vcl/source/app/vclevent.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
  21 #include "vcl/vclevent.hxx"
  22
  23 #include "svdata.hxx"
  24
  25 #include <com/sun/star/accessibility/XAccessible.hpp>
  26
  27 using ::com::sun::star::uno::Reference;
  28 using ::com::sun::star::accessibility::XAccessible;
  29
  30 TYPEINIT0(VclSimpleEvent);
  31 TYPEINIT1(VclWindowEvent, VclSimpleEvent);
  32 TYPEINIT1(VclMenuEvent, VclSimpleEvent);
  33
  34 VclAccessibleEvent::VclAccessibleEvent( sal_uLong n, const Reference<XAccessible>& rxAccessible ) :
  35     VclSimpleEvent(n),
  36     mxAccessible(rxAccessible)
  37 {
  38 }
  39
  40 VclAccessibleEvent::~VclAccessibleEvent()
  41 {
  42 }
  43
  44 Reference<XAccessible> VclAccessibleEvent::GetAccessible() const
  45 {
  46     return mxAccessible;
  47 }
  48
  49 void VclEventListeners::Call( VclSimpleEvent* pEvent ) const
  50 {
  51     if ( m_aListeners.empty() )
  52         return;
  53
  54     // Copy the list, because this can be destroyed when calling a Link...
  55     std::list<Link> aCopy( m_aListeners );
  56     std::list<Link>::iterator aIter( aCopy.begin() );
  57     std::list<Link>::const_iterator aEnd( aCopy.end() );
  58     if( pEvent->IsA( VclWindowEvent::StaticType() ) )
  59     {
  60         VclWindowEvent* pWinEvent = static_cast<VclWindowEvent*>(pEvent);
  61         ImplDelData aDel( pWinEvent->GetWindow() );
  62         while ( aIter != aEnd && ! aDel.IsDead() )
  63         {
  64             Link &rLink = *aIter;
  65             // check this hasn't been removed in some re-enterancy scenario fdo#47368
  66             if( std::find(m_aListeners.begin(), m_aListeners.end(), rLink) != m_aListeners.end() )
  67                 rLink.Call( pEvent );
  68             ++aIter;
  69         }
  70     }
  71     else
  72     {
  73         while ( aIter != aEnd )
  74         {
  75             Link &rLink = *aIter;
  76             if( std::find(m_aListeners.begin(), m_aListeners.end(), rLink) != m_aListeners.end() )
  77                 rLink.Call( pEvent );
  78             ++aIter;
  79         }
  80     }
  81 }
  82
  83 sal_Bool VclEventListeners::Process( VclSimpleEvent* pEvent ) const
  84 {
  85     if ( m_aListeners.empty() )
  86         return sal_False;
  87
  88     sal_Bool bProcessed = sal_False;
  89     // Copy the list, because this can be destroyed when calling a Link...
  90     std::list<Link> aCopy( m_aListeners );
  91     std::list<Link>::iterator aIter( aCopy.begin() );
  92     std::list<Link>::const_iterator aEnd( aCopy.end() );
  93     while ( aIter != aEnd )
  94     {
  95         if( (*aIter).Call( pEvent ) != 0 )
  96         {
  97             bProcessed = sal_True;
  98             break;
  99         }
 100         ++aIter;
 101     }
 102     return bProcessed;
 103 }
 104
 105 void VclEventListeners::addListener( const Link& rListener )
 106 {
 107     m_aListeners.push_back( rListener );
 108 }
 109
 110 void VclEventListeners::removeListener( const Link& rListener )
 111 {
 112     m_aListeners.remove( rListener );
 113 }
 114
 115 VclEventListeners2::VclEventListeners2()
 116 {
 117 }
 118
 119 VclEventListeners2::~VclEventListeners2()
 120 {
 121 }
 122
 123 void VclEventListeners2::addListener( const Link& i_rLink )
 124 {
 125     // ensure uniqueness
 126     for( std::list< Link >::const_iterator it = m_aListeners.begin(); it != m_aListeners.end(); ++it )
 127     {
 128         if( *it == i_rLink )
 129             return;
 130     }
 131     m_aListeners.push_back( i_rLink );
 132 }
 133
 134 void VclEventListeners2::removeListener( const Link& i_rLink )
 135 {
 136     size_t n = m_aIterators.size();
 137     for( size_t i = 0; i < n; i++ )
 138     {
 139         if( m_aIterators[i].m_aIt != m_aListeners.end() && *m_aIterators[i].m_aIt == i_rLink )
 140         {
 141             m_aIterators[i].m_bWasInvalidated = true;
 142             ++m_aIterators[i].m_aIt;
 143         }
 144     }
 145     m_aListeners.remove( i_rLink );
 146 }
 147
 148 void VclEventListeners2::callListeners( VclSimpleEvent* i_pEvent )
 149 {
 150     vcl::DeletionListener aDel( this );
 151
 152     m_aIterators.push_back(ListenerIt(m_aListeners.begin()));
 153     size_t nIndex = m_aIterators.size() - 1;
 154     while( ! aDel.isDeleted() && m_aIterators[ nIndex ].m_aIt != m_aListeners.end() )
 155     {
 156         m_aIterators[ nIndex ].m_aIt->Call( i_pEvent );
 157         if( m_aIterators[ nIndex ].m_bWasInvalidated )
 158             // check if the current element was removed and the iterator increased in the meantime
 159             m_aIterators[ nIndex ].m_bWasInvalidated = false;
 160         else
 161             ++m_aIterators[ nIndex ].m_aIt;
 162     }
 163     m_aIterators.pop_back();
 164 }
 165
 166 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */