LibWeb: Make factory methods of UIEvents::KeyboardEvent fallible

Userland/Libraries/LibWeb/DOM/Document.cpp

@@ -1296,7 +1296,7 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<Event>> Document::create_event(DeprecatedSt
     } else if (Infra::is_ascii_case_insensitive_match(interface, "htmlevents"sv)) {
         event = TRY(Event::create(realm, ""));
     } else if (Infra::is_ascii_case_insensitive_match(interface, "keyboardevent"sv)) {
-        event = UIEvents::KeyboardEvent::create(realm, "");
+        event = TRY(UIEvents::KeyboardEvent::create(realm, ""));
     } else if (Infra::is_ascii_case_insensitive_match(interface, "messageevent"sv)) {
         event = TRY(HTML::MessageEvent::create(realm, ""));
     } else if (Infra::is_ascii_case_insensitive_match(interface, "mouseevent"sv)

Userland/Libraries/LibWeb/Page/EventHandler.cpp

@@ -684,17 +684,17 @@ bool EventHandler::fire_keyboard_event(DeprecatedFlyString const& event_name, HT
                 return fire_keyboard_event(event_name, *browsing_context_container.nested_browsing_context(), key, modifiers, code_point);
         }
 
-        auto event = UIEvents::KeyboardEvent::create_from_platform_event(document->realm(), event_name, key, modifiers, code_point);
-        return !focused_element->dispatch_event(*event);
+        auto event = UIEvents::KeyboardEvent::create_from_platform_event(document->realm(), event_name, key, modifiers, code_point).release_value_but_fixme_should_propagate_errors();
+        return !focused_element->dispatch_event(event);
     }
 
     // FIXME: De-duplicate this. This is just to prevent wasting a KeyboardEvent allocation when recursing into an (i)frame.
-    auto event = UIEvents::KeyboardEvent::create_from_platform_event(document->realm(), event_name, key, modifiers, code_point);
+    auto event = UIEvents::KeyboardEvent::create_from_platform_event(document->realm(), event_name, key, modifiers, code_point).release_value_but_fixme_should_propagate_errors();
 
     if (JS::GCPtr<HTML::HTMLElement> body = document->body())
-        return !body->dispatch_event(*event);
+        return !body->dispatch_event(event);
 
-    return !document->root().dispatch_event(*event);
+    return !document->root().dispatch_event(event);
 }
 
 bool EventHandler::handle_keydown(KeyCode key, unsigned modifiers, u32 code_point)

Userland/Libraries/LibWeb/UIEvents/KeyboardEvent.cpp

@@ -66,7 +66,7 @@ static unsigned long determine_key_code(KeyCode platform_key, u32 code_point)
     return platform_key;
 }
 
-KeyboardEvent* KeyboardEvent::create_from_platform_event(JS::Realm& realm, DeprecatedFlyString const& event_name, KeyCode platform_key, unsigned modifiers, u32 code_point)
+WebIDL::ExceptionOr<JS::NonnullGCPtr<KeyboardEvent>> KeyboardEvent::create_from_platform_event(JS::Realm& realm, DeprecatedFlyString const& event_name, KeyCode platform_key, unsigned modifiers, u32 code_point)
 {
     // FIXME: Figure out what these should actually contain.
     DeprecatedString event_key = key_code_to_string(platform_key);
@@ -104,12 +104,12 @@ bool KeyboardEvent::get_modifier_state(DeprecatedString const& key_arg)
     return false;
 }
 
-KeyboardEvent* KeyboardEvent::create(JS::Realm& realm, DeprecatedFlyString const& event_name, KeyboardEventInit const& event_init)
+WebIDL::ExceptionOr<JS::NonnullGCPtr<KeyboardEvent>> KeyboardEvent::create(JS::Realm& realm, DeprecatedFlyString const& event_name, KeyboardEventInit const& event_init)
 {
-    return realm.heap().allocate<KeyboardEvent>(realm, realm, event_name, event_init).release_allocated_value_but_fixme_should_propagate_errors();
+    return MUST_OR_THROW_OOM(realm.heap().allocate<KeyboardEvent>(realm, realm, event_name, event_init));
 }
 
-KeyboardEvent* KeyboardEvent::construct_impl(JS::Realm& realm, DeprecatedFlyString const& event_name, KeyboardEventInit const& event_init)
+WebIDL::ExceptionOr<JS::NonnullGCPtr<KeyboardEvent>> KeyboardEvent::construct_impl(JS::Realm& realm, DeprecatedFlyString const& event_name, KeyboardEventInit const& event_init)
 {
     return create(realm, event_name, event_init);
 }

Userland/Libraries/LibWeb/UIEvents/KeyboardEvent.h

@@ -28,9 +28,9 @@ class KeyboardEvent final : public UIEvent {
     WEB_PLATFORM_OBJECT(KeyboardEvent, UIEvent);
 
 public:
-    static KeyboardEvent* create(JS::Realm&, DeprecatedFlyString const& event_name, KeyboardEventInit const& event_init = {});
-    static KeyboardEvent* construct_impl(JS::Realm&, DeprecatedFlyString const& event_name, KeyboardEventInit const& event_init);
-    static KeyboardEvent* create_from_platform_event(JS::Realm&, DeprecatedFlyString const& event_name, KeyCode, unsigned modifiers, u32 code_point);
+    static WebIDL::ExceptionOr<JS::NonnullGCPtr<KeyboardEvent>> create(JS::Realm&, DeprecatedFlyString const& event_name, KeyboardEventInit const& event_init = {});
+    static WebIDL::ExceptionOr<JS::NonnullGCPtr<KeyboardEvent>> construct_impl(JS::Realm&, DeprecatedFlyString const& event_name, KeyboardEventInit const& event_init);
+    static WebIDL::ExceptionOr<JS::NonnullGCPtr<KeyboardEvent>> create_from_platform_event(JS::Realm&, DeprecatedFlyString const& event_name, KeyCode, unsigned modifiers, u32 code_point);
 
     virtual ~KeyboardEvent() override;