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use super::calc::Calc;
use crate::error::{ParserError, PrinterError};
use crate::printer::Printer;
use crate::traits::{Parse, ToCss};
use cssparser::*;
pub type CSSNumber = f32;
impl<'i> Parse<'i> for CSSNumber {
fn parse<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
match input.try_parse(Calc::parse) {
Ok(Calc::Value(v)) => return Ok(*v),
Ok(Calc::Number(n)) => return Ok(n),
Ok(_) => unreachable!(),
_ => {}
}
let number = input.expect_number()?;
Ok(number)
}
}
impl ToCss for CSSNumber {
fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
where
W: std::fmt::Write,
{
let number = *self;
if number != 0.0 && number.abs() < 1.0 {
let mut s = String::new();
cssparser::ToCss::to_css(self, &mut s)?;
if number < 0.0 {
dest.write_char('-')?;
dest.write_str(s.trim_start_matches("-0"))
} else {
dest.write_str(s.trim_start_matches('0'))
}
} else {
cssparser::ToCss::to_css(self, dest)?;
Ok(())
}
}
}
impl std::convert::Into<Calc<CSSNumber>> for CSSNumber {
fn into(self) -> Calc<CSSNumber> {
Calc::Value(Box::new(self))
}
}
impl std::convert::From<Calc<CSSNumber>> for CSSNumber {
fn from(calc: Calc<CSSNumber>) -> CSSNumber {
match calc {
Calc::Value(v) => *v,
_ => unreachable!(),
}
}
}
pub type CSSInteger = i32;
impl<'i> Parse<'i> for CSSInteger {
fn parse<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
let integer = input.expect_integer()?;
Ok(integer)
}
}
impl ToCss for CSSInteger {
fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
where
W: std::fmt::Write,
{
cssparser::ToCss::to_css(self, dest)?;
Ok(())
}
}