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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, 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 1.0, 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qaccessible.h"
#include "qaccessible_mac_p.h"
#include "qdebug.h"
#include "qtabwidget.h"
#include <private/qt_mac_p.h>
#include <private/qcocoaview_mac_p.h>
#include <private/qwidget_p.h>
#ifndef QT_NO_ACCESSIBILITY
#ifdef QT_MAC_USE_COCOA
QT_BEGIN_NAMESPACE
//#define MAC_ACCESSIBILTY_DEVELOPER_MODE
#ifdef MAC_ACCESSIBILTY_DEVELOPER_MODE
#define MAC_ACCESSIBILTY_DEBUG qDebug
#else
#define MAC_ACCESSIBILTY_DEBUG if (0) qDebug
#endif
typedef QMap<QAccessible::Role, NSString *> QMacAccessibiltyRoleMap;
Q_GLOBAL_STATIC(QMacAccessibiltyRoleMap, qMacAccessibiltyRoleMap);
static QAInterface interfaceForView(QT_MANGLE_NAMESPACE(QCocoaView) *view)
{
return QAInterface(QAccessible::queryAccessibleInterface([view qt_qwidget]));
}
/*
Set up mappings from Qt accessibilty roles to Mac accessibilty roles.
*/
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;
}
/*
Returns a Mac accessibility role for the given interface, or
NSAccessibilityUnknownRole if no role mapping is found.
*/
static NSString *macRoleForInterface(QAInterface interface)
{
const QAccessible::Role qtRole = interface.role();
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;
}
/*
Is the interface a QTabBar embedded in a QTabWidget?
(as opposed to a stand-alone tab bar)
*/
static bool isEmbeddedTabBar(const QAInterface &interface)
{
QObject *object = interface.object();
if (interface.role() == QAccessible::PageTabList && object)
return (qobject_cast<QTabWidget *>(object->parent()));
return false;
}
static bool isInterfaceIgnored(QAInterface interface)
{
// Mac accessibility does not have an attribute that corresponds to the
// Invisible/Offscreen state. Use the ignore facility to disable them.
const QAccessible::State state = interface.state();
if (state & QAccessible::Invisible ||
state & QAccessible::Offscreen )
return false;
// Hide QTabBars that has a QTabWidget parent (the QTabWidget handles the accessibility)
if (isEmbeddedTabBar(interface))
return false;
if (QObject * const object = interface.object()) {
const QString className = QLatin1String(object->metaObject()->className());
// Prevent VoiceOver from focusing on tool tips by ignoring those
// interfaces. Shifting VoiceOver focus to the tool tip is confusing
// and the contents of the tool tip is avalible through the description
// attribute anyway.
if (className == QLatin1String("QTipLabel"))
return false;
}
// Hide interfaces with an unknown role. When developing it's often useful to disable
// this check to see all interfaces in the hierarchy.
#ifndef MAC_ACCESSIBILTY_DEVELOPER_MODE
return [macRoleForInterface(interface) isEqualToString: NSAccessibilityUnknownRole];
#else
return NO;
#endif
}
QT_END_NAMESPACE
@implementation QT_MANGLE_NAMESPACE(QCocoaView) (Accessibility)
- (BOOL)accessibilityIsIgnored
{
QAInterface interface = interfaceForView(self);
return isInterfaceIgnored(interface);
}
- (NSArray *)accessibilityAttributeNames
{
QAInterface interface = interfaceForView(self);
static NSArray *attributes = nil;
if (attributes == nil) {
attributes = [super accessibilityAttributeNames];
}
return attributes;
}
- (id)accessibilityAttributeValue:(NSString *)attribute
{
MAC_ACCESSIBILTY_DEBUG() << "accessibilityAttributeValue" << self << QCFString::toQString(reinterpret_cast<CFStringRef>(attribute));
QAInterface interface = interfaceForView(self);
// Switch on the attribute name and call the appropriate handler function.
// Pass the call on to the NSView class for attributes we don't handle.
if ([attribute isEqualToString:@"AXRole"]) {
return macRoleForInterface(interface);
} else {
return [super accessibilityAttributeValue:attribute];
}
}
@end
#endif // QT_MAC_USE_COCOA
#endif // QT_NO_ACCESSIBILITY
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