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|
use std::fmt;
use crate::bitmap::MapPoint;
#[derive(Debug, Copy, Clone)]
pub enum Brush {
Line {
size: u8,
start: Option<MapPoint>,
extend: bool,
},
Circle {
size: u8,
},
RectSelect {
start: MapPoint,
end: MapPoint,
},
Fill,
Custom {
size: u8,
},
}
impl Brush {
pub fn grow(&mut self) -> Result<(), BrushError> {
match self {
Brush::Line { ref mut size, .. } => *size += 1,
Brush::Circle { ref mut size, .. } => *size += 1,
Brush::Custom { ref mut size, .. } => *size += 1,
_ => return Err(BrushError::CannotIncreaseSize),
}
Ok(())
}
pub fn shrink(&mut self) -> Result<(), BrushError> {
match self {
Brush::Line { ref mut size, .. } => *size += size.saturating_sub(1),
Brush::Circle { ref mut size, .. } => *size += size.saturating_sub(1),
Brush::Custom { ref mut size, .. } => *size += size.saturating_sub(1),
_ => return Err(BrushError::CannotIncreaseSize),
}
Ok(())
}
pub fn new() -> Self {
Brush::Circle { size: 0 }
}
pub fn line(size: u8, extend: bool) -> Self {
Brush::Line {
size,
start: None,
extend,
}
}
pub fn is_line(&self) -> bool {
matches!(self, Self::Line { .. })
}
}
impl fmt::Display for Brush {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Brush::Line { extend, .. } => write!(f, "LINE{}", if *extend { "+" } else { "" }),
Brush::Circle { .. } => write!(f, "CIRCLE"),
Brush::RectSelect { .. } => write!(f, "SELECT"),
Brush::Fill => write!(f, "FILL"),
Brush::Custom { .. } => write!(f, "CUSTOM"),
}
}
}
pub enum BrushError {
CannotIncreaseSize,
}
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