18f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian/* 28f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * Copyright (C) 2006, 2007, 2008, 2009 Google Inc. All rights reserved. 38f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * 48f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * Redistribution and use in source and binary forms, with or without 58f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * modification, are permitted provided that the following conditions are 68f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * met: 78f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * 88f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * * Redistributions of source code must retain the above copyright 98f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * notice, this list of conditions and the following disclaimer. 108f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * * Redistributions in binary form must reproduce the above 118f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * copyright notice, this list of conditions and the following disclaimer 128f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * in the documentation and/or other materials provided with the 138f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * distribution. 148f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * * Neither the name of Google Inc. nor the names of its 158f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * contributors may be used to endorse or promote products derived from 168f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * this software without specific prior written permission. 178f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * 188f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 198f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 208f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 218f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 228f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 238f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 248f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 258f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 268f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 278f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 288f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 298f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian */ 308f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 318f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian#include "config.h" 328f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian#include "V8AbstractEventListener.h" 338f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 34231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block#include "DateExtension.h" 358f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian#include "Document.h" 368f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian#include "Event.h" 378f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian#include "Frame.h" 388f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian#include "V8Binding.h" 395e2bc6953fe6923165b8a5d7679939693a1d58d6Steve Block#include "V8Event.h" 40231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block#include "V8EventListenerList.h" 41ca9cb53ed1119a3fd98fafa0972ffeb56dee1c24Steve Block#include "V8HiddenPropertyName.h" 42231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block#include "V8Proxy.h" 43231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block#include "V8Utilities.h" 44cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Block#include "WorkerContext.h" 45cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Block#include "WorkerContextExecutionProxy.h" 468f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 478f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qiannamespace WebCore { 488f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 49231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Blockstatic void weakEventListenerCallback(v8::Persistent<v8::Value>, void* parameter) 50231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block{ 51231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block V8AbstractEventListener* listener = static_cast<V8AbstractEventListener*>(parameter); 52231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block listener->disposeListenerObject(); 53231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block} 54231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block 55643ca7872b450ea4efacab6188849e5aac2ba161Steve BlockV8AbstractEventListener::V8AbstractEventListener(bool isAttribute, const WorldContextHandle& worldContext) 56231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block : EventListener(JSEventListenerType) 57231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block , m_isWeak(true) 58231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block , m_isAttribute(isAttribute) 59643ca7872b450ea4efacab6188849e5aac2ba161Steve Block , m_worldContext(worldContext) 608f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian{ 618f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian} 628f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 63231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve BlockV8AbstractEventListener::~V8AbstractEventListener() 648f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian{ 65231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block if (!m_listener.IsEmpty()) { 66231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block v8::HandleScope scope; 67231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block v8::Local<v8::Object> listener = v8::Local<v8::Object>::New(m_listener); 68231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block V8EventListenerList::clearWrapper(listener, m_isAttribute); 698f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian } 70231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block disposeListenerObject(); 718f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian} 728f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 73cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Blockvoid V8AbstractEventListener::handleEvent(ScriptExecutionContext* context, Event* event) 748f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian{ 75dd888d7ab78958132c660a402edcc490bf690620Ben Murdoch#ifdef ANDROID 76dd888d7ab78958132c660a402edcc490bf690620Ben Murdoch // Monkey data shows that we can crash here, due to script executing while the 77dd888d7ab78958132c660a402edcc490bf690620Ben Murdoch // page's frame has been detached (in the middle of a navigation). 