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office-gobmx/vcl/qt5/QtAccessibleEventListener.cxx
Michael Weghorn 8eacf7e372 qt: Have just a single toQString(const OUString&) 
Move the `toQString` helper function to
include/vcl/qt/QtUtils.hxx where it can be used from
multiple modules, instead of defining
it twice for both, avmedia (avmedia/source/qt6/QtPlayer.cxx)
and vcl (vcl/inc/qt5/QtTools.hxx).

Change-Id: I7ffe06eaa3aaf3e7c8cc7aa1a4ac41b14db5c20c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/175526
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
Tested-by: Jenkins
2024-10-24 09:10:19 +02:00

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/* -*- 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 <QtAccessibleEventListener.hxx>
#include <QtAccessibleRegistry.hxx>
#include <QtTools.hxx>
#include <sal/log.hxx>
#include <com/sun/star/accessibility/AccessibleEventId.hpp>
#include <com/sun/star/accessibility/AccessibleStateType.hpp>
#include <com/sun/star/accessibility/AccessibleTableModelChange.hpp>
#include <com/sun/star/accessibility/AccessibleTableModelChangeType.hpp>
#include <com/sun/star/accessibility/TextSegment.hpp>
#include <vcl/qt/QtUtils.hxx>
#include <QtGui/QAccessible>
#include <QtGui/QAccessibleTextSelectionEvent>
using namespace css;
using namespace css::accessibility;
using namespace css::lang;
using namespace css::uno;
QtAccessibleEventListener::QtAccessibleEventListener(QtAccessibleWidget* pAccessibleWidget)
: m_pAccessibleWidget(pAccessibleWidget)
{
}
void QtAccessibleEventListener::HandleStateChangedEvent(
QAccessibleInterface* pQAccessibleInterface,
const css::accessibility::AccessibleEventObject& rEvent)
{
QAccessible::State aState;
sal_Int64 nState = 0;
rEvent.NewValue >>= nState;
// States in 'QAccessibleStateChangeEvent' indicate what states have changed, so if e.g.
// an object loses focus (not just if it gains it), 'focus' state needs to be set to 'true',
// so retrieve the old/previous value from the event if necessary.
if (nState == AccessibleStateType::INVALID)
rEvent.OldValue >>= nState;
switch (nState)
{
case AccessibleStateType::ACTIVE:
aState.active = true;
break;
case AccessibleStateType::BUSY:
aState.busy = true;
break;
case AccessibleStateType::CHECKABLE:
aState.checkable = true;
break;
case AccessibleStateType::CHECKED:
aState.checked = true;
break;
case AccessibleStateType::COLLAPSE:
aState.collapsed = true;
break;
case AccessibleStateType::DEFAULT:
aState.defaultButton = true;
break;
case AccessibleStateType::ENABLED:
aState.disabled = true;
break;
case AccessibleStateType::EDITABLE:
aState.editable = true;
break;
case AccessibleStateType::EXPANDABLE:
aState.expandable = true;
break;
case AccessibleStateType::EXPANDED:
aState.expanded = true;
break;
case AccessibleStateType::FOCUSABLE:
aState.focusable = true;
break;
case AccessibleStateType::FOCUSED:
aState.focused = true;
break;
case AccessibleStateType::INVALID:
aState.invalid = true;
break;
case AccessibleStateType::VISIBLE:
aState.invisible = true;
break;
case AccessibleStateType::MODAL:
aState.modal = true;
break;
case AccessibleStateType::MOVEABLE:
aState.movable = true;
break;
case AccessibleStateType::MULTI_LINE:
// comment in Qt's qaccessible.h has this:
// "// quint64 singleLine : 1; // we have multi line, this is redundant."
case AccessibleStateType::SINGLE_LINE:
aState.multiLine = true;
break;
case AccessibleStateType::MULTI_SELECTABLE:
aState.multiSelectable = true;
break;
case AccessibleStateType::OFFSCREEN:
aState.offscreen = true;
break;
case AccessibleStateType::PRESSED:
aState.pressed = true;
break;
case AccessibleStateType::RESIZABLE:
aState.sizeable = true;
break;
case AccessibleStateType::SELECTABLE:
aState.selectable = true;
break;
case AccessibleStateType::SELECTED:
aState.selected = true;
break;
case AccessibleStateType::SHOWING:
{
// Qt does not have an equivalent for the SHOWING state,
// but has separate event types
QAccessible::Event eEventType;
sal_Int64 nNewState = 0;
if ((rEvent.NewValue >>= nNewState) && nNewState == AccessibleStateType::SHOWING)
eEventType = QAccessible::ObjectShow;
else
eEventType = QAccessible::ObjectHide;
QAccessibleEvent aEvent(pQAccessibleInterface, eEventType);
QAccessible::updateAccessibility(&aEvent);
break;
}
// These don't seem to have a matching Qt equivalent
case AccessibleStateType::ARMED:
case AccessibleStateType::DEFUNC:
case AccessibleStateType::HORIZONTAL:
case AccessibleStateType::ICONIFIED:
case AccessibleStateType::INDETERMINATE:
case AccessibleStateType::MANAGES_DESCENDANTS:
case AccessibleStateType::OPAQUE:
case AccessibleStateType::SENSITIVE:
case AccessibleStateType::STALE:
case AccessibleStateType::TRANSIENT:
case AccessibleStateType::VERTICAL:
default:
return;
}
QAccessibleStateChangeEvent aEvent(pQAccessibleInterface, aState);
QAccessible::updateAccessibility(&aEvent);
}
void QtAccessibleEventListener::notifyEvent(const css::accessibility::AccessibleEventObject& rEvent)
{
QAccessibleInterface* pQAccessibleInterface = m_pAccessibleWidget;
switch (rEvent.EventId)
{
case AccessibleEventId::NAME_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::NameChanged);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::DESCRIPTION_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::DescriptionChanged);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::ACTION_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::ActionChanged);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::ACTIVE_DESCENDANT_CHANGED:
{
// Qt has a QAccessible::ActiveDescendantChanged event type, but events of
// that type are currently just ignored on Qt side and not forwarded to AT-SPI.
// Send a state change event for the focused state of the newly
// active descendant instead
uno::Reference<accessibility::XAccessible> xActiveAccessible;
rEvent.NewValue >>= xActiveAccessible;
if (!xActiveAccessible.is())
return;
QObject* pQtAcc = QtAccessibleRegistry::getQObject(xActiveAccessible);
QAccessibleInterface* pInterface = QAccessible::queryAccessibleInterface(pQtAcc);
QAccessible::State aState;
aState.focused = true;
QAccessibleStateChangeEvent aEvent(pInterface, aState);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::CARET_CHANGED:
{
sal_Int32 nNewCursorPos = 0;
rEvent.NewValue >>= nNewCursorPos;
QAccessibleTextCursorEvent aEvent(pQAccessibleInterface, nNewCursorPos);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::CHILD:
{
Reference<XAccessible> xChild;
if (rEvent.NewValue >>= xChild)
{
assert(xChild.is()
&& "AccessibleEventId::CHILD event NewValue without valid child set");
// tdf#159213 for now, workaround invalid events being sent and don't crash in release builds
if (!xChild.is())
return;
QAccessibleEvent aEvent(QtAccessibleRegistry::getQObject(xChild),
QAccessible::ObjectCreated);
QAccessible::updateAccessibility(&aEvent);
return;
}
if (rEvent.OldValue >>= xChild)
{
assert(xChild.is()
&& "AccessibleEventId::CHILD event OldValue without valid child set");
// tdf#159213 for now, workaround invalid events being sent and don't crash in release builds
if (!xChild.is())
return;
QAccessibleEvent aEvent(QtAccessibleRegistry::getQObject(xChild),
QAccessible::ObjectDestroyed);
QAccessible::updateAccessibility(&aEvent);
return;
}
SAL_WARN("vcl.qt",
"Ignoring invalid AccessibleEventId::CHILD event without any child set.");
return;
}
case AccessibleEventId::HYPERTEXT_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::HypertextChanged);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::SELECTION_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::Selection);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::VISIBLE_DATA_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::VisibleDataChanged);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::TEXT_SELECTION_CHANGED:
{
QAccessibleTextInterface* pTextInterface = pQAccessibleInterface->textInterface();
if (!pTextInterface)
{
SAL_WARN("vcl.qt", "TEXT_SELECTION_CHANGED event received for object not "
"implementing text interface");
return;
}
int nStartOffset = 0;
int nEndOffset = 0;
pTextInterface->selection(0, &nStartOffset, &nEndOffset);
QAccessibleTextSelectionEvent aEvent(pQAccessibleInterface, nStartOffset, nEndOffset);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::TEXT_ATTRIBUTE_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::AttributeChanged);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::TEXT_CHANGED:
{
TextSegment aDeletedText;
TextSegment aInsertedText;
if (rEvent.OldValue >>= aDeletedText)
{
QAccessibleTextRemoveEvent aEvent(pQAccessibleInterface, aDeletedText.SegmentStart,
toQString(aDeletedText.SegmentText));
QAccessible::updateAccessibility(&aEvent);
}
if (rEvent.NewValue >>= aInsertedText)
{
QAccessibleTextInsertEvent aEvent(pQAccessibleInterface, aInsertedText.SegmentStart,
toQString(aInsertedText.SegmentText));
QAccessible::updateAccessibility(&aEvent);
}
return;
}
case AccessibleEventId::TABLE_CAPTION_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::TableCaptionChanged);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::TABLE_COLUMN_DESCRIPTION_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface,
QAccessible::TableColumnDescriptionChanged);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::TABLE_COLUMN_HEADER_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::TableColumnHeaderChanged);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::TABLE_MODEL_CHANGED:
{
AccessibleTableModelChange aChange;
rEvent.NewValue >>= aChange;
QAccessibleTableModelChangeEvent::ModelChangeType nType;
switch (aChange.Type)
{
case AccessibleTableModelChangeType::COLUMNS_INSERTED:
nType = QAccessibleTableModelChangeEvent::ColumnsInserted;
break;
case AccessibleTableModelChangeType::COLUMNS_REMOVED:
nType = QAccessibleTableModelChangeEvent::ColumnsRemoved;
break;
case AccessibleTableModelChangeType::ROWS_INSERTED:
nType = QAccessibleTableModelChangeEvent::RowsInserted;
break;
case AccessibleTableModelChangeType::ROWS_REMOVED:
nType = QAccessibleTableModelChangeEvent::RowsRemoved;
break;
case AccessibleTableModelChangeType::UPDATE:
nType = QAccessibleTableModelChangeEvent::DataChanged;
break;
default:
assert(false && "Unhandled AccessibleTableModelChangeType");
return;
}
QAccessibleTableModelChangeEvent aTableEvent(pQAccessibleInterface, nType);
aTableEvent.setFirstRow(aChange.FirstRow);
aTableEvent.setLastRow(aChange.LastRow);
aTableEvent.setFirstColumn(aChange.FirstColumn);
aTableEvent.setLastColumn(aChange.LastColumn);
QAccessible::updateAccessibility(&aTableEvent);
return;
}
case AccessibleEventId::TABLE_ROW_DESCRIPTION_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::TableRowDescriptionChanged);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::TABLE_ROW_HEADER_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::TableRowHeaderChanged);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::TABLE_SUMMARY_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::TableSummaryChanged);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::SELECTION_CHANGED_ADD:
case AccessibleEventId::SELECTION_CHANGED_REMOVE:
{
QAccessible::Event eEventType;
if (rEvent.EventId == AccessibleEventId::SELECTION_CHANGED_ADD)
eEventType = QAccessible::SelectionAdd;
else
eEventType = QAccessible::SelectionRemove;
uno::Reference<accessibility::XAccessible> xChildAcc;
rEvent.NewValue >>= xChildAcc;
if (!xChildAcc.is())
{
SAL_WARN("vcl.qt",
"Selection add/remove event without the (un)selected accessible set");
return;
}
Reference<XAccessibleContext> xContext = xChildAcc->getAccessibleContext();
if (!xContext.is())
{
SAL_WARN("vcl.qt", "No valid XAccessibleContext for (un)selected accessible.");
return;
}
// Qt expects the event to be sent for the (un)selected child
QObject* pChildObject = QtAccessibleRegistry::getQObject(xChildAcc);
assert(pChildObject);
QAccessibleEvent aEvent(pChildObject, eEventType);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::SELECTION_CHANGED_WITHIN:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::SelectionWithin);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::PAGE_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::PageChanged);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::SECTION_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::SectionChanged);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::COLUMN_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::TextColumnChanged);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::BOUNDRECT_CHANGED:
{
QAccessibleEvent aEvent(pQAccessibleInterface, QAccessible::LocationChanged);
QAccessible::updateAccessibility(&aEvent);
return;
}
case AccessibleEventId::STATE_CHANGED:
HandleStateChangedEvent(pQAccessibleInterface, rEvent);
return;
case AccessibleEventId::VALUE_CHANGED:
{
QAccessibleValueInterface* pValueInterface = pQAccessibleInterface->valueInterface();
if (pValueInterface)
{
const QVariant aValue = pValueInterface->currentValue();
QAccessibleValueChangeEvent aEvent(pQAccessibleInterface, aValue);
QAccessible::updateAccessibility(&aEvent);
}
return;
}
case AccessibleEventId::ROLE_CHANGED:
case AccessibleEventId::INVALIDATE_ALL_CHILDREN:
case AccessibleEventId::CONTENT_FLOWS_FROM_RELATION_CHANGED:
case AccessibleEventId::CONTENT_FLOWS_TO_RELATION_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::MEMBER_OF_RELATION_CHANGED:
case AccessibleEventId::SUB_WINDOW_OF_RELATION_CHANGED:
case AccessibleEventId::LISTBOX_ENTRY_EXPANDED:
case AccessibleEventId::LISTBOX_ENTRY_COLLAPSED:
case AccessibleEventId::ACTIVE_DESCENDANT_CHANGED_NOFOCUS:
default:
SAL_WARN("vcl.qt", "Unmapped AccessibleEventId: " << rEvent.EventId);
return;
}
}
void QtAccessibleEventListener::disposing(const EventObject& /* Source */)
{
assert(m_pAccessibleWidget);
m_pAccessibleWidget->invalidate();
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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