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| 1 /* | |
| 2 * Copyright (C) 2010 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 WrapperTypeInfo_h | |
| 32 #define WrapperTypeInfo_h | |
| 33 | |
| 34 #include "gin/public/wrapper_info.h" | |
| 35 #include "platform/heap/Handle.h" | |
| 36 #include "wtf/Assertions.h" | |
| 37 #include <v8.h> | |
| 38 | |
| 39 namespace WebCore { | |
| 40 | |
| 41 class ActiveDOMObject; | |
| 42 class EventTarget; | |
| 43 class Node; | |
| 44 | |
| 45 static const int v8DOMWrapperTypeIndex = static_cast<int>(gin::kWrapperInfoI
ndex); | |
| 46 static const int v8DOMWrapperObjectIndex = static_cast<int>(gin::kEncodedVal
ueIndex); | |
| 47 static const int v8DefaultWrapperInternalFieldCount = static_cast<int>(gin::
kNumberOfInternalFields); | |
| 48 static const int v8PrototypeTypeIndex = 0; | |
| 49 static const int v8PrototypeInternalFieldcount = 1; | |
| 50 | |
| 51 static const uint16_t v8DOMNodeClassId = 1; | |
| 52 static const uint16_t v8DOMObjectClassId = 2; | |
| 53 | |
| 54 typedef v8::Handle<v8::FunctionTemplate> (*DomTemplateFunction)(v8::Isolate*
); | |
| 55 typedef void (*DerefObjectFunction)(void*); | |
| 56 typedef ActiveDOMObject* (*ToActiveDOMObjectFunction)(v8::Handle<v8::Object>
); | |
| 57 typedef EventTarget* (*ToEventTargetFunction)(v8::Handle<v8::Object>); | |
| 58 typedef void (*ResolveWrapperReachabilityFunction)(void*, const v8::Persiste
nt<v8::Object>&, v8::Isolate*); | |
| 59 typedef void (*InstallPerContextEnabledPrototypePropertiesFunction)(v8::Hand
le<v8::Object>, v8::Isolate*); | |
| 60 | |
| 61 enum WrapperTypePrototype { | |
| 62 WrapperTypeObjectPrototype, | |
| 63 WrapperTypeExceptionPrototype | |
| 64 }; | |
| 65 | |
| 66 enum GCType { | |
| 67 GarbageCollectedObject, | |
| 68 WillBeGarbageCollectedObject, | |
| 69 RefCountedObject, | |
| 70 }; | |
| 71 | |
| 72 inline void setObjectGroup(void* object, const v8::Persistent<v8::Object>& w
rapper, v8::Isolate* isolate) | |
| 73 { | |
| 74 isolate->SetObjectGroupId(wrapper, v8::UniqueId(reinterpret_cast<intptr_
t>(object))); | |
| 75 } | |
| 76 | |
| 77 // This struct provides a way to store a bunch of information that is helpfu
l when unwrapping | |
| 78 // v8 objects. Each v8 bindings class has exactly one static WrapperTypeInfo
member, so | |
| 79 // comparing pointers is a safe way to determine if types match. | |
| 80 struct WrapperTypeInfo { | |
| 81 | |
| 82 static const WrapperTypeInfo* unwrap(v8::Handle<v8::Value> typeInfoWrapp
er) | |
| 83 { | |
| 84 return reinterpret_cast<const WrapperTypeInfo*>(v8::External::Cast(*
typeInfoWrapper)->Value()); | |
| 85 } | |
| 86 | |
| 87 | |
| 88 bool equals(const WrapperTypeInfo* that) const | |
| 89 { | |
| 90 return this == that; | |
| 91 } | |
| 92 | |
| 93 bool isSubclass(const WrapperTypeInfo* that) const | |
| 94 { | |
| 95 for (const WrapperTypeInfo* current = this; current; current = curre
nt->parentClass) { | |
| 96 if (current == that) | |
| 97 return true; | |
| 98 } | |
| 99 | |
| 100 return false; | |
| 101 } | |
| 102 | |
| 103 v8::Handle<v8::FunctionTemplate> domTemplate(v8::Isolate* isolate) const | |
| 104 { | |
