Line data    Source code

       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 <assert.h>
      21             : 
      22             : #include <tools/debug.hxx>
      23             : 
      24             : #include <svl/hint.hxx>
      25             : #include <svl/smplhint.hxx>
      26             : #include <svl/lstner.hxx>
      27             : 
      28             : #include <svl/brdcst.hxx>
      29             : #include <algorithm>
      30             : 
      31           0 : TYPEINIT0(SfxBroadcaster);
      32             : 
      33             : 
      34             : // broadcast immediately
      35             : 
      36           0 : void SfxBroadcaster::Broadcast( const SfxHint &rHint )
      37             : {
      38             :     // notify all registered listeners exactly once
      39           0 :     for (size_t n = 0; n < m_Listeners.size(); ++n)
      40             :     {
      41           0 :         SfxListener *const pListener = m_Listeners[n];
      42           0 :         if (pListener) {
      43           0 :             pListener->Notify( *this, rHint );
      44             :         }
      45             :     }
      46           0 : }
      47             : 
      48             : // unregister all listeners
      49             : 
      50           0 : SfxBroadcaster::~SfxBroadcaster()
      51             : {
      52           0 :     Broadcast( SfxSimpleHint(SFX_HINT_DYING) );
      53             : 
      54             :     // remove all still registered listeners
      55           0 :     for (size_t nPos = 0; nPos < m_Listeners.size(); ++nPos)
      56             :     {
      57           0 :         SfxListener *const pListener = m_Listeners[nPos];
      58           0 :         if (pListener) {
      59           0 :             pListener->RemoveBroadcaster_Impl(*this);
      60             :         }
      61             :     }
      62           0 : }
      63             : 
      64             : 
      65             : // simple ctor of class SfxBroadcaster
      66             : 
      67           0 : SfxBroadcaster::SfxBroadcaster()
      68             : {
      69           0 : }
      70             : 
      71             : 
      72             : // copy ctor of class SfxBroadcaster
      73             : 
      74             : 
      75           0 : SfxBroadcaster::SfxBroadcaster( const SfxBroadcaster &rBC )
      76             : {
      77           0 :     for (size_t n = 0; n < rBC.m_Listeners.size(); ++n)
      78             :     {
      79           0 :         SfxListener *const pListener = rBC.m_Listeners[n];
      80           0 :         if (pListener) {
      81           0 :             pListener->StartListening( *this );
      82             :         }
      83             :     }
      84           0 : }
      85             : 
      86             : 
      87             : // add a new SfxListener to the list
      88             : 
      89           0 : void SfxBroadcaster::AddListener( SfxListener& rListener )
      90             : {
      91           0 :     for (size_t i = 0; i < m_Listeners.size(); ++i)
      92             :     {
      93           0 :         if (!m_Listeners[i]) // removed by RemoveListener?
      94             :         {
      95           0 :             m_Listeners[i] = &rListener;
      96           0 :             return;
      97             :         }
      98             :     }
      99           0 :     m_Listeners.push_back(&rListener);
     100             : }
     101             : 
     102             : 
     103             : // called, if no more listeners exists
     104             : 
     105           0 : void SfxBroadcaster::ListenersGone()
     106             : {
     107           0 : }
     108             : 
     109             : 
     110             : // forward a notification to all registered listeners
     111             : 
     112           0 : void SfxBroadcaster::Forward(SfxBroadcaster& rBC, const SfxHint& rHint)
     113             : {
     114           0 :     for (size_t i = 0; i < m_Listeners.size(); ++i)
     115             :     {
     116           0 :         SfxListener *const pListener = m_Listeners[i];
     117           0 :         if (pListener) {
     118           0 :             pListener->Notify( rBC, rHint );
     119             :         }
     120             :     }
     121           0 : }
     122             : 
     123             : 
     124             : // remove one SfxListener from the list
     125             : 
     126           0 : void SfxBroadcaster::RemoveListener( SfxListener& rListener )
     127             : {
     128             :     SfxListenerArr_Impl::iterator aIter = std::find(
     129           0 :             m_Listeners.begin(), m_Listeners.end(), &rListener);
     130             :     assert(aIter != m_Listeners.end()); // "RemoveListener: Listener unknown"
     131             :     // DO NOT erase the listener, set the pointer to 0
     132             :     // because the current continuation may contain this->Broadcast
     133           0 :     *aIter = 0;
     134             : 
     135           0 :     if ( !HasListeners() )
     136           0 :         ListenersGone();
     137           0 : }
     138             : 
     139           0 : bool SfxBroadcaster::HasListeners() const
     140             : {
     141           0 :     for (size_t i = 0; i < m_Listeners.size(); ++i)
     142             :     {
     143           0 :         if (m_Listeners[i]) {
     144           0 :             return true;
     145             :         }
     146             :     }
     147           0 :     return false;
     148             : }
     149             : 
     150             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */