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LibWeb: Implement pinch-to-zoom support

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Adds pinch event handling that adjusts the VisualViewport scale and
offset. VisualViewport's (offset, scale) is then used to construct a
transformation matrix which is applied before display list execution.
This commit is contained in:
Aliaksandr Kalenik 2025-10-09 17:30:12 +02:00 • committed by Alexander Kalenik
commit 9862d8b4a6
Notes: github-actions[bot] 2025-10-10 13:39:26 +00:00
14 changed files with 149 additions and 40 deletions
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4
Libraries/LibWeb/HTML/EventLoop/EventLoop.cpp
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@ -291,8 +291,8 @@ void EventLoop::process_input_events() const
[&](Web::DragEvent& drag_event) {
return page.handle_drag_and_drop_event(drag_event.type, drag_event.position, drag_event.screen_position, drag_event.button, drag_event.buttons, drag_event.modifiers, move(drag_event.files));
},
[&](Web::PinchEvent&) {
return EventResult::Dropped;
[&](Web::PinchEvent& pinch_event) {
return page.handle_pinch_event(pinch_event.position, pinch_event.scale_delta);
});
for (size_t i = 0; i < event.coalesced_event_count; ++i)