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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include <QtGui/qtguiglobal.h>
#if QT_CONFIG(accessibility)
#include "qwindowsuiaaccessibility.h"
#include "qwindowsuiautomation.h"
#include "qwindowsuiamainprovider.h"
#include "qwindowsuiautils.h"
#include <QtGui/qaccessible.h>
#include <QtGui/qwindow.h>
#include <QtGui/qguiapplication.h>
#include <QtGui/private/qguiapplication_p.h>
#include <QtCore/qt_windows.h>
#include <qpa/qplatformintegration.h>
#include <QtCore/private/qwinregistry_p.h>
QT_BEGIN_NAMESPACE
using namespace QWindowsUiAutomation;
using namespace Qt::Literals::StringLiterals;
bool QWindowsUiaAccessibility::m_accessibleActive = false;
QWindowsUiaAccessibility::QWindowsUiaAccessibility()
{
}
QWindowsUiaAccessibility::~QWindowsUiaAccessibility()
{
}
// Handles UI Automation window messages.
bool QWindowsUiaAccessibility::handleWmGetObject(HWND hwnd, WPARAM wParam, LPARAM lParam, LRESULT *lResult)
{
// Start handling accessibility internally
QGuiApplicationPrivate::platformIntegration()->accessibility()->setActive(true);
m_accessibleActive = true;
// Ignoring all requests while starting up / shutting down
if (QCoreApplication::startingUp() || QCoreApplication::closingDown())
return false;
if (QWindow *window = QWindowsContext::instance()->findWindow(hwnd)) {
if (QAccessibleInterface *accessible = window->accessibleRoot()) {
QWindowsUiaMainProvider *provider = QWindowsUiaMainProvider::providerForAccessible(accessible);
*lResult = UiaReturnRawElementProvider(hwnd, wParam, lParam, provider);
return true;
}
}
return false;
}
// Retrieve sound name by checking the icon property of a message box
// should it be the event object.
static QString alertSound(const QObject *object)
{
if (object->inherits("QMessageBox")) {
enum MessageBoxIcon { // Keep in sync with QMessageBox::Icon
Information = 1,
Warning = 2,
Critical = 3
};
switch (object->property("icon").toInt()) {
case Information:
return QStringLiteral("SystemAsterisk");
case Warning:
return QStringLiteral("SystemExclamation");
case Critical:
return QStringLiteral("SystemHand");
}
return QString();
}
return QStringLiteral("SystemAsterisk");
}
static QString soundFileName(const QString &soundName)
{
const QString key = "AppEvents\\Schemes\\Apps\\.Default\\"_L1
+ soundName + "\\.Current"_L1;
return QWinRegistryKey(HKEY_CURRENT_USER, key).stringValue(L"");
}
static void playSystemSound(const QString &soundName)
{
if (!soundName.isEmpty() && !soundFileName(soundName).isEmpty()) {
PlaySound(reinterpret_cast<const wchar_t *>(soundName.utf16()), nullptr,
SND_ALIAS | SND_ASYNC | SND_NODEFAULT | SND_NOWAIT);
}
}
// Handles accessibility update notifications.
void QWindowsUiaAccessibility::notifyAccessibilityUpdate(QAccessibleEvent *event)
{
if (!event)
return;
// Always handle system sound events
switch (event->type()) {
case QAccessible::PopupMenuStart:
playSystemSound(QStringLiteral("MenuPopup"));
break;
case QAccessible::MenuCommand:
playSystemSound(QStringLiteral("MenuCommand"));
break;
case QAccessible::Alert:
playSystemSound(alertSound(event->object()));
break;
default:
break;
}
// Ignore events sent before the first UI Automation
// request or while QAccessible is being activated.
if (!m_accessibleActive)
return;
QAccessibleInterface *accessible = event->accessibleInterface();
if (!isActive() || !accessible || !accessible->isValid())
return;
// No need to do anything when nobody is listening.
if (!UiaClientsAreListening())
return;
switch (event->type()) {
case QAccessible::Focus:
QWindowsUiaMainProvider::notifyFocusChange(event);
break;
case QAccessible::StateChanged:
QWindowsUiaMainProvider::notifyStateChange(static_cast<QAccessibleStateChangeEvent *>(event));
break;
case QAccessible::ValueChanged:
QWindowsUiaMainProvider::notifyValueChange(static_cast<QAccessibleValueChangeEvent *>(event));
break;
case QAccessible::NameChanged:
QWindowsUiaMainProvider::notifyNameChange(event);
break;
case QAccessible::SelectionAdd:
QWindowsUiaMainProvider::notifySelectionChange(event);
break;
case QAccessible::TextAttributeChanged:
case QAccessible::TextColumnChanged:
case QAccessible::TextInserted:
case QAccessible::TextRemoved:
case QAccessible::TextUpdated:
case QAccessible::TextSelectionChanged:
case QAccessible::TextCaretMoved:
QWindowsUiaMainProvider::notifyTextChange(event);
break;
default:
break;
}
}
QT_END_NAMESPACE
#endif // QT_CONFIG(accessibility)
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