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671b8cad97
The helper class used to implement less functionality
in the past and was used less than it is now.
But by now it is the central helper/base class used
by most a11y classes.
Since
commit 22049f633b
Author: Michael Weghorn <m.weghorn@posteo.de>
Date: Mon May 26 12:24:52 2025 +0200
vcl a11y: Let OAccessibleComponentHelper implement XAccessible
it also implements the XAccessible interface.
That will allow to switch parameters and class members
from the abstract XAccessible interface to using this
more concrete C++ base class in various places.
Rename the class to OAccessible to account for the
new responsibilities, and adjust its doc accordingly.
Renaming source and header file will be done in a
separate commit to simplify (git) keeping track.
Change-Id: I33210b47cda5f71820a3c0fa657e4c3548d45732
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/186952
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
684 lines
20 KiB
C++
684 lines
20 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <AccessibleBase.hxx>
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#include "AccessibleChartShape.hxx"
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#include <ObjectHierarchy.hxx>
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#include <ObjectIdentifier.hxx>
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#include <ChartView.hxx>
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#include <ChartController.hxx>
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#include <com/sun/star/accessibility/AccessibleEventId.hpp>
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#include <com/sun/star/accessibility/AccessibleStateType.hpp>
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#include <com/sun/star/accessibility/AccessibleRole.hpp>
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#include <com/sun/star/drawing/LineStyle.hpp>
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#include <com/sun/star/drawing/FillStyle.hpp>
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#include <com/sun/star/lang/IndexOutOfBoundsException.hpp>
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#include <sal/log.hxx>
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#include <utility>
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#include <vcl/svapp.hxx>
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#include <cppuhelper/supportsservice.hxx>
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#include <i18nlangtag/languagetag.hxx>
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#include <toolkit/helper/vclunohelper.hxx>
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#include <vcl/window.hxx>
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#include <vcl/settings.hxx>
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#include <o3tl/functional.hxx>
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#include <o3tl/safeint.hxx>
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#include <comphelper/diagnose_ex.hxx>
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#include <algorithm>
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#include <iterator>
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#include "ChartElementFactory.hxx"
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using namespace ::com::sun::star;
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using namespace ::com::sun::star::accessibility;
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using ::com::sun::star::uno::UNO_QUERY;
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using ::com::sun::star::uno::Reference;
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using ::osl::MutexGuard;
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using ::osl::ClearableMutexGuard;
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using ::com::sun::star::uno::Any;
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namespace chart
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{
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/** @param bMayHaveChildren is false per default
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*/
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AccessibleBase::AccessibleBase(
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AccessibleElementInfo aAccInfo,
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bool bMayHaveChildren,
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bool bAlwaysTransparent /* default: false */ ) :
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m_bMayHaveChildren( bMayHaveChildren ),
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m_bChildrenInitialized( false ),
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m_nStateSet( 0 ),
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m_aAccInfo(std::move( aAccInfo )),
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m_bAlwaysTransparent( bAlwaysTransparent ),
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m_bStateSetInitialized( false )
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{
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// initialize some states
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m_nStateSet |= AccessibleStateType::ENABLED;
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m_nStateSet |= AccessibleStateType::SHOWING;
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m_nStateSet |= AccessibleStateType::VISIBLE;
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m_nStateSet |= AccessibleStateType::SELECTABLE;
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m_nStateSet |= AccessibleStateType::FOCUSABLE;
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}
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AccessibleBase::~AccessibleBase()
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{
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OSL_ASSERT(!isAlive());
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}
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bool AccessibleBase::NotifyEvent( EventType eEventType, const AccessibleUniqueId & rId )
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{
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if( GetId() == rId )
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{
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// event is addressed to this object
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css::uno::Any aEmpty;
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css::uno::Any aSelected;
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aSelected <<= AccessibleStateType::SELECTED;
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switch( eEventType )
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{
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case EventType::GOT_SELECTION:
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{
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AddState( AccessibleStateType::SELECTED );
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NotifyAccessibleEvent(AccessibleEventId::STATE_CHANGED, aEmpty, aSelected);
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AddState( AccessibleStateType::FOCUSED );
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aSelected <<= AccessibleStateType::FOCUSED;
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NotifyAccessibleEvent(AccessibleEventId::STATE_CHANGED, aEmpty, aSelected);
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SAL_INFO("chart2.accessibility", "Selection acquired by: " << getAccessibleName());
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}
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break;
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case EventType::LOST_SELECTION:
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{
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RemoveState( AccessibleStateType::SELECTED );
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NotifyAccessibleEvent(AccessibleEventId::STATE_CHANGED, aSelected, aEmpty);
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AddState( AccessibleStateType::FOCUSED );
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aSelected <<= AccessibleStateType::FOCUSED;
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NotifyAccessibleEvent(AccessibleEventId::STATE_CHANGED, aSelected, aEmpty);
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SAL_INFO("chart2.accessibility", "Selection lost by: " << getAccessibleName());
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}
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break;
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}
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return true;
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}
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else if( m_bMayHaveChildren )
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{
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bool bStop = false;
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ClearableMutexGuard aGuard( m_aMutex );
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// make local copy for notification
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std::vector<rtl::Reference<AccessibleBase>> aLocalChildList(m_aChildList);
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aGuard.clear();
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for (auto const& localChild : aLocalChildList)
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{
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bStop = localChild->NotifyEvent(eEventType, rId);
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if (bStop)
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break;
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}
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return bStop;
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}
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return false;
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}
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void AccessibleBase::AddState( sal_Int64 aState )
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{
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ensureAlive();
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m_nStateSet |= aState;
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}
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void AccessibleBase::RemoveState( sal_Int64 aState )
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{
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ensureAlive();
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m_nStateSet &= ~aState;
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}
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bool AccessibleBase::UpdateChildren()
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{
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bool bMustUpdateChildren = false;
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{
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MutexGuard aGuard( m_aMutex );
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if (!m_bMayHaveChildren || !isAlive())
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return false;
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bMustUpdateChildren = ( m_bMayHaveChildren &&
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! m_bChildrenInitialized );
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}
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// update unguarded
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if( bMustUpdateChildren )
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m_bChildrenInitialized = ImplUpdateChildren();
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return m_bChildrenInitialized;
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}
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bool AccessibleBase::ImplUpdateChildren()
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{
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bool bResult = false;
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if( m_aAccInfo.m_spObjectHierarchy )
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{
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ObjectHierarchy::tChildContainer aModelChildren(
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m_aAccInfo.m_spObjectHierarchy->getChildren( GetId() ));
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std::vector< ChildOIDMap::key_type > aAccChildren;
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aAccChildren.reserve( aModelChildren.size());
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std::transform( m_aChildOIDMap.begin(), m_aChildOIDMap.end(),
