LibWeb: Implement SVGLengthList

Author: https://github.com/gmta
Commit: 797e6dd4eb
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6878

Libraries/LibWeb/SVG/SVGLengthList.cpp

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2025, Jelle Raaijmakers <jelle@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/Bindings/Intrinsics.h>
+#include <LibWeb/Bindings/SVGLengthListPrototype.h>
+#include <LibWeb/SVG/SVGLengthList.h>
+
+namespace Web::SVG {
+
+GC_DEFINE_ALLOCATOR(SVGLengthList);
+
+GC::Ref<SVGLengthList> SVGLengthList::create(JS::Realm& realm, Vector<GC::Ref<SVGLength>> items, ReadOnlyList read_only)
+{
+    return realm.create<SVGLengthList>(realm, move(items), read_only);
+}
+
+GC::Ref<SVGLengthList> SVGLengthList::create(JS::Realm& realm, ReadOnlyList read_only)
+{
+    return realm.create<SVGLengthList>(realm, read_only);
+}
+
+SVGLengthList::SVGLengthList(JS::Realm& realm, Vector<GC::Ref<SVGLength>> items, ReadOnlyList read_only)
+    : Bindings::PlatformObject(realm)
+    , SVGList(realm, move(items), read_only)
+{
+}
+
+SVGLengthList::SVGLengthList(JS::Realm& realm, ReadOnlyList read_only)
+    : Bindings::PlatformObject(realm)
+    , SVGList(realm, read_only)
+{
+}
+
+void SVGLengthList::initialize(JS::Realm& realm)
+{
+    WEB_SET_PROTOTYPE_FOR_INTERFACE(SVGLengthList);
+    Base::initialize(realm);
+}
+
+void SVGLengthList::visit_edges(Visitor& visitor)
+{
+    Base::visit_edges(visitor);
+    SVGList::visit_edges(visitor);
+}
+
+}

Libraries/LibWeb/SVG/SVGLengthList.h

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2025, Jelle Raaijmakers <jelle@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibWeb/SVG/SVGLength.h>
+#include <LibWeb/SVG/SVGList.h>
+
+namespace Web::SVG {
+
+// https://svgwg.org/svg2-draft/types.html#InterfaceSVGLengthList
+class SVGLengthList final
+    : public Bindings::PlatformObject
+    , public SVGList<GC::Ref<SVGLength>> {
+    WEB_PLATFORM_OBJECT(SVGLengthList, Bindings::PlatformObject);
+    GC_DECLARE_ALLOCATOR(SVGLengthList);
+
+public:
+    [[nodiscard]] static GC::Ref<SVGLengthList> create(JS::Realm& realm, Vector<GC::Ref<SVGLength>>, ReadOnlyList);
+    [[nodiscard]] static GC::Ref<SVGLengthList> create(JS::Realm& realm, ReadOnlyList);
+    virtual ~SVGLengthList() override = default;
+
+private:
+    SVGLengthList(JS::Realm&, Vector<GC::Ref<SVGLength>>, ReadOnlyList);
+    SVGLengthList(JS::Realm&, ReadOnlyList);
+
+    virtual void initialize(JS::Realm&) override;
+    virtual void visit_edges(Visitor&) override;
+};
+
+}

Libraries/LibWeb/SVG/SVGLengthList.idl

@@ -0,0 +1,18 @@
+#import <SVG/SVGLength.idl>
+
+// https://svgwg.org/svg2-draft/types.html#InterfaceSVGLengthList
+[Exposed=Window]
+interface SVGLengthList {
+
+    readonly attribute unsigned long length;
+    readonly attribute unsigned long numberOfItems;
+
+    undefined clear();
+    SVGLength initialize(SVGLength newItem);
+    getter SVGLength getItem(unsigned long index);
+    SVGLength insertItemBefore(SVGLength newItem, unsigned long index);
+    SVGLength replaceItem(SVGLength newItem, unsigned long index);
+    SVGLength removeItem(unsigned long index);
+    SVGLength appendItem(SVGLength newItem);
+    setter undefined (unsigned long index, SVGLength newItem);
+};

Libraries/LibWeb/SVG/SVGList.cpp

@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <LibWeb/SVG/SVGLength.h>
 #include <LibWeb/SVG/SVGList.h>
 #include <LibWeb/SVG/SVGNumber.h>
 #include <LibWeb/SVG/SVGTransform.h>
@@ -204,6 +205,7 @@ WebIDL::ExceptionOr<T> SVGList<T>::append_item(T new_item)
     return new_item;
 }
 
+template class SVGList<GC::Ref<SVGLength>>;
 template class SVGList<GC::Ref<SVGNumber>>;
 template class SVGList<GC::Ref<SVGTransform>>;
 

Libraries/LibWeb/SVG/SVGTransformList.cpp

@@ -8,7 +8,6 @@
 #include <LibWeb/Bindings/Intrinsics.h>
 #include <LibWeb/Bindings/SVGTransformListPrototype.h>
 #include <LibWeb/SVG/SVGTransformList.h>
-#include <LibWeb/WebIDL/ExceptionOr.h>
 
 namespace Web::SVG {