = "waybar-privacy-screen-share-symbolic";
+      break;
+    default:
+    case util::PipewireBackend::PRIVACY_NODE_TYPE_NONE:
+      enabled = false;
+      return;
+  }
+
+  // Set the reveal transition to not look weird when sliding in
+  if (pos == "modules-left") {
+    set_transition_type(Gtk::REVEALER_TRANSITION_TYPE_SLIDE_RIGHT);
+  } else if (pos == "modules-center") {
+    set_transition_type(Gtk::REVEALER_TRANSITION_TYPE_CROSSFADE);
+  } else if (pos == "modules-right") {
+    set_transition_type(Gtk::REVEALER_TRANSITION_TYPE_SLIDE_LEFT);
+  }
+
+  box_.set_name("privacy-item");
+  box_.add(icon_);
+  add(box_);
+
+  // Icon Name
+  if (config_["enabled"].isBool()) {
+    enabled = config_["enabled"].asBool();
+  }
+
+  // Icon Name
+  if (config_["icon-name"].isString()) {
+    iconName = config_["icon-name"].asString();
+  }
+  icon_.set_from_icon_name(iconName, Gtk::ICON_SIZE_INVALID);
+
+  // Don't show by default
+  set_reveal_child(true);
+  set_visible(false);
+}
+
+bool PrivacyItem::is_enabled() { return enabled; }
+
+void PrivacyItem::set_in_use(bool in_use) {
+  mutex_.lock();
+  if (this->in_use == in_use && init) {
+    mutex_.unlock();
+    return;
+  }
+
+  if (init) {
+    // Disconnect any previous connection so that it doesn't get activated in
+    // the future, hiding the module when it should be visible
+    signal_conn.disconnect();
+
+    this->in_use = in_use;
+    if (this->in_use) {
+      set_visible(true);
+      signal_conn = Glib::signal_timeout().connect(sigc::track_obj(
+                                                       [this] {
+                                                         set_reveal_child(true);
+                                                         return false;
+                                                       },
+                                                       *this),
+                                                   0);
+    } else {
+      set_reveal_child(false);
+      signal_conn = Glib::signal_timeout().connect(sigc::track_obj(
+                                                       [this] {
+                                                         set_visible(false);
+                                                         return false;
+                                                       },
+                                                       *this),
+                                                   get_transition_duration());
+    }
+  } else {
+    set_visible(false);
+    set_reveal_child(false);
+  }
+  this->init = true;
+
+  // CSS status class
+  const std::string status = this->in_use ? "in-use" : "";
+  // Remove last status if it exists
+  if (!lastStatus.empty() && get_style_context()->has_class(lastStatus)) {
+    get_style_context()->remove_class(lastStatus);
+  }
+  // Add the new status class to the Box
+  if (!status.empty() && !get_style_context()->has_class(status)) {
+    get_style_context()->add_class(status);
+  }
+  lastStatus = status;
+
+  mutex_.unlock();
+}
+
+void PrivacyItem::set_icon_size(uint size) { icon_.set_pixel_size(size); }
+
+}  // namespace waybar::modules::privacy

src/util/pipewire_backend.cpp

@@ -0,0 +1,149 @@
+#include "util/pipewire/pipewire_backend.hpp"
+
+namespace waybar::util::PipewireBackend {
+
+// TODO: Refresh on suspend wake
+static void get_node_info(void *data_, const struct pw_node_info *info) {
+  PrivacyNodeInfo *p_node_info = static_cast<PrivacyNodeInfo *>(data_);
+  PipewireBackend *backend = (PipewireBackend *)p_node_info->data;
+
+  p_node_info->state = info->state;
+
+  const struct spa_dict_item *item;
+  spa_dict_for_each(item, info->props) {
+    if (strcmp(item->key, PW_KEY_CLIENT_ID) == 0) {
+      p_node_info->client_id = strtoul(item->value, NULL, 10);
+    } else if (strcmp(item->key, PW_KEY_MEDIA_CLASS) == 0) {
+      p_node_info->media_class = item->value;
+      if (strcmp(p_node_info->media_class.c_str(), "Stream/Input/Video") == 0) {
+        p_node_info->type = PRIVACY_NODE_TYPE_VIDEO_INPUT;
+      } else if (strcmp(p_node_info->media_class.c_str(), "Stream/Input/Audio") == 0) {
+        p_node_info->type = PRIVACY_NODE_TYPE_AUDIO_INPUT;
