1 /* 2 * Copyright (C) 2006, 2007, 2008, 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 "V8EventListener.h" 33 34 #include "V8Proxy.h" 35 36 namespace WebCore { 37 38 V8EventListener::V8EventListener(v8::Local<v8::Object> listener, bool isAttribute, const WorldContextHandle& worldContext) 39 : V8AbstractEventListener(isAttribute, worldContext) 40 { 41 setListenerObject(listener); 42 } 43 44 v8::Local<v8::Function> V8EventListener::getListenerFunction(ScriptExecutionContext* context) 45 { 46 v8::Local<v8::Object> listener = getListenerObject(context); 47 48 // Has the listener been disposed? 49 if (listener.IsEmpty()) 50 return v8::Local<v8::Function>(); 51 52 if (listener->IsFunction()) 53 return v8::Local<v8::Function>::Cast(listener); 54 55 if (listener->IsObject()) { 56 v8::Local<v8::Value> property = listener->Get(v8::String::NewSymbol("handleEvent")); 57 // Check that no exceptions were thrown when getting the 58 // handleEvent property and that the value is a function. 59 if (!property.IsEmpty() && property->IsFunction()) 60 return v8::Local<v8::Function>::Cast(property); 61 } 62 63 return v8::Local<v8::Function>(); 64 } 65 66 v8::Local<v8::Value> V8EventListener::callListenerFunction(ScriptExecutionContext* context, v8::Handle<v8::Value> jsEvent, Event* event) 67 { 68 69 v8::Local<v8::Function> handlerFunction = getListenerFunction(context); 70 v8::Local<v8::Object> receiver = getReceiverObject(event); 71 if (handlerFunction.IsEmpty() || receiver.IsEmpty()) 72 return v8::Local<v8::Value>(); 73 74 v8::Handle<v8::Value> parameters[1] = { jsEvent }; 75 76 if (V8Proxy* proxy = V8Proxy::retrieve(context)) 77 return proxy->callFunction(handlerFunction, receiver, 1, parameters); 78 79 return v8::Local<v8::Value>(); 80 } 81 82 } // namespace WebCore 83
