css 0.0.22

A crate that uses the cssparser and selectors crates to provide a domain model for CSS Stylesheets. Intended to allow effective minification of CSS and CSS transformations such as autoprefixing and removal by other crates
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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.


/// A [`@keyframes`][keyframes] rule.
/// [keyframes]: https://drafts.csswg.org/css-animations/#keyframes
#[derive(Debug, Clone)]
pub struct KeyframesAtRule
{
	/// Vendor prefix type the @keyframes has.
	pub vendor_prefix: Option<VendorPrefix>,
	
	/// The name of the current animation.
	pub name: KeyframesName,
	
	/// The keyframes specified for this CSS rule.
	pub keyframes: Vec<Keyframe>,
}

impl ToCss for KeyframesAtRule
{
	fn to_css<W: fmt::Write>(&self, dest: &mut W) -> fmt::Result
	{
		dest.write_str("@")?;
		if let Some(ref vendor_prefix) = self.vendor_prefix
		{
			vendor_prefix.to_css(dest)?;
		}
		dest.write_str("keyframes ")?;
		self.name.to_css(dest)?;
		dest.write_char('{')?;
		for keyframe in self.keyframes.iter()
		{
			keyframe.to_css(dest)?;
		}
		dest.write_char('}')
	}
}

impl HasVendorPrefix for KeyframesAtRule
{
	#[inline(always)]
	fn isNotVendorPrefixed(&self) -> bool
	{
		self.vendor_prefix.is_none()
	}
}

impl VendorPrefixedAtRule for KeyframesAtRule
{
}

impl KeyframesAtRule
{
	/// Returns the index of the last keyframe that matches the given selector.
	/// If the selector is not valid, or no keyframe is found, returns None.
	///
	/// Related spec: https://drafts.csswg.org/css-animations-1/#interface-csskeyframesrule-findrule
	pub fn find_rule(&self, selector: KeyframeSelector) -> Option<usize>
	{
		for (index, keyframe) in self.keyframes.iter().enumerate().rev()
		{
			if keyframe.selector == selector
			{
				return Some(index);
			}
		}
		None
	}
}