feature: created sway language submodule; added styles & config part for a sway language submodule

include/factory.hpp

@@ -6,6 +6,7 @@
 #include "modules/sway/mode.hpp"
 #include "modules/sway/window.hpp"
 #include "modules/sway/workspaces.hpp"
+#include "modules/sway/language.hpp"
 #endif
 #ifdef HAVE_WLR
 #include "modules/wlr/taskbar.hpp"

include/modules/sway/language.hpp

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <fmt/format.h>
+#include "ALabel.hpp"
+#include "bar.hpp"
+#include "client.hpp"
+#include "modules/sway/ipc/client.hpp"
+#include "util/json.hpp"
+
+namespace waybar::modules::sway {
+
+class Language : public ALabel, public sigc::trackable {
+ public:
+  Language(const std::string& id, const Json::Value& config);
+  ~Language() = default;
+  auto update() -> void;
+
+ private:
+  void onEvent(const struct Ipc::ipc_response&);
+  void onCmd(const struct Ipc::ipc_response&);
+  
+  std::string      lang_;
+  util::JsonParser parser_;
+  std::mutex       mutex_;
+  Ipc              ipc_;
+};
+
+}  // namespace waybar::modules::sway

meson.build

@@ -172,6 +172,7 @@ add_project_arguments('-DHAVE_SWAY', language: 'cpp')
 src_files += [
     'src/modules/sway/ipc/client.cpp',
     'src/modules/sway/mode.cpp',
+    'src/modules/sway/language.cpp',
     'src/modules/sway/window.cpp',
     'src/modules/sway/workspaces.cpp'
 ]

resources/config

@@ -6,7 +6,7 @@
     // Choose the order of the modules
     "modules-left": ["sway/workspaces", "sway/mode", "custom/media"],
     "modules-center": ["sway/window"],
-    "modules-right": ["mpd", "idle_inhibitor", "pulseaudio", "network", "cpu", "memory", "temperature", "backlight", "battery", "battery#bat2", "clock", "tray"],
+    "modules-right": ["mpd", "idle_inhibitor", "pulseaudio", "network", "cpu", "memory", "temperature", "backlight", "sway/language", "battery", "battery#bat2", "clock", "tray"],
     // Modules configuration
     // "sway/workspaces": {
     //     "disable-scroll": true,

resources/style.css

@@ -200,3 +200,11 @@ label:focus {
 #mpd.paused {
     background-color: #51a37a;
 }
+
+#language {
+    background: #00b093;
+    color: #740864;
+    padding: 0 5px;
+    margin: 0 5px;
+    min-width: 16px;
+}

src/factory.cpp

@@ -22,6 +22,9 @@ waybar::AModule* waybar::Factory::makeModule(const std::string& name) const {
     if (ref == "sway/window") {
       return new waybar::modules::sway::Window(id, bar_, config_[name]);
     }
+    if (ref == "sway/language") {
+        return new waybar::modules::sway::Language(id, config_[name]);
+    }
 #endif
 #ifdef HAVE_WLR
     if (ref == "wlr/taskbar") {

src/modules/sway/language.cpp

@@ -0,0 +1,70 @@
+#include "modules/sway/language.hpp"
+#include <spdlog/spdlog.h>
+
+namespace waybar::modules::sway {
+
+Language::Language(const std::string& id, const Json::Value& config)
+    : ALabel(config, "language", id, "{}", 0, true) {
+  ipc_.subscribe(R"(["input"])");
+  ipc_.signal_event.connect(sigc::mem_fun(*this, &Language::onEvent));
+  ipc_.signal_cmd.connect(sigc::mem_fun(*this, &Language::onCmd));
+  ipc_.sendCmd(IPC_GET_INPUTS);
+  // Launch worker
+  ipc_.setWorker([this] {
+    try {
+      ipc_.handleEvent();
+    } catch (const std::exception& e) {
+      spdlog::error("Language: {}", e.what());
+    }
+  });
+  dp.emit();
+}
+
+void Language::onCmd(const struct Ipc::ipc_response& res) {
+  try {
+    auto payload = parser_.parse(res.payload);
+    //Display current layout of a device with a maximum count of layouts, expecting that all will be OK
+    Json::Value::ArrayIndex maxId = 0, max = 0;
+    for(Json::Value::ArrayIndex i = 0; i < payload.size(); i++) {
+      if(payload[i]["xkb_layout_names"].size() > max) {
+        max = payload[i]["xkb_layout_names"].size();
+        maxId = i;
+      }
+    }
+    auto layout_name = payload[maxId]["xkb_active_layout_name"].asString().substr(0,2);
+    lang_ = Glib::Markup::escape_text(layout_name);
+    dp.emit();
+  } catch (const std::exception& e) {
+    spdlog::error("Language: {}", e.what());
+  }
+}
+
+void Language::onEvent(const struct Ipc::ipc_response& res) {
+  try {
+    std::lock_guard<std::mutex> lock(mutex_);
+    auto payload = parser_.parse(res.payload)["input"];
+    if (payload["type"].asString() == "keyboard") {
+        auto layout_name = payload["xkb_active_layout_name"].asString().substr(0,2);
+        lang_ = Glib::Markup::escape_text(layout_name);
+    }
+    dp.emit();
+  } catch (const std::exception& e) {
+    spdlog::error("Language: {}", e.what());
+  }
+}
+
+auto Language::update() -> void {
+  if (lang_.empty()) {
+    event_box_.hide();
+  } else {
+    label_.set_markup(fmt::format(format_, lang_));
+    if (tooltipEnabled()) {
+      label_.set_tooltip_text(lang_);
+    }
+    event_box_.show();
+  }
+  // Call parent update
+  ALabel::update();
+}
+
+}  // namespace waybar::modules::sway