unoshcol.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
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 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
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#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);
}
 
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