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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <doceventnotifier.hxx>
#include <basctl/scriptdocument.hxx>
#include <com/sun/star/frame/theGlobalEventBroadcaster.hpp>
#include <vcl/svapp.hxx>
#include <comphelper/compbase.hxx>
#include <comphelper/diagnose_ex.hxx>
#include <comphelper/processfactory.hxx>
namespace basctl
{
using ::com::sun::star::document::XDocumentEventBroadcaster;
using ::com::sun::star::document::XDocumentEventListener;
using ::com::sun::star::document::DocumentEvent;
using ::com::sun::star::uno::XComponentContext;
using ::com::sun::star::uno::Reference;
using ::com::sun::star::uno::UNO_QUERY_THROW;
using ::com::sun::star::uno::Exception;
using ::com::sun::star::frame::XModel;
using ::com::sun::star::frame::theGlobalEventBroadcaster;
using ::com::sun::star::uno::UNO_QUERY;
// DocumentEventNotifier::Impl
typedef ::comphelper::WeakComponentImplHelper< XDocumentEventListener
> DocumentEventNotifier_Impl_Base;
namespace {
enum ListenerAction
{
RegisterListener,
RemoveListener
};
}
/** impl class for DocumentEventNotifier
*/
class DocumentEventNotifier::Impl : public DocumentEventNotifier_Impl_Base
{
public:
// noncopyable
Impl(const Impl&) = delete;
Impl& operator=(const Impl&) = delete;
Impl (DocumentEventListener&, Reference<XModel> const& rxDocument);
virtual ~Impl () override;
// XDocumentEventListener
virtual void SAL_CALL documentEventOccured( const DocumentEvent& Event ) override;
// XEventListener
virtual void SAL_CALL disposing( const css::lang::EventObject& Event ) override;
// WeakComponentImplHelper
virtual void disposing(std::unique_lock<std::mutex>&) override;
private:
/// determines whether the instance is already disposed
bool impl_isDisposed_nothrow(std::unique_lock<std::mutex>& /*rGuard*/) const { return m_pListener == nullptr; }
/// disposes the instance
void impl_dispose_nothrow(std::unique_lock<std::mutex>& rGuard);
/// registers or revokes the instance as listener at the global event broadcaster
void impl_listenerAction_nothrow( std::unique_lock<std::mutex>& rGuard, ListenerAction _eAction );
private:
DocumentEventListener* m_pListener;
Reference< XModel > m_xModel;
};
DocumentEventNotifier::Impl::Impl (DocumentEventListener& rListener, Reference<XModel> const& rxDocument) :
m_pListener(&rListener),
m_xModel(rxDocument)
{
std::unique_lock aGuard(m_aMutex);
osl_atomic_increment( &m_refCount );
impl_listenerAction_nothrow( aGuard, RegisterListener );
osl_atomic_decrement( &m_refCount );
}
DocumentEventNotifier::Impl::~Impl ()
{
disposeOnDestruct();
}
void SAL_CALL DocumentEventNotifier::Impl::documentEventOccured( const DocumentEvent& _rEvent )
{
std::unique_lock aGuard( m_aMutex );
OSL_PRECOND( !impl_isDisposed_nothrow(aGuard), "DocumentEventNotifier::Impl::notifyEvent: disposed, but still getting events?" );
if ( impl_isDisposed_nothrow(aGuard) )
return;
Reference< XModel > xDocument( _rEvent.Source, UNO_QUERY );
OSL_ENSURE( xDocument.is(), "DocumentEventNotifier::Impl::notifyEvent: illegal source document!" );
if ( !xDocument.is() )
return;
struct EventEntry
{
const char* pEventName;
void (DocumentEventListener::*listenerMethod)( const ScriptDocument& _rDocument );
};
static EventEntry const aEvents[] = {
{ "OnNew", &DocumentEventListener::onDocumentCreated },
{ "OnLoad", &DocumentEventListener::onDocumentOpened },
{ "OnSave", &DocumentEventListener::onDocumentSave },
{ "OnSaveDone", &DocumentEventListener::onDocumentSaveDone },
{ "OnSaveAs", &DocumentEventListener::onDocumentSaveAs },
{ "OnSaveAsDone", &DocumentEventListener::onDocumentSaveAsDone },
{ "OnUnload", &DocumentEventListener::onDocumentClosed },
{ "OnTitleChanged", &DocumentEventListener::onDocumentTitleChanged },
{ "OnModeChanged", &DocumentEventListener::onDocumentModeChanged }
};
for (EventEntry const & aEvent : aEvents)
{
if ( !_rEvent.EventName.equalsAscii( aEvent.pEventName ) )
continue;
// Listener implementations require that we hold the mutex, but to avoid lock ordering issues,
// we need to take the solar mutex before we take our own mutex.
aGuard.unlock();
// Listener implements require that we hold the solar mutex.
SolarMutexGuard aSolarGuard;
// Take the lock again, so we can check our local fields.
aGuard.lock();
if ( impl_isDisposed_nothrow(aGuard) )
// somebody took the chance to dispose us -> bail out
return;
DocumentEventListener* pListener = m_pListener;
ScriptDocument aDocument( xDocument );
// We cannot call the listener while holding our mutex because the listener
// call might trigger an event which call back into us.
aGuard.unlock();
(pListener->*aEvent.listenerMethod)( aDocument );
break;
}
}
void SAL_CALL DocumentEventNotifier::Impl::disposing( const css::lang::EventObject& /*Event*/ )
{
SolarMutexGuard aSolarGuard;
std::unique_lock aGuard( m_aMutex );
if ( !impl_isDisposed_nothrow(aGuard) )
impl_dispose_nothrow(aGuard);
}
void DocumentEventNotifier::Impl::disposing(std::unique_lock<std::mutex>& rGuard)
{
impl_listenerAction_nothrow( rGuard, RemoveListener );
impl_dispose_nothrow(rGuard);
}
void DocumentEventNotifier::Impl::impl_dispose_nothrow(std::unique_lock<std::mutex>& /*rGuard*/)
{
m_pListener = nullptr;
m_xModel.clear();
}
void DocumentEventNotifier::Impl::impl_listenerAction_nothrow( std::unique_lock<std::mutex>& rGuard, ListenerAction _eAction )
{
try
{
Reference< XDocumentEventBroadcaster > xBroadcaster;
if ( m_xModel.is() )
xBroadcaster.set( m_xModel, UNO_QUERY_THROW );
else
{
const Reference< css::uno::XComponentContext >& aContext(
comphelper::getProcessComponentContext() );
xBroadcaster = theGlobalEventBroadcaster::get(aContext);
}
void ( SAL_CALL XDocumentEventBroadcaster::*listenerAction )( const Reference< XDocumentEventListener >& ) =
( _eAction == RegisterListener ) ? &XDocumentEventBroadcaster::addDocumentEventListener : &XDocumentEventBroadcaster::removeDocumentEventListener;
rGuard.unlock();
(xBroadcaster.get()->*listenerAction)( this );
rGuard.lock();
}
catch( const Exception& )
{
DBG_UNHANDLED_EXCEPTION("basctl.basicide");
}
}
// DocumentEventNotifier
DocumentEventNotifier::DocumentEventNotifier (DocumentEventListener& rListener, Reference<XModel> const& rxDocument) :
m_pImpl(new Impl(rListener, rxDocument))
{ }
DocumentEventNotifier::DocumentEventNotifier (DocumentEventListener& rListener) :
m_pImpl(new Impl(rListener, Reference<XModel>()))
{ }
DocumentEventNotifier::~DocumentEventNotifier()
{
}
void DocumentEventNotifier::dispose()
{
m_pImpl->dispose();
}
// DocumentEventListener
DocumentEventListener::~DocumentEventListener()
{
}
} // namespace basctl
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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