V8EventListenerList.h [plain text]
#ifndef V8EventListenerList_h
#define V8EventListenerList_h
#include "V8CustomEventListener.h"
#include "V8HiddenPropertyName.h"
#include <v8.h>
#include <wtf/PassRefPtr.h>
namespace WebCore {
class Frame;
class V8EventListenerList {
public:
static PassRefPtr<V8EventListener> findWrapper(v8::Local<v8::Value> value, bool isAttribute)
{
ASSERT(v8::Context::InContext());
if (!value->IsObject())
return 0;
v8::Handle<v8::String> wrapperProperty = getHiddenProperty(isAttribute);
return doFindWrapper(v8::Local<v8::Object>::Cast(value), wrapperProperty);
}
template<typename WrapperType>
static PassRefPtr<V8EventListener> findOrCreateWrapper(v8::Local<v8::Value>, bool isAttribute);
static void clearWrapper(v8::Handle<v8::Object> listenerObject, bool isAttribute)
{
v8::Handle<v8::String> wrapperProperty = getHiddenProperty(isAttribute);
listenerObject->DeleteHiddenValue(wrapperProperty);
}
private:
static V8EventListener* doFindWrapper(v8::Local<v8::Object> object, v8::Handle<v8::String> wrapperProperty)
{
ASSERT(v8::Context::InContext());
v8::HandleScope scope;
v8::Local<v8::Value> listener = object->GetHiddenValue(wrapperProperty);
if (listener.IsEmpty())
return 0;
return static_cast<V8EventListener*>(v8::External::Unwrap(listener));
}
static inline v8::Handle<v8::String> getHiddenProperty(bool isAttribute)
{
return isAttribute ? V8HiddenPropertyName::attributeListener() : V8HiddenPropertyName::listener();
}
};
template<typename WrapperType>
PassRefPtr<V8EventListener> V8EventListenerList::findOrCreateWrapper(v8::Local<v8::Value> value, bool isAttribute)
{
ASSERT(v8::Context::InContext());
if (!value->IsObject())
return 0;
v8::Local<v8::Object> object = v8::Local<v8::Object>::Cast(value);
v8::Handle<v8::String> wrapperProperty = getHiddenProperty(isAttribute);
V8EventListener* wrapper = doFindWrapper(object, wrapperProperty);
if (wrapper)
return wrapper;
PassRefPtr<V8EventListener> wrapperPtr = WrapperType::create(object, isAttribute, WorldContextHandle(UseCurrentWorld));
if (wrapperPtr)
object->SetHiddenValue(wrapperProperty, v8::External::Wrap(wrapperPtr.get()));
return wrapperPtr;
}
}
#endif // V8EventListenerList_h