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