initial work

src/rojo_ref.rs

@@ -1,5 +1,6 @@
 use std::{fmt, sync::Arc};
 
+use rbx_dom_weak::{types::Ref, WeakDom};
 use serde::{Deserialize, Serialize};
 
 /// Legacy: ID attribute on target instances (kept for backwards compatibility)
@@ -11,6 +12,21 @@ pub const REF_POINTER_ATTRIBUTE_PREFIX: &str = "Rojo_Target_";
 /// No modification to the target instance is needed.
 pub const REF_PATH_ATTRIBUTE_PREFIX: &str = "Rojo_Ref_";
 
+/// Compute the `Rojo_Ref_*` attribute name for a given property name.
+///
+/// Example: `ref_attribute_name("PrimaryPart")` returns `"Rojo_Ref_PrimaryPart"`.
+pub fn ref_attribute_name(prop_name: &str) -> String {
+    format!("{REF_PATH_ATTRIBUTE_PREFIX}{prop_name}")
+}
+
+/// Compute the path to a target instance for use in a `Rojo_Ref_*` attribute.
+/// Returns the slash-separated path from the root (root name excluded).
+///
+/// Example: an instance at `DataModel > Workspace > Part1` returns `"Workspace/Part1"`.
+pub fn ref_target_path(dom: &WeakDom, target_ref: Ref) -> String {
+    dom.full_path_of(target_ref, "/")
+}
+
 // TODO add an internment strategy for RojoRefs
 // Something like what rbx-dom does for SharedStrings probably works