2 * Copyright (C) 2009 Google Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #ifndef V8EventListenerList_h
32 #define V8EventListenerList_h
34 #include "V8EventListener.h"
35 #include "V8HiddenPropertyName.h"
38 #include <wtf/PassRefPtr.h>
43 // This is a container for V8EventListener objects that uses hidden properties of v8::Object to speed up lookups.
44 class V8EventListenerList {
46 static PassRefPtr<V8EventListener> findWrapper(v8::Local<v8::Value> value, bool isAttribute)
48 ASSERT(v8::Context::InContext());
49 if (!value->IsObject())
52 v8::Handle<v8::String> wrapperProperty = getHiddenProperty(isAttribute);
53 return doFindWrapper(v8::Local<v8::Object>::Cast(value), wrapperProperty);
56 template<typename WrapperType>
57 static PassRefPtr<V8EventListener> findOrCreateWrapper(v8::Local<v8::Value>, bool isAttribute);
59 static void clearWrapper(v8::Handle<v8::Object> listenerObject, bool isAttribute)
61 v8::Handle<v8::String> wrapperProperty = getHiddenProperty(isAttribute);
62 listenerObject->DeleteHiddenValue(wrapperProperty);
66 static V8EventListener* doFindWrapper(v8::Local<v8::Object> object, v8::Handle<v8::String> wrapperProperty)
68 ASSERT(v8::Context::InContext());
69 v8::HandleScope scope;
70 v8::Local<v8::Value> listener = object->GetHiddenValue(wrapperProperty);
71 if (listener.IsEmpty())
73 return static_cast<V8EventListener*>(v8::External::Unwrap(listener));
76 static inline v8::Handle<v8::String> getHiddenProperty(bool isAttribute)
78 return isAttribute ? V8HiddenPropertyName::attributeListener() : V8HiddenPropertyName::listener();
82 template<typename WrapperType>
83 PassRefPtr<V8EventListener> V8EventListenerList::findOrCreateWrapper(v8::Local<v8::Value> value, bool isAttribute)
85 ASSERT(v8::Context::InContext());
86 if (!value->IsObject())
89 v8::Local<v8::Object> object = v8::Local<v8::Object>::Cast(value);
90 v8::Handle<v8::String> wrapperProperty = getHiddenProperty(isAttribute);
92 V8EventListener* wrapper = doFindWrapper(object, wrapperProperty);
96 PassRefPtr<V8EventListener> wrapperPtr = WrapperType::create(object, isAttribute, WorldContextHandle(UseCurrentWorld));
98 object->SetHiddenValue(wrapperProperty, v8::External::Wrap(wrapperPtr.get()));
103 } // namespace WebCore
105 #endif // V8EventListenerList_h