Initial implementation of active window

TODO:
- Sometimes the active event arrives before the create, in which case the window is not activated.
- The window title event also looks unreliable in some cases, will need to investigate

src/modules/hyprland/workspaces.cpp

@@ -341,6 +341,8 @@ void Workspaces::onEvent(const std::string &ev) {
     onWorkspaceRenamed(payload);
   } else if (eventName == "windowtitlev2") {
     onWindowTitleEvent(payload);
+  } else if (eventName == "activewindowv2") {
+    onActiveWindowChanged(payload);
   } else if (eventName == "configreloaded") {
     onConfigReloaded();
   }
@@ -561,9 +563,10 @@ void Workspaces::onWindowTitleEvent(std::string const &payload) {
         (*windowWorkspace)->insertWindow(std::move(wcp));
       };
     } else {
-      auto queuedWindow = std::ranges::find_if(m_windowsToCreate, [payload](auto &windowPayload) {
-        return windowPayload.getAddress() == payload;
-      });
+      auto queuedWindow =
+          std::ranges::find_if(m_windowsToCreate, [&windowAddress](auto &windowPayload) {
+            return windowPayload.getAddress() == windowAddress;
+          });
 
       // If the window was queued, rename it in the queue
       if (queuedWindow != m_windowsToCreate.end()) {
@@ -586,6 +589,28 @@ void Workspaces::onWindowTitleEvent(std::string const &payload) {
   }
 }
 
+void Workspaces::onActiveWindowChanged(WindowAddress const &activeWindowAddress) {
+  spdlog::trace("Active window changed: {}", activeWindowAddress);
+
+  for (auto &[address, window] : m_orphanWindowMap) {
+    if (address == activeWindowAddress) {
+      window.setActive(true);
+    } else {
+      window.setActive(false);
+    }
+  }
+  for (auto const &workspace : m_workspaces) {
+    workspace->setActiveWindow(activeWindowAddress);
+  }
+  for (auto &window : m_windowsToCreate) {
+    if (window.getAddress() == activeWindowAddress) {
+      window.setActive(true);
+    } else {
+      window.setActive(false);
+    }
+  }
+}
+
 void Workspaces::onConfigReloaded() {
   spdlog::info("Hyprland config reloaded, reinitializing hyprland/workspaces module...");
   init();
@@ -701,6 +726,7 @@ auto Workspaces::populateWorkspaceTaskbarConfig(const Json::Value &config) -> vo
   }
 
   populateBoolConfig(workspaceTaskbar, "enable", m_enableTaskbar);
+  populateBoolConfig(workspaceTaskbar, "update-active-window", m_updateActiveWindow);
 
   if (workspaceTaskbar["format"].isString()) {
     /* The user defined a format string, use it */
@@ -765,6 +791,12 @@ auto Workspaces::registerIpc() -> void {
         "rewrite rule uses the 'title' field.");
     m_ipc.registerForIPC("windowtitlev2", this);
   }
+  if (m_updateActiveWindow) {
+    spdlog::info(
+        "Registering for Hyprland's 'activewindowv2' events because 'update-active-window' is set "
+        "to true.");
+    m_ipc.registerForIPC("activewindowv2", this);
+  }
 }
 
 void Workspaces::removeWorkspacesToRemove() {