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/*
* Copyright (C) 2009 Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER 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 DOMDataStore_h
#define DOMDataStore_h
#include "bindings/v8/DOMWrapperMap.h"
#include "bindings/v8/DOMWrapperWorld.h"
#include "bindings/v8/ScriptWrappable.h"
#include "bindings/v8/WrapperTypeInfo.h"
#include <v8.h>
#include "wtf/Noncopyable.h"
#include "wtf/StdLibExtras.h"
namespace WebCore {
class Node;
class DOMDataStore {
WTF_MAKE_NONCOPYABLE(DOMDataStore);
public:
explicit DOMDataStore(WrapperWorldType);
~DOMDataStore();
static DOMDataStore& current(v8::Isolate*);
template<typename V8T, typename T, typename Wrappable>
static bool setReturnValueFromWrapperFast(v8::ReturnValue<v8::Value> returnValue, T* object, v8::Local<v8::Object> holder, Wrappable* wrappable)
{
// What we'd really like to check here is whether we're in the
// main world or in an isolated world. The fastest way to do that
// is to check that there is no isolated world and the 'object'
// is an object that can exist in the main world. The second fastest
// way is to check whether the wrappable's wrapper is the same as
// the holder.
if ((!DOMWrapperWorld::isolatedWorldsExist() && !canExistInWorker(object)) || holderContainsWrapper(holder, wrappable)) {
if (ScriptWrappable::wrapperCanBeStoredInObject(object))
return ScriptWrappable::setReturnValueWithSecurityCheck<V8T>(returnValue, object);
return mainWorldStore().m_wrapperMap.setReturnValueFrom(returnValue, V8T::toInternalPointer(object));
}
return current(returnValue.GetIsolate()).template setReturnValueFrom<V8T>(returnValue, object);
}
template<typename V8T, typename T>
static bool setReturnValueFromWrapper(v8::ReturnValue<v8::Value> returnValue, T* object)
{
if (ScriptWrappable::wrapperCanBeStoredInObject(object) && !canExistInWorker(object)) {
if (LIKELY(!DOMWrapperWorld::isolatedWorldsExist()))
return ScriptWrappable::setReturnValueWithSecurityCheck<V8T>(returnValue, object);
}
return current(returnValue.GetIsolate()).template setReturnValueFrom<V8T>(returnValue, object);
}
template<typename V8T, typename T>
static bool setReturnValueFromWrapperForMainWorld(v8::ReturnValue<v8::Value> returnValue, T* object)
{
if (ScriptWrappable::wrapperCanBeStoredInObject(object))
return ScriptWrappable::setReturnValue(returnValue, object);
return mainWorldStore().m_wrapperMap.setReturnValueFrom(returnValue, V8T::toInternalPointer(object));
}
template<typename V8T, typename T>
static v8::Handle<v8::Object> getWrapper(T* object, v8::Isolate* isolate)
{
if (ScriptWrappable::wrapperCanBeStoredInObject(object) && !canExistInWorker(object)) {
if (LIKELY(!DOMWrapperWorld::isolatedWorldsExist())) {
v8::Handle<v8::Object> result = ScriptWrappable::getUnsafeWrapperFromObject(object).newLocal(isolate);
// Security: always guard against malicious tampering.
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(result.IsEmpty() || result->GetAlignedPointerFromInternalField(v8DOMWrapperObjectIndex) == V8T::toInternalPointer(object));
return result;
}
}
return current(isolate).template get<V8T>(object, isolate);
}
template<typename V8T, typename T>
static void setWrapperReference(const v8::Persistent<v8::Object>& parent, T* child, v8::Isolate* isolate)
{
if (ScriptWrappable::wrapperCanBeStoredInObject(child) && !canExistInWorker(child)) {
if (LIKELY(!DOMWrapperWorld::isolatedWorldsExist())) {
UnsafePersistent<v8::Object> unsafePersistent = ScriptWrappable::getUnsafeWrapperFromObject(child);
// Security: always guard against malicious tampering.
