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/*
* Copyright (C) 2012 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 V8PerContextData_h
#define V8PerContextData_h
#include "bindings/v8/CustomElementBinding.h"
#include "bindings/v8/ScopedPersistent.h"
#include "bindings/v8/UnsafePersistent.h"
#include "bindings/v8/V8DOMActivityLogger.h"
#include "bindings/v8/WrapperTypeInfo.h"
#include <v8.h>
#include "wtf/HashMap.h"
#include "wtf/PassOwnPtr.h"
#include "wtf/Vector.h"
#include "wtf/text/AtomicString.h"
#include "wtf/text/AtomicStringHash.h"
namespace WebCore {
class CustomElementDefinition;
struct V8NPObject;
typedef WTF::Vector<V8NPObject*> V8NPObjectVector;
typedef WTF::HashMap<int, V8NPObjectVector> V8NPObjectMap;
enum V8ContextEmbedderDataField {
v8ContextDebugIdIndex,
v8ContextPerContextDataIndex,
v8ContextIsolatedWorld,
// Rather than adding more embedder data fields to v8::Context,
// consider adding the data to V8PerContextData instead.
};
class V8PerContextData {
public:
static PassOwnPtr<V8PerContextData> create(v8::Handle<v8::Context> context)
{
return adoptPtr(new V8PerContextData(context));
}
~V8PerContextData()
{
dispose();
}
bool init();
static V8PerContextData* from(v8::Handle<v8::Context> context)
{
return static_cast<V8PerContextData*>(context->GetAlignedPointerFromEmbedderData(v8ContextPerContextDataIndex));
}
// To create JS Wrapper objects, we create a cache of a 'boiler plate'
// object, and then simply Clone that object each time we need a new one.
// This is faster than going through the full object creation process.
v8::Local<v8::Object> createWrapperFromCache(const WrapperTypeInfo* type)
{
UnsafePersistent<v8::Object> boilerplate = m_wrapperBoilerplates.get(type);
return !boilerplate.isEmpty() ? boilerplate.newLocal(v8::Isolate::GetCurrent())->Clone() : createWrapperFromCacheSlowCase(type);
}
v8::Local<v8::Function> constructorForType(const WrapperTypeInfo* type)
{
UnsafePersistent<v8::Function> function = m_constructorMap.get(type);
if (!function.isEmpty())
return function.newLocal(v8::Isolate::GetCurrent());
return constructorForTypeSlowCase(type);
}
v8::Local<v8::Object> prototypeForType(const WrapperTypeInfo*);
V8NPObjectMap* v8NPObjectMap()
{
return &m_v8NPObjectMap;
}
V8DOMActivityLogger* activityLogger()
{
return m_activityLogger;
}
void setActivityLogger(V8DOMActivityLogger* logger)
{
m_activityLogger = logger;
}
void addCustomElementBinding(CustomElementDefinition*, PassOwnPtr<CustomElementBinding>);
void clearCustomElementBinding(CustomElementDefinition*);
CustomElementBinding* customElementBinding(CustomElementDefinition*);
private:
explicit V8PerContextData(v8::Handle<v8::Context> context)
: m_activityLogger(0)
, m_isolate(v8::Isolate::GetCurrent())
, m_context(m_isolate, context)
, m_customElementBindings(adoptPtr(new CustomElementBindingMap()))
{
}
void dispose();
v8::Local<v8::Object> createWrapperFromCacheSlowCase(const WrapperTypeInfo*);
v8::Local<v8::Function> constructorForTypeSlowCase(const WrapperTypeInfo*);
// For each possible type of wrapper, we keep a boilerplate object.
// The boilerplate is used to create additional wrappers of the same type.
typedef WTF::HashMap<const WrapperTypeInfo*, UnsafePersistent<v8::Object> > WrapperBoilerplateMap;
WrapperBoilerplateMap m_wrapperBoilerplates;
typedef WTF::HashMap<const WrapperTypeInfo*, UnsafePersistent<v8::Function> > ConstructorMap;
ConstructorMap m_constructorMap;
V8NPObjectMap m_v8NPObjectMap;
// We cache a pointer to the V8DOMActivityLogger associated with the world
// corresponding to this context. The ownership of the pointer is retained
// by the DOMActivityLoggerMap in DOMWrapperWorld.
V8DOMActivityLogger* m_activityLogger;
v8::Isolate* m_isolate;
v8::Persistent<v8::Context> m_context;
ScopedPersistent<v8::Value> m_errorPrototype;
typedef WTF::HashMap<CustomElementDefinition*, OwnPtr<CustomElementBinding> > CustomElementBindingMap;
OwnPtr<CustomElementBindingMap> m_customElementBindings;
};
class V8PerContextDebugData {
public:
static bool setContextDebugData(v8::Handle<v8::Context>, const char* worldName, int debugId);
static int contextDebugId(v8::Handle<v8::Context>);
};
} // namespace WebCore
#endif // V8PerContextData_h