LibWeb: Stub out SVGTransformList

Author: https://github.com/MacDue
Commit: https://github.com/SerenityOS/serenity/commit/3bab4fbae9
Pull-request: https://github.com/SerenityOS/serenity/pull/23793
Reviewed-by: https://github.com/shannonbooth

Userland/Libraries/LibWeb/CMakeLists.txt

@@ -623,6 +623,7 @@ set(SOURCES
     SVG/SVGTextPositioningElement.cpp
     SVG/SVGTitleElement.cpp
     SVG/SVGTransform.cpp
+    SVG/SVGTransformList.cpp
     SVG/SVGTSpanElement.cpp
     SVG/SVGUseElement.cpp
     SVG/TagNames.cpp

Userland/Libraries/LibWeb/SVG/SVGTransformList.cpp

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2024, MacDue <macdue@dueutil.tech>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/Bindings/Intrinsics.h>
+#include <LibWeb/SVG/SVGTransformList.h>
+#include <LibWeb/WebIDL/ExceptionOr.h>
+
+namespace Web::SVG {
+
+JS_DEFINE_ALLOCATOR(SVGTransformList);
+
+JS::NonnullGCPtr<SVGTransformList> SVGTransformList::create(JS::Realm& realm)
+{
+    return realm.heap().allocate<SVGTransformList>(realm, realm);
+}
+
+SVGTransformList::~SVGTransformList() = default;
+
+SVGTransformList::SVGTransformList(JS::Realm& realm)
+    : PlatformObject(realm) {};
+
+// https://svgwg.org/svg2-draft/single-page.html#types-__svg__SVGNameList__getItem
+WebIDL::ExceptionOr<JS::NonnullGCPtr<SVGTransform>> SVGTransformList::get_item(WebIDL::UnsignedLong index)
+{
+    // 1. If index is greater than or equal to the length of the list, then throw an IndexSizeError.
+    if (index >= m_transforms.size())
+        return WebIDL::IndexSizeError::create(realm(), "SVGTransformList index out of bounds"_fly_string);
+    // 2. Return the element in the list at position index.
+    return m_transforms.at(index);
+}
+
+// https://svgwg.org/svg2-draft/single-page.html#types-__svg__SVGNameList__appendItem
+JS::NonnullGCPtr<SVGTransform> SVGTransformList::append_item(JS::NonnullGCPtr<SVGTransform> new_item)
+{
+    // FIXME: This does not implement the steps from the specification.
+    m_transforms.append(new_item);
+    return new_item;
+}
+
+void SVGTransformList::initialize(JS::Realm& realm)
+{
+    Base::initialize(realm);
+    WEB_SET_PROTOTYPE_FOR_INTERFACE(SVGTransformList);
+}
+
+void SVGTransformList::visit_edges(Cell::Visitor& visitor)
+{
+    Base::visit_edges(visitor);
+    for (auto transform : m_transforms)
+        transform->visit_edges(visitor);
+}
+
+}

Userland/Libraries/LibWeb/SVG/SVGTransformList.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2024, MacDue <macdue@dueutil.tech>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Vector.h>
+#include <LibWeb/Bindings/PlatformObject.h>
+#include <LibWeb/SVG/SVGTransform.h>
+#include <LibWeb/WebIDL/Types.h>
+
+namespace Web::SVG {
+
+// https://svgwg.org/svg2-draft/single-page.html#coords-InterfaceSVGTransformList
+class SVGTransformList final : public Bindings::PlatformObject {
+    WEB_PLATFORM_OBJECT(SVGTransformList, Bindings::PlatformObject);
+    JS_DECLARE_ALLOCATOR(SVGTransformList);
+
+public:
+    [[nodiscard]] static JS::NonnullGCPtr<SVGTransformList> create(JS::Realm& realm);
+    virtual ~SVGTransformList() override;
+
+    WebIDL::ExceptionOr<JS::NonnullGCPtr<SVGTransform>> get_item(WebIDL::UnsignedLong index);
+
+    JS::NonnullGCPtr<SVGTransform> append_item(JS::NonnullGCPtr<SVGTransform> new_item);
+
+private:
+    SVGTransformList(JS::Realm& realm);
+
+    virtual void initialize(JS::Realm& realm) override;
+    virtual void visit_edges(Cell::Visitor& visitor) override;
+
+    Vector<JS::NonnullGCPtr<SVGTransform>> m_transforms;
+};
+
+}

Userland/Libraries/LibWeb/SVG/SVGTransformList.idl

@@ -0,0 +1,21 @@
+#import <SVG/SVGTransform.idl>
+
+// https://svgwg.org/svg2-draft/single-page.html#coords-InterfaceSVGTransformList
+[Exposed=Window]
+interface SVGTransformList {
+  // FIXME: readonly attribute unsigned long length;
+  // FIXME: readonly attribute unsigned long numberOfItems;
+
+  // FIXME: undefined clear();
+  // FIXME: SVGTransform initialize(SVGTransform newItem);
+  getter SVGTransform getItem(unsigned long index);
+  // FIXME: SVGTransform insertItemBefore(SVGTransform newItem, unsigned long index);
+  // FIXME: SVGTransform replaceItem(SVGTransform newItem, unsigned long index);
+  // FIXME: SVGTransform removeItem(unsigned long index);
+  SVGTransform appendItem(SVGTransform newItem);
+  // FIXME: setter undefined (unsigned long index, SVGTransform newItem);
+
+  // Additional methods not common to other list interfaces.
+  // FIXME: SVGTransform createSVGTransformFromMatrix(optional DOMMatrix2DInit matrix = {});
+  // FIXME: SVGTransform? consolidate();
+};

Userland/Libraries/LibWeb/idl_files.cmake

@@ -270,6 +270,7 @@ libweb_js_bindings(SVG/SVGTextPathElement)
 libweb_js_bindings(SVG/SVGTextPositioningElement)
 libweb_js_bindings(SVG/SVGTitleElement)
 libweb_js_bindings(SVG/SVGTransform)
+libweb_js_bindings(SVG/SVGTransformList)
 libweb_js_bindings(SVG/SVGTSpanElement)
 libweb_js_bindings(SVG/SVGUseElement)
 libweb_js_bindings(Selection/Selection)