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2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
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15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
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18 * under the License.
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21
22
23
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_svl.hxx"
26
27 #include <tools/debug.hxx>
28 #include <svl/broadcast.hxx>
29 #include <svl/listener.hxx>
30 #include "listenerbase.hxx"
31 #include <svl/listeneriter.hxx>
32
33
34 //====================================================================
35 TYPEINIT0(SvtListener);
36
37 //====================================================================
38 // simple ctor of class SvtListener
39
SvtListener()40 SvtListener::SvtListener()
41 : pBrdCastLst( 0 )
42 {
43 }
44 //--------------------------------------------------------------------
45
46 // copy ctor of class SvtListener
47
SvtListener(const SvtListener & rListener)48 SvtListener::SvtListener( const SvtListener &rListener )
49 : pBrdCastLst( 0 )
50 {
51 SvtListenerBase* pLst = rListener.pBrdCastLst;
52 while( pLst )
53 {
54 new SvtListenerBase( *this, *pLst->GetBroadcaster() );
55 pLst = pLst->GetNext();
56 }
57 }
58 //--------------------------------------------------------------------
59
60 // unregisteres the SvtListener from its SvtBroadcasters
61
~SvtListener()62 SvtListener::~SvtListener()
63 {
64 EndListeningAll();
65 }
66
67 //--------------------------------------------------------------------
68
69 // registeres at a specific SvtBroadcaster
70
StartListening(SvtBroadcaster & rBroadcaster)71 sal_Bool SvtListener::StartListening( SvtBroadcaster& rBroadcaster )
72 {
73 const SvtListenerBase* pLst = pBrdCastLst;
74 while( pLst )
75 {
76 if( &rBroadcaster == pLst->GetBroadcaster() )
77 {
78 // double, than return
79 return sal_False;
80 }
81 pLst = pLst->GetNext();
82 }
83 new SvtListenerBase( *this, rBroadcaster );
84 return sal_True;
85 }
86
87 //--------------------------------------------------------------------
88
89 // unregisteres at a specific SvtBroadcaster
90
EndListening(SvtBroadcaster & rBroadcaster)91 sal_Bool SvtListener::EndListening( SvtBroadcaster& rBroadcaster )
92 {
93 SvtListenerBase *pLst = pBrdCastLst, *pPrev = pLst;
94 while( pLst )
95 {
96 if( &rBroadcaster == pLst->GetBroadcaster() )
97 {
98 if( pBrdCastLst == pLst )
99 pBrdCastLst = pLst->GetNext();
100 else
101 pPrev->SetNext( pLst->GetNext() );
102
103 delete pLst;
104 return sal_True;
105 }
106 pPrev = pLst;
107 pLst = pLst->GetNext();
108 }
109 return sal_False;
110 }
111
112 //--------------------------------------------------------------------
113
114 // unregisteres all Broadcasters
115
EndListeningAll()116 void SvtListener::EndListeningAll()
117 {
118 SvtListenerBase *pLst = pBrdCastLst;
119 while( pLst )
120 {
121 SvtListenerBase *pDel = pLst;
122 pLst = pLst->GetNext();
123
124 delete pDel;
125 }
126 pBrdCastLst = 0;
127 }
128
129 //--------------------------------------------------------------------
130
IsListening(SvtBroadcaster & rBroadcaster) const131 sal_Bool SvtListener::IsListening( SvtBroadcaster& rBroadcaster ) const
132 {
133 const SvtListenerBase *pLst = pBrdCastLst;
134 while( pLst )
135 {
136 if( &rBroadcaster == pLst->GetBroadcaster() )
137 break;
138 pLst = pLst->GetNext();
139 }
140 return 0 != pLst;
141 }
142
143 //--------------------------------------------------------------------
144
145 // base implementation of notification handler
146
Notify(SvtBroadcaster & rBC,const SfxHint &)147 void SvtListener::Notify( SvtBroadcaster&
148 #ifdef DBG_UTIL
149 rBC
150 #endif
151 , const SfxHint& )
152 {
153 DBG_ASSERT( IsListening( rBC ),
154 "notification from unregistered broadcaster" );
155 }
156
157
158