sc/source/ui/unoobj/listenercalls.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 <com/sun/star/util/XModifyListener.hpp>
  21 #include <osl/diagnose.h>
  22
  23 #include "listenercalls.hxx"
  24
  25 using namespace com::sun::star;
  26
  27 ScUnoListenerCalls::ScUnoListenerCalls()
  28 {
  29 }
  30
  31 ScUnoListenerCalls::~ScUnoListenerCalls()
  32 {
  33     OSL_ENSURE( aEntries.empty(), "unhandled listener calls remaining" );
  34 }
  35
  36 void ScUnoListenerCalls::Add( const uno::Reference<util::XModifyListener>& rListener,
  37                                 const lang::EventObject& rEvent )
  38 {
  39     if ( rListener.is() )
  40         aEntries.push_back( ScUnoListenerEntry( rListener, rEvent ) );
  41 }
  42
  43 void ScUnoListenerCalls::ExecuteAndClear()
  44 {
  45     //  Execute all stored calls and remove them from the list.
  46     //  During each modified() call, Add may be called again.
  47     //  These new calls are executed here, too.
  48
  49     if (!aEntries.empty())
  50     {
  51         std::list<ScUnoListenerEntry>::iterator aItr(aEntries.begin());
  52         std::list<ScUnoListenerEntry>::iterator aEndItr(aEntries.end());
  53         while ( aItr != aEndItr )
  54         {
  55             ScUnoListenerEntry aEntry = *aItr;
  56             try
  57             {
  58                 aEntry.xListener->modified( aEntry.aEvent );
  59             }
  60             catch ( const uno::RuntimeException& )
  61             {
  62                 // the listener is an external object and may throw a RuntimeException
  63                 // for reasons we don't know
  64             }
  65
  66             //  New calls that are added during the modified() call are appended to the end
  67             //  of aEntries, so the loop will catch them, too (as long as erase happens
  68             //  after modified).
  69
  70             aItr = aEntries.erase(aItr);
  71         }
  72     }
  73 }
  74
  75 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */