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
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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