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Touch handler: Fix race condition and rate-limit move events (#35537)

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* TouchSequenceInfo is added to store information about a touch sequence.
  For details about TouchSequenceInfo, see the code comments.
The handling_touch_move attribute is added to the TouchHandler, indicating that the script is processing the touch move event.
  When handling_touch_move is set to true, the touch move event does not need to be sent to the script thread.

Signed-off-by: kongbai1996 <1782765876@qq.com>

* move touch state, active_touch_point and handling_touch_move to TouchSequenceInfo form TouchHandler.
remove TouchSequenceInfo end_sequence property, add Finished state mark sequence end.
if preventDefault on touchup, do not prevent Fling.

Signed-off-by: kongbai1996 <1782765876@qq.com>

* Refactor Touchhandler

- Add a newtype wrapper for the TouchSequenceId
- Move more state back into the TouchSequenceState
- Rename TouchAction to TouchMoveAction,
  since it only covers immediate actions now.
  Everything else is handled via state, since
  it needs to wait on the handler.

Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>

* Fix test-tidy

Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>

* Fix clippy missing-default lint

Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>

* Fix remaining clippy lints

Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>

* Remove accidental committed test file

Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>

* Remove wrong todo comment

(move events that are sent to script are just raw  touchpoints,
 no merging needed)

Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>

* Fix preventdefault after long touch_down handler

Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>

---------

Signed-off-by: kongbai1996 <1782765876@qq.com>
Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>
Co-authored-by: Jonathan Schwender <schwenderjonathan@gmail.com>
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Bi Fuguo 2025-02-25 15:13:16 +08:00 • committed by GitHub
parent 374bfc6983
commit f3a8bf8ca2
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9 changed files with 746 additions and 278 deletions
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43
components/script/script_thread.rs
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@ -80,11 +80,10 @@ use script_layout_interface::{
node_id_from_scroll_id, LayoutConfig, LayoutFactory, ReflowGoal, ScriptThreadFactory,
};
use script_traits::{
ConstellationInputEvent, DiscardBrowsingContext, DocumentActivity, EventResult,
InitialScriptState, JsEvalResult, LoadData, LoadOrigin, NavigationHistoryBehavior,
NewLayoutInfo, Painter, ProgressiveWebMetricType, ScriptMsg, ScriptThreadMessage,
ScriptToConstellationChan, ScrollState, StructuredSerializedData, UpdatePipelineIdReason,
WindowSizeData, WindowSizeType,
ConstellationInputEvent, DiscardBrowsingContext, DocumentActivity, InitialScriptState,
JsEvalResult, LoadData, LoadOrigin, NavigationHistoryBehavior, NewLayoutInfo, Painter,
ProgressiveWebMetricType, ScriptMsg, ScriptThreadMessage, ScriptToConstellationChan,
ScrollState, StructuredSerializedData, UpdatePipelineIdReason, WindowSizeData, WindowSizeType,
};
use servo_atoms::Atom;
use servo_config::opts;
@ -1096,22 +1095,24 @@ impl ScriptThread {
InputEvent::Touch(touch_event) => {
let touch_result =
document.handle_touch_event(touch_event, event.hit_test_result, can_gc);
match touch_result {
TouchEventResult::Processed(handled) => {
let result = if handled {
EventResult::DefaultAllowed(touch_event.action)
} else {
EventResult::DefaultPrevented(touch_event.event_type)
};
let message = ScriptMsg::TouchEventProcessed(result);
self.senders
.pipeline_to_constellation_sender
.send((pipeline_id, message))
.unwrap();
},
_ => {
// TODO: Calling preventDefault on a touchup event should prevent clicks.
},
if let TouchEventResult::Processed(handled) = touch_result {
let sequence_id = touch_event.expect_sequence_id();
let result = if handled {
script_traits::TouchEventResult::DefaultAllowed(
sequence_id,
touch_event.event_type,
)
} else {
script_traits::TouchEventResult::DefaultPrevented(
sequence_id,
touch_event.event_type,
)
};
let message = ScriptMsg::TouchEventProcessed(result);
self.senders
.pipeline_to_constellation_sender
.send((pipeline_id, message))
.unwrap();
}
},
InputEvent::Wheel(wheel_event) => {