add view cursers and small refactor

src/CMakeLists.txt

@@ -5,6 +5,7 @@ add_library(solanaceae_message3
 	./solanaceae/message3/file_w_file.hpp
 	./solanaceae/message3/file_rw_file.hpp
 
+	./solanaceae/message3/message.hpp
 	./solanaceae/message3/components.hpp
 	./solanaceae/message3/components_id.inl
 

src/solanaceae/message3/components.hpp

@@ -2,6 +2,8 @@
 
 #include <solanaceae/contact/contact_model3.hpp>
 
+#include "./message.hpp"
+
 //fwd
 struct FileI;
 
@@ -14,11 +16,11 @@ struct FileI;
 namespace Message::Components {
 
 	struct ContactFrom {
-		Contact3 c;
+		Contact3 c{entt::null};
 	};
 
 	struct ContactTo {
-		Contact3 c;
+		Contact3 c{entt::null};
 	};
 
 	// best guess as to how this should be displayed in the global order
@@ -152,6 +154,21 @@ namespace Message::Components {
 
 	} // Transfer
 
+	// points to the front/newer message
+	// together they define a range that is,
+	// eg the first(end) and last(begin) message being eg. rendered
+	// MFS requires there to be atleast one other fragment after/before,
+	// if not loaded fragment with fitting tsrange(direction) available
+	// uses fragmentAfter/Before()
+	// they can exist standalone (wip)
+	// if they are a pair, the inside is filled first
+	struct ViewCurserBegin {
+		Message3 curser_end{entt::null};
+	};
+	struct ViewCurserEnd {
+		Message3 curser_begin{entt::null};
+	};
+
 } // Message::Components
 
 #include "./components_id.inl"

src/solanaceae/message3/message.hpp

@@ -0,0 +1,7 @@
+#pragma once
+
+#include <cstdint>
+
+// strong typing
+enum class Message3 : uint32_t {};
+

src/solanaceae/message3/registry_message_model.hpp

@@ -2,6 +2,7 @@
 
 #include <solanaceae/util/event_provider.hpp>
 
+#include "./message.hpp"
 #include "./message_model3.hpp"
 
 #include <entt/entity/registry.hpp>
@@ -10,8 +11,6 @@
 
 #include <memory>
 
-// strong typing
-enum class Message3 : uint32_t {};
 using Message3Registry = entt::basic_registry<Message3>;
 using Message3Handle = entt::basic_handle<Message3Registry>;