Custom element registration

src/element_registry.hpp

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <RmlUi/Core/ElementInstancer.h>
+#include <RmlUi/Core/Factory.h>
+#include <memory>
+#include <string>
+#include <type_traits>
+#include <vector>
+
+class ElementRegistry {
+public:
+    template <typename T>
+    void Register(const std::string& tag) {
+        static_assert(std::is_base_of<Rml::Element, T>::value, "T must derive from Rml::Element");
+        auto instancer = std::make_unique<Rml::ElementInstancerGeneric<T>>();
+        Rml::Factory::RegisterElementInstancer(tag, instancer.get());
+        instancers.push_back(std::move(instancer));
+    }
+
+private:
+    std::vector<std::unique_ptr<Rml::ElementInstancer>> instancers;
+};