LibWeb: Add stub for ValidityState

This fixes https://html5test.com/ as previously an exception was being
thrown after trying to access this attribute which would then result in
a popup about the test failing (and none of the test results being
shown).

Userland/Libraries/LibWeb/CMakeLists.txt

@@ -448,6 +448,7 @@ set(SOURCES
     HTML/WorkerGlobalScope.cpp
     HTML/WorkerLocation.cpp
     HTML/WorkerNavigator.cpp
+    HTML/ValidityState.cpp
     HighResolutionTime/Performance.cpp
     HighResolutionTime/TimeOrigin.cpp
     Infra/Base64.cpp

Userland/Libraries/LibWeb/Forward.h

@@ -467,6 +467,7 @@ class TrackEvent;
 struct TransferDataHolder;
 class TraversableNavigable;
 class UserActivation;
+class ValidityState;
 class VideoTrack;
 class VideoTrackList;
 class Window;

Userland/Libraries/LibWeb/HTML/HTMLInputElement.cpp

@@ -27,6 +27,7 @@
 #include <LibWeb/HTML/HTMLDivElement.h>
 #include <LibWeb/HTML/HTMLFormElement.h>
 #include <LibWeb/HTML/HTMLInputElement.h>
+#include <LibWeb/HTML/ValidityState.h>
 #include <LibWeb/HTML/Numbers.h>
 #include <LibWeb/HTML/Parser/HTMLParser.h>
 #include <LibWeb/HTML/Scripting/Environments.h>
@@ -82,6 +83,17 @@ void HTMLInputElement::visit_edges(Cell::Visitor& visitor)
     visitor.visit(m_image_request);
 }
 
+// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-cva-validity
+JS::NonnullGCPtr<ValidityState const> HTMLInputElement::validity() const
+{
+    auto& vm = this->vm();
+    auto& realm = this->realm();
+
+    dbgln("FIXME: Implement validity attribute getter");
+
+    return vm.heap().allocate<ValidityState>(realm, realm);
+}
+
 JS::GCPtr<Layout::Node> HTMLInputElement::create_layout_node(NonnullRefPtr<CSS::StyleProperties> style)
 {
     if (type_state() == TypeAttributeState::Hidden)

Userland/Libraries/LibWeb/HTML/HTMLInputElement.h

@@ -174,6 +174,8 @@ public:
     virtual void form_associated_element_was_removed(DOM::Node*) override;
     virtual void form_associated_element_attribute_changed(FlyString const&, Optional<String> const&) override;
 
+    JS::NonnullGCPtr<ValidityState const> validity() const;
+
     // ^HTMLElement
     // https://html.spec.whatwg.org/multipage/forms.html#category-label
     virtual bool is_labelable() const override { return type_state() != TypeAttributeState::Hidden; }

Userland/Libraries/LibWeb/HTML/HTMLInputElement.idl

@@ -1,5 +1,6 @@
 #import <HTML/HTMLElement.idl>
 #import <HTML/HTMLFormElement.idl>
+#import <HTML/ValidityState.idl>
 #import <FileAPI/FileList.idl>
 
 // https://html.spec.whatwg.org/multipage/input.html#htmlinputelement
@@ -48,7 +49,7 @@ interface HTMLInputElement : HTMLElement {
     undefined stepDown(optional long n = 1);
 
     [FIXME] readonly attribute boolean willValidate;
-    [FIXME] readonly attribute ValidityState validity;
+    readonly attribute ValidityState validity;
     [FIXME] readonly attribute DOMString validationMessage;
     boolean checkValidity();
     boolean reportValidity();

Userland/Libraries/LibWeb/HTML/ValidityState.cpp

@@ -0,0 +1,26 @@
+/*
+* Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>
+*
+* SPDX-License-Identifier: BSD-2-Clause
+*/
+
+#include <LibWeb/Bindings/Intrinsics.h>
+#include <LibWeb/HTML/ValidityState.h>
+#include <LibWeb/Bindings/ValidityStatePrototype.h>
+
+namespace Web::HTML {
+
+JS_DEFINE_ALLOCATOR(ValidityState);
+
+ValidityState::ValidityState(JS::Realm& realm)
+    : PlatformObject(realm)
+{
+}
+
+void ValidityState::initialize(JS::Realm& realm)
+{
+    Base::initialize(realm);
+    WEB_SET_PROTOTYPE_FOR_INTERFACE(ValidityState);
+}
+
+}

Userland/Libraries/LibWeb/HTML/ValidityState.h

@@ -0,0 +1,27 @@
+/*
+* Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>
+*
+* SPDX-License-Identifier: BSD-2-Clause
+*/
+
+#pragma once
+
+#include <LibWeb/Bindings/PlatformObject.h>
+
+namespace Web::HTML {
+
+// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#validitystate
+class ValidityState final : public Bindings::PlatformObject {
+   WEB_PLATFORM_OBJECT(ValidityState, Bindings::PlatformObject);
+   JS_DECLARE_ALLOCATOR(ValidityState);
+
+public:
+   virtual ~ValidityState() override = default;
+
+private:
+    ValidityState(JS::Realm&);
+
+   virtual void initialize(JS::Realm&) override;
+};
+
+}

Userland/Libraries/LibWeb/HTML/ValidityState.idl

@@ -0,0 +1,15 @@
+// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#validitystate
+[Exposed=Window]
+interface ValidityState {
+    [FIXME] readonly attribute boolean valueMissing;
+    [FIXME] readonly attribute boolean typeMismatch;
+    [FIXME] readonly attribute boolean patternMismatch;
+    [FIXME] readonly attribute boolean tooLong;
+    [FIXME] readonly attribute boolean tooShort;
+    [FIXME] readonly attribute boolean rangeUnderflow;
+    [FIXME] readonly attribute boolean rangeOverflow;
+    [FIXME] readonly attribute boolean stepMismatch;
+    [FIXME] readonly attribute boolean badInput;
+    [FIXME] readonly attribute boolean customError;
+    [FIXME] readonly attribute boolean valid;
+};

Userland/Libraries/LibWeb/idl_files.cmake

@@ -210,6 +210,7 @@ libweb_js_bindings(HTML/TimeRanges)
 libweb_js_bindings(HTML/ToggleEvent)
 libweb_js_bindings(HTML/TrackEvent)
 libweb_js_bindings(HTML/UserActivation)
+libweb_js_bindings(HTML/ValidityState)
 libweb_js_bindings(HTML/VideoTrack)
 libweb_js_bindings(HTML/VideoTrackList)
 libweb_js_bindings(HTML/Window GLOBAL)