3a9d36d49d
Let `QtAccessibleWidget::interface_cast` only
return a pointer to self if the underlying accessible
(`m_xAccessible`)'s context implements the `XAccessible...`
interface needed to have the corresponding `QAccessible...Interface`
methods do anything useful (s.a. the checks at the beginning of
the implementations of the corresponding
`QAccessible...Interface` methods).
This way, the other interfaces (or their AT-SPI equivalents)
are no longer advertised as supported.
(See the corresponding handling of the "GetInterfaces"
AT-SPI method inside of the Qt library [1].)
While at it, also add/adjust the comments indicating what
methods override those from `QAccessibleTable{,Cell}Interface`.
I ran into this when clicking through the LO a11y hierarchy
in the Accerciser tree view and seeing the following warning
in the terminal from which I had started Accerciser, after
clicking on an item that was in no way related to any table
in the first place:
> (accerciser:192270): dbind-WARNING **: 14:05:51.582: atspi_dbus_get_property: expected a variant when fetching Caption from interface org.a11y.atspi.Table; got (so)
With this change in place, unsupported interfaces are
grayed out in Accerciser's "Interface Viewer" as
expected, rather than being shown as active, but not
displaying any useful data.
[1] https://code.qt.io/cgit/qt/qtbase.git/tree/src/gui/accessible/linux/atspiadaptor.cpp?h=6.3.0#n1408
Change-Id: I1edbd451514253392e6b0a9caa6ffef2f789b55c
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/136782
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
168 lines
7 KiB
C++
168 lines
7 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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#pragma once
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#include <vclpluginapi.h>
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#include <QtCore/QObject>
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#include <QtCore/QPair>
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#include <QtCore/QString>
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#include <QtCore/QStringList>
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#include <QtCore/QVector>
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#include <QtGui/QAccessible>
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#include <QtGui/QAccessibleActionInterface>
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#include <QtGui/QAccessibleInterface>
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#include <QtGui/QAccessibleTableCellInterface>
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#include <QtGui/QAccessibleTableInterface>
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#include <QtGui/QAccessibleTextInterface>
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#include <QtGui/QAccessibleValueInterface>
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#include <QtGui/QColor>
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#include <QtGui/QWindow>
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#include <com/sun/star/accessibility/XAccessible.hpp>
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namespace com::sun::star::accessibility
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{
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class XAccessibleTable;
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}
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class QtFrame;
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class QtWidget;
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class QtAccessibleWidget final : public QObject,
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public QAccessibleInterface,
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public QAccessibleActionInterface,
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public QAccessibleTextInterface,
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public QAccessibleEditableTextInterface,
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public QAccessibleTableCellInterface,
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public QAccessibleTableInterface,
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public QAccessibleValueInterface
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{
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Q_OBJECT
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public:
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QtAccessibleWidget(const css::uno::Reference<css::accessibility::XAccessible> xAccessible,
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QObject* pObject);
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QWindow* window() const override;
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int childCount() const override;
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int indexOfChild(const QAccessibleInterface* child) const override;
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QVector<QPair<QAccessibleInterface*, QAccessible::Relation>>
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relations(QAccessible::Relation match = QAccessible::AllRelations) const override;
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QAccessibleInterface* focusChild() const override;
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QRect rect() const override;
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QAccessibleInterface* parent() const override;
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QAccessibleInterface* child(int index) const override;
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QString text(QAccessible::Text t) const override;
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QAccessible::Role role() const override;
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QAccessible::State state() const override;
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QColor foregroundColor() const override;
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QColor backgroundColor() const override;
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bool isValid() const override;
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QObject* object() const override;
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void setText(QAccessible::Text t, const QString& text) override;
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QAccessibleInterface* childAt(int x, int y) const override;
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void* interface_cast(QAccessible::InterfaceType t) override;
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// QAccessibleActionInterface
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QStringList actionNames() const override;
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void doAction(const QString& actionName) override;
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QStringList keyBindingsForAction(const QString& actionName) const override;
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// QAccessibleTextInterface
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void addSelection(int startOffset, int endOffset) override;
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QString attributes(int offset, int* startOffset, int* endOffset) const override;
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int characterCount() const override;
