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/core/v8/V8WorkerGlobalScopeEventListener.h" 34 35#include "bindings/core/v8/V8Binding.h" 36#include "bindings/core/v8/V8DOMWrapper.h" 37#include "bindings/core/v8/V8Event.h" 38#include "bindings/core/v8/V8EventTarget.h" 39#include "bindings/core/v8/V8GCController.h" 40#include "bindings/core/v8/V8ScriptRunner.h" 41#include "bindings/core/v8/WorkerScriptController.h" 42#include "core/inspector/InspectorInstrumentation.h" 43#include "core/inspector/InspectorTraceEvents.h" 44#include "core/workers/WorkerGlobalScope.h" 45 46namespace blink { 47 48V8WorkerGlobalScopeEventListener::V8WorkerGlobalScopeEventListener(v8::Local<v8::Object> listener, bool isInline, ScriptState* scriptState) 49 : V8EventListener(listener, isInline, scriptState) 50{ 51} 52 53void V8WorkerGlobalScopeEventListener::handleEvent(ExecutionContext*, Event* event) 54{ 55 // The callback function on XMLHttpRequest can clear the event listener and destroys 'this' object. Keep a local reference to it. 56 // See issue 889829. 57 RefPtr<V8AbstractEventListener> protect(this); 58 59 WorkerScriptController* script = toWorkerGlobalScope(scriptState()->executionContext())->script(); 60 if (!script) 61 return; 62 63 if (scriptState()->contextIsValid()) 64 return; 65 ScriptState::Scope scope(scriptState()); 66 67 // Get the V8 wrapper for the event object. 68 v8::Handle<v8::Value> jsEvent = toV8(event, scriptState()->context()->Global(), isolate()); 69 70 invokeEventHandler(event, v8::Local<v8::Value>::New(isolate(), jsEvent)); 71} 72 73v8::Local<v8::Value> V8WorkerGlobalScopeEventListener::callListenerFunction(v8::Handle<v8::Value> jsEvent, Event* event) 74{ 75 v8::Local<v8::Function> handlerFunction = getListenerFunction(scriptState()->executionContext()); 76 v8::Local<v8::Object> receiver = getReceiverObject(event); 77 if (handlerFunction.IsEmpty() || receiver.IsEmpty()) 78 return v8::Local<v8::Value>(); 79 80 TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "FunctionCall", "data", devToolsTraceEventData(scriptState()->executionContext(), handlerFunction, isolate())); 81 TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline.stack"), "CallStack", "stack", InspectorCallStackEvent::currentCallStack()); 82 // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing. 83 InspectorInstrumentationCookie cookie; 84 if (InspectorInstrumentation::timelineAgentEnabled(scriptState()->executionContext())) { 85 int scriptId = 0; 86 String resourceName; 87 int lineNumber = 1; 88 GetDevToolsFunctionInfo(handlerFunction, isolate(), scriptId, resourceName, lineNumber); 89 cookie = InspectorInstrumentation::willCallFunction(scriptState()->executionContext(), scriptId, resourceName, lineNumber); 90 } 91 92 v8::Handle<v8::Value> parameters[1] = { jsEvent }; 93 v8::Local<v8::Value> result = V8ScriptRunner::callFunction(handlerFunction, scriptState()->executionContext(), receiver, WTF_ARRAY_LENGTH(parameters), parameters, isolate()); 94 95 InspectorInstrumentation::didCallFunction(cookie); 96 TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", "data", InspectorUpdateCountersEvent::data()); 97 98 return result; 99} 100 101v8::Local<v8::Object> V8WorkerGlobalScopeEventListener::getReceiverObject(Event* event) 102{ 103 v8::Local<v8::Object> listener = getListenerObject(scriptState()->executionContext()); 104 105 if (!listener.IsEmpty() && !listener->IsFunction()) 106 return listener; 107 108 EventTarget* target = event->currentTarget(); 109 v8::Handle<v8::Value> value = toV8(target, scriptState()->context()->Global(), isolate()); 110 if (value.IsEmpty()) 111 return v8::Local<v8::Object>(); 112 return v8::Local<v8::Object>::New(isolate(), v8::Handle<v8::Object>::Cast(value)); 113} 114 115} // namespace blink 116