/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module 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 "qevdevkeyboardmanager_p.h"

#include <QStringList>
#include <QCoreApplication>

//#define QT_QPA_KEYMAP_DEBUG

#ifdef QT_QPA_KEYMAP_DEBUG
#include <QDebug>
#endif

QT_BEGIN_NAMESPACE

QEvdevKeyboardManager::QEvdevKeyboardManager(const QString &key, const QString &specification, QObject *parent)
    : QObject(parent)
{
    Q_UNUSED(key);

    QStringList args = specification.split(QLatin1Char(':'));
    QStringList devices;

    foreach (const QString &arg, args) {
        if (arg.startsWith(QLatin1String("/dev/"))) {
            // if device is specified try to use it
            devices.append(arg);
            args.removeAll(arg);
        }
    }

    // build new specification without /dev/ elements
    m_spec = args.join(QLatin1Char(':'));

    // add all keyboards for devices specified in the argument list
    foreach (const QString &device, devices)
        addKeyboard(device);

    if (devices.isEmpty()) {
#ifdef QT_QPA_KEYMAP_DEBUG
        qWarning() << "Use device discovery";
#endif

        m_deviceDiscovery = QDeviceDiscovery::create(QDeviceDiscovery::Device_Keyboard, this);
        if (m_deviceDiscovery) {
            // scan and add already connected keyboards
            QStringList devices = m_deviceDiscovery->scanConnectedDevices();
            foreach (const QString &device, devices) {
                addKeyboard(device);
            }

            connect(m_deviceDiscovery, SIGNAL(deviceDetected(QString)), this, SLOT(addKeyboard(QString)));
            connect(m_deviceDiscovery, SIGNAL(deviceRemoved(QString)), this, SLOT(removeKeyboard(QString)));
        }
    }
}

QEvdevKeyboardManager::~QEvdevKeyboardManager()
{
    qDeleteAll(m_keyboards);
    m_keyboards.clear();
}

void QEvdevKeyboardManager::addKeyboard(const QString &deviceNode)
{
#ifdef QT_QPA_KEYMAP_DEBUG
    qWarning() << "Adding keyboard at" << deviceNode;
#endif

    QEvdevKeyboardHandler *keyboard;
    keyboard = QEvdevKeyboardHandler::create(deviceNode, m_spec);
    if (keyboard)
        m_keyboards.insert(deviceNode, keyboard);
    else
        qWarning("Failed to open keyboard");
}

void QEvdevKeyboardManager::removeKeyboard(const QString &deviceNode)
{
    if (m_keyboards.contains(deviceNode)) {
#ifdef QT_QPA_KEYMAP_DEBUG
        qWarning() << "Removing keyboard at" << deviceNode;
#endif
        QEvdevKeyboardHandler *keyboard = m_keyboards.value(deviceNode);
        m_keyboards.remove(deviceNode);
        delete keyboard;
    }
}

QT_END_NAMESPACE
