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use crate::dependencies::{Dependency, Location, UrlDependency};
use crate::error::{ParserError, PrinterError};
use crate::printer::Printer;
use crate::traits::{Parse, ToCss};
use crate::values::string::CowArcStr;
use cssparser::*;
#[derive(Debug, Clone, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct Url<'i> {
#[cfg_attr(feature = "serde", serde(borrow))]
pub url: CowArcStr<'i>,
pub loc: Location,
}
impl<'i> Parse<'i> for Url<'i> {
fn parse<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
let loc = input.current_source_location();
let url = input.expect_url()?.into();
Ok(Url { url, loc: loc.into() })
}
}
impl<'i> ToCss for Url<'i> {
fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
where
W: std::fmt::Write,
{
let dep = if dest.dependencies.is_some() {
Some(UrlDependency::new(self, dest.filename()))
} else {
None
};
if let Some(dep) = dep {
dest.write_str("url(")?;
serialize_string(&dep.placeholder, dest)?;
dest.write_char(')')?;
if let Some(dependencies) = &mut dest.dependencies {
dependencies.push(Dependency::Url(dep))
}
return Ok(());
}
use cssparser::ToCss;
if dest.minify {
let mut buf = String::new();
Token::UnquotedUrl(CowRcStr::from(self.url.as_ref())).to_css(&mut buf)?;
if buf.len() > self.url.len() + 7 {
let mut buf2 = String::new();
serialize_string(&self.url, &mut buf2)?;
if buf2.len() + 5 < buf.len() {
dest.write_str("url(")?;
dest.write_str(&buf2)?;
return dest.write_char(')');
}
}
dest.write_str(&buf)?;
} else {
dest.write_str("url(")?;
serialize_string(&self.url, dest)?;
dest.write_char(')')?;
}
Ok(())
}
}
impl<'i> Url<'i> {
pub fn is_absolute(&self) -> bool {
let url = self.url.as_ref();
if url.starts_with('.') {
return false;
}
if url.starts_with('/') {
return true;
}
if url.starts_with('#') {
return true;
}
if !url.starts_with(|c| matches!(c, 'a'..='z' | 'A'..='Z')) {
return false;
}
for b in url.as_bytes() {
let c = *b as char;
match c {
'a'..='z' | 'A'..='Z' | '0'..='9' | '+' | '-' | '.' => {}
':' => return true,
_ => break,
}
}
false
}
}