Moved files under Source/bindings/v8 to Source/bindings/core/v8.

Source/bindings/core/v8/V8DOMWrapper.h

+/*
+ * 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 "wtf/PassRefPtr.h"
+#include "wtf/RawPtr.h"
+#include "wtf/text/AtomicString.h"
+#include <v8.h>
+
+namespace WebCore {
+
+struct WrapperTypeInfo;
+
+class V8DOMWrapper {
+public:
+    static v8::Local<v8::Object> createWrapper(v8::Handle<v8::Object> creationContext, const WrapperTypeInfo*, void*, v8::Isolate*);
+
+    template<typename V8T, typename T>
+    static inline v8::Handle<v8::Object> associateObjectWithWrapper(PassRefPtr<T>, const WrapperTypeInfo*, v8::Handle<v8::Object>, v8::Isolate*, WrapperConfiguration::Lifetime);
+    template<typename V8T, typename T>
+    static inline v8::Handle<v8::Object> associateObjectWithWrapper(RawPtr<T> object, const WrapperTypeInfo* wrapperTypeInfo, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate, WrapperConfiguration::Lifetime lifetime)
+    {
+        return associateObjectWithWrapper<V8T, T>(object.get(), wrapperTypeInfo, wrapper, isolate, lifetime);
+    }
+    template<typename V8T, typename T>
+    static inline v8::Handle<v8::Object> associateObjectWithWrapper(T*, const WrapperTypeInfo*, v8::Handle<v8::Object>, v8::Isolate*, WrapperConfiguration::Lifetime);
+    static inline void setNativeInfo(v8::Handle<v8::Object>, const WrapperTypeInfo*, void*);
+    static inline void setNativeInfoForHiddenWrapper(v8::Handle<v8::Object>, const WrapperTypeInfo*, void*);
+    static inline void setNativeInfoWithPersistentHandle(v8::Handle<v8::Object>, const WrapperTypeInfo*, void*, PersistentNode*);
+    static inline 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, void* object)
+{
+    ASSERT(wrapper->InternalFieldCount() >= 2);
+    ASSERT(object);
+    ASSERT(wrapperTypeInfo);
+#if ENABLE(OILPAN)
+    ASSERT(wrapperTypeInfo->gcType == RefCountedObject);
+#else
+    ASSERT(wrapperTypeInfo->gcType == RefCountedObject || wrapperTypeInfo->gcType == WillBeGarbageCollectedObject);
+#endif
+    wrapper->SetAlignedPointerInInternalField(v8DOMWrapperObjectIndex, object);
+    wrapper->SetAlignedPointerInInternalField(v8DOMWrapperTypeIndex, const_cast<WrapperTypeInfo*>(wrapperTypeInfo));
+}
+
+inline void V8DOMWrapper::setNativeInfoForHiddenWrapper(v8::Handle<v8::Object> wrapper, const WrapperTypeInfo* wrapperTypeInfo, void* object)
+{
+    // see V8WindowShell::installDOMWindow() comment for why this version is needed and safe.
+    ASSERT(wrapper->InternalFieldCount() >= 2);
+    ASSERT(object);
+    ASSERT(wrapperTypeInfo);
+#if ENABLE(OILPAN)
+    ASSERT(wrapperTypeInfo->gcType != RefCountedObject);
+#else
+    ASSERT(wrapperTypeInfo->gcType == RefCountedObject || wrapperTypeInfo->gcType == WillBeGarbageCollectedObject);
+#endif
+
+    // Clear out the last internal field, which is assumed to contain a valid persistent pointer value.
+    if (wrapperTypeInfo->gcType == GarbageCollectedObject) {
+        wrapper->SetAlignedPointerInInternalField(wrapper->InternalFieldCount() - 1, 0);
+    } else if (wrapperTypeInfo->gcType == WillBeGarbageCollectedObject) {
+#if ENABLE(OILPAN)
+        wrapper->SetAlignedPointerInInternalField(wrapper->InternalFieldCount() - 1, 0);
+#endif
+    }
+    wrapper->SetAlignedPointerInInternalField(v8DOMWrapperObjectIndex, object);
+    wrapper->SetAlignedPointerInInternalField(v8DOMWrapperTypeIndex, const_cast<WrapperTypeInfo*>(wrapperTypeInfo));
+}
+
+inline void V8DOMWrapper::setNativeInfoWithPersistentHandle(v8::Handle<v8::Object> wrapper, const WrapperTypeInfo* wrapperTypeInfo, void* object, PersistentNode* handle)
+{
+    ASSERT(wrapper->InternalFieldCount() >= 3);
+    ASSERT(object);
+    ASSERT(wrapperTypeInfo);
+    ASSERT(wrapperTypeInfo->gcType != RefCountedObject);
+    wrapper->SetAlignedPointerInInternalField(v8DOMWrapperObjectIndex, object);
+    wrapper->SetAlignedPointerInInternalField(v8DOMWrapperTypeIndex, const_cast<WrapperTypeInfo*>(wrapperTypeInfo));
+    // Persistent handle is stored in the last internal field.
+    wrapper->SetAlignedPointerInInternalField(wrapper->InternalFieldCount() - 1, handle);
+}
+
+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 == 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, WrapperConfiguration::Lifetime lifetime)
+{
+    setNativeInfo(wrapper, wrapperTypeInfo, V8T::toInternalPointer(object.get()));
+    ASSERT(isDOMWrapper(wrapper));
+    WrapperConfiguration configuration = buildWrapperConfiguration(object.get(), lifetime);
+    DOMDataStore::setWrapper<V8T>(object.leakRef(), wrapper, isolate, configuration);
+    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, WrapperConfiguration::Lifetime lifetime)
+{
+    setNativeInfoWithPersistentHandle(wrapper, wrapperTypeInfo, V8T::toInternalPointer(object), new Persistent<T>(object));
+    ASSERT(isDOMWrapper(wrapper));
+    WrapperConfiguration configuration = buildWrapperConfiguration(object, lifetime);
+    DOMDataStore::setWrapper<V8T>(object, wrapper, isolate, configuration);
+    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 WebCore
+
+#endif // V8DOMWrapper_h