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std::back_inserter( aAccChildren ),
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::o3tl::select1st< ChildOIDMap::value_type >() );
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std::sort( aModelChildren.begin(), aModelChildren.end());
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std::vector< ObjectIdentifier > aChildrenToRemove, aChildrenToAdd;
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std::set_difference( aModelChildren.begin(), aModelChildren.end(),
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aAccChildren.begin(), aAccChildren.end(),
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std::back_inserter( aChildrenToAdd ));
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std::set_difference( aAccChildren.begin(), aAccChildren.end(),
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aModelChildren.begin(), aModelChildren.end(),
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std::back_inserter( aChildrenToRemove ));
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for (auto const& childToRemove : aChildrenToRemove)
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{
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RemoveChildByOId(childToRemove);
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}
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AccessibleElementInfo aAccInfo( GetInfo());
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aAccInfo.m_pParent = this;
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for (auto const& childToAdd : aChildrenToAdd)
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{
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aAccInfo.m_aOID = childToAdd;
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if ( childToAdd.isAutoGeneratedObject() )
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{
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AddChild( ChartElementFactory::CreateChartElement( aAccInfo ).get() );
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}
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else if ( childToAdd.isAdditionalShape() )
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{
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AddChild( new AccessibleChartShape( aAccInfo ) );
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}
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}
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bResult = true;
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}
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return bResult;
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}
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void AccessibleBase::AddChild( AccessibleBase * pChild )
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{
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OSL_ENSURE( pChild != nullptr, "Invalid Child" );
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if( !pChild )
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return;
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ClearableMutexGuard aGuard( m_aMutex );
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rtl::Reference<AccessibleBase> xChild(pChild);
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m_aChildList.push_back( xChild );
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m_aChildOIDMap[ pChild->GetId() ] = xChild;
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// inform listeners of new child
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if( m_bChildrenInitialized )
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{
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Any aEmpty, aNew;
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aNew <<= uno::Reference<XAccessible>(xChild);
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aGuard.clear();
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NotifyAccessibleEvent(AccessibleEventId::CHILD, aEmpty, aNew);
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}
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}
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void AccessibleBase::RemoveChildByOId( const ObjectIdentifier& rOId )
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{
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ClearableMutexGuard aGuard( m_aMutex );
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ChildOIDMap::iterator aIt( m_aChildOIDMap.find( rOId ));
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if( aIt == m_aChildOIDMap.end())
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return;
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rtl::Reference<AccessibleBase> xChild(aIt->second);
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// remove from map
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m_aChildOIDMap.erase( aIt );
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// search child in vector
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auto aVecIter = std::find(m_aChildList.begin(), m_aChildList.end(), xChild);
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OSL_ENSURE( aVecIter != m_aChildList.end(),
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"Inconsistent ChildMap" );
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// remove child from vector
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m_aChildList.erase( aVecIter );
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bool bInitialized = m_bChildrenInitialized;
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// call listeners unguarded
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aGuard.clear();
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// inform listeners of removed child
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if( bInitialized )
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{
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Any aEmpty, aOld;
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aOld <<= uno::Reference<XAccessible>(xChild);
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NotifyAccessibleEvent(AccessibleEventId::CHILD, aOld, aEmpty);
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}
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// dispose the child
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if (xChild.is())
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xChild->dispose();
