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