/* -*- 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 .
*/
// return the property which should be used as AccessibleName const OUString & lcl_getPreferredAccNameProperty( const Reference< XPropertySetInfo >& _rxPSI )
{ if ( _rxPSI.is() && _rxPSI->hasPropertyByName( LABEL_PROPERTY_NAME ) ) return LABEL_PROPERTY_NAME; else return NAME_PROPERTY_NAME;
}
// determines whether or not a state which belongs to the inner context needs to be forwarded to the "composed" // context bool isComposedState( const sal_Int64 _nState )
{ return ( ( AccessibleStateType::INVALID != _nState )
&& ( AccessibleStateType::DEFUNC != _nState )
&& ( AccessibleStateType::ICONIFIED != _nState )
&& ( AccessibleStateType::RESIZABLE != _nState )
&& ( AccessibleStateType::SELECTABLE != _nState )
&& ( AccessibleStateType::SHOWING != _nState )
&& ( AccessibleStateType::MANAGES_DESCENDANTS != _nState )
&& ( AccessibleStateType::VISIBLE != _nState )
);
}
}
if ( m_xControlContextProxy.is() )
m_xControlContextProxy->setDelegator( nullptr );
m_xControlContextProxy.clear();
m_xControlContextTypeAccess.clear();
m_xControlContextComponent.clear(); // this should remove the _only_ three "real" reference (means not delegated to // ourself) to this proxy, and thus delete it
}
OSL_ENSURE( !m_xControlContextProxy.is(), "AccessibleControlShape::Init: already initialized!" ); try
{ // What we need to do here is merge the functionality of the AccessibleContext of our UNO control // with our own AccessibleContext-related functionality.
// The problem is that we do not know the interfaces our "inner" context supports - this may be any // XAccessibleXXX interface (or even any other) which makes sense for it.
// In theory, we could implement all possible interfaces ourself, and re-route all functionality to // the inner context (except those we implement ourself, like XAccessibleComponent). But this is in no // way future-proof - as soon as an inner context appears which implements an additional interface, // we would need to adjust our implementation to support this new interface, too. Bad idea.
// The usual solution for such a problem is aggregation. Aggregation means using UNO's own mechanism // for merging an inner with an outer component, and get a component which behaves as it is exactly one. // This is what XAggregation is for. Unfortunately, aggregation requires _exact_ control over the ref count // of the inner object, which we do not have at all. // Bad, too.
// But there is a solution: com.sun.star.reflection.ProxyFactory. This service is able to create a proxy // for any component, which supports _exactly_ the same interfaces as the component. In addition, it can // be aggregated, as by definition the proxy's ref count is exactly 1 when returned from the factory. // Sounds better. Though this yields the problem of slightly degraded performance, it's the only solution // I'm aware of at the moment...
// get the control which belongs to our model (relative to our view) const vcl::Window* pViewWindow = maShapeTreeInfo.GetWindow();
SdrUnoObj* pUnoObjectImpl = dynamic_cast<SdrUnoObj*>(SdrObject::getSdrObjectFromXShape(mxShape));
SdrView* pView = maShapeTreeInfo.GetSdrView();
OSL_ENSURE( pView && pViewWindow && pUnoObjectImpl, "AccessibleControlShape::Init: no view, or no view window, no SdrUnoObj!" );
if (!pView || !pViewWindow || !pUnoObjectImpl) return;
// get the context of the control - it will be our "inner" context
m_xUnoControl = pUnoObjectImpl->GetUnoControl( *pView, *pViewWindow->GetOutDev() );
if ( !m_xUnoControl.is() )
{ // the control has not yet been created. Though speaking strictly, it is a bug that // our instance here is created without an existing control (because an AccessibleControlShape // is a representation of a view object, and can only live if the view it should represent // is complete, which implies a living control), it's by far the easiest and most riskless way // to fix this here in this class. // Okay, we will add as listener to the control container where we expect our control to appear.
