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