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 #include "bindings/v8/V8WorkerGlobalScopeEventListener.h" 34 35 #include "V8Event.h" 36 #include "V8EventTarget.h" 37 #include "bindings/v8/V8Binding.h" 38 #include "bindings/v8/V8DOMWrapper.h" 39 #include "bindings/v8/V8GCController.h" 40 #include "bindings/v8/V8ScriptRunner.h" 41 #include "bindings/v8/WorkerScriptController.h" 42 #include "core/inspector/InspectorInstrumentation.h" 43 #include "core/workers/WorkerGlobalScope.h" 44 45 namespace WebCore { 46 47 V8WorkerGlobalScopeEventListener::V8WorkerGlobalScopeEventListener(v8::Local<v8::Object> listener, bool isInline) 48 : V8EventListener(listener, isInline) 49 { 50 } 51 52 void V8WorkerGlobalScopeEventListener::handleEvent(ScriptExecutionContext* context, Event* event) 53 { 54 if (!context) 55 return; 56 57 // The callback function on XMLHttpRequest can clear the event listener and destroys 'this' object. Keep a local reference to it. 58 // See issue 889829. 59 RefPtr<V8AbstractEventListener> protect(this); 60 61 v8::HandleScope handleScope; 62 63 WorkerScriptController* script = toWorkerGlobalScope(context)->script(); 64 if (!script) 65 return; 66 67 v8::Handle<v8::Context> v8Context = script->context(); 68 if (v8Context.IsEmpty()) 69 return; 70 71 // Enter the V8 context in which to perform the event handling. 72 v8::Context::Scope scope(v8Context); 73 74 // Get the V8 wrapper for the event object. 75 v8::Isolate* isolate = v8Context->GetIsolate(); 76 v8::Handle<v8::Value> jsEvent = toV8(event, v8::Handle<v8::Object>(), isolate); 77 78 invokeEventHandler(context, event, v8::Local<v8::Value>::New(isolate, jsEvent)); 79 } 80 81 v8::Local<v8::Value> V8WorkerGlobalScopeEventListener::callListenerFunction(ScriptExecutionContext* context, v8::Handle<v8::Value> jsEvent, Event* event) 82 { 83 v8::Local<v8::Function> handlerFunction = getListenerFunction(context); 84 v8::Local<v8::Object> receiver = getReceiverObject(context, event); 85 if (handlerFunction.IsEmpty() || receiver.IsEmpty()) 86 return v8::Local<v8::Value>(); 87 88 InspectorInstrumentationCookie cookie; 89 if (InspectorInstrumentation::timelineAgentEnabled(context)) { 90 String resourceName("undefined"); 91 int lineNumber = 1; 92 v8::ScriptOrigin origin = handlerFunction->GetScriptOrigin(); 93 if (!origin.ResourceName().IsEmpty()) { 94 resourceName = toWebCoreString(origin.ResourceName()); 95 lineNumber = handlerFunction->GetScriptLineNumber() + 1; 96 } 97 cookie = InspectorInstrumentation::willCallFunction(context, resourceName, lineNumber); 98 } 99 100 v8::Handle<v8::Value> parameters[1] = { jsEvent }; 101 v8::Local<v8::Value> result = V8ScriptRunner::callFunction(handlerFunction, context, receiver, WTF_ARRAY_LENGTH(parameters), parameters); 102 103 InspectorInstrumentation::didCallFunction(cookie); 104 105 return result; 106 } 107 108 v8::Local<v8::Object> V8WorkerGlobalScopeEventListener::getReceiverObject(ScriptExecutionContext* context, Event* event) 109 { 110 v8::Local<v8::Object> listener = getListenerObject(context); 111 112 if (!listener.IsEmpty() && !listener->IsFunction()) 113 return listener; 114 115 EventTarget* target = event->currentTarget(); 116 v8::Handle<v8::Value> value = toV8(target, v8::Handle<v8::Object>(), toV8Context(context, world())->GetIsolate()); 117 if (value.IsEmpty()) 118 return v8::Local<v8::Object>(); 119 return v8::Local<v8::Object>::New(v8::Handle<v8::Object>::Cast(value)); 120 } 121 122 } // namespace WebCore 123