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LibWeb+WebContent+Browser: Plumb visibility state from GUI to web pages

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OOPWV now reacts to show/hide events and informs LibWeb about the state
change. This makes visibilitychange events fire when switching tabs. :^)
This commit is contained in:
Andreas Kling 2022-09-19 20:50:33 +02:00
parent 5908873b45
commit d4acdac317
14 changed files with 150 additions and 11 deletions
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51
Userland/Libraries/LibWeb/HTML/BrowsingContext.cpp
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@ -1113,7 +1113,7 @@ DOM::ExceptionOr<void> BrowsingContext::traverse_the_history(size_t entry_index,
new_document->set_page_showing(true);
// 3. Update the visibility state of newDocument to "hidden".
new_document->update_the_visibility_state("hidden");
new_document->update_the_visibility_state(VisibilityState::Hidden);
// 4. Fire a page transition event named pageshow at newDocument's relevant global object with true.
auto& window = verify_cast<HTML::Window>(relevant_global_object(*new_document));
@ -1248,18 +1248,55 @@ BrowsingContext const* BrowsingContext::the_one_permitted_sandboxed_navigator()
}
// https://html.spec.whatwg.org/multipage/browsers.html#document-family
bool BrowsingContext::document_family_contains(DOM::Document const& document) const
Vector<JS::Handle<DOM::Document>> BrowsingContext::document_family() const
{
HashTable<DOM::Document const*> family;
HashTable<DOM::Document*> documents;
for (auto& entry : m_session_history) {
if (!entry.document)
continue;
if (family.set(entry.document) == AK::HashSetResult::ReplacedExistingEntry)
if (documents.set(entry.document.ptr()) == AK::HashSetResult::ReplacedExistingEntry)
continue;
// FIXME: The document family of a Document object consists of the union of all the document families of the browsing contexts in the list of the descendant browsing contexts of the Document object.
for (auto& context : entry.document->list_of_descendant_browsing_contexts()) {
for (auto& document : context->document_family()) {
documents.set(document.ptr());
}
}
}
return family.contains(&document);
Vector<JS::Handle<DOM::Document>> family;
for (auto* document : documents) {
family.append(*document);
}
return family;
}
// https://html.spec.whatwg.org/multipage/browsers.html#document-family
bool BrowsingContext::document_family_contains(DOM::Document const& document) const
{
return document_family().first_matching([&](auto& entry) { return entry.ptr() == &document; }).has_value();
}
VisibilityState BrowsingContext::system_visibility_state() const
{
return m_system_visibility_state;
}
// https://html.spec.whatwg.org/multipage/interaction.html#system-visibility-state
void BrowsingContext::set_system_visibility_state(VisibilityState visibility_state)
{
if (m_system_visibility_state == visibility_state)
return;
m_system_visibility_state = visibility_state;
// When a user-agent determines that the system visibility state for top-level browsing context context
// has changed to newState, it must queue a task on the user interaction task source to update
// the visibility state of all the Document objects in the top-level browsing context's document family with newState.
auto document_family = top_level_browsing_context().document_family();
queue_global_task(Task::Source::UserInteraction, Bindings::main_thread_vm().current_realm()->global_object(), [visibility_state, document_family = move(document_family)]() mutable {
for (auto& document : document_family) {
document->update_the_visibility_state(visibility_state);
}
});
}
}