637 lines
22 KiB
Rust
637 lines
22 KiB
Rust
/* OpenTally: Open-source election vote counting
|
|
* Copyright © 2021–2022 Lee Yingtong Li (RunasSudo)
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
use crate::candmap::CandidateMap;
|
|
use crate::election::{Candidate, CountState};
|
|
use crate::numbers::Number;
|
|
use crate::stv::{STVOptions, RoundSubtransfersMode};
|
|
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
use prettytable::{Cell, Row, Table};
|
|
#[cfg(target_arch = "wasm32")]
|
|
use super::prettytable_html::{Cell, Row, Table};
|
|
|
|
use std::cmp::max;
|
|
|
|
/// Table describing vote transfers during a surplus distribution or exclusion
|
|
#[derive(Clone)]
|
|
pub struct TransferTable<'e, N: Number> {
|
|
/// Continuing candidates
|
|
pub hopefuls: Vec<&'e Candidate>,
|
|
|
|
/// Columns in the table
|
|
pub columns: Vec<TransferTableColumn<'e, N>>,
|
|
|
|
/// Total column
|
|
pub total: TransferTableColumn<'e, N>,
|
|
|
|
/// Size of surplus, or `None` if an exclusion
|
|
pub surplus: Option<N>,
|
|
/// Surplus fraction, or `None` if votes not reweighted/an exclusion (for display/optimisation only)
|
|
pub surpfrac: Option<N>,
|
|
/// Numerator of surplus fraction, or `None` if votes not reweighted/an exclusion
|
|
pub surpfrac_numer: Option<N>,
|
|
/// Denominator of surplus fraction, or `None`
|
|
pub surpfrac_denom: Option<N>,
|
|
}
|
|
|
|
impl<'e, N: Number> TransferTable<'e, N> {
|
|
/// Return a new [TransferTable] for an exclusion
|
|
pub fn new_exclusion(hopefuls: Vec<&'e Candidate>) -> Self {
|
|
let num_hopefuls = hopefuls.len();
|
|
|
|
return TransferTable {
|
|
hopefuls,
|
|
columns: Vec::new(),
|
|
total: TransferTableColumn {
|
|
value_fraction: N::new(),
|
|
order: 0,
|
|
cells: CandidateMap::with_capacity(num_hopefuls),
|
|
exhausted: TransferTableCell { ballots: N::new(), votes_in: N::new(), votes_out: N::new() },
|
|
total: TransferTableCell { ballots: N::new(), votes_in: N::new(), votes_out: N::new() },
|
|
},
|
|
surplus: None,
|
|
surpfrac: None,
|
|
surpfrac_numer: None,
|
|
surpfrac_denom: None,
|
|
}
|
|
}
|
|
|
|
/// Return a new [TransferTable] for a surplus distribution
|
|
pub fn new_surplus(hopefuls: Vec<&'e Candidate>, surplus: N, surpfrac: Option<N>, surpfrac_numer: Option<N>, surpfrac_denom: Option<N>) -> Self {
|
|
let num_hopefuls = hopefuls.len();
|
|
|
|
return TransferTable {
|
|
hopefuls,
|
|
columns: Vec::new(),
|
|
total: TransferTableColumn {
|
|
value_fraction: N::new(),
|
|
order: 0,
|
|
cells: CandidateMap::with_capacity(num_hopefuls),
|
|
exhausted: TransferTableCell { ballots: N::new(), votes_in: N::new(), votes_out: N::new() },
|
|
total: TransferTableCell { ballots: N::new(), votes_in: N::new(), votes_out: N::new() },
|
|
},
|
|
surplus: Some(surplus),
|
|
surpfrac,
|
|
surpfrac_numer,
|
|
surpfrac_denom,
|
|
}
|
|
}
|
|
|
|
/// Record the specified transfer
|
|
///
|
|
/// order: Pass `None` to force a new column
|
|
pub fn add_transfers(&mut self, value_fraction: &N, order: Option<usize>, candidate: &'e Candidate, ballots: &N) {
|
|
for col in self.columns.iter_mut() {
|
|
if &col.value_fraction == value_fraction && order.map(|o| col.order == o).unwrap_or(false) {
|
|
col.add_transfers(candidate, ballots);
|
|
return;
|
|
}
|
|
}
|
|
|
|
let mut col = TransferTableColumn {
|
|
value_fraction: value_fraction.clone(),
|
|
order: order.unwrap_or(0),
|
|
cells: CandidateMap::new(),
|
|
exhausted: TransferTableCell { ballots: N::new(), votes_in: N::new(), votes_out: N::new() },
|
|
total: TransferTableCell { ballots: N::new(), votes_in: N::new(), votes_out: N::new() },
|
|
};
|
|
col.add_transfers(candidate, ballots);
|
|
self.columns.push(col);
|
|
}
|
|
|
|
/// Record the specified exhaustion
|
|
///
|
|
/// order: Pass `None` to force a new column
|
|
pub fn add_exhausted(&mut self, value_fraction: &N, order: Option<usize>, ballots: &N) {
|
|
for col in self.columns.iter_mut() {
|
|
if &col.value_fraction == value_fraction && order.map(|o| col.order == o).unwrap_or(false) {
|
|
col.exhausted.ballots += ballots;
|
|
return;
|
|
}
|
|
}
|
|
|
|
let col = TransferTableColumn {
|
|
value_fraction: value_fraction.clone(),
|
|
order: order.unwrap_or(0),
|
|
cells: CandidateMap::new(),
|
|
exhausted: TransferTableCell { ballots: ballots.clone(), votes_in: N::new(), votes_out: N::new() },
|
|
total: TransferTableCell { ballots: N::new(), votes_in: N::new(), votes_out: N::new() },
|
|
};
|
|
self.columns.push(col);
|
|
}
|
|
|
|
/// Calculate the votes to be transferred according to this table
|
|
pub fn calculate(&mut self, opts: &STVOptions) {
|
|
// Use weighted rules if exclusion or WIGM
|
|
let is_weighted = self.surplus.is_none() || opts.surplus.is_weighted();
|
|
|
|
// Iterate through columns
|
|
// Sum votes_in, etc.
|
|
for column in self.columns.iter_mut() {
|
|
// Candidate votes
|
|
for (candidate, cell) in column.cells.iter_mut() {
|
|
column.total.ballots += &cell.ballots;
|
|
self.total.add_transfers(candidate, &cell.ballots);
|
|
self.total.total.ballots += &cell.ballots;
|
|
|
|
let votes_in = cell.ballots.clone() * &column.value_fraction;
|
|
cell.votes_in += &votes_in;
|
|
column.total.votes_in += &votes_in;
|
|
self.total.cells.get_mut(candidate).unwrap().votes_in += &votes_in;
|
|
self.total.total.votes_in += votes_in;
|
|
}
|
|
|
|
// Exhausted votes
|
|
column.total.ballots += &column.exhausted.ballots;
|
|
self.total.exhausted.ballots += &column.exhausted.ballots;
|
|
self.total.total.ballots += &column.exhausted.ballots;
|
|
|
|
let votes_in = column.exhausted.ballots.clone() * &column.value_fraction;
|
|
column.exhausted.votes_in += &votes_in;
|
|
column.total.votes_in += &votes_in;
|
|
self.total.exhausted.votes_in += &votes_in;
|
|
self.total.total.votes_in += votes_in;
|
|
}
|
|
|
|
match opts.round_subtransfers {
|
|
RoundSubtransfersMode::SingleStep => {
|
|
// No need to calculate votes_out for each column
|
|
|
|
// Calculate total votes_out per candidate
|
|
for (_candidate, cell) in self.total.cells.iter_mut() {
|
|
if is_weighted {
|
|
// Weighted rules
|
|
// Multiply votes in by surplus fraction
|
|
cell.votes_out = multiply_surpfrac(cell.votes_in.clone(), &self.surpfrac_numer, &self.surpfrac_denom);
|
|
} else if self.surpfrac.is_none() {
|
|
// Unweighted rules but transfer at values received
|
|
cell.votes_out = cell.votes_in.clone();
|
|
} else {
|
|
// Unweighted rules
|
|
// Multiply ballots in by surplus fraction
|
|
cell.votes_out = multiply_surpfrac(cell.ballots.clone(), &self.surpfrac_numer, &self.surpfrac_denom);
|
|
}
|
|
|
|
// Round if required
|
|
if let Some(dps) = opts.round_votes {
|
|
cell.votes_out.floor_mut(dps);
|
|
}
|
|
}
|
|
|
|
// Calculate total exhausted votes
|
|
if is_weighted {
|
|
// Weighted rules
|
|
// Multiply votes in by surplus fraction
|
|
self.total.exhausted.votes_out = multiply_surpfrac(self.total.exhausted.votes_in.clone(), &self.surpfrac_numer, &self.surpfrac_denom);
|
|
} else if self.surpfrac.is_none() {
|
|
// Unweighted rules but transfer at values received
|
|
// This can only happen with --transferable-only, so this will be calculated in apply_to
|
|
} else {
|
|
// Unweighted rules
|
|
// Multiply ballots in by surplus fraction
|
|
self.total.exhausted.votes_out = multiply_surpfrac(self.total.exhausted.ballots.clone(), &self.surpfrac_numer, &self.surpfrac_denom);
|
|
}
|
|
|
|
// Round if required
|
|
if let Some(dps) = opts.round_votes {
|
|
self.total.exhausted.votes_out.floor_mut(dps);
|
|
}
|
|
}
|
|
RoundSubtransfersMode::ByValue | RoundSubtransfersMode::ByValueAndSource | RoundSubtransfersMode::ByParcel => {
|
|
// Calculate votes_out for each column
|
|
for column in self.columns.iter_mut() {
|
|
// Calculate votes_out per candidate in the column
|
|
for (_candidate, cell) in column.cells.iter_mut() {
|
|
if is_weighted {
|
|
// Weighted rules
|
|
// Multiply votes in by surplus fraction
|
|
cell.votes_out = multiply_surpfrac(cell.votes_in.clone(), &self.surpfrac_numer, &self.surpfrac_denom);
|
|
} else if self.surpfrac.is_none() {
|
|
// Unweighted rules but transfer at values received
|
|
cell.votes_out = cell.votes_in.clone();
|
|
} else {
|
|
// Unweighted rules
|
|
// Multiply ballots in by surplus fraction
|
|
cell.votes_out = multiply_surpfrac(cell.ballots.clone(), &self.surpfrac_numer, &self.surpfrac_denom);
|
|
}
|
|
|
|
// Round if required
|
|
if let Some(dps) = opts.round_votes {
|
|
cell.votes_out.floor_mut(dps);
|
|
}
|
|
}
|
|
|
|
// Calculate exhausted votes in the column
|
|
if is_weighted {
|
|
// Weighted rules
|
|
// Multiply votes in by surplus fraction
|
|
column.exhausted.votes_out = multiply_surpfrac(column.exhausted.votes_in.clone(), &self.surpfrac_numer, &self.surpfrac_denom);
|
|
} else if self.surpfrac.is_none() {
|
|
// Unweighted rules but transfer at values received
|
|
// This can only happen with --transferable-only, so this will be calculated in apply_to
|
|
} else {
|
|
// Unweighted rules
|
|
// Multiply ballots in by surplus fraction
|
|
column.exhausted.votes_out = multiply_surpfrac(column.exhausted.ballots.clone(), &self.surpfrac_numer, &self.surpfrac_denom);
|
|
}
|
|
|
|
// Round if required
|
|
if let Some(dps) = opts.round_votes {
|
|
column.exhausted.votes_out.floor_mut(dps);
|
|
}
|
|
}
|
|
|
|
// Sum total votes_out per candidate
|
|
for (candidate, cell) in self.total.cells.iter_mut() {
|
|
cell.votes_out = self.columns.iter().fold(N::new(), |mut acc, col| {
|
|
if let Some(cell) = col.cells.get(candidate) {
|
|
acc += &cell.votes_out
|
|
}
|
|
acc
|
|
});
|
|
}
|
|
|
|
// Sum total exhausted votes
|
|
self.total.exhausted.votes_out = self.columns.iter().fold(N::new(), |mut acc, col| { acc += &col.exhausted.votes_out; acc });
|
|
}
|
|
RoundSubtransfersMode::PerBallot => {
|
|
// Calculate votes_out for each column
|
|
for column in self.columns.iter_mut() {
|
|
// Calculate votes_out per candidate in the column
|
|
for (_candidate, cell) in column.cells.iter_mut() {
|
|
if is_weighted {
|
|
// Weighted rules
|
|
// Multiply ballots in by new value fraction
|
|
let mut new_value_fraction = multiply_surpfrac(column.value_fraction.clone(), &self.surpfrac_numer, &self.surpfrac_denom);
|
|
if let Some(dps) = opts.round_values {
|
|
new_value_fraction.floor_mut(dps);
|
|
}
|
|
|
|
cell.votes_out = cell.ballots.clone() * new_value_fraction;
|
|
} else if self.surpfrac.is_none() {
|
|
// Unweighted rules but transfer at values received
|
|
cell.votes_out = cell.votes_in.clone();
|
|
} else {
|
|
// Unweighted rules
|
|
// Multiply ballots in by surplus fraction
|
|
cell.votes_out = multiply_surpfrac(cell.ballots.clone(), &self.surpfrac_numer, &self.surpfrac_denom);
|
|
}
|
|
|
|
// Round if required
|
|
if let Some(dps) = opts.round_votes {
|
|
cell.votes_out.floor_mut(dps);
|
|
}
|
|
}
|
|
|
|
// Calculate exhausted votes in the column
|
|
if is_weighted {
|
|
// Weighted rules
|
|
// Multiply ballots in by new value fraction
|
|
let mut new_value_fraction = multiply_surpfrac(column.value_fraction.clone(), &self.surpfrac_numer, &self.surpfrac_denom);
|
|
if let Some(dps) = opts.round_values {
|
|
new_value_fraction.floor_mut(dps);
|
|
}
|
|
|
|
column.exhausted.votes_out = column.exhausted.ballots.clone() * new_value_fraction;
|
|
} else if self.surpfrac.is_none() {
|
|
// Unweighted rules but transfer at values received
|
|
// This can only happen with --transferable-only, so this will be calculated in apply_to
|
|
} else {
|
|
// Unweighted rules
|
|
// Multiply ballots in by surplus fraction
|
|
column.exhausted.votes_out = multiply_surpfrac(column.exhausted.ballots.clone(), &self.surpfrac_numer, &self.surpfrac_denom);
|
|
}
|
|
|
|
// Round if required
|
|
if let Some(dps) = opts.round_votes {
|
|
column.exhausted.votes_out.floor_mut(dps);
|
|
}
|
|
}
|
|
|
|
// Sum total votes_out per candidate
|
|
for (candidate, cell) in self.total.cells.iter_mut() {
|
|
cell.votes_out = self.columns.iter().fold(N::new(), |mut acc, col| {
|
|
if let Some(cell) = col.cells.get(candidate) {
|
|
acc += &cell.votes_out;
|
|
}
|
|
acc
|
|
});
|
|
}
|
|
|
|
// Sum total exhausted votes
|
|
self.total.exhausted.votes_out = self.columns.iter().fold(N::new(), |mut acc, col| { acc += &col.exhausted.votes_out; acc });
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Apply the transfers described in the table to the count sheet
|
|
///
|
|
/// Credit continuing candidates and exhausted pile with the appropriate number of ballot papers and votes.
|
|
pub fn apply_to(&self, state: &mut CountState<N>, opts: &STVOptions) -> N {
|
|
let mut checksum = N::new();
|
|
|
|
// Credit transferred votes
|
|
for (candidate, count_card) in state.candidates.iter_mut() {
|
|
if let Some(cell) = self.total.cells.get(candidate) {
|
|
count_card.transfer(&cell.votes_out);
|
|
count_card.ballot_transfers += &cell.ballots;
|
|
checksum += &cell.votes_out;
|
|
}
|
|
}
|
|
|
|
// Credit exhausted votes
|
|
// If exclusion or not --transferable-only
|
|
if self.surplus.is_none() || !opts.transferable_only {
|
|
// Standard rules
|
|
state.exhausted.transfer(&self.total.exhausted.votes_out);
|
|
state.exhausted.ballot_transfers += &self.total.exhausted.ballots;
|
|
checksum += &self.total.exhausted.votes_out;
|
|
} else {
|
|
// Credit only nontransferable difference
|
|
if self.surpfrac_numer.is_none() {
|
|
// TODO: Is there a purer way of calculating this?
|
|
let difference = self.surplus.as_ref().unwrap().clone() - &checksum;
|
|
state.exhausted.transfer(&difference);
|
|
checksum += difference;
|
|
|
|
for column in self.columns.iter() {
|
|
state.exhausted.ballot_transfers += &column.exhausted.ballots;
|
|
}
|
|
} else {
|
|
// No ballots exhaust
|
|
}
|
|
}
|
|
|
|
return checksum;
|
|
}
|
|
|
|
/// Render table as [Table]
|
|
fn render(&self, opts: &STVOptions) -> Table {
|
|
let mut table = Table::new();
|
|
set_table_format(&mut table);
|
|
|
|
let show_transfers_per_column = opts.round_subtransfers != RoundSubtransfersMode::SingleStep;
|
|
|
|
let num_cols;
|
|
if show_transfers_per_column {
|
|
num_cols = self.columns.len() * 3 + 4;
|
|
} else {
|
|
if self.surpfrac.is_none() {
|
|
num_cols = self.columns.len() * 2 + 3;
|
|
} else {
|
|
num_cols = self.columns.len() * 2 + 4;
|
|
}
|
|
}
|
|
|
|
// ----------
|
|
// Header row
|
|
|
|
let mut row = Vec::with_capacity(num_cols);
|
|
row.push(Cell::new("Preference"));
|
|
for column in self.columns.iter() {
|
|
row.push(Cell::new(&format!("Ballots @ {:.dps2$}", column.value_fraction, dps2=max(opts.pp_decimals, 2))).style_spec("cH2"));
|
|
|
|
if show_transfers_per_column {
|
|
if self.surplus.is_some() {
|
|
row.push(Cell::new(&format!("× {:.dps2$}", self.surpfrac.as_ref().unwrap(), dps2=max(opts.pp_decimals, 2))).style_spec("r"));
|
|
} else {
|
|
row.push(Cell::new("=").style_spec("c"));
|
|
}
|
|
}
|
|
}
|
|
row.push(Cell::new("Total").style_spec("cH2"));
|
|
if self.surpfrac.is_some() {
|
|
row.push(Cell::new(&format!("× {:.dps2$}", self.surpfrac.as_ref().unwrap(), dps2=max(opts.pp_decimals, 2))).style_spec("r"));
|
|
} else if show_transfers_per_column {
|
|
row.push(Cell::new("=").style_spec("c"));
|
|
}
|
|
table.set_titles(Row::new(row));
|
|
|
|
// --------------
|
|
// Candidate rows
|
|
|
|
for candidate in self.hopefuls.iter() {
|
|
let mut row = Vec::with_capacity(num_cols);
|
|
row.push(Cell::new(&candidate.name));
|
|
for column in self.columns.iter() {
|
|
if let Some(cell) = column.cells.get(candidate) {
|
|
row.push(Cell::new(&format!("{:.0}", cell.ballots)).style_spec("r"));
|
|
row.push(Cell::new(&format!("{:.dps$}", cell.votes_in, dps=opts.pp_decimals)).style_spec("r"));
|
|
if show_transfers_per_column {
|
|
row.push(Cell::new(&format!("{:.dps$}", cell.votes_out, dps=opts.pp_decimals)).style_spec("r"));
|
|
}
|
|
} else {
|
|
row.push(Cell::new(""));
|
|
row.push(Cell::new(""));
|
|
if show_transfers_per_column {
|
|
row.push(Cell::new(""));
|
|
}
|
|
}
|
|
}
|
|
|
|
// Totals
|
|
if let Some(cell) = self.total.cells.get(candidate) {
|
|
row.push(Cell::new(&format!("{:.0}", cell.ballots)).style_spec("r"));
|
|
row.push(Cell::new(&format!("{:.dps$}", cell.votes_in, dps=opts.pp_decimals)).style_spec("r"));
|
|
if self.surpfrac.is_some() || show_transfers_per_column {
|
|
row.push(Cell::new(&format!("{:.dps$}", cell.votes_out, dps=opts.pp_decimals)).style_spec("r"));
|
|
}
|
|
} else {
|
|
row.push(Cell::new(""));
|
|
row.push(Cell::new(""));
|
|
if self.surpfrac.is_some() || show_transfers_per_column {
|
|
row.push(Cell::new(""));
|
|
}
|
|
}
|
|
|
|
table.add_row(Row::new(row));
|
|
}
|
|
|
|
// -------------
|
|
// Exhausted row
|
|
|
|
let mut row = Vec::with_capacity(num_cols);
|
|
row.push(Cell::new("Exhausted"));
|
|
for column in self.columns.iter() {
|
|
if !column.exhausted.ballots.is_zero() {
|
|
row.push(Cell::new(&format!("{:.0}", column.exhausted.ballots)).style_spec("r"));
|
|
row.push(Cell::new(&format!("{:.dps$}", column.exhausted.votes_in, dps=opts.pp_decimals)).style_spec("r"));
|
|
if show_transfers_per_column {
|
|
if column.exhausted.votes_out.is_zero() {
|
|
row.push(Cell::new("-").style_spec("c"));
|
|
} else {
|
|
row.push(Cell::new(&format!("{:.dps$}", column.exhausted.votes_out, dps=opts.pp_decimals)).style_spec("r"));
|
|
}
|
|
}
|
|
} else {
|
|
row.push(Cell::new(""));
|
|
row.push(Cell::new(""));
|
|
if show_transfers_per_column {
|
|
row.push(Cell::new(""));
|
|
}
|
|
}
|
|
}
|
|
|
|
// Totals
|
|
if !self.total.exhausted.ballots.is_zero() {
|
|
row.push(Cell::new(&format!("{:.0}", self.total.exhausted.ballots)).style_spec("r"));
|
|
row.push(Cell::new(&format!("{:.dps$}", self.total.exhausted.votes_in, dps=opts.pp_decimals)).style_spec("r"));
|
|
if self.surpfrac.is_some() || show_transfers_per_column {
|
|
if self.total.exhausted.votes_out.is_zero() {
|
|
row.push(Cell::new("-").style_spec("c"));
|
|
} else {
|
|
row.push(Cell::new(&format!("{:.dps$}", self.total.exhausted.votes_out, dps=opts.pp_decimals)).style_spec("r"));
|
|
}
|
|
}
|
|
} else {
|
|
row.push(Cell::new(""));
|
|
row.push(Cell::new(""));
|
|
if self.surpfrac.is_some() || show_transfers_per_column {
|
|
row.push(Cell::new(""));
|
|
}
|
|
}
|
|
|
|
table.add_row(Row::new(row));
|
|
|
|
// ----------
|
|
// Totals row
|
|
|
|
let mut row = Vec::with_capacity(num_cols);
|
|
row.push(Cell::new("Total"));
|
|
|
|
for column in self.columns.iter() {
|
|
row.push(Cell::new(&format!("{:.0}", column.total.ballots)).style_spec("r"));
|
|
row.push(Cell::new(&format!("{:.dps$}", column.total.votes_in, dps=opts.pp_decimals)).style_spec("r"));
|
|
if show_transfers_per_column {
|
|
row.push(Cell::new(&format!("{:.dps$}", column.total.votes_out, dps=opts.pp_decimals)).style_spec("r"));
|
|
}
|
|
}
|
|
|
|
// Grand total cell
|
|
|
|
let mut gt_ballots = N::new();
|
|
let mut gt_votes_in = N::new();
|
|
let mut gt_votes_out = N::new();
|
|
|
|
for candidate in self.hopefuls.iter() {
|
|
if let Some(cell) = self.total.cells.get(candidate) {
|
|
gt_ballots += &cell.ballots;
|
|
gt_votes_in += &cell.votes_in;
|
|
gt_votes_out += &cell.votes_out;
|
|
}
|
|
}
|
|
gt_ballots += &self.total.exhausted.ballots;
|
|
gt_votes_in += &self.total.exhausted.votes_in;
|
|
gt_votes_out += &self.total.exhausted.votes_out;
|
|
|
|
row.push(Cell::new(&format!("{:.0}", gt_ballots)).style_spec("r"));
