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Bug 1367615 - Stylo: implement inIDOMUtils.getSelectorCount and inIDOMUtils.getSelectorTextFromIndex

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This commit is contained in:
Fernando Jiménez Moreno 2017-06-07 17:41:24 +02:00
parent 7e273d6c9b
commit 36f3255484
3 changed files with 47 additions and 9 deletions
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27
components/selectors/parser.rs
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@ -167,6 +167,23 @@ impl<Impl: SelectorImpl> SelectorList<Impl> {
pub fn from_vec(v: Vec<Selector<Impl>>) -> Self {
SelectorList(v.into_iter().map(SelectorAndHashes::new).collect())
}
pub fn to_css_from_index<W>(&self, from_index: usize, dest: &mut W)
-> fmt::Result where W: fmt::Write {
let mut iter = self.0.iter().skip(from_index);
let first = match iter.next() {
Some(f) => f,
None => return Ok(()),
};
first.selector.to_css(dest)?;
for selector_and_hashes in iter {
dest.write_str(", ")?;
selector_and_hashes.selector.to_css(dest)?;
}
Ok(())
}
}
/// Copied from Gecko, who copied it from WebKit. Note that increasing the
@ -638,15 +655,7 @@ impl<Impl: SelectorImpl> Debug for LocalName<Impl> {
impl<Impl: SelectorImpl> ToCss for SelectorList<Impl> {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
let mut iter = self.0.iter();
let first = iter.next()
.expect("Empty SelectorList, should contain at least one selector");
first.selector.to_css(dest)?;
for selector_and_hashes in iter {
dest.write_str(", ")?;
selector_and_hashes.selector.to_css(dest)?;
}
Ok(())
self.to_css_from_index(/* from_index = */ 0, dest)
}
}