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 "V8Binding.h" 33 #include "V8CustomVoidCallback.h" 34 35 #include "Frame.h" 36 37 namespace WebCore { 38 39 V8CustomVoidCallback::V8CustomVoidCallback(v8::Local<v8::Object> callback, Frame* frame) 40 : m_callback(v8::Persistent<v8::Object>::New(callback)) 41 , m_frame(frame) 42 { 43 } 44 45 V8CustomVoidCallback::~V8CustomVoidCallback() 46 { 47 m_callback.Dispose(); 48 } 49 50 void V8CustomVoidCallback::handleEvent() 51 { 52 v8::HandleScope handleScope; 53 54 v8::Handle<v8::Context> context = V8Proxy::context(m_frame.get()); 55 if (context.IsEmpty()) 56 return; 57 58 v8::Context::Scope scope(context); 59 60 // Protect the frame until the callback returns. 61 RefPtr<Frame> protector(m_frame); 62 63 bool callbackReturnValue = false; 64 invokeCallback(m_callback, 0, 0, callbackReturnValue); 65 } 66 67 bool invokeCallback(v8::Persistent<v8::Object> callback, int argc, v8::Handle<v8::Value> argv[], bool& callbackReturnValue) 68 { 69 v8::TryCatch exceptionCatcher; 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 } 79 } else 80 return false; 81 82 if (callbackFunction.IsEmpty()) 83 return false; 84 85 v8::Handle<v8::Object> thisObject = v8::Context::GetCurrent()->Global(); 86 87 V8Proxy* proxy = V8Proxy::retrieve(); 88 ASSERT(proxy); 89 90 v8::Handle<v8::Value> result = proxy->callFunction(callbackFunction, thisObject, argc, argv); 91 92 callbackReturnValue = !result.IsEmpty() && result->IsBoolean() && result->BooleanValue(); 93 94 if (exceptionCatcher.HasCaught()) { 95 v8::Local<v8::Message> message = exceptionCatcher.Message(); 96 proxy->frame()->document()->reportException(toWebCoreString(message->Get()), message->GetLineNumber(), toWebCoreString(message->GetScriptResourceName())); 97 return true; 98 } 99 100 return false; 101 } 102 103 } // namespace WebCore 104
