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 ControlFeatureInterception::registerDispatchProviderInterceptor( const Reference< XDispatchProviderInterceptor >& _rxInterceptor )
  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             _rxInterceptor->setSlaveDispatchProvider( m_xFirstDispatchInterceptor );
  52             m_xFirstDispatchInterceptor->setMasterDispatchProvider( m_xFirstDispatchInterceptor );
  53         }
  54
  55         // we are the master of the chain's first interceptor
  56         m_xFirstDispatchInterceptor = _rxInterceptor;
  57         m_xFirstDispatchInterceptor->setMasterDispatchProvider( nullptr );
  58             // it's the first of the interceptor chain
  59     }
  60
  61
  62     void ControlFeatureInterception::releaseDispatchProviderInterceptor( const Reference< XDispatchProviderInterceptor >& _rxInterceptor )
  63     {
  64         if ( !_rxInterceptor.is() )
  65         {
  66             OSL_FAIL( "ControlFeatureInterception::releaseDispatchProviderInterceptor: invalid interceptor!" );
  67             return;
  68         }
  69
  70         Reference< XDispatchProviderInterceptor >  xChainWalk( m_xFirstDispatchInterceptor );
  71
  72         if ( m_xFirstDispatchInterceptor == _rxInterceptor )
  73         {   // our chain will have a new first element
  74             Reference< XDispatchProviderInterceptor >  xSlave( m_xFirstDispatchInterceptor->getSlaveDispatchProvider(), UNO_QUERY );
  75             m_xFirstDispatchInterceptor = xSlave;
  76         }
  77         // do this before removing the interceptor from the chain as we won't know it's slave afterwards)
  78
  79         while ( xChainWalk.is() )
  80         {
  81             // walk along the chain of interceptors and look for the interceptor that has to be removed
  82             Reference< XDispatchProviderInterceptor >  xSlave( xChainWalk->getSlaveDispatchProvider(), UNO_QUERY );
  83
  84             if ( xChainWalk == _rxInterceptor )
  85             {
  86                 // old master may be an interceptor too
  87                 Reference< XDispatchProviderInterceptor >  xMaster( xChainWalk->getMasterDispatchProvider(), UNO_QUERY );
  88
  89                 // unchain the interceptor that has to be removed
  90                 xChainWalk->setSlaveDispatchProvider( nullptr );
  91                 xChainWalk->setMasterDispatchProvider( nullptr );
  92
  93                 // reconnect the chain
  94                 if ( xMaster.is() )
  95                 {
  96                     xMaster->setSlaveDispatchProvider( Reference< XDispatchProvider >::query( xSlave ) );
  97                 }
  98
  99                 // if somebody has registered the same interceptor twice, then we will remove
 100                 // it once per call ...
 101                 break;
 102             }
 103
 104             xChainWalk = xSlave;
 105         }
 106     }
 107
 108
 109     void ControlFeatureInterception::dispose()
 110     {
 111         // release all interceptors
 112         Reference< XDispatchProviderInterceptor > xInterceptor( m_xFirstDispatchInterceptor );
 113         m_xFirstDispatchInterceptor.clear();
 114         while ( xInterceptor.is() )
 115         {
 116             // tell the interceptor it has a new (means no) predecessor
 117             xInterceptor->setMasterDispatchProvider( nullptr );
 118
 119             // ask for its successor
 120             Reference< XDispatchProvider > xSlave = xInterceptor->getSlaveDispatchProvider();
 121             // and give it the new (means no) successoert
 122             xInterceptor->setSlaveDispatchProvider( nullptr );
 123
 124             // start over with the next chain element
 125             xInterceptor.set(xSlave, css::uno::UNO_QUERY);
 126         }
 127     }
 128
 129     Reference< XDispatch > ControlFeatureInterception::queryDispatch( const URL& _rURL )
 130     {
 131         Reference< XDispatch > xDispatcher;
 132         if ( m_xFirstDispatchInterceptor.is() )
 133             xDispatcher = m_xFirstDispatchInterceptor->queryDispatch( _rURL, OUString(), 0 );
 134         return xDispatcher;
 135     }
 136
 137
 138     Reference< XDispatch > ControlFeatureInterception::queryDispatch( const char* _pAsciiURL )
 139     {
 140         return queryDispatch( m_pUrlTransformer->getStrictURLFromAscii( _pAsciiURL ) );
 141     }
 142
 143
 144 } // namespace frm
 145
 146
 147 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */