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LibWeb: Dispatch "wheel" event

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This commit is contained in:
Aliaksandr Kalenik 2022-10-17 20:54:01 +03:00 • committed by Linus Groh
parent 97dc1585b1
commit 501fb1cccb
8 changed files with 176 additions and 12 deletions
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52
Userland/Libraries/LibWeb/Page/EventHandler.cpp
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@ -19,6 +19,7 @@
#include <LibWeb/UIEvents/EventNames.h>
#include <LibWeb/UIEvents/KeyboardEvent.h>
#include <LibWeb/UIEvents/MouseEvent.h>
#include <LibWeb/UIEvents/WheelEvent.h>
namespace Web {
@ -133,18 +134,51 @@ bool EventHandler::handle_mousewheel(Gfx::IntPoint const& position, unsigned int
if (modifiers & KeyModifier::Mod_Shift)
swap(wheel_delta_x, wheel_delta_y);
// FIXME: Support wheel events in nested browsing contexts.
bool handled_event = false;
auto result = paint_root()->hit_test(position.to_type<float>(), Painting::HitTestType::Exact);
if (result.has_value() && result->paintable->handle_mousewheel({}, position, buttons, modifiers, wheel_delta_x, wheel_delta_y))
return true;
if (auto* page = m_browsing_context.page()) {
page->client().page_did_request_scroll(wheel_delta_x * 20, wheel_delta_y * 20);
return true;
RefPtr<Painting::Paintable> paintable;
if (m_mouse_event_tracking_layout_node) {
paintable = m_mouse_event_tracking_layout_node->paintable();
} else {
if (auto result = paint_root()->hit_test(position.to_type<float>(), Painting::HitTestType::Exact); result.has_value())
paintable = result->paintable;
}
return false;
if (paintable) {
paintable->handle_mousewheel({}, position, buttons, modifiers, wheel_delta_x, wheel_delta_y);
JS::GCPtr<DOM::Node> node = paintable->mouse_event_target();
if (!node)
node = paintable->dom_node();
if (node) {
// FIXME: Support wheel events in nested browsing contexts.
if (is<HTML::HTMLIFrameElement>(*node)) {
return false;
}
// Search for the first parent of the hit target that's an element.
auto* layout_node = &paintable->layout_node();
while (layout_node && node && !node->is_element() && layout_node->parent()) {
layout_node = layout_node->parent();
node = layout_node->dom_node();
}
if (!node || !layout_node) {
return false;
}
auto offset = compute_mouse_event_offset(position, *layout_node);
if (node->dispatch_event(*UIEvents::WheelEvent::create_from_platform_event(node->realm(), UIEvents::EventNames::wheel, offset.x(), offset.y(), position.x(), position.y(), wheel_delta_x, wheel_delta_y))) {
if (auto* page = m_browsing_context.page()) {
page->client().page_did_request_scroll(wheel_delta_x * 20, wheel_delta_y * 20);
}
}
handled_event = true;
}
}
return handled_event;
}
bool EventHandler::handle_mouseup(Gfx::IntPoint const& position, unsigned button, unsigned modifiers)