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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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6
components/shared/script/lib.rs
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@ -21,8 +21,8 @@ use bluetooth_traits::BluetoothRequest;
use canvas_traits::webgl::WebGLPipeline;
use compositing_traits::CrossProcessCompositorApi;
use constellation_traits::{
LoadData, NavigationHistoryBehavior, ScriptToConstellationChan, StructuredSerializedData,
WindowSizeType,
KeyboardScroll, LoadData, NavigationHistoryBehavior, ScriptToConstellationChan,
StructuredSerializedData, WindowSizeType,
};
use crossbeam_channel::{RecvTimeoutError, Sender};
use devtools_traits::ScriptToDevtoolsControlMsg;
@ -265,6 +265,8 @@ pub enum ScriptThreadMessage {
/// asynchronous image uploads for the given `Pipeline`. These are mainly used
/// by canvas to perform uploads while the display list is being built.
NoLongerWaitingOnAsychronousImageUpdates(PipelineId),
/// Forward a keyboard scroll operation from an `<iframe>` to a parent pipeline.
ForwardKeyboardScroll(PipelineId, KeyboardScroll),
}
impl fmt::Debug for ScriptThreadMessage {