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}
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awt::Point AccessibleBase::GetUpperLeftOnScreen() const
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{
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awt::Point aResult;
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if( m_aAccInfo.m_pParent )
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{
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ClearableMutexGuard aGuard( m_aMutex );
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AccessibleBase * pParent = m_aAccInfo.m_pParent;
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aGuard.clear();
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if( pParent )
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{
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aResult = pParent->GetUpperLeftOnScreen();
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}
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else
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OSL_FAIL( "Default position used is probably incorrect." );
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}
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return aResult;
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}
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void AccessibleBase::KillAllChildren()
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{
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ClearableMutexGuard aGuard( m_aMutex );
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// make local copy for notification, and remove all children
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std::vector<rtl::Reference<AccessibleBase>> aLocalChildList;
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aLocalChildList.swap( m_aChildList );
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m_aChildOIDMap.clear();
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aGuard.clear();
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// call dispose for all children
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// and notify listeners
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Any aEmpty, aOld;
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for (auto const& localChild : aLocalChildList)
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{
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aOld <<= uno::Reference<XAccessible>(localChild);
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NotifyAccessibleEvent(AccessibleEventId::CHILD, aOld, aEmpty);
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if (localChild.is())
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localChild->dispose();
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}
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m_bChildrenInitialized = false;
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}
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void AccessibleBase::SetInfo( const AccessibleElementInfo & rNewInfo )
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{
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m_aAccInfo = rNewInfo;
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if( m_bMayHaveChildren )
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{
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KillAllChildren();
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}
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NotifyAccessibleEvent(AccessibleEventId::INVALIDATE_ALL_CHILDREN, uno::Any(), uno::Any());
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}
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// ________ (XComponent::dispose) ________
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void SAL_CALL AccessibleBase::disposing()
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{
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{
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MutexGuard aGuard(m_aMutex);
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OSL_ENSURE(isAlive(), "dispose() called twice");
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OAccessible::disposing();
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// reset pointers
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m_aAccInfo.m_pWindow.reset();
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m_aAccInfo.m_pParent = nullptr;
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m_nStateSet = AccessibleStateType::DEFUNC;
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}
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// call listeners unguarded
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if( m_bMayHaveChildren )
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{
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KillAllChildren();
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}
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else
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OSL_ENSURE( m_aChildList.empty(), "Child list should be empty" );
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}
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// ________ AccessibleBase::XAccessibleContext ________
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sal_Int64 SAL_CALL AccessibleBase::getAccessibleChildCount()
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{
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ClearableMutexGuard aGuard( m_aMutex );
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if (!m_bMayHaveChildren || !isAlive())
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return 0;
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bool bMustUpdateChildren = ( m_bMayHaveChildren &&
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! m_bChildrenInitialized );
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aGuard.clear();
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// update unguarded
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if( bMustUpdateChildren )
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UpdateChildren();
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return ImplGetAccessibleChildCount();
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}
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sal_Int64 AccessibleBase::ImplGetAccessibleChildCount() const
