Show only continuing candidates in detailed transfers table

src/cli/stv.rs

@@ -394,7 +394,7 @@ fn print_stage<N: Number>(stage_num: u32, state: &CountState<N>, opts: &STVOptio
 	if opts.transfers_detail {
 		if let Some(tt) = &state.transfer_table {
 			println!();
-			println!("{}", tt.render_text(state, opts));
+			println!("{}", tt.render_text(opts));
 		}
 	}
 	

src/stv/gregory/mod.rs

@@ -311,7 +311,10 @@ where
 	
 	// Reweight and transfer parcels
 	
-	let mut transfer_table = TransferTable::new_surplus(surplus.clone(), surplus_fraction.clone(), surplus_numer.clone(), surplus_denom.clone());
+	let mut transfer_table = TransferTable::new_surplus(
+		state.election.candidates.iter().filter(|c| state.candidates[c].state == CandidateState::Hopeful || state.candidates[c].state == CandidateState::Guarded).collect(),
+		surplus.clone(), surplus_fraction.clone(), surplus_numer.clone(), surplus_denom.clone()
+	);
 	
 	for (value_fraction, result) in parcels_next_prefs {
 		for (candidate, entry) in result.candidates.into_iter() {
@@ -563,7 +566,9 @@ where
 	
 	let value = match parcels.first() { Some(p) => Some(p.value_fraction.clone()), _ => None };
 	
-	let mut transfer_table = TransferTable::new_exclusion();
+	let mut transfer_table = TransferTable::new_exclusion(
+		state.election.candidates.iter().filter(|c| state.candidates[c].state == CandidateState::Hopeful || state.candidates[c].state == CandidateState::Guarded).collect(),
+	);
 	
 	for parcel in parcels {
 		// Count next preferences

src/stv/gregory/transfers.rs

@@ -28,6 +28,9 @@ use std::collections::HashMap;
 
 /// Table describing vote transfers during a surplus distribution or exclusion
 pub struct TransferTable<'e, N: Number> {
+	/// Continuing candidates
+	pub hopefuls: Vec<&'e Candidate>,
+	
 	/// Columns in the table
 	pub columns: Vec<TransferTableColumn<'e, N>>,
 	
@@ -46,8 +49,9 @@ pub struct TransferTable<'e, N: Number> {
 
 impl<'e, N: Number> TransferTable<'e, N> {
 	/// Return a new [TransferTable] for an exclusion
-	pub fn new_exclusion() -> Self {
+	pub fn new_exclusion(hopefuls: Vec<&'e Candidate>) -> Self {
 		TransferTable {
+			hopefuls,
 			columns: Vec::new(),
 			total: TransferTableColumn {
 				value_fraction: N::new(),
@@ -63,8 +67,9 @@ impl<'e, N: Number> TransferTable<'e, N> {
 	}
 	
 	/// Return a new [TransferTable] for a surplus distribution
-	pub fn new_surplus(surplus: N, surpfrac: Option<N>, surpfrac_numer: Option<N>, surpfrac_denom: Option<N>) -> Self {
+	pub fn new_surplus(hopefuls: Vec<&'e Candidate>, surplus: N, surpfrac: Option<N>, surpfrac_numer: Option<N>, surpfrac_denom: Option<N>) -> Self {
 		TransferTable {
+			hopefuls,
 			columns: Vec::new(),
 			total: TransferTableColumn {
 				value_fraction: N::new(),
@@ -291,7 +296,7 @@ impl<'e, N: Number> TransferTable<'e, N> {
 	}
 	
 	/// Render table as [Table]
-	fn render(&self, state: &CountState<N>, opts: &STVOptions) -> Table {
+	fn render(&self, opts: &STVOptions) -> Table {
 		let mut table = Table::new();
 		set_table_format(&mut table);
 		
@@ -299,12 +304,12 @@ impl<'e, N: Number> TransferTable<'e, N> {
 		
 		let num_cols;
 		if show_transfers_per_ballot {
-			num_cols = state.candidates.len() * 3 + 4;
+			num_cols = self.columns.len() * 3 + 4;
 		} else {
 			if self.surpfrac.is_none() {
-				num_cols = state.candidates.len() * 2 + 3;
+				num_cols = self.columns.len() * 2 + 3;
 			} else {
-				num_cols = state.candidates.len() * 2 + 4;
+				num_cols = self.columns.len() * 2 + 4;
 			}
 		}
 		
@@ -329,7 +334,7 @@ impl<'e, N: Number> TransferTable<'e, N> {
 		// --------------
 		// Candidate rows
 		
-		for candidate in state.election.candidates.iter() {
+		for candidate in self.hopefuls.iter() {
 			let mut row = Vec::with_capacity(num_cols);
 			row.push(Cell::new(&candidate.name));
 			for column in self.columns.iter() {
@@ -432,7 +437,7 @@ impl<'e, N: Number> TransferTable<'e, N> {
 		let mut gt_votes_in = N::new();
 		let mut gt_votes_out = N::new();
 		
-		for candidate in state.election.candidates.iter() {
+		for candidate in self.hopefuls.iter() {
 			if let Some(cell) = self.total.cells.get(candidate) {
 				gt_ballots += &cell.ballots;
 				gt_votes_in += &cell.votes_in;
@@ -456,13 +461,13 @@ impl<'e, N: Number> TransferTable<'e, N> {
 	
 	/// Render table as plain text
 	#[cfg(not(target_arch = "wasm32"))]
-	pub fn render_text(&self, state: &CountState<N>, opts: &STVOptions) -> String {
+	pub fn render_text(&self, opts: &STVOptions) -> String {
-		return self.render(state, opts).to_string();
+		return self.render(opts).to_string();
 	}
 	
 	/// Render table as HTML
-	pub fn render_html(&self, state: &CountState<N>, opts: &STVOptions) -> String {
+	pub fn render_html(&self, opts: &STVOptions) -> String {
-		return self.render(state, opts).to_string();
+		return self.render(opts).to_string();
 	}
 }
 

src/stv/wasm.rs

@@ -177,7 +177,7 @@ macro_rules! impl_type {
 			/// Call [render_html](crate::stv::transfers::TransferTable::render_html) on [CountState::transfer_table]
 			pub fn transfer_table_render_html(&self, opts: &STVOptions) -> Option<String> {
 				return match &self.0.transfer_table {
-					Some(tt) => Some(tt.render_html(&self.0, &opts.0)), // TODO
+					Some(tt) => Some(tt.render_html(&opts.0)), // TODO
 					None => None,
 				};
 			}