From ed5640d8b587fbcfed7dd7967f3de04b37a76f26 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 11:06:44 +0200 Subject: Adding upstream version 4:7.4.7. Signed-off-by: Daniel Baumann --- comphelper/source/misc/weakeventlistener.cxx | 74 ++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 comphelper/source/misc/weakeventlistener.cxx (limited to 'comphelper/source/misc/weakeventlistener.cxx') diff --git a/comphelper/source/misc/weakeventlistener.cxx b/comphelper/source/misc/weakeventlistener.cxx new file mode 100644 index 000000000..e8ce46590 --- /dev/null +++ b/comphelper/source/misc/weakeventlistener.cxx @@ -0,0 +1,74 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include +#include + + +namespace comphelper +{ + + + using namespace ::com::sun::star::uno; + using namespace ::com::sun::star::lang; + + OWeakListenerAdapterBase::~OWeakListenerAdapterBase() + { + } + + OWeakEventListenerAdapter::OWeakEventListenerAdapter( Reference< XWeak > const & _rxListener, Reference< XComponent > const & _rxBroadcaster ) + :OWeakEventListenerAdapter_Base( _rxListener, _rxBroadcaster ) + { + // add ourself as listener to the broadcaster + OSL_ENSURE( _rxBroadcaster.is(), "OWeakEventListenerAdapter::OWeakEventListenerAdapter: invalid broadcaster!" ); + if ( _rxBroadcaster.is() ) + { + osl_atomic_increment( &m_refCount ); + { + _rxBroadcaster->addEventListener( this ); + } + osl_atomic_decrement( &m_refCount ); + OSL_ENSURE( m_refCount > 0, "OWeakEventListenerAdapter::OWeakEventListenerAdapter: oops - not to be used with implementations which hold their listeners weak!" ); + // the one and only reason for this adapter class (A) is to add as listener to a component (C) which + // holds its listeners hard, and forward all calls then to another listener (L) which is + // held weak by A. + // Now if C holds listeners weak, then we do not need A, we can add L directly to C. + } + + OSL_ENSURE( getListener().is(), "OWeakEventListenerAdapter::OWeakEventListenerAdapter: invalid listener (does not support the XEventListener interface)!" ); + } + + + void SAL_CALL OWeakEventListenerAdapter::disposing( ) + { + Reference< XComponent > xBroadcaster( getBroadcaster( ), UNO_QUERY ); + OSL_ENSURE( xBroadcaster.is(), "OWeakEventListenerAdapter::disposing: broadcaster is invalid in the meantime! How this?" ); + if ( xBroadcaster.is() ) + { + xBroadcaster->removeEventListener( this ); + } + + resetListener(); + } + + +} // namespace comphelper + + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ -- cgit v1.2.3