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

Source/bindings/v8/DOMDataStore.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 DOMDataStore_h
-#define DOMDataStore_h
-
-#include "bindings/v8/DOMWrapperMap.h"
-#include "bindings/v8/DOMWrapperWorld.h"
-#include "bindings/v8/ScriptWrappable.h"
-#include "bindings/v8/WrapperTypeInfo.h"
-#include <v8.h>
-#include "wtf/Noncopyable.h"
-#include "wtf/StdLibExtras.h"
-
-namespace WebCore {
-
-class Node;
-
-class DOMDataStore {
-    WTF_MAKE_NONCOPYABLE(DOMDataStore);
-public:
-    explicit DOMDataStore(bool isMainWorld);
-    ~DOMDataStore();
-
-    static DOMDataStore& current(v8::Isolate*);
-
-    // We can use a wrapper stored in a ScriptWrappable when we're in the main world.
-    // This method does the fast check if we're in the main world. If this method returns true,
-    // it is guaranteed that we're in the main world. On the other hand, if this method returns
-    // false, nothing is guaranteed (we might be in the main world).
-    template<typename T>
-    static bool canUseScriptWrappable(T* object)
-    {
-        return !DOMWrapperWorld::isolatedWorldsExist()
-            && !canExistInWorker(object)
-            && ScriptWrappable::wrapperCanBeStoredInObject(object);
-    }
-
-    template<typename V8T, typename T, typename Wrappable>
-    static bool setReturnValueFromWrapperFast(v8::ReturnValue<v8::Value> returnValue, T* object, v8::Local<v8::Object> holder, Wrappable* wrappable)
-    {
-        if (canUseScriptWrappable(object)) {
-            ScriptWrappable::assertWrapperSanity<V8T, T>(object, object);
-            return ScriptWrappable::fromObject(object)->setReturnValue(returnValue);
-        }
-        // The second fastest way to check if we're in the main world is to check if
-        // the wrappable's wrapper is the same as the holder.
-        // FIXME: Investigate if it's worth having this check for performance.
-        if (holderContainsWrapper(holder, wrappable)) {
-            if (ScriptWrappable::wrapperCanBeStoredInObject(object)) {
-                ScriptWrappable::assertWrapperSanity<V8T, T>(object, object);
-                return ScriptWrappable::fromObject(object)->setReturnValue(returnValue);
-            }
-            return DOMWrapperWorld::mainWorld().domDataStore().m_wrapperMap.setReturnValueFrom(returnValue, V8T::toInternalPointer(object));
-        }
-        return current(returnValue.GetIsolate()).template setReturnValueFrom<V8T>(returnValue, object);
-    }
-
-    template<typename V8T, typename T>
-    static bool setReturnValueFromWrapper(v8::ReturnValue<v8::Value> returnValue, T* object)
-    {
-        if (canUseScriptWrappable(object)) {
-            ScriptWrappable::assertWrapperSanity<V8T, T>(object, object);
-            return ScriptWrappable::fromObject(object)->setReturnValue(returnValue);
-        }
-        return current(returnValue.GetIsolate()).template setReturnValueFrom<V8T>(returnValue, object);
-    }
-
-    template<typename V8T, typename T>
-    static bool setReturnValueFromWrapperForMainWorld(v8::ReturnValue<v8::Value> returnValue, T* object)
-    {
-        if (ScriptWrappable::wrapperCanBeStoredInObject(object))
-            return ScriptWrappable::fromObject(object)->setReturnValue(returnValue);
-        return DOMWrapperWorld::mainWorld().domDataStore().m_wrapperMap.setReturnValueFrom(returnValue, V8T::toInternalPointer(object));
-    }
-
-    template<typename V8T, typename T>
-    static v8::Handle<v8::Object> getWrapper(T* object, v8::Isolate* isolate)
-    {
-        if (canUseScriptWrappable(object)) {
-            v8::Handle<v8::Object> result = ScriptWrappable::fromObject(object)->newLocalWrapper(isolate);
-            // Security: always guard against malicious tampering.
