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Code Issues Projects Releases Packages Wiki Activity Actions 9

LibWeb: Schedule input event processing on HTML event loop

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Our existing coalescing mechanism for input events didn't prevent
multiple mousemove/mousewheel events from being processed between paint
cycles. Since handling these events can trigger style & layout updates
solely for hit-testing purposes, we might end up doing work that won't
be observable by a user and could be avoided by shceduling input events
processing to happen right before painting the next frame.
This commit is contained in:
Aliaksandr Kalenik 2025-02-14 23:25:12 +01:00 • committed by Andreas Kling
commit d3c481f71a
Notes: github-actions[bot] 2025-02-15 20:10:12 +00:00
10 changed files with 90 additions and 70 deletions
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17
Services/WebContent/ConnectionFromClient.h
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@ -47,6 +47,8 @@ public:
Function<void(IPC::File const&)> on_image_decoder_connection;
Queue<Web::QueuedInputEvent>& input_event_queue() { return m_input_event_queue; }
private:
explicit ConnectionFromClient(GC::Heap&, IPC::Transport);
@ -149,26 +151,15 @@ private:
virtual void system_time_zone_changed() override;
void report_finished_handling_input_event(u64 page_id, Web::EventResult event_was_handled);
GC::Heap& m_heap;
NonnullOwnPtr<PageHost> m_page_host;
HashMap<int, Web::FileRequest> m_requested_files {};
int last_id { 0 };
struct QueuedInputEvent {
u64 page_id { 0 };
Web::InputEvent event;
size_t coalesced_event_count { 0 };
};
void enqueue_input_event(Web::QueuedInputEvent);
void enqueue_input_event(QueuedInputEvent);
void process_next_input_event();
Queue<QueuedInputEvent> m_input_event_queue;
GC::Root<Web::Platform::Timer> m_input_event_queue_timer;
Queue<Web::QueuedInputEvent> m_input_event_queue;
};
}