1/* 2 * Copyright (C) 2006, 2007, 2008, 2009 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include "config.h" 32 33#if ENABLE(WORKERS) 34 35#include "V8WorkerContextEventListener.h" 36 37#include "V8Binding.h" 38#include "V8DOMWrapper.h" 39#include "V8Event.h" 40#include "WorkerContext.h" 41#include "WorkerContextExecutionProxy.h" 42 43namespace WebCore { 44 45static WorkerContextExecutionProxy* workerProxy(ScriptExecutionContext* context) 46{ 47 ASSERT(context->isWorkerContext()); 48 WorkerContext* workerContext = static_cast<WorkerContext*>(context); 49 return workerContext->script()->proxy(); 50} 51 52V8WorkerContextEventListener::V8WorkerContextEventListener(v8::Local<v8::Object> listener, bool isInline, const WorldContextHandle& worldContext) 53 : V8EventListener(listener, isInline, worldContext) 54{ 55} 56 57void V8WorkerContextEventListener::handleEvent(ScriptExecutionContext* context, Event* event) 58{ 59 if (!context) 60 return; 61 62 // The callback function on XMLHttpRequest can clear the event listener and destroys 'this' object. Keep a local reference to it. 63 // See issue 889829. 64 RefPtr<V8AbstractEventListener> protect(this); 65 66 v8::HandleScope handleScope; 67 68 WorkerContextExecutionProxy* proxy = workerProxy(context); 69 if (!proxy) 70 return; 71 72 v8::Handle<v8::Context> v8Context = proxy->context(); 73 if (v8Context.IsEmpty()) 74 return; 75 76 // Enter the V8 context in which to perform the event handling. 77 v8::Context::Scope scope(v8Context); 78 79 // Get the V8 wrapper for the event object. 80 v8::Handle<v8::Value> jsEvent = toV8(event); 81 82 invokeEventHandler(context, event, jsEvent); 83} 84 85v8::Local<v8::Value> V8WorkerContextEventListener::callListenerFunction(ScriptExecutionContext* context, v8::Handle<v8::Value> jsEvent, Event* event) 86{ 87 v8::Local<v8::Function> handlerFunction = getListenerFunction(context); 88 v8::Local<v8::Object> receiver = getReceiverObject(context, event); 89 if (handlerFunction.IsEmpty() || receiver.IsEmpty()) 90 return v8::Local<v8::Value>(); 91 92 v8::Handle<v8::Value> parameters[1] = { jsEvent }; 93 v8::Local<v8::Value> result = handlerFunction->Call(receiver, 1, parameters); 94 95 if (WorkerContextExecutionProxy* proxy = workerProxy(context)) 96 proxy->trackEvent(event); 97 98 return result; 99} 100 101v8::Local<v8::Object> V8WorkerContextEventListener::getReceiverObject(ScriptExecutionContext* context, Event* event) 102{ 103 v8::Local<v8::Object> listener = getListenerObject(context); 104 105 if (!listener.IsEmpty() && !listener->IsFunction()) 106 return listener; 107 108 EventTarget* target = event->currentTarget(); 109 v8::Handle<v8::Value> value = V8DOMWrapper::convertEventTargetToV8Object(target); 110 if (value.IsEmpty()) 111 return v8::Local<v8::Object>(); 112 return v8::Local<v8::Object>::New(v8::Handle<v8::Object>::Cast(value)); 113} 114 115} // namespace WebCore 116 117#endif // WORKERS 118