diff options
Diffstat (limited to 'svx/source/unodraw/unoshcol.cxx')
| -rw-r--r-- | svx/source/unodraw/unoshcol.cxx | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/svx/source/unodraw/unoshcol.cxx b/svx/source/unodraw/unoshcol.cxx new file mode 100644 index 000000000..105ca6523 --- /dev/null +++ b/svx/source/unodraw/unoshcol.cxx @@ -0,0 +1,252 @@ +/* -*- 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: */ |