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Diffstat (limited to 'winaccessibility/source/service/AccDescendantManagerEventListener.cxx')
-rw-r--r-- | winaccessibility/source/service/AccDescendantManagerEventListener.cxx | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/winaccessibility/source/service/AccDescendantManagerEventListener.cxx b/winaccessibility/source/service/AccDescendantManagerEventListener.cxx new file mode 100644 index 000000000..c38f19e32 --- /dev/null +++ b/winaccessibility/source/service/AccDescendantManagerEventListener.cxx @@ -0,0 +1,237 @@ +/* -*- 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 <com/sun/star/accessibility/XAccessible.hpp> +#include <com/sun/star/accessibility/AccessibleStateType.hpp> +#include <com/sun/star/accessibility/AccessibleEventId.hpp> +#include <com/sun/star/accessibility/AccessibleRole.hpp> +#include <com/sun/star/accessibility/XAccessibleEventBroadcaster.hpp> + +#include <vcl/svapp.hxx> + +#include <AccDescendantManagerEventListener.hxx> +#include <AccObjectManagerAgent.hxx> +#include <unomsaaevent.hxx> + +using namespace com::sun::star::uno; +using namespace com::sun::star::accessibility; + +AccDescendantManagerEventListener::AccDescendantManagerEventListener(css::accessibility::XAccessible* pAcc, AccObjectManagerAgent* Agent) + : AccComponentEventListener(pAcc, Agent) +{ +} + +AccDescendantManagerEventListener::~AccDescendantManagerEventListener() +{ +} + +/** + * Uno's event notifier when event is captured + * @param AccessibleEventObject the event object which contains information about event + */ +void AccDescendantManagerEventListener::notifyEvent( const css::accessibility::AccessibleEventObject& aEvent ) +{ + SolarMutexGuard g; + + switch (aEvent.EventId) + { + case AccessibleEventId::SELECTION_CHANGED: + HandleSelectionChangedEvent(aEvent.OldValue, aEvent.NewValue); + break; + case AccessibleEventId::CHILD: + HandleChildChangedEvent(aEvent.OldValue, aEvent.NewValue); + break; + case AccessibleEventId::ACTIVE_DESCENDANT_CHANGED_NOFOCUS: + HandleChildChangedNoFocusEvent(aEvent.OldValue, aEvent.NewValue); + break; + case AccessibleEventId::SELECTION_CHANGED_ADD: + HandleSelectionChangedAddEvent(aEvent.OldValue, aEvent.NewValue); + break; + case AccessibleEventId::SELECTION_CHANGED_REMOVE: + HandleSelectionChangedRemoveEvent(aEvent.OldValue, aEvent.NewValue); + break; + case AccessibleEventId::SELECTION_CHANGED_WITHIN: + HandleSelectionChangedWithinEvent(aEvent.OldValue, aEvent.NewValue); + break; + default: + AccComponentEventListener::notifyEvent(aEvent); + break; + } +} + +/** + * handle the CHILD event + * @param oldValue the child to be deleted + * @param newValue the child to be added + */ +void AccDescendantManagerEventListener::HandleChildChangedEvent(Any oldValue, Any newValue) +{ + + Reference< XAccessible > xChild; + if( newValue >>= xChild) + { + //create a new child + if(xChild.is()) + { + XAccessible* pAcc = xChild.get(); + pAgent->InsertAccObj(pAcc, m_xAccessible.get()); + pAgent->InsertChildrenAccObj(pAcc); + + pAgent->NotifyAccEvent(UnoMSAAEvent::CHILD_ADDED, pAcc); + + } + } + + if (oldValue >>= xChild) + { + if(xChild.is()) + { + XAccessible* pAcc = xChild.get(); + + pAgent->NotifyAccEvent(UnoMSAAEvent::CHILD_REMOVED, pAcc); + pAgent->DeleteChildrenAccObj( pAcc ); + pAgent->DeleteAccObj( pAcc ); + } + } + +} + +/** + * handle the SELECTION_CHANGED event + */ +void AccDescendantManagerEventListener::HandleSelectionChangedEvent(Any oldValue, Any newValue) +{ + bool bSend =false; + Reference< XAccessible > xChild; + if(newValue >>= xChild ) + { + if(xChild.is()) + { + XAccessible* pAcc = xChild.get(); + //if the Role is the SC cell ,don't add the selected state. + if (pAgent->GetRole(pAcc) != AccessibleRole::TABLE_CELL) + { + pAgent->IncreaseState( pAcc, AccessibleStateType::SELECTED); + } + + pAgent->NotifyAccEvent(UnoMSAAEvent::SELECTION_CHANGED, pAcc); + bSend=true; + } + } + if(oldValue >>= xChild ) + { + if(xChild.is()) + { + XAccessible* pAcc = xChild.get(); + pAgent->DecreaseState( pAcc, AccessibleStateType::SELECTED); + } + } + if (!bSend) + { + pAgent->NotifyAccEvent(UnoMSAAEvent::SELECTION_CHANGED, m_xAccessible.get()); + } +} + + +void AccDescendantManagerEventListener::HandleChildChangedNoFocusEvent(Any oldValue, Any newValue) +{ + Reference< XAccessible > xChild; + if(newValue >>= xChild ) + { + if(xChild.is()) + { + XAccessible* pAcc = xChild.get(); + + pAgent->InsertAccObj(pAcc, m_xAccessible.get()); + pAgent->InsertChildrenAccObj(pAcc); + } + } + if (oldValue >>= xChild) + { + if(xChild.is()) + { + XAccessible* pAcc = xChild.get(); + pAgent->DeleteChildrenAccObj( pAcc ); + pAgent->DeleteAccObj( pAcc ); + } + } +} + +bool AccDescendantManagerEventListener::NotifyChildEvent(UnoMSAAEvent eWinEvent, const Any& Value) +{ + Reference< XAccessible > xChild; + if(Value >>= xChild ) + { + if(xChild.is()) + { + XAccessible* pAcc = xChild.get(); + pAgent->NotifyAccEvent(eWinEvent, pAcc); + + if (pAgent->IsStateManageDescendant(m_xAccessible.get())) + { + if (eWinEvent == UnoMSAAEvent::SELECTION_CHANGED_REMOVE) + { + // The object has just been sent in a SELECTION_CHANGED_REMOVE event + // and accessibility tools may query for the object and call methods on + // it as a response to this. + // Therefore, don't delete the object yet, but remember it for deletion + // once the next event of a different type occurs. + m_aUnselectedChildrenForDeletion.push_back(pAcc); + } + else + { + // handle any pending deletions for objects previously removed from selection + for (XAccessible* pAcc2 : m_aUnselectedChildrenForDeletion) + pAgent->DeleteAccObj(pAcc2); + m_aUnselectedChildrenForDeletion.clear(); + } + } + return true; + } + } + return false; +} +void AccDescendantManagerEventListener::HandleSelectionChangedAddEvent(const Any& /*oldValue*/, const Any &newValue) +{ + if (NotifyChildEvent(UnoMSAAEvent::SELECTION_CHANGED_ADD, newValue)) + { + return ; + } + pAgent->NotifyAccEvent(UnoMSAAEvent::SELECTION_CHANGED_ADD, m_xAccessible.get()); +} + +void AccDescendantManagerEventListener::HandleSelectionChangedRemoveEvent(const Any& /*oldValue*/, const Any &newValue) +{ + if (NotifyChildEvent(UnoMSAAEvent::SELECTION_CHANGED_REMOVE, newValue)) + { + return ; + } + pAgent->NotifyAccEvent(UnoMSAAEvent::SELECTION_CHANGED_REMOVE, m_xAccessible.get()); +} + +void AccDescendantManagerEventListener::HandleSelectionChangedWithinEvent(const Any& /*oldValue*/, const Any &newValue) +{ + if (NotifyChildEvent(UnoMSAAEvent::SELECTION_CHANGED_WITHIN, newValue)) + { + return ; + } + pAgent->NotifyAccEvent(UnoMSAAEvent::SELECTION_CHANGED_WITHIN, m_xAccessible.get()); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |