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Report invalid selectors (bug 1384216).

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This commit is contained in:
Josh Matthews 2017-08-28 17:21:07 -07:00
parent 408c34a76d
commit 9a7cceb0a1
3 changed files with 51 additions and 14 deletions
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6
components/selectors/builder.rs
View file

@ -90,6 +90,12 @@ impl<Impl: SelectorImpl> SelectorBuilder<Impl> {
self.simple_selectors.is_empty()
}
/// Returns true if combinators have ever been pushed to this builder.
#[inline(always)]
pub fn has_combinators(&self) -> bool {
!self.combinators.is_empty()
}
/// Consumes the builder, producing a Selector.
#[inline(always)]
pub fn build(&mut self, parsed_pseudo: bool) -> ThinArc<SpecificityAndFlags, Component<Impl>> {

35
components/selectors/parser.rs
View file

@ -54,16 +54,19 @@ pub enum SelectorParseError<'i, T> {
NegationSelectorComponentNotNamespace,
NegationSelectorComponentNotLocalName,
EmptySelector,
DanglingCombinator,
NonSimpleSelectorInNegation,
UnexpectedTokenInAttributeSelector(Token<'i>),
PseudoElementExpectedColon,
PseudoElementExpectedIdent,
PseudoElementExpectedColon(Token<'i>),
PseudoElementExpectedIdent(Token<'i>),
NoIdentForPseudo(Token<'i>),
UnsupportedPseudoClassOrElement(CowRcStr<'i>),
UnexpectedIdent(CowRcStr<'i>),
ExpectedNamespace(CowRcStr<'i>),
ExpectedBarInAttr(Token<'i>),
BadValueInAttr(Token<'i>),
InvalidQualNameInAttr(Token<'i>),
ExplicitNamespaceUnexpectedToken(Token<'i>),
Custom(T),
}
@ -1044,7 +1047,12 @@ fn parse_selector<'i, 't, P, E, Impl>(
let mut parsed_pseudo_element;
'outer_loop: loop {
// Parse a sequence of simple selectors.
parsed_pseudo_element = parse_compound_selector(parser, input, &mut builder)?;
parsed_pseudo_element = match parse_compound_selector(parser, input, &mut builder) {
Ok(result) => result,
Err(ParseError::Custom(SelectorParseError::EmptySelector)) if builder.has_combinators() =>
return Err(SelectorParseError::DanglingCombinator.into()),
Err(e) => return Err(e),
};
if parsed_pseudo_element {
break;
}
@ -1109,9 +1117,10 @@ fn parse_type_selector<'i, 't, P, E, Impl, S>(parser: &P, input: &mut CssParser<
Impl: SelectorImpl,
S: Push<Component<Impl>>,
{
match parse_qualified_name(parser, input, /* in_attr_selector = */ false)? {
OptionalQName::None(_) => Ok(false),
OptionalQName::Some(namespace, local_name) => {
match parse_qualified_name(parser, input, /* in_attr_selector = */ false) {
Err(ParseError::Basic(BasicParseError::EndOfInput)) |
Ok(OptionalQName::None(_)) => Ok(false),
Ok(OptionalQName::Some(namespace, local_name)) => {
match namespace {
QNamePrefix::ImplicitAnyNamespace => {}
QNamePrefix::ImplicitDefaultNamespace(url) => {
@ -1160,6 +1169,7 @@ fn parse_type_selector<'i, 't, P, E, Impl, S>(parser: &P, input: &mut CssParser<
}
Ok(true)
}
Err(e) => Err(e)
}
}
@ -1212,7 +1222,7 @@ fn parse_qualified_name<'i, 't, P, E, Impl>
Ok(OptionalQName::Some(namespace, Some(local_name.clone())))
},
Ok(t) if in_attr_selector => Err(SelectorParseError::InvalidQualNameInAttr(t.clone()).into()),
Ok(t) => Err(ParseError::Basic(BasicParseError::UnexpectedToken(t.clone()))),
Ok(t) => Err(SelectorParseError::ExplicitNamespaceUnexpectedToken(t.clone()).into()),
Err(e) => Err(ParseError::Basic(e)),
}
};
@ -1499,14 +1509,15 @@ fn parse_compound_selector<'i, 't, P, E, Impl>(
match input.next_including_whitespace() {
Ok(&Token::Colon) => {},
Ok(&Token::WhiteSpace(_)) | Err(_) => break,
_ => return Err(SelectorParseError::PseudoElementExpectedColon.into()),
Ok(t) =>
return Err(SelectorParseError::PseudoElementExpectedColon(t.clone()).into()),
}
// TODO(emilio): Functional pseudo-classes too?
// We don't need it for now.
let name = match input.next_including_whitespace() {
Ok(&Token::Ident(ref name)) => name.clone(),
_ => return Err(SelectorParseError::PseudoElementExpectedIdent.into()),
let name = match input.next_including_whitespace()? {
&Token::Ident(ref name) => name.clone(),
t => return Err(SelectorParseError::NoIdentForPseudo(t.clone()).into()),
};
let pseudo_class =
@ -1626,7 +1637,7 @@ fn parse_one_simple_selector<'i, 't, P, E, Impl>(parser: &P,
let (name, is_functional) = match next_token {
Token::Ident(name) => (name, false),
Token::Function(name) => (name, true),
t => return Err(ParseError::Basic(BasicParseError::UnexpectedToken(t))),
t => return Err(SelectorParseError::PseudoElementExpectedIdent(t).into()),
};
let is_pseudo_element = !is_single_colon ||
P::is_pseudo_element_allows_single_colon(&name);