/* * Copyright (C) 2011 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 NPObjectWrapper_h #define NPObjectWrapper_h #include "npruntime_impl.h" namespace WebCore { // This class wraps a NPObject and provides functionality for the wrapped // object to be cleared out when this object is destroyed. This is to ensure // that callers trying to access the underlying object don't crash while // invoking methods on the NPObject. class NPObjectWrapper { public: // Creates an instance of the NPObjectWrapper class and wraps the object // passed in. static NPObject* create(NPObject* object); // This method should be called to invalidate the underlying NPObject pointer. void clear(); // Returns a pointer to NPObjectWrapper if the object passed in was wrapped by us. static NPObjectWrapper* getWrapper(NPObject* obj); // Returns a pointer to the underlying raw NPObject pointer or 0 if the object // passed in was not wrapped. static NPObject* getUnderlyingNPObject(NPObject* obj); // NPObject functions implemented by the wrapper. static NPObject* NPAllocate(NPP, NPClass*); static void NPDeallocate(NPObject* obj); static void NPPInvalidate(NPObject *obj); static bool NPHasMethod(NPObject* obj, NPIdentifier name); static bool NPInvoke(NPObject* obj, NPIdentifier name, const NPVariant* args, uint32_t argCount, NPVariant* result); static bool NPInvokeDefault(NPObject* obj, const NPVariant* args, uint32_t argCount, NPVariant* result); static bool NPHasProperty(NPObject* obj, NPIdentifier name); static bool NPGetProperty(NPObject* obj, NPIdentifier name, NPVariant* result); static bool NPSetProperty(NPObject* obj, NPIdentifier name, const NPVariant *value); static bool NPRemoveProperty(NPObject* obj, NPIdentifier name); static bool NPNEnumerate(NPObject* obj, NPIdentifier **value, uint32_t* count); static bool NPNConstruct(NPObject* obj, const NPVariant* args, uint32_t argCount, NPVariant* result); static bool NPInvokePrivate(NPP npp, NPObject* obj,bool isDefault, NPIdentifier name, const NPVariant* args, uint32_t argCount, NPVariant* result); private: NPObjectWrapper(NPObject* obj); // Returns the underlying NPObject if the object passed in was wrapped. Otherwise // just returns the object passed in. static NPObject* getObjectForCall(NPObject* obj); static NPClass m_npClassWrapper; // Weak NPObject poointer. NPObject* m_wrappedNPObject; }; } // namespace WebCore #endif // NPObjectWrapper_h