Idempotent bar show/hide via configurable user kill signals

src/bar.cpp

@@ -8,6 +8,8 @@
 #include "client.hpp"
 #include "factory.hpp"
 #include "group.hpp"
+#include "util/enum.hpp"
+#include "util/kill_signal.hpp"
 
 #ifdef HAVE_SWAY
 #include "modules/sway/bar.hpp"
@@ -277,6 +279,30 @@ waybar::Bar::Bar(struct waybar_output* w_output, const Json::Value& w_config)
   }
 #endif
 
+  waybar::util::EnumParser<util::KillSignalAction> m_signalActionEnumParser;
+  const auto& configSigusr1 = config["on_sigusr1"];
+  if (configSigusr1.isString()) {
+    auto strSigusr1 = configSigusr1.asString();
+    try {
+      onSigusr1 =
+          m_signalActionEnumParser.parseStringToEnum(strSigusr1, util::userKillSignalActions);
+    } catch (const std::invalid_argument& e) {
+      onSigusr1 = util::SIGNALACTION_DEFAULT_SIGUSR1;
+      spdlog::warn("Invalid string representation for on_sigusr1. Falling back to default mode.");
+    }
+  }
+  const auto& configSigusr2 = config["on_sigusr2"];
+  if (configSigusr2.isString()) {
+    auto strSigusr2 = configSigusr2.asString();
+    try {
+      onSigusr2 =
+          m_signalActionEnumParser.parseStringToEnum(strSigusr2, util::userKillSignalActions);
+    } catch (const std::invalid_argument& e) {
+      onSigusr2 = util::SIGNALACTION_DEFAULT_SIGUSR2;
+      spdlog::warn("Invalid string representation for on_sigusr2. Falling back to default mode.");
+    }
+  }
+
   setupWidgets();
   window.show_all();
 
@@ -422,6 +448,8 @@ void waybar::Bar::setVisible(bool value) {
 }
 
 void waybar::Bar::toggle() { setVisible(!visible); }
+void waybar::Bar::show() { setVisible(true); }
+void waybar::Bar::hide() { setVisible(false); }
 
 // Converting string to button code rn as to avoid doing it later
 void waybar::Bar::setupAltFormatKeyForModule(const std::string& module_name) {
@@ -479,6 +507,9 @@ void waybar::Bar::handleSignal(int signal) {
   }
 }
 
+waybar::util::KillSignalAction waybar::Bar::getOnSigusr1Action() { return this->onSigusr1; }
+waybar::util::KillSignalAction waybar::Bar::getOnSigusr2Action() { return this->onSigusr2; }
+
 void waybar::Bar::getModules(const Factory& factory, const std::string& pos,
                              waybar::Group* group = nullptr) {
   auto module_list = group != nullptr ? config[pos]["modules"] : config[pos];