svl/source/notify/listener.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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   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 <svl/listener.hxx>
  21 #include <svl/broadcast.hxx>
  22
  23 SvtListener::QueryBase::QueryBase( sal_uInt16 nId ) : mnId(nId) {}
  24 SvtListener::QueryBase::~QueryBase() {}
  25
  26 sal_uInt16 SvtListener::QueryBase::getId() const
  27 {
  28     return mnId;
  29 }
  30
  31 SvtListener::SvtListener() {}
  32
  33 SvtListener::SvtListener( const SvtListener & )  {}
  34
  35 SvtListener::~SvtListener() COVERITY_NOEXCEPT_FALSE
  36 {
  37     // Unregister itself from all broadcasters it's listening to.
  38     EndListeningAll();
  39 }
  40
  41 // registers at a specific SvtBroadcaster
  42
  43 bool SvtListener::StartListening( SvtBroadcaster& rBroadcaster )
  44 {
  45     std::pair<BroadcastersType::const_iterator, bool> r =
  46         maBroadcasters.insert(&rBroadcaster);
  47     if (r.second)
  48     {
  49         // This is a new broadcaster.
  50         rBroadcaster.Add(this);
  51     }
  52     return r.second;
  53 }
  54
  55 bool SvtListener::EndListening( SvtBroadcaster& rBroadcaster )
  56 {
  57     BroadcastersType::const_iterator it = maBroadcasters.find(&rBroadcaster);
  58     if (it == maBroadcasters.end())
  59         // Not listening to this broadcaster.
  60         return false;
  61
  62     rBroadcaster.Remove(this);
  63     maBroadcasters.erase(it);
  64     return true;
  65 }
  66
  67 // called from the SvtBroadcaster destructor, used to avoid calling
  68 // back into the broadcaster again
  69 void SvtListener::BroadcasterDying( SvtBroadcaster& rBroadcaster )
  70 {
  71     BroadcastersType::const_iterator it = maBroadcasters.find(&rBroadcaster);
  72     if (it != maBroadcasters.end())
  73         maBroadcasters.erase(it);
  74 }
  75
  76 void SvtListener::EndListeningAll()
  77 {
  78     for (SvtBroadcaster* p : maBroadcasters)
  79     {
  80         SvtBroadcaster& rBC = *p;
  81         rBC.Remove(this);
  82     }
  83     maBroadcasters.clear();
  84 }
  85
  86
  87 void SvtListener::CopyAllBroadcasters( const SvtListener& r )
  88 {
  89     EndListeningAll();
  90     BroadcastersType aCopy(r.maBroadcasters);
  91     maBroadcasters.swap(aCopy);
  92     for (SvtBroadcaster* p : maBroadcasters)
  93     {
  94         p->Add(this);
  95     }
  96 }
  97
  98 bool SvtListener::HasBroadcaster() const
  99 {
 100     return !maBroadcasters.empty();
 101 }
 102
 103 void SvtListener::Notify( const SfxHint& /*rHint*/ ) {}
 104
 105 void SvtListener::Query( QueryBase& /*rQuery*/ ) const {}
 106
 107
 108 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */