Give widget access to taffy layout

showbits-common/src/tree.rs

@@ -55,13 +55,13 @@ impl<C> Tree<C> {
         node: NodeId,
         view: &mut View<'_>,
     ) -> anyhow::Result<()> {
-        let layout = self.tree.layout(node)?;
+        let layout = *self.tree.layout(node)?;
         let area = Rect::from_nw(point_to_vec2(layout.location), size_to_vec2(layout.size));
         let mut view = view.dup().zoom(area);
 
         // First pass
         if let Some(widget) = self.tree.get_node_context_mut(node) {
-            widget.draw_below(ctx, &mut view)?;
+            widget.draw_below(ctx, &mut view, &layout)?;
         }
 
         // Render children
@@ -77,7 +77,7 @@ impl<C> Tree<C> {
 
         // Second pass
         if let Some(widget) = self.tree.get_node_context_mut(node) {
-            widget.draw_above(ctx, &mut view)?;
+            widget.draw_above(ctx, &mut view, &layout)?;
         }
 
         Ok(())

showbits-common/src/widget.rs

@@ -1,4 +1,4 @@
-use taffy::{AvailableSpace, Size};
+use taffy::{AvailableSpace, Layout, Size};
 
 use crate::{Node, View};
 
@@ -19,13 +19,23 @@ pub trait Widget<C> {
     ///
     /// Prefer this over [`Self::draw_above`] when implementing a leaf widget.
     #[allow(unused_variables)]
-    fn draw_below(&mut self, ctx: &mut C, view: &mut View<'_>) -> anyhow::Result<()> {
+    fn draw_below(
+        &mut self,
+        ctx: &mut C,
+        view: &mut View<'_>,
+        layout: &Layout,
+    ) -> anyhow::Result<()> {
         Ok(())
     }
 
     /// Called after all children are drawn.
     #[allow(unused_variables)]
-    fn draw_above(&mut self, ctx: &mut C, view: &mut View<'_>) -> anyhow::Result<()> {
+    fn draw_above(
+        &mut self,
+        ctx: &mut C,
+        view: &mut View<'_>,
+        layout: &Layout,
+    ) -> anyhow::Result<()> {
         Ok(())
     }
 }

showbits-common/src/widgets/text.rs

@@ -1,6 +1,9 @@
 use cosmic_text::{Attrs, Buffer, FontSystem, Metrics, Shaping, SwashCache};
 use palette::Srgba;
-use taffy::prelude::{AvailableSpace, Size};
+use taffy::{
+    prelude::{AvailableSpace, Size},
+    Layout,
+};
 
 use crate::{color, Rect, Vec2, View, Widget};
 
@@ -120,7 +123,12 @@ impl<C: HasFontStuff> Widget<C> for Text {
         Size { width, height }
     }
 
-    fn draw_below(&mut self, ctx: &mut C, view: &mut View<'_>) -> anyhow::Result<()> {
+    fn draw_below(
+        &mut self,
+        ctx: &mut C,
+        view: &mut View<'_>,
+        _layout: &Layout,
+    ) -> anyhow::Result<()> {
         let size = view.size();
 
         let FontStuff {