wip: making progress on diffing and hydration

packages/web/src/nodeslab.rs

@@ -0,0 +1,41 @@
+use std::ops::{Index, IndexMut};
+
+use web_sys::Node;
+
+pub struct NodeSlab {
+    nodes: Vec<Option<Node>>,
+}
+
+impl NodeSlab {
+    pub fn new(capacity: usize) -> NodeSlab {
+        NodeSlab {
+            nodes: Vec::with_capacity(capacity),
+        }
+    }
+
+    fn insert_and_extend(&mut self, node: Node, id: usize) {
+        if id > self.nodes.len() * 3 {
+            panic!("Trying to insert an element way too far out of bounds");
+        }
+
+        if id < self.nodes.len() {}
+    }
+}
+impl Index<usize> for NodeSlab {
+    type Output = Option<Node>;
+    fn index(&self, index: usize) -> &Self::Output {
+        &self.nodes[index]
+    }
+}
+
+impl IndexMut<usize> for NodeSlab {
+    fn index_mut(&mut self, index: usize) -> &mut Self::Output {
+        if index >= self.nodes.len() * 3 {
+            panic!("Trying to mutate an element way too far out of bounds");
+        }
+        if index > self.nodes.len() {
+            self.nodes.resize_with(index, || None);
+        }
+        &mut self.nodes[index]
+    }
+}