Implemented owned_walk_path.

src/renderer/walking.rs

@@ -53,9 +53,21 @@ pub fn walk_path<'a>(
 }
 
 pub fn owned_walk_path<'a>(
-    breadcrumbs: &Vec<Box<dyn ContextElement>>,
+    breadcrumbs: &'a Vec<Box<dyn ContextElement>>,
     path: &Vec<String>,
 ) -> Result<&'a dyn ContextElement, WalkError> {
-    // TODO: Implement owned_walk_path
+    let path_reference: Vec<&str> = path.iter().map(|p| &p[..]).collect();
+    for context in breadcrumbs.iter().rev() {
+        match walk_path_from_single_level(context.as_ref(), &path_reference) {
+            // If no walking was done at all, keep looping
+            WalkResult::NoWalk => {}
+            // If we partially walked then stop trying to find
+            // anything
+            WalkResult::PartialWalk => {
+                return Err(WalkError::CantWalk);
+            }
+            WalkResult::FullyWalked(new_context) => return Ok(new_context),
+        }
+    }
     Err(WalkError::CantWalk)
 }