LibWeb: Implement HTML DragEvent class

This just defines the class, drag events aren't actually fired yet.

Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/IDLGenerators.cpp

@@ -44,6 +44,7 @@ static bool is_platform_object(Type const& type)
         "CanvasRenderingContext2D"sv,
         "CloseWatcher"sv,
         "CryptoKey"sv,
+        "DataTransfer"sv,
         "Document"sv,
         "DocumentType"sv,
         "DOMRectReadOnly"sv,

Tests/LibWeb/Text/expected/all-window-properties.txt

@@ -76,6 +76,7 @@ Document
 DocumentFragment
 DocumentTimeline
 DocumentType
+DragEvent
 DynamicsCompressorNode
 Element
 ElementInternals

Userland/Libraries/LibWeb/CMakeLists.txt

@@ -267,12 +267,13 @@ set(SOURCES
     HTML/CustomElements/CustomElementName.cpp
     HTML/CustomElements/CustomElementReactionNames.cpp
     HTML/CustomElements/CustomElementRegistry.cpp
+    HTML/DataTransfer.cpp
     HTML/Dates.cpp
     HTML/DecodedImageData.cpp
     HTML/DocumentState.cpp
     HTML/DOMParser.cpp
     HTML/DOMStringMap.cpp
-    HTML/DataTransfer.cpp
+    HTML/DragEvent.cpp
     HTML/ElementInternals.cpp
     HTML/ErrorEvent.cpp
     HTML/EventHandler.cpp

Userland/Libraries/LibWeb/Forward.h

@@ -355,6 +355,7 @@ class DecodedImageData;
 class DocumentState;
 class DOMParser;
 class DOMStringMap;
+class DragEvent;
 class ElementInternals;
 class ErrorEvent;
 class EventHandler;

Userland/Libraries/LibWeb/HTML/DragEvent.cpp

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2024, Maciej <sppmacd@pm.me>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/Bindings/DragEventPrototype.h>
+#include <LibWeb/Bindings/Intrinsics.h>
+#include <LibWeb/HTML/DragEvent.h>
+
+namespace Web::HTML {
+
+JS_DEFINE_ALLOCATOR(DragEvent);
+
+JS::NonnullGCPtr<DragEvent> DragEvent::create(JS::Realm& realm, FlyString const& event_name, DragEventInit const& event_init, double page_x, double page_y, double offset_x, double offset_y)
+{
+    return realm.heap().allocate<DragEvent>(realm, realm, event_name, event_init, page_x, page_y, offset_x, offset_y);
+}
+
+WebIDL::ExceptionOr<JS::NonnullGCPtr<DragEvent>> DragEvent::construct_impl(JS::Realm& realm, FlyString const& event_name, DragEventInit const& event_init)
+{
+    return create(realm, event_name, event_init);
+}
+
+DragEvent::DragEvent(JS::Realm& realm, FlyString const& event_name, DragEventInit const& event_init, double page_x, double page_y, double offset_x, double offset_y)
+    : MouseEvent(realm, event_name, event_init, page_x, page_y, offset_x, offset_y)
+    , m_data_transfer(event_init.data_transfer)
+{
+}
+
+DragEvent::~DragEvent() = default;
+
+void DragEvent::initialize(JS::Realm& realm)
+{
+    Base::initialize(realm);
+    WEB_SET_PROTOTYPE_FOR_INTERFACE(DragEvent);
+}
+
+}

Userland/Libraries/LibWeb/HTML/DragEvent.h

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2024, Maciej <sppmacd@pm.me>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/FlyString.h>
+#include <LibWeb/DOM/Event.h>
+#include <LibWeb/HTML/DataTransfer.h>
+#include <LibWeb/UIEvents/MouseEvent.h>
+
+namespace Web::HTML {
+
+struct DragEventInit : public UIEvents::MouseEventInit {
+    JS::GCPtr<DataTransfer> data_transfer;
+};
+
+// https://html.spec.whatwg.org/multipage/dnd.html#the-dragevent-interface
+class DragEvent : public UIEvents::MouseEvent {
+    WEB_PLATFORM_OBJECT(DragEvent, UIEvents::MouseEvent);
+    JS_DECLARE_ALLOCATOR(DragEvent);
+
+public:
+    [[nodiscard]] static JS::NonnullGCPtr<DragEvent> create(JS::Realm&, FlyString const& event_name, DragEventInit const& event_init = {}, double page_x = 0, double page_y = 0, double offset_x = 0, double offset_y = 0);
+    static WebIDL::ExceptionOr<JS::NonnullGCPtr<DragEvent>> construct_impl(JS::Realm&, FlyString const& event_name, DragEventInit const& event_init);
+
+    virtual ~DragEvent() override;
+
+    JS::GCPtr<DataTransfer> data_transfer() { return m_data_transfer; }
+
+private:
+    DragEvent(JS::Realm&, FlyString const& event_name, DragEventInit const& event_init, double page_x, double page_y, double offset_x, double offset_y);
+
+    virtual void initialize(JS::Realm&) override;
+
+    JS::GCPtr<DataTransfer> m_data_transfer;
+};
+
+}

Userland/Libraries/LibWeb/HTML/DragEvent.idl

@@ -0,0 +1,14 @@
+#import <UIEvents/MouseEvent.idl>
+#import <HTML/DataTransfer.idl>
+
+// https://html.spec.whatwg.org/multipage/dnd.html#the-dragevent-interface
+[Exposed=Window]
+interface DragEvent : MouseEvent {
+    constructor(DOMString type, optional DragEventInit eventInitDict = {});
+
+    readonly attribute DataTransfer? dataTransfer;
+};
+
+dictionary DragEventInit : MouseEventInit {
+    DataTransfer? dataTransfer = null;
+};

Userland/Libraries/LibWeb/idl_files.cmake

@@ -100,9 +100,10 @@ libweb_js_bindings(HTML/CanvasRenderingContext2D)
 libweb_js_bindings(HTML/CloseEvent)
 libweb_js_bindings(HTML/CloseWatcher)
 libweb_js_bindings(HTML/CustomElements/CustomElementRegistry)
+libweb_js_bindings(HTML/DataTransfer)
 libweb_js_bindings(HTML/DOMParser)
 libweb_js_bindings(HTML/DOMStringMap)
-libweb_js_bindings(HTML/DataTransfer)
+libweb_js_bindings(HTML/DragEvent)
 libweb_js_bindings(HTML/ElementInternals)
 libweb_js_bindings(HTML/ErrorEvent)
 libweb_js_bindings(HTML/EventSource)