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/*
* Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
* Copyright (C) 2004-2011, 2013, 2016 Apple Inc. All rights reserved.
* Copyright (C) 2007 Samuel Weinig <sam@webkit.org>
* 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
*/
#include "config.h"
#include "JSDOMConvertStrings.h"
#include "JSDOMGlobalObject.h"
#include "JSTrustedScript.h"
#include "ScriptExecutionContext.h"
#include <JavaScriptCore/HeapInlines.h>
#include <JavaScriptCore/JSCJSValueInlines.h>
#include <wtf/text/StringBuilder.h>
#include <wtf/unicode/CharacterNames.h>
namespace WebCore {
using namespace JSC;
String identifierToString(JSGlobalObject& lexicalGlobalObject, const Identifier& identifier)
{
if (UNLIKELY(identifier.isSymbol())) {
auto scope = DECLARE_THROW_SCOPE(lexicalGlobalObject.vm());
throwTypeError(&lexicalGlobalObject, scope, SymbolCoercionError);
return { };
}
return identifier.string();
}
static inline bool throwIfInvalidByteString(JSGlobalObject& lexicalGlobalObject, JSC::ThrowScope& scope, const String& string)
{
if (UNLIKELY(!string.containsOnlyLatin1())) {
throwTypeError(&lexicalGlobalObject, scope);
return true;
}
return false;
}
String identifierToByteString(JSGlobalObject& lexicalGlobalObject, const Identifier& identifier)
{
VM& vm = lexicalGlobalObject.vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto string = identifierToString(lexicalGlobalObject, identifier);
RETURN_IF_EXCEPTION(scope, { });
if (UNLIKELY(throwIfInvalidByteString(lexicalGlobalObject, scope, string)))
return { };
return string;
}
ConversionResult<IDLByteString> valueToByteString(JSGlobalObject& lexicalGlobalObject, JSValue value)
{
VM& vm = lexicalGlobalObject.vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto string = value.toWTFString(&lexicalGlobalObject);
RETURN_IF_EXCEPTION(scope, ConversionResult<IDLByteString>::exception());
if (UNLIKELY(throwIfInvalidByteString(lexicalGlobalObject, scope, string)))
return ConversionResult<IDLByteString>::exception();
return { WTFMove(string) };
}
ConversionResult<IDLAtomStringAdaptor<IDLByteString>> valueToByteAtomString(JSC::JSGlobalObject& lexicalGlobalObject, JSC::JSValue value)
{
VM& vm = lexicalGlobalObject.vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto string = value.toString(&lexicalGlobalObject)->toAtomString(&lexicalGlobalObject);
RETURN_IF_EXCEPTION(scope, ConversionResult<IDLAtomStringAdaptor<IDLByteString>>::exception());
if (UNLIKELY(throwIfInvalidByteString(lexicalGlobalObject, scope, string.string())))
return ConversionResult<IDLAtomStringAdaptor<IDLByteString>>::exception();
return string;
}
String identifierToUSVString(JSGlobalObject& lexicalGlobalObject, const Identifier& identifier)
{
return replaceUnpairedSurrogatesWithReplacementCharacter(identifierToString(lexicalGlobalObject, identifier));
}
ConversionResult<IDLUSVString> valueToUSVString(JSGlobalObject& lexicalGlobalObject, JSValue value)
{
VM& vm = lexicalGlobalObject.vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto string = value.toWTFString(&lexicalGlobalObject);
RETURN_IF_EXCEPTION(scope, ConversionResult<IDLUSVString>::exception());
return { replaceUnpairedSurrogatesWithReplacementCharacter(WTFMove(string)) };
}
ConversionResult<IDLAtomStringAdaptor<IDLUSVString>> valueToUSVAtomString(JSGlobalObject& lexicalGlobalObject, JSValue value)
{
VM& vm = lexicalGlobalObject.vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto string = value.toString(&lexicalGlobalObject)->toAtomString(&lexicalGlobalObject);
RETURN_IF_EXCEPTION(scope, ConversionResult<IDLAtomStringAdaptor<IDLUSVString>>::exception());
return replaceUnpairedSurrogatesWithReplacementCharacter(WTFMove(string));
}
// https://w3c.github.io/trusted-types/dist/spec/#get-trusted-type-compliant-string-algorithm
ConversionResult<IDLDOMString> trustedScriptCompliantString(JSGlobalObject& global, JSValue input, const String& sink)
{
VM& vm = global.vm();
auto throwScope = DECLARE_THROW_SCOPE(vm);
if (auto* trustedScript = JSTrustedScript::toWrapped(vm, input))
return trustedScript->toString();
RefPtr scriptExecutionContext = jsDynamicCast<JSDOMGlobalObject*>(&global)->scriptExecutionContext();
if (!scriptExecutionContext) {
ASSERT_NOT_REACHED();
return { String() };
}
auto convertedValue = ConversionResult<IDLDOMString> { convert<IDLUSVString>(global, input) };
if (UNLIKELY(convertedValue.hasException(throwScope)))
return ConversionResultException { };
auto stringValueHolder = trustedTypeCompliantString(TrustedType::TrustedScript, *scriptExecutionContext, convertedValue.releaseReturnValue(), sink);
if (stringValueHolder.hasException()) {
propagateException(global, throwScope, stringValueHolder.releaseException());
RETURN_IF_EXCEPTION(throwScope, ConversionResultException { });
}
return stringValueHolder.releaseReturnValue();
}
} // namespace WebCore
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