78dd888d7ab78958132c660a402edcc490bf690620Ben Murdoch // See b/5201341 79dd888d7ab78958132c660a402edcc490bf690620Ben Murdoch if (!context) 80dd888d7ab78958132c660a402edcc490bf690620Ben Murdoch return; 81dd888d7ab78958132c660a402edcc490bf690620Ben Murdoch#endif 82dd888d7ab78958132c660a402edcc490bf690620Ben Murdoch 832daae5fd11344eaa88a0d92b0f6d65f8d2255c00Ben Murdoch // Don't reenter V8 if execution was terminated in this instance of V8. 842daae5fd11344eaa88a0d92b0f6d65f8d2255c00Ben Murdoch if (context->isJSExecutionForbidden()) 852daae5fd11344eaa88a0d92b0f6d65f8d2255c00Ben Murdoch return; 862daae5fd11344eaa88a0d92b0f6d65f8d2255c00Ben Murdoch 8721939df44de1705786c545cd1bf519d47250322dBen Murdoch ASSERT(event); 8821939df44de1705786c545cd1bf519d47250322dBen Murdoch 898f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian // The callback function on XMLHttpRequest can clear the event listener and destroys 'this' object. Keep a local reference to it. 908f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian // See issue 889829. 918f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian RefPtr<V8AbstractEventListener> protect(this); 928f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 938f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian v8::HandleScope handleScope; 948f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 95643ca7872b450ea4efacab6188849e5aac2ba161Steve Block v8::Local<v8::Context> v8Context = toV8Context(context, worldContext()); 960bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch if (v8Context.IsEmpty()) 978f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian return; 988f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 998f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian // Enter the V8 context in which to perform the event handling. 1000bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch v8::Context::Scope scope(v8Context); 1018f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 1028f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian // Get the V8 wrapper for the event object. 1035e2bc6953fe6923165b8a5d7679939693a1d58d6Steve Block v8::Handle<v8::Value> jsEvent = toV8(event); 10421939df44de1705786c545cd1bf519d47250322dBen Murdoch ASSERT(!jsEvent.IsEmpty()); 1058f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 106cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Block invokeEventHandler(context, event, jsEvent); 1078f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian} 1088f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 1098f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qianvoid V8AbstractEventListener::disposeListenerObject() 1108f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian{ 1118f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian if (!m_listener.IsEmpty()) { 1128f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian#ifndef NDEBUG 1130bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch V8GCController::unregisterGlobalHandle(this, m_listener); 1148f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian#endif 1158f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian m_listener.Dispose(); 1168f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian m_listener.Clear(); 1178f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian } 1188f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian} 1198f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 120231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Blockvoid V8AbstractEventListener::setListenerObject(v8::Handle<v8::Object> listener) 121231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block{ 122231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block disposeListenerObject(); 123231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block m_listener = v8::Persistent<v8::Object>::New(listener); 124231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block#ifndef NDEBUG 125231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block V8GCController::registerGlobalHandle(EVENT_LISTENER, this, m_listener); 126231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block#endif 127231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block if (m_isWeak) 128231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block m_listener.MakeWeak(this, &weakEventListenerCallback); 129231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block} 130231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block 131cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Blockvoid V8AbstractEventListener::invokeEventHandler(ScriptExecutionContext* context, Event* event, v8::Handle<v8::Value> jsEvent) 132231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block{ 13321939df44de1705786c545cd1bf519d47250322dBen Murdoch // If jsEvent is empty, attempt to set it as a hidden value would crash v8. 13421939df44de1705786c545cd1bf519d47250322dBen Murdoch if (jsEvent.IsEmpty()) 13521939df44de1705786c545cd1bf519d47250322dBen Murdoch return; 136cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Block 137643ca7872b450ea4efacab6188849e5aac2ba161Steve Block v8::Local<v8::Context> v8Context = toV8Context(context, worldContext()); 138cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Block if (v8Context.IsEmpty()) 139cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Block return; 140cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Block 141231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block // We push the event being processed into the global object, so that it can be exposed by DOMWindow's bindings. 142ca9cb53ed1119a3fd98fafa0972ffeb56dee1c24Steve Block v8::Handle<v8::String> eventSymbol = V8HiddenPropertyName::event(); 143231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block v8::Local<v8::Value> returnValue; 144231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block 145231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block // In beforeunload/unload handlers, we want to avoid sleeps which do tight loops of calling Date.getTime(). 