lewp_css/domain/at_rules/keyframes/
keyframes_at_rule.rs

1// 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.
2// 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.
3
4use {
5    super::{Keyframe, KeyframeSelector, KeyframesName},
6    crate::domain::{
7        at_rules::VendorPrefixedAtRule,
8        HasVendorPrefix,
9        VendorPrefix,
10    },
11    cssparser::ToCss,
12    std::fmt,
13};
14
15/// A [`@keyframes`](crate::domain::CssRule::Keyframes) rule.
16/// Keyframes: <https://drafts.csswg.org/css-animations/#keyframes>
17#[derive(Debug, Clone)]
18pub struct KeyframesAtRule {
19    /// Vendor prefix type the @keyframes has.
20    pub vendor_prefix: Option<VendorPrefix>,
21
22    /// The name of the current animation.
23    pub name: KeyframesName,
24
25    /// The keyframes specified for this CSS rule.
26    pub keyframes: Vec<Keyframe>,
27}
28
29impl ToCss for KeyframesAtRule {
30    fn to_css<W: fmt::Write>(&self, dest: &mut W) -> fmt::Result {
31        dest.write_str("@")?;
32        if let Some(ref vendor_prefix) = self.vendor_prefix {
33            vendor_prefix.to_css(dest)?;
34        }
35        dest.write_str("keyframes ")?;
36        self.name.to_css(dest)?;
37        dest.write_char('{')?;
38        for keyframe in self.keyframes.iter() {
39            keyframe.to_css(dest)?;
40        }
41        dest.write_char('}')
42    }
43}
44
45impl HasVendorPrefix for KeyframesAtRule {
46    #[inline(always)]
47    fn isNotVendorPrefixed(&self) -> bool {
48        self.vendor_prefix.is_none()
49    }
50}
51
52impl VendorPrefixedAtRule for KeyframesAtRule {}
53
54impl KeyframesAtRule {
55    /// Returns the index of the last keyframe that matches the given selector.
56    /// If the selector is not valid, or no keyframe is found, returns None.
57    ///
58    /// Related spec: <https://drafts.csswg.org/css-animations-1/#interface-csskeyframesrule-findrule>
59    pub fn find_rule(&self, selector: KeyframeSelector) -> Option<usize> {
60        for (index, keyframe) in self.keyframes.iter().enumerate().rev() {
61            if keyframe.selector == selector {
62                return Some(index);
63            }
64        }
65        None
66    }
67}
lewp_css/domain/at_rules/keyframes/keyframes_at_rule.rs

lewp_css/domain/at_rules/keyframes/
keyframes_at_rule.rs
