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/*
* Copyright (C) 2016 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 "IDLTypes.h"
#include "JSDOMConvertAny.h"
#include "JSDOMConvertInterface.h"
#include "JSDOMConvertNumbers.h"
#include "JSDOMConvertStrings.h"
namespace WebCore {
namespace Detail {
template<typename IDLType>
struct NullableConversionType;
template<typename IDLType>
struct NullableConversionType {
using Type = typename IDLNullable<IDLType>::ImplementationType;
};
template<typename T>
struct NullableConversionType<IDLInterface<T>> {
using Type = typename Converter<IDLInterface<T>>::ReturnType;
};
template<>
struct NullableConversionType<IDLAny> {
using Type = typename Converter<IDLAny>::ReturnType;
};
}
template<typename T> struct Converter<IDLNullable<T>> : DefaultConverter<IDLNullable<T>> {
using ReturnType = typename Detail::NullableConversionType<T>::Type;
// 1. If Type(V) is not Object, and the conversion to an IDL value is being performed
// due to V being assigned to an attribute whose type is a nullable callback function
// that is annotated with [LegacyTreatNonObjectAsNull], then return the IDL nullable
// type T? value null.
//
// NOTE: Handled elsewhere.
//
// 2. Otherwise, if V is null or undefined, then return the IDL nullable type T? value null.
// 3. Otherwise, return the result of converting V using the rules for the inner IDL type T.
static ReturnType convert(JSC::JSGlobalObject& lexicalGlobalObject, JSC::JSValue value)
{
if (value.isUndefinedOrNull())
return T::nullValue();
return Converter<T>::convert(lexicalGlobalObject, value);
}
static ReturnType convert(JSC::JSGlobalObject& lexicalGlobalObject, JSC::JSValue value, JSC::JSObject& thisObject)
{
if (value.isUndefinedOrNull())
return T::nullValue();
return Converter<T>::convert(lexicalGlobalObject, value, thisObject);
}
static ReturnType convert(JSC::JSGlobalObject& lexicalGlobalObject, JSC::JSValue value, JSDOMGlobalObject& globalObject)
{
if (value.isUndefinedOrNull())
return T::nullValue();
return Converter<T>::convert(lexicalGlobalObject, value, globalObject);
}
template<typename ExceptionThrower = DefaultExceptionThrower>
static ReturnType convert(JSC::JSGlobalObject& lexicalGlobalObject, JSC::JSValue value, ExceptionThrower&& exceptionThrower)
{
if (value.isUndefinedOrNull())
return T::nullValue();
return Converter<T>::convert(lexicalGlobalObject, value, std::forward<ExceptionThrower>(exceptionThrower));
}
template<typename ExceptionThrower = DefaultExceptionThrower>
static ReturnType convert(JSC::JSGlobalObject& lexicalGlobalObject, JSC::JSValue value, JSC::JSObject& thisObject, ExceptionThrower&& exceptionThrower)
{
if (value.isUndefinedOrNull())
return T::nullValue();
return Converter<T>::convert(lexicalGlobalObject, value, thisObject, std::forward<ExceptionThrower>(exceptionThrower));
}
template<typename ExceptionThrower = DefaultExceptionThrower>
static ReturnType convert(JSC::JSGlobalObject& lexicalGlobalObject, JSC::JSValue value, JSDOMGlobalObject& globalObject, ExceptionThrower&& exceptionThrower)
{
if (value.isUndefinedOrNull())
return T::nullValue();
return Converter<T>::convert(lexicalGlobalObject, value, globalObject, std::forward<ExceptionThrower>(exceptionThrower));
}
};
template<typename T> struct JSConverter<IDLNullable<T>> {
using ImplementationType = typename IDLNullable<T>::ImplementationType;
static constexpr bool needsState = JSConverter<T>::needsState;
static constexpr bool needsGlobalObject = JSConverter<T>::needsGlobalObject;
template<typename U>
static JSC::JSValue convert(U&& value)
{
if (T::isNullValue(value))
return JSC::jsNull();
return JSConverter<T>::convert(T::extractValueFromNullable(value));
}
template<typename U>
static JSC::JSValue convert(JSC::JSGlobalObject& lexicalGlobalObject, U&& value)
{
if (T::isNullValue(value))
return JSC::jsNull();
return JSConverter<T>::convert(lexicalGlobalObject, T::extractValueFromNullable(value));
}
template<typename U>
static JSC::JSValue convert(JSC::JSGlobalObject& lexicalGlobalObject, JSDOMGlobalObject& globalObject, U&& value)
{
if (T::isNullValue(value))
return JSC::jsNull();
return JSConverter<T>::convert(lexicalGlobalObject, globalObject, T::extractValueFromNullable(value));
}
template<typename U>
static JSC::JSValue convertNewlyCreated(JSC::JSGlobalObject& lexicalGlobalObject, JSDOMGlobalObject& globalObject, U&& value)
{
if (T::isNullValue(value))
return JSC::jsNull();
return JSConverter<T>::convert(lexicalGlobalObject, globalObject, T::extractValueFromNullable(value));
}
};
} // namespace WebCore
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