mirror of
https://github.com/flutter/flutter.git
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226 lines
11 KiB
C++
226 lines
11 KiB
C++
/*
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* Copyright (C) 2009 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef V8DOMWrapper_h
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#define V8DOMWrapper_h
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#include "bindings/core/v8/DOMDataStore.h"
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#include "bindings/core/v8/ScriptWrappable.h"
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#include "wtf/PassRefPtr.h"
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#include "wtf/RawPtr.h"
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#include "wtf/text/AtomicString.h"
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#include <v8.h>
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namespace blink {
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class Node;
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struct WrapperTypeInfo;
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class V8DOMWrapper {
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public:
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static v8::Local<v8::Object> createWrapper(v8::Handle<v8::Object> creationContext, const WrapperTypeInfo*, ScriptWrappableBase* internalPointer, v8::Isolate*);
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template<typename V8T, typename T>
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static v8::Handle<v8::Object> associateObjectWithWrapper(PassRefPtr<T>, const WrapperTypeInfo*, v8::Handle<v8::Object>, v8::Isolate*);
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template<typename V8T, typename T>
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static v8::Handle<v8::Object> associateObjectWithWrapper(RawPtr<T> object, const WrapperTypeInfo* wrapperTypeInfo, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate)
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{
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return associateObjectWithWrapper<V8T, T>(object.get(), wrapperTypeInfo, wrapper, isolate);
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}
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template<typename V8T, typename T>
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static v8::Handle<v8::Object> associateObjectWithWrapper(T*, const WrapperTypeInfo*, v8::Handle<v8::Object>, v8::Isolate*);
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static v8::Handle<v8::Object> associateObjectWithWrapperNonTemplate(ScriptWrappable*, const WrapperTypeInfo*, v8::Handle<v8::Object>, v8::Isolate*);
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static v8::Handle<v8::Object> associateObjectWithWrapperNonTemplate(Node*, const WrapperTypeInfo*, v8::Handle<v8::Object>, v8::Isolate*);
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static void setNativeInfo(v8::Handle<v8::Object>, const WrapperTypeInfo*, ScriptWrappableBase* internalPointer);
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static void setNativeInfoForHiddenWrapper(v8::Handle<v8::Object>, const WrapperTypeInfo*, ScriptWrappableBase* internalPointer);
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static void setNativeInfoWithPersistentHandle(v8::Handle<v8::Object>, const WrapperTypeInfo*, ScriptWrappableBase* internalPointer, WrapperPersistentNode*);
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static void clearNativeInfo(v8::Handle<v8::Object>, const WrapperTypeInfo*);
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static bool isDOMWrapper(v8::Handle<v8::Value>);
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};
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inline void V8DOMWrapper::setNativeInfo(v8::Handle<v8::Object> wrapper, const WrapperTypeInfo* wrapperTypeInfo, ScriptWrappableBase* internalPointer)
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{
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ASSERT(wrapper->InternalFieldCount() >= 2);
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ASSERT(internalPointer);
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ASSERT(wrapperTypeInfo);
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#if ENABLE(OILPAN)
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ASSERT(wrapperTypeInfo->gcType == WrapperTypeInfo::RefCountedObject);
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#else
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ASSERT(wrapperTypeInfo->gcType == WrapperTypeInfo::RefCountedObject || wrapperTypeInfo->gcType == WrapperTypeInfo::WillBeGarbageCollectedObject);
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#endif
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wrapper->SetAlignedPointerInInternalField(v8DOMWrapperObjectIndex, internalPointer);
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wrapper->SetAlignedPointerInInternalField(v8DOMWrapperTypeIndex, const_cast<WrapperTypeInfo*>(wrapperTypeInfo));
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}
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inline void V8DOMWrapper::setNativeInfoForHiddenWrapper(v8::Handle<v8::Object> wrapper, const WrapperTypeInfo* wrapperTypeInfo, ScriptWrappableBase* internalPointer)
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{
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// see WindowProxy::installDOMWindow() comment for why this version is needed and safe.
