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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 <com/sun/star/document/EventObject.hpp>
#include <com/sun/star/drawing/XShapes.hpp>
#include <com/sun/star/lang/IndexOutOfBoundsException.hpp>
#include <com/sun/star/lang/XComponent.hpp>
#include <com/sun/star/lang/XServiceInfo.hpp>
#include <com/sun/star/uno/XComponentContext.hpp>
#include <cppuhelper/basemutex.hxx>
#include <cppuhelper/implbase3.hxx>
#include <cppuhelper/interfacecontainer.hxx>
#include <comphelper/interfacecontainer3.hxx>
#include <cppuhelper/supportsservice.hxx>
#include <osl/mutex.hxx>
#include <sal/log.hxx>
using namespace ::com::sun::star;
using namespace ::com::sun::star::uno;
namespace {
class SvxShapeCollection :
public cppu::BaseMutex,
public cppu::WeakAggImplHelper3<drawing::XShapes, lang::XServiceInfo, lang::XComponent>
{
private:
comphelper::OInterfaceContainerHelper3<drawing::XShape> maShapeContainer;
cppu::OBroadcastHelper mrBHelper;
public:
SvxShapeCollection() noexcept;
// XInterface
virtual void SAL_CALL release() noexcept override;
// XComponent
virtual void SAL_CALL dispose() override;
virtual void SAL_CALL addEventListener( const css::uno::Reference< css::lang::XEventListener >& aListener ) override;
virtual void SAL_CALL removeEventListener( const css::uno::Reference< css::lang::XEventListener >& aListener ) override;
// XIndexAccess
virtual sal_Int32 SAL_CALL getCount() override ;
virtual css::uno::Any SAL_CALL getByIndex( sal_Int32 Index ) override;
// XElementAccess
virtual css::uno::Type SAL_CALL getElementType() override;
virtual sal_Bool SAL_CALL hasElements() override;
// XShapes
virtual void SAL_CALL add( const css::uno::Reference< css::drawing::XShape >& xShape ) override;
virtual void SAL_CALL remove( const css::uno::Reference< css::drawing::XShape >& xShape ) override;
// XServiceInfo
virtual OUString SAL_CALL getImplementationName() override;
virtual sal_Bool SAL_CALL supportsService( const OUString& ServiceName ) override;
virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
};
SvxShapeCollection::SvxShapeCollection() noexcept
: maShapeContainer( m_aMutex ), mrBHelper( m_aMutex )
{
}
// XInterface
void SvxShapeCollection::release() noexcept
{
uno::Reference< uno::XInterface > x( xDelegator );
if (! x.is())
{
if (osl_atomic_decrement( &m_refCount ) == 0)
{
if (! mrBHelper.bDisposed)
{
uno::Reference< uno::XInterface > xHoldAlive( static_cast<uno::XWeak*>(this) );
// First dispose
try
{
dispose();
}
catch(css::uno::Exception&)
{
// release should not throw exceptions
}
// only the alive ref holds the object
OSL_ASSERT( m_refCount == 1 );
// destroy the object if xHoldAlive decrement the refcount to 0
return;
}
}
// restore the reference count
osl_atomic_increment( &m_refCount );
}
OWeakAggObject::release();
}
// XComponent
void SvxShapeCollection::dispose()
{
// An frequently programming error is to release the last
// reference to this object in the disposing message.
// Make it robust, hold a self Reference.
uno::Reference< lang::XComponent > xSelf( this );
// Guard dispose against multiple threading
// Remark: It is an error to call dispose more than once
bool bDoDispose = false;
{
osl::MutexGuard aGuard( mrBHelper.rMutex );
if( !mrBHelper.bDisposed && !mrBHelper.bInDispose )
{
// only one call go into this section
mrBHelper.bInDispose = true;
bDoDispose = true;
}
}
// Do not hold the mutex because we are broadcasting
if( bDoDispose )
{
// Create an event with this as sender
try
{
uno::Reference< uno::XInterface > xSource( uno::Reference< uno::XInterface >::query( static_cast<lang::XComponent *>(this) ) );
document::EventObject aEvt;
aEvt.Source = xSource;
// inform all listeners to release this object
// The listener container are automatically cleared
mrBHelper.aLC.disposeAndClear( aEvt );
maShapeContainer.clear();
}
catch(const css::uno::Exception&)
{
// catch exception and throw again but signal that
// the object was disposed. Dispose should be called
// only once.
mrBHelper.bDisposed = true;
mrBHelper.bInDispose = false;
throw;
}
// the values bDispose and bInDisposing must set in this order.
// No multithread call overcome the "!rBHelper.bDisposed && !rBHelper.bInDispose" guard.
mrBHelper.bDisposed = true;
mrBHelper.bInDispose = false;
}
else
{
// in a multithreaded environment, it can't be avoided, that dispose is called twice.
// However this condition is traced, because it MAY indicate an error.
SAL_INFO("svx", "dispose called twice" );
}
}
// XComponent
void SAL_CALL SvxShapeCollection::addEventListener( const css::uno::Reference< css::lang::XEventListener >& aListener )
{
mrBHelper.addListener( cppu::UnoType<decltype(aListener)>::get() , aListener );
}
// XComponent
void SAL_CALL SvxShapeCollection::removeEventListener( const css::uno::Reference< css::lang::XEventListener >& aListener )
{
mrBHelper.removeListener( cppu::UnoType<decltype(aListener)>::get() , aListener );
}
// XShapes
void SAL_CALL SvxShapeCollection::add( const Reference< drawing::XShape >& xShape )
{
maShapeContainer.addInterface( xShape );
}
void SAL_CALL SvxShapeCollection::remove( const uno::Reference< drawing::XShape >& xShape )
{
maShapeContainer.removeInterface( xShape );
}
sal_Int32 SAL_CALL SvxShapeCollection::getCount()
{
return maShapeContainer.getLength();
}
uno::Any SAL_CALL SvxShapeCollection::getByIndex( sal_Int32 Index )
{
if( Index < 0 || Index >= getCount() )
throw lang::IndexOutOfBoundsException();
Reference<drawing::XShape> xShape = maShapeContainer.getInterface(Index);
return uno::Any( xShape );
}
// XElementAccess
uno::Type SAL_CALL SvxShapeCollection::getElementType()
{
return cppu::UnoType<drawing::XShape>::get();
}
sal_Bool SAL_CALL SvxShapeCollection::hasElements()
{
return getCount() != 0;
}
// XServiceInfo
OUString SAL_CALL SvxShapeCollection::getImplementationName()
{
return "com.sun.star.drawing.SvxShapeCollection";
}
sal_Bool SAL_CALL SvxShapeCollection::supportsService( const OUString& ServiceName )
{
return cppu::supportsService( this, ServiceName);
}
uno::Sequence< OUString > SAL_CALL SvxShapeCollection::getSupportedServiceNames()
{
return { "com.sun.star.drawing.Shapes", "com.sun.star.drawing.ShapeCollection" };
}
}
extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *
com_sun_star_drawing_SvxShapeCollection_get_implementation(
css::uno::XComponentContext *,
css::uno::Sequence<css::uno::Any> const &)
{
return cppu::acquire(new SvxShapeCollection);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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