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
37namespace WebCore {
38
39V8CustomVoidCallback::V8CustomVoidCallback(v8::Local<v8::Object> callback, Frame* frame)
40    : m_callback(v8::Persistent<v8::Object>::New(callback))
41    , m_frame(frame)
42{
43}
44
45V8CustomVoidCallback::~V8CustomVoidCallback()
46{
47    m_callback.Dispose();
48}
49
50void 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
67bool 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