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ASSERT(wrapper->InternalFieldCount() >= 2);
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ASSERT(internalPointer);
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ASSERT(wrapperTypeInfo);
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#if ENABLE(OILPAN)
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ASSERT(wrapperTypeInfo->gcType != WrapperTypeInfo::RefCountedObject);
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#else
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ASSERT(wrapperTypeInfo->gcType == WrapperTypeInfo::RefCountedObject || wrapperTypeInfo->gcType == WrapperTypeInfo::WillBeGarbageCollectedObject);
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#endif
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// Clear out the last internal field, which is assumed to contain a valid persistent pointer value.
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if (wrapperTypeInfo->gcType == WrapperTypeInfo::GarbageCollectedObject) {
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wrapper->SetAlignedPointerInInternalField(wrapper->InternalFieldCount() - 1, 0);
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} else if (wrapperTypeInfo->gcType == WrapperTypeInfo::WillBeGarbageCollectedObject) {
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#if ENABLE(OILPAN)
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wrapper->SetAlignedPointerInInternalField(wrapper->InternalFieldCount() - 1, 0);
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#endif
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}
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wrapper->SetAlignedPointerInInternalField(v8DOMWrapperObjectIndex, internalPointer);
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wrapper->SetAlignedPointerInInternalField(v8DOMWrapperTypeIndex, const_cast<WrapperTypeInfo*>(wrapperTypeInfo));
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}
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inline void V8DOMWrapper::setNativeInfoWithPersistentHandle(v8::Handle<v8::Object> wrapper, const WrapperTypeInfo* wrapperTypeInfo, ScriptWrappableBase* internalPointer, WrapperPersistentNode* handle)
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{
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ASSERT(wrapper->InternalFieldCount() >= 3);
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ASSERT(internalPointer);
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ASSERT(wrapperTypeInfo);
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#if ENABLE(OILPAN)
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ASSERT(wrapperTypeInfo->gcType == WrapperTypeInfo::WillBeGarbageCollectedObject || wrapperTypeInfo->gcType == WrapperTypeInfo::GarbageCollectedObject);
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#else
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ASSERT(wrapperTypeInfo->gcType == WrapperTypeInfo::GarbageCollectedObject);
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#endif
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wrapper->SetAlignedPointerInInternalField(v8DOMWrapperObjectIndex, internalPointer);
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wrapper->SetAlignedPointerInInternalField(v8DOMWrapperTypeIndex, const_cast<WrapperTypeInfo*>(wrapperTypeInfo));
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// Persistent handle is stored in the last internal field.
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wrapper->SetAlignedPointerInInternalField(wrapper->InternalFieldCount() - 1, handle);
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}
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inline void V8DOMWrapper::clearNativeInfo(v8::Handle<v8::Object> wrapper, const WrapperTypeInfo* wrapperTypeInfo)
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{
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ASSERT(wrapper->InternalFieldCount() >= 2);
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ASSERT(wrapperTypeInfo);
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// clearNativeInfo() is used only by NP objects, which are not garbage collected.
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ASSERT(wrapperTypeInfo->gcType == WrapperTypeInfo::RefCountedObject);
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wrapper->SetAlignedPointerInInternalField(v8DOMWrapperTypeIndex, const_cast<WrapperTypeInfo*>(wrapperTypeInfo));
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wrapper->SetAlignedPointerInInternalField(v8DOMWrapperObjectIndex, 0);
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}
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template<typename V8T, typename T>
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inline v8::Handle<v8::Object> V8DOMWrapper::associateObjectWithWrapper(PassRefPtr<T> object, const WrapperTypeInfo* wrapperTypeInfo, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate)
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{
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setNativeInfo(wrapper, wrapperTypeInfo, V8T::toScriptWrappableBase(object.get()));
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ASSERT(isDOMWrapper(wrapper));
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DOMDataStore::setWrapper<V8T>(object.leakRef(), wrapper, isolate, wrapperTypeInfo);
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return wrapper;
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}
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template<typename V8T, typename T>
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inline v8::Handle<v8::Object> V8DOMWrapper::associateObjectWithWrapper(T* object, const WrapperTypeInfo* wrapperTypeInfo, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate)
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{
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setNativeInfoWithPersistentHandle(wrapper, wrapperTypeInfo, V8T::toScriptWrappableBase(object), new WrapperPersistent<T>(object));
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ASSERT(isDOMWrapper(wrapper));
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DOMDataStore::setWrapper<V8T>(object, wrapper, isolate, wrapperTypeInfo);
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return wrapper;
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}
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inline v8::Handle<v8::Object> V8DOMWrapper::associateObjectWithWrapperNonTemplate(ScriptWrappable* impl, const WrapperTypeInfo* wrapperTypeInfo, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate)
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{
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wrapperTypeInfo->refObject(impl->toScriptWrappableBase());
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#if ENABLE(OILPAN)
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if (wrapperTypeInfo->gcType == WrapperTypeInfo::RefCountedObject)
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setNativeInfo(wrapper, wrapperTypeInfo, impl->toScriptWrappableBase());
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else
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setNativeInfoWithPersistentHandle(wrapper, wrapperTypeInfo, impl->toScriptWrappableBase(), wrapperTypeInfo->createPersistentHandle(impl));
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#else
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if (wrapperTypeInfo->gcType != WrapperTypeInfo::GarbageCollectedObject)
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setNativeInfo(wrapper, wrapperTypeInfo, impl->toScriptWrappableBase());
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else
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setNativeInfoWithPersistentHandle(wrapper, wrapperTypeInfo, impl->toScriptWrappableBase(), wrapperTypeInfo->createPersistentHandle(impl));
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#endif
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ASSERT(isDOMWrapper(wrapper));
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DOMDataStore::setWrapperNonTemplate(impl, wrapper, isolate, wrapperTypeInfo);
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return wrapper;
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}
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inline v8::Handle<v8::Object> V8DOMWrapper::associateObjectWithWrapperNonTemplate(Node* node, const WrapperTypeInfo* wrapperTypeInfo, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate)
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{
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wrapperTypeInfo->refObject(ScriptWrappable::fromObject(node)->toScriptWrappableBase());
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#if ENABLE(OILPAN)
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if (wrapperTypeInfo->gcType == WrapperTypeInfo::RefCountedObject)
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setNativeInfo(wrapper, wrapperTypeInfo, ScriptWrappable::fromObject(node)->toScriptWrappableBase());
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else
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setNativeInfoWithPersistentHandle(wrapper, wrapperTypeInfo, ScriptWrappable::fromObject(node)->toScriptWrappableBase(), wrapperTypeInfo->createPersistentHandle(ScriptWrappable::fromObject(node)));
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#else
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if (wrapperTypeInfo->gcType != WrapperTypeInfo::GarbageCollectedObject)
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setNativeInfo(wrapper, wrapperTypeInfo, ScriptWrappable::fromObject(node)->toScriptWrappableBase());
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else
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setNativeInfoWithPersistentHandle(wrapper, wrapperTypeInfo, ScriptWrappable::fromObject(node)->toScriptWrappableBase(), wrapperTypeInfo->createPersistentHandle(ScriptWrappable::fromObject(node)));
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#endif
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ASSERT(isDOMWrapper(wrapper));
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DOMDataStore::setWrapperNonTemplate(node, wrapper, isolate, wrapperTypeInfo);
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return wrapper;
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}
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class V8WrapperInstantiationScope {
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public:
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V8WrapperInstantiationScope(v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
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: m_didEnterContext(false)
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, m_context(isolate->GetCurrentContext())
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{
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// creationContext should not be empty. Because if we have an
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// empty creationContext, we will end up creating
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// a new object in the context currently entered. This is wrong.
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RELEASE_ASSERT(!creationContext.IsEmpty());
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v8::Handle<v8::Context> contextForWrapper = creationContext->CreationContext();
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// For performance, we enter the context only if the currently running context
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// is different from the context that we are about to enter.
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if (contextForWrapper == m_context)
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return;
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m_context = v8::Local<v8::Context>::New(isolate, contextForWrapper);
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m_didEnterContext = true;
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m_context->Enter();
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}
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~V8WrapperInstantiationScope()
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{
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if (!m_didEnterContext)
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return;
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m_context->Exit();
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}
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v8::Handle<v8::Context> context() const { return m_context; }
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private:
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bool m_didEnterContext;
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v8::Handle<v8::Context> m_context;
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};
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} // namespace blink
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#endif // V8DOMWrapper_h
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