Implement explicit text caching in the widget state tree

core/src/layout.rs

@@ -7,7 +7,7 @@ pub mod flex;
 pub use limits::Limits;
 pub use node::Node;
 
-use crate::{Point, Rectangle, Vector};
+use crate::{Point, Rectangle, Size, Vector};
 
 /// The bounds of a [`Node`] and its children, using absolute coordinates.
 #[derive(Debug, Clone, Copy)]
@@ -63,3 +63,29 @@ impl<'a> Layout<'a> {
         })
     }
 }
+
+/// Produces a [`Node`] with two children nodes one right next to each other.
+pub fn next_to_each_other(
+    limits: &Limits,
+    spacing: f32,
+    left: impl FnOnce(&Limits) -> Node,
+    right: impl FnOnce(&Limits) -> Node,
+) -> Node {
+    let left_node = left(limits);
+    let left_size = left_node.size();
+
+    let right_limits = limits.shrink(Size::new(left_size.width + spacing, 0.0));
+
+    let mut right_node = right(&right_limits);
+    let right_size = right_node.size();
+
+    right_node.move_to(Point::new(left_size.width + spacing, 0.0));
+
+    Node::with_children(
+        Size::new(
+            left_size.width + spacing + right_size.width,
+            left_size.height.max(right_size.height),
+        ),
+        vec![left_node, right_node],
+    )
+}