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/*
* Copyright (C) 2011 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.
*/
#ifndef JSDictionary_h
#define JSDictionary_h
#include "MessagePort.h"
#include <interpreter/CallFrame.h>
#include <wtf/Forward.h>
namespace WebCore {
class Dictionary;
class DOMWindow;
class EventTarget;
class Node;
class ScriptValue;
class SerializedScriptValue;
class Storage;
class TrackBase;
class JSDictionary {
public:
JSDictionary(JSC::ExecState* exec, JSC::JSObject* initializerObject)
: m_exec(exec)
, m_initializerObject(initializerObject)
{
}
// Returns false if any exceptions were thrown, regardless of whether the property was found.
template <typename Result>
bool tryGetProperty(const char* propertyName, Result&) const;
template <typename T, typename Result>
bool tryGetProperty(const char* propertyName, T* context, void (*setter)(T* context, const Result&)) const;
// Returns true if the property was found in the dictionary, and the value could be converted to the desired type.
template <typename Result>
bool get(const char* propertyName, Result&) const;
bool getWithUndefinedOrNullCheck(const String& propertyName, String& value) const;
JSC::ExecState* execState() const { return m_exec; }
JSC::JSObject* initializerObject() const { return m_initializerObject; }
bool isValid() const { return m_exec && m_initializerObject; }
private:
template <typename Result>
struct IdentitySetter {
static void identitySetter(Result* context, const Result& result)
{
*context = result;
}
};
enum GetPropertyResult {
ExceptionThrown,
NoPropertyFound,
PropertyFound
};
template <typename T, typename Result>
GetPropertyResult tryGetPropertyAndResult(const char* propertyName, T* context, void (*setter)(T* context, const Result&)) const;
GetPropertyResult tryGetProperty(const char* propertyName, JSC::JSValue&) const;
static void convertValue(JSC::ExecState*, JSC::JSValue, bool& result);
static void convertValue(JSC::ExecState*, JSC::JSValue, int& result);
static void convertValue(JSC::ExecState*, JSC::JSValue, unsigned& result);
static void convertValue(JSC::ExecState*, JSC::JSValue, unsigned short& result);
static void convertValue(JSC::ExecState*, JSC::JSValue, unsigned long long& result);
static void convertValue(JSC::ExecState*, JSC::JSValue, double& result);
static void convertValue(JSC::ExecState*, JSC::JSValue, Dictionary& result);
static void convertValue(JSC::ExecState*, JSC::JSValue, String& result);
static void convertValue(JSC::ExecState*, JSC::JSValue, ScriptValue& result);
static void convertValue(JSC::ExecState*, JSC::JSValue, Vector<String>& result);
static void convertValue(JSC::ExecState*, JSC::JSValue, RefPtr<SerializedScriptValue>& result);
static void convertValue(JSC::ExecState*, JSC::JSValue, RefPtr<DOMWindow>& result);
static void convertValue(JSC::ExecState*, JSC::JSValue, RefPtr<EventTarget>& result);
static void convertValue(JSC::ExecState*, JSC::JSValue, RefPtr<Node>& result);
static void convertValue(JSC::ExecState*, JSC::JSValue, RefPtr<Storage>& result);
static void convertValue(JSC::ExecState*, JSC::JSValue, MessagePortArray& result);
#if ENABLE(VIDEO_TRACK)
static void convertValue(JSC::ExecState*, JSC::JSValue, RefPtr<TrackBase>& result);
#endif
#if ENABLE(MUTATION_OBSERVERS)
static void convertValue(JSC::ExecState*, JSC::JSValue, HashSet<AtomicString>& result);
#endif
JSC::ExecState* m_exec;
JSC::JSObject* m_initializerObject;
};
template <typename T, typename Result>
bool JSDictionary::tryGetProperty(const char* propertyName, T* context, void (*setter)(T* context, const Result&)) const
{
return tryGetPropertyAndResult(propertyName, context, setter) != ExceptionThrown;
}
template <typename Result>
bool JSDictionary::tryGetProperty(const char* propertyName, Result& finalResult) const
{
return tryGetPropertyAndResult(propertyName, &finalResult, IdentitySetter<Result>::identitySetter) != ExceptionThrown;
}
template <typename Result>
bool JSDictionary::get(const char* propertyName, Result& finalResult) const
{
return tryGetPropertyAndResult(propertyName, &finalResult, IdentitySetter<Result>::identitySetter) == PropertyFound;
}
template <typename T, typename Result>
JSDictionary::GetPropertyResult JSDictionary::tryGetPropertyAndResult(const char* propertyName, T* context, void (*setter)(T* context, const Result&)) const
{
JSC::JSValue value;
GetPropertyResult getPropertyResult = tryGetProperty(propertyName, value);
switch (getPropertyResult) {
case ExceptionThrown:
return getPropertyResult;
case PropertyFound: {
Result result;
convertValue(m_exec, value, result);
if (m_exec->hadException())
return ExceptionThrown;
setter(context, result);
break;
}
case NoPropertyFound:
break;
}
return getPropertyResult;
}
} // namespace WebCore
#endif // JSDictionary_h
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