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QRect characterRect(int offset) const override;
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int cursorPosition() const override;
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int offsetAtPoint(const QPoint& point) const override;
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void removeSelection(int selectionIndex) override;
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void scrollToSubstring(int startIndex, int endIndex) override;
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void selection(int selectionIndex, int* startOffset, int* endOffset) const override;
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int selectionCount() const override;
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void setCursorPosition(int position) override;
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void setSelection(int selectionIndex, int startOffset, int endOffset) override;
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QString text(int startOffset, int endOffset) const override;
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QString textAfterOffset(int offset, QAccessible::TextBoundaryType boundaryType,
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int* startOffset, int* endOffset) const override;
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QString textAtOffset(int offset, QAccessible::TextBoundaryType boundaryType, int* startOffset,
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int* endOffset) const override;
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QString textBeforeOffset(int offset, QAccessible::TextBoundaryType boundaryType,
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int* startOffset, int* endOffset) const override;
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// QAccessibleEditableTextInterface
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virtual void deleteText(int startOffset, int endOffset) override;
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virtual void insertText(int offset, const QString& text) override;
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virtual void replaceText(int startOffset, int endOffset, const QString& text) override;
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// QAccessibleValueInterface
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QVariant currentValue() const override;
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QVariant maximumValue() const override;
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QVariant minimumStepSize() const override;
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QVariant minimumValue() const override;
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void setCurrentValue(const QVariant& value) override;
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// QAccessibleTableInterface
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virtual QAccessibleInterface* caption() const override;
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virtual QAccessibleInterface* cellAt(int row, int column) const override;
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virtual int columnCount() const override;
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virtual QString columnDescription(int column) const override;
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virtual bool isColumnSelected(int column) const override;
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virtual bool isRowSelected(int row) const override;
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virtual void modelChange(QAccessibleTableModelChangeEvent* event) override;
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virtual int rowCount() const override;
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virtual QString rowDescription(int row) const override;
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virtual bool selectColumn(int column) override;
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virtual bool selectRow(int row) override;
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virtual int selectedCellCount() const override;
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virtual QList<QAccessibleInterface*> selectedCells() const override;
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virtual int selectedColumnCount() const override;
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virtual QList<int> selectedColumns() const override;
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virtual int selectedRowCount() const override;
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virtual QList<int> selectedRows() const override;
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virtual QAccessibleInterface* summary() const override;
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virtual bool unselectColumn(int column) override;
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virtual bool unselectRow(int row) override;
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// QAccessibleTableCellInterface
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virtual QList<QAccessibleInterface*> columnHeaderCells() const override;
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virtual int columnIndex() const override;
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virtual bool isSelected() const override;
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virtual int columnExtent() const override;
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virtual QList<QAccessibleInterface*> rowHeaderCells() const override;
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virtual int rowExtent() const override;
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virtual int rowIndex() const override;
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virtual QAccessibleInterface* table() const override;
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// Factory
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static QAccessibleInterface* customFactory(const QString& classname, QObject* object);
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private:
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css::uno::Reference<css::accessibility::XAccessible> m_xAccessible;
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css::uno::Reference<css::accessibility::XAccessibleContext> getAccessibleContextImpl() const;
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css::uno::Reference<css::accessibility::XAccessibleTable> getAccessibleTableForParent() const;
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template <class Interface> bool accessibleProvidesInterface() const
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{
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css::uno::Reference<css::accessibility::XAccessibleContext> xContext
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= getAccessibleContextImpl();
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css::uno::Reference<Interface> xInterface(xContext, css::uno::UNO_QUERY);
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return xInterface.is();
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}
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QObject* m_pObject;
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};
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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