| 105 return domTemplateFunction(isolate); | |
| 106 } | |
| 107 | |
| 108 void installPerContextEnabledMethods(v8::Handle<v8::Object> prototypeTem
plate, v8::Isolate* isolate) const | |
| 109 { | |
| 110 if (installPerContextEnabledMethodsFunction) | |
| 111 installPerContextEnabledMethodsFunction(prototypeTemplate, isola
te); | |
| 112 } | |
| 113 | |
| 114 ActiveDOMObject* toActiveDOMObject(v8::Handle<v8::Object> object) const | |
| 115 { | |
| 116 if (!toActiveDOMObjectFunction) | |
| 117 return 0; | |
| 118 return toActiveDOMObjectFunction(object); | |
| 119 } | |
| 120 | |
| 121 EventTarget* toEventTarget(v8::Handle<v8::Object> object) const | |
| 122 { | |
| 123 if (!toEventTargetFunction) | |
| 124 return 0; | |
| 125 return toEventTargetFunction(object); | |
| 126 } | |
| 127 | |
| 128 void visitDOMWrapper(void* object, const v8::Persistent<v8::Object>& wra
pper, v8::Isolate* isolate) const | |
| 129 { | |
| 130 if (!visitDOMWrapperFunction) | |
| 131 setObjectGroup(object, wrapper, isolate); | |
| 132 else | |
| 133 visitDOMWrapperFunction(object, wrapper, isolate); | |
| 134 } | |
| 135 | |
| 136 // This field must be the first member of the struct WrapperTypeInfo. Th
is is also checked by a COMPILE_ASSERT() below. | |
| 137 const gin::GinEmbedder ginEmbedder; | |
| 138 | |
| 139 const DomTemplateFunction domTemplateFunction; | |
| 140 const DerefObjectFunction derefObjectFunction; | |
| 141 const ToActiveDOMObjectFunction toActiveDOMObjectFunction; | |
| 142 const ToEventTargetFunction toEventTargetFunction; | |
| 143 const ResolveWrapperReachabilityFunction visitDOMWrapperFunction; | |
| 144 const InstallPerContextEnabledPrototypePropertiesFunction installPerCont
extEnabledMethodsFunction; | |
| 145 const WrapperTypeInfo* parentClass; | |
| 146 const WrapperTypePrototype wrapperTypePrototype; | |
| 147 const GCType gcType; | |
| 148 }; | |
| 149 | |
| 150 | |
| 151 COMPILE_ASSERT(offsetof(struct WrapperTypeInfo, ginEmbedder) == offsetof(str
uct gin::WrapperInfo, embedder), wrapper_type_info_compatible_to_gin); | |
| 152 | |
| 153 template<typename T, int offset> | |
| 154 inline T* getInternalField(const v8::Persistent<v8::Object>& persistent) | |
| 155 { | |
| 156 // This would be unsafe, but InternalFieldCount and GetAlignedPointerFro
mInternalField are guaranteed not to allocate | |
| 157 const v8::Handle<v8::Object>& object = reinterpret_cast<const v8::Handle
<v8::Object>&>(persistent); | |
| 158 ASSERT(offset < object->InternalFieldCount()); | |
| 159 return static_cast<T*>(object->GetAlignedPointerFromInternalField(offset
)); | |
| 160 } | |
| 161 | |
| 162 template<typename T, int offset> | |
| 163 inline T* getInternalField(v8::Handle<v8::Object> wrapper) | |
| 164 { | |
| 165 ASSERT(offset < wrapper->InternalFieldCount()); | |
| 166 return static_cast<T*>(wrapper->GetAlignedPointerFromInternalField(offse
t)); | |
| 167 } | |
| 168 | |
| 169 inline void* toNative(const v8::Persistent<v8::Object>& wrapper) | |
| 170 { | |
| 171 return getInternalField<void, v8DOMWrapperObjectIndex>(wrapper); | |
| 172 } | |
| 173 | |
| 174 inline void* toNative(v8::Handle<v8::Object> wrapper) | |
| 175 { | |
