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/*
* Copyright (C) 2009 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
* 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.
*
*/
#ifndef SerializedScriptValue_h
#define SerializedScriptValue_h
#include "ScriptValue.h"
namespace WebCore {
class SerializedObject;
class SerializedArray;
class SharedSerializedData : public RefCounted<SharedSerializedData> {
public:
virtual ~SharedSerializedData() { }
SerializedArray* asArray();
SerializedObject* asObject();
};
class SerializedScriptValue;
class SerializedScriptValueData {
public:
enum SerializedType {
EmptyType,
DateType,
NumberType,
ImmediateType,
ObjectType,
ArrayType,
StringType
};
SerializedType type() const { return m_type; }
static SerializedScriptValueData serialize(JSC::ExecState*, JSC::JSValue);
JSC::JSValue deserialize(JSC::ExecState*, bool mustCopy) const;
~SerializedScriptValueData()
{
if (m_sharedData)
tearDownSerializedData();
}
SerializedScriptValueData()
: m_type(EmptyType)
{
}
explicit SerializedScriptValueData(const String& string)
: m_type(StringType)
, m_string(string.crossThreadString()) // FIXME: Should be able to just share the Rep
{
}
explicit SerializedScriptValueData(JSC::JSValue value)
: m_type(ImmediateType)
{
ASSERT(!value.isCell());
m_data.m_immediate = JSC::JSValue::encode(value);
}
SerializedScriptValueData(SerializedType type, double value)
: m_type(type)
{
m_data.m_double = value;
}
SerializedScriptValueData(RefPtr<SerializedObject>);
SerializedScriptValueData(RefPtr<SerializedArray>);
JSC::JSValue asImmediate() const
{
ASSERT(m_type == ImmediateType);
return JSC::JSValue::decode(m_data.m_immediate);
}
double asDouble() const
{
ASSERT(m_type == NumberType || m_type == DateType);
return m_data.m_double;
}
String asString() const
{
ASSERT(m_type == StringType);
return m_string;
}
SerializedObject* asObject() const
{
ASSERT(m_type == ObjectType);
ASSERT(m_sharedData);
return m_sharedData->asObject();
}
SerializedArray* asArray() const
{
ASSERT(m_type == ArrayType);
ASSERT(m_sharedData);
return m_sharedData->asArray();
}
operator bool() const { return m_type != EmptyType; }
SerializedScriptValueData release()
{
SerializedScriptValueData result = *this;
*this = SerializedScriptValueData();
return result;
}
private:
void tearDownSerializedData();
SerializedType m_type;
RefPtr<SharedSerializedData> m_sharedData;
String m_string;
union {
double m_double;
JSC::EncodedJSValue m_immediate;
} m_data;
};
class SerializedScriptValue : public RefCounted<SerializedScriptValue> {
public:
static PassRefPtr<SerializedScriptValue> create(JSC::ExecState* exec, JSC::JSValue value)
{
return adoptRef(new SerializedScriptValue(SerializedScriptValueData::serialize(exec, value)));
}
static PassRefPtr<SerializedScriptValue> create(String string)
{
return adoptRef(new SerializedScriptValue(SerializedScriptValueData(string)));
}
static PassRefPtr<SerializedScriptValue> create()
{
return adoptRef(new SerializedScriptValue(SerializedScriptValueData()));
}
PassRefPtr<SerializedScriptValue> release()
{
PassRefPtr<SerializedScriptValue> result = adoptRef(new SerializedScriptValue(m_value));
m_value = SerializedScriptValueData();
result->m_mustCopy = true;
return result;
}
String toString()
{
if (m_value.type() != SerializedScriptValueData::StringType)
return "";
return m_value.asString();
}
JSC::JSValue deserialize(JSC::ExecState* exec)
{
if (!m_value)
return JSC::jsNull();
return m_value.deserialize(exec, m_mustCopy);
}
~SerializedScriptValue() {}
private:
SerializedScriptValue(SerializedScriptValueData value)
: m_value(value)
, m_mustCopy(false)
{
}
SerializedScriptValueData m_value;
bool m_mustCopy;
};
}
#endif // SerializedScriptValue_h
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