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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: http://www.qt-project.org/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qcocoaaccessibility.h"
namespace QCocoaAccessible {
typedef QMap<QAccessible::Role, NSString *> QMacAccessibiltyRoleMap;
Q_GLOBAL_STATIC(QMacAccessibiltyRoleMap, qMacAccessibiltyRoleMap);
static void populateRoleMap()
{
QMacAccessibiltyRoleMap &roleMap = *qMacAccessibiltyRoleMap();
roleMap[QAccessible::MenuItem] = NSAccessibilityMenuItemRole;
roleMap[QAccessible::MenuBar] = NSAccessibilityMenuBarRole;
roleMap[QAccessible::ScrollBar] = NSAccessibilityScrollBarRole;
roleMap[QAccessible::Grip] = NSAccessibilityGrowAreaRole;
roleMap[QAccessible::Window] = NSAccessibilityWindowRole;
roleMap[QAccessible::Dialog] = NSAccessibilityWindowRole;
roleMap[QAccessible::AlertMessage] = NSAccessibilityWindowRole;
roleMap[QAccessible::ToolTip] = NSAccessibilityWindowRole;
roleMap[QAccessible::HelpBalloon] = NSAccessibilityWindowRole;
roleMap[QAccessible::PopupMenu] = NSAccessibilityMenuRole;
roleMap[QAccessible::Application] = NSAccessibilityApplicationRole;
roleMap[QAccessible::Pane] = NSAccessibilityGroupRole;
roleMap[QAccessible::Grouping] = NSAccessibilityGroupRole;
roleMap[QAccessible::Separator] = NSAccessibilitySplitterRole;
roleMap[QAccessible::ToolBar] = NSAccessibilityToolbarRole;
roleMap[QAccessible::PageTab] = NSAccessibilityRadioButtonRole;
roleMap[QAccessible::ButtonMenu] = NSAccessibilityMenuButtonRole;
roleMap[QAccessible::ButtonDropDown] = NSAccessibilityPopUpButtonRole;
roleMap[QAccessible::SpinBox] = NSAccessibilityIncrementorRole;
roleMap[QAccessible::Slider] = NSAccessibilitySliderRole;
roleMap[QAccessible::ProgressBar] = NSAccessibilityProgressIndicatorRole;
roleMap[QAccessible::ComboBox] = NSAccessibilityPopUpButtonRole;
roleMap[QAccessible::RadioButton] = NSAccessibilityRadioButtonRole;
roleMap[QAccessible::CheckBox] = NSAccessibilityCheckBoxRole;
roleMap[QAccessible::StaticText] = NSAccessibilityStaticTextRole;
roleMap[QAccessible::Table] = NSAccessibilityTableRole;
roleMap[QAccessible::StatusBar] = NSAccessibilityStaticTextRole;
roleMap[QAccessible::Column] = NSAccessibilityColumnRole;
roleMap[QAccessible::ColumnHeader] = NSAccessibilityColumnRole;
roleMap[QAccessible::Row] = NSAccessibilityRowRole;
roleMap[QAccessible::RowHeader] = NSAccessibilityRowRole;
roleMap[QAccessible::Cell] = NSAccessibilityTextFieldRole;
roleMap[QAccessible::PushButton] = NSAccessibilityButtonRole;
roleMap[QAccessible::EditableText] = NSAccessibilityTextFieldRole;
roleMap[QAccessible::Link] = NSAccessibilityTextFieldRole;
roleMap[QAccessible::Indicator] = NSAccessibilityValueIndicatorRole;
roleMap[QAccessible::Splitter] = NSAccessibilitySplitGroupRole;
roleMap[QAccessible::List] = NSAccessibilityListRole;
roleMap[QAccessible::ListItem] = NSAccessibilityStaticTextRole;
roleMap[QAccessible::Cell] = NSAccessibilityStaticTextRole;
roleMap[QAccessible::Client] = NSAccessibilityGroupRole;
}
/*
Returns a Mac accessibility role for the given interface, or
NSAccessibilityUnknownRole if no role mapping is found.
*/
NSString *macRole(QAccessible::Role qtRole)
{
QMacAccessibiltyRoleMap &roleMap = *qMacAccessibiltyRoleMap();
if (roleMap.isEmpty())
populateRoleMap();
// MAC_ACCESSIBILTY_DEBUG() << "role for" << interface.object() << "interface role" << hex << qtRole;
if (roleMap.contains(qtRole)) {
// MAC_ACCESSIBILTY_DEBUG() << "return" << roleMap[qtRole];
return roleMap[qtRole];
}
// MAC_ACCESSIBILTY_DEBUG() << "return NSAccessibilityUnknownRole";
return NSAccessibilityUnknownRole;
}
/*
Mac accessibility supports ignoring elements, which means that
the elements are still present in the accessibility tree but is
not used by the screen reader.
*/
bool shouldBeIgnrored(QAccessibleInterface *interface)
{
// Mac accessibility does not have an attribute that corresponds to the Invisible/Offscreen
// state. Ignore interfaces with those flags set.
const QAccessible::State state = interface->state();
if (state.invisible ||
state.offscreen)
return true;
// Some roles are not interesting. In particular, container roles should be
// ignored in order to flatten the accessibility tree as seen by the user.
const QAccessible::Role role = interface->role();
if (role == QAccessible::Border || // QFrame
role == QAccessible::Application || // We use the system-provided application element.
role == QAccessible::MenuItem || // The system also provides the menu items.
role == QAccessible::ToolBar) // Access the tool buttons directly.
return true;
NSString *mac_role = macRole(interface->role());
if (mac_role == NSAccessibilityWindowRole || // We use the system-provided window elements.
mac_role == NSAccessibilityGroupRole ||
mac_role == NSAccessibilityUnknownRole)
return true;
// Client is a generic role returned by plain QWidgets or other
// widgets that does not have separate QAccessible interface, such
// as the TabWidget. Return false unless macRole gives the interface
// a special role.
if (role == QAccessible::Client && mac_role == NSAccessibilityUnknownRole)
return true;
if (QObject * const object = interface->object()) {
const QString className = QLatin1String(object->metaObject()->className());
// VoiceOver focusing on tool tips can be confusing. The contents of the
// tool tip is available through the description attribute anyway, so
// we disable accessibility for tool tips.
if (className == QLatin1String("QTipLabel"))
return true;
}
return false;
}
/*
Translates a predefined QAccessibleActionInterface action to a Mac action constant.
Returns 0 if the Qt Action has no mac equivalent. Ownership of the NSString is
not transferred.
*/
NSString *getTranslatedAction(const QString &qtAction)
{
if (qtAction == QAccessibleActionInterface::pressAction())
return NSAccessibilityPressAction;
else if (qtAction == QAccessibleActionInterface::increaseAction())
return NSAccessibilityIncrementAction;
else if (qtAction == QAccessibleActionInterface::decreaseAction())
return NSAccessibilityDecrementAction;
else if (qtAction == QAccessibleActionInterface::showMenuAction())
return NSAccessibilityShowMenuAction;
else if (qtAction == QAccessibleActionInterface::setFocusAction()) // Not 100% sure on this one
return NSAccessibilityRaiseAction;
// Not translated:
//
// Qt:
// static const QString &checkAction();
// static const QString &uncheckAction();
//
// Cocoa:
// NSAccessibilityConfirmAction;
// NSAccessibilityPickAction;
// NSAccessibilityCancelAction;
// NSAccessibilityDeleteAction;
return 0;
}
/*
Translates between a Mac action constant and a QAccessibleActionInterface action
Returns an empty QString if there is no Qt predefined equivalent.
*/
QString translateAction(NSString *nsAction)
{
if ([nsAction compare: NSAccessibilityPressAction] == NSOrderedSame)
return QAccessibleActionInterface::pressAction();
else if ([nsAction compare: NSAccessibilityIncrementAction] == NSOrderedSame)
return QAccessibleActionInterface::increaseAction();
else if ([nsAction compare: NSAccessibilityDecrementAction] == NSOrderedSame)
return QAccessibleActionInterface::decreaseAction();
else if ([nsAction compare: NSAccessibilityShowMenuAction] == NSOrderedSame)
return QAccessibleActionInterface::showMenuAction();
else if ([nsAction compare: NSAccessibilityRaiseAction] == NSOrderedSame)
return QAccessibleActionInterface::setFocusAction();
// See getTranslatedAction for not matched translations.
return QString();
}
} // namespace QCocoaAccessible
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