Fix thread safety in Hyprland modules to prevent corrupted double-linked list crash

- Move GTK operations from IPC thread to GTK main thread in Window module
- Move GTK operations from IPC thread to GTK main thread in WindowCount module
- Move GTK style class operations from IPC thread to GTK main thread in Submap module
- Language and Workspaces modules already safe (only update internal state)

Co-authored-by: Alexays <13947260+Alexays@users.noreply.github.com>

include/modules/hyprland/submap.hpp

@@ -26,6 +26,7 @@ class Submap : public waybar::ALabel, public EventHandler {
   const Bar& bar_;
   util::JsonParser parser_;
   std::string submap_;
+  std::string prev_submap_;
   bool always_on_ = false;
   std::string default_submap_ = "Default";
 

src/modules/hyprland/submap.cpp

@@ -44,6 +44,17 @@ auto Submap::parseConfig(const Json::Value& config) -> void {
 auto Submap::update() -> void {
   std::lock_guard<std::mutex> lg(mutex_);
 
+  // Handle style class changes
+  if (!prev_submap_.empty()) {
+    label_.get_style_context()->remove_class(prev_submap_);
+  }
+
+  if (!submap_.empty()) {
+    label_.get_style_context()->add_class(submap_);
+  }
+
+  prev_submap_ = submap_;
+
   if (submap_.empty()) {
     event_box_.hide();
   } else {
@@ -66,18 +77,12 @@ void Submap::onEvent(const std::string& ev) {
 
   auto submapName = ev.substr(ev.find_first_of('>') + 2);
 
-  if (!submap_.empty()) {
-    label_.get_style_context()->remove_class(submap_);
-  }
-
   submap_ = submapName;
 
   if (submap_.empty() && always_on_) {
     submap_ = default_submap_;
   }
 
-  label_.get_style_context()->add_class(submap_);
-
   spdlog::debug("hyprland submap onevent with {}", submap_);
 
   dp.emit();

src/modules/hyprland/window.cpp

@@ -45,6 +45,8 @@ Window::~Window() {
 auto Window::update() -> void {
   std::shared_lock<std::shared_mutex> windowIpcShareLock(windowIpcSmtx);
 
+  queryActiveWorkspace();
+
   std::string windowName = waybar::util::sanitize_string(workspace_.last_window_title);
   std::string windowAddress = workspace_.last_window;
 
@@ -236,8 +238,6 @@ void Window::queryActiveWorkspace() {
 }
 
 void Window::onEvent(const std::string& ev) {
-  queryActiveWorkspace();
-
   dp.emit();
 }
 

src/modules/hyprland/windowcount.cpp

@@ -37,7 +37,7 @@ WindowCount::~WindowCount() {
 }
 
 auto WindowCount::update() -> void {
-  std::lock_guard<std::mutex> lg(mutex_);
+  queryActiveWorkspace();
 
   std::string format = config_["format"].asString();
   std::string formatEmpty = config_["format-empty"].asString();
@@ -126,7 +126,6 @@ void WindowCount::queryActiveWorkspace() {
 }
 
 void WindowCount::onEvent(const std::string& ev) {
-  queryActiveWorkspace();
   dp.emit();
 }