Draft custom layout engine based on druid

native/src/layout/node.rs

@@ -0,0 +1,37 @@
+use crate::{Rectangle, Size};
+
+#[derive(Debug, Clone, Default)]
+pub struct Node {
+    pub bounds: Rectangle,
+    children: Vec<Node>,
+}
+
+impl Node {
+    pub fn new(size: Size) -> Self {
+        Self::with_children(size, Vec::new())
+    }
+
+    pub fn with_children(size: Size, children: Vec<Node>) -> Self {
+        Node {
+            bounds: Rectangle {
+                x: 0.0,
+                y: 0.0,
+                width: size.width,
+                height: size.height,
+            },
+            children,
+        }
+    }
+
+    pub fn size(&self) -> Size {
+        Size::new(self.bounds.width, self.bounds.height)
+    }
+
+    pub fn bounds(&self) -> Rectangle {
+        self.bounds
+    }
+
+    pub fn children(&self) -> &[Node] {
+        &self.children
+    }
+}