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

@@ -5,8 +5,6 @@ project(
     meson_version: '>= 0.50.0',
     default_options : [
         'cpp_std=c++20',
-        'buildtype=release',
-        'default_library=static'
     ],
 )
 
@@ -98,6 +96,7 @@ 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 +272,14 @@ 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 +380,12 @@ endif
 
 subdir('protocol')
 
+app_resources = []
+subdir('resources/icons')
+
 executable(
     'waybar',
-    src_files,
+    [src_files, app_resources],
     dependencies: [
         thread_dep,
         client_protos,
@@ -392,6 +402,7 @@ 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_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]);