chore: v0.0.4

README.md

@@ -6,6 +6,7 @@
 
 **Current features**
 - Sway Workspaces
+- Sway focused window name
 - Local time
 - Battery
 - Network
@@ -13,6 +14,7 @@
 - Memory
 - Cpu load average
 - Custom scripts
+- And much more customizations
 
 **Configuration and Customization**
 
@@ -27,7 +29,8 @@ $ ninja -C build
 $ ./build/waybar
 ```
 
-Contributions welcome! - have fun :)
+Contributions welcome! - have fun :)<br>
+The style guidelines is [Google's](https://google.github.io/styleguide/cppguide.html)
 
 ## License
 

include/IModule.hpp

@@ -1,10 +1,14 @@
 #pragma once
 
+#include <gtkmm.h>
+
 namespace waybar {
-  class IModule {
-	  public:
-      virtual ~IModule() {}
-      virtual auto update() -> void = 0;
-      virtual operator Gtk::Widget &() = 0;
-  };
+
+class IModule {
+  public:
+    virtual ~IModule() {}
+    virtual auto update() -> void = 0;
+    virtual operator Gtk::Widget &() = 0;
+};
+
 }

include/bar.hpp

@@ -7,44 +7,47 @@
 
 namespace waybar {
 
-  struct Client;
+class Client;
 
-  struct Bar {
-    Bar(Client& client, std::unique_ptr<struct wl_output *>&& output);
+class Bar {
+  public:
+    Bar(Client&, std::unique_ptr<struct wl_output *>&&);
     Bar(const Bar&) = delete;
+
+    auto setWidth(uint32_t) -> void;
+    auto toggle() -> void;
+
     Client& client;
     Gtk::Window window;
     struct wl_surface *surface;
-    struct zwlr_layer_surface_v1 *layerSurface;
+    struct zwlr_layer_surface_v1 *layer_surface;
     std::unique_ptr<struct wl_output *> output;
-    bool visible = true;
     std::string outputName;
-    auto setWidth(uint32_t) -> void;
-    auto toggle() -> void;
+    bool visible = true;
   private:
-    static void _handleLogicalPosition(void *data,
-      struct zxdg_output_v1 *zxdg_output_v1, int32_t x, int32_t y);
-    static void _handleLogicalSize(void *data,
-      struct zxdg_output_v1 *zxdg_output_v1, int32_t width, int32_t height);
-    static void _handleDone(void *data, struct zxdg_output_v1 *zxdg_output_v1);
-    static void _handleName(void *data, struct zxdg_output_v1 *xdg_output,
-      const char *name);
-    static void _handleDescription(void *data,
-      struct zxdg_output_v1 *zxdg_output_v1, const char *description);
-    static void _layerSurfaceHandleConfigure(void *data,
-      struct zwlr_layer_surface_v1 *surface, uint32_t serial, uint32_t width,
-      uint32_t height);
-    static void _layerSurfaceHandleClosed(void *data,
-      struct zwlr_layer_surface_v1 *surface);
-    auto _setupConfig() -> void;
-    auto _setupWidgets() -> void;
-    auto _setupCss() -> void;
-    uint32_t _width = 0;
-    uint32_t _height = 30;
-    Json::Value _config;
-    Glib::RefPtr<Gtk::StyleContext> _styleContext;
-    Glib::RefPtr<Gtk::CssProvider> _cssProvider;
-    struct zxdg_output_v1 *_xdgOutput;
-  };
+    static void handleLogicalPosition(void *, struct zxdg_output_v1 *, int32_t,
+      int32_t);
+    static void handleLogicalSize(void *, struct zxdg_output_v1 *, int32_t,
+      int32_t);
+    static void handleDone(void *, struct zxdg_output_v1 *);
+    static void handleName(void *, struct zxdg_output_v1 *, const char *);
+    static void handleDescription(void *, struct zxdg_output_v1 *,
+      const char *);
+    static void layerSurfaceHandleConfigure(void *,
+      struct zwlr_layer_surface_v1 *, uint32_t, uint32_t, uint32_t);
+    static void layerSurfaceHandleClosed(void *,
+      struct zwlr_layer_surface_v1 *);
+
+    auto setupConfig() -> void;
+    auto setupWidgets() -> void;
+    auto setupCss() -> void;
+
+    uint32_t width_ = 0;
+    uint32_t height_ = 30;
+    Json::Value config_;
+    Glib::RefPtr<Gtk::StyleContext> style_context_;
+    Glib::RefPtr<Gtk::CssProvider> css_provider_;
+    struct zxdg_output_v1 *xdg_output_;
+};
 
 }

include/client.hpp

@@ -3,44 +3,41 @@
 #include <unistd.h>
 #include <wordexp.h>
 
-#include <iostream>
-
 #include <fmt/format.h>
 
 #include <gdk/gdk.h>
-#include <gtkmm.h>
 #include <wayland-client.h>
 
-#include "wlr-layer-shell-unstable-v1-client-protocol.h"
-
 #include <gdk/gdkwayland.h>
 
 #include "bar.hpp"
 
 namespace waybar {
 
-  struct Client {
-    std::string cssFile;
-    std::string configFile;
+class Client {
+  public:
+    Client(int argc, char *argv[]);
+    int main(int argc, char *argv[]);
 
     Gtk::Main gtk_main;
-
+    std::string css_file;
+    std::string config_file;
     Glib::RefPtr<Gdk::Display> gdk_display;
-    struct wl_display *wlDisplay;
-    struct wl_registry *registry;
-    struct zwlr_layer_shell_v1 *layer_shell;
-    struct zxdg_output_manager_v1 *xdg_output_manager;
-    struct wl_seat *seat;
+    struct wl_display *wl_display = nullptr;
+    struct wl_registry *registry = nullptr;
+    struct zwlr_layer_shell_v1 *layer_shell = nullptr;
+    struct zxdg_output_manager_v1 *xdg_output_manager = nullptr;
+    struct wl_seat *seat = nullptr;
     std::vector<std::unique_ptr<Bar>> bars;
 
-    Client(int argc, char* argv[]);
-    void bind_interfaces();
-    auto setup_css();
-    int main(int argc, char* argv[]);
-  private:
-    static void _handle_global(void *data, struct wl_registry *registry,
-      uint32_t name, const char *interface, uint32_t version);
-    static void _handle_global_remove(void *data,
-      struct wl_registry *registry, uint32_t name);
-  };
+private:
+  void bindInterfaces();
+  auto setupCss();
+
+  static void handleGlobal(void *data, struct wl_registry *registry,
+    uint32_t name, const char *interface, uint32_t version);
+  static void handleGlobalRemove(void *data,
+    struct wl_registry *registry, uint32_t name);
+};
+
 }

include/factory.hpp

@@ -2,7 +2,8 @@
 
 #include <json/json.h>
 #include "modules/clock.hpp"
-#include "modules/workspaces.hpp"
+#include "modules/sway/workspaces.hpp"
+#include "modules/sway/window.hpp"
 #include "modules/battery.hpp"
 #include "modules/memory.hpp"
 #include "modules/cpu.hpp"
@@ -12,13 +13,13 @@
 
 namespace waybar {
 
-  class Factory {
-	  public:
-      Factory(Bar &bar, Json::Value config);
-      IModule &makeModule(std::string name);
-    private:
-      Bar &_bar;
-      Json::Value _config;
-  };
+class Factory {
+  public:
+    Factory(Bar &bar, Json::Value config);
+    IModule *makeModule(const std::string &name);
+  private:
+    Bar &_bar;
+    Json::Value _config;
+};
 
 }

include/modules/battery.hpp

@@ -3,28 +3,31 @@
 #include <json/json.h>
 #include <filesystem>
 #include <fstream>
-#include <gtkmm.h>
 #include <iostream>
 #include <fmt/format.h>
+#include <sys/inotify.h>
+#include <algorithm>
 #include "util/chrono.hpp"
 #include "IModule.hpp"
 
 namespace waybar::modules {
 
-  namespace fs = std::filesystem;
+namespace fs = std::filesystem;
 
-  class Battery : public IModule {
-    public:
-      Battery(Json::Value config);
-      auto update() -> void;
-      operator Gtk::Widget&();
-    private:
-      std::string _getIcon(uint32_t percentage);
-      static inline const fs::path _data_dir = "/sys/class/power_supply/";
-      std::vector<fs::path> _batteries;
-      util::SleeperThread _thread;
-      Gtk::Label _label;
-      Json::Value _config;
-  };
+class Battery : public IModule {
+  public:
+    Battery(Json::Value);
+    auto update() -> void;
+    operator Gtk::Widget&();
+  private:
+    std::string getIcon(uint16_t percentage);
+
+    static inline const fs::path data_dir_ = "/sys/class/power_supply/";
+
+    Gtk::Label label_;
+    Json::Value config_;
+    util::SleeperThread thread_;
+    std::vector<fs::path> batteries_;
+};
 
 }

include/modules/clock.hpp

@@ -1,22 +1,22 @@
 #pragma once
 
 #include <json/json.h>
-#include <gtkmm.h>
 #include <fmt/format.h>
+#include "fmt/time.h"
 #include "util/chrono.hpp"
 #include "IModule.hpp"
 
 namespace waybar::modules {
 
-  class Clock : public IModule {
-    public:
-      Clock(Json::Value config);
-      auto update() -> void;
-      operator Gtk::Widget &();
-    private:
-      Gtk::Label _label;
-      waybar::util::SleeperThread _thread;
-      Json::Value _config;
-  };
+class Clock : public IModule {
+  public:
+    Clock(Json::Value);
+    auto update() -> void;
+    operator Gtk::Widget &();
+  private:
+    Gtk::Label label_;
+    waybar::util::SleeperThread thread_;
+    Json::Value config_;
+};
 
 }

include/modules/cpu.hpp

@@ -1,7 +1,6 @@
 #pragma once
 
 #include <json/json.h>
-#include <gtkmm.h>
 #include <fmt/format.h>
 #include <sys/sysinfo.h>
 #include "util/chrono.hpp"
@@ -9,15 +8,15 @@
 
 namespace waybar::modules {
 
-  class Cpu : public IModule {
-    public:
-      Cpu(Json::Value config);
-      auto update() -> void;
-      operator Gtk::Widget &();
-    private:
-      Gtk::Label _label;
-      waybar::util::SleeperThread _thread;
-      Json::Value _config;
-  };
+class Cpu : public IModule {
+  public:
+    Cpu(Json::Value);
+    auto update() -> void;
+    operator Gtk::Widget &();
+  private:
+    Gtk::Label label_;
+    waybar::util::SleeperThread thread_;
+    Json::Value config_;
+};
 
 }

include/modules/custom.hpp

@@ -1,23 +1,22 @@
 #pragma once
 
 #include <json/json.h>
-#include <gtkmm.h>
 #include <fmt/format.h>
 #include "util/chrono.hpp"
 #include "IModule.hpp"
 
 namespace waybar::modules {
 
-  class Custom : public IModule {
-    public:
-      Custom(std::string name, Json::Value config);
-      auto update() -> void;
-      operator Gtk::Widget &();
-    private:
-      Gtk::Label _label;
-      waybar::util::SleeperThread _thread;
-      const std::string _name;
-      Json::Value _config;
-  };
+class Custom : public IModule {
+  public:
+    Custom(const std::string&, Json::Value);
+    auto update() -> void;
+    operator Gtk::Widget &();
+  private:
+    const std::string name_;
+    Gtk::Label label_;
+    waybar::util::SleeperThread thread_;
+    Json::Value config_;
+};
 
 }

include/modules/memory.hpp

@@ -1,7 +1,6 @@
 #pragma once
 
 #include <json/json.h>
-#include <gtkmm.h>
 #include <fmt/format.h>
 #include <sys/sysinfo.h>
 #include "util/chrono.hpp"
@@ -9,15 +8,15 @@
 
 namespace waybar::modules {
 
-  class Memory : public IModule {
-    public:
-      Memory(Json::Value config);
-      auto update() -> void;
-      operator Gtk::Widget &();
-    private:
-      Gtk::Label _label;
-      waybar::util::SleeperThread _thread;
-      Json::Value _config;
-  };
+class Memory : public IModule {
+  public:
+    Memory(Json::Value);
+    auto update() -> void;
+    operator Gtk::Widget &();
+  private:
+    Gtk::Label label_;
+    waybar::util::SleeperThread thread_;
+    Json::Value config_;
+};
 
 }

include/modules/network.hpp

@@ -5,33 +5,33 @@
 #include <netlink/genl/genl.h>
 #include <netlink/genl/ctrl.h>
 #include <linux/nl80211.h>
-#include <iwlib.h> // TODO
 #include <json/json.h>
