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/*
* Copyright (C) 2010 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:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS 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 APPLE OR ITS 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"
#include "IDBTransaction.h"
#if ENABLE(INDEXED_DATABASE)
#include "Document.h"
#include "EventException.h"
#include "EventQueue.h"
#include "IDBDatabase.h"
#include "IDBDatabaseException.h"
#include "IDBEventDispatcher.h"
#include "IDBIndex.h"
#include "IDBObjectStore.h"
#include "IDBObjectStoreBackendInterface.h"
#include "IDBPendingTransactionMonitor.h"
namespace WebCore {
PassRefPtr<IDBTransaction> IDBTransaction::create(ScriptExecutionContext* context, PassRefPtr<IDBTransactionBackendInterface> backend, IDBDatabase* db)
{
return adoptRef(new IDBTransaction(context, backend, db));
}
IDBTransaction::IDBTransaction(ScriptExecutionContext* context, PassRefPtr<IDBTransactionBackendInterface> backend, IDBDatabase* db)
: ActiveDOMObject(context, this)
, m_backend(backend)
, m_database(db)
, m_mode(m_backend->mode())
, m_finished(false)
{
ASSERT(m_backend);
IDBPendingTransactionMonitor::addPendingTransaction(m_backend.get());
}
IDBTransaction::~IDBTransaction()
{
}
IDBTransactionBackendInterface* IDBTransaction::backend() const
{
return m_backend.get();
}
bool IDBTransaction::finished() const
{
return m_finished;
}
unsigned short IDBTransaction::mode() const
{
return m_mode;
}
IDBDatabase* IDBTransaction::db() const
{
return m_database.get();
}
PassRefPtr<IDBObjectStore> IDBTransaction::objectStore(const String& name, ExceptionCode& ec)
{
if (m_finished) {
ec = IDBDatabaseException::NOT_ALLOWED_ERR;
return 0;
}
RefPtr<IDBObjectStoreBackendInterface> objectStoreBackend = m_backend->objectStore(name, ec);
if (!objectStoreBackend) {
ASSERT(ec);
return 0;
}
RefPtr<IDBObjectStore> objectStore = IDBObjectStore::create(objectStoreBackend, this);
return objectStore.release();
}
void IDBTransaction::abort()
{
RefPtr<IDBTransaction> selfRef = this;
if (m_backend)
m_backend->abort();
}
void IDBTransaction::registerRequest(IDBRequest* request)
{
m_childRequests.add(request);
}
void IDBTransaction::unregisterRequest(IDBRequest* request)
{
// If we aborted the request, it will already have been removed.
m_childRequests.remove(request);
}
void IDBTransaction::onAbort()
{
while (!m_childRequests.isEmpty()) {
IDBRequest* request = *m_childRequests.begin();
m_childRequests.remove(request);
request->abort();
}
enqueueEvent(Event::create(eventNames().abortEvent, true, false));
}
void IDBTransaction::onComplete()
{
enqueueEvent(Event::create(eventNames().completeEvent, false, false));
}
bool IDBTransaction::hasPendingActivity() const
{
// FIXME: In an ideal world, we should return true as long as anyone has a or can
// get a handle to us or any child request object and any of those have
// event listeners. This is in order to handle user generated events properly.
return !m_finished || ActiveDOMObject::hasPendingActivity();
}
ScriptExecutionContext* IDBTransaction::scriptExecutionContext() const
{
return ActiveDOMObject::scriptExecutionContext();
}
bool IDBTransaction::dispatchEvent(PassRefPtr<Event> event)
{
ASSERT(!m_finished);
ASSERT(scriptExecutionContext());
ASSERT(event->target() == this);
ASSERT(!m_finished);
m_finished = true;
Vector<RefPtr<EventTarget> > targets;
targets.append(this);
targets.append(db());
// FIXME: When we allow custom event dispatching, this will probably need to change.
ASSERT(event->type() == eventNames().completeEvent || event->type() == eventNames().abortEvent);
return IDBEventDispatcher::dispatch(event.get(), targets);
}
bool IDBTransaction::canSuspend() const
{
// FIXME: Technically we can suspend before the first request is schedule
// and after the complete/abort event is enqueued.
return m_finished;
}
void IDBTransaction::contextDestroyed()
{
ActiveDOMObject::contextDestroyed();
// Must happen in contextDestroyed since it can result in ActiveDOMObjects being destructed
// (and contextDestroyed is the only one resilient against this).
RefPtr<IDBTransaction> selfRef = this;
if (m_backend)
m_backend->abort();
m_finished = true;
}
void IDBTransaction::enqueueEvent(PassRefPtr<Event> event)
{
ASSERT(!m_finished);
if (!scriptExecutionContext())
return;
ASSERT(scriptExecutionContext()->isDocument());
EventQueue* eventQueue = static_cast<Document*>(scriptExecutionContext())->eventQueue();
event->setTarget(this);
eventQueue->enqueueEvent(event);
}
EventTargetData* IDBTransaction::eventTargetData()
{
return &m_eventTargetData;
}
EventTargetData* IDBTransaction::ensureEventTargetData()
{
return &m_eventTargetData;
}
}
#endif // ENABLE(INDEXED_DATABASE)
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