146231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block if (event->type() == "beforeunload" || event->type() == "unload") 147231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block DateExtension::get()->setAllowSleep(false); 148231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block 149231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block { 150231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block // Catch exceptions thrown in the event handler so they do not propagate to javascript code that caused the event to fire. 151231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block v8::TryCatch tryCatch; 152231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block tryCatch.SetVerbose(true); 153231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block 154231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block // Save the old 'event' property so we can restore it later. 155231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block v8::Local<v8::Value> savedEvent = v8Context->Global()->GetHiddenValue(eventSymbol); 156231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block tryCatch.Reset(); 157231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block 158231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block // Make the event available in the global object, so DOMWindow can expose it. 159231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block v8Context->Global()->SetHiddenValue(eventSymbol, jsEvent); 160231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block tryCatch.Reset(); 161231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block 162cac0f67c402d107cdb10971b95719e2ff9c7c76bSteve Block returnValue = callListenerFunction(context, jsEvent, event); 16381bc750723a18f21cd17d1b173cd2a4dda9cea6eBen Murdoch if (tryCatch.HasCaught()) 16481bc750723a18f21cd17d1b173cd2a4dda9cea6eBen Murdoch event->target()->uncaughtExceptionInEventHandler(); 1652daae5fd11344eaa88a0d92b0f6d65f8d2255c00Ben Murdoch 1662daae5fd11344eaa88a0d92b0f6d65f8d2255c00Ben Murdoch if (!tryCatch.CanContinue()) { // Result of TerminateExecution(). 167574543de6f562b52e4e06c8b493c76dea160473fBen Murdoch#if ENABLE(WORKERS) 1682daae5fd11344eaa88a0d92b0f6d65f8d2255c00Ben Murdoch if (context->isWorkerContext()) 1692daae5fd11344eaa88a0d92b0f6d65f8d2255c00Ben Murdoch static_cast<WorkerContext*>(context)->script()->forbidExecution(); 170574543de6f562b52e4e06c8b493c76dea160473fBen Murdoch#endif 171231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block return; 1722daae5fd11344eaa88a0d92b0f6d65f8d2255c00Ben Murdoch } 173dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block tryCatch.Reset(); 174231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block 175231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block // Restore the old event. This must be done for all exit paths through this method. 176231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block if (savedEvent.IsEmpty()) 177231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block v8Context->Global()->SetHiddenValue(eventSymbol, v8::Undefined()); 178231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block else 179231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block v8Context->Global()->SetHiddenValue(eventSymbol, savedEvent); 180231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block tryCatch.Reset(); 181231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block } 182231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block 183231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block if (event->type() == "beforeunload" || event->type() == "unload") 184231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block DateExtension::get()->setAllowSleep(true); 185231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block 186231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block ASSERT(!V8Proxy::handleOutOfMemory() || returnValue.IsEmpty()); 187231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block 188231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block if (returnValue.IsEmpty()) 189231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block return; 190231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block 191231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block if (!returnValue->IsNull() && !returnValue->IsUndefined() && event->storesResultAsString()) 192231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block event->storeResult(toWebCoreString(returnValue)); 193231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block 194231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block // Prevent default action if the return value is false; 195231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block // FIXME: Add example, and reference to bug entry. 196231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block if (m_isAttribute && returnValue->IsBoolean() && !returnValue->BooleanValue()) 197231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block event->preventDefault(); 198231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block} 199231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Block 200231d4e3152a9c27a73b6ac7badbe6be673aa3ddfSteve Blockv8::Local<v8::Object> V8AbstractEventListener::getReceiverObject(Event* event) 2018f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian{ 2028f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian if (!m_listener.IsEmpty() && !m_listener->IsFunction()) 2038f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian return v8::Local<v8::Object>::New(m_listener); 2048f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 2058f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian EventTarget* target = event->currentTarget(); 2060bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch v8::Handle<v8::Value> value = V8DOMWrapper::convertEventTargetToV8Object(target); 2078f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian if (value.IsEmpty()) 2088f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian return v8::Local<v8::Object>(); 2098f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian return v8::Local<v8::Object>::New(v8::Handle<v8::Object>::Cast(value)); 2108f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian} 2118f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian 2128f72e70a9fd78eec56623b3a62e68f16b7b27e28Feng Qian} // namespace WebCore 213