-#include <gtkmm.h>
 #include <fmt/format.h>
 #include "util/chrono.hpp"
 #include "IModule.hpp"
 
 namespace waybar::modules {
 
-  class Network : public IModule {
-    public:
-      Network(Json::Value config);
-      auto update() -> void;
-      operator Gtk::Widget &();
-    private:
-      void _parseEssid(struct nlattr **bss);
-      void _parseSignal(struct nlattr **bss);
-      bool _associatedOrJoined(struct nlattr **bss);
-      static int _scanCb(struct nl_msg *msg, void *data);
-      auto _getInfo() -> void;
-      Gtk::Label _label;
-      waybar::util::SleeperThread _thread;
-      Json::Value _config;
-      std::size_t _ifid;
-      std::string _essid;
-      int _signalStrengthdBm;
-      int _signalStrength;
-  };
+class Network : public IModule {
+  public:
+    Network(Json::Value);
+    auto update() -> void;
+    operator Gtk::Widget &();
+  private:
+    static int scanCb(struct nl_msg*, void*);
+
+    void parseEssid(struct nlattr**);
+    void parseSignal(struct nlattr**);
+    bool associatedOrJoined(struct nlattr**);
+    auto getInfo() -> void;
+
+    Gtk::Label label_;
+    waybar::util::SleeperThread thread_;
+    Json::Value config_;
+    std::size_t ifid_;
+    std::string essid_;
+    int signal_strength_dbm_;
+    uint16_t signal_strength_;
+};
 
 }

include/modules/pulseaudio.hpp

@@ -2,34 +2,35 @@
 
 #include <pulse/pulseaudio.h>
 #include <json/json.h>
-#include <gtkmm.h>
 #include <fmt/format.h>
+#include <algorithm>
 #include "IModule.hpp"
 
 namespace waybar::modules {
 
-  class Pulseaudio : public IModule {
-    public:
-      Pulseaudio(Json::Value config);
-      auto update() -> void;
-      operator Gtk::Widget &();
-    private:
-      static void _subscribeCb(pa_context *context,
-        pa_subscription_event_type_t type, uint32_t idx, void *data);
-      static void _contextStateCb(pa_context *c, void *data);
-      static void _sinkInfoCb(pa_context *context, const pa_sink_info *i,
-        int eol, void *data);
-      static void _serverInfoCb(pa_context *context, const pa_server_info *i,
-        void *data);
-      Gtk::Label _label;
-      Json::Value _config;
-      pa_threaded_mainloop *_mainloop;
-      pa_mainloop_api *_mainloop_api;
-      pa_context *_context;
-      uint32_t _sinkIdx{0};
-      int _volume;
-      bool _muted;
-      std::string _desc;
-  };
+class Pulseaudio : public IModule {
+  public:
+    Pulseaudio(Json::Value);
+    auto update() -> void;
+    operator Gtk::Widget &();
+  private:
+    static void subscribeCb(pa_context*, pa_subscription_event_type_t,
+      uint32_t, void*);
+    static void contextStateCb(pa_context*, void*);
+    static void sinkInfoCb(pa_context*, const pa_sink_info*, int, void*);
+    static void serverInfoCb(pa_context*, const pa_server_info*, void*);
+
+    std::string getIcon(uint16_t);
+
+    Gtk::Label label_;
+    Json::Value config_;
+    pa_threaded_mainloop* mainloop_;
+    pa_mainloop_api* mainloop_api_;
+    pa_context* context_;
+    uint32_t sink_idx_{0};
+    uint16_t volume_;
+    bool muted_;
+    std::string desc_;
+};
 
 }

include/modules/sway/ipc/client.hpp

@@ -16,17 +16,17 @@ struct ipc_response {
 /**
  * Gets the path to the IPC socket from sway.
  */
-std::string get_socketpath(void);
+std::string getSocketPath(void);
 /**
  * Opens the sway socket.
  */
-int ipc_open_socket(std::string socket_path);
+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.
  */
-std::string ipc_single_command(int socketfd, uint32_t type, const char *payload, uint32_t *len);
+std::string ipcSingleCommand(int socketfd, uint32_t type, const char *payload, uint32_t *len);
 /**
  * Receives a single IPC response and returns an ipc_response.
  */
-struct ipc_response ipc_recv_response(int socketfd);
+struct ipc_response ipcRecvResponse(int socketfd);

include/modules/sway/window.hpp

@@ -0,0 +1,31 @@
+#pragma once
+
+#include <fmt/format.h>
+#include "bar.hpp"
+#include "client.hpp"
+#include "util/chrono.hpp"
+#include "util/json.hpp"
+#include "IModule.hpp"
+
+namespace waybar::modules::sway {
+
+class Window : public IModule {
+  public:
+    Window(waybar::Bar&, Json::Value);
+    auto update() -> void;
+    operator Gtk::Widget &();
+  private:
+    std::string getFocusedNode(Json::Value nodes);
+    void getFocusedWindow();
+
+    Bar& bar_;
+    Json::Value config_;
+    waybar::util::SleeperThread thread_;
+    Gtk::Label label_;
+    util::JsonParser parser_;
+    int ipcfd_;
+    int ipc_eventfd_;
+    std::string window_;
+};
+
+}

include/modules/sway/workspaces.hpp

@@ -0,0 +1,37 @@
+#pragma once
+
+#include <fmt/format.h>
+#include "bar.hpp"
+#include "client.hpp"
+#include "util/chrono.hpp"
+#include "util/json.hpp"
+#include "IModule.hpp"
+
+namespace waybar::modules::sway {
+
+class Workspaces : public IModule {
+  public:
+    Workspaces(waybar::Bar&, Json::Value);
+    auto update() -> void;
+    operator Gtk::Widget &();
+  private:
+    void addWorkspace(Json::Value);
+    std::string getIcon(std::string);
+    bool handleScroll(GdkEventScroll*);
+    int getPrevWorkspace();
+    int getNextWorkspace();
+
+    Bar& bar_;
+    Json::Value config_;
+    waybar::util::SleeperThread thread_;
+    Gtk::Box box_;
+    util::JsonParser parser_;
+    std::mutex mutex_;
+    bool scrolling_;
+    std::unordered_map<int, Gtk::Button> buttons_;
+    Json::Value workspaces_;
+    int ipcfd_;
+    int ipc_eventfd_;
+};
+
+}

include/modules/workspaces.hpp

@@ -1,27 +0,0 @@
-#pragma once
-
-#include <fmt/format.h>
-#include "bar.hpp"
-#include "client.hpp"
-#include "util/chrono.hpp"
-#include "IModule.hpp"
-
-namespace waybar::modules {
-
-  class Workspaces : public IModule {
-    public:
-      Workspaces(waybar::Bar &bar);
-      auto update() -> void;
-      operator Gtk::Widget &();
-    private:
-      void _addWorkspace(Json::Value node);
-      Json::Value _getWorkspaces();
-      Bar &_bar;
-      waybar::util::SleeperThread _thread;
-      Gtk::Box _box;
-      std::unordered_map<int, Gtk::Button> _buttons;
-      int _ipcSocketfd;
-      int _ipcEventSocketfd;
-  };
-
-}

include/util/chrono.hpp

@@ -39,7 +39,9 @@ namespace waybar::util {
             func();
           } while (do_run);
         }}
-    {}
+    {
+      defined = true;
+    }
 
     SleeperThread& operator=(std::function<void()> func)
     {
@@ -48,6 +50,7 @@ namespace waybar::util {
           func();
         } while (do_run);
       });
+      defined = true;
       return *this;
     }
 
@@ -72,14 +75,17 @@ namespace waybar::util {
     ~SleeperThread()
     {
       do_run = false;
-      condvar.notify_all();
-      thread.join();
+      if (defined) {
+        condvar.notify_all();
+        thread.join();
+      }
     }
 
   private:
     std::thread thread;
     std::condition_variable condvar;
     std::mutex mutex;
+    bool defined = false;
     bool do_run = true;
   };
 

include/util/json.hpp

@@ -0,0 +1,34 @@
+#pragma once
+
+#include <json/json.h>
+
+namespace waybar::util {
+
+  struct JsonParser {
+
+    JsonParser()
+      : _reader(_builder.newCharReader())
+    {}
+
+    Json::Value parse(const std::string data)
+    {
+      Json::Value root;
+      std::string err;
+      bool res =
+        _reader->parse(data.c_str(), data.c_str() + data.size(), &root, &err);
+      if (!res)
+        throw std::runtime_error(err);
+      return root;
+    }
+
+    ~JsonParser()
+    {
+      delete _reader;
+    }
+
+  private:
+    Json::CharReaderBuilder _builder;
+    Json::CharReader *_reader;
+  };
+
+}

meson.build

@@ -1,6 +1,6 @@
 project(
     'waybar', 'cpp', 'c',
-    version: '0.0.2',
+    version: '0.0.4',
     license: 'MIT',
     default_options : ['cpp_std=c++17'],
 )
@@ -37,9 +37,11 @@ libpulse = dependency('libpulse')
 
 subdir('protocol')
 
+src_files = run_command('find', './src', '-name', '*.cpp').stdout().strip().split('\n')
+
 executable(
     'waybar',
-    run_command('find', './src', '-name', '*.cpp').stdout().strip().split('\n'),
+    src_files,
     dependencies: [
         thread_dep,
         wlroots,
@@ -64,3 +66,15 @@ install_data(
     './resources/style.css',
     install_dir: '/etc/xdg/waybar',
 )
+
+clangtidy = find_program('clang-tidy', required: false)
+
+if clangtidy.found()
+    run_target(
+        'tidy',
+        command: [
+            clangtidy,
+            '-checks=*,-fuchsia-default-arguments',
+            '-p', meson.build_root()
+        ] + src_files)
+endif

resources/config

@@ -4,9 +4,21 @@
     // "height": 30, // Waybar height
     // "width": 1280, // Waybar width
     // Choose the order of the modules
-    "modules-left": ["workspaces", "custom/spotify"],
+    "modules-left": ["sway/workspaces", "custom/spotify"],
+    "modules-center": ["sway/window"],
     "modules-right": ["pulseaudio", "network", "cpu", "memory", "battery", "clock"],
     // Modules configuration
+    "sway/workspaces": {
+        // "disable-scroll": true,
+        // "all-outputs": true,
+        // "format-icons": {
+        //     "1": "",
+        //     "2": "",
+        //     "3": "",
+        //     "4": "",
+        //     "5": ""
+        // }
+    },
     "cpu": {
         "format": "{}% "
     },
@@ -14,7 +26,7 @@
         "format": "{}% "
     },
     "battery": {
-        "format": "{value}% {icon}",
+        "format": "{capacity}% {icon}",
         "format-icons": ["", "", "", "", ""]
     },
     "network": {
@@ -22,11 +34,13 @@
         "format": "{essid} ({signalStrength}%) "
     },
     "pulseaudio": {
-        "format": "{}% ",
-        "format-muted": ""
+        "format": "{volume}% {icon}",
+        "format-muted": "",
+        "format-icons": ["", ""]
     },
     "custom/spotify": {
         "format": " {}",
+        "max-length": 40,
         "exec": "$HOME/.bin/mediaplayer.sh"
     }
 }

resources/style.css

@@ -11,33 +11,37 @@ window {
     color: white;
 }
 
-.workspaces button {
+#workspaces button {
     padding: 0 5px;
     background: transparent;
     color: white;
     border-bottom: 3px solid transparent;
 }
 
-.workspaces button.current {
+#workspaces button.icon label {
+    font-size: 10px;
+}
+
+#workspaces button.focused {
     background: #64727D;
     border-bottom: 3px solid white;
 }
 
-.clock, .battery, .cpu, .memory, .network, .pulseaudio, .custom-spotify {
+#clock, #battery, #cpu, #memory, #network, #pulseaudio, #custom-spotify {
     padding: 0 10px;
     margin: 0 5px;
 }
 
-.clock {
+#clock {
     background-color: #64727D;
 }
 
-.battery {
+#battery {
     background-color: #ffffff;
     color: black;
 }
 
-.battery.charging {
+#battery.charging {
     color: white;
     background-color: #26A65B;
 }
@@ -49,7 +53,7 @@ window {
     }
 }
 
-.battery.warning {
+#battery.warning {
