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script: Use HTMLElement.scrollParent to implement Element.scrollIntoView (#39144)

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To find scrolling ancestors, we need to walk up the flat tree and only
consider the elements that are in the chain of containing block
ancestors of an element. `scrollParent` now does this so we can use it
to properly implement `scrollIntoView`.

Testing: There are WPT tests for this change.

---------

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
Co-authored-by: Oriol Brufau <obrufau@igalia.com>
This commit is contained in:
Martin Robinson 2025-09-07 14:44:11 -07:00 • committed by GitHub
parent 286bbe6cb1
commit 9f4f598f44
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9 changed files with 141 additions and 71 deletions
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22
components/script/dom/window.rs
View file

@ -56,8 +56,8 @@ use js::rust::{
use layout_api::{
BoxAreaType, ElementsFromPointFlags, ElementsFromPointResult, FragmentType, Layout,
PendingImage, PendingImageState, PendingRasterizationImage, QueryMsg, ReflowGoal,
ReflowPhasesRun, ReflowRequest, ReflowRequestRestyle, RestyleReason, ScrollParentResponse,
TrustedNodeAddress, combine_id_with_fragment_type,
ReflowPhasesRun, ReflowRequest, ReflowRequestRestyle, RestyleReason, ScrollContainerQueryType,
ScrollContainerResponse, TrustedNodeAddress, combine_id_with_fragment_type,
};
use malloc_size_of::MallocSizeOf;
use media::WindowGLContext;
@ -2599,21 +2599,15 @@ impl Window {
(element, response.rect)
}
#[allow(unsafe_code)]
pub(crate) fn scroll_parent_query(&self, node: &Node) -> Option<DomRoot<Element>> {
pub(crate) fn scroll_container_query(
&self,
node: &Node,
query_type: ScrollContainerQueryType,
) -> Option<ScrollContainerResponse> {
self.layout_reflow(QueryMsg::ScrollParentQuery);
self.layout
.borrow()
.query_scroll_parent(node.to_trusted_node_address())
.and_then(|response| match response {
ScrollParentResponse::DocumentScrollingElement => {
self.Document().GetScrollingElement()
},
ScrollParentResponse::Element(parent_node_address) => {
let node = unsafe { from_untrusted_node_address(parent_node_address) };
DomRoot::downcast(node)
},
})
.query_scroll_container(node.to_trusted_node_address(), query_type)
}
pub(crate) fn text_index_query(