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
38namespace WebCore {
39
40V8CustomVoidCallback::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
47V8CustomVoidCallback::~V8CustomVoidCallback()
48{
49    m_callback.Dispose();
50}
51
52void 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
66bool 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