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/*
* Copyright (C) 2016-2020 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "JSDOMBinding.h"
#include "JSDOMBindingSecurity.h"
#include "JSDOMOperation.h"
#include "LocalDOMWindow.h"
namespace WebCore {
// Wrapper type for JSEventTarget's castedThis because JSDOMWindow and JSWorkerGlobalScope do not inherit JSEventTarget.
class JSEventTargetWrapper {
public:
JSEventTargetWrapper() = default;
JSEventTargetWrapper(EventTarget& wrapped, JSC::JSObject& wrapper)
: m_wrapped(&wrapped)
, m_wrapper(&wrapper)
{ }
bool isNull() const { return !m_wrapped; }
EventTarget& wrapped() { ASSERT(m_wrapped); return *m_wrapped; }
operator JSC::JSObject&() { ASSERT(m_wrapper); return *m_wrapper; }
private:
EventTarget* m_wrapped { nullptr };
JSC::JSObject* m_wrapper { nullptr };
};
JSEventTargetWrapper jsEventTargetCast(JSC::VM&, JSC::JSValue thisValue);
template<> class IDLOperation<JSEventTarget> {
public:
using ClassParameter = JSEventTargetWrapper*;
using Operation = JSC::EncodedJSValue(JSC::JSGlobalObject*, JSC::CallFrame*, ClassParameter);
template<Operation operation, CastedThisErrorBehavior = CastedThisErrorBehavior::Throw>
static JSC::EncodedJSValue call(JSC::JSGlobalObject& lexicalGlobalObject, JSC::CallFrame& callFrame, const char* operationName)
{
auto& vm = JSC::getVM(&lexicalGlobalObject);
auto throwScope = DECLARE_THROW_SCOPE(vm);
auto thisValue = callFrame.thisValue().toThis(&lexicalGlobalObject, JSC::ECMAMode::strict());
auto thisObject = jsEventTargetCast(vm, thisValue.isUndefinedOrNull() ? JSC::JSValue(&lexicalGlobalObject) : thisValue);
if (UNLIKELY(thisObject.isNull()))
return throwThisTypeError(lexicalGlobalObject, throwScope, "EventTarget", operationName);
auto& wrapped = thisObject.wrapped();
if (auto window = dynamicDowncast<LocalDOMWindow>(wrapped)) {
if (!window->frame() || !BindingSecurity::shouldAllowAccessToDOMWindow(&lexicalGlobalObject, *window, ThrowSecurityError))
return JSC::JSValue::encode(JSC::jsUndefined());
}
RELEASE_AND_RETURN(throwScope, (operation(&lexicalGlobalObject, &callFrame, &thisObject)));
}
};
} // namespace WebCore
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