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31 #ifndef V8EventListenerList_h
32 #define V8EventListenerList_h
34 #include "bindings/core/v8/V8Binding.h"
35 #include "bindings/core/v8/V8EventListener.h"
42 enum ListenerLookupType {
47 // This is a container for V8EventListener objects that uses hidden properties of v8::Object to speed up lookups.
48 class V8EventListenerList {
50 static PassRefPtr<V8EventListener> findWrapper(v8::Local<v8::Value> value, ScriptState* scriptState)
52 ASSERT(scriptState->isolate()->InContext());
53 if (!value->IsObject())
56 v8::Handle<v8::String> wrapperProperty = getHiddenProperty(false, scriptState->isolate());
57 return doFindWrapper(v8::Local<v8::Object>::Cast(value), wrapperProperty, scriptState);
60 template<typename WrapperType>
61 static PassRefPtr<V8EventListener> findOrCreateWrapper(v8::Local<v8::Value>, bool isAttribute, ScriptState*);
63 static void clearWrapper(v8::Handle<v8::Object> listenerObject, bool isAttribute, v8::Isolate* isolate)
65 v8::Handle<v8::String> wrapperProperty = getHiddenProperty(isAttribute, isolate);
66 listenerObject->DeleteHiddenValue(wrapperProperty);
69 static PassRefPtr<EventListener> getEventListener(ScriptState*, v8::Local<v8::Value>, bool isAttribute, ListenerLookupType);
72 static V8EventListener* doFindWrapper(v8::Local<v8::Object> object, v8::Handle<v8::String> wrapperProperty, ScriptState* scriptState)
74 v8::HandleScope scope(scriptState->isolate());
75 ASSERT(scriptState->isolate()->InContext());
76 v8::Local<v8::Value> listener = object->GetHiddenValue(wrapperProperty);
77 if (listener.IsEmpty())
79 return static_cast<V8EventListener*>(v8::External::Cast(*listener)->Value());
82 static inline v8::Handle<v8::String> getHiddenProperty(bool isAttribute, v8::Isolate* isolate)
84 return isAttribute ? v8AtomicString(isolate, "attributeListener") : v8AtomicString(isolate, "listener");
88 template<typename WrapperType>
89 PassRefPtr<V8EventListener> V8EventListenerList::findOrCreateWrapper(v8::Local<v8::Value> value, bool isAttribute, ScriptState* scriptState)
91 v8::Isolate* isolate = scriptState->isolate();
92 ASSERT(isolate->InContext());
93 if (!value->IsObject()
94 // Non-callable attribute setter input is treated as null (no wrapper)
95 || (isAttribute && !value->IsFunction()))
98 v8::Local<v8::Object> object = v8::Local<v8::Object>::Cast(value);
99 v8::Handle<v8::String> wrapperProperty = getHiddenProperty(isAttribute, isolate);
101 V8EventListener* wrapper = doFindWrapper(object, wrapperProperty, scriptState);
105 RefPtr<V8EventListener> wrapperPtr = WrapperType::create(object, isAttribute, scriptState);
107 object->SetHiddenValue(wrapperProperty, v8::External::New(isolate, wrapperPtr.get()));
114 #endif // V8EventListenerList_h