Replace `RouteSelector` with `NetSelector`

I don't think identifying routes by pin name pair is going to be really
useful.

topola/src/board/selections/mod.rs

@@ -3,10 +3,11 @@
 // SPDX-License-Identifier: MIT OR Apache-2.0
 
 mod component;
+mod net;
 mod persistable;
 mod pin;
-mod route;
 
 pub use component::{ComponentSelection, ComponentSelector};
+pub use net::{NetSelection, NetSelector};
 pub use persistable::PersistableSelection;
 pub use pin::{PinSelection, PinSelector};

topola/src/board/selections/net.rs

@@ -6,32 +6,26 @@ use std::collections::BTreeSet;
 
 use serde::{Deserialize, Serialize};
 
-use crate::selections::PinSelector;
-
 #[derive(Clone, Debug, Default, Deserialize, Eq, Ord, PartialEq, PartialOrd, Serialize)]
-pub struct RouteSelector {
-    lesser_pin: PinSelector,
-    greater_pin: PinSelector,
+pub struct NetSelector {
+    pub net: String,
 }
 
-impl RouteSelector {
-    pub fn new(pin1: PinSelector, pin2: PinSelector) -> Self {
-        Self {
-            lesser_pin: std::cmp::min(pin1.clone(), pin2.clone()),
-            greater_pin: std::cmp::max(pin1, pin2),
-        }
+impl NetSelector {
+    pub fn new(net: String) -> Self {
+        Self { net }
     }
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, Ord, PartialEq, PartialOrd, Serialize)]
-pub struct RouteSelection(pub BTreeSet<RouteSelector>);
+pub struct NetSelection(pub BTreeSet<NetSelector>);
 
-impl RouteSelection {
+impl NetSelection {
     pub fn new() -> Self {
         Default::default()
     }
 
-    pub fn toggle(&mut self, selector: RouteSelector) {
+    pub fn toggle(&mut self, selector: NetSelector) {
         if self.0.contains(&selector) {
             self.0.remove(&selector);
         } else {

topola/src/board/selections/persistable.rs

@@ -4,15 +4,12 @@
 
 use serde::{Deserialize, Serialize};
 
-use crate::{
-    board::selections::{ComponentSelection, PinSelection},
-    selections::route::RouteSelection,
-};
+use crate::board::selections::{ComponentSelection, NetSelection, PinSelection};
 
 #[derive(Clone, Debug, Default, Deserialize, Eq, Ord, PartialEq, PartialOrd, Serialize)]
 pub struct PersistableSelection {
     pub components: ComponentSelection,
-    pub routes: RouteSelection,
+    pub nets: NetSelection,
     pub pins: PinSelection,
 }
 
@@ -20,7 +17,7 @@ impl PersistableSelection {
     pub fn new() -> Self {
         Self {
             components: ComponentSelection::new(),
-            routes: RouteSelection::new(),
+            nets: NetSelection::new(),
             pins: PinSelection::new(),
         }
     }