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 #include "V8CustomVoidCallback.h" 33 34 #include "ScriptExecutionContext.h" 35 #include "V8Binding.h" 36 #include "V8Proxy.h" 37 38 namespace WebCore { 39 40 V8CustomVoidCallback::V8CustomVoidCallback(v8::Local<v8::Object> callback, ScriptExecutionContext *context) 41 : m_callback(v8::Persistent<v8::Object>::New(callback)) 42 , m_scriptExecutionContext(context) 43 , m_worldContext(UseCurrentWorld) 44 { 45 } 46 47 V8CustomVoidCallback::~V8CustomVoidCallback() 48 { 49 m_callback.Dispose(); 50 } 51 52 void V8CustomVoidCallback::handleEvent() 53 { 54 v8::HandleScope handleScope; 55 56 v8::Handle<v8::Context> v8Context = toV8Context(m_scriptExecutionContext.get(), m_worldContext); 57 if (v8Context.IsEmpty()) 58 return; 59 60 v8::Context::Scope scope(v8Context); 61 62 bool callbackReturnValue = false; 63 invokeCallback(m_callback, 0, 0, callbackReturnValue, m_scriptExecutionContext.get()); 64 } 65 66 bool invokeCallback(v8::Persistent<v8::Object> callback, int argc, v8::Handle<v8::Value> argv[], bool& callbackReturnValue, ScriptExecutionContext* scriptExecutionContext) 67 { 68 v8::TryCatch exceptionCatcher; 69 exceptionCatcher.SetVerbose(true); 70 71 v8::Local<v8::Function> callbackFunction; 72 if (callback->IsFunction()) { 73 callbackFunction = v8::Local<v8::Function>::New(v8::Persistent<v8::Function>::Cast(callback)); 74 } else if (callback->IsObject()) { 75 v8::Local<v8::Value> handleEventFunction = callback->Get(v8::String::NewSymbol("handleEvent")); 76 if (handleEventFunction->IsFunction()) 77 callbackFunction = v8::Local<v8::Function>::Cast(handleEventFunction); 78 } else 79 return false; 80 81 if (callbackFunction.IsEmpty()) 82 return false; 83 84 v8::Handle<v8::Object> thisObject = v8::Context::GetCurrent()->Global(); 85 86 v8::Handle<v8::Value> result = callbackFunction->Call(thisObject, argc, argv); 87 callbackReturnValue = !result.IsEmpty() && result->BooleanValue(); 88 return exceptionCatcher.HasCaught(); 89 } 90 91 } // namespace WebCore 92