|
|
row.push(Cell::new(&format!("{:.dps$}", gt_votes_in, dps=opts.pp_decimals)).style_spec("r"));
|
|
if self.surpfrac.is_some() || show_transfers_per_column {
|
|
row.push(Cell::new(&format!("{:.dps$}", gt_votes_out, dps=opts.pp_decimals)).style_spec("r"));
|
|
}
|
|
|
|
table.add_row(Row::new(row));
|
|
|
|
return table;
|
|
}
|
|
|
|
/// Render table as plain text
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
pub fn render_text(&self, opts: &STVOptions) -> String {
|
|
return self.render(opts).to_string();
|
|
}
|
|
|
|
/// Render table as HTML
|
|
#[cfg(target_arch = "wasm32")]
|
|
pub fn render_text(&self, opts: &STVOptions) -> String {
|
|
return self.render(opts).to_html();
|
|
}
|
|
|
|
// Render table as HTML
|
|
//pub fn render_html(&self, opts: &STVOptions) -> String {
|
|
// return self.render(opts).to_string();
|
|
//}
|
|
}
|
|
|
|
/// Multiply the specified number by the surplus fraction (if applicable)
|
|
fn multiply_surpfrac<N: Number>(mut number: N, surpfrac_numer: &Option<N>, surpfrac_denom: &Option<N>) -> N {
|
|
if let Some(n) = surpfrac_numer {
|
|
number *= n;
|
|
}
|
|
if let Some(n) = surpfrac_denom {
|
|
number /= n;
|
|
}
|
|
return number;
|
|
}
|
|
|
|
/// Column in a [TransferTable]
|
|
#[derive(Clone)]
|
|
pub struct TransferTableColumn<'e, N: Number> {
|
|
/// Value fraction of ballots counted in this column
|
|
pub value_fraction: N,
|
|
|
|
/// Number to separate parcels in modes where subtransfers by parcel, etc.
|
|
pub order: usize,
|
|
|
|
/// Cells in this column
|
|
pub cells: CandidateMap<'e, TransferTableCell<N>>,
|
|
|
|
/// Exhausted cell
|
|
pub exhausted: TransferTableCell<N>,
|
|
|
|
/// Totals cell
|
|
pub total: TransferTableCell<N>,
|
|
}
|
|
|
|
impl<'e, N: Number> TransferTableColumn<'e, N> {
|
|
/// Record the specified transfer
|
|
pub fn add_transfers(&mut self, candidate: &'e Candidate, ballots: &N) {
|
|
if let Some(cell) = self.cells.get_mut(candidate) {
|
|
cell.ballots += ballots;
|
|
} else {
|
|
let cell = TransferTableCell {
|
|
ballots: ballots.clone(),
|
|
votes_in: N::new(),
|
|
votes_out: N::new(),
|
|
};
|
|
self.cells.insert(candidate, cell);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Cell in a [TransferTable], representing transfers to one candidate at a particular value
|
|
#[derive(Clone)]
|
|
pub struct TransferTableCell<N: Number> {
|
|
/// Ballots expressing a next preference for the continuing candidate
|
|
pub ballots: N,
|
|
/// Value of votes when received by the transferring candidate
|
|
pub votes_in: N,
|
|
/// Votes transferred to the continuing candidate
|
|
pub votes_out: N,
|
|
}
|
|
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
fn set_table_format(table: &mut Table) {
|
|
table.set_format(*prettytable::format::consts::FORMAT_NO_LINESEP_WITH_TITLE);
|
|
}
|
|
|
|
#[cfg(target_arch = "wasm32")]
|
|
fn set_table_format(_table: &mut Table) {
|
|
// No op
|
|
}
|