3 files changed, 94 insertions, 0 deletions
diff --git a/Userland/Libraries/LibWeb/SVG/SVGLength.cpp b/Userland/Libraries/LibWeb/SVG/SVGLength.cpp
new file mode 100644
index 0000000000..11c3865479
--- /dev/null
+++ b/Userland/Libraries/LibWeb/SVG/SVGLength.cpp
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2022, Tim Flynn <trflynn89@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/SVG/SVGLength.h>
+
+namespace Web::SVG {
+
+NonnullRefPtr<SVGLength> SVGLength::create(u8 unit_type, float value)
+{
+    return adopt_ref(*new SVGLength(unit_type, value));
+}
+
+SVGLength::SVGLength(u8 unit_type, float value)
+    : m_unit_type(unit_type)
+    , m_value(value)
+{
+}
+
+// https://www.w3.org/TR/SVG11/types.html#__svg__SVGLength__value
+DOM::ExceptionOr<void> SVGLength::set_value(float value)
+{
+    // FIXME: Raise an exception if this <length> is read-only.
+    m_value = value;
+    return {};
+}
+
+}
diff --git a/Userland/Libraries/LibWeb/SVG/SVGLength.h b/Userland/Libraries/LibWeb/SVG/SVGLength.h
new file mode 100644
index 0000000000..9e838775eb
--- /dev/null
+++ b/Userland/Libraries/LibWeb/SVG/SVGLength.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2022, Tim Flynn <trflynn89@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/RefCounted.h>
+#include <AK/Types.h>
+#include <AK/Weakable.h>
+#include <LibWeb/Bindings/Wrappable.h>
+#include <LibWeb/DOM/ExceptionOr.h>
+
+namespace Web::SVG {
+
+// https://www.w3.org/TR/SVG11/types.html#InterfaceSVGLength
+class SVGLength
+    : public RefCounted<SVGLength>
+    , public Bindings::Wrappable
+    , public Weakable<SVGLength> {
+public:
+    using WrapperType = Bindings::SVGLengthWrapper;
+
+    static NonnullRefPtr<SVGLength> create(u8 unit_type, float value);
+    virtual ~SVGLength() = default;
+
+    u8 unit_type() const { return m_unit_type; }
+
+    float value() const { return m_value; }
+    DOM::ExceptionOr<void> set_value(float value);
+
+private:
+    SVGLength(u8 unit_type, float value);
+
+    u8 m_unit_type { 0 };
+    float m_value { 0 };
+};
+
+}
diff --git a/Userland/Libraries/LibWeb/SVG/SVGLength.idl b/Userland/Libraries/LibWeb/SVG/SVGLength.idl
new file mode 100644
index 0000000000..08e4e29e85
--- /dev/null
+++ b/Userland/Libraries/LibWeb/SVG/SVGLength.idl
@@ -0,0 +1,24 @@
+interface SVGLength {
+    const unsigned short SVG_LENGTHTYPE_UNKNOWN = 0;
+    const unsigned short SVG_LENGTHTYPE_NUMBER = 1;
+    const unsigned short SVG_LENGTHTYPE_PERCENTAGE = 2;
+    const unsigned short SVG_LENGTHTYPE_EMS = 3;
+    const unsigned short SVG_LENGTHTYPE_EXS = 4;
+    const unsigned short SVG_LENGTHTYPE_PX = 5;
+    const unsigned short SVG_LENGTHTYPE_CM = 6;
+    const unsigned short SVG_LENGTHTYPE_MM = 7;
+    const unsigned short SVG_LENGTHTYPE_IN = 8;
+    const unsigned short SVG_LENGTHTYPE_PT = 9;
+    const unsigned short SVG_LENGTHTYPE_PC = 10;
+
+    readonly attribute unsigned short unitType;
+
+    // FIXME: Support setraises().
+    attribute float value; // setraises(DOMException);
+
+    // attribute float valueInSpecifiedUnits setraises(DOMException);
+    // attribute DOMString valueAsString setraises(DOMException);
+
+    // void newValueSpecifiedUnits(in unsigned short unitType, in float valueInSpecifiedUnits) raises(DOMException);
+    // void convertToSpecifiedUnits(in unsigned short unitType) raises(DOMException);
+};