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 <svl/hint.hxx>
      23             : #include <svl/smplhint.hxx>
      24             : #include <svl/lstner.hxx>
      25             : 
      26             : #include <svl/SfxBroadcaster.hxx>
      27             : #include <algorithm>
      28             : #include <tools/debug.hxx>
      29             : 
      30      367610 : TYPEINIT0(SfxBroadcaster);
      31             : 
      32             : // broadcast immediately
      33             : 
      34     2321580 : void SfxBroadcaster::Broadcast( const SfxHint &rHint )
      35             : {
      36             :     // notify all registered listeners exactly once
      37    19687942 :     for (size_t n = 0; n < m_Listeners.size(); ++n)
      38             :     {
      39    17366362 :         SfxListener *const pListener = m_Listeners[n];
      40    17366362 :         if (pListener) {
      41    12973293 :             pListener->Notify( *this, rHint );
      42             :         }
      43             :     }
      44     2321580 : }
      45             : 
      46             : // unregister all listeners
      47             : 
      48     1655252 : SfxBroadcaster::~SfxBroadcaster()
      49             : {
      50      725031 :     Broadcast( SfxSimpleHint(SFX_HINT_DYING) );
      51             : 
      52             :     // remove all still registered listeners
      53     1196558 :     for (size_t nPos = 0; nPos < m_Listeners.size(); ++nPos)
      54             :     {
      55      471527 :         SfxListener *const pListener = m_Listeners[nPos];
      56      471527 :         if (pListener) {
      57       54056 :             pListener->RemoveBroadcaster_Impl(*this);
      58             :         }
      59             :     }
      60      930221 : }
      61             : 
      62             : 
      63             : // simple ctor of class SfxBroadcaster
      64             : 
      65      741275 : SfxBroadcaster::SfxBroadcaster()
      66             : {
      67      741275 : }
      68             : 
      69             : 
      70             : // copy ctor of class SfxBroadcaster
      71             : 
      72             : 
      73           0 : SfxBroadcaster::SfxBroadcaster( const SfxBroadcaster &rBC )
      74             : {
      75           0 :     for (size_t n = 0; n < rBC.m_Listeners.size(); ++n)
      76             :     {
      77           0 :         SfxListener *const pListener = rBC.m_Listeners[n];
      78           0 :         if (pListener) {
      79           0 :             pListener->StartListening( *this );
      80             :         }
      81             :     }
      82           0 : }
      83             : 
      84             : 
      85             : // add a new SfxListener to the list
      86             : 
      87     1033249 : void SfxBroadcaster::AddListener( SfxListener& rListener )
      88             : {
      89             :     DBG_TESTSOLARMUTEX();
      90     1033249 :     if (m_RemovedPositions.empty()) {
      91      487284 :         m_Listeners.push_back(&rListener);
      92             :     }
      93             :     else {
      94      545965 :         size_t targetPosition = m_RemovedPositions.back();
      95      545965 :         m_RemovedPositions.pop_back();
      96             :         assert(m_Listeners[targetPosition] == NULL);
      97      545965 :         m_Listeners[targetPosition] = &rListener;
      98             :     }
      99     1033249 : }
     100             : 
     101             : 
     102             : // called, if no more listeners exists
     103             : 
     104      258628 : void SfxBroadcaster::ListenersGone()
     105             : {
     106      258628 : }
     107             : 
     108             : 
     109             : // forward a notification to all registered listeners
     110             : 
     111     2126880 : void SfxBroadcaster::Forward(SfxBroadcaster& rBC, const SfxHint& rHint)
     112             : {
     113     3924922 :     for (size_t i = 0; i < m_Listeners.size(); ++i)
     114             :     {
     115     1798042 :         SfxListener *const pListener = m_Listeners[i];
     116     1798042 :         if (pListener) {
     117     1710578 :             pListener->Notify( rBC, rHint );
     118             :         }
     119             :     }
     120     2126880 : }
     121             : 
     122             : 
     123             : // remove one SfxListener from the list
     124             : 
     125      964671 : void SfxBroadcaster::RemoveListener( SfxListener& rListener )
     126             : {
     127             :     DBG_TESTSOLARMUTEX();
     128             :     SfxListenerArr_Impl::iterator aIter = std::find(
     129      964671 :             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      964671 :     *aIter = 0;
     134      964671 :     size_t positionOfRemovedElement = std::distance(m_Listeners.begin(), aIter);
     135      964671 :     m_RemovedPositions.push_back(positionOfRemovedElement);
     136             : 
     137      964671 :     if ( !HasListeners() )
     138      258628 :         ListenersGone();
     139      964671 : }
     140             : 
     141      968962 : bool SfxBroadcaster::HasListeners() const
     142             : {
     143      968962 :     return (GetListenerCount() != 0);
     144             : }
     145             : 
     146      968974 : size_t SfxBroadcaster::GetListenerCount() const
     147             : {
     148             :     assert(m_Listeners.size() >= m_RemovedPositions.size());
     149      968974 :     return m_Listeners.size() - m_RemovedPositions.size();
     150             : }
     151             : 
     152             : 
     153             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */