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618 | /* -*- 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 <comphelper/accessiblewrapper.hxx>
#include <com/sun/star/accessibility/AccessibleEventId.hpp>
#include <com/sun/star/accessibility/AccessibleStateType.hpp>
using namespace ::comphelper;
using namespace ::com::sun::star::accessibility;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::lang;
namespace comphelper
{
OWrappedAccessibleChildrenManager::OWrappedAccessibleChildrenManager( const Reference< XComponentContext >& _rxContext )
:m_xContext( _rxContext )
,m_bTransientChildren( true )
{
}
OWrappedAccessibleChildrenManager::~OWrappedAccessibleChildrenManager( )
{
}
void OWrappedAccessibleChildrenManager::setTransientChildren( bool _bSet )
{
m_bTransientChildren = _bSet;
}
void OWrappedAccessibleChildrenManager::setOwningAccessible( const Reference< XAccessible >& _rxAcc )
{
OSL_ENSURE( !m_aOwningAccessible.get().is(), "OWrappedAccessibleChildrenManager::setOwningAccessible: to be called only once!" );
m_aOwningAccessible = WeakReference< XAccessible >( _rxAcc );
}
void OWrappedAccessibleChildrenManager::removeFromCache( const Reference< XAccessible >& _rxKey )
{
AccessibleMap::iterator aRemovedPos = m_aChildrenMap.find( _rxKey );
if ( m_aChildrenMap.end() != aRemovedPos )
{ // it was cached
// remove ourself as event listener
Reference< XComponent > xComp( aRemovedPos->first, UNO_QUERY );
if( xComp.is() )
xComp->removeEventListener( this );
// and remove the entry from the map
m_aChildrenMap.erase( aRemovedPos );
}
}
void OWrappedAccessibleChildrenManager::invalidateAll( )
{
// remove as event listener from the map elements
for( const auto& rChild : m_aChildrenMap )
{
Reference< XComponent > xComp( rChild.first, UNO_QUERY );
if( xComp.is() )
xComp->removeEventListener( this );
}
// clear the map
AccessibleMap aMap;
m_aChildrenMap.swap( aMap );
}
Reference< XAccessible > OWrappedAccessibleChildrenManager::getAccessibleWrapperFor(
const Reference< XAccessible >& _rxKey )
{
Reference< XAccessible > xValue;
if( !_rxKey.is() )
{
// fprintf( stderr, "It was this path that was crashing stuff\n" );
return xValue;
}
// do we have this child in the cache?
AccessibleMap::const_iterator aPos = m_aChildrenMap.find( _rxKey );
if ( m_aChildrenMap.end() != aPos )
{
xValue = aPos->second;
}
else
{ // not found in the cache, and allowed to create
// -> new wrapper
xValue = new OAccessibleWrapper( m_xContext, _rxKey, m_aOwningAccessible );
// see if we do cache children
if ( !m_bTransientChildren )
{
if (!m_aChildrenMap.emplace( _rxKey, xValue ).second)
{
OSL_FAIL(
"OWrappedAccessibleChildrenManager::"
"getAccessibleWrapperFor: element was already"
" inserted!" );
}
// listen for disposals of inner children - this may happen when the inner context
// is the owner for the inner children (it will dispose these children, and of course
// not our wrapper for these children)
Reference< XComponent > xComp( _rxKey, UNO_QUERY );
if ( xComp.is() )
xComp->addEventListener( this );
}
}
return xValue;
}
void OWrappedAccessibleChildrenManager::dispose()
{
// dispose our children
for( const auto& rChild : m_aChildrenMap )
{
Reference< XComponent > xComp( rChild.first, UNO_QUERY );
if( xComp.is() )
xComp->removeEventListener( this );
Reference< XComponent > xContextComponent;
if( rChild.second.is() )
xContextComponent.set( rChild.second->getAccessibleContext(),
::css::uno::UNO_QUERY );
if( xContextComponent.is() )
xContextComponent->dispose();
}
// clear our children
AccessibleMap aMap;
m_aChildrenMap.swap( aMap );
}
void OWrappedAccessibleChildrenManager::implTranslateChildEventValue( const Any& _rInValue, Any& _rOutValue )
{
_rOutValue.clear();
Reference< XAccessible > xChild;
if ( _rInValue >>= xChild )
_rOutValue <<= getAccessibleWrapperFor( xChild );
}
void OWrappedAccessibleChildrenManager::translateAccessibleEvent( const AccessibleEventObject& _rEvent, AccessibleEventObject& _rTranslatedEvent )
{
// just in case we can't translate some of the values:
_rTranslatedEvent.NewValue = _rEvent.NewValue;
_rTranslatedEvent.OldValue = _rEvent.OldValue;
switch ( _rEvent.EventId )
{
case AccessibleEventId::CHILD:
case AccessibleEventId::ACTIVE_DESCENDANT_CHANGED:
case AccessibleEventId::CONTROLLED_BY_RELATION_CHANGED:
case AccessibleEventId::CONTROLLER_FOR_RELATION_CHANGED:
case AccessibleEventId::LABEL_FOR_RELATION_CHANGED:
case AccessibleEventId::LABELED_BY_RELATION_CHANGED:
case AccessibleEventId::CONTENT_FLOWS_FROM_RELATION_CHANGED:
case AccessibleEventId::CONTENT_FLOWS_TO_RELATION_CHANGED:
// these are events where both the old and the new value contain child references
implTranslateChildEventValue( _rEvent.OldValue, _rTranslatedEvent.OldValue );
implTranslateChildEventValue( _rEvent.NewValue, _rTranslatedEvent.NewValue );
break;
case AccessibleEventId::NAME_CHANGED:
case AccessibleEventId::DESCRIPTION_CHANGED:
case AccessibleEventId::ACTION_CHANGED:
case AccessibleEventId::STATE_CHANGED:
case AccessibleEventId::BOUNDRECT_CHANGED:
case AccessibleEventId::INVALIDATE_ALL_CHILDREN:
case AccessibleEventId::SELECTION_CHANGED:
case AccessibleEventId::VISIBLE_DATA_CHANGED:
case AccessibleEventId::VALUE_CHANGED:
case AccessibleEventId::MEMBER_OF_RELATION_CHANGED:
case AccessibleEventId::CARET_CHANGED:
case AccessibleEventId::TEXT_CHANGED:
case AccessibleEventId::HYPERTEXT_CHANGED:
case AccessibleEventId::TABLE_CAPTION_CHANGED:
case AccessibleEventId::TABLE_COLUMN_DESCRIPTION_CHANGED:
case AccessibleEventId::TABLE_COLUMN_HEADER_CHANGED:
case AccessibleEventId::TABLE_MODEL_CHANGED:
case AccessibleEventId::TABLE_ROW_DESCRIPTION_CHANGED:
case AccessibleEventId::TABLE_ROW_HEADER_CHANGED:
case AccessibleEventId::TABLE_SUMMARY_CHANGED:
// these Ids are also missed: SUB_WINDOW_OF_RELATION_CHANGED & TEXT_ATTRIBUTE_CHANGED
case AccessibleEventId::TEXT_SELECTION_CHANGED:
// nothing to translate
break;
default:
OSL_FAIL( "OWrappedAccessibleChildrenManager::translateAccessibleEvent: unknown (or unexpected) event id!" );
break;
}
}
void OWrappedAccessibleChildrenManager::handleChildNotification( const AccessibleEventObject& _rEvent )
{
if ( AccessibleEventId::INVALIDATE_ALL_CHILDREN == _rEvent.EventId )
{ // clear our child map
invalidateAll( );
}
else if ( AccessibleEventId::CHILD == _rEvent.EventId )
{
// check if the removed or replaced element is cached
Reference< XAccessible > xRemoved;
if ( _rEvent.OldValue >>= xRemoved )
removeFromCache( xRemoved );
}
}
void SAL_CALL OWrappedAccessibleChildrenManager::disposing( const EventObject& _rSource )
{
// this should come from one of the inner XAccessible's of our children
Reference< XAccessible > xSource( _rSource.Source, UNO_QUERY );
AccessibleMap::iterator aDisposedPos = m_aChildrenMap.find( xSource );
#if OSL_DEBUG_LEVEL > 0
if ( m_aChildrenMap.end() == aDisposedPos )
{
OSL_FAIL( "OWrappedAccessibleChildrenManager::disposing: where did this come from?" );
// helper for diagnostics
Reference< XAccessible > xOwningAccessible( m_aOwningAccessible );
Reference< XAccessibleContext > xContext;
try
{
if ( xOwningAccessible.is() )
xContext = xOwningAccessible->getAccessibleContext();
if ( xContext.is() )
{
//TODO: do something
//OUString sName = xContext->getAccessibleName();
//OUString sDescription = xContext->getAccessibleDescription();
//sal_Int32 nPlaceYourBreakpointHere = 0;
}
}
catch( const Exception& /*e*/ )
{
// silent this, it's only diagnostics which failed
}
}
#endif
if ( m_aChildrenMap.end() != aDisposedPos )
{
m_aChildrenMap.erase( aDisposedPos );
}
}
OAccessibleWrapper::OAccessibleWrapper( const Reference< XComponentContext >& _rxContext,
const Reference< XAccessible >& _rxInnerAccessible, const Reference< XAccessible >& _rxParentAccessible )
:OAccessibleWrapper_Base( )
,OComponentProxyAggregation( _rxContext, Reference< XComponent >( _rxInnerAccessible, UNO_QUERY ) )
,m_xParentAccessible( _rxParentAccessible )
,m_xInnerAccessible( _rxInnerAccessible )
{
}
OAccessibleWrapper::~OAccessibleWrapper( )
{
if ( !m_rBHelper.bDisposed )
{
acquire(); // to prevent duplicate dtor calls
dispose();
}
}
IMPLEMENT_FORWARD_XTYPEPROVIDER2( OAccessibleWrapper, OComponentProxyAggregation, OAccessibleWrapper_Base )<--- There is an unknown macro here somewhere. Configuration is required. If IMPLEMENT_FORWARD_XTYPEPROVIDER2 is a macro then please configure it.
IMPLEMENT_FORWARD_REFCOUNT( OAccessibleWrapper, OComponentProxyAggregation )
Any OAccessibleWrapper::queryInterface( const Type& _rType )
{
// #111089# instead of the inner XAccessible the proxy XAccessible must be returned
Any aReturn = OAccessibleWrapper_Base::queryInterface( _rType );
if ( !aReturn.hasValue() )
aReturn = OComponentProxyAggregation::queryInterface( _rType );
return aReturn;
}
Reference< XAccessibleContext > OAccessibleWrapper::getContextNoCreate( ) const
{
return m_aContext;
}
OAccessibleContextWrapper* OAccessibleWrapper::createAccessibleContext( const Reference< XAccessibleContext >& _rxInnerContext )
{
return new OAccessibleContextWrapper( getComponentContext(), _rxInnerContext, this, m_xParentAccessible );
}
Reference< XAccessibleContext > SAL_CALL OAccessibleWrapper::getAccessibleContext( )
{
// see if the context is still alive (we cache it)
Reference< XAccessibleContext > xContext = m_aContext;
if ( !xContext.is() )
{
// create a new context
Reference< XAccessibleContext > xInnerContext = m_xInnerAccessible->getAccessibleContext( );
if ( xInnerContext.is() )
{
xContext = createAccessibleContext( xInnerContext );
// cache it
m_aContext = WeakReference< XAccessibleContext >( xContext );
}
}
return xContext;
}
OAccessibleContextWrapperHelper::OAccessibleContextWrapperHelper(
const Reference< XComponentContext >& _rxContext,
::cppu::OBroadcastHelper& _rBHelper,
const Reference< XAccessibleContext >& _rxInnerAccessibleContext,
const Reference< XAccessible >& _rxOwningAccessible,
const Reference< XAccessible >& _rxParentAccessible )
:OComponentProxyAggregationHelper( _rxContext, _rBHelper )
,m_xInnerContext( _rxInnerAccessibleContext )
,m_xOwningAccessible( _rxOwningAccessible )
,m_xParentAccessible( _rxParentAccessible )
// initialize the mapper for our children
,m_xChildMapper( new OWrappedAccessibleChildrenManager( getComponentContext() ) )
{
// determine if we're allowed to cache children
Reference< XAccessibleStateSet > xStates( m_xInnerContext->getAccessibleStateSet( ) );
OSL_ENSURE( xStates.is(), "OAccessibleContextWrapperHelper::OAccessibleContextWrapperHelper: no inner state set!" );
m_xChildMapper->setTransientChildren( !xStates.is() || xStates->contains( AccessibleStateType::MANAGES_DESCENDANTS) );
m_xChildMapper->setOwningAccessible( m_xOwningAccessible );
}
void OAccessibleContextWrapperHelper::aggregateProxy( oslInterlockedCount& _rRefCount, ::cppu::OWeakObject& _rDelegator )
{
Reference< XComponent > xInnerComponent( m_xInnerContext, UNO_QUERY );
OSL_ENSURE( xInnerComponent.is(), "OComponentProxyAggregation::aggregateProxy: accessible is no XComponent!" );
if ( xInnerComponent.is() )
componentAggregateProxyFor( xInnerComponent, _rRefCount, _rDelegator );
// add as event listener to the inner context, because we want to multiplex the AccessibleEvents
osl_atomic_increment( &_rRefCount );
{
Reference< XAccessibleEventBroadcaster > xBroadcaster( m_xInner, UNO_QUERY );
if ( xBroadcaster.is() )
xBroadcaster->addAccessibleEventListener( this );
}
osl_atomic_decrement( &_rRefCount );
}
OAccessibleContextWrapperHelper::~OAccessibleContextWrapperHelper( )
{
OSL_ENSURE( m_rBHelper.bDisposed, "OAccessibleContextWrapperHelper::~OAccessibleContextWrapperHelper: you should ensure (in your dtor) that the object is disposed!" );
}
Any SAL_CALL OAccessibleContextWrapperHelper::queryInterface( const Type& _rType )
{
Any aReturn = OComponentProxyAggregationHelper::queryInterface( _rType );
if ( !aReturn.hasValue() )
aReturn = OAccessibleContextWrapperHelper_Base::queryInterface( _rType );
return aReturn;
}
IMPLEMENT_FORWARD_XTYPEPROVIDER2( OAccessibleContextWrapperHelper, OComponentProxyAggregationHelper, OAccessibleContextWrapperHelper_Base )
sal_Int32 OAccessibleContextWrapperHelper::baseGetAccessibleChildCount( )
{
return m_xInnerContext->getAccessibleChildCount();
}
Reference< XAccessible > OAccessibleContextWrapperHelper::baseGetAccessibleChild( sal_Int32 i )
{
// get the child of the wrapped component
Reference< XAccessible > xInnerChild = m_xInnerContext->getAccessibleChild( i );
return m_xChildMapper->getAccessibleWrapperFor( xInnerChild );
}
Reference< XAccessibleRelationSet > OAccessibleContextWrapperHelper::baseGetAccessibleRelationSet( )
{
return m_xInnerContext->getAccessibleRelationSet();
// TODO: if this relation set would contain relations to siblings, we would normally need
// to wrap them, too...
}
void SAL_CALL OAccessibleContextWrapperHelper::notifyEvent( const AccessibleEventObject& _rEvent )
{
#if OSL_DEBUG_LEVEL > 0
if ( AccessibleEventId::STATE_CHANGED == _rEvent.EventId )
{
bool bChildTransienceChanged = false;
sal_Int16 nChangeState = 0;
if ( _rEvent.OldValue >>= nChangeState )
bChildTransienceChanged = bChildTransienceChanged || AccessibleStateType::MANAGES_DESCENDANTS == nChangeState;
if ( _rEvent.NewValue >>= nChangeState )
bChildTransienceChanged = bChildTransienceChanged || AccessibleStateType::MANAGES_DESCENDANTS == nChangeState;
OSL_ENSURE( !bChildTransienceChanged, "OAccessibleContextWrapperHelper::notifyEvent: MANAGES_DESCENDANTS is not expected to change during runtime!" );
// if this asserts, then we would need to update our m_bTransientChildren flag here,
// as well as (potentially) our child cache
}
#endif
AccessibleEventObject aTranslatedEvent( _rEvent );
{
::osl::MutexGuard aGuard( m_rBHelper.rMutex );
// translate the event
queryInterface( cppu::UnoType<XInterface>::get() ) >>= aTranslatedEvent.Source;
m_xChildMapper->translateAccessibleEvent( _rEvent, aTranslatedEvent );
// see if any of these notifications affect our child manager
m_xChildMapper->handleChildNotification( _rEvent );
if ( aTranslatedEvent.NewValue == m_xInner )
aTranslatedEvent.NewValue <<= aTranslatedEvent.Source;
if ( aTranslatedEvent.OldValue == m_xInner )
aTranslatedEvent.OldValue <<= aTranslatedEvent.Source;
}
notifyTranslatedEvent( aTranslatedEvent );
}
void SAL_CALL OAccessibleContextWrapperHelper::dispose()
{
::osl::MutexGuard aGuard( m_rBHelper.rMutex );
// stop multiplexing events
Reference< XAccessibleEventBroadcaster > xBroadcaster( m_xInner, UNO_QUERY );
OSL_ENSURE( xBroadcaster.is(), "OAccessibleContextWrapperHelper::disposing(): inner context is no broadcaster!" );
if ( xBroadcaster.is() )
xBroadcaster->removeAccessibleEventListener( this );
// dispose the child cache/map
m_xChildMapper->dispose();
// let the base class dispose the inner component
OComponentProxyAggregationHelper::dispose();
}
void SAL_CALL OAccessibleContextWrapperHelper::disposing( const EventObject& _rEvent )
{
// simply disambiguate this
OComponentProxyAggregationHelper::disposing( _rEvent );
}
IMPLEMENT_FORWARD_XINTERFACE2( OAccessibleContextWrapper, OAccessibleContextWrapper_CBase, OAccessibleContextWrapperHelper )
IMPLEMENT_FORWARD_XTYPEPROVIDER2( OAccessibleContextWrapper, OAccessibleContextWrapper_CBase, OAccessibleContextWrapperHelper )
OAccessibleContextWrapper::OAccessibleContextWrapper( const Reference< XComponentContext >& _rxContext,
const Reference< XAccessibleContext >& _rxInnerAccessibleContext, const Reference< XAccessible >& _rxOwningAccessible,
const Reference< XAccessible >& _rxParentAccessible )
:OAccessibleContextWrapper_CBase( m_aMutex )
,OAccessibleContextWrapperHelper( _rxContext, rBHelper, _rxInnerAccessibleContext, _rxOwningAccessible, _rxParentAccessible )
,m_nNotifierClient( 0 )
{
aggregateProxy( m_refCount, *this );
}
OAccessibleContextWrapper::~OAccessibleContextWrapper()
{
}
sal_Int32 SAL_CALL OAccessibleContextWrapper::getAccessibleChildCount( )
{
return baseGetAccessibleChildCount();
}
Reference< XAccessible > SAL_CALL OAccessibleContextWrapper::getAccessibleChild( sal_Int32 i )
{
return baseGetAccessibleChild( i );
}
Reference< XAccessible > SAL_CALL OAccessibleContextWrapper::getAccessibleParent( )
{
return m_xParentAccessible;
}
sal_Int32 SAL_CALL OAccessibleContextWrapper::getAccessibleIndexInParent( )
{
return m_xInnerContext->getAccessibleIndexInParent();
}
sal_Int16 SAL_CALL OAccessibleContextWrapper::getAccessibleRole( )
{
return m_xInnerContext->getAccessibleRole();
}
OUString SAL_CALL OAccessibleContextWrapper::getAccessibleDescription( )
{
return m_xInnerContext->getAccessibleDescription();
}
OUString SAL_CALL OAccessibleContextWrapper::getAccessibleName( )
{
return m_xInnerContext->getAccessibleName();
}
Reference< XAccessibleRelationSet > SAL_CALL OAccessibleContextWrapper::getAccessibleRelationSet( )
{
return baseGetAccessibleRelationSet();
}
Reference< XAccessibleStateSet > SAL_CALL OAccessibleContextWrapper::getAccessibleStateSet( )
{
return m_xInnerContext->getAccessibleStateSet();
}
Locale SAL_CALL OAccessibleContextWrapper::getLocale( )
{
return m_xInnerContext->getLocale();
}
void OAccessibleContextWrapper::notifyTranslatedEvent( const AccessibleEventObject& _rEvent )
{
if ( m_nNotifierClient )
AccessibleEventNotifier::addEvent( m_nNotifierClient, _rEvent );
}
void SAL_CALL OAccessibleContextWrapper::addAccessibleEventListener( const Reference< XAccessibleEventListener >& _rxListener )
{
::osl::MutexGuard aGuard( m_aMutex );
if ( !m_nNotifierClient )
m_nNotifierClient = AccessibleEventNotifier::registerClient( );
AccessibleEventNotifier::addEventListener( m_nNotifierClient, _rxListener );
}
void SAL_CALL OAccessibleContextWrapper::removeAccessibleEventListener( const Reference< XAccessibleEventListener >& _rxListener )
{
::osl::MutexGuard aGuard( m_aMutex );
if ( m_nNotifierClient )
{
if ( 0 == AccessibleEventNotifier::removeEventListener( m_nNotifierClient, _rxListener ) )
{
AccessibleEventNotifier::TClientId nId( m_nNotifierClient );
m_nNotifierClient = 0;
AccessibleEventNotifier::revokeClient( nId );
}
}
}
void SAL_CALL OAccessibleContextWrapper::disposing()
{
AccessibleEventNotifier::TClientId nClientId( 0 );
// --- <mutex lock> -----------------------------------------
{
::osl::MutexGuard aGuard( m_aMutex );
// prepare notifying our AccessibleListeners
if ( m_nNotifierClient )
{
nClientId = m_nNotifierClient;
m_nNotifierClient = 0;
}
}
// --- </mutex lock> -----------------------------------------
// let the base class do
OAccessibleContextWrapperHelper::dispose();
// notify the disposal
if ( nClientId )
AccessibleEventNotifier::revokeClientNotifyDisposing( nClientId, *this );
}
} // namespace accessibility
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