OSL_ENSURE( !m_bWaitingForControl, "AccessibleControlShape::Init: already waiting for the control!" );
Reference< XContainer > xControlContainer = lcl_getControlContainer( pViewWindow->GetOutDev(), maShapeTreeInfo.GetSdrView() );
OSL_ENSURE( xControlContainer.is(), "AccessibleControlShape::Init: unable to find my ControlContainer!" ); if ( xControlContainer.is() )
{
xControlContainer->addContainerListener( this );
m_bWaitingForControl = true;
}
} else
{
Reference< XModeChangeBroadcaster > xControlModes( m_xUnoControl, UNO_QUERY );
Reference< XAccessible > xControlAccessible( xControlModes, UNO_QUERY );
Reference< XAccessibleContext > xNativeControlContext; if ( xControlAccessible.is() )
xNativeControlContext = xControlAccessible->getAccessibleContext();
OSL_ENSURE( xNativeControlContext.is(), "AccessibleControlShape::Init: no AccessibleContext for the control!" );
m_aControlContext = WeakReference< XAccessibleContext >( xNativeControlContext );
// add as listener to the context - we want to multiplex some states if (isControlInAliveMode() && xNativeControlContext.is() )
{ // (but only in alive mode)
startStateMultiplexing( );
}
// now that we have all information about our control, do some adjustments
adjustAccessibleRole();
initializeComposedState();
// some initialization for our child manager, which is used in alive mode only if (isControlInAliveMode())
{
sal_Int64 nStates( getAccessibleStateSet( ) );
m_pChildManager->setTransientChildren( nStates & AccessibleStateType::MANAGES_DESCENDANTS );
}
// finally, aggregate a proxy for the control context // first a factory for the proxy
Reference< XProxyFactory > xFactory = ProxyFactory::create( comphelper::getProcessComponentContext() ); // then the proxy itself if ( xNativeControlContext.is() )
{
m_xControlContextProxy = xFactory->createProxy( xNativeControlContext );
m_xControlContextTypeAccess.set( xNativeControlContext, UNO_QUERY_THROW );
m_xControlContextComponent.set( xNativeControlContext, UNO_QUERY_THROW );
// aggregate the proxy
osl_atomic_increment( &m_refCount ); if ( m_xControlContextProxy.is() )
{ // At this point in time, the proxy has a ref count of exactly one - in m_xControlContextProxy. // Remember to _not_ reset this member unless the delegator of the proxy has been reset, too!
m_xControlContextProxy->setDelegator( *this );
}
osl_atomic_decrement( &m_refCount );
m_bDisposeNativeContext = true;
// Finally, we need to add ourself as mode listener to the control. In case the mode switches, // we need to dispose ourself.
xControlModes->addModeChangeListener( this );
}
}
} catch( const Exception& )
{
OSL_FAIL( "AccessibleControlShape::Init: could not \"aggregate\" the controls XAccessibleContext!" );
}
}
void SAL_CALL AccessibleControlShape::grabFocus()
{ if (!m_xUnoControl.is() || !isControlInAliveMode())
{ // in design mode, we simply forward the request to the base class
AccessibleShape::grabFocus();
} else
{
Reference< XWindow > xWindow( m_xUnoControl, UNO_QUERY );
OSL_ENSURE( xWindow.is(), "AccessibleControlShape::grabFocus: invalid control!" ); if ( xWindow.is() )
xWindow->setFocus();
}
}
OUString
AccessibleControlShape::CreateAccessibleDescription()
{
DescriptionGenerator aDG (mxShape);
ShapeTypeId nShapeType = ShapeTypeHandler::Instance().GetTypeId (mxShape); switch (nShapeType)
{ case DRAWING_CONTROL:
{ // check if we can obtain the "Desc" property from the model
OUString sDesc( getControlModelStringProperty( DESC_PROPERTY_NAME ) ); if ( sDesc.isEmpty() )
{ // no -> use the default
aDG.Initialize (STR_ObjNameSingulUno);
aDG.AddProperty (u"ControlBackground"_ustr, DescriptionGenerator::PropertyType::Color);
aDG.AddProperty ( u"ControlBorder"_ustr, DescriptionGenerator::PropertyType::Integer);
} // ensure that we are listening to the Name property
m_bListeningForDesc = ensureListeningState( m_bListeningForDesc, true, DESC_PROPERTY_NAME );
} break;
default:
aDG.Initialize (u"Unknown accessible control shape"); if (mxShape.is())
{
aDG.AppendString (u"service name=");
aDG.AppendString (mxShape->getShapeType());
}
}
// check if it is the name or the description if ( _rEvent.PropertyName == NAME_PROPERTY_NAME
|| _rEvent.PropertyName == LABEL_PROPERTY_NAME )
{
SetAccessibleName(
CreateAccessibleName(),
AccessibleContextBase::AutomaticallyCreated);
} elseif ( _rEvent.PropertyName == DESC_PROPERTY_NAME )
{
SetAccessibleDescription(
CreateAccessibleDescription(),
AccessibleContextBase::AutomaticallyCreated);
} #if OSL_DEBUG_LEVEL > 0 else
{
OSL_FAIL( "AccessibleControlShape::propertyChange: where did this come from?" );
} #endif
}
Any SAL_CALL AccessibleControlShape::queryInterface( const Type& _rType )
{
Any aReturn = AccessibleShape::queryInterface( _rType ); if ( !aReturn.hasValue() )
{
aReturn = AccessibleControlShape_Base::queryInterface( _rType ); if ( !aReturn.hasValue() && m_xControlContextProxy.is() )
aReturn = m_xControlContextProxy->queryAggregation( _rType );
} return aReturn;
}
Sequence< Type > SAL_CALL AccessibleControlShape::getTypes()
{
Sequence< Type > aShapeTypes = AccessibleShape::getTypes();
Sequence< Type > aOwnTypes = AccessibleControlShape_Base::getTypes();
Sequence< Type > aAggregateTypes; if ( m_xControlContextTypeAccess.is() )
aAggregateTypes = m_xControlContextTypeAccess->getTypes();
// don't multiplex states which the inner context is not responsible for if ( isComposedState( nLostState ) )
AccessibleShape::ResetState( nLostState );
void SAL_CALL AccessibleControlShape::modeChanged(const ModeChangeEvent& rSource)
{ // did it come from our inner context (the real one, not it's proxy!)?
SAL_INFO("sw.uno", "AccessibleControlShape::modeChanged");
Reference<XControl> xSource(rSource.Source, UNO_QUERY); // for faster compare if(xSource.get() != m_xUnoControl.get())
{
SAL_WARN("sw.uno", "AccessibleControlShape::modeChanged: where did this come from?"); return;
}
SolarMutexGuard g; // If our "pseudo-aggregated" inner context does not live anymore, // we don't want to live, too. This is accomplished by asking our // parent to replace this object with a new one. Disposing this // object and sending notifications about the replacement are in // the responsibility of our parent. constbool bReplaced = mpParent->ReplaceChild(this, mxShape, 0, maShapeTreeInfo);
SAL_WARN_IF(!bReplaced, "sw.uno", "AccessibleControlShape::modeChanged: replacing ourselves away did fail");
}
bool AccessibleControlShape::ensureListeningState( constbool _bCurrentlyListening, constbool _bNeedNewListening, const OUString& _rPropertyName )
{ if ( ( _bCurrentlyListening == _bNeedNewListening ) || !ensureControlModelAccess() ) // nothing to do return _bCurrentlyListening;
try
{ if ( !m_xModelPropsMeta.is() || m_xModelPropsMeta->hasPropertyByName( _rPropertyName ) )
{ // add or revoke as listener if ( _bNeedNewListening )
m_xControlModel->addPropertyChangeListener( _rPropertyName, static_cast< XPropertyChangeListener* >( this ) ); else
m_xControlModel->removePropertyChangeListener( _rPropertyName, static_cast< XPropertyChangeListener* >( this ) );
} else
OSL_FAIL( "AccessibleControlShape::ensureListeningState: this property does not exist at this model!" );
} catch( const Exception& )
{
OSL_FAIL( "AccessibleControlShape::ensureListeningState: could not change the listening state!" );
}
return _bNeedNewListening;
}
sal_Int64 SAL_CALL AccessibleControlShape::getAccessibleChildCount( )
{ if ( !m_xUnoControl.is() ) return 0; elseif (!isControlInAliveMode()) // no special action required when in design mode return AccessibleShape::getAccessibleChildCount( ); else
{ // in alive mode, we have the full control over our children - they are determined by the children // of the context of our UNO control
Reference< XAccessibleContext > xControlContext( m_aControlContext );
OSL_ENSURE( xControlContext.is(), "AccessibleControlShape::getAccessibleChildCount: control context already dead! How this!" ); return xControlContext.is() ? xControlContext->getAccessibleChildCount() : 0;
}
}
Reference< XAccessible > SAL_CALL AccessibleControlShape::getAccessibleChild( sal_Int64 i )
{
Reference< XAccessible > xChild; if ( !m_xUnoControl.is() )
{ throw IndexOutOfBoundsException();
} if (!isControlInAliveMode())
{ // no special action required when in design mode - let the base class handle this
xChild = AccessibleShape::getAccessibleChild( i );
} else
{ // in alive mode, we have the full control over our children - they are determined by the children // of the context of our UNO control
Reference< XAccessibleContext > xControlContext( m_aControlContext );
OSL_ENSURE( xControlContext.is(), "AccessibleControlShape::getAccessibleChild: control context already dead! How this!" ); if ( xControlContext.is() )
{
Reference< XAccessible > xInnerChild( xControlContext->getAccessibleChild( i ) );
OSL_ENSURE( xInnerChild.is(), "AccessibleControlShape::getAccessibleChild: control context returned nonsense!" ); if ( xInnerChild.is() )
{ // we need to wrap this inner child into an own implementation
xChild = m_pChildManager->getAccessibleWrapperFor( xInnerChild );
}
}
}
#if OSL_DEBUG_LEVEL > 0
sal_Int64 nChildIndex = -1;
Reference< XAccessibleContext > xContext; if ( xChild.is() )
xContext = xChild->getAccessibleContext( ); if ( xContext.is() )
nChildIndex = xContext->getAccessibleIndexInParent( );
SAL_WARN_IF( nChildIndex != i, "svx", "AccessibleControlShape::getAccessibleChild: index mismatch," " nChildIndex=" << nChildIndex << " vs i=" << i ); #endif return xChild;
}
if (sName.isEmpty())
{ // check if we can obtain the "Name" resp. "Label" property from the model const OUString aAccNameProperty = lcl_getPreferredAccNameProperty( m_xModelPropsMeta );
sName = getControlModelStringProperty( aAccNameProperty ); if ( !sName.getLength() )
{ // no -> use the default
sName = AccessibleShape::CreateAccessibleName();
}
}
// now that somebody first asked us for our name, ensure that we are listening to name changes on the model
m_bListeningForName = ensureListeningState( m_bListeningForName, true, lcl_getPreferredAccNameProperty( m_xModelPropsMeta ) );
if ( m_bMultiplexingStates )
stopStateMultiplexing( );
// dispose the child cache/map
m_pChildManager->dispose();
// release the model
m_xControlModel.clear();
m_xModelPropsMeta.clear();
m_aControlContext = WeakReference< XAccessibleContext >();
// stop listening at the control container (should never be necessary here, but who knows...) if ( m_bWaitingForControl )
{
OSL_FAIL( "AccessibleControlShape::disposing: this should never happen!" ); if (auto pWindow = maShapeTreeInfo.GetWindow())
{
Reference< XContainer > xContainer = lcl_getControlContainer( pWindow->GetOutDev(), maShapeTreeInfo.GetSdrView() ); if ( xContainer.is() )
{
m_bWaitingForControl = false;
xContainer->removeContainerListener( this );
}
}
}
// forward the disposal to our inner context if ( m_bDisposeNativeContext )
{ // don't listen for mode changes anymore
Reference< XModeChangeBroadcaster > xControlModes( m_xUnoControl, UNO_QUERY );
OSL_ENSURE( xControlModes.is(), "AccessibleControlShape::disposing: don't have a mode broadcaster anymore!" ); if ( xControlModes.is() )
xControlModes->removeModeChangeListener( this );
if ( m_xControlContextComponent.is() )
m_xControlContextComponent->dispose(); // do _not_ clear m_xControlContextProxy! This has to be done in the dtor for correct ref-count handling
// no need to dispose the proxy/inner context anymore
m_bDisposeNativeContext = false;
}
m_xUnoControl.clear();
// let the base do its stuff
AccessibleShape::disposing();
}
bool AccessibleControlShape::ensureControlModelAccess()
{ if ( m_xControlModel.is() ) returntrue;
#if OSL_DEBUG_LEVEL > 0 // we should have a control, and it should be in alive mode
OSL_PRECOND(isControlInAliveMode(), "AccessibleControlShape::startStateMultiplexing: should be done in alive mode only!" ); #endif // we should have the native context of the control
Reference< XAccessibleEventBroadcaster > xBroadcaster( m_aControlContext.get(), UNO_QUERY );
OSL_ENSURE( xBroadcaster.is(), "AccessibleControlShape::startStateMultiplexing: no AccessibleEventBroadcaster on the native context!" );
if ( xBroadcaster.is() )
{
xBroadcaster->addAccessibleEventListener( this );
m_bMultiplexingStates = true;
}
}
void AccessibleControlShape::stopStateMultiplexing()
{
OSL_PRECOND( m_bMultiplexingStates, "AccessibleControlShape::stopStateMultiplexing: not multiplexing!" );
// we should have the native context of the control
Reference< XAccessibleEventBroadcaster > xBroadcaster( m_aControlContext.get(), UNO_QUERY );
OSL_ENSURE( xBroadcaster.is(), "AccessibleControlShape::stopStateMultiplexing: no AccessibleEventBroadcaster on the native context!" );
if ( xBroadcaster.is() )
{
xBroadcaster->removeAccessibleEventListener( this );
m_bMultiplexingStates = false;
}
}
OUString AccessibleControlShape::getControlModelStringProperty( const OUString& _rPropertyName ) const
{
OUString sReturn; try
{ if ( const_cast< AccessibleControlShape* >( this )->ensureControlModelAccess() )
