Clean (#31)

include/ALabel.hpp

@@ -7,13 +7,13 @@ namespace waybar {
 
 class ALabel : public IModule {
   public:
-    ALabel(Json::Value);
+    ALabel(const Json::Value&);
     virtual ~ALabel() = default;
     virtual auto update() -> void;
     virtual operator Gtk::Widget &();
   protected:
     Gtk::Label label_;
-    Json::Value config_;
+    const Json::Value& config_;
 };
 
 }

include/IModule.hpp

@@ -6,9 +6,10 @@ namespace waybar {
 
 class IModule {
   public:
-    virtual ~IModule() {}
+    virtual ~IModule() = default;
     virtual auto update() -> void = 0;
     virtual operator Gtk::Widget &() = 0;
+    Glib::Dispatcher dp; // Hmmm Maybe I should create an abstract class ?
 };
 
 }

include/bar.hpp

@@ -13,12 +13,12 @@ class Factory;
 
 class Bar {
   public:
-    Bar(Client&, std::unique_ptr<struct wl_output *>&&, uint32_t wl_name);
+    Bar(const Client&, std::unique_ptr<struct wl_output *>&&, uint32_t);
     Bar(const Bar&) = delete;
 
     auto toggle() -> void;
 
-    Client& client;
+    const Client& client;
     Gtk::Window window;
     struct wl_surface *surface;
     struct zwlr_layer_surface_v1 *layer_surface;
@@ -43,7 +43,7 @@ class Bar {
     auto setupConfig() -> void;
     auto setupWidgets() -> void;
     auto setupCss() -> void;
-    void getModules(Factory factory, const std::string& pos);
+    void getModules(const Factory&, const std::string&);
 
     uint32_t width_ = 0;
     uint32_t height_ = 30;

include/factory.hpp

@@ -15,11 +15,11 @@ namespace waybar {
 
 class Factory {
   public:
-    Factory(Bar &bar, Json::Value config);
+    Factory(Bar& bar, const Json::Value& config);
-    IModule* makeModule(const std::string &name);
+    IModule* makeModule(const std::string &name) const;
   private:
-    Bar &_bar;
+    Bar& bar_;
-    Json::Value _config;
+    const Json::Value& config_;
 };
 
 }

include/modules/battery.hpp

@@ -15,14 +15,15 @@ namespace fs = std::filesystem;
 
 class Battery : public ALabel {
   public:
-    Battery(Json::Value);
+    Battery(const Json::Value&);
     ~Battery();
     auto update() -> void;
   private:
-    std::string getIcon(uint16_t percentage);
-
     static inline const fs::path data_dir_ = "/sys/class/power_supply/";
   
+    void worker();
+    std::string getIcon(uint16_t percentage);
+
     util::SleeperThread thread_;
     std::vector<fs::path> batteries_;
     int fd_;

include/modules/clock.hpp

@@ -9,7 +9,7 @@ namespace waybar::modules {
 
 class Clock : public ALabel {
   public:
-    Clock(Json::Value);
+    Clock(const Json::Value&);
     auto update() -> void;
   private:
     waybar::util::SleeperThread thread_;

include/modules/cpu.hpp

@@ -9,7 +9,7 @@ namespace waybar::modules {
 
 class Cpu : public ALabel {
   public:
-    Cpu(Json::Value);
+    Cpu(const Json::Value&);
     auto update() -> void;
   private:
     waybar::util::SleeperThread thread_;

include/modules/custom.hpp

@@ -10,10 +10,12 @@ namespace waybar::modules {
 
 class Custom : public ALabel {
   public:
-    Custom(std::string, Json::Value);
+    Custom(const std::string&, const Json::Value&);
     auto update() -> void;
   private:
-    std::string name_;
+    void worker();
+
+    const std::string& name_;
     waybar::util::SleeperThread thread_;
 };
 

include/modules/memory.hpp

@@ -9,7 +9,7 @@ namespace waybar::modules {
 
 class Memory : public ALabel {
   public:
-    Memory(Json::Value);
+    Memory(const Json::Value&);
     auto update() -> void;
   private:
     waybar::util::SleeperThread thread_;

include/modules/network.hpp

@@ -13,7 +13,7 @@ namespace waybar::modules {
 
 class Network : public ALabel {
   public:
-    Network(Json::Value);
+    Network(const Json::Value&);
     ~Network();
     auto update() -> void;
   private:

include/modules/pulseaudio.hpp

@@ -9,7 +9,7 @@ namespace waybar::modules {
 
 class Pulseaudio : public ALabel {
   public:
-    Pulseaudio(Json::Value);
+    Pulseaudio(const Json::Value&);
     ~Pulseaudio();
     auto update() -> void;
   private:

include/modules/sway/ipc/client.hpp

@@ -1,33 +1,41 @@
 #pragma once
 
 #include <iostream>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <sys/un.h>
 #include "ipc.hpp"
 
-/**
+namespace waybar::modules::sway {
- * IPC response including type of IPC response, size of payload and the json
+
- * encoded payload string.
+class Ipc {
- */
+  public:
-struct ipc_response {
+    Ipc();
+    ~Ipc();
+
+		struct ipc_response {
 			uint32_t size;
 			uint32_t type;
 			std::string payload;
+		};
+
+		void connect();
+		struct ipc_response sendCmd(uint32_t type,
+			const std::string& payload = "") const;
+		void subscribe(const std::string& payload) const;
+		struct ipc_response handleEvent() const;
+  protected:
+		static inline const std::string ipc_magic_ = "i3-ipc";
+		static inline const size_t ipc_header_size_ = ipc_magic_.size() + 8;
+
+		const std::string getSocketPath() const;
+		int open(const std::string&) const;
+		struct ipc_response send(int fd, uint32_t type,
+			const std::string& payload = "") const;
+		struct ipc_response recv(int fd) const;
+
+		int fd_;
+		int fd_event_;
 };
 
-/**
+}
- * Gets the path to the IPC socket from sway.
- */
-std::string getSocketPath(void);
-/**
- * Opens the sway socket.
- */
-int ipcOpenSocket(const std::string &socketPath);
-/**
- * Issues a single IPC command and returns the buffer. len will be updated with
- * the length of the buffer returned from sway.
- */
-struct ipc_response ipcSingleCommand(int socketfd, uint32_t type,
-  const std::string& payload);
-/**
- * Receives a single IPC response and returns an ipc_response.
- */
-struct ipc_response ipcRecvResponse(int socketfd);

include/modules/sway/ipc/ipc.hpp

@@ -1,6 +1,6 @@
 #pragma once
 
-#define event_mask(ev) (1 << (ev & 0x7F))
+#define event_mask(ev) (1u << (ev & 0x7F))
 
 enum ipc_command_type {
 	// i3 command types - see i3's I3_REPLY_TYPE constants

include/modules/sway/window.hpp

@@ -6,23 +6,23 @@
 #include "util/chrono.hpp"
 #include "util/json.hpp"
 #include "ALabel.hpp"
+#include "modules/sway/ipc/client.hpp"
 
 namespace waybar::modules::sway {
 
 class Window : public ALabel {
   public:
-    Window(waybar::Bar&, Json::Value);
+    Window(waybar::Bar&, const Json::Value&);
-    ~Window();
     auto update() -> void;
   private:
+    void worker();
     std::string getFocusedNode(Json::Value nodes);
     void getFocusedWindow();
 
     Bar& bar_;
     waybar::util::SleeperThread thread_;
     util::JsonParser parser_;
-    int ipcfd_;
+    Ipc ipc_;
-    int ipc_eventfd_;
     std::string window_;
 };
 

include/modules/sway/workspaces.hpp

@@ -6,16 +6,17 @@
 #include "util/chrono.hpp"
 #include "util/json.hpp"
 #include "IModule.hpp"
+#include "modules/sway/ipc/client.hpp"
 
 namespace waybar::modules::sway {
 
 class Workspaces : public IModule {
   public:
-    Workspaces(waybar::Bar&, Json::Value);
+    Workspaces(waybar::Bar&, const Json::Value&);
-    ~Workspaces();
     auto update() -> void;
     operator Gtk::Widget &();
   private:
+    void worker();
     void addWorkspace(Json::Value);
     std::string getIcon(std::string);
     bool handleScroll(GdkEventScroll*);
@@ -23,7 +24,7 @@ class Workspaces : public IModule {
     int getNextWorkspace();
 
     Bar& bar_;
-    Json::Value config_;
+    const Json::Value& config_;
     waybar::util::SleeperThread thread_;
     Gtk::Box box_;
     util::JsonParser parser_;
@@ -31,8 +32,7 @@ class Workspaces : public IModule {
     bool scrolling_;
     std::unordered_map<int, Gtk::Button> buttons_;
     Json::Value workspaces_;
-    int ipcfd_;
+    Ipc ipc_;
-    int ipc_eventfd_;
 };
 
 }

include/util/chrono.hpp

@@ -70,25 +70,12 @@ struct SleeperThread {
     condvar_.notify_all();
   }
 
-  void emit()
-  {
-    Glib::signal_idle().connect_once([this] {
-      sig_update.emit();
-    });
-  }
-
   ~SleeperThread()
   {
     do_run_ = false;
     condvar_.notify_all();
-    auto native_handle = thread_.native_handle();
+    thread_.detach();
-    pthread_cancel(native_handle);
-    if (thread_.joinable()) {
-      thread_.join();
   }
-  }
-
-  sigc::signal<void> sig_update;
 
 private:
   std::thread thread_;

include/util/json.hpp

@@ -7,32 +7,25 @@ namespace waybar::util {
 struct JsonParser {
 
   JsonParser()
-    : _reader(_builder.newCharReader())
+    : reader_(builder_.newCharReader())
   {}
 
-  Json::Value parse(const std::string data)
+  const Json::Value parse(const std::string data) const
   {
     Json::Value root;
     std::string err;
-    if (_reader == nullptr) {
-      throw std::runtime_error("Unable to parse");
-    }
     bool res =
-      _reader->parse(data.c_str(), data.c_str() + data.size(), &root, &err);
+      reader_->parse(data.c_str(), data.c_str() + data.size(), &root, &err);
     if (!res)
       throw std::runtime_error(err);
     return root;
   }
 
-  ~JsonParser()
+  ~JsonParser() = default;
-  {
-    delete _reader;
-    _reader = nullptr;
-  }
 
 private:
-  Json::CharReaderBuilder _builder;
+  Json::CharReaderBuilder builder_;
-  Json::CharReader *_reader;
+  std::unique_ptr<Json::CharReader> const reader_;
 };
 
 }

src/ALabel.cpp

@@ -1,7 +1,7 @@
 #include "ALabel.hpp"
 
-waybar::ALabel::ALabel(Json::Value config)
+waybar::ALabel::ALabel(const Json::Value& config)
-  : config_(std::move(config))
+  : config_(config)
 {
 	if (config_["max-length"]) {
     label_.set_max_width_chars(config_["max-length"].asUInt());

src/bar.cpp

@@ -3,10 +3,11 @@
 #include "factory.hpp"
 #include "util/json.hpp"
 
-waybar::Bar::Bar(Client &client,
+waybar::Bar::Bar(const Client& client,
   std::unique_ptr<struct wl_output *> &&p_output, uint32_t p_wl_name)
   : client(client), window{Gtk::WindowType::WINDOW_TOPLEVEL},
-    output(std::move(p_output)), wl_name(std::move(p_wl_name))
+    surface(nullptr), layer_surface(nullptr),
+    output(std::move(p_output)), wl_name(p_wl_name)
 {
   static const struct zxdg_output_v1_listener xdgOutputListener = {
     .logical_position = handleLogicalPosition,
@@ -135,13 +136,13 @@ auto waybar::Bar::toggle() -> void
 
 auto waybar::Bar::setupConfig() -> void
 {
-  util::JsonParser parser;
   std::ifstream file(client.config_file);
   if (!file.is_open()) {
     throw std::runtime_error("Can't open config file");
   }
   std::string str((std::istreambuf_iterator<char>(file)),
     std::istreambuf_iterator<char>());
+  util::JsonParser parser;
   config_ = parser.parse(str);
 }
 
@@ -150,7 +151,7 @@ auto waybar::Bar::setupCss() -> void
   css_provider_ = Gtk::CssProvider::create();
   style_context_ = Gtk::StyleContext::create();
 
-  // load our css file, wherever that may be hiding
+  // Load our css file, wherever that may be hiding
   if (css_provider_->load_from_path(client.css_file)) {
     Glib::RefPtr<Gdk::Screen> screen = window.get_screen();
     style_context_->add_provider_for_screen(screen, css_provider_,
@@ -158,20 +159,22 @@ auto waybar::Bar::setupCss() -> void
   }
 }
 
-void waybar::Bar::getModules(Factory factory, const std::string& pos)
+void waybar::Bar::getModules(const Factory& factory, const std::string& pos)
 {
   if (config_[pos]) {
     for (const auto &name : config_[pos]) {
       try {
+        auto module = factory.makeModule(name.asString());
         if (pos == "modules-left") {
-          modules_left_.emplace_back(factory.makeModule(name.asString()));
+          modules_left_.emplace_back(module);
         }
         if (pos == "modules-center") {
-          modules_center_.emplace_back(factory.makeModule(name.asString()));
+          modules_center_.emplace_back(module);
         }
         if (pos == "modules-right") {
-          modules_right_.emplace_back(factory.makeModule(name.asString()));
+          modules_right_.emplace_back(module);
         }
+        module->dp.connect([module] { module->update(); });
       } catch (const std::exception& e) {
         std::cerr << e.what() << std::endl;
       }

src/factory.cpp

@@ -1,38 +1,38 @@
 #include "factory.hpp"
 
-waybar::Factory::Factory(Bar &bar, Json::Value config)
+waybar::Factory::Factory(Bar& bar, const Json::Value& config)
-  : _bar(bar), _config(std::move(config))
+  : bar_(bar), config_(config)
 {}
 
-waybar::IModule* waybar::Factory::makeModule(const std::string &name)
+waybar::IModule* waybar::Factory::makeModule(const std::string &name) const
 {
   try {
     if (name == "battery") {
-      return new waybar::modules::Battery(_config[name]);
+      return new waybar::modules::Battery(config_[name]);
     }
     if (name == "sway/workspaces") {
-      return new waybar::modules::sway::Workspaces(_bar, _config[name]);
+      return new waybar::modules::sway::Workspaces(bar_, config_[name]);
     }
     if (name == "sway/window") {
-      return new waybar::modules::sway::Window(_bar, _config[name]);
+      return new waybar::modules::sway::Window(bar_, config_[name]);
     }
     if (name == "memory") {
-      return new waybar::modules::Memory(_config[name]);
+      return new waybar::modules::Memory(config_[name]);
     }
     if (name == "cpu") {
-      return new waybar::modules::Cpu(_config[name]);
+      return new waybar::modules::Cpu(config_[name]);
     }
     if (name == "clock") {
-      return new waybar::modules::Clock(_config[name]);
+      return new waybar::modules::Clock(config_[name]);
     }
     if (name == "network") {
-      return new waybar::modules::Network(_config[name]);
+      return new waybar::modules::Network(config_[name]);
     }
     if (name == "pulseaudio") {
-      return new waybar::modules::Pulseaudio(_config[name]);
+      return new waybar::modules::Pulseaudio(config_[name]);
     }
     if (name.compare(0, 7, "custom/") == 0 && name.size() > 7) {
-      return new waybar::modules::Custom(name.substr(7), _config[name]);
+      return new waybar::modules::Custom(name.substr(7), config_[name]);
     }
   } catch (const std::exception& e) {
     auto err = fmt::format("Disabling module \"{}\", {}", name, e.what());

src/modules/battery.cpp

@@ -1,7 +1,7 @@
 #include "modules/battery.hpp"
 
-waybar::modules::Battery::Battery(Json::Value config)
+waybar::modules::Battery::Battery(const Json::Value& config)
-  : ALabel(std::move(config))
+  : ALabel(config)
 {
   try {
     for (auto &node : fs::directory_iterator(data_dir_)) {
@@ -23,25 +23,29 @@ waybar::modules::Battery::Battery(Json::Value config)
   for (auto &bat : batteries_) {
     inotify_add_watch(fd_, (bat / "uevent").c_str(), IN_ACCESS);
   }
-  // Trigger first values
-  update();
   label_.set_name("battery");
-  thread_.sig_update.connect(sigc::mem_fun(*this, &Battery::update));
+  worker();
+}
+
+waybar::modules::Battery::~Battery()
+{
+  close(fd_);
+}
+
+void waybar::modules::Battery::worker()
+{
+  // Trigger first values
+  dp.emit();
   thread_ = [this] {
     struct inotify_event event = {0};
     int nbytes = read(fd_, &event, sizeof(event));
     if (nbytes != sizeof(event)) {
       return;
     }
-    thread_.emit();
+    dp.emit();
   };
 }
 
-waybar::modules::Battery::~Battery()
-{
-  close(fd_);
-}
-
 auto waybar::modules::Battery::update() -> void
 {
   try {

src/modules/clock.cpp

@@ -1,14 +1,13 @@
 #include "modules/clock.hpp"
 
-waybar::modules::Clock::Clock(Json::Value config)
+waybar::modules::Clock::Clock(const Json::Value& config)
-  : ALabel(std::move(config))
+  : ALabel(config)
 {
   label_.set_name("clock");
   uint32_t interval = config_["interval"] ? config_["inveral"].asUInt() : 60;
-  thread_.sig_update.connect(sigc::mem_fun(*this, &Clock::update));
   thread_ = [this, interval] {
     auto now = waybar::chrono::clock::now();
-    thread_.emit();
+    dp.emit();
     auto timeout = std::chrono::floor<std::chrono::seconds>(now
       + std::chrono::seconds(interval));
     thread_.sleep_until(timeout);

src/modules/cpu.cpp

@@ -1,13 +1,12 @@
 #include "modules/cpu.hpp"
 
-waybar::modules::Cpu::Cpu(Json::Value config)
+waybar::modules::Cpu::Cpu(const Json::Value& config)
-  : ALabel(std::move(config))
+  : ALabel(config)
 {
   label_.set_name("cpu");
   uint32_t interval = config_["interval"] ? config_["inveral"].asUInt() : 10;
-  thread_.sig_update.connect(sigc::mem_fun(*this, &Cpu::update));
   thread_ = [this, interval] {
-    thread_.emit();
+    dp.emit();
     thread_.sleep_for(chrono::seconds(interval));
   };
 }

src/modules/custom.cpp

@@ -1,11 +1,17 @@
 #include "modules/custom.hpp"
 
-waybar::modules::Custom::Custom(std::string name, Json::Value config)
+waybar::modules::Custom::Custom(const std::string& name,
-  : ALabel(std::move(config)), name_(std::move(name))
+  const Json::Value& config)
+  : ALabel(config), name_(name)
 {
   if (!config_["exec"]) {
     throw std::runtime_error(name_ + " has no exec path.");
   }
+  worker();
+}
+
+void waybar::modules::Custom::worker()
+{
   uint32_t interval = config_["interval"] ? config_["inveral"].asUInt() : 30;
   thread_ = [this, interval] {
     bool can_update = true;
@@ -16,11 +22,10 @@ waybar::modules::Custom::Custom(std::string name, Json::Value config)
       }
     }
     if (can_update) {
-      thread_.emit();
+      dp.emit();
     }
     thread_.sleep_for(chrono::seconds(interval));
   };
-  thread_.sig_update.connect(sigc::mem_fun(*this, &Custom::update));
 }
 
 auto waybar::modules::Custom::update() -> void

src/modules/memory.cpp

@@ -1,13 +1,12 @@
 #include "modules/memory.hpp"
 
-waybar::modules::Memory::Memory(Json::Value config)
+waybar::modules::Memory::Memory(const Json::Value& config)
-  : ALabel(std::move(config))
+  : ALabel(config)
 {
   label_.set_name("memory");
   uint32_t interval = config_["interval"] ? config_["inveral"].asUInt() : 30;
-  thread_.sig_update.connect(sigc::mem_fun(*this, &Memory::update));
   thread_ = [this, interval] {
-    thread_.emit();
+    dp.emit();
     thread_.sleep_for(chrono::seconds(interval));
   };
 }

src/modules/network.cpp

@@ -1,7 +1,7 @@
 #include "modules/network.hpp"
 
-waybar::modules::Network::Network(Json::Value config)
+waybar::modules::Network::Network(const Json::Value& config)
-  : ALabel(std::move(config)), family_(AF_INET),
+  : ALabel(config), family_(AF_INET),
     signal_strength_dbm_(0), signal_strength_(0)
 {
   sock_fd_ = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
@@ -31,8 +31,7 @@ waybar::modules::Network::Network(Json::Value config)
   label_.set_name("network");
   // Trigger first values
   getInfo();
-  update();
+  dp.emit();
-  thread_.sig_update.connect(sigc::mem_fun(*this, &Network::update));
   thread_ = [this] {
     char buf[4096];
     uint64_t len = netlinkResponse(sock_fd_, buf, sizeof(buf),
@@ -69,7 +68,7 @@ waybar::modules::Network::Network(Json::Value config)
     }
     if (need_update) {
       getInfo();
-      thread_.emit();
+      dp.emit();
     }
   };
 }
@@ -116,20 +115,18 @@ void waybar::modules::Network::disconnected()
 // Based on https://gist.github.com/Yawning/c70d804d4b8ae78cc698
 int waybar::modules::Network::getExternalInterface()
 {
+  static const uint32_t route_buffer_size = 8192;
   struct nlmsghdr *hdr = nullptr;
   struct rtmsg *rt = nullptr;
-  void *resp = nullptr;
+  char resp[route_buffer_size] = {0};
   int ifidx = -1;
 
-  /* Allocate space for the request. */
+  /* Prepare request. */
   uint32_t reqlen = NLMSG_SPACE(sizeof(*rt));
-  void *req = nullptr;
+  char req[reqlen] = {0};
-  if ((req = calloc(1, reqlen)) == nullptr) {
-    goto out; /* ENOBUFS */
-  }
 
   /* Build the RTM_GETROUTE request. */
-  hdr = static_cast<struct nlmsghdr *>(req);
+  hdr = reinterpret_cast<struct nlmsghdr *>(req);
   hdr->nlmsg_len = NLMSG_LENGTH(sizeof(*rt));
   hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
   hdr->nlmsg_type = RTM_GETROUTE;
@@ -142,12 +139,6 @@ int waybar::modules::Network::getExternalInterface()
     goto out;
   }
 
-  /* Allocate space for the response. */
-  static const uint32_t route_buffer_size = 8192;
-  if ((resp = calloc(1, route_buffer_size)) == nullptr) {
-    goto out; /* ENOBUFS */
-  }
-
   /* Read the response(s).
    *
    * WARNING: All the packets generated by the request must be consumed (as in,
@@ -160,7 +151,7 @@ int waybar::modules::Network::getExternalInterface()
     }
 
     /* Parse the response payload into netlink messages. */
-    for (hdr = static_cast<struct nlmsghdr *>(resp); NLMSG_OK(hdr, len);
+    for (hdr = reinterpret_cast<struct nlmsghdr *>(resp); NLMSG_OK(hdr, len);
       hdr = NLMSG_NEXT(hdr, len)) {
       if (hdr->nlmsg_type == NLMSG_DONE) {
         goto out;
@@ -241,10 +232,6 @@ int waybar::modules::Network::getExternalInterface()
   } while (true);
 
 out:
-  if (req != nullptr)
-    free(req);
-  if (resp != nullptr)
-    free(resp);
   return ifidx;
 }
 
@@ -269,8 +256,9 @@ uint64_t waybar::modules::Network::netlinkResponse(int fd, void *resp,
   struct iovec iov = { resp, resplen };
   struct msghdr msg = { &sa, sizeof(sa), &iov, 1, nullptr, 0, 0 };
   ret = recvmsg(fd, &msg, 0);
-  if (msg.msg_flags & MSG_TRUNC)
+  if (msg.msg_flags & MSG_TRUNC) {
     return -1;
+  }
   return ret;
 }
 

src/modules/pulseaudio.cpp

@@ -1,7 +1,7 @@
 #include "modules/pulseaudio.hpp"
 
-waybar::modules::Pulseaudio::Pulseaudio(Json::Value config)
+waybar::modules::Pulseaudio::Pulseaudio(const Json::Value& config)
-  : ALabel(std::move(config)), mainloop_(nullptr), mainloop_api_(nullptr),
+  : ALabel(config), mainloop_(nullptr), mainloop_api_(nullptr),
     context_(nullptr), sink_idx_(0), volume_(0), muted_(false)
 {
   label_.set_name("pulseaudio");
@@ -89,7 +89,7 @@ void waybar::modules::Pulseaudio::sinkInfoCb(pa_context* /*context*/,
     pa->volume_ = volume * 100.0f;
     pa->muted_ = i->mute != 0;
     pa->desc_ = i->description;
-    Glib::signal_idle().connect_once(sigc::mem_fun(*pa, &Pulseaudio::update));
+    pa->dp.emit();
   }
 }
 

src/modules/sway/ipc/client.cpp

@@ -1,14 +1,17 @@
-#define _POSIX_C_SOURCE 200809L
 #include "modules/sway/ipc/client.hpp"
-#include <cstdio>
-#include <string>
-#include <sys/socket.h>
-#include <sys/un.h>
 
-static const std::string ipc_magic("i3-ipc");
+waybar::modules::sway::Ipc::Ipc()
-static const size_t ipc_header_size = ipc_magic.size() + 8;
+  : fd_(-1), fd_event_(-1)
+{}
 
-std::string getSocketPath() {
+waybar::modules::sway::Ipc::~Ipc()
+{
+  close(fd_);
+  close(fd_event_);
+}
+
+const std::string waybar::modules::sway::Ipc::getSocketPath() const
+{
   const char *env = getenv("SWAYSOCK");
   if (env != nullptr) {
     return std::string(env);
@@ -33,31 +36,41 @@ std::string getSocketPath() {
   return str;
 }
 
-int ipcOpenSocket(const std::string &socketPath) {
+int waybar::modules::sway::Ipc::open(const std::string& socketPath) const
+{
   struct sockaddr_un addr = {0};
-  int socketfd;
+  int fd = -1;
-  if ((socketfd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
+  if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
     throw std::runtime_error("Unable to open Unix socket");
   }
   addr.sun_family = AF_UNIX;
   strncpy(addr.sun_path, socketPath.c_str(), sizeof(addr.sun_path) - 1);
   addr.sun_path[sizeof(addr.sun_path) - 1] = 0;
   int l = sizeof(struct sockaddr_un);
-  if (connect(socketfd, reinterpret_cast<struct sockaddr *>(&addr), l) == -1) {
+  if (::connect(fd, reinterpret_cast<struct sockaddr *>(&addr), l) == -1) {
     throw std::runtime_error("Unable to connect to " + socketPath);
   }
-  return socketfd;
+  return fd;
 }
 
-struct ipc_response ipcRecvResponse(int socketfd) {
+void waybar::modules::sway::Ipc::connect()
+{
+  const std::string& socketPath = getSocketPath();
+  fd_ = open(socketPath);
+  fd_event_ = open(socketPath);
+}
+
+struct waybar::modules::sway::Ipc::ipc_response
+  waybar::modules::sway::Ipc::recv(int fd) const
+{
   std::string header;
-  header.reserve(ipc_header_size);
+  header.reserve(ipc_header_size_);
-  auto data32 = reinterpret_cast<uint32_t *>(header.data() + ipc_magic.size());
+  auto data32 = reinterpret_cast<uint32_t *>(header.data() + ipc_magic_.size());
   size_t total = 0;
 
