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script: Chain up keyboard scrolling to parent <iframe>s (#39469)

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When an `<iframe>` cannot scroll because the size of the frame is
greater than or
equal to the size of page contents, chain up the keyboard scroll
operation to the parent frame.

Testing: A new Servo-only WPT tests is added, though needs to be
manually
run with `--product servodriver`.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
Co-authored-by: Delan Azabani <dazabani@igalia.com>
This commit is contained in:
Martin Robinson 2025-09-25 13:16:41 +02:00 • committed by GitHub
parent 75e32ba5a4
commit ffdb7d3663
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23 changed files with 406 additions and 132 deletions
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7
components/script/dom/windowproxy.rs
View file

@ -107,7 +107,9 @@ pub(crate) struct WindowProxy {
/// <https://html.spec.whatwg.org/multipage/#is-closing>
is_closing: Cell<bool>,
/// The containing iframe element, if this is a same-origin iframe
/// If the containing `<iframe>` of this [`WindowProxy`] is from a same-origin page,
/// this will be the [`Element`] of the `<iframe>` element in the realm of the
/// parent page. Otherwise, it is `None`.
frame_element: Option<Dom<Element>>,
/// The parent browsing context's window proxy, if this is a nested browsing context
@ -630,6 +632,9 @@ impl WindowProxy {
self.webview_id
}
/// If the containing `<iframe>` of this [`WindowProxy`] is from a same-origin page,
/// this will return an [`Element`] of the `<iframe>` element in the realm of the parent
/// page.
pub(crate) fn frame_element(&self) -> Option<&Element> {
self.frame_element.as_deref()
}