[00251] Change ViewTree API from Box<dyn View> to Arc<dyn View>

Author: rorychatt

rusty/src/core/runtime.rs

@@ -39,7 +39,7 @@ impl Runtime {
     pub fn new(root: impl View) -> Self {
         let (event_tx, event_rx) = mpsc::channel(2048);
         let (rebuild_tx, rebuild_rx) = mpsc::channel(256);
-        let view_tree = ViewTree::new(Box::new(root));
+        let view_tree = ViewTree::new(Arc::new(root));
         Runtime {
             view_tree,
             tree: Arc::new(RwLock::new(None)),
@@ -543,9 +543,9 @@ mod tests {
         let cleanup_called_clone = cleanup_called.clone();
 
         // Create a view tree with a child
-        let mut tree = ViewTree::new(Box::new(|_ctx: &mut BuildContext| Element::Empty));
+        let mut tree = ViewTree::new(Arc::new(|_ctx: &mut BuildContext| Element::Empty));
         let root_id = tree.root_id();
-        let child_id = tree.insert(root_id, Box::new(|_ctx: &mut BuildContext| Element::Empty));
+        let child_id = tree.insert(root_id, Arc::new(|_ctx: &mut BuildContext| Element::Empty));
 
         // Set up HookStores with an effect cleanup for the child
         let mut hook_stores: HashMap<ViewId, HookStore> = HashMap::new();

rusty/src/core/view_tree.rs

@@ -25,11 +25,11 @@ pub struct ViewTree {
 
 impl ViewTree {
     /// Create a new ViewTree with a root view.
-    pub fn new(root_view: Box<dyn View>) -> Self {
+    pub fn new(root_view: Arc<dyn View>) -> Self {
         let root_id = uuid::Uuid::new_v4();
         let root_node = ViewNode {
             view_id: root_id,
-            view: Arc::from(root_view),
+            view: root_view,
             parent: None,
             children: Vec::new(),
         };
@@ -44,11 +44,11 @@ impl ViewTree {
     }
 
     /// Insert a child view under the given parent, returning the new child's ViewId.
-    pub fn insert(&mut self, parent_id: ViewId, view: Box<dyn View>) -> ViewId {
+    pub fn insert(&mut self, parent_id: ViewId, view: Arc<dyn View>) -> ViewId {
         let child_id = uuid::Uuid::new_v4();
         let child_node = ViewNode {
             view_id: child_id,
-            view: Arc::from(view),
+            view,
             parent: Some(parent_id),
             children: Vec::new(),
         };
@@ -64,11 +64,11 @@ impl ViewTree {
         &mut self,
         parent_id: ViewId,
         child_id: ViewId,
-        view: Box<dyn View>,
+        view: Arc<dyn View>,
     ) -> ViewId {
         let child_node = ViewNode {
             view_id: child_id,
-            view: Arc::from(view),
+            view,
             parent: Some(parent_id),
             children: Vec::new(),
         };
@@ -178,11 +178,11 @@ mod tests {
 
     #[test]
     fn test_view_tree_insert_and_ancestors() {
-        let mut tree = ViewTree::new(Box::new(DummyView("root".into())));
+        let mut tree = ViewTree::new(Arc::new(DummyView("root".into())));
         let root = tree.root_id();
 
-        let child = tree.insert(root, Box::new(DummyView("child".into())));
-        let grandchild = tree.insert(child, Box::new(DummyView("grandchild".into())));
+        let child = tree.insert(root, Arc::new(DummyView("child".into())));
+        let grandchild = tree.insert(child, Arc::new(DummyView("grandchild".into())));
 
         let ancestors = tree.ancestors(grandchild);
         assert_eq!(ancestors.len(), 2);
@@ -195,12 +195,12 @@ mod tests {
 
     #[test]
     fn test_view_tree_remove_subtree() {
-        let mut tree = ViewTree::new(Box::new(DummyView("root".into())));
+        let mut tree = ViewTree::new(Arc::new(DummyView("root".into())));
         let root = tree.root_id();
 
-        let child = tree.insert(root, Box::new(DummyView("child".into())));
-        let gc1 = tree.insert(child, Box::new(DummyView("gc1".into())));
-        let gc2 = tree.insert(child, Box::new(DummyView("gc2".into())));
+        let child = tree.insert(root, Arc::new(DummyView("child".into())));
+        let gc1 = tree.insert(child, Arc::new(DummyView("gc1".into())));
+        let gc2 = tree.insert(child, Arc::new(DummyView("gc2".into())));
 
         let removed = tree.remove(child);
         assert_eq!(removed.len(), 3);
@@ -217,12 +217,12 @@ mod tests {
 
     #[test]
     fn test_view_tree_subtree_ids() {
-        let mut tree = ViewTree::new(Box::new(DummyView("root".into())));
+        let mut tree = ViewTree::new(Arc::new(DummyView("root".into())));
         let root = tree.root_id();
 
-        let c1 = tree.insert(root, Box::new(DummyView("c1".into())));
-        let c2 = tree.insert(root, Box::new(DummyView("c2".into())));
-        let gc = tree.insert(c1, Box::new(DummyView("gc".into())));
+        let c1 = tree.insert(root, Arc::new(DummyView("c1".into())));
+        let c2 = tree.insert(root, Arc::new(DummyView("c2".into())));
+        let gc = tree.insert(c1, Arc::new(DummyView("gc".into())));
 
         let subtree = tree.subtree_ids(root);
         assert_eq!(subtree.len(), 4);

rusty/src/views/view.rs

@@ -159,7 +159,7 @@ pub struct EffectRecord {
 /// Entry for a child view registered during build via `child_view()`.
 pub struct ChildViewEntry {
     pub child_view_id: ViewId,
-    pub view: Box<dyn View>,
+    pub view: Arc<dyn View>,
     pub element: Element,
 }
 
@@ -321,7 +321,7 @@ impl<'a> BuildContext<'a> {
 
         self.child_views.push(ChildViewEntry {
             child_view_id,
-            view: Box::new(view),
+            view: Arc::new(view),
             element: element.clone(),
         });