svx/source/unodraw/unoshcol.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <com/sun/star/document/EventObject.hpp>
  21 #include <com/sun/star/lang/IndexOutOfBoundsException.hpp>
  22
  23 #include <cppuhelper/supportsservice.hxx>
  24 #include <osl/diagnose.h>
  25 #include <sal/log.hxx>
  26 #include <shapecollection.hxx>
  27
  28 using namespace ::com::sun::star;
  29 using namespace ::com::sun::star::uno;
  30
  31 SvxShapeCollection::SvxShapeCollection() noexcept
  32 {
  33 }
  34
  35 // XInterface
  36 void SvxShapeCollection::release() noexcept
  37 {
  38     uno::Reference< uno::XInterface > x( xDelegator );
  39     if (! x.is())
  40     {
  41         if (osl_atomic_decrement( &m_refCount ) == 0)
  42         {
  43             if (! bDisposed)
  44             {
  45                 uno::Reference< uno::XInterface > xHoldAlive( static_cast<uno::XWeak*>(this) );
  46                 // First dispose
  47                 try
  48                 {
  49                     dispose();
  50                 }
  51                 catch(css::uno::Exception&)
  52                 {
  53                     // release should not throw exceptions
  54                 }
  55
  56                 // only the alive ref holds the object
  57                 OSL_ASSERT( m_refCount == 1 );
  58                 // destroy the object if xHoldAlive decrement the refcount to 0
  59                 return;
  60             }
  61         }
  62         // restore the reference count
  63         osl_atomic_increment( &m_refCount );
  64     }
  65     OWeakAggObject::release();
  66 }
  67
  68 // XComponent
  69 void SvxShapeCollection::dispose()
  70 {
  71     // An frequently programming error is to release the last
  72     // reference to this object in the disposing message.
  73     // Make it robust, hold a self Reference.
  74     uno::Reference< lang::XComponent > xSelf( this );
  75
  76     // Guard dispose against multiple threading
  77     // Remark: It is an error to call dispose more than once
  78     bool bDoDispose = false;
  79     {
  80         std::unique_lock aGuard( m_aMutex );
  81         if( !bDisposed && !bInDispose )
  82         {
  83             // only one call go into this section
  84             bInDispose = true;
  85             bDoDispose = true;
  86         }
  87     }
  88
  89     // Do not hold the mutex because we are broadcasting
  90     if( bDoDispose )
  91     {
  92         // Create an event with this as sender
  93         try
  94         {
  95             uno::Reference< uno::XInterface > xSource( uno::Reference< uno::XInterface >::query( static_cast<lang::XComponent *>(this) ) );
  96             document::EventObject aEvt;
  97             aEvt.Source = xSource;
  98             // inform all listeners to release this object
  99             // The listener container are automatically cleared
 100             std::unique_lock g(m_aMutex);
 101             maEventListeners.disposeAndClear( g, aEvt );
 102             maShapeContainer.clear();
 103         }
 104         catch(const css::uno::Exception&)
 105         {
 106             // catch exception and throw again but signal that
 107             // the object was disposed. Dispose should be called
 108             // only once.
 109             bDisposed = true;
 110             bInDispose = false;
 111             throw;
 112         }
 113
 114         // the values bDispose and bInDisposing must set in this order.
 115         // No multithread call overcome the "!rBHelper.bDisposed && !rBHelper.bInDispose" guard.
 116         bDisposed = true;
 117         bInDispose = false;
 118     }
 119     else
 120     {
 121         // in a multithreaded environment, it can't be avoided, that dispose is called twice.
 122         // However this condition is traced, because it MAY indicate an error.
 123         SAL_INFO("svx", "dispose called twice" );
 124     }
 125 }
 126
 127 // XComponent
 128 void SAL_CALL SvxShapeCollection::addEventListener( const css::uno::Reference< css::lang::XEventListener >& aListener )
 129 {
 130     std::unique_lock g(m_aMutex);
 131     maEventListeners.addInterface( g, aListener );
 132 }
 133
 134 // XComponent
 135 void SAL_CALL SvxShapeCollection::removeEventListener( const css::uno::Reference< css::lang::XEventListener >& aListener )
 136 {
 137     std::unique_lock g(m_aMutex);
 138     maEventListeners.removeInterface( g, aListener );
 139 }
 140
 141 // XShapes
 142
 143 void SAL_CALL SvxShapeCollection::add( const Reference< drawing::XShape >& xShape )
 144 {
 145     std::unique_lock g(m_aMutex);
 146     maShapeContainer.push_back( xShape );
 147 }
 148
 149
 150 void SAL_CALL SvxShapeCollection::remove( const uno::Reference< drawing::XShape >& xShape )
 151 {
 152     std::unique_lock g(m_aMutex);
 153     maShapeContainer.erase(std::remove(maShapeContainer.begin(), maShapeContainer.end(), xShape), maShapeContainer.end());
 154 }
 155
 156
 157 sal_Int32 SAL_CALL SvxShapeCollection::getCount()
 158 {
 159     std::unique_lock g(m_aMutex);
 160     return maShapeContainer.size();
 161 }
 162
 163
 164 uno::Any SAL_CALL SvxShapeCollection::getByIndex( sal_Int32 Index )
 165 {
 166     if( Index < 0 || Index >= getCount() )
 167         throw lang::IndexOutOfBoundsException();
 168
 169     std::unique_lock g(m_aMutex);
 170     Reference<drawing::XShape> xShape = maShapeContainer[Index];
 171     return uno::Any( xShape );
 172 }
 173
 174 // XElementAccess
 175 uno::Type SAL_CALL SvxShapeCollection::getElementType()
 176 {
 177     return cppu::UnoType<drawing::XShape>::get();
 178 }
 179
 180 sal_Bool SAL_CALL SvxShapeCollection::hasElements()
 181 {
 182     return getCount() != 0;
 183 }
 184
 185 // XServiceInfo
 186 OUString SAL_CALL SvxShapeCollection::getImplementationName()
 187 {
 188     return "com.sun.star.drawing.SvxShapeCollection";
 189 }
 190
 191 sal_Bool SAL_CALL SvxShapeCollection::supportsService( const OUString& ServiceName )
 192 {
 193     return cppu::supportsService( this, ServiceName);
 194 }
 195
 196 uno::Sequence< OUString > SAL_CALL SvxShapeCollection::getSupportedServiceNames()
 197 {
 198     return { "com.sun.star.drawing.Shapes", "com.sun.star.drawing.ShapeCollection" };
 199 }
 200
 201 void SvxShapeCollection::getAllShapes(std::vector<css::uno::Reference<css::drawing::XShape>>& rShapes) const
 202 {
 203     rShapes = maShapeContainer;
 204 }
 205
 206 extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *
 207 com_sun_star_drawing_SvxShapeCollection_get_implementation(
 208     css::uno::XComponentContext *,
 209     css::uno::Sequence<css::uno::Any> const &)
 210 {
 211     return cppu::acquire(new SvxShapeCollection);
 212 }
 213
 214 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */