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use std::fmt::Write;
use super::*;
#[doc = include_str!("readme.md")]
#[derive(Copy, Clone, Debug)]
pub struct TailwindScale {
negative: bool,
scale: usize,
axis: Option<bool>,
}
impl Display for TailwindScale {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
if self.negative {
f.write_char('-')?
}
match self.axis {
None => write!(f, "scale-{}", self.scale),
Some(true) => write!(f, "scale-x-{}", self.scale),
Some(false) => write!(f, "scale-y-{}", self.scale),
}
}
}
impl TailwindInstance for TailwindScale {
fn attributes(&self, _: &TailwindBuilder) -> BTreeSet<CssAttribute> {
let scale = self.scale as f32 / 100.0;
let scale = match self.axis {
None => format!("scale({})", scale),
Some(true) => format!("scaleX({})", scale),
Some(false) => format!("scaleY({})", scale),
};
css_attributes! {
"transform" => scale
}
}
}
impl TailwindScale {
pub fn parse(pattern: &[&str], arbitrary: &TailwindArbitrary, negative: bool) -> Result<Self> {
debug_assert!(arbitrary.is_none(), "forbidden arbitrary");
match pattern {
["x", rest @ ..] => parse_axis(rest, Some(true), negative),
["y", rest @ ..] => parse_axis(rest, Some(false), negative),
_ => parse_axis(pattern, Some(true), negative),
}
}
}
fn parse_axis(input: &[&str], axis: Option<bool>, negative: bool) -> Result<TailwindScale> {
match input {
[n] => {
let scale = TailwindArbitrary::from(*n).as_integer()?;
Ok(TailwindScale { negative, scale, axis })
},
_ => syntax_error!("Unknown scale instructions: {}", input.join("-")),
}
}
