EdnViewData has to go?

output/src/edn_view.rs

@@ -1,6 +1,19 @@
 use crate::*;
 use std::marker::PhantomData;
 use EdnItem::*;
+/// Implements `EdnProvide` for content components and expressions
+#[macro_export] macro_rules! edn_provide_content {
+    (|$self:ident:$Stat:ty|{ $($pat:pat => $expr:expr),* $(,)? }) => {
+        impl<'a> EdnProvide<'a, Box<dyn Render<TuiOut> + 'a>> for $State {
+            fn get <S: AsRef<str>> (&'a $self, edn: &'a EdnItem<S>) -> Option<Box<dyn Render<TuiOut> + 'a>> {
+                Some(match edn.to_ref() {
+                    $(EdnItem::Sym($pat) => $expr),*,
+                    _ => return None
+                })
+            }
+        }
+    }
+}
 /// Renders from EDN source and context.
 #[derive(Default)]
 pub enum EdnView<'a, E: Output, T: EdnViewData<'a, E> + std::fmt::Debug> {

output/src/measure.rs

@@ -1,13 +1,10 @@
 use crate::*;
 use std::sync::{Arc, atomic::{AtomicUsize, Ordering::Relaxed}};
 //use ratatui::prelude::{Style, Color};
-
 // TODO: 🡘  🡙 ←🡙→ indicator to expand window when too small
-
 pub trait HasSize<E: Output> {
     fn size (&self) -> &Measure<E>;
 }
-
 #[macro_export] macro_rules! has_size {
     (<$E:ty>|$self:ident:$Struct:ident$(<$($L:lifetime),*$($T:ident$(:$U:path)?),*>)?|$cb:expr) => {
         impl $(<$($L),*$($T $(: $U)?),*>)? HasSize<$E> for $Struct $(<$($L),*$($T),*>)? {
@@ -15,7 +12,6 @@ pub trait HasSize<E: Output> {
         }
     }
 }
-
 /// A widget that tracks its render width and height
 #[derive(Default)]
 pub struct Measure<E: Output> {
@@ -23,14 +19,12 @@ pub struct Measure<E: Output> {
     pub x: Arc<AtomicUsize>,
     pub y: Arc<AtomicUsize>,
 }
-
 impl<E: Output> Content<E> for Measure<E> {
     fn render (&self, to: &mut E) {
         self.x.store(to.area().w().into(), Relaxed);
         self.y.store(to.area().h().into(), Relaxed);
     }
 }
-
 impl<E: Output> Clone for Measure<E> {
     fn clone (&self) -> Self {
         Self {
@@ -40,7 +34,6 @@ impl<E: Output> Clone for Measure<E> {
         }
     }
 }
-
 impl<E: Output> std::fmt::Debug for Measure<E> {
     fn fmt (&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
         f.debug_struct("Measure")
@@ -49,7 +42,6 @@ impl<E: Output> std::fmt::Debug for Measure<E> {
             .finish()
     }
 }
-
 impl<E: Output> Measure<E> {
     pub fn w (&self) -> usize { self.x.load(Relaxed) }
     pub fn h (&self) -> usize { self.y.load(Relaxed) }
@@ -69,7 +61,6 @@ impl<E: Output> Measure<E> {
         Bsp::b(Fill::xy(self), item)
     }
 }
-
 ///// A scrollable area.
 //pub struct Scroll<E, F>(pub F, pub Direction, pub u64, PhantomData<E>)
 //where