board: remove `.remove_band()` method

src/autorouter/autoroute.rs

@@ -3,7 +3,7 @@ use petgraph::graph::EdgeIndex;
 use crate::{
     autorouter::{Autorouter, AutorouterError, AutorouterStatus},
     board::mesadata::MesadataTrait,
-    router::navmesh::Navmesh,
+    router::{navmesh::Navmesh, Router},
 };
 
 pub struct Autoroute {
@@ -54,23 +54,24 @@ impl Autoroute {
             (None, None)
         };
 
-        match autorouter.board.route_band(
-            std::mem::replace(&mut self.navmesh, new_navmesh).unwrap(),
-            100.0,
-        ) {
-            Ok(band) => {
-                autorouter
-                    .ratsnest
-                    .assign_band_to_ratline(self.cur_ratline.unwrap(), band);
-                self.cur_ratline = new_ratline;
+        let navmesh = std::mem::replace(&mut self.navmesh, new_navmesh).unwrap();
+        let mut router = Router::new(autorouter.board.layout_mut());
 
-                if self.navmesh.is_some() {
-                    Ok(AutorouterStatus::Running)
-                } else {
-                    Ok(AutorouterStatus::Finished)
-                }
-            }
-            Err(err) => Err(AutorouterError::Router(err)),
+        let band = router.route(navmesh.source(), navmesh.target(), 100.0)?;
+
+        autorouter
+            .ratsnest
+            .assign_band_to_ratline(self.cur_ratline.unwrap(), band);
+        self.cur_ratline = new_ratline;
+
+        autorouter
+            .board
+            .try_set_band_between_nodes(navmesh.source(), navmesh.target(), band);
+
+        if self.navmesh.is_some() {
+            Ok(AutorouterStatus::Running)
+        } else {
+            Ok(AutorouterStatus::Finished)
         }
     }
 

src/board/board.rs

@@ -115,31 +115,6 @@ impl<M: MesadataTrait> Board<M> {
         zone
     }
 
-    pub fn route_band(
-        &mut self,
-        navmesh: Navmesh,
-        width: f64,
-    ) -> Result<BandFirstSegIndex, RouterError> {
-        let source_pinname = self
-            .node_pinname(GenericNode::Primitive(navmesh.source().into()))
-            .unwrap()
-            .to_string();
-        let target_pinname = self
-            .node_pinname(GenericNode::Primitive(navmesh.target().into()))
-            .unwrap()
-            .to_string();
-
-        let mut router = Router::new(self.layout_mut());
-        let result = router.route(navmesh.source(), navmesh.target(), width);
-
-        if let Ok(band) = result {
-            self.pinname_pair_to_band
-                .insert((source_pinname, target_pinname), band);
-        }
-
-        result
-    }
-
     pub fn zone_apex(&mut self, zone: GenericIndex<ZoneWeight>) -> FixedDotIndex {
         if let Some(apex) = self.layout.zone(zone).maybe_apex() {
             apex
@@ -162,6 +137,24 @@ impl<M: MesadataTrait> Board<M> {
         self.node_to_pinname.get(&node)
     }
 
+    pub fn try_set_band_between_nodes(
+        &mut self,
+        source: FixedDotIndex,
+        target: FixedDotIndex,
+        band: BandFirstSegIndex,
+    ) {
+        let source_pinname = self
+            .node_pinname(GenericNode::Primitive(source.into()))
+            .unwrap()
+            .to_string();
+        let target_pinname = self
+            .node_pinname(GenericNode::Primitive(target.into()))
+            .unwrap()
+            .to_string();
+        self.pinname_pair_to_band
+            .insert((source_pinname, target_pinname), band);
+    }
+
     pub fn band_between_pins(&self, pinname1: &str, pinname2: &str) -> Option<BandFirstSegIndex> {
         if let Some(band) = self
             .pinname_pair_to_band