RELEASE_ASSERT_WITH_SECURITY_IMPLICATION(unsafePersistent.isEmpty() || unsafePersistent.value()->GetAlignedPointerFromInternalField(v8DOMWrapperObjectIndex) == V8T::toInternalPointer(child));
unsafePersistent.setReferenceFrom(parent, isolate);
}
}
current(isolate).template setReference<V8T>(parent, child, isolate);
}
template<typename V8T, typename T>
static void setWrapper(T* object, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate, const WrapperConfiguration& configuration)
{
if (ScriptWrappable::wrapperCanBeStoredInObject(object) && !canExistInWorker(object)) {
if (LIKELY(!DOMWrapperWorld::isolatedWorldsExist())) {
ScriptWrappable::setWrapperInObject(object, wrapper, isolate, configuration);
return;
}
}
return current(isolate).template set<V8T>(object, wrapper, isolate, configuration);
}
template<typename V8T, typename T>
static bool containsWrapper(T* object, v8::Isolate* isolate)
{
return current(isolate).template containsWrapper<V8T>(object);
}
template<typename V8T, typename T>
inline v8::Handle<v8::Object> get(T* object, v8::Isolate* isolate)
{
if (ScriptWrappable::wrapperCanBeStoredInObject(object) && m_type == MainWorld)
return ScriptWrappable::getUnsafeWrapperFromObject(object).newLocal(isolate);
return m_wrapperMap.newLocal(V8T::toInternalPointer(object), isolate);
}
template<typename V8T, typename T>
inline void setReference(const v8::Persistent<v8::Object>& parent, T* child, v8::Isolate* isolate)
{
if (ScriptWrappable::wrapperCanBeStoredInObject(child) && m_type == MainWorld) {
ScriptWrappable::getUnsafeWrapperFromObject(child).setReferenceFrom(parent, isolate);
return;
}
m_wrapperMap.setReference(parent, V8T::toInternalPointer(child), isolate);
}
template<typename V8T, typename T>
inline bool setReturnValueFrom(v8::ReturnValue<v8::Value> returnValue, T* object)
{
if (ScriptWrappable::wrapperCanBeStoredInObject(object) && m_type == MainWorld)
return ScriptWrappable::setReturnValue(returnValue, object);
return m_wrapperMap.setReturnValueFrom(returnValue, V8T::toInternalPointer(object));
}
template<typename V8T, typename T>
inline bool containsWrapper(T* object)
{
if (ScriptWrappable::wrapperCanBeStoredInObject(object) && m_type == MainWorld)
return !ScriptWrappable::getUnsafeWrapperFromObject(object).isEmpty();
return m_wrapperMap.containsKey(V8T::toInternalPointer(object));
}
private:
template<typename V8T, typename T>
inline void set(T* object, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate, const WrapperConfiguration& configuration)
{
ASSERT(!!object);
ASSERT(!wrapper.IsEmpty());
if (ScriptWrappable::wrapperCanBeStoredInObject(object) && m_type == MainWorld) {
ScriptWrappable::setWrapperInObject(object, wrapper, isolate, configuration);
return;
}
m_wrapperMap.set(V8T::toInternalPointer(object), wrapper, configuration);
}
static DOMDataStore& mainWorldStore();
static bool canExistInWorker(void*) { return true; }
static bool canExistInWorker(Node*) { return false; }
static bool holderContainsWrapper(v8::Local<v8::Object>, void*)
{
return false;
}
static bool holderContainsWrapper(v8::Local<v8::Object> holder, ScriptWrappable* wrappable)
{
// Verify our assumptions about the main world.
UnsafePersistent<v8::Object> unsafePersistent = wrappable->unsafePersistent();
ASSERT(unsafePersistent.isEmpty() || !(holder == *unsafePersistent.persistent()) || current(v8::Isolate::GetCurrent()).m_type == MainWorld);
return holder == *unsafePersistent.persistent();
}
WrapperWorldType m_type;
DOMWrapperMap<void> m_wrapperMap;
};
} // namespace WebCore
#endif // DOMDataStore_h
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