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{
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return m_aChildList.size();
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}
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Reference< XAccessible > SAL_CALL AccessibleBase::getAccessibleChild( sal_Int64 i )
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{
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ensureAlive();
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Reference< XAccessible > xResult;
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ClearableMutexGuard aGuard( m_aMutex );
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bool bMustUpdateChildren = ( m_bMayHaveChildren &&
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! m_bChildrenInitialized );
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aGuard.clear();
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if( bMustUpdateChildren )
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UpdateChildren();
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xResult.set( ImplGetAccessibleChildById( i ));
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return xResult;
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}
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Reference< XAccessible > AccessibleBase::ImplGetAccessibleChildById( sal_Int64 i ) const
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{
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rtl::Reference<AccessibleBase> xResult;
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MutexGuard aGuard( m_aMutex);
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if( ! m_bMayHaveChildren ||
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i < 0 ||
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o3tl::make_unsigned( i ) >= m_aChildList.size() )
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{
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OUString aBuf = "Index " + OUString::number( i ) + " is invalid for range [ 0, " +
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OUString::number( m_aChildList.size() - 1 ) +
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" ]";
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lang::IndexOutOfBoundsException aEx( aBuf,
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const_cast< ::cppu::OWeakObject * >(
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static_cast< const ::cppu::OWeakObject * >( this )));
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throw aEx;
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}
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else
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xResult = m_aChildList[i];
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return xResult;
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}
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Reference< XAccessible > SAL_CALL AccessibleBase::getAccessibleParent()
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{
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ensureAlive();
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Reference< XAccessible > aResult;
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if( m_aAccInfo.m_pParent )
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aResult.set( m_aAccInfo.m_pParent );
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return aResult;
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}
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sal_Int64 SAL_CALL AccessibleBase::getAccessibleIndexInParent()
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{
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ensureAlive();
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if( m_aAccInfo.m_spObjectHierarchy )
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return m_aAccInfo.m_spObjectHierarchy->getIndexInParent( GetId() );
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return -1;
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}
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sal_Int16 SAL_CALL AccessibleBase::getAccessibleRole()
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{
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return AccessibleRole::SHAPE;
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}
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Reference< XAccessibleRelationSet > SAL_CALL AccessibleBase::getAccessibleRelationSet()
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{
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Reference< XAccessibleRelationSet > aResult;
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return aResult;
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}
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sal_Int64 SAL_CALL AccessibleBase::getAccessibleStateSet()
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{
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if( ! m_bStateSetInitialized )
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{
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rtl::Reference< ::chart::ChartController > xSelSupp( GetInfo().m_xChartController );
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if ( xSelSupp.is() )
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{
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ObjectIdentifier aOID( xSelSupp->getSelection() );
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if ( aOID.isValid() && GetId() == aOID )
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{
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AddState( AccessibleStateType::SELECTED );
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AddState( AccessibleStateType::FOCUSED );
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}
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}
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m_bStateSetInitialized = true;
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}
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return m_nStateSet;
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}
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lang::Locale SAL_CALL AccessibleBase::getLocale()
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{
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ensureAlive();
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return Application::GetSettings().GetLanguageTag().getLocale();
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}
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// ________ AccessibleBase::XAccessibleComponent ________
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Reference< XAccessible > SAL_CALL AccessibleBase::getAccessibleAtPoint( const awt::Point& aPoint )
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{
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ensureAlive();
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rtl::Reference< AccessibleBase > aResult;
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awt::Rectangle aRect( implGetBounds());
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// children are positioned relative to this object, so translate bound rect
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aRect.X = 0;
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aRect.Y = 0;
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// children must be inside the own bound rect
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if( ( aRect.X <= aPoint.X && aPoint.X <= (aRect.X + aRect.Width) ) &&
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( aRect.Y <= aPoint.Y && aPoint.Y <= (aRect.Y + aRect.Height)))
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{
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ClearableMutexGuard aGuard( m_aMutex );
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std::vector<rtl::Reference<AccessibleBase>> aLocalChildList(m_aChildList);
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aGuard.clear();
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for (const rtl::Reference<AccessibleBase>& xLocalChild : aLocalChildList)
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{
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if (xLocalChild.is())
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{
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aRect = xLocalChild->implGetBounds();
|
|
if( ( aRect.X <= aPoint.X && aPoint.X <= (aRect.X + aRect.Width) ) &&
|
|
( aRect.Y <= aPoint.Y && aPoint.Y <= (aRect.Y + aRect.Height)))
|
|
{
|
|
aResult = xLocalChild;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return aResult;
|
|
}
|
|
|
|
css::awt::Rectangle AccessibleBase::implGetBounds()
|
|
{
|
|
rtl::Reference<ChartView> pChartView = m_aAccInfo.m_xView.get();
|
|
if( pChartView )
|
|
{
|
|
VclPtr<vcl::Window> pWindow = m_aAccInfo.m_pWindow;
|
|
awt::Rectangle aLogicRect( pChartView->getRectangleOfObject( m_aAccInfo.m_aOID.getObjectCID() ));
|
|
if( pWindow )
|
|
{
|
|
tools::Rectangle aRect( aLogicRect.X, aLogicRect.Y,
|
|
aLogicRect.X + aLogicRect.Width,
|
|
aLogicRect.Y + aLogicRect.Height );
|
|
SolarMutexGuard aSolarGuard;
|
|
aRect = pWindow->LogicToPixel( aRect );
|
|
|
|
// aLogicRect is relative to the page, but we need a value relative
|
|
// to the parent object
|
|
awt::Point aParentLocOnScreen;
|
|
uno::Reference< XAccessibleComponent > xParent( getAccessibleParent(), uno::UNO_QUERY );
|
|
if( xParent.is() )
|
|
aParentLocOnScreen = xParent->getLocationOnScreen();
|
|
|
|
awt::Point aULOnScreen = GetUpperLeftOnScreen();
|
|
awt::Point aOffset( aParentLocOnScreen.X - aULOnScreen.X,
|
|
aParentLocOnScreen.Y - aULOnScreen.Y );
|
|
|
|
return awt::Rectangle( aRect.Left() - aOffset.X, aRect.Top() - aOffset.Y,
|
|
aRect.getOpenWidth(), aRect.getOpenHeight());
|
|
}
|
|
}
|
|
|
|
return awt::Rectangle();
|
|
}
|
|
|
|
void SAL_CALL AccessibleBase::grabFocus()
|
|
{
|
|
ensureAlive();
|
|
|
|
rtl::Reference< ::chart::ChartController > xSelSupp( GetInfo().m_xChartController );
|
|
if ( xSelSupp.is() )
|
|
{
|
|
xSelSupp->select( GetId().getAny() );
|
|
}
|
|
}
|
|
|
|
sal_Int32 SAL_CALL AccessibleBase::getForeground()
|
|
{
|
|
return sal_Int32(getColor( ACC_BASE_FOREGROUND ));
|
|
}
|
|
|
|
sal_Int32 SAL_CALL AccessibleBase::getBackground()
|
|
{
|
|
return sal_Int32(getColor( ACC_BASE_BACKGROUND ));
|
|
}
|
|
|
|
Color AccessibleBase::getColor( eColorType eColType )
|
|
{
|
|
Color nResult = COL_TRANSPARENT;
|
|
if( m_bAlwaysTransparent )
|
|
return nResult;
|
|
|
|
ObjectIdentifier aOID( m_aAccInfo.m_aOID );
|
|
ObjectType eType( aOID.getObjectType() );
|
|
Reference< beans::XPropertySet > xObjProp;
|
|
OUString aObjectCID = aOID.getObjectCID();
|
|
if( eType == OBJECTTYPE_LEGEND_ENTRY )
|
|
{
|
|
// for colors get the data series/point properties
|
|
std::u16string_view aParentParticle( ObjectIdentifier::getFullParentParticle( aObjectCID ));
|
|
aObjectCID = ObjectIdentifier::createClassifiedIdentifierForParticle( aParentParticle );
|
|
}
|
|
|
|
xObjProp =
|
|
ObjectIdentifier::getObjectPropertySet(
|
|
aObjectCID, m_aAccInfo.m_xChartDocument );
|
|
if( xObjProp.is())
|
|
{
|
|
try
|
|
{
|
|
OUString aPropName;
|
|
OUString aStylePropName;
|
|
|
|
switch( eType )
|
|
{
|
|
case OBJECTTYPE_LEGEND_ENTRY:
|
|
case OBJECTTYPE_DATA_SERIES:
|
|
case OBJECTTYPE_DATA_POINT:
|
|
if( eColType == ACC_BASE_FOREGROUND )
|
|
{
|
|
aPropName = "BorderColor";
|
|
aStylePropName = "BorderTransparency";
|
|
}
|
|
else
|
|
{
|
|
aPropName = "Color";
|
|
aStylePropName = "Transparency";
|
|
}
|
|
break;
|
|
default:
|
|
if( eColType == ACC_BASE_FOREGROUND )
|
|
{
|
|
aPropName = "LineColor";
|
|
aStylePropName = "LineTransparence";
|
|
}
|
|
else
|
|
{
|
|
aPropName = "FillColor";
|
|
aStylePropName = "FillTransparence";
|
|
}
|
|
break;
|
|
}
|
|
|
|
bool bTransparent = m_bAlwaysTransparent;
|
|
Reference< beans::XPropertySetInfo > xInfo = xObjProp->getPropertySetInfo();
|
|
if( xInfo.is() &&
|
|
xInfo->hasPropertyByName( aStylePropName ))
|
|
{
|
|
if( eColType == ACC_BASE_FOREGROUND )
|
|
{
|
|
drawing::LineStyle aLStyle = drawing::LineStyle_SOLID;
|
|
if( xObjProp->getPropertyValue( aStylePropName ) >>= aLStyle )
|
|
bTransparent = (aLStyle == drawing::LineStyle_NONE);
|
|
}
|
|
else
|
|
{
|
|
drawing::FillStyle aFStyle = drawing::FillStyle_SOLID;
|
|
if( xObjProp->getPropertyValue( aStylePropName ) >>= aFStyle )
|
|
bTransparent = (aFStyle == drawing::FillStyle_NONE);
|
|
}
|
|
}
|
|
|
|
if( !bTransparent &&
|
|
xInfo.is() &&
|
|
xInfo->hasPropertyByName( aPropName ))
|
|
{
|
|
xObjProp->getPropertyValue( aPropName ) >>= nResult;
|
|
}
|
|
}
|
|
catch( const uno::Exception & )
|
|
{
|
|
DBG_UNHANDLED_EXCEPTION("chart2");
|
|
}
|
|
}
|
|
|
|
return nResult;
|
|
}
|
|
|
|
} // namespace chart
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|