1 /*
2 * Copyright (C) 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 "Worker.h"
36
37 #include "ExceptionCode.h"
38 #include "Frame.h"
39 #include "V8Binding.h"
40 #include "V8CustomBinding.h"
41 #include "V8ObjectEventListener.h"
42 #include "V8Proxy.h"
43 #include "V8Utilities.h"
44 #include "WorkerContext.h"
45 #include "WorkerContextExecutionProxy.h"
46
47 namespace WebCore {
48
CALLBACK_FUNC_DECL(WorkerConstructor)49 CALLBACK_FUNC_DECL(WorkerConstructor)
50 {
51 INC_STATS(L"DOM.Worker.Constructor");
52
53 if (!args.IsConstructCall())
54 return throwError("DOM object constructor cannot be called as a function.");
55
56 if (!args.Length())
57 return throwError("Not enough arguments", V8Proxy::SyntaxError);
58
59 v8::TryCatch tryCatch;
60 v8::Handle<v8::String> scriptUrl = args[0]->ToString();
61 if (tryCatch.HasCaught())
62 return throwError(tryCatch.Exception());
63
64 if (scriptUrl.IsEmpty())
65 return v8::Undefined();
66
67 // Get the script execution context.
68 ScriptExecutionContext* context = 0;
69 WorkerContextExecutionProxy* proxy = WorkerContextExecutionProxy::retrieve();
70 if (proxy)
71 context = proxy->workerContext();
72 else {
73 Frame* frame = V8Proxy::retrieveFrameForCurrentContext();
74 if (!frame)
75 return v8::Undefined();
76 context = frame->document();
77 }
78
79 // Create the worker object.
80 // Note: it's OK to let this RefPtr go out of scope because we also call setDOMWrapper(), which effectively holds a reference to obj.
81 ExceptionCode ec = 0;
82 RefPtr<Worker> obj = Worker::create(toWebCoreString(scriptUrl), context, ec);
83 if (ec)
84 return throwError(ec);
85
86 // Setup the standard wrapper object internal fields.
87 v8::Handle<v8::Object> wrapperObject = args.Holder();
88 V8DOMWrapper::setDOMWrapper(wrapperObject, V8ClassIndex::WORKER, obj.get());
89
90 obj->ref();
91 V8DOMWrapper::setJSWrapperForActiveDOMObject(obj.get(), v8::Persistent<v8::Object>::New(wrapperObject));
92
93 return wrapperObject;
94 }
95
getEventListener(Worker * worker,v8::Local<v8::Value> value,bool isAttribute,bool findOnly)96 PassRefPtr<EventListener> getEventListener(Worker* worker, v8::Local<v8::Value> value, bool isAttribute, bool findOnly)
97 {
98 if (worker->scriptExecutionContext()->isWorkerContext()) {
99 WorkerContextExecutionProxy* workerContextProxy = WorkerContextExecutionProxy::retrieve();
100 ASSERT(workerContextProxy);
101 return workerContextProxy->findOrCreateObjectEventListener(value, isAttribute, findOnly);
102 }
103
104 V8Proxy* proxy = V8Proxy::retrieve(worker->scriptExecutionContext());
105 if (proxy) {
106 V8EventListenerList* list = proxy->objectListeners();
107 return findOnly ? list->findWrapper(value, isAttribute) : list->findOrCreateWrapper<V8ObjectEventListener>(proxy->frame(), value, isAttribute);
108 }
109
110 return 0;
111 }
112
ACCESSOR_GETTER(WorkerOnmessage)113 ACCESSOR_GETTER(WorkerOnmessage)
114 {
115 INC_STATS(L"DOM.Worker.onmessage._get");
116 Worker* worker = V8DOMWrapper::convertToNativeObject<Worker>(V8ClassIndex::WORKER, info.Holder());
117 if (worker->onmessage()) {
118 V8ObjectEventListener* listener = static_cast<V8ObjectEventListener*>(worker->onmessage());
119 v8::Local<v8::Object> v8Listener = listener->getListenerObject();
120 return v8Listener;
121 }
122 return v8::Undefined();
123 }
124
ACCESSOR_SETTER(WorkerOnmessage)125 ACCESSOR_SETTER(WorkerOnmessage)
126 {
127 INC_STATS(L"DOM.Worker.onmessage._set");
128 Worker* worker = V8DOMWrapper::convertToNativeObject<Worker>(V8ClassIndex::WORKER, info.Holder());
129 V8ObjectEventListener* oldListener = static_cast<V8ObjectEventListener*>(worker->onmessage());
130 if (value->IsNull()) {
131 if (oldListener) {
132 v8::Local<v8::Object> oldV8Listener = oldListener->getListenerObject();
133 removeHiddenDependency(info.Holder(), oldV8Listener, V8Custom::kWorkerRequestCacheIndex);
134 }
135
136 // Clear the listener.
137 worker->setOnmessage(0);
138 } else {
139 RefPtr<EventListener> listener = getEventListener(worker, value, true, false);
140 if (listener) {
141 if (oldListener) {
142 v8::Local<v8::Object> oldV8Listener = oldListener->getListenerObject();
143 removeHiddenDependency(info.Holder(), oldV8Listener, V8Custom::kWorkerRequestCacheIndex);
144 }
145
146 worker->setOnmessage(listener);
147 createHiddenDependency(info.Holder(), value, V8Custom::kWorkerRequestCacheIndex);
148 }
149 }
150 }
151
152 } // namespace WebCore
153
154 #endif // ENABLE(WORKERS)
155