{ if ( !m_xModelPropsMeta.is() || m_xModelPropsMeta->hasPropertyByName( _rPropertyName ) ) // ask only if a) the control does not have a PropertySetInfo object or b) it has, and the // property in question is available
m_xControlModel->getPropertyValue( _rPropertyName ) >>= sReturn;
}
} catch( const Exception& )
{
TOOLS_WARN_EXCEPTION( "svx", "OAccessibleControlContext::getModelStringProperty" );
} return sReturn;
}
void AccessibleControlShape::adjustAccessibleRole( )
{ // if we're in design mode, we are a simple SHAPE, in alive mode, we use the role of our inner context if (!isControlInAliveMode()) return;
// we're in alive mode -> determine the role of the inner context
Reference< XAccessibleContext > xNativeContext( m_aControlContext );
OSL_PRECOND( xNativeContext.is(), "AccessibleControlShape::adjustAccessibleRole: no inner context!" ); if ( xNativeContext.is() )
SetAccessibleRole( xNativeContext->getAccessibleRole( ) );
}
#ifdef DBG_UTIL
bool AccessibleControlShape::SetState( sal_Int64 _nState )
{
OSL_ENSURE(!isControlInAliveMode() || !isComposedState(_nState), "AccessibleControlShape::SetState: a state which should be determined by the control context is set from outside!" ); return AccessibleShape::SetState( _nState );
} #endif// DBG_UTIL
void AccessibleControlShape::initializeComposedState()
{ if (!isControlInAliveMode()) // no action necessary for design mode return;
// we need to reset some states of the composed set, because they either do not apply // for controls in alive mode, or are in the responsibility of the UNO-control, anyway
mnStateSet &= ~AccessibleStateType::ENABLED; // this is controlled by the UNO-control
mnStateSet &= ~AccessibleStateType::SENSITIVE; // this is controlled by the UNO-control
mnStateSet &= ~AccessibleStateType::FOCUSABLE; // this is controlled by the UNO-control
mnStateSet &= ~AccessibleStateType::SELECTABLE; // this does not hold for an alive UNO-control
// get my inner context
Reference< XAccessibleContext > xInnerContext( m_aControlContext );
OSL_PRECOND( xInnerContext.is(), "AccessibleControlShape::initializeComposedState: no inner context!" ); if ( !xInnerContext.is() ) return;
// get all states of the inner context
sal_Int64 nInnerStates( xInnerContext->getAccessibleStateSet() );
// look which one are to be propagated to the composed context for ( int i = 0; i < 63; ++i )
{
sal_Int64 nState = sal_Int64(1) << i; if ( (nInnerStates & nState) && isComposedState( nState ) )
{
mnStateSet |= nState;
}
}
}
// now finally the control for the model we're responsible for has been inserted into the container
Reference< XInterface > xKeepAlive( *this );
// first, we're not interested in any more container events if ( xContainer.is() )
{
xContainer->removeContainerListener( this );
m_bWaitingForControl = false;
}
// second, we need to replace ourself with a new version, which now can be based on the // control
OSL_VERIFY( mpParent->ReplaceChild ( this, mxShape, 0, maShapeTreeInfo ) );
}
void SAL_CALL AccessibleControlShape::elementRemoved( const css::container::ContainerEvent& )
{ // not interested in
}
void SAL_CALL AccessibleControlShape::elementReplaced( const css::container::ContainerEvent& )
{ // not interested in
}
AccessibleControlShape* AccessibleControlShape::GetLabeledByControlShape( )
{ if(m_xControlModel.is())
{
Any sCtlLabelBy; // get the "label by" property value of the control if (::comphelper::hasProperty(LABEL_CONTROL_PROPERTY_NAME, m_xControlModel))
{
sCtlLabelBy = m_xControlModel->getPropertyValue(LABEL_CONTROL_PROPERTY_NAME); if( sCtlLabelBy.hasValue() )
{
Reference< XPropertySet > xAsSet (sCtlLabelBy, UNO_QUERY);
AccessibleControlShape* pCtlAccShape = mpParent->GetAccControlShapeFromModel(xAsSet.get()); return pCtlAccShape;
}
}
} return nullptr;
}
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