fix: orphaned fn

tui/src/tui_engine.rs

@@ -102,3 +102,47 @@ impl<T: TuiWidget + Send + Sync + 'static> TuiRun<T> for Arc<RwLock<Tui>> {
         Ok(())
     }
 }
+
+#[cfg(feature = "dsl")] 
+pub fn evaluate_output_expression_tui <'a, S> (
+    state: &S, mut output: &mut TuiOut, expr: impl DslExpr + 'a
+) -> Usually<bool> where
+    S: View<TuiOut, ()>
+        + for<'b>DslNs<'b, bool>
+        + for<'b>DslNs<'b, u16>
+        + for<'b>DslNs<'b, Color>
+{
+    // See `tengri_output::evaluate_output_expression`
+    let head = expr.head()?;
+    let mut frags = head.src()?.unwrap_or_default().split("/");
+    let args = expr.tail();
+    let arg0 = args.head();
+    let tail0 = args.tail();
+    let arg1 = tail0.head();
+    let tail1 = tail0.tail();
+    let arg2 = tail1.head();
+    match frags.next() {
+
+        Some("text") => if let Some(src) = args?.src()? { output.place(&src) },
+
+        Some("fg") => {
+            let arg0 = arg0?.expect("fg: expected arg 0 (color)");
+            output.place(&Tui::fg(
+                DslNs::<Color>::from(state, arg0)?.unwrap_or_else(||panic!("fg: {arg0:?}: not a color")),
+                Thunk::new(move|output: &mut TuiOut|state.view(output, &arg1).unwrap()),
+            ))
+        },
+
+        Some("bg") => {
+            let arg0 = arg0?.expect("bg: expected arg 0 (color)");
+            output.place(&Tui::bg(
+                DslNs::<Color>::from(state, arg0)?.unwrap_or_else(||panic!("bg: {arg0:?}: not a color")),
+                Thunk::new(move|output: &mut TuiOut|state.view(output, &arg1).unwrap()),
+            ))
+        },
+
+        _ => return Ok(false)
+
+    };
+    Ok(true)
+}