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
V8CustomVoidCallback(v8::Local<v8::Object> callback,ScriptExecutionContext * context)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
~V8CustomVoidCallback()47 V8CustomVoidCallback::~V8CustomVoidCallback()
48 {
49 m_callback.Dispose();
50 }
51
handleEvent()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
invokeCallback(v8::Persistent<v8::Object> callback,int argc,v8::Handle<v8::Value> argv[],bool & callbackReturnValue,ScriptExecutionContext * scriptExecutionContext)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