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LibWeb: Implement the MouseEvent.relatedTarget attribute

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This returns the secondary target of a mouse event. For `onmouseenter`
and `onmouseover` events, this is the EventTarget the mouse exited
from. For `onmouseleave` and `onmouseout` events, this is the
EventTarget the mouse entered to.
This commit is contained in:
Tim Ledbetter 2024-05-20 06:02:22 +01:00 • committed by Andreas Kling
commit a6d6729034
Notes: sideshowbarker 2024-07-17 18:49:10 +09:00
6 changed files with 46 additions and 21 deletions
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16
Userland/Libraries/LibWeb/DOM/Document.cpp
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@ -1337,7 +1337,9 @@ void Document::set_hovered_node(Node* node)
// https://w3c.github.io/uievents/#mouseout
if (old_hovered_node && old_hovered_node != m_hovered_node) {
auto event = UIEvents::MouseEvent::create(realm(), UIEvents::EventNames::mouseout);
UIEvents::MouseEventInit mouse_event_init {};
mouse_event_init.related_target = m_hovered_node;
auto event = UIEvents::MouseEvent::create(realm(), UIEvents::EventNames::mouseout, mouse_event_init);
old_hovered_node->dispatch_event(event);
}
@ -1346,13 +1348,17 @@ void Document::set_hovered_node(Node* node)
// FIXME: Check if we need to dispatch these events in a specific order.
for (auto target = old_hovered_node; target && target.ptr() != common_ancestor; target = target->parent()) {
// FIXME: Populate the event with mouse coordinates, etc.
target->dispatch_event(UIEvents::MouseEvent::create(realm(), UIEvents::EventNames::mouseleave));
UIEvents::MouseEventInit mouse_event_init {};
mouse_event_init.related_target = m_hovered_node;
target->dispatch_event(UIEvents::MouseEvent::create(realm(), UIEvents::EventNames::mouseleave, mouse_event_init));
}
}
// https://w3c.github.io/uievents/#mouseover
if (m_hovered_node && m_hovered_node != old_hovered_node) {
auto event = UIEvents::MouseEvent::create(realm(), UIEvents::EventNames::mouseover);
UIEvents::MouseEventInit mouse_event_init {};
mouse_event_init.related_target = old_hovered_node;
auto event = UIEvents::MouseEvent::create(realm(), UIEvents::EventNames::mouseover, mouse_event_init);
m_hovered_node->dispatch_event(event);
}
@ -1361,7 +1367,9 @@ void Document::set_hovered_node(Node* node)
// FIXME: Check if we need to dispatch these events in a specific order.
for (auto target = m_hovered_node; target && target.ptr() != common_ancestor; target = target->parent()) {
// FIXME: Populate the event with mouse coordinates, etc.
target->dispatch_event(UIEvents::MouseEvent::create(realm(), UIEvents::EventNames::mouseenter));
UIEvents::MouseEventInit mouse_event_init {};
mouse_event_init.related_target = old_hovered_node;
target->dispatch_event(UIEvents::MouseEvent::create(realm(), UIEvents::EventNames::mouseenter, mouse_event_init));
}
}
}