sc/source/ui/Accessibility/DrawModelBroadcaster.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 <DrawModelBroadcaster.hxx>
  21 #include <svx/svdmodel.hxx>
  22 #include <svx/unomod.hxx>
  23 #include <svx/svdobj.hxx>
  24
  25 using namespace ::com::sun::star;
  26
  27 ScDrawModelBroadcaster::ScDrawModelBroadcaster( SdrModel *pDrawModel ) :
  28     mpDrawModel( pDrawModel )
  29 {
  30     if (mpDrawModel)
  31         StartListening( *mpDrawModel );
  32 }
  33
  34 ScDrawModelBroadcaster::~ScDrawModelBroadcaster()
  35 {
  36     if (mpDrawModel)
  37         EndListening( *mpDrawModel );
  38 }
  39
  40 void SAL_CALL ScDrawModelBroadcaster::addEventListener( const uno::Reference< document::XEventListener >& xListener )
  41 {
  42     std::unique_lock aGuard(maListenerMutex);
  43     maEventListeners.addInterface( aGuard, xListener );
  44 }
  45
  46 void SAL_CALL ScDrawModelBroadcaster::removeEventListener( const uno::Reference< document::XEventListener >& xListener )
  47 {
  48     std::unique_lock aGuard(maListenerMutex);
  49     maEventListeners.removeInterface( aGuard, xListener );
  50 }
  51
  52 void SAL_CALL ScDrawModelBroadcaster::addShapeEventListener(
  53                 const css::uno::Reference< css::drawing::XShape >& xShape,
  54                 const uno::Reference< document::XShapeEventListener >& xListener )
  55 {
  56     assert(xShape.is() && "no shape?");
  57     std::scoped_lock aGuard(maListenerMutex);
  58     auto rv = maShapeListeners.emplace(xShape, xListener);
  59     assert(rv.second && "duplicate listener?");
  60     (void)rv;
  61 }
  62
  63 void SAL_CALL ScDrawModelBroadcaster::removeShapeEventListener(
  64                 const css::uno::Reference< css::drawing::XShape >& xShape,
  65                 const uno::Reference< document::XShapeEventListener >& xListener )
  66 {
  67     std::scoped_lock aGuard(maListenerMutex);
  68     auto it = maShapeListeners.find(xShape);
  69     if (it != maShapeListeners.end())
  70     {
  71         assert(it->second == xListener && "removing wrong listener?");
  72         (void)xListener;
  73         maShapeListeners.erase(it);
  74     }
  75 }
  76
  77 void ScDrawModelBroadcaster::Notify( SfxBroadcaster&,
  78         const SfxHint& rHint )
  79 {
  80     if (rHint.GetId() != SfxHintId::ThisIsAnSdrHint)
  81         return;
  82     const SdrHint* pSdrHint = static_cast<const SdrHint*>(&rHint);
  83
  84     document::EventObject aEvent;
  85     if( !SvxUnoDrawMSFactory::createEvent( mpDrawModel, pSdrHint, aEvent ) )
  86         return;
  87
  88     std::unique_lock aGuard(maListenerMutex);
  89     maEventListeners.forEach(aGuard,
  90         [&aEvent](const css::uno::Reference<document::XEventListener>& xListener)
  91         {
  92             xListener->notifyEvent(aEvent);
  93         }
  94     );
  95
  96     // right now, we're only handling the specific event necessary to fix this performance problem
  97     if (pSdrHint->GetKind() == SdrHintKind::ObjectChange)
  98     {
  99         auto pSdrObject = const_cast<SdrObject*>(pSdrHint->GetObject());
 100         uno::Reference<drawing::XShape> xShape(pSdrObject->getUnoShape(), uno::UNO_QUERY);
 101         auto it = maShapeListeners.find(xShape);
 102         if (it != maShapeListeners.end())
 103             it->second->notifyShapeEvent(aEvent);
 104     }
 105 }
 106
 107 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */