95 lines
2.7 KiB
Rust
95 lines
2.7 KiB
Rust
/// Convenience wrapper for String-being-a-hash
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#[derive(Debug, Clone, PartialEq, Eq, Hash)]
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pub struct ScopeHash(String);
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impl ScopeHash {
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#[cfg(feature = "scope")]
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pub fn new(scope: &super::ArbitraryScope, config: &crate::config::SabryHashConfig) -> Self {
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use base64::Engine;
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use raffia::ast::InterpolableIdent;
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use std::hash::Hasher;
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use crate::scoper::sanitize_css_member;
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let mut hasher = std::hash::DefaultHasher::new();
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if config.use_scope_name {
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hasher.write(scope.name.to_string().as_bytes());
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}
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if config.use_code_text {
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hasher.write(scope.adapter().source().as_bytes());
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}
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if config.use_code_size {
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hasher.write(&scope.adapter().source().len().to_ne_bytes());
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}
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if config.use_item_names {
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let classes = scope.adapter().class_selectors();
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let ids = scope.adapter().id_selectors();
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//# types/tags dont participate
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//# child-parent dont participate
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let merged_items = classes
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.iter()
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.map(|s| &s.name)
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.chain(ids.iter().map(|i| &i.name))
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.map(|ident| match ident {
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InterpolableIdent::Literal(lit) => Some(lit),
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_ => None,
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})
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.filter_map(|mbl| mbl.map(|l| l.raw))
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.collect::<String>();
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hasher.write(merged_items.as_bytes());
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}
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let hash = hasher.finish().to_be_bytes();
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let hash = base64::prelude::BASE64_URL_SAFE_NO_PAD.encode(hash);
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let hash = sanitize_css_member(&hash);
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Self(hash)
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}
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pub fn as_str(&self) -> &str {
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&self.0
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}
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#[cfg(test)]
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pub fn test_init(v: String) -> Self {
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Self(v)
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}
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}
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#[cfg(test)]
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mod test {
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use syn::Ident;
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use crate::{
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config::SabryHashConfig, scoper::ArbitraryScope, syntax::ostrta::OneSyntaxToRuleThemAll,
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};
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use super::ScopeHash;
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#[test]
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fn hash_matches() {
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let source = ".cls1{color:red; &-dark{color: black} #id1 {color:green;} div {color:blue;}} .cls3#id2{color: black;}";
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let scope1 = ArbitraryScope::from_source(
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OneSyntaxToRuleThemAll::Scss,
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syn::parse_str::<Ident>("lasifudm").unwrap(),
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source,
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)
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.unwrap();
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let hash1 = ScopeHash::new(&scope1, &SabryHashConfig::default());
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let scope2 = ArbitraryScope::from_source(
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OneSyntaxToRuleThemAll::Scss,
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syn::parse_str::<Ident>("lasifudm").unwrap(),
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source,
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)
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.unwrap();
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let hash2 = ScopeHash::new(&scope2, &SabryHashConfig::default());
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assert_eq!(hash1, hash2);
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}
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}
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