     background: #f53c3c;
     color: white;
     animation-name: blink;
@@ -59,30 +63,30 @@ window {
     animation-direction: alternate;
 }
 
-.cpu {
+#cpu {
     background: #2ecc71;
     color: #000000;
 }
 
-.memory {
+#memory {
     background: #9b59b6;
 }
 
-.network {
+#network {
     background: #2980b9;
 }
 
-.pulseaudio {
+#pulseaudio {
     background: #f1c40f;
     color: black;
 }
 
-.pulseaudio.muted {
+#pulseaudio.muted {
     background: #90b1b1;
     color: #2a5c45;
 }
 
-.custom-spotify {
+#custom-spotify {
     background: #66cc99;
     color: #2a5c45;
 }

src/bar.cpp

@@ -1,108 +1,108 @@
-#include <condition_variable>
-#include <gdk/gdkwayland.h>
-#include <thread>
-#include <fstream>
 #include "bar.hpp"
 #include "client.hpp"
 #include "factory.hpp"
+#include "util/json.hpp"
 
 waybar::Bar::Bar(Client &client, std::unique_ptr<struct wl_output *> &&p_output)
   : client(client), window{Gtk::WindowType::WINDOW_TOPLEVEL},
     output(std::move(p_output))
 {
   static const struct zxdg_output_v1_listener xdgOutputListener = {
-    .logical_position = _handleLogicalPosition,
-    .logical_size = _handleLogicalSize,
-    .done = _handleDone,
-    .name = _handleName,
-    .description = _handleDescription,
+    .logical_position = handleLogicalPosition,
+    .logical_size = handleLogicalSize,
+    .done = handleDone,
+    .name = handleName,
+    .description = handleDescription,
   };
-  _xdgOutput =
+  xdg_output_ =
     zxdg_output_manager_v1_get_xdg_output(client.xdg_output_manager, *output);
-	zxdg_output_v1_add_listener(_xdgOutput, &xdgOutputListener, this);
+	zxdg_output_v1_add_listener(xdg_output_, &xdgOutputListener, this);
   window.set_title("waybar");
   window.set_decorated(false);
-  _setupConfig();
-  _setupCss();
-  _setupWidgets();
-  if (_config["height"])
-    _height = _config["height"].asUInt();
-  bool positionBottom = _config["position"] == "bottom";
-  bool layerTop = _config["layer"] == "top";
-  gtk_widget_realize(GTK_WIDGET(window.gobj()));
-  GdkWindow *gdkWindow = gtk_widget_get_window(GTK_WIDGET(window.gobj()));
-  gdk_wayland_window_set_use_custom_surface(gdkWindow);
-  surface = gdk_wayland_window_get_wl_surface(gdkWindow);
-  layerSurface = zwlr_layer_shell_v1_get_layer_surface(
-    client.layer_shell, surface, *output,
-    (layerTop ? ZWLR_LAYER_SHELL_V1_LAYER_TOP : ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM),
-    "waybar");
-  zwlr_layer_surface_v1_set_anchor(layerSurface,
-    ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT | ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT |
-    (positionBottom ? ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM : ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP));
-  zwlr_layer_surface_v1_set_size(layerSurface, _width, _height);
-  static const struct zwlr_layer_surface_v1_listener layerSurfaceListener = {
-    .configure = _layerSurfaceHandleConfigure,
-    .closed = _layerSurfaceHandleClosed,
+  setupConfig();
+  setupCss();
+  setupWidgets();
+  if (config_["height"]) {
+    height_ = config_["height"].asUInt();
+  }
+  Gtk::Widget& wrap(window);
+  gtk_widget_realize(wrap.gobj());
+  GdkWindow *gdk_window = gtk_widget_get_window(wrap.gobj());
+  gdk_wayland_window_set_use_custom_surface(gdk_window);
+  surface = gdk_wayland_window_get_wl_surface(gdk_window);
+  std::size_t layer_top = config_["layer"] == "top"
+    ? ZWLR_LAYER_SHELL_V1_LAYER_TOP : ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM;
+  layer_surface = zwlr_layer_shell_v1_get_layer_surface(
+    client.layer_shell, surface, *output, layer_top, "waybar");
+  std::size_t position_bottom = config_["position"] == "bottom"
+    ? ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM : ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP;
+  zwlr_layer_surface_v1_set_anchor(layer_surface, position_bottom
+    | ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT | ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT);
+  zwlr_layer_surface_v1_set_size(layer_surface, width_, height_);
+  static const struct zwlr_layer_surface_v1_listener layer_surface_listener = {
+    .configure = layerSurfaceHandleConfigure,
+    .closed = layerSurfaceHandleClosed,
   };
-  zwlr_layer_surface_v1_add_listener(layerSurface, &layerSurfaceListener,
-    this);
+  zwlr_layer_surface_v1_add_listener(layer_surface,
+    &layer_surface_listener, this);
   wl_surface_commit(surface);
 }
 
-void waybar::Bar::_handleLogicalPosition(void *data,
-  struct zxdg_output_v1 *zxdg_output_v1, int32_t x, int32_t y)
+void waybar::Bar::handleLogicalPosition(void* /*data*/,
+  struct zxdg_output_v1* /*zxdg_output_v1*/, int32_t /*x*/, int32_t /*y*/)
 {
   // Nothing here
 }
 
-void waybar::Bar::_handleLogicalSize(void *data,
-  struct zxdg_output_v1 *zxdg_output_v1, int32_t width, int32_t height)
+void waybar::Bar::handleLogicalSize(void* /*data*/,
+  struct zxdg_output_v1* /*zxdg_output_v1*/, int32_t /*width*/,
+  int32_t /*height*/)
 {
   // Nothing here
 }
 
-void waybar::Bar::_handleDone(void *data, struct zxdg_output_v1 *zxdg_output_v1)
+void waybar::Bar::handleDone(void* /*data*/,
+  struct zxdg_output_v1* /*zxdg_output_v1*/)
 {
   // Nothing here
 }
 
-void waybar::Bar::_handleName(void *data, struct zxdg_output_v1 *xdg_output,
-  const char *name)
+void waybar::Bar::handleName(void* data, struct zxdg_output_v1* /*xdg_output*/,
+  const char* name)
 {
-	auto o = reinterpret_cast<waybar::Bar *>(data);
+	auto o = static_cast<waybar::Bar *>(data);
   o->outputName = name;
 }
 
-void waybar::Bar::_handleDescription(void *data,
-  struct zxdg_output_v1 *zxdg_output_v1, const char *description)
+void waybar::Bar::handleDescription(void* /*data*/,
+  struct zxdg_output_v1* /*zxdg_output_v1*/, const char* /*description*/)
 {
   // Nothing here
 }
 
-void waybar::Bar::_layerSurfaceHandleConfigure(
-  void *data, struct zwlr_layer_surface_v1 *surface, uint32_t serial,
-  uint32_t width, uint32_t height)
+void waybar::Bar::layerSurfaceHandleConfigure(void* data,
+  struct zwlr_layer_surface_v1* surface, uint32_t serial, uint32_t width,
+  uint32_t height)
 {
-  auto o = reinterpret_cast<waybar::Bar *>(data);
+  auto o = static_cast<waybar::Bar *>(data);
   o->window.show_all();
-  o->setWidth(o->_config["width"] ? o->_config["width"].asUInt() : width);
+  o->setWidth(o->config_["width"] ? o->config_["width"].asUInt() : width);
   zwlr_layer_surface_v1_ack_configure(surface, serial);
-  if (o->_height != height) {
-    height = o->_height;
+  if (o->height_ != height) {
+    height = o->height_;
     std::cout << fmt::format("New Height: {}", height) << std::endl;
-    zwlr_layer_surface_v1_set_size(surface, o->_width, height);
+    zwlr_layer_surface_v1_set_size(surface, o->width_, height);
     zwlr_layer_surface_v1_set_exclusive_zone(surface, o->visible ? height : 0);
     wl_surface_commit(o->surface);
   }
 }
 
-void waybar::Bar::_layerSurfaceHandleClosed(void *data,
-  struct zwlr_layer_surface_v1 *surface)
+void waybar::Bar::layerSurfaceHandleClosed(void* data,
+  struct zwlr_layer_surface_v1* /*surface*/)
 {
-  auto o = reinterpret_cast<waybar::Bar *>(data);
-  zwlr_layer_surface_v1_destroy(o->layerSurface);
-  o->layerSurface = nullptr;
+  auto o = static_cast<waybar::Bar *>(data);
+  zwlr_layer_surface_v1_destroy(o->layer_surface);
+  o->layer_surface = nullptr;
   wl_surface_destroy(o->surface);
   o->surface = nullptr;
   o->window.close();
@@ -110,54 +110,51 @@ void waybar::Bar::_layerSurfaceHandleClosed(void *data,
 
 auto waybar::Bar::setWidth(uint32_t width) -> void
 {
-  if (width == this->_width) return;
+  if (width == width_) {
+    return;
+  }
   std::cout << fmt::format("Bar width configured: {}", width) << std::endl;
-  this->_width = width;
+  width_ = width;
   window.set_size_request(width);
-  window.resize(width, _height);
-  zwlr_layer_surface_v1_set_size(layerSurface, width, _height + 1);
+  window.resize(width, height_);
+  zwlr_layer_surface_v1_set_size(layer_surface, width, height_ + 1);
   wl_surface_commit(surface);
 }
 
 auto waybar::Bar::toggle() -> void
 {
   visible = !visible;
-  auto zone = visible ? _height : 0;
-  zwlr_layer_surface_v1_set_exclusive_zone(layerSurface, zone);
+  auto zone = visible ? height_ : 0;
+  zwlr_layer_surface_v1_set_exclusive_zone(layer_surface, zone);
   wl_surface_commit(surface);
 }
 
-auto waybar::Bar::_setupConfig() -> void
+auto waybar::Bar::setupConfig() -> void
 {
-  Json::Value root;
-  Json::CharReaderBuilder builder;
-  Json::CharReader* reader = builder.newCharReader();
-  std::string err;
-  std::ifstream file(client.configFile);
-  if (!file.is_open())
+  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>());
-  bool res = reader->parse(str.c_str(), str.c_str() + str.size(), &_config, &err);
-  delete reader;
-  if (!res)
-    throw std::runtime_error(err);
+  config_ = parser.parse(str);
 }
 
-auto waybar::Bar::_setupCss() -> void
+auto waybar::Bar::setupCss() -> void
 {
-  _cssProvider = Gtk::CssProvider::create();
-  _styleContext = Gtk::StyleContext::create();
+  css_provider_ = Gtk::CssProvider::create();
+  style_context_ = Gtk::StyleContext::create();
 
   // load our css file, wherever that may be hiding
-  if (_cssProvider->load_from_path(client.cssFile)) {
+  if (css_provider_->load_from_path(client.css_file)) {
     Glib::RefPtr<Gdk::Screen> screen = window.get_screen();
-    _styleContext->add_provider_for_screen(screen, _cssProvider,
+    style_context_->add_provider_for_screen(screen, css_provider_,
       GTK_STYLE_PROVIDER_PRIORITY_USER);
   }
 }
 
-auto waybar::Bar::_setupWidgets() -> void
+auto waybar::Bar::setupWidgets() -> void
 {
   auto &left = *Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL, 0));
   auto &center = *Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL, 0));
@@ -170,25 +167,31 @@ auto waybar::Bar::_setupWidgets() -> void
   box1.pack_start(center, false, false);
   box1.pack_end(right, true, true);
 
-  Factory factory(*this, _config);
+  Factory factory(*this, config_);
 
-  if (_config["modules-left"]) {
-    for (auto name : _config["modules-left"]) {
-      auto &module = factory.makeModule(name.asString());
-      left.pack_start(module, false, true, 0);
+  if (config_["modules-left"]) {
+    for (const auto &name : config_["modules-left"]) {
+      auto module = factory.makeModule(name.asString());
+      if (module != nullptr) {
+        left.pack_start(*module, false, true, 0);
+      }
     }
   }
-  if (_config["modules-center"]) {
-    for (auto name : _config["modules-center"]) {
-      auto &module = factory.makeModule(name.asString());
-      center.pack_start(module, true, false, 10);
+  if (config_["modules-center"]) {
+    for (const auto &name : config_["modules-center"]) {
+      auto module = factory.makeModule(name.asString());
+      if (module != nullptr) {
+        center.pack_start(*module, true, false, 10);
+      }
     }
   }
-  if (_config["modules-right"]) {
-    std::reverse(_config["modules-right"].begin(), _config["modules-right"].end());
-    for (auto name : _config["modules-right"]) {
-      auto &module = factory.makeModule(name.asString());
-      right.pack_end(module, false, false, 0);
+  if (config_["modules-right"]) {
+    std::reverse(config_["modules-right"].begin(), config_["modules-right"].end());
+    for (const auto &name : config_["modules-right"]) {
+      auto module = factory.makeModule(name.asString());
+      if (module != nullptr) {
+        right.pack_end(*module, false, false, 0);
+      }
     }
   }
 }

src/client.cpp

@@ -1,35 +1,33 @@
 #include "client.hpp"
 
 waybar::Client::Client(int argc, char* argv[])
-  : gtk_main(argc, argv),
-    gdk_display(Gdk::Display::get_default()),
-    wlDisplay(gdk_wayland_display_get_wl_display(gdk_display->gobj()))
+  : gtk_main(argc, argv), gdk_display(Gdk::Display::get_default()),
+    wl_display(gdk_wayland_display_get_wl_display(gdk_display->gobj()))
 {
   auto getFirstValidPath = [] (std::vector<std::string> possiblePaths) {
     wordexp_t p;
 
-    for (std::string path: possiblePaths) {
+    for (const std::string &path: possiblePaths) {
       if (wordexp(path.c_str(), &p, 0) == 0) {
-        if (access(p.we_wordv[0], F_OK) == 0) {
-          std::string result = p.we_wordv[0];
+        if (access(*p.we_wordv, F_OK) == 0) {
+          std::string result = *p.we_wordv;
           wordfree(&p);
           return result;
-        } else {
-          wordfree(&p);
         }
+        wordfree(&p);
       }
     }
 
     return std::string();
   };
 
-  configFile = getFirstValidPath({
+  config_file = getFirstValidPath({
     "$XDG_CONFIG_HOME/waybar/config",
     "$HOME/waybar/config",
     "/etc/xdg/waybar/config",
     "./resources/config",
   });
-  cssFile = getFirstValidPath({
+  css_file = getFirstValidPath({
     "$XDG_CONFIG_HOME/waybar/style.css",
     "$HOME/waybar/style.css",
     "/etc/xdg/waybar/style.css",
@@ -38,49 +36,51 @@ waybar::Client::Client(int argc, char* argv[])
 
 }
 
-void waybar::Client::_handle_global(void *data, struct wl_registry *registry,
+void waybar::Client::handleGlobal(void *data, struct wl_registry *registry,
   uint32_t name, const char *interface, uint32_t version)
 {
-  auto o = reinterpret_cast<waybar::Client *>(data);
-  if (!strcmp(interface, zwlr_layer_shell_v1_interface.name)) {
-    o->layer_shell = (zwlr_layer_shell_v1 *)wl_registry_bind(registry, name,
-      &zwlr_layer_shell_v1_interface, version);
-  } else if (!strcmp(interface, wl_output_interface.name)) {
+  auto o = static_cast<waybar::Client *>(data);
+  if (strcmp(interface, zwlr_layer_shell_v1_interface.name) == 0) {
+    o->layer_shell = static_cast<struct zwlr_layer_shell_v1 *>(
+      wl_registry_bind(registry, name, &zwlr_layer_shell_v1_interface, version));
+  } else if (strcmp(interface, wl_output_interface.name) == 0) {
     auto output = std::make_unique<struct wl_output *>();
-    *output = (struct wl_output *)wl_registry_bind(registry, name,
-      &wl_output_interface, version);
-    o->bars.emplace_back(std::make_unique<Bar>(*o, std::move(output)));
-  } else if (!strcmp(interface, wl_seat_interface.name)) {
-    o->seat = (struct wl_seat *)wl_registry_bind(registry, name,
-      &wl_seat_interface, version);
-  } else if (!strcmp(interface, zxdg_output_manager_v1_interface.name)
-    && version >= ZXDG_OUTPUT_V1_NAME_SINCE_VERSION) {
-      o->xdg_output_manager =
-        (struct zxdg_output_manager_v1 *)wl_registry_bind(registry, name,
-        &zxdg_output_manager_v1_interface, ZXDG_OUTPUT_V1_NAME_SINCE_VERSION);
+    *output = static_cast<struct wl_output *>(wl_registry_bind(registry, name,
+      &wl_output_interface, version));
+    if (o->xdg_output_manager != nullptr) {
+      o->bars.emplace_back(std::make_unique<Bar>(*o, std::move(output)));
     }
+  } else if (strcmp(interface, wl_seat_interface.name) == 0) {
+    o->seat = static_cast<struct wl_seat *>(wl_registry_bind(registry, name,
+      &wl_seat_interface, version));
+  } else if (strcmp(interface, zxdg_output_manager_v1_interface.name) == 0
+    && version >= ZXDG_OUTPUT_V1_NAME_SINCE_VERSION) {
+      o->xdg_output_manager = static_cast<struct zxdg_output_manager_v1 *>(
+        wl_registry_bind(registry, name,
+        &zxdg_output_manager_v1_interface, ZXDG_OUTPUT_V1_NAME_SINCE_VERSION));
+  }
 }
 
-void waybar::Client::_handle_global_remove(void *data,
-  struct wl_registry *registry, uint32_t name)
+void waybar::Client::handleGlobalRemove(void* /*data*/,
+  struct wl_registry* /*registry*/, uint32_t /*name*/)
 {
-    // TODO
+    // TODO(someone)
 }
 
-void waybar::Client::bind_interfaces()
+void waybar::Client::bindInterfaces()
 {
-  registry = wl_display_get_registry(wlDisplay);
+  registry = wl_display_get_registry(wl_display);
   static const struct wl_registry_listener registry_listener = {
-    .global = _handle_global,
-    .global_remove = _handle_global_remove,
+    .global = handleGlobal,
+    .global_remove = handleGlobalRemove,
   };
   wl_registry_add_listener(registry, &registry_listener, this);
-  wl_display_roundtrip(wlDisplay);
+  wl_display_roundtrip(wl_display);
 }
 
-int waybar::Client::main(int argc, char* argv[])
+int waybar::Client::main(int /*argc*/, char* /*argv*/[])
 {
-  bind_interfaces();
+  bindInterfaces();
   gtk_main.run();
   return 0;
 }

src/factory.cpp

@@ -1,26 +1,46 @@
 #include "factory.hpp"
 
 waybar::Factory::Factory(Bar &bar, Json::Value config)
-  : _bar(bar), _config(config)
+  : _bar(bar), _config(std::move(config))
 {}
 
-waybar::IModule &waybar::Factory::makeModule(std::string name)
+waybar::IModule *waybar::Factory::makeModule(const std::string &name)
 {
-  if (name == "battery")
-    return *new waybar::modules::Battery(_config[name]);
-  if (name == "workspaces")
-    return *new waybar::modules::Workspaces(_bar);
-  if (name == "memory")
-    return *new waybar::modules::Memory(_config[name]);
-  if (name == "cpu")
-    return *new waybar::modules::Cpu(_config[name]);
-  if (name == "clock")
-    return *new waybar::modules::Clock(_config[name]);
-  if (name == "network")
-    return *new waybar::modules::Network(_config[name]);
-  if (name == "pulseaudio")
-    return *new waybar::modules::Pulseaudio(_config[name]);
-  if (!name.compare(0, 7, "custom/") && name.size() > 7)
-    return *new waybar::modules::Custom(name.substr(7), _config[name]);
-  throw std::runtime_error("Unknown module: " + name);
+  try {
+    if (name == "battery") {
+      return new waybar::modules::Battery(_config[name]);
+    }
+    if (name == "sway/workspaces") {
+      return new waybar::modules::sway::Workspaces(_bar, _config[name]);
+    }
+    if (name == "sway/window") {
+      return new waybar::modules::sway::Window(_bar, _config[name]);
+    }
+    if (name == "memory") {
+      return new waybar::modules::Memory(_config[name]);
+    }
+    if (name == "cpu") {
+      return new waybar::modules::Cpu(_config[name]);
+    }
+    if (name == "clock") {
+      return new waybar::modules::Clock(_config[name]);
+    }
+    if (name == "network") {
+      return new waybar::modules::Network(_config[name]);
+    }
+    if (name == "pulseaudio") {
+      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]);
+    }
+    std::cerr << "Unknown module: " + name << std::endl;
+  } catch (const std::exception& e) {
+    auto err = fmt::format("Disabling module \"{}\", {}", name, e.what());
+    std::cerr << err << std::endl;
+  } catch (...) {
+    auto err = fmt::format("Disabling module \"{}\", Unknown reason", name);
+    std::cerr << err << std::endl;
+  }
+  return nullptr;
 }

src/ipc/client.cpp

@@ -1,100 +0,0 @@
-#define _POSIX_C_SOURCE 200809L
-#include <string>
-#include <stdio.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include "ipc/client.hpp"
-
-static const char ipc_magic[] = {'i', '3', '-', 'i', 'p', 'c'};
-static const size_t ipc_header_size = sizeof(ipc_magic)+8;
-
-std::string get_socketpath(void) {
-  const char *env = getenv("SWAYSOCK");
-  if (env) return std::string(env);
-	std::string str;
-  {
-		std::string str_buf;
-		FILE*  in;
-		char  buf[512] = { 0 };
-		if (!(in = popen("sway --get-socketpath 2>/dev/null", "r"))) {
-			throw std::runtime_error("Failed to get socket path");
-		}
-		while (fgets(buf, sizeof(buf), in) != nullptr) {
-			str_buf.append(buf, sizeof(buf));
-		}
-		pclose(in);
-		str = str_buf;
-	}
-	if (str.back() == '\n') {
-		str.pop_back();
-	}
-	return str;
-}
-
-int ipc_open_socket(std::string socket_path) {
-	struct sockaddr_un addr;
-	int socketfd;
-	if ((socketfd = 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, socket_path.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, (struct sockaddr *)&addr, l) == -1) {
-		throw std::runtime_error("Unable to connect to " + socket_path);
-	}
-	return socketfd;
-}
-
-struct ipc_response ipc_recv_response(int socketfd) {
-	char data[ipc_header_size];
-	uint32_t *data32 = (uint32_t *)(data + sizeof(ipc_magic));
-
-	size_t total = 0;
-	while (total < ipc_header_size) {
-		ssize_t received = recv(socketfd, data + total, ipc_header_size - total, 0);
-		if (received <= 0) {
-			throw std::runtime_error("Unable to receive IPC response");
-		}
-		total += received;
-	}
-
-	struct ipc_response response;
-
-	total = 0;
-	response.size = data32[0];
-	response.type = data32[1];
-  char payload[response.size + 1];
-
-	while (total < response.size) {
-		ssize_t received = recv(socketfd, payload + total, response.size - total, 0);
-		if (received < 0) {
-			throw std::runtime_error("Unable to receive IPC response");
-		}
-		total += received;
-	}
-	payload[response.size] = '\0';
-	response.payload = std::string(payload);
-	return response;
-}
-
-std::string ipc_single_command(int socketfd, uint32_t type, const char *payload, uint32_t *len) {
-	char data[ipc_header_size];
-	uint32_t *data32 = (uint32_t *)(data + sizeof(ipc_magic));
-	memcpy(data, ipc_magic, sizeof(ipc_magic));
-	data32[0] = *len;
-	data32[1] = type;
-
-	if (send(socketfd, data, ipc_header_size, 0) == -1) {
-		throw std::runtime_error("Unable to send IPC header");
-	}
-
-	if (send(socketfd, payload, *len, 0) == -1) {
-		throw std::runtime_error("Unable to send IPC payload");
-	}
-
-	struct ipc_response resp = ipc_recv_response(socketfd);
-	*len = resp.size;
-	return resp.payload;
-}

src/main.cpp

@@ -1,12 +1,12 @@
-#include <gtkmm.h>
-#include <wayland-client.hpp>
-#include <gdk/gdkwayland.h>
-#include <csignal>
 #include "client.hpp"
+#include <csignal>
+#include <iostream>
 
 namespace waybar {
-  static Client* client;
-}
+
+static Client* client;
+
+} // namespace waybar
 
 int main(int argc, char* argv[])
 {
@@ -15,7 +15,7 @@ int main(int argc, char* argv[])
     waybar::client = &c;
     std::signal(SIGUSR1, [] (int signal) {
       for (auto& bar : waybar::client->bars) {
-        bar.get()->toggle();
+        (*bar).toggle();
       }
     });
 

src/modules/battery.cpp

@@ -1,73 +1,90 @@
 #include "modules/battery.hpp"
 
 waybar::modules::Battery::Battery(Json::Value config)
-  : _config(config)
+  : config_(std::move(config))
 {
   try {
-    for (auto &node : fs::directory_iterator(_data_dir)) {
+    for (auto &node : fs::directory_iterator(data_dir_)) {
       if (fs::is_directory(node) && fs::exists(node / "capacity")
-        && fs::exists(node / "status")) {
-        _batteries.push_back(node);
+        && fs::exists(node / "status") && fs::exists(node / "uevent")) {
+        batteries_.push_back(node);
       }
     }
   } catch (fs::filesystem_error &e) {
-    std::cerr << e.what() << std::endl;
+    throw std::runtime_error(e.what());
   }
-
-  if (!_batteries.size()) {
-    std::cerr << "No batteries." << std::endl;
-    return;
+  if (batteries_.empty()) {
+    throw std::runtime_error("No batteries.");
   }
-
-  _label.get_style_context()->add_class("battery");
-  int interval = _config["interval"] ? _config["inveral"].asInt() : 1;
-  _thread = [this, interval] {
+  auto fd = inotify_init();
+  if (fd == -1) {
+    throw std::runtime_error("Unable to listen batteries.");
+  }
+  for (auto &bat : batteries_) {
+    inotify_add_watch(fd, (bat / "uevent").c_str(), IN_ACCESS);
+  }
+  // Trigger first value
+  Glib::signal_idle().connect_once(sigc::mem_fun(*this, &Battery::update));
+  label_.set_name("battery");
+  thread_ = [this, fd] {
+    struct inotify_event event = {};
+    int nbytes = read(fd, &event, sizeof(event));
+    if (nbytes != sizeof(event)) {
+      return;
+    }
     Glib::signal_idle().connect_once(sigc::mem_fun(*this, &Battery::update));
-    _thread.sleep_for(chrono::seconds(interval));
   };
 }
 
 auto waybar::modules::Battery::update() -> void
 {
   try {
-    int total = 0;
-    bool charging = false;
-    for (auto &bat : _batteries) {
-      int capacity;
-      std::string status;
+    uint16_t total = 0;
+    std::string status;
+    for (auto &bat : batteries_) {
+      uint16_t capacity;
+      std::string _status;
       std::ifstream(bat / "capacity") >> capacity;
-      total += capacity;
-      std::ifstream(bat / "status") >> status;
-      if (status == "Charging") {
-        charging = true;
+      std::ifstream(bat / "status") >> _status;
+      if (_status != "Unknown") {
+        status = _status;
       }
+      total += capacity;
     }
-    auto format = _config["format"] ? _config["format"].asString() : "{}%";
-    auto value = total / _batteries.size();
-    _label.set_text(fmt::format(format, fmt::arg("value", value),
-      fmt::arg("icon", _getIcon(value))));
-    _label.set_tooltip_text(charging ? "Charging" : "Discharging");
-    if (charging)
-      _label.get_style_context()->add_class("charging");
-    else
-      _label.get_style_context()->remove_class("charging");
-    if (value < 16 && !charging)
-      _label.get_style_context()->add_class("warning");
-    else
-      _label.get_style_context()->remove_class("warning");
-  } catch (std::exception &e) {
+    uint16_t capacity = total / batteries_.size();
+    auto format = config_["format"]
+      ? config_["format"].asString() : "{capacity}%";
+    label_.set_text(fmt::format(format, fmt::arg("capacity", capacity),
+      fmt::arg("icon", getIcon(capacity))));
+    label_.set_tooltip_text(status);
+    bool charging = status == "Charging";
+    if (charging) {
+      label_.get_style_context()->add_class("charging");
+    } else {
+      label_.get_style_context()->remove_class("charging");
+    }
+    auto critical = config_["critical"] ? config_["critical"].asUInt() : 15;
+    if (capacity <= critical && !charging) {
+      label_.get_style_context()->add_class("warning");
+    } else {
+      label_.get_style_context()->remove_class("warning");
+    }
+  } catch (const std::exception& e) {
     std::cerr << e.what() << std::endl;
   }
 }
 
-std::string waybar::modules::Battery::_getIcon(uint32_t percentage)
+std::string waybar::modules::Battery::getIcon(uint16_t percentage)
 {
-  if (!_config["format-icons"] || !_config["format-icons"].isArray()) return "";
-  auto step = 100 / _config["format-icons"].size();
-  return _config["format-icons"][percentage / step].asString();
+  if (!config_["format-icons"] || !config_["format-icons"].isArray()) {
+    return "";
+  }
+  auto size = config_["format-icons"].size();
+  auto idx = std::clamp(percentage / (100 / size), 0U, size - 1);
+  return config_["format-icons"][idx].asString();
 }
 
 waybar::modules::Battery::operator Gtk::Widget &()
 {
-  return _label;
+  return label_;
 }

src/modules/clock.cpp

@@ -1,27 +1,26 @@
 #include "modules/clock.hpp"
 
 waybar::modules::Clock::Clock(Json::Value config)
-  : _config(config)
+  : config_(std::move(config))
 {
-  _label.get_style_context()->add_class("clock");
-  _thread = [this] {
-    Glib::signal_idle().connect_once(sigc::mem_fun(*this, &Clock::update));
+  label_.set_name("clock");
+  uint32_t interval = config_["interval"] ? config_["inveral"].asUInt() : 60;
+  thread_ = [this, interval] {
     auto now = waybar::chrono::clock::now();
-    auto timeout =
-      std::chrono::floor<std::chrono::minutes>(now + std::chrono::minutes(1));
-    _thread.sleep_until(timeout);
+    Glib::signal_idle().connect_once(sigc::mem_fun(*this, &Clock::update));
+    auto timeout = std::chrono::floor<std::chrono::seconds>(now
+      + std::chrono::seconds(interval));
+    thread_.sleep_until(timeout);
   };
 };
 
 auto waybar::modules::Clock::update() -> void
 {
-  auto t = std::time(nullptr);
-  auto localtime = std::localtime(&t);
-  auto format =
-    _config["format"] ? _config["format"].asString() : "{:02}:{:02}";
-  _label.set_text(fmt::format(format, localtime->tm_hour, localtime->tm_min));
+  auto localtime = fmt::localtime(std::time(nullptr));
+  auto format = config_["format"] ? config_["format"].asString() : "{:%H:%M}";
+  label_.set_text(fmt::format(format, localtime));
 }
 
 waybar::modules::Clock::operator Gtk::Widget &() {
-  return _label;
+  return label_;
 }

src/modules/cpu.cpp

@@ -1,27 +1,27 @@
 #include "modules/cpu.hpp"
 
 waybar::modules::Cpu::Cpu(Json::Value config)
-  : _config(config)
+  : config_(std::move(config))
 {
-  _label.get_style_context()->add_class("cpu");
-  int interval = _config["interval"] ? _config["inveral"].asInt() : 10;
-  _thread = [this, interval] {
+  label_.set_name("cpu");
+  uint32_t interval = config_["interval"] ? config_["inveral"].asUInt() : 10;
+  thread_ = [this, interval] {
     Glib::signal_idle().connect_once(sigc::mem_fun(*this, &Cpu::update));
-    _thread.sleep_for(chrono::seconds(interval));
+    thread_.sleep_for(chrono::seconds(interval));
   };
 };
 
 auto waybar::modules::Cpu::update() -> void
 {
-  struct sysinfo info;
-  if (!sysinfo(&info)) {
-    float f_load = 1.f / (1 << SI_LOAD_SHIFT);
-    int load = info.loads[0] * f_load * 100 / get_nprocs();
-    auto format = _config["format"] ? _config["format"].asString() : "{}%";
-    _label.set_text(fmt::format(format, load));
+  struct sysinfo info = {};
+  if (sysinfo(&info) == 0) {
+    float f_load = 1.f / (1U << SI_LOAD_SHIFT);
+    uint16_t load = info.loads[0] * f_load * 100 / get_nprocs();
+    auto format = config_["format"] ? config_["format"].asString() : "{}%";
+    label_.set_text(fmt::format(format, load));
   }
 }
 
 waybar::modules::Cpu::operator Gtk::Widget &() {
-  return _label;
+  return label_;
 }

src/modules/custom.cpp

@@ -1,32 +1,37 @@
 #include "modules/custom.hpp"
 #include <iostream>
 
-waybar::modules::Custom::Custom(std::string name, Json::Value config)
-  : _name(name), _config(config)
+waybar::modules::Custom::Custom(const std::string &name, Json::Value config)
+  : name_(name), config_(std::move(config))
 {
-  if (!_config["exec"]) {
-    std::cerr << name + " has no exec path." << std::endl;
-    return;
+  if (!config_["exec"]) {
+    throw std::runtime_error(name_ + " has no exec path.");
   }
-  int interval = _config["interval"] ? _config["inveral"].asInt() : 30;
-  _thread = [this, interval] {
+  if (config_["max-length"]) {
+    label_.set_max_width_chars(config_["max-length"].asUInt());
+    label_.set_ellipsize(Pango::EllipsizeMode::ELLIPSIZE_END);
+  }
+  uint32_t interval = config_["interval"] ? config_["inveral"].asUInt() : 30;
+  thread_ = [this, interval] {
     Glib::signal_idle().connect_once(sigc::mem_fun(*this, &Custom::update));
-    _thread.sleep_for(chrono::seconds(interval));
+    thread_.sleep_for(chrono::seconds(interval));
   };
 };
 
 auto waybar::modules::Custom::update() -> void
 {
-  std::array<char, 128> buffer;
+  std::array<char, 128> buffer = {0};
   std::string output;
-  std::shared_ptr<FILE> fp(popen(_config["exec"].asCString(), "r"), pclose);
+  std::shared_ptr<FILE> fp(popen(config_["exec"].asCString(), "r"), pclose);
   if (!fp) {
-    std::cerr << _name + " can't exec " + _config["exec"].asString() << std::endl;
+    std::cerr << name_ + " can't exec " + config_["exec"].asString() << std::endl;
     return;
   }
-  while (!feof(fp.get())) {
-    if (fgets(buffer.data(), 128, fp.get()) != nullptr)
+
+  while (feof(fp.get()) == 0) {
+    if (fgets(buffer.data(), 128, fp.get()) != nullptr) {
         output += buffer.data();
+    }
   }
 
   // Remove last newline
@@ -36,16 +41,18 @@ auto waybar::modules::Custom::update() -> void
 
   // Hide label if output is empty
   if (output.empty()) {
-    _label.get_style_context()->remove_class("custom-" + _name);
-    _label.hide();
+    label_.set_name("");
+    label_.hide();
   } else {
-    _label.get_style_context()->add_class("custom-" + _name);
-    auto format = _config["format"] ? _config["format"].asString() : "{}";
-    _label.set_text(fmt::format(format, output));
-    _label.show();
+    label_.set_name("custom-" + name_);
+    auto format = config_["format"] ? config_["format"].asString() : "{}";
+    auto str = fmt::format(format, output);
+    label_.set_text(str);
+    label_.set_tooltip_text(str);
+    label_.show();
   }
 }
 
 waybar::modules::Custom::operator Gtk::Widget &() {
-  return _label;
+  return label_;
 }

src/modules/memory.cpp

@@ -1,30 +1,30 @@
 #include "modules/memory.hpp"
 
 waybar::modules::Memory::Memory(Json::Value config)
-  : _config(config)
+  : config_(std::move(config))
 {
-  _label.get_style_context()->add_class("memory");
