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use std::num::ParseFloatError;
use std::str::FromStr;
use iced::Padding;
use super::ValueFromStr;
#[derive(Debug, thiserror::Error)]
pub enum PaddingError {
#[error("wrong number of values")]
WrongNumberOfValues,
#[error("float parsing error: {0}")]
ParseFloatError(ParseFloatError),
#[error("missing bracket")]
MissingBracket,
#[error("empty string given")]
Empty,
}
impl From<ParseFloatError> for PaddingError {
fn from(value: ParseFloatError) -> Self {
Self::ParseFloatError(value)
}
}
impl ValueFromStr for Padding {
type Err = PaddingError;
fn value_from_str(s: &str) -> Result<Self, Self::Err> {
if s.is_empty() {
return Err(PaddingError::Empty);
}
let values = s
.strip_prefix('[')
.ok_or(PaddingError::MissingBracket)?
.strip_suffix(']')
.ok_or(PaddingError::MissingBracket)?
.split(',')
.map(|n| f32::from_str(n))
.collect::<Result<Vec<_>, _>>()?;
match values.len() {
1 => Ok(Padding {
top: values[0],
right: values[0],
bottom: values[0],
left: values[0],
}),
2 => Ok(Padding {
top: values[0],
right: values[1],
bottom: values[0],
left: values[1],
}),
3 => Ok(Padding {
top: values[0],
right: values[1],
bottom: values[2],
left: values[1],
}),
4 => Ok(Padding {
top: values[0],
right: values[1],
bottom: values[2],
left: values[3],
}),
_ => Err(PaddingError::WrongNumberOfValues),
}
}
}
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