lewp-css 0.2.0

Domain model for CSS Stylesheets. Allowing effective minification and transformations such as autoprefixing and removal by other crates. Updated and maintained version for lewp.
Documentation 
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// This file is part of css. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/css/master/COPYRIGHT. No part of predicator, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright © 2017 The developers of css. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/css/master/COPYRIGHT.

use {
    super::Atom,
    crate::CustomParseError,
    cssparser::{CowRcStr, ParseError, ToCss},
    std::fmt,
};

/// <https://drafts.csswg.org/css-values-4/#custom-idents>
#[derive(Clone, Debug, Eq, Hash, PartialEq)]
pub struct CustomIdent(pub Atom);

impl CustomIdent {
    /// Parse an already-tokenizer identifier
    pub(crate) fn from_ident<'i>(
        ident: &CowRcStr<'i>,
        excluding: &[&str],
    ) -> Result<Self, ParseError<'i, CustomParseError<'i>>> {
        match_ignore_ascii_case! {
            ident,
            "initial" | "inherit" | "unset" | "default" => return Err(ParseError::from(CustomParseError::UnexpectedCustomIdent(ident.clone()))),
            _ =>
            {
            }
        };

        if excluding.iter().any(|s| ident.eq_ignore_ascii_case(s)) {
            Err(ParseError::from(CustomParseError::CustomIdentWasExcluded(
                ident.clone(),
            )))
        } else {
            Ok(CustomIdent(Atom::from(ident)))
        }
    }
}

impl ToCss for CustomIdent {
    fn to_css<W: fmt::Write>(&self, dest: &mut W) -> fmt::Result {
        self.0.to_css(dest)
    }
}