/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */


use std::ascii::StrAsciiExt;
use cssparser::ast::{ComponentValue, Ident, SkipWhitespaceIterable};


pub fn one_component_value<'a>(input: &'a [ComponentValue]) -> Option<&'a ComponentValue> {
    let mut iter = input.skip_whitespace();
    iter.next().filtered(|_| iter.next().is_none())
}


pub fn get_ident_lower(component_value: &ComponentValue) -> Option<~str> {
    match component_value {
        &Ident(ref value) => Some(value.to_ascii_lower()),
        _ => None,
    }
}