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

Source/bindings/core/v8/WrapperTypeInfo.h

Index: Source/bindings/core/v8/WrapperTypeInfo.h
diff --git a/Source/bindings/core/v8/WrapperTypeInfo.h b/Source/bindings/core/v8/WrapperTypeInfo.h
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+/*
+ * Copyright (C) 2010 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 WrapperTypeInfo_h
+#define WrapperTypeInfo_h
+
+#include "gin/public/wrapper_info.h"
+#include "platform/heap/Handle.h"
+#include "wtf/Assertions.h"
+#include <v8.h>
+
+namespace WebCore {
+
+class ActiveDOMObject;
+class EventTarget;
+class Node;
+
+static const int v8DOMWrapperTypeIndex = static_cast<int>(gin::kWrapperInfoIndex);
+static const int v8DOMWrapperObjectIndex = static_cast<int>(gin::kEncodedValueIndex);
+static const int v8DefaultWrapperInternalFieldCount = static_cast<int>(gin::kNumberOfInternalFields);
+static const int v8PrototypeTypeIndex = 0;
+static const int v8PrototypeInternalFieldcount = 1;
+
+static const uint16_t v8DOMNodeClassId = 1;
+static const uint16_t v8DOMObjectClassId = 2;
+
+typedef v8::Handle<v8::FunctionTemplate> (*DomTemplateFunction)(v8::Isolate*);
+typedef void (*DerefObjectFunction)(void*);
+typedef ActiveDOMObject* (*ToActiveDOMObjectFunction)(v8::Handle<v8::Object>);
+typedef EventTarget* (*ToEventTargetFunction)(v8::Handle<v8::Object>);
+typedef void (*ResolveWrapperReachabilityFunction)(void*, const v8::Persistent<v8::Object>&, v8::Isolate*);
+typedef void (*InstallPerContextEnabledPrototypePropertiesFunction)(v8::Handle<v8::Object>, v8::Isolate*);
+
+enum WrapperTypePrototype {
+    WrapperTypeObjectPrototype,
+    WrapperTypeExceptionPrototype
+};
+
+enum GCType {
+    GarbageCollectedObject,
+    WillBeGarbageCollectedObject,
+    RefCountedObject,
+};
+
+inline void setObjectGroup(void* object, const v8::Persistent<v8::Object>& wrapper, v8::Isolate* isolate)
+{
+    isolate->SetObjectGroupId(wrapper, v8::UniqueId(reinterpret_cast<intptr_t>(object)));
+}
+
+// This struct provides a way to store a bunch of information that is helpful when unwrapping
+// v8 objects. Each v8 bindings class has exactly one static WrapperTypeInfo member, so
+// comparing pointers is a safe way to determine if types match.
+struct WrapperTypeInfo {
+
+    static const WrapperTypeInfo* unwrap(v8::Handle<v8::Value> typeInfoWrapper)
+    {
+        return reinterpret_cast<const WrapperTypeInfo*>(v8::External::Cast(*typeInfoWrapper)->Value());
+    }
+
+
+    bool equals(const WrapperTypeInfo* that) const
+    {
+        return this == that;
+    }
+
+    bool isSubclass(const WrapperTypeInfo* that) const
+    {
+        for (const WrapperTypeInfo* current = this; current; current = current->parentClass) {
+            if (current == that)
+                return true;
+        }
+
+        return false;
+    }
+
+    v8::Handle<v8::FunctionTemplate> domTemplate(v8::Isolate* isolate) const
+    {
+        return domTemplateFunction(isolate);
+    }
+
+    void installPerContextEnabledMethods(v8::Handle<v8::Object> prototypeTemplate, v8::Isolate* isolate) const
+    {
+        if (installPerContextEnabledMethodsFunction)
+            installPerContextEnabledMethodsFunction(prototypeTemplate, isolate);
+    }
+
+    ActiveDOMObject* toActiveDOMObject(v8::Handle<v8::Object> object) const
+    {
+        if (!toActiveDOMObjectFunction)
+            return 0;
+        return toActiveDOMObjectFunction(object);
+    }
+
+    EventTarget* toEventTarget(v8::Handle<v8::Object> object) const
+    {
+        if (!toEventTargetFunction)
+            return 0;
+        return toEventTargetFunction(object);
+    }
+
+    void visitDOMWrapper(void* object, const v8::Persistent<v8::Object>& wrapper, v8::Isolate* isolate) const
+    {
+        if (!visitDOMWrapperFunction)
+            setObjectGroup(object, wrapper, isolate);
+        else
+            visitDOMWrapperFunction(object, wrapper, isolate);
+    }
+
+    // This field must be the first member of the struct WrapperTypeInfo. This is also checked by a COMPILE_ASSERT() below.
+    const gin::GinEmbedder ginEmbedder;
+
+    const DomTemplateFunction domTemplateFunction;
+    const DerefObjectFunction derefObjectFunction;
+    const ToActiveDOMObjectFunction toActiveDOMObjectFunction;
+    const ToEventTargetFunction toEventTargetFunction;
+    const ResolveWrapperReachabilityFunction visitDOMWrapperFunction;
+    const InstallPerContextEnabledPrototypePropertiesFunction installPerContextEnabledMethodsFunction;
+    const WrapperTypeInfo* parentClass;
+    const WrapperTypePrototype wrapperTypePrototype;
+    const GCType gcType;
+};
+
+
+COMPILE_ASSERT(offsetof(struct WrapperTypeInfo, ginEmbedder) == offsetof(struct gin::WrapperInfo, embedder), wrapper_type_info_compatible_to_gin);
+
+template<typename T, int offset>
+inline T* getInternalField(const v8::Persistent<v8::Object>& persistent)
+{
+    // This would be unsafe, but InternalFieldCount and GetAlignedPointerFromInternalField are guaranteed not to allocate
+    const v8::Handle<v8::Object>& object = reinterpret_cast<const v8::Handle<v8::Object>&>(persistent);
+    ASSERT(offset < object->InternalFieldCount());
+    return static_cast<T*>(object->GetAlignedPointerFromInternalField(offset));
+}
+
+template<typename T, int offset>
+inline T* getInternalField(v8::Handle<v8::Object> wrapper)
+{
+    ASSERT(offset < wrapper->InternalFieldCount());
+    return static_cast<T*>(wrapper->GetAlignedPointerFromInternalField(offset));
+}
+
+inline void* toNative(const v8::Persistent<v8::Object>& wrapper)
+{
+    return getInternalField<void, v8DOMWrapperObjectIndex>(wrapper);
+}
+
+inline void* toNative(v8::Handle<v8::Object> wrapper)
+{
+    return getInternalField<void, v8DOMWrapperObjectIndex>(wrapper);
+}
+
+inline const WrapperTypeInfo* toWrapperTypeInfo(const v8::Persistent<v8::Object>& wrapper)
+{
+    return getInternalField<WrapperTypeInfo, v8DOMWrapperTypeIndex>(wrapper);
+}
+
+inline const WrapperTypeInfo* toWrapperTypeInfo(v8::Handle<v8::Object> wrapper)
+{
+    return getInternalField<WrapperTypeInfo, v8DOMWrapperTypeIndex>(wrapper);
+}
+
+inline const PersistentNode* toPersistentHandle(const v8::Handle<v8::Object>& wrapper)
+{
+    // Persistent handle is stored in the last internal field.
+    return static_cast<PersistentNode*>(wrapper->GetAlignedPointerFromInternalField(wrapper->InternalFieldCount() - 1));
+}
+
+inline void releaseObject(v8::Handle<v8::Object> wrapper)
+{
+    const WrapperTypeInfo* typeInfo = toWrapperTypeInfo(wrapper);
+    if (typeInfo->gcType == GarbageCollectedObject) {
+        const PersistentNode* handle = toPersistentHandle(wrapper);
+        // This will be null iff a wrapper for a hidden wrapper object,
+        // see V8DOMWrapper::setNativeInfoForHiddenWrapper().
+        delete handle;
+    } else if (typeInfo->gcType == WillBeGarbageCollectedObject) {
+#if ENABLE(OILPAN)
+        const PersistentNode* handle = toPersistentHandle(wrapper);
+        // This will be null iff a wrapper for a hidden wrapper object,
+        // see V8DOMWrapper::setNativeInfoForHiddenWrapper().
+        delete handle;
+#else
+        ASSERT(typeInfo->derefObjectFunction);
+        typeInfo->derefObjectFunction(toNative(wrapper));
+#endif
+    } else {
+        ASSERT(typeInfo->derefObjectFunction);
+        typeInfo->derefObjectFunction(toNative(wrapper));
+    }
+}
+
+struct WrapperConfiguration {
+
+    enum Lifetime {
+        Dependent, Independent
+    };
+
+    void configureWrapper(v8::PersistentBase<v8::Object>* wrapper) const
+    {
+        wrapper->SetWrapperClassId(classId);
+        if (lifetime == Independent)
+            wrapper->MarkIndependent();
+    }
+
+    const uint16_t classId;
+    const Lifetime lifetime;
+};
+
+inline WrapperConfiguration buildWrapperConfiguration(void*, WrapperConfiguration::Lifetime lifetime)
+{
+    WrapperConfiguration configuration = {v8DOMObjectClassId, lifetime};
+    return configuration;
+}
+
+inline WrapperConfiguration buildWrapperConfiguration(Node*, WrapperConfiguration::Lifetime lifetime)
+{
+    WrapperConfiguration configuration = {v8DOMNodeClassId, lifetime};
+    return configuration;
+}
+
+} // namespace WebCore
+
+#endif // WrapperTypeInfo_h