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Elide the explicit any namespace prefix when lacking default namespace.
Once again it seems we don't need to preserve the original prefix name,
and this lets to_css serialize to the shortest form when there is no
default namespace and the *| prefix is used.
Selectors § 6.1.1 says:
Element type selectors that have no namespace component (no namespace
separator) represent elements without regard to the element's namespace
(equivalent to "*|") unless a default namespace has been declared for
namespaced selectors (e.g. in CSS, in the style sheet). If a default
namespace has been declared, such selectors will represent only elements
in the default namespace.
Then if there is no default namespace, *| (which we write as
QNamePrefix::ExplicitAnyNamespace) is equivalent to what we write as
QNamePrefix::ImplicitAnyNamespace; the latter has a shorter
serialization, so we should use that.
This commit is contained in:
Jonathan Chan
parent
bd5ff3b4ce
commit
989b707623
3 changed files with 90 additions and 98 deletions
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@ -1026,7 +1026,21 @@ fn parse_type_selector<'i, 't, P, E, Impl, S>(parser: &P, input: &mut CssParser<
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sink.push(Component::ExplicitNoNamespace)
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}
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QNamePrefix::ExplicitAnyNamespace => {
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sink.push(Component::ExplicitAnyNamespace)
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match parser.default_namespace() {
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// Element type selectors that have no namespace
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// component (no namespace separator) represent elements
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// without regard to the element's namespace (equivalent
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// to "*|") unless a default namespace has been declared
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// for namespaced selectors (e.g. in CSS, in the style
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// sheet). If a default namespace has been declared,
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// such selectors will represent only elements in the
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// default namespace.
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// -- Selectors § 6.1.1
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// So we'll have this act the same as the
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// QNamePrefix::ImplicitAnyNamespace case.
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None => {},
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Some(_) => sink.push(Component::ExplicitAnyNamespace),
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}
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}
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QNamePrefix::ImplicitNoNamespace => {
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unreachable!() // Not returned with in_attr_selector = false
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@ -1643,6 +1657,15 @@ pub mod tests {
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ns_prefixes: HashMap<DummyAtom, DummyAtom>,
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}
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impl DummyParser {
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fn default_with_namespace(default_ns: DummyAtom) -> DummyParser {
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DummyParser {
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default_ns: Some(default_ns),
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ns_prefixes: Default::default(),
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}
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}
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}
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impl SelectorImpl for DummySelectorImpl {
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type AttrValue = DummyAtom;
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type Identifier = DummyAtom;
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@ -1732,19 +1755,40 @@ pub mod tests {
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}
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}
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fn parse<'i>(input: &'i str) -> Result<SelectorList<DummySelectorImpl>,
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ParseError<'i, SelectorParseError<'i, ()>>> {
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fn parse<'i>(input: &'i str)
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-> Result<SelectorList<DummySelectorImpl>, ParseError<'i, SelectorParseError<'i, ()>>> {
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parse_ns(input, &DummyParser::default())
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}
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fn parse_expected<'i, 'a>(input: &'i str, expected: Option<&'a str>)
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-> Result<SelectorList<DummySelectorImpl>, ParseError<'i, SelectorParseError<'i, ()>>> {
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parse_ns_expected(input, &DummyParser::default(), expected)
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}
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fn parse_ns<'i>(input: &'i str, parser: &DummyParser)
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-> Result<SelectorList<DummySelectorImpl>,
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ParseError<'i, SelectorParseError<'i, ()>>> {
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-> Result<SelectorList<DummySelectorImpl>, ParseError<'i, SelectorParseError<'i, ()>>> {
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parse_ns_expected(input, parser, None)
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}
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fn parse_ns_expected<'i, 'a>(
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input: &'i str,
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parser: &DummyParser,
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expected: Option<&'a str>
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) -> Result<SelectorList<DummySelectorImpl>, ParseError<'i, SelectorParseError<'i, ()>>> {
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let mut parser_input = ParserInput::new(input);
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let result = SelectorList::parse(parser, &mut CssParser::new(&mut parser_input));
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if let Ok(ref selectors) = result {
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assert_eq!(selectors.0.len(), 1);
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assert_eq!(selectors.0[0].to_css_string(), input);
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// We can't assume that the serialized parsed selector will equal
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// the input; for example, if there is no default namespace, '*|foo'
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// should serialize to 'foo'.
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assert_eq!(
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selectors.0[0].to_css_string(),
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match expected {
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Some(x) => x,
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None => input
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}
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);
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}
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result
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}
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@ -1783,16 +1827,34 @@ pub mod tests {
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lower_name: DummyAtom::from("e")
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})), specificity(0, 0, 1))
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))));
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// https://github.com/servo/servo/issues/16020
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assert_eq!(parse("*|e"), Ok(SelectorList::from_vec(vec!(
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// When the default namespace is not set, *| should be elided.
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// https://github.com/servo/servo/pull/17537
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assert_eq!(parse_expected("*|e", Some("e")), Ok(SelectorList::from_vec(vec!(
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Selector::from_vec(vec!(
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Component::ExplicitAnyNamespace,
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Component::LocalName(LocalName {
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name: DummyAtom::from("e"),
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lower_name: DummyAtom::from("e")
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})
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), specificity(0, 0, 1))
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))));
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// When the default namespace is set, *| should _not_ be elided (as foo
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// is no longer equivalent to *|foo--the former is only for foo in the
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// default namespace).
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// https://github.com/servo/servo/issues/16020
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assert_eq!(
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parse_ns(
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"*|e",
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&DummyParser::default_with_namespace(DummyAtom::from("https://mozilla.org"))
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),
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Ok(SelectorList::from_vec(vec!(
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Selector::from_vec(vec!(
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Component::ExplicitAnyNamespace,
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Component::LocalName(LocalName {
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name: DummyAtom::from("e"),
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lower_name: DummyAtom::from("e")
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})
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), specificity(0, 0, 1)))))
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);
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assert_eq!(parse("*"), Ok(SelectorList::from_vec(vec!(
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Selector::from_vec(vec!(
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Component::ExplicitUniversalType,
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@ -1804,12 +1866,22 @@ pub mod tests {
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Component::ExplicitUniversalType,
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), specificity(0, 0, 0))
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))));
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assert_eq!(parse("*|*"), Ok(SelectorList::from_vec(vec!(
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assert_eq!(parse_expected("*|*", Some("*")), Ok(SelectorList::from_vec(vec!(
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Selector::from_vec(vec!(
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Component::ExplicitAnyNamespace,
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Component::ExplicitUniversalType,
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), specificity(0, 0, 0))
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))));
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assert_eq!(
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parse_ns(
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"*|*",
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&DummyParser::default_with_namespace(DummyAtom::from("https://mozilla.org"))
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),
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Ok(SelectorList::from_vec(vec!(
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Selector::from_vec(vec!(
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Component::ExplicitAnyNamespace,
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Component::ExplicitUniversalType,
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), specificity(0, 0, 0)))))
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);
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assert_eq!(parse(".foo:lang(en-US)"), Ok(SelectorList::from_vec(vec!(
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Selector::from_vec(vec!(
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Component::Class(DummyAtom::from("foo")),
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@ -2029,10 +2101,11 @@ pub mod tests {
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].into_boxed_slice()
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)), specificity(0, 0, 0))
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))));
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assert_eq!(parse_ns(":not(*|*)", &parser), Ok(SelectorList::from_vec(vec!(
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// *| should be elided if there is no default namespace.
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// https://github.com/servo/servo/pull/17537
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assert_eq!(parse_ns_expected(":not(*|*)", &parser, Some(":not(*)")), Ok(SelectorList::from_vec(vec!(
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Selector::from_vec(vec!(Component::Negation(
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vec![
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Component::ExplicitAnyNamespace,
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Component::ExplicitUniversalType,
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].into_boxed_slice()
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)), specificity(0, 0, 0))
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@ -2063,7 +2136,10 @@ pub mod tests {
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#[test]
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fn test_universal() {
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let selector = &parse("*|*::before").unwrap().0[0];
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let selector = &parse_ns(
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"*|*::before",
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&DummyParser::default_with_namespace(DummyAtom::from("https://mozilla.org"))
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).unwrap().0[0];
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assert!(selector.is_universal());
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}
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@ -1,26 +1,5 @@
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[serialize-namespaced-type-selectors.htm]
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type: testharness
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[Type selector with any namespace]
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expected: FAIL
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[Universal selector in any namespace]
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expected: FAIL
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[Type selector with any namespace followed by class]
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expected: FAIL
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[Type selector with any namespace followed by id]
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expected: FAIL
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[Type selector with any namespace followed by pseudo class]
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expected: FAIL
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[Type selector with any namespace followed by pseudo element]
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expected: FAIL
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[Type selector with any namespace followed by attribute selector]
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expected: FAIL
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[Universal selector followed by class]
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expected: FAIL
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@ -51,27 +30,6 @@
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[Universal selector in any namespace followed by attribute selector]
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expected: FAIL
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[Type selector with namespace equal to default namespace]
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expected: FAIL
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[Universal selector with namespace equal to default namespace]
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expected: FAIL
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[Type selector with namespace equal to default namespace followed by class]
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expected: FAIL
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[Type selector with namespace equal to default namespace followed by id]
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expected: FAIL
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[Type selector with namespace equal to default namespace followed by pseudo class]
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expected: FAIL
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[Type selector with namespace equal to default namespace followed by pseudo element]
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expected: FAIL
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[Type selector with namespace equal to default namespace followed by attribute selector]
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expected: FAIL
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[Universal selector with namespace equal to default namespace followed by class]
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expected: FAIL
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@ -1,26 +1,5 @@
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[serialize-namespaced-type-selectors.html]
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type: testharness
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[Type selector with any namespace]
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expected: FAIL
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[Universal selector in any namespace]
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expected: FAIL
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[Type selector with any namespace followed by class]
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expected: FAIL
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[Type selector with any namespace followed by id]
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expected: FAIL
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[Type selector with any namespace followed by pseudo class]
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expected: FAIL
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[Type selector with any namespace followed by pseudo element]
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expected: FAIL
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[Type selector with any namespace followed by attribute selector]
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expected: FAIL
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[Universal selector followed by class]
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expected: FAIL
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@ -51,27 +30,6 @@
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[Universal selector in any namespace followed by attribute selector]
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expected: FAIL
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[Type selector with namespace equal to default namespace]
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expected: FAIL
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[Universal selector with namespace equal to default namespace]
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expected: FAIL
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[Type selector with namespace equal to default namespace followed by class]
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expected: FAIL
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[Type selector with namespace equal to default namespace followed by id]
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expected: FAIL
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[Type selector with namespace equal to default namespace followed by pseudo class]
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expected: FAIL
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[Type selector with namespace equal to default namespace followed by pseudo element]
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expected: FAIL
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[Type selector with namespace equal to default namespace followed by attribute selector]
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expected: FAIL
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[Universal selector with namespace equal to default namespace followed by class]
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expected: FAIL
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