/****************************************************************************

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbCore module of the UI Extensions for Mobile.

**

** 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:

** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

****************************************************************************/

#include "hbdeviceprofilereader_p.h"

#include "hbdeviceprofiledatabase_p.h"

#include <qmath.h>

/*

    \class HbDeviceProfileReader

    \brief The HbDeviceProfileReader class implements a stream parser

    that reads well-formed XML documents containing display definitions.

    \warning This class is a part of internal library implementation and may

    be removed from the public API!

    \internal

    \proto

*/

/*! Constructor.

*/

HbDeviceProfileReader::HbDeviceProfileReader(HbDeviceProfileList *profileList,

        HbMemoryManager::MemoryType type

                                            )

    : QXmlStreamReader(), mDeviceProfileList(profileList), mType(type)

{

}

/*! Destructor.

*/

HbDeviceProfileReader::~HbDeviceProfileReader()

{

}

/*! Reads a well-formed display definitions XML document from the given QIODevice and

    adds the metrics found to the device profile list.

    If no error occurred, returns true; otherwise returns false.

*/

bool HbDeviceProfileReader::read(QIODevice *device)

{

    if (!mDeviceProfileList) {

        raiseError("HbDeviceProfileReader::read No device profile object assigned.");

        return false;

    }

    setDevice(device);

    while (!atEnd()) {

        readNext();

        if (isStartElement()) {

            if (name() == "displayDefinition") {

                readDisplayDefinitions();

            } else {

                raiseError(

                    "HbDeviceProfileReader::read The document is not a display definition document.");

            }

        }

    }

    return !error();

}

/*! Reads a well-formed display definitions XML document and

    adds the metrics found to the device profile list.

*/

void HbDeviceProfileReader::readDisplayDefinitions()

{

    Q_ASSERT(isStartElement() && name() == "displayDefinition");

    while (!atEnd()) {

        readNext();

        if (isEndElement()) {

            continue;

        }

        if (isStartElement()) {

            if (name() == "display") {

                readAttributes();

            } else {

                readUnknownElement();

            }

        }

    }

}

/*! Parses attributes from the display definition and sets values to the device profile.

*/

void HbDeviceProfileReader::readAttributes()

{

    Q_ASSERT(isStartElement() && name() == "display");

    QXmlStreamAttributes attrs = attributes();

    DeviceProfile deviceProfile(mType);

    int w = attrs.value("resolutionWidth").toString().toInt();

    int h = attrs.value("resolutionHeight").toString().toInt();

    deviceProfile.mLogicalSize.setWidth(w);

    deviceProfile.mLogicalSize.setHeight(h);

    QString orientationStr = "portrait";

    QString altOrientationStr = "landscape";

    if (w > h) {

        orientationStr = "landscape";

        altOrientationStr = "portrait";

    }

    deviceProfile.mUnitValue = attrs.value("unitValue").toString().toFloat();

    deviceProfile.mPpiValue = attrs.value("ppiValue").toString().toFloat();

    deviceProfile.mOrientationAngle = attrs.value("orientationAngle").toString().toInt();

    QString resName = attrs.value("resolutionName").toString();

    // Legacy support for deprecated "styleName"

    if (resName.isEmpty()) {

        resName = attrs.value("styleName").toString();

    }

    // Calculate inch size

    qreal diagonal = qSqrt((qreal)(w * w + h * h)); // in "pixels"

    int inchSizeX10 = qRound(10 * (diagonal / deviceProfile.mPpiValue));

    QString inchSizeStr = QString::number(inchSizeX10 / 10);

    inchSizeStr.append('.');

    inchSizeStr.append(QString::number(inchSizeX10 % 10));

    deviceProfile.mName = resName + '-' + inchSizeStr + "-inch_" + orientationStr;

    deviceProfile.mAltName = resName + '-' + inchSizeStr + "-inch_" + altOrientationStr;

    bool defaultMode = false;

    defaultMode = attrs.value("defaultMode").toString() == "true";

    if (defaultMode) {

        mDeviceProfileList->insert(0, deviceProfile);

    } else {

        mDeviceProfileList->append(deviceProfile);

    }

}

void HbDeviceProfileReader::readUnknownElement()

{

    Q_ASSERT(isStartElement());

    while (!atEnd()) {

        readNext();

        if (isEndElement()) {

            break;

        }

        if (isStartElement()) {

            readUnknownElement();

        }

    }

}