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/*
* Copyright (C) 2006, 2007, 2008, 2009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(WORKERS)
#include "V8WorkerContextEventListener.h"
#include "Event.h"
#include "V8Binding.h"
#include "V8Utilities.h"
#include "WorkerContextExecutionProxy.h"
namespace WebCore {
V8WorkerContextEventListener::V8WorkerContextEventListener(WorkerContextExecutionProxy* proxy, PassRefPtr<V8ListenerGuard> guard, v8::Local<v8::Object> listener, bool isInline)
: V8EventListener(0, guard, listener, isInline)
, m_proxy(proxy)
{
}
void V8WorkerContextEventListener::handleEvent(ScriptExecutionContext*, Event* event)
{
// Is the EventListener disconnected?
if (disconnected())
return;
// The callback function on XMLHttpRequest can clear the event listener and destroys 'this' object. Keep a local reference to it.
// See issue 889829.
RefPtr<V8AbstractEventListener> protect(this);
LOCK_V8;
v8::HandleScope handleScope;
v8::Handle<v8::Context> context = m_proxy->context();
if (context.IsEmpty())
return;
// Enter the V8 context in which to perform the event handling.
v8::Context::Scope scope(context);
// Get the V8 wrapper for the event object.
v8::Handle<v8::Value> jsEvent = WorkerContextExecutionProxy::convertEventToV8Object(event);
invokeEventHandler(context, event, jsEvent);
}
bool V8WorkerContextEventListener::reportError(const String& message, const String& url, int lineNumber)
{
// Is the EventListener disconnected?
if (disconnected())
return false;
// The callback function can clear the event listener and destroy 'this' object. Keep a local reference to it.
RefPtr<V8AbstractEventListener> protect(this);
v8::HandleScope handleScope;
v8::Handle<v8::Context> context = m_proxy->context();
if (context.IsEmpty())
return false;
// Enter the V8 context in which to perform the event handling.
v8::Context::Scope scope(context);
v8::Local<v8::Object> listener = getListenerObject();
v8::Local<v8::Value> returnValue;
{
// Catch exceptions thrown in calling the function so they do not propagate to javascript code that caused the event to fire.
v8::TryCatch tryCatch;
tryCatch.SetVerbose(true);
// Call the function.
if (!listener.IsEmpty() && listener->IsFunction()) {
v8::Local<v8::Function> callFunction = v8::Local<v8::Function>::Cast(listener);
v8::Local<v8::Object> thisValue = v8::Context::GetCurrent()->Global();
v8::Handle<v8::Value> parameters[3] = { v8String(message), v8String(url), v8::Integer::New(lineNumber) };
returnValue = callFunction->Call(thisValue, 3, parameters);
}
// If an error occurs while handling the script error, it should be bubbled up.
if (tryCatch.HasCaught()) {
tryCatch.Reset();
return false;
}
}
// If the function returns false, then the error is handled. Otherwise, the error is not handled.
bool errorHandled = returnValue->IsBoolean() && !returnValue->BooleanValue();
return errorHandled;
}
v8::Local<v8::Value> V8WorkerContextEventListener::callListenerFunction(v8::Handle<v8::Value> jsEvent, Event* event)
{
v8::Local<v8::Function> handlerFunction = getListenerFunction();
v8::Local<v8::Object> receiver = getReceiverObject(event);
if (handlerFunction.IsEmpty() || receiver.IsEmpty())
return v8::Local<v8::Value>();
v8::Handle<v8::Value> parameters[1] = { jsEvent };
v8::Local<v8::Value> result = handlerFunction->Call(receiver, 1, parameters);
m_proxy->trackEvent(event);
return result;
}
v8::Local<v8::Object> V8WorkerContextEventListener::getReceiverObject(Event* event)
{
v8::Local<v8::Object> listener = getListenerObject();
if (!listener.IsEmpty() && !listener->IsFunction())
return listener;
EventTarget* target = event->currentTarget();
v8::Handle<v8::Value> value = WorkerContextExecutionProxy::convertEventTargetToV8Object(target);
if (value.IsEmpty())
return v8::Local<v8::Object>();
return v8::Local<v8::Object>::New(v8::Handle<v8::Object>::Cast(value));
}
} // namespace WebCore
#endif // WORKERS
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