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1 /*
2  * Copyright (C) 2011 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 #include "bindings/core/v8/V8MutationObserver.h"
33 
34 #include "bindings/core/v8/ExceptionMessages.h"
35 #include "bindings/core/v8/ExceptionState.h"
36 #include "bindings/core/v8/V8Binding.h"
37 #include "bindings/core/v8/V8DOMWrapper.h"
38 #include "bindings/core/v8/V8GCController.h"
39 #include "bindings/core/v8/V8MutationCallback.h"
40 #include "core/dom/MutationObserver.h"
41 #include "core/dom/Node.h"
42 
43 namespace blink {
44 
constructorCustom(const v8::FunctionCallbackInfo<v8::Value> & info)45 void V8MutationObserver::constructorCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
46 {
47     ExceptionState exceptionState(ExceptionState::ConstructionContext, "MutationObserver", info.Holder(), info.GetIsolate());
48     if (info.Length() < 1) {
49         exceptionState.throwTypeError(ExceptionMessages::notEnoughArguments(1, info.Length()));
50         exceptionState.throwIfNeeded();
51         return;
52     }
53 
54     v8::Local<v8::Value> arg = info[0];
55     if (!arg->IsFunction()) {
56         exceptionState.throwTypeError("Callback argument must be a function");
57         exceptionState.throwIfNeeded();
58         return;
59     }
60 
61     v8::Handle<v8::Object> wrapper = info.Holder();
62 
63     OwnPtr<MutationCallback> callback = V8MutationCallback::create(v8::Handle<v8::Function>::Cast(arg), wrapper, ScriptState::current(info.GetIsolate()));
64     RefPtrWillBeRawPtr<MutationObserver> observer = MutationObserver::create(callback.release());
65 
66     V8DOMWrapper::associateObjectWithWrapper<V8MutationObserver>(observer.release(), &wrapperTypeInfo, wrapper, info.GetIsolate());
67     info.GetReturnValue().Set(wrapper);
68 }
69 
visitDOMWrapper(ScriptWrappableBase * internalPointer,const v8::Persistent<v8::Object> & wrapper,v8::Isolate * isolate)70 void V8MutationObserver::visitDOMWrapper(ScriptWrappableBase* internalPointer, const v8::Persistent<v8::Object>& wrapper, v8::Isolate* isolate)
71 {
72     MutationObserver* observer = internalPointer->toImpl<MutationObserver>();
73     WillBeHeapHashSet<RawPtrWillBeMember<Node> > observedNodes = observer->getObservedNodes();
74     for (WillBeHeapHashSet<RawPtrWillBeMember<Node> >::iterator it = observedNodes.begin(); it != observedNodes.end(); ++it) {
75         v8::UniqueId id(reinterpret_cast<intptr_t>(V8GCController::opaqueRootForGC(*it, isolate)));
76         isolate->SetReferenceFromGroup(id, wrapper);
77     }
78 }
79 
80 } // namespace blink
81