svl/source/notify/listener.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
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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 #include <cassert>
  23
  24 SvtListener::QueryBase::QueryBase( sal_uInt16 nId ) : mnId(nId) {}
  25 SvtListener::QueryBase::~QueryBase() {}
  26
  27 sal_uInt16 SvtListener::QueryBase::getId() const
  28 {
  29     return mnId;
  30 }
  31
  32 SvtListener::SvtListener() {}
  33
  34 SvtListener::SvtListener( const SvtListener & )  {}
  35
  36 SvtListener::~SvtListener() COVERITY_NOEXCEPT_FALSE
  37 {
  38     // Unregister itself from all broadcasters it's listening to.
  39     EndListeningAll();
  40 }
  41
  42 // registers at a specific SvtBroadcaster
  43
  44 bool SvtListener::StartListening( SvtBroadcaster& rBroadcaster )
  45 {
  46     std::pair<BroadcastersType::const_iterator, bool> r =
  47         maBroadcasters.insert(&rBroadcaster);
  48     if (r.second)
  49     {
  50         // This is a new broadcaster.
  51         rBroadcaster.Add(this);
  52     }
  53     return r.second;
  54 }
  55
  56 bool SvtListener::EndListening( SvtBroadcaster& rBroadcaster )
  57 {
  58     BroadcastersType::const_iterator it = maBroadcasters.find(&rBroadcaster);
  59     if (it == maBroadcasters.end())
  60         // Not listening to this broadcaster.
  61         return false;
  62
  63     rBroadcaster.Remove(this);
  64     maBroadcasters.erase(it);
  65     return true;
  66 }
  67
  68 // called from the SvtBroadcaster destructor, used to avoid calling
  69 // back into the broadcaster again
  70 void SvtListener::BroadcasterDying( SvtBroadcaster& rBroadcaster )
  71 {
  72     BroadcastersType::const_iterator it = maBroadcasters.find(&rBroadcaster);
  73     if (it != maBroadcasters.end())
  74         maBroadcasters.erase(it);
  75 }
  76
  77 void SvtListener::EndListeningAll()
  78 {
  79     for (SvtBroadcaster* p : maBroadcasters)
  80     {
  81         SvtBroadcaster& rBC = *p;
  82         rBC.Remove(this);
  83     }
  84     maBroadcasters.clear();
  85 }
  86
  87
  88 void SvtListener::CopyAllBroadcasters( const SvtListener& r )
  89 {
  90     EndListeningAll();
  91     BroadcastersType aCopy(r.maBroadcasters);
  92     maBroadcasters.swap(aCopy);
  93     for (SvtBroadcaster* p : maBroadcasters)
  94     {
  95         p->Add(this);
  96     }
  97 }
  98
  99 bool SvtListener::HasBroadcaster() const
 100 {
 101     return !maBroadcasters.empty();
 102 }
 103
 104 void SvtListener::Notify( const SfxHint& /*rHint*/ ) {}
 105
 106 void SvtListener::Query( QueryBase& /*rQuery*/ ) const {}
 107
 108
 109 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */