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use crate::{Error, Stream};
#[allow(missing_docs)]
#[derive(Clone, Copy, PartialEq, Debug)]
pub enum Align {
None,
XMinYMin,
XMidYMin,
XMaxYMin,
XMinYMid,
XMidYMid,
XMaxYMid,
XMinYMax,
XMidYMax,
XMaxYMax,
}
#[derive(Clone, Copy, PartialEq, Debug)]
pub struct AspectRatio {
pub defer: bool,
pub align: Align,
pub slice: bool,
}
impl std::str::FromStr for AspectRatio {
type Err = Error;
fn from_str(text: &str) -> Result<Self, Error> {
let mut s = Stream::from(text);
s.skip_spaces();
let defer = s.starts_with(b"defer");
if defer {
s.advance(5);
s.consume_byte(b' ')?;
s.skip_spaces();
}
let start = s.pos();
let align = s.consume_ident();
let align = match align {
"none" => Align::None,
"xMinYMin" => Align::XMinYMin,
"xMidYMin" => Align::XMidYMin,
"xMaxYMin" => Align::XMaxYMin,
"xMinYMid" => Align::XMinYMid,
"xMidYMid" => Align::XMidYMid,
"xMaxYMid" => Align::XMaxYMid,
"xMinYMax" => Align::XMinYMax,
"xMidYMax" => Align::XMidYMax,
"xMaxYMax" => Align::XMaxYMax,
_ => {
return Err(Error::UnexpectedData(s.calc_char_pos_at(start)))
}
};
s.skip_spaces();
let mut slice = false;
if !s.at_end() {
let start = s.pos();
let v = s.consume_ident();
match v {
"meet" => {}
"slice" => slice = true,
"" => {}
_ => {
return Err(Error::UnexpectedData(s.calc_char_pos_at(start)))
}
};
}
Ok(AspectRatio {
defer,
align,
slice,
})
}
}
impl Default for AspectRatio {
#[inline]
fn default() -> Self {
AspectRatio {
defer: false,
align: Align::XMidYMid,
slice: false,
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use std::str::FromStr;
macro_rules! test {
($name:ident, $text:expr, $result:expr) => (
#[test]
fn $name() {
let v = AspectRatio::from_str($text).unwrap();
assert_eq!(v, $result);
}
)
}
test!(parse_1, "none", AspectRatio {
defer: false,
align: Align::None,
slice: false,
});
test!(parse_2, "defer none", AspectRatio {
defer: true,
align: Align::None,
slice: false,
});
test!(parse_3, "xMinYMid", AspectRatio {
defer: false,
align: Align::XMinYMid,
slice: false,
});
test!(parse_4, "xMinYMid slice", AspectRatio {
defer: false,
align: Align::XMinYMid,
slice: true,
});
test!(parse_5, "xMinYMid meet", AspectRatio {
defer: false,
align: Align::XMinYMid,
slice: false,
});
}