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

include/modules/hyprland/windowcreationpayload.hpp

@@ -31,9 +31,11 @@ struct WindowRepr {
   std::string window_class;
   std::string window_title;
   std::string repr_rewrite;
+  bool isActive = false;
 
  public:
   bool empty() const { return address.empty(); }
+  void setActive(bool value) { isActive = value; }
 };
 
 class WindowCreationPayload {
@@ -48,6 +50,7 @@ class WindowCreationPayload {
   bool isEmpty(Workspaces& workspace_manager);
   bool reprIsReady() const { return std::holds_alternative<Repr>(m_window); }
   WindowRepr repr(Workspaces& workspace_manager);
+  void setActive(bool value) { m_isActive = value; }
 
   std::string getWorkspaceName() const { return m_workspaceName; }
   WindowAddress getAddress() const { return m_windowAddress; }
@@ -64,6 +67,7 @@ class WindowCreationPayload {
 
   WindowAddress m_windowAddress;
   std::string m_workspaceName;
+  bool m_isActive = false;
 
   int m_timeSpentUncreated = 0;
 };

include/modules/hyprland/workspace.hpp

@@ -60,6 +60,7 @@ class Workspace {
   };
   void insertWindow(WindowCreationPayload create_window_paylod);
   void initializeWindowMap(const Json::Value& clients_data);
+  void setActiveWindow(WindowAddress const& addr);
 
   bool onWindowOpened(WindowCreationPayload const& create_window_paylod);
   std::optional<WindowRepr> closeWindow(WindowAddress const& addr);

include/modules/hyprland/workspaces.hpp

@@ -103,6 +103,7 @@ class Workspaces : public AModule, public EventHandler {
   void onWindowMoved(std::string const& payload);
 
   void onWindowTitleEvent(std::string const& payload);
+  void onActiveWindowChanged(WindowAddress const& payload);
 
   void onConfigReloaded();
 
@@ -170,6 +171,7 @@ class Workspaces : public AModule, public EventHandler {
 
   IconLoader m_iconLoader;
   bool m_enableTaskbar = false;
+  bool m_updateActiveWindow = false;
   bool m_taskbarWithIcon = false;
   bool m_taskbarWithTitle = false;
   std::string m_taskbarFormatBefore;

src/modules/hyprland/windowcreationpayload.cpp

@@ -97,9 +97,9 @@ WindowRepr WindowCreationPayload::repr(Workspaces &workspace_manager) {
     return std::get<Repr>(m_window);
   }
   if (std::holds_alternative<ClassAndTitle>(m_window)) {
-    auto [window_class, window_title] = std::get<ClassAndTitle>(m_window);
+    auto const &[window_class, window_title] = std::get<ClassAndTitle>(m_window);
     return {m_windowAddress, window_class, window_title,
-            workspace_manager.getRewrite(window_class, window_title)};
+            workspace_manager.getRewrite(window_class, window_title), m_isActive};
   }
   // Unreachable
   spdlog::error("WorkspaceWindow::repr: Unreachable");

src/modules/hyprland/workspace.cpp

@@ -103,6 +103,16 @@ void Workspace::initializeWindowMap(const Json::Value &clients_data) {
   }
 }
 
+void Workspace::setActiveWindow(WindowAddress const &addr) {
+  for (auto &window : m_windowMap) {
+    if (window.address == addr) {
+      window.setActive(true);
+    } else {
+      window.setActive(false);
+    }
+  }
+}
+
 void Workspace::insertWindow(WindowCreationPayload create_window_paylod) {
   if (!create_window_paylod.isEmpty(m_workspaceManager)) {
     auto repr = create_window_paylod.repr(m_workspaceManager);
@@ -259,6 +269,9 @@ void Workspace::updateTaskbar(const std::string &workspace_icon) {
     auto window_box = Gtk::make_managed<Gtk::Box>(Gtk::ORIENTATION_HORIZONTAL);
     window_box->set_tooltip_text(window_repr.window_title);
     window_box->get_style_context()->add_class("taskbar-window");
+    if (window_repr.isActive) {
+      window_box->get_style_context()->add_class("active");
+    }
     auto event_box = Gtk::manage(new Gtk::EventBox());
     event_box->add(*window_box);
     if (m_workspaceManager.onClickWindow() != "") {

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();
   }
@@ -561,8 +563,9 @@ 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
@@ -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() {