/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtTest module 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:
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** 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
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** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
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** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QTESTACCESSIBLE_H
#define QTESTACCESSIBLE_H

#if 0
// inform syncqt
#pragma qt_no_master_include
#endif

#ifndef QT_NO_ACCESSIBILITY

#define QVERIFY_EVENT(event) \
    QVERIFY(QTestAccessibility::verifyEvent(event))

#include <QtCore/qlist.h>
#include <QtGui/qaccessible.h>
#include <QtGui/qguiapplication.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE


class QObject;

// Use pointers since we subclass QAccessibleEvent
typedef QList<QAccessibleEvent*> EventList;

bool operator==(const QAccessibleEvent &l, const QAccessibleEvent &r)
{
    if (l.type() != r.type() ||
            l.object() != r.object() ||
            l.child() != r.child())
        return false;

    if (l.type() == QAccessible::StateChanged) {
        return static_cast<const QAccessibleStateChangeEvent*>(&l)->changedStates()
                == static_cast<const QAccessibleStateChangeEvent*>(&r)->changedStates();
    }
    return true;
}

class QTestAccessibility
{
public:
    static void initialize()
    {
        if (!instance()) {
            instance() = new QTestAccessibility;
            qAddPostRoutine(cleanup);
        }
    }

    static void cleanup()
    {
        delete instance();
        instance() = 0;
    }
    static void clearEvents() { eventList().clear(); }
    static EventList events() { return eventList(); }
    static bool verifyEvent(QAccessibleEvent *ev)
    {
        if (eventList().isEmpty())
            return false;
        QAccessibleEvent *first = eventList().takeFirst();
        bool res = *first == *ev;
        delete first;
        return res;
    }
    static bool containsEvent(QAccessibleEvent *event) {
        Q_FOREACH (QAccessibleEvent *ev, eventList()) {
            if (*ev == *event)
                return true;
        }
        return false;
    }

private:
    QTestAccessibility()
    {
        QAccessible::installUpdateHandler(updateHandler);
        QAccessible::installRootObjectHandler(rootObjectHandler);
    }

    ~QTestAccessibility()
    {
        QAccessible::installUpdateHandler(0);
        QAccessible::installRootObjectHandler(0);
    }

    static void rootObjectHandler(QObject *object)
    {
        //    qDebug("rootObjectHandler called %p", object);
        if (object) {
            QGuiApplication* app = qobject_cast<QGuiApplication*>(object);
            if ( !app )
                qWarning("%s: root Object is not a QGuiApplication!", Q_FUNC_INFO);
        } else {
            qWarning("%s: root Object called with 0 pointer", Q_FUNC_INFO);
        }
    }

    static void updateHandler(QAccessibleEvent *event)
    {
        eventList().append(copyEvent(event));
    }
    static QAccessibleEvent *copyEvent(QAccessibleEvent *event)
    {
        if (event->type() == QAccessible::StateChanged)
            return new QAccessibleStateChangeEvent(static_cast<const QAccessibleStateChangeEvent*>(event)->changedStates(),
                                                   event->object(), event->child());
        return new QAccessibleEvent(event->type(), event->object(), event->child());
    }

    static EventList &eventList()
    {
        static EventList list;
        return list;
    }

    static QTestAccessibility *&instance()
    {
        static QTestAccessibility *ta = 0;
        return ta;
    }
};

#endif

QT_END_NAMESPACE

QT_END_HEADER

#endif