fix(autorouter): have band removal and via placement in undo/redo

src/autorouter/execution.rs

@@ -53,12 +53,12 @@ impl ExecutionStepper {
                 }
             },
             ExecutionStepper::PlaceVia(place_via) => {
-                place_via.doit(autorouter)?;
-                ControlFlow::Break((None, "finished placing via".to_string()))
+                let edit = place_via.doit(autorouter)?;
+                ControlFlow::Break((edit, "finished placing via".to_string()))
             }
             ExecutionStepper::RemoveBands(remove_bands) => {
-                remove_bands.doit(autorouter)?;
-                ControlFlow::Break((None, "finished removing bands".to_string()))
+                let edit = remove_bands.doit(autorouter)?;
+                ControlFlow::Break((edit, "finished removing bands".to_string()))
             }
             ExecutionStepper::CompareDetours(compare_detours) => {
                 match compare_detours.step(autorouter)? {

src/autorouter/place_via.rs

@@ -32,16 +32,18 @@ impl PlaceViaExecutionStepper {
     pub fn doit(
         &mut self,
         autorouter: &mut Autorouter<impl AccessMesadata>,
-    ) -> Result<(), AutorouterError> {
+    ) -> Result<Option<LayoutEdit>, AutorouterError> {
         if !self.done {
             self.done = true;
+
+            let mut edit = LayoutEdit::new();
             autorouter
                 .board
                 .layout_mut()
-                .add_via(&mut LayoutEdit::new(), self.weight)?;
-            Ok(())
+                .add_via(&mut edit, self.weight)?;
+            Ok(Some(edit))
         } else {
-            Ok(())
+            Ok(None)
         }
     }
 }

src/autorouter/remove_bands.rs

@@ -31,20 +31,18 @@ impl RemoveBandsExecutionStepper {
     pub fn doit(
         &mut self,
         autorouter: &mut Autorouter<impl AccessMesadata>,
-    ) -> Result<(), AutorouterError> {
+    ) -> Result<Option<LayoutEdit>, AutorouterError> {
         if !self.done {
             self.done = true;
 
+            let mut edit = LayoutEdit::new();
             for selector in self.selection.selectors() {
                 let band = autorouter.board.bandname_band(&selector.band).unwrap().0;
-                autorouter
-                    .board
-                    .layout_mut()
-                    .remove_band(&mut LayoutEdit::new(), band);
+                autorouter.board.layout_mut().remove_band(&mut edit, band);
             }
-            Ok(())
+            Ok(Some(edit))
         } else {
-            Ok(())
+            Ok(None)
         }
     }
 }