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/*
* Copyright (C) 2008 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. ``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
* 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.
*/
#include "config.h"
#include "JSInspectedObjectWrapper.h"
#if ENABLE(INSPECTOR)
#include "JSInspectorCallbackWrapper.h"
#include <runtime/JSGlobalObject.h>
#include <wtf/StdLibExtras.h>
using namespace JSC;
namespace WebCore {
ASSERT_CLASS_FITS_IN_CELL(JSInspectedObjectWrapper);
typedef HashMap<JSObject*, JSInspectedObjectWrapper*> WrapperMap;
typedef HashMap<JSGlobalObject*, WrapperMap*> GlobalObjectWrapperMap;
static GlobalObjectWrapperMap& wrappers()
{
DEFINE_STATIC_LOCAL(GlobalObjectWrapperMap, map, ());
return map;
}
const ClassInfo JSInspectedObjectWrapper::s_info = { "JSInspectedObjectWrapper", &JSQuarantinedObjectWrapper::s_info, 0, 0 };
JSValue JSInspectedObjectWrapper::wrap(ExecState* unwrappedExec, JSValue unwrappedValue)
{
if (!unwrappedValue.isObject())
return unwrappedValue;
JSObject* unwrappedObject = asObject(unwrappedValue);
if (unwrappedObject->inherits(&JSInspectedObjectWrapper::s_info))
return unwrappedObject;
if (WrapperMap* wrapperMap = wrappers().get(unwrappedExec->lexicalGlobalObject()))
if (JSInspectedObjectWrapper* wrapper = wrapperMap->get(unwrappedObject))
return wrapper;
JSValue prototype = unwrappedObject->prototype();
ASSERT(prototype.isNull() || prototype.isObject());
if (prototype.isNull())
return new (unwrappedExec) JSInspectedObjectWrapper(unwrappedExec, unwrappedObject, JSQuarantinedObjectWrapper::createStructure(jsNull()));
ProtectedJSValue wrappedProto = wrap(unwrappedExec, prototype);
return new (unwrappedExec) JSInspectedObjectWrapper(unwrappedExec, unwrappedObject, JSQuarantinedObjectWrapper::createStructure(asObject(wrappedProto)));
}
JSInspectedObjectWrapper::JSInspectedObjectWrapper(ExecState* unwrappedExec, JSObject* unwrappedObject, NonNullPassRefPtr<Structure> structure)
: JSQuarantinedObjectWrapper(unwrappedExec, unwrappedObject, structure)
{
WrapperMap* wrapperMap = wrappers().get(unwrappedGlobalObject());
if (!wrapperMap) {
wrapperMap = new WrapperMap;
wrappers().set(unwrappedGlobalObject(), wrapperMap);
}
ASSERT(!wrapperMap->contains(unwrappedObject));
wrapperMap->set(unwrappedObject, this);
}
JSInspectedObjectWrapper::~JSInspectedObjectWrapper()
{
ASSERT(wrappers().contains(unwrappedGlobalObject()));
WrapperMap* wrapperMap = wrappers().get(unwrappedGlobalObject());
ASSERT(wrapperMap->contains(unwrappedObject()));
wrapperMap->remove(unwrappedObject());
if (wrapperMap->isEmpty()) {
wrappers().remove(unwrappedGlobalObject());
delete wrapperMap;
}
}
JSValue JSInspectedObjectWrapper::prepareIncomingValue(ExecState*, JSValue value) const
{
// The Inspector is only allowed to pass primitive values and wrapped objects to objects from the inspected page.
if (!value.isObject())
return value;
JSQuarantinedObjectWrapper* wrapper = asWrapper(value);
ASSERT_WITH_MESSAGE(wrapper, "Objects passed to JSInspectedObjectWrapper must be wrapped");
if (!wrapper)
return jsUndefined();
if (wrapper->allowsUnwrappedAccessFrom(unwrappedExecState())) {
ASSERT_WITH_MESSAGE(wrapper->inherits(&s_info), "A wrapper contains an object from the inspected page but is not a JSInspectedObjectWrapper");
if (!wrapper->inherits(&s_info))
return jsUndefined();
// Return the unwrapped object so the inspected page never sees one of its own objects in wrapped form.
return wrapper->unwrappedObject();
}
ASSERT_WITH_MESSAGE(wrapper->inherits(&JSInspectorCallbackWrapper::s_info), "A wrapper that was not from the inspected page and is not an Inspector callback was passed to a JSInspectedObjectWrapper");
if (!wrapper->inherits(&JSInspectorCallbackWrapper::s_info))
return jsUndefined();
return wrapper;
}
} // namespace WebCore
#endif // ENABLE(INSPECTOR)
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