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/*
* Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
* Copyright (C) 2003-2006, 2008-2009, 2013, 2016 Apple Inc. All rights reserved.
* Copyright (C) 2007 Samuel Weinig <sam@webkit.org>
* Copyright (C) 2009 Google, Inc. All rights reserved.
* Copyright (C) 2012 Ericsson AB. All rights reserved.
* Copyright (C) 2013 Michael Pruett <michael@68k.org>
*
* 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 "JSDOMExceptionHandling.h"
namespace WebCore {
enum class CastedThisErrorBehavior { Throw, ReturnEarly, RejectPromise, Assert };
template<typename JSClass>
struct BindingCaller {
using AttributeSetterFunction = bool(JSC::ExecState&, JSClass&, JSC::JSValue, JSC::ThrowScope&);
using AttributeGetterFunction = JSC::JSValue(JSC::ExecState&, JSClass&, JSC::ThrowScope&);
using OperationCallerFunction = JSC::EncodedJSValue(JSC::ExecState*, JSClass*, JSC::ThrowScope&);
using PromiseOperationCallerFunction = JSC::EncodedJSValue(JSC::ExecState*, JSClass*, Ref<DeferredPromise>&&, JSC::ThrowScope&);
static JSClass* castForAttribute(JSC::ExecState&, JSC::EncodedJSValue);
static JSClass* castForOperation(JSC::ExecState&);
template<PromiseOperationCallerFunction operationCaller, CastedThisErrorBehavior shouldThrow = CastedThisErrorBehavior::RejectPromise>
static JSC::EncodedJSValue callPromiseOperation(JSC::ExecState* state, Ref<DeferredPromise>&& promise, const char* operationName)
{
ASSERT(state);
auto throwScope = DECLARE_THROW_SCOPE(state->vm());
auto* thisObject = castForOperation(*state);
if (shouldThrow != CastedThisErrorBehavior::Assert && UNLIKELY(!thisObject))
return rejectPromiseWithThisTypeError(promise.get(), JSClass::info()->className, operationName);
ASSERT(thisObject);
ASSERT_GC_OBJECT_INHERITS(thisObject, JSClass::info());
// FIXME: We should refactor the binding generated code to use references for state and thisObject.
return operationCaller(state, thisObject, WTFMove(promise), throwScope);
}
template<OperationCallerFunction operationCaller, CastedThisErrorBehavior shouldThrow = CastedThisErrorBehavior::Throw>
static JSC::EncodedJSValue callOperation(JSC::ExecState* state, const char* operationName)
{
ASSERT(state);
auto throwScope = DECLARE_THROW_SCOPE(state->vm());
auto* thisObject = castForOperation(*state);
if (shouldThrow != CastedThisErrorBehavior::Assert && UNLIKELY(!thisObject)) {
if (shouldThrow == CastedThisErrorBehavior::Throw)
return throwThisTypeError(*state, throwScope, JSClass::info()->className, operationName);
// For custom promise-returning operations
return rejectPromiseWithThisTypeError(*state, JSClass::info()->className, operationName);
}
ASSERT(thisObject);
ASSERT_GC_OBJECT_INHERITS(thisObject, JSClass::info());
// FIXME: We should refactor the binding generated code to use references for state and thisObject.
return operationCaller(state, thisObject, throwScope);
}
template<AttributeSetterFunction setter, CastedThisErrorBehavior shouldThrow = CastedThisErrorBehavior::Throw>
static bool setAttribute(JSC::ExecState* state, JSC::EncodedJSValue thisValue, JSC::EncodedJSValue encodedValue, const char* attributeName)
{
ASSERT(state);
auto throwScope = DECLARE_THROW_SCOPE(state->vm());
auto* thisObject = castForAttribute(*state, thisValue);
if (UNLIKELY(!thisObject))
return (shouldThrow == CastedThisErrorBehavior::Throw) ? throwSetterTypeError(*state, throwScope, JSClass::info()->className, attributeName) : false;
return setter(*state, *thisObject, JSC::JSValue::decode(encodedValue), throwScope);
}
template<AttributeGetterFunction getter, CastedThisErrorBehavior shouldThrow = CastedThisErrorBehavior::Throw>
static JSC::EncodedJSValue attribute(JSC::ExecState* state, JSC::EncodedJSValue thisValue, const char* attributeName)
{
ASSERT(state);
auto throwScope = DECLARE_THROW_SCOPE(state->vm());
auto* thisObject = castForAttribute(*state, thisValue);
if (UNLIKELY(!thisObject)) {
if (shouldThrow == CastedThisErrorBehavior::Throw)
return throwGetterTypeError(*state, throwScope, JSClass::info()->className, attributeName);
if (shouldThrow == CastedThisErrorBehavior::RejectPromise)
return rejectPromiseWithGetterTypeError(*state, JSClass::info()->className, attributeName);
return JSC::JSValue::encode(JSC::jsUndefined());
}
return JSC::JSValue::encode(getter(*state, *thisObject, throwScope));
}
};
} // namespace WebCore
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