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script: Expose a constructor on HTMLCollection that takes a static function (#34667)

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Expose a new constructor on `HTMLCollection`, `new_with_filter_fn`, that
filters elements using a simple static function -- a common pattern.
This allows more easily creating this `HTMLCollection` without having to
create a new data structure. Since the constructor takes a static
function, no data should be captured preventing garbage collection
issues.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Martin Robinson 2024-12-18 09:03:50 +01:00 • committed by GitHub
parent d54b68bc96
commit 9d986a8ab3
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GPG key ID: B5690EEEBB952194
7 changed files with 90 additions and 135 deletions
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22
components/script/dom/htmltablerowelement.rs
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@ -18,7 +18,7 @@ use crate::dom::bindings::root::{DomRoot, LayoutDom, MutNullableDom};
use crate::dom::bindings::str::DOMString;
use crate::dom::document::Document;
use crate::dom::element::{Element, LayoutElementHelpers};
use crate::dom::htmlcollection::{CollectionFilter, HTMLCollection};
use crate::dom::htmlcollection::HTMLCollection;
use crate::dom::htmlelement::HTMLElement;
use crate::dom::htmltablecellelement::HTMLTableCellElement;
use crate::dom::htmltableelement::HTMLTableElement;
@ -27,15 +27,6 @@ use crate::dom::node::{window_from_node, Node};
use crate::dom::virtualmethods::VirtualMethods;
use crate::script_runtime::CanGc;
#[derive(JSTraceable)]
struct CellsFilter;
impl CollectionFilter for CellsFilter {
fn filter(&self, elem: &Element, root: &Node) -> bool {
(elem.is::<HTMLTableCellElement>()) &&
elem.upcast::<Node>().GetParentNode().as_deref() == Some(root)
}
}
#[dom_struct]
pub struct HTMLTableRowElement {
htmlelement: HTMLElement,
@ -95,9 +86,14 @@ impl HTMLTableRowElementMethods<crate::DomTypeHolder> for HTMLTableRowElement {
// https://html.spec.whatwg.org/multipage/#dom-tr-cells
fn Cells(&self) -> DomRoot<HTMLCollection> {
self.cells.or_init(|| {
let window = window_from_node(self);
let filter = Box::new(CellsFilter);
HTMLCollection::create(&window, self.upcast(), filter)
HTMLCollection::new_with_filter_fn(
&window_from_node(self),
self.upcast(),
|element, root| {
(element.is::<HTMLTableCellElement>()) &&
element.upcast::<Node>().GetParentNode().as_deref() == Some(root)
},
)
})
}