| /* |
| * Copyright (C) 2009 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef V8DOMWrapper_h |
| #define V8DOMWrapper_h |
| |
| #include "bindings/core/v8/DOMDataStore.h" |
| #include "bindings/core/v8/ScriptWrappable.h" |
| #include "wtf/PassRefPtr.h" |
| #include "wtf/RawPtr.h" |
| #include "wtf/text/AtomicString.h" |
| #include <v8.h> |
| |
| namespace blink { |
| |
| class Node; |
| struct WrapperTypeInfo; |
| |
| class V8DOMWrapper { |
| public: |
| static v8::Local<v8::Object> createWrapper(v8::Handle<v8::Object> creationContext, const WrapperTypeInfo*, ScriptWrappableBase*, v8::Isolate*); |
| |
| template<typename V8T, typename T> |
| static v8::Handle<v8::Object> associateObjectWithWrapper(PassRefPtr<T>, const WrapperTypeInfo*, v8::Handle<v8::Object>, v8::Isolate*); |
| template<typename V8T, typename T> |
| static v8::Handle<v8::Object> associateObjectWithWrapper(RawPtr<T> object, const WrapperTypeInfo* wrapperTypeInfo, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate) |
| { |
| return associateObjectWithWrapper<V8T, T>(object.get(), wrapperTypeInfo, wrapper, isolate); |
| } |
| template<typename V8T, typename T> |
| static v8::Handle<v8::Object> associateObjectWithWrapper(T*, const WrapperTypeInfo*, v8::Handle<v8::Object>, v8::Isolate*); |
| static v8::Handle<v8::Object> associateObjectWithWrapperNonTemplate(ScriptWrappable*, const WrapperTypeInfo*, v8::Handle<v8::Object>, v8::Isolate*); |
| static v8::Handle<v8::Object> associateObjectWithWrapperNonTemplate(Node*, const WrapperTypeInfo*, v8::Handle<v8::Object>, v8::Isolate*); |
| static void setNativeInfo(v8::Handle<v8::Object>, const WrapperTypeInfo*, ScriptWrappableBase*); |
| static void clearNativeInfo(v8::Handle<v8::Object>, const WrapperTypeInfo*); |
| |
| static bool isDOMWrapper(v8::Handle<v8::Value>); |
| }; |
| |
| inline void V8DOMWrapper::setNativeInfo(v8::Handle<v8::Object> wrapper, const WrapperTypeInfo* wrapperTypeInfo, ScriptWrappableBase* scriptWrappableBase) |
| { |
| ASSERT(wrapper->InternalFieldCount() >= 2); |
| ASSERT(scriptWrappableBase); |
| ASSERT(wrapperTypeInfo); |
| wrapper->SetAlignedPointerInInternalField(v8DOMWrapperObjectIndex, scriptWrappableBase); |
| wrapper->SetAlignedPointerInInternalField(v8DOMWrapperTypeIndex, const_cast<WrapperTypeInfo*>(wrapperTypeInfo)); |
| } |
| |
| inline void V8DOMWrapper::clearNativeInfo(v8::Handle<v8::Object> wrapper, const WrapperTypeInfo* wrapperTypeInfo) |
| { |
| ASSERT(wrapper->InternalFieldCount() >= 2); |
| ASSERT(wrapperTypeInfo); |
| // clearNativeInfo() is used only by NP objects, which are not garbage collected. |
| ASSERT(wrapperTypeInfo->gcType == WrapperTypeInfo::RefCountedObject); |
| wrapper->SetAlignedPointerInInternalField(v8DOMWrapperTypeIndex, const_cast<WrapperTypeInfo*>(wrapperTypeInfo)); |
| wrapper->SetAlignedPointerInInternalField(v8DOMWrapperObjectIndex, 0); |
| } |
| |
| template<typename V8T, typename T> |
| inline v8::Handle<v8::Object> V8DOMWrapper::associateObjectWithWrapper(PassRefPtr<T> object, const WrapperTypeInfo* wrapperTypeInfo, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate) |
| { |
| setNativeInfo(wrapper, wrapperTypeInfo, V8T::toScriptWrappableBase(object.get())); |
| ASSERT(isDOMWrapper(wrapper)); |
| DOMDataStore::setWrapper<V8T>(object.leakRef(), wrapper, isolate, wrapperTypeInfo); |
| return wrapper; |
| } |
| |
| template<typename V8T, typename T> |
| inline v8::Handle<v8::Object> V8DOMWrapper::associateObjectWithWrapper(T* object, const WrapperTypeInfo* wrapperTypeInfo, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate) |
| { |
| setNativeInfo(wrapper, wrapperTypeInfo, V8T::toScriptWrappableBase(object)); |
| ASSERT(isDOMWrapper(wrapper)); |
| DOMDataStore::setWrapper<V8T>(object, wrapper, isolate, wrapperTypeInfo); |
| return wrapper; |
| } |
| |
| inline v8::Handle<v8::Object> V8DOMWrapper::associateObjectWithWrapperNonTemplate(ScriptWrappable* impl, const WrapperTypeInfo* wrapperTypeInfo, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate) |
| { |
| wrapperTypeInfo->refObject(impl->toScriptWrappableBase()); |
| setNativeInfo(wrapper, wrapperTypeInfo, impl->toScriptWrappableBase()); |
| ASSERT(isDOMWrapper(wrapper)); |
| DOMDataStore::setWrapperNonTemplate(impl, wrapper, isolate, wrapperTypeInfo); |
| return wrapper; |
| } |
| |
| inline v8::Handle<v8::Object> V8DOMWrapper::associateObjectWithWrapperNonTemplate(Node* node, const WrapperTypeInfo* wrapperTypeInfo, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate) |
| { |
| wrapperTypeInfo->refObject(ScriptWrappable::fromNode(node)->toScriptWrappableBase()); |
| setNativeInfo(wrapper, wrapperTypeInfo, ScriptWrappable::fromNode(node)->toScriptWrappableBase()); |
| ASSERT(isDOMWrapper(wrapper)); |
| DOMDataStore::setWrapperNonTemplate(node, wrapper, isolate, wrapperTypeInfo); |
| return wrapper; |
| } |
| |
| class V8WrapperInstantiationScope { |
| public: |
| V8WrapperInstantiationScope(v8::Handle<v8::Object> creationContext, v8::Isolate* isolate) |
| : m_didEnterContext(false) |
| , m_context(isolate->GetCurrentContext()) |
| { |
| // creationContext should not be empty. Because if we have an |
| // empty creationContext, we will end up creating |
| // a new object in the context currently entered. This is wrong. |
| RELEASE_ASSERT(!creationContext.IsEmpty()); |
| v8::Handle<v8::Context> contextForWrapper = creationContext->CreationContext(); |
| // For performance, we enter the context only if the currently running context |
| // is different from the context that we are about to enter. |
| if (contextForWrapper == m_context) |
| return; |
| m_context = v8::Local<v8::Context>::New(isolate, contextForWrapper); |
| m_didEnterContext = true; |
| m_context->Enter(); |
| } |
| |
| ~V8WrapperInstantiationScope() |
| { |
| if (!m_didEnterContext) |
| return; |
| m_context->Exit(); |
| } |
| |
| v8::Handle<v8::Context> context() const { return m_context; } |
| |
| private: |
| bool m_didEnterContext; |
| v8::Handle<v8::Context> m_context; |
| }; |
| |
| } // namespace blink |
| |
| #endif // V8DOMWrapper_h |