/****************************************************************************
**
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** This file is part of the plugins of the Qt Toolkit.
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** General Public License version 3 as published by the Free Software
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** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
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** General Public License version 2.0 or (at your option) the GNU General
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#include <QtGui/qtguiglobal.h>
#if QT_CONFIG(accessibility)

#include "qwindowsuiaaccessibility.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 <QtWindowsUIAutomationSupport/private/qwindowsuiawrapper_p.h>

QT_BEGIN_NAMESPACE

using namespace QWindowsUiAutomation;


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);

    // 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 = QWindowsUiaWrapper::instance()->returnRawElementProvider(hwnd, wParam, lParam, provider);
            return true;
        }
    }
    return false;
}

// Handles accessibility update notifications.
void QWindowsUiaAccessibility::notifyAccessibilityUpdate(QAccessibleEvent *event)
{
    if (!event)
        return;

    QAccessibleInterface *accessible = event->accessibleInterface();
    if (!isActive() || !accessible || !accessible->isValid())
        return;

    // Ensures QWindowsUiaWrapper is properly initialized.
    if (!QWindowsUiaWrapper::instance()->ready())
        return;

    // No need to do anything when nobody is listening.
    if (!QWindowsUiaWrapper::instance()->clientsAreListening())
        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::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)