1 /* 2 * Copyright (C) 2012 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 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 13 * distribution. 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. 17 * 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. 29 */ 30 31 #ifndef DOMWrapperMap_h 32 #define DOMWrapperMap_h 33 34 #include "bindings/core/v8/WrapperTypeInfo.h" 35 #include "platform/ScriptForbiddenScope.h" 36 #include "wtf/HashMap.h" 37 #include <v8-util.h> 38 #include <v8.h> 39 40 namespace blink { 41 42 template<class KeyType> 43 class DOMWrapperMap { 44 public: DOMWrapperMap(v8::Isolate * isolate)45 explicit DOMWrapperMap(v8::Isolate* isolate) 46 : m_isolate(isolate) 47 , m_map(isolate) 48 { 49 } 50 newLocal(KeyType * key,v8::Isolate * isolate)51 v8::Handle<v8::Object> newLocal(KeyType* key, v8::Isolate* isolate) 52 { 53 return m_map.Get(key); 54 } 55 setReturnValueFrom(v8::ReturnValue<v8::Value> returnValue,KeyType * key)56 bool setReturnValueFrom(v8::ReturnValue<v8::Value> returnValue, KeyType* key) 57 { 58 return m_map.SetReturnValue(key, returnValue); 59 } 60 setReference(const v8::Persistent<v8::Object> & parent,KeyType * key,v8::Isolate * isolate)61 void setReference(const v8::Persistent<v8::Object>& parent, KeyType* key, v8::Isolate* isolate) 62 { 63 m_map.SetReference(key, parent); 64 } 65 containsKey(KeyType * key)66 bool containsKey(KeyType* key) 67 { 68 return m_map.Contains(key); 69 } 70 set(KeyType * key,v8::Handle<v8::Object> wrapper,const WrapperTypeInfo * wrapperTypeInfo)71 void set(KeyType* key, v8::Handle<v8::Object> wrapper, const WrapperTypeInfo* wrapperTypeInfo) 72 { 73 ASSERT(reinterpret_cast<KeyType*>(toScriptWrappableBase(wrapper)) == key); 74 RELEASE_ASSERT(!containsKey(key)); // See crbug.com/368095 75 v8::UniquePersistent<v8::Object> unique(m_isolate, wrapper); 76 wrapperTypeInfo->configureWrapper(&unique); 77 m_map.Set(key, unique.Pass()); 78 } 79 clear()80 void clear() 81 { 82 m_map.Clear(); 83 } 84 removeAndDispose(KeyType * key)85 void removeAndDispose(KeyType* key) 86 { 87 ASSERT(containsKey(key)); 88 m_map.Remove(key); 89 } 90 91 private: 92 class PersistentValueMapTraits { 93 public: 94 // Map traits: 95 typedef HashMap<KeyType*, v8::PersistentContainerValue> Impl; 96 typedef typename Impl::iterator Iterator; Size(const Impl * impl)97 static size_t Size(const Impl* impl) { return impl->size(); } Empty(Impl * impl)98 static bool Empty(Impl* impl) { return impl->isEmpty(); } Swap(Impl & impl,Impl & other)99 static void Swap(Impl& impl, Impl& other) { impl.swap(other); } Begin(Impl * impl)100 static Iterator Begin(Impl* impl) { return impl->begin(); } End(Impl * impl)101 static Iterator End(Impl* impl) { return impl->end(); } Value(Iterator & iter)102 static v8::PersistentContainerValue Value(Iterator& iter) 103 { 104 return iter->value; 105 } Key(Iterator & iter)106 static KeyType* Key(Iterator& iter) { return iter->key; } Set(Impl * impl,KeyType * key,v8::PersistentContainerValue value)107 static v8::PersistentContainerValue Set( 108 Impl* impl, KeyType* key, v8::PersistentContainerValue value) 109 { 110 v8::PersistentContainerValue oldValue = Get(impl, key); 111 impl->set(key, value); 112 return oldValue; 113 } Get(const Impl * impl,KeyType * key)114 static v8::PersistentContainerValue Get(const Impl* impl, KeyType* key) 115 { 116 return impl->get(key); 117 } 118 Remove(Impl * impl,KeyType * key)119 static v8::PersistentContainerValue Remove(Impl* impl, KeyType* key) 120 { 121 return impl->take(key); 122 } 123 124 // Weak traits: 125 static const v8::PersistentContainerCallbackType kCallbackType = v8::kWeak; 126 typedef v8::PersistentValueMap<KeyType*, v8::Object, PersistentValueMapTraits> MapType; 127 typedef MapType WeakCallbackDataType; 128 WeakCallbackParameter(MapType * map,KeyType * key,v8::Local<v8::Object> & value)129 static WeakCallbackDataType* WeakCallbackParameter(MapType* map, KeyType* key, v8::Local<v8::Object>& value) 130 { 131 return map; 132 } 133 DisposeCallbackData(WeakCallbackDataType * callbackData)134 static void DisposeCallbackData(WeakCallbackDataType* callbackData) { } 135 MapFromWeakCallbackData(const v8::WeakCallbackData<v8::Object,WeakCallbackDataType> & data)136 static MapType* MapFromWeakCallbackData( 137 const v8::WeakCallbackData<v8::Object, WeakCallbackDataType>& data) 138 { 139 return data.GetParameter(); 140 } 141 KeyFromWeakCallbackData(const v8::WeakCallbackData<v8::Object,WeakCallbackDataType> & data)142 static KeyType* KeyFromWeakCallbackData( 143 const v8::WeakCallbackData<v8::Object, WeakCallbackDataType>& data) 144 { 145 return reinterpret_cast<KeyType*>(toScriptWrappableBase(data.GetValue())); 146 } 147 Dispose(v8::Isolate * isolate,v8::UniquePersistent<v8::Object> value,KeyType * key)148 static void Dispose(v8::Isolate* isolate, v8::UniquePersistent<v8::Object> value, KeyType* key) { } 149 }; 150 151 v8::Isolate* m_isolate; 152 typename PersistentValueMapTraits::MapType m_map; 153 }; 154 155 } // namespace blink 156 157 #endif // DOMWrapperMap_h 158