1 /**************************************************************
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 *
20 *************************************************************/
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 "listenerbase.hxx"
29 #include <svl/listeneriter.hxx>
30 #include <svl/listener.hxx>
31 #include <svl/broadcast.hxx>
32
33
SvtListenerBase(SvtListener & rLst,SvtBroadcaster & rBroadcaster)34 SvtListenerBase::SvtListenerBase( SvtListener& rLst,
35 SvtBroadcaster& rBroadcaster )
36 : pLeft( 0 ), pRight( 0 ),
37 pBroadcaster( &rBroadcaster ), pListener( &rLst )
38 {
39 pNext = rLst.pBrdCastLst;
40 rLst.pBrdCastLst = this;
41
42 if( pBroadcaster->pRoot )
43 {
44 // set ever behind the root
45 pRight = pBroadcaster->pRoot->pRight;
46 pBroadcaster->pRoot->pRight = this;
47 this->pLeft = pBroadcaster->pRoot;
48 if( pRight )
49 pRight->pLeft = this;
50 }
51 else
52 pBroadcaster->pRoot = this;
53 }
54
~SvtListenerBase()55 SvtListenerBase::~SvtListenerBase()
56 {
57 SvtListenerBase *pR = pRight, *pL = pLeft;
58 if( pBroadcaster->pRoot )
59 pBroadcaster->pRoot = pL ? pL : pR;
60
61 if( pL )
62 pL->pRight = pR;
63 if( pR )
64 pR->pLeft = pL;
65
66 SvtListenerIter::RemoveListener( *this, pR );
67
68 if( !pBroadcaster->pRoot )
69 pBroadcaster->ListenersGone();
70 }
71
72
73