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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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17
components/shared/layout/lib.rs
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@ -306,9 +306,11 @@ pub trait Layout {
fn query_client_rect(&self, node: TrustedNodeAddress) -> Rect<i32>;
fn query_element_inner_outer_text(&self, node: TrustedNodeAddress) -> String;
fn query_offset_parent(&self, node: TrustedNodeAddress) -> OffsetParentResponse;
/// Query the scroll container for the given node. If node is `None`, the scroll container for
/// the viewport is returned.
fn query_scroll_container(
&self,
node: TrustedNodeAddress,
node: Option<TrustedNodeAddress>,
flags: ScrollContainerQueryFlags,
) -> Option<ScrollContainerResponse>;
fn query_resolved_style(
@ -377,7 +379,7 @@ bitflags! {
}
}
#[derive(Clone, Copy, Debug)]
#[derive(Clone, Copy, Debug, MallocSizeOf)]
pub struct AxesOverflow {
pub x: Overflow,
pub y: Overflow,
@ -401,9 +403,18 @@ impl From<&ComputedValues> for AxesOverflow {
}
}
impl AxesOverflow {
pub fn to_scrollable(&self) -> Self {
Self {
x: self.x.to_scrollable(),
y: self.y.to_scrollable(),
}
}
}
#[derive(Clone)]
pub enum ScrollContainerResponse {
Viewport,
Viewport(AxesOverflow),
Element(UntrustedNodeAddress, AxesOverflow),
}