forms/source/helper/controlfeatureinterception.cxx

   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 "controlfeatureinterception.hxx"
  21 #include "urltransformer.hxx"
  22 #include <osl/diagnose.h>
  23
  24
  25 namespace frm
  26 {
  27
  28
  29     using namespace ::com::sun::star::uno;
  30     using namespace ::com::sun::star::frame;
  31     using namespace ::com::sun::star::util;
  32     using namespace ::com::sun::star::lang;
  33
  34     ControlFeatureInterception::ControlFeatureInterception( const Reference< XComponentContext >& _rxORB )
  35         :m_pUrlTransformer( new UrlTransformer( _rxORB ) )
  36     {
  37     }
  38
  39
  40     void SAL_CALL ControlFeatureInterception::registerDispatchProviderInterceptor( const Reference< XDispatchProviderInterceptor >& _rxInterceptor ) throw (RuntimeException )
  41     {
  42         if ( !_rxInterceptor.is() )
  43         {
  44             OSL_FAIL( "ControlFeatureInterception::registerDispatchProviderInterceptor: invalid interceptor!" );
  45             return;
  46         }
  47
  48         if ( m_xFirstDispatchInterceptor.is() )
  49         {
  50             // there is already an interceptor; the new one will become its master
  51             Reference< XDispatchProvider > xFirstProvider( m_xFirstDispatchInterceptor, UNO_QUERY );
  52             _rxInterceptor->setSlaveDispatchProvider( xFirstProvider );
  53             m_xFirstDispatchInterceptor->setMasterDispatchProvider( xFirstProvider );
  54         }
  55
  56         // we are the master of the chain's first interceptor
  57         m_xFirstDispatchInterceptor = _rxInterceptor;
  58         m_xFirstDispatchInterceptor->setMasterDispatchProvider( NULL );
  59             // it's the first of the interceptor chain
  60     }
  61
  62
  63     void SAL_CALL ControlFeatureInterception::releaseDispatchProviderInterceptor( const Reference< XDispatchProviderInterceptor >& _rxInterceptor ) throw (RuntimeException )
  64     {
  65         if ( !_rxInterceptor.is() )
  66         {
  67             OSL_FAIL( "ControlFeatureInterception::releaseDispatchProviderInterceptor: invalid interceptor!" );
  68             return;
  69         }
  70
  71         Reference< XDispatchProviderInterceptor >  xChainWalk( m_xFirstDispatchInterceptor );
  72
  73         if ( m_xFirstDispatchInterceptor == _rxInterceptor )
  74         {   // our chain will have a new first element
  75             Reference< XDispatchProviderInterceptor >  xSlave( m_xFirstDispatchInterceptor->getSlaveDispatchProvider(), UNO_QUERY );
  76             m_xFirstDispatchInterceptor = xSlave;
  77         }
  78         // do this before removing the interceptor from the chain as we won't know it's slave afterwards)
  79
  80         while ( xChainWalk.is() )
  81         {
  82             // walk along the chain of interceptors and look for the interceptor that has to be removed
  83             Reference< XDispatchProviderInterceptor >  xSlave( xChainWalk->getSlaveDispatchProvider(), UNO_QUERY );
  84
  85             if ( xChainWalk == _rxInterceptor )
  86             {
  87                 // old master may be an interceptor too
  88                 Reference< XDispatchProviderInterceptor >  xMaster( xChainWalk->getMasterDispatchProvider(), UNO_QUERY );
  89
  90                 // unchain the interceptor that has to be removed
  91                 xChainWalk->setSlaveDispatchProvider( NULL );
  92                 xChainWalk->setMasterDispatchProvider( NULL );
  93
  94                 // reconnect the chain
  95                 if ( xMaster.is() )
  96                 {
  97                     xMaster->setSlaveDispatchProvider( Reference< XDispatchProvider >::query( xSlave ) );
  98                 }
  99
 100                 // if somebody has registered the same interceptor twice, then we will remove
 101                 // it once per call ...
 102                 break;
 103             }
 104
 105             xChainWalk = xSlave;
 106         }
 107     }
 108
 109
 110     void ControlFeatureInterception::dispose()
 111     {
 112         // release all interceptors
 113         Reference< XDispatchProviderInterceptor > xInterceptor( m_xFirstDispatchInterceptor );
 114         m_xFirstDispatchInterceptor.clear();
 115         while ( xInterceptor.is() )
 116         {
 117             // tell the interceptor it has a new (means no) predecessor
 118             xInterceptor->setMasterDispatchProvider( NULL );
 119
 120             // ask for it's successor
 121             Reference< XDispatchProvider > xSlave = xInterceptor->getSlaveDispatchProvider();
 122             // and give it the new (means no) successoert
 123             xInterceptor->setSlaveDispatchProvider( NULL );
 124
 125             // start over with the next chain element
 126             xInterceptor.set(xSlave, css::uno::UNO_QUERY);
 127         }
 128     }
 129
 130     Reference< XDispatch > ControlFeatureInterception::queryDispatch( const URL& _rURL, const OUString& _rTargetFrameName, ::sal_Int32 _nSearchFlags )
 131     {
 132         Reference< XDispatch > xDispatcher;
 133         if ( m_xFirstDispatchInterceptor.is() )
 134             xDispatcher = m_xFirstDispatchInterceptor->queryDispatch( _rURL, _rTargetFrameName, _nSearchFlags );
 135         return xDispatcher;
 136     }
 137
 138
 139     Reference< XDispatch > ControlFeatureInterception::queryDispatch( const URL& _rURL )
 140     {
 141         return queryDispatch( _rURL, OUString(), 0 );
 142     }
 143
 144
 145     Reference< XDispatch > ControlFeatureInterception::queryDispatch( const sal_Char* _pAsciiURL )
 146     {
 147         return queryDispatch( m_pUrlTransformer->getStrictURLFromAscii( _pAsciiURL ) );
 148     }
 149
 150
 151 } // namespace frm
 152
 153
 154 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */