helpers: Add new C++ Signal and Listener classes

A memory-safe alternative to wl_signal

1 files changed, 22 insertions, 0 deletions

diff --git a/src/helpers/signal/Signal.cpp b/src/helpers/signal/Signal.cpp
new file mode 100644
index 00000000..a8adc275
--- /dev/null
+++ b/src/helpers/signal/Signal.cpp
@@ -0,0 +1,22 @@
+#include "Signal.hpp"
+#include <algorithm>
+
+void CSignal::emit(std::any data) {
+    bool dirty = false;
+
+    for (auto& l : m_vListeners) {
+        if (const CHyprSignalListener L = l.lock())
+            L->emit(data);
+        else
+            dirty = true;
+    }
+
+    if (dirty)
+        std::erase_if(m_vListeners, [](const auto& other) { return !other.lock(); });
+}
+
+CHyprSignalListener CSignal::registerListener(std::function<void(std::any)> handler) {
+    CHyprSignalListener listener = std::make_shared<CSignalListener>(handler);
+    m_vListeners.emplace_back(std::weak_ptr<CSignalListener>(listener));
+    return listener;
+}