adw: prepare files for extraction

1 files changed, 37 insertions, 0 deletions

diff --git a/include/adwaitamm/helpers/gobj_mixin.hpp b/include/adwaitamm/helpers/gobj_mixin.hpp
new file mode 100644
index 0000000..2a6aa37
--- /dev/null
+++ b/include/adwaitamm/helpers/gobj_mixin.hpp
@@ -0,0 +1,37 @@
+#ifndef LIBADWAITAMM_HELPERS_GOBJ_MIXIN_HPP
+#define LIBADWAITAMM_HELPERS_GOBJ_MIXIN_HPP
+
+#include <glibmm/object.h>
+
+#include <type_traits>
+
+namespace turns::adw::helpers
+{
+
+  template<typename Type, typename AdwType>
+  struct gobj_mixin
+  {
+    template<typename Self>
+    auto gobj(this Self && self) noexcept
+    {
+      using clean_type = std::remove_reference_t<Self>;
+      using gobj_type = std::conditional_t<std::is_const_v<clean_type>, std::add_const_t<Glib::Object>, Glib::Object>;
+      using cast_type = std::conditional_t<std::is_const_v<clean_type>, std::add_const_t<AdwType>, AdwType>;
+
+      return reinterpret_cast<cast_type *>(static_cast<gobj_type &&>(self).gobj());
+    }
+
+    template<typename Self>
+    auto gobj_copy(this Self && self) noexcept -> AdwType *
+    {
+      using clean_type = std::remove_reference_t<Self>;
+      using gobj_type = std::conditional_t<std::is_const_v<clean_type>, std::add_const_t<Glib::Object>, Glib::Object>;
+
+      static_cast<gobj_type &&>(self).reference();
+      return const_cast<AdwType *>(self.gobj());
+    }
+  };
+
+}  // namespace turns::adw::helpers
+
+#endif
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