-            ScriptWrappable::assertWrapperSanity<V8T, T>(result, object);
-            return result;
-        }
-        return current(isolate).template get<V8T>(object, isolate);
-    }
-
-    template<typename V8T, typename T>
-    static void setWrapperReference(const v8::Persistent<v8::Object>& parent, T* child, v8::Isolate* isolate)
-    {
-        if (canUseScriptWrappable(child)) {
-            ScriptWrappable::assertWrapperSanity<V8T, T>(child, child);
-            ScriptWrappable::fromObject(child)->setReference(parent, isolate);
-            return;
-        }
-        current(isolate).template setReference<V8T>(parent, child, isolate);
-    }
-
-    template<typename V8T, typename T>
-    static void setWrapper(T* object, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate, const WrapperConfiguration& configuration)
-    {
-        if (canUseScriptWrappable(object)) {
-            ScriptWrappable::fromObject(object)->setWrapper(wrapper, isolate, configuration);
-            return;
-        }
-        return current(isolate).template set<V8T>(object, wrapper, isolate, configuration);
-    }
-
-    template<typename V8T, typename T>
-    static bool containsWrapper(T* object, v8::Isolate* isolate)
-    {
-        return current(isolate).template containsWrapper<V8T>(object);
-    }
-
-    template<typename V8T, typename T>
-    inline v8::Handle<v8::Object> get(T* object, v8::Isolate* isolate)
-    {
-        if (ScriptWrappable::wrapperCanBeStoredInObject(object) && m_isMainWorld)
-            return ScriptWrappable::fromObject(object)->newLocalWrapper(isolate);
-        return m_wrapperMap.newLocal(V8T::toInternalPointer(object), isolate);
-    }
-
-    template<typename V8T, typename T>
-    inline void setReference(const v8::Persistent<v8::Object>& parent, T* child, v8::Isolate* isolate)
-    {
-        if (ScriptWrappable::wrapperCanBeStoredInObject(child) && m_isMainWorld) {
-            ScriptWrappable::fromObject(child)->setReference(parent, isolate);
-            return;
-        }
-        m_wrapperMap.setReference(parent, V8T::toInternalPointer(child), isolate);
-    }
-
-    template<typename V8T, typename T>
-    inline bool setReturnValueFrom(v8::ReturnValue<v8::Value> returnValue, T* object)
-    {
-        if (ScriptWrappable::wrapperCanBeStoredInObject(object) && m_isMainWorld)
-            return ScriptWrappable::fromObject(object)->setReturnValue(returnValue);
-        return m_wrapperMap.setReturnValueFrom(returnValue, V8T::toInternalPointer(object));
-    }
-
-    template<typename V8T, typename T>
-    inline bool containsWrapper(T* object)
-    {
-        if (ScriptWrappable::wrapperCanBeStoredInObject(object) && m_isMainWorld)
-            return ScriptWrappable::fromObject(object)->containsWrapper();
-        return m_wrapperMap.containsKey(V8T::toInternalPointer(object));
-    }
-
-private:
-    template<typename V8T, typename T>
-    inline void set(T* object, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate, const WrapperConfiguration& configuration)
-    {
-        ASSERT(!!object);
-        ASSERT(!wrapper.IsEmpty());
-        if (ScriptWrappable::wrapperCanBeStoredInObject(object) && m_isMainWorld) {
-            ScriptWrappable::fromObject(object)->setWrapper(wrapper, isolate, configuration);
-            return;
-        }
-        m_wrapperMap.set(V8T::toInternalPointer(object), wrapper, configuration);
-    }
-
-    static bool canExistInWorker(void*) { return true; }
-    static bool canExistInWorker(Node*) { return false; }
-
-    static bool holderContainsWrapper(v8::Local<v8::Object>, void*)
-    {
-        return false;
-    }
-
-    static bool holderContainsWrapper(v8::Local<v8::Object> holder, ScriptWrappable* wrappable)
-    {
-        // Verify our assumptions about the main world.
-        ASSERT(wrappable);
-        ASSERT(!wrappable->containsWrapper() || !wrappable->isEqualTo(holder) || current(v8::Isolate::GetCurrent()).m_isMainWorld);
-        return wrappable->isEqualTo(holder);
-    }
-
-    bool m_isMainWorld;
-    DOMWrapperMap<void> m_wrapperMap;
-};
-
-} // namespace WebCore
-
-#endif // DOMDataStore_h