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use std::collections::HashSet;
use std::ops::Range;
use crate::errors::{GobanError, UsageError};
use crate::goban::Goban;
use crate::RenderOptions;
#[derive(Debug, Clone, Default)]
pub enum GobanRange {
ShrinkWrap,
#[default]
FullBoard,
Ranged(Range<u8>, Range<u8>),
}
impl GobanRange {
pub fn get_ranges(
&self,
goban: &Goban,
options: &RenderOptions,
) -> Result<(Range<u8>, Range<u8>), GobanError> {
let goban_size = goban.size();
match self {
Self::FullBoard => Ok((0..goban_size.0, 0..goban_size.1)),
Self::ShrinkWrap => {
let mut points: HashSet<_> = goban.stones().map(|s| (s.x, s.y)).collect();
if options.draw_marks {
points.extend(goban.marks());
}
if options.draw_triangles {
points.extend(goban.triangles());
}
if options.draw_circles {
points.extend(goban.circles());
}
if options.draw_squares {
points.extend(goban.squares());
}
if options.draw_selected {
points.extend(goban.selected());
}
if options.draw_labels {
points.extend(goban.labels().map(|(p, _)| p))
}
if options.draw_lines {
points.extend(goban.lines().flat_map(|(p1, p2)| vec![p1, p2]))
}
if options.draw_arrows {
points.extend(goban.arrows().flat_map(|(p1, p2)| vec![p1, p2]))
}
// Don't necessarily include dimmed points!
let x_start = {
let p = points
.iter()
.map(|&(x, _)| x)
.min()
.unwrap_or(0)
.saturating_sub(1);
if p == 1 {
0 // Include nearby board edge.
} else {
p
}
};
let x_end = {
let p = points
.iter()
.map(|&(x, _)| (x + 2).min(goban_size.0))
.max()
.unwrap_or(goban_size.0);
if p == goban_size.0 - 1 {
goban_size.0 // Include nearby board edge.
} else {
p
}
};
let y_start = {
let p = points
.iter()
.map(|&(_, y)| y)
.min()
.unwrap_or(0)
.saturating_sub(1);
if p == 1 {
0 // Include nearby board edge.
} else {
p
}
};
let y_end = {
let p = points
.iter()
.map(|&(_, y)| (y + 2).min(goban_size.1))
.max()
.unwrap_or(goban_size.1);
if p == goban_size.1 - 1 {
goban_size.1 // Include nearby board edge.
} else {
p
}
};
Ok((x_start..x_end, y_start..y_end))
}
Self::Ranged(a, b) => {
if a.end > goban_size.0 || b.end > goban_size.1 {
Err(GobanError::InvalidRange)
} else {
Ok((a.clone(), b.clone()))
}
}
}
}
}
impl std::str::FromStr for GobanRange {
type Err = UsageError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let parse_byte = |b: u8| match b {
b'a'..=b'z' => Ok(b - b'a'),
_ => Err(UsageError::InvalidRange),
};
let s = s.as_bytes();
if s.len() != 5 || s[2] != b'-' {
return Err(UsageError::InvalidRange);
}
Ok(GobanRange::Ranged(
parse_byte(s[0])?..parse_byte(s[3])? + 1,
parse_byte(s[1])?..parse_byte(s[4])? + 1,
))
}
}