-  while (total < ipc_header_size) {
+  while (total < ipc_header_size_) {
     ssize_t res =
-      ::recv(socketfd, header.data() + total, ipc_header_size - total, 0);
+      ::recv(fd, header.data() + total, ipc_header_size_ - total, 0);
     if (res <= 0) {
       throw std::runtime_error("Unable to receive IPC response");
     }
@@ -66,32 +79,56 @@ struct ipc_response ipcRecvResponse(int socketfd) {
 
   total = 0;
   std::string payload;
-  payload.reserve(data32[0]);
+  payload.reserve(data32[0] + 1);
   while (total < data32[0]) {
     ssize_t res =
-      ::recv(socketfd, payload.data() + total, data32[0] - total, 0);
+      ::recv(fd, payload.data() + total, data32[0] - total, 0);
     if (res < 0) {
       throw std::runtime_error("Unable to receive IPC response");
     }
     total += res;
   }
+  payload[data32[0]] = 0;
   return { data32[0], data32[1], &payload.front() };
 }
 
-struct ipc_response ipcSingleCommand(int socketfd, uint32_t type,
+struct waybar::modules::sway::Ipc::ipc_response
-  const std::string& payload) {
+  waybar::modules::sway::Ipc::send(int fd, uint32_t type,
+  const std::string& payload) const
+{
   std::string header;
-  header.reserve(ipc_header_size);
+  header.reserve(ipc_header_size_);
-  auto data32 = reinterpret_cast<uint32_t *>(header.data() + ipc_magic.size());
+  auto data32 = reinterpret_cast<uint32_t *>(header.data() + ipc_magic_.size());
-  memcpy(header.data(), ipc_magic.c_str(), ipc_magic.size());
+  memcpy(header.data(), ipc_magic_.c_str(), ipc_magic_.size());
   data32[0] = payload.size();
   data32[1] = type;
 
-  if (send(socketfd, header.data(), ipc_header_size, 0) == -1) {
+  if (::send(fd, header.data(), ipc_header_size_, 0) == -1) {
     throw std::runtime_error("Unable to send IPC header");
   }
-  if (send(socketfd, payload.c_str(), payload.size(), 0) == -1) {
+  if (::send(fd, payload.c_str(), payload.size(), 0) == -1) {
     throw std::runtime_error("Unable to send IPC payload");
   }
-  return ipcRecvResponse(socketfd);
+  return recv(fd);
+}
+
+struct waybar::modules::sway::Ipc::ipc_response
+  waybar::modules::sway::Ipc::sendCmd(uint32_t type,
+  const std::string& payload) const
+{
+  return send(fd_, type, payload);
+}
+
+void waybar::modules::sway::Ipc::subscribe(const std::string& payload) const
+{
+  auto res = send(fd_event_, IPC_SUBSCRIBE, payload);
+  if (res.payload != "{\"success\": true}") {
+    throw std::runtime_error("Unable to subscribe ipc event");
+  }
+}
+
+struct waybar::modules::sway::Ipc::ipc_response
+  waybar::modules::sway::Ipc::handleEvent() const
+{
+  return recv(fd_event_);
 }

src/modules/sway/window.cpp

@@ -1,24 +1,26 @@
 #include "modules/sway/window.hpp"
-#include "modules/sway/ipc/client.hpp"
 
-waybar::modules::sway::Window::Window(Bar &bar, Json::Value config)
+waybar::modules::sway::Window::Window(Bar &bar, const Json::Value& config)
-  : ALabel(std::move(config)), bar_(bar)
+  : ALabel(config), bar_(bar)
 {
   label_.set_name("window");
-  std::string socketPath = getSocketPath();
+  ipc_.connect();
-  ipcfd_ = ipcOpenSocket(socketPath);
+  ipc_.subscribe("[ \"window\" ]");
-  ipc_eventfd_ = ipcOpenSocket(socketPath);
-  ipcSingleCommand(ipc_eventfd_, IPC_SUBSCRIBE, "[ \"window\" ]");
   getFocusedWindow();
-  thread_.sig_update.connect(sigc::mem_fun(*this, &Window::update));
+  // Launch worker
+  worker();
+}
+
+void waybar::modules::sway::Window::worker()
+{
   thread_ = [this] {
     try {
-      auto res = ipcRecvResponse(ipc_eventfd_);
+      auto res = ipc_.handleEvent();
       auto parsed = parser_.parse(res.payload);
       if ((parsed["change"] == "focus" || parsed["change"] == "title")
         && parsed["container"]["focused"].asBool()) {
         window_ = parsed["container"]["name"].asString();
-        thread_.emit();
+        dp.emit();
       }
     } catch (const std::exception& e) {
       std::cerr << e.what() << std::endl;
@@ -26,12 +28,6 @@ waybar::modules::sway::Window::Window(Bar &bar, Json::Value config)
   };
 }
 