+      } else if (strcmp(p_node_info->media_class.c_str(), "Stream/Output/Audio") == 0) {
+        p_node_info->type = PRIVACY_NODE_TYPE_AUDIO_OUTPUT;
+      }
+    } else if (strcmp(item->key, PW_KEY_MEDIA_NAME) == 0) {
+      p_node_info->media_name = item->value;
+    } else if (strcmp(item->key, PW_KEY_NODE_NAME) == 0) {
+      p_node_info->node_name = item->value;
+    }
+  }
+
+  if (p_node_info->type != PRIVACY_NODE_TYPE_NONE) {
+    backend->mutex_.lock();
+    p_node_info->changed = true;
+    backend->privacy_nodes.insert_or_assign(info->id, p_node_info);
+    backend->mutex_.unlock();
+
+    backend->privacy_nodes_changed_signal_event.emit();
+  } else {
+    if (p_node_info->changed) {
+      backend->mutex_.lock();
+      PrivacyNodeInfo *node = backend->privacy_nodes.at(info->id);
+      delete node;
+      backend->privacy_nodes.erase(info->id);
+      backend->mutex_.unlock();
+
+      backend->privacy_nodes_changed_signal_event.emit();
+    }
+  }
+}
+
+static const struct pw_node_events node_events = {
+    .version = PW_VERSION_NODE_EVENTS,
+    .info = get_node_info,
+};
+
+static void registry_event_global(void *_data, uint32_t id, uint32_t permissions, const char *type,
+                                  uint32_t version, const struct spa_dict *props) {
+  if (strcmp(type, PW_TYPE_INTERFACE_Node) != 0) return;
+
+  PipewireBackend *backend = static_cast<PipewireBackend *>(_data);
+  struct pw_proxy *proxy = (pw_proxy *)pw_registry_bind(backend->registry, id, type, version, 0);
+  if (proxy) {
+    PrivacyNodeInfo *p_node_info;
+    backend->mutex_.lock();
+    if (backend->privacy_nodes.contains(id)) {
+      p_node_info = backend->privacy_nodes.at(id);
+    } else {
+      p_node_info = new PrivacyNodeInfo(id, backend);
+    }
+    backend->mutex_.unlock();
+    pw_proxy_add_object_listener(proxy, &p_node_info->node_listener, &node_events, p_node_info);
+  }
+}
+
+static void registry_event_global_remove(void *_data, uint32_t id) {
+  auto backend = static_cast<PipewireBackend *>(_data);
+
+  backend->mutex_.lock();
+  if (backend->privacy_nodes.contains(id)) {
+    PrivacyNodeInfo *node_info = backend->privacy_nodes.at(id);
+    delete node_info;
+    backend->privacy_nodes.erase(id);
+  }
+  backend->mutex_.unlock();
+
+  backend->privacy_nodes_changed_signal_event.emit();
+}
+
+static const struct pw_registry_events registry_events = {
+    .version = PW_VERSION_REGISTRY_EVENTS,
+    .global = registry_event_global,
+    .global_remove = registry_event_global_remove,
+};
+
+PipewireBackend::PipewireBackend(private_constructor_tag tag)
+    : mainloop_(nullptr), context_(nullptr), core_(nullptr) {
+  pw_init(nullptr, nullptr);
+  mainloop_ = pw_thread_loop_new("waybar", nullptr);
+  if (mainloop_ == nullptr) {
+    throw std::runtime_error("pw_thread_loop_new() failed.");
+  }
+  context_ = pw_context_new(pw_thread_loop_get_loop(mainloop_), nullptr, 0);
+  if (context_ == nullptr) {
+    throw std::runtime_error("pa_context_new() failed.");
+  }
+  core_ = pw_context_connect(context_, nullptr, 0);
+  if (core_ == nullptr) {
+    throw std::runtime_error("pw_context_connect() failed");
+  }
+  registry = pw_core_get_registry(core_, PW_VERSION_REGISTRY, 0);
+
+  spa_zero(registry_listener);
+  pw_registry_add_listener(registry, &registry_listener, &registry_events, this);
+  if (pw_thread_loop_start(mainloop_) < 0) {
+    throw std::runtime_error("pw_thread_loop_start() failed.");
+  }
+}
+
+PipewireBackend::~PipewireBackend() {
+  for (auto &node : privacy_nodes) {
+    delete node.second;
+  }
+
+  if (registry != nullptr) {
+    pw_proxy_destroy((struct pw_proxy *)registry);
+  }
+
+  spa_zero(registry_listener);
+
+  if (core_ != nullptr) {
+    pw_core_disconnect(core_);
+  }
+
+  if (context_ != nullptr) {
+    pw_context_destroy(context_);
+  }
+
+  if (mainloop_ != nullptr) {
+    pw_thread_loop_stop(mainloop_);
+    pw_thread_loop_destroy(mainloop_);
+  }
+}
+
+std::shared_ptr<PipewireBackend> PipewireBackend::getInstance() {
+  private_constructor_tag tag;
+  return std::make_shared<PipewireBackend>(tag);
+}
+}  // namespace waybar::util::PipewireBackend