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LibWeb: Implement basic "scroll" events at the document level

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This commit is contained in:
Andreas Kling 2022-09-17 17:40:26 +02:00
parent 07c4bf03b5
commit da451467b1
6 changed files with 65 additions and 1 deletions
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28
Userland/Libraries/LibWeb/DOM/Document.cpp
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@ -323,6 +323,11 @@ void Document::visit_edges(Cell::Visitor& visitor)
for (auto& node_iterator : m_node_iterators)
visitor.visit(node_iterator);
for (auto& target : m_pending_scroll_event_targets)
visitor.visit(target.ptr());
for (auto& target : m_pending_scrollend_event_targets)
visitor.visit(target.ptr());
}
// https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#dom-document-write
@ -1570,6 +1575,29 @@ void Document::run_the_resize_steps()
update_layout();
}
// https://w3c.github.io/csswg-drafts/cssom-view-1/#document-run-the-scroll-steps
void Document::run_the_scroll_steps()
{
// 1. For each item target in doc’s pending scroll event targets, in the order they were added to the list, run these substeps:
for (auto& target : m_pending_scroll_event_targets) {
// 1. If target is a Document, fire an event named scroll that bubbles at target and fire an event named scroll at the VisualViewport that is associated with target.
if (is<Document>(*target)) {
auto event = DOM::Event::create(window(), HTML::EventNames::scroll);
event->set_bubbles(true);
target->dispatch_event(*event);
// FIXME: Fire at the associated VisualViewport
}
// 2. Otherwise, fire an event named scroll at target.
else {
auto event = DOM::Event::create(window(), HTML::EventNames::scroll);
target->dispatch_event(*event);
}
}
// 2. Empty doc’s pending scroll event targets.
m_pending_scroll_event_targets.clear();
}
void Document::add_media_query_list(JS::NonnullGCPtr<CSS::MediaQueryList> media_query_list)
{
m_media_query_lists.append(*media_query_list);

10
Userland/Libraries/LibWeb/DOM/Document.h
View file

@ -317,6 +317,7 @@ public:
String visibility_state() const;
void run_the_resize_steps();
void run_the_scroll_steps();
void evaluate_media_queries_and_report_changes();
void add_media_query_list(JS::NonnullGCPtr<CSS::MediaQueryList>);
@ -360,6 +361,9 @@ public:
String domain() const;
void set_domain(String const& domain);
auto& pending_scroll_event_targets() { return m_pending_scroll_event_targets; }
auto& pending_scrollend_event_targets() { return m_pending_scrollend_event_targets; }
protected:
virtual void visit_edges(Cell::Visitor&) override;
@ -456,6 +460,12 @@ private:
// Used by run_the_resize_steps().
Gfx::IntSize m_last_viewport_size;
// https://w3c.github.io/csswg-drafts/cssom-view-1/#document-pending-scroll-event-targets
Vector<JS::NonnullGCPtr<EventTarget>> m_pending_scroll_event_targets;
// https://w3c.github.io/csswg-drafts/cssom-view-1/#document-pending-scrollend-event-targets
Vector<JS::NonnullGCPtr<EventTarget>> m_pending_scrollend_event_targets;
// Used by evaluate_media_queries_and_report_changes().
Vector<WeakPtr<CSS::MediaQueryList>> m_media_query_lists;