-  int interval = _config["interval"] ? _config["inveral"].asInt() : 30;
-  _thread = [this, interval] {
+  label_.set_name("memory");
+  uint32_t interval = config_["interval"] ? config_["inveral"].asUInt() : 30;
+  thread_ = [this, interval] {
     Glib::signal_idle().connect_once(sigc::mem_fun(*this, &Memory::update));
-    _thread.sleep_for(chrono::seconds(interval));
+    thread_.sleep_for(chrono::seconds(interval));
   };
 };
 
 auto waybar::modules::Memory::update() -> void
 {
-  struct sysinfo info;
-  if (!sysinfo(&info)) {
+  struct sysinfo info = {};
+  if (sysinfo(&info) == 0) {
     auto total = info.totalram * info.mem_unit;
     auto freeram = info.freeram * info.mem_unit;
     int used_ram_percentage = 100 * (total - freeram) / total;
-    auto format = _config["format"] ? _config["format"].asString() : "{}%";
-    _label.set_text(fmt::format(format, used_ram_percentage));
+    auto format = config_["format"] ? config_["format"].asString() : "{}%";
+    label_.set_text(fmt::format(format, used_ram_percentage));
     auto used_ram_gigabytes = (total - freeram) / std::pow(1024, 3);
-    _label.set_tooltip_text(fmt::format("{:.{}f}Gb used", used_ram_gigabytes, 1));
+    label_.set_tooltip_text(fmt::format("{:.{}f}Gb used", used_ram_gigabytes, 1));
   }
 }
 
 waybar::modules::Memory::operator Gtk::Widget &() {
-  return _label;
+  return label_;
 }

src/modules/network.cpp

@@ -1,28 +1,35 @@
 #include "modules/network.hpp"
 
+#include <iostream>
+
 waybar::modules::Network::Network(Json::Value config)
-  : _config(config), _ifid(if_nametoindex(config["interface"].asString().c_str()))
+  : config_(std::move(config)),
+    ifid_(if_nametoindex(config_["interface"].asCString())),
+    signal_strength_dbm_(0), signal_strength_(0)
 {
-  _label.get_style_context()->add_class("network");
-  int interval = _config["interval"] ? _config["inveral"].asInt() : 30;
-  _thread = [this, interval] {
+  if (ifid_ == 0) {
+    throw std::runtime_error("Can't found network interface");
+  }
+  label_.set_name("network");
+  uint32_t interval = config_["interval"] ? config_["inveral"].asUInt() : 30;
+  thread_ = [this, interval] {
+    getInfo();
     Glib::signal_idle().connect_once(sigc::mem_fun(*this, &Network::update));
-    _thread.sleep_for(chrono::minutes(1));
+    thread_.sleep_for(chrono::seconds(interval));
   };
 };
 
 auto waybar::modules::Network::update() -> void
 {
-  _getInfo();
-  auto format = _config["format"] ? _config["format"].asString() : "{}";
-  _label.set_text(fmt::format(format,
-    fmt::arg("essid", _essid),
-    fmt::arg("signaldBm", _signalStrengthdBm),
-    fmt::arg("signalStrength", _signalStrength)
+  auto format = config_["format"] ? config_["format"].asString() : "{essid}";
+  label_.set_text(fmt::format(format,
+    fmt::arg("essid", essid_),
+    fmt::arg("signaldBm", signal_strength_dbm_),
+    fmt::arg("signalStrength", signal_strength_)
   ));
 }
 
-int waybar::modules::Network::_scanCb(struct nl_msg *msg, void *data) {
+int waybar::modules::Network::scanCb(struct nl_msg *msg, void *data) {
     auto net = static_cast<waybar::modules::Network *>(data);
     auto gnlh = static_cast<genlmsghdr *>(nlmsg_data(nlmsg_hdr(msg)));
     struct nlattr* tb[NL80211_ATTR_MAX + 1];
@@ -38,23 +45,27 @@ int waybar::modules::Network::_scanCb(struct nl_msg *msg, void *data) {
     bss_policy[NL80211_BSS_SIGNAL_UNSPEC].type = NLA_U8;
     bss_policy[NL80211_BSS_STATUS].type = NLA_U32;
 
-    if (nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), nullptr) < 0)
+    if (nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), nullptr) < 0) {
       return NL_SKIP;
-    if (!tb[NL80211_ATTR_BSS])
+    }
+    if (tb[NL80211_ATTR_BSS] == nullptr) {
       return NL_SKIP;
-    if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], bss_policy))
+    }
+    if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS], bss_policy) != 0) {
       return NL_SKIP;
-    if (!net->_associatedOrJoined(bss))
+    }
+    if (!net->associatedOrJoined(bss)) {
       return NL_SKIP;
-    net->_parseEssid(bss);
-    net->_parseSignal(bss);
-    // TODO: parse quality
+    }
+    net->parseEssid(bss);
+    net->parseSignal(bss);
+    // TODO(someone): parse quality
     return NL_SKIP;
 }
 
-void waybar::modules::Network::_parseEssid(struct nlattr **bss)
+void waybar::modules::Network::parseEssid(struct nlattr **bss)
 {
-  _essid.clear();
+  essid_.clear();
   if (bss[NL80211_BSS_INFORMATION_ELEMENTS] != nullptr) {
     auto ies =
       static_cast<char*>(nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]));
@@ -67,29 +78,30 @@ void waybar::modules::Network::_parseEssid(struct nlattr **bss)
     if (ies_len > hdr_len && ies_len > ies[1] + hdr_len) {
       auto essid_begin = ies + hdr_len;
       auto essid_end = essid_begin + ies[1];
-      std::copy(essid_begin, essid_end, std::back_inserter(_essid));
+      std::copy(essid_begin, essid_end, std::back_inserter(essid_));
     }
   }
 }
 
-void waybar::modules::Network::_parseSignal(struct nlattr **bss) {
+void waybar::modules::Network::parseSignal(struct nlattr **bss) {
     if (bss[NL80211_BSS_SIGNAL_MBM] != nullptr) {
       // signalstrength in dBm
-      _signalStrengthdBm =
+      signal_strength_dbm_ =
         static_cast<int>(nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM])) / 100;
 
       // WiFi-hardware usually operates in the range -90 to -20dBm.
       const int hardwareMax = -20;
       const int hardwareMin = -90;
-      _signalStrength = ((double)(_signalStrengthdBm - hardwareMin)
-        / (double)(hardwareMax - hardwareMin)) * 100;
+      signal_strength_ = ((signal_strength_dbm_ - hardwareMin)
+        / double{hardwareMax - hardwareMin}) * 100;
     }
   }
 
-bool waybar::modules::Network::_associatedOrJoined(struct nlattr** bss)
+bool waybar::modules::Network::associatedOrJoined(struct nlattr** bss)
 {
-    if (!bss[NL80211_BSS_STATUS])
+    if (bss[NL80211_BSS_STATUS] == nullptr) {
       return false;
+    }
     auto status = nla_get_u32(bss[NL80211_BSS_STATUS]);
     switch (status) {
       case NL80211_BSS_STATUS_ASSOCIATED:
@@ -101,16 +113,14 @@ bool waybar::modules::Network::_associatedOrJoined(struct nlattr** bss)
     }
   }
 
-auto waybar::modules::Network::_getInfo() -> void
+auto waybar::modules::Network::getInfo() -> void
 {
-  if (_ifid == 0)
-    return;
 	struct nl_sock *sk = nl_socket_alloc();
 	if (genl_connect(sk) != 0) {
     nl_socket_free(sk);
     return;
   }
-  if (nl_socket_modify_cb(sk, NL_CB_VALID, NL_CB_CUSTOM, _scanCb, this) < 0) {
+  if (nl_socket_modify_cb(sk, NL_CB_VALID, NL_CB_CUSTOM, scanCb, this) < 0) {
     nl_socket_free(sk);
     return;
   }
@@ -120,13 +130,13 @@ auto waybar::modules::Network::_getInfo() -> void
     return;
   }
   struct nl_msg *msg = nlmsg_alloc();
-  if (!msg) {
+  if (msg == nullptr) {
     nl_socket_free(sk);
     return;
   }
-  if (!genlmsg_put(msg, NL_AUTO_PORT, NL_AUTO_SEQ, nl80211_id, 0,
-    NLM_F_DUMP, NL80211_CMD_GET_SCAN, 0) ||
-    nla_put_u32(msg, NL80211_ATTR_IFINDEX, _ifid) < 0) {
+  if (genlmsg_put(msg, NL_AUTO_PORT, NL_AUTO_SEQ, nl80211_id, 0, NLM_F_DUMP,
+    NL80211_CMD_GET_SCAN, 0) == nullptr
+    || nla_put_u32(msg, NL80211_ATTR_IFINDEX, ifid_) < 0) {
     nlmsg_free(msg);
     return;
   }
@@ -135,5 +145,5 @@ auto waybar::modules::Network::_getInfo() -> void
 }
 
 waybar::modules::Network::operator Gtk::Widget &() {
-  return _label;
+  return label_;
 }

src/modules/pulseaudio.cpp

@@ -1,39 +1,44 @@
 #include "modules/pulseaudio.hpp"
 
 waybar::modules::Pulseaudio::Pulseaudio(Json::Value config)
-  : _config(config), _mainloop(nullptr), _mainloop_api(nullptr),
-    _context(nullptr), _sinkIdx(0), _volume(0), _muted(false)
+  : config_(std::move(config)), mainloop_(nullptr), mainloop_api_(nullptr),
+    context_(nullptr), sink_idx_(0), volume_(0), muted_(false)
 {
-  _label.get_style_context()->add_class("pulseaudio");
-  _mainloop = pa_threaded_mainloop_new();
-  if (!_mainloop)
+  label_.set_name("pulseaudio");
+  mainloop_ = pa_threaded_mainloop_new();
+  if (mainloop_ == nullptr) {
     throw std::runtime_error("pa_mainloop_new() failed.");
-  pa_threaded_mainloop_lock(_mainloop);
-  _mainloop_api = pa_threaded_mainloop_get_api(_mainloop);
-  _context = pa_context_new(_mainloop_api, "waybar");
-  if (!_context)
+  }
+  pa_threaded_mainloop_lock(mainloop_);
+  mainloop_api_ = pa_threaded_mainloop_get_api(mainloop_);
+  context_ = pa_context_new(mainloop_api_, "waybar");
+  if (context_ == nullptr) {
     throw std::runtime_error("pa_context_new() failed.");
-  if (pa_context_connect(_context, NULL, PA_CONTEXT_NOAUTOSPAWN, NULL) < 0)
-    throw std::runtime_error(fmt::format("pa_context_connect() failed: {}",
-      pa_strerror(pa_context_errno(_context))));
-  pa_context_set_state_callback(_context, _contextStateCb, this);
-  if (pa_threaded_mainloop_start(_mainloop) < 0)
+  }
+  if (pa_context_connect(context_, nullptr, PA_CONTEXT_NOAUTOSPAWN,
+    nullptr) < 0) {
+    auto err = fmt::format("pa_context_connect() failed: {}",
+      pa_strerror(pa_context_errno(context_)));
+    throw std::runtime_error(err);
+  }
+  pa_context_set_state_callback(context_, contextStateCb, this);
+  if (pa_threaded_mainloop_start(mainloop_) < 0) {
     throw std::runtime_error("pa_mainloop_run() failed.");
-  pa_threaded_mainloop_unlock(_mainloop);
+  }
+  pa_threaded_mainloop_unlock(mainloop_);
 };
 
-void waybar::modules::Pulseaudio::_contextStateCb(pa_context *c, void *data)
+void waybar::modules::Pulseaudio::contextStateCb(pa_context *c, void *data)
 {
   auto pa = static_cast<waybar::modules::Pulseaudio *>(data);
   switch (pa_context_get_state(c)) {
     case PA_CONTEXT_TERMINATED:
-      pa->_mainloop_api->quit(pa->_mainloop_api, 0);
+      pa->mainloop_api_->quit(pa->mainloop_api_, 0);
       break;
     case PA_CONTEXT_READY:
-      pa_context_get_server_info(c, _serverInfoCb, data);
-      pa_context_set_subscribe_callback(c, _subscribeCb, data);
-      pa_context_subscribe(c, PA_SUBSCRIPTION_MASK_SINK, nullptr,
-        nullptr);
+      pa_context_get_server_info(c, serverInfoCb, data);
+      pa_context_set_subscribe_callback(c, subscribeCb, data);
+      pa_context_subscribe(c, PA_SUBSCRIPTION_MASK_SINK, nullptr, nullptr);
       break;
     case PA_CONTEXT_CONNECTING:
     case PA_CONTEXT_AUTHORIZING:
@@ -41,7 +46,7 @@ void waybar::modules::Pulseaudio::_contextStateCb(pa_context *c, void *data)
       break;
     case PA_CONTEXT_FAILED:
     default:
-      pa->_mainloop_api->quit(pa->_mainloop_api, 1);
+      pa->mainloop_api_->quit(pa->mainloop_api_, 1);
       break;
   }
 }
@@ -49,37 +54,34 @@ void waybar::modules::Pulseaudio::_contextStateCb(pa_context *c, void *data)
 /*
  * Called when an event we subscribed to occurs.
  */
-void waybar::modules::Pulseaudio::_subscribeCb(pa_context *context,
-  pa_subscription_event_type_t type, uint32_t idx, void *data)
+void waybar::modules::Pulseaudio::subscribeCb(pa_context* context,
+  pa_subscription_event_type_t type, uint32_t idx, void* data)
 {
   unsigned facility = type & PA_SUBSCRIPTION_EVENT_FACILITY_MASK;
-  pa_operation *op = nullptr;
 
   switch (facility) {
-      case PA_SUBSCRIPTION_EVENT_SINK:
-          pa_context_get_sink_info_by_index(context, idx, _sinkInfoCb, data);
-          break;
-      default:
-          assert(0);
-          break;
+    case PA_SUBSCRIPTION_EVENT_SINK:
+        pa_context_get_sink_info_by_index(context, idx, sinkInfoCb, data);
+        break;
+    default:
+        break;
   }
-  if (op)
-    pa_operation_unref(op);
 }
 
 /*
  * Called when the requested sink information is ready.
  */
-void waybar::modules::Pulseaudio::_sinkInfoCb(pa_context *context,
-  const pa_sink_info *i, int eol, void *data)
+void waybar::modules::Pulseaudio::sinkInfoCb(pa_context* /*context*/,
+  const pa_sink_info* i, int /*eol*/, void* data)
 {
-  if (i) {
+  if (i != nullptr) {
     auto pa = static_cast<waybar::modules::Pulseaudio *>(data);
-    float volume = (float)pa_cvolume_avg(&(i->volume)) / (float)PA_VOLUME_NORM;
-    pa->_sinkIdx = i->index;
-    pa->_volume = volume * 100.0f;
-    pa->_muted = i->mute;
-    pa->_desc = i->description;
+    float volume = static_cast<float>(pa_cvolume_avg(&(i->volume)))
+      / float{PA_VOLUME_NORM};
+    pa->sink_idx_ = i->index;
+    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));
   }
 }
@@ -88,26 +90,40 @@ void waybar::modules::Pulseaudio::_sinkInfoCb(pa_context *context,
  * Called when the requested information on the server is ready. This is
  * used to find the default PulseAudio sink.
  */
-void waybar::modules::Pulseaudio::_serverInfoCb(pa_context *context,
+void waybar::modules::Pulseaudio::serverInfoCb(pa_context *context,
   const pa_server_info *i, void *data)
 {
-    pa_context_get_sink_info_by_name(context, i->default_sink_name, _sinkInfoCb,
-      data);
+    pa_context_get_sink_info_by_name(context, i->default_sink_name,
+      sinkInfoCb, data);
 }
 
 auto waybar::modules::Pulseaudio::update() -> void
 {
-	  auto format = _config["format"] ? _config["format"].asString() : "{}%";
-    if (_muted) {
+	  auto format =
+      config_["format"] ? config_["format"].asString() : "{volume}%";
+    if (muted_) {
       format =
-        _config["format-muted"] ? _config["format-muted"].asString() : format;
-      _label.get_style_context()->add_class("muted");
-    } else
-      _label.get_style_context()->remove_class("muted");
-    _label.set_label(fmt::format(format, _volume));
-    _label.set_tooltip_text(_desc);
+        config_["format-muted"] ? config_["format-muted"].asString() : format;
+      label_.get_style_context()->add_class("muted");
+    } else {
+      label_.get_style_context()->remove_class("muted");
+    }
+    label_.set_label(fmt::format(format,
+      fmt::arg("volume", volume_),
+      fmt::arg("icon", getIcon(volume_))));
+    label_.set_tooltip_text(desc_);
+}
+
+std::string waybar::modules::Pulseaudio::getIcon(uint16_t percentage)
+{
+  if (!config_["format-icons"] || !config_["format-icons"].isArray()) {
+    return "";
+  }
+  auto size = config_["format-icons"].size();
+  auto idx = std::clamp(percentage / (100 / size), 0U, size - 1);
+  return config_["format-icons"][idx].asString();
 }
 
 waybar::modules::Pulseaudio::operator Gtk::Widget &() {
-  return _label;
+  return label_;
 }

src/modules/sway/ipc/client.cpp

@@ -0,0 +1,99 @@
+#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 char ipc_magic[] = {'i', '3', '-', 'i', 'p', 'c'};
+static const size_t ipc_header_size = sizeof(ipc_magic)+8;
+
+std::string getSocketPath() {
+  const char *env = getenv("SWAYSOCK");
+  if (env != nullptr) {
+    return std::string(env);
+  }
+  std::string str;
+  {
+    std::string str_buf;
+    FILE*  in;
+    char  buf[512] = { 0 };
+    if ((in = popen("sway --get-socketpath 2>/dev/null", "r")) == nullptr) {
+      throw std::runtime_error("Failed to get socket path");
+    }
+    while (fgets(buf, sizeof(buf), in) != nullptr) {
+      str_buf.append(buf, sizeof(buf));
+    }
+    pclose(in);
+    str = str_buf;
+  }
+  if (str.back() == '\n') {
+    str.pop_back();
+  }
+  return str;
+}
+
+int ipcOpenSocket(const std::string &socketPath) {
+  struct sockaddr_un addr = {};
+  int socketfd;
+  if ((socketfd = 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) {
+    throw std::runtime_error("Unable to connect to " + socketPath);
+  }
+  return socketfd;
+}
+
+struct ipc_response ipcRecvResponse(int socketfd) {
+  struct ipc_response response;
+  char data[ipc_header_size];
+  auto data32 = reinterpret_cast<uint32_t *>(data + sizeof(ipc_magic));
+  size_t total = 0;
+
+  while (total < ipc_header_size) {
+    ssize_t received = recv(socketfd, data + total, ipc_header_size - total, 0);
+    if (received <= 0) {
+      throw std::runtime_error("Unable to receive IPC response");
+    }
+    total += received;
+  }
+
+  total = 0;
+  response.size = data32[0];
+  response.type = data32[1];
+  char payload[response.size + 1];
+
+  while (total < response.size) {
+    ssize_t received = recv(socketfd, payload + total, response.size - total, 0);
+    if (received < 0) {
+      throw std::runtime_error("Unable to receive IPC response");
+    }
+    total += received;
+  }
+  payload[response.size] = '\0';
+  response.payload = std::string(payload);
+  return response;
+}
+
+std::string ipcSingleCommand(int socketfd, uint32_t type, const char *payload, uint32_t *len) {
+  char data[ipc_header_size];
+  auto data32 = reinterpret_cast<uint32_t *>(data + sizeof(ipc_magic));
+  memcpy(data, ipc_magic, sizeof(ipc_magic));
+  data32[0] = *len;
+  data32[1] = type;
+
+  if (send(socketfd, data, ipc_header_size, 0) == -1) {
+    throw std::runtime_error("Unable to send IPC header");
+  }
+  if (send(socketfd, payload, *len, 0) == -1) {
+    throw std::runtime_error("Unable to send IPC payload");
+  }
+  struct ipc_response resp = ipcRecvResponse(socketfd);
+  *len = resp.size;
+  return resp.payload;
+}

src/modules/sway/window.cpp

@@ -0,0 +1,65 @@
+#include "modules/sway/window.hpp"
+#include "modules/sway/ipc/client.hpp"
+
+waybar::modules::sway::Window::Window(Bar &bar, Json::Value config)
+  : bar_(bar), config_(std::move(config))
+{
+  label_.set_name("window");
+  std::string socketPath = getSocketPath();
+  ipcfd_ = ipcOpenSocket(socketPath);
+  ipc_eventfd_ = ipcOpenSocket(socketPath);
+  const char *subscribe = "[ \"window\" ]";
+  uint32_t len = strlen(subscribe);
+  ipcSingleCommand(ipc_eventfd_, IPC_SUBSCRIBE, subscribe, &len);
+  getFocusedWindow();
+  thread_ = [this] {
+    try {
+      auto res = ipcRecvResponse(ipc_eventfd_);
+      auto parsed = parser_.parse(res.payload);
+      if ((parsed["change"] == "focus" || parsed["change"] == "title")
+        && parsed["container"]["focused"].asBool()) {
+        window_ = parsed["container"]["name"].asString();
+        Glib::signal_idle().connect_once(sigc::mem_fun(*this, &Window::update));
+      }
+    } catch (const std::exception& e) {
+      std::cerr << e.what() << std::endl;
+    }
+  };
+}
+
+auto waybar::modules::sway::Window::update() -> void
+{
+  label_.set_text(window_);
+  label_.set_tooltip_text(window_);
+}
+
+std::string waybar::modules::sway::Window::getFocusedNode(Json::Value nodes)
+{
+  for (auto &node : nodes) {
+    if (node["focused"].asBool()) {
+      return node["name"].asString();
+    }
+    auto res = getFocusedNode(node["nodes"]);
+    if (!res.empty()) {
+      return res;
+    }
+  }
+  return std::string();
+}
+
+void waybar::modules::sway::Window::getFocusedWindow()
+{
+  try {
+    uint32_t len = 0;
+    auto res = ipcSingleCommand(ipcfd_, IPC_GET_TREE, nullptr, &len);
+    auto parsed = parser_.parse(res);
+    window_ = getFocusedNode(parsed["nodes"]);
+    Glib::signal_idle().connect_once(sigc::mem_fun(*this, &Window::update));
+  } catch (const std::exception &e) {
+    std::cerr << e.what() << std::endl;
+  }
+}
+
+waybar::modules::sway::Window::operator Gtk::Widget &() {
+  return label_;
+}

src/modules/sway/workspaces.cpp

@@ -0,0 +1,211 @@
+#include "modules/sway/workspaces.hpp"
+#include "modules/sway/ipc/client.hpp"
+
+waybar::modules::sway::Workspaces::Workspaces(Bar &bar, Json::Value config)
+  : bar_(bar), config_(std::move(config)), scrolling_(false)
+{
+  box_.set_name("workspaces");
+  std::string socketPath = getSocketPath();
+  ipcfd_ = ipcOpenSocket(socketPath);
+  ipc_eventfd_ = ipcOpenSocket(socketPath);
+  const char *subscribe = "[ \"workspace\" ]";
+  uint32_t len = strlen(subscribe);
+  ipcSingleCommand(ipc_eventfd_, IPC_SUBSCRIBE, subscribe, &len);
+  thread_ = [this] {
+    try {
+      // Wait for the name of the output
+      if (!config_["all-outputs"].asBool() && bar_.outputName.empty()) {
+        while (bar_.outputName.empty()) {
+          thread_.sleep_for(chrono::milliseconds(150));