-waybar::modules::sway::Window::~Window()
-{
-  close(ipcfd_);
-  close(ipc_eventfd_);
-}
-
 auto waybar::modules::sway::Window::update() -> void
 {
   label_.set_text(window_);
@@ -55,7 +51,7 @@ std::string waybar::modules::sway::Window::getFocusedNode(Json::Value nodes)
 void waybar::modules::sway::Window::getFocusedWindow()
 {
   try {
-    auto res = ipcSingleCommand(ipcfd_, IPC_GET_TREE, "");
+    auto res = ipc_.sendCmd(IPC_GET_TREE);
     auto parsed = parser_.parse(res.payload);
     window_ = getFocusedNode(parsed["nodes"]);
     Glib::signal_idle().connect_once(sigc::mem_fun(*this, &Window::update));

src/modules/sway/workspaces.cpp

@@ -1,15 +1,18 @@
 #include "modules/sway/workspaces.hpp"
-#include "modules/sway/ipc/client.hpp"
 
-waybar::modules::sway::Workspaces::Workspaces(Bar &bar, Json::Value config)
+waybar::modules::sway::Workspaces::Workspaces(Bar& bar,
-  : bar_(bar), config_(std::move(config)), scrolling_(false)
+  const Json::Value& config)
+  : bar_(bar), config_(config), scrolling_(false)
 {
   box_.set_name("workspaces");
-  std::string socketPath = getSocketPath();
+  ipc_.connect();
-  ipcfd_ = ipcOpenSocket(socketPath);
+  ipc_.subscribe("[ \"workspace\" ]");
-  ipc_eventfd_ = ipcOpenSocket(socketPath);
+  // Launch worker
-  ipcSingleCommand(ipc_eventfd_, IPC_SUBSCRIBE, "[ \"workspace\" ]");
+  worker();
-  thread_.sig_update.connect(sigc::mem_fun(*this, &Workspaces::update));
+}
+
+void waybar::modules::sway::Workspaces::worker()
+{
   thread_ = [this] {
     try {
       // Wait for the name of the output
@@ -18,28 +21,24 @@ waybar::modules::sway::Workspaces::Workspaces(Bar &bar, Json::Value config)
           thread_.sleep_for(chrono::milliseconds(150));
         }
       } else if (!workspaces_.empty()) {
-        ipcRecvResponse(ipc_eventfd_);
+        ipc_.handleEvent();
       }
+      {
         std::lock_guard<std::mutex> lock(mutex_);
-      auto res = ipcSingleCommand(ipcfd_, IPC_GET_WORKSPACES, "");
+        auto res = ipc_.sendCmd(IPC_GET_WORKSPACES);
         workspaces_ = parser_.parse(res.payload);
-      thread_.emit();
+      }
+      dp.emit();
     } catch (const std::exception& e) {
       std::cerr << e.what() << std::endl;
     }
   };
 }
 
-waybar::modules::sway::Workspaces::~Workspaces()
-{
-  close(ipcfd_);
-  close(ipc_eventfd_);
-}
-
 auto waybar::modules::sway::Workspaces::update() -> void
 {
-  std::lock_guard<std::mutex> lock(mutex_);
   bool needReorder = false;
+  std::lock_guard<std::mutex> lock(mutex_);
   for (auto it = buttons_.begin(); it != buttons_.end();) {
     auto ws = std::find_if(workspaces_.begin(), workspaces_.end(),
       [it](auto node) -> bool { return node["num"].asInt() == it->first; });
@@ -101,7 +100,7 @@ void waybar::modules::sway::Workspaces::addWorkspace(Json::Value node)
     try {
       std::lock_guard<std::mutex> lock(mutex_);
       auto cmd = fmt::format("workspace \"{}\"", pair.first->first);
-      ipcSingleCommand(ipcfd_, IPC_COMMAND, cmd);
+      ipc_.sendCmd(IPC_COMMAND, cmd);
     } catch (const std::exception& e) {
       std::cerr << e.what() << std::endl;
     }
@@ -144,6 +143,7 @@ bool waybar::modules::sway::Workspaces::handleScroll(GdkEventScroll *e)
   scrolling_ = true;
   int id = -1;
   uint16_t idx = 0;
+  {
     std::lock_guard<std::mutex> lock(mutex_);
     for (; idx < workspaces_.size(); idx += 1) {
       if (workspaces_[idx]["focused"].asBool()) {
@@ -151,6 +151,7 @@ bool waybar::modules::sway::Workspaces::handleScroll(GdkEventScroll *e)
         break;
       }
     }
+  }
   if (id == -1) {
     scrolling_ = false;
     return false;
@@ -171,12 +172,15 @@ bool waybar::modules::sway::Workspaces::handleScroll(GdkEventScroll *e)
       id = getPrevWorkspace();
     }
   }
+  {
+    std::lock_guard<std::mutex> lock(mutex_);
     if (id == workspaces_[idx]["num"].asInt()) {
       scrolling_ = false;
       return false;
     }
-  ipcSingleCommand(ipcfd_, IPC_COMMAND, fmt::format("workspace \"{}\"", id));
+    ipc_.sendCmd(IPC_COMMAND, fmt::format("workspace \"{}\"", id));
     std::this_thread::sleep_for(std::chrono::milliseconds(150));
+  }
   return true;
 }