1/*
2 * Copyright (C) 2013 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "bindings/core/v8/V8MutationCallback.h"
28
29#include "bindings/core/v8/ScriptController.h"
30#include "bindings/core/v8/V8Binding.h"
31#include "bindings/core/v8/V8HiddenValue.h"
32#include "bindings/core/v8/V8MutationObserver.h"
33#include "bindings/core/v8/V8MutationRecord.h"
34#include "core/dom/ExecutionContext.h"
35#include "wtf/Assertions.h"
36
37namespace blink {
38
39V8MutationCallback::V8MutationCallback(v8::Handle<v8::Function> callback, v8::Handle<v8::Object> owner, ScriptState* scriptState)
40    : ActiveDOMCallback(scriptState->executionContext())
41    , m_callback(scriptState->isolate(), callback)
42    , m_scriptState(scriptState)
43{
44    V8HiddenValue::setHiddenValue(scriptState->isolate(), owner, V8HiddenValue::callback(scriptState->isolate()), callback);
45    m_callback.setWeak(this, &setWeakCallback);
46}
47
48void V8MutationCallback::call(const WillBeHeapVector<RefPtrWillBeMember<MutationRecord> >& mutations, MutationObserver* observer)
49{
50    if (!canInvokeCallback())
51        return;
52
53    v8::Isolate* isolate = m_scriptState->isolate();
54
55    if (m_scriptState->contextIsValid())
56        return;
57    ScriptState::Scope scope(m_scriptState.get());
58
59    if (m_callback.isEmpty())
60        return;
61    v8::Handle<v8::Value> observerHandle = toV8(observer, m_scriptState->context()->Global(), isolate);
62    if (observerHandle.IsEmpty()) {
63        if (!isScriptControllerTerminating())
64            CRASH();
65        return;
66    }
67
68    if (!observerHandle->IsObject())
69        return;
70
71    v8::Handle<v8::Object> thisObject = v8::Handle<v8::Object>::Cast(observerHandle);
72    v8::Handle<v8::Value> argv[] = { v8Array(mutations, m_scriptState->context()->Global(), isolate), observerHandle };
73
74    v8::TryCatch exceptionCatcher;
75    exceptionCatcher.SetVerbose(true);
76    ScriptController::callFunction(executionContext(), m_callback.newLocal(isolate), thisObject, WTF_ARRAY_LENGTH(argv), argv, isolate);
77}
78
79void V8MutationCallback::setWeakCallback(const v8::WeakCallbackData<v8::Function, V8MutationCallback>& data)
80{
81    data.GetParameter()->m_callback.clear();
82}
83
84} // namespace blink
85