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

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