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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights. These rights are described in the Digia 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore/QtConfig>
#ifndef QT_NO_ACCESSIBILITY
#include <private/qsystemlibrary_p.h>
#include <QtCore/qlocale.h>
#include <QtCore/qmap.h>
#include <QtCore/qpair.h>
#include <QtCore/qpointer.h>
#include <QtCore/qsettings.h>
#include <QtGui/qaccessible.h>
#include <QtGui/private/qguiapplication_p.h>
#include <qpa/qplatformnativeinterface.h>
#include <qpa/qplatformintegration.h>
#include <QtGui/qwindow.h>
#include <QtGui/qguiapplication.h>
#include "qwindowsaccessibility.h"
#ifdef Q_CC_MINGW
# include "qwindowsmsaaaccessible.h"
#else
# include "iaccessible2.h"
#endif
#include "comutils.h"
#include <oleacc.h>
//#include <uiautomationcoreapi.h>
#ifndef UiaRootObjectId
#define UiaRootObjectId -25
#endif
#include <winuser.h>
#if !defined(WINABLEAPI)
# if defined(Q_OS_WINCE)
# include <bldver.h>
# endif
# include <winable.h>
#endif
#include <servprov.h>
#if !defined(Q_CC_BOR) && !defined (Q_CC_GNU)
#include <comdef.h>
#endif
#include "../qtwindows_additional.h"
QT_BEGIN_NAMESPACE
/*!
\!internal
\class QWindowsAccessibility
Implements QPlatformAccessibility
*/
QWindowsAccessibility::QWindowsAccessibility()
{
}
void QWindowsAccessibility::notifyAccessibilityUpdate(QAccessibleEvent *event)
{
QString soundName;
switch (event->type()) {
case QAccessible::PopupMenuStart:
soundName = QLatin1String("MenuPopup");
break;
case QAccessible::MenuCommand:
soundName = QLatin1String("MenuCommand");
break;
case QAccessible::Alert:
{
/* ### FIXME
#ifndef QT_NO_MESSAGEBOX
QMessageBox *mb = qobject_cast<QMessageBox*>(o);
if (mb) {
switch (mb->icon()) {
case QMessageBox::Warning:
soundName = QLatin1String("SystemExclamation");
break;
case QMessageBox::Critical:
soundName = QLatin1String("SystemHand");
break;
case QMessageBox::Information:
soundName = QLatin1String("SystemAsterisk");
break;
default:
break;
}
} else
#endif // QT_NO_MESSAGEBOX
*/
{
soundName = QLatin1String("SystemAsterisk");
}
}
break;
default:
break;
}
if (!soundName.isEmpty()) {
#ifndef QT_NO_SETTINGS
QSettings settings(QLatin1String("HKEY_CURRENT_USER\\AppEvents\\Schemes\\Apps\\.Default\\") + soundName,
QSettings::NativeFormat);
QString file = settings.value(QLatin1String(".Current/.")).toString();
#else
QString file;
#endif
if (!file.isEmpty()) {
PlaySound(reinterpret_cast<const wchar_t *>(soundName.utf16()), 0, SND_ALIAS | SND_ASYNC | SND_NODEFAULT | SND_NOWAIT);
}
}
#if defined(Q_OS_WINCE) // ### TODO: check for NotifyWinEvent in CE 6.0
// There is no user32.lib nor NotifyWinEvent for CE
return;
#else
// An event has to be associated with a window,
// so find the first parent that is a widget and that has a WId
QAccessibleInterface *iface = event->accessibleInterface();
if (!iface) // ### This should not happen, maybe make it an assert.
return;
QWindow *window = QWindowsAccessibility::windowHelper(iface);
if (!window) {
window = QGuiApplication::focusWindow();
if (!window)
return;
}
QPlatformNativeInterface *platform = QGuiApplication::platformNativeInterface();
if (!window->handle()) // Called before show(), no native window yet.
return;
HWND hWnd = (HWND)platform->nativeResourceForWindow("handle", window);
if (event->type() != QAccessible::MenuCommand && // MenuCommand is faked
event->type() != QAccessible::ObjectDestroyed) {
::NotifyWinEvent(event->type(), hWnd, OBJID_CLIENT, QAccessible::uniqueId(iface));
}
#endif // Q_OS_WINCE
}
QWindow *QWindowsAccessibility::windowHelper(const QAccessibleInterface *iface)
{
QWindow *window = iface->window();
if (!window) {
QAccessibleInterface *acc = iface->parent();
while (acc && acc->isValid() && !window) {
window = acc->window();
QAccessibleInterface *par = acc->parent();
acc = par;
}
}
return window;
}
/*!
\internal
helper to wrap a QAccessibleInterface inside a IAccessible*
*/
IAccessible *QWindowsAccessibility::wrap(QAccessibleInterface *acc)
{
if (!acc)
return 0;
// ### FIXME: maybe we should accept double insertions into the cache
if (!QAccessible::uniqueId(acc))
QAccessible::registerAccessibleInterface(acc);
#ifdef Q_CC_MINGW
QWindowsMsaaAccessible *wacc = new QWindowsMsaaAccessible(acc);
#else
QWindowsIA2Accessible *wacc = new QWindowsIA2Accessible(acc);
#endif
IAccessible *iacc = 0;
wacc->QueryInterface(IID_IAccessible, (void**)&iacc);
return iacc;
}
/*
void QWindowsAccessibility::setRootObject(QObject *o)
{
}
void QWindowsAccessibility::initialize()
{
}
void QWindowsAccessibility::cleanup()
{
}
*/
bool QWindowsAccessibility::handleAccessibleObjectFromWindowRequest(HWND hwnd, WPARAM wParam, LPARAM lParam, LRESULT *lResult)
{
if (static_cast<long>(lParam) == static_cast<long>(UiaRootObjectId)) {
/* For UI Automation */
} else if ((DWORD)lParam == DWORD(OBJID_CLIENT)) {
// Start handling accessibility internally
QGuiApplicationPrivate::platformIntegration()->accessibility()->setActive(true);
#if 1
// Ignoring all requests while starting up
// ### Maybe QPA takes care of this???
if (QCoreApplication::startingUp() || QCoreApplication::closingDown())
return false;
#endif
typedef LRESULT (WINAPI *PtrLresultFromObject)(REFIID, WPARAM, LPUNKNOWN);
static PtrLresultFromObject ptrLresultFromObject = 0;
static bool oleaccChecked = false;
if (!oleaccChecked) {
oleaccChecked = true;
#if !defined(Q_OS_WINCE)
ptrLresultFromObject = (PtrLresultFromObject)QSystemLibrary::resolve(QLatin1String("oleacc"), "LresultFromObject");
#endif
}
if (ptrLresultFromObject) {
QWindow *window = QWindowsContext::instance()->findWindow(hwnd);
if (window) {
QAccessibleInterface *acc = window->accessibleRoot();
if (acc) {
if (IAccessible *iface = wrap(acc)) {
*lResult = ptrLresultFromObject(IID_IAccessible, wParam, iface); // ref == 2
if (*lResult) {
iface->Release(); // the client will release the object again, and then it will destroy itself
}
return true;
}
}
}
}
}
return false;
}
QT_END_NAMESPACE
#endif //QT_NO_ACCESSIBILITY
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