+        }
+      } else if (!workspaces_.empty()) {
+        ipcRecvResponse(ipc_eventfd_);
+      }
+      uint32_t len = 0;
+      std::lock_guard<std::mutex> lock(mutex_);
+      auto str = ipcSingleCommand(ipcfd_, IPC_GET_WORKSPACES, nullptr, &len);
+      workspaces_ = parser_.parse(str);
+      Glib::signal_idle()
+        .connect_once(sigc::mem_fun(*this, &Workspaces::update));
+    } catch (const std::exception& e) {
+      std::cerr << e.what() << std::endl;
+    }
+  };
+}
+
+auto waybar::modules::sway::Workspaces::update() -> void
+{
+  std::lock_guard<std::mutex> lock(mutex_);
+  bool needReorder = false;
+  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; });
+    if (ws == workspaces_.end()) {
+      it = buttons_.erase(it);
+      needReorder = true;
+    } else {
+      ++it;
+    }
+  }
+  for (auto node : workspaces_) {
+    if (!config_["all-outputs"].asBool()
+      && bar_.outputName != node["output"].asString()) {
+      continue;
+    }
+    auto it = buttons_.find(node["num"].asInt());
+    if (it == buttons_.end()) {
+      addWorkspace(node);
+      needReorder = true;
+    } else {
+      auto &button = it->second;
+      if (node["focused"].asBool()) {
+        button.get_style_context()->add_class("focused");
+      } else {
+        button.get_style_context()->remove_class("focused");
+      }
+      if (node["visible"].asBool()) {
+        button.get_style_context()->add_class("visible");
+      } else {
+        button.get_style_context()->remove_class("visible");
+      }
+      if (node["urgent"].asBool()) {
+        button.get_style_context()->add_class("urgent");
+      } else {
+        button.get_style_context()->remove_class("urgent");
+      }
+      if (needReorder) {
+        box_.reorder_child(button, node["num"].asInt());
+      }
+      button.show();
+    }
+  }
+  if (scrolling_) {
+    scrolling_ = false;
+  }
+}
+
+void waybar::modules::sway::Workspaces::addWorkspace(Json::Value node)
+{
+  auto icon = getIcon(node["name"].asString());
+  auto pair = buttons_.emplace(node["num"].asInt(), icon);
+  auto &button = pair.first->second;
+  if (icon != node["name"].asString()) {
+    button.get_style_context()->add_class("icon");
+  }
+  box_.pack_start(button, false, false, 0);
+  button.set_relief(Gtk::RELIEF_NONE);
+  button.signal_clicked().connect([this, pair] {
+    try {
+      std::lock_guard<std::mutex> lock(mutex_);
+      auto value = fmt::format("workspace \"{}\"", pair.first->first);
+      uint32_t size = value.size();
+      ipcSingleCommand(ipcfd_, IPC_COMMAND, value.c_str(), &size);
+    } catch (const std::exception& e) {
+      std::cerr << e.what() << std::endl;
+    }
+  });
+  button.add_events(Gdk::SCROLL_MASK | Gdk::SMOOTH_SCROLL_MASK);
+  if (!config_["disable-scroll"].asBool()) {
+    button.signal_scroll_event()
+      .connect(sigc::mem_fun(*this, &Workspaces::handleScroll));
+  }
+  box_.reorder_child(button, node["num"].asInt());
+  if (node["focused"].asBool()) {
+    button.get_style_context()->add_class("focused");
+  }
+  if (node["visible"].asBool()) {
+    button.get_style_context()->add_class("visible");
+  }
+  if (node["urgent"].asBool()) {
+    button.get_style_context()->add_class("urgent");
+  }
+  button.show();
+}
+
+std::string waybar::modules::sway::Workspaces::getIcon(std::string name)
+{
+  if (config_["format-icons"][name]) {
+    return config_["format-icons"][name].asString();
+  }
+  if (config_["format-icons"]["default"]) {
+    return config_["format-icons"]["default"].asString();
+  }
+  return name;
+}
+
+bool waybar::modules::sway::Workspaces::handleScroll(GdkEventScroll *e)
+{
+  std::lock_guard<std::mutex> lock(mutex_);
+  // Avoid concurrent scroll event
+  if (scrolling_) {
+    return false;
+  }
+  scrolling_ = true;
+  int id = -1;
+  uint16_t idx = 0;
+  for (; idx < workspaces_.size(); idx += 1) {
+    if (workspaces_[idx]["focused"].asBool()) {
+      id = workspaces_[idx]["num"].asInt();
+      break;
+    }
+  }
+  if (id == -1) {
+    scrolling_ = false;
+    return false;
+  }
+  if (e->direction == GDK_SCROLL_UP) {
+      id = getNextWorkspace();
+  }
+  if (e->direction == GDK_SCROLL_DOWN) {
+      id = getPrevWorkspace();
+  }
+  if (e->direction == GDK_SCROLL_SMOOTH) {
+    gdouble delta_x, delta_y;
+    gdk_event_get_scroll_deltas(reinterpret_cast<const GdkEvent *>(e),
+      &delta_x, &delta_y);
+    if (delta_y < 0) {
+      id = getNextWorkspace();
+    } else if (delta_y > 0) {
+      id = getPrevWorkspace();
+    }
+  }
+  if (id == workspaces_[idx]["num"].asInt()) {
+    scrolling_ = false;
+    return false;
+  }
+  auto value = fmt::format("workspace \"{}\"", id);
+  uint32_t size = value.size();
+  ipcSingleCommand(ipcfd_, IPC_COMMAND, value.c_str(), &size);
+  std::this_thread::sleep_for(std::chrono::milliseconds(150));
+  return true;
+}
+
+int waybar::modules::sway::Workspaces::getPrevWorkspace()
+{
+  for (uint16_t i = 0; i != workspaces_.size(); i += 1) {
+    if (workspaces_[i]["focused"].asBool()) {
+      if (i > 0) {
+        return workspaces_[i - 1]["num"].asInt();
+      }
+      return workspaces_[workspaces_.size() - 1]["num"].asInt();
+    }
+  }
+  return -1;
+}
+
+int waybar::modules::sway::Workspaces::getNextWorkspace()
+{
+  for (uint16_t i = 0; i != workspaces_.size(); i += 1) {
+    if (workspaces_[i]["focused"].asBool()) {
+      if (i + 1U < workspaces_.size()) {
+        return workspaces_[i + 1]["num"].asInt();
+      }
+      return workspaces_[0]["num"].asInt();
+    }
+  }
+  return -1;
+}
+
+waybar::modules::sway::Workspaces::operator Gtk::Widget &() {
+  return box_;
+}

src/modules/workspaces.cpp

@@ -1,106 +0,0 @@
-#include "modules/workspaces.hpp"
-#include "ipc/client.hpp"
-
-waybar::modules::Workspaces::Workspaces(Bar &bar)
-  : _bar(bar)
-{
-  _box.get_style_context()->add_class("workspaces");
-  try {
-    std::string socketPath = get_socketpath();
-    _ipcSocketfd = ipc_open_socket(socketPath);
-    _ipcEventSocketfd = ipc_open_socket(socketPath);
-    const char *subscribe = "[ \"workspace\", \"mode\" ]";
-    uint32_t len = strlen(subscribe);
-    ipc_single_command(_ipcEventSocketfd, IPC_SUBSCRIBE, subscribe, &len);
-  } catch (const std::exception& e) {
-    std::cerr << e.what() << std::endl;
-    return;
-  }
-  _thread = [this] {
-    Glib::signal_idle().connect_once(sigc::mem_fun(*this, &Workspaces::update));
-    _thread.sleep_for(chrono::milliseconds(250));
-  };
-}
-
-
-auto waybar::modules::Workspaces::update() -> void
-{
-  if (_bar.outputName.empty()) return;
-  Json::Value workspaces = _getWorkspaces();
-  bool needReorder = false;
-  for (auto it = _buttons.begin(); it != _buttons.end(); ++it) {
-    auto ws = std::find_if(workspaces.begin(), workspaces.end(),
-      [it](auto node) -> bool { return node["num"].asInt() == it->first; });
-    if (ws == workspaces.end()) {
-      it = _buttons.erase(it);
-      needReorder = true;
-    }
-  }
-  for (auto node : workspaces) {
-    auto it = _buttons.find(node["num"].asInt());
-    if (it == _buttons.end() && _bar.outputName == node["output"].asString()) {
-      _addWorkspace(node);
-      needReorder = true;
-    } else {
-      auto styleContext = it->second.get_style_context();
-      bool isCurrent = node["focused"].asBool();
-      if (!isCurrent) {
-        styleContext->remove_class("current");
-      } else if (isCurrent) {
-        styleContext->add_class("current");
-      }
-      if (needReorder)
-        _box.reorder_child(it->second, node["num"].asInt() - 1);
-      it->second.show();
-    }
-  }
-}
-
-void waybar::modules::Workspaces::_addWorkspace(Json::Value node)
-{
-  auto pair = _buttons.emplace(node["num"].asInt(), node["name"].asString());
-  auto &button = pair.first->second;
-  _box.pack_start(button, false, false, 0);
-  button.set_relief(Gtk::RELIEF_NONE);
-  button.signal_clicked().connect([this, pair] {
-    try {
-      auto value = fmt::format("workspace \"{}\"", pair.first->first);
-      uint32_t size = value.size();
-      ipc_single_command(_ipcSocketfd, IPC_COMMAND, value.c_str(), &size);
-    } catch (const std::exception& e) {
-      std::cerr << e.what() << std::endl;
-    }
-  });
-  _box.reorder_child(button, node["num"].asInt() - 1);
-  if (node["focused"].asBool()) {
-    button.get_style_context()->add_class("current");
-  }
-  button.show();
-}
-
-Json::Value waybar::modules::Workspaces::_getWorkspaces()
-{
-  uint32_t len = 0;
-  Json::Value root;
-  Json::CharReaderBuilder builder;
-  Json::CharReader* reader = builder.newCharReader();
-  try {
-    std::string str = ipc_single_command(_ipcSocketfd, IPC_GET_WORKSPACES,
-      nullptr, &len);
-    std::string err;
-    bool res =
-      reader->parse(str.c_str(), str.c_str() + str.size(), &root, &err);
-    delete reader;
-    if (!res) {
-      std::cerr << err << std::endl;
-      return root;
-    }
-  } catch (const std::exception& e) {
-    std::cerr << e.what() << std::endl;
-  }
-  return root;
-}
-
-waybar::modules::Workspaces::operator Gtk::Widget &() {
-  return _box;
-}