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Correctly paint the CSS canvas’ background

Browse source 
https://drafts.csswg.org/css-backgrounds/#special-backgrounds

Fixes https://github.com/servo/servo/issues/25559
Closes https://github.com/servo/servo/pull/26121, as it is an alternative.
This commit is contained in:
Simon Sapin 2020-05-04 15:50:57 +02:00
parent c7acfc37ed
commit 1f6efbf9e9
9 changed files with 312 additions and 37 deletions
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17
components/layout_2020/dom_traversal.rs
View file

@ -87,14 +87,12 @@ fn traverse_children_of<'dom, Node>(
{
traverse_pseudo_element(WhichPseudoElement::Before, parent_element, context, handler);
let mut next = parent_element.first_child();
while let Some(child) = next {
for child in iter_child_nodes(parent_element) {
if let Some(contents) = child.as_text() {
handler.handle_text(child, contents, &child.style(context));
} else if child.is_element() {
traverse_element(child, context, handler);
}
next = child.next_sibling();
}
traverse_pseudo_element(WhichPseudoElement::After, parent_element, context, handler);
@ -485,3 +483,16 @@ where
// for DOM descendants of elements with `display: none`.
}
}
pub(crate) fn iter_child_nodes<'dom, Node>(parent: Node) -> impl Iterator<Item = Node>
where
Node: NodeExt<'dom>,
{
let mut next = parent.first_child();
std::iter::from_fn(move || {
next.map(|child| {
next = child.next_sibling();
child
})
})
}