| 176 return getInternalField<void, v8DOMWrapperObjectIndex>(wrapper); | |
| 177 } | |
| 178 | |
| 179 inline const WrapperTypeInfo* toWrapperTypeInfo(const v8::Persistent<v8::Obj
ect>& wrapper) | |
| 180 { | |
| 181 return getInternalField<WrapperTypeInfo, v8DOMWrapperTypeIndex>(wrapper)
; | |
| 182 } | |
| 183 | |
| 184 inline const WrapperTypeInfo* toWrapperTypeInfo(v8::Handle<v8::Object> wrapp
er) | |
| 185 { | |
| 186 return getInternalField<WrapperTypeInfo, v8DOMWrapperTypeIndex>(wrapper)
; | |
| 187 } | |
| 188 | |
| 189 inline const PersistentNode* toPersistentHandle(const v8::Handle<v8::Object>
& wrapper) | |
| 190 { | |
| 191 // Persistent handle is stored in the last internal field. | |
| 192 return static_cast<PersistentNode*>(wrapper->GetAlignedPointerFromIntern
alField(wrapper->InternalFieldCount() - 1)); | |
| 193 } | |
| 194 | |
| 195 inline void releaseObject(v8::Handle<v8::Object> wrapper) | |
| 196 { | |
| 197 const WrapperTypeInfo* typeInfo = toWrapperTypeInfo(wrapper); | |
| 198 if (typeInfo->gcType == GarbageCollectedObject) { | |
| 199 const PersistentNode* handle = toPersistentHandle(wrapper); | |
| 200 // This will be null iff a wrapper for a hidden wrapper object, | |
| 201 // see V8DOMWrapper::setNativeInfoForHiddenWrapper(). | |
| 202 delete handle; | |
| 203 } else if (typeInfo->gcType == WillBeGarbageCollectedObject) { | |
| 204 #if ENABLE(OILPAN) | |
| 205 const PersistentNode* handle = toPersistentHandle(wrapper); | |
| 206 // This will be null iff a wrapper for a hidden wrapper object, | |
| 207 // see V8DOMWrapper::setNativeInfoForHiddenWrapper(). | |
| 208 delete handle; | |
| 209 #else | |
| 210 ASSERT(typeInfo->derefObjectFunction); | |
| 211 typeInfo->derefObjectFunction(toNative(wrapper)); | |
| 212 #endif | |
| 213 } else { | |
| 214 ASSERT(typeInfo->derefObjectFunction); | |
| 215 typeInfo->derefObjectFunction(toNative(wrapper)); | |
| 216 } | |
| 217 } | |
| 218 | |
| 219 struct WrapperConfiguration { | |
| 220 | |
| 221 enum Lifetime { | |
| 222 Dependent, Independent | |
| 223 }; | |
| 224 | |
| 225 void configureWrapper(v8::PersistentBase<v8::Object>* wrapper) const | |
| 226 { | |
| 227 wrapper->SetWrapperClassId(classId); | |
| 228 if (lifetime == Independent) | |
| 229 wrapper->MarkIndependent(); | |
| 230 } | |
| 231 | |
| 232 const uint16_t classId; | |
| 233 const Lifetime lifetime; | |
| 234 }; | |
| 235 | |
| 236 inline WrapperConfiguration buildWrapperConfiguration(void*, WrapperConfigur
ation::Lifetime lifetime) | |
| 237 { | |
| 238 WrapperConfiguration configuration = {v8DOMObjectClassId, lifetime}; | |
| 239 return configuration; | |
| 240 } | |
| 241 | |
| 242 inline WrapperConfiguration buildWrapperConfiguration(Node*, WrapperConfigur
ation::Lifetime lifetime) | |
| 243 { | |
| 244 WrapperConfiguration configuration = {v8DOMNodeClassId, lifetime}; | |
| 245 return configuration; | |
| 246 } | |
| 247 } | |
| 248 | |
| 249 #endif // WrapperTypeInfo_h | |
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Chromium Code Reviews
Issue 351423002:
Moved files under Source/bindings/v8 to Source/bindings/core/v8. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk