1 files changed, 105 insertions, 0 deletions
diff --git a/src/bun.js/bindings/webcore/JSDOMBuiltinConstructor.h b/src/bun.js/bindings/webcore/JSDOMBuiltinConstructor.h
new file mode 100644
index 000000000..733a880f3
--- /dev/null
+++ b/src/bun.js/bindings/webcore/JSDOMBuiltinConstructor.h
@@ -0,0 +1,105 @@
+/*
+ *  Copyright (C) 2015, 2016 Canon Inc. All rights reserved.
+ *  Copyright (C) 2016-2021 Apple Inc. All rights reserved.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2 of the License, or (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#pragma once
+
+#include "JSDOMBuiltinConstructorBase.h"
+#include "JSDOMExceptionHandling.h"
+#include "JSDOMWrapperCache.h"
+
+namespace WebCore {
+
+template<typename JSClass> class JSDOMBuiltinConstructor final : public JSDOMBuiltinConstructorBase {
+public:
+    using Base = JSDOMBuiltinConstructorBase;
+
+    static JSDOMBuiltinConstructor* create(JSC::VM&, JSC::Structure*, JSDOMGlobalObject&);
+    static JSC::Structure* createStructure(JSC::VM&, JSC::JSGlobalObject&, JSC::JSValue prototype);
+
+    DECLARE_INFO;
+
+    // Usually defined for each specialization class.
+    static JSC::JSValue prototypeForStructure(JSC::VM&, const JSDOMGlobalObject&);
+
+    static JSC::EncodedJSValue JSC_HOST_CALL_ATTRIBUTES construct(JSC::JSGlobalObject*, JSC::CallFrame*);
+
+private:
+    JSDOMBuiltinConstructor(JSC::VM& vm, JSC::Structure* structure)
+        : Base(vm, structure, construct)
+    {
+    }
+
+    void finishCreation(JSC::VM&, JSDOMGlobalObject&);
+
+    JSC::Structure* getDOMStructureForJSObject(JSC::JSGlobalObject*, JSC::JSObject* newTarget);
+
+    // Usually defined for each specialization class.
+    void initializeProperties(JSC::VM&, JSDOMGlobalObject&) {}
+    // Must be defined for each specialization class.
+    JSC::FunctionExecutable* initializeExecutable(JSC::VM&);
+};
+
+template<typename JSClass> inline JSDOMBuiltinConstructor<JSClass>* JSDOMBuiltinConstructor<JSClass>::create(JSC::VM& vm, JSC::Structure* structure, JSDOMGlobalObject& globalObject)
+{
+    JSDOMBuiltinConstructor* constructor = new (NotNull, JSC::allocateCell<JSDOMBuiltinConstructor>(vm)) JSDOMBuiltinConstructor(vm, structure);
+    constructor->finishCreation(vm, globalObject);
+    return constructor;
+}
+
+template<typename JSClass> inline JSC::Structure* JSDOMBuiltinConstructor<JSClass>::createStructure(JSC::VM& vm, JSC::JSGlobalObject& globalObject, JSC::JSValue prototype)
+{
+    return JSC::Structure::create(vm, &globalObject, prototype, JSC::TypeInfo(JSC::InternalFunctionType, StructureFlags), info());
+}
+
+template<typename JSClass> inline void JSDOMBuiltinConstructor<JSClass>::finishCreation(JSC::VM& vm, JSDOMGlobalObject& globalObject)
+{
+    Base::finishCreation(vm);
+    ASSERT(inherits(info()));
+    setInitializeFunction(vm, *JSC::JSFunction::create(vm, initializeExecutable(vm), &globalObject));
+    initializeProperties(vm, globalObject);
+}
+
+template<typename JSClass> inline JSC::Structure* JSDOMBuiltinConstructor<JSClass>::getDOMStructureForJSObject(JSC::JSGlobalObject* lexicalGlobalObject, JSC::JSObject* newTarget)
+{
+    auto& vm = JSC::getVM(lexicalGlobalObject);
+
+    if (LIKELY(newTarget == this))
+        return getDOMStructure<JSClass>(vm, *globalObject());
+
+    auto scope = DECLARE_THROW_SCOPE(vm);
+    auto* newTargetGlobalObject = JSC::getFunctionRealm(lexicalGlobalObject, newTarget);
+    RETURN_IF_EXCEPTION(scope, nullptr);
+    auto* baseStructure = getDOMStructure<JSClass>(vm, *JSC::jsCast<JSDOMGlobalObject*>(newTargetGlobalObject));
+    RELEASE_AND_RETURN(scope, JSC::InternalFunction::createSubclassStructure(lexicalGlobalObject, newTarget, baseStructure));
+}
+
+template<typename JSClass> inline JSC::EncodedJSValue JSC_HOST_CALL_ATTRIBUTES JSDOMBuiltinConstructor<JSClass>::construct(JSC::JSGlobalObject* lexicalGlobalObject, JSC::CallFrame* callFrame)
+{
+    ASSERT(callFrame);
+    auto* castedThis = JSC::jsCast<JSDOMBuiltinConstructor*>(callFrame->jsCallee());
+    auto* structure = castedThis->getDOMStructureForJSObject(lexicalGlobalObject, asObject(callFrame->newTarget()));
+    if (UNLIKELY(!structure))
+        return {};
+
+    auto* jsObject = JSClass::create(structure, castedThis->globalObject());
+    JSC::call(lexicalGlobalObject, castedThis->initializeFunction(), jsObject, JSC::ArgList(callFrame), "This error should never occur: initialize function is guaranteed to be callable."_s);
+    return JSC::JSValue::encode(jsObject);
+}
+
+} // namespace WebCore