diff options
| -rw-r--r-- | components/selectors/matching.rs | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/components/selectors/matching.rs b/components/selectors/matching.rs index fad3ce181ae..afff6cd1e92 100644 --- a/components/selectors/matching.rs +++ b/components/selectors/matching.rs @@ -787,6 +787,27 @@ fn matches_generic_nth_child<E, F>(element: &E, HAS_SLOW_SELECTOR_LATER_SIBLINGS }); + let index = nth_child_index(element, is_of_type, is_from_end); + + // Is there a non-negative integer n such that An+B=index? + match index.checked_sub(b) { + None => false, + Some(an) => match an.checked_div(a) { + Some(n) => n >= 0 && a * n == an, + None /* a == 0 */ => an == 0, + }, + } +} + +#[inline] +fn nth_child_index<E>( + element: &E, + is_of_type: bool, + is_from_end: bool, +) -> i32 +where + E: Element, +{ let mut index: i32 = 1; let mut next_sibling = if is_from_end { element.next_sibling_element() @@ -815,14 +836,7 @@ fn matches_generic_nth_child<E, F>(element: &E, }; } - // Is there a non-negative integer n such that An+B=index? - match index.checked_sub(b) { - None => false, - Some(an) => match an.checked_div(a) { - Some(n) => n >= 0 && a * n == an, - None /* a == 0 */ => an